ia32_sigtramp.S

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    1 /*-
    2  * Copyright (c) 2003 Peter Wemm
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/8.4/sys/amd64/ia32/ia32_sigtramp.S 190620 2009-04-01 13:09:26Z kib $
   27  */
   28 
   29 #include "opt_compat.h"
   30 
   31 #include <machine/asmacros.h>
   32 #include <sys/syscall.h>
   33 
   34 #include "ia32_assym.h"
   35 
   36         .text
   37         .code32
   38 /*
   39  * Signal trampoline, copied to top of user stack
   40  * XXX may need to be MD to match backend sendsig handoff protocol
   41  */
   42         ALIGN_TEXT
   43         .globl  ia32_sigcode
   44 ia32_sigcode:
   45         calll   *IA32_SIGF_HANDLER(%esp)
   46         leal    IA32_SIGF_UC(%esp),%eax /* get ucontext */
   47         pushl   %eax
   48         movl    $SYS_sigreturn,%eax
   49         pushl   %eax                    /* junk to fake return addr. */
   50         int     $0x80                   /* enter kernel with args */
   51                                         /* on stack */
   52 1:
   53         jmp     1b
   54 
   55 #ifdef COMPAT_FREEBSD4
   56         ALIGN_TEXT
   57 freebsd4_ia32_sigcode:
   58         calll   *IA32_SIGF_HANDLER(%esp)
   59         leal    IA32_SIGF_UC4(%esp),%eax/* get ucontext */
   60         pushl   %eax
   61         movl    $344,%eax               /* 4.x SYS_sigreturn */
   62         pushl   %eax                    /* junk to fake return addr. */
   63         int     $0x80                   /* enter kernel with args */
   64                                         /* on stack */
   65 1:
   66         jmp     1b
   67 #endif
   68 
   69         ALIGN_TEXT
   70 esigcode:
   71 
   72         .data
   73         .globl  sz_ia32_sigcode
   74 sz_ia32_sigcode:
   75         .long   esigcode-ia32_sigcode
   76 #ifdef COMPAT_FREEBSD4
   77         .globl  sz_freebsd4_ia32_sigcode
   78 sz_freebsd4_ia32_sigcode:
   79         .long   esigcode-freebsd4_ia32_sigcode
   80 #endif

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FreeBSD/Linux Kernel Cross Reference sys/amd64/ia32/ia32_sigtramp.S

FreeBSD/Linux Kernel Cross Reference
sys/amd64/ia32/ia32_sigtramp.S