| 1 | /* BFD ECOFF object file private structure.
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| 2 | Copyright (C) 1993-2016 Free Software Foundation, Inc.
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| 3 | Written by Ian Lance Taylor, Cygnus Support.
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| 4 |
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| 5 | This file is part of BFD, the Binary File Descriptor library.
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| 6 |
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| 7 | This program is free software; you can redistribute it and/or modify
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| 8 | it under the terms of the GNU General Public License as published by
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| 9 | the Free Software Foundation; either version 3 of the License, or
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| 10 | (at your option) any later version.
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| 11 |
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| 12 | This program is distributed in the hope that it will be useful,
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | GNU General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with this program; if not, write to the Free Software
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| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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| 20 | MA 02110-1301, USA. */
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| 21 |
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| 22 | #include "bfdlink.h"
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| 23 |
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| 24 | #ifndef ECOFF_H
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| 25 | #include "coff/ecoff.h"
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| 26 | #endif
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| 27 |
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| 28 | /* This is the backend information kept for ECOFF files. This
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| 29 | structure is constant for a particular backend. The first element
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| 30 | is the COFF backend data structure, so that ECOFF targets can use
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| 31 | the generic COFF code. */
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| 32 |
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| 33 | #define ecoff_backend(abfd) \
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| 34 | ((struct ecoff_backend_data *) (abfd)->xvec->backend_data)
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| 35 |
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| 36 | struct ecoff_backend_data
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| 37 | {
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| 38 | /* COFF backend information. This must be the first field. */
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| 39 | bfd_coff_backend_data coff;
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| 40 | /* Supported architecture. */
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| 41 | enum bfd_architecture arch;
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| 42 | /* Initial portion of armap string. */
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| 43 | const char *armap_start;
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| 44 | /* The page boundary used to align sections in a demand-paged
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| 45 | executable file. E.g., 0x1000. */
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| 46 | bfd_vma round;
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| 47 | /* TRUE if the .rdata section is part of the text segment, as on the
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| 48 | Alpha. FALSE if .rdata is part of the data segment, as on the
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| 49 | MIPS. */
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| 50 | bfd_boolean rdata_in_text;
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| 51 | /* Bitsize of constructor entries. */
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| 52 | unsigned int constructor_bitsize;
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| 53 | /* Reloc to use for constructor entries. */
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| 54 | reloc_howto_type *constructor_reloc;
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| 55 | /* How to swap debugging information. */
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| 56 | struct ecoff_debug_swap debug_swap;
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| 57 | /* External reloc size. */
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| 58 | bfd_size_type external_reloc_size;
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| 59 | /* Reloc swapping functions. */
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| 60 | void (*swap_reloc_in) (bfd *, void *, struct internal_reloc *);
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| 61 | void (*swap_reloc_out) (bfd *, const struct internal_reloc *, void *);
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| 62 | /* Backend reloc tweaking. */
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| 63 | void (*adjust_reloc_in)
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| 64 | (bfd *, const struct internal_reloc *, arelent *);
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| 65 | void (*adjust_reloc_out)
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| 66 | (bfd *, const arelent *, struct internal_reloc *);
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| 67 | /* Relocate section contents while linking. */
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| 68 | bfd_boolean (*relocate_section)
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| 69 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, void *);
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| 70 | /* Do final adjustments to filehdr and aouthdr. */
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| 71 | bfd_boolean (*adjust_headers)
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| 72 | (bfd *, struct internal_filehdr *, struct internal_aouthdr *);
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| 73 | /* Read an element from an archive at a given file position. This
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| 74 | is needed because OSF/1 3.2 uses a weird archive format. */
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| 75 | bfd *(*get_elt_at_filepos) (bfd *, file_ptr);
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| 76 | };
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| 77 |
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| 78 | /* ECOFF targets don't support COFF long section names, so this
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| 79 | macro is provided to use as an initialiser for the related
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| 80 | members of the embedded bfd_coff_backend_data struct. */
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| 81 | #define ECOFF_NO_LONG_SECTION_NAMES (FALSE), _bfd_ecoff_no_long_sections
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| 82 |
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| 83 | /* This is the target specific information kept for ECOFF files. */
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| 84 |
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| 85 | #define ecoff_data(abfd) ((abfd)->tdata.ecoff_obj_data)
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| 86 |
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| 87 | typedef struct ecoff_tdata
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| 88 | {
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| 89 | /* The reloc file position, set by
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| 90 | ecoff_compute_section_file_positions. */
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| 91 | file_ptr reloc_filepos;
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| 92 |
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| 93 | /* The symbol table file position, set by _bfd_ecoff_mkobject_hook. */
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| 94 | file_ptr sym_filepos;
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| 95 |
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| 96 | /* The start and end of the text segment. Only valid for an
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| 97 | existing file, not for one we are creating. */
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| 98 | unsigned long text_start;
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| 99 | unsigned long text_end;
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| 100 |
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| 101 | /* The cached gp value. This is used when relocating. */
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| 102 | bfd_vma gp;
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| 103 |
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| 104 | /* The maximum size of objects to optimize using gp. This is
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| 105 | typically set by the -G option to the compiler, assembler or
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| 106 | linker. */
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| 107 | unsigned int gp_size;
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| 108 |
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| 109 | /* The register masks. When linking, all the masks found in the
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| 110 | input files are combined into the masks of the output file.
