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 */
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)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
syscall_rollback(struct task_struct * task,struct pt_regs * regs)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
syscall_get_error(struct task_struct * task,struct pt_regs * regs)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
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)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
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)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
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned int i,unsigned int n,unsigned long * args)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, ®s->regs[2 + i], n * sizeof(args[0]));
53 }
54
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,unsigned int i,unsigned int n,const unsigned long * args)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(®s->regs[2 + i], args, n * sizeof(args[0]));
62 }
63
64 #endif /* __ASM_SH_SYSCALL_64_H */
65