5 Copyright (C) 1994 Free Software Foundation, Inc.
7 This file is part of GNU Binutils.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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.
34 #include "coff/internal.h"
35 #include "../bfd/libcoff.h"
38 static struct coff_scope *top_scope;
39 static struct coff_scope *file_scope;
40 static struct coff_ofile *ofile;
42 struct coff_symbol *last_function_symbol;
43 struct coff_type *last_function_type;
44 struct coff_type *last_struct;
45 struct coff_type *last_enum;
46 struct coff_sfile *cur_sfile;
48 static struct coff_symbol **tindex;
51 static asymbol **syms;
54 #define N(x) ((x)->_n._n_nptr[1])
56 static struct coff_ptr_struct *rawsyms;
59 extern char *xcalloc ();
60 extern char *xmalloc ();
68 #define INDEXOF(p) ((struct coff_ptr_struct *)(p)-(rawsyms))
70 static struct coff_scope *
74 l = (struct coff_scope *) (xcalloc (sizeof (struct coff_scope), 1));
78 static struct coff_symbol *
81 return (struct coff_symbol *) (xcalloc (sizeof (struct coff_symbol), 1));
88 struct coff_scope *n = empty_scope ();
93 if (top_scope->list_tail)
95 top_scope->list_tail->next = n;
99 top_scope->list_head = n;
101 top_scope->list_tail = n;
104 n->parent = top_scope;
112 top_scope = top_scope->parent;
116 do_sections_p1 (head)
117 struct coff_ofile *head;
121 struct coff_section *all = (struct coff_section *) (xcalloc (abfd->section_count + 1,
122 sizeof (struct coff_section)));
123 head->nsections = abfd->section_count + 1;
124 head->sections = all;
126 for (idx = 0, section = abfd->sections; section; section = section->next, idx++)
129 int i = section->target_index;
133 relsize = bfd_get_reloc_upper_bound (abfd, section);
135 bfd_fatal (bfd_get_filename (abfd));
136 relpp = (arelent **) xmalloc (relsize);
137 relcount = bfd_canonicalize_reloc (abfd, section, relpp, syms);
139 bfd_fatal (bfd_get_filename (abfd));
141 head->sections[i].name = (char *) (section->name);
142 head->sections[i].code = section->flags & SEC_CODE;
143 head->sections[i].data = section->flags & SEC_DATA;
144 if (strcmp (section->name, ".bss") == 0)
145 head->sections[i].data = 1;
146 head->sections[i].address = section->vma;
147 head->sections[i].size = section->_raw_size;
148 head->sections[i].number = idx;
149 head->sections[i].nrelocs = section->reloc_count;
150 head->sections[i].relocs =
151 (struct coff_reloc *) (xcalloc (section->reloc_count,
152 sizeof (struct coff_reloc)));
153 head->sections[i].bfd_section = section;
155 head->sections[0].name = "ABSOLUTE";
156 head->sections[0].code = 0;
157 head->sections[0].data = 0;
158 head->sections[0].address = 0;
159 head->sections[0].size = 0;
160 head->sections[0].number = 0;
164 do_sections_p2 (head)
165 struct coff_ofile *head;
168 for (section = abfd->sections; section; section = section->next)
171 for (j = 0; j < section->reloc_count; j++)
174 int i = section->target_index;
175 struct coff_reloc *r = head->sections[i].relocs + j;
176 arelent *sr = section->relocation + j;
177 r->offset = sr->address;
178 r->addend = sr->addend;
179 idx = ((coff_symbol_type *) (sr->sym_ptr_ptr[0]))->native - rawsyms;
180 r->symbol = tindex[idx];
185 static struct coff_where *
189 struct internal_syment *sym = &rawsyms[i].u.syment;
190 struct coff_where *where
191 = (struct coff_where *) (malloc (sizeof (struct coff_where)));
192 where->offset = sym->n_value;
194 if (sym->n_scnum == -1)
197 switch (sym->n_sclass)
200 where->where = coff_where_member_of_struct;
201 where->offset = sym->n_value / 8;
202 where->bitoffset = sym->n_value % 8;
203 where->bitsize = rawsyms[i + 1].u.auxent.x_sym.x_misc.x_lnsz.x_size;
206 where->where = coff_where_member_of_enum;
210 where->where = coff_where_member_of_struct;
214 where->where = coff_where_stack;
220 where->where = coff_where_memory;
221 where->section = &ofile->sections[sym->n_scnum];
