2 * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
3 * Licensed under the GPL
6 #ifndef __SYSDEP_STUB_H
7 #define __SYSDEP_STUB_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"
17 extern void stub_segv_handler(int sig);
18 extern void stub_clone_handler(void);
20 #define STUB_SYSCALL_RET EAX
21 #define STUB_MMAP_NR __NR_mmap2
22 #define MMAP_OFFSET(o) ((o) >> UM_KERN_PAGE_SHIFT)
24 static inline long stub_syscall0(long syscall)
28 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall));
33 static inline long stub_syscall1(long syscall, long arg1)
37 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1));
42 static inline long stub_syscall2(long syscall, long arg1, long arg2)
46 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
52 static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
56 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
57 "c" (arg2), "d" (arg3));
62 static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
67 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
68 "c" (arg2), "d" (arg3), "S" (arg4));
73 static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
78 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
79 "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5));
84 static inline void trap_myself(void)
89 static inline void remap_stack(int fd, unsigned long offset)
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),
98 "i" (&((struct stub_data *) STUB_DATA)->err)