Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...
[linux-2.6.git] / arch / um / kernel / tt / syscall_kern.c
1 /* 
2  * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3  * Licensed under the GPL
4  */
5
6 #include "linux/types.h"
7 #include "linux/utime.h"
8 #include "linux/sys.h"
9 #include "linux/ptrace.h"
10 #include "asm/unistd.h"
11 #include "asm/ptrace.h"
12 #include "asm/uaccess.h"
13 #include "asm/stat.h"
14 #include "sysdep/syscalls.h"
15 #include "sysdep/sigcontext.h"
16 #include "kern_util.h"
17 #include "syscall.h"
18
19 void syscall_handler_tt(int sig, struct pt_regs *regs)
20 {
21         void *sc;
22         long result;
23         int syscall;
24
25         sc = UPT_SC(&regs->regs);
26         SC_START_SYSCALL(sc);
27
28         syscall = UPT_SYSCALL_NR(&regs->regs);
29         syscall_trace(&regs->regs, 0);
30
31         current->thread.nsyscalls++;
32         nsyscalls++;
33
34         if((syscall >= NR_syscalls) || (syscall < 0))
35                 result = -ENOSYS;
36         else result = EXECUTE_SYSCALL(syscall, regs);
37
38         /* regs->sc may have changed while the system call ran (there may
39          * have been an interrupt or segfault), so it needs to be refreshed.
40          */
41         UPT_SC(&regs->regs) = sc;
42
43         SC_SET_SYSCALL_RETURN(sc, result);
44
45         syscall_trace(&regs->regs, 1);
46 }