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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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4
elf/dl-call-libc-early-init.c
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@ -23,7 +23,7 @@
#include <stddef.h>
void
_dl_call_libc_early_init (struct link_map *libc_map)
_dl_call_libc_early_init (struct link_map *libc_map, _Bool initial)
{
/* There is nothing to do if we did not actually load libc.so. */
if (libc_map == NULL)
@ -37,5 +37,5 @@ _dl_call_libc_early_init (struct link_map *libc_map)
assert (sym != NULL);
__typeof (__libc_early_init) *early_init
= DL_SYMBOL_ADDRESS (libc_map, sym);
early_init ();
early_init (initial);
}