1 | /* BFD back-end for HP PA-RISC ELF files.
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2 | Copyright (C) 1990-2016 Free Software Foundation, Inc.
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3 |
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4 | Original code by
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5 | Center for Software Science
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6 | Department of Computer Science
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7 | University of Utah
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8 | Largely rewritten by Alan Modra <alan@linuxcare.com.au>
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9 | Naming cleanup by Carlos O'Donell <carlos@systemhalted.org>
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10 | TLS support written by Randolph Chung <tausq@debian.org>
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11 |
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12 | This file is part of BFD, the Binary File Descriptor library.
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13 |
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14 | This program is free software; you can redistribute it and/or modify
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15 | it under the terms of the GNU General Public License as published by
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16 | the Free Software Foundation; either version 3 of the License, or
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17 | (at your option) any later version.
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18 |
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19 | This program is distributed in the hope that it will be useful,
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20 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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22 | GNU General Public License for more details.
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23 |
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24 | You should have received a copy of the GNU General Public License
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25 | along with this program; if not, write to the Free Software
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26 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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27 | MA 02110-1301, USA. */
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28 |
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29 | #include "sysdep.h"
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30 | #include "bfd.h"
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31 | #include "libbfd.h"
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32 | #include "elf-bfd.h"
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33 | #include "elf/hppa.h"
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34 | #include "libhppa.h"
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35 | #include "elf32-hppa.h"
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36 | #define ARCH_SIZE 32
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37 | #include "elf32-hppa.h"
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38 | #include "elf-hppa.h"
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39 |
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40 | /* In order to gain some understanding of code in this file without
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41 | knowing all the intricate details of the linker, note the
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42 | following:
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43 |
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44 | Functions named elf32_hppa_* are called by external routines, other
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45 | functions are only called locally. elf32_hppa_* functions appear
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46 | in this file more or less in the order in which they are called
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47 | from external routines. eg. elf32_hppa_check_relocs is called
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48 | early in the link process, elf32_hppa_finish_dynamic_sections is
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49 | one of the last functions. */
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50 |
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51 | /* We use two hash tables to hold information for linking PA ELF objects.
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52 |
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53 | The first is the elf32_hppa_link_hash_table which is derived
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54 | from the standard ELF linker hash table. We use this as a place to
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55 | attach other hash tables and static information.
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56 |
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57 | The second is the stub hash table which is derived from the
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58 | base BFD hash table. The stub hash table holds the information
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59 | necessary to build the linker stubs during a link.
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60 |
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61 | There are a number of different stubs generated by the linker.
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62 |
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63 | Long branch stub:
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64 | : ldil LR'X,%r1
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65 | : be,n RR'X(%sr4,%r1)
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66 |
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67 | PIC long branch stub:
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68 | : b,l .+8,%r1
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69 | : addil LR'X - ($PIC_pcrel$0 - 4),%r1
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70 | : be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1)
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71 |
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72 | Import stub to call shared library routine from normal object file
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73 | (single sub-space version)
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74 | : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point
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75 | : ldw RR'lt_ptr+ltoff(%r1),%r21
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76 | : bv %r0(%r21)
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77 | : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value.
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78 |
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79 | Import stub to call shared library routine from shared library
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80 | (single sub-space version)
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81 | : addil LR'ltoff,%r19 ; get procedure entry point
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82 | : ldw RR'ltoff(%r1),%r21
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83 | : bv %r0(%r21)
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84 | : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value.
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85 |
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86 | Import stub to call shared library routine from normal object file
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87 | (multiple sub-space support)
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88 | : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point
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89 | : ldw RR'lt_ptr+ltoff(%r1),%r21
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90 | : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value.
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91 | : ldsid (%r21),%r1
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92 | : mtsp %r1,%sr0
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93 | : be 0(%sr0,%r21) ; branch to target
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94 | : stw %rp,-24(%sp) ; save rp
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95 |
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96 | Import stub to call shared library routine from shared library
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97 | (multiple sub-space support)
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98 | : addil LR'ltoff,%r19 ; get procedure entry point
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99 | : ldw RR'ltoff(%r1),%r21
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100 | : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value.
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101 | : ldsid (%r21),%r1
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102 | : mtsp %r1,%sr0
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103 | : be 0(%sr0,%r21) ; branch to target
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104 | : stw %rp,-24(%sp) ; save rp
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105 |
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106 | Export stub to return from shared lib routine (multiple sub-space support)
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107 | One of these is created for each exported procedure in a shared
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108 | library (and stored in the shared lib). Shared lib routines are
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109 | called via the first instruction in the export stub so that we can
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110 | do an inter-space return. Not required for single sub-space.
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111 | : bl,n X,%rp ; trap the return
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112 | : nop
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113 | : ldw -24(%sp),%rp ; restore the original rp
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114 | : ldsid (%rp),%r1
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115 | : mtsp %r1,%sr0
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116 | : be,n 0(%sr0,%rp) ; inter-space return. */
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117 |
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118 |
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119 | /* Variable names follow a coding style.
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120 | Please follow this (Apps Hungarian) style:
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121 |
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122 | Structure/Variable Prefix
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123 | elf_link_hash_table "etab"
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124 | elf_link_hash_entry "eh"
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125 |
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126 | elf32_hppa_link_hash_table "htab"
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127 | elf32_hppa_link_hash_entry "hh"
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128 |
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129 | bfd_hash_table "btab"
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130 | bfd_hash_entry "bh"
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131 |
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132 | bfd_hash_table containing stubs "bstab"
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133 | elf32_hppa_stub_hash_entry "hsh"
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134 |
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135 | elf32_hppa_dyn_reloc_entry "hdh"
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136 |
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137 | Always remember to use GNU Coding Style. */
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138 |
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139 | #define PLT_ENTRY_SIZE 8
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140 | #define GOT_ENTRY_SIZE 4
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141 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
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142 |
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143 | static const bfd_byte plt_stub[] =
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144 | {
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145 | 0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */
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146 | 0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */
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147 | 0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */
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148 | #define PLT_STUB_ENTRY (3*4)
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149 | 0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */
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150 | 0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */
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151 | 0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */
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152 | 0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */
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153 | };
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154 |
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155 | /* Section name for stubs is the associated section name plus this
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156 | string. */
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157 | #define STUB_SUFFIX ".stub"
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158 |
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159 | /* We don't need to copy certain PC- or GP-relative dynamic relocs
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160 | into a shared object's dynamic section. All the relocs of the
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161 | limited class we are interested in, are absolute. */
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162 | #ifndef RELATIVE_DYNRELOCS
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163 | #define RELATIVE_DYNRELOCS 0
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164 | #define IS_ABSOLUTE_RELOC(r_type) 1
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165 | #endif
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166 |
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167 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
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168 | copying dynamic variables from a shared lib into an app's dynbss
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169 | section, and instead use a dynamic relocation to point into the
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170 | shared lib. */
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171 | #define ELIMINATE_COPY_RELOCS 1
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172 |
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173 | enum elf32_hppa_stub_type
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174 | {
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175 | hppa_stub_long_branch,
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176 | hppa_stub_long_branch_shared,
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177 | hppa_stub_import,
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178 | hppa_stub_import_shared,
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179 | hppa_stub_export,
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180 | hppa_stub_none
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181 | };
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182 |
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183 | struct elf32_hppa_stub_hash_entry
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184 | {
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185 | /* Base hash table entry structure. */
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186 | struct bfd_hash_entry bh_root;
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187 |
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188 | /* The stub section. */
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189 | asection *stub_sec;
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190 |
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191 | /* Offset within stub_sec of the beginning of this stub. */
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192 | bfd_vma stub_offset;
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193 |
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194 | /* Given the symbol's value and its section we can determine its final
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195 | value when building the stubs (so the stub knows where to jump. */
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196 | bfd_vma target_value;
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197 | asection *target_section;
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198 |
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199 | enum elf32_hppa_stub_type stub_type;
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200 |
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201 | /* The symbol table entry, if any, that this was derived from. */
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202 | struct elf32_hppa_link_hash_entry *hh;
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203 |
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204 | /* Where this stub is being called from, or, in the case of combined
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205 | stub sections, the first input section in the group. */
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206 | asection *id_sec;
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207 | };
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208 |
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209 | struct elf32_hppa_link_hash_entry
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210 | {
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211 | struct elf_link_hash_entry eh;
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212 |
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213 | /* A pointer to the most recently used stub hash entry against this
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214 | symbol. */
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215 | struct elf32_hppa_stub_hash_entry *hsh_cache;
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216 |
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217 | /* Used to count relocations for delayed sizing of relocation
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218 | sections. */
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219 | struct elf32_hppa_dyn_reloc_entry
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220 | {
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221 | /* Next relocation in the chain. */
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222 | struct elf32_hppa_dyn_reloc_entry *hdh_next;
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223 |
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224 | /* The input section of the reloc. */
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225 | asection *sec;
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226 |
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227 | /* Number of relocs copied in this section. */
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228 | bfd_size_type count;
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229 |
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230 | #if RELATIVE_DYNRELOCS
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231 | /* Number of relative relocs copied for the input section. */
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232 | bfd_size_type relative_count;
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233 | #endif
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234 | } *dyn_relocs;
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235 |
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236 | enum
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237 | {
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238 | GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_GD = 2, GOT_TLS_LDM = 4, GOT_TLS_IE = 8
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239 | } tls_type;
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240 |
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241 | /* Set if this symbol is used by a plabel reloc. */
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242 | unsigned int plabel:1;
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243 | };
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244 |
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245 | struct elf32_hppa_link_hash_table
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246 | {
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247 | /* The main hash table. */
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248 | struct elf_link_hash_table etab;
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249 |
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250 | /* The stub hash table. */
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251 | struct bfd_hash_table bstab;
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252 |
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253 | /* Linker stub bfd. */
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254 | bfd *stub_bfd;
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255 |
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256 | /* Linker call-backs. */
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257 | asection * (*add_stub_section) (const char *, asection *);
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258 | void (*layout_sections_again) (void);
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259 |
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260 | /* Array to keep track of which stub sections have been created, and
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261 | information on stub grouping. */
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262 | struct map_stub
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263 | {
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264 | /* This is the section to which stubs in the group will be
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265 | attached. */
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266 | asection *link_sec;
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267 | /* The stub section. */
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268 | asection *stub_sec;
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269 | } *stub_group;
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270 |
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271 | /* Assorted information used by elf32_hppa_size_stubs. */
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272 | unsigned int bfd_count;
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273 | unsigned int top_index;
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274 | asection **input_list;
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275 | Elf_Internal_Sym **all_local_syms;
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276 |
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277 | /* Short-cuts to get to dynamic linker sections. */
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278 | asection *sgot;
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279 | asection *srelgot;
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280 | asection *splt;
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281 | asection *srelplt;
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282 | asection *sdynbss;
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283 | asection *srelbss;
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284 |
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285 | /* Used during a final link to store the base of the text and data
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286 | segments so that we can perform SEGREL relocations. */
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287 | bfd_vma text_segment_base;
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288 | bfd_vma data_segment_base;
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289 |
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290 | /* Whether we support multiple sub-spaces for shared libs. */
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291 | unsigned int multi_subspace:1;
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292 |
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293 | /* Flags set when various size branches are detected. Used to
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294 | select suitable defaults for the stub group size. */
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295 | unsigned int has_12bit_branch:1;
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296 | unsigned int has_17bit_branch:1;
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297 | unsigned int has_22bit_branch:1;
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298 |
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299 | /* Set if we need a .plt stub to support lazy dynamic linking. */
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300 | unsigned int need_plt_stub:1;
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301 |
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302 | /* Small local sym cache. */
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303 | struct sym_cache sym_cache;
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304 |
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305 | /* Data for LDM relocations. */
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306 | union
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307 | {
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308 | bfd_signed_vma refcount;
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309 | bfd_vma offset;
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310 | } tls_ldm_got;
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311 | };
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312 |
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313 | /* Various hash macros and functions. */
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314 | #define hppa_link_hash_table(p) \
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315 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
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316 | == HPPA32_ELF_DATA ? ((struct elf32_hppa_link_hash_table *) ((p)->hash)) : NULL)
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317 |
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318 | #define hppa_elf_hash_entry(ent) \
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319 | ((struct elf32_hppa_link_hash_entry *)(ent))
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320 |
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321 | #define hppa_stub_hash_entry(ent) \
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322 | ((struct elf32_hppa_stub_hash_entry *)(ent))
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323 |
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324 | #define hppa_stub_hash_lookup(table, string, create, copy) \
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325 | ((struct elf32_hppa_stub_hash_entry *) \
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326 | bfd_hash_lookup ((table), (string), (create), (copy)))
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327 |
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328 | #define hppa_elf_local_got_tls_type(abfd) \
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329 | ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info * 2)))
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330 |
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331 | #define hh_name(hh) \
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332 | (hh ? hh->eh.root.root.string : "<undef>")
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333 |
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334 | #define eh_name(eh) \
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335 | (eh ? eh->root.root.string : "<undef>")
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336 |
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337 | /* Assorted hash table functions. */
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338 |
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339 | /* Initialize an entry in the stub hash table. */
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340 |
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341 | static struct bfd_hash_entry *
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342 | stub_hash_newfunc (struct bfd_hash_entry *entry,
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343 | struct bfd_hash_table *table,
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344 | const char *string)
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345 | {
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346 | /* Allocate the structure if it has not already been allocated by a
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347 | subclass. */
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348 | if (entry == NULL)
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349 | {
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350 | entry = bfd_hash_allocate (table,
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351 | sizeof (struct elf32_hppa_stub_hash_entry));
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352 | if (entry == NULL)
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353 | return entry;
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354 | }
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355 |
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356 | /* Call the allocation method of the superclass. */
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357 | entry = bfd_hash_newfunc (entry, table, string);
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358 | if (entry != NULL)
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359 | {
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360 | struct elf32_hppa_stub_hash_entry *hsh;
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361 |
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362 | /* Initialize the local fields. */
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363 | hsh = hppa_stub_hash_entry (entry);
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364 | hsh->stub_sec = NULL;
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365 | hsh->stub_offset = 0;
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366 | hsh->target_value = 0;
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367 | hsh->target_section = NULL;
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368 | hsh->stub_type = hppa_stub_long_branch;
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369 | hsh->hh = NULL;
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370 | hsh->id_sec = NULL;
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371 | }
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372 |
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373 | return entry;
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374 | }
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375 |
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376 | /* Initialize an entry in the link hash table. */
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377 |
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378 | static struct bfd_hash_entry *
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379 | hppa_link_hash_newfunc (struct bfd_hash_entry *entry,
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380 | struct bfd_hash_table *table,
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381 | const char *string)
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382 | {
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383 | /* Allocate the structure if it has not already been allocated by a
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384 | subclass. */
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385 | if (entry == NULL)
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386 | {
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387 | entry = bfd_hash_allocate (table,
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388 | sizeof (struct elf32_hppa_link_hash_entry));
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389 | if (entry == NULL)
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390 | return entry;
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391 | }
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392 |
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393 | /* Call the allocation method of the superclass. */
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394 | entry = _bfd_elf_link_hash_newfunc (entry, table, string);
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395 | if (entry != NULL)
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396 | {
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397 | struct elf32_hppa_link_hash_entry *hh;
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398 |
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399 | /* Initialize the local fields. */
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400 | hh = hppa_elf_hash_entry (entry);
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401 | hh->hsh_cache = NULL;
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402 | hh->dyn_relocs = NULL;
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403 | hh->plabel = 0;
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404 | hh->tls_type = GOT_UNKNOWN;
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405 | }
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406 |
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407 | return entry;
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408 | }
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409 |
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410 | /* Free the derived linker hash table. */
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411 |
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412 | static void
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413 | elf32_hppa_link_hash_table_free (bfd *obfd)
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414 | {
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415 | struct elf32_hppa_link_hash_table *htab
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416 | = (struct elf32_hppa_link_hash_table *) obfd->link.hash;
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417 |
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418 | bfd_hash_table_free (&htab->bstab);
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419 | _bfd_elf_link_hash_table_free (obfd);
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420 | }
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421 |
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422 | /* Create the derived linker hash table. The PA ELF port uses the derived
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423 | hash table to keep information specific to the PA ELF linker (without
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424 | using static variables). */
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425 |
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426 | static struct bfd_link_hash_table *
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427 | elf32_hppa_link_hash_table_create (bfd *abfd)
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428 | {
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429 | struct elf32_hppa_link_hash_table *htab;
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430 | bfd_size_type amt = sizeof (*htab);
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431 |
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432 | htab = bfd_zmalloc (amt);
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433 | if (htab == NULL)
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434 | return NULL;
|
---|
435 |
|
---|
436 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, hppa_link_hash_newfunc,
|
---|
437 | sizeof (struct elf32_hppa_link_hash_entry),
|
---|
438 | HPPA32_ELF_DATA))
|
---|
439 | {
|
---|
440 | free (htab);
|
---|
441 | return NULL;
|
---|
442 | }
|
---|
443 |
|
---|
444 | /* Init the stub hash table too. */
|
---|
445 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
|
---|
446 | sizeof (struct elf32_hppa_stub_hash_entry)))
|
---|
447 | {
|
---|
448 | _bfd_elf_link_hash_table_free (abfd);
|
---|
449 | return NULL;
|
---|
450 | }
|
---|
451 | htab->etab.root.hash_table_free = elf32_hppa_link_hash_table_free;
|
---|
452 |
|
---|
453 | htab->text_segment_base = (bfd_vma) -1;
|
---|
454 | htab->data_segment_base = (bfd_vma) -1;
|
---|
455 | return &htab->etab.root;
|
---|
456 | }
|
---|
457 |
|
---|
458 | /* Initialize the linker stubs BFD so that we can use it for linker
|
---|
459 | created dynamic sections. */
|
---|
460 |
|
---|
461 | void
|
---|
462 | elf32_hppa_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
|
---|
463 | {
|
---|
464 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
|
---|
465 |
|
---|
466 | elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS32;
|
---|
467 | htab->etab.dynobj = abfd;
|
---|
468 | }
|
---|
469 |
|
---|
470 | /* Build a name for an entry in the stub hash table. */
|
---|
471 |
|
---|
472 | static char *
|
---|
473 | hppa_stub_name (const asection *input_section,
|
---|
474 | const asection *sym_sec,
|
---|
475 | const struct elf32_hppa_link_hash_entry *hh,
|
---|
476 | const Elf_Internal_Rela *rela)
|
---|
477 | {
|
---|
478 | char *stub_name;
|
---|
479 | bfd_size_type len;
|
---|
480 |
|
---|
481 | if (hh)
|
---|
482 | {
|
---|
483 | len = 8 + 1 + strlen (hh_name (hh)) + 1 + 8 + 1;
|
---|
484 | stub_name = bfd_malloc (len);
|
---|
485 | if (stub_name != NULL)
|
---|
486 | sprintf (stub_name, "%08x_%s+%x",
|
---|
487 | input_section->id & 0xffffffff,
|
---|
488 | hh_name (hh),
|
---|
489 | (int) rela->r_addend & 0xffffffff);
|
---|
490 | }
|
---|
491 | else
|
---|
492 | {
|
---|
493 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
|
---|
494 | stub_name = bfd_malloc (len);
|
---|
495 | if (stub_name != NULL)
|
---|
496 | sprintf (stub_name, "%08x_%x:%x+%x",
|
---|
497 | input_section->id & 0xffffffff,
|
---|
498 | sym_sec->id & 0xffffffff,
|
---|
499 | (int) ELF32_R_SYM (rela->r_info) & 0xffffffff,
|
---|
500 | (int) rela->r_addend & 0xffffffff);
|
---|
501 | }
|
---|
502 | return stub_name;
|
---|
503 | }
|
---|
504 |
|
---|
505 | /* Look up an entry in the stub hash. Stub entries are cached because
|
---|
506 | creating the stub name takes a bit of time. */
|
---|
507 |
|
---|
508 | static struct elf32_hppa_stub_hash_entry *
|
---|
509 | hppa_get_stub_entry (const asection *input_section,
|
---|
510 | const asection *sym_sec,
|
---|
511 | struct elf32_hppa_link_hash_entry *hh,
|
---|
512 | const Elf_Internal_Rela *rela,
|
---|
513 | struct elf32_hppa_link_hash_table *htab)
|
---|
514 | {
|
---|
515 | struct elf32_hppa_stub_hash_entry *hsh_entry;
|
---|
516 | const asection *id_sec;
|
---|
517 |
|
---|
518 | /* If this input section is part of a group of sections sharing one
|
---|
519 | stub section, then use the id of the first section in the group.
|
---|
520 | Stub names need to include a section id, as there may well be
|
---|
521 | more than one stub used to reach say, printf, and we need to
|
---|
522 | distinguish between them. */
|
---|
523 | id_sec = htab->stub_group[input_section->id].link_sec;
|
---|
524 |
|
---|
525 | if (hh != NULL && hh->hsh_cache != NULL
|
---|
526 | && hh->hsh_cache->hh == hh
|
---|
527 | && hh->hsh_cache->id_sec == id_sec)
|
---|
528 | {
|
---|
529 | hsh_entry = hh->hsh_cache;
|
---|
530 | }
|
---|
531 | else
|
---|
532 | {
|
---|
533 | char *stub_name;
|
---|
534 |
|
---|
535 | stub_name = hppa_stub_name (id_sec, sym_sec, hh, rela);
|
---|
536 | if (stub_name == NULL)
|
---|
537 | return NULL;
|
---|
538 |
|
---|
539 | hsh_entry = hppa_stub_hash_lookup (&htab->bstab,
|
---|
540 | stub_name, FALSE, FALSE);
|
---|
541 | if (hh != NULL)
|
---|
542 | hh->hsh_cache = hsh_entry;
|
---|
543 |
|
---|
544 | free (stub_name);
|
---|
545 | }
|
---|
546 |
|
---|
547 | return hsh_entry;
|
---|
548 | }
|
---|
549 |
|
---|
550 | /* Add a new stub entry to the stub hash. Not all fields of the new
|
---|
551 | stub entry are initialised. */
|
---|
552 |
|
---|
553 | static struct elf32_hppa_stub_hash_entry *
|
---|
554 | hppa_add_stub (const char *stub_name,
|
---|
555 | asection *section,
|
---|
556 | struct elf32_hppa_link_hash_table *htab)
|
---|
557 | {
|
---|
558 | asection *link_sec;
|
---|
559 | asection *stub_sec;
|
---|
560 | struct elf32_hppa_stub_hash_entry *hsh;
|
---|
561 |
|
---|
562 | link_sec = htab->stub_group[section->id].link_sec;
|
---|
563 | stub_sec = htab->stub_group[section->id].stub_sec;
|
---|
564 | if (stub_sec == NULL)
|
---|
565 | {
|
---|
566 | stub_sec = htab->stub_group[link_sec->id].stub_sec;
|
---|
567 | if (stub_sec == NULL)
|
---|
568 | {
|
---|
569 | size_t namelen;
|
---|
570 | bfd_size_type len;
|
---|
571 | char *s_name;
|
---|
572 |
|
---|
573 | namelen = strlen (link_sec->name);
|
---|
574 | len = namelen + sizeof (STUB_SUFFIX);
|
---|
575 | s_name = bfd_alloc (htab->stub_bfd, len);
|
---|
576 | if (s_name == NULL)
|
---|
577 | return NULL;
|
---|
578 |
|
---|
579 | memcpy (s_name, link_sec->name, namelen);
|
---|
580 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
|
---|
581 | stub_sec = (*htab->add_stub_section) (s_name, link_sec);
|
---|
582 | if (stub_sec == NULL)
|
---|
583 | return NULL;
|
---|
584 | htab->stub_group[link_sec->id].stub_sec = stub_sec;
|
---|
585 | }
|
---|
586 | htab->stub_group[section->id].stub_sec = stub_sec;
|
---|
587 | }
|
---|
588 |
|
---|
589 | /* Enter this entry into the linker stub hash table. */
|
---|
590 | hsh = hppa_stub_hash_lookup (&htab->bstab, stub_name,
|
---|
591 | TRUE, FALSE);
|
---|
592 | if (hsh == NULL)
|
---|
593 | {
|
---|
594 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
|
---|
595 | section->owner,
|
---|
596 | stub_name);
|
---|
597 | return NULL;
|
---|
598 | }
|
---|
599 |
|
---|
600 | hsh->stub_sec = stub_sec;
|
---|
601 | hsh->stub_offset = 0;
|
---|
602 | hsh->id_sec = link_sec;
|
---|
603 | return hsh;
|
---|
604 | }
|
---|
605 |
|
---|
606 | /* Determine the type of stub needed, if any, for a call. */
|
---|
607 |
|
---|
608 | static enum elf32_hppa_stub_type
|
---|
609 | hppa_type_of_stub (asection *input_sec,
|
---|
610 | const Elf_Internal_Rela *rela,
|
---|
611 | struct elf32_hppa_link_hash_entry *hh,
|
---|
612 | bfd_vma destination,
|
---|
613 | struct bfd_link_info *info)
|
---|
614 | {
|
---|
615 | bfd_vma location;
|
---|
616 | bfd_vma branch_offset;
|
---|
617 | bfd_vma max_branch_offset;
|
---|
618 | unsigned int r_type;
|
---|
619 |
|
---|
620 | if (hh != NULL
|
---|
621 | && hh->eh.plt.offset != (bfd_vma) -1
|
---|
622 | && hh->eh.dynindx != -1
|
---|
623 | && !hh->plabel
|
---|
624 | && (bfd_link_pic (info)
|
---|
625 | || !hh->eh.def_regular
|
---|
626 | || hh->eh.root.type == bfd_link_hash_defweak))
|
---|
627 | {
|
---|
628 | /* We need an import stub. Decide between hppa_stub_import
|
---|
629 | and hppa_stub_import_shared later. */
|
---|
630 | return hppa_stub_import;
|
---|
631 | }
|
---|
632 |
|
---|
633 | /* Determine where the call point is. */
|
---|
634 | location = (input_sec->output_offset
|
---|
635 | + input_sec->output_section->vma
|
---|
636 | + rela->r_offset);
|
---|
637 |
|
---|
638 | branch_offset = destination - location - 8;
|
---|
639 | r_type = ELF32_R_TYPE (rela->r_info);
|
---|
640 |
|
---|
641 | /* Determine if a long branch stub is needed. parisc branch offsets
|
---|
642 | are relative to the second instruction past the branch, ie. +8
|
---|
643 | bytes on from the branch instruction location. The offset is
|
---|
644 | signed and counts in units of 4 bytes. */
|
---|
645 | if (r_type == (unsigned int) R_PARISC_PCREL17F)
|
---|
646 | max_branch_offset = (1 << (17 - 1)) << 2;
|
---|
647 |
|
---|
648 | else if (r_type == (unsigned int) R_PARISC_PCREL12F)
|
---|
649 | max_branch_offset = (1 << (12 - 1)) << 2;
|
---|
650 |
|
---|
651 | else /* R_PARISC_PCREL22F. */
|
---|
652 | max_branch_offset = (1 << (22 - 1)) << 2;
|
---|
653 |
|
---|
654 | if (branch_offset + max_branch_offset >= 2*max_branch_offset)
|
---|
655 | return hppa_stub_long_branch;
|
---|
656 |
|
---|
657 | return hppa_stub_none;
|
---|
658 | }
|
---|
659 |
|
---|
660 | /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
|
---|
661 | IN_ARG contains the link info pointer. */
|
---|
662 |
|
---|
663 | #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */
|
---|
664 | #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */
|
---|
665 |
|
---|
666 | #define BL_R1 0xe8200000 /* b,l .+8,%r1 */
|
---|
667 | #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */
|
---|
668 | #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */
|
---|
669 |
|
---|
670 | #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */
|
---|
671 | #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */
|
---|
672 | #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */
|
---|
673 | #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */
|
---|
674 |
|
---|
675 | #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */
|
---|
676 | #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */
|
---|
677 |
|
---|
678 | #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */
|
---|
679 | #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */
|
---|
680 | #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */
|
---|
681 | #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */
|
---|
682 |
|
---|
683 | #define BL22_RP 0xe800a002 /* b,l,n XXX,%rp */
|
---|
684 | #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */
|
---|
685 | #define NOP 0x08000240 /* nop */
|
---|
686 | #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */
|
---|
687 | #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */
|
---|
688 | #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */
|
---|
689 |
|
---|
690 | #ifndef R19_STUBS
|
---|
691 | #define R19_STUBS 1
|
---|
692 | #endif
|
---|
693 |
|
---|
694 | #if R19_STUBS
|
---|
695 | #define LDW_R1_DLT LDW_R1_R19
|
---|
696 | #else
|
---|
697 | #define LDW_R1_DLT LDW_R1_DP
|
---|
698 | #endif
|
---|
699 |
|
---|
700 | static bfd_boolean
|
---|
701 | hppa_build_one_stub (struct bfd_hash_entry *bh, void *in_arg)
|
---|
702 | {
|
---|
703 | struct elf32_hppa_stub_hash_entry *hsh;
|
---|
704 | struct bfd_link_info *info;
|
---|
705 | struct elf32_hppa_link_hash_table *htab;
|
---|
706 | asection *stub_sec;
|
---|
707 | bfd *stub_bfd;
|
---|
708 | bfd_byte *loc;
|
---|
709 | bfd_vma sym_value;
|
---|
710 | bfd_vma insn;
|
---|
711 | bfd_vma off;
|
---|
712 | int val;
|
---|
713 | int size;
|
---|
714 |
|
---|
715 | /* Massage our args to the form they really have. */
|
---|
716 | hsh = hppa_stub_hash_entry (bh);
|
---|
717 | info = (struct bfd_link_info *)in_arg;
|
---|
718 |
|
---|
719 | htab = hppa_link_hash_table (info);
|
---|
720 | if (htab == NULL)
|
---|
721 | return FALSE;
|
---|
722 |
|
---|
723 | stub_sec = hsh->stub_sec;
|
---|
724 |
|
---|
725 | /* Make a note of the offset within the stubs for this entry. */
|
---|
726 | hsh->stub_offset = stub_sec->size;
|
---|
727 | loc = stub_sec->contents + hsh->stub_offset;
|
---|
728 |
|
---|
729 | stub_bfd = stub_sec->owner;
|
---|
730 |
|
---|
731 | switch (hsh->stub_type)
|
---|
732 | {
|
---|
733 | case hppa_stub_long_branch:
|
---|
734 | /* Create the long branch. A long branch is formed with "ldil"
|
---|
735 | loading the upper bits of the target address into a register,
|
---|
736 | then branching with "be" which adds in the lower bits.
