gas/config/obj-coff.h

   1 /* coff object file format
   2    Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GAS.
   7
   8    GAS is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3, or (at your option)
  11    any later version.
  12
  13    GAS is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GAS; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #ifndef OBJ_FORMAT_H
  24 #define OBJ_FORMAT_H
  25
  26 #define OBJ_COFF 1
  27
  28 #include "targ-cpu.h"
  29
  30 /* This internal_lineno crap is to stop namespace pollution from the
  31    bfd internal coff headerfile.  */
  32 #define internal_lineno bfd_internal_lineno
  33 #include "coff/internal.h"
  34 #undef internal_lineno
  35
  36 /* CPU-specific setup:  */
  37
  38 #ifdef TC_ARM
  39 #include "coff/arm.h"
  40 #ifndef TARGET_FORMAT
  41 #define TARGET_FORMAT "coff-arm"
  42 #endif
  43 #endif
  44
  45 #ifdef TC_PPC
  46 #ifdef TE_PE
  47 #include "coff/powerpc.h"
  48 #else
  49 #include "coff/rs6000.h"
  50 #endif
  51 #endif
  52
  53 #ifdef TC_SPARC
  54 #include "coff/sparc.h"
  55 #endif
  56
  57 #ifdef TC_I386
  58 #ifdef TE_PEP
  59 #include "coff/x86_64.h"
  60 #else
  61 #include "coff/i386.h"
  62 #endif
  63
  64 #ifndef TARGET_FORMAT
  65 #ifdef TE_PEP
  66 #define TARGET_FORMAT "coff-x86-64"
  67 #else
  68 #define TARGET_FORMAT "coff-i386"
  69 #endif
  70 #endif
  71 #endif
  72
  73 #ifdef TC_M68K
  74 #include "coff/m68k.h"
  75 #ifndef TARGET_FORMAT
  76 #define TARGET_FORMAT "coff-m68k"
  77 #endif
  78 #endif
  79
  80 #ifdef TC_OR32
  81 #include "coff/or32.h"
  82 #define TARGET_FORMAT "coff-or32-big"
  83 #endif
  84
  85 #ifdef TC_I960
  86 #include "coff/i960.h"
  87 #define TARGET_FORMAT "coff-Intel-little"
  88 #endif
  89
  90 #ifdef TC_Z80
  91 #include "coff/z80.h"
  92 #define TARGET_FORMAT "coff-z80"
  93 #endif
  94
  95 #ifdef TC_Z8K
  96 #include "coff/z8k.h"
  97 #define TARGET_FORMAT "coff-z8k"
  98 #endif
  99
 100 #ifdef TC_H8300
 101 #include "coff/h8300.h"
 102 #define TARGET_FORMAT "coff-h8300"
 103 #endif
 104
 105 #ifdef TC_H8500
 106 #include "coff/h8500.h"
 107 #define TARGET_FORMAT "coff-h8500"
 108 #endif
 109
 110 #ifdef TC_MAXQ20
 111 #include "coff/maxq.h"
 112 #define TARGET_FORMAT "coff-maxq"
 113 #endif
 114
 115 #ifdef TC_SH
 116
 117 #ifdef TE_PE
 118 #define COFF_WITH_PE
 119 #endif
 120
 121 #include "coff/sh.h"
 122
 123 #ifdef TE_PE
 124 #define TARGET_FORMAT "pe-shl"
 125 #else
 126
 127 #define TARGET_FORMAT                                   \
 128   (!target_big_endian                                   \
 129    ? (sh_small ? "coff-shl-small" : "coff-shl")         \
 130    : (sh_small ? "coff-sh-small" : "coff-sh"))
 131
 132 #endif
 133 #endif
 134
 135 #ifdef TC_MIPS
 136 #define COFF_WITH_PE
 137 #include "coff/mipspe.h"
 138 #undef  TARGET_FORMAT
 139 #define TARGET_FORMAT "pe-mips"
 140 #endif
 141
 142 #ifdef TC_TIC30
 143 #include "coff/tic30.h"
 144 #define TARGET_FORMAT "coff-tic30"
 145 #endif
 146
 147 #ifdef TC_TIC4X
 148 #include "coff/tic4x.h"
 149 #define TARGET_FORMAT "coff2-tic4x"
 150 #endif
 151
 152 #ifdef TC_TIC54X
 153 #include "coff/tic54x.h"
 154 #define TARGET_FORMAT "coff1-c54x"
 155 #endif
 156
 157 #ifdef TC_MCORE
 158 #include "coff/mcore.h"
 159 #ifndef TARGET_FORMAT
 160 #define TARGET_FORMAT "pe-mcore"
 161 #endif
 162 #endif
 163
 164 #ifdef TE_PE
 165 /* PE weak symbols need USE_UNIQUE.  */
 166 #define USE_UNIQUE 1
 167
 168 #define obj_set_weak_hook pecoff_obj_set_weak_hook
 169 #define obj_clear_weak_hook pecoff_obj_clear_weak_hook
