1 files changed, 0 insertions, 111 deletions
diff --git a/arch/i386/oprofile/backtrace.c b/arch/i386/oprofile/backtrace.c
deleted file mode 100644
index 65dfd2edb67..00000000000
--- a/arch/i386/oprofile/backtrace.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/**
- * @file backtrace.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- * @author David Smith
- */
-
-#include <linux/oprofile.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <asm/ptrace.h>
-
-struct frame_head {
-	struct frame_head * ebp;
-	unsigned long ret;
-} __attribute__((packed));
-
-static struct frame_head *
-dump_backtrace(struct frame_head * head)
-{
-	oprofile_add_trace(head->ret);
-
-	/* frame pointers should strictly progress back up the stack
-	 * (towards higher addresses) */
-	if (head >= head->ebp)
-		return NULL;
-
-	return head->ebp;
-}
-
-/* check that the page(s) containing the frame head are present */
-static int pages_present(struct frame_head * head)
-{
-	struct mm_struct * mm = current->mm;
-
-	/* FIXME: only necessary once per page */
-	if (!check_user_page_readable(mm, (unsigned long)head))
-		return 0;
-
-	return check_user_page_readable(mm, (unsigned long)(head + 1));
-}
-
-/*
- * |             | /\ Higher addresses
- * |             |
- * --------------- stack base (address of current_thread_info)
- * | thread info |
- * .             .
- * |    stack    |
- * --------------- saved regs->ebp value if valid (frame_head address)
- * .             .
- * --------------- struct pt_regs stored on stack (struct pt_regs *)
- * |             |
- * .             .
- * |             |
- * --------------- %esp
- * |             |
- * |             | \/ Lower addresses
- *
- * Thus, &pt_regs <-> stack base restricts the valid(ish) ebp values
- */
-#ifdef CONFIG_FRAME_POINTER
-static int valid_kernel_stack(struct frame_head * head, struct pt_regs * regs)
-{
-	unsigned long headaddr = (unsigned long)head;
-	unsigned long stack = (unsigned long)regs;
-	unsigned long stack_base = (stack & ~(THREAD_SIZE - 1)) + THREAD_SIZE;
-
-	return headaddr > stack && headaddr < stack_base;
-}
-#else
-/* without fp, it's just junk */
-static int valid_kernel_stack(struct frame_head * head, struct pt_regs * regs)
-{
-	return 0;
-}
-#endif
-
-
-void
-x86_backtrace(struct pt_regs * const regs, unsigned int depth)
-{
-	struct frame_head *head;
-
-#ifdef CONFIG_X86_64
-	head = (struct frame_head *)regs->rbp;
-#else
-	head = (struct frame_head *)regs->ebp;
-#endif
-
-	if (!user_mode_vm(regs)) {
-		while (depth-- && valid_kernel_stack(head, regs))
-			head = dump_backtrace(head);
-		return;
-	}
-
-#ifdef CONFIG_SMP
-	if (!spin_trylock(&current->mm->page_table_lock))
-		return;
-#endif
-
-	while (depth-- && head && pages_present(head))
-		head = dump_backtrace(head);
-
-#ifdef CONFIG_SMP
-	spin_unlock(&current->mm->page_table_lock);
-#endif
-}