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, &regs->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(&regs->regs[2 + i], args, n * sizeof(args[0]));
62}
63
64#endif /* __ASM_SH_SYSCALL_64_H */