 170 #endif
 171
 172 #ifndef OBJ_COFF_MAX_AUXENTRIES
 173 #define OBJ_COFF_MAX_AUXENTRIES 1
 174 #endif
 175
 176 #define obj_symbol_new_hook coff_obj_symbol_new_hook
 177 #define obj_symbol_clone_hook coff_obj_symbol_clone_hook
 178 #define obj_read_begin_hook coff_obj_read_begin_hook
 179
 180 #include "bfd/libcoff.h"
 181
 182 #define OUTPUT_FLAVOR bfd_target_coff_flavour
 183
 184 /* Alter the field names, for now, until we've fixed up the other
 185    references to use the new name.  */
 186 #ifdef TC_I960
 187 #define TC_SYMFIELD_TYPE        symbolS *
 188 #define sy_tc                   bal
 189 #endif
 190
 191 #define OBJ_SYMFIELD_TYPE       unsigned long
 192 #define sy_obj                  sy_flags
 193
 194 /* We can't use the predefined section symbols in bfd/section.c, as
 195    COFF symbols have extra fields.  See bfd/libcoff.h:coff_symbol_type.  */
 196 #ifndef obj_sec_sym_ok_for_reloc
 197 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 198 #endif
 199
 200 #define SYM_AUXENT(S) \
 201   (&coffsymbol (symbol_get_bfdsym (S))->native[1].u.auxent)
 202 #define SYM_AUXINFO(S) \
 203   (&coffsymbol (symbol_get_bfdsym (S))->native[1])
 204
 205 /* The number of auxiliary entries.  */
 206 #define S_GET_NUMBER_AUXILIARY(s) \
 207   (coffsymbol (symbol_get_bfdsym (s))->native->u.syment.n_numaux)
 208 /* The number of auxiliary entries.  */
 209 #define S_SET_NUMBER_AUXILIARY(s, v)    (S_GET_NUMBER_AUXILIARY (s) = (v))
 210
 211 /* True if a symbol name is in the string table, i.e. its length is > 8.  */
 212 #define S_IS_STRING(s)          (strlen (S_GET_NAME (s)) > 8 ? 1 : 0)
 213
 214 /* Auxiliary entry macros. SA_ stands for symbol auxiliary.  */
 215 /* Omit the tv related fields.  */
 216 /* Accessors.  */
 217
 218 #define SA_GET_SYM_TAGNDX(s)    (SYM_AUXENT (s)->x_sym.x_tagndx.l)
 219 #define SA_GET_SYM_LNNO(s)      (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno)
 220 #define SA_GET_SYM_SIZE(s)      (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size)
 221 #define SA_GET_SYM_FSIZE(s)     (SYM_AUXENT (s)->x_sym.x_misc.x_fsize)
 222 #define SA_GET_SYM_LNNOPTR(s)   (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr)
 223 #define SA_GET_SYM_ENDNDX(s)    (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_endndx)
 224 #define SA_GET_SYM_DIMEN(s,i)   (SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)])
 225 #define SA_GET_FILE_FNAME(s)    (SYM_AUXENT (s)->x_file.x_fname)
 226 #define SA_GET_SCN_SCNLEN(s)    (SYM_AUXENT (s)->x_scn.x_scnlen)
 227 #define SA_GET_SCN_NRELOC(s)    (SYM_AUXENT (s)->x_scn.x_nreloc)
 228 #define SA_GET_SCN_NLINNO(s)    (SYM_AUXENT (s)->x_scn.x_nlinno)
 229
 230 #define SA_SET_SYM_LNNO(s,v)    (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno = (v))
 231 #define SA_SET_SYM_SIZE(s,v)    (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size = (v))
 232 #define SA_SET_SYM_FSIZE(s,v)   (SYM_AUXENT (s)->x_sym.x_misc.x_fsize = (v))
 233 #define SA_SET_SYM_LNNOPTR(s,v) (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr = (v))
 234 #define SA_SET_SYM_DIMEN(s,i,v) (SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)] = (v))
 235 #define SA_SET_FILE_FNAME(s,v)  strncpy (SYM_AUXENT (s)->x_file.x_fname, (v), FILNMLEN)
 236 #define SA_SET_SCN_SCNLEN(s,v)  (SYM_AUXENT (s)->x_scn.x_scnlen = (v))
 237 #define SA_SET_SCN_NRELOC(s,v)  (SYM_AUXENT (s)->x_scn.x_nreloc = (v))
 238 #define SA_SET_SCN_NLINNO(s,v)  (SYM_AUXENT (s)->x_scn.x_nlinno = (v))
 239
 240 /* Internal use only definitions. SF_ stands for symbol flags.
