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@@ -1,363 +0,0 @@
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-/*
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- * linux/arch/ppc64/kernel/ptrace.c
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- *
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- * PowerPC version
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- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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- *
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- * Derived from "arch/m68k/kernel/ptrace.c"
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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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- * Modified by Cort Dougan (cort@hq.fsmlabs.com)
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- * and Paul Mackerras (paulus@linuxcare.com.au).
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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 README.legal in the main directory of
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- * this archive for more details.
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- */
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-
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-#include <linux/config.h>
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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/smp_lock.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/security.h>
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-#include <linux/audit.h>
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-#include <linux/seccomp.h>
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-#include <linux/signal.h>
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-
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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/system.h>
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-#include <asm/ptrace-common.h>
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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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-
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-/*
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- * Called by kernel/ptrace.c when detaching..
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- *
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- * Make sure single step bits etc are not set.
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- */
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-void ptrace_disable(struct task_struct *child)
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-{
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- /* make sure the single step bit is not set. */
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- clear_single_step(child);
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-}
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-
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-int sys_ptrace(long request, long pid, long addr, long data)
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-{
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- struct task_struct *child;
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- int ret = -EPERM;
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-
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- lock_kernel();
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- if (request == PTRACE_TRACEME) {
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- /* are we already being traced? */
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- if (current->ptrace & PT_PTRACED)
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- goto out;
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- ret = security_ptrace(current->parent, current);
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- if (ret)
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- goto out;
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- /* set the ptrace bit in the process flags. */
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- current->ptrace |= PT_PTRACED;
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- ret = 0;
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- goto out;
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- }
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- ret = -ESRCH;
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- read_lock(&tasklist_lock);
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- child = find_task_by_pid(pid);
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- if (child)
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- get_task_struct(child);
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- read_unlock(&tasklist_lock);
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- if (!child)
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- goto out;
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-
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- ret = -EPERM;
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- if (pid == 1) /* you may not mess with init */
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- goto out_tsk;
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-
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- if (request == PTRACE_ATTACH) {
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- ret = ptrace_attach(child);
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- goto out_tsk;
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- }
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-
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- ret = ptrace_check_attach(child, request == PTRACE_KILL);
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- if (ret < 0)
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- goto out_tsk;
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-
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- switch (request) {
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- /* when I and D space are separate, these will need to be fixed. */
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- case PTRACE_PEEKTEXT: /* read word at location addr. */
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- case PTRACE_PEEKDATA: {
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- unsigned long tmp;
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- int copied;
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-
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- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
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- ret = -EIO;
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- if (copied != sizeof(tmp))
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- break;
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- ret = put_user(tmp,(unsigned long __user *) data);
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- break;
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- }
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-
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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 index;
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- unsigned long tmp;
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-
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- ret = -EIO;
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- /* convert to index and check */
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- index = (unsigned long) addr >> 3;
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- if ((addr & 7) || (index > PT_FPSCR))
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- break;
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-
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- if (index < PT_FPR0) {
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- tmp = get_reg(child, (int)index);
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- } else {
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- flush_fp_to_thread(child);
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- tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
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- }
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- ret = put_user(tmp,(unsigned long __user *) data);
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- break;
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- }
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-
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- /* If I and D space are separate, this will have to be fixed. */
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- case PTRACE_POKETEXT: /* write the word at location addr. */
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- case PTRACE_POKEDATA:
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- ret = 0;
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- if (access_process_vm(child, addr, &data, sizeof(data), 1)
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- == sizeof(data))
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- break;
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- ret = -EIO;
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- break;
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-
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- /* write the word at location addr in the USER area */
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- case PTRACE_POKEUSR: {
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- unsigned long index;
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-
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- ret = -EIO;
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- /* convert to index and check */
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- index = (unsigned long) addr >> 3;
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- if ((addr & 7) || (index > PT_FPSCR))
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- break;
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-
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- if (index == PT_ORIG_R3)
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- break;
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- if (index < PT_FPR0) {
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- ret = put_reg(child, index, data);
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- } else {
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- flush_fp_to_thread(child);
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- ((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
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- ret = 0;
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- }
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- break;
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- }
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-
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- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
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- case PTRACE_CONT: { /* restart after signal. */
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- ret = -EIO;
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- if (!valid_signal(data))
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- break;
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- if (request == PTRACE_SYSCALL)
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- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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- else
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- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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- child->exit_code = data;
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- /* make sure the single step bit is not set. */
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- clear_single_step(child);
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- wake_up_process(child);
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- ret = 0;
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- break;
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- }
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-
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- /*
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- * make the child exit. Best I can do is send it a sigkill.
