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      1 /* coff object file format
      2    Copyright (C) 1989-2014 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 #ifdef TE_PE
     45 #include "coff/powerpc.h"
     46 #else
     47 #include "coff/rs6000.h"
     48 #endif
     49 #endif
     50 
     51 #ifdef TC_SPARC
     52 #include "coff/sparc.h"
     53 #endif
     54 
     55 #ifdef TC_I386
     56 #ifdef TE_PEP
     57 #include "coff/x86_64.h"
     58 #else
     59 #include "coff/i386.h"
     60 #endif
     61 
     62 #ifndef TARGET_FORMAT
     63 #ifdef TE_PEP
     64 #define TARGET_FORMAT "coff-x86-64"
     65 #else
     66 #define TARGET_FORMAT "coff-i386"
     67 #endif
     68 #endif
     69 #endif
     70 
     71 #ifdef TC_M68K
     72 #include "coff/m68k.h"
     73 #ifndef TARGET_FORMAT
     74 #define TARGET_FORMAT "coff-m68k"
     75 #endif
     76 #endif
     77 
     78 #ifdef TC_I960
     79 #include "coff/i960.h"
     80 #define TARGET_FORMAT "coff-Intel-little"
     81 #endif
     82 
     83 #ifdef TC_Z80
     84 #include "coff/z80.h"
     85 #define TARGET_FORMAT "coff-z80"
     86 #endif
     87 
     88 #ifdef TC_Z8K
     89 #include "coff/z8k.h"
     90 #define TARGET_FORMAT "coff-z8k"
     91 #endif
     92 
     93 #ifdef TC_H8300
     94 #include "coff/h8300.h"
     95 #define TARGET_FORMAT "coff-h8300"
     96 #endif
     97 
     98 #ifdef TC_H8500
     99 #include "coff/h8500.h"
    100 #define TARGET_FORMAT "coff-h8500"
    101 #endif
    102 
    103 #ifdef TC_SH
    104 
    105 #ifdef TE_PE
    106 #define COFF_WITH_PE
    107 #endif
    108 
    109 #include "coff/sh.h"
    110 
    111 #ifdef TE_PE
    112 #define TARGET_FORMAT "pe-shl"
    113 #else
    114 
    115 #define TARGET_FORMAT					\
    116   (!target_big_endian					\
    117    ? (sh_small ? "coff-shl-small" : "coff-shl")		\
    118    : (sh_small ? "coff-sh-small" : "coff-sh"))
    119 
    120 #endif
    121 #endif
    122 
    123 #ifdef TC_MIPS
    124 #define COFF_WITH_PE
    125 #include "coff/mipspe.h"
    126 #undef  TARGET_FORMAT
    127 #define TARGET_FORMAT "pe-mips"
    128 #endif
    129 
    130 #ifdef TC_TIC30
    131 #include "coff/tic30.h"
    132 #define TARGET_FORMAT "coff-tic30"
    133 #endif
    134 
    135 #ifdef TC_TIC4X
    136 #include "coff/tic4x.h"
    137 #define TARGET_FORMAT "coff2-tic4x"
    138 #endif
    139 
    140 #ifdef TC_TIC54X
    141 #include "coff/tic54x.h"
    142 #define TARGET_FORMAT "coff1-c54x"
    143 #endif
    144 
    145 #ifdef TC_MCORE
    146 #include "coff/mcore.h"
    147 #ifndef TARGET_FORMAT
    148 #define TARGET_FORMAT "pe-mcore"
    149 #endif
    150 #endif
    151 
    152 #ifdef TE_PE
    153 #define obj_set_weak_hook pecoff_obj_set_weak_hook
    154 #define obj_clear_weak_hook pecoff_obj_clear_weak_hook
    155 #endif
    156 
    157 #ifndef OBJ_COFF_MAX_AUXENTRIES
    158 #define OBJ_COFF_MAX_AUXENTRIES 1
    159 #endif
    160 
    161 #define obj_symbol_new_hook coff_obj_symbol_new_hook
    162 #define obj_symbol_clone_hook coff_obj_symbol_clone_hook
    163 #define obj_read_begin_hook coff_obj_read_begin_hook
    164 
    165 #include "bfd/libcoff.h"
    166 
    167 #define OUTPUT_FLAVOR bfd_target_coff_flavour