|
---|
737 | The "be" has its delay slot nullified. */
|
---|
738 | sym_value = (hsh->target_value
|
---|
739 | + hsh->target_section->output_offset
|
---|
740 | + hsh->target_section->output_section->vma);
|
---|
741 |
|
---|
742 | val = hppa_field_adjust (sym_value, 0, e_lrsel);
|
---|
743 | insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21);
|
---|
744 | bfd_put_32 (stub_bfd, insn, loc);
|
---|
745 |
|
---|
746 | val = hppa_field_adjust (sym_value, 0, e_rrsel) >> 2;
|
---|
747 | insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
|
---|
748 | bfd_put_32 (stub_bfd, insn, loc + 4);
|
---|
749 |
|
---|
750 | size = 8;
|
---|
751 | break;
|
---|
752 |
|
---|
753 | case hppa_stub_long_branch_shared:
|
---|
754 | /* Branches are relative. This is where we are going to. */
|
---|
755 | sym_value = (hsh->target_value
|
---|
756 | + hsh->target_section->output_offset
|
---|
757 | + hsh->target_section->output_section->vma);
|
---|
758 |
|
---|
759 | /* And this is where we are coming from, more or less. */
|
---|
760 | sym_value -= (hsh->stub_offset
|
---|
761 | + stub_sec->output_offset
|
---|
762 | + stub_sec->output_section->vma);
|
---|
763 |
|
---|
764 | bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc);
|
---|
765 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel);
|
---|
766 | insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21);
|
---|
767 | bfd_put_32 (stub_bfd, insn, loc + 4);
|
---|
768 |
|
---|
769 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2;
|
---|
770 | insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
|
---|
771 | bfd_put_32 (stub_bfd, insn, loc + 8);
|
---|
772 | size = 12;
|
---|
773 | break;
|
---|
774 |
|
---|
775 | case hppa_stub_import:
|
---|
776 | case hppa_stub_import_shared:
|
---|
777 | off = hsh->hh->eh.plt.offset;
|
---|
778 | if (off >= (bfd_vma) -2)
|
---|
779 | abort ();
|
---|
780 |
|
---|
781 | off &= ~ (bfd_vma) 1;
|
---|
782 | sym_value = (off
|
---|
783 | + htab->splt->output_offset
|
---|
784 | + htab->splt->output_section->vma
|
---|
785 | - elf_gp (htab->splt->output_section->owner));
|
---|
786 |
|
---|
787 | insn = ADDIL_DP;
|
---|
788 | #if R19_STUBS
|
---|
789 | if (hsh->stub_type == hppa_stub_import_shared)
|
---|
790 | insn = ADDIL_R19;
|
---|
791 | #endif
|
---|
792 | val = hppa_field_adjust (sym_value, 0, e_lrsel),
|
---|
793 | insn = hppa_rebuild_insn ((int) insn, val, 21);
|
---|
794 | bfd_put_32 (stub_bfd, insn, loc);
|
---|
795 |
|
---|
796 | /* It is critical to use lrsel/rrsel here because we are using
|
---|
797 | two different offsets (+0 and +4) from sym_value. If we use
|
---|
798 | lsel/rsel then with unfortunate sym_values we will round
|
---|
799 | sym_value+4 up to the next 2k block leading to a mis-match
|
---|
800 | between the lsel and rsel value. */
|
---|
801 | val = hppa_field_adjust (sym_value, 0, e_rrsel);
|
---|
802 | insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14);
|
---|
803 | bfd_put_32 (stub_bfd, insn, loc + 4);
|
---|
804 |
|
---|
805 | if (htab->multi_subspace)
|
---|
806 | {
|
---|
807 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
|
---|
808 | insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
|
---|
809 | bfd_put_32 (stub_bfd, insn, loc + 8);
|
---|
810 |
|
---|
811 | bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12);
|
---|
812 | bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
|
---|
813 | bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20);
|
---|
814 | bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24);
|
---|
815 |
|
---|
816 | size = 28;
|
---|
817 | }
|
---|
818 | else
|
---|
819 | {
|
---|
820 | bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8);
|
---|
821 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
|
---|
822 | insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
|
---|
823 | bfd_put_32 (stub_bfd, insn, loc + 12);
|
---|
824 |
|
---|
825 | size = 16;
|
---|
826 | }
|
---|
827 |
|
---|
828 | break;
|
---|
829 |
|
---|
830 | case hppa_stub_export:
|
---|
831 | /* Branches are relative. This is where we are going to. */
|
---|
832 | sym_value = (hsh->target_value
|
---|
833 | + hsh->target_section->output_offset
|
---|
834 | + hsh->target_section->output_section->vma);
|
---|
835 |
|
---|
836 | /* And this is where we are coming from. */
|
---|
837 | sym_value -= (hsh->stub_offset
|
---|
838 | + stub_sec->output_offset
|
---|
839 | + stub_sec->output_section->vma);
|
---|
840 |
|
---|
841 | if (sym_value - 8 + (1 << (17 + 1)) >= (1 << (17 + 2))
|
---|
842 | && (!htab->has_22bit_branch
|
---|
843 | || sym_value - 8 + (1 << (22 + 1)) >= (1 << (22 + 2))))
|
---|
844 | {
|
---|
845 | (*_bfd_error_handler)
|
---|
846 | (_("%B(%A+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
|
---|
847 | hsh->target_section->owner,
|
---|
848 | stub_sec,
|
---|
849 | (long) hsh->stub_offset,
|
---|
850 | hsh->bh_root.string);
|
---|
851 | bfd_set_error (bfd_error_bad_value);
|
---|
852 | return FALSE;
|
---|
853 | }
|
---|
854 |
|
---|
855 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2;
|
---|
856 | if (!htab->has_22bit_branch)
|
---|
857 | insn = hppa_rebuild_insn ((int) BL_RP, val, 17);
|
---|
858 | else
|
---|
859 | insn = hppa_rebuild_insn ((int) BL22_RP, val, 22);
|
---|
860 | bfd_put_32 (stub_bfd, insn, loc);
|
---|
861 |
|
---|
862 | bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4);
|
---|
863 | bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8);
|
---|
864 | bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12);
|
---|
865 | bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
|
---|
866 | bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20);
|
---|
867 |
|
---|
868 | /* Point the function symbol at the stub. */
|
---|
869 | hsh->hh->eh.root.u.def.section = stub_sec;
|
---|
870 | hsh->hh->eh.root.u.def.value = stub_sec->size;
|
---|
871 |
|
---|
872 | size = 24;
|
---|
873 | break;
|
---|
874 |
|
---|
875 | default:
|
---|
876 | BFD_FAIL ();
|
---|
877 | return FALSE;
|
---|
878 | }
|
---|
879 |
|
---|
880 | stub_sec->size += size;
|
---|
881 | return TRUE;
|
---|
882 | }
|
---|
883 |
|
---|
884 | #undef LDIL_R1
|
---|
885 | #undef BE_SR4_R1
|
---|
886 | #undef BL_R1
|
---|
887 | #undef ADDIL_R1
|
---|
888 | #undef DEPI_R1
|
---|
889 | #undef LDW_R1_R21
|
---|
890 | #undef LDW_R1_DLT
|
---|
891 | #undef LDW_R1_R19
|
---|
892 | #undef ADDIL_R19
|
---|
893 | #undef LDW_R1_DP
|
---|
894 | #undef LDSID_R21_R1
|
---|
895 | #undef MTSP_R1
|
---|
896 | #undef BE_SR0_R21
|
---|
897 | #undef STW_RP
|
---|
898 | #undef BV_R0_R21
|
---|
899 | #undef BL_RP
|
---|
900 | #undef NOP
|
---|
901 | #undef LDW_RP
|
---|
902 | #undef LDSID_RP_R1
|
---|
903 | #undef BE_SR0_RP
|
---|
904 |
|
---|
905 | /* As above, but don't actually build the stub. Just bump offset so
|
---|
906 | we know stub section sizes. */
|
---|
907 |
|
---|
908 | static bfd_boolean
|
---|
909 | hppa_size_one_stub (struct bfd_hash_entry *bh, void *in_arg)
|
---|
910 | {
|
---|
911 | struct elf32_hppa_stub_hash_entry *hsh;
|
---|
912 | struct elf32_hppa_link_hash_table *htab;
|
---|
913 | int size;
|
---|
914 |
|
---|
915 | /* Massage our args to the form they really have. */
|
---|
916 | hsh = hppa_stub_hash_entry (bh);
|
---|
917 | htab = in_arg;
|
---|
918 |
|
---|
919 | if (hsh->stub_type == hppa_stub_long_branch)
|
---|
920 | size = 8;
|
---|
921 | else if (hsh->stub_type == hppa_stub_long_branch_shared)
|
---|
922 | size = 12;
|
---|
923 | else if (hsh->stub_type == hppa_stub_export)
|
---|
924 | size = 24;
|
---|
925 | else /* hppa_stub_import or hppa_stub_import_shared. */
|
---|
926 | {
|
---|
927 | if (htab->multi_subspace)
|
---|
928 | size = 28;
|
---|
929 | else
|
---|
930 | size = 16;
|
---|
931 | }
|
---|
932 |
|
---|
933 | hsh->stub_sec->size += size;
|
---|
934 | return TRUE;
|
---|
935 | }
|
---|
936 |
|
---|
937 | /* Return nonzero if ABFD represents an HPPA ELF32 file.
|
---|
938 | Additionally we set the default architecture and machine. */
|
---|
939 |
|
---|
940 | static bfd_boolean
|
---|
941 | elf32_hppa_object_p (bfd *abfd)
|
---|
942 | {
|
---|
943 | Elf_Internal_Ehdr * i_ehdrp;
|
---|
944 | unsigned int flags;
|
---|
945 |
|
---|
946 | i_ehdrp = elf_elfheader (abfd);
|
---|
947 | if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
|
---|
948 | {
|
---|
949 | /* GCC on hppa-linux produces binaries with OSABI=GNU,
|
---|
950 | but the kernel produces corefiles with OSABI=SysV. */
|
---|
951 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_GNU &&
|
---|
952 | i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NONE) /* aka SYSV */
|
---|
953 | return FALSE;
|
---|
954 | }
|
---|
955 | else if (strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") == 0)
|
---|
956 | {
|
---|
957 | /* GCC on hppa-netbsd produces binaries with OSABI=NetBSD,
|
---|
958 | but the kernel produces corefiles with OSABI=SysV. */
|
---|
959 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NETBSD &&
|
---|
960 | i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NONE) /* aka SYSV */
|
---|
961 | return FALSE;
|
---|
962 | }
|
---|
963 | else
|
---|
964 | {
|
---|
965 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX)
|
---|
966 | return FALSE;
|
---|
967 | }
|
---|
968 |
|
---|
969 | flags = i_ehdrp->e_flags;
|
---|
970 | switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE))
|
---|
971 | {
|
---|
972 | case EFA_PARISC_1_0:
|
---|
973 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10);
|
---|
974 | case EFA_PARISC_1_1:
|
---|
975 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11);
|
---|
976 | case EFA_PARISC_2_0:
|
---|
977 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20);
|
---|
978 | case EFA_PARISC_2_0 | EF_PARISC_WIDE:
|
---|
979 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25);
|
---|
980 | }
|
---|
981 | return TRUE;
|
---|
982 | }
|
---|
983 |
|
---|
984 | /* Create the .plt and .got sections, and set up our hash table
|
---|
985 | short-cuts to various dynamic sections. */
|
---|
986 |
|
---|
987 | static bfd_boolean
|
---|
988 | elf32_hppa_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
|
---|
989 | {
|
---|
990 | struct elf32_hppa_link_hash_table *htab;
|
---|
991 | struct elf_link_hash_entry *eh;
|
---|
992 |
|
---|
993 | /* Don't try to create the .plt and .got twice. */
|
---|
994 | htab = hppa_link_hash_table (info);
|
---|
995 | if (htab == NULL)
|
---|
996 | return FALSE;
|
---|
997 | if (htab->splt != NULL)
|
---|
998 | return TRUE;
|
---|
999 |
|
---|
1000 | /* Call the generic code to do most of the work. */
|
---|
1001 | if (! _bfd_elf_create_dynamic_sections (abfd, info))
|
---|
1002 | return FALSE;
|
---|
1003 |
|
---|
1004 | htab->splt = bfd_get_linker_section (abfd, ".plt");
|
---|
1005 | htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt");
|
---|
1006 |
|
---|
1007 | htab->sgot = bfd_get_linker_section (abfd, ".got");
|
---|
1008 | htab->srelgot = bfd_get_linker_section (abfd, ".rela.got");
|
---|
1009 |
|
---|
1010 | htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
|
---|
1011 | htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
|
---|
1012 |
|
---|
1013 | /* hppa-linux needs _GLOBAL_OFFSET_TABLE_ to be visible from the main
|
---|
1014 | application, because __canonicalize_funcptr_for_compare needs it. */
|
---|
1015 | eh = elf_hash_table (info)->hgot;
|
---|
1016 | eh->forced_local = 0;
|
---|
1017 | eh->other = STV_DEFAULT;
|
---|
1018 | return bfd_elf_link_record_dynamic_symbol (info, eh);
|
---|
1019 | }
|
---|
1020 |
|
---|
1021 | /* Copy the extra info we tack onto an elf_link_hash_entry. */
|
---|
1022 |
|
---|
1023 | static void
|
---|
1024 | elf32_hppa_copy_indirect_symbol (struct bfd_link_info *info,
|
---|
1025 | struct elf_link_hash_entry *eh_dir,
|
---|
1026 | struct elf_link_hash_entry *eh_ind)
|
---|
1027 | {
|
---|
1028 | struct elf32_hppa_link_hash_entry *hh_dir, *hh_ind;
|
---|
1029 |
|
---|
1030 | hh_dir = hppa_elf_hash_entry (eh_dir);
|
---|
1031 | hh_ind = hppa_elf_hash_entry (eh_ind);
|
---|
1032 |
|
---|
1033 | if (hh_ind->dyn_relocs != NULL)
|
---|
1034 | {
|
---|
1035 | if (hh_dir->dyn_relocs != NULL)
|
---|
1036 | {
|
---|
1037 | struct elf32_hppa_dyn_reloc_entry **hdh_pp;
|
---|
1038 | struct elf32_hppa_dyn_reloc_entry *hdh_p;
|
---|
1039 |
|
---|
1040 | /* Add reloc counts against the indirect sym to the direct sym
|
---|
1041 | list. Merge any entries against the same section. */
|
---|
1042 | for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
|
---|
1043 | {
|
---|
1044 | struct elf32_hppa_dyn_reloc_entry *hdh_q;
|
---|
1045 |
|
---|
1046 | for (hdh_q = hh_dir->dyn_relocs;
|
---|
1047 | hdh_q != NULL;
|
---|
1048 | hdh_q = hdh_q->hdh_next)
|
---|
1049 | if (hdh_q->sec == hdh_p->sec)
|
---|
1050 | {
|
---|
1051 | #if RELATIVE_DYNRELOCS
|
---|
1052 | hdh_q->relative_count += hdh_p->relative_count;
|
---|
1053 | #endif
|
---|
1054 | hdh_q->count += hdh_p->count;
|
---|
1055 | *hdh_pp = hdh_p->hdh_next;
|
---|
1056 | break;
|
---|
1057 | }
|
---|
1058 | if (hdh_q == NULL)
|
---|
1059 | hdh_pp = &hdh_p->hdh_next;
|
---|
1060 | }
|
---|
1061 | *hdh_pp = hh_dir->dyn_relocs;
|
---|
1062 | }
|
---|
1063 |
|
---|
1064 | hh_dir->dyn_relocs = hh_ind->dyn_relocs;
|
---|
1065 | hh_ind->dyn_relocs = NULL;
|
---|
1066 | }
|
---|
1067 |
|
---|
1068 | if (ELIMINATE_COPY_RELOCS
|
---|
1069 | && eh_ind->root.type != bfd_link_hash_indirect
|
---|
1070 | && eh_dir->dynamic_adjusted)
|
---|
1071 | {
|
---|
1072 | /* If called to transfer flags for a weakdef during processing
|
---|
1073 | of elf_adjust_dynamic_symbol, don't copy non_got_ref.
|
---|
1074 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */
|
---|
1075 | eh_dir->ref_dynamic |= eh_ind->ref_dynamic;
|
---|
1076 | eh_dir->ref_regular |= eh_ind->ref_regular;
|
---|
1077 | eh_dir->ref_regular_nonweak |= eh_ind->ref_regular_nonweak;
|
---|
1078 | eh_dir->needs_plt |= eh_ind->needs_plt;
|
---|
1079 | }
|
---|
1080 | else
|
---|
1081 | {
|
---|
1082 | if (eh_ind->root.type == bfd_link_hash_indirect
|
---|
1083 | && eh_dir->got.refcount <= 0)
|
---|
1084 | {
|
---|
1085 | hh_dir->tls_type = hh_ind->tls_type;
|
---|
1086 | hh_ind->tls_type = GOT_UNKNOWN;
|
---|
1087 | }
|
---|
1088 |
|
---|
1089 | _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
|
---|
1090 | }
|
---|
1091 | }
|
---|
1092 |
|
---|
1093 | static int
|
---|
1094 | elf32_hppa_optimized_tls_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
---|
1095 | int r_type, int is_local ATTRIBUTE_UNUSED)
|
---|
1096 | {
|
---|
1097 | /* For now we don't support linker optimizations. */
|
---|
1098 | return r_type;
|
---|
1099 | }
|
---|
1100 |
|
---|
1101 | /* Return a pointer to the local GOT, PLT and TLS reference counts
|
---|
1102 | for ABFD. Returns NULL if the storage allocation fails. */
|
---|
1103 |
|
---|
1104 | static bfd_signed_vma *
|
---|
1105 | hppa32_elf_local_refcounts (bfd *abfd)
|
---|
1106 | {
|
---|
1107 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
---|
1108 | bfd_signed_vma *local_refcounts;
|
---|
1109 |
|
---|
1110 | local_refcounts = elf_local_got_refcounts (abfd);
|
---|
1111 | if (local_refcounts == NULL)
|
---|
1112 | {
|
---|
1113 | bfd_size_type size;
|
---|
1114 |
|
---|
1115 | /* Allocate space for local GOT and PLT reference
|
---|
1116 | counts. Done this way to save polluting elf_obj_tdata
|
---|
1117 | with another target specific pointer. */
|
---|
1118 | size = symtab_hdr->sh_info;
|
---|
1119 | size *= 2 * sizeof (bfd_signed_vma);
|
---|
1120 | /* Add in space to store the local GOT TLS types. */
|
---|
1121 | size += symtab_hdr->sh_info;
|
---|
1122 | local_refcounts = bfd_zalloc (abfd, size);
|
---|
1123 | if (local_refcounts == NULL)
|
---|
1124 | return NULL;
|
---|
1125 | elf_local_got_refcounts (abfd) = local_refcounts;
|
---|
1126 | memset (hppa_elf_local_got_tls_type (abfd), GOT_UNKNOWN,
|
---|
1127 | symtab_hdr->sh_info);
|
---|
1128 | }
|
---|
1129 | return local_refcounts;
|
---|
1130 | }
|
---|
1131 |
|
---|
1132 |
|
---|
1133 | /* Look through the relocs for a section during the first phase, and
|
---|
1134 | calculate needed space in the global offset table, procedure linkage
|
---|
1135 | table, and dynamic reloc sections. At this point we haven't
|
---|
1136 | necessarily read all the input files. */
|
---|
1137 |
|
---|
1138 | static bfd_boolean
|
---|
1139 | elf32_hppa_check_relocs (bfd *abfd,
|
---|
1140 | struct bfd_link_info *info,
|
---|
1141 | asection *sec,
|
---|
1142 | const Elf_Internal_Rela *relocs)
|
---|
1143 | {
|
---|
1144 | Elf_Internal_Shdr *symtab_hdr;
|
---|
1145 | struct elf_link_hash_entry **eh_syms;
|
---|
1146 | const Elf_Internal_Rela *rela;
|
---|
1147 | const Elf_Internal_Rela *rela_end;
|
---|
1148 | struct elf32_hppa_link_hash_table *htab;
|
---|
1149 | asection *sreloc;
|
---|
1150 | int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
|
---|
1151 |
|
---|
1152 | if (bfd_link_relocatable (info))
|
---|
1153 | return TRUE;
|
---|
1154 |
|
---|
1155 | htab = hppa_link_hash_table (info);
|
---|
1156 | if (htab == NULL)
|
---|
1157 | return FALSE;
|
---|
1158 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
---|
1159 | eh_syms = elf_sym_hashes (abfd);
|
---|
1160 | sreloc = NULL;
|
---|
1161 |
|
---|
1162 | rela_end = relocs + sec->reloc_count;
|
---|
1163 | for (rela = relocs; rela < rela_end; rela++)
|
---|
1164 | {
|
---|
1165 | enum {
|
---|
1166 | NEED_GOT = 1,
|
---|
1167 | NEED_PLT = 2,
|
---|
1168 | NEED_DYNREL = 4,
|
---|
1169 | PLT_PLABEL = 8
|
---|
1170 | };
|
---|
1171 |
|
---|
1172 | unsigned int r_symndx, r_type;
|
---|
1173 | struct elf32_hppa_link_hash_entry *hh;
|
---|
1174 | int need_entry = 0;
|
---|
1175 |
|
---|
1176 | r_symndx = ELF32_R_SYM (rela->r_info);
|
---|
1177 |
|
---|
1178 | if (r_symndx < symtab_hdr->sh_info)
|
---|
1179 | hh = NULL;
|
---|
1180 | else
|
---|
1181 | {
|
---|
1182 | hh = hppa_elf_hash_entry (eh_syms[r_symndx - symtab_hdr->sh_info]);
|
---|
1183 | while (hh->eh.root.type == bfd_link_hash_indirect
|
---|
1184 | || hh->eh.root.type == bfd_link_hash_warning)
|
---|
1185 | hh = hppa_elf_hash_entry (hh->eh.root.u.i.link);
|
---|
1186 |
|
---|
1187 | /* PR15323, ref flags aren't set for references in the same
|
---|
1188 | object. */
|
---|
1189 | hh->eh.root.non_ir_ref = 1;
|
---|
1190 | }
|
---|
1191 |
|
---|
1192 | r_type = ELF32_R_TYPE (rela->r_info);
|
---|
1193 | r_type = elf32_hppa_optimized_tls_reloc (info, r_type, hh == NULL);
|
---|
1194 |
|
---|
1195 | switch (r_type)
|
---|
1196 | {
|
---|
1197 | case R_PARISC_DLTIND14F:
|
---|
1198 | case R_PARISC_DLTIND14R:
|
---|
1199 | case R_PARISC_DLTIND21L:
|
---|
1200 | /* This symbol requires a global offset table entry. */
|
---|
1201 | need_entry = NEED_GOT;
|
---|
1202 | break;
|
---|
1203 |
|
---|
1204 | case R_PARISC_PLABEL14R: /* "Official" procedure labels. */
|
---|
1205 | case R_PARISC_PLABEL21L:
|
---|
1206 | case R_PARISC_PLABEL32:
|
---|
1207 | /* If the addend is non-zero, we break badly. */
|
---|
1208 | if (rela->r_addend != 0)
|
---|
1209 | abort ();
|
---|
1210 |
|
---|
1211 | /* If we are creating a shared library, then we need to
|
---|
1212 | create a PLT entry for all PLABELs, because PLABELs with
|
---|
1213 | local symbols may be passed via a pointer to another
|
---|
1214 | object. Additionally, output a dynamic relocation
|
---|
1215 | pointing to the PLT entry.
|
---|
1216 |
|
---|
1217 | For executables, the original 32-bit ABI allowed two
|
---|
1218 | different styles of PLABELs (function pointers): For
|
---|
1219 | global functions, the PLABEL word points into the .plt
|
---|
1220 | two bytes past a (function address, gp) pair, and for
|
---|
1221 | local functions the PLABEL points directly at the
|
---|
1222 | function. The magic +2 for the first type allows us to
|
---|
1223 | differentiate between the two. As you can imagine, this
|
---|
1224 | is a real pain when it comes to generating code to call
|
---|
1225 | functions indirectly or to compare function pointers.
