55 lines
2.3 KiB
ArmAsm
55 lines
2.3 KiB
ArmAsm
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/* $NetBSD: __sigtramp2.S,v 1.3 2008/04/28 20:22:57 martin Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "SYS.h"
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/*
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* The SH signal trampoline is invoked only to return from
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* the signal; the kernel calls the signal handler directly.
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*
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* On entry, stack looks like:
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*
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* siginfo structure
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* sp-> ucontext structure
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*
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* NB: This order is different from what other ports use (siginfo at
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* the top of the stack), because we want to avoid wasting two
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* instructions to skip to the ucontext. Not that this order really
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* matters, but I think this inconsistency deserves an explanation.
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*/
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NENTRY(__sigtramp_siginfo_2)
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mov r15, r4 /* get pointer to ucontext */
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SYSTRAP(setcontext) /* and call setcontext() */
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mov r0, r4 /* exit with errno */
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SYSTRAP(exit) /* if sigreturn fails */
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SET_ENTRY_SIZE(__sigtramp_siginfo_2)
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