arch/um/include/sysdep-i386/stub.h

   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 <asm/ptrace.h>
  10 #include <asm/unistd.h>
  11
  12 extern void stub_segv_handler(int sig);
  13 extern void stub_clone_handler(void);
  14
  15 #define STUB_SYSCALL_RET EAX
  16 #define STUB_MMAP_NR __NR_mmap2
  17 #define MMAP_OFFSET(o) ((o) >> PAGE_SHIFT)
  18
  19 static inline long stub_syscall0(long syscall)
  20 {
  21         long ret;
  22
  23         __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall));
  24
  25         return ret;
  26 }
  27
  28 static inline long stub_syscall1(long syscall, long arg1)
  29 {
  30         long ret;
  31
  32         __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1));
  33
  34         return ret;
  35 }
  36
  37 static inline long stub_syscall2(long syscall, long arg1, long arg2)
  38 {
  39         long ret;
  40
  41         __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
  42                         "c" (arg2));
  43
  44         return ret;
  45 }
  46
  47 static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
  48 {
  49         long ret;
  50
  51         __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
  52                         "c" (arg2), "d" (arg3));
  53
  54         return ret;
  55 }
  56
  57 static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
  58                                  long arg4)
  59 {
  60         long ret;
  61
  62         __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
  63                         "c" (arg2), "d" (arg3), "S" (arg4));
  64
  65         return ret;
  66 }
  67
  68 static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
  69                                  long arg4, long arg5)
  70 {
  71         long ret;
  72
  73         __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
  74                         "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5));
  75
  76         return ret;
  77 }
  78
  79 static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3,
  80                                  long arg4, long arg5, long arg6)
  81 {
  82         long ret;
  83
  84         __asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; "
  85                         "int $0x80 ; pop %%ebp"
  86                         : "=a" (ret)
  87                         : "g" (syscall), "b" (arg1), "c" (arg2), "d" (arg3),
  88                           "S" (arg4), "D" (arg5), "0" (arg6));
  89
  90         return ret;
  91 }
  92
  93 static inline void trap_myself(void)
  94 {
  95         __asm("int3");
  96 }
  97
  98 #endif