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-rw-r--r--binutils/coffgrok.c728
1 files changed, 728 insertions, 0 deletions
diff --git a/binutils/coffgrok.c b/binutils/coffgrok.c
new file mode 100644
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--- /dev/null
+++ b/binutils/coffgrok.c
@@ -0,0 +1,728 @@
+
+
+/* coffgrok.c
+
+ Copyright (C) 1994 Free Software Foundation, Inc.
+
+This file is part of GNU Binutils.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* Written by Steve Chamberlain (sac@cygnus.com)
+
+ This module reads a coff file and builds a really simple type tree
+ which can be read by other programs. The first application is a
+ coff->sysroff converter. It can be tested with coffdump.c.
+
+*/
+
+#include <bfd.h>
+#include <stdio.h>
+
+#include "coff/internal.h"
+#include "../bfd/libcoff.h"
+#include "coffgrok.h"
+int lofile = 1;
+static struct coff_scope *top_scope;
+static struct coff_scope *file_scope;
+static struct coff_ofile *ofile;
+
+struct coff_symbol *last_function_symbol;
+struct coff_type *last_function_type;
+struct coff_type *last_struct;
+struct coff_type *last_enum;
+struct coff_sfile *cur_sfile;
+
+static struct coff_symbol **tindex;
+
+
+static asymbol **syms;
+static long symcount;
+
+#define N(x) ((x)->_n._n_nptr[1])
+
+static struct coff_ptr_struct *rawsyms;
+static int rawcount;
+static bfd *abfd;
+extern char *xcalloc ();
+extern char *xmalloc ();
+#define PTR_SIZE 4
+#define SHORT_SIZE 2
+#define INT_SIZE 4
+#define LONG_SIZE 4
+#define FLOAT_SIZE 4
+#define DOUBLE_SIZE 8
+
+#define INDEXOF(p) ((struct coff_ptr_struct *)(p)-(rawsyms))
+
+static struct coff_scope *
+empty_scope ()
+{
+ struct coff_scope *l;
+ l = (struct coff_scope *) (xcalloc (sizeof (struct coff_scope), 1));
+ return l;
+}
+
+static struct coff_symbol *
+empty_symbol ()
+{
+ return (struct coff_symbol *) (xcalloc (sizeof (struct coff_symbol), 1));
+}
+
+/*int l;*/
+static void
+push_scope (link)
+{
+ struct coff_scope *n = empty_scope ();
+ if (link)
+ {
+ if (top_scope)
+ {
+ if (top_scope->list_tail)
+ {
+ top_scope->list_tail->next = n;
+ }
+ else
+ {
+ top_scope->list_head = n;
+ }
+ top_scope->list_tail = n;
+ }
+ }
+ n->parent = top_scope;
+
+ top_scope = n;
+}
+
+static void
+pop_scope ()
+{
+ top_scope = top_scope->parent;
+}
+
+static void
+do_sections_p1 (head)
+ struct coff_ofile *head;
+{
+ asection *section;
+ int idx;
+ struct coff_section *all = (struct coff_section *) (xcalloc (abfd->section_count + 1,
+ sizeof (struct coff_section)));
+ head->nsections = abfd->section_count + 1;
+ head->sections = all;
+
+ for (idx = 0, section = abfd->sections; section; section = section->next, idx++)
+ {
+ long relsize;
+ int i = section->target_index;
+ arelent **relpp;
+ long relcount;
+
+ relsize = bfd_get_reloc_upper_bound (abfd, section);
+ if (relsize < 0)
+ bfd_fatal (bfd_get_filename (abfd));
+ relpp = (arelent **) xmalloc (relsize);
+ relcount = bfd_canonicalize_reloc (abfd, section, relpp, syms);
+ if (relcount < 0)
+ bfd_fatal (bfd_get_filename (abfd));
+
+ head->sections[i].name = (char *) (section->name);
+ head->sections[i].code = section->flags & SEC_CODE;
