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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.
* 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 "@(#)brk.s 5.2 (Berkeley) 12/17/90"
#endif /* SYSLIBC_SCCS and not lint */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
.globl HIDENAME(curbrk)
.globl HIDENAME(minbrk)
ENTRY(_brk)
pushq %rdi
jmp ok
END(_brk)
ENTRY(brk)
pushq %rdi
movq %rdi,%rax
#ifdef PIC
movq PIC_GOT(HIDENAME(minbrk)),%rdx
cmpq %rax,(%rdx)
#else
cmpq %rax,HIDENAME(minbrk)(%rip)
#endif
jbe ok
#ifdef PIC
movq (%rdx),%rdi
#else
movq HIDENAME(minbrk)(%rip),%rdi
#endif
ok:
movq $SYS_break,%rax
KERNCALL
jb err
movq 0(%rsp),%rax
#ifdef PIC
movq PIC_GOT(HIDENAME(curbrk)),%rdx
movq %rax,(%rdx)
#else
movq %rax,HIDENAME(curbrk)(%rip)
#endif
movq $0,%rax
popq %rdi
ret
err:
addq $8, %rsp
#ifdef PIC
movq PIC_GOT(HIDENAME(cerror)),%rdx
jmp *%rdx
#else
jmp HIDENAME(cerror)
#endif
END(brk)
.section .note.GNU-stack,"",%progbits
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