1 /* coff object file format
2    Copyright (C) 1989-2016 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