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-rw-r--r--arch/ppc/kernel/ptrace.c507
1 files changed, 0 insertions, 507 deletions
diff --git a/arch/ppc/kernel/ptrace.c b/arch/ppc/kernel/ptrace.c
deleted file mode 100644
index e7aee4108de..00000000000
--- a/arch/ppc/kernel/ptrace.c
+++ /dev/null
@@ -1,507 +0,0 @@
-/*
- * arch/ppc/kernel/ptrace.c
- *
- * PowerPC version
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Derived from "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
- *
- * Modified by Cort Dougan (cort@hq.fsmlabs.com)
- * and Paul Mackerras (paulus@linuxcare.com.au).
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file README.legal 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/smp_lock.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/security.h>
-#include <linux/signal.h>
-#include <linux/seccomp.h>
-#include <linux/audit.h>
-#include <linux/module.h>
-
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-
-/*
- * Set of msr bits that gdb can change on behalf of a process.
- */
-#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
-#define MSR_DEBUGCHANGE 0
-#else
-#define MSR_DEBUGCHANGE (MSR_SE | MSR_BE)
-#endif
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
- * Get contents of register REGNO in task TASK.
- */
-static inline unsigned long get_reg(struct task_struct *task, int regno)
-{
- if (regno < sizeof(struct pt_regs) / sizeof(unsigned long)
- && task->thread.regs != NULL)
- return ((unsigned long *)task->thread.regs)[regno];
- return (0);
-}
-
-/*
- * Write contents of register REGNO in task TASK.
- */
-static inline int put_reg(struct task_struct *task, int regno,
- unsigned long data)
-{
- if (regno <= PT_MQ && task->thread.regs != NULL) {
- if (regno == PT_MSR)
- data = (data & MSR_DEBUGCHANGE)
- | (task->thread.regs->msr & ~MSR_DEBUGCHANGE);
- ((unsigned long *)task->thread.regs)[regno] = data;
- return 0;
- }
- return -EIO;
-}
-
-#ifdef CONFIG_ALTIVEC
-/*
- * Get contents of AltiVec register state in task TASK
- */
-static inline int get_vrregs(unsigned long __user *data, struct task_struct *task)
-{
- int i, j;
-
- if (!access_ok(VERIFY_WRITE, data, 133 * sizeof(unsigned long)))
- return -EFAULT;
-
- /* copy AltiVec registers VR[0] .. VR[31] */
- for (i = 0; i < 32; i++)
- for (j = 0; j < 4; j++, data++)
- if (__put_user(task->thread.vr[i].u[j], data))
- return -EFAULT;
-
- /* copy VSCR */
- for (i = 0; i < 4; i++, data++)
- if (__put_user(task->thread.vscr.u[i], data))
- return -EFAULT;
-
- /* copy VRSAVE */
- if (__put_user(task->thread.vrsave, data))
- return -EFAULT;
-
- return 0;
-}
-
-/*
- * Write contents of AltiVec register state into task TASK.
- */
-static inline int set_vrregs(struct task_struct *task, unsigned long __user *data)
-{
- int i, j;
-
- if (!access_ok(VERIFY_READ, data, 133 * sizeof(unsigned long)))
- return -EFAULT;
-
- /* copy AltiVec registers VR[0] .. VR[31] */
- for (i = 0; i < 32; i++)
- for (j = 0; j < 4; j++, data++)
- if (__get_user(task->thread.vr[i].u[j], data))
- return -EFAULT;
-
- /* copy VSCR */
- for (i = 0; i < 4; i++, data++)
- if (__get_user(task->thread.vscr.u[i], data))
- return -EFAULT;
-
- /* copy VRSAVE */
- if (__get_user(task->thread.vrsave, data))
- return -EFAULT;
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_SPE
-
-/*
- * For get_evrregs/set_evrregs functions 'data' has the following layout:
- *
- * struct {
- * u32 evr[32];
- * u64 acc;
- * u32 spefscr;
- * }
- */
-
-/*
- * Get contents of SPE register state in task TASK.