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| 111 | These are not all used for all targets, but that's OK, because
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| 112 | the relevant ones are the only ones swapped in and out. */
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| 113 | unsigned long gprmask;
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| 114 | unsigned long fprmask;
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| 115 | unsigned long cprmask[4];
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| 116 |
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| 117 | /* The ECOFF symbolic debugging information. */
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| 118 | struct ecoff_debug_info debug_info;
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| 119 |
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| 120 | /* The unswapped ECOFF symbolic information. */
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| 121 | void * raw_syments;
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| 122 |
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| 123 | /* The canonical BFD symbols. */
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| 124 | struct ecoff_symbol_struct *canonical_symbols;
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| 125 |
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| 126 | /* A mapping from external symbol numbers to entries in the linker
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| 127 | hash table, used when linking. */
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| 128 | struct ecoff_link_hash_entry **sym_hashes;
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| 129 |
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| 130 | /* A mapping from reloc symbol indices to sections, used when
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| 131 | linking. */
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| 132 | asection **symndx_to_section;
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| 133 |
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| 134 | /* TRUE if this BFD was written by the backend linker. */
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| 135 | bfd_boolean linker;
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| 136 |
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| 137 | /* TRUE if a warning that multiple global pointer values are
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| 138 | needed in the output binary was issued already. */
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| 139 | bfd_boolean issued_multiple_gp_warning;
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| 140 |
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| 141 | /* Used by find_nearest_line entry point. The structure could be
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| 142 | included directly in this one, but there's no point to wasting
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| 143 | the memory just for the infrequently called find_nearest_line. */
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| 144 | struct ecoff_find_line *find_line_info;
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| 145 |
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| 146 | /* Whether the .rdata section is in the text segment for this
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| 147 | particular ECOFF file. This is not valid until
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| 148 | ecoff_compute_section_file_positions is called. */
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| 149 | bfd_boolean rdata_in_text;
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| 150 |
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| 151 | } ecoff_data_type;
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| 152 |
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| 153 | /* Each canonical asymbol really looks like this. */
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| 154 |
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| 155 | typedef struct ecoff_symbol_struct
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| 156 | {
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| 157 | /* The actual symbol which the rest of BFD works with */
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| 158 | asymbol symbol;
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| 159 |
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| 160 | /* The fdr for this symbol. */
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| 161 | FDR *fdr;
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| 162 |
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| 163 | /* TRUE if this is a local symbol rather than an external one. */
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| 164 | bfd_boolean local;
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| 165 |
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| 166 | /* A pointer to the unswapped hidden information for this symbol.
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| 167 | This is either a struct sym_ext or a struct ext_ext, depending on
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| 168 | the value of the local field above. */
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| 169 | void * native;
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| 170 | } ecoff_symbol_type;
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| 171 |
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| 172 | /* We take the address of the first element of an asymbol to ensure that the
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| 173 | macro is only ever applied to an asymbol. */
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| 174 | #define ecoffsymbol(asymbol) ((ecoff_symbol_type *) (&((asymbol)->the_bfd)))
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| 175 |
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| 176 | /* We need to save the index of an external symbol when we write it
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| 177 | out so that can set the symbol index correctly when we write out
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| 178 | the relocs. */
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| 179 | #define ecoff_get_sym_index(symbol) ((symbol)->udata.i)
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| 180 | #define ecoff_set_sym_index(symbol, idx) ((symbol)->udata.i = (idx))
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| 181 |
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| 182 | /* A pointer to this structure is put in the used_by_bfd pointer of
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| 183 | a section to keep track of any per-section data.
