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Diffstat (limited to 'arch/m68knommu/kernel/ptrace.c')
-rw-r--r--arch/m68knommu/kernel/ptrace.c334
1 files changed, 0 insertions, 334 deletions
diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c
deleted file mode 100644
index ef70ca070ce..00000000000
--- a/arch/m68knommu/kernel/ptrace.c
+++ /dev/null
@@ -1,334 +0,0 @@
-/*
- * linux/arch/m68knommu/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>
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/* determines which bits in the SR the user has access to. */
-/* 1 = access 0 = no access */
-#define SR_MASK 0x001f
-
-/* sets the trace bits. */
-#define TRACE_BITS 0x8000
-
-/* Find the stack offset for a register, relative to thread.esp0. */
-#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg)
-#define SW_REG(reg) ((long)&((struct switch_stack *)0)->reg \
- - sizeof(struct switch_stack))
-/* Mapping from PT_xxx to the stack offset at which the register is
- saved. Notice that usp has no stack-slot and needs to be treated
- specially (see get_reg/put_reg below). */
-static int regoff[] = {
- PT_REG(d1), PT_REG(d2), PT_REG(d3), PT_REG(d4),
- PT_REG(d5), SW_REG(d6), SW_REG(d7), PT_REG(a0),
- PT_REG(a1), PT_REG(a2), SW_REG(a3), SW_REG(a4),
- SW_REG(a5), SW_REG(a6), PT_REG(d0), -1,
- PT_REG(orig_d0), PT_REG(sr), PT_REG(pc),
-};
-
-/*
- * Get contents of register REGNO in task TASK.
- */
-static inline long get_reg(struct task_struct *task, int regno)
-{
- unsigned long *addr;
-
- if (regno == PT_USP)
- addr = &task->thread.usp;
- else if (regno < ARRAY_SIZE(regoff))
- addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
- else
- return 0;
- return *addr;
-}
-
-/*
- * Write contents of register REGNO in task TASK.
- */
-static inline int put_reg(struct task_struct *task, int regno,
- unsigned long data)
-{
- unsigned long *addr;
-
- if (regno == PT_USP)
- addr = &task->thread.usp;
- else if (regno < ARRAY_SIZE(regoff))
- addr = (unsigned long *) (task->thread.esp0 + regoff[regno]);
- else
- return -1;
- *addr = data;
- return 0;
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure the single step bit is not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- unsigned long tmp;
- /* make sure the single step bit is not set. */
- tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
- put_reg(child, PT_SR, tmp);
-}
-
-long arch_ptrace(struct task_struct *child, long request, long addr, long data)
-{
- int ret;
-
- 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:
- ret = generic_ptrace_peekdata(child, addr, data);
- break;
-
- /* read the word at location addr in the USER area. */
- case PTRACE_PEEKUSR: {
- unsigned long tmp;
-
- ret = -EIO;
- if ((addr & 3) || addr < 0 ||
- addr > sizeof(struct user) - 3)
- break;
-
- tmp = 0; /* Default return condition */
- addr = addr >> 2; /* temporary hack. */
- ret = -EIO;
- if (addr < 19) {
- tmp = get_reg(child, addr);
- if (addr == PT_SR)
- tmp >>= 16;
- } else if (addr >= 21 && addr < 49) {
- tmp = child->thread.fp[addr - 21];
-#ifdef CONFIG_M68KFPU_EMU
- /* Convert internal fpu reg representation
- * into long double format
- */
- if (FPU_IS_EMU && (addr < 45) && !(addr % 3))
- tmp = ((tmp & 0xffff0000) << 15) |
- ((tmp & 0x0000ffff) << 16);
-#endif
- } else if (addr == 49) {
- tmp = child->mm->start_code;
- } else if (addr == 50) {
- tmp = child->mm->start_data;
- } else if (addr == 51) {
- tmp = child->mm->end_code;
- } else
- break;
- ret = put_user(tmp,(unsigned long *) data);
- break;
- }
-
- /* when 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 = generic_ptrace_pokedata(child, addr, data);
- break;
-
- case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
- ret = -EIO;
- if ((addr & 3) || addr < 0 ||
- addr > sizeof(struct user) - 3)
- break;
-
- addr = addr >> 2; /* temporary hack. */
-
- if (addr == PT_SR) {
- data &= SR_MASK;
- data <<= 16;
- data |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
- }
- if (addr < 19) {
- if (put_reg(child, addr, data))
- break;
- ret = 0;
- break;
- }
- if (addr >= 21 && addr < 48)
- {
-#ifdef CONFIG_M68KFPU_EMU
- /* Convert long double format
- * into internal fpu reg representation
- */
- if (FPU_IS_EMU && (addr < 45) && !(addr % 3)) {
- data = (unsigned long)data << 15;
- data = (data & 0xffff0000) |
- ((data & 0x0000ffff) >> 1);
- }
-#endif
- child->thread.fp[addr - 21] = data;
- ret = 0;
- }
- break;
-
- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: { /* restart after signal. */
- long tmp;
-
- 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. */
- tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
- put_reg(child, PT_SR, tmp);
- 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: {
- long tmp;
-
- ret = 0;
- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
- break;
- child->exit_code = SIGKILL;
- /* make sure the single step bit is not set. */
- tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
- put_reg(child, PT_SR, tmp);
- wake_up_process(child);
- break;
- }
-
- case PTRACE_SINGLESTEP: { /* set the trap flag. */
- long tmp;
-
- ret = -EIO;
- if (!valid_signal(data))
- break;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- tmp = get_reg(child, PT_SR) | (TRACE_BITS << 16);
- put_reg(child, PT_SR, tmp);
-
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- ret = 0;
- break;
- }
-
- case PTRACE_DETACH: /* detach a process that was attached. */
- ret = ptrace_detach(child, data);
- break;
-
- case PTRACE_GETREGS: { /* Get all gp regs from the child. */
- int i;
- unsigned long tmp;
- for (i = 0; i < 19; i++) {
- tmp = get_reg(child, i);
- if (i == PT_SR)
- tmp >>= 16;
- 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 < 19; i++) {
- if (get_user(tmp, (unsigned long *) data)) {
- ret = -EFAULT;
- break;
- }
- if (i == PT_SR) {
- tmp &= SR_MASK;
- tmp <<= 16;
- tmp |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
- }
- put_reg(child, i, tmp);
- data += sizeof(long);
- }
- ret = 0;
- break;
- }
-
-#ifdef PTRACE_GETFPREGS
- case PTRACE_GETFPREGS: { /* Get the child FPU state. */
- ret = 0;
- if (copy_to_user((void *)data, &child->thread.fp,
- sizeof(struct user_m68kfp_struct)))
- ret = -EFAULT;
- break;
- }
-#endif
-
-#ifdef PTRACE_SETFPREGS
- case PTRACE_SETFPREGS: { /* Set the child FPU state. */
- ret = 0;
- if (copy_from_user(&child->thread.fp, (void *)data,
- sizeof(struct user_m68kfp_struct)))
- ret = -EFAULT;
- break;
- }
-#endif
-
- default:
- ret = -EIO;
- break;
- }
- return ret;
-}
-
-asmlinkage void 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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