1 #ifndef __ASM_SH_SYSCALL_32_H
2 #define __ASM_SH_SYSCALL_32_H
4 #include <linux/kernel.h>
5 #include <linux/sched.h>
6 #include <asm/ptrace.h>
8 /* The system call number is given by the user in %g1 */
9 static inline long syscall_get_nr(struct task_struct *task,
12 return (regs->tra >= 0) ? regs->regs[3] : -1L;
15 static inline void syscall_rollback(struct task_struct *task,
19 * XXX: This needs some thought. On SH we don't
20 * save away the original r0 value anywhere.
24 static inline bool syscall_has_error(struct pt_regs *regs)
26 return (regs->sr & 0x1) ? true : false;
28 static inline void syscall_set_error(struct pt_regs *regs)
32 static inline void syscall_clear_error(struct pt_regs *regs)
37 static inline long syscall_get_error(struct task_struct *task,
40 return syscall_has_error(regs) ? regs->regs[0] : 0;
43 static inline long syscall_get_return_value(struct task_struct *task,
49 static inline void syscall_set_return_value(struct task_struct *task,
54 syscall_set_error(regs);
55 regs->regs[0] = -error;
57 syscall_clear_error(regs);
62 static inline void syscall_get_arguments(struct task_struct *task,
64 unsigned int i, unsigned int n,
68 * Do this simply for now. If we need to start supporting
69 * fetching arguments from arbitrary indices, this will need some
70 * extra logic. Presently there are no in-tree users that depend
75 /* Argument pattern is: R4, R5, R6, R7, R0, R1 */
77 case 6: args[5] = regs->regs[1];
78 case 5: args[4] = regs->regs[0];
79 case 4: args[3] = regs->regs[7];
80 case 3: args[2] = regs->regs[6];
81 case 2: args[1] = regs->regs[5];
82 case 1: args[0] = regs->regs[4];
89 static inline void syscall_set_arguments(struct task_struct *task,
91 unsigned int i, unsigned int n,
92 const unsigned long *args)
94 /* Same note as above applies */
98 case 6: regs->regs[1] = args[5];
99 case 5: regs->regs[0] = args[4];
100 case 4: regs->regs[7] = args[3];
101 case 3: regs->regs[6] = args[2];
102 case 2: regs->regs[5] = args[1];
103 case 1: regs->regs[4] = args[0];
110 #endif /* __ASM_SH_SYSCALL_32_H */