 241
 242    These values can be assigned to sy_symbol.ost_flags field of a symbolS.
 243
 244    You'll break i960 if you shift the SYSPROC bits anywhere else.  for
 245    more on the balname/callname hack, see tc-i960.h.  b.out is done
 246    differently.  */
 247
 248 #define SF_I960_MASK    0x000001ff      /* Bits 0-8 are used by the i960 port.  */
 249 #define SF_SYSPROC      0x0000003f      /* bits 0-5 are used to store the sysproc number.  */
 250 #define SF_IS_SYSPROC   0x00000040      /* bit 6 marks symbols that are sysprocs.  */
 251 #define SF_BALNAME      0x00000080      /* bit 7 marks BALNAME symbols.  */
 252 #define SF_CALLNAME     0x00000100      /* bit 8 marks CALLNAME symbols.  */
 253
 254 #define SF_NORMAL_MASK  0x0000ffff      /* bits 12-15 are general purpose.  */
 255
 256 #define SF_STATICS      0x00001000      /* Mark the .text & all symbols.  */
 257 #define SF_DEFINED      0x00002000      /* Symbol is defined in this file.  */
 258 #define SF_STRING       0x00004000      /* Symbol name length > 8.  */
 259 #define SF_LOCAL        0x00008000      /* Symbol must not be emitted.  */
 260
 261 #define SF_DEBUG_MASK   0xffff0000      /* bits 16-31 are debug info.  */
 262
 263 #define SF_FUNCTION     0x00010000      /* The symbol is a function.  */
 264 #define SF_PROCESS      0x00020000      /* Process symbol before write.  */
 265 #define SF_TAGGED       0x00040000      /* Is associated with a tag.  */
 266 #define SF_TAG          0x00080000      /* Is a tag.  */
 267 #define SF_DEBUG        0x00100000      /* Is in debug or abs section.  */
 268 #define SF_GET_SEGMENT  0x00200000      /* Get the section of the forward symbol.  */
 269 /* All other bits are unused.  */
 270
 271 /* Accessors.  */
 272 #define SF_GET(s)               (* symbol_get_obj (s))
 273 #define SF_GET_DEBUG(s)         (symbol_get_bfdsym (s)->flags & BSF_DEBUGGING)
 274 #define SF_SET_DEBUG(s)         (symbol_get_bfdsym (s)->flags |= BSF_DEBUGGING)
 275 #define SF_GET_NORMAL_FIELD(s)  (SF_GET (s) & SF_NORMAL_MASK)
 276 #define SF_GET_DEBUG_FIELD(s)   (SF_GET (s) & SF_DEBUG_MASK)
 277 #define SF_GET_FILE(s)          (SF_GET (s) & SF_FILE)
 278 #define SF_GET_STATICS(s)       (SF_GET (s) & SF_STATICS)
 279 #define SF_GET_DEFINED(s)       (SF_GET (s) & SF_DEFINED)
 280 #define SF_GET_STRING(s)        (SF_GET (s) & SF_STRING)
 281 #define SF_GET_LOCAL(s)         (SF_GET (s) & SF_LOCAL)
 282 #define SF_GET_FUNCTION(s)      (SF_GET (s) & SF_FUNCTION)
 283 #define SF_GET_PROCESS(s)       (SF_GET (s) & SF_PROCESS)
 284 #define SF_GET_TAGGED(s)        (SF_GET (s) & SF_TAGGED)
 285 #define SF_GET_TAG(s)           (SF_GET (s) & SF_TAG)
 286 #define SF_GET_GET_SEGMENT(s)   (SF_GET (s) & SF_GET_SEGMENT)
 287 #define SF_GET_I960(s)          (SF_GET (s) & SF_I960_MASK)     /* Used by i960.  */
 288 #define SF_GET_BALNAME(s)       (SF_GET (s) & SF_BALNAME)       /* Used by i960.  */
 289 #define SF_GET_CALLNAME(s)      (SF_GET (s) & SF_CALLNAME)      /* Used by i960.  */
