| /* |
| * 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> |
| #include <generated/asm-offsets.h> |
| |
| #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_and_trap(void) |
| { |
| __asm__ volatile ( |
| "movq %0,%%rax ;" |
| "movq %%rsp,%%rdi ;" |
| "andq %1,%%rdi ;" |
| "movq %2,%%r10 ;" |
| "movq %%rdi,%%r8 ; addq %3,%%r8 ; movq (%%r8),%%r8 ;" |
| "movq %%rdi,%%r9 ; addq %4,%%r9 ; movq (%%r9),%%r9 ;" |
| __syscall ";" |
| "movq %%rsp,%%rdi ; andq %1,%%rdi ;" |
| "addq %5,%%rdi ; movq %%rax, (%%rdi) ;" |
| "int3" |
| : : |
| "g" (STUB_MMAP_NR), |
| "g" (~(UM_KERN_PAGE_SIZE - 1)), |
| "g" (MAP_FIXED | MAP_SHARED), |
| "g" (UML_STUB_FIELD_FD), |
| "g" (UML_STUB_FIELD_OFFSET), |
| "g" (UML_STUB_FIELD_CHILD_ERR), |
| "S" (UM_KERN_PAGE_SIZE), |
| "d" (PROT_READ | PROT_WRITE) |
| : |
| __syscall_clobber, "r10", "r8", "r9"); |
| } |
| |
| #endif |