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e7570f4131
Change sbrk to fail for !__libc_initial (in the generic implementation). As a result, sbrk is (relatively) safe to use for the __libc_initial case (from the main libc). It is therefore no longer necessary to avoid using it in that case (or updating the brk cache), and the __libc_initial flag does not need to be updated as part of dlmopen or static dlopen. As before, direct brk system calls on Linux may lead to memory corruption. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* Early initialization of libc.so, libc.so side.
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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 <ctype.h>
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#include <libc-early-init.h>
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#include <libc-internal.h>
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#include <sys/single_threaded.h>
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#ifdef SHARED
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_Bool __libc_initial;
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#endif
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void
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__libc_early_init (_Bool initial)
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{
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/* Initialize ctype data. */
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__ctype_init ();
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/* Only the outer namespace is marked as single-threaded. */
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__libc_single_threaded = initial;
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#ifdef SHARED
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__libc_initial = initial;
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#endif
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}
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