1 /* 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Licensed under the GPL 4 */ 5 6 #include <linux/kernel.h> 7 #include <linux/ptrace.h> 8 #include <kern_util.h> 9 #include <sysdep/ptrace.h> 10 #include <sysdep/syscalls.h> 11 #include <os.h> 12 13 void handle_syscall(struct uml_pt_regs *r) 14 { 15 struct pt_regs *regs = container_of(r, struct pt_regs, regs); 16 long result; 17 int syscall; 18 19 if (syscall_trace_enter(regs)) { 20 result = -ENOSYS; 21 goto out; 22 } 23 24 syscall = get_syscall(r); 25 26 if ((syscall > __NR_syscall_max) || syscall < 0) 27 result = -ENOSYS; 28 else 29 result = EXECUTE_SYSCALL(syscall, regs); 30 31 out: 32 PT_REGS_SET_SYSCALL_RETURN(regs, result); 33 34 syscall_trace_leave(regs); 35 } 36