diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-27 07:38:02 -0400 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-27 07:38:02 -0400 |
commit | 5292ae11babca23c3ff82593630d2d7eebc350a9 (patch) | |
tree | 30a6c8123b35686098f306ea39398b7621f42054 /arch/um/sys-i386/shared/sysdep/stub.h | |
parent | b0f209898f1a177bd503d49215b8c6628797a81c (diff) | |
parent | 0173a3265b228da319ceb9c1ec6a5682fd1b2d92 (diff) |
Merge commit 'v2.6.28-rc2' into x86/uv
Diffstat (limited to 'arch/um/sys-i386/shared/sysdep/stub.h')
-rw-r--r-- | arch/um/sys-i386/shared/sysdep/stub.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/um/sys-i386/shared/sysdep/stub.h b/arch/um/sys-i386/shared/sysdep/stub.h new file mode 100644 index 000000000000..977dedd9221b --- /dev/null +++ b/arch/um/sys-i386/shared/sysdep/stub.h | |||
@@ -0,0 +1,101 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) | ||
3 | * Licensed under the GPL | ||
4 | */ | ||
5 | |||
6 | #ifndef __SYSDEP_STUB_H | ||
7 | #define __SYSDEP_STUB_H | ||
8 | |||
9 | #include <sys/mman.h> | ||
10 | #include <asm/ptrace.h> | ||
11 | #include <asm/unistd.h> | ||
12 | #include "as-layout.h" | ||
13 | #include "stub-data.h" | ||
14 | #include "kern_constants.h" | ||
15 | |||
16 | extern void stub_segv_handler(int sig); | ||
17 | extern void stub_clone_handler(void); | ||
18 | |||
19 | #define STUB_SYSCALL_RET EAX | ||
20 | #define STUB_MMAP_NR __NR_mmap2 | ||
21 | #define MMAP_OFFSET(o) ((o) >> UM_KERN_PAGE_SHIFT) | ||
22 | |||
23 | static inline long stub_syscall0(long syscall) | ||
24 | { | ||
25 | long ret; | ||
26 | |||
27 | __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall)); | ||
28 | |||
29 | return ret; | ||
30 | } | ||
31 | |||
32 | static inline long stub_syscall1(long syscall, long arg1) | ||
33 | { | ||
34 | long ret; | ||
35 | |||
36 | __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1)); | ||
37 | |||
38 | return ret; | ||
39 | } | ||
40 | |||
41 | static inline long stub_syscall2(long syscall, long arg1, long arg2) | ||
42 | { | ||
43 | long ret; | ||
44 | |||
45 | __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), | ||
46 | "c" (arg2)); | ||
47 | |||
48 | return ret; | ||
49 | } | ||
50 | |||
51 | static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) | ||
52 | { | ||
53 | long ret; | ||
54 | |||
55 | __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), | ||
56 | "c" (arg2), "d" (arg3)); | ||
57 | |||
58 | return ret; | ||
59 | } | ||
60 | |||
61 | static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, | ||
62 | long arg4) | ||
63 | { | ||
64 | long ret; | ||
65 | |||
66 | __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), | ||
67 | "c" (arg2), "d" (arg3), "S" (arg4)); | ||
68 | |||
69 | return ret; | ||
70 | } | ||
71 | |||
72 | static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3, | ||
73 | long arg4, long arg5) | ||
74 | { | ||
75 | long ret; | ||
76 | |||
77 | __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), | ||
78 | "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5)); | ||
79 | |||
80 | return ret; | ||
81 | } | ||
82 | |||
83 | static inline void trap_myself(void) | ||
84 | { | ||
85 | __asm("int3"); | ||
86 | } | ||
87 | |||
88 | static inline void remap_stack(int fd, unsigned long offset) | ||
89 | { | ||
90 | __asm__ volatile ("movl %%eax,%%ebp ; movl %0,%%eax ; int $0x80 ;" | ||
91 | "movl %7, %%ebx ; movl %%eax, (%%ebx)" | ||
92 | : : "g" (STUB_MMAP_NR), "b" (STUB_DATA), | ||
93 | "c" (UM_KERN_PAGE_SIZE), | ||
94 | "d" (PROT_READ | PROT_WRITE), | ||
95 | "S" (MAP_FIXED | MAP_SHARED), "D" (fd), | ||
96 | "a" (offset), | ||
97 | "i" (&((struct stub_data *) STUB_DATA)->err) | ||
98 | : "memory"); | ||
99 | } | ||
100 | |||
101 | #endif | ||