2 * linux/arch/h8300/kernel/ptrace.c
4 * Yoshinori Sato <ysato@users.sourceforge.jp>
7 * linux/arch/m68k/kernel/ptrace.c
9 * Copyright (C) 1994 by Hamish Macdonald
10 * Taken from linux/kernel/ptrace.c and modified for M680x0.
11 * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
13 * This file is subject to the terms and conditions of the GNU General
14 * Public License. See the file COPYING in the main directory of
15 * this archive for more details.
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
21 #include <linux/smp.h>
22 #include <linux/errno.h>
23 #include <linux/ptrace.h>
24 #include <linux/user.h>
25 #include <linux/signal.h>
27 #include <asm/uaccess.h>
29 #include <asm/pgtable.h>
30 #include <asm/system.h>
31 #include <asm/processor.h>
32 #include <asm/signal.h>
34 /* cpu depend functions */
35 extern long h8300_get_reg(struct task_struct *task, int regno);
36 extern int h8300_put_reg(struct task_struct *task, int regno, unsigned long data);
39 void user_disable_single_step(struct task_struct *child)
44 * does not yet catch signals sent when the child dies.
45 * in exit.c or in signal.c.
48 void ptrace_disable(struct task_struct *child)
50 user_disable_single_step(child);
53 long arch_ptrace(struct task_struct *child, long request, long addr, long data)
58 /* read the word at location addr in the USER area. */
59 case PTRACE_PEEKUSR: {
60 unsigned long tmp = 0;
62 if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
67 ret = 0; /* Default return condition */
68 addr = addr >> 2; /* temporary hack. */
70 if (addr < H8300_REGS_NO)
71 tmp = h8300_get_reg(child, addr);
75 tmp = child->mm->start_code;
78 tmp = child->mm->start_data;
81 tmp = child->mm->end_code;
84 tmp = child->mm->end_data;
91 ret = put_user(tmp,(unsigned long *) data);
95 /* when I and D space are separate, this will have to be fixed. */
96 case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
97 if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
101 addr = addr >> 2; /* temporary hack. */
103 if (addr == PT_ORIG_ER0) {
107 if (addr < H8300_REGS_NO) {
108 ret = h8300_put_reg(child, addr, data);
114 case PTRACE_GETREGS: { /* Get all gp regs from the child. */
117 for (i = 0; i < H8300_REGS_NO; i++) {
118 tmp = h8300_get_reg(child, i);
119 if (put_user(tmp, (unsigned long *) data)) {
123 data += sizeof(long);
129 case PTRACE_SETREGS: { /* Set all gp regs in the child. */
132 for (i = 0; i < H8300_REGS_NO; i++) {
133 if (get_user(tmp, (unsigned long *) data)) {
137 h8300_put_reg(child, i, tmp);
138 data += sizeof(long);
145 ret = ptrace_request(child, request, addr, data);
151 asmlinkage void do_syscall_trace(void)
153 if (!test_thread_flag(TIF_SYSCALL_TRACE))
155 if (!(current->ptrace & PT_PTRACED))
157 ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
160 * this isn't the same as continuing with a signal, but it will do
161 * for normal use. strace only continues with a signal if the
162 * stopping signal is not SIGTRAP. -brl
164 if (current->exit_code) {
165 send_sig(current->exit_code, current, 1);
166 current->exit_code = 0;