+ head->sections[i].data = section->flags & SEC_DATA;
+ if (strcmp (section->name, ".bss") == 0)
+ head->sections[i].data = 1;
+ head->sections[i].address = section->vma;
+ head->sections[i].size = section->_raw_size;
+ head->sections[i].number = idx;
+ head->sections[i].nrelocs = section->reloc_count;
+ head->sections[i].relocs =
+ (struct coff_reloc *) (xcalloc (section->reloc_count,
+ sizeof (struct coff_reloc)));
+ head->sections[i].bfd_section = section;
+ }
+ head->sections[0].name = "ABSOLUTE";
+ head->sections[0].code = 0;
+ head->sections[0].data = 0;
+ head->sections[0].address = 0;
+ head->sections[0].size = 0;
+ head->sections[0].number = 0;
+}
+
+static void
+do_sections_p2 (head)
+ struct coff_ofile *head;
+{
+ asection *section;
+ for (section = abfd->sections; section; section = section->next)
+ {
+ int j;
+ for (j = 0; j < section->reloc_count; j++)
+ {
+ int idx;
+ int i = section->target_index;
+ struct coff_reloc *r = head->sections[i].relocs + j;
+ arelent *sr = section->relocation + j;
+ r->offset = sr->address;
+ r->addend = sr->addend;
+ idx = ((coff_symbol_type *) (sr->sym_ptr_ptr[0]))->native - rawsyms;
+ r->symbol = tindex[idx];
+ }
+ }
+}
+
+static struct coff_where *
+do_where (i)
+ int i;
+{
+ struct internal_syment *sym = &rawsyms[i].u.syment;
+ struct coff_where *where
+ = (struct coff_where *) (malloc (sizeof (struct coff_where)));
+ where->offset = sym->n_value;
+
+ if (sym->n_scnum == -1)
+ sym->n_scnum = 0;
+
+ switch (sym->n_sclass)
+ {
+ case C_FIELD:
+ where->where = coff_where_member_of_struct;
+ where->offset = sym->n_value / 8;
+ where->bitoffset = sym->n_value % 8;
+ where->bitsize = rawsyms[i + 1].u.auxent.x_sym.x_misc.x_lnsz.x_size;
+ break;
+ case C_MOE:
+ where->where = coff_where_member_of_enum;
+ break;
+ case C_MOS:
+ case C_MOU:
+ where->where = coff_where_member_of_struct;
+ break;
+ case C_AUTO:
+ case C_ARG:
+ where->where = coff_where_stack;
+ break;
+ case C_EXT:
+ case C_STAT:
+ case C_EXTDEF:
+ case C_LABEL:
+ where->where = coff_where_memory;
+ where->section = &ofile->sections[sym->n_scnum];
+ break;
+ case C_REG:
+ case C_REGPARM:
+ where->where = coff_where_register;
+ break;
+ case C_ENTAG:
+ where->where = coff_where_entag;
+ break;
+ case C_STRTAG:
+ case C_UNTAG:
+ where->where = coff_where_strtag;
+ break;
+ case C_TPDEF:
+ where->where = coff_where_typedef;
+ break;
+ default:
+ abort ();
+ break;
+ }
+ return where;
+}
+
+static
+struct coff_line *
+do_lines (i, name)
+ int i;
+ char *name;
+{
+ struct coff_line *res = (struct coff_line *) xcalloc (sizeof (struct coff_line), 1);
+ asection *s;
+ int l;
+ /* Find out if this function has any line numbers in the table */
+ for (s = abfd->sections; s; s = s->next)
+ {
+ for (l = 0; l < s->lineno_count; l++)
+ {
+ if (s->lineno[l].line_number == 0)
+ {
+ if (rawsyms + i == ((coff_symbol_type *) (&(s->lineno[l].u.sym[0])))->native)
+ {
+ /* These lines are for this function - so count them and stick them on */
+ int c = 0;
+ /* Find the linenumber of the top of the function, since coff linenumbers
+ are relative to the start of the function. */
+ int start_line = rawsyms[i + 3].u.auxent.x_sym.x_misc.x_lnsz.x_lnno;
+
