uclibc-ng/libc/sysdeps/linux/powerpc/brk.S

/* brk system call for Linux/ppc.
   Copyright (C) 1995, 1996, 1997, 1999, 2000 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 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.

   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.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include "ppc_asm.h"
#define _ERRNO_H	1
#include <bits/errno.h>
#include <sys/syscall.h>

#ifdef __NR_brk
	.comm	___brk_addr,4,4
	.section ".text"
.globl      __brk;
.type      __brk, @function;
.align  2;

__brk:
	stwu    r1,-16(r1)
	stw	r3,8(r1)
	li 0, __NR_brk;   
	sc
	lwz     r6,8(r1)
#ifdef __PIC__
	mflr    r4
	bl      _GLOBAL_OFFSET_TABLE_@local-4
	mflr    r5
	lwz     r5,___brk_addr@got(r5)
	mtlr    r4
	stw     r3,0(r5)
#else
	lis     r4,___brk_addr@ha
	stw     r3,___brk_addr@l(r4)
#endif
	cmplw   r6,r3
	addi    r1,r1,16
	li	r3,0
	blelr+
	li      r3,ENOMEM
#ifdef __PIC__
	b	__syscall_error@plt
#else
	b	__syscall_error
#endif
.size __brk,.-__brk

.weak brk;
brk=__brk        
#endif