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/* $OpenBSD: brk.S,v 1.10 2024/03/27 20:03:29 miod Exp $ */
/* $NetBSD: brk.S,v 1.10 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: @(#)brk.s 5.2 (Berkeley) 12/17/90
*/
#include "SYS.h"
.weak brk
.data
.align 2
__minbrk:
.long _end
.size __minbrk, . - __minbrk
.type __minbrk,@object
.text
ENTRY(brk)
#ifdef __PIC__
mova L_GOT, r0
mov.l L_GOT, r2
add r0, r2
mov.l Lminbrk, r0
mov.l @(r0, r2), r0
mov.l @r0, r0
#else
mov.l Lminbrk, r0
mov.l @r0, r0
#endif
cmp/hs r4, r0
bf 1f
mov r0, r4
1:
systrap SYS_break
bf 2f
#ifdef __PIC__
mov.l Lcurbrk, r0
mov.l @(r0, r2), r1
xor r0, r0
#else
xor r0, r0
mov.l Lcurbrk, r1
#endif
rts
mov.l r4, @r1
2:
SET_ERRNO_AND_RETURN(break)
.align 2
systrap_data SYS_break
#ifdef __PIC__
L_GOT: .long _GLOBAL_OFFSET_TABLE_
Lminbrk: .long __minbrk@GOT
Lcurbrk: .long __curbrk@GOT
#else
Lminbrk: .long __minbrk
Lcurbrk: .long __curbrk
#endif
SET_ENTRY_SIZE(brk)
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