 290 #define SF_GET_IS_SYSPROC(s)    (SF_GET (s) & SF_IS_SYSPROC)    /* Used by i960.  */
 291 #define SF_GET_SYSPROC(s)       (SF_GET (s) & SF_SYSPROC)       /* Used by i960.  */
 292
 293 /* Modifiers.  */
 294 #define SF_SET(s,v)             (SF_GET (s) = (v))
 295 #define SF_SET_NORMAL_FIELD(s,v)(SF_GET (s) |= ((v) & SF_NORMAL_MASK))
 296 #define SF_SET_DEBUG_FIELD(s,v) (SF_GET (s) |= ((v) & SF_DEBUG_MASK))
 297 #define SF_SET_FILE(s)          (SF_GET (s) |= SF_FILE)
 298 #define SF_SET_STATICS(s)       (SF_GET (s) |= SF_STATICS)
 299 #define SF_SET_DEFINED(s)       (SF_GET (s) |= SF_DEFINED)
 300 #define SF_SET_STRING(s)        (SF_GET (s) |= SF_STRING)
 301 #define SF_SET_LOCAL(s)         (SF_GET (s) |= SF_LOCAL)
 302 #define SF_CLEAR_LOCAL(s)       (SF_GET (s) &= ~SF_LOCAL)
 303 #define SF_SET_FUNCTION(s)      (SF_GET (s) |= SF_FUNCTION)
 304 #define SF_SET_PROCESS(s)       (SF_GET (s) |= SF_PROCESS)
 305 #define SF_SET_TAGGED(s)        (SF_GET (s) |= SF_TAGGED)
 306 #define SF_SET_TAG(s)           (SF_GET (s) |= SF_TAG)
 307 #define SF_SET_GET_SEGMENT(s)   (SF_GET (s) |= SF_GET_SEGMENT)
 308 #define SF_SET_I960(s,v)        (SF_GET (s) |= ((v) & SF_I960_MASK))    /* Used by i960.  */
 309 #define SF_SET_BALNAME(s)       (SF_GET (s) |= SF_BALNAME)              /* Used by i960.  */
 310 #define SF_SET_CALLNAME(s)      (SF_GET (s) |= SF_CALLNAME)             /* Used by i960.  */
 311 #define SF_SET_IS_SYSPROC(s)    (SF_GET (s) |= SF_IS_SYSPROC)           /* Used by i960.  */
 312 #define SF_SET_SYSPROC(s,v)     (SF_GET (s) |= ((v) & SF_SYSPROC))      /* Used by i960.  */
 313
 314
 315 /*  Line number handling.  */
 316 extern int text_lineno_number;
 317 extern int coff_line_base;
 318 extern int coff_n_line_nos;
 319 extern symbolS *coff_last_function;
 320
 321 #define obj_emit_lineno(WHERE, LINE, FILE_START)        abort ()
 322 #define obj_app_file(name, app)      c_dot_file_symbol (name, app)
 323 #define obj_frob_symbol(S,P)         coff_frob_symbol (S, & P)
 324 #define obj_frob_section(S)          coff_frob_section (S)
 325 #define obj_frob_file_after_relocs() coff_frob_file_after_relocs ()
 326 #ifndef obj_adjust_symtab
 327 #define obj_adjust_symtab()          coff_adjust_symtab ()
 328 #endif
 329
 330 /* Forward the segment of a forwarded symbol, handle assignments that
 331    just copy symbol values, etc.  */
 332 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
 333 #ifndef TE_I386AIX
 334 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
 335   (SF_GET_GET_SEGMENT (dest) \
 336    ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
 337    : 0)
 338 #else
 339 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
 340   (SF_GET_GET_SEGMENT (dest) && S_GET_SEGMENT (dest) == SEG_UNKNOWN \
 341    ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
 342    : 0)
 343 #endif
 344 #endif
 345
 346 /* Sanity check.  */
 347
 348 #ifdef TC_I960
 349 #ifndef C_LEAFSTAT
 350 hey ! Where is the C_LEAFSTAT definition ? i960 - coff support is depending on it.
