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5325233313
If glibc is configured with --disable-default-pie and build on
s390 with -O3, the tests elf/tst-audit25a and elf/tst-audit25b are
failing as there are additional la_symbind lines for free and malloc.
It turns out that those belong to the executable. In fact those are
the PLT-stubs. Furthermore la_symbind is also called for calloc and
realloc symbols, but those belong to libc.
Those functions are not called at all, but dlsym'ed in
elf/dl-minimal.c:
__rtld_malloc_init_real (struct link_map *main_map)
{
...
void *new_calloc = lookup_malloc_symbol (main_map, "calloc", &version);
void *new_free = lookup_malloc_symbol (main_map, "free", &version);
void *new_malloc = lookup_malloc_symbol (main_map, "malloc", &version);
void *new_realloc = lookup_malloc_symbol (main_map, "realloc", &version);
...
}
Therefore, this commit just ignored symbols with LA_SYMB_DLSYM flag.
Reviewed-by: Adheemrval Zanella <adhemerval.zanella@linaro.org>
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* Audit modules for tst-audit25a.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <link.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#define AUDIT25_COOKIE 0x1
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#define AUDIT25MOD1_COOKIE 0x2
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#define AUDIT25MOD2_COOKIE 0x3
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#define AUDIT25MOD3_COOKIE 0x2
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#define AUDIT25MOD4_COOKIE 0x3
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#define TEST_NAME "tst-audit25"
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#define TEST_MOD "tst-audit25"
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#define TEST_FUNC "tst_audit25"
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unsigned int
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la_version (unsigned int version)
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{
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return LAV_CURRENT;
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}
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unsigned int
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la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
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{
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const char *p = strrchr (map->l_name, '/');
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const char *l_name = p == NULL ? TEST_NAME : p + 1;
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uintptr_t ck = -1;
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if (strcmp (l_name, TEST_MOD "mod1.so") == 0)
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ck = AUDIT25MOD1_COOKIE;
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else if (strcmp (l_name, TEST_MOD "mod2.so") == 0)
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ck = AUDIT25MOD2_COOKIE;
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else if (strcmp (l_name, TEST_MOD "mod3.so") == 0)
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ck = AUDIT25MOD3_COOKIE;
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else if (strcmp (l_name, TEST_MOD "mod4.so") == 0)
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ck = AUDIT25MOD4_COOKIE;
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else if (strncmp (l_name, TEST_NAME, strlen (TEST_NAME)) == 0)
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ck = AUDIT25_COOKIE;
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*cookie = ck;
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return ck == -1 ? 0 : LA_FLG_BINDFROM | LA_FLG_BINDTO;
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}
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#if __ELF_NATIVE_CLASS == 64
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uintptr_t
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la_symbind64 (Elf64_Sym *sym, unsigned int ndx,
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uintptr_t *refcook, uintptr_t *defcook,
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unsigned int *flags, const char *symname)
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#else
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uintptr_t
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la_symbind32 (Elf32_Sym *sym, unsigned int ndx,
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uintptr_t *refcook, uintptr_t *defcook,
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unsigned int *flags, const char *symname)
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#endif
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{
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if (*refcook != -1 && *defcook != -1 && symname[0] != '\0'
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&& (*flags & LA_SYMB_DLSYM) == 0)
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fprintf (stderr, "la_symbind: %s %u\n", symname,
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*flags & (LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT) ? 1 : 0);
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return sym->st_value;
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}
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