gas/config/obj-coff.h

   1 /* coff object file format
   2    Copyright (C) 1989-2021 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_PPC
  44 #include "coff/rs6000.h"
  45 #endif
  46
  47 #ifdef TC_I386
  48 #ifdef TE_PEP
  49 #include "coff/x86_64.h"
  50 #else
  51 #include "coff/i386.h"
  52 #endif
  53
  54 #ifndef TARGET_FORMAT
  55 #ifdef TE_PEP
  56 #define TARGET_FORMAT "coff-x86-64"
  57 #else
  58 #define TARGET_FORMAT "coff-i386"
  59 #endif
  60 #endif
  61 #endif
  62
  63 #ifdef TC_Z80
  64 #include "coff/z80.h"
  65 #define TARGET_FORMAT "coff-z80"
  66 #endif
  67
  68 #ifdef TC_Z8K
  69 #include "coff/z8k.h"
  70 #define TARGET_FORMAT "coff-z8k"
  71 #endif
  72
  73 #ifdef TC_SH
  74
  75 #ifdef TE_PE
  76 #define COFF_WITH_PE
  77 #endif
  78
  79 #include "coff/sh.h"
  80
  81 #ifdef TE_PE
  82 #define TARGET_FORMAT "pe-shl"
  83 #else
  84
  85 #define TARGET_FORMAT                                   \
  86   (!target_big_endian                                   \
  87    ? (sh_small ? "coff-shl-small" : "coff-shl")         \
  88    : (sh_small ? "coff-sh-small" : "coff-sh"))
  89
  90 #endif
  91 #endif
  92
  93 #ifdef TC_TIC30
  94 #include "coff/tic30.h"
  95 #define TARGET_FORMAT "coff-tic30"
  96 #endif
  97
  98 #ifdef TC_TIC4X
  99 #include "coff/tic4x.h"
 100 #define TARGET_FORMAT "coff2-tic4x"
 101 #endif
 102
 103 #ifdef TC_TIC54X
 104 #include "coff/tic54x.h"
 105 #define TARGET_FORMAT "coff1-c54x"
 106 #endif
 107
 108 #ifdef TC_MCORE
 109 #include "coff/mcore.h"
 110 #ifndef TARGET_FORMAT
 111 #define TARGET_FORMAT "pe-mcore"
 112 #endif
 113 #endif
 114
 115 #ifdef TE_PE
 116 #define obj_set_weak_hook pecoff_obj_set_weak_hook
 117 #define obj_clear_weak_hook pecoff_obj_clear_weak_hook
 118 #endif
 119
 120 #ifndef OBJ_COFF_MAX_AUXENTRIES
 121 #define OBJ_COFF_MAX_AUXENTRIES 1
 122 #endif
 123
 124 #define obj_symbol_new_hook coff_obj_symbol_new_hook
 125 #define obj_symbol_clone_hook coff_obj_symbol_clone_hook
 126 #define obj_read_begin_hook coff_obj_read_begin_hook
 127
 128 #include "bfd/libcoff.h"
 129
 130 #define OUTPUT_FLAVOR bfd_target_coff_flavour
 131
 132 /* Alter the field names, for now, until we've fixed up the other
 133    references to use the new name.  */
 134 #define OBJ_SYMFIELD_TYPE       unsigned long
 135 #define sy_obj                  sy_obj_flags
 136
 137 /* We can't use the predefined section symbols in bfd/section.c, as
 138    COFF symbols have extra fields.  See bfd/libcoff.h:coff_symbol_type.  */
 139 #ifndef obj_sec_sym_ok_for_reloc
 140 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 141 #endif
 142
 143 #define SYM_AUXENT(S) \
 144   (&coffsymbol (symbol_get_bfdsym (S))->native[1].u.auxent)
 145 #define SYM_AUXINFO(S) \
