syscall_64.h

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#ifndef __ASM_SH_SYSCALL_64_H
#define __ASM_SH_SYSCALL_64_H

#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/ptrace.h>

/* The system call number is given by the user in R9 */
static inline long syscall_get_nr(struct task_struct *task,
                  struct pt_regs *regs)
{
    return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
}

static inline void syscall_rollback(struct task_struct *task,
                    struct pt_regs *regs)
{
    /*
     * XXX: This needs some thought. On SH we don't
     * save away the original R9 value anywhere.
     */
}

static inline long syscall_get_error(struct task_struct *task,
                     struct pt_regs *regs)
{
    return IS_ERR_VALUE(regs->regs[9]) ? regs->regs[9] : 0;
}

static inline long syscall_get_return_value(struct task_struct *task,
                        struct pt_regs *regs)
{
    return regs->regs[9];
}

static inline void syscall_set_return_value(struct task_struct *task,
                        struct pt_regs *regs,
                        int error, long val)
{
    if (error)
        regs->regs[9] = -error;
    else
        regs->regs[9] = val;
}

static inline void syscall_get_arguments(struct task_struct *task,
                     struct pt_regs *regs,
                     unsigned int i, unsigned int n,
                     unsigned long *args)
{
    BUG_ON(i + n > 6);
    memcpy(args, &regs->regs[2 + i], n * sizeof(args[0]));
}

static inline void syscall_set_arguments(struct task_struct *task,
                     struct pt_regs *regs,
                     unsigned int i, unsigned int n,
                     const unsigned long *args)
{
    BUG_ON(i + n > 6);
    memcpy(&regs->regs[2 + i], args, n * sizeof(args[0]));
}

#endif /* __ASM_SH_SYSCALL_64_H */