minix/lib/nbsd_libc/arch/i386/sys/__sigtramp2.S

53 lines
2.2 KiB
ArmAsm
Raw Normal View History

/* $NetBSD: __sigtramp2.S,v 1.4 2008/04/28 20:22:56 martin Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 "SYS.h"
/*
* The i386 signal trampoline is invoked only to return from
* the signal; the kernel calls the signal handler directly.
*
* On entry, stack looks like:
*
* ucontext structure [12+sizeof(siginfo_t)]
* siginfo structure [12]
* pointer to ucontext structure [8]
* pointer to siginfo structure [4]
* sp-> signal number [0]
*/
NENTRY(__sigtramp_siginfo_2)
leal 12+128(%esp),%eax /* get address of ucontext */
movl %eax,4(%esp) /* put it in the argument slot */
/* fake return address already there */
SYSTRAP(setcontext) /* do setcontext */
movl $-1,4(%esp) /* if we return here, something is wrong */
SYSTRAP(exit) /* exit */