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03e187a41d
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>
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/* Invoke the early initialization function in libc.so.
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Copyright (C) 2020 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 <assert.h>
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#include <ldsodefs.h>
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#include <libc-early-init.h>
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#include <link.h>
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#include <stddef.h>
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void
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_dl_call_libc_early_init (struct link_map *libc_map, _Bool initial)
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{
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/* There is nothing to do if we did not actually load libc.so. */
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if (libc_map == NULL)
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return;
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const ElfW(Sym) *sym
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= _dl_lookup_direct (libc_map, "__libc_early_init",
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0x069682ac, /* dl_new_hash output. */
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"GLIBC_PRIVATE",
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0x0963cf85); /* _dl_elf_hash output. */
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assert (sym != NULL);
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__typeof (__libc_early_init) *early_init
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= DL_SYMBOL_ADDRESS (libc_map, sym);
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early_init (initial);
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}
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