|
---|
1226 | We avoid the mess by always pointing a PLABEL into the
|
---|
1227 | .plt, even for local functions. */
|
---|
1228 | need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL;
|
---|
1229 | break;
|
---|
1230 |
|
---|
1231 | case R_PARISC_PCREL12F:
|
---|
1232 | htab->has_12bit_branch = 1;
|
---|
1233 | goto branch_common;
|
---|
1234 |
|
---|
1235 | case R_PARISC_PCREL17C:
|
---|
1236 | case R_PARISC_PCREL17F:
|
---|
1237 | htab->has_17bit_branch = 1;
|
---|
1238 | goto branch_common;
|
---|
1239 |
|
---|
1240 | case R_PARISC_PCREL22F:
|
---|
1241 | htab->has_22bit_branch = 1;
|
---|
1242 | branch_common:
|
---|
1243 | /* Function calls might need to go through the .plt, and
|
---|
1244 | might require long branch stubs. */
|
---|
1245 | if (hh == NULL)
|
---|
1246 | {
|
---|
1247 | /* We know local syms won't need a .plt entry, and if
|
---|
1248 | they need a long branch stub we can't guarantee that
|
---|
1249 | we can reach the stub. So just flag an error later
|
---|
1250 | if we're doing a shared link and find we need a long
|
---|
1251 | branch stub. */
|
---|
1252 | continue;
|
---|
1253 | }
|
---|
1254 | else
|
---|
1255 | {
|
---|
1256 | /* Global symbols will need a .plt entry if they remain
|
---|
1257 | global, and in most cases won't need a long branch
|
---|
1258 | stub. Unfortunately, we have to cater for the case
|
---|
1259 | where a symbol is forced local by versioning, or due
|
---|
1260 | to symbolic linking, and we lose the .plt entry. */
|
---|
1261 | need_entry = NEED_PLT;
|
---|
1262 | if (hh->eh.type == STT_PARISC_MILLI)
|
---|
1263 | need_entry = 0;
|
---|
1264 | }
|
---|
1265 | break;
|
---|
1266 |
|
---|
1267 | case R_PARISC_SEGBASE: /* Used to set segment base. */
|
---|
1268 | case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */
|
---|
1269 | case R_PARISC_PCREL14F: /* PC relative load/store. */
|
---|
1270 | case R_PARISC_PCREL14R:
|
---|
1271 | case R_PARISC_PCREL17R: /* External branches. */
|
---|
1272 | case R_PARISC_PCREL21L: /* As above, and for load/store too. */
|
---|
1273 | case R_PARISC_PCREL32:
|
---|
1274 | /* We don't need to propagate the relocation if linking a
|
---|
1275 | shared object since these are section relative. */
|
---|
1276 | continue;
|
---|
1277 |
|
---|
1278 | case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */
|
---|
1279 | case R_PARISC_DPREL14R:
|
---|
1280 | case R_PARISC_DPREL21L:
|
---|
1281 | if (bfd_link_pic (info))
|
---|
1282 | {
|
---|
1283 | (*_bfd_error_handler)
|
---|
1284 | (_("%B: relocation %s can not be used when making a shared object; recompile with -fPIC"),
|
---|
1285 | abfd,
|
---|
1286 | elf_hppa_howto_table[r_type].name);
|
---|
1287 | bfd_set_error (bfd_error_bad_value);
|
---|
1288 | return FALSE;
|
---|
1289 | }
|
---|
1290 | /* Fall through. */
|
---|
1291 |
|
---|
1292 | case R_PARISC_DIR17F: /* Used for external branches. */
|
---|
1293 | case R_PARISC_DIR17R:
|
---|
1294 | case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */
|
---|
1295 | case R_PARISC_DIR14R:
|
---|
1296 | case R_PARISC_DIR21L: /* As above, and for ext branches too. */
|
---|
1297 | case R_PARISC_DIR32: /* .word relocs. */
|
---|
1298 | /* We may want to output a dynamic relocation later. */
|
---|
1299 | need_entry = NEED_DYNREL;
|
---|
1300 | break;
|
---|
1301 |
|
---|
1302 | /* This relocation describes the C++ object vtable hierarchy.
|
---|
1303 | Reconstruct it for later use during GC. */
|
---|
1304 | case R_PARISC_GNU_VTINHERIT:
|
---|
1305 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh, rela->r_offset))
|
---|
1306 | return FALSE;
|
---|
1307 | continue;
|
---|
1308 |
|
---|
1309 | /* This relocation describes which C++ vtable entries are actually
|
---|
1310 | used. Record for later use during GC. */
|
---|
1311 | case R_PARISC_GNU_VTENTRY:
|
---|
1312 | BFD_ASSERT (hh != NULL);
|
---|
1313 | if (hh != NULL
|
---|
1314 | && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rela->r_addend))
|
---|
1315 | return FALSE;
|
---|
1316 | continue;
|
---|
1317 |
|
---|
1318 | case R_PARISC_TLS_GD21L:
|
---|
1319 | case R_PARISC_TLS_GD14R:
|
---|
1320 | case R_PARISC_TLS_LDM21L:
|
---|
1321 | case R_PARISC_TLS_LDM14R:
|
---|
1322 | need_entry = NEED_GOT;
|
---|
1323 | break;
|
---|
1324 |
|
---|
1325 | case R_PARISC_TLS_IE21L:
|
---|
1326 | case R_PARISC_TLS_IE14R:
|
---|
1327 | if (bfd_link_pic (info))
|
---|
1328 | info->flags |= DF_STATIC_TLS;
|
---|
1329 | need_entry = NEED_GOT;
|
---|
1330 | break;
|
---|
1331 |
|
---|
1332 | default:
|
---|
1333 | continue;
|
---|
1334 | }
|
---|
1335 |
|
---|
1336 | /* Now carry out our orders. */
|
---|
1337 | if (need_entry & NEED_GOT)
|
---|
1338 | {
|
---|
1339 | switch (r_type)
|
---|
1340 | {
|
---|
1341 | default:
|
---|
1342 | tls_type = GOT_NORMAL;
|
---|
1343 | break;
|
---|
1344 | case R_PARISC_TLS_GD21L:
|
---|
1345 | case R_PARISC_TLS_GD14R:
|
---|
1346 | tls_type |= GOT_TLS_GD;
|
---|
1347 | break;
|
---|
1348 | case R_PARISC_TLS_LDM21L:
|
---|
1349 | case R_PARISC_TLS_LDM14R:
|
---|
1350 | tls_type |= GOT_TLS_LDM;
|
---|
1351 | break;
|
---|
1352 | case R_PARISC_TLS_IE21L:
|
---|
1353 | case R_PARISC_TLS_IE14R:
|
---|
1354 | tls_type |= GOT_TLS_IE;
|
---|
1355 | break;
|
---|
1356 | }
|
---|
1357 |
|
---|
1358 | /* Allocate space for a GOT entry, as well as a dynamic
|
---|
1359 | relocation for this entry. */
|
---|
1360 | if (htab->sgot == NULL)
|
---|
1361 | {
|
---|
1362 | if (!elf32_hppa_create_dynamic_sections (htab->etab.dynobj, info))
|
---|
1363 | return FALSE;
|
---|
1364 | }
|
---|
1365 |
|
---|
1366 | if (r_type == R_PARISC_TLS_LDM21L
|
---|
1367 | || r_type == R_PARISC_TLS_LDM14R)
|
---|
1368 | htab->tls_ldm_got.refcount += 1;
|
---|
1369 | else
|
---|
1370 | {
|
---|
1371 | if (hh != NULL)
|
---|
1372 | {
|
---|
1373 | hh->eh.got.refcount += 1;
|
---|
1374 | old_tls_type = hh->tls_type;
|
---|
1375 | }
|
---|
1376 | else
|
---|
1377 | {
|
---|
1378 | bfd_signed_vma *local_got_refcounts;
|
---|
1379 |
|
---|
1380 | /* This is a global offset table entry for a local symbol. */
|
---|
1381 | local_got_refcounts = hppa32_elf_local_refcounts (abfd);
|
---|
1382 | if (local_got_refcounts == NULL)
|
---|
1383 | return FALSE;
|
---|
1384 | local_got_refcounts[r_symndx] += 1;
|
---|
1385 |
|
---|
1386 | old_tls_type = hppa_elf_local_got_tls_type (abfd) [r_symndx];
|
---|
1387 | }
|
---|
1388 |
|
---|
1389 | tls_type |= old_tls_type;
|
---|
1390 |
|
---|
1391 | if (old_tls_type != tls_type)
|
---|
1392 | {
|
---|
1393 | if (hh != NULL)
|
---|
1394 | hh->tls_type = tls_type;
|
---|
1395 | else
|
---|
1396 | hppa_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
|
---|
1397 | }
|
---|
1398 |
|
---|
1399 | }
|
---|
1400 | }
|
---|
1401 |
|
---|
1402 | if (need_entry & NEED_PLT)
|
---|
1403 | {
|
---|
1404 | /* If we are creating a shared library, and this is a reloc
|
---|
1405 | against a weak symbol or a global symbol in a dynamic
|
---|
1406 | object, then we will be creating an import stub and a
|
---|
1407 | .plt entry for the symbol. Similarly, on a normal link
|
---|
1408 | to symbols defined in a dynamic object we'll need the
|
---|
1409 | import stub and a .plt entry. We don't know yet whether
|
---|
1410 | the symbol is defined or not, so make an entry anyway and
|
---|
1411 | clean up later in adjust_dynamic_symbol. */
|
---|
1412 | if ((sec->flags & SEC_ALLOC) != 0)
|
---|
1413 | {
|
---|
1414 | if (hh != NULL)
|
---|
1415 | {
|
---|
1416 | hh->eh.needs_plt = 1;
|
---|
1417 | hh->eh.plt.refcount += 1;
|
---|
1418 |
|
---|
1419 | /* If this .plt entry is for a plabel, mark it so
|
---|
1420 | that adjust_dynamic_symbol will keep the entry
|
---|
1421 | even if it appears to be local. */
|
---|
1422 | if (need_entry & PLT_PLABEL)
|
---|
1423 | hh->plabel = 1;
|
---|
1424 | }
|
---|
1425 | else if (need_entry & PLT_PLABEL)
|
---|
1426 | {
|
---|
1427 | bfd_signed_vma *local_got_refcounts;
|
---|
1428 | bfd_signed_vma *local_plt_refcounts;
|
---|
1429 |
|
---|
1430 | local_got_refcounts = hppa32_elf_local_refcounts (abfd);
|
---|
1431 | if (local_got_refcounts == NULL)
|
---|
1432 | return FALSE;
|
---|
1433 | local_plt_refcounts = (local_got_refcounts
|
---|
1434 | + symtab_hdr->sh_info);
|
---|
1435 | local_plt_refcounts[r_symndx] += 1;
|
---|
1436 | }
|
---|
1437 | }
|
---|
1438 | }
|
---|
1439 |
|
---|
1440 | if (need_entry & NEED_DYNREL)
|
---|
1441 | {
|
---|
1442 | /* Flag this symbol as having a non-got, non-plt reference
|
---|
1443 | so that we generate copy relocs if it turns out to be
|
---|
1444 | dynamic. */
|
---|
1445 | if (hh != NULL && !bfd_link_pic (info))
|
---|
1446 | hh->eh.non_got_ref = 1;
|
---|
1447 |
|
---|
1448 | /* If we are creating a shared library then we need to copy
|
---|
1449 | the reloc into the shared library. However, if we are
|
---|
1450 | linking with -Bsymbolic, we need only copy absolute
|
---|
1451 | relocs or relocs against symbols that are not defined in
|
---|
1452 | an object we are including in the link. PC- or DP- or
|
---|
1453 | DLT-relative relocs against any local sym or global sym
|
---|
1454 | with DEF_REGULAR set, can be discarded. At this point we
|
---|
1455 | have not seen all the input files, so it is possible that
|
---|
1456 | DEF_REGULAR is not set now but will be set later (it is
|
---|
1457 | never cleared). We account for that possibility below by
|
---|
1458 | storing information in the dyn_relocs field of the
|
---|
1459 | hash table entry.
|
---|
1460 |
|
---|
1461 | A similar situation to the -Bsymbolic case occurs when
|
---|
1462 | creating shared libraries and symbol visibility changes
|
---|
1463 | render the symbol local.
|
---|
1464 |
|
---|
1465 | As it turns out, all the relocs we will be creating here
|
---|
1466 | are absolute, so we cannot remove them on -Bsymbolic
|
---|
1467 | links or visibility changes anyway. A STUB_REL reloc
|
---|
1468 | is absolute too, as in that case it is the reloc in the
|
---|
1469 | stub we will be creating, rather than copying the PCREL
|
---|
1470 | reloc in the branch.
|
---|
1471 |
|
---|
1472 | If on the other hand, we are creating an executable, we
|
---|
1473 | may need to keep relocations for symbols satisfied by a
|
---|
1474 | dynamic library if we manage to avoid copy relocs for the
|
---|
1475 | symbol. */
|
---|
1476 | if ((bfd_link_pic (info)
|
---|
1477 | && (sec->flags & SEC_ALLOC) != 0
|
---|
1478 | && (IS_ABSOLUTE_RELOC (r_type)
|
---|
1479 | || (hh != NULL
|
---|
1480 | && (!SYMBOLIC_BIND (info, &hh->eh)
|
---|
1481 | || hh->eh.root.type == bfd_link_hash_defweak
|
---|
1482 | || !hh->eh.def_regular))))
|
---|
1483 | || (ELIMINATE_COPY_RELOCS
|
---|
1484 | && !bfd_link_pic (info)
|
---|
1485 | && (sec->flags & SEC_ALLOC) != 0
|
---|
1486 | && hh != NULL
|
---|
1487 | && (hh->eh.root.type == bfd_link_hash_defweak
|
---|
1488 | || !hh->eh.def_regular)))
|
---|
1489 | {
|
---|
1490 | struct elf32_hppa_dyn_reloc_entry *hdh_p;
|
---|
1491 | struct elf32_hppa_dyn_reloc_entry **hdh_head;
|
---|
1492 |
|
---|
1493 | /* Create a reloc section in dynobj and make room for
|
---|
1494 | this reloc. */
|
---|
1495 | if (sreloc == NULL)
|
---|
1496 | {
|
---|
1497 | sreloc = _bfd_elf_make_dynamic_reloc_section
|
---|
1498 | (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
|
---|
1499 |
|
---|
1500 | if (sreloc == NULL)
|
---|
1501 | {
|
---|
1502 | bfd_set_error (bfd_error_bad_value);
|
---|
1503 | return FALSE;
|
---|
1504 | }
|
---|
1505 | }
|
---|
1506 |
|
---|
1507 | /* If this is a global symbol, we count the number of
|
---|
1508 | relocations we need for this symbol. */
|
---|
1509 | if (hh != NULL)
|
---|
1510 | {
|
---|
1511 | hdh_head = &hh->dyn_relocs;
|
---|
1512 | }
|
---|
1513 | else
|
---|
1514 | {
|
---|
1515 | /* Track dynamic relocs needed for local syms too.
|
---|
1516 | We really need local syms available to do this
|
---|
1517 | easily. Oh well. */
|
---|
1518 | asection *sr;
|
---|
1519 | void *vpp;
|
---|
1520 | Elf_Internal_Sym *isym;
|
---|
1521 |
|
---|
1522 | isym = bfd_sym_from_r_symndx (&htab->sym_cache,
|
---|
1523 | abfd, r_symndx);
|
---|
1524 | if (isym == NULL)
|
---|
1525 | return FALSE;
|
---|
1526 |
|
---|
1527 | sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
---|
1528 | if (sr == NULL)
|
---|
1529 | sr = sec;
|
---|
1530 |
|
---|
1531 | vpp = &elf_section_data (sr)->local_dynrel;
|
---|
1532 | hdh_head = (struct elf32_hppa_dyn_reloc_entry **) vpp;
|
---|
1533 | }
|
---|
1534 |
|
---|
1535 | hdh_p = *hdh_head;
|
---|
1536 | if (hdh_p == NULL || hdh_p->sec != sec)
|
---|
1537 | {
|
---|
1538 | hdh_p = bfd_alloc (htab->etab.dynobj, sizeof *hdh_p);
|
---|
1539 | if (hdh_p == NULL)
|
---|
1540 | return FALSE;
|
---|
1541 | hdh_p->hdh_next = *hdh_head;
|
---|
1542 | *hdh_head = hdh_p;
|
---|
1543 | hdh_p->sec = sec;
|
---|
1544 | hdh_p->count = 0;
|
---|
1545 | #if RELATIVE_DYNRELOCS
|
---|
1546 | hdh_p->relative_count = 0;
|
---|
1547 | #endif
|
---|
1548 | }
|
---|
1549 |
|
---|
1550 | hdh_p->count += 1;
|
---|
1551 | #if RELATIVE_DYNRELOCS
|
---|
1552 | if (!IS_ABSOLUTE_RELOC (rtype))
|
---|
1553 | hdh_p->relative_count += 1;
|
---|
1554 | #endif
|
---|
1555 | }
|
---|
1556 | }
|
---|
1557 | }
|
---|
1558 |
|
---|
1559 | return TRUE;
|
---|
1560 | }
|
---|
1561 |
|
---|
1562 | /* Return the section that should be marked against garbage collection
|
---|
1563 | for a given relocation. */
|
---|
1564 |
|
---|
1565 | static asection *
|
---|
1566 | elf32_hppa_gc_mark_hook (asection *sec,
|
---|
1567 | struct bfd_link_info *info,
|
---|
1568 | Elf_Internal_Rela *rela,
|
---|
1569 | struct elf_link_hash_entry *hh,
|
---|
1570 | Elf_Internal_Sym *sym)
|
---|
1571 | {
|
---|
1572 | if (hh != NULL)
|
---|
1573 | switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
|
---|
1574 | {
|
---|
1575 | case R_PARISC_GNU_VTINHERIT:
|
---|
1576 | case R_PARISC_GNU_VTENTRY:
|
---|
1577 | return NULL;
|
---|
1578 | }
|
---|
1579 |
|
---|
1580 | return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
|
---|
1581 | }
|
---|
1582 |
|
---|
1583 | /* Update the got and plt entry reference counts for the section being
|
---|
1584 | removed. */
|
---|
1585 |
|
---|
1586 | static bfd_boolean
|
---|
1587 | elf32_hppa_gc_sweep_hook (bfd *abfd,
|
---|
1588 | struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
---|
1589 | asection *sec,
|
---|
1590 | const Elf_Internal_Rela *relocs)
|
---|
1591 | {
|
---|
1592 | Elf_Internal_Shdr *symtab_hdr;
|
---|
1593 | struct elf_link_hash_entry **eh_syms;
|
---|
1594 | bfd_signed_vma *local_got_refcounts;
|
---|
1595 | bfd_signed_vma *local_plt_refcounts;
|
---|
1596 | const Elf_Internal_Rela *rela, *relend;
|
---|
1597 | struct elf32_hppa_link_hash_table *htab;
|
---|
1598 |
|
---|
1599 | if (bfd_link_relocatable (info))
|
---|
1600 | return TRUE;
|
---|
1601 |
|
---|
1602 | htab = hppa_link_hash_table (info);
|
---|
1603 | if (htab == NULL)
|
---|
1604 | return FALSE;
|
---|
1605 |
|
---|
1606 | elf_section_data (sec)->local_dynrel = NULL;
|
---|
1607 |
|
---|
1608 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
---|
1609 | eh_syms = elf_sym_hashes (abfd);
|
---|
1610 | local_got_refcounts = elf_local_got_refcounts (abfd);
|
---|
1611 | local_plt_refcounts = local_got_refcounts;
|
---|
1612 | if (local_plt_refcounts != NULL)
|
---|
1613 | local_plt_refcounts += symtab_hdr->sh_info;
|
---|
1614 |
|
---|
1615 | relend = relocs + sec->reloc_count;
|
---|
1616 | for (rela = relocs; rela < relend; rela++)
|
---|
1617 | {
|
---|
1618 | unsigned long r_symndx;
|
---|
1619 | unsigned int r_type;
|
---|
1620 | struct elf_link_hash_entry *eh = NULL;
|
---|
1621 |
|
---|
1622 | r_symndx = ELF32_R_SYM (rela->r_info);
|
---|
1623 | if (r_symndx >= symtab_hdr->sh_info)
|
---|
1624 | {
|
---|
1625 | struct elf32_hppa_link_hash_entry *hh;
|
---|
1626 | struct elf32_hppa_dyn_reloc_entry **hdh_pp;
|
---|
1627 | struct elf32_hppa_dyn_reloc_entry *hdh_p;
|
---|
1628 |
|
---|
1629 | eh = eh_syms[r_symndx - symtab_hdr->sh_info];
|
---|
1630 | while (eh->root.type == bfd_link_hash_indirect
|
---|
1631 | || eh->root.type == bfd_link_hash_warning)
|
---|
1632 | eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
|
---|
1633 | hh = hppa_elf_hash_entry (eh);
|
---|
1634 |
|
---|
1635 | for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; hdh_pp = &hdh_p->hdh_next)
|
---|
1636 | if (hdh_p->sec == sec)
|
---|
1637 | {
|
---|
1638 | /* Everything must go for SEC. */
|
---|
1639 | *hdh_pp = hdh_p->hdh_next;
|
---|
1640 | break;
|
---|
1641 | }
|
---|
1642 | }
|
---|
1643 |
|
---|
1644 | r_type = ELF32_R_TYPE (rela->r_info);
|
---|
1645 | r_type = elf32_hppa_optimized_tls_reloc (info, r_type, eh != NULL);
|
---|
1646 |
|
---|
1647 | switch (r_type)
|
---|
1648 | {
|
---|
1649 | case R_PARISC_DLTIND14F:
|
---|
1650 | case R_PARISC_DLTIND14R:
|
---|
1651 | case R_PARISC_DLTIND21L:
|
---|
1652 | case R_PARISC_TLS_GD21L:
|
---|
1653 | case R_PARISC_TLS_GD14R:
|
---|
1654 | case R_PARISC_TLS_IE21L:
|
---|
1655 | case R_PARISC_TLS_IE14R:
|
---|
1656 | if (eh != NULL)
|
---|
1657 | {
|
---|
1658 | if (eh->got.refcount > 0)
|
---|
1659 | eh->got.refcount -= 1;
|
---|
1660 | }
|
---|
1661 | else if (local_got_refcounts != NULL)
|
---|
1662 | {
|
---|
1663 | if (local_got_refcounts[r_symndx] > 0)
|
---|
1664 | local_got_refcounts[r_symndx] -= 1;
|
---|
1665 | }
|
---|
1666 | break;
|
---|
1667 |
|
---|
1668 | case R_PARISC_TLS_LDM21L:
|
---|
1669 | case R_PARISC_TLS_LDM14R:
|
---|
1670 | htab->tls_ldm_got.refcount -= 1;
|
---|
1671 | break;
|
---|
1672 |
|
---|
1673 | case R_PARISC_PCREL12F:
|
---|
1674 | case R_PARISC_PCREL17C:
|
---|
1675 | case R_PARISC_PCREL17F:
|
---|
1676 | case R_PARISC_PCREL22F:
|
---|
1677 | if (eh != NULL)
|
---|
1678 | {
|
---|
1679 | if (eh->plt.refcount > 0)
|
---|
1680 | eh->plt.refcount -= 1;
|
---|
1681 | }
|
---|
1682 | break;
|
---|
1683 |
|
---|
1684 | case R_PARISC_PLABEL14R:
|
---|
1685 | case R_PARISC_PLABEL21L:
|
---|
1686 | case R_PARISC_PLABEL32:
|
---|
1687 | if (eh != NULL)
|
---|
1688 | {
|
---|
1689 | if (eh->plt.refcount > 0)
|
---|
1690 | eh->plt.refcount -= 1;
|
---|
1691 | }
|
---|
1692 | else if (local_plt_refcounts != NULL)
|
---|
1693 | {
|
---|
1694 | if (local_plt_refcounts[r_symndx] > 0)
|
---|
1695 | local_plt_refcounts[r_symndx] -= 1;
|
---|
1696 | }
|
---|
1697 | break;
|
---|
1698 |
|
---|
1699 | default:
|
---|
1700 | break;
|
---|
1701 | }
|
---|
1702 | }
|
---|
1703 |
|
---|
1704 | return TRUE;
|
---|
1705 | }
|
---|
1706 |
|
---|
1707 | /* Support for core dump NOTE sections. */
|
---|
1708 |
|
---|
1709 | static bfd_boolean
|
---|
1710 | elf32_hppa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
|
---|
1711 | {
|
---|
1712 | int offset;
|
---|
1713 | size_t size;
|
---|
1714 |
|
---|
1715 | switch (note->descsz)
|
---|
1716 | {
|
---|
1717 | default:
|
---|
1718 | return FALSE;
|
---|
1719 |
|
---|
1720 | case 396: /* Linux/hppa */
|
---|
1721 | /* pr_cursig */
|
---|
1722 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
|
---|
1723 |
|
---|
1724 | /* pr_pid */
|
---|
1725 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
|
---|
1726 |
|
---|
1727 | /* pr_reg */
|
---|
1728 | offset = 72;
|
---|
1729 | size = 320;
|
---|
1730 |
|
---|
1731 | break;
|
---|
1732 | }
|
---|
1733 |
|
---|
1734 | /* Make a ".reg/999" section. */
|
---|
1735 | return _bfd_elfcore_make_pseudosection (abfd, ".reg",
|
---|
1736 | size, note->descpos + offset);
|
---|
1737 | }
|
---|
1738 |
|
---|
1739 | static bfd_boolean
|
---|
1740 | elf32_hppa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
|
---|
1741 | {
|
---|
1742 | switch (note->descsz)
|
---|
1743 | {
|
---|
1744 | default:
|
---|
1745 | return FALSE;
|
---|
1746 |
|
---|
1747 | case 124: /* Linux/hppa elf_prpsinfo. */
|
---|
1748 | elf_tdata (abfd)->core->program
|
---|
1749 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
|
---|
1750 | elf_tdata (abfd)->core->command
|
---|
1751 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
|
---|
1752 | }
|
---|
1753 |
|
---|
1754 | /* Note that for some reason, a spurious space is tacked
|
---|
1755 | onto the end of the args in some (at least one anyway)
|
---|
1756 | implementations, so strip it off if it exists. */
|
---|
1757 | {
|
---|
1758 | char *command = elf_tdata (abfd)->core->command;
|
---|
1759 | int n = strlen (command);
|
---|
1760 |
|
---|
1761 | if (0 < n && command[n - 1] == ' ')
|
---|
1762 | command[n - 1] = '\0';
|
---|
1763 | }
|
---|
1764 |
|
---|
1765 | return TRUE;
|
---|
1766 | }
|
---|
1767 |
|
---|
1768 | /* Our own version of hide_symbol, so that we can keep plt entries for
|
---|
1769 | plabels. */
|
---|
1770 |
|
---|
1771 | static void
|
---|
1772 | elf32_hppa_hide_symbol (struct bfd_link_info *info,
|
---|
1773 | struct elf_link_hash_entry *eh,
|
---|
1774 | bfd_boolean force_local)
|
---|
1775 | {
|
---|
1776 | if (force_local)
|
---|
1777 | {
|
---|
1778 | eh->forced_local = 1;
|
---|
1779 | if (eh->dynindx != -1)
|
---|
1780 | {
|
---|
1781 | eh->dynindx = -1;
|
---|
1782 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
|
---|
1783 | eh->dynstr_index);
|
---|
1784 | }
|
---|
1785 |
|
---|
1786 | /* PR 16082: Remove version information from hidden symbol. */
|
---|
1787 | eh->verinfo.verdef = NULL;
|
---|
1788 | eh->verinfo.vertree = NULL;
|
---|
1789 | }
|
---|
1790 |
|
---|
1791 | /* STT_GNU_IFUNC symbol must go through PLT. */
|
---|
1792 | if (! hppa_elf_hash_entry (eh)->plabel
|
---|
1793 | && eh->type != STT_GNU_IFUNC)
|
---|
1794 | {
|
---|
1795 | eh->needs_plt = 0;
|
---|
1796 | eh->plt = elf_hash_table (info)->init_plt_offset;
|
---|
1797 | }
|
---|
1798 | }
|
---|
1799 |
|
---|
1800 | /* Adjust a symbol defined by a dynamic object and referenced by a
|
---|
1801 | regular object. The current definition is in some section of the
|
---|
1802 | dynamic object, but we're not including those sections. We have to
|
---|
1803 | change the definition to something the rest of the link can
|
---|
1804 | understand. */
|
---|
1805 |
|
---|
1806 | static bfd_boolean
|
---|
1807 | elf32_hppa_adjust_dynamic_symbol (struct bfd_link_info *info,
|
---|
1808 | struct elf_link_hash_entry *eh)
|
---|
1809 | {
|
---|
1810 | struct elf32_hppa_link_hash_table *htab;
|
---|
1811 | asection *sec;
|
---|
1812 |
|
---|
1813 | /* If this is a function, put it in the procedure linkage table. We
|
---|
1814 | will fill in the contents of the procedure linkage table later. */
|
---|
1815 | if (eh->type == STT_FUNC
|
---|
1816 | || eh->needs_plt)
|
---|
1817 | {
|
---|
1818 | /* If the symbol is used by a plabel, we must allocate a PLT slot.