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| 184 | The user_by_bfd pointer will be NULL if the information was not
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| 185 | needed. */
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| 186 |
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| 187 | struct ecoff_section_tdata
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| 188 | {
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| 189 | /* When producing an executable (i.e., final, non-relocatable link)
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| 190 | on the Alpha, we may need to use multiple global pointer values
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| 191 | to span the entire .lita section. In essence, we allow each
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| 192 | input .lita section to have its own gp value. To support this,
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| 193 | we need to keep track of the gp values that we picked for each
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| 194 | input .lita section . */
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| 195 | bfd_vma gp;
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| 196 | };
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| 197 |
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| 198 | /* An accessor macro for the ecoff_section_tdata structure. */
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| 199 | #define ecoff_section_data(abfd, sec) \
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| 200 | ((struct ecoff_section_tdata *) (sec)->used_by_bfd)
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| 201 |
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| 202 | /* ECOFF linker hash table entries. */
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| 203 |
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| 204 | struct ecoff_link_hash_entry
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| 205 | {
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| 206 | struct bfd_link_hash_entry root;
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| 207 | /* Symbol index in output file. */
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| 208 | long indx;
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| 209 | /* BFD that ext field value came from. */
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| 210 | bfd *abfd;
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| 211 | /* ECOFF external symbol information. */
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| 212 | EXTR esym;
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| 213 | /* Nonzero if this symbol has been written out. */
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| 214 | char written;
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| 215 | /* Nonzero if this symbol was referred to as small undefined. */
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| 216 | char small;
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| 217 | };
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| 218 |
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| 219 | /* ECOFF linker hash table. */
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| 220 |
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| 221 | struct ecoff_link_hash_table
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| 222 | {
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| 223 | struct bfd_link_hash_table root;
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| 224 | };
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| 225 |
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| 226 | /* Make an ECOFF object. */
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| 227 | extern bfd_boolean _bfd_ecoff_mkobject (bfd *);
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| 228 |
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| 229 | /* Read in the ECOFF symbolic debugging information. */
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| 230 | extern bfd_boolean _bfd_ecoff_slurp_symbolic_info
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| 231 | (bfd *, asection *, struct ecoff_debug_info *);
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| 232 |
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| 233 | /* Generic ECOFF BFD backend vectors. */
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| 234 |
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| 235 | extern bfd_boolean _bfd_ecoff_write_object_contents (bfd *);
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| 236 |
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| 237 | #define _bfd_ecoff_close_and_cleanup _bfd_generic_close_and_cleanup
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| 238 | #define _bfd_ecoff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
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| 239 | extern bfd_boolean _bfd_ecoff_new_section_hook
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| 240 | (bfd *, asection *);
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| 241 | extern bfd_boolean _bfd_ecoff_get_section_contents
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| 242 | (bfd *, asection *, void * location, file_ptr, bfd_size_type);
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| 243 |
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| 244 | #define _bfd_ecoff_bfd_link_split_section _bfd_generic_link_split_section
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| 245 | #define _bfd_ecoff_bfd_link_check_relocs _bfd_generic_link_check_relocs
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| 246 |
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| 247 | extern bfd_boolean _bfd_ecoff_bfd_copy_private_bfd_data
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| 248 | (bfd *, bfd *);
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| 249 | #define _bfd_ecoff_bfd_copy_private_section_data \
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| 250 | _bfd_generic_bfd_copy_private_section_data
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| 251 |
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| 252 | #define _bfd_ecoff_bfd_copy_private_symbol_data \
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| 253 | _bfd_generic_bfd_copy_private_symbol_data
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| 254 |
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| 255 | #define _bfd_ecoff_bfd_copy_private_header_data \
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| 256 | _bfd_generic_bfd_copy_private_header_data
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| 257 |
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| 258 | #define _bfd_ecoff_bfd_print_private_bfd_data \
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| 259 | _bfd_generic_bfd_print_private_bfd_data
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| 260 |
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| 261 | #define _bfd_ecoff_bfd_merge_private_bfd_data \
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| 262 | _bfd_generic_bfd_merge_private_bfd_data
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| 263 |
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| 264 | #define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
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| 265 | extern bfd_boolean _bfd_ecoff_slurp_armap (bfd *);
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| 266 | #define _bfd_ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table
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| 267 | #define _bfd_ecoff_construct_extended_name_table \
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| 268 | _bfd_archive_bsd_construct_extended_name_table
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| 269 | #define _bfd_ecoff_truncate_arname bfd_dont_truncate_arname
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| 270 | extern bfd_boolean _bfd_ecoff_write_armap
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| 271 | (bfd *, unsigned int, struct orl *, unsigned int, int);
