f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
93 lines
2.6 KiB
ArmAsm
93 lines
2.6 KiB
ArmAsm
/* $NetBSD: brk.S,v 1.22 2011/11/18 20:21:41 joerg 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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* William Jolitz.
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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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* from: @(#)brk.s 5.2 (Berkeley) 12/17/90
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*/
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#include <machine/asm.h>
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#if defined(SYSLIBC_SCCS) && !defined(lint)
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RCSID("$NetBSD: brk.S,v 1.22 2011/11/18 20:21:41 joerg Exp $")
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#endif /* SYSLIBC_SCCS and not lint */
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#include "SYS.h"
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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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movl 4(%esp),%ecx
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PIC_PROLOGUE
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movl PIC_GOT(_C_LABEL(__minbrk)),%edx
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PIC_EPILOGUE
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cmpl %ecx,(%edx)
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jb 1f
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movl (%edx),%ecx
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movl %ecx,4(%esp)
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1:
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OSYSTRAP(break) /* don't clobber %ecx */
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jc err
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PIC_PROLOGUE
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movl PIC_GOT(CURBRK),%edx # set up GOT addressing
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PIC_EPILOGUE
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movl %ecx,(%edx)
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xorl %eax,%eax
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ret
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err:
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jmp CERROR
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#else
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movl 4(%esp),%ecx
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cmpl %ecx,_C_LABEL(__minbrk)
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jb 1f
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movl _C_LABEL(__minbrk),%ecx
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movl %ecx,4(%esp)
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1:
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OSYSTRAP(break) /* don't clobber %ecx */
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jc err
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movl %ecx,CURBRK
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xorl %eax,%eax
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ret
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err:
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jmp CERROR
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#endif
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