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5197 | serge | 1 | /* BFD ECOFF object file private structure. |
6324 | serge | 2 | Copyright (C) 1993-2015 Free Software Foundation, Inc. |
5197 | serge | 3 | Written by Ian Lance Taylor, Cygnus Support. |
4 | |||
5 | This file is part of BFD, the Binary File Descriptor library. |
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6 | |||
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 | |||
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 | |||
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 | |||
22 | #include "bfdlink.h" |
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23 | |||
24 | #ifndef ECOFF_H |
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25 | #include "coff/ecoff.h" |
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26 | #endif |
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27 | |||
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 | |||
33 | #define ecoff_backend(abfd) \ |
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34 | ((struct ecoff_backend_data *) (abfd)->xvec->backend_data) |
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35 | |||
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 | |||
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 | |||
83 | /* This is the target specific information kept for ECOFF files. */ |
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84 | |||
85 | #define ecoff_data(abfd) ((abfd)->tdata.ecoff_obj_data) |
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86 | |||
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 | |||
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 | |||
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 | |||
101 | /* The cached gp value. This is used when relocating. */ |
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102 | bfd_vma gp; |
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103 | |||
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 | |||
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 | |||
117 | /* The ECOFF symbolic debugging information. */ |
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118 | struct ecoff_debug_info debug_info; |
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119 | |||
120 | /* The unswapped ECOFF symbolic information. */ |
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121 | void * raw_syments; |
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122 | |||
123 | /* The canonical BFD symbols. */ |
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124 | struct ecoff_symbol_struct *canonical_symbols; |
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125 | |||
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 | |||
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 | |||
134 | /* TRUE if this BFD was written by the backend linker. */ |
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135 | bfd_boolean linker; |
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136 | |||
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 | |||
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 | |||
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 | |||
151 | } ecoff_data_type; |
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152 | |||
153 | /* Each canonical asymbol really looks like this. */ |
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154 | |||
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 | |||
160 | /* The fdr for this symbol. */ |
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161 | FDR *fdr; |
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162 | |||
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 | |||
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 | |||
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 | |||
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 | |||
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 | |||
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 | |||
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 | |||
202 | /* ECOFF linker hash table entries. */ |
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203 | |||
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 | |||
219 | /* ECOFF linker hash table. */ |
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220 | |||
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 | |||
226 | /* Make an ECOFF object. */ |
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227 | extern bfd_boolean _bfd_ecoff_mkobject (bfd *); |
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228 | |||
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 | |||
233 | /* Generic ECOFF BFD backend vectors. */ |
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234 | |||
235 | extern bfd_boolean _bfd_ecoff_write_object_contents (bfd *); |
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236 | |||
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 | |||
244 | #define _bfd_ecoff_bfd_link_split_section _bfd_generic_link_split_section |
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245 | |||
246 | extern bfd_boolean _bfd_ecoff_bfd_copy_private_bfd_data |
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247 | (bfd *, bfd *); |
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248 | #define _bfd_ecoff_bfd_copy_private_section_data \ |
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249 | _bfd_generic_bfd_copy_private_section_data |
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250 | |||
251 | #define _bfd_ecoff_bfd_copy_private_symbol_data \ |
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252 | _bfd_generic_bfd_copy_private_symbol_data |
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253 | |||
254 | #define _bfd_ecoff_bfd_copy_private_header_data \ |
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255 | _bfd_generic_bfd_copy_private_header_data |
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256 | |||
257 | #define _bfd_ecoff_bfd_print_private_bfd_data \ |
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258 | _bfd_generic_bfd_print_private_bfd_data |
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259 | |||
260 | #define _bfd_ecoff_bfd_merge_private_bfd_data \ |
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261 | _bfd_generic_bfd_merge_private_bfd_data |
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262 | |||
263 | #define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags |
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264 | extern bfd_boolean _bfd_ecoff_slurp_armap (bfd *); |
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265 | #define _bfd_ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table |
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266 | #define _bfd_ecoff_construct_extended_name_table \ |
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267 | _bfd_archive_bsd_construct_extended_name_table |
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268 | #define _bfd_ecoff_truncate_arname bfd_dont_truncate_arname |
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269 | extern bfd_boolean _bfd_ecoff_write_armap |
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270 | (bfd *, unsigned int, struct orl *, unsigned int, int); |
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271 | #define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr |
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272 | #define _bfd_ecoff_write_ar_hdr _bfd_generic_write_ar_hdr |
