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