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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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3
csu/libc-start.c
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@ -23,6 +23,7 @@
#include <exit-thread.h>
#include <libc-internal.h>
#include <elf/libc-early-init.h>
#include <stdbool.h>
#include <elf/dl-tunables.h>
@ -241,7 +242,7 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
#ifndef SHARED
/* Perform early initialization. In the shared case, this function
is called from the dynamic loader as early as possible. */
__libc_early_init ();
__libc_early_init (true);
/* Call the initializer of the libc. This is only needed here if we
are compiling for the static library in which case we haven't