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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>
58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
/* Internal prototype declarations that don't fit anywhere else.
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Copyright (C) 2000-2020 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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#ifndef _LIBC_INTERNAL
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# define _LIBC_INTERNAL 1
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#include <hp-timing.h>
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/* Initialize the `__libc_enable_secure' flag. */
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extern void __libc_init_secure (void);
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/* Discover the tick frequency of the machine if something goes wrong,
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we return 0, an impossible hertz. */
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extern int __profile_frequency (void);
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libc_hidden_proto (__profile_frequency)
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/* Hooks for the instrumenting functions. */
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extern void __cyg_profile_func_enter (void *this_fn, void *call_site);
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extern void __cyg_profile_func_exit (void *this_fn, void *call_site);
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/* Free all allocated resources. */
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extern void __libc_freeres (void);
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libc_hidden_proto (__libc_freeres)
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/* Free resources stored in thread-local variables on thread exit. */
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extern void __libc_thread_freeres (void);
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/* Define and initialize `__progname' et. al. */
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extern void __init_misc (int, char **, char **) attribute_hidden;
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# if IS_IN (rtld)
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extern __typeof (__profile_frequency) __profile_frequency attribute_hidden;
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# endif
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#ifdef SHARED
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/* True if this libc belongs to the initially loaded program (i.e., it
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is not for an audit module, not loaded via dlmopen, and not loaded
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via static dlopen either). */
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extern _Bool __libc_initial attribute_hidden;
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#endif
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#endif /* _LIBC_INTERNAL */
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