55 lines
2.0 KiB
ArmAsm
55 lines
2.0 KiB
ArmAsm
/*-
|
|
* Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <SYS.h>
|
|
|
|
/*
|
|
* This has to be magic to handle the multiple returns.
|
|
* Otherwise, the setcontext() syscall will return here and we'll
|
|
* pop off the return address and go to the *setcontext* call.
|
|
*/
|
|
.weak _getcontext
|
|
.set _getcontext,__sys_getcontext
|
|
.weak getcontext
|
|
.set getcontext,__sys_getcontext
|
|
ENTRY(__sys_getcontext)
|
|
movq (%rsp),%rsi /* save getcontext return address */
|
|
mov $SYS_getcontext,%rax
|
|
KERNCALL
|
|
jb 1f
|
|
addq $8,%rsp /* remove stale (setcontext) return address */
|
|
jmp *%rsi /* restore return address */
|
|
1:
|
|
#ifdef PIC
|
|
movq PIC_GOT(HIDENAME(cerror)),%rdx
|
|
jmp *%rdx
|
|
#else
|
|
jmp HIDENAME(cerror)
|
|
#endif
|