gas/config/obj-coff.h

   1 /* coff object file format
   2    Copyright (C) 1989-2024 Free Software Foundation, Inc.
   3
   4    This file is part of GAS.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  19    02110-1301, USA.  */
  20
  21 #ifndef OBJ_FORMAT_H
  22 #define OBJ_FORMAT_H
  23
  24 #define OBJ_COFF 1
  25
  26 #include "targ-cpu.h"
  27
  28 /* This internal_lineno crap is to stop namespace pollution from the
  29    bfd internal coff headerfile.  */
  30 #define internal_lineno bfd_internal_lineno
  31 #include "coff/internal.h"
  32 #undef internal_lineno
  33
  34 /* CPU-specific setup:  */
  35
  36 #ifdef TC_ARM
  37 #include "coff/arm.h"
  38 #ifndef TARGET_FORMAT
  39 #define TARGET_FORMAT "coff-arm"
  40 #endif
  41 #endif
  42
  43 #ifdef TC_AARCH64
  44 #include "coff/aarch64.h"
  45 #endif
  46
  47 #ifdef TC_PPC
  48 #include "coff/rs6000.h"
  49 #endif
  50
  51 #ifdef TC_I386
  52 #include "coff/x86.h"
  53 #ifndef TARGET_FORMAT
  54 #ifdef TE_PEP
  55 #define TARGET_FORMAT "coff-x86-64"
  56 #else
  57 #define TARGET_FORMAT "coff-i386"
  58 #endif
  59 #endif
  60 #endif
  61
  62 #ifdef TC_Z80
  63 #include "coff/z80.h"
  64 #define TARGET_FORMAT "coff-z80"
  65 #endif
  66
  67 #ifdef TC_Z8K
  68 #include "coff/z8k.h"
  69 #define TARGET_FORMAT "coff-z8k"
  70 #endif
  71
  72 #ifdef TC_SH
  73
  74 #ifdef TE_PE
  75 #define COFF_WITH_PE
  76 #endif
  77
  78 #include "coff/sh.h"
  79
  80 #ifdef TE_PE
  81 #define TARGET_FORMAT "pe-shl"
  82 #else
  83
  84 #define TARGET_FORMAT                                   \
  85   (!target_big_endian                                   \
  86    ? (sh_small ? "coff-shl-small" : "coff-shl")         \
  87    : (sh_small ? "coff-sh-small" : "coff-sh"))
  88
  89 #endif
  90 #endif
  91
  92 #ifdef TC_TIC30
  93 #include "coff/tic30.h"
  94 #define TARGET_FORMAT "coff-tic30"
  95 #endif
  96
  97 #ifdef TC_TIC4X
  98 #include "coff/tic4x.h"
  99 #define TARGET_FORMAT "coff2-tic4x"
 100 #endif
 101
 102 #ifdef TC_TIC54X
 103 #include "coff/tic54x.h"
 104 #define TARGET_FORMAT "coff1-c54x"
 105 #endif
 106
 107 #ifdef TC_MCORE
 108 #include "coff/mcore.h"
 109 #ifndef TARGET_FORMAT
 110 #define TARGET_FORMAT "pe-mcore"
 111 #endif
 112 #endif
 113
 114 #ifdef TE_PE
 115 #define obj_set_weak_hook pecoff_obj_set_weak_hook
 116 #define obj_clear_weak_hook pecoff_obj_clear_weak_hook
 117 #endif
 118
 119 #ifndef OBJ_COFF_MAX_AUXENTRIES
 120 #define OBJ_COFF_MAX_AUXENTRIES 1
 121 #endif
 122
 123 #define obj_symbol_new_hook coff_obj_symbol_new_hook
 124 #define obj_symbol_clone_hook coff_obj_symbol_clone_hook
 125 #define obj_read_begin_hook coff_obj_read_begin_hook
 126
 127 #include "bfd/libcoff.h"
 128
 129 #define OUTPUT_FLAVOR bfd_target_coff_flavour
 130
 131 /* COFF symbol flags.  See SF_* macros.  */
 132 #define OBJ_SYMFIELD_TYPE       unsigned long
 133
 134 /* We can't use the predefined section symbols in bfd/section.c, as
 135    COFF symbols have extra fields.  See bfd/libcoff.h:coff_symbol_type.  */
 136 #ifndef obj_sec_sym_ok_for_reloc
 137 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 138 #endif
 139
 140 #define SYM_AUXENT(S) \
 141   (&coffsymbol (symbol_get_bfdsym (S))->native[1].u.auxent)
 142 #define SYM_AUXINFO(S) \
 143   (&coffsymbol (symbol_get_bfdsym (S))->native[1])
 144
 145 /* The number of auxiliary entries.  */
 146 #define S_GET_NUMBER_AUXILIARY(s) \
 147   (coffsymbol (symbol_get_bfdsym (s))->native->u.syment.n_numaux)
 148 /* The number of auxiliary entries.  */