225 where->where = coff_where_register;
228 where->where = coff_where_entag;
232 where->where = coff_where_strtag;
235 where->where = coff_where_typedef;
250 struct coff_line *res = (struct coff_line *) xcalloc (sizeof (struct coff_line), 1);
253 /* Find out if this function has any line numbers in the table */
254 for (s = abfd->sections; s; s = s->next)
256 for (l = 0; l < s->lineno_count; l++)
258 if (s->lineno[l].line_number == 0)
260 if (rawsyms + i == ((coff_symbol_type *) (&(s->lineno[l].u.sym[0])))->native)
262 /* These lines are for this function - so count them and stick them on */
264 /* Find the linenumber of the top of the function, since coff linenumbers
265 are relative to the start of the function. */
266 int start_line = rawsyms[i + 3].u.auxent.x_sym.x_misc.x_lnsz.x_lnno;
269 for (c = 0; s->lineno[l + c + 1].line_number; c++)
272 /* Add two extra records, one for the prologue and one for the epilogue */
275 res->lines = (int *) (xcalloc (sizeof (int), c));
276 res->addresses = (int *) (xcalloc (sizeof (int), c));
277 res->lines[0] = start_line;
278 res->addresses[0] = rawsyms[i].u.syment.n_value - s->vma;
279 for (c = 0; s->lineno[l + c + 1].line_number; c++)
281 res->lines[c + 1] = s->lineno[l + c].line_number + start_line - 1;
282 res->addresses[c + 1] = s->lineno[l + c].u.offset;
297 struct internal_syment *sym = &rawsyms[i].u.syment;
298 union internal_auxent *aux = &rawsyms[i + 1].u.auxent;
299 struct coff_type *res = (struct coff_type *) malloc (sizeof (struct coff_type));
300 int type = sym->n_type;
303 res->type = coff_basic_type;
304 res->u.basic = type & 0xf;
310 if (sym->n_numaux && sym->n_sclass == C_STAT)
312 /* This is probably a section definition */
313 res->type = coff_secdef_type;
314 res->size = aux->x_scn.x_scnlen;
320 /* Don't know what this is, let's make it a simple int */
321 res->size = INT_SIZE;
322 res->u.basic = T_UINT;
326 /* Else it could be a function or pointer to void */
340 res->size = SHORT_SIZE;
344 res->size = INT_SIZE;
348 res->size = LONG_SIZE;
351 res->size = FLOAT_SIZE;
354 res->size = DOUBLE_SIZE;
360 if (aux->x_sym.x_tagndx.p)
362 /* Refering to a struct defined elsewhere */
363 res->type = coff_structref_type;
364 res->u.astructref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
365 res->size = res->u.astructref.ref ?
366 res->u.astructref.ref->type->size : 0;
370 /* A definition of a struct */
372 res->type = coff_structdef_type;
373 res->u.astructdef.elements = empty_scope ();
374 res->u.astructdef.isstruct = (type & 0xf) == T_STRUCT;
375 res->size = aux->x_sym.x_misc.x_lnsz.x_size;
380 /* No auxents - it's anonynmous */
381 res->type = coff_structref_type;
382 res->u.astructref.ref = 0;
387 if (aux->x_sym.x_tagndx.p)
389 /* Refering to a enum defined elsewhere */
390 res->type = coff_enumref_type;
391 res->u.aenumref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
392 res->size = res->u.aenumref.ref->type->size;
396 /* A definition of an enum */
398 res->type = coff_enumdef_type;
399 res->u.aenumdef.elements = empty_scope ();
400 res->size = aux->x_sym.x_misc.x_lnsz.x_size;
407 for (which_dt = 5; which_dt >= 0; which_dt--)
409 switch ((type >> ((which_dt * 2) + 4)) & 0x3)
416 /* Look in the auxent for the dimensions and build lots of dims */
417 int els = aux->x_sym.x_fcnary.x_ary.x_dimen[which_dt];
420 struct coff_type *ptr = (struct coff_type *) malloc (sizeof (struct coff_type));
421 ptr->type = coff_array_type;
422 ptr->size = els * res->size;
423 ptr->u.array.dim = els;
424 ptr->u.array.array_of = res;
432 struct coff_type *ptr = (struct coff_type *) malloc (sizeof (struct coff_type));
433 ptr->size = PTR_SIZE;
434 ptr->type = coff_pointer_type;
435 ptr->u.pointer.points_to = res;
441 struct coff_type *ptr = (struct coff_type *) malloc (sizeof (struct coff_type));
