Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-for-linus-2.6
[linux-2.6] / 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 #ifdef CONFIG_SYSCALL_DEBUG
25         int index;
26         index = record_syscall_start(syscall);
27 #endif
28         sc = UPT_SC(&regs->regs);
29         SC_START_SYSCALL(sc);
30
31         syscall_trace(&regs->regs, 0);
32
33         current->thread.nsyscalls++;
34         nsyscalls++;
35         syscall = UPT_SYSCALL_NR(&regs->regs);
36
37         if((syscall >= NR_syscalls) || (syscall < 0))
38                 result = -ENOSYS;
39         else result = EXECUTE_SYSCALL(syscall, regs);
40
41         /* regs->sc may have changed while the system call ran (there may
42          * have been an interrupt or segfault), so it needs to be refreshed.
43          */
44         UPT_SC(&regs->regs) = sc;
45
46         SC_SET_SYSCALL_RETURN(sc, result);
47
48         syscall_trace(&regs->regs, 1);
49 #ifdef CONFIG_SYSCALL_DEBUG
50         record_syscall_end(index, result);
51 #endif
52 }