b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
90 lines
2.9 KiB
ArmAsm
90 lines
2.9 KiB
ArmAsm
/* $NetBSD: sbrk.S,v 1.10 2007/10/08 13:06:00 uwe Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This software was developed by the Computer Systems Engineering group
|
|
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
|
* contributed to Berkeley.
|
|
*
|
|
* 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. 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.
|
|
*
|
|
* from: Header: sbrk.s,v 1.3 92/07/02 00:56:49 torek Exp
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
#if defined(SYSLIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
.asciz "@(#)sbrk.s 8.1 (Berkeley) 6/4/93"
|
|
#else
|
|
RCSID("$NetBSD: sbrk.S,v 1.10 2007/10/08 13:06:00 uwe Exp $")
|
|
#endif
|
|
#endif /* SYSLIBC_SCCS and not lint */
|
|
|
|
#include "SYS.h"
|
|
|
|
.globl _end
|
|
.globl CURBRK
|
|
|
|
#ifdef WEAK_ALIAS
|
|
WEAK_ALIAS(sbrk, _sbrk)
|
|
#endif
|
|
|
|
.data
|
|
CURBRK: .long _end
|
|
.text
|
|
|
|
ENTRY(_sbrk)
|
|
#ifdef PIC
|
|
PIC_PROLOGUE(%o5,%o4)
|
|
set CURBRK, %o2
|
|
ld [%o5 + %o2], %o2
|
|
ld [%o2], %o3 ! %o3 = old break
|
|
add %o3, %o0, %o4 ! %o4 = new break
|
|
mov %o4, %o0 ! copy for syscall
|
|
mov SYS_break, %g1
|
|
t ST_SYSCALL ! break(new_break)
|
|
bcc,a 1f ! if success,
|
|
mov %o3, %o0 ! set return value
|
|
ERROR()
|
|
1:
|
|
retl ! and update curbrk
|
|
st %o4, [%o2]
|
|
#else
|
|
sethi %hi(CURBRK), %o2
|
|
ld [%o2 + %lo(CURBRK)], %o3 ! %o3 = old break
|
|
add %o3, %o0, %o4 ! %o4 = new break
|
|
mov %o4, %o0 ! copy for syscall
|
|
mov SYS_break, %g1
|
|
t ST_SYSCALL ! break(new_break)
|
|
bcc,a 1f ! if success,
|
|
mov %o3, %o0 ! set return value
|
|
ERROR()
|
|
1:
|
|
retl ! and update curbrk
|
|
st %o4, [%o2 + %lo(CURBRK)]
|
|
#endif
|