mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 20:51:11 +00:00
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/* Check DTAUDIT and vDSO interaction.
|
|
Copyright (C) 2021-2023 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 <link.h>
|
|
#include <inttypes.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <sys/auxv.h>
|
|
|
|
static inline bool
|
|
startswith (const char *str, const char *pre)
|
|
{
|
|
size_t lenpre = strlen (pre);
|
|
size_t lenstr = strlen (str);
|
|
return lenstr < lenpre ? false : memcmp (pre, str, lenpre) == 0;
|
|
}
|
|
|
|
unsigned int
|
|
la_version (unsigned int version)
|
|
{
|
|
return LAV_CURRENT;
|
|
}
|
|
|
|
unsigned int
|
|
la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
|
|
{
|
|
/* The linux-gate.so is placed at a fixed address, thus l_addr being 0,
|
|
and it might be the value reported as the AT_SYSINFO_EHDR. */
|
|
if (map->l_addr == 0 && startswith (map->l_name, "linux-gate.so"))
|
|
fprintf (stderr, "vdso found: %p\n", NULL);
|
|
else if (map->l_addr == getauxval (AT_SYSINFO_EHDR))
|
|
fprintf (stderr, "vdso found: %p\n", (void*) map->l_addr);
|
|
|
|
return 0;
|
|
}
|