1 files changed, 0 insertions, 116 deletions
diff --git a/arch/arm/oprofile/backtrace.c b/arch/arm/oprofile/backtrace.c
deleted file mode 100644
index 7c22c12618c..00000000000
--- a/arch/arm/oprofile/backtrace.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * Arm specific backtracing code for oprofile
- *
- * Copyright 2005 Openedhand Ltd.
- *
- * Author: Richard Purdie <rpurdie@openedhand.com>
- *
- * Based on i386 oprofile backtrace code by John Levon, David Smith
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#include <linux/oprofile.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <asm/ptrace.h>
-#include <asm/uaccess.h>
-
-
-/*
- * The registers we're interested in are at the end of the variable
- * length saved register structure. The fp points at the end of this
- * structure so the address of this struct is:
- * (struct frame_tail *)(xxx->fp)-1
- */
-struct frame_tail {
-	struct frame_tail *fp;
-	unsigned long sp;
-	unsigned long lr;
-} __attribute__((packed));
-
-
-#ifdef CONFIG_FRAME_POINTER
-static struct frame_tail* kernel_backtrace(struct frame_tail *tail)
-{
-	oprofile_add_trace(tail->lr);
-
-	/* frame pointers should strictly progress back up the stack
-	 * (towards higher addresses) */
-	if (tail >= tail->fp)
-		return NULL;
-
-	return tail->fp-1;
-}
-#endif
-
-static struct frame_tail* user_backtrace(struct frame_tail *tail)
-{
-	struct frame_tail buftail[2];
-
-	/* Also check accessibility of one struct frame_tail beyond */
-	if (!access_ok(VERIFY_READ, tail, sizeof(buftail)))
-		return NULL;
-	if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail)))
-		return NULL;
-
-	oprofile_add_trace(buftail[0].lr);
-
-	/* frame pointers should strictly progress back up the stack
-	 * (towards higher addresses) */
-	if (tail >= buftail[0].fp)
-		return NULL;
-
-	return buftail[0].fp-1;
-}
-
-/*
- * |             | /\ Higher addresses
- * |             |
- * --------------- stack base (address of current_thread_info)
- * | thread info |
- * .             .
- * |    stack    |
- * --------------- saved regs->ARM_fp value if valid (frame_tail address)
- * .             .
- * --------------- struct pt_regs stored on stack (struct pt_regs *)
- * |             |
- * .             .
- * |             |
- * --------------- %esp
- * |             |
- * |             | \/ Lower addresses
- *
- * Thus, &pt_regs <-> stack base restricts the valid(ish) fp values
- */
-static int valid_kernel_stack(struct frame_tail *tail, struct pt_regs *regs)
-{
-	unsigned long tailaddr = (unsigned long)tail;
-	unsigned long stack = (unsigned long)regs;
-	unsigned long stack_base = (stack & ~(THREAD_SIZE - 1)) + THREAD_SIZE;
-
-	return (tailaddr > stack) && (tailaddr < stack_base);
-}
-
-void arm_backtrace(struct pt_regs * const regs, unsigned int depth)
-{
-	struct frame_tail *tail;
-
-	tail = ((struct frame_tail *) regs->ARM_fp) - 1;
-
-	if (!user_mode(regs)) {
-
-#ifdef CONFIG_FRAME_POINTER
-		while (depth-- && tail && valid_kernel_stack(tail, regs)) {
-			tail = kernel_backtrace(tail);
-		}
-#endif
-		return;
-	}
-
-	while (depth-- && tail && !((unsigned long) tail & 3))
-		tail = user_backtrace(tail);
-}