2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
6 #include <linux/kernel.h>
7 #include <linux/ptrace.h>
9 #include <sysdep/ptrace.h>
10 #include <sysdep/syscalls.h>
12 extern int syscall_table_size;
13 #define NR_SYSCALLS (syscall_table_size / sizeof(void *))
15 void handle_syscall(struct uml_pt_regs *r)
17 struct pt_regs *regs = container_of(r, struct pt_regs, regs);
21 syscall_trace_enter(regs);
24 * This should go in the declaration of syscall, but when I do that,
25 * strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
26 * children at all, sometimes hanging when bash doesn't see the first
28 * The assembly looks functionally the same to me. This is
29 * gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)
30 * in case it's a compiler bug.
32 syscall = UPT_SYSCALL_NR(r);
33 if ((syscall >= NR_SYSCALLS) || (syscall < 0))
35 else result = EXECUTE_SYSCALL(syscall, regs);
37 PT_REGS_SET_SYSCALL_RETURN(regs, result);
39 syscall_trace_leave(regs);