2 Copyright 1994, 1995, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005,
3 2007, 2009 Free Software Foundation, Inc.
5 This file is part of GNU Binutils.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
23 /* Written by Steve Chamberlain (sac@cygnus.com)
25 This module reads a coff file and builds a really simple type tree
26 which can be read by other programs. The first application is a
27 coff->sysroff converter. It can be tested with coffdump.c. */
31 #include "libiberty.h"
33 #include "coff/internal.h"
34 #include "../bfd/libcoff.h"
38 static int lofile = 1;
39 static struct coff_scope *top_scope;
40 static struct coff_scope *file_scope;
41 static struct coff_ofile *ofile;
43 static struct coff_symbol *last_function_symbol;
44 static struct coff_type *last_function_type;
45 static struct coff_type *last_struct;
46 static struct coff_type *last_enum;
47 static struct coff_sfile *cur_sfile;
49 static struct coff_symbol **tindex;
52 static asymbol **syms;
55 #define N(x) ((x)->_n._n_nptr[1])
57 static struct coff_ptr_struct *rawsyms;
68 #define INDEXOF(p) ((struct coff_ptr_struct *)(p)-(rawsyms))
70 static struct coff_scope *empty_scope (void);
71 static struct coff_symbol *empty_symbol (void);
72 static void push_scope (int);
73 static void pop_scope (void);
74 static void do_sections_p1 (struct coff_ofile *);
75 static void do_sections_p2 (struct coff_ofile *);
76 static struct coff_where *do_where (int);
77 static struct coff_line *do_lines (int, char *);
78 static struct coff_type *do_type (int);
79 static struct coff_visible *do_visible (int);
80 static int do_define (int, struct coff_scope *);
81 static struct coff_ofile *doit (void);
83 static struct coff_scope *
87 l = (struct coff_scope *) (xcalloc (sizeof (struct coff_scope), 1));
91 static struct coff_symbol *
94 return (struct coff_symbol *) (xcalloc (sizeof (struct coff_symbol), 1));
99 push_scope (int slink)
101 struct coff_scope *n = empty_scope ();
107 if (top_scope->list_tail)
109 top_scope->list_tail->next = n;
113 top_scope->list_head = n;
115 top_scope->list_tail = n;
118 n->parent = top_scope;
126 top_scope = top_scope->parent;
130 do_sections_p1 (struct coff_ofile *head)
134 struct coff_section *all = (struct coff_section *) (xcalloc (abfd->section_count + 1,
135 sizeof (struct coff_section)));
136 head->nsections = abfd->section_count + 1;
137 head->sections = all;
139 for (idx = 0, section = abfd->sections; section; section = section->next, idx++)
142 int i = section->target_index;
146 relsize = bfd_get_reloc_upper_bound (abfd, section);
148 bfd_fatal (bfd_get_filename (abfd));
151 relpp = (arelent **) xmalloc (relsize);
152 relcount = bfd_canonicalize_reloc (abfd, section, relpp, syms);
154 bfd_fatal (bfd_get_filename (abfd));
156 head->sections[i].name = (char *) (section->name);
157 head->sections[i].code = section->flags & SEC_CODE;
158 head->sections[i].data = section->flags & SEC_DATA;
159 if (strcmp (section->name, ".bss") == 0)
160 head->sections[i].data = 1;
161 head->sections[i].address = section->lma;
162 head->sections[i].size = bfd_get_section_size (section);
163 head->sections[i].number = idx;
164 head->sections[i].nrelocs = section->reloc_count;
165 head->sections[i].relocs =
166 (struct coff_reloc *) (xcalloc (section->reloc_count,
167 sizeof (struct coff_reloc)));
168 head->sections[i].bfd_section = section;
170 head->sections[0].name = "ABSOLUTE";
171 head->sections[0].code = 0;
172 head->sections[0].data = 0;
173 head->sections[0].address = 0;
174 head->sections[0].size = 0;
175 head->sections[0].number = 0;
179 do_sections_p2 (struct coff_ofile *head)
182 for (section = abfd->sections; section; section = section->next)
186 for (j = 0; j < section->reloc_count; j++)
189 int i = section->target_index;
190 struct coff_reloc *r = head->sections[i].relocs + j;
191 arelent *sr = section->relocation + j;
192 r->offset = sr->address;
193 r->addend = sr->addend;
194 idx = ((coff_symbol_type *) (sr->sym_ptr_ptr[0]))->native - rawsyms;
195 r->symbol = tindex[idx];
200 static struct coff_where *
203 struct internal_syment *sym = &rawsyms[i].u.syment;
204 struct coff_where *where =
205 (struct coff_where *) (xmalloc (sizeof (struct coff_where)));