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- * perhaps it should be put in the status that it wants to
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- * exit.
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- */
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- case PTRACE_KILL: {
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- ret = 0;
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- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
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- break;
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- child->exit_code = SIGKILL;
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- /* make sure the single step bit is not set. */
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- clear_single_step(child);
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- wake_up_process(child);
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- break;
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- }
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-
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- case PTRACE_SINGLESTEP: { /* set the trap flag. */
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- ret = -EIO;
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- if (!valid_signal(data))
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- break;
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- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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- set_single_step(child);
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- child->exit_code = data;
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- /* give it a chance to run. */
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- wake_up_process(child);
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- ret = 0;
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- break;
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- }
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-
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- case PTRACE_GET_DEBUGREG: {
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- ret = -EINVAL;
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- /* We only support one DABR and no IABRS at the moment */
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- if (addr > 0)
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- break;
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- ret = put_user(child->thread.dabr,
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- (unsigned long __user *)data);
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- break;
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- }
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-
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- case PTRACE_SET_DEBUGREG:
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- ret = ptrace_set_debugreg(child, addr, data);
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- break;
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-
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- case PTRACE_DETACH:
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- ret = ptrace_detach(child, data);
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- break;
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-
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- case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
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- int i;
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- unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
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- unsigned long __user *tmp = (unsigned long __user *)addr;
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-
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- for (i = 0; i < 32; i++) {
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- ret = put_user(*reg, tmp);
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- if (ret)
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- break;
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- reg++;
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- tmp++;
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- }
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- break;
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- }
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-
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- case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
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- int i;
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- unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
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- unsigned long __user *tmp = (unsigned long __user *)addr;
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-
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- for (i = 0; i < 32; i++) {
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- ret = get_user(*reg, tmp);
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- if (ret)
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- break;
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- reg++;
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- tmp++;
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- }
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- break;
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- }
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-
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- case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
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- int i;
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- unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
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- unsigned long __user *tmp = (unsigned long __user *)addr;
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-
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- flush_fp_to_thread(child);
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-
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- for (i = 0; i < 32; i++) {
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- ret = put_user(*reg, tmp);
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- if (ret)
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- break;
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- reg++;
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- tmp++;
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- }
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- break;
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- }
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-
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- case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
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- int i;
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- unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
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- unsigned long __user *tmp = (unsigned long __user *)addr;
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-
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- flush_fp_to_thread(child);
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-
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- for (i = 0; i < 32; i++) {
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- ret = get_user(*reg, tmp);
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- if (ret)
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- break;
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- reg++;
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- tmp++;
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- }
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- break;
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- }
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-
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-#ifdef CONFIG_ALTIVEC
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- case PTRACE_GETVRREGS:
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- /* Get the child altivec register state. */
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- flush_altivec_to_thread(child);
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- ret = get_vrregs((unsigned long __user *)data, child);
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- break;
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-
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- case PTRACE_SETVRREGS:
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- /* Set the child altivec register state. */
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- flush_altivec_to_thread(child);
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- ret = set_vrregs(child, (unsigned long __user *)data);
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- break;
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-#endif
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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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-out_tsk:
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- put_task_struct(child);
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-out:
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- unlock_kernel();
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- return ret;
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-}
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-
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-static void do_syscall_trace(void)
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-{
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- /* the 0x80 provides a way for the tracing parent to distinguish
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- between a syscall stop and SIGTRAP delivery */
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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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- /*
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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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-
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-void do_syscall_trace_enter(struct pt_regs *regs)
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-{
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- secure_computing(regs->gpr[0]);
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-
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- if (test_thread_flag(TIF_SYSCALL_TRACE)
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- && (current->ptrace & PT_PTRACED))
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- do_syscall_trace();
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-
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- if (unlikely(current->audit_context))
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- audit_syscall_entry(current,
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- test_thread_flag(TIF_32BIT)?AUDIT_ARCH_PPC:AUDIT_ARCH_PPC64,
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- regs->gpr[0],
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- regs->gpr[3], regs->gpr[4],
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- regs->gpr[5], regs->gpr[6]);
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-
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-}
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-
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-void do_syscall_trace_leave(struct pt_regs *regs)
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-{
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- if (unlikely(current->audit_context))
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- audit_syscall_exit(current,
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- (regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
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- regs->result);
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-
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- if ((test_thread_flag(TIF_SYSCALL_TRACE)
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- || test_thread_flag(TIF_SINGLESTEP))
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- && (current->ptrace & PT_PTRACED))
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- do_syscall_trace();
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-}
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Stephen Rothwell