Linux kernel mirror (for testing)
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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 */
9static 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
15static 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
24static 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
30static inline long syscall_get_return_value(struct task_struct *task,
31 struct pt_regs *regs)
32{
33 return regs->regs[9];
34}
35
36static 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
46static 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, ®s->regs[2 + i], n * sizeof(args[0]));
53}
54
55static 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(®s->regs[2 + i], args, n * sizeof(args[0]));
62}
63
64#endif /* __ASM_SH_SYSCALL_64_H */