95 lines
2.7 KiB
ArmAsm
95 lines
2.7 KiB
ArmAsm
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/* $NetBSD: brk.S,v 1.15 2003/12/26 11:21:48 martin Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "SYS.h"
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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RCSID("from: @(#)brk.s 5.1 (Berkeley) 5/12/90")
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#else
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RCSID("$NetBSD: brk.S,v 1.15 2003/12/26 11:21:48 martin Exp $")
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#endif
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#endif /* LIBC_SCCS and not lint */
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.globl _end
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.globl _C_LABEL(__minbrk)
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.globl CURBRK
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#ifdef WEAK_ALIAS
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WEAK_ALIAS(brk, _brk)
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#endif
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.data
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_C_LABEL(__minbrk):
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.long _end
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.text
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ENTRY(_brk)
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#ifdef PIC
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#ifdef __ELF__
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lea %pc@(_GLOBAL_OFFSET_TABLE_@GOTPC),%a1
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movl %a1@(_C_LABEL(__minbrk)@GOT:w),%a0
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#else
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movl #_C_LABEL(_GLOBAL_OFFSET_TABLE_),%a1
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lea %pc@(0,a1:l),%a1
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movl %a1@(_C_LABEL(__minbrk):w),%a0
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#endif
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movl %a0@,%d0
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#else
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movl _C_LABEL(__minbrk),%d0
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#endif
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cmpl %sp@(4),%d0
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jls ok
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movl %d0,%sp@(4)
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ok:
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movl #SYS_break,%d0
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trap #0
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jcs err
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#ifdef PIC
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#ifdef __ELF__
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movl %a1@(CURBRK@GOT:w),%a0
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#else
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movl %a1@(CURBRK:w),%a0
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#endif
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movl %sp@(4),%a0@
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#else
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movl %sp@(4),CURBRK
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#endif
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clrl %d0
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rts
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err:
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jra PIC_PLT(CERROR)
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