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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#if defined(SYSLIBC_SCCS) && !defined(lint)
.asciz "@(#)sbrk.s 5.1 (Berkeley) 4/23/90"
#endif /* SYSLIBC_SCCS and not lint */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
.globl CNAME(_end)
.globl HIDENAME(minbrk)
.globl HIDENAME(curbrk)
.data
HIDENAME(minbrk): .long CNAME(_end)
HIDENAME(curbrk): .long CNAME(_end)
.text
ENTRY(sbrk)
#ifdef PIC
movl 4(%esp),%ecx
PIC_PROLOGUE
movl PIC_GOT(HIDENAME(curbrk)),%edx
movl (%edx),%eax
PIC_EPILOGUE
testl %ecx,%ecx
jz back
addl %eax,4(%esp)
mov $SYS_break,%eax
KERNCALL
jb err
PIC_PROLOGUE
movl PIC_GOT(HIDENAME(curbrk)),%edx
movl (%edx),%eax
addl %ecx,(%edx)
PIC_EPILOGUE
back:
ret
err:
PIC_PROLOGUE
jmp PIC_PLT(HIDENAME(cerror))
#else /* !PIC */
movl 4(%esp),%ecx
movl HIDENAME(curbrk),%eax
testl %ecx,%ecx
jz back
addl %eax,4(%esp)
mov $SYS_break,%eax
KERNCALL
jb err
movl HIDENAME(curbrk),%eax
addl %ecx,HIDENAME(curbrk)
back:
ret
err:
jmp HIDENAME(cerror)
#endif /* PIC */
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