sh: Provide the asm/syscall.h interface, needed by tracehook.

#ifndef __ASM_SH_SYSCALL_H

#define __ASM_SH_SYSCALL_H

#ifdef CONFIG_SUPERH32

# include "syscall_32.h"

#else

# include "syscall_64.h"

#endif

#endif /* __ASM_SH_SYSCALL_H */

#ifndef __ASM_SH_SYSCALL_32_H

#define __ASM_SH_SYSCALL_32_H

#include <linux/kernel.h>

#include <linux/sched.h>

#include <asm/ptrace.h>

/* The system call number is given by the user in %g1 */

static inline long syscall_get_nr(struct task_struct *task,

				  struct pt_regs *regs)

{

	return (regs->tra >= 0) ? regs->regs[3] : -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 r0 value anywhere.

	 */

}

static inline bool syscall_has_error(struct pt_regs *regs)

{

	return (regs->sr & 0x1) ? true : false;

}

static inline void syscall_set_error(struct pt_regs *regs)

{

	regs->sr |= 0x1;

}

static inline void syscall_clear_error(struct pt_regs *regs)

{

	regs->sr &= ~0x1;

}

static inline long syscall_get_error(struct task_struct *task,

				     struct pt_regs *regs)

{

	return syscall_has_error(regs) ? regs->regs[0] : 0;

}

static inline long syscall_get_return_value(struct task_struct *task,

					    struct pt_regs *regs)

{

	return regs->regs[0];

}

static inline void syscall_set_return_value(struct task_struct *task,

					    struct pt_regs *regs,

					    int error, long val)

{

	if (error) {

		syscall_set_error(regs);

		regs->regs[0] = -error;

	} else {

		syscall_clear_error(regs);

		regs->regs[0] = val;

	}

}

static inline void syscall_get_arguments(struct task_struct *task,

					 struct pt_regs *regs,

					 unsigned int i, unsigned int n,

					 unsigned long *args)

{

	/*

	 * Do this simply for now. If we need to start supporting

	 * fetching arguments from arbitrary indices, this will need some

	 * extra logic. Presently there are no in-tree users that depend

	 * on this behaviour.

	 */

	BUG_ON(i);

	/* Argument pattern is: R4, R5, R6, R7, R0, R1 */

	switch (n) {

	case 6: args[5] = regs->regs[1];

	case 5: args[4] = regs->regs[0];

	case 4: args[3] = regs->regs[7];

	case 3: args[2] = regs->regs[6];

	case 2: args[1] = regs->regs[5];

	case 1:	args[0] = regs->regs[4];

		break;

	default:

		BUG();

	}

}

static inline void syscall_set_arguments(struct task_struct *task,

					 struct pt_regs *regs,

					 unsigned int i, unsigned int n,

					 const unsigned long *args)

{

	/* Same note as above applies */

	BUG_ON(i);

	switch (n) {

	case 6: regs->regs[1] = args[5];

	case 5: regs->regs[0] = args[4];

	case 4: regs->regs[7] = args[3];

	case 3: regs->regs[6] = args[2];

	case 2: regs->regs[5] = args[1];

	case 1: regs->regs[4] = args[0];

		break;

	default:

		BUG();

	}

}

#endif /* __ASM_SH_SYSCALL_32_H */

#ifndef __ASM_SH_SYSCALL_64_H

#define __ASM_SH_SYSCALL_64_H

#include <asm-generic/syscall.h>

#endif /* __ASM_SH_SYSCALL_64_H */