sh: Move in the SH-5 ptrace impl.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 0 insertions, 332 deletions

diff --git a/arch/sh64/kernel/ptrace.c b/arch/sh64/kernel/ptrace.c
deleted file mode 100644
index 8a2d339cf76..00000000000
--- a/arch/sh64/kernel/ptrace.c
+++ /dev/null
@@ -1,332 +0,0 @@
-/*
- * 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.
- *
- * arch/sh64/kernel/ptrace.c
- *
- * Copyright (C) 2000, 2001  Paolo Alberelli
- * Copyright (C) 2003  Paul Mundt
- *
- * Started from SH3/4 version:
- *   SuperH version:   Copyright (C) 1999, 2000  Kaz Kojima & Niibe Yutaka
- *
- *   Original x86 implementation:
- *	By Ross Biro 1/23/92
- *	edited by Linus Torvalds
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/rwsem.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/signal.h>
-#include <linux/syscalls.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <asm/mmu_context.h>
-
-/* This mask defines the bits of the SR which the user is not allowed to
-   change, which are everything except S, Q, M, PR, SZ, FR. */
-#define SR_MASK      (0xffff8cfd)
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
- * This routine will get a word from the user area in the process kernel stack.
- */
-static inline int get_stack_long(struct task_struct *task, int offset)
-{
-	unsigned char *stack;
-
-	stack = (unsigned char *)(task->thread.uregs);
-	stack += offset;
-	return (*((int *)stack));
-}
-
-static inline unsigned long
-get_fpu_long(struct task_struct *task, unsigned long addr)
-{
-	unsigned long tmp;
-	struct pt_regs *regs;
-	regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
-
-	if (!tsk_used_math(task)) {
-		if (addr == offsetof(struct user_fpu_struct, fpscr)) {
-			tmp = FPSCR_INIT;
-		} else {
-			tmp = 0xffffffffUL; /* matches initial value in fpu.c */
-		}
-		return tmp;
-	}
-
-	if (last_task_used_math == task) {
-		grab_fpu();
-		fpsave(&task->thread.fpu.hard);
-		release_fpu();
-		last_task_used_math = 0;
-		regs->sr |= SR_FD;
-	}
-
-	tmp = ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)];
-	return tmp;
-}
-
-/*
- * This routine will put a word into the user area in the process kernel stack.
- */
-static inline int put_stack_long(struct task_struct *task, int offset,
-				 unsigned long data)
-{
-	unsigned char *stack;
-
-	stack = (unsigned char *)(task->thread.uregs);
-	stack += offset;
-	*(unsigned long *) stack = data;
-	return 0;
-}
-
-static inline int
-put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
-{
-	struct pt_regs *regs;
-
-	regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
-
-	if (!tsk_used_math(task)) {
-		fpinit(&task->thread.fpu.hard);
-		set_stopped_child_used_math(task);
-	} else if (last_task_used_math == task) {
-		grab_fpu();
-		fpsave(&task->thread.fpu.hard);
-		release_fpu();
-		last_task_used_math = 0;
-		regs->sr |= SR_FD;
-	}
-
-	((long *)&task->thread.fpu)[addr / sizeof(unsigned long)] = data;
-	return 0;
-}
-
-
-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)
-			break;
-
-		if (addr < sizeof(struct pt_regs))
-			tmp = get_stack_long(child, addr);
-		else if ((addr >= offsetof(struct user, fpu)) &&
-			 (addr <  offsetof(struct user, u_fpvalid))) {
-			tmp = get_fpu_long(child, addr - offsetof(struct user, fpu));
-		} else if (addr == offsetof(struct user, u_fpvalid)) {
-			tmp = !!tsk_used_math(child);
-		} 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. We must
-                   disallow any changes to certain SR bits or u_fpvalid, since
-                   this could crash the kernel or result in a security
