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/unistd.h>
11 #include <sysdep/ptrace_user.h>
12 #include "as-layout.h"
13 #include "stub-data.h"
14 #include "kern_constants.h"
16 extern void stub_segv_handler(int sig);
17 extern void stub_clone_handler(void);
19 #define STUB_SYSCALL_RET PT_INDEX(RAX)
20 #define STUB_MMAP_NR __NR_mmap
21 #define MMAP_OFFSET(o) (o)
23 #define __syscall_clobber "r11","rcx","memory"
24 #define __syscall "syscall"
26 static inline long stub_syscall0(long syscall)
30 __asm__ volatile (__syscall
32 : "0" (syscall) : __syscall_clobber );
37 static inline long stub_syscall2(long syscall, long arg1, long arg2)
41 __asm__ volatile (__syscall
43 : "0" (syscall), "D" (arg1), "S" (arg2) : __syscall_clobber );
48 static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
52 __asm__ volatile (__syscall
54 : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3)
55 : __syscall_clobber );
60 static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
65 __asm__ volatile ("movq %5,%%r10 ; " __syscall
67 : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3),
69 : __syscall_clobber, "r10" );
74 static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
79 __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; " __syscall
81 : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3),
82 "g" (arg4), "g" (arg5)
83 : __syscall_clobber, "r10", "r8" );
88 static inline void trap_myself(void)
93 static inline void remap_stack(long fd, unsigned long offset)
95 __asm__ volatile ("movq %4,%%r10 ; movq %5,%%r8 ; "
96 "movq %6, %%r9; " __syscall "; movq %7, %%rbx ; "
97 "movq %%rax, (%%rbx)":
98 : "a" (STUB_MMAP_NR), "D" (STUB_DATA),
99 "S" (UM_KERN_PAGE_SIZE),
100 "d" (PROT_READ | PROT_WRITE),
101 "g" (MAP_FIXED | MAP_SHARED), "g" (fd),
103 "i" (&((struct stub_data *) STUB_DATA)->err)
104 : __syscall_clobber, "r10", "r8", "r9" );