 146   (&coffsymbol (symbol_get_bfdsym (S))->native[1])
 147
 148 /* The number of auxiliary entries.  */
 149 #define S_GET_NUMBER_AUXILIARY(s) \
 150   (coffsymbol (symbol_get_bfdsym (s))->native->u.syment.n_numaux)
 151 /* The number of auxiliary entries.  */
 152 #define S_SET_NUMBER_AUXILIARY(s, v)    (S_GET_NUMBER_AUXILIARY (s) = (v))
 153
 154 /* True if a symbol name is in the string table, i.e. its length is > 8.  */
 155 #define S_IS_STRING(s)          (strlen (S_GET_NAME (s)) > 8 ? 1 : 0)
 156
 157 /* Auxiliary entry macros. SA_ stands for symbol auxiliary.  */
 158 /* Omit the tv related fields.  */
 159 /* Accessors.  */
 160
 161 #define SA_GET_SYM_TAGNDX(s)    (SYM_AUXENT (s)->x_sym.x_tagndx.l)
 162 #define SA_GET_SYM_LNNO(s)      (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno)
 163 #define SA_GET_SYM_SIZE(s)      (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size)
 164 #define SA_GET_SYM_FSIZE(s)     (SYM_AUXENT (s)->x_sym.x_misc.x_fsize)
 165 #define SA_GET_SYM_LNNOPTR(s)   (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr)
 166 #define SA_GET_SYM_ENDNDX(s)    (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_endndx)
 167 #define SA_GET_SYM_DIMEN(s,i)   (SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)])
 168 #define SA_GET_FILE_FNAME(s)    (SYM_AUXENT (s)->x_file.x_fname)
 169 #define SA_GET_SCN_SCNLEN(s)    (SYM_AUXENT (s)->x_scn.x_scnlen)
 170 #define SA_GET_SCN_NRELOC(s)    (SYM_AUXENT (s)->x_scn.x_nreloc)
 171 #define SA_GET_SCN_NLINNO(s)    (SYM_AUXENT (s)->x_scn.x_nlinno)
 172
 173 #define SA_SET_SYM_LNNO(s,v)    (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno = (v))
 174 #define SA_SET_SYM_SIZE(s,v)    (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size = (v))
 175 #define SA_SET_SYM_FSIZE(s,v)   (SYM_AUXENT (s)->x_sym.x_misc.x_fsize = (v))
 176 #define SA_SET_SYM_LNNOPTR(s,v) (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr = (v))
 177 #define SA_SET_SYM_DIMEN(s,i,v) (SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)] = (v))
 178 #define SA_SET_FILE_FNAME(s,v)  strncpy (SYM_AUXENT (s)->x_file.x_fname, (v), FILNMLEN)
 179 #define SA_SET_SCN_SCNLEN(s,v)  (SYM_AUXENT (s)->x_scn.x_scnlen = (v))
 180 #define SA_SET_SCN_NRELOC(s,v)  (SYM_AUXENT (s)->x_scn.x_nreloc = (v))
 181 #define SA_SET_SCN_NLINNO(s,v)  (SYM_AUXENT (s)->x_scn.x_nlinno = (v))
 182
 183 #ifdef OBJ_XCOFF
 184 #define SA_GET_SECT_SCNLEN(s)   (SYM_AUXENT (s)->x_sect.x_scnlen)
 185 #define SA_GET_SECT_NRELOC(s)   (SYM_AUXENT (s)->x_sect.x_nreloc)
 186 #define SA_SET_SECT_SCNLEN(s,v) (SYM_AUXENT (s)->x_sect.x_scnlen = (v))
 187 #define SA_SET_SECT_NRELOC(s,v) (SYM_AUXENT (s)->x_sect.x_nreloc = (v))
 188 #endif
 189
 190 /* Internal use only definitions. SF_ stands for symbol flags.
