source: binutils/vendor/current/bfd/elf32-pj.c@ 1968

Last change on this file since 1968 was 1968, checked in by Silvan Scherrer, 8 years ago

binutils: update vendor to version 2.27. some files are missing, due to a svn bug with @ in the name. But as it's only in the testsuite I don't care atm
File size: 11.0 KB
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1/* picoJava specific support for 32-bit ELF
2 Copyright (C) 1999-2016 Free Software Foundation, Inc.
3 Contributed by Steve Chamberlan of Transmeta (sac@pobox.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22#include "sysdep.h"
23#include "bfd.h"
24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
27#include "elf/pj.h"
28
29/* This function is used for normal relocs. This is like the COFF
30 function, and is almost certainly incorrect for other ELF targets. */
31
32static bfd_reloc_status_type
33pj_elf_reloc (bfd *abfd,
34 arelent *reloc_entry,
35 asymbol *symbol_in,
36 void * data,
37 asection *input_section,
38 bfd *output_bfd,
39 char **error_message ATTRIBUTE_UNUSED)
40{
41 unsigned long insn;
42 bfd_vma sym_value;
43 enum elf_pj_reloc_type r_type;
44 bfd_vma addr = reloc_entry->address;
45 bfd_byte *hit_data = addr + (bfd_byte *) data;
46
47 r_type = (enum elf_pj_reloc_type) reloc_entry->howto->type;
48
49 if (output_bfd != NULL)
50 {
51 /* Partial linking--do nothing. */
52 reloc_entry->address += input_section->output_offset;
53 return bfd_reloc_ok;
54 }
55
56 if (symbol_in != NULL
57 && bfd_is_und_section (symbol_in->section))
58 return bfd_reloc_undefined;
59
60 if (bfd_is_com_section (symbol_in->section))
61 sym_value = 0;
62 else
63 sym_value = (symbol_in->value +
64 symbol_in->section->output_section->vma +
65 symbol_in->section->output_offset);
66
67 switch (r_type)
68 {
69 case R_PJ_DATA_DIR32:
70 insn = bfd_get_32 (abfd, hit_data);
71 insn += sym_value + reloc_entry->addend;
72 bfd_put_32 (abfd, (bfd_vma) insn, hit_data);
73 break;
74
75 /* Relocations in code are always bigendian, no matter what the
76 data endianness is. */
77
78 case R_PJ_CODE_DIR32:
79 insn = bfd_getb32 (hit_data);
80 insn += sym_value + reloc_entry->addend;
81 bfd_putb32 ((bfd_vma) insn, hit_data);
82 break;
83
84 case R_PJ_CODE_REL16:
85 insn = bfd_getb16 (hit_data);
86 insn += sym_value + reloc_entry->addend
87 - (input_section->output_section->vma
88 + input_section->output_offset);
89 bfd_putb16 ((bfd_vma) insn, hit_data);
90 break;
91 case R_PJ_CODE_LO16:
92 insn = bfd_getb16 (hit_data);
93 insn += sym_value + reloc_entry->addend;
94 bfd_putb16 ((bfd_vma) insn, hit_data);
95 break;
96
97 case R_PJ_CODE_HI16:
98 insn = bfd_getb16 (hit_data);
99 insn += (sym_value + reloc_entry->addend) >> 16;
100 bfd_putb16 ((bfd_vma) insn, hit_data);
101 break;
102
103 default:
104 abort ();
105 break;
106 }
107
108 return bfd_reloc_ok;
109}
110
111static reloc_howto_type pj_elf_howto_table[] =
112{
113 /* No relocation. */
114 HOWTO (R_PJ_NONE, /* type */
115 0, /* rightshift */
116 3, /* size (0 = byte, 1 = short, 2 = long) */
117 0, /* bitsize */
118 FALSE, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_dont, /* complain_on_overflow */
121 pj_elf_reloc, /* special_function */
122 "R_PJ_NONE", /* name */
123 FALSE, /* partial_inplace */
124 0, /* src_mask */
125 0, /* dst_mask */
126 FALSE), /* pcrel_offset */
127
128 /* 32 bit absolute relocation. Setting partial_inplace to TRUE and
129 src_mask to a non-zero value is similar to the COFF toolchain. */
130 HOWTO (R_PJ_DATA_DIR32, /* type */