|
---|
1819 | The refcounts are not reliable when it has been hidden since
|
---|
1820 | hide_symbol can be called before the plabel flag is set. */
|
---|
1821 | if (hppa_elf_hash_entry (eh)->plabel
|
---|
1822 | && eh->plt.refcount <= 0)
|
---|
1823 | eh->plt.refcount = 1;
|
---|
1824 |
|
---|
1825 | if (eh->plt.refcount <= 0
|
---|
1826 | || (eh->def_regular
|
---|
1827 | && eh->root.type != bfd_link_hash_defweak
|
---|
1828 | && ! hppa_elf_hash_entry (eh)->plabel
|
---|
1829 | && (!bfd_link_pic (info) || SYMBOLIC_BIND (info, eh))))
|
---|
1830 | {
|
---|
1831 | /* The .plt entry is not needed when:
|
---|
1832 | a) Garbage collection has removed all references to the
|
---|
1833 | symbol, or
|
---|
1834 | b) We know for certain the symbol is defined in this
|
---|
1835 | object, and it's not a weak definition, nor is the symbol
|
---|
1836 | used by a plabel relocation. Either this object is the
|
---|
1837 | application or we are doing a shared symbolic link. */
|
---|
1838 |
|
---|
1839 | eh->plt.offset = (bfd_vma) -1;
|
---|
1840 | eh->needs_plt = 0;
|
---|
1841 | }
|
---|
1842 |
|
---|
1843 | return TRUE;
|
---|
1844 | }
|
---|
1845 | else
|
---|
1846 | eh->plt.offset = (bfd_vma) -1;
|
---|
1847 |
|
---|
1848 | /* If this is a weak symbol, and there is a real definition, the
|
---|
1849 | processor independent code will have arranged for us to see the
|
---|
1850 | real definition first, and we can just use the same value. */
|
---|
1851 | if (eh->u.weakdef != NULL)
|
---|
1852 | {
|
---|
1853 | if (eh->u.weakdef->root.type != bfd_link_hash_defined
|
---|
1854 | && eh->u.weakdef->root.type != bfd_link_hash_defweak)
|
---|
1855 | abort ();
|
---|
1856 | eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
|
---|
1857 | eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
|
---|
1858 | if (ELIMINATE_COPY_RELOCS)
|
---|
1859 | eh->non_got_ref = eh->u.weakdef->non_got_ref;
|
---|
1860 | return TRUE;
|
---|
1861 | }
|
---|
1862 |
|
---|
1863 | /* This is a reference to a symbol defined by a dynamic object which
|
---|
1864 | is not a function. */
|
---|
1865 |
|
---|
1866 | /* If we are creating a shared library, we must presume that the
|
---|
1867 | only references to the symbol are via the global offset table.
|
---|
1868 | For such cases we need not do anything here; the relocations will
|
---|
1869 | be handled correctly by relocate_section. */
|
---|
1870 | if (bfd_link_pic (info))
|
---|
1871 | return TRUE;
|
---|
1872 |
|
---|
1873 | /* If there are no references to this symbol that do not use the
|
---|
1874 | GOT, we don't need to generate a copy reloc. */
|
---|
1875 | if (!eh->non_got_ref)
|
---|
1876 | return TRUE;
|
---|
1877 |
|
---|
1878 | if (ELIMINATE_COPY_RELOCS)
|
---|
1879 | {
|
---|
1880 | struct elf32_hppa_link_hash_entry *hh;
|
---|
1881 | struct elf32_hppa_dyn_reloc_entry *hdh_p;
|
---|
1882 |
|
---|
1883 | hh = hppa_elf_hash_entry (eh);
|
---|
1884 | for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
|
---|
1885 | {
|
---|
1886 | sec = hdh_p->sec->output_section;
|
---|
1887 | if (sec != NULL && (sec->flags & SEC_READONLY) != 0)
|
---|
1888 | break;
|
---|
1889 | }
|
---|
1890 |
|
---|
1891 | /* If we didn't find any dynamic relocs in read-only sections, then
|
---|
1892 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */
|
---|
1893 | if (hdh_p == NULL)
|
---|
1894 | {
|
---|
1895 | eh->non_got_ref = 0;
|
---|
1896 | return TRUE;
|
---|
1897 | }
|
---|
1898 | }
|
---|
1899 |
|
---|
1900 | /* We must allocate the symbol in our .dynbss section, which will
|
---|
1901 | become part of the .bss section of the executable. There will be
|
---|
1902 | an entry for this symbol in the .dynsym section. The dynamic
|
---|
1903 | object will contain position independent code, so all references
|
---|
1904 | from the dynamic object to this symbol will go through the global
|
---|
1905 | offset table. The dynamic linker will use the .dynsym entry to
|
---|
1906 | determine the address it must put in the global offset table, so
|
---|
1907 | both the dynamic object and the regular object will refer to the
|
---|
1908 | same memory location for the variable. */
|
---|
1909 |
|
---|
1910 | htab = hppa_link_hash_table (info);
|
---|
1911 | if (htab == NULL)
|
---|
1912 | return FALSE;
|
---|
1913 |
|
---|
1914 | /* We must generate a COPY reloc to tell the dynamic linker to
|
---|
1915 | copy the initial value out of the dynamic object and into the
|
---|
1916 | runtime process image. */
|
---|
1917 | if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
|
---|
1918 | {
|
---|
1919 | htab->srelbss->size += sizeof (Elf32_External_Rela);
|
---|
1920 | eh->needs_copy = 1;
|
---|
1921 | }
|
---|
1922 |
|
---|
1923 | sec = htab->sdynbss;
|
---|
1924 |
|
---|
1925 | return _bfd_elf_adjust_dynamic_copy (info, eh, sec);
|
---|
1926 | }
|
---|
1927 |
|
---|
1928 | /* Allocate space in the .plt for entries that won't have relocations.
|
---|
1929 | ie. plabel entries. */
|
---|
1930 |
|
---|
1931 | static bfd_boolean
|
---|
1932 | allocate_plt_static (struct elf_link_hash_entry *eh, void *inf)
|
---|
1933 | {
|
---|
1934 | struct bfd_link_info *info;
|
---|
1935 | struct elf32_hppa_link_hash_table *htab;
|
---|
1936 | struct elf32_hppa_link_hash_entry *hh;
|
---|
1937 | asection *sec;
|
---|
1938 |
|
---|
1939 | if (eh->root.type == bfd_link_hash_indirect)
|
---|
1940 | return TRUE;
|
---|
1941 |
|
---|
1942 | info = (struct bfd_link_info *) inf;
|
---|
1943 | hh = hppa_elf_hash_entry (eh);
|
---|
1944 | htab = hppa_link_hash_table (info);
|
---|
1945 | if (htab == NULL)
|
---|
1946 | return FALSE;
|
---|
1947 |
|
---|
1948 | if (htab->etab.dynamic_sections_created
|
---|
1949 | && eh->plt.refcount > 0)
|
---|
1950 | {
|
---|
1951 | /* Make sure this symbol is output as a dynamic symbol.
|
---|
1952 | Undefined weak syms won't yet be marked as dynamic. */
|
---|
1953 | if (eh->dynindx == -1
|
---|
1954 | && !eh->forced_local
|
---|
1955 | && eh->type != STT_PARISC_MILLI)
|
---|
1956 | {
|
---|
1957 | if (! bfd_elf_link_record_dynamic_symbol (info, eh))
|
---|
1958 | return FALSE;
|
---|
1959 | }
|
---|
1960 |
|
---|
1961 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
|
---|
1962 | {
|
---|
1963 | /* Allocate these later. From this point on, h->plabel
|
---|
1964 | means that the plt entry is only used by a plabel.
|
---|
1965 | We'll be using a normal plt entry for this symbol, so
|
---|
1966 | clear the plabel indicator. */
|
---|
1967 |
|
---|
1968 | hh->plabel = 0;
|
---|
1969 | }
|
---|
1970 | else if (hh->plabel)
|
---|
1971 | {
|
---|
1972 | /* Make an entry in the .plt section for plabel references
|
---|
1973 | that won't have a .plt entry for other reasons. */
|
---|
1974 | sec = htab->splt;
|
---|
1975 | eh->plt.offset = sec->size;
|
---|
1976 | sec->size += PLT_ENTRY_SIZE;
|
---|
1977 | }
|
---|
1978 | else
|
---|
1979 | {
|
---|
1980 | /* No .plt entry needed. */
|
---|
1981 | eh->plt.offset = (bfd_vma) -1;
|
---|
1982 | eh->needs_plt = 0;
|
---|
1983 | }
|
---|
1984 | }
|
---|
1985 | else
|
---|
1986 | {
|
---|
1987 | eh->plt.offset = (bfd_vma) -1;
|
---|
1988 | eh->needs_plt = 0;
|
---|
1989 | }
|
---|
1990 |
|
---|
1991 | return TRUE;
|
---|
1992 | }
|
---|
1993 |
|
---|
1994 | /* Allocate space in .plt, .got and associated reloc sections for
|
---|
1995 | global syms. */
|
---|
1996 |
|
---|
1997 | static bfd_boolean
|
---|
1998 | allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
|
---|
1999 | {
|
---|
2000 | struct bfd_link_info *info;
|
---|
2001 | struct elf32_hppa_link_hash_table *htab;
|
---|
2002 | asection *sec;
|
---|
2003 | struct elf32_hppa_link_hash_entry *hh;
|
---|
2004 | struct elf32_hppa_dyn_reloc_entry *hdh_p;
|
---|
2005 |
|
---|
2006 | if (eh->root.type == bfd_link_hash_indirect)
|
---|
2007 | return TRUE;
|
---|
2008 |
|
---|
2009 | info = inf;
|
---|
2010 | htab = hppa_link_hash_table (info);
|
---|
2011 | if (htab == NULL)
|
---|
2012 | return FALSE;
|
---|
2013 |
|
---|
2014 | hh = hppa_elf_hash_entry (eh);
|
---|
2015 |
|
---|
2016 | if (htab->etab.dynamic_sections_created
|
---|
2017 | && eh->plt.offset != (bfd_vma) -1
|
---|
2018 | && !hh->plabel
|
---|
2019 | && eh->plt.refcount > 0)
|
---|
2020 | {
|
---|
2021 | /* Make an entry in the .plt section. */
|
---|
2022 | sec = htab->splt;
|
---|
2023 | eh->plt.offset = sec->size;
|
---|
2024 | sec->size += PLT_ENTRY_SIZE;
|
---|
2025 |
|
---|
2026 | /* We also need to make an entry in the .rela.plt section. */
|
---|
2027 | htab->srelplt->size += sizeof (Elf32_External_Rela);
|
---|
2028 | htab->need_plt_stub = 1;
|
---|
2029 | }
|
---|
2030 |
|
---|
2031 | if (eh->got.refcount > 0)
|
---|
2032 | {
|
---|
2033 | /* Make sure this symbol is output as a dynamic symbol.
|
---|
2034 | Undefined weak syms won't yet be marked as dynamic. */
|
---|
2035 | if (eh->dynindx == -1
|
---|
2036 | && !eh->forced_local
|
---|
2037 | && eh->type != STT_PARISC_MILLI)
|
---|
2038 | {
|
---|
2039 | if (! bfd_elf_link_record_dynamic_symbol (info, eh))
|
---|
2040 | return FALSE;
|
---|
2041 | }
|
---|
2042 |
|
---|
2043 | sec = htab->sgot;
|
---|
2044 | eh->got.offset = sec->size;
|
---|
2045 | sec->size += GOT_ENTRY_SIZE;
|
---|
2046 | /* R_PARISC_TLS_GD* needs two GOT entries */
|
---|
2047 | if ((hh->tls_type & (GOT_TLS_GD | GOT_TLS_IE)) == (GOT_TLS_GD | GOT_TLS_IE))
|
---|
2048 | sec->size += GOT_ENTRY_SIZE * 2;
|
---|
2049 | else if ((hh->tls_type & GOT_TLS_GD) == GOT_TLS_GD)
|
---|
2050 | sec->size += GOT_ENTRY_SIZE;
|
---|
2051 | if (htab->etab.dynamic_sections_created
|
---|
2052 | && (bfd_link_pic (info)
|
---|
2053 | || (eh->dynindx != -1
|
---|
2054 | && !eh->forced_local)))
|
---|
2055 | {
|
---|
2056 | htab->srelgot->size += sizeof (Elf32_External_Rela);
|
---|
2057 | if ((hh->tls_type & (GOT_TLS_GD | GOT_TLS_IE)) == (GOT_TLS_GD | GOT_TLS_IE))
|
---|
2058 | htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
|
---|
2059 | else if ((hh->tls_type & GOT_TLS_GD) == GOT_TLS_GD)
|
---|
2060 | htab->srelgot->size += sizeof (Elf32_External_Rela);
|
---|
2061 | }
|
---|
2062 | }
|
---|
2063 | else
|
---|
2064 | eh->got.offset = (bfd_vma) -1;
|
---|
2065 |
|
---|
2066 | if (hh->dyn_relocs == NULL)
|
---|
2067 | return TRUE;
|
---|
2068 |
|
---|
2069 | /* If this is a -Bsymbolic shared link, then we need to discard all
|
---|
2070 | space allocated for dynamic pc-relative relocs against symbols
|
---|
2071 | defined in a regular object. For the normal shared case, discard
|
---|
2072 | space for relocs that have become local due to symbol visibility
|
---|
2073 | changes. */
|
---|
2074 | if (bfd_link_pic (info))
|
---|
2075 | {
|
---|
2076 | #if RELATIVE_DYNRELOCS
|
---|
2077 | if (SYMBOL_CALLS_LOCAL (info, eh))
|
---|
2078 | {
|
---|
2079 | struct elf32_hppa_dyn_reloc_entry **hdh_pp;
|
---|
2080 |
|
---|
2081 | for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
|
---|
2082 | {
|
---|
2083 | hdh_p->count -= hdh_p->relative_count;
|
---|
2084 | hdh_p->relative_count = 0;
|
---|
2085 | if (hdh_p->count == 0)
|
---|
2086 | *hdh_pp = hdh_p->hdh_next;
|
---|
2087 | else
|
---|
2088 | hdh_pp = &hdh_p->hdh_next;
|
---|
2089 | }
|
---|
2090 | }
|
---|
2091 | #endif
|
---|
2092 |
|
---|
2093 | /* Also discard relocs on undefined weak syms with non-default
|
---|
2094 | visibility. */
|
---|
2095 | if (hh->dyn_relocs != NULL
|
---|
2096 | && eh->root.type == bfd_link_hash_undefweak)
|
---|
2097 | {
|
---|
2098 | if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
|
---|
2099 | hh->dyn_relocs = NULL;
|
---|
2100 |
|
---|
2101 | /* Make sure undefined weak symbols are output as a dynamic
|
---|
2102 | symbol in PIEs. */
|
---|
2103 | else if (eh->dynindx == -1
|
---|
2104 | && !eh->forced_local)
|
---|
2105 | {
|
---|
2106 | if (! bfd_elf_link_record_dynamic_symbol (info, eh))
|
---|
2107 | return FALSE;
|
---|
2108 | }
|
---|
2109 | }
|
---|
2110 | }
|
---|
2111 | else
|
---|
2112 | {
|
---|
2113 | /* For the non-shared case, discard space for relocs against
|
---|
2114 | symbols which turn out to need copy relocs or are not
|
---|
2115 | dynamic. */
|
---|
2116 |
|
---|
2117 | if (!eh->non_got_ref
|
---|
2118 | && ((ELIMINATE_COPY_RELOCS
|
---|
2119 | && eh->def_dynamic
|
---|
2120 | && !eh->def_regular)
|
---|
2121 | || (htab->etab.dynamic_sections_created
|
---|
2122 | && (eh->root.type == bfd_link_hash_undefweak
|
---|
2123 | || eh->root.type == bfd_link_hash_undefined))))
|
---|
2124 | {
|
---|
2125 | /* Make sure this symbol is output as a dynamic symbol.
|
---|
2126 | Undefined weak syms won't yet be marked as dynamic. */
|
---|
2127 | if (eh->dynindx == -1
|
---|
2128 | && !eh->forced_local
|
---|
2129 | && eh->type != STT_PARISC_MILLI)
|
---|
2130 | {
|
---|
2131 | if (! bfd_elf_link_record_dynamic_symbol (info, eh))
|
---|
2132 | return FALSE;
|
---|
2133 | }
|
---|
2134 |
|
---|
2135 | /* If that succeeded, we know we'll be keeping all the
|
---|
2136 | relocs. */
|
---|
2137 | if (eh->dynindx != -1)
|
---|
2138 | goto keep;
|
---|
2139 | }
|
---|
2140 |
|
---|
2141 | hh->dyn_relocs = NULL;
|
---|
2142 | return TRUE;
|
---|
2143 |
|
---|
2144 | keep: ;
|
---|
2145 | }
|
---|
2146 |
|
---|
2147 | /* Finally, allocate space. */
|
---|
2148 | for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
|
---|
2149 | {
|
---|
2150 | asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
|
---|
2151 | sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
|
---|
2152 | }
|
---|
2153 |
|
---|
2154 | return TRUE;
|
---|
2155 | }
|
---|
2156 |
|
---|
2157 | /* This function is called via elf_link_hash_traverse to force
|
---|
2158 | millicode symbols local so they do not end up as globals in the
|
---|
2159 | dynamic symbol table. We ought to be able to do this in
|
---|
2160 | adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called
|
---|
2161 | for all dynamic symbols. Arguably, this is a bug in
|
---|
2162 | elf_adjust_dynamic_symbol. */
|
---|
2163 |
|
---|
2164 | static bfd_boolean
|
---|
2165 | clobber_millicode_symbols (struct elf_link_hash_entry *eh,
|
---|
2166 | struct bfd_link_info *info)
|
---|
2167 | {
|
---|
2168 | if (eh->type == STT_PARISC_MILLI
|
---|
2169 | && !eh->forced_local)
|
---|
2170 | {
|
---|
2171 | elf32_hppa_hide_symbol (info, eh, TRUE);
|
---|
2172 | }
|
---|
2173 | return TRUE;
|
---|
2174 | }
|
---|
2175 |
|
---|
2176 | /* Find any dynamic relocs that apply to read-only sections. */
|
---|
2177 |
|
---|
2178 | static bfd_boolean
|
---|
2179 | readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
|
---|
2180 | {
|
---|
2181 | struct elf32_hppa_link_hash_entry *hh;
|
---|
2182 | struct elf32_hppa_dyn_reloc_entry *hdh_p;
|
---|
2183 |
|
---|
2184 | hh = hppa_elf_hash_entry (eh);
|
---|
2185 | for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
|
---|
2186 | {
|
---|
2187 | asection *sec = hdh_p->sec->output_section;
|
---|
2188 |
|
---|
2189 | if (sec != NULL && (sec->flags & SEC_READONLY) != 0)
|
---|
2190 | {
|
---|
2191 | struct bfd_link_info *info = inf;
|
---|
2192 |
|
---|
2193 | info->flags |= DF_TEXTREL;
|
---|
2194 |
|
---|
2195 | /* Not an error, just cut short the traversal. */
|
---|
2196 | return FALSE;
|
---|
2197 | }
|
---|
2198 | }
|
---|
2199 | return TRUE;
|
---|
2200 | }
|
---|
2201 |
|
---|
2202 | /* Set the sizes of the dynamic sections. */
|
---|
2203 |
|
---|
2204 | static bfd_boolean
|
---|
2205 | elf32_hppa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
---|
2206 | struct bfd_link_info *info)
|
---|
2207 | {
|
---|
2208 | struct elf32_hppa_link_hash_table *htab;
|
---|
2209 | bfd *dynobj;
|
---|
2210 | bfd *ibfd;
|
---|
2211 | asection *sec;
|
---|
2212 | bfd_boolean relocs;
|
---|
2213 |
|
---|
2214 | htab = hppa_link_hash_table (info);
|
---|
2215 | if (htab == NULL)
|
---|
2216 | return FALSE;
|
---|
2217 |
|
---|
2218 | dynobj = htab->etab.dynobj;
|
---|
2219 | if (dynobj == NULL)
|
---|
2220 | abort ();
|
---|
2221 |
|
---|
2222 | if (htab->etab.dynamic_sections_created)
|
---|
2223 | {
|
---|
2224 | /* Set the contents of the .interp section to the interpreter. */
|
---|
2225 | if (bfd_link_executable (info) && !info->nointerp)
|
---|
2226 | {
|
---|
2227 | sec = bfd_get_linker_section (dynobj, ".interp");
|
---|
2228 | if (sec == NULL)
|
---|
2229 | abort ();
|
---|
2230 | sec->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
---|
2231 | sec->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
---|
2232 | }
|
---|
2233 |
|
---|
2234 | /* Force millicode symbols local. */
|
---|
2235 | elf_link_hash_traverse (&htab->etab,
|
---|
2236 | clobber_millicode_symbols,
|
---|
2237 | info);
|
---|
2238 | }
|
---|
2239 |
|
---|
2240 | /* Set up .got and .plt offsets for local syms, and space for local
|
---|
2241 | dynamic relocs. */
|
---|
2242 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
|
---|
2243 | {
|
---|
2244 | bfd_signed_vma *local_got;
|
---|
2245 | bfd_signed_vma *end_local_got;
|
---|
2246 | bfd_signed_vma *local_plt;
|
---|
2247 | bfd_signed_vma *end_local_plt;
|
---|
2248 | bfd_size_type locsymcount;
|
---|
2249 | Elf_Internal_Shdr *symtab_hdr;
|
---|
2250 | asection *srel;
|
---|
2251 | char *local_tls_type;
|
---|
2252 |
|
---|
2253 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
|
---|
2254 | continue;
|
---|
2255 |
|
---|
2256 | for (sec = ibfd->sections; sec != NULL; sec = sec->next)
|
---|
2257 | {
|
---|
2258 | struct elf32_hppa_dyn_reloc_entry *hdh_p;
|
---|
2259 |
|
---|
2260 | for (hdh_p = ((struct elf32_hppa_dyn_reloc_entry *)
|
---|
2261 | elf_section_data (sec)->local_dynrel);
|
---|
2262 | hdh_p != NULL;
|
---|
2263 | hdh_p = hdh_p->hdh_next)
|
---|
2264 | {
|
---|
2265 | if (!bfd_is_abs_section (hdh_p->sec)
|
---|
2266 | && bfd_is_abs_section (hdh_p->sec->output_section))
|
---|
2267 | {
|
---|
2268 | /* Input section has been discarded, either because
|
---|
2269 | it is a copy of a linkonce section or due to
|
---|
2270 | linker script /DISCARD/, so we'll be discarding
|
---|
2271 | the relocs too. */
|
---|
2272 | }
|
---|
2273 | else if (hdh_p->count != 0)
|
---|
2274 | {
|
---|
2275 | srel = elf_section_data (hdh_p->sec)->sreloc;
|
---|
2276 | srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
|
---|
2277 | if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
|
---|
2278 | info->flags |= DF_TEXTREL;
|
---|
2279 | }
|
---|
2280 | }
|
---|
2281 | }
|
---|
2282 |
|
---|
2283 | local_got = elf_local_got_refcounts (ibfd);
|
---|
2284 | if (!local_got)
|
---|
2285 | continue;
|
---|
2286 |
|
---|
2287 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
---|
2288 | locsymcount = symtab_hdr->sh_info;
|
---|
2289 | end_local_got = local_got + locsymcount;
|
---|
2290 | local_tls_type = hppa_elf_local_got_tls_type (ibfd);
|
---|
2291 | sec = htab->sgot;
|
---|
2292 | srel = htab->srelgot;
|
---|
2293 | for (; local_got < end_local_got; ++local_got)
|
---|
2294 | {
|
---|
2295 | if (*local_got > 0)
|
---|
2296 | {
|
---|
2297 | *local_got = sec->size;
|
---|
2298 | sec->size += GOT_ENTRY_SIZE;
|
---|
2299 | if ((*local_tls_type & (GOT_TLS_GD | GOT_TLS_IE)) == (GOT_TLS_GD | GOT_TLS_IE))
|
---|
2300 | sec->size += 2 * GOT_ENTRY_SIZE;
|
---|
2301 | else if ((*local_tls_type & GOT_TLS_GD) == GOT_TLS_GD)
|
---|
2302 | sec->size += GOT_ENTRY_SIZE;
|
---|
2303 | if (bfd_link_pic (info))
|
---|
2304 | {
|
---|
2305 | srel->size += sizeof (Elf32_External_Rela);
|
---|
2306 | if ((*local_tls_type & (GOT_TLS_GD | GOT_TLS_IE)) == (GOT_TLS_GD | GOT_TLS_IE))
|
---|
2307 | srel->size += 2 * sizeof (Elf32_External_Rela);
|
---|
2308 | else if ((*local_tls_type & GOT_TLS_GD) == GOT_TLS_GD)
|
---|
2309 | srel->size += sizeof (Elf32_External_Rela);
|
---|
2310 | }
|
---|
2311 | }
|
---|
2312 | else
|
---|
2313 | *local_got = (bfd_vma) -1;
|
---|
2314 |
|
---|
2315 | ++local_tls_type;
|
---|
2316 | }
|
---|
2317 |
|
---|
2318 | local_plt = end_local_got;
|
---|
2319 | end_local_plt = local_plt + locsymcount;
|
---|
2320 | if (! htab->etab.dynamic_sections_created)
|
---|
2321 | {
|
---|
2322 | /* Won't be used, but be safe. */
|
---|
2323 | for (; local_plt < end_local_plt; ++local_plt)
|
---|
2324 | *local_plt = (bfd_vma) -1;
|
---|
2325 | }
|
---|
2326 | else
|
---|
2327 | {
|
---|
2328 | sec = htab->splt;
|
---|
2329 | srel = htab->srelplt;
|
---|
2330 | for (; local_plt < end_local_plt; ++local_plt)
|
---|
2331 | {
|
---|
2332 | if (*local_plt > 0)
|
---|
2333 | {
|
---|
2334 | *local_plt = sec->size;
|
---|
2335 | sec->size += PLT_ENTRY_SIZE;
|
---|
2336 | if (bfd_link_pic (info))
|
---|
2337 | srel->size += sizeof (Elf32_External_Rela);
|
---|
2338 | }
|
---|
2339 | else
|
---|
2340 | *local_plt = (bfd_vma) -1;
|
---|
2341 | }
|
---|
2342 | }
|
---|
2343 | }
|
---|
2344 |
|
---|
2345 | if (htab->tls_ldm_got.refcount > 0)
|
---|
2346 | {
|
---|
2347 | /* Allocate 2 got entries and 1 dynamic reloc for
|
---|
2348 | R_PARISC_TLS_DTPMOD32 relocs. */
|
---|
2349 | htab->tls_ldm_got.offset = htab->sgot->size;
|
---|
2350 | htab->sgot->size += (GOT_ENTRY_SIZE * 2);
|
---|
2351 | htab->srelgot->size += sizeof (Elf32_External_Rela);
|
---|
2352 | }
|
---|
2353 | else
|
---|
2354 | htab->tls_ldm_got.offset = -1;
|
---|
2355 |
|
---|
2356 | /* Do all the .plt entries without relocs first. The dynamic linker
|
---|
2357 | uses the last .plt reloc to find the end of the .plt (and hence
|
---|
2358 | the start of the .got) for lazy linking. */
|
---|
2359 | elf_link_hash_traverse (&htab->etab, allocate_plt_static, info);
|
---|
2360 |
|
---|
2361 | /* Allocate global sym .plt and .got entries, and space for global
|
---|
2362 | sym dynamic relocs. */
|
---|
2363 | elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
|
---|
2364 |
|
---|
2365 | /* The check_relocs and adjust_dynamic_symbol entry points have
|
---|
2366 | determined the sizes of the various dynamic sections. Allocate
|
---|
2367 | memory for them. */
|
---|
2368 | relocs = FALSE;
|
---|
2369 | for (sec = dynobj->sections; sec != NULL; sec = sec->next)
|
---|
2370 | {
|
---|
2371 | if ((sec->flags & SEC_LINKER_CREATED) == 0)
|
---|
2372 | continue;
|
---|
2373 |
|
---|
2374 | if (sec == htab->splt)
|
---|
2375 | {
|
---|
2376 | if (htab->need_plt_stub)
|
---|
2377 | {
|
---|
2378 | /* Make space for the plt stub at the end of the .plt
|
---|
2379 | section. We want this stub right at the end, up
|
---|
2380 | against the .got section. */
|
---|
2381 | int gotalign = bfd_section_alignment (dynobj, htab->sgot);
|
---|
2382 | int pltalign = bfd_section_alignment (dynobj, sec);
|
---|
2383 | bfd_size_type mask;
|
---|
2384 |
|
---|
2385 | if (gotalign > pltalign)
|
---|
2386 | (void) bfd_set_section_alignment (dynobj, sec, gotalign);
|
---|
2387 | mask = ((bfd_size_type) 1 << gotalign) - 1;
|
---|
2388 | sec->size = (sec->size + sizeof (plt_stub) + mask) & ~mask;
|
---|
2389 | }
|
---|
2390 | }
|
---|
2391 | else if (sec == htab->sgot
|
---|
2392 | || sec == htab->sdynbss)
|
---|
2393 | ;
|
---|
2394 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, sec), ".rela"))
|
---|
2395 | {
|
---|
2396 | if (sec->size != 0)
|
---|
2397 | {
|
---|
2398 | /* Remember whether there are any reloc sections other
|
---|
2399 | than .rela.plt. */
|
---|
2400 | if (sec != htab->srelplt)
|
---|
2401 | relocs = TRUE;
|
---|
2402 |
|
---|
2403 | /* We use the reloc_count field as a counter if we need
|
---|
2404 | to copy relocs into the output file. */
|
---|
2405 | sec->reloc_count = 0;
|
---|
2406 | }
|
---|
2407 | }
|
---|
2408 | else
|
---|
2409 | {
|
---|
2410 | /* It's not one of our sections, so don't allocate space. */
|
---|
2411 | continue;
|
---|
2412 | }
|
---|
2413 |
|
---|
2414 | if (sec->size == 0)
|
---|
2415 | {
|
---|
2416 | /* If we don't need this section, strip it from the
|
---|
2417 | output file. This is mostly to handle .rela.bss and
|
---|
2418 | .rela.plt. We must create both sections in
|
---|
2419 | create_dynamic_sections, because they must be created
|
---|
2420 | before the linker maps input sections to output
|
---|
2421 | sections. The linker does that before
|
---|
2422 | adjust_dynamic_symbol is called, and it is that
|
---|
2423 | function which decides whether anything needs to go
|
---|
2424 | into these sections. */
|
---|
2425 | sec->flags |= SEC_EXCLUDE;
|
---|
2426 | continue;
|
---|
2427 | }
|
---|
2428 |
|
---|
2429 | if ((sec->flags & SEC_HAS_CONTENTS) == 0)
|
---|
2430 | continue;
|
---|
2431 |
|
---|
2432 | /* Allocate memory for the section contents. Zero it, because
|
---|
2433 | we may not fill in all the reloc sections. */
|
---|
2434 | sec->contents = bfd_zalloc (dynobj, sec->size);
|
---|
2435 | if (sec->contents == NULL)
|
---|
2436 | return FALSE;
|
---|
2437 | }
|
---|
2438 |
|
---|
2439 | if (htab->etab.dynamic_sections_created)
|
---|
2440 | {
|
---|
2441 | /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It
|
---|
2442 | actually has nothing to do with the PLT, it is how we
|
---|
2443 | communicate the LTP value of a load module to the dynamic
|
---|
2444 | linker. */
|
---|
2445 | #define add_dynamic_entry(TAG, VAL) \
|
---|
2446 | _bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
---|
2447 |
|
---|
2448 | if (!add_dynamic_entry (DT_PLTGOT, 0))
|
---|
2449 | return FALSE;
|
---|
2450 |
|
---|
2451 | /* Add some entries to the .dynamic section. We fill in the
|
---|
2452 | values later, in elf32_hppa_finish_dynamic_sections, but we
|
---|
2453 | must add the entries now so that we get the correct size for
|
---|
2454 | the .dynamic section. The DT_DEBUG entry is filled in by the
|
---|
2455 | dynamic linker and used by the debugger. */
|
---|
2456 | if (bfd_link_executable (info))
|
---|
2457 | {
|
---|
2458 | if (!add_dynamic_entry (DT_DEBUG, 0))
|
---|
2459 | return FALSE;
|
---|
2460 | }
|
---|
2461 |
|
---|
2462 | if (htab->srelplt->size != 0)
|
---|
2463 | {
|
---|
2464 | if (!add_dynamic_entry (DT_PLTRELSZ, 0)
|
---|
2465 | || !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
---|
2466 | || !add_dynamic_entry (DT_JMPREL, 0))
|
---|
2467 | return FALSE;
|
---|
2468 | }
|
---|
2469 |
|
---|
2470 | if (relocs)
|
---|
2471 | {
|
---|
2472 | if (!add_dynamic_entry (DT_RELA, 0)
|
---|
2473 | || !add_dynamic_entry (DT_RELASZ, 0)
|
---|
2474 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
|
---|
2475 | return FALSE;
|
---|
2476 |
|
---|
2477 | /* If any dynamic relocs apply to a read-only section,
|
---|
2478 | then we need a DT_TEXTREL entry. */
|
---|
2479 | if ((info->flags & DF_TEXTREL) == 0)
|
---|
2480 | elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
|
---|
2481 |
|
---|
2482 | if ((info->flags & DF_TEXTREL) != 0)
|
---|
2483 | {
|
---|
2484 | if (!add_dynamic_entry (DT_TEXTREL, 0))
|
---|
2485 | return FALSE;
|
---|
2486 | }
|
---|
2487 | }
|
---|
2488 | }
|
---|
2489 | #undef add_dynamic_entry
|
---|
2490 |
|
---|
2491 | return TRUE;
|
---|
2492 | }
|
---|
2493 |
|
---|
2494 | /* External entry points for sizing and building linker stubs. */
|
---|
2495 |
|
---|
2496 | /* Set up various things so that we can make a list of input sections
|
---|
2497 | for each output section included in the link. Returns -1 on error,
|
---|
2498 | 0 when no stubs will be needed, and 1 on success. */
|
---|
2499 |
|
---|
2500 | int
|
---|
2501 | elf32_hppa_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
|
---|
2502 | {
|
---|
2503 | bfd *input_bfd;
|
---|
2504 | unsigned int bfd_count;
|
---|
2505 | unsigned int top_id, top_index;
|
---|
2506 | asection *section;
|
---|
2507 | asection **input_list, **list;
|
---|
2508 | bfd_size_type amt;
|
---|
2509 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
|
---|
2510 |
|
---|
2511 | if (htab == NULL)
|
---|
2512 | return -1;
|
---|
2513 |
|
---|
2514 | /* Count the number of input BFDs and find the top input section id. */
|
---|
2515 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
|
---|
2516 | input_bfd != NULL;
|
---|
2517 | input_bfd = input_bfd->link.next)
|
---|
2518 | {
|
---|
2519 | bfd_count += 1;
|
---|
2520 | for (section = input_bfd->sections;
|
---|
2521 | section != NULL;
|
---|
2522 | section = section->next)
|
---|
2523 | {
|
---|
2524 | if (top_id < section->id)
|
---|
2525 | top_id = section->id;
|
---|
2526 | }
|
---|
2527 | }
|
---|
2528 | htab->bfd_count = bfd_count;
|
---|
2529 |
|
---|
2530 | amt = sizeof (struct map_stub) * (top_id + 1);
|
---|
2531 | htab->stub_group = bfd_zmalloc (amt);
|
---|
2532 | if (htab->stub_group == NULL)
|
---|
2533 | return -1;
|
---|
2534 |
|
---|
2535 | /* We can't use output_bfd->section_count here to find the top output
|
---|
2536 | section index as some sections may have been removed, and
|
---|
2537 | strip_excluded_output_sections doesn't renumber the indices. */
|
---|
2538 | for (section = output_bfd->sections, top_index = 0;
|
---|
2539 | section != NULL;
|
---|
2540 | section = section->next)
|
---|
2541 | {
|
---|
2542 | if (top_index < section->index)
|
---|
2543 | top_index = section->index;
|
---|
2544 | }
|
---|
2545 |
|
---|
2546 | htab->top_index = top_index;
|
---|
2547 | amt = sizeof (asection *) * (top_index + 1);
|
---|
2548 | input_list = bfd_malloc (amt);
|
---|
2549 | htab->input_list = input_list;
|
---|
2550 | if (input_list == NULL)
|
---|
2551 | return -1;
|
---|
2552 |
|
---|
2553 | /* For sections we aren't interested in, mark their entries with a
|
---|
2554 | value we can check later. */
|
---|
2555 | list = input_list + top_index;
|
---|
2556 | do
|
---|
2557 | *list = bfd_abs_section_ptr;
|
---|
2558 | while (list-- != input_list);
|
---|
2559 |
|
---|
2560 | for (section = output_bfd->sections;
|
---|
2561 | section != NULL;
|
---|
2562 | section = section->next)
|
---|
2563 | {
|
---|
2564 | if ((section->flags & SEC_CODE) != 0)
|
---|
2565 | input_list[section->index] = NULL;
|
---|
2566 | }
|
---|
2567 |
|
---|
2568 | return 1;
|
---|
2569 | }
|
---|
2570 |
|
---|
2571 | /* The linker repeatedly calls this function for each input section,
|
---|
2572 | in the order that input sections are linked into output sections.
