47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
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/* Change data segment. Linux generic version.
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Copyright (C) 2020-2022 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 <errno.h>
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#include <unistd.h>
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#include <sysdep.h>
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#include <brk_call.h>
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/* This must be initialized data because commons can't have aliases. */
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void *__curbrk = 0;
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#if HAVE_INTERNAL_BRK_ADDR_SYMBOL
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/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
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to work around different old braindamage in the old Linux ELF dynamic
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linker. */
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weak_alias (__curbrk, ___brk_addr)
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#endif
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int
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__brk (void *addr)
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{
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__curbrk = __brk_call (addr);
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if (__curbrk < addr)
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{
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__set_errno (ENOMEM);
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return -1;
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}
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return 0;
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}
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weak_alias (__brk, brk)
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