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/*
* linux/arch/h8300/kernel/ptrace.c
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
*
* Based on:
* linux/arch/m68k/kernel/ptrace.c
*
* Copyright (C) 1994 by Hamish Macdonald
* Taken from linux/kernel/ptrace.c and modified for M680x0.
* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
*
* 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/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/signal.h>
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/signal.h>
/* cpu depend functions */
extern long h8300_get_reg(struct task_struct *task, int regno);
extern int h8300_put_reg(struct task_struct *task, int regno, unsigned long data);
void user_disable_single_step(struct task_struct *child)
{
}
/*
* does not yet catch signals sent when the child dies.
* in exit.c or in signal.c.
*/
void ptrace_disable(struct task_struct *child)
{
user_disable_single_step(child);
}
long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
int ret;
int regno = addr >> 2;
unsigned long __user *datap = (unsigned long __user *) data;
switch (request) {
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
unsigned long tmp = 0;
if ((addr & 3) || addr >= sizeof(struct user)) {
ret = -EIO;
break ;
}
ret = 0; /* Default return condition */
if (regno < H8300_REGS_NO)
tmp = h8300_get_reg(child, regno);
else {
switch (regno) {
case 49:
tmp = child->mm->start_code;
break ;
case 50:
tmp = child->mm->start_data;
break ;
case 51:
tmp = child->mm->end_code;
break ;
case 52:
tmp = child->mm->end_data;
break ;
default:
ret = -EIO;
}
}
if (!ret)
ret = put_user(tmp, datap);
break ;
}
/* when I and D space are separate, this will have to be fixed. */
case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
if ((addr & 3) || addr >= sizeof(struct user)) {
ret = -EIO;
break ;
}
if (regno == PT_ORIG_ER0) {
ret = -EIO;
break ;
}
if (regno < H8300_REGS_NO) {
ret = h8300_put_reg(child, regno, data);
break ;
}
ret = -EIO;
break ;
case PTRACE_GETREGS: { /* Get all gp regs from the child. */
int i;
unsigned long tmp;
for (i = 0; i < H8300_REGS_NO; i++) {
tmp = h8300_get_reg(child, i);
if (put_user(tmp, datap)) {
ret = -EFAULT;
break;
}
datap++;
}
ret = 0;
break;
}
case PTRACE_SETREGS: { /* Set all gp regs in the child. */
int i;
unsigned long tmp;
for (i = 0; i < H8300_REGS_NO; i++) {
if (get_user(tmp, datap)) {
ret = -EFAULT;
break;
}
h8300_put_reg(child, i, tmp);
datap++;
}
ret = 0;
break;
}
default:
ret = ptrace_request(child, request, addr, data);
break;
}
return ret;
}
asmlinkage void do_syscall_trace(void)
{
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
if (!(current->ptrace & PT_PTRACED))
return;
ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
? 0x80 : 0));
/*
* this isn't the same as continuing with a signal, but it will do
* for normal use. strace only continues with a signal if the
* stopping signal is not SIGTRAP. -brl
*/
if (current->exit_code) {
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
}
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