|
---|
2573 | Build lists of input sections to determine groupings between which
|
---|
2574 | we may insert linker stubs. */
|
---|
2575 |
|
---|
2576 | void
|
---|
2577 | elf32_hppa_next_input_section (struct bfd_link_info *info, asection *isec)
|
---|
2578 | {
|
---|
2579 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
|
---|
2580 |
|
---|
2581 | if (htab == NULL)
|
---|
2582 | return;
|
---|
2583 |
|
---|
2584 | if (isec->output_section->index <= htab->top_index)
|
---|
2585 | {
|
---|
2586 | asection **list = htab->input_list + isec->output_section->index;
|
---|
2587 | if (*list != bfd_abs_section_ptr)
|
---|
2588 | {
|
---|
2589 | /* Steal the link_sec pointer for our list. */
|
---|
2590 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
|
---|
2591 | /* This happens to make the list in reverse order,
|
---|
2592 | which is what we want. */
|
---|
2593 | PREV_SEC (isec) = *list;
|
---|
2594 | *list = isec;
|
---|
2595 | }
|
---|
2596 | }
|
---|
2597 | }
|
---|
2598 |
|
---|
2599 | /* See whether we can group stub sections together. Grouping stub
|
---|
2600 | sections may result in fewer stubs. More importantly, we need to
|
---|
2601 | put all .init* and .fini* stubs at the beginning of the .init or
|
---|
2602 | .fini output sections respectively, because glibc splits the
|
---|
2603 | _init and _fini functions into multiple parts. Putting a stub in
|
---|
2604 | the middle of a function is not a good idea. */
|
---|
2605 |
|
---|
2606 | static void
|
---|
2607 | group_sections (struct elf32_hppa_link_hash_table *htab,
|
---|
2608 | bfd_size_type stub_group_size,
|
---|
2609 | bfd_boolean stubs_always_before_branch)
|
---|
2610 | {
|
---|
2611 | asection **list = htab->input_list + htab->top_index;
|
---|
2612 | do
|
---|
2613 | {
|
---|
2614 | asection *tail = *list;
|
---|
2615 | if (tail == bfd_abs_section_ptr)
|
---|
2616 | continue;
|
---|
2617 | while (tail != NULL)
|
---|
2618 | {
|
---|
2619 | asection *curr;
|
---|
2620 | asection *prev;
|
---|
2621 | bfd_size_type total;
|
---|
2622 | bfd_boolean big_sec;
|
---|
2623 |
|
---|
2624 | curr = tail;
|
---|
2625 | total = tail->size;
|
---|
2626 | big_sec = total >= stub_group_size;
|
---|
2627 |
|
---|
2628 | while ((prev = PREV_SEC (curr)) != NULL
|
---|
2629 | && ((total += curr->output_offset - prev->output_offset)
|
---|
2630 | < stub_group_size))
|
---|
2631 | curr = prev;
|
---|
2632 |
|
---|
2633 | /* OK, the size from the start of CURR to the end is less
|
---|
2634 | than 240000 bytes and thus can be handled by one stub
|
---|
2635 | section. (or the tail section is itself larger than
|
---|
2636 | 240000 bytes, in which case we may be toast.)
|
---|
2637 | We should really be keeping track of the total size of
|
---|
2638 | stubs added here, as stubs contribute to the final output
|
---|
2639 | section size. That's a little tricky, and this way will
|
---|
2640 | only break if stubs added total more than 22144 bytes, or
|
---|
2641 | 2768 long branch stubs. It seems unlikely for more than
|
---|
2642 | 2768 different functions to be called, especially from
|
---|
2643 | code only 240000 bytes long. This limit used to be
|
---|
2644 | 250000, but c++ code tends to generate lots of little
|
---|
2645 | functions, and sometimes violated the assumption. */
|
---|
2646 | do
|
---|
2647 | {
|
---|
2648 | prev = PREV_SEC (tail);
|
---|
2649 | /* Set up this stub group. */
|
---|
2650 | htab->stub_group[tail->id].link_sec = curr;
|
---|
2651 | }
|
---|
2652 | while (tail != curr && (tail = prev) != NULL);
|
---|
2653 |
|
---|
2654 | /* But wait, there's more! Input sections up to 240000
|
---|
2655 | bytes before the stub section can be handled by it too.
|
---|
2656 | Don't do this if we have a really large section after the
|
---|
2657 | stubs, as adding more stubs increases the chance that
|
---|
2658 | branches may not reach into the stub section. */
|
---|
2659 | if (!stubs_always_before_branch && !big_sec)
|
---|
2660 | {
|
---|
2661 | total = 0;
|
---|
2662 | while (prev != NULL
|
---|
2663 | && ((total += tail->output_offset - prev->output_offset)
|
---|
2664 | < stub_group_size))
|
---|
2665 | {
|
---|
2666 | tail = prev;
|
---|
2667 | prev = PREV_SEC (tail);
|
---|
2668 | htab->stub_group[tail->id].link_sec = curr;
|
---|
2669 | }
|
---|
2670 | }
|
---|
2671 | tail = prev;
|
---|
2672 | }
|
---|
2673 | }
|
---|
2674 | while (list-- != htab->input_list);
|
---|
2675 | free (htab->input_list);
|
---|
2676 | #undef PREV_SEC
|
---|
2677 | }
|
---|
2678 |
|
---|
2679 | /* Read in all local syms for all input bfds, and create hash entries
|
---|
2680 | for export stubs if we are building a multi-subspace shared lib.
|
---|
2681 | Returns -1 on error, 1 if export stubs created, 0 otherwise. */
|
---|
2682 |
|
---|
2683 | static int
|
---|
2684 | get_local_syms (bfd *output_bfd, bfd *input_bfd, struct bfd_link_info *info)
|
---|
2685 | {
|
---|
2686 | unsigned int bfd_indx;
|
---|
2687 | Elf_Internal_Sym *local_syms, **all_local_syms;
|
---|
2688 | int stub_changed = 0;
|
---|
2689 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
|
---|
2690 |
|
---|
2691 | if (htab == NULL)
|
---|
2692 | return -1;
|
---|
2693 |
|
---|
2694 | /* We want to read in symbol extension records only once. To do this
|
---|
2695 | we need to read in the local symbols in parallel and save them for
|
---|
2696 | later use; so hold pointers to the local symbols in an array. */
|
---|
2697 | bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
|
---|
2698 | all_local_syms = bfd_zmalloc (amt);
|
---|
2699 | htab->all_local_syms = all_local_syms;
|
---|
2700 | if (all_local_syms == NULL)
|
---|
2701 | return -1;
|
---|
2702 |
|
---|
2703 | /* Walk over all the input BFDs, swapping in local symbols.
|
---|
2704 | If we are creating a shared library, create hash entries for the
|
---|
2705 | export stubs. */
|
---|
2706 | for (bfd_indx = 0;
|
---|
2707 | input_bfd != NULL;
|
---|
2708 | input_bfd = input_bfd->link.next, bfd_indx++)
|
---|
2709 | {
|
---|
2710 | Elf_Internal_Shdr *symtab_hdr;
|
---|
2711 |
|
---|
2712 | /* We'll need the symbol table in a second. */
|
---|
2713 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
---|
2714 | if (symtab_hdr->sh_info == 0)
|
---|
2715 | continue;
|
---|
2716 |
|
---|
2717 | /* We need an array of the local symbols attached to the input bfd. */
|
---|
2718 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
|
---|
2719 | if (local_syms == NULL)
|
---|
2720 | {
|
---|
2721 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
|
---|
2722 | symtab_hdr->sh_info, 0,
|
---|
2723 | NULL, NULL, NULL);
|
---|
2724 | /* Cache them for elf_link_input_bfd. */
|
---|
2725 | symtab_hdr->contents = (unsigned char *) local_syms;
|
---|
2726 | }
|
---|
2727 | if (local_syms == NULL)
|
---|
2728 | return -1;
|
---|
2729 |
|
---|
2730 | all_local_syms[bfd_indx] = local_syms;
|
---|
2731 |
|
---|
2732 | if (bfd_link_pic (info) && htab->multi_subspace)
|
---|
2733 | {
|
---|
2734 | struct elf_link_hash_entry **eh_syms;
|
---|
2735 | struct elf_link_hash_entry **eh_symend;
|
---|
2736 | unsigned int symcount;
|
---|
2737 |
|
---|
2738 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
---|
2739 | - symtab_hdr->sh_info);
|
---|
2740 | eh_syms = (struct elf_link_hash_entry **) elf_sym_hashes (input_bfd);
|
---|
2741 | eh_symend = (struct elf_link_hash_entry **) (eh_syms + symcount);
|
---|
2742 |
|
---|
2743 | /* Look through the global syms for functions; We need to
|
---|
2744 | build export stubs for all globally visible functions. */
|
---|
2745 | for (; eh_syms < eh_symend; eh_syms++)
|
---|
2746 | {
|
---|
2747 | struct elf32_hppa_link_hash_entry *hh;
|
---|
2748 |
|
---|
2749 | hh = hppa_elf_hash_entry (*eh_syms);
|
---|
2750 |
|
---|
2751 | while (hh->eh.root.type == bfd_link_hash_indirect
|
---|
2752 | || hh->eh.root.type == bfd_link_hash_warning)
|
---|
2753 | hh = hppa_elf_hash_entry (hh->eh.root.u.i.link);
|
---|
2754 |
|
---|
2755 | /* At this point in the link, undefined syms have been
|
---|
2756 | resolved, so we need to check that the symbol was
|
---|
2757 | defined in this BFD. */
|
---|
2758 | if ((hh->eh.root.type == bfd_link_hash_defined
|
---|
2759 | || hh->eh.root.type == bfd_link_hash_defweak)
|
---|
2760 | && hh->eh.type == STT_FUNC
|
---|
2761 | && hh->eh.root.u.def.section->output_section != NULL
|
---|
2762 | && (hh->eh.root.u.def.section->output_section->owner
|
---|
2763 | == output_bfd)
|
---|
2764 | && hh->eh.root.u.def.section->owner == input_bfd
|
---|
2765 | && hh->eh.def_regular
|
---|
2766 | && !hh->eh.forced_local
|
---|
2767 | && ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT)
|
---|
2768 | {
|
---|
2769 | asection *sec;
|
---|
2770 | const char *stub_name;
|
---|
2771 | struct elf32_hppa_stub_hash_entry *hsh;
|
---|
2772 |
|
---|
2773 | sec = hh->eh.root.u.def.section;
|
---|
2774 | stub_name = hh_name (hh);
|
---|
2775 | hsh = hppa_stub_hash_lookup (&htab->bstab,
|
---|
2776 | stub_name,
|
---|
2777 | FALSE, FALSE);
|
---|
2778 | if (hsh == NULL)
|
---|
2779 | {
|
---|
2780 | hsh = hppa_add_stub (stub_name, sec, htab);
|
---|
2781 | if (!hsh)
|
---|
2782 | return -1;
|
---|
2783 |
|
---|
2784 | hsh->target_value = hh->eh.root.u.def.value;
|
---|
2785 | hsh->target_section = hh->eh.root.u.def.section;
|
---|
2786 | hsh->stub_type = hppa_stub_export;
|
---|
2787 | hsh->hh = hh;
|
---|
2788 | stub_changed = 1;
|
---|
2789 | }
|
---|
2790 | else
|
---|
2791 | {
|
---|
2792 | (*_bfd_error_handler) (_("%B: duplicate export stub %s"),
|
---|
2793 | input_bfd,
|
---|
2794 | stub_name);
|
---|
2795 | }
|
---|
2796 | }
|
---|
2797 | }
|
---|
2798 | }
|
---|
2799 | }
|
---|
2800 |
|
---|
2801 | return stub_changed;
|
---|
2802 | }
|
---|
2803 |
|
---|
2804 | /* Determine and set the size of the stub section for a final link.
