freebsd-dev/lib/libc/i386/sys/brk.S
David Greenman 717d9cdd57 First round of changes to clean up the RCSID mess in libc:
1) Changed LIB_SCCS and SYSLIB_SCCS to LIB_RCS and SYSLIB_RCS.
2) Changed sccsid[] variables to rcsid[]
3) Moved all RCSID strings into .text
4) Converted all SCCSID's to RCS $Id$'s
5) Added missing $Id$'s after copyright.
1995-01-23 01:30:24 +00:00

93 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: brk.S,v 1.1 1994/08/05 01:18:39 wollman Exp $
*/
#if defined(SYSLIBC_RCS) && !defined(lint)
.text
.asciz "$Id$"
#endif /* SYSLIBC_RCS and not lint */
#include "SYS.h"
#define SYS_brk 17
.globl curbrk
.globl minbrk
ENTRY(_brk)
jmp ok
ENTRY(brk)
#ifdef PIC
movl 4(%esp),%eax
PIC_PROLOGUE
movl PIC_GOT(curbrk),%edx # set up GOT addressing
movl PIC_GOT(minbrk),%ecx #
cmpl %eax,(%ecx)
PIC_EPILOGUE
jl ok
movl (%ecx),%eax
movl %eax,4(%esp)
ok:
lea SYS_brk,%eax
LCALL(7,0)
jb err
movl 4(%esp),%eax
movl %eax,(%edx)
movl $0,%eax
ret
err:
jmp PIC_PLT(cerror)
#else
movl 4(%esp),%eax
cmpl %eax,minbrk
jl ok
movl minbrk,%eax
movl %eax,4(%esp)
ok:
lea SYS_brk,%eax
LCALL(7,0)
jb err
movl 4(%esp),%eax
movl %eax,curbrk
movl $0,%eax
ret
err:
jmp cerror
#endif