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683158e0c4
(_hurd_set_brk): Try to allocate more space when we run out. * sysdeps/generic/sbrk.c: If __curbrk is zero, call __brk with zero and examine it again. * sysdeps/unix/sysv/linux/i386/brk.c: New file. * sysdeps/unix/sysv/linux/i386/brk.S: File removed. * sysdeps/unix/sysv/linux/i386/sbrk.S: File removed. * sysdeps/unix/sysv/linux/dl-sysdep.c: New file.
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* Dynamic linker system dependencies for Linux.
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Copyright (C) 1995 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/* Linux needs some special initialization, but otherwise uses
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the generic dynamic linker system interface code. */
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#include <unistd.h>
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#define DL_SYSDEP_INIT frob_brk ()
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static inline void
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frob_brk (void)
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{
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extern void _end;
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__brk (0); /* Initialize the break. */
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if (__sbrk (0) == &_end)
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{
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/* The dynamic linker was run as a program, and so the initial break
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starts just after our bss, at &_end. The malloc in dl-minimal.c
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will consume the rest of this page, so tell the kernel to move the
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break up that far. When the user program examines its break, it
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will see this new value and not clobber our data. */
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size_t pg = __getpagesize ();
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__sbrk (pg - ((&_end - (void *) 0) & pg));
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}
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}
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#include <sysdeps/generic/dl-sysdep.c>
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