|
---|
2805 |
|
---|
2806 | The basic idea here is to examine all the relocations looking for
|
---|
2807 | PC-relative calls to a target that is unreachable with a "bl"
|
---|
2808 | instruction. */
|
---|
2809 |
|
---|
2810 | bfd_boolean
|
---|
2811 | elf32_hppa_size_stubs
|
---|
2812 | (bfd *output_bfd, bfd *stub_bfd, struct bfd_link_info *info,
|
---|
2813 | bfd_boolean multi_subspace, bfd_signed_vma group_size,
|
---|
2814 | asection * (*add_stub_section) (const char *, asection *),
|
---|
2815 | void (*layout_sections_again) (void))
|
---|
2816 | {
|
---|
2817 | bfd_size_type stub_group_size;
|
---|
2818 | bfd_boolean stubs_always_before_branch;
|
---|
2819 | bfd_boolean stub_changed;
|
---|
2820 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
|
---|
2821 |
|
---|
2822 | if (htab == NULL)
|
---|
2823 | return FALSE;
|
---|
2824 |
|
---|
2825 | /* Stash our params away. */
|
---|
2826 | htab->stub_bfd = stub_bfd;
|
---|
2827 | htab->multi_subspace = multi_subspace;
|
---|
2828 | htab->add_stub_section = add_stub_section;
|
---|
2829 | htab->layout_sections_again = layout_sections_again;
|
---|
2830 | stubs_always_before_branch = group_size < 0;
|
---|
2831 | if (group_size < 0)
|
---|
2832 | stub_group_size = -group_size;
|
---|
2833 | else
|
---|
2834 | stub_group_size = group_size;
|
---|
2835 | if (stub_group_size == 1)
|
---|
2836 | {
|
---|
2837 | /* Default values. */
|
---|
2838 | if (stubs_always_before_branch)
|
---|
2839 | {
|
---|
2840 | stub_group_size = 7680000;
|
---|
2841 | if (htab->has_17bit_branch || htab->multi_subspace)
|
---|
2842 | stub_group_size = 240000;
|
---|
2843 | if (htab->has_12bit_branch)
|
---|
2844 | stub_group_size = 7500;
|
---|
2845 | }
|
---|
2846 | else
|
---|
2847 | {
|
---|
2848 | stub_group_size = 6971392;
|
---|
2849 | if (htab->has_17bit_branch || htab->multi_subspace)
|
---|
2850 | stub_group_size = 217856;
|
---|
2851 | if (htab->has_12bit_branch)
|
---|
2852 | stub_group_size = 6808;
|
---|
2853 | }
|
---|
2854 | }
|
---|
2855 |
|
---|
2856 | group_sections (htab, stub_group_size, stubs_always_before_branch);
|
---|
2857 |
|
---|
2858 | switch (get_local_syms (output_bfd, info->input_bfds, info))
|
---|
2859 | {
|
---|
2860 | default:
|
---|
2861 | if (htab->all_local_syms)
|
---|
2862 | goto error_ret_free_local;
|
---|
2863 | return FALSE;
|
---|
2864 |
|
---|
2865 | case 0:
|
---|
2866 | stub_changed = FALSE;
|
---|
2867 | break;
|
---|
2868 |
|
---|
2869 | case 1:
|
---|
2870 | stub_changed = TRUE;
|
---|
2871 | break;
|
---|
2872 | }
|
---|
2873 |
|
---|
2874 | while (1)
|
---|
2875 | {
|
---|
2876 | bfd *input_bfd;
|
---|
2877 | unsigned int bfd_indx;
|
---|
2878 | asection *stub_sec;
|
---|
2879 |
|
---|
2880 | for (input_bfd = info->input_bfds, bfd_indx = 0;
|
---|
2881 | input_bfd != NULL;
|
---|
2882 | input_bfd = input_bfd->link.next, bfd_indx++)
|
---|
2883 | {
|
---|
2884 | Elf_Internal_Shdr *symtab_hdr;
|
---|
2885 | asection *section;
|
---|
2886 | Elf_Internal_Sym *local_syms;
|
---|
2887 |
|
---|
2888 | /* We'll need the symbol table in a second. */
|
---|
2889 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
---|
2890 | if (symtab_hdr->sh_info == 0)
|
---|
2891 | continue;
|
---|
2892 |
|
---|
2893 | local_syms = htab->all_local_syms[bfd_indx];
|
---|
2894 |
|
---|
2895 | /* Walk over each section attached to the input bfd. */
|
---|
2896 | for (section = input_bfd->sections;
|
---|
2897 | section != NULL;
|
---|
2898 | section = section->next)
|
---|
2899 | {
|
---|
2900 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
|
---|
2901 |
|
---|
2902 | /* If there aren't any relocs, then there's nothing more
|
---|
2903 | to do. */
|
---|
2904 | if ((section->flags & SEC_RELOC) == 0
|
---|
2905 | || section->reloc_count == 0)
|
---|
2906 | continue;
|
---|
2907 |
|
---|
2908 | /* If this section is a link-once section that will be
|
---|
2909 | discarded, then don't create any stubs. */
|
---|
2910 | if (section->output_section == NULL
|
---|
2911 | || section->output_section->owner != output_bfd)
|
---|
2912 | continue;
|
---|
2913 |
|
---|
2914 | /* Get the relocs. */
|
---|
2915 | internal_relocs
|
---|
2916 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
|
---|
2917 | info->keep_memory);
|
---|
2918 | if (internal_relocs == NULL)
|
---|
2919 | goto error_ret_free_local;
|
---|
2920 |
|
---|
2921 | /* Now examine each relocation. */
|
---|
2922 | irela = internal_relocs;
|
---|
2923 | irelaend = irela + section->reloc_count;
|
---|
2924 | for (; irela < irelaend; irela++)
|
---|
2925 | {
|
---|
2926 | unsigned int r_type, r_indx;
|
---|
2927 | enum elf32_hppa_stub_type stub_type;
|
---|
2928 | struct elf32_hppa_stub_hash_entry *hsh;
|
---|
2929 | asection *sym_sec;
|
---|
2930 | bfd_vma sym_value;
|
---|
2931 | bfd_vma destination;
|
---|
2932 | struct elf32_hppa_link_hash_entry *hh;
|
---|
2933 | char *stub_name;
|
---|
2934 | const asection *id_sec;
|
---|
2935 |
|
---|
2936 | r_type = ELF32_R_TYPE (irela->r_info);
|
---|
2937 | r_indx = ELF32_R_SYM (irela->r_info);
|
---|
2938 |
|
---|
2939 | if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
|
---|
2940 | {
|
---|
2941 | bfd_set_error (bfd_error_bad_value);
|
---|
2942 | error_ret_free_internal:
|
---|
2943 | if (elf_section_data (section)->relocs == NULL)
|
---|
2944 | free (internal_relocs);
|
---|
2945 | goto error_ret_free_local;
|
---|
2946 | }
|
---|
2947 |
|
---|
2948 | /* Only look for stubs on call instructions. */
|
---|
2949 | if (r_type != (unsigned int) R_PARISC_PCREL12F
|
---|
2950 | && r_type != (unsigned int) R_PARISC_PCREL17F
|
---|
2951 | && r_type != (unsigned int) R_PARISC_PCREL22F)
|
---|
2952 | continue;
|
---|
2953 |
|
---|
2954 | /* Now determine the call target, its name, value,
|
---|
2955 | section. */
|
---|
2956 | sym_sec = NULL;
|
---|
2957 | sym_value = 0;
|
---|
2958 | destination = 0;
|
---|
2959 | hh = NULL;
|
---|
2960 | if (r_indx < symtab_hdr->sh_info)
|
---|
2961 | {
|
---|
2962 | /* It's a local symbol. */
|
---|
2963 | Elf_Internal_Sym *sym;
|
---|
2964 | Elf_Internal_Shdr *hdr;
|
---|
2965 | unsigned int shndx;
|
---|
2966 |
|
---|
2967 | sym = local_syms + r_indx;
|
---|
2968 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
---|
2969 | sym_value = sym->st_value;
|
---|
2970 | shndx = sym->st_shndx;
|
---|
2971 | if (shndx < elf_numsections (input_bfd))
|
---|
2972 | {
|
---|
2973 | hdr = elf_elfsections (input_bfd)[shndx];
|
---|
2974 | sym_sec = hdr->bfd_section;
|
---|
2975 | destination = (sym_value + irela->r_addend
|
---|
2976 | + sym_sec->output_offset
|
---|
2977 | + sym_sec->output_section->vma);
|
---|
2978 | }
|
---|
2979 | }
|
---|
2980 | else
|
---|
2981 | {
|
---|
2982 | /* It's an external symbol. */
|
---|
2983 | int e_indx;
|
---|
2984 |
|
---|
2985 | e_indx = r_indx - symtab_hdr->sh_info;
|
---|
2986 | hh = hppa_elf_hash_entry (elf_sym_hashes (input_bfd)[e_indx]);
|
---|
2987 |
|
---|
2988 | while (hh->eh.root.type == bfd_link_hash_indirect
|
---|
2989 | || hh->eh.root.type == bfd_link_hash_warning)
|
---|
2990 | hh = hppa_elf_hash_entry (hh->eh.root.u.i.link);
|
---|
2991 |
|
---|
2992 | if (hh->eh.root.type == bfd_link_hash_defined
|
---|
2993 | || hh->eh.root.type == bfd_link_hash_defweak)
|
---|
2994 | {
|
---|
2995 | sym_sec = hh->eh.root.u.def.section;
|
---|
2996 | sym_value = hh->eh.root.u.def.value;
|
---|
2997 | if (sym_sec->output_section != NULL)
|
---|
2998 | destination = (sym_value + irela->r_addend
|
---|
2999 | + sym_sec->output_offset
|
---|
3000 | + sym_sec->output_section->vma);
|
---|
3001 | }
|
---|
3002 | else if (hh->eh.root.type == bfd_link_hash_undefweak)
|
---|
3003 | {
|
---|
3004 | if (! bfd_link_pic (info))
|
---|
3005 | continue;
|
---|
3006 | }
|
---|
3007 | else if (hh->eh.root.type == bfd_link_hash_undefined)
|
---|
3008 | {
|
---|
3009 | if (! (info->unresolved_syms_in_objects == RM_IGNORE
|
---|
3010 | && (ELF_ST_VISIBILITY (hh->eh.other)
|
---|
3011 | == STV_DEFAULT)
|
---|
3012 | && hh->eh.type != STT_PARISC_MILLI))
|
---|
3013 | continue;
|
---|
3014 | }
|
---|
3015 | else
|
---|
3016 | {
|
---|
3017 | bfd_set_error (bfd_error_bad_value);
|
---|
3018 | goto error_ret_free_internal;
|
---|
3019 | }
|
---|
3020 | }
|
---|
3021 |
|
---|
3022 | /* Determine what (if any) linker stub is needed. */
|
---|
3023 | stub_type = hppa_type_of_stub (section, irela, hh,
|
---|
3024 | destination, info);
|
---|
3025 | if (stub_type == hppa_stub_none)
|
---|
3026 | continue;
|
---|
3027 |
|
---|
3028 | /* Support for grouping stub sections. */
|
---|
3029 | id_sec = htab->stub_group[section->id].link_sec;
|
---|
3030 |
|
---|
3031 | /* Get the name of this stub. */
|
---|
3032 | stub_name = hppa_stub_name (id_sec, sym_sec, hh, irela);
|
---|
3033 | if (!stub_name)
|
---|
3034 | goto error_ret_free_internal;
|
---|
3035 |
|
---|
3036 | hsh = hppa_stub_hash_lookup (&htab->bstab,
|
---|
3037 | stub_name,
|
---|
3038 | FALSE, FALSE);
|
---|
3039 | if (hsh != NULL)
|
---|
3040 | {
|
---|
3041 | /* The proper stub has already been created. */
|
---|
3042 | free (stub_name);
|
---|
3043 | continue;
|
---|
3044 | }
|
---|
3045 |
|
---|
3046 | hsh = hppa_add_stub (stub_name, section, htab);
|
---|
3047 | if (hsh == NULL)
|
---|
3048 | {
|
---|
3049 | free (stub_name);
|
---|
3050 | goto error_ret_free_internal;
|
---|
3051 | }
|
---|
3052 |
|
---|
3053 | hsh->target_value = sym_value;
|
---|
3054 | hsh->target_section = sym_sec;
|
---|
3055 | hsh->stub_type = stub_type;
|
---|
3056 | if (bfd_link_pic (info))
|
---|
3057 | {
|
---|
3058 | if (stub_type == hppa_stub_import)
|
---|
3059 | hsh->stub_type = hppa_stub_import_shared;
|
---|
3060 | else if (stub_type == hppa_stub_long_branch)
|
---|
3061 | hsh->stub_type = hppa_stub_long_branch_shared;
|
---|
3062 | }
|
---|
3063 | hsh->hh = hh;
|
---|
3064 | stub_changed = TRUE;
|
---|
3065 | }
|
---|
3066 |
|
---|
3067 | /* We're done with the internal relocs, free them. */
|
---|
3068 | if (elf_section_data (section)->relocs == NULL)
|
---|
3069 | free (internal_relocs);
|
---|
3070 | }
|
---|
3071 | }
|
---|
3072 |
|
---|
3073 | if (!stub_changed)
|
---|
3074 | break;
|
---|
3075 |
|
---|
3076 | /* OK, we've added some stubs. Find out the new size of the
|
---|
3077 | stub sections. */
|
---|
3078 | for (stub_sec = htab->stub_bfd->sections;
|
---|
3079 | stub_sec != NULL;
|
---|
3080 | stub_sec = stub_sec->next)
|
---|
3081 | if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
|
---|
3082 | stub_sec->size = 0;
|
---|
3083 |
|
---|
3084 | bfd_hash_traverse (&htab->bstab, hppa_size_one_stub, htab);
|
---|
3085 |
|
---|
3086 | /* Ask the linker to do its stuff. */
|
---|
3087 | (*htab->layout_sections_again) ();
|
---|
3088 | stub_changed = FALSE;
|
---|
3089 | }
|
---|
3090 |
|
---|
3091 | free (htab->all_local_syms);
|
---|
3092 | return TRUE;
|
---|
3093 |
|
---|
3094 | error_ret_free_local:
|
---|
3095 | free (htab->all_local_syms);
|
---|
3096 | return FALSE;
|
---|
3097 | }
|
---|
3098 |
|
---|
3099 | /* For a final link, this function is called after we have sized the
|
---|
3100 | stubs to provide a value for __gp. */
|
---|
3101 |
|
---|
3102 | bfd_boolean
|
---|
3103 | elf32_hppa_set_gp (bfd *abfd, struct bfd_link_info *info)
|
---|
3104 | {
|
---|
3105 | struct bfd_link_hash_entry *h;
|
---|
3106 | asection *sec = NULL;
|
---|
3107 | bfd_vma gp_val = 0;
|
---|
3108 | struct elf32_hppa_link_hash_table *htab;
|
---|
3109 |
|
---|
3110 | htab = hppa_link_hash_table (info);
|
---|
3111 | if (htab == NULL)
|
---|
3112 | return FALSE;
|
---|
3113 |
|
---|
3114 | h = bfd_link_hash_lookup (&htab->etab.root, "$global$", FALSE, FALSE, FALSE);
|
---|
3115 |
|
---|
3116 | if (h != NULL
|
---|
3117 | && (h->type == bfd_link_hash_defined
|
---|
3118 | || h->type == bfd_link_hash_defweak))
|
---|
3119 | {
|
---|
3120 | gp_val = h->u.def.value;
|
---|
3121 | sec = h->u.def.section;
|
---|
3122 | }
|
---|
3123 | else
|
---|
3124 | {
|
---|
3125 | asection *splt = bfd_get_section_by_name (abfd, ".plt");
|
---|
3126 | asection *sgot = bfd_get_section_by_name (abfd, ".got");
|
---|
3127 |
|
---|
3128 | /* Choose to point our LTP at, in this order, one of .plt, .got,
|
---|
3129 | or .data, if these sections exist. In the case of choosing
|
---|
3130 | .plt try to make the LTP ideal for addressing anywhere in the
|
---|
3131 | .plt or .got with a 14 bit signed offset. Typically, the end
|
---|
3132 | of the .plt is the start of the .got, so choose .plt + 0x2000
|
---|
3133 | if either the .plt or .got is larger than 0x2000. If both
|
---|
3134 | the .plt and .got are smaller than 0x2000, choose the end of
|
---|
3135 | the .plt section. */
|
---|
3136 | sec = strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") == 0
|
---|
3137 | ? NULL : splt;
|
---|
3138 | if (sec != NULL)
|
---|
3139 | {
|
---|
3140 | gp_val = sec->size;
|
---|
3141 | if (gp_val > 0x2000 || (sgot && sgot->size > 0x2000))
|
---|
3142 | {
|
---|
3143 | gp_val = 0x2000;
|
---|
3144 | }
|
---|
3145 | }
|
---|
3146 | else
|
---|
3147 | {
|
---|
3148 | sec = sgot;
|
---|
3149 | if (sec != NULL)
|
---|
3150 | {
|
---|
3151 | if (strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") != 0)
|
---|
3152 | {
|
---|
3153 | /* We know we don't have a .plt. If .got is large,
|
---|
3154 | offset our LTP. */
|
---|
3155 | if (sec->size > 0x2000)
|
---|
3156 | gp_val = 0x2000;
|
---|
3157 | }
|
---|
3158 | }
|
---|
3159 | else
|
---|
3160 | {
|
---|
3161 | /* No .plt or .got. Who cares what the LTP is? */
|
---|
3162 | sec = bfd_get_section_by_name (abfd, ".data");
|
---|
3163 | }
|
---|
3164 | }
|
---|
3165 |
|
---|
3166 | if (h != NULL)
|
---|
3167 | {
|
---|
3168 | h->type = bfd_link_hash_defined;
|
---|
3169 | h->u.def.value = gp_val;
|
---|
3170 | if (sec != NULL)
|
---|
3171 | h->u.def.section = sec;
|
---|
3172 | else
|
---|
3173 | h->u.def.section = bfd_abs_section_ptr;
|
---|
3174 | }
|
---|
3175 | }
|
---|
3176 |
|
---|
3177 | if (sec != NULL && sec->output_section != NULL)
|
---|
3178 | gp_val += sec->output_section->vma + sec->output_offset;
|
---|
3179 |
|
---|
3180 | elf_gp (abfd) = gp_val;
|
---|
3181 | return TRUE;
|
---|
3182 | }
|
---|
3183 |
|
---|
3184 | /* Build all the stubs associated with the current output file. The
|
---|
3185 | stubs are kept in a hash table attached to the main linker hash
|
---|
3186 | table. We also set up the .plt entries for statically linked PIC
|
---|
3187 | functions here. This function is called via hppaelf_finish in the
|
---|
3188 | linker. */
|
---|
3189 |
|
---|
3190 | bfd_boolean
|
---|
3191 | elf32_hppa_build_stubs (struct bfd_link_info *info)
|
---|
3192 | {
|
---|
3193 | asection *stub_sec;
|
---|
3194 | struct bfd_hash_table *table;
|
---|
3195 | struct elf32_hppa_link_hash_table *htab;
|
---|
3196 |
|
---|
3197 | htab = hppa_link_hash_table (info);
|
---|
3198 | if (htab == NULL)
|
---|
3199 | return FALSE;
|
---|
3200 |
|
---|
3201 | for (stub_sec = htab->stub_bfd->sections;
|
---|
3202 | stub_sec != NULL;
|
---|
3203 | stub_sec = stub_sec->next)
|
---|
3204 | if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
|
---|
3205 | && stub_sec->size != 0)
|
---|
3206 | {
|
---|
3207 | /* Allocate memory to hold the linker stubs. */
|
---|
3208 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
|
---|
3209 | if (stub_sec->contents == NULL)
|
---|
3210 | return FALSE;
|
---|
3211 | stub_sec->size = 0;
|
---|
3212 | }
|
---|
3213 |
|
---|
3214 | /* Build the stubs as directed by the stub hash table. */
|
---|
3215 | table = &htab->bstab;
|
---|
3216 | bfd_hash_traverse (table, hppa_build_one_stub, info);
|
---|
3217 |
|
---|
3218 | return TRUE;
|
---|
3219 | }
|
---|
3220 |
|
---|
3221 | /* Return the base vma address which should be subtracted from the real
|
---|
3222 | address when resolving a dtpoff relocation.
|
---|
3223 | This is PT_TLS segment p_vaddr. */
|
---|
3224 |
|
---|
3225 | static bfd_vma
|
---|
3226 | dtpoff_base (struct bfd_link_info *info)
|
---|
3227 | {
|
---|
3228 | /* If tls_sec is NULL, we should have signalled an error already. */
|
---|
3229 | if (elf_hash_table (info)->tls_sec == NULL)
|
---|
3230 | return 0;
|
---|
3231 | return elf_hash_table (info)->tls_sec->vma;
|
---|
3232 | }
|
---|
3233 |
|
---|
3234 | /* Return the relocation value for R_PARISC_TLS_TPOFF*.. */
|
---|
3235 |
|
---|
3236 | static bfd_vma
|
---|
3237 | tpoff (struct bfd_link_info *info, bfd_vma address)
|
---|
3238 | {
|
---|
3239 | struct elf_link_hash_table *htab = elf_hash_table (info);
|
---|
3240 |
|
---|
3241 | /* If tls_sec is NULL, we should have signalled an error already. */
|
---|
3242 | if (htab->tls_sec == NULL)
|
---|
3243 | return 0;
|
---|
3244 | /* hppa TLS ABI is variant I and static TLS block start just after
|
---|
3245 | tcbhead structure which has 2 pointer fields. */
|
---|
3246 | return (address - htab->tls_sec->vma
|
---|
3247 | + align_power ((bfd_vma) 8, htab->tls_sec->alignment_power));
|
---|
3248 | }
|
---|
3249 |
|
---|
3250 | /* Perform a final link. */
|
---|
3251 |
|
---|
3252 | static bfd_boolean
|
---|
3253 | elf32_hppa_final_link (bfd *abfd, struct bfd_link_info *info)
|
---|
3254 | {
|
---|
3255 | struct stat buf;
|
---|
3256 |
|
---|
3257 | /* Invoke the regular ELF linker to do all the work. */
|
---|
3258 | if (!bfd_elf_final_link (abfd, info))
|
---|
3259 | return FALSE;
|
---|
3260 |
|
---|
3261 | /* If we're producing a final executable, sort the contents of the
|
---|
3262 | unwind section. */
|
---|
3263 | if (bfd_link_relocatable (info))
|
---|
3264 | return TRUE;
|
---|
3265 |
|
---|
3266 | /* Do not attempt to sort non-regular files. This is here
|
---|
3267 | especially for configure scripts and kernel builds which run
|
---|
3268 | tests with "ld [...] -o /dev/null". */
|
---|
3269 | if (stat (abfd->filename, &buf) != 0
|
---|
3270 | || !S_ISREG(buf.st_mode))
|
---|
3271 | return TRUE;
|
---|
3272 |
|
---|
3273 | return elf_hppa_sort_unwind (abfd);
|
---|
3274 | }
|
---|
3275 |
|
---|
3276 | /* Record the lowest address for the data and text segments. */
|
---|
3277 |
|
---|
3278 | static void
|
---|
3279 | hppa_record_segment_addr (bfd *abfd, asection *section, void *data)
|
---|
3280 | {
|
---|
3281 | struct elf32_hppa_link_hash_table *htab;
|
---|
3282 |
|
---|
3283 | htab = (struct elf32_hppa_link_hash_table*) data;
|
---|
3284 | if (htab == NULL)
|
---|
3285 | return;
|
---|
3286 |
|
---|
3287 | if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
|
---|
3288 | {
|
---|
3289 | bfd_vma value;
|
---|
3290 | Elf_Internal_Phdr *p;
|
---|
3291 |
|
---|
3292 | p = _bfd_elf_find_segment_containing_section (abfd, section->output_section);
|
---|
3293 | BFD_ASSERT (p != NULL);
|
---|
3294 | value = p->p_vaddr;
|
---|
3295 |
|
---|
3296 | if ((section->flags & SEC_READONLY) != 0)
|
---|
3297 | {
|
---|
3298 | if (value < htab->text_segment_base)
|
---|
3299 | htab->text_segment_base = value;
|
---|
3300 | }
|
---|
3301 | else
|
---|
3302 | {
|
---|
3303 | if (value < htab->data_segment_base)
|
---|
3304 | htab->data_segment_base = value;
|
---|
3305 | }
|
---|
3306 | }
|
---|
3307 | }
|
---|
3308 |
|
---|
3309 | /* Perform a relocation as part of a final link. */
|
---|
3310 |
|
---|
3311 | static bfd_reloc_status_type
|
---|
3312 | final_link_relocate (asection *input_section,
|
---|
3313 | bfd_byte *contents,
|
---|
3314 | const Elf_Internal_Rela *rela,
|
---|
3315 | bfd_vma value,
|
---|
3316 | struct elf32_hppa_link_hash_table *htab,
|
---|
3317 | asection *sym_sec,
|
---|
3318 | struct elf32_hppa_link_hash_entry *hh,
|
---|
3319 | struct bfd_link_info *info)
|
---|
3320 | {
|
---|
3321 | int insn;
|
---|
3322 | unsigned int r_type = ELF32_R_TYPE (rela->r_info);
|
---|
3323 | unsigned int orig_r_type = r_type;
|
---|
3324 | reloc_howto_type *howto = elf_hppa_howto_table + r_type;
|
---|
3325 | int r_format = howto->bitsize;
|
---|
3326 | enum hppa_reloc_field_selector_type_alt r_field;
|
---|
3327 | bfd *input_bfd = input_section->owner;
|
---|
3328 | bfd_vma offset = rela->r_offset;
|
---|
3329 | bfd_vma max_branch_offset = 0;
|
---|
3330 | bfd_byte *hit_data = contents + offset;
|
---|
3331 | bfd_signed_vma addend = rela->r_addend;
|
---|
3332 | bfd_vma location;
|
---|
3333 | struct elf32_hppa_stub_hash_entry *hsh = NULL;
|
---|
3334 | int val;
|
---|
3335 |
|
---|
3336 | if (r_type == R_PARISC_NONE)
|
---|
3337 | return bfd_reloc_ok;
|
---|
3338 |
|
---|
3339 | insn = bfd_get_32 (input_bfd, hit_data);
|
---|
3340 |
|
---|
3341 | /* Find out where we are and where we're going. */
|
---|
3342 | location = (offset +
|
---|
3343 | input_section->output_offset +
|
---|
3344 | input_section->output_section->vma);
|
---|
3345 |
|
---|
3346 | /* If we are not building a shared library, convert DLTIND relocs to
|
---|
3347 | DPREL relocs. */
|
---|
3348 | if (!bfd_link_pic (info))
|
---|
3349 | {
|
---|
3350 | switch (r_type)
|
---|
3351 | {
|
---|
3352 | case R_PARISC_DLTIND21L:
|
---|
3353 | case R_PARISC_TLS_GD21L:
|
---|
3354 | case R_PARISC_TLS_LDM21L:
|
---|
3355 | case R_PARISC_TLS_IE21L:
|
---|
3356 | r_type = R_PARISC_DPREL21L;
|
---|
3357 | break;
|
---|
3358 |
|
---|
3359 | case R_PARISC_DLTIND14R:
|
---|
3360 | case R_PARISC_TLS_GD14R:
|
---|
3361 | case R_PARISC_TLS_LDM14R:
|
---|
3362 | case R_PARISC_TLS_IE14R:
|
---|
3363 | r_type = R_PARISC_DPREL14R;
|
---|
3364 | break;
|
---|
3365 |
|
---|
3366 | case R_PARISC_DLTIND14F:
|
---|
3367 | r_type = R_PARISC_DPREL14F;
|
---|
3368 | break;
|
---|
3369 | }
|
---|
3370 | }
|
---|
3371 |
|
---|
3372 | switch (r_type)
|
---|
3373 | {
|
---|
3374 | case R_PARISC_PCREL12F:
|
---|
3375 | case R_PARISC_PCREL17F:
|
---|
3376 | case R_PARISC_PCREL22F:
|
---|
3377 | /* If this call should go via the plt, find the import stub in
|
---|
3378 | the stub hash. */
|
---|
3379 | if (sym_sec == NULL
|
---|
3380 | || sym_sec->output_section == NULL
|
---|
3381 | || (hh != NULL
|
---|
3382 | && hh->eh.plt.offset != (bfd_vma) -1
|
---|
3383 | && hh->eh.dynindx != -1
|
---|
3384 | && !hh->plabel
|
---|
3385 | && (bfd_link_pic (info)
|
---|
3386 | || !hh->eh.def_regular
|
---|
3387 | || hh->eh.root.type == bfd_link_hash_defweak)))
|
---|
3388 | {
|
---|
3389 | hsh = hppa_get_stub_entry (input_section, sym_sec,
|
---|
3390 | hh, rela, htab);
|
---|
3391 | if (hsh != NULL)
|
---|
3392 | {
|
---|
3393 | value = (hsh->stub_offset
|
---|
3394 | + hsh->stub_sec->output_offset
|
---|
3395 | + hsh->stub_sec->output_section->vma);
|
---|
3396 | addend = 0;
|
---|
3397 | }
|
---|
3398 | else if (sym_sec == NULL && hh != NULL
|
---|
3399 | && hh->eh.root.type == bfd_link_hash_undefweak)
|
---|
3400 | {
|
---|
3401 | /* It's OK if undefined weak. Calls to undefined weak
|
---|
3402 | symbols behave as if the "called" function
|
---|
3403 | immediately returns. We can thus call to a weak
|
---|
3404 | function without first checking whether the function
|
---|
3405 | is defined. */
|
---|
3406 | value = location;
|
---|
3407 | addend = 8;
|
---|
3408 | }
|
---|
3409 | else
|
---|
3410 | return bfd_reloc_undefined;
|
---|
3411 | }
|
---|
3412 | /* Fall thru. */
|
---|
3413 |
|
---|
3414 | case R_PARISC_PCREL21L:
|
---|
3415 | case R_PARISC_PCREL17C:
|
---|
3416 | case R_PARISC_PCREL17R:
|
---|
3417 | case R_PARISC_PCREL14R:
|
---|
3418 | case R_PARISC_PCREL14F:
|
---|
3419 | case R_PARISC_PCREL32:
|
---|
3420 | /* Make it a pc relative offset. */
|
---|
3421 | value -= location;
|
---|
3422 | addend -= 8;
|
---|
3423 | break;
|
---|
3424 |
|
---|
3425 | case R_PARISC_DPREL21L:
|
---|
3426 | case R_PARISC_DPREL14R:
|
---|
3427 | case R_PARISC_DPREL14F:
|
---|
3428 | /* Convert instructions that use the linkage table pointer (r19) to
|
---|
3429 | instructions that use the global data pointer (dp). This is the
|
---|
3430 | most efficient way of using PIC code in an incomplete executable,
|
---|
3431 | but the user must follow the standard runtime conventions for
|
---|
3432 | accessing data for this to work. */
|
---|
3433 | if (orig_r_type != r_type)
|
---|
3434 | {
|
---|
3435 | if (r_type == R_PARISC_DPREL21L)
|
---|
3436 | {
|
---|
3437 | /* GCC sometimes uses a register other than r19 for the
|
---|
3438 | operation, so we must convert any addil instruction
|
---|
3439 | that uses this relocation. */
|
---|
3440 | if ((insn & 0xfc000000) == ((int) OP_ADDIL << 26))
|
---|
3441 | insn = ADDIL_DP;
|
---|
3442 | else
|
---|
3443 | /* We must have a ldil instruction. It's too hard to find
|
---|
3444 | and convert the associated add instruction, so issue an
|
---|
3445 | error. */
|
---|
3446 | (*_bfd_error_handler)
|
---|
3447 | (_("%B(%A+0x%lx): %s fixup for insn 0x%x is not supported in a non-shared link"),
|
---|
3448 | input_bfd,
|
---|
3449 | input_section,
|
---|
3450 | (long) offset,
|
---|
3451 | howto->name,
|
---|
3452 | insn);
|
---|
3453 | }
|
---|
3454 | else if (r_type == R_PARISC_DPREL14F)
|
---|
3455 | {
|
---|
3456 | /* This must be a format 1 load/store. Change the base
|
---|
3457 | register to dp. */
|
---|
3458 | insn = (insn & 0xfc1ffff) | (27 << 21);
|
---|
3459 | }
|
---|
3460 | }
|
---|
3461 |
|
---|
3462 | /* For all the DP relative relocations, we need to examine the symbol's
|
---|
3463 | section. If it has no section or if it's a code section, then
|
---|
3464 | "data pointer relative" makes no sense. In that case we don't
|
---|
3465 | adjust the "value", and for 21 bit addil instructions, we change the
|
---|
3466 | source addend register from %dp to %r0. This situation commonly
|
---|
3467 | arises for undefined weak symbols and when a variable's "constness"
|
---|
3468 | is declared differently from the way the variable is defined. For
|
---|
3469 | instance: "extern int foo" with foo defined as "const int foo". */
|
---|
3470 | if (sym_sec == NULL || (sym_sec->flags & SEC_CODE) != 0)
|
---|
3471 | {
|
---|
3472 | if ((insn & ((0x3f << 26) | (0x1f << 21)))
|
---|
3473 | == (((int) OP_ADDIL << 26) | (27 << 21)))
|
---|
3474 | {
|
---|
3475 | insn &= ~ (0x1f << 21);
|
---|
3476 | }
|
---|
3477 | /* Now try to make things easy for the dynamic linker. */
|
---|
3478 |
|
---|
3479 | break;
|
---|
3480 | }
|
---|
3481 | /* Fall thru. */
|
---|
3482 |
|
---|
3483 | case R_PARISC_DLTIND21L:
|
---|
3484 | case R_PARISC_DLTIND14R:
|
---|
3485 | case R_PARISC_DLTIND14F:
|
---|
3486 | case R_PARISC_TLS_GD21L:
|
---|
3487 | case R_PARISC_TLS_LDM21L:
|
---|
3488 | case R_PARISC_TLS_IE21L:
|
---|
3489 | case R_PARISC_TLS_GD14R:
|
---|
3490 | case R_PARISC_TLS_LDM14R:
|
---|
3491 | case R_PARISC_TLS_IE14R:
|
---|
3492 | value -= elf_gp (input_section->output_section->owner);
|
---|
3493 | break;
|
---|
3494 |
|
---|
3495 | case R_PARISC_SEGREL32:
|
---|
3496 | if ((sym_sec->flags & SEC_CODE) != 0)
|
---|
3497 | value -= htab->text_segment_base;
|
---|
3498 | else
|
---|
3499 | value -= htab->data_segment_base;
|
---|
3500 | break;
|
---|
3501 |
|
---|
3502 | default:
|
---|
3503 | break;
|
---|
3504 | }
|
---|
3505 |
|
---|
3506 | switch (r_type)
|
---|
3507 | {
|
---|
3508 | case R_PARISC_DIR32:
|
---|
3509 | case R_PARISC_DIR14F:
|
---|
3510 | case R_PARISC_DIR17F:
|
---|
3511 | case R_PARISC_PCREL17C:
|
---|
3512 | case R_PARISC_PCREL14F:
|
---|
3513 | case R_PARISC_PCREL32:
|
---|
3514 | case R_PARISC_DPREL14F:
|
---|
3515 | case R_PARISC_PLABEL32:
|
---|
3516 | case R_PARISC_DLTIND14F:
|
---|
3517 | case R_PARISC_SEGBASE:
|
---|
3518 | case R_PARISC_SEGREL32:
|
---|
3519 | case R_PARISC_TLS_DTPMOD32:
|
---|
3520 | case R_PARISC_TLS_DTPOFF32:
|
---|
3521 | case R_PARISC_TLS_TPREL32:
|
---|
3522 | r_field = e_fsel;
|
---|
3523 | break;
|
---|
3524 |
|
---|
3525 | case R_PARISC_DLTIND21L:
|
---|
3526 | case R_PARISC_PCREL21L:
|
---|
3527 | case R_PARISC_PLABEL21L:
|
---|
3528 | r_field = e_lsel;
|
---|
3529 | break;
|
---|
3530 |
|
---|
3531 | case R_PARISC_DIR21L:
|
---|
3532 | case R_PARISC_DPREL21L:
|
---|
3533 | case R_PARISC_TLS_GD21L:
|
---|
3534 | case R_PARISC_TLS_LDM21L:
|
---|
3535 | case R_PARISC_TLS_LDO21L:
|
---|
3536 | case R_PARISC_TLS_IE21L:
|
---|
3537 | case R_PARISC_TLS_LE21L:
|
---|
3538 | r_field = e_lrsel;
|
---|
3539 | break;
|
---|
3540 |
|
---|
3541 | case R_PARISC_PCREL17R:
|
---|
3542 | case R_PARISC_PCREL14R:
|
---|
3543 | case R_PARISC_PLABEL14R:
|
---|
3544 | case R_PARISC_DLTIND14R:
|
---|
3545 | r_field = e_rsel;
|
---|
3546 | break;
|
---|
3547 |
|
---|
3548 | case R_PARISC_DIR17R:
|
---|
3549 | case R_PARISC_DIR14R:
|
---|
3550 | case R_PARISC_DPREL14R:
|
---|
3551 | case R_PARISC_TLS_GD14R:
|
---|
3552 | case R_PARISC_TLS_LDM14R:
|
---|
3553 | case R_PARISC_TLS_LDO14R:
|
---|
3554 | case R_PARISC_TLS_IE14R:
|
---|
3555 | case R_PARISC_TLS_LE14R:
|
---|
3556 | r_field = e_rrsel;
|
---|
3557 | break;
|
---|
3558 |
|
---|
3559 | case R_PARISC_PCREL12F:
|
---|
3560 | case R_PARISC_PCREL17F:
|
---|
3561 | case R_PARISC_PCREL22F:
|
---|
3562 | r_field = e_fsel;
|
---|
3563 |
|
---|
3564 | if (r_type == (unsigned int) R_PARISC_PCREL17F)
|
---|
3565 | {
|
---|
3566 | max_branch_offset = (1 << (17-1)) << 2;
|
---|
3567 | }
|
---|
3568 | else if (r_type == (unsigned int) R_PARISC_PCREL12F)
|
---|
3569 | {
|
---|
3570 | max_branch_offset = (1 << (12-1)) << 2;
|
---|
3571 | }
|
---|
3572 | else
|
---|
3573 | {
|
---|
3574 | max_branch_offset = (1 << (22-1)) << 2;
|
---|
3575 | }
|
---|
3576 |
|
---|
3577 | /* sym_sec is NULL on undefined weak syms or when shared on
|
---|
3578 | undefined syms. We've already checked for a stub for the
|
---|
3579 | shared undefined case. */
|
---|
3580 | if (sym_sec == NULL)
|
---|
3581 | break;
|
---|
3582 |
|
---|
3583 | /* If the branch is out of reach, then redirect the
|
---|
3584 | call to the local stub for this function. */
|
---|
3585 | if (value + addend + max_branch_offset >= 2*max_branch_offset)
|
---|
3586 | {
|
---|
3587 | hsh = hppa_get_stub_entry (input_section, sym_sec,
|
---|
3588 | hh, rela, htab);
|
---|
3589 | if (hsh == NULL)
|
---|
3590 | return bfd_reloc_undefined;
|
---|
3591 |
|
---|
3592 | /* Munge up the value and addend so that we call the stub
|
---|
3593 | rather than the procedure directly. */
|
---|
3594 | value = (hsh->stub_offset
|
---|
3595 | + hsh->stub_sec->output_offset
|
---|
3596 | + hsh->stub_sec->output_section->vma
|
---|
3597 | - location);
|
---|
3598 | addend = -8;
|
---|
3599 | }
|
---|
3600 | break;
|
---|
3601 |
|
---|
3602 | /* Something we don't know how to handle. */
|
---|
3603 | default:
|
---|
3604 | return bfd_reloc_notsupported;
|
---|
3605 | }
|
---|
3606 |
|
---|
3607 | /* Make sure we can reach the stub. */
|
---|
3608 | if (max_branch_offset != 0
|
---|
3609 | && value + addend + max_branch_offset >= 2*max_branch_offset)
|
---|
3610 | {
|
---|
3611 | (*_bfd_error_handler)
|
---|
3612 | (_("%B(%A+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
|
---|
3613 | input_bfd,
|
---|
3614 | input_section,
|
---|
3615 | (long) offset,
|
---|
3616 | hsh->bh_root.string);
|
---|
3617 | bfd_set_error (bfd_error_bad_value);
|
---|
3618 | return bfd_reloc_notsupported;
|
---|
3619 | }
|
---|
3620 |
|
---|
3621 | val = hppa_field_adjust (value, addend, r_field);
|
---|
3622 |
|
---|
3623 | switch (r_type)
|
---|
3624 | {
|
---|
3625 | case R_PARISC_PCREL12F:
|
---|
3626 | case R_PARISC_PCREL17C:
|
---|
3627 | case R_PARISC_PCREL17F:
|
---|
3628 | case R_PARISC_PCREL17R:
|
---|
3629 | case R_PARISC_PCREL22F:
|
---|
3630 | case R_PARISC_DIR17F:
|
---|
3631 | case R_PARISC_DIR17R:
|
---|
3632 | /* This is a branch. Divide the offset by four.