+ l++;
+ for (c = 0; s->lineno[l + c + 1].line_number; c++)
+ ;
+
+ /* Add two extra records, one for the prologue and one for the epilogue */
+ c += 1;
+ res->nlines = c;
+ res->lines = (int *) (xcalloc (sizeof (int), c));
+ res->addresses = (int *) (xcalloc (sizeof (int), c));
+ res->lines[0] = start_line;
+ res->addresses[0] = rawsyms[i].u.syment.n_value - s->vma;
+ for (c = 0; s->lineno[l + c + 1].line_number; c++)
+ {
+ res->lines[c + 1] = s->lineno[l + c].line_number + start_line - 1;
+ res->addresses[c + 1] = s->lineno[l + c].u.offset;
+ }
+ return res;
+ }
+ }
+ }
+ }
+ return res;
+}
+
+static
+struct coff_type *
+do_type (i)
+ int i;
+{
+ struct internal_syment *sym = &rawsyms[i].u.syment;
+ union internal_auxent *aux = &rawsyms[i + 1].u.auxent;
+ struct coff_type *res = (struct coff_type *) malloc (sizeof (struct coff_type));
+ int type = sym->n_type;
+ int which_dt = 0;
+
+ res->type = coff_basic_type;
+ res->u.basic = type & 0xf;
+
+ switch (type & 0xf)
+ {
+ case T_NULL:
+ case T_VOID:
+ if (sym->n_numaux && sym->n_sclass == C_STAT)
+ {
+ /* This is probably a section definition */
+ res->type = coff_secdef_type;
+ res->size = aux->x_scn.x_scnlen;
+ }
+ else
+ {
+ if (type == 0)
+ {
+ /* Don't know what this is, let's make it a simple int */
+ res->size = INT_SIZE;
+ res->u.basic = T_UINT;
+ }
+ else
+ {
+ /* Else it could be a function or pointer to void */
+ res->size = 0;
+ }
+ }
+ break;
+
+
+ break;
+ case T_UCHAR:
+ case T_CHAR:
+ res->size = 1;
+ break;
+ case T_USHORT:
+ case T_SHORT:
+ res->size = SHORT_SIZE;
+ break;
+ case T_UINT:
+ case T_INT:
+ res->size = INT_SIZE;
+ break;
+ case T_ULONG:
+ case T_LONG:
+ res->size = LONG_SIZE;
+ break;
+ case T_FLOAT:
+ res->size = FLOAT_SIZE;
+ break;
+ case T_DOUBLE:
+ res->size = DOUBLE_SIZE;
+ break;
+ case T_STRUCT:
+ case T_UNION:
+ if (sym->n_numaux)
+ {
+ if (aux->x_sym.x_tagndx.p)
+ {
+ /* Refering to a struct defined elsewhere */
+ res->type = coff_structref_type;
+ res->u.astructref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
+ res->size = res->u.astructref.ref ?
+ res->u.astructref.ref->type->size : 0;
+ }
+ else
+ {
+ /* A definition of a struct */
+ last_struct = res;
+ res->type = coff_structdef_type;
+ res->u.astructdef.elements = empty_scope ();
+ res->u.astructdef.isstruct = (type & 0xf) == T_STRUCT;
+ res->size = aux->x_sym.x_misc.x_lnsz.x_size;
+ }
+ }
+ else
+ {
+ /* No auxents - it's anonynmous */
+ res->type = coff_structref_type;
+ res->u.astructref.ref = 0;
+ res->size = 0;
+ }
+ break;
+ case T_ENUM:
+ if (aux->x_sym.x_tagndx.p)
+ {
+ /* Refering to a enum defined elsewhere */
+ res->type = coff_enumref_type;
+ res->u.aenumref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
+ res->size = res->u.aenumref.ref->type->size;
+ }
+ else
+ {
+ /* A definition of an enum */
+ last_enum = res;
+ res->type = coff_enumdef_type;
+ res->u.aenumdef.elements = empty_scope ();
+ res->size = aux->x_sym.x_misc.x_lnsz.x_size;
+ }
+ break;
+ case T_MOE:
+ break;
+ }
+
+ for (which_dt = 5; which_dt >= 0; which_dt--)
+ {
+ switch ((type >> ((which_dt * 2) + 4)) & 0x3)
+ {
+ case 0:
+ break;
+ case DT_ARY:
+ {
+
