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Annotation of sys/arch/arm/arm/sigcode.S, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: sigcode.S,v 1.2 2006/12/27 17:49:26 drahn Exp $       */
                      2: /*     $NetBSD: sigcode.S,v 1.6 2003/10/05 19:44:58 matt Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (C) 1994-1997 Mark Brinicombe
                      6:  * Copyright (C) 1994 Brini
                      7:  * All rights reserved.
                      8:  *
                      9:  * Redistribution and use in source and binary forms, with or without
                     10:  * modification, are permitted provided that the following conditions
                     11:  * are met:
                     12:  * 1. Redistributions of source code must retain the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer.
                     14:  * 2. Redistributions in binary form must reproduce the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer in the
                     16:  *    documentation and/or other materials provided with the distribution.
                     17:  * 3. All advertising materials mentioning features or use of this software
                     18:  *    must display the following acknowledgement:
                     19:  *     This product includes software developed by Brini.
                     20:  * 4. The name of Brini may not be used to endorse or promote products
                     21:  *    derived from this software without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR
                     24:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     25:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     26:  * IN NO EVENT SHALL BRINI BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
                     27:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
                     28:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
                     29:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
                     30:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
                     31:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
                     32:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     33:  */
                     34:
                     35: #include <machine/asm.h>
                     36:
                     37: #include "assym.h"
                     38: #include <sys/syscall.h>
                     39:
                     40: /*
                     41:  * Signal trampoline;
                     42:  */
                     43:
                     44: ENTRY_NP(sigcode)
                     45: /*
                     46:  * The kernel arranges for the handler to be invoked directly.  This
                     47:  * trampoline is used only to return from the signal.
                     48:  *
                     49:  * The stack pointer points to the saved sigcontext.
                     50:  */
                     51: /*     mov     r0, sp */
                     52:        add     r0, sp, #SIGF_SC
                     53:        ldr     r12, =SYS_sigreturn
                     54:        swi     SYS_sigreturn
                     55:
                     56: /* Well if that failed we better exit quick ! */
                     57:
                     58:        swi     SYS_exit
                     59:        b       . - 8
                     60:
                     61:        .align  0
                     62:         .global _C_LABEL(esigcode)
                     63: _C_LABEL(esigcode):