The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powerpc/sigcode32.S

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    1 /* $FreeBSD: releng/9.1/sys/powerpc/powerpc/sigcode32.S 209975 2010-07-13 05:32:19Z nwhitehorn $ */
    2 /* $NetBSD: sigcode.S,v 1.1 1999/11/17 14:56:11 kleink Exp $    */
    3 
    4 /*-
    5  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
    6  * Copyright (C) 1995, 1996 TooLs GmbH.
    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 TooLs GmbH.
   20  * 4. The name of TooLs GmbH 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 TOOLS GMBH ``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 TOOLS GMBH 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 #include <sys/syscall.h>
   37 #include "assym.s"
   38 
   39 /*
   40  * The following code gets copied to the top of the user stack on process
   41  * execution.  It does signal trampolining on signal delivery.
   42  *
   43  * On entry r1 points to a struct sigframe at bottom of current stack.
   44  * All other registers are unchanged.
   45  */
   46         .globl  CNAME(sigcode32),CNAME(szsigcode32)
   47 CNAME(sigcode32):
   48         addi    1,1,-16                 /* reserved space for callee */
   49         blrl
   50         addi    3,1,16+SF_UC            /* restore sp, and get &frame->sf_uc */
   51         li      0,SYS_sigreturn
   52         sc                              /* sigreturn(scp) */
   53         li      0,SYS_exit
   54         sc                              /* exit(errno) */
   55 endsigcode32:
   56         
   57         .data
   58 CNAME(szsigcode32):
   59         .long   endsigcode32 - CNAME(sigcode32)

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