131 0, /* rightshift */
132 2, /* size (0 = byte, 1 = short, 2 = long) */
133 32, /* bitsize */
134 FALSE, /* pc_relative */
135 0, /* bitpos */
136 complain_overflow_bitfield, /* complain_on_overflow */
137 pj_elf_reloc, /* special_function */
138 "R_PJ_DIR32", /* name */
139 TRUE, /* partial_inplace */
140 0xffffffff, /* src_mask */
141 0xffffffff, /* dst_mask */
142 FALSE), /* pcrel_offset */
143
144 /* 32 bit PC relative relocation. */
145 HOWTO (R_PJ_CODE_REL32, /* type */
146 0, /* rightshift */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
148 32, /* bitsize */
149 TRUE, /* pc_relative */
150 0, /* bitpos */
151 complain_overflow_signed, /* complain_on_overflow */
152 pj_elf_reloc, /* special_function */
153 "R_PJ_REL32", /* name */
154 FALSE, /* partial_inplace */
155 0, /* src_mask */
156 0xffffffff, /* dst_mask */
157 TRUE), /* pcrel_offset */
158
159/* 16 bit PC relative relocation. */
160 HOWTO (R_PJ_CODE_REL16, /* type */
161 0, /* rightshift */
162 1, /* size (0 = byte, 1 = short, 2 = long) */
163 16, /* bitsize */
164 TRUE, /* pc_relative */
165 0, /* bitpos */
166 complain_overflow_signed, /* complain_on_overf6w */
167 pj_elf_reloc, /* special_function */
168 "R_PJ_REL16", /* name */
169 FALSE, /* partial_inplace */
170 0xffff, /* src_mask */
171 0xffff, /* dst_mask */
172 TRUE), /* pcrel_offset */
173 EMPTY_HOWTO (4),
174 EMPTY_HOWTO (5),
175 HOWTO (R_PJ_CODE_DIR32, /* type */
176 0, /* rightshift */
177 2, /* size (0 = byte, 1 = short, 2 = long) */
178 32, /* bitsize */
179 FALSE, /* pc_relative */
180 0, /* bitpos */
181 complain_overflow_bitfield, /* complain_on_overflow */
182 pj_elf_reloc, /* special_function */
183 "R_PJ_CODE_DIR32", /* name */
184 TRUE, /* partial_inplace */
185 0xffffffff, /* src_mask */
186 0xffffffff, /* dst_mask */
187 FALSE), /* pcrel_offset */
188
189 EMPTY_HOWTO (7),
190 EMPTY_HOWTO (8),
191 EMPTY_HOWTO (9),
192 EMPTY_HOWTO (10),
193 EMPTY_HOWTO (11),
194 EMPTY_HOWTO (12),
195
196 HOWTO (R_PJ_CODE_LO16, /* type */
197 0, /* rightshift */
198 1, /* size (0 = byte, 1 = short, 2 = long) */
199 16, /* bitsize */
200 FALSE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_unsigned, /* complain_on_overflow */
203 pj_elf_reloc, /* special_function */
204 "R_PJ_LO16", /* name */
205 FALSE, /* partial_inplace */
206 0xffff, /* src_mask */
207 0xffff, /* dst_mask */
208 TRUE), /* pcrel_offset */
209
210 HOWTO (R_PJ_CODE_HI16, /* type */
211 16, /* rightshift */
212 1, /* size (0 = byte, 1 = short, 2 = long) */
213 16, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_unsigned, /* complain_on_overflow */
217 pj_elf_reloc, /* special_function */
218 "R_PJ_HI16", /* name */
219 FALSE, /* partial_inplace */
220 0xffff, /* src_mask */
221 0xffff, /* dst_mask */
222 TRUE), /* pcrel_offset */
223
224 /* GNU extension to record C++ vtable hierarchy. */
225 HOWTO (R_PJ_GNU_VTINHERIT, /* type */
226 0, /* rightshift */
227 2, /* size (0 = byte, 1 = short, 2 = long) */
228 0, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont, /* complain_on_overflow */
232 NULL, /* special_function */
233 "R_PJ_GNU_VTINHERIT", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 /* GNU extension to record C++ vtable member usage. */
240 HOWTO (R_PJ_GNU_VTENTRY, /* type */
241 0, /* rightshift */
242 2, /* size (0 = byte, 1 = short, 2 = long) */
243 0, /* bitsize */
244 FALSE, /* pc_relative */
245 0, /* bitpos */
246 complain_overflow_dont, /* complain_on_overflow */
