glibc/sysdeps/unix/sysv/linux/i386/brk.c

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/* brk system call for Linux/i386.
Copyright (C) 1995-2016 Free Software Foundation, Inc.
update from main archive 961127 Thu Nov 28 03:11:11 1996 Ulrich Drepper <drepper@cygnus.com> * libio/fileops.c: Update from latest libg++. * sysdeps/unix/sysv/linux/init-first.c: Reformat copyright. * sysdeps/stub/libc-lock.h: Add __libc_lock_init_recursive. * libio/genops.c (_IO_init): Use __libc_lock_init_recursive instead of __libc_lock_init for streams. Reported by a sun <asun@zoology.washington.edu>. * sysdepsunix/sysv/linux/i386/brk.c: Reformat copyright. * sysdeps/generic/errno-loc.c: New file. Generic definition of __errno_location function. * sysdeps/unix/sysv/linux/i386/sysdep.S: Remove definition of __errno_location. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=csu]: Add errno-loc to sysdep-routines. * sysdeps/unix/sysv/linux/configure: Add test for linuxthreads and crypt add-on and warn if not available. Wed Nov 27 23:09:37 1996 Ulrich Drepper <drepper@cygnus.com> * po/ko.po: Update from Bang Jun-Young <bangjy@nownuri.nowcom.co.kr>. * sysdeps/unix/sysv/linux/syscalls.list: Remove _llseek. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=misc] (routines): Add llseek. * sysdeps/unix/sysv/linux/llseek.c: New file. Uses syscall. * sysdeps/unix/sysv/linux/i386/syscalls.list: Add __sys_llseek. * sysdeps/unix/sysv/linux/m68k/syscalls.list: Add __sys_llseek. Reported by HJ Lu <hjl@gnu.ai.mit.edu>. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add llseek. * sysdeps/unix/sysv/linux/alpha/llseek.S: Remove. Generic syscall is enough. Patch by Richard Henderson <rth@tamu.edu>. * sysdeps/unix/sysv/linux/alpha/sys/io.h: Add prototypes for pciconfig_read and pciconfig_write. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add new syscalls pciconfig_read and pciconfig_write. * login/getutent_r.c: Fix several bugs in last change.
1996-11-28 04:16:09 +00:00
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
update from main archive 961127 Thu Nov 28 03:11:11 1996 Ulrich Drepper <drepper@cygnus.com> * libio/fileops.c: Update from latest libg++. * sysdeps/unix/sysv/linux/init-first.c: Reformat copyright. * sysdeps/stub/libc-lock.h: Add __libc_lock_init_recursive. * libio/genops.c (_IO_init): Use __libc_lock_init_recursive instead of __libc_lock_init for streams. Reported by a sun <asun@zoology.washington.edu>. * sysdepsunix/sysv/linux/i386/brk.c: Reformat copyright. * sysdeps/generic/errno-loc.c: New file. Generic definition of __errno_location function. * sysdeps/unix/sysv/linux/i386/sysdep.S: Remove definition of __errno_location. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=csu]: Add errno-loc to sysdep-routines. * sysdeps/unix/sysv/linux/configure: Add test for linuxthreads and crypt add-on and warn if not available. Wed Nov 27 23:09:37 1996 Ulrich Drepper <drepper@cygnus.com> * po/ko.po: Update from Bang Jun-Young <bangjy@nownuri.nowcom.co.kr>. * sysdeps/unix/sysv/linux/syscalls.list: Remove _llseek. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=misc] (routines): Add llseek. * sysdeps/unix/sysv/linux/llseek.c: New file. Uses syscall. * sysdeps/unix/sysv/linux/i386/syscalls.list: Add __sys_llseek. * sysdeps/unix/sysv/linux/m68k/syscalls.list: Add __sys_llseek. Reported by HJ Lu <hjl@gnu.ai.mit.edu>. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add llseek. * sysdeps/unix/sysv/linux/alpha/llseek.S: Remove. Generic syscall is enough. Patch by Richard Henderson <rth@tamu.edu>. * sysdeps/unix/sysv/linux/alpha/sys/io.h: Add prototypes for pciconfig_read and pciconfig_write. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add new syscalls pciconfig_read and pciconfig_write. * login/getutent_r.c: Fix several bugs in last change.
1996-11-28 04:16:09 +00:00
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
update from main archive 961127 Thu Nov 28 03:11:11 1996 Ulrich Drepper <drepper@cygnus.com> * libio/fileops.c: Update from latest libg++. * sysdeps/unix/sysv/linux/init-first.c: Reformat copyright. * sysdeps/stub/libc-lock.h: Add __libc_lock_init_recursive. * libio/genops.c (_IO_init): Use __libc_lock_init_recursive instead of __libc_lock_init for streams. Reported by a sun <asun@zoology.washington.edu>. * sysdepsunix/sysv/linux/i386/brk.c: Reformat copyright. * sysdeps/generic/errno-loc.c: New file. Generic definition of __errno_location function. * sysdeps/unix/sysv/linux/i386/sysdep.S: Remove definition of __errno_location. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=csu]: Add errno-loc to sysdep-routines. * sysdeps/unix/sysv/linux/configure: Add test for linuxthreads and crypt add-on and warn if not available. Wed Nov 27 23:09:37 1996 Ulrich Drepper <drepper@cygnus.com> * po/ko.po: Update from Bang Jun-Young <bangjy@nownuri.nowcom.co.kr>. * sysdeps/unix/sysv/linux/syscalls.list: Remove _llseek. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=misc] (routines): Add llseek. * sysdeps/unix/sysv/linux/llseek.c: New file. Uses syscall. * sysdeps/unix/sysv/linux/i386/syscalls.list: Add __sys_llseek. * sysdeps/unix/sysv/linux/m68k/syscalls.list: Add __sys_llseek. Reported by HJ Lu <hjl@gnu.ai.mit.edu>. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add llseek. * sysdeps/unix/sysv/linux/alpha/llseek.S: Remove. Generic syscall is enough. Patch by Richard Henderson <rth@tamu.edu>. * sysdeps/unix/sysv/linux/alpha/sys/io.h: Add prototypes for pciconfig_read and pciconfig_write. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add new syscalls pciconfig_read and pciconfig_write. * login/getutent_r.c: Fix several bugs in last change.
1996-11-28 04:16:09 +00:00
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
/* This must be initialized data because commons can't have aliases. */
void *__curbrk = 0;
/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
to work around different old braindamage in the old Linux ELF dynamic
linker. */
weak_alias (__curbrk, ___brk_addr)
int
__brk (void *addr)
{
INTERNAL_SYSCALL_DECL (err);
void *newbrk = (void *) INTERNAL_SYSCALL (brk, err, 1, addr);
__curbrk = newbrk;
if (newbrk < addr)
return INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOMEM);
return 0;
}
weak_alias (__brk, brk)