443 ptr->type = coff_function_type;
444 ptr->u.function.function_returns = res;
445 ptr->u.function.parameters = empty_scope ();
446 ptr->u.function.lines = do_lines (i, sym->_n._n_nptr[1]);
447 ptr->u.function.code = 0;
448 last_function_type = ptr;
457 static struct coff_visible *
461 struct internal_syment *sym = &rawsyms[i].u.syment;
462 struct coff_visible *visible = (struct coff_visible *) (malloc (sizeof (struct coff_visible)));
463 enum coff_vis_type t;
464 switch (sym->n_sclass)
469 t = coff_vis_member_of_struct;
472 t = coff_vis_member_of_enum;
476 t = coff_vis_regparam;
480 t = coff_vis_register;
490 t = coff_vis_autoparam;
499 t = coff_vis_int_def;
502 if (sym->n_scnum == N_UNDEF)
507 t = coff_vis_ext_ref;
510 t = coff_vis_ext_def;
524 struct coff_scope *b;
526 static int symbol_index;
527 struct internal_syment *sym = &rawsyms[i].u.syment;
529 /* Define a symbol and attach to block b */
530 struct coff_symbol *s = empty_symbol ();
532 s->number = ++symbol_index;
533 s->name = sym->_n._n_nptr[1];
534 s->sfile = cur_sfile;
535 /* Glue onto the ofile list */
538 if (ofile->symbol_list_tail)
539 ofile->symbol_list_tail->next_in_ofile_list = s;
541 ofile->symbol_list_head = s;
542 ofile->symbol_list_tail = s;
543 /* And the block list */
546 b->vars_tail->next = s;
552 s->type = do_type (i);
553 s->where = do_where (i);
554 s->visible = do_visible (i);
558 /* We remember the lowest address in each section for each source file */
560 if (s->where->where == coff_where_memory
561 && s->type->type == coff_secdef_type)
563 struct coff_isection *is = cur_sfile->section + s->where->section->number;
567 is->low = s->where->offset;
568 is->high = s->where->offset + s->type->size;
570 is->parent = s->where->section;
575 if (s->type->type == coff_function_type)
576 last_function_symbol = s;
578 return i + sym->n_numaux + 1;
588 struct coff_ofile *head = (struct coff_ofile *) malloc (sizeof (struct coff_ofile));
590 head->source_head = 0;
591 head->source_tail = 0;
593 do_sections_p1 (head);
596 for (i = 0; i < rawcount;)
598 struct internal_syment *sym = &rawsyms[i].u.syment;
599 switch (sym->n_sclass)
603 /* new source file announced */
604 struct coff_sfile *n = (struct coff_sfile *) malloc (sizeof (struct coff_sfile));
605 n->section = (struct coff_isection *) xcalloc (sizeof (struct coff_isection), abfd->section_count + 1);
607 n->name = sym->_n._n_nptr[1];
616 file_scope = n->scope = top_scope;
618 if (head->source_tail)
619 head->source_tail->next = n;
621 head->source_head = n;
622 head->source_tail = n;
624 i += sym->n_numaux + 1;
629 char *name = sym->_n._n_nptr[1];
634 last_function_type->u.function.code = top_scope;
635 top_scope->sec = ofile->sections + sym->n_scnum;
636 top_scope->offset = sym->n_value;
640 top_scope->size = sym->n_value - top_scope->offset + 1;
644 i += sym->n_numaux + 1;
650 char *name = sym->_n._n_nptr[1];
655 top_scope->sec = ofile->sections + sym->n_scnum;
656 top_scope->offset = sym->n_value;
661 top_scope->size = sym->n_value - top_scope->offset + 1;
664 i += sym->n_numaux + 1;
669 i = do_define (i, last_function_symbol->type->u.function.parameters);
674 i = do_define (i, last_struct->u.astructdef.elements);
677 i = do_define (i, last_enum->u.aenumdef.elements);
682 /* Various definition */
683 i = do_define (i, top_scope);
687 i = do_define (i, file_scope);
693 i = do_define (i, top_scope);
698 i += sym->n_numaux + 1;
702 do_sections_p2 (head);
711 struct coff_ofile *p;
713 storage = bfd_get_symtab_upper_bound (abfd);
716 bfd_fatal (abfd->filename);
718 syms = (asymbol **) xmalloc (storage);
719 symcount = bfd_canonicalize_symtab (abfd, syms);
721 bfd_fatal (abfd->filename);
722 rawsyms = obj_raw_syments (abfd);
723 rawcount = obj_raw_syment_count (abfd);;
724 tindex = (struct coff_symbol **) (xcalloc (sizeof (struct coff_symbol *), rawcount));