    168 
    169 /* Alter the field names, for now, until we've fixed up the other
    170    references to use the new name.  */
    171 #ifdef TC_I960
    172 #define TC_SYMFIELD_TYPE	symbolS *
    173 #define sy_tc			bal
    174 #endif
    175 
    176 #define OBJ_SYMFIELD_TYPE	unsigned long
    177 #define sy_obj			sy_obj_flags
    178 
    179 /* We can't use the predefined section symbols in bfd/section.c, as
    180    COFF symbols have extra fields.  See bfd/libcoff.h:coff_symbol_type.  */
    181 #ifndef obj_sec_sym_ok_for_reloc
    182 #define obj_sec_sym_ok_for_reloc(SEC)	((SEC)->owner != 0)
    183 #endif
    184 
    185 #define SYM_AUXENT(S) \
    186   (&coffsymbol (symbol_get_bfdsym (S))->native[1].u.auxent)
    187 #define SYM_AUXINFO(S) \
    188   (&coffsymbol (symbol_get_bfdsym (S))->native[1])
    189 
    190 /* The number of auxiliary entries.  */
    191 #define S_GET_NUMBER_AUXILIARY(s) \
    192   (coffsymbol (symbol_get_bfdsym (s))->native->u.syment.n_numaux)
    193 /* The number of auxiliary entries.  */
    194 #define S_SET_NUMBER_AUXILIARY(s, v)	(S_GET_NUMBER_AUXILIARY (s) = (v))
    195 
    196 /* True if a symbol name is in the string table, i.e. its length is > 8.  */
    197 #define S_IS_STRING(s)		(strlen (S_GET_NAME (s)) > 8 ? 1 : 0)
    198 
    199 /* Auxiliary entry macros. SA_ stands for symbol auxiliary.  */
    200 /* Omit the tv related fields.  */
    201 /* Accessors.  */
    202 
    203 #define SA_GET_SYM_TAGNDX(s)	(SYM_AUXENT (s)->x_sym.x_tagndx.l)
    204 #define SA_GET_SYM_LNNO(s)	(SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno)
    205 #define SA_GET_SYM_SIZE(s)	(SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size)
    206 #define SA_GET_SYM_FSIZE(s)	(SYM_AUXENT (s)->x_sym.x_misc.x_fsize)
    207 #define SA_GET_SYM_LNNOPTR(s)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr)
    208 #define SA_GET_SYM_ENDNDX(s)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_endndx)
    209 #define SA_GET_SYM_DIMEN(s,i)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)])
    210 #define SA_GET_FILE_FNAME(s)	(SYM_AUXENT (s)->x_file.x_fname)
    211 #define SA_GET_SCN_SCNLEN(s)	(SYM_AUXENT (s)->x_scn.x_scnlen)
    212 #define SA_GET_SCN_NRELOC(s)	(SYM_AUXENT (s)->x_scn.x_nreloc)
    213 #define SA_GET_SCN_NLINNO(s)	(SYM_AUXENT (s)->x_scn.x_nlinno)
    214 
    215 #define SA_SET_SYM_LNNO(s,v)	(SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno = (v))
    216 #define SA_SET_SYM_SIZE(s,v)	(SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size = (v))
    217 #define SA_SET_SYM_FSIZE(s,v)	(SYM_AUXENT (s)->x_sym.x_misc.x_fsize = (v))
    218 #define SA_SET_SYM_LNNOPTR(s,v)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr = (v))
    219 #define SA_SET_SYM_DIMEN(s,i,v)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)] = (v))
    220 #define SA_SET_FILE_FNAME(s,v)	strncpy (SYM_AUXENT (s)->x_file.x_fname, (v), FILNMLEN)
    221 #define SA_SET_SCN_SCNLEN(s,v)	(SYM_AUXENT (s)->x_scn.x_scnlen = (v))
    222 #define SA_SET_SCN_NRELOC(s,v)	(SYM_AUXENT (s)->x_scn.x_nreloc = (v))
    223 #define SA_SET_SCN_NLINNO(s,v)	(SYM_AUXENT (s)->x_scn.x_nlinno = (v))
    224 
    225 /* Internal use only definitions. SF_ stands for symbol flags.