 191
 192    These values can be assigned to sy_symbol.ost_flags field of a symbolS.  */
 193
 194 #define SF_NORMAL_MASK  0x0000ffff      /* bits 12-15 are general purpose.  */
 195
 196 #define SF_STATICS      0x00001000      /* Mark the .text & all symbols.  */
 197 #define SF_DEFINED      0x00002000      /* Symbol is defined in this file.  */
 198 #define SF_STRING       0x00004000      /* Symbol name length > 8.  */
 199 #define SF_LOCAL        0x00008000      /* Symbol must not be emitted.  */
 200
 201 #define SF_DEBUG_MASK   0xffff0000      /* bits 16-31 are debug info.  */
 202
 203 #define SF_FUNCTION     0x00010000      /* The symbol is a function.  */
 204 #define SF_PROCESS      0x00020000      /* Process symbol before write.  */
 205 #define SF_TAGGED       0x00040000      /* Is associated with a tag.  */
 206 #define SF_TAG          0x00080000      /* Is a tag.  */
 207 #define SF_DEBUG        0x00100000      /* Is in debug or abs section.  */
 208 #define SF_GET_SEGMENT  0x00200000      /* Get the section of the forward symbol.  */
 209 /* All other bits are unused.  */
 210
 211 /* Accessors.  */
 212 #define SF_GET(s)               (* symbol_get_obj (s))
 213 #define SF_GET_DEBUG(s)         (symbol_get_bfdsym (s)->flags & BSF_DEBUGGING)
 214 #define SF_SET_DEBUG(s)         (symbol_get_bfdsym (s)->flags |= BSF_DEBUGGING)
 215 #define SF_GET_NORMAL_FIELD(s)  (SF_GET (s) & SF_NORMAL_MASK)
 216 #define SF_GET_DEBUG_FIELD(s)   (SF_GET (s) & SF_DEBUG_MASK)
 217 #define SF_GET_FILE(s)          (SF_GET (s) & SF_FILE)
 218 #define SF_GET_STATICS(s)       (SF_GET (s) & SF_STATICS)
 219 #define SF_GET_DEFINED(s)       (SF_GET (s) & SF_DEFINED)
 220 #define SF_GET_STRING(s)        (SF_GET (s) & SF_STRING)
 221 #define SF_GET_LOCAL(s)         (SF_GET (s) & SF_LOCAL)
 222 #define SF_GET_FUNCTION(s)      (SF_GET (s) & SF_FUNCTION)
 223 #define SF_GET_PROCESS(s)       (SF_GET (s) & SF_PROCESS)
 224 #define SF_GET_TAGGED(s)        (SF_GET (s) & SF_TAGGED)
 225 #define SF_GET_TAG(s)           (SF_GET (s) & SF_TAG)
 226 #define SF_GET_GET_SEGMENT(s)   (SF_GET (s) & SF_GET_SEGMENT)
 227
 228 /* Modifiers.  */
 229 #define SF_SET(s,v)             (SF_GET (s) = (v))
 230 #define SF_SET_NORMAL_FIELD(s,v)(SF_GET (s) |= ((v) & SF_NORMAL_MASK))
 231 #define SF_SET_DEBUG_FIELD(s,v) (SF_GET (s) |= ((v) & SF_DEBUG_MASK))
 232 #define SF_SET_FILE(s)          (SF_GET (s) |= SF_FILE)
 233 #define SF_SET_STATICS(s)       (SF_GET (s) |= SF_STATICS)
 234 #define SF_SET_DEFINED(s)       (SF_GET (s) |= SF_DEFINED)
 235 #define SF_SET_STRING(s)        (SF_GET (s) |= SF_STRING)
 236 #define SF_SET_LOCAL(s)         (SF_GET (s) |= SF_LOCAL)
 237 #define SF_CLEAR_LOCAL(s)       (SF_GET (s) &= ~SF_LOCAL)
 238 #define SF_SET_FUNCTION(s)      (SF_GET (s) |= SF_FUNCTION)
 239 #define SF_SET_PROCESS(s)       (SF_GET (s) |= SF_PROCESS)
 240 #define SF_SET_TAGGED(s)        (SF_GET (s) |= SF_TAGGED)
 241 #define SF_SET_TAG(s)           (SF_GET (s) |= SF_TAG)
 242 #define SF_SET_GET_SEGMENT(s)   (SF_GET (s) |= SF_GET_SEGMENT)
 243
 244
 245 /*  Line number handling.  */
 246 extern int text_lineno_number;
 247 extern int coff_line_base;
 248 extern int coff_n_line_nos;
 249 extern symbolS *coff_last_function;
 250
 251 #define obj_emit_lineno(WHERE, LINE, FILE_START)        abort ()
 252 #define obj_app_file(name, app)      c_dot_file_symbol (name, app)
 253 #define obj_frob_symbol(S,P)         coff_frob_symbol (S, & P)
 254 #define obj_frob_section(S)          coff_frob_section (S)
 255 #define obj_frob_file_after_relocs() coff_frob_file_after_relocs ()
 256 #ifndef obj_adjust_symtab
 257 #define obj_adjust_symtab()          coff_adjust_symtab ()
 258 #endif
 259
 260 /* Forward the segment of a forwarded symbol, handle assignments that
 261    just copy symbol values, etc.  */
 262 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
 263 #ifndef TE_I386AIX
 264 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
 265   (SF_GET_GET_SEGMENT (dest) \
 266    ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
 267    : 0)
 268 #else