206 where->offset = sym->n_value;
208 if (sym->n_scnum == -1)
211 switch (sym->n_sclass)
214 where->where = coff_where_member_of_struct;
215 where->offset = sym->n_value / 8;
216 where->bitoffset = sym->n_value % 8;
217 where->bitsize = rawsyms[i + 1].u.auxent.x_sym.x_misc.x_lnsz.x_size;
220 where->where = coff_where_member_of_enum;
224 where->where = coff_where_member_of_struct;
228 where->where = coff_where_stack;
234 where->where = coff_where_memory;
235 where->section = &ofile->sections[sym->n_scnum];
239 where->where = coff_where_register;
242 where->where = coff_where_entag;
246 where->where = coff_where_strtag;
249 where->where = coff_where_typedef;
260 do_lines (int i, char *name ATTRIBUTE_UNUSED)
262 struct coff_line *res = (struct coff_line *) xcalloc (sizeof (struct coff_line), 1);
266 /* Find out if this function has any line numbers in the table */
267 for (s = abfd->sections; s; s = s->next)
269 for (l = 0; l < s->lineno_count; l++)
271 if (s->lineno[l].line_number == 0)
273 if (rawsyms + i == ((coff_symbol_type *) (&(s->lineno[l].u.sym[0])))->native)
275 /* These lines are for this function - so count them and stick them on */
277 /* Find the linenumber of the top of the function, since coff linenumbers
278 are relative to the start of the function. */
279 int start_line = rawsyms[i + 3].u.auxent.x_sym.x_misc.x_lnsz.x_lnno;
282 for (c = 0; s->lineno[l + c + 1].line_number; c++)
285 /* Add two extra records, one for the prologue and one for the epilogue */
288 res->lines = (int *) (xcalloc (sizeof (int), c));
289 res->addresses = (int *) (xcalloc (sizeof (int), c));
290 res->lines[0] = start_line;
291 res->addresses[0] = rawsyms[i].u.syment.n_value - s->vma;
292 for (c = 0; s->lineno[l + c + 1].line_number; c++)
294 res->lines[c + 1] = s->lineno[l + c].line_number + start_line - 1;
295 res->addresses[c + 1] = s->lineno[l + c].u.offset;
309 struct internal_syment *sym = &rawsyms[i].u.syment;
310 union internal_auxent *aux = &rawsyms[i + 1].u.auxent;
311 struct coff_type *res =
312 (struct coff_type *) xmalloc (sizeof (struct coff_type));
313 int type = sym->n_type;
317 res->type = coff_basic_type;
318 res->u.basic = type & 0xf;
324 if (sym->n_numaux && sym->n_sclass == C_STAT)
326 /* This is probably a section definition */
327 res->type = coff_secdef_type;
328 res->size = aux->x_scn.x_scnlen;
334 /* Don't know what this is, let's make it a simple int */
335 res->size = INT_SIZE;
336 res->u.basic = T_UINT;
340 /* Else it could be a function or pointer to void */
354 res->size = SHORT_SIZE;
358 res->size = INT_SIZE;
362 res->size = LONG_SIZE;
365 res->size = FLOAT_SIZE;
368 res->size = DOUBLE_SIZE;
374 if (aux->x_sym.x_tagndx.p)
376 /* Referring to a struct defined elsewhere */
377 res->type = coff_structref_type;
378 res->u.astructref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
379 res->size = res->u.astructref.ref ?
380 res->u.astructref.ref->type->size : 0;
384 /* A definition of a struct */
386 res->type = coff_structdef_type;
387 res->u.astructdef.elements = empty_scope ();
388 res->u.astructdef.idx = 0;
389 res->u.astructdef.isstruct = (type & 0xf) == T_STRUCT;
390 res->size = aux->x_sym.x_misc.x_lnsz.x_size;
395 /* No auxents - it's anonymous */
396 res->type = coff_structref_type;
397 res->u.astructref.ref = 0;
402 if (aux->x_sym.x_tagndx.p)
404 /* Referring to a enum defined elsewhere */
405 res->type = coff_enumref_type;
406 res->u.aenumref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
407 res->size = res->u.aenumref.ref->type->size;
411 /* A definition of an enum */
413 res->type = coff_enumdef_type;
414 res->u.aenumdef.elements = empty_scope ();
415 res->size = aux->x_sym.x_misc.x_lnsz.x_size;
422 for (which_dt = 5; which_dt >= 0; which_dt--)
424 switch ((type >> ((which_dt * 2) + 4)) & 0x3)
430 struct coff_type *ptr = ((struct coff_type *)
431 xmalloc (sizeof (struct coff_type)));
432 int els = (dimind < DIMNUM
433 ? aux->x_sym.x_fcnary.x_ary.x_dimen[dimind]
436 ptr->type = coff_array_type;
437 ptr->size = els * res->size;
438 ptr->u.array.dim = els;
439 ptr->u.array.array_of = res;
445 struct coff_type *ptr =
446 (struct coff_type *) xmalloc (sizeof (struct coff_type));
