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/signal.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 */
user_disable_single_step(struct task_struct * child)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 */
user_enable_single_step(struct task_struct * child)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 
trace_trap(unsigned long bp)40 asmlinkage void trace_trap(unsigned long bp)
41 {
42 	(void)bp;
43 	force_sig(SIGTRAP, current);
44 }
45