 149 #define S_SET_NUMBER_AUXILIARY(s, v)    (S_GET_NUMBER_AUXILIARY (s) = (v))
 150
 151 /* True if a symbol name is in the string table, i.e. its length is > 8.  */
 152 #define S_IS_STRING(s)          (strlen (S_GET_NAME (s)) > 8 ? 1 : 0)
 153
 154 /* Auxiliary entry macros. SA_ stands for symbol auxiliary.  */
 155 /* Omit the tv related fields.  */
 156 /* Accessors.  */
 157
 158 #define SA_GET_SYM_TAGNDX(s)    (SYM_AUXENT (s)->x_sym.x_tagndx.u32)
 159 #define SA_GET_SYM_LNNO(s)      (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno)
 160 #define SA_GET_SYM_SIZE(s)      (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size)
 161 #define SA_GET_SYM_FSIZE(s)     (SYM_AUXENT (s)->x_sym.x_misc.x_fsize)
 162 #define SA_GET_SYM_LNNOPTR(s)   (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr)
 163 #define SA_GET_SYM_ENDNDX(s)    (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_endndx)
 164 #define SA_GET_SYM_DIMEN(s,i)   (SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)])
 165 #define SA_GET_FILE_FNAME(s)    (SYM_AUXENT (s)->x_file.x_fname)
 166 #define SA_GET_SCN_SCNLEN(s)    (SYM_AUXENT (s)->x_scn.x_scnlen)
 167 #define SA_GET_SCN_NRELOC(s)    (SYM_AUXENT (s)->x_scn.x_nreloc)
 168 #define SA_GET_SCN_NLINNO(s)    (SYM_AUXENT (s)->x_scn.x_nlinno)
 169
 170 #define SA_SET_SYM_LNNO(s,v)    (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno = (v))
 171 #define SA_SET_SYM_SIZE(s,v)    (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size = (v))
 172 #define SA_SET_SYM_FSIZE(s,v)   (SYM_AUXENT (s)->x_sym.x_misc.x_fsize = (v))
 173 #define SA_SET_SYM_LNNOPTR(s,v) (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr = (v))
 174 #define SA_SET_SYM_DIMEN(s,i,v) (SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)] = (v))
 175 #define SA_SET_FILE_FNAME(s,v)  strncpy (SYM_AUXENT (s)->x_file.x_fname, (v), FILNMLEN)
 176 #define SA_SET_SCN_SCNLEN(s,v)  (SYM_AUXENT (s)->x_scn.x_scnlen = (v))
 177 #define SA_SET_SCN_NRELOC(s,v)  (SYM_AUXENT (s)->x_scn.x_nreloc = (v))
 178 #define SA_SET_SCN_NLINNO(s,v)  (SYM_AUXENT (s)->x_scn.x_nlinno = (v))
 179
 180 #ifdef OBJ_XCOFF
 181 #define SA_GET_SECT_SCNLEN(s)   (SYM_AUXENT (s)->x_sect.x_scnlen)
 182 #define SA_GET_SECT_NRELOC(s)   (SYM_AUXENT (s)->x_sect.x_nreloc)
 183 #define SA_SET_SECT_SCNLEN(s,v) (SYM_AUXENT (s)->x_sect.x_scnlen = (v))
 184 #define SA_SET_SECT_NRELOC(s,v) (SYM_AUXENT (s)->x_sect.x_nreloc = (v))
 185 #endif
 186
 187 /* Internal use only definitions.  SF_ stands for symbol flags.  These
 188    values can be assigned to OBJ_SYMFIELD_TYPE obj field of a symbolS.  */
 189
 190 #define SF_NORMAL_MASK  0x0000ffff      /* bits 12-15 are general purpose.  */
 191
 192 #define SF_STATICS      0x00001000      /* Mark the .text & all symbols.  */
 193 #define SF_DEFINED      0x00002000      /* Symbol is defined in this file.  */
 194 #define SF_STRING       0x00004000      /* Symbol name length > 8.  */
 195 #define SF_LOCAL        0x00008000      /* Symbol must not be emitted.  */
 196
 197 #define SF_DEBUG_MASK   0xffff0000      /* bits 16-31 are debug info.  */
 198
 199 #define SF_FUNCTION     0x00010000      /* The symbol is a function.  */
 200 #define SF_PROCESS      0x00020000      /* Process symbol before write.  */
 201 #define SF_TAGGED       0x00040000      /* Is associated with a tag.  */
 202 #define SF_TAG          0x00080000      /* Is a tag.  */
 203 #define SF_DEBUG        0x00100000      /* Is in debug or abs section.  */
 204 #define SF_GET_SEGMENT  0x00200000      /* Get the section of the forward symbol.  */
