diff options
author | David S. Miller <davem@davemloft.net> | 2009-04-16 17:35:26 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-04-16 17:35:26 -0700 |
commit | a54bfa40fd16aeb90bc556189221576f746f8567 (patch) | |
tree | 176bb7a99ffab5f42f0dd4e9671f335be3f3efa0 /arch/microblaze/kernel/traps.c | |
parent | fe957c40ec5e2763b9977c565beab3bde3aaf85b (diff) | |
parent | 134ffb4cad92a6aa534e55a9be145bca780a32c1 (diff) |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Diffstat (limited to 'arch/microblaze/kernel/traps.c')
-rw-r--r-- | arch/microblaze/kernel/traps.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c new file mode 100644 index 00000000000..fbdc533c61e --- /dev/null +++ b/arch/microblaze/kernel/traps.c @@ -0,0 +1,107 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/kallsyms.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/debug_locks.h> + +#include <asm/exceptions.h> +#include <asm/system.h> + +void trap_init(void) +{ + __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; + +static int __init kstack_setup(char *s) +{ + kstack_depth_to_print = strict_strtoul(s, 0, 0); + + return 1; +} +__setup("kstack=", kstack_setup); + +void show_trace(struct task_struct *task, unsigned long *stack) +{ + unsigned long addr; + + if (!stack) + stack = (unsigned long *)&stack; + + printk(KERN_NOTICE "Call Trace: "); +#ifdef CONFIG_KALLSYMS + printk(KERN_NOTICE "\n"); +#endif + while (!kstack_end(stack)) { + addr = *stack++; + /* + * If the address is either in the text segment of the + * kernel, or in the region which contains vmalloc'ed + * memory, it *may* be the address of a calling + * routine; if so, print it so that someone tracing + * down the cause of the crash will be able to figure + * out the call path that was taken. + */ + if (kernel_text_address(addr)) + print_ip_sym(addr); + } + printk(KERN_NOTICE "\n"); + + if (!task) + task = current; + + debug_show_held_locks(task); +} + +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.r1; + 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); |