projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e32dacb9 | 1 | /* |
| ba180fd4 | 2 | * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
| e32dacb9 JD |
3 | * Licensed under the GPL |
| 4 | */ | |
| 5 | ||
| 37185b33 AV |
6 | #include <linux/kernel.h> |
| 7 | #include <linux/ptrace.h> | |
| c50b4659 | 8 | #include <linux/seccomp.h> |
| 37185b33 AV |
9 | #include <kern_util.h> |
| 10 | #include <sysdep/ptrace.h> | |
| e04c989e | 11 | #include <sysdep/ptrace_user.h> |
| 37185b33 | 12 | #include <sysdep/syscalls.h> |
| e32dacb9 | 13 | |
| 77bf4400 | 14 | void handle_syscall(struct uml_pt_regs *r) |
| e32dacb9 JD |
15 | { |
| 16 | struct pt_regs *regs = container_of(r, struct pt_regs, regs); | |
| e32dacb9 | 17 | int syscall; |
| e32dacb9 | 18 | |
| e04c989e MS |
19 | /* Initialize the syscall number and default return value. */ |
| 20 | UPT_SYSCALL_NR(r) = PT_SYSCALL_NR(r->gp); | |
| 21 | PT_REGS_SET_SYSCALL_RETURN(regs, -ENOSYS); | |
| 22 | ||
| 26703c63 | 23 | if (syscall_trace_enter(regs)) |
| 972939e2 | 24 | goto out; |
| c50b4659 | 25 | |
| 26703c63 KC |
26 | /* Do the seccomp check after ptrace; failures should be fast. */ |
| 27 | if (secure_computing(NULL) == -1) | |
| 972939e2 | 28 | goto out; |
| e32dacb9 | 29 | |
| e04c989e | 30 | syscall = UPT_SYSCALL_NR(r); |
| e04c989e MS |
31 | if (syscall >= 0 && syscall <= __NR_syscall_max) |
| 32 | PT_REGS_SET_SYSCALL_RETURN(regs, | |
| 33 | EXECUTE_SYSCALL(syscall, regs)); | |
| e32dacb9 | 34 | |
| 972939e2 | 35 | out: |
| 1bfa2317 | 36 | syscall_trace_leave(regs); |
| e32dacb9 | 37 | } |