94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __SYSDEP_STUB_H
|
|
#define __SYSDEP_STUB_H
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
#define STUB_SYSCALL_RET EAX
|
|
#define STUB_MMAP_NR __NR_mmap2
|
|
#define MMAP_OFFSET(o) ((o) >> UM_KERN_PAGE_SHIFT)
|
|
|
|
static inline long stub_syscall0(long syscall)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall1(long syscall, long arg1)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall2(long syscall, long arg1, long arg2)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
|
|
"c" (arg2));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
|
|
"c" (arg2), "d" (arg3));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
|
|
long arg4)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
|
|
"c" (arg2), "d" (arg3), "S" (arg4));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
|
|
long arg4, long arg5)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
|
|
"c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline void trap_myself(void)
|
|
{
|
|
__asm("int3");
|
|
}
|
|
|
|
static inline void remap_stack(int fd, unsigned long offset)
|
|
{
|
|
__asm__ volatile ("movl %%eax,%%ebp ; movl %0,%%eax ; int $0x80 ;"
|
|
"movl %7, %%ebx ; movl %%eax, (%%ebx)"
|
|
: : "g" (STUB_MMAP_NR), "b" (STUB_DATA),
|
|
"c" (UM_KERN_PAGE_SIZE),
|
|
"d" (PROT_READ | PROT_WRITE),
|
|
"S" (MAP_FIXED | MAP_SHARED), "D" (fd),
|
|
"a" (offset),
|
|
"i" (&((struct stub_data *) STUB_DATA)->err)
|
|
: "memory");
|
|
}
|
|
|
|
#endif
|