    226 
    227    These values can be assigned to sy_symbol.ost_flags field of a symbolS.
    228 
    229    You'll break i960 if you shift the SYSPROC bits anywhere else.  for
    230    more on the balname/callname hack, see tc-i960.h.  b.out is done
    231    differently.  */
    232 
    233 #define SF_I960_MASK	0x000001ff	/* Bits 0-8 are used by the i960 port.  */
    234 #define SF_SYSPROC	0x0000003f	/* bits 0-5 are used to store the sysproc number.  */
    235 #define SF_IS_SYSPROC	0x00000040	/* bit 6 marks symbols that are sysprocs.  */
    236 #define SF_BALNAME	0x00000080	/* bit 7 marks BALNAME symbols.  */
    237 #define SF_CALLNAME	0x00000100	/* bit 8 marks CALLNAME symbols.  */
    238 
    239 #define SF_NORMAL_MASK	0x0000ffff	/* bits 12-15 are general purpose.  */
    240 
    241 #define SF_STATICS	0x00001000	/* Mark the .text & all symbols.  */
    242 #define SF_DEFINED	0x00002000	/* Symbol is defined in this file.  */
    243 #define SF_STRING	0x00004000	/* Symbol name length > 8.  */
    244 #define SF_LOCAL	0x00008000	/* Symbol must not be emitted.  */
    245 
    246 #define SF_DEBUG_MASK	0xffff0000	/* bits 16-31 are debug info.  */
    247 
    248 #define SF_FUNCTION	0x00010000	/* The symbol is a function.  */
    249 #define SF_PROCESS	0x00020000	/* Process symbol before write.  */
    250 #define SF_TAGGED	0x00040000	/* Is associated with a tag.  */
    251 #define SF_TAG		0x00080000	/* Is a tag.  */
    252 #define SF_DEBUG	0x00100000	/* Is in debug or abs section.  */
    253 #define SF_GET_SEGMENT	0x00200000	/* Get the section of the forward symbol.  */
    254 /* All other bits are unused.  */
    255 
    256 /* Accessors.  */
    257 #define SF_GET(s)		(* symbol_get_obj (s))
    258 #define SF_GET_DEBUG(s)		(symbol_get_bfdsym (s)->flags & BSF_DEBUGGING)
    259 #define SF_SET_DEBUG(s)		(symbol_get_bfdsym (s)->flags |= BSF_DEBUGGING)
    260 #define SF_GET_NORMAL_FIELD(s)	(SF_GET (s) & SF_NORMAL_MASK)
    261 #define SF_GET_DEBUG_FIELD(s)	(SF_GET (s) & SF_DEBUG_MASK)
    262 #define SF_GET_FILE(s)		(SF_GET (s) & SF_FILE)
    263 #define SF_GET_STATICS(s)	(SF_GET (s) & SF_STATICS)
    264 #define SF_GET_DEFINED(s)	(SF_GET (s) & SF_DEFINED)
    265 #define SF_GET_STRING(s)	(SF_GET (s) & SF_STRING)
    266 #define SF_GET_LOCAL(s)		(SF_GET (s) & SF_LOCAL)
    267 #define SF_GET_FUNCTION(s)      (SF_GET (s) & SF_FUNCTION)
    268 #define SF_GET_PROCESS(s)	(SF_GET (s) & SF_PROCESS)
    269 #define SF_GET_TAGGED(s)	(SF_GET (s) & SF_TAGGED)
    270 #define SF_GET_TAG(s)		(SF_GET (s) & SF_TAG)
    271 #define SF_GET_GET_SEGMENT(s)	(SF_GET (s) & SF_GET_SEGMENT)
    272 #define SF_GET_I960(s)		(SF_GET (s) & SF_I960_MASK)	/* Used by i960.  */
    273 #define SF_GET_BALNAME(s)	(SF_GET (s) & SF_BALNAME)	/* Used by i960.  */
    274 #define SF_GET_CALLNAME(s)	(SF_GET (s) & SF_CALLNAME)	/* Used by i960.  */
    275 #define SF_GET_IS_SYSPROC(s)	(SF_GET (s) & SF_IS_SYSPROC)	/* Used by i960.  */