- */
-static inline int get_evrregs(unsigned long *data, struct task_struct *task)
-{
- int i;
-
- if (!access_ok(VERIFY_WRITE, data, 35 * sizeof(unsigned long)))
- return -EFAULT;
-
- /* copy SPEFSCR */
- if (__put_user(task->thread.spefscr, &data[34]))
- return -EFAULT;
-
- /* copy SPE registers EVR[0] .. EVR[31] */
- for (i = 0; i < 32; i++, data++)
- if (__put_user(task->thread.evr[i], data))
- return -EFAULT;
-
- /* copy ACC */
- if (__put_user64(task->thread.acc, (unsigned long long *)data))
- return -EFAULT;
-
- return 0;
-}
-
-/*
- * Write contents of SPE register state into task TASK.
- */
-static inline int set_evrregs(struct task_struct *task, unsigned long *data)
-{
- int i;
-
- if (!access_ok(VERIFY_READ, data, 35 * sizeof(unsigned long)))
- return -EFAULT;
-
- /* copy SPEFSCR */
- if (__get_user(task->thread.spefscr, &data[34]))
- return -EFAULT;
-
- /* copy SPE registers EVR[0] .. EVR[31] */
- for (i = 0; i < 32; i++, data++)
- if (__get_user(task->thread.evr[i], data))
- return -EFAULT;
- /* copy ACC */
- if (__get_user64(task->thread.acc, (unsigned long long*)data))
- return -EFAULT;
-
- return 0;
-}
-#endif /* CONFIG_SPE */
-
-static inline void
-set_single_step(struct task_struct *task)
-{
- struct pt_regs *regs = task->thread.regs;
-
- if (regs != NULL) {
-#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
- task->thread.dbcr0 = DBCR0_IDM | DBCR0_IC;
- regs->msr |= MSR_DE;
-#else
- regs->msr |= MSR_SE;
-#endif
- }
-}
-
-static inline void
-clear_single_step(struct task_struct *task)
-{
- struct pt_regs *regs = task->thread.regs;
-
- if (regs != NULL) {
-#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
- task->thread.dbcr0 = 0;
- regs->msr &= ~MSR_DE;
-#else
- regs->msr &= ~MSR_SE;
-#endif
- }
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* make sure the single step bit is not set. */
- clear_single_step(child);
-}
-
-int sys_ptrace(long request, long pid, long addr, long data)
-{
- struct task_struct *child;
- int ret = -EPERM;
-
- lock_kernel();
- if (request == PTRACE_TRACEME) {
- /* are we already being traced? */
- if (current->ptrace & PT_PTRACED)
- goto out;
- ret = security_ptrace(current->parent, current);
- if (ret)
- goto out;
- /* set the ptrace bit in the process flags. */
- current->ptrace |= PT_PTRACED;
- ret = 0;
- goto out;
- }
- ret = -ESRCH;
- read_lock(&tasklist_lock);
- child = find_task_by_pid(pid);
- if (child)
- get_task_struct(child);
- read_unlock(&tasklist_lock);
- if (!child)
- goto out;
-
- ret = -EPERM;
- if (pid == 1) /* you may not mess with init */
- goto out_tsk;
-
- if (request == PTRACE_ATTACH) {
- ret = ptrace_attach(child);
- goto out_tsk;
- }
-
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (ret < 0)
- goto out_tsk;
-
- switch (request) {
- /* when I and D space are separate, these will need to be fixed. */
- case PTRACE_PEEKTEXT: /* read word at location addr. */
- case PTRACE_PEEKDATA: {
- unsigned long tmp;
- int copied;
-
- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
- ret = -EIO;
- if (copied != sizeof(tmp))
- break;
- ret = put_user(tmp,(unsigned long __user *) data);
- break;
- }
-
- /* read the word at location addr in the USER area. */
- /* XXX this will need fixing for 64-bit */
- case PTRACE_PEEKUSR: {
- unsigned long index, tmp;
-
- ret = -EIO;
- /* convert to index and check */
- index = (unsigned long) addr >> 2;
- if ((addr & 3) || index > PT_FPSCR
- || child->thread.regs == NULL)
- break;
-
- CHECK_FULL_REGS(child->thread.regs);
- if (index < PT_FPR0) {
- tmp = get_reg(child, (int) index);
- } else {
- preempt_disable();
- if (child->thread.regs->msr & MSR_FP)
- giveup_fpu(child);
- preempt_enable();
- tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
- }
- ret = put_user(tmp,(unsigned long __user *) data);
- break;
- }
-
- /* If I and D space are separate, this will have to be fixed. */
- case PTRACE_POKETEXT: /* write the word at location addr. */
- case PTRACE_POKEDATA:
- ret = 0;
