mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 22:00:08 +00:00
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
|
/* brk system call for Linux/ARM.
|
||
|
|
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
|
||
|
|
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 Library General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 of the
|
||
|
|
License, or (at your option) any later version.
|
||
|
|
|
||
|
|
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
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
||
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
|
|
Boston, MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sysdep.h>
|
||
|
|
|
||
|
|
/* This must be initialized data because commons can't have aliases. */
|
||
|
|
void *__curbrk = 0;
|
||
|
|
|
||
|
|
int
|
||
|
|
__brk (void *addr)
|
||
|
|
{
|
||
|
|
void *newbrk;
|
||
|
|
|
||
|
|
asm ("mov a1, %1\n" /* save the argment in r0 */
|
||
|
|
"swi %2\n" /* do the system call */
|
||
|
|
"mov %0, a1;" /* keep the return value */
|
||
|
|
: "=r"(newbrk)
|
||
|
|
: "r"(addr), "i" (SYS_ify (brk))
|
||
|
|
: "a1");
|
||
|
|
|
||
|
|
__curbrk = newbrk;
|
||
|
|
|
||
|
|
if (newbrk < addr)
|
||
|
|
{
|
||
|
|
__set_errno (ENOMEM);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
weak_alias (__brk, brk)
|