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/* $OpenBSD: sbrk.S,v 1.7 2022/09/02 06:19:04 miod Exp $ */
/* $NetBSD: sbrk.S,v 1.9 2006/01/06 03:58:31 uwe Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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: @(#)sbrk.s 5.1 (Berkeley) 4/23/90
*/
#include "SYS.h"
.globl _C_LABEL(_end)
.globl __curbrk
.hidden __curbrk
.weak sbrk
.data
__curbrk:
.long _C_LABEL(_end)
.size __curbrk, . - __curbrk
.type __curbrk,@object
.text
ENTRY(sbrk)
mov r4, r2
#ifdef __PIC__
mova L_GOT, r0
mov.l L_GOT, r3
add r0, r3
mov.l Lcurbrk, r0
mov.l @(r0, r3), r0
#else
mov.l Lcurbrk, r0
#endif
mov.l @r0, r0
add r0, r4
#if SYS_break >= 128
mov.l LSYS_break, r0
#else
mov #SYS_break, r0
#endif
trapa #0x80
bf 1f
#ifdef __PIC__
mov.l Lcurbrk, r0
mov.l @(r0, r3), r1
#else
mov.l Lcurbrk, r1
#endif
mov.l @r1, r0
add r0, r2
rts
mov.l r2, @r1
1:
SET_ERRNO_AND_RETURN
.align 2
#if SYS_break >= 128
LSYS_break: .long SYS_break
#endif
#ifdef __PIC__
L_GOT: .long _GLOBAL_OFFSET_TABLE_
Lcurbrk: .long __curbrk@GOT
#else
Lcurbrk: .long __curbrk
#endif
SET_ENTRY_SIZE(sbrk)
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