arch/h8300/kernel/ptrace_s.c

   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 }