/*      $OpenBSD: sigcode.S,v 1.14 2023/12/12 07:37:20 deraadt Exp $    */
/*      $NetBSD: sigcode.S,v 1.6 2003/10/05 19:44:58 matt Exp $ */

/*
 * Copyright (C) 1994-1997 Mark Brinicombe
 * Copyright (C) 1994 Brini
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Brini.
 * 4. The name of Brini may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY BRINI ``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 BRINI 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 "assym.h"

#include <sys/syscall.h>

#include <machine/asm.h>

/*
 * Signal trampoline; 
 */

        .section .rodata
        .align  2
        .globl  sigcode
        .type   x,_ASM_TYPE_FUNCTION
sigcode:
/*
 * The kernel arranges for the handler to be invoked directly.  This
 * trampoline is used only to return from the signal.
 *
 * The stack pointer points to the saved sigcontext.
 */
/*      mov     r0, sp */
        add     r0, sp, #SIGF_SC
        mov     r12, #SYS_sigreturn
        .globl  sigcodecall
sigcodecall:
        swi     0
        dsb     nsh
        isb
        .globl  sigcoderet
sigcoderet:
        .global esigcode
esigcode:
        /* FALLTHROUGH */
        .globl  sigfill
sigfill:
        udf     #0
esigfill:

        .data
        .align  2
        .globl  sigfillsiz
sigfillsiz:
        .word   esigfill - sigfill

        .text