 205 /* All other bits are unused.  */
 206
 207 /* Accessors.  */
 208 #define SF_GET(s)               (* symbol_get_obj (s))
 209 #define SF_GET_DEBUG(s)         (symbol_get_bfdsym (s)->flags & BSF_DEBUGGING)
 210 #define SF_SET_DEBUG(s)         (symbol_get_bfdsym (s)->flags |= BSF_DEBUGGING)
 211 #define SF_GET_NORMAL_FIELD(s)  (SF_GET (s) & SF_NORMAL_MASK)
 212 #define SF_GET_DEBUG_FIELD(s)   (SF_GET (s) & SF_DEBUG_MASK)
 213 #define SF_GET_FILE(s)          (SF_GET (s) & SF_FILE)
 214 #define SF_GET_STATICS(s)       (SF_GET (s) & SF_STATICS)
 215 #define SF_GET_DEFINED(s)       (SF_GET (s) & SF_DEFINED)
 216 #define SF_GET_STRING(s)        (SF_GET (s) & SF_STRING)
 217 #define SF_GET_LOCAL(s)         (SF_GET (s) & SF_LOCAL)
 218 #define SF_GET_FUNCTION(s)      (SF_GET (s) & SF_FUNCTION)
 219 #define SF_GET_PROCESS(s)       (SF_GET (s) & SF_PROCESS)
 220 #define SF_GET_TAGGED(s)        (SF_GET (s) & SF_TAGGED)
 221 #define SF_GET_TAG(s)           (SF_GET (s) & SF_TAG)
 222 #define SF_GET_GET_SEGMENT(s)   (SF_GET (s) & SF_GET_SEGMENT)
 223
 224 /* Modifiers.  */
 225 #define SF_SET(s,v)             (SF_GET (s) = (v))
 226 #define SF_SET_NORMAL_FIELD(s,v)(SF_GET (s) |= ((v) & SF_NORMAL_MASK))
 227 #define SF_SET_DEBUG_FIELD(s,v) (SF_GET (s) |= ((v) & SF_DEBUG_MASK))
 228 #define SF_SET_FILE(s)          (SF_GET (s) |= SF_FILE)
 229 #define SF_SET_STATICS(s)       (SF_GET (s) |= SF_STATICS)
 230 #define SF_SET_DEFINED(s)       (SF_GET (s) |= SF_DEFINED)
 231 #define SF_SET_STRING(s)        (SF_GET (s) |= SF_STRING)
 232 #define SF_SET_LOCAL(s)         (SF_GET (s) |= SF_LOCAL)
 233 #define SF_CLEAR_LOCAL(s)       (SF_GET (s) &= ~SF_LOCAL)
 234 #define SF_SET_FUNCTION(s)      (SF_GET (s) |= SF_FUNCTION)
 235 #define SF_SET_PROCESS(s)       (SF_GET (s) |= SF_PROCESS)
 236 #define SF_SET_TAGGED(s)        (SF_GET (s) |= SF_TAGGED)
 237 #define SF_SET_TAG(s)           (SF_GET (s) |= SF_TAG)
 238 #define SF_SET_GET_SEGMENT(s)   (SF_GET (s) |= SF_GET_SEGMENT)
 239
 240
 241 /*  Line number handling.  */
 242 extern int text_lineno_number;
 243 extern int coff_line_base;
 244 extern int coff_n_line_nos;
 245 extern symbolS *coff_last_function;
 246
 247 #define obj_emit_lineno(WHERE, LINE, FILE_START)        abort ()
 248 #define obj_app_file(name)           c_dot_file_symbol (name)
 249 #define obj_assign_symbol(S)         coff_assign_symbol (S)
 250 #define obj_frob_symbol(S,P)         coff_frob_symbol (S, & P)
 251 #define obj_frob_section(S)          coff_frob_section (S)
 252 #define obj_frob_file_after_relocs() coff_frob_file_after_relocs ()
 253 #ifndef obj_adjust_symtab
 254 #define obj_adjust_symtab()          coff_adjust_symtab ()
 255 #endif
 256
 257 /* Forward the segment of a forwarded symbol, handle assignments that
 258    just copy symbol values, etc.  */
 259 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
 260 #ifndef TE_I386AIX
 261 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
 262   (SF_GET_GET_SEGMENT (dest) \
 263    ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
 264    : 0)
 265 #else
 266 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
 267   (SF_GET_GET_SEGMENT (dest) && S_GET_SEGMENT (dest) == SEG_UNKNOWN \
 268    ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
 269    : 0)
 270 #endif
 271 #endif
 272
 273 extern void coff_pop_insert (void);
 274 #ifndef obj_pop_insert
 275 #define obj_pop_insert() coff_pop_insert ()
 276 #endif
 277
 278 /* In COFF, if a symbol is defined using .def/.val SYM/.endef, it's OK
