mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-20 12:00:06 +00:00
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/* Copyright (C) 1991 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library 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, or (at your option)
|
|
any later version.
|
|
|
|
The GNU C Library 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 the GNU C Library; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <errno.h>
|
|
#include <a.out.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
|
|
/* Search the executable FILE for symbols matching those in NL,
|
|
which is terminated by an element with a NULL `n_un.n_name' member,
|
|
and fill in the elements of NL. */
|
|
int
|
|
DEFUN(nlist, (file, nl),
|
|
CONST char *file AND struct nlist *nl)
|
|
{
|
|
FILE *f;
|
|
struct exec header;
|
|
size_t nsymbols;
|
|
struct nlist *symbols;
|
|
unsigned long int string_table_size;
|
|
char *string_table;
|
|
register size_t i;
|
|
|
|
if (nl == NULL)
|
|
{
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
f = fopen(file, "r");
|
|
if (f == NULL)
|
|
return -1;
|
|
|
|
if (fread((PTR) &header, sizeof(header), 1, f) != 1)
|
|
goto lose;
|
|
|
|
if (fseek(f, N_SYMOFF(header), SEEK_SET) != 0)
|
|
goto lose;
|
|
|
|
symbols = (struct nlist *) __alloca(header.a_syms);
|
|
nsymbols = header.a_syms / sizeof(symbols[0]);
|
|
|
|
if (fread((PTR) symbols, sizeof(symbols[0]), nsymbols, f) != nsymbols)
|
|
goto lose;
|
|
|
|
if (fread((PTR) &string_table_size, sizeof(string_table_size), 1, f) != 1)
|
|
goto lose;
|
|
string_table_size -= sizeof(string_table_size);
|
|
|
|
string_table = (char *) __alloca(string_table_size);
|
|
if (fread((PTR) string_table, string_table_size, 1, f) != 1)
|
|
goto lose;
|
|
|
|
for (i = 0; i < nsymbols; ++i)
|
|
{
|
|
register struct nlist *nlp;
|
|
for (nlp = nl; nlp->n_un.n_name != NULL; ++nlp)
|
|
if (!strcmp(nlp->n_un.n_name,
|
|
&string_table[symbols[i].n_un.n_strx -
|
|
sizeof(string_table_size)]))
|
|
{
|
|
char *CONST name = nlp->n_un.n_name;
|
|
*nlp = symbols[i];
|
|
nlp->n_un.n_name = name;
|
|
}
|
|
}
|
|
|
|
(void) fclose(f);
|
|
return 0;
|
|
|
|
lose:;
|
|
(void) fclose(f);
|
|
return -1;
|
|
}
|