1 #ifndef __ASM_SH_SYSCALL_32_H
2 #define __ASM_SH_SYSCALL_32_H
4 #include <linux/kernel.h>
5 #include <linux/sched.h>
7 #include <asm/ptrace.h>
9 /* The system call number is given by the user in R3 */
10 static inline long syscall_get_nr(struct task_struct *task,
13 return (regs->tra >= 0) ? regs->regs[3] : -1L;
16 static inline void syscall_rollback(struct task_struct *task,
20 * XXX: This needs some thought. On SH we don't
21 * save away the original r0 value anywhere.
25 static inline long syscall_get_error(struct task_struct *task,
28 return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0;
31 static inline long syscall_get_return_value(struct task_struct *task,
37 static inline void syscall_set_return_value(struct task_struct *task,
42 regs->regs[0] = -error;
47 static inline void syscall_get_arguments(struct task_struct *task,
49 unsigned int i, unsigned int n,
53 * Do this simply for now. If we need to start supporting
54 * fetching arguments from arbitrary indices, this will need some
55 * extra logic. Presently there are no in-tree users that depend
60 /* Argument pattern is: R4, R5, R6, R7, R0, R1 */
62 case 6: args[5] = regs->regs[1];
63 case 5: args[4] = regs->regs[0];
64 case 4: args[3] = regs->regs[7];
65 case 3: args[2] = regs->regs[6];
66 case 2: args[1] = regs->regs[5];
67 case 1: args[0] = regs->regs[4];
75 static inline void syscall_set_arguments(struct task_struct *task,
77 unsigned int i, unsigned int n,
78 const unsigned long *args)
80 /* Same note as above applies */
84 case 6: regs->regs[1] = args[5];
85 case 5: regs->regs[0] = args[4];
86 case 4: regs->regs[7] = args[3];
87 case 3: regs->regs[6] = args[2];
88 case 2: regs->regs[5] = args[1];
89 case 1: regs->regs[4] = args[0];
96 #endif /* __ASM_SH_SYSCALL_32_H */