blob: 51fb94076fcf92628c6e06674051bd1de232a934 [file] [log] [blame]
Jeff Dikee32dacb2005-09-03 15:57:42 -07001/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include "linux/sys.h"
7#include "linux/ptrace.h"
8#include "asm/errno.h"
9#include "asm/unistd.h"
10#include "asm/ptrace.h"
11#include "asm/current.h"
12#include "sysdep/syscalls.h"
13#include "kern_util.h"
14#include "syscall.h"
15
16void handle_syscall(union uml_pt_regs *r)
17{
18 struct pt_regs *regs = container_of(r, struct pt_regs, regs);
19 long result;
20 int syscall;
21#ifdef UML_CONFIG_SYSCALL_DEBUG
22 int index;
23
24 index = record_syscall_start(UPT_SYSCALL_NR(r));
25#endif
26 syscall_trace(r, 0);
27
28 current->thread.nsyscalls++;
29 nsyscalls++;
30
31 /* This should go in the declaration of syscall, but when I do that,
32 * strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
33 * children at all, sometimes hanging when bash doesn't see the first
34 * ls exit.
35 * The assembly looks functionally the same to me. This is
36 * gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)
37 * in case it's a compiler bug.
38 */
39 syscall = UPT_SYSCALL_NR(r);
40 if((syscall >= NR_syscalls) || (syscall < 0))
41 result = -ENOSYS;
42 else result = EXECUTE_SYSCALL(syscall, regs);
43
44 REGS_SET_SYSCALL_RETURN(r->skas.regs, result);
45
46 syscall_trace(r, 1);
47#ifdef UML_CONFIG_SYSCALL_DEBUG
48 record_syscall_end(index, result);
49#endif
50}