 279    to redefine the symbol later on.  This can happen if C symbols use
 280    a prefix, and a symbol is defined both with and without the prefix,
 281    as in start/_start/__start in gcc/libgcc1-test.c.  */
 282 #define RESOLVE_SYMBOL_REDEFINITION(sym)                \
 283 (SF_GET_GET_SEGMENT (sym)                               \
 284  ? (sym->frag = frag_now,                               \
 285     S_SET_VALUE (sym, frag_now_fix ()),                 \
 286     S_SET_SEGMENT (sym, now_seg),                       \
 287     0)                                                  \
 288  : 0)
 289
 290 /* Stabs in a coff file go into their own section.  */
 291 #define SEPARATE_STAB_SECTIONS 1
 292
 293 /* We need 12 bytes at the start of the section to hold some initial
 294    information.  */
 295 #define INIT_STAB_SECTION(stab, str) obj_coff_init_stab_section (stab, str)
 296
 297 /* Store the number of relocations in the section aux entry.  */
 298 #ifdef OBJ_XCOFF
 299 #define SET_SECTION_RELOCS(sec, relocs, n)              \
 300   do {                                                  \
 301     symbolS * sectSym = section_symbol (sec);           \
 302     if (S_GET_STORAGE_CLASS (sectSym) == C_DWARF)       \
 303       SA_SET_SECT_NRELOC (sectSym, n);                  \
 304     else                                                \
 305       SA_SET_SCN_NRELOC (sectSym, n);                   \
 306   } while (0)
 307 #else
 308 #define SET_SECTION_RELOCS(sec, relocs, n) \
 309   SA_SET_SCN_NRELOC (section_symbol (sec), n)
 310 #endif
 311
 312 extern int  S_SET_DATA_TYPE              (symbolS *, int);
 313 extern int  S_SET_STORAGE_CLASS          (symbolS *, int);
 314 extern int  S_GET_STORAGE_CLASS          (symbolS *);
 315 extern void SA_SET_SYM_ENDNDX            (symbolS *, symbolS *);
 316 extern void coff_add_linesym             (symbolS *);
 317 extern void c_dot_file_symbol            (const char *);
 318 extern void coff_assign_symbol           (symbolS *);
 319 extern void coff_frob_symbol             (symbolS *, int *);
 320 extern void coff_adjust_symtab           (void);
 321 extern void coff_frob_section            (segT);
 322 extern void coff_adjust_section_syms     (bfd *, asection *, void *);
 323 extern void coff_frob_file_after_relocs  (void);
 324 extern void coff_obj_symbol_new_hook     (symbolS *);
 325 extern void coff_obj_symbol_clone_hook   (symbolS *, symbolS *);
 326 extern void coff_obj_read_begin_hook     (void);
 327 #ifdef TE_PE
 328 extern void pecoff_obj_set_weak_hook     (symbolS *);
 329 extern void pecoff_obj_clear_weak_hook   (symbolS *);
 330 #endif
 331 extern void obj_coff_section             (int);
 332 extern segT obj_coff_add_segment         (const char *);
 333 extern void obj_coff_section             (int);
 334 extern segT s_get_segment                (symbolS *);
 335 #ifndef tc_coff_symbol_emit_hook
 336 extern void tc_coff_symbol_emit_hook     (symbolS *);
 337 #endif
 338 extern void obj_coff_pe_handle_link_once (void);
 339 extern void obj_coff_init_stab_section   (segT, segT);
 340 extern void c_section_header             (struct internal_scnhdr *,
 341                                           char *, long, long, long, long,
 342                                           long, long, long, long);
 343 extern void obj_coff_seh_do_final (void);
 344
 345 #ifndef obj_coff_generate_pdata
 346 #define obj_coff_generate_pdata obj_coff_seh_do_final
 347 #endif
 348
 349
 350 #endif /* OBJ_FORMAT_H */