169 lines
3.8 KiB
C
169 lines
3.8 KiB
C
/*
|
|
* 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, long addr, long data)
|
|
{
|
|
int ret;
|
|
|
|
switch (request) {
|
|
/* read the word at location addr in the USER area. */
|
|
case PTRACE_PEEKUSR: {
|
|
unsigned long tmp = 0;
|
|
|
|
if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
|
|
ret = -EIO;
|
|
break ;
|
|
}
|
|
|
|
ret = 0; /* Default return condition */
|
|
addr = addr >> 2; /* temporary hack. */
|
|
|
|
if (addr < H8300_REGS_NO)
|
|
tmp = h8300_get_reg(child, addr);
|
|
else {
|
|
switch(addr) {
|
|
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,(unsigned long *) data);
|
|
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 < 0 || addr >= sizeof(struct user)) {
|
|
ret = -EIO;
|
|
break ;
|
|
}
|
|
addr = addr >> 2; /* temporary hack. */
|
|
|
|
if (addr == PT_ORIG_ER0) {
|
|
ret = -EIO;
|
|
break ;
|
|
}
|
|
if (addr < H8300_REGS_NO) {
|
|
ret = h8300_put_reg(child, addr, 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, (unsigned long *) data)) {
|
|
ret = -EFAULT;
|
|
break;
|
|
}
|
|
data += sizeof(long);
|
|
}
|
|
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, (unsigned long *) data)) {
|
|
ret = -EFAULT;
|
|
break;
|
|
}
|
|
h8300_put_reg(child, i, tmp);
|
|
data += sizeof(long);
|
|
}
|
|
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;
|
|
}
|
|
}
|