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 * $FreeBSD$
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_GS(%eax),%gs /* restore %gs */
49 movl IA32_UC_FS(%eax),%fs /* restore %fs */
50 movl IA32_UC_ES(%eax),%es /* restore %es */
51 movl IA32_UC_DS(%eax),%ds /* restore %ds */
52 movl $SYS_sigreturn,%eax
53 pushl %eax /* junk to fake return addr. */
54 int $0x80 /* enter kernel with args */
55 /* on stack */
56 1:
57 jmp 1b
58
59 #ifdef COMPAT_FREEBSD4
60 ALIGN_TEXT
61 freebsd4_ia32_sigcode:
62 calll *IA32_SIGF_HANDLER(%esp)
63 leal IA32_SIGF_UC4(%esp),%eax/* get ucontext */
64 pushl %eax
65 movl IA32_UC4_GS(%eax),%gs /* restore %gs */
66 movl IA32_UC4_FS(%eax),%fs /* restore %fs */
67 movl IA32_UC4_ES(%eax),%es /* restore %es */
68 movl IA32_UC4_DS(%eax),%ds /* restore %ds */
69 movl $344,%eax /* 4.x SYS_sigreturn */
70 pushl %eax /* junk to fake return addr. */
71 int $0x80 /* enter kernel with args */
72 /* on stack */
73 1:
74 jmp 1b
75 #endif
76
77 ALIGN_TEXT
78 esigcode:
79
80 .data
81 .globl sz_ia32_sigcode
82 sz_ia32_sigcode:
83 .long esigcode-ia32_sigcode
84 #ifdef COMPAT_FREEBSD4
85 .globl sz_freebsd4_ia32_sigcode
86 sz_freebsd4_ia32_sigcode:
87 .long esigcode-freebsd4_ia32_sigcode
88 #endif
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