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273 | #define _bfd_ecoff_openr_next_archived_file \ |
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274 | bfd_generic_openr_next_archived_file |
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275 | #define _bfd_ecoff_get_elt_at_index _bfd_generic_get_elt_at_index |
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276 | #define _bfd_ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt |
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277 | #define _bfd_ecoff_update_armap_timestamp bfd_true |
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278 | #define _bfd_ecoff_bfd_is_target_special_symbol \ |
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279 | ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) |
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280 | |||
281 | extern long _bfd_ecoff_get_symtab_upper_bound (bfd *); |
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282 | extern long _bfd_ecoff_canonicalize_symtab (bfd *, asymbol **); |
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283 | extern asymbol *_bfd_ecoff_make_empty_symbol (bfd *); |
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284 | extern void _bfd_ecoff_print_symbol |
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285 | (bfd *, void *, asymbol *, bfd_print_symbol_type); |
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286 | extern void _bfd_ecoff_get_symbol_info |
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287 | (bfd *, asymbol *, symbol_info *); |
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6324 | serge | 288 | #define _bfd_ecoff_get_symbol_version_string \ |
289 | _bfd_nosymbols_get_symbol_version_string |
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5197 | serge | 290 | extern bfd_boolean _bfd_ecoff_bfd_is_local_label_name |
291 | (bfd *, const char *); |
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292 | #define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno |
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293 | extern bfd_boolean _bfd_ecoff_find_nearest_line |
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6324 | serge | 294 | (bfd *, asymbol **, asection *, bfd_vma, |
295 | const char **, const char **, unsigned int *, unsigned int *); |
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296 | #define _bfd_ecoff_find_line _bfd_nosymbols_find_line |
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5197 | serge | 297 | #define _bfd_ecoff_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
298 | #define _bfd_ecoff_read_minisymbols _bfd_generic_read_minisymbols |
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299 | #define _bfd_ecoff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol |
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300 | #define _bfd_ecoff_find_inliner_info _bfd_nosymbols_find_inliner_info |
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301 | |||
302 | #define _bfd_ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound |
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303 | extern long _bfd_ecoff_canonicalize_reloc |
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304 | (bfd *, asection *, arelent **, asymbol **symbols); |
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305 | /* ecoff_bfd_reloc_type_lookup defined by backend. */ |
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306 | |||
307 | extern bfd_boolean _bfd_ecoff_set_arch_mach |
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308 | (bfd *, enum bfd_architecture, unsigned long); |
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309 | extern bfd_boolean _bfd_ecoff_set_section_contents |
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310 | (bfd *, asection *, const void * location, file_ptr, bfd_size_type); |
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311 | |||
312 | extern int _bfd_ecoff_sizeof_headers (bfd *, struct bfd_link_info *); |
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313 | /* ecoff_bfd_get_relocated_section_contents defined by backend. */ |
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314 | /* ecoff_bfd_relax_section defined by backend. */ |
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315 | extern struct bfd_link_hash_table *_bfd_ecoff_bfd_link_hash_table_create |
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316 | (bfd *); |
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317 | extern bfd_boolean _bfd_ecoff_bfd_link_add_symbols |
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318 | (bfd *, struct bfd_link_info *); |
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319 | #define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms |
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320 | #define _bfd_ecoff_bfd_copy_link_hash_symbol_type \ |
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321 | _bfd_generic_copy_link_hash_symbol_type |
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322 | extern bfd_boolean _bfd_ecoff_bfd_final_link |
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323 | (bfd *, struct bfd_link_info *); |
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324 | |||
325 | /* Hook functions for the generic COFF section reading code. */ |
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326 | |||
327 | extern void * _bfd_ecoff_mkobject_hook (bfd *, void *, void *); |
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328 | #define _bfd_ecoff_set_alignment_hook \ |
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329 | ((void (*) (bfd *, asection *, void *)) bfd_void) |
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330 | extern bfd_boolean _bfd_ecoff_set_arch_mach_hook |
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331 | (bfd *, void *); |
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332 | extern bfd_boolean _bfd_ecoff_no_long_sections |
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333 | (bfd *abfd, int enable); |
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334 | extern bfd_boolean _bfd_ecoff_styp_to_sec_flags |
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335 | (bfd *, void *, const char *, asection *, flagword *); |
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336 | extern bfd_boolean _bfd_ecoff_slurp_symbol_table (bfd *); |
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337 | |||
338 | /* ECOFF auxiliary information swapping routines. These are the same |
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339 | for all ECOFF targets, so they are defined in ecofflink.c. */ |
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340 | |||
341 | extern void _bfd_ecoff_swap_tir_in |
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342 | (int, const struct tir_ext *, TIR *); |
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343 | extern void _bfd_ecoff_swap_tir_out |
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344 | (int, const TIR *, struct tir_ext *); |
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345 | extern void _bfd_ecoff_swap_rndx_in |
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346 | (int, const struct rndx_ext *, RNDXR *); |
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347 | extern void _bfd_ecoff_swap_rndx_out |
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348 | (int, const RNDXR *, struct rndx_ext *); |