+ /* Look in the auxent for the dimensions and build lots of dims */
+ int els = aux->x_sym.x_fcnary.x_ary.x_dimen[which_dt];
+ if (els)
+ {
+ struct coff_type *ptr = (struct coff_type *) malloc (sizeof (struct coff_type));
+ ptr->type = coff_array_type;
+ ptr->size = els * res->size;
+ ptr->u.array.dim = els;
+ ptr->u.array.array_of = res;
+ res = ptr;
+ }
+ }
+
+ break;
+ case DT_PTR:
+ {
+ struct coff_type *ptr = (struct coff_type *) malloc (sizeof (struct coff_type));
+ ptr->size = PTR_SIZE;
+ ptr->type = coff_pointer_type;
+ ptr->u.pointer.points_to = res;
+ res = ptr;
+ break;
+ }
+ case DT_FCN:
+ {
+ struct coff_type *ptr = (struct coff_type *) malloc (sizeof (struct coff_type));
+ ptr->size = 0;
+ ptr->type = coff_function_type;
+ ptr->u.function.function_returns = res;
+ ptr->u.function.parameters = empty_scope ();
+ ptr->u.function.lines = do_lines (i, sym->_n._n_nptr[1]);
+ ptr->u.function.code = 0;
+ last_function_type = ptr;
+ res = ptr;
+ break;
+ }
+ }
+ }
+ return res;
+}
+
+static struct coff_visible *
+do_visible (i)
+ int i;
+{
+ struct internal_syment *sym = &rawsyms[i].u.syment;
+ struct coff_visible *visible = (struct coff_visible *) (malloc (sizeof (struct coff_visible)));
+ enum coff_vis_type t;
+ switch (sym->n_sclass)
+ {
+ case C_MOS:
+ case C_MOU:
+ case C_FIELD:
+ t = coff_vis_member_of_struct;
+ break;
+ case C_MOE:
+ t = coff_vis_member_of_enum;
+ break;
+
+ case C_REGPARM:
+ t = coff_vis_regparam;
+ break;
+
+ case C_REG:
+ t = coff_vis_register;
+ break;
+ case C_STRTAG:
+ case C_UNTAG:
+ case C_ENTAG:
+ case C_TPDEF:
+ t = coff_vis_tag;
+ break;
+ case C_AUTOARG:
+ case C_ARG:
+ t = coff_vis_autoparam;
+ break;
+ case C_AUTO:
+
+
+ t = coff_vis_auto;
+ break;
+ case C_LABEL:
+ case C_STAT:
+ t = coff_vis_int_def;
+ break;
+ case C_EXT:
+ if (sym->n_scnum == N_UNDEF)
+ {
+ if (sym->n_value)
+ t = coff_vis_common;
+ else
+ t = coff_vis_ext_ref;
+ }
+ else
+ t = coff_vis_ext_def;
+ break;
+ default:
+ abort ();
+ break;
+
+ }
+ visible->type = t;
+ return visible;
+}
+
+static int
+do_define (i, b)
+ int i;
+ struct coff_scope *b;
+{
+ static int symbol_index;
+ struct internal_syment *sym = &rawsyms[i].u.syment;
+
+ /* Define a symbol and attach to block b */
+ struct coff_symbol *s = empty_symbol ();
+
+ s->number = ++symbol_index;
+ s->name = sym->_n._n_nptr[1];
+ s->sfile = cur_sfile;
+ /* Glue onto the ofile list */
+ if (lofile >= 0)
+ {
+ if (ofile->symbol_list_tail)
+ ofile->symbol_list_tail->next_in_ofile_list = s;
+ else
+ ofile->symbol_list_head = s;
+ ofile->symbol_list_tail = s;
+ /* And the block list */
+ }
+ if (b->vars_tail)
+ b->vars_tail->next = s;
+ else
+ b->vars_head = s;
+
+ b->vars_tail = s;
+ b->nvars++;
+ s->type = do_type (i);
+ s->where = do_where (i);
+ s->visible = do_visible (i);
+
+ tindex[i] = s;
+
+ /* We remember the lowest address in each section for each source file */
+
+ if (s->where->where == coff_where_memory
+ && s->type->type == coff_secdef_type)
+ {
+ struct coff_isection *is = cur_sfile->section + s->where->section->number;
+
+ if (!is->init)
+ {
+ is->low = s->where->offset;
+ is->high = s->where->offset + s->type->size;
+ is->init = 1;
+ is->parent = s->where->section;
