79 lines
2.6 KiB
ArmAsm
79 lines
2.6 KiB
ArmAsm
|
/*-
|
||
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This code is derived from software contributed to Berkeley by
|
||
|
|
* the Systems Programming Group of the University of Utah Computer
|
||
|
|
* Science Department.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. All advertising materials mentioning features or use of this software
|
||
|
|
* must display the following acknowledgement:
|
||
|
|
* This product includes software developed by the University of
|
||
|
|
* California, Berkeley and its contributors.
|
||
|
|
* 4. Neither the name of the University nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
||
|
|
.text
|
||
|
|
/*.asciz "from: @(#)brk.s 5.1 (Berkeley) 5/12/90"*/
|
||
|
|
.asciz "$Id: brk.S,v 1.1 1993/11/25 23:39:24 paulus Exp $"
|
||
|
|
#endif /* LIBC_SCCS and not lint */
|
||
|
|
|
||
|
|
#include "SYS.h"
|
||
|
|
|
||
|
|
#define SYS_brk 17
|
||
|
|
|
||
|
|
.globl curbrk
|
||
|
|
.globl minbrk
|
||
|
|
ENTRY(brk)
|
||
|
|
#ifdef PIC
|
||
|
|
movl #__GLOBAL_OFFSET_TABLE_,a1
|
||
|
|
lea pc@(0,a1:l),a1
|
||
|
|
movl a1@(minbrk:w),a0
|
||
|
|
movl a0@,d0
|
||
|
|
#else
|
||
|
|
movl minbrk,d0
|
||
|
|
#endif
|
||
|
|
cmpl sp@(4),d0
|
||
|
|
jle ok
|
||
|
|
movl d0,sp@(4)
|
||
|
|
ok:
|
||
|
|
movl #SYS_brk,d0
|
||
|
|
trap #0
|
||
|
|
jcs err
|
||
|
|
#ifdef PIC
|
||
|
|
movl a1@(curbrk:w),a0
|
||
|
|
movl sp@(4),a0@
|
||
|
|
#else
|
||
|
|
movl sp@(4),curbrk
|
||
|
|
#endif
|
||
|
|
clrl d0
|
||
|
|
rts
|
||
|
|
err:
|
||
|
|
#ifdef PIC
|
||
|
|
movl d0,sp@-
|
||
|
|
#endif
|
||
|
|
jra cerror
|