56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
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#include AOUT_H
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#include <sys/types.h>
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SYMTAB *Snarf_Symbols (f, hp) FILE *f; struct header *hp; {
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SYMTAB *tab;
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register SYM *sp, **nextp;
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register n;
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struct symbol_dictionary_record r;
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tab = (SYMTAB *)Safe_Malloc (sizeof (SYMTAB));
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tab->first = 0;
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nextp = &tab->first;
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tab->strings = Safe_Malloc (hp->symbol_strings_size);
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(void)fseek (f, (long)hp->symbol_strings_location, SEEK_SET);
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if (fread (tab->strings, hp->symbol_strings_size, 1, f) != 1) {
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(void)fclose (f);
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Free_Symbols (tab);
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Primitive_Error ("corrupt string table in object file");
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}
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(void)fseek (f, (long)hp->symbol_location, SEEK_SET);
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for (n = hp->symbol_total; n > 0; n--) {
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if (fread ((char *)&r, sizeof r, 1, f) != 1) {
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(void)fclose (f);
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Free_Symbols (tab);
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Primitive_Error ("corrupt symbol table in object file");
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}
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if (r.symbol_type != ST_CODE)
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continue;
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if (r.symbol_scope != SS_UNIVERSAL)
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continue;
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sp = (SYM *)Safe_Malloc (sizeof (SYM));
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sp->name = tab->strings + r.name.n_strx;
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sp->value = r.symbol_value & ~3; /* mask out privilege level */
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*nextp = sp;
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nextp = &sp->next;
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*nextp = 0;
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}
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return tab;
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}
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SYMTAB *Open_File_And_Snarf_Symbols (name) char *name; {
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struct header hdr;
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FILE *f;
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SYMTAB *tab;
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if ((f = fopen (name, "r")) == NULL)
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Primitive_Error ("can't open a.out file");
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if (fread ((char *)&hdr, sizeof hdr, 1, f) != 1) {
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(void)fclose (f);
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Primitive_Error ("can't read a.out header");
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}
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tab = Snarf_Symbols (f, &hdr);
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(void)fclose (f);
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return tab;
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}
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