81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
#ifndef __ASM_SH_SYSCALL_64_H
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#define __ASM_SH_SYSCALL_64_H
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <asm/ptrace.h>
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/* The system call number is given by the user in R9 */
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static inline long syscall_get_nr(struct task_struct *task,
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struct pt_regs *regs)
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{
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return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
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}
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static inline void syscall_rollback(struct task_struct *task,
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struct pt_regs *regs)
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{
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/*
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* XXX: This needs some thought. On SH we don't
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* save away the original R9 value anywhere.
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*/
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}
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static inline bool syscall_has_error(struct pt_regs *regs)
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{
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return (regs->sr & 0x1) ? true : false;
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}
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static inline void syscall_set_error(struct pt_regs *regs)
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{
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regs->sr |= 0x1;
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}
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static inline void syscall_clear_error(struct pt_regs *regs)
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{
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regs->sr &= ~0x1;
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}
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static inline long syscall_get_error(struct task_struct *task,
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struct pt_regs *regs)
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{
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return syscall_has_error(regs) ? regs->regs[9] : 0;
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}
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static inline long syscall_get_return_value(struct task_struct *task,
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struct pt_regs *regs)
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{
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return regs->regs[9];
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}
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static inline void syscall_set_return_value(struct task_struct *task,
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struct pt_regs *regs,
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int error, long val)
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{
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if (error) {
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syscall_set_error(regs);
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regs->regs[9] = -error;
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} else {
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syscall_clear_error(regs);
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regs->regs[9] = val;
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}
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}
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static inline void syscall_get_arguments(struct task_struct *task,
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struct pt_regs *regs,
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unsigned int i, unsigned int n,
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unsigned long *args)
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{
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BUG_ON(i + n > 6);
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memcpy(args, ®s->regs[2 + i], n * sizeof(args[0]));
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}
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static inline void syscall_set_arguments(struct task_struct *task,
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struct pt_regs *regs,
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unsigned int i, unsigned int n,
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const unsigned long *args)
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{
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BUG_ON(i + n > 6);
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memcpy(®s->regs[2 + i], args, n * sizeof(args[0]));
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}
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#endif /* __ASM_SH_SYSCALL_64_H */
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