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/* Dummy audit library for test-audit-threads.
Copyright (C) 2018-2021 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <elf.h>
#include <link.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
/* We must use a dummy LD_AUDIT module to force the dynamic loader to
*not* update the real PLT, and instead use a cached value for the
lazy resolution result. It is the update of that cached value that
we are testing for correctness by doing this. */
/* Library to be audited. */
#define LIB "tst-audit-threads-mod2.so"
/* CALLNUM is the number of retNum functions. */
#define CALLNUM 7999
#define CONCATX(a, b) __CONCAT (a, b)
static int previous = 0;
unsigned int
la_version (unsigned int ver)
{
return 1;
}
unsigned int
la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
{
return LA_FLG_BINDTO | LA_FLG_BINDFROM;
}
uintptr_t
CONCATX(la_symbind, __ELF_NATIVE_CLASS) (ElfW(Sym) *sym,
unsigned int ndx,
uintptr_t *refcook,
uintptr_t *defcook,
unsigned int *flags,
const char *symname)
{
const char * retnum = "retNum";
char * num = strstr (symname, retnum);
int n;
/* Validate if the symbols are getting called in the correct order.
This code is here to verify binutils does not optimize out the PLT
entries that require the symbol binding. */
if (num != NULL)
{
n = atoi (num);
assert (n >= previous);
assert (n <= CALLNUM);
previous = n;
}
return sym->st_value;
}
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