128 lines
4.0 KiB
C
128 lines
4.0 KiB
C
/* stab-hp9k300.c
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*
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* $Id$
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*
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* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
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* Copyright 2002, 2003 Sam Hocevar <sam@zoy.org>, Paris
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*
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* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
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* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
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* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
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* between TELES and Nixdorf Microprocessor Engineering, Berlin).
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*
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* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
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* owners or individual owners of copyright in this software, grant to any
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* person or company a worldwide, royalty free, license to
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*
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* i) copy this software,
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* ii) prepare derivative works based on this software,
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* iii) distribute copies of this software or derivative works,
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* iv) perform this software, or
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* v) display this software,
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*
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* provided that this notice is not removed and that neither Oliver Laumann
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* nor Teles nor Nixdorf are deemed to have made any representations as to
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* the suitability of this software for any purpose nor are held responsible
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* for any defects of this software.
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*
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* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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#include AOUT_H
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#include <sys/types.h>
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/* On the HP9000 an nlist entry contains a fixed length
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* part consisting of the symbol information, plus a variable
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* length part, the name without a '\0' terminator.
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* We don't know how much space to allocate for the names
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* until we have read them all.
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* The solution here is to save all the names on the fly
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* in a table that is grown in units of STRING_BLOCK bytes,
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* using realloc to expand it on demand.
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*/
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#define STRING_BLOCK 8192
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SYMTAB *Snarf_Symbols (FILE *f, struct exec *ep) {
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SYMTAB *tab;
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register SYM *sp;
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register SYM **nextp;
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int strsiz = 0; /* running total length of names read, */
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/* each '\0' terminated */
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int nread = 0; /* running total of bytes read from symbol table */
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int max = 0; /* current maximum size of name table */
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char *names = 0; /* the name table */
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struct nlist_ nl;
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tab = (SYMTAB *)Safe_Malloc (sizeof (SYMTAB));
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tab->first = 0;
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tab->strings = 0;
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nextp = &tab->first;
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(void)fseek (f, (long)LESYM_OFFSET(*ep), 0);
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while (nread < ep->a_lesyms) {
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if (fread ((char *)&nl, sizeof (nl), 1, f) != 1) {
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Free_Symbols (tab);
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(void)fclose (f);
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Primitive_Error ("corrupt symbol table in object file");
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}
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nread += sizeof (nl);
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if (nl.n_length == 0) {
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continue;
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}
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else if (nl.n_length + strsiz + 1 > max) {
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max += STRING_BLOCK;
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names = Safe_Realloc (names, max);
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}
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if (fread (names + strsiz, 1, nl.n_length, f) != nl.n_length) {
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Free_Symbols (tab);
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(void)fclose (f);
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Primitive_Error ("corrupt symbol table in object file");
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}
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else {
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nread += nl.n_length;
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names[ strsiz + nl.n_length ] = '\0';
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}
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if ((nl.n_type & N_TYPE) != N_TEXT) {
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strsiz += nl.n_length +1;
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continue;
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}
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sp = (SYM *)Safe_Malloc (sizeof (SYM));
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sp->name = (char *)strsiz;
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strsiz += (nl.n_length + 1);
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sp->value = nl.n_value;
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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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tab->strings = names;
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for (sp = tab->first; sp; sp = sp->next)
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sp->name += (unsigned int)names;
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return tab;
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}
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#ifdef INIT_OBJECTS
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SYMTAB *Open_File_And_Snarf_Symbols (char *name) {
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struct exec 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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#endif /* INIT_OBJECTS */
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