linux-kernel - [PATCH 27/52] [microblaze] traps support

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Message-Id: <2d11eef3abada1f41658a532a483c6121ded8054.1201107832.git.monstr@monstr.eu>
Date:	Thu, 24 Jan 2008 16:03:02 +0100
From:	monstr@...str.eu
To:	monstr@...str.eu
Cc:	linux-kernel@...r.kernel.org, stephen.neuendorffer@...inx.com,
	john.williams@...alogix.com, microblaze-uclinux@...e.uq.edu.au
Subject: [PATCH 27/52] [microblaze] traps support

From: Michal Simek <monstr@...str.eu>


Signed-off-by: Michal Simek <monstr@...str.eu>
---
 arch/microblaze/kernel/traps.c |   88 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 88 insertions(+), 0 deletions(-)
 create mode 100644 arch/microblaze/kernel/traps.c

diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c
new file mode 100644
index 0000000..eb8202b
--- /dev/null
+++ b/arch/microblaze/kernel/traps.c
@@ -0,0 +1,88 @@
+/*
+ * arch/microblaze/kernel/traps.c
+ *
+ * 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.
+ *
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/kallsyms.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+
+#include <asm/exceptions.h>
+#include <asm/system.h>
+
+void trap_init(void)
+{
+	initialize_exception_handlers();
+	__enable_hw_exceptions();
+}
+
+void __bad_xchg(volatile void *ptr, int size)
+{
+	printk(KERN_INFO "xchg: bad data size: pc 0x%p, ptr 0x%p, size %d\n",
+		__builtin_return_address(0), ptr, size);
+	BUG();
+}
+EXPORT_SYMBOL(__bad_xchg);
+
+static int kstack_depth_to_print = 24;
+
+void show_trace(struct task_struct *task, unsigned long *stack)
+{
+	unsigned long addr;
+
+	if (!stack)
+		stack = (unsigned long *)&stack;
+
+	printk(KERN_INFO "Call Trace: ");
+#ifdef CONFIG_KALLSYMS
+	printk(KERN_INFO "\n");
+#endif
+	while (!kstack_end(stack)) {
+		addr = *stack++;
+		if (__kernel_text_address(addr)) {
+			printk(KERN_INFO "[<%08lx>] ", addr);
+			print_symbol("%s\n", addr);
+		}
+	}
+	printk(KERN_INFO "\n");
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+	unsigned long *stack;
+	int i;
+
+	if (sp == NULL) {
+		if (task)
+			sp = (unsigned long *) ((struct thread_info *)
+						(task->stack))->cpu_context.sp;
+		else
+			sp = (unsigned long *)&sp;
+	}
+
+	stack = sp;
+
+	printk(KERN_INFO "\nStack:\n  ");
+
+	for (i = 0; i < kstack_depth_to_print; i++) {
+		if (kstack_end(sp))
+			break;
+		if (i && ((i % 8) == 0))
+			printk("\n  ");
+		printk("%08lx ", *sp++);
+	}
+	printk("\n");
+	show_trace(task, stack);
+}
+
+void dump_stack(void)
+{
+	show_stack(NULL, NULL);
+}
+EXPORT_SYMBOL(dump_stack);
-- 
1.5.4.rc4.14.g6fc74

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