|
---|
3633 | Note that we need to decide whether it's a branch or
|
---|
3634 | otherwise by inspecting the reloc. Inspecting insn won't
|
---|
3635 | work as insn might be from a .word directive. */
|
---|
3636 | val >>= 2;
|
---|
3637 | break;
|
---|
3638 |
|
---|
3639 | default:
|
---|
3640 | break;
|
---|
3641 | }
|
---|
3642 |
|
---|
3643 | insn = hppa_rebuild_insn (insn, val, r_format);
|
---|
3644 |
|
---|
3645 | /* Update the instruction word. */
|
---|
3646 | bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data);
|
---|
3647 | return bfd_reloc_ok;
|
---|
3648 | }
|
---|
3649 |
|
---|
3650 | /* Relocate an HPPA ELF section. */
|
---|
3651 |
|
---|
3652 | static bfd_boolean
|
---|
3653 | elf32_hppa_relocate_section (bfd *output_bfd,
|
---|
3654 | struct bfd_link_info *info,
|
---|
3655 | bfd *input_bfd,
|
---|
3656 | asection *input_section,
|
---|
3657 | bfd_byte *contents,
|
---|
3658 | Elf_Internal_Rela *relocs,
|
---|
3659 | Elf_Internal_Sym *local_syms,
|
---|
3660 | asection **local_sections)
|
---|
3661 | {
|
---|
3662 | bfd_vma *local_got_offsets;
|
---|
3663 | struct elf32_hppa_link_hash_table *htab;
|
---|
3664 | Elf_Internal_Shdr *symtab_hdr;
|
---|
3665 | Elf_Internal_Rela *rela;
|
---|
3666 | Elf_Internal_Rela *relend;
|
---|
3667 |
|
---|
3668 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
---|
3669 |
|
---|
3670 | htab = hppa_link_hash_table (info);
|
---|
3671 | if (htab == NULL)
|
---|
3672 | return FALSE;
|
---|
3673 |
|
---|
3674 | local_got_offsets = elf_local_got_offsets (input_bfd);
|
---|
3675 |
|
---|
3676 | rela = relocs;
|
---|
3677 | relend = relocs + input_section->reloc_count;
|
---|
3678 | for (; rela < relend; rela++)
|
---|
3679 | {
|
---|
3680 | unsigned int r_type;
|
---|
3681 | reloc_howto_type *howto;
|
---|
3682 | unsigned int r_symndx;
|
---|
3683 | struct elf32_hppa_link_hash_entry *hh;
|
---|
3684 | Elf_Internal_Sym *sym;
|
---|
3685 | asection *sym_sec;
|
---|
3686 | bfd_vma relocation;
|
---|
3687 | bfd_reloc_status_type rstatus;
|
---|
3688 | const char *sym_name;
|
---|
3689 | bfd_boolean plabel;
|
---|
3690 | bfd_boolean warned_undef;
|
---|
3691 |
|
---|
3692 | r_type = ELF32_R_TYPE (rela->r_info);
|
---|
3693 | if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
|
---|
3694 | {
|
---|
3695 | bfd_set_error (bfd_error_bad_value);
|
---|
3696 | return FALSE;
|
---|
3697 | }
|
---|
3698 | if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY
|
---|
3699 | || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT)
|
---|
3700 | continue;
|
---|
3701 |
|
---|
3702 | r_symndx = ELF32_R_SYM (rela->r_info);
|
---|
3703 | hh = NULL;
|
---|
3704 | sym = NULL;
|
---|
3705 | sym_sec = NULL;
|
---|
3706 | warned_undef = FALSE;
|
---|
3707 | if (r_symndx < symtab_hdr->sh_info)
|
---|
3708 | {
|
---|
3709 | /* This is a local symbol, h defaults to NULL. */
|
---|
3710 | sym = local_syms + r_symndx;
|
---|
3711 | sym_sec = local_sections[r_symndx];
|
---|
3712 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sym_sec, rela);
|
---|
3713 | }
|
---|
3714 | else
|
---|
3715 | {
|
---|
3716 | struct elf_link_hash_entry *eh;
|
---|
3717 | bfd_boolean unresolved_reloc, ignored;
|
---|
3718 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
|
---|
3719 |
|
---|
3720 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rela,
|
---|
3721 | r_symndx, symtab_hdr, sym_hashes,
|
---|
3722 | eh, sym_sec, relocation,
|
---|
3723 | unresolved_reloc, warned_undef,
|
---|
3724 | ignored);
|
---|
3725 |
|
---|
3726 | if (!bfd_link_relocatable (info)
|
---|
3727 | && relocation == 0
|
---|
3728 | && eh->root.type != bfd_link_hash_defined
|
---|
3729 | && eh->root.type != bfd_link_hash_defweak
|
---|
3730 | && eh->root.type != bfd_link_hash_undefweak)
|
---|
3731 | {
|
---|
3732 | if (info->unresolved_syms_in_objects == RM_IGNORE
|
---|
3733 | && ELF_ST_VISIBILITY (eh->other) == STV_DEFAULT
|
---|
3734 | && eh->type == STT_PARISC_MILLI)
|
---|
3735 | {
|
---|
3736 | (*info->callbacks->undefined_symbol)
|
---|
3737 | (info, eh_name (eh), input_bfd,
|
---|
3738 | input_section, rela->r_offset, FALSE);
|
---|
3739 | warned_undef = TRUE;
|
---|
3740 | }
|
---|
3741 | }
|
---|
3742 | hh = hppa_elf_hash_entry (eh);
|
---|
3743 | }
|
---|
3744 |
|
---|
3745 | if (sym_sec != NULL && discarded_section (sym_sec))
|
---|
3746 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
---|
3747 | rela, 1, relend,
|
---|
3748 | elf_hppa_howto_table + r_type, 0,
|
---|
3749 | contents);
|
---|
3750 |
|
---|
3751 | if (bfd_link_relocatable (info))
|
---|
3752 | continue;
|
---|
3753 |
|
---|
3754 | /* Do any required modifications to the relocation value, and
|
---|
3755 | determine what types of dynamic info we need to output, if
|
---|
3756 | any. */
|
---|
3757 | plabel = 0;
|
---|
3758 | switch (r_type)
|
---|
3759 | {
|
---|
3760 | case R_PARISC_DLTIND14F:
|
---|
3761 | case R_PARISC_DLTIND14R:
|
---|
3762 | case R_PARISC_DLTIND21L:
|
---|
3763 | {
|
---|
3764 | bfd_vma off;
|
---|
3765 | bfd_boolean do_got = 0;
|
---|
3766 |
|
---|
3767 | /* Relocation is to the entry for this symbol in the
|
---|
3768 | global offset table. */
|
---|
3769 | if (hh != NULL)
|
---|
3770 | {
|
---|
3771 | bfd_boolean dyn;
|
---|
3772 |
|
---|
3773 | off = hh->eh.got.offset;
|
---|
3774 | dyn = htab->etab.dynamic_sections_created;
|
---|
3775 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
|
---|
3776 | bfd_link_pic (info),
|
---|
3777 | &hh->eh))
|
---|
3778 | {
|
---|
3779 | /* If we aren't going to call finish_dynamic_symbol,
|
---|
3780 | then we need to handle initialisation of the .got
|
---|
3781 | entry and create needed relocs here. Since the
|
---|
3782 | offset must always be a multiple of 4, we use the
|
---|
3783 | least significant bit to record whether we have
|
---|
3784 | initialised it already. */
|
---|
3785 | if ((off & 1) != 0)
|
---|
3786 | off &= ~1;
|
---|
3787 | else
|
---|
3788 | {
|
---|
3789 | hh->eh.got.offset |= 1;
|
---|
3790 | do_got = 1;
|
---|
3791 | }
|
---|
3792 | }
|
---|
3793 | }
|
---|
3794 | else
|
---|
3795 | {
|
---|
3796 | /* Local symbol case. */
|
---|
3797 | if (local_got_offsets == NULL)
|
---|
3798 | abort ();
|
---|
3799 |
|
---|
3800 | off = local_got_offsets[r_symndx];
|
---|
3801 |
|
---|
3802 | /* The offset must always be a multiple of 4. We use
|
---|
3803 | the least significant bit to record whether we have
|
---|
3804 | already generated the necessary reloc. */
|
---|
3805 | if ((off & 1) != 0)
|
---|
3806 | off &= ~1;
|
---|
3807 | else
|
---|
3808 | {
|
---|
3809 | local_got_offsets[r_symndx] |= 1;
|
---|
3810 | do_got = 1;
|
---|
3811 | }
|
---|
3812 | }
|
---|
3813 |
|
---|
3814 | if (do_got)
|
---|
3815 | {
|
---|
3816 | if (bfd_link_pic (info))
|
---|
3817 | {
|
---|
3818 | /* Output a dynamic relocation for this GOT entry.
|
---|
3819 | In this case it is relative to the base of the
|
---|
3820 | object because the symbol index is zero. */
|
---|
3821 | Elf_Internal_Rela outrel;
|
---|
3822 | bfd_byte *loc;
|
---|
3823 | asection *sec = htab->srelgot;
|
---|
3824 |
|
---|
3825 | outrel.r_offset = (off
|
---|
3826 | + htab->sgot->output_offset
|
---|
3827 | + htab->sgot->output_section->vma);
|
---|
3828 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
|
---|
3829 | outrel.r_addend = relocation;
|
---|
3830 | loc = sec->contents;
|
---|
3831 | loc += sec->reloc_count++ * sizeof (Elf32_External_Rela);
|
---|
3832 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
---|
3833 | }
|
---|
3834 | else
|
---|
3835 | bfd_put_32 (output_bfd, relocation,
|
---|
3836 | htab->sgot->contents + off);
|
---|
3837 | }
|
---|
3838 |
|
---|
3839 | if (off >= (bfd_vma) -2)
|
---|
3840 | abort ();
|
---|
3841 |
|
---|
3842 | /* Add the base of the GOT to the relocation value. */
|
---|
3843 | relocation = (off
|
---|
3844 | + htab->sgot->output_offset
|
---|
3845 | + htab->sgot->output_section->vma);
|
---|
3846 | }
|
---|
3847 | break;
|
---|
3848 |
|
---|
3849 | case R_PARISC_SEGREL32:
|
---|
3850 | /* If this is the first SEGREL relocation, then initialize
|
---|
3851 | the segment base values. */
|
---|
3852 | if (htab->text_segment_base == (bfd_vma) -1)
|
---|
3853 | bfd_map_over_sections (output_bfd, hppa_record_segment_addr, htab);
|
---|
3854 | break;
|
---|
3855 |
|
---|
3856 | case R_PARISC_PLABEL14R:
|
---|
3857 | case R_PARISC_PLABEL21L:
|
---|
3858 | case R_PARISC_PLABEL32:
|
---|
3859 | if (htab->etab.dynamic_sections_created)
|
---|
3860 | {
|
---|
3861 | bfd_vma off;
|
---|
3862 | bfd_boolean do_plt = 0;
|
---|
3863 | /* If we have a global symbol with a PLT slot, then
|
---|
3864 | redirect this relocation to it. */
|
---|
3865 | if (hh != NULL)
|
---|
3866 | {
|
---|
3867 | off = hh->eh.plt.offset;
|
---|
3868 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1,
|
---|
3869 | bfd_link_pic (info),
|
---|
3870 | &hh->eh))
|
---|
3871 | {
|
---|
3872 | /* In a non-shared link, adjust_dynamic_symbols
|
---|
3873 | isn't called for symbols forced local. We
|
---|
3874 | need to write out the plt entry here. */
|
---|
3875 | if ((off & 1) != 0)
|
---|
3876 | off &= ~1;
|
---|
3877 | else
|
---|
3878 | {
|
---|
3879 | hh->eh.plt.offset |= 1;
|
---|
3880 | do_plt = 1;
|
---|
3881 | }
|
---|
3882 | }
|
---|
3883 | }
|
---|
3884 | else
|
---|
3885 | {
|
---|
3886 | bfd_vma *local_plt_offsets;
|
---|
3887 |
|
---|
3888 | if (local_got_offsets == NULL)
|
---|
3889 | abort ();
|
---|
3890 |
|
---|
3891 | local_plt_offsets = local_got_offsets + symtab_hdr->sh_info;
|
---|
3892 | off = local_plt_offsets[r_symndx];
|
---|
3893 |
|
---|
3894 | /* As for the local .got entry case, we use the last
|
---|
3895 | bit to record whether we've already initialised
|
---|
3896 | this local .plt entry. */
|
---|
3897 | if ((off & 1) != 0)
|
---|
3898 | off &= ~1;
|
---|
3899 | else
|
---|
3900 | {
|
---|
3901 | local_plt_offsets[r_symndx] |= 1;
|
---|
3902 | do_plt = 1;
|
---|
3903 | }
|
---|
3904 | }
|
---|
3905 |
|
---|
3906 | if (do_plt)
|
---|
3907 | {
|
---|
3908 | if (bfd_link_pic (info))
|
---|
3909 | {
|
---|
3910 | /* Output a dynamic IPLT relocation for this
|
---|
3911 | PLT entry. */
|
---|
3912 | Elf_Internal_Rela outrel;
|
---|
3913 | bfd_byte *loc;
|
---|
3914 | asection *s = htab->srelplt;
|
---|
3915 |
|
---|
3916 | outrel.r_offset = (off
|
---|
3917 | + htab->splt->output_offset
|
---|
3918 | + htab->splt->output_section->vma);
|
---|
3919 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
|
---|
3920 | outrel.r_addend = relocation;
|
---|
3921 | loc = s->contents;
|
---|
3922 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
|
---|
3923 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
---|
3924 | }
|
---|
3925 | else
|
---|
3926 | {
|
---|
3927 | bfd_put_32 (output_bfd,
|
---|
3928 | relocation,
|
---|
3929 | htab->splt->contents + off);
|
---|
3930 | bfd_put_32 (output_bfd,
|
---|
3931 | elf_gp (htab->splt->output_section->owner),
|
---|
3932 | htab->splt->contents + off + 4);
|
---|
3933 | }
|
---|
3934 | }
|
---|
3935 |
|
---|
3936 | if (off >= (bfd_vma) -2)
|
---|
3937 | abort ();
|
---|
3938 |
|
---|
3939 | /* PLABELs contain function pointers. Relocation is to
|
---|
3940 | the entry for the function in the .plt. The magic +2
|
---|
3941 | offset signals to $$dyncall that the function pointer
|
---|
3942 | is in the .plt and thus has a gp pointer too.
|
---|
3943 | Exception: Undefined PLABELs should have a value of
|
---|
3944 | zero. */
|
---|
3945 | if (hh == NULL
|
---|
3946 | || (hh->eh.root.type != bfd_link_hash_undefweak
|
---|
3947 | && hh->eh.root.type != bfd_link_hash_undefined))
|
---|
3948 | {
|
---|
3949 | relocation = (off
|
---|
3950 | + htab->splt->output_offset
|
---|
3951 | + htab->splt->output_section->vma
|
---|
3952 | + 2);
|
---|
3953 | }
|
---|
3954 | plabel = 1;
|
---|
3955 | }
|
---|
3956 | /* Fall through and possibly emit a dynamic relocation. */
|
---|
3957 |
|
---|
3958 | case R_PARISC_DIR17F:
|
---|
3959 | case R_PARISC_DIR17R:
|
---|
3960 | case R_PARISC_DIR14F:
|
---|
3961 | case R_PARISC_DIR14R:
|
---|
3962 | case R_PARISC_DIR21L:
|
---|
3963 | case R_PARISC_DPREL14F:
|
---|
3964 | case R_PARISC_DPREL14R:
|
---|
3965 | case R_PARISC_DPREL21L:
|
---|
3966 | case R_PARISC_DIR32:
|
---|
3967 | if ((input_section->flags & SEC_ALLOC) == 0)
|
---|
3968 | break;
|
---|
3969 |
|
---|
3970 | /* The reloc types handled here and this conditional
|
---|
3971 | expression must match the code in ..check_relocs and
|
---|
3972 | allocate_dynrelocs. ie. We need exactly the same condition
|
---|
3973 | as in ..check_relocs, with some extra conditions (dynindx
|
---|
3974 | test in this case) to cater for relocs removed by
|
---|
3975 | allocate_dynrelocs. If you squint, the non-shared test
|
---|
3976 | here does indeed match the one in ..check_relocs, the
|
---|
3977 | difference being that here we test DEF_DYNAMIC as well as
|
---|
3978 | !DEF_REGULAR. All common syms end up with !DEF_REGULAR,
|
---|
3979 | which is why we can't use just that test here.