 351 #endif /* no C_LEAFSTAT */
 352 #endif /* TC_I960 */
 353
 354 extern const pseudo_typeS coff_pseudo_table[];
 355
 356 #ifndef obj_pop_insert
 357 #define obj_pop_insert() pop_insert (coff_pseudo_table)
 358 #endif
 359
 360 /* In COFF, if a symbol is defined using .def/.val SYM/.endef, it's OK
 361    to redefine the symbol later on.  This can happen if C symbols use
 362    a prefix, and a symbol is defined both with and without the prefix,
 363    as in start/_start/__start in gcc/libgcc1-test.c.  */
 364 #define RESOLVE_SYMBOL_REDEFINITION(sym)                \
 365 (SF_GET_GET_SEGMENT (sym)                               \
 366  ? (sym->sy_frag = frag_now,                            \
 367     S_SET_VALUE (sym, frag_now_fix ()),                 \
 368     S_SET_SEGMENT (sym, now_seg),                       \
 369     0)                                                  \
 370  : 0)
 371
 372 /* Stabs in a coff file go into their own section.  */
 373 #define SEPARATE_STAB_SECTIONS 1
 374
 375 /* We need 12 bytes at the start of the section to hold some initial
 376    information.  */
 377 #define INIT_STAB_SECTION(seg) obj_coff_init_stab_section (seg)
 378
 379 /* Store the number of relocations in the section aux entry.  */
 380 #define SET_SECTION_RELOCS(sec, relocs, n) \
 381   SA_SET_SCN_NRELOC (section_symbol (sec), n)
 382
 383 #define obj_app_file(name, app) c_dot_file_symbol (name, app)
 384
 385 extern int  S_SET_DATA_TYPE              (symbolS *, int);
 386 extern int  S_SET_STORAGE_CLASS          (symbolS *, int);
 387 extern int  S_GET_STORAGE_CLASS          (symbolS *);
 388 extern void SA_SET_SYM_ENDNDX            (symbolS *, symbolS *);
 389 extern void coff_add_linesym             (symbolS *);
 390 extern void c_dot_file_symbol            (const char *, int);
 391 extern void coff_frob_symbol             (symbolS *, int *);
 392 extern void coff_adjust_symtab           (void);
 393 extern void coff_frob_section            (segT);
 394 extern void coff_adjust_section_syms     (bfd *, asection *, void *);
 395 extern void coff_frob_file_after_relocs  (void);
 396 extern void coff_obj_symbol_new_hook     (symbolS *);
 397 extern void coff_obj_symbol_clone_hook   (symbolS *, symbolS *);
 398 extern void coff_obj_read_begin_hook     (void);
 399 #ifdef TE_PE
 400 extern void pecoff_obj_set_weak_hook     (symbolS *);
 401 extern void pecoff_obj_clear_weak_hook   (symbolS *);
 402 #endif
 403 extern void obj_coff_section             (int);
 404 extern segT obj_coff_add_segment         (const char *);
 405 extern void obj_coff_section             (int);
 406 extern void c_dot_file_symbol            (const char *, int);
 407 extern segT s_get_segment                (symbolS *);
 408 #ifndef tc_coff_symbol_emit_hook
 409 extern void tc_coff_symbol_emit_hook     (symbolS *);
 410 #endif
 411 extern void obj_coff_pe_handle_link_once (void);
 412 extern void obj_coff_init_stab_section   (segT);
 413 extern void c_section_header             (struct internal_scnhdr *,
 414                                           char *, long, long, long, long,
 415                                           long, long, long, long);
 416 extern void obj_coff_seh_do_final (void);
 417
 418 #ifndef obj_coff_generate_pdata
 419 #define obj_coff_generate_pdata obj_coff_seh_do_final
 420 #endif
 421
 422
 423 #endif /* OBJ_FORMAT_H */