[mirror_ubuntu-zesty-kernel.git] / arch / h8300 / kernel / ptrace_s.c

/*
 *  linux/arch/h8300/kernel/ptrace_h8s.c
 *    ptrace cpu depend helper functions
 *
 *  Yoshinori Sato <ysato@users.sourceforge.jp>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file COPYING in the main directory of
 * this archive for more details.
 */

#include <linux/linkage.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <asm/ptrace.h>

#define CCR_MASK  0x6f
#define EXR_TRACE 0x80

/* disable singlestep */
void user_disable_single_step(struct task_struct *child)
{
	unsigned char exr;

	exr = h8300_get_reg(child, PT_EXR);
	exr &= ~EXR_TRACE;
	h8300_put_reg(child, PT_EXR, exr);
}

/* enable singlestep */
void user_enable_single_step(struct task_struct *child)
{
	unsigned char exr;

	exr = h8300_get_reg(child, PT_EXR);
	exr |= EXR_TRACE;
	h8300_put_reg(child, PT_EXR, exr);
}

asmlinkage void trace_trap(unsigned long bp)
{
	(void)bp;
	force_sig(SIGTRAP, current);
}
Commit	Line	Data
fe54616d YS	1	/*
	2	* linux/arch/h8300/kernel/ptrace_h8s.c
	3	* ptrace cpu depend helper functions
	4	*
	5	* Yoshinori Sato <ysato@users.sourceforge.jp>
	6	*
	7	* This file is subject to the terms and conditions of the GNU General
	8	* Public License. See the file COPYING in the main directory of
	9	* this archive for more details.
	10	*/
	11
	12	#include <linux/linkage.h>
	13	#include <linux/sched.h>
	14	#include <linux/errno.h>
	15	#include <asm/ptrace.h>
	16
	17	#define CCR_MASK 0x6f
	18	#define EXR_TRACE 0x80
	19
	20	/* disable singlestep */
	21	void user_disable_single_step(struct task_struct *child)
	22	{
	23	unsigned char exr;
	24
	25	exr = h8300_get_reg(child, PT_EXR);
	26	exr &= ~EXR_TRACE;
	27	h8300_put_reg(child, PT_EXR, exr);
	28	}
	29
	30	/* enable singlestep */
	31	void user_enable_single_step(struct task_struct *child)
	32	{
	33	unsigned char exr;
	34
	35	exr = h8300_get_reg(child, PT_EXR);
	36	exr \|= EXR_TRACE;
	37	h8300_put_reg(child, PT_EXR, exr);
	38	}
	39
	40	asmlinkage void trace_trap(unsigned long bp)
	41	{
	42	(void)bp;
	43	force_sig(SIGTRAP, current);
	44	}