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elf: Add initial flag argument to __libc_early_init

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The rseq initialization should happen only for the libc in the base
namespace (in the dynamic case) or the statically linked libc.  The
__libc_multiple_libcs flag does not quite cover this case at present,
so this commit introduces a flag argument to __libc_early_init,
indicating whether the libc being libc is the primary one (of the main
program).

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
2020-04-29 15:44:03 +02:00
parent 2ad5d0845d
commit 03e187a41d
6 changed files with 31 additions and 12 deletions
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6
elf/rtld.c
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@ -2373,8 +2373,10 @@ ERROR: '%s': cannot process note segment.\n", _dl_argv[0]);
rtld_timer_accum (&relocate_time, start);
}
/* Relocation is complete. Perform early libc initialization. */
_dl_call_libc_early_init (GL(dl_ns)[LM_ID_BASE].libc_map);
/* Relocation is complete. Perform early libc initialization. This
is the initial libc, even if audit modules have been loaded with
other libcs. */
_dl_call_libc_early_init (GL(dl_ns)[LM_ID_BASE].libc_map, true);
/* Do any necessary cleanups for the startup OS interface code.
We do these now so that no calls are made after rtld re-relocation