-                   loophole. */
-		ret = -EIO;
-		if ((addr & 3) || addr < 0)
-			break;
-
-		if (addr < sizeof(struct pt_regs)) {
-			/* Ignore change of top 32 bits of SR */
-			if (addr == offsetof (struct pt_regs, sr)+4)
-			{
-				ret = 0;
-				break;
-			}
-			/* If lower 32 bits of SR, ignore non-user bits */
-			if (addr == offsetof (struct pt_regs, sr))
-			{
-				long cursr = get_stack_long(child, addr);
-				data &= ~(SR_MASK);
-				data |= (cursr & SR_MASK);
-			}
-			ret = put_stack_long(child, addr, data);
-		}
-		else if ((addr >= offsetof(struct user, fpu)) &&
-			 (addr <  offsetof(struct user, u_fpvalid))) {
-			ret = put_fpu_long(child, addr - offsetof(struct user, fpu), data);
-		}
-		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;
-		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;
-		wake_up_process(child);
-		break;
-	}
-
-	case PTRACE_SINGLESTEP: {  /* set the trap flag. */
-		struct pt_regs *regs;
-
-		ret = -EIO;
-		if (!valid_signal(data))
-			break;
-		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		if ((child->ptrace & PT_DTRACE) == 0) {
-			/* Spurious delayed TF traps may occur */
-			child->ptrace |= PT_DTRACE;
-		}
-
-		regs = child->thread.uregs;
-
-		regs->sr |= SR_SSTEP;	/* auto-resetting upon exception */
-
-		child->exit_code = data;
-		/* give it a chance to run. */
-		wake_up_process(child);
-		ret = 0;
-		break;
-	}
-
-	default:
-		ret = ptrace_request(child, request, addr, data);
-		break;
-	}
-	return ret;
-}
-
-asmlinkage int sh64_ptrace(long request, long pid, long addr, long data)
-{
-	extern void poke_real_address_q(unsigned long long addr, unsigned long long data);
-#define WPC_DBRMODE 0x0d104008
-	static int first_call = 1;
-
-	lock_kernel();
-	if (first_call) {
-		/* Set WPC.DBRMODE to 0.  This makes all debug events get
-		 * delivered through RESVEC, i.e. into the handlers in entry.S.
-		 * (If the kernel was downloaded using a remote gdb, WPC.DBRMODE
-		 * would normally be left set to 1, which makes debug events get
-		 * delivered through DBRVEC, i.e. into the remote gdb's
-		 * handlers.  This prevents ptrace getting them, and confuses
-		 * the remote gdb.) */
-		printk("DBRMODE set to 0 to permit native debugging\n");
-		poke_real_address_q(WPC_DBRMODE, 0);
-		first_call = 0;
-	}
-	unlock_kernel();
-
-	return sys_ptrace(request, pid, addr, data);
-}
-
-asmlinkage void syscall_trace(void)
-{
-	struct task_struct *tsk = current;
-
-	if (!test_thread_flag(TIF_SYSCALL_TRACE))
-		return;
-	if (!(tsk->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 (tsk->exit_code) {
-		send_sig(tsk->exit_code, tsk, 1);
-		tsk->exit_code = 0;
-	}
-}
-
-/* Called with interrupts disabled */
-asmlinkage void do_single_step(unsigned long long vec, struct pt_regs *regs)
-{
-	/* This is called after a single step exception (DEBUGSS).
-	   There is no need to change the PC, as it is a post-execution
-	   exception, as entry.S does not do anything to the PC for DEBUGSS.
-	   We need to clear the Single Step setting in SR to avoid
-	   continually stepping. */
-	local_irq_enable();
-	regs->sr &= ~SR_SSTEP;
-	force_sig(SIGTRAP, current);
-}
-
-/* Called with interrupts disabled */
-asmlinkage void do_software_break_point(unsigned long long vec,
-					struct pt_regs *regs)
-{
-	/* We need to forward step the PC, to counteract the backstep done
-	   in signal.c. */
-	local_irq_enable();
-	force_sig(SIGTRAP, current);
-	regs->pc += 4;
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
-        /* nothing to do.. */
-}