66 lines
1.4 KiB
ArmAsm
66 lines
1.4 KiB
ArmAsm
/* Copyright (C) 1992 Free Software Foundation, Inc.
|
|
Contributed by Brendan Kehoe (brendan@zen.org).
|
|
|
|
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., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
#ifndef SYS_brk
|
|
#define SYS_brk 17
|
|
#endif
|
|
|
|
#ifndef HAVE_GNU_LD
|
|
#define __end end
|
|
#endif
|
|
|
|
.data
|
|
.sdata
|
|
ENTRY(__curbrk)
|
|
.word __end
|
|
|
|
.text
|
|
.set noreorder
|
|
.set noat
|
|
|
|
ENTRY(__brk)
|
|
/* Minimum is one page. */
|
|
lui v0, 4096
|
|
lw v0, __end
|
|
nop
|
|
|
|
/* If they ask for less than a page, givvem the whole
|
|
thing anyway. */
|
|
sltu AT, a0, v0
|
|
beq AT, zero, down1
|
|
nop
|
|
move a0, v0
|
|
down1:
|
|
li v0, SYS_brk
|
|
syscall
|
|
bne a3, zero, error
|
|
|
|
/* Update __curbrk and exit cleanly. */
|
|
lui AT, 4096
|
|
sw a0, __curbrk
|
|
j ra
|
|
move v0, zero
|
|
|
|
/* What a horrible way to die. */
|
|
error: j syscall_error
|
|
nop
|
|
nop
|
|
nop
|