+ }
+
+ }
+
+ if (s->type->type == coff_function_type)
+ last_function_symbol = s;
+
+ return i + sym->n_numaux + 1;
+}
+
+
+static
+struct coff_ofile *
+doit ()
+{
+ int i;
+ int infile = 0;
+ struct coff_ofile *head = (struct coff_ofile *) malloc (sizeof (struct coff_ofile));
+ ofile = head;
+ head->source_head = 0;
+ head->source_tail = 0;
+
+ do_sections_p1 (head);
+ push_scope (1);
+
+ for (i = 0; i < rawcount;)
+ {
+ struct internal_syment *sym = &rawsyms[i].u.syment;
+ switch (sym->n_sclass)
+ {
+ case C_FILE:
+ {
+ /* new source file announced */
+ struct coff_sfile *n = (struct coff_sfile *) malloc (sizeof (struct coff_sfile));
+ n->section = (struct coff_isection *) xcalloc (sizeof (struct coff_isection), abfd->section_count + 1);
+ cur_sfile = n;
+ n->name = sym->_n._n_nptr[1];
+ n->next = 0;
+
+ if (infile)
+ {
+ pop_scope ();
+ }
+ infile = 1;
+ push_scope (1);
+ file_scope = n->scope = top_scope;
+
+ if (head->source_tail)
+ head->source_tail->next = n;
+ else
+ head->source_head = n;
+ head->source_tail = n;
+ head->nsources++;
+ i += sym->n_numaux + 1;
+ }
+ break;
+ case C_FCN:
+ {
+ char *name = sym->_n._n_nptr[1];
+ if (name[1] == 'b')
+ {
+ /* Function start */
+ push_scope (0);
+ last_function_type->u.function.code = top_scope;
+ top_scope->sec = ofile->sections + sym->n_scnum;
+ top_scope->offset = sym->n_value;
+ }
+ else
+ {
+ top_scope->size = sym->n_value - top_scope->offset + 1;
+ pop_scope ();
+
+ }
+ i += sym->n_numaux + 1;
+ }
+ break;
+
+ case C_BLOCK:
+ {
+ char *name = sym->_n._n_nptr[1];
+ if (name[1] == 'b')
+ {
+ /* Block start */
+ push_scope (1);
+ top_scope->sec = ofile->sections + sym->n_scnum;
+ top_scope->offset = sym->n_value;
+
+ }
+ else
+ {
+ top_scope->size = sym->n_value - top_scope->offset + 1;
+ pop_scope ();
+ }
+ i += sym->n_numaux + 1;
+ }
+ break;
+ case C_REGPARM:
+ case C_ARG:
+ i = do_define (i, last_function_symbol->type->u.function.parameters);
+ break;
+ case C_MOS:
+ case C_MOU:
+ case C_FIELD:
+ i = do_define (i, last_struct->u.astructdef.elements);
+ break;
+ case C_MOE:
+ i = do_define (i, last_enum->u.aenumdef.elements);
+ break;
+ case C_STRTAG:
+ case C_ENTAG:
+ case C_UNTAG:
+ /* Various definition */
+ i = do_define (i, top_scope);
+ break;
+ case C_EXT:
+ case C_LABEL:
+ i = do_define (i, file_scope);
+ break;
+ case C_STAT:
+ case C_TPDEF:
+ case C_AUTO:
+ case C_REG:
+ i = do_define (i, top_scope);
+ break;
+ default:
+ abort ();
+ case C_EOS:
+ i += sym->n_numaux + 1;
+ break;
+ }
+ }
+ do_sections_p2 (head);
+ return head;
+}
+
+struct coff_ofile *
+coff_grok (inabfd)
+ bfd *inabfd;
+{
+ long storage;
+ struct coff_ofile *p;
+ abfd = inabfd;
+ storage = bfd_get_symtab_upper_bound (abfd);
+
+ if (storage < 0)
+ bfd_fatal (abfd->filename);
+
+ syms = (asymbol **) xmalloc (storage);
+ symcount = bfd_canonicalize_symtab (abfd, syms);
+ if (symcount < 0)
+ bfd_fatal (abfd->filename);
+ rawsyms = obj_raw_syments (abfd);
+ rawcount = obj_raw_syment_count (abfd);;
+ tindex = (struct coff_symbol **) (xcalloc (sizeof (struct coff_symbol *), rawcount));
+
+ p = doit (abfd);
+ return p;
+}
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