    276 #define SF_GET_SYSPROC(s)	(SF_GET (s) & SF_SYSPROC)	/* Used by i960.  */
    277 
    278 /* Modifiers.  */
    279 #define SF_SET(s,v)		(SF_GET (s) = (v))
    280 #define SF_SET_NORMAL_FIELD(s,v)(SF_GET (s) |= ((v) & SF_NORMAL_MASK))
    281 #define SF_SET_DEBUG_FIELD(s,v)	(SF_GET (s) |= ((v) & SF_DEBUG_MASK))
    282 #define SF_SET_FILE(s)		(SF_GET (s) |= SF_FILE)
    283 #define SF_SET_STATICS(s)	(SF_GET (s) |= SF_STATICS)
    284 #define SF_SET_DEFINED(s)	(SF_GET (s) |= SF_DEFINED)
    285 #define SF_SET_STRING(s)	(SF_GET (s) |= SF_STRING)
    286 #define SF_SET_LOCAL(s)		(SF_GET (s) |= SF_LOCAL)
    287 #define SF_CLEAR_LOCAL(s)	(SF_GET (s) &= ~SF_LOCAL)
    288 #define SF_SET_FUNCTION(s)      (SF_GET (s) |= SF_FUNCTION)
    289 #define SF_SET_PROCESS(s)	(SF_GET (s) |= SF_PROCESS)
    290 #define SF_SET_TAGGED(s)	(SF_GET (s) |= SF_TAGGED)
    291 #define SF_SET_TAG(s)		(SF_GET (s) |= SF_TAG)
    292 #define SF_SET_GET_SEGMENT(s)	(SF_GET (s) |= SF_GET_SEGMENT)
    293 #define SF_SET_I960(s,v)	(SF_GET (s) |= ((v) & SF_I960_MASK))	/* Used by i960.  */
    294 #define SF_SET_BALNAME(s)	(SF_GET (s) |= SF_BALNAME)		/* Used by i960.  */
    295 #define SF_SET_CALLNAME(s)	(SF_GET (s) |= SF_CALLNAME)		/* Used by i960.  */
    296 #define SF_SET_IS_SYSPROC(s)	(SF_GET (s) |= SF_IS_SYSPROC)		/* Used by i960.  */
    297 #define SF_SET_SYSPROC(s,v)	(SF_GET (s) |= ((v) & SF_SYSPROC))	/* Used by i960.  */
    298 
    299 
    300 /*  Line number handling.  */
    301 extern int text_lineno_number;
    302 extern int coff_line_base;
    303 extern int coff_n_line_nos;
    304 extern symbolS *coff_last_function;
    305 
    306 #define obj_emit_lineno(WHERE, LINE, FILE_START)	abort ()
    307 #define obj_app_file(name, app)      c_dot_file_symbol (name, app)
    308 #define obj_frob_symbol(S,P) 	     coff_frob_symbol (S, & P)
    309 #define obj_frob_section(S)	     coff_frob_section (S)
    310 #define obj_frob_file_after_relocs() coff_frob_file_after_relocs ()
    311 #ifndef obj_adjust_symtab
    312 #define obj_adjust_symtab()	     coff_adjust_symtab ()
    313 #endif
    314 
    315 /* Forward the segment of a forwarded symbol, handle assignments that
    316    just copy symbol values, etc.  */
    317 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
    318 #ifndef TE_I386AIX
    319 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
    320   (SF_GET_GET_SEGMENT (dest) \
    321    ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
    322    : 0)
    323 #else
    324 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
    325   (SF_GET_GET_SEGMENT (dest) && S_GET_SEGMENT (dest) == SEG_UNKNOWN \
    326    ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
    327    : 0)
    328 #endif
    329 #endif
    330 
    331 /* Sanity check.  */
    332 
    333 #ifdef TC_I960
    334 #ifndef C_LEAFSTAT
    335 hey ! Where is the C_LEAFSTAT definition ? i960 - coff support is depending on it.
