1 files changed, 0 insertions, 116 deletions
diff --git a/drivers/gator/driver/gator_backtrace.c b/drivers/gator/driver/gator_backtrace.c
deleted file mode 100644
index 26503ef0a55..00000000000
--- a/drivers/gator/driver/gator_backtrace.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/**
- * Copyright (C) ARM Limited 2010-2012. All rights reserved.
- *
- * 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.
- *
- */
-
-/*
- * EABI backtrace stores {fp,lr} on the stack.
- */
-struct frame_tail_eabi {
-	unsigned long fp; // points to prev_lr
-	unsigned long lr;
-};
-
-static void arm_backtrace_eabi(int cpu, int buftype, struct pt_regs * const regs, unsigned int depth)
-{
-#if defined(__arm__)
-	struct frame_tail_eabi *tail;
-	struct frame_tail_eabi *next;
-	struct frame_tail_eabi *ptrtail;
-	struct frame_tail_eabi buftail;
-	unsigned long fp = regs->ARM_fp;
-	unsigned long sp = regs->ARM_sp;
-	unsigned long lr = regs->ARM_lr;
-	int is_user_mode = user_mode(regs);
-
-	if (!is_user_mode) {
-		return;
-	}
-
-	/* entry preamble may not have executed */
-	gator_add_trace(cpu, buftype, lr);
-
-	/* check tail is valid */
-	if (fp == 0 || fp < sp) {
-		return;
-	}
-
-	tail = (struct frame_tail_eabi *)(fp - 4);
-
-	while (depth-- && tail && !((unsigned long) tail & 3)) {
-		/* Also check accessibility of one struct frame_tail beyond */
-		if (!access_ok(VERIFY_READ, tail, sizeof(struct frame_tail_eabi)))
-			return;
-		if (__copy_from_user_inatomic(&buftail, tail, sizeof(struct frame_tail_eabi)))
-			return;
-		ptrtail = &buftail;
-
-		lr = ptrtail[0].lr;
-		gator_add_trace(cpu, buftype, lr);
-
-		/* frame pointers should progress back up the stack, towards higher addresses */
-		next = (struct frame_tail_eabi *)(lr - 4);
-		if (tail >= next || lr == 0) {
-			fp = ptrtail[0].fp;
-			next = (struct frame_tail_eabi *)(fp - 4);
-			/* check tail is valid */
-			if (tail >= next || fp == 0) {
-				return;
-			}
-		}
-
-		tail = next;
-	}
-#endif
-}
-
-#if defined(__arm__)
-static DEFINE_PER_CPU(int, backtrace_buffer);
-static int report_trace(struct stackframe *frame, void *d)
-{
-	struct module *mod;
-	unsigned int *depth = d, addr = frame->pc, cookie = NO_COOKIE, cpu = smp_processor_id();
-
-	if (*depth) {
-		mod = __module_address(addr);
-		if (mod) {
-			cookie = get_cookie(cpu, per_cpu(backtrace_buffer, cpu), current, NULL, mod, true);
-			addr = addr - (unsigned long)mod->module_core;
-		}
-		gator_buffer_write_packed_int(cpu, per_cpu(backtrace_buffer, cpu), addr & ~1);
-		gator_buffer_write_packed_int(cpu, per_cpu(backtrace_buffer, cpu), cookie);
-		(*depth)--;
-	}
-
-	return *depth == 0;
-}
-#endif
-
-// Uncomment the following line to enable kernel stack unwinding within gator, note it can also be defined from the Makefile
-// #define GATOR_KERNEL_STACK_UNWINDING
-static void kernel_backtrace(int cpu, int buftype, struct pt_regs * const regs)
-{
-#if defined(__arm__)
-#ifdef GATOR_KERNEL_STACK_UNWINDING
-	int depth = gator_backtrace_depth;
-#else
-	int depth = 1;
-#endif
-	struct stackframe frame;
-	if (depth == 0)
-		depth = 1;
-	frame.fp = regs->ARM_fp;
-	frame.sp = regs->ARM_sp;
-	frame.lr = regs->ARM_lr;
-	frame.pc = regs->ARM_pc;
-	per_cpu(backtrace_buffer, cpu) = buftype;
-	walk_stackframe(&frame, report_trace, &depth);
-#else
-	gator_buffer_write_packed_int(cpu, buftype, PC_REG & ~1);
-	gator_buffer_write_packed_int(cpu, buftype, NO_COOKIE);
-#endif
-}