447 ptr->size = PTR_SIZE;
448 ptr->type = coff_pointer_type;
449 ptr->u.pointer.points_to = res;
455 struct coff_type *ptr
456 = (struct coff_type *) xmalloc (sizeof (struct coff_type));
458 ptr->type = coff_function_type;
459 ptr->u.function.function_returns = res;
460 ptr->u.function.parameters = empty_scope ();
461 ptr->u.function.lines = do_lines (i, sym->_n._n_nptr[1]);
462 ptr->u.function.code = 0;
463 last_function_type = ptr;
472 static struct coff_visible *
475 struct internal_syment *sym = &rawsyms[i].u.syment;
476 struct coff_visible *visible =
477 (struct coff_visible *) (xmalloc (sizeof (struct coff_visible)));
478 enum coff_vis_type t;
479 switch (sym->n_sclass)
484 t = coff_vis_member_of_struct;
487 t = coff_vis_member_of_enum;
491 t = coff_vis_regparam;
495 t = coff_vis_register;
505 t = coff_vis_autoparam;
514 t = coff_vis_int_def;
517 if (sym->n_scnum == N_UNDEF)
522 t = coff_vis_ext_ref;
525 t = coff_vis_ext_def;
537 do_define (int i, struct coff_scope *b)
539 static int symbol_index;
540 struct internal_syment *sym = &rawsyms[i].u.syment;
542 /* Define a symbol and attach to block b */
543 struct coff_symbol *s = empty_symbol ();
545 s->number = ++symbol_index;
546 s->name = sym->_n._n_nptr[1];
547 s->sfile = cur_sfile;
548 /* Glue onto the ofile list */
551 if (ofile->symbol_list_tail)
552 ofile->symbol_list_tail->next_in_ofile_list = s;
554 ofile->symbol_list_head = s;
555 ofile->symbol_list_tail = s;
556 /* And the block list */
559 b->vars_tail->next = s;
565 s->type = do_type (i);
566 s->where = do_where (i);
567 s->visible = do_visible (i);
571 /* We remember the lowest address in each section for each source file */
573 if (s->where->where == coff_where_memory
574 && s->type->type == coff_secdef_type)
576 struct coff_isection *is = cur_sfile->section + s->where->section->number;
580 is->low = s->where->offset;
581 is->high = s->where->offset + s->type->size;
583 is->parent = s->where->section;
588 if (s->type->type == coff_function_type)
589 last_function_symbol = s;
591 return i + sym->n_numaux + 1;
601 struct coff_ofile *head =
602 (struct coff_ofile *) xmalloc (sizeof (struct coff_ofile));
604 head->source_head = 0;
605 head->source_tail = 0;
607 head->symbol_list_tail = 0;
608 head->symbol_list_head = 0;
609 do_sections_p1 (head);
612 for (i = 0; i < rawcount;)
614 struct internal_syment *sym = &rawsyms[i].u.syment;
615 switch (sym->n_sclass)
619 /* new source file announced */
620 struct coff_sfile *n =
621 (struct coff_sfile *) xmalloc (sizeof (struct coff_sfile));
622 n->section = (struct coff_isection *) xcalloc (sizeof (struct coff_isection), abfd->section_count + 1);
624 n->name = sym->_n._n_nptr[1];
633 file_scope = n->scope = top_scope;
635 if (head->source_tail)
636 head->source_tail->next = n;
638 head->source_head = n;
639 head->source_tail = n;
641 i += sym->n_numaux + 1;
646 char *name = sym->_n._n_nptr[1];
651 last_function_type->u.function.code = top_scope;
652 top_scope->sec = ofile->sections + sym->n_scnum;
653 top_scope->offset = sym->n_value;
657 top_scope->size = sym->n_value - top_scope->offset + 1;
661 i += sym->n_numaux + 1;
667 char *name = sym->_n._n_nptr[1];
672 top_scope->sec = ofile->sections + sym->n_scnum;
673 top_scope->offset = sym->n_value;
678 top_scope->size = sym->n_value - top_scope->offset + 1;
681 i += sym->n_numaux + 1;
686 i = do_define (i, last_function_symbol->type->u.function.parameters);
691 i = do_define (i, last_struct->u.astructdef.elements);
694 i = do_define (i, last_enum->u.aenumdef.elements);
699 /* Various definition */
700 i = do_define (i, top_scope);
704 i = do_define (i, file_scope);
710 i = do_define (i, top_scope);
715 i += sym->n_numaux + 1;
719 do_sections_p2 (head);
724 coff_grok (bfd *inabfd)
727 struct coff_ofile *p;
729 storage = bfd_get_symtab_upper_bound (abfd);
732 bfd_fatal (abfd->filename);
734 syms = (asymbol **) xmalloc (storage);
735 symcount = bfd_canonicalize_symtab (abfd, syms);
737 bfd_fatal (abfd->filename);
738 rawsyms = obj_raw_syments (abfd);
739 rawcount = obj_raw_syment_count (abfd);;
740 tindex = (struct coff_symbol **) (xcalloc (sizeof (struct coff_symbol *), rawcount));