- if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
- break;
- ret = -EIO;
- break;
-
- /* write the word at location addr in the USER area */
- case PTRACE_POKEUSR: {
- unsigned long index;
-
- ret = -EIO;
- /* convert to index and check */
- index = (unsigned long) addr >> 2;
- if ((addr & 3) || index > PT_FPSCR
- || child->thread.regs == NULL)
- break;
-
- CHECK_FULL_REGS(child->thread.regs);
- if (index == PT_ORIG_R3)
- break;
- if (index < PT_FPR0) {
- ret = put_reg(child, index, data);
- } else {
- preempt_disable();
- if (child->thread.regs->msr & MSR_FP)
- giveup_fpu(child);
- preempt_enable();
- ((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
- ret = 0;
- }
- break;
- }
-
- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: { /* restart after signal. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- if (request == PTRACE_SYSCALL) {
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- } else {
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- }
- child->exit_code = data;
- /* make sure the single step bit is not set. */
- clear_single_step(child);
- wake_up_process(child);
- ret = 0;
- break;
- }
-
-/*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
- case PTRACE_KILL: {
- ret = 0;
- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
- break;
- child->exit_code = SIGKILL;
- /* make sure the single step bit is not set. */
- clear_single_step(child);
- wake_up_process(child);
- break;
- }
-
- case PTRACE_SINGLESTEP: { /* set the trap flag. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- set_single_step(child);
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- ret = 0;
- break;
- }
-
- case PTRACE_DETACH:
- ret = ptrace_detach(child, data);
- break;
-
-#ifdef CONFIG_ALTIVEC
- case PTRACE_GETVRREGS:
- /* Get the child altivec register state. */
- preempt_disable();
- if (child->thread.regs->msr & MSR_VEC)
- giveup_altivec(child);
- preempt_enable();
- ret = get_vrregs((unsigned long __user *)data, child);
- break;
-
- case PTRACE_SETVRREGS:
- /* Set the child altivec register state. */
- /* this is to clear the MSR_VEC bit to force a reload
- * of register state from memory */
- preempt_disable();
- if (child->thread.regs->msr & MSR_VEC)
- giveup_altivec(child);
- preempt_enable();
- ret = set_vrregs(child, (unsigned long __user *)data);
- break;
-#endif
-#ifdef CONFIG_SPE
- case PTRACE_GETEVRREGS:
- /* Get the child spe register state. */
- if (child->thread.regs->msr & MSR_SPE)
- giveup_spe(child);
- ret = get_evrregs((unsigned long __user *)data, child);
- break;
-
- case PTRACE_SETEVRREGS:
- /* Set the child spe register state. */
- /* this is to clear the MSR_SPE bit to force a reload
- * of register state from memory */
- if (child->thread.regs->msr & MSR_SPE)
- giveup_spe(child);
- ret = set_evrregs(child, (unsigned long __user *)data);
- break;
-#endif
-
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
-out_tsk:
- put_task_struct(child);
-out:
- unlock_kernel();
- return ret;
-}
-
-static void do_syscall_trace(void)
-{
- /* the 0x80 provides a way for the tracing parent to distinguish
- between a syscall stop and SIGTRAP delivery */
- 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;
- }
-}
-
-void do_syscall_trace_enter(struct pt_regs *regs)
-{
- if (test_thread_flag(TIF_SYSCALL_TRACE)
- && (current->ptrace & PT_PTRACED))
- do_syscall_trace();
-
- if (unlikely(current->audit_context))
- audit_syscall_entry(current, AUDIT_ARCH_PPC,
- regs->gpr[0],
- regs->gpr[3], regs->gpr[4],
- regs->gpr[5], regs->gpr[6]);
-}
-
-void do_syscall_trace_leave(struct pt_regs *regs)
-{
- secure_computing(regs->gpr[0]);
-
- if (unlikely(current->audit_context))
- audit_syscall_exit(current,
- (regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
- regs->result);
-
- if ((test_thread_flag(TIF_SYSCALL_TRACE))
- && (current->ptrace & PT_PTRACED))
- do_syscall_trace();
-}
-
-EXPORT_SYMBOL(do_syscall_trace_enter);
-EXPORT_SYMBOL(do_syscall_trace_leave);
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