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-rw-r--r--arch/um/sys-i386/shared/sysdep/stub.h102
1 files changed, 102 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..8c097b87fca7
--- /dev/null
+++ b/arch/um/sys-i386/shared/sysdep/stub.h
@@ -0,0 +1,102 @@
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#include "uml-config.h"
16
17extern void stub_segv_handler(int sig);
18extern void stub_clone_handler(void);
19
20#define STUB_SYSCALL_RET EAX
21#define STUB_MMAP_NR __NR_mmap2
22#define MMAP_OFFSET(o) ((o) >> UM_KERN_PAGE_SHIFT)
23
24static inline long stub_syscall0(long syscall)
25{
26 long ret;
27
28 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall));
29
30 return ret;
31}
32
33static inline long stub_syscall1(long syscall, long arg1)
34{
35 long ret;
36
37 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1));
38
39 return ret;
40}
41
42static inline long stub_syscall2(long syscall, long arg1, long arg2)
43{
44 long ret;
45
46 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
47 "c" (arg2));
48
49 return ret;
50}
51
52static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
53{
54 long ret;
55
56 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
57 "c" (arg2), "d" (arg3));
58
59 return ret;
60}
61
62static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
63 long arg4)
64{
65 long ret;
66
67 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
68 "c" (arg2), "d" (arg3), "S" (arg4));
69
70 return ret;
71}
72
73static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
74 long arg4, long arg5)
75{
76 long ret;
77
78 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
79 "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5));
80
81 return ret;
82}
83
84static inline void trap_myself(void)
85{
86 __asm("int3");
87}
88
89static inline void remap_stack(int fd, unsigned long offset)
90{
91 __asm__ volatile ("movl %%eax,%%ebp ; movl %0,%%eax ; int $0x80 ;"
92 "movl %7, %%ebx ; movl %%eax, (%%ebx)"
93 : : "g" (STUB_MMAP_NR), "b" (STUB_DATA),
94 "c" (UM_KERN_PAGE_SIZE),
95 "d" (PROT_READ | PROT_WRITE),
96 "S" (MAP_FIXED | MAP_SHARED), "D" (fd),
97 "a" (offset),
98 "i" (&((struct stub_data *) STUB_DATA)->err)
99 : "memory");
100}
101
102#endif