    336 #endif /* no C_LEAFSTAT */
    337 #endif /* TC_I960 */
    338 
    339 extern const pseudo_typeS coff_pseudo_table[];
    340 
    341 #ifndef obj_pop_insert
    342 #define obj_pop_insert() pop_insert (coff_pseudo_table)
    343 #endif
    344 
    345 /* In COFF, if a symbol is defined using .def/.val SYM/.endef, it's OK
    346    to redefine the symbol later on.  This can happen if C symbols use
    347    a prefix, and a symbol is defined both with and without the prefix,
    348    as in start/_start/__start in gcc/libgcc1-test.c.  */
    349 #define RESOLVE_SYMBOL_REDEFINITION(sym)		\
    350 (SF_GET_GET_SEGMENT (sym)				\
    351  ? (sym->sy_frag = frag_now,				\
    352     S_SET_VALUE (sym, frag_now_fix ()),			\
    353     S_SET_SEGMENT (sym, now_seg),			\
    354     0)							\
    355  : 0)
    356 
    357 /* Stabs in a coff file go into their own section.  */
    358 #define SEPARATE_STAB_SECTIONS 1
    359 
    360 /* We need 12 bytes at the start of the section to hold some initial
    361    information.  */
    362 #define INIT_STAB_SECTION(seg) obj_coff_init_stab_section (seg)
    363 
    364 /* Store the number of relocations in the section aux entry.  */
    365 #define SET_SECTION_RELOCS(sec, relocs, n) \
    366   SA_SET_SCN_NRELOC (section_symbol (sec), n)
    367 
    368 #define obj_app_file(name, app) c_dot_file_symbol (name, app)
    369 
    370 extern int  S_SET_DATA_TYPE              (symbolS *, int);
    371 extern int  S_SET_STORAGE_CLASS          (symbolS *, int);
    372 extern int  S_GET_STORAGE_CLASS          (symbolS *);
    373 extern void SA_SET_SYM_ENDNDX            (symbolS *, symbolS *);
    374 extern void coff_add_linesym             (symbolS *);
    375 extern void c_dot_file_symbol            (const char *, int);
    376 extern void coff_frob_symbol             (symbolS *, int *);
    377 extern void coff_adjust_symtab           (void);
    378 extern void coff_frob_section            (segT);
    379 extern void coff_adjust_section_syms     (bfd *, asection *, void *);
    380 extern void coff_frob_file_after_relocs  (void);
    381 extern void coff_obj_symbol_new_hook     (symbolS *);
    382 extern void coff_obj_symbol_clone_hook   (symbolS *, symbolS *);
    383 extern void coff_obj_read_begin_hook     (void);
    384 #ifdef TE_PE
    385 extern void pecoff_obj_set_weak_hook     (symbolS *);
    386 extern void pecoff_obj_clear_weak_hook   (symbolS *);
    387 #endif
    388 extern void obj_coff_section             (int);
    389 extern segT obj_coff_add_segment         (const char *);
    390 extern void obj_coff_section             (int);
    391 extern void c_dot_file_symbol            (const char *, int);
    392 extern segT s_get_segment                (symbolS *);
    393 #ifndef tc_coff_symbol_emit_hook
    394 extern void tc_coff_symbol_emit_hook     (symbolS *);
    395 #endif
    396 extern void obj_coff_pe_handle_link_once (void);
    397 extern void obj_coff_init_stab_section   (segT);
    398 extern void c_section_header             (struct internal_scnhdr *,
    399 					  char *, long, long, long, long,
    400 					  long, long, long, long);
    401 extern void obj_coff_seh_do_final (void);
    402 
    403 #ifndef obj_coff_generate_pdata
    404 #define obj_coff_generate_pdata obj_coff_seh_do_final
    405 #endif
    406 
    407 
    408 #endif /* OBJ_FORMAT_H */
    409