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| 272 | #define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr
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| 273 | #define _bfd_ecoff_write_ar_hdr _bfd_generic_write_ar_hdr
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| 274 | #define _bfd_ecoff_openr_next_archived_file \
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| 275 | bfd_generic_openr_next_archived_file
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| 276 | #define _bfd_ecoff_get_elt_at_index _bfd_generic_get_elt_at_index
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| 277 | #define _bfd_ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt
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| 278 | #define _bfd_ecoff_update_armap_timestamp bfd_true
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| 279 | #define _bfd_ecoff_bfd_is_target_special_symbol \
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| 280 | ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
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| 281 |
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| 282 | extern long _bfd_ecoff_get_symtab_upper_bound (bfd *);
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| 283 | extern long _bfd_ecoff_canonicalize_symtab (bfd *, asymbol **);
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| 284 | extern asymbol *_bfd_ecoff_make_empty_symbol (bfd *);
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| 285 | extern void _bfd_ecoff_print_symbol
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| 286 | (bfd *, void *, asymbol *, bfd_print_symbol_type);
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| 287 | extern void _bfd_ecoff_get_symbol_info
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| 288 | (bfd *, asymbol *, symbol_info *);
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| 289 | #define _bfd_ecoff_get_symbol_version_string \
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| 290 | _bfd_nosymbols_get_symbol_version_string
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| 291 | extern bfd_boolean _bfd_ecoff_bfd_is_local_label_name
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| 292 | (bfd *, const char *);
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| 293 | #define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno
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| 294 | extern bfd_boolean _bfd_ecoff_find_nearest_line
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| 295 | (bfd *, asymbol **, asection *, bfd_vma,
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| 296 | const char **, const char **, unsigned int *, unsigned int *);
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| 297 | #define _bfd_ecoff_find_line _bfd_nosymbols_find_line
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| 298 | #define _bfd_ecoff_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
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| 299 | #define _bfd_ecoff_read_minisymbols _bfd_generic_read_minisymbols
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| 300 | #define _bfd_ecoff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
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| 301 | #define _bfd_ecoff_find_inliner_info _bfd_nosymbols_find_inliner_info
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| 302 |
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| 303 | #define _bfd_ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound
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| 304 | extern long _bfd_ecoff_canonicalize_reloc
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| 305 | (bfd *, asection *, arelent **, asymbol **symbols);
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| 306 | /* ecoff_bfd_reloc_type_lookup defined by backend. */
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| 307 |
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| 308 | extern bfd_boolean _bfd_ecoff_set_arch_mach
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| 309 | (bfd *, enum bfd_architecture, unsigned long);
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| 310 | extern bfd_boolean _bfd_ecoff_set_section_contents
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| 311 | (bfd *, asection *, const void * location, file_ptr, bfd_size_type);
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| 312 |
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| 313 | extern int _bfd_ecoff_sizeof_headers (bfd *, struct bfd_link_info *);
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| 314 | /* ecoff_bfd_get_relocated_section_contents defined by backend. */
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| 315 | /* ecoff_bfd_relax_section defined by backend. */
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| 316 | extern struct bfd_link_hash_table *_bfd_ecoff_bfd_link_hash_table_create
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| 317 | (bfd *);
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| 318 | extern bfd_boolean _bfd_ecoff_bfd_link_add_symbols
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| 319 | (bfd *, struct bfd_link_info *);
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| 320 | #define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms
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| 321 | #define _bfd_ecoff_bfd_copy_link_hash_symbol_type \
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| 322 | _bfd_generic_copy_link_hash_symbol_type
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| 323 | extern bfd_boolean _bfd_ecoff_bfd_final_link
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| 324 | (bfd *, struct bfd_link_info *);
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| 325 |
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| 326 | /* Hook functions for the generic COFF section reading code. */
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| 327 |
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| 328 | extern void * _bfd_ecoff_mkobject_hook (bfd *, void *, void *);
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| 329 | #define _bfd_ecoff_set_alignment_hook \
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| 330 | ((void (*) (bfd *, asection *, void *)) bfd_void)
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| 331 | extern bfd_boolean _bfd_ecoff_set_arch_mach_hook
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| 332 | (bfd *, void *);
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| 333 | extern bfd_boolean _bfd_ecoff_no_long_sections
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| 334 | (bfd *abfd, int enable);
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| 335 | extern bfd_boolean _bfd_ecoff_styp_to_sec_flags
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| 336 | (bfd *, void *, const char *, asection *, flagword *);
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| 337 | extern bfd_boolean _bfd_ecoff_slurp_symbol_table (bfd *);
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| 338 |
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| 339 | /* ECOFF auxiliary information swapping routines. These are the same
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| 340 | for all ECOFF targets, so they are defined in ecofflink.c. */
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| 341 |
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| 342 | extern void _bfd_ecoff_swap_tir_in
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| 343 | (int, const struct tir_ext *, TIR *);
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| 344 | extern void _bfd_ecoff_swap_tir_out
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| 345 | (int, const TIR *, struct tir_ext *);
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| 346 | extern void _bfd_ecoff_swap_rndx_in
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| 347 | (int, const struct rndx_ext *, RNDXR *);
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| 348 | extern void _bfd_ecoff_swap_rndx_out
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| 349 | (int, const RNDXR *, struct rndx_ext *);
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