freebsd-dev/lib/libc/amd64/sys/sbrk.S
Garrett Wollman 2ceb2ce9ee First crack at making libc work with the new make macros. It compiles on
my machine, and a simple static (genassym) and shared (sysctl) executable
both work.  Still to be done: RPCand YP merge.
1994-08-05 01:19:12 +00:00

90 lines
2.6 KiB
ArmAsm

/*-
* 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.
*
* $Id: sbrk.S,v 1.2 1994/02/21 05:19:16 rgrimes Exp $
*/
#if defined(SYSLIBC_SCCS) && !defined(lint)
.asciz "@(#)sbrk.s 5.1 (Berkeley) 4/23/90"
#endif /* SYSLIBC_SCCS and not lint */
#include "SYS.h"
#define SYS_brk 17
.globl _end
.globl minbrk
.globl curbrk
.data
minbrk: .long _end
curbrk: .long _end
.text
ENTRY(sbrk)
#ifdef PIC
movl 4(%esp),%ecx
PIC_PROLOGUE
movl PIC_GOT(curbrk),%edx
movl (%edx),%eax
PIC_EPILOGUE
addl %eax,4(%esp)
lea SYS_brk,%eax
LCALL(7,0)
jb err
PIC_PROLOGUE
movl PIC_GOT(curbrk),%edx
movl (%edx),%eax
addl %ecx,(%edx)
PIC_EPILOGUE
ret
err:
jmp PIC_PLT(cerror)
#else
movl 4(%esp),%ecx
movl curbrk,%eax
addl %eax,4(%esp)
lea SYS_brk,%eax
LCALL(7,0)
jb err
movl curbrk,%eax
addl %ecx,curbrk
ret
err:
jmp cerror
#endif