Merge branch 'for-rmk/samsung6' of git://git.fluff.org/bjdooks/linux into devel-stable
[linux-2.6.git] / arch / sh / include / asm / syscall_64.h
1 #ifndef __ASM_SH_SYSCALL_64_H
2 #define __ASM_SH_SYSCALL_64_H
3
4 #include <linux/kernel.h>
5 #include <linux/sched.h>
6 #include <asm/ptrace.h>
7
8 /* The system call number is given by the user in R9 */
9 static inline long syscall_get_nr(struct task_struct *task,
10                                   struct pt_regs *regs)
11 {
12         return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
13 }
14
15 static inline void syscall_rollback(struct task_struct *task,
16                                     struct pt_regs *regs)
17 {
18         /*
19          * XXX: This needs some thought. On SH we don't
20          * save away the original R9 value anywhere.
21          */
22 }
23
24 static inline long syscall_get_error(struct task_struct *task,
25                                      struct pt_regs *regs)
26 {
27         return IS_ERR_VALUE(regs->regs[9]) ? regs->regs[9] : 0;
28 }
29
30 static inline long syscall_get_return_value(struct task_struct *task,
31                                             struct pt_regs *regs)
32 {
33         return regs->regs[9];
34 }
35
36 static inline void syscall_set_return_value(struct task_struct *task,
37                                             struct pt_regs *regs,
38                                             int error, long val)
39 {
40         if (error)
41                 regs->regs[9] = -error;
42         else
43                 regs->regs[9] = val;
44 }
45
46 static inline void syscall_get_arguments(struct task_struct *task,
47                                          struct pt_regs *regs,
48                                          unsigned int i, unsigned int n,
49                                          unsigned long *args)
50 {
51         BUG_ON(i + n > 6);
52         memcpy(args, &regs->regs[2 + i], n * sizeof(args[0]));
53 }
54
55 static inline void syscall_set_arguments(struct task_struct *task,
56                                          struct pt_regs *regs,
57                                          unsigned int i, unsigned int n,
58                                          const unsigned long *args)
59 {
60         BUG_ON(i + n > 6);
61         memcpy(&regs->regs[2 + i], args, n * sizeof(args[0]));
62 }
63
64 #endif /* __ASM_SH_SYSCALL_64_H */