|
---|
3980 | Conversely, DEF_DYNAMIC can't be used in check_relocs as
|
---|
3981 | there all files have not been loaded. */
|
---|
3982 | if ((bfd_link_pic (info)
|
---|
3983 | && (hh == NULL
|
---|
3984 | || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
|
---|
3985 | || hh->eh.root.type != bfd_link_hash_undefweak)
|
---|
3986 | && (IS_ABSOLUTE_RELOC (r_type)
|
---|
3987 | || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
|
---|
3988 | || (!bfd_link_pic (info)
|
---|
3989 | && hh != NULL
|
---|
3990 | && hh->eh.dynindx != -1
|
---|
3991 | && !hh->eh.non_got_ref
|
---|
3992 | && ((ELIMINATE_COPY_RELOCS
|
---|
3993 | && hh->eh.def_dynamic
|
---|
3994 | && !hh->eh.def_regular)
|
---|
3995 | || hh->eh.root.type == bfd_link_hash_undefweak
|
---|
3996 | || hh->eh.root.type == bfd_link_hash_undefined)))
|
---|
3997 | {
|
---|
3998 | Elf_Internal_Rela outrel;
|
---|
3999 | bfd_boolean skip;
|
---|
4000 | asection *sreloc;
|
---|
4001 | bfd_byte *loc;
|
---|
4002 |
|
---|
4003 | /* When generating a shared object, these relocations
|
---|
4004 | are copied into the output file to be resolved at run
|
---|
4005 | time. */
|
---|
4006 |
|
---|
4007 | outrel.r_addend = rela->r_addend;
|
---|
4008 | outrel.r_offset =
|
---|
4009 | _bfd_elf_section_offset (output_bfd, info, input_section,
|
---|
4010 | rela->r_offset);
|
---|
4011 | skip = (outrel.r_offset == (bfd_vma) -1
|
---|
4012 | || outrel.r_offset == (bfd_vma) -2);
|
---|
4013 | outrel.r_offset += (input_section->output_offset
|
---|
4014 | + input_section->output_section->vma);
|
---|
4015 |
|
---|
4016 | if (skip)
|
---|
4017 | {
|
---|
4018 | memset (&outrel, 0, sizeof (outrel));
|
---|
4019 | }
|
---|
4020 | else if (hh != NULL
|
---|
4021 | && hh->eh.dynindx != -1
|
---|
4022 | && (plabel
|
---|
4023 | || !IS_ABSOLUTE_RELOC (r_type)
|
---|
4024 | || !bfd_link_pic (info)
|
---|
4025 | || !SYMBOLIC_BIND (info, &hh->eh)
|
---|
4026 | || !hh->eh.def_regular))
|
---|
4027 | {
|
---|
4028 | outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
|
---|
4029 | }
|
---|
4030 | else /* It's a local symbol, or one marked to become local. */
|
---|
4031 | {
|
---|
4032 | int indx = 0;
|
---|
4033 |
|
---|
4034 | /* Add the absolute offset of the symbol. */
|
---|
4035 | outrel.r_addend += relocation;
|
---|
4036 |
|
---|
4037 | /* Global plabels need to be processed by the
|
---|
4038 | dynamic linker so that functions have at most one
|
---|
4039 | fptr. For this reason, we need to differentiate
|
---|
4040 | between global and local plabels, which we do by
|
---|
4041 | providing the function symbol for a global plabel
|
---|
4042 | reloc, and no symbol for local plabels. */
|
---|
4043 | if (! plabel
|
---|
4044 | && sym_sec != NULL
|
---|
4045 | && sym_sec->output_section != NULL
|
---|
4046 | && ! bfd_is_abs_section (sym_sec))
|
---|
4047 | {
|
---|
4048 | asection *osec;
|
---|
4049 |
|
---|
4050 | osec = sym_sec->output_section;
|
---|
4051 | indx = elf_section_data (osec)->dynindx;
|
---|
4052 | if (indx == 0)
|
---|
4053 | {
|
---|
4054 | osec = htab->etab.text_index_section;
|
---|
4055 | indx = elf_section_data (osec)->dynindx;
|
---|
4056 | }
|
---|
4057 | BFD_ASSERT (indx != 0);
|
---|
4058 |
|
---|
4059 | /* We are turning this relocation into one
|
---|
4060 | against a section symbol, so subtract out the
|
---|
4061 | output section's address but not the offset
|
---|
4062 | of the input section in the output section. */
|
---|
4063 | outrel.r_addend -= osec->vma;
|
---|
4064 | }
|
---|
4065 |
|
---|
4066 | outrel.r_info = ELF32_R_INFO (indx, r_type);
|
---|
4067 | }
|
---|
4068 | sreloc = elf_section_data (input_section)->sreloc;
|
---|
4069 | if (sreloc == NULL)
|
---|
4070 | abort ();
|
---|
4071 |
|
---|
4072 | loc = sreloc->contents;
|
---|
4073 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
---|
4074 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
---|
4075 | }
|
---|
4076 | break;
|
---|
4077 |
|
---|
4078 | case R_PARISC_TLS_LDM21L:
|
---|
4079 | case R_PARISC_TLS_LDM14R:
|
---|
4080 | {
|
---|
4081 | bfd_vma off;
|
---|
4082 |
|
---|
4083 | off = htab->tls_ldm_got.offset;
|
---|
4084 | if (off & 1)
|
---|
4085 | off &= ~1;
|
---|
4086 | else
|
---|
4087 | {
|
---|
4088 | Elf_Internal_Rela outrel;
|
---|
4089 | bfd_byte *loc;
|
---|
4090 |
|
---|
4091 | outrel.r_offset = (off
|
---|
4092 | + htab->sgot->output_section->vma
|
---|
4093 | + htab->sgot->output_offset);
|
---|
4094 | outrel.r_addend = 0;
|
---|
4095 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_TLS_DTPMOD32);
|
---|
4096 | loc = htab->srelgot->contents;
|
---|
4097 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
---|
4098 |
|
---|
4099 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
---|
4100 | htab->tls_ldm_got.offset |= 1;
|
---|
4101 | }
|
---|
4102 |
|
---|
4103 | /* Add the base of the GOT to the relocation value. */
|
---|
4104 | relocation = (off
|
---|
4105 | + htab->sgot->output_offset
|
---|
4106 | + htab->sgot->output_section->vma);
|
---|
4107 |
|
---|
4108 | break;
|
---|
4109 | }
|
---|
4110 |
|
---|
4111 | case R_PARISC_TLS_LDO21L:
|
---|
4112 | case R_PARISC_TLS_LDO14R:
|
---|
4113 | relocation -= dtpoff_base (info);
|
---|
4114 | break;
|
---|
4115 |
|
---|
4116 | case R_PARISC_TLS_GD21L:
|
---|
4117 | case R_PARISC_TLS_GD14R:
|
---|
4118 | case R_PARISC_TLS_IE21L:
|
---|
4119 | case R_PARISC_TLS_IE14R:
|
---|
4120 | {
|
---|
4121 | bfd_vma off;
|
---|
4122 | int indx;
|
---|
4123 | char tls_type;
|
---|
4124 |
|
---|
4125 | indx = 0;
|
---|
4126 | if (hh != NULL)
|
---|
4127 | {
|
---|
4128 | bfd_boolean dyn;
|
---|
4129 | dyn = htab->etab.dynamic_sections_created;
|
---|
4130 |
|
---|
4131 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
|
---|
4132 | bfd_link_pic (info),
|
---|
4133 | &hh->eh)
|
---|
4134 | && (!bfd_link_pic (info)
|
---|
4135 | || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
|
---|
4136 | {
|
---|
4137 | indx = hh->eh.dynindx;
|
---|
4138 | }
|
---|
4139 | off = hh->eh.got.offset;
|
---|
4140 | tls_type = hh->tls_type;
|
---|
4141 | }
|
---|
4142 | else
|
---|
4143 | {
|
---|
4144 | off = local_got_offsets[r_symndx];
|
---|
4145 | tls_type = hppa_elf_local_got_tls_type (input_bfd)[r_symndx];
|
---|
4146 | }
|
---|
4147 |
|
---|
4148 | if (tls_type == GOT_UNKNOWN)
|
---|
4149 | abort ();
|
---|
4150 |
|
---|
4151 | if ((off & 1) != 0)
|
---|
4152 | off &= ~1;
|
---|
4153 | else
|
---|
4154 | {
|
---|
4155 | bfd_boolean need_relocs = FALSE;
|
---|
4156 | Elf_Internal_Rela outrel;
|
---|
4157 | bfd_byte *loc = NULL;
|
---|
4158 | int cur_off = off;
|
---|
4159 |
|
---|
4160 | /* The GOT entries have not been initialized yet. Do it
|
---|
4161 | now, and emit any relocations. If both an IE GOT and a
|
---|
4162 | GD GOT are necessary, we emit the GD first. */
|
---|
4163 |
|
---|
4164 | if ((bfd_link_pic (info) || indx != 0)
|
---|
4165 | && (hh == NULL
|
---|
4166 | || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
|
---|
4167 | || hh->eh.root.type != bfd_link_hash_undefweak))
|
---|
4168 | {
|
---|
4169 | need_relocs = TRUE;
|
---|
4170 | loc = htab->srelgot->contents;
|
---|
4171 | /* FIXME (CAO): Should this be reloc_count++ ? */
|
---|
4172 | loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela);
|
---|
4173 | }
|
---|
4174 |
|
---|
4175 | if (tls_type & GOT_TLS_GD)
|
---|
4176 | {
|
---|
4177 | if (need_relocs)
|
---|
4178 | {
|
---|
4179 | outrel.r_offset = (cur_off
|
---|
4180 | + htab->sgot->output_section->vma
|
---|
4181 | + htab->sgot->output_offset);
|
---|
4182 | outrel.r_info = ELF32_R_INFO (indx,R_PARISC_TLS_DTPMOD32);
|
---|
4183 | outrel.r_addend = 0;
|
---|
4184 | bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off);
|
---|
4185 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
---|
4186 | htab->srelgot->reloc_count++;
|
---|
4187 | loc += sizeof (Elf32_External_Rela);
|
---|
4188 |
|
---|
4189 | if (indx == 0)
|
---|
4190 | bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
|
---|
4191 | htab->sgot->contents + cur_off + 4);
|
---|
4192 | else
|
---|
4193 | {
|
---|
4194 | bfd_put_32 (output_bfd, 0,
|
---|
4195 | htab->sgot->contents + cur_off + 4);
|
---|
4196 | outrel.r_info = ELF32_R_INFO (indx, R_PARISC_TLS_DTPOFF32);
|
---|
4197 | outrel.r_offset += 4;
|
---|
4198 | bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
|
---|
4199 | htab->srelgot->reloc_count++;
|
---|
4200 | loc += sizeof (Elf32_External_Rela);
|
---|
4201 | }
|
---|
4202 | }
|
---|
4203 | else
|
---|
4204 | {
|
---|
4205 | /* If we are not emitting relocations for a
|
---|
4206 | general dynamic reference, then we must be in a
|
---|
4207 | static link or an executable link with the
|
---|
4208 | symbol binding locally. Mark it as belonging
|
---|
4209 | to module 1, the executable. */
|
---|
4210 | bfd_put_32 (output_bfd, 1,
|
---|
4211 | htab->sgot->contents + cur_off);
|
---|
4212 | bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
|
---|
4213 | htab->sgot->contents + cur_off + 4);
|
---|
4214 | }
|
---|
4215 |
|
---|
4216 |
|
---|
4217 | cur_off += 8;
|
---|
4218 | }
|
---|
4219 |
|
---|
4220 | if (tls_type & GOT_TLS_IE)
|
---|
4221 | {
|
---|
4222 | if (need_relocs)
|
---|
4223 | {
|
---|
4224 | outrel.r_offset = (cur_off
|
---|
4225 | + htab->sgot->output_section->vma
|
---|
4226 | + htab->sgot->output_offset);
|
---|
4227 | outrel.r_info = ELF32_R_INFO (indx, R_PARISC_TLS_TPREL32);
|
---|
4228 |
|
---|
4229 | if (indx == 0)
|
---|
4230 | outrel.r_addend = relocation - dtpoff_base (info);
|
---|
4231 | else
|
---|
4232 | outrel.r_addend = 0;
|
---|
4233 |
|
---|
4234 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
---|
4235 | htab->srelgot->reloc_count++;
|
---|
4236 | loc += sizeof (Elf32_External_Rela);
|
---|
4237 | }
|
---|
4238 | else
|
---|
4239 | bfd_put_32 (output_bfd, tpoff (info, relocation),
|
---|
4240 | htab->sgot->contents + cur_off);
|
---|
4241 |
|
---|
4242 | cur_off += 4;
|
---|
4243 | }
|
---|
4244 |
|
---|
4245 | if (hh != NULL)
|
---|
4246 | hh->eh.got.offset |= 1;
|
---|
4247 | else
|
---|
4248 | local_got_offsets[r_symndx] |= 1;
|
---|
4249 | }
|
---|
4250 |
|
---|
4251 | if ((tls_type & GOT_TLS_GD)
|
---|
4252 | && r_type != R_PARISC_TLS_GD21L
|
---|
4253 | && r_type != R_PARISC_TLS_GD14R)
|
---|
4254 | off += 2 * GOT_ENTRY_SIZE;
|
---|
4255 |
|
---|
4256 | /* Add the base of the GOT to the relocation value. */
|
---|
4257 | relocation = (off
|
---|
4258 | + htab->sgot->output_offset
|
---|
4259 | + htab->sgot->output_section->vma);
|
---|
4260 |
|
---|
4261 | break;
|
---|
4262 | }
|
---|
4263 |
|
---|
4264 | case R_PARISC_TLS_LE21L:
|
---|
4265 | case R_PARISC_TLS_LE14R:
|
---|
4266 | {
|
---|
4267 | relocation = tpoff (info, relocation);
|
---|
4268 | break;
|
---|
4269 | }
|
---|
4270 | break;
|
---|
4271 |
|
---|
4272 | default:
|
---|
4273 | break;
|
---|
4274 | }
|
---|
4275 |
|
---|
4276 | rstatus = final_link_relocate (input_section, contents, rela, relocation,
|
---|
4277 | htab, sym_sec, hh, info);
|
---|
4278 |
|
---|
4279 | if (rstatus == bfd_reloc_ok)
|
---|
4280 | continue;
|
---|
4281 |
|
---|
4282 | if (hh != NULL)
|
---|
4283 | sym_name = hh_name (hh);
|
---|
4284 | else
|
---|
4285 | {
|
---|
4286 | sym_name = bfd_elf_string_from_elf_section (input_bfd,
|
---|
4287 | symtab_hdr->sh_link,
|
---|
4288 | sym->st_name);
|
---|
4289 | if (sym_name == NULL)
|
---|
4290 | return FALSE;
|
---|
4291 | if (*sym_name == '\0')
|
---|
4292 | sym_name = bfd_section_name (input_bfd, sym_sec);
|
---|
4293 | }
|
---|
4294 |
|
---|
4295 | howto = elf_hppa_howto_table + r_type;
|
---|
4296 |
|
---|
4297 | if (rstatus == bfd_reloc_undefined || rstatus == bfd_reloc_notsupported)
|
---|
4298 | {
|
---|
4299 | if (rstatus == bfd_reloc_notsupported || !warned_undef)
|
---|
4300 | {
|
---|
4301 | (*_bfd_error_handler)
|
---|
4302 | (_("%B(%A+0x%lx): cannot handle %s for %s"),
|
---|
4303 | input_bfd,
|
---|
4304 | input_section,
|
---|
4305 | (long) rela->r_offset,
|
---|
4306 | howto->name,
|
---|
4307 | sym_name);
|
---|
4308 | bfd_set_error (bfd_error_bad_value);
|
---|
4309 | return FALSE;
|
---|
4310 | }
|
---|
4311 | }
|
---|
4312 | else
|
---|
4313 | (*info->callbacks->reloc_overflow)
|
---|
4314 | (info, (hh ? &hh->eh.root : NULL), sym_name, howto->name,
|
---|
4315 | (bfd_vma) 0, input_bfd, input_section, rela->r_offset);
|
---|
4316 | }
|
---|
4317 |
|
---|
4318 | return TRUE;
|
---|
4319 | }
|
---|
4320 |
|
---|
4321 | /* Finish up dynamic symbol handling. We set the contents of various
|
---|
4322 | dynamic sections here. */
|
---|
4323 |
|
---|
4324 | static bfd_boolean
|
---|
4325 | elf32_hppa_finish_dynamic_symbol (bfd *output_bfd,
|
---|
4326 | struct bfd_link_info *info,
|
---|
4327 | struct elf_link_hash_entry *eh,
|
---|
4328 | Elf_Internal_Sym *sym)
|
---|
4329 | {
|
---|
4330 | struct elf32_hppa_link_hash_table *htab;
|
---|
4331 | Elf_Internal_Rela rela;
|
---|
4332 | bfd_byte *loc;
|
---|
4333 |
|
---|
4334 | htab = hppa_link_hash_table (info);
|
---|
4335 | if (htab == NULL)
|
---|
4336 | return FALSE;
|
---|
4337 |
|
---|
4338 | if (eh->plt.offset != (bfd_vma) -1)
|
---|
4339 | {
|
---|
4340 | bfd_vma value;
|
---|
4341 |
|
---|
4342 | if (eh->plt.offset & 1)
|
---|
4343 | abort ();
|
---|
4344 |
|
---|
4345 | /* This symbol has an entry in the procedure linkage table. Set
|
---|
4346 | it up.
|
---|
4347 |
|
---|
4348 | The format of a plt entry is
|
---|
4349 | <funcaddr>
|
---|
4350 | <__gp>
|
---|
4351 | */
|
---|
4352 | value = 0;
|
---|
4353 | if (eh->root.type == bfd_link_hash_defined
|
---|
4354 | || eh->root.type == bfd_link_hash_defweak)
|
---|
4355 | {
|
---|
4356 | value = eh->root.u.def.value;
|
---|
4357 | if (eh->root.u.def.section->output_section != NULL)
|
---|
4358 | value += (eh->root.u.def.section->output_offset
|
---|
4359 | + eh->root.u.def.section->output_section->vma);
|
---|
4360 | }
|
---|
4361 |
|
---|
4362 | /* Create a dynamic IPLT relocation for this entry. */
|
---|
4363 | rela.r_offset = (eh->plt.offset
|
---|
4364 | + htab->splt->output_offset
|
---|
4365 | + htab->splt->output_section->vma);
|
---|
4366 | if (eh->dynindx != -1)
|
---|
4367 | {
|
---|
4368 | rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_IPLT);
|
---|
4369 | rela.r_addend = 0;
|
---|
4370 | }
|
---|
4371 | else
|
---|
4372 | {
|
---|
4373 | /* This symbol has been marked to become local, and is
|
---|
4374 | used by a plabel so must be kept in the .plt. */
|
---|
4375 | rela.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
|
---|
4376 | rela.r_addend = value;
|
---|
4377 | }
|
---|
4378 |
|
---|
4379 | loc = htab->srelplt->contents;
|
---|
4380 | loc += htab->srelplt->reloc_count++ * sizeof (Elf32_External_Rela);
|
---|
4381 | bfd_elf32_swap_reloca_out (htab->splt->output_section->owner, &rela, loc);
|
---|
4382 |
|
---|
4383 | if (!eh->def_regular)
|
---|
4384 | {
|
---|
4385 | /* Mark the symbol as undefined, rather than as defined in
|
---|
4386 | the .plt section. Leave the value alone. */
|
---|
4387 | sym->st_shndx = SHN_UNDEF;
|
---|
4388 | }
|
---|
4389 | }
|
---|
4390 |
|
---|
4391 | if (eh->got.offset != (bfd_vma) -1
|
---|
4392 | && (hppa_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
|
---|
4393 | && (hppa_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
|
---|
4394 | {
|
---|
4395 | /* This symbol has an entry in the global offset table. Set it
|
---|
4396 | up. */
|
---|
4397 |
|
---|
4398 | rela.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
|
---|
4399 | + htab->sgot->output_offset
|
---|
4400 | + htab->sgot->output_section->vma);
|
---|
4401 |
|
---|
4402 | /* If this is a -Bsymbolic link and the symbol is defined
|
---|
4403 | locally or was forced to be local because of a version file,
|
---|
4404 | we just want to emit a RELATIVE reloc. The entry in the
|
---|
4405 | global offset table will already have been initialized in the
|
---|
4406 | relocate_section function. */
|
---|
4407 | if (bfd_link_pic (info)
|
---|
4408 | && (SYMBOLIC_BIND (info, eh) || eh->dynindx == -1)
|
---|
4409 | && eh->def_regular)
|
---|
4410 | {
|
---|
4411 | rela.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
|
---|
4412 | rela.r_addend = (eh->root.u.def.value
|
---|
4413 | + eh->root.u.def.section->output_offset
|
---|
4414 | + eh->root.u.def.section->output_section->vma);
|
---|
4415 | }
|
---|
4416 | else
|
---|
4417 | {
|
---|
4418 | if ((eh->got.offset & 1) != 0)
|
---|
4419 | abort ();
|
---|
4420 |
|
---|
4421 | bfd_put_32 (output_bfd, 0, htab->sgot->contents + (eh->got.offset & ~1));
|
---|
4422 | rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_DIR32);
|
---|
4423 | rela.r_addend = 0;
|
---|
4424 | }
|
---|
4425 |
|
---|
4426 | loc = htab->srelgot->contents;
|
---|
4427 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
---|
4428 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
---|
4429 | }
|
---|
4430 |
|
---|
4431 | if (eh->needs_copy)
|
---|
4432 | {
|
---|
4433 | asection *sec;
|
---|
4434 |
|
---|
4435 | /* This symbol needs a copy reloc. Set it up. */
|
---|
4436 |
|
---|
4437 | if (! (eh->dynindx != -1
|
---|
4438 | && (eh->root.type == bfd_link_hash_defined
|
---|
4439 | || eh->root.type == bfd_link_hash_defweak)))
|
---|
4440 | abort ();
|
---|
4441 |
|
---|
4442 | sec = htab->srelbss;
|
---|
4443 |
|
---|
4444 | rela.r_offset = (eh->root.u.def.value
|
---|
4445 | + eh->root.u.def.section->output_offset
|
---|
4446 | + eh->root.u.def.section->output_section->vma);
|
---|
4447 | rela.r_addend = 0;
|
---|
4448 | rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_COPY);
|
---|
4449 | loc = sec->contents + sec->reloc_count++ * sizeof (Elf32_External_Rela);
|
---|
4450 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
---|
4451 | }
|
---|
4452 |
|
---|
4453 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
---|
4454 | if (eh == htab->etab.hdynamic || eh == htab->etab.hgot)
|
---|
4455 | {
|
---|
4456 | sym->st_shndx = SHN_ABS;
|
---|
4457 | }
|
---|
4458 |
|
---|
4459 | return TRUE;
|
---|
4460 | }
|
---|
4461 |
|
---|
4462 | /* Used to decide how to sort relocs in an optimal manner for the
|
---|
4463 | dynamic linker, before writing them out. */
|
---|
4464 |
|
---|
4465 | static enum elf_reloc_type_class
|
---|
4466 | elf32_hppa_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
---|
4467 | const asection *rel_sec ATTRIBUTE_UNUSED,
|
---|
4468 | const Elf_Internal_Rela *rela)
|
---|
4469 | {
|
---|
4470 | /* Handle TLS relocs first; we don't want them to be marked
|
---|
4471 | relative by the "if (ELF32_R_SYM (rela->r_info) == STN_UNDEF)"
|
---|
4472 | check below. */
|
---|
4473 | switch ((int) ELF32_R_TYPE (rela->r_info))
|
---|
4474 | {
|
---|
4475 | case R_PARISC_TLS_DTPMOD32:
|
---|
4476 | case R_PARISC_TLS_DTPOFF32:
|
---|
4477 | case R_PARISC_TLS_TPREL32:
|
---|
4478 | return reloc_class_normal;
|
---|
4479 | }
|
---|
4480 |
|
---|
4481 | if (ELF32_R_SYM (rela->r_info) == STN_UNDEF)
|
---|
4482 | return reloc_class_relative;
|
---|
4483 |
|
---|
4484 | switch ((int) ELF32_R_TYPE (rela->r_info))
|
---|
4485 | {
|
---|
4486 | case R_PARISC_IPLT:
|
---|
4487 | return reloc_class_plt;
|
---|
4488 | case R_PARISC_COPY:
|
---|
4489 | return reloc_class_copy;
|
---|
4490 | default:
|
---|
4491 | return reloc_class_normal;
|
---|
4492 | }
|
---|
4493 | }
|
---|
4494 |
|
---|
4495 | /* Finish up the dynamic sections. */
|
---|
4496 |
|
---|
4497 | static bfd_boolean
|
---|
4498 | elf32_hppa_finish_dynamic_sections (bfd *output_bfd,
|
---|
4499 | struct bfd_link_info *info)
|
---|
4500 | {
|
---|
4501 | bfd *dynobj;
|
---|
4502 | struct elf32_hppa_link_hash_table *htab;
|
---|
4503 | asection *sdyn;
|
---|
4504 | asection * sgot;
|
---|
4505 |
|
---|
4506 | htab = hppa_link_hash_table (info);
|
---|
4507 | if (htab == NULL)
|
---|
4508 | return FALSE;
|
---|
4509 |
|
---|
4510 | dynobj = htab->etab.dynobj;
|
---|
4511 |
|
---|
4512 | sgot = htab->sgot;
|
---|
4513 | /* A broken linker script might have discarded the dynamic sections.
|
---|
4514 | Catch this here so that we do not seg-fault later on. */
|
---|
4515 | if (sgot != NULL && bfd_is_abs_section (sgot->output_section))
|
---|
4516 | return FALSE;
|
---|
4517 |
|
---|
4518 | sdyn = bfd_get_linker_section (dynobj, ".dynamic");
|
---|
4519 |
|
---|
4520 | if (htab->etab.dynamic_sections_created)
|
---|
4521 | {
|
---|
4522 | Elf32_External_Dyn *dyncon, *dynconend;
|
---|
4523 |
|
---|
4524 | if (sdyn == NULL)
|
---|
4525 | abort ();
|
---|
4526 |
|
---|
4527 | dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
---|
4528 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
---|
4529 | for (; dyncon < dynconend; dyncon++)
|
---|
4530 | {
|
---|
4531 | Elf_Internal_Dyn dyn;
|
---|
4532 | asection *s;
|
---|
4533 |
|
---|
4534 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
---|
4535 |
|
---|
4536 | switch (dyn.d_tag)
|
---|
4537 | {
|
---|
4538 | default:
|
---|
4539 | continue;
|
---|
4540 |
|
---|
4541 | case DT_PLTGOT:
|
---|
4542 | /* Use PLTGOT to set the GOT register. */
|
---|
4543 | dyn.d_un.d_ptr = elf_gp (output_bfd);
|
---|
4544 | break;
|
---|
4545 |
|
---|
4546 | case DT_JMPREL:
|
---|
4547 | s = htab->srelplt;
|
---|
4548 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
|
---|
4549 | break;
|
---|
4550 |
|
---|
4551 | case DT_PLTRELSZ:
|
---|
4552 | s = htab->srelplt;
|
---|
4553 | dyn.d_un.d_val = s->size;
|
---|
4554 | break;
|
---|
4555 |
|
---|
4556 | case DT_RELASZ:
|
---|
4557 | /* Don't count procedure linkage table relocs in the
|
---|
4558 | overall reloc count. */
|
---|
4559 | s = htab->srelplt;
|
---|
4560 | if (s == NULL)
|
---|
4561 | continue;
|
---|
4562 | dyn.d_un.d_val -= s->size;
|
---|
4563 | break;
|
---|
4564 |
|
---|
4565 | case DT_RELA:
|
---|
4566 | /* We may not be using the standard ELF linker script.
|
---|
4567 | If .rela.plt is the first .rela section, we adjust
|
---|
4568 | DT_RELA to not include it. */
|
---|
4569 | s = htab->srelplt;
|
---|
4570 | if (s == NULL)
|
---|
4571 | continue;
|
---|
4572 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
|
---|
4573 | continue;
|
---|
4574 | dyn.d_un.d_ptr += s->size;
|
---|
4575 | break;
|
---|
4576 | }
|
---|
4577 |
|
---|
4578 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
---|
4579 | }
|
---|
4580 | }
|
---|
4581 |
|
---|
4582 | if (sgot != NULL && sgot->size != 0)
|
---|
4583 | {
|
---|
4584 | /* Fill in the first entry in the global offset table.
|
---|
4585 | We use it to point to our dynamic section, if we have one. */
|
---|
4586 | bfd_put_32 (output_bfd,
|
---|
4587 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
|
---|
4588 | sgot->contents);
|
---|
4589 |
|
---|
4590 | /* The second entry is reserved for use by the dynamic linker. */
|
---|
4591 | memset (sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
|
---|
4592 |
|
---|
4593 | /* Set .got entry size. */
|
---|
4594 | elf_section_data (sgot->output_section)
|
---|
4595 | ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
|
---|
4596 | }
|
---|
4597 |
|
---|
4598 | if (htab->splt != NULL && htab->splt->size != 0)
|
---|
4599 | {
|
---|
4600 | /* Set plt entry size to 0 instead of PLT_ENTRY_SIZE, since we add the
|
---|
4601 | plt stubs and as such the section does not hold a table of fixed-size
|
---|
4602 | entries. */
|
---|
4603 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = 0;
|
---|
4604 |
|
---|
4605 | if (htab->need_plt_stub)
|
---|
4606 | {
|
---|
4607 | /* Set up the .plt stub. */
|
---|
4608 | memcpy (htab->splt->contents
|
---|
4609 | + htab->splt->size - sizeof (plt_stub),
|
---|
4610 | plt_stub, sizeof (plt_stub));
|
---|
4611 |
|
---|
4612 | if ((htab->splt->output_offset
|
---|
4613 | + htab->splt->output_section->vma
|
---|
4614 | + htab->splt->size)
|
---|
4615 | != (sgot->output_offset
|
---|
4616 | + sgot->output_section->vma))
|
---|
4617 | {
|
---|
4618 | (*_bfd_error_handler)
|
---|
4619 | (_(".got section not immediately after .plt section"));
|
---|
4620 | return FALSE;
|
---|
4621 | }
|
---|
4622 | }
|
---|
4623 | }
|
---|
4624 |
|
---|
4625 | return TRUE;
|
---|
4626 | }
|
---|
4627 |
|
---|
4628 | /* Called when writing out an object file to decide the type of a
|
---|
4629 | symbol. */
|
---|
4630 | static int
|
---|
4631 | elf32_hppa_elf_get_symbol_type (Elf_Internal_Sym *elf_sym, int type)
|
---|
4632 | {
|
---|
4633 | if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI)
|
---|
4634 | return STT_PARISC_MILLI;
|
---|
4635 | else
|
---|
4636 | return type;
|
---|
4637 | }
|
---|
4638 |
|
---|
4639 | /* Misc BFD support code. */
|
---|
4640 | #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name
|
---|
4641 | #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
|
---|
4642 | #define bfd_elf32_bfd_reloc_name_lookup elf_hppa_reloc_name_lookup
|
---|
4643 | #define elf_info_to_howto elf_hppa_info_to_howto
|
---|
4644 | #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
|
---|
4645 |
|
---|
4646 | /* Stuff for the BFD linker. */
|
---|
4647 | #define bfd_elf32_bfd_final_link elf32_hppa_final_link
|
---|
4648 | #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create
|
---|
4649 | #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol
|
---|
4650 | #define elf_backend_copy_indirect_symbol elf32_hppa_copy_indirect_symbol
|
---|
4651 | #define elf_backend_check_relocs elf32_hppa_check_relocs
|
---|
4652 | #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections
|
---|
4653 | #define elf_backend_fake_sections elf_hppa_fake_sections
|
---|
4654 | #define elf_backend_relocate_section elf32_hppa_relocate_section
|
---|
4655 | #define elf_backend_hide_symbol elf32_hppa_hide_symbol
|
---|
4656 | #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol
|
---|
4657 | #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections
|
---|
4658 | #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections
|
---|
4659 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section
|
---|
4660 | #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook
|
---|
4661 | #define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook
|
---|
4662 | #define elf_backend_grok_prstatus elf32_hppa_grok_prstatus
|
---|
4663 | #define elf_backend_grok_psinfo elf32_hppa_grok_psinfo
|
---|
4664 | #define elf_backend_object_p elf32_hppa_object_p
|
---|
4665 | #define elf_backend_final_write_processing elf_hppa_final_write_processing
|
---|
4666 | #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type
|
---|
4667 | #define elf_backend_reloc_type_class elf32_hppa_reloc_type_class
|
---|
4668 | #define elf_backend_action_discarded elf_hppa_action_discarded
|
---|
4669 |
|
---|
4670 | #define elf_backend_can_gc_sections 1
|
---|
4671 | #define elf_backend_can_refcount 1
|
---|
4672 | #define elf_backend_plt_alignment 2
|
---|
4673 | #define elf_backend_want_got_plt 0
|
---|
4674 | #define elf_backend_plt_readonly 0
|
---|
4675 | #define elf_backend_want_plt_sym 0
|
---|
4676 | #define elf_backend_got_header_size 8
|
---|
4677 | #define elf_backend_rela_normal 1
|
---|
4678 |
|
---|
4679 | #define TARGET_BIG_SYM hppa_elf32_vec
|
---|
4680 | #define TARGET_BIG_NAME "elf32-hppa"
|
---|
4681 | #define ELF_ARCH bfd_arch_hppa
|
---|
4682 | #define ELF_TARGET_ID HPPA32_ELF_DATA
|
---|
4683 | #define ELF_MACHINE_CODE EM_PARISC
|
---|
4684 | #define ELF_MAXPAGESIZE 0x1000
|
---|
4685 | #define ELF_OSABI ELFOSABI_HPUX
|
---|
4686 | #define elf32_bed elf32_hppa_hpux_bed
|
---|
4687 |
|
---|
4688 | #include "elf32-target.h"
|
---|
4689 |
|
---|
4690 | #undef TARGET_BIG_SYM
|
---|
4691 | #define TARGET_BIG_SYM hppa_elf32_linux_vec
|
---|
4692 | #undef TARGET_BIG_NAME
|
---|
4693 | #define TARGET_BIG_NAME "elf32-hppa-linux"
|
---|
4694 | #undef ELF_OSABI
|
---|
4695 | #define ELF_OSABI ELFOSABI_GNU
|
---|
4696 | #undef elf32_bed
|
---|
4697 | #define elf32_bed elf32_hppa_linux_bed
|
---|
4698 |
|
---|
4699 | #include "elf32-target.h"
|
---|
4700 |
|
---|
4701 | #undef TARGET_BIG_SYM
|
---|
4702 | #define TARGET_BIG_SYM hppa_elf32_nbsd_vec
|
---|
4703 | #undef TARGET_BIG_NAME
|
---|
4704 | #define TARGET_BIG_NAME "elf32-hppa-netbsd"
|
---|
4705 | #undef ELF_OSABI
|
---|
4706 | #define ELF_OSABI ELFOSABI_NETBSD
|
---|
4707 | #undef elf32_bed
|
---|
4708 | #define elf32_bed elf32_hppa_netbsd_bed
|
---|
4709 |
|
---|
4710 | #include "elf32-target.h"
|
---|