forked from Minki/linux
5c48b108ec
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/*
|
|
* Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __SYSDEP_STUB_H
|
|
#define __SYSDEP_STUB_H
|
|
|
|
#include <sysdep/ptrace_user.h>
|
|
|
|
#define STUB_SYSCALL_RET PT_INDEX(RAX)
|
|
#define STUB_MMAP_NR __NR_mmap
|
|
#define MMAP_OFFSET(o) (o)
|
|
|
|
#define __syscall_clobber "r11","rcx","memory"
|
|
#define __syscall "syscall"
|
|
|
|
static inline long stub_syscall0(long syscall)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile (__syscall
|
|
: "=a" (ret)
|
|
: "0" (syscall) : __syscall_clobber );
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall2(long syscall, long arg1, long arg2)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile (__syscall
|
|
: "=a" (ret)
|
|
: "0" (syscall), "D" (arg1), "S" (arg2) : __syscall_clobber );
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile (__syscall
|
|
: "=a" (ret)
|
|
: "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3)
|
|
: __syscall_clobber );
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
|
|
long arg4)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile ("movq %5,%%r10 ; " __syscall
|
|
: "=a" (ret)
|
|
: "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3),
|
|
"g" (arg4)
|
|
: __syscall_clobber, "r10" );
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
|
|
long arg4, long arg5)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; " __syscall
|
|
: "=a" (ret)
|
|
: "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3),
|
|
"g" (arg4), "g" (arg5)
|
|
: __syscall_clobber, "r10", "r8" );
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline void trap_myself(void)
|
|
{
|
|
__asm("int3");
|
|
}
|
|
|
|
static inline void remap_stack(long fd, unsigned long offset)
|
|
{
|
|
__asm__ volatile ("movq %4,%%r10 ; movq %5,%%r8 ; "
|
|
"movq %6, %%r9; " __syscall "; movq %7, %%rbx ; "
|
|
"movq %%rax, (%%rbx)":
|
|
: "a" (STUB_MMAP_NR), "D" (STUB_DATA),
|
|
"S" (UM_KERN_PAGE_SIZE),
|
|
"d" (PROT_READ | PROT_WRITE),
|
|
"g" (MAP_FIXED | MAP_SHARED), "g" (fd),
|
|
"g" (offset),
|
|
"i" (&((struct stub_data *) STUB_DATA)->err)
|
|
: __syscall_clobber, "r10", "r8", "r9" );
|
|
}
|
|
|
|
#endif
|