81 lines
2.4 KiB
ArmAsm
81 lines
2.4 KiB
ArmAsm
/* $OpenBSD: sigcode.S,v 1.14 2023/12/12 07:37:20 deraadt Exp $ */
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/* $NetBSD: sigcode.S,v 1.6 2003/10/05 19:44:58 matt Exp $ */
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/*
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* Copyright (C) 1994-1997 Mark Brinicombe
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* Copyright (C) 1994 Brini
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of Brini may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "assym.h"
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#include <sys/syscall.h>
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#include <machine/asm.h>
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/*
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* Signal trampoline;
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*/
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.section .rodata
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.align 2
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.globl sigcode
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.type x,_ASM_TYPE_FUNCTION
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sigcode:
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/*
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* The kernel arranges for the handler to be invoked directly. This
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* trampoline is used only to return from the signal.
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*
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* The stack pointer points to the saved sigcontext.
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*/
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/* mov r0, sp */
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add r0, sp, #SIGF_SC
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mov r12, #SYS_sigreturn
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.globl sigcodecall
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sigcodecall:
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swi 0
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dsb nsh
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isb
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.globl sigcoderet
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sigcoderet:
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.global esigcode
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esigcode:
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/* FALLTHROUGH */
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.globl sigfill
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sigfill:
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udf #0
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esigfill:
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.data
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.align 2
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.globl sigfillsiz
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sigfillsiz:
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.word esigfill - sigfill
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.text
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