| Paul Mundt | fb4f87a | 2008-09-12 22:13:13 +0900 | [diff] [blame] | 1 | #ifndef __ASM_SH_SYSCALL_64_H |
| 2 | #define __ASM_SH_SYSCALL_64_H |
| 3 | |
| Paul Mundt | 94e2fb3 | 2008-12-10 19:46:18 +0900 | [diff] [blame] | 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 bool syscall_has_error(struct pt_regs *regs) |
| 25 | { |
| 26 | return (regs->sr & 0x1) ? true : false; |
| 27 | } |
| 28 | static inline void syscall_set_error(struct pt_regs *regs) |
| 29 | { |
| 30 | regs->sr |= 0x1; |
| 31 | } |
| 32 | static inline void syscall_clear_error(struct pt_regs *regs) |
| 33 | { |
| 34 | regs->sr &= ~0x1; |
| 35 | } |
| 36 | |
| 37 | static inline long syscall_get_error(struct task_struct *task, |
| 38 | struct pt_regs *regs) |
| 39 | { |
| 40 | return syscall_has_error(regs) ? regs->regs[9] : 0; |
| 41 | } |
| 42 | |
| 43 | static inline long syscall_get_return_value(struct task_struct *task, |
| 44 | struct pt_regs *regs) |
| 45 | { |
| 46 | return regs->regs[9]; |
| 47 | } |
| 48 | |
| 49 | static inline void syscall_set_return_value(struct task_struct *task, |
| 50 | struct pt_regs *regs, |
| 51 | int error, long val) |
| 52 | { |
| 53 | if (error) { |
| 54 | syscall_set_error(regs); |
| 55 | regs->regs[9] = -error; |
| 56 | } else { |
| 57 | syscall_clear_error(regs); |
| 58 | regs->regs[9] = val; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | static inline void syscall_get_arguments(struct task_struct *task, |
| 63 | struct pt_regs *regs, |
| 64 | unsigned int i, unsigned int n, |
| 65 | unsigned long *args) |
| 66 | { |
| 67 | BUG_ON(i + n > 6); |
| 68 | memcpy(args, ®s->reg[2 + i], n * sizeof(args[0])); |
| 69 | } |
| 70 | |
| 71 | static inline void syscall_set_arguments(struct task_struct *task, |
| 72 | struct pt_regs *regs, |
| 73 | unsigned int i, unsigned int n, |
| 74 | const unsigned long *args) |
| 75 | { |
| 76 | BUG_ON(i + n > 6); |
| 77 | memcpy(®s->reg[2 + i], args, n * sizeof(args[0])); |
| 78 | } |
| Paul Mundt | fb4f87a | 2008-09-12 22:13:13 +0900 | [diff] [blame] | 79 | |
| 80 | #endif /* __ASM_SH_SYSCALL_64_H */ |