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S390: Fix elf/tst-audit25[ab]

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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>
This commit is contained in:
Stefan Liebler 2022-04-07 13:59:48 +02:00
parent 4f2146c4f4
commit 5325233313
1 changed files with 2 additions and 1 deletions
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3
elf/tst-auditmod25.c
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@ -72,7 +72,8 @@ la_symbind32 (Elf32_Sym *sym, unsigned int ndx,
unsigned int *flags, const char *symname)
#endif
{
if (*refcook != -1 && *defcook != -1 && symname[0] != '\0')
if (*refcook != -1 && *defcook != -1 && symname[0] != '\0'
&& (*flags & LA_SYMB_DLSYM) == 0)
fprintf (stderr, "la_symbind: %s %u\n", symname,
*flags & (LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT) ? 1 : 0);
return sym->st_value;