 269 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
 270   (SF_GET_GET_SEGMENT (dest) && S_GET_SEGMENT (dest) == SEG_UNKNOWN \
 271    ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
 272    : 0)
 273 #endif
 274 #endif
 275
 276 /* Sanity check.  */
 277
 278 extern const pseudo_typeS coff_pseudo_table[];
 279
 280 #ifndef obj_pop_insert
 281 #define obj_pop_insert() pop_insert (coff_pseudo_table)
 282 #endif
 283
 284 /* In COFF, if a symbol is defined using .def/.val SYM/.endef, it's OK
 285    to redefine the symbol later on.  This can happen if C symbols use
 286    a prefix, and a symbol is defined both with and without the prefix,
 287    as in start/_start/__start in gcc/libgcc1-test.c.  */
 288 #define RESOLVE_SYMBOL_REDEFINITION(sym)                \
 289 (SF_GET_GET_SEGMENT (sym)                               \
 290  ? (sym->frag = frag_now,                               \
 291     S_SET_VALUE (sym, frag_now_fix ()),                 \
 292     S_SET_SEGMENT (sym, now_seg),                       \
 293     0)                                                  \
 294  : 0)
 295
 296 /* Stabs in a coff file go into their own section.  */
 297 #define SEPARATE_STAB_SECTIONS 1
 298
 299 /* We need 12 bytes at the start of the section to hold some initial
 300    information.  */
 301 #define INIT_STAB_SECTION(seg) obj_coff_init_stab_section (seg)
 302
 303 /* Store the number of relocations in the section aux entry.  */
 304 #ifdef OBJ_XCOFF
 305 #define SET_SECTION_RELOCS(sec, relocs, n)              \
 306   do {                                                  \
 307     symbolS * sectSym = section_symbol (sec);           \
 308     if (S_GET_STORAGE_CLASS (sectSym) == C_DWARF)       \
 309       SA_SET_SECT_NRELOC (sectSym, n);                  \
 310     else                                                \
 311       SA_SET_SCN_NRELOC (sectSym, n);                   \
 312   } while (0)
 313 #else
 314 #define SET_SECTION_RELOCS(sec, relocs, n) \
 315   SA_SET_SCN_NRELOC (section_symbol (sec), n)
 316 #endif
 317
 318 #define obj_app_file(name, app) c_dot_file_symbol (name, app)
 319
 320 extern int  S_SET_DATA_TYPE              (symbolS *, int);
 321 extern int  S_SET_STORAGE_CLASS          (symbolS *, int);
 322 extern int  S_GET_STORAGE_CLASS          (symbolS *);
 323 extern void SA_SET_SYM_ENDNDX            (symbolS *, symbolS *);
 324 extern void coff_add_linesym             (symbolS *);
 325 extern void c_dot_file_symbol            (const char *, int);
 326 extern void coff_frob_symbol             (symbolS *, int *);
 327 extern void coff_adjust_symtab           (void);
 328 extern void coff_frob_section            (segT);
 329 extern void coff_adjust_section_syms     (bfd *, asection *, void *);
 330 extern void coff_frob_file_after_relocs  (void);
 331 extern void coff_obj_symbol_new_hook     (symbolS *);
 332 extern void coff_obj_symbol_clone_hook   (symbolS *, symbolS *);
 333 extern void coff_obj_read_begin_hook     (void);
 334 #ifdef TE_PE
 335 extern void pecoff_obj_set_weak_hook     (symbolS *);
 336 extern void pecoff_obj_clear_weak_hook   (symbolS *);
 337 #endif
 338 extern void obj_coff_section             (int);
 339 extern segT obj_coff_add_segment         (const char *);
 340 extern void obj_coff_section             (int);
 341 extern void c_dot_file_symbol            (const char *, int);
 342 extern segT s_get_segment                (symbolS *);
 343 #ifndef tc_coff_symbol_emit_hook
 344 extern void tc_coff_symbol_emit_hook     (symbolS *);
 345 #endif
 346 extern void obj_coff_pe_handle_link_once (void);
 347 extern void obj_coff_init_stab_section   (segT);
 348 extern void c_section_header             (struct internal_scnhdr *,
 349                                           char *, long, long, long, long,
 350                                           long, long, long, long);
 351 extern void obj_coff_seh_do_final (void);
 352
 353 #ifndef obj_coff_generate_pdata
 354 #define obj_coff_generate_pdata obj_coff_seh_do_final
 355 #endif
 356
 357
 358 #endif /* OBJ_FORMAT_H */