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/* $NetBSD: __sigtramp2.S,v 1.5 2021/11/27 10:00:01 skrll Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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"
#include "assym.h"
/*
* The ARM signal trampoline is invoked only to return from
* the signal; the kernel calls the signal handler directly.
*
* On entry, the stack looks like:
*
* ucontext structure
* sp-> siginfo structure
* and r5 points to the ucontext
*/
#define CFI_OFFSET(r) .cfi_offset r, r * 4
_TEXT_SECTION
.cfi_startproc
.cfi_signal_frame
.cfi_def_cfa _REG_SP, SIZEOF_SIGINFO + _UC_GREGS
CFI_OFFSET(_REG_R0)
CFI_OFFSET(_REG_R1)
CFI_OFFSET(_REG_R2)
CFI_OFFSET(_REG_R3)
CFI_OFFSET(_REG_R4)
CFI_OFFSET(_REG_R5)
CFI_OFFSET(_REG_R6)
CFI_OFFSET(_REG_R7)
CFI_OFFSET(_REG_R8)
CFI_OFFSET(_REG_R9)
CFI_OFFSET(_REG_R10)
CFI_OFFSET(_REG_R11)
CFI_OFFSET(_REG_R12)
CFI_OFFSET(_REG_R13) /* a.k.a. _REG_SP */
CFI_OFFSET(_REG_R14) /* a.k.a. _REG_LR */
.cfi_return_column _REG_R15
CFI_OFFSET(_REG_R15) /* a.k.a. _REG_PC */
/*
* The unwind entry includes the one instruction prior to the trampoline
* because the unwinder will look up (return PC - 1) while unwinding.
* Normally this would be the jump / branch, but since there isn't one in
* this case, we place an explicit nop there instead.
*/
nop
ENTRY_NP(__sigtramp_siginfo_2)
mov r0, r5 /* set the arg */
SYSTRAP(setcontext) /* and call setcontext */
/* If that failed, exit with the error code. */
SYSTRAP(exit)
.cfi_endproc
END(__sigtramp_siginfo_2)
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