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: src/sys/amd64/ia32/ia32_sigtramp.S,v 1.3 2006/09/23 13:42:09 davidxu Exp $
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 IA32_UC_ES(%eax),%es /* restore %es */
49 movl IA32_UC_DS(%eax),%ds /* restore %ds */
50 movl $SYS_sigreturn,%eax
51 pushl %eax /* junk to fake return addr. */
52 int $0x80 /* enter kernel with args */
53 /* on stack */
54 1:
55 jmp 1b
56
57 #ifdef COMPAT_FREEBSD4
58 ALIGN_TEXT
59 freebsd4_ia32_sigcode:
60 calll *IA32_SIGF_HANDLER(%esp)
61 leal IA32_SIGF_UC4(%esp),%eax/* get ucontext */
62 pushl %eax
63 movl IA32_UC4_ES(%eax),%es /* restore %es */
64 movl IA32_UC4_DS(%eax),%ds /* restore %ds */
65 movl $344,%eax /* 4.x SYS_sigreturn */
66 pushl %eax /* junk to fake return addr. */
67 int $0x80 /* enter kernel with args */
68 /* on stack */
69 1:
70 jmp 1b
71 #endif
72
73 ALIGN_TEXT
74 esigcode:
75
76 .data
77 .globl sz_ia32_sigcode
78 sz_ia32_sigcode:
79 .long esigcode-ia32_sigcode
80 #ifdef COMPAT_FREEBSD4
81 .globl sz_freebsd4_ia32_sigcode
82 sz_freebsd4_ia32_sigcode:
83 .long esigcode-freebsd4_ia32_sigcode
84 #endif
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