247 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
248 "R_PJ_GNU_VTENTRY", /* name */
249 FALSE, /* partial_inplace */
250 0, /* src_mask */
251 0, /* dst_mask */
252 FALSE), /* pcrel_offset */
253};
254
255/* This structure is used to map BFD reloc codes to PJ ELF relocs. */
256
257struct elf_reloc_map
258{
259 bfd_reloc_code_real_type bfd_reloc_val;
260 unsigned char elf_reloc_val;
261};
262
263/* An array mapping BFD reloc codes to PJ ELF relocs. */
264
265static const struct elf_reloc_map pj_reloc_map[] =
266{
267 { BFD_RELOC_NONE, R_PJ_NONE },
268 { BFD_RELOC_32, R_PJ_DATA_DIR32 },
269 { BFD_RELOC_PJ_CODE_DIR16, R_PJ_CODE_DIR16 },
270 { BFD_RELOC_PJ_CODE_DIR32, R_PJ_CODE_DIR32 },
271 { BFD_RELOC_PJ_CODE_LO16, R_PJ_CODE_LO16 },
272 { BFD_RELOC_PJ_CODE_HI16, R_PJ_CODE_HI16 },
273 { BFD_RELOC_PJ_CODE_REL32, R_PJ_CODE_REL32 },
274 { BFD_RELOC_PJ_CODE_REL16, R_PJ_CODE_REL16 },
275 { BFD_RELOC_VTABLE_INHERIT, R_PJ_GNU_VTINHERIT },
276 { BFD_RELOC_VTABLE_ENTRY, R_PJ_GNU_VTENTRY },
277};
278
279/* Given a BFD reloc code, return the howto structure for the
280 corresponding PJ ELf reloc. */
281
282static reloc_howto_type *
283pj_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
284 bfd_reloc_code_real_type code)
285{
286 unsigned int i;
287
288 for (i = 0; i < sizeof (pj_reloc_map) / sizeof (struct elf_reloc_map); i++)
289 if (pj_reloc_map[i].bfd_reloc_val == code)
290 return & pj_elf_howto_table[(int) pj_reloc_map[i].elf_reloc_val];
291
292 return NULL;
293}
294
295static reloc_howto_type *
296pj_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
297 const char *r_name)
298{
299 unsigned int i;
300
301 for (i = 0;
302 i < sizeof (pj_elf_howto_table) / sizeof (pj_elf_howto_table[0]);
303 i++)
304 if (pj_elf_howto_table[i].name != NULL
305 && strcasecmp (pj_elf_howto_table[i].name, r_name) == 0)
306 return &pj_elf_howto_table[i];
307
308 return NULL;
309}
310
311/* Given an ELF reloc, fill in the howto field of a relent. */
312
313static void
314pj_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
315 arelent *cache_ptr,
316 Elf_Internal_Rela *dst)
317{
318 unsigned int r;
319
320 r = ELF32_R_TYPE (dst->r_info);
321
322 if (r >= R_PJ_max)
323 {
324 (*_bfd_error_handler) (_("%B: unrecognised PicoJava reloc number: %d"),
325 abfd, r);
326 bfd_set_error (bfd_error_bad_value);
327 r = R_PJ_NONE;
328 }
329
330 cache_ptr->howto = &pj_elf_howto_table[r];
331}
332
333/* Take this moment to fill in the special picoJava bits in the
334 e_flags field. */
335
336static void
337pj_elf_final_write_processing (bfd *abfd,
338 bfd_boolean linker ATTRIBUTE_UNUSED)
339{
340 elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_ARCH;
341 elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_GNUCALLS;
342}
343
344#define TARGET_BIG_SYM pj_elf32_vec
345#define TARGET_BIG_NAME "elf32-pj"
346#define TARGET_LITTLE_SYM pj_elf32_le_vec
347#define TARGET_LITTLE_NAME "elf32-pjl"
348#define ELF_ARCH bfd_arch_pj
349#define ELF_MACHINE_CODE EM_PJ
350#define ELF_MACHINE_ALT1 EM_PJ_OLD
351#define ELF_MAXPAGESIZE 0x1000
352#define bfd_elf32_bfd_get_relocated_section_contents \
353 bfd_generic_get_relocated_section_contents
354#define bfd_elf32_bfd_reloc_type_lookup pj_elf_reloc_type_lookup
355#define bfd_elf32_bfd_reloc_name_lookup pj_elf_reloc_name_lookup
356#define elf_backend_final_write_processing pj_elf_final_write_processing
357#define elf_info_to_howto pj_elf_info_to_howto
358#include "elf32-target.h"
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