#include <linux/kexec.h>
#include <linux/bug.h>
#include <linux/nmi.h>
+#include <linux/sysfs.h>
#include <asm/stacktrace.h>
+#define STACKSLOTS_PER_LINE 8
+#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
+
int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 24;
+int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
static unsigned int code_bytes = 64;
static int die_counter;
void printk_address(unsigned long address, int reliable)
{
-#ifdef CONFIG_KALLSYMS
- unsigned long offset = 0;
- unsigned long symsize;
- const char *symname;
- char *modname;
- char *delim = ":";
- char namebuf[KSYM_NAME_LEN];
- char reliab[4] = "";
-
- symname = kallsyms_lookup(address, &symsize, &offset,
- &modname, namebuf);
- if (!symname) {
- printk(" [<%08lx>]\n", address);
- return;
- }
- if (!reliable)
- strcpy(reliab, "? ");
-
- if (!modname)
- modname = delim = "";
- printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
- address, reliab, delim, modname, delim, symname, offset, symsize);
-#else
- printk(" [<%08lx>]\n", address);
-#endif
+ printk(" [<%p>] %s%pS\n", (void *) address,
+ reliable ? "" : "? ", (void *) address);
}
static inline int valid_stack_ptr(struct thread_info *tinfo,
- void *p, unsigned int size)
+ void *p, unsigned int size, void *end)
{
void *t = tinfo;
- return p > t && p <= t + THREAD_SIZE - size;
+ if (end) {
+ if (p < end && p >= (end-THREAD_SIZE))
+ return 1;
+ else
+ return 0;
+ }
+ return p > t && p < t + THREAD_SIZE - size;
}
/* The form of the top of the frame on the stack */
static inline unsigned long
print_context_stack(struct thread_info *tinfo,
unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
+ const struct stacktrace_ops *ops, void *data,
+ unsigned long *end)
{
struct stack_frame *frame = (struct stack_frame *)bp;
- while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
unsigned long addr;
addr = *stack;
if (__kernel_text_address(addr)) {
- if ((unsigned long) stack == bp + 4) {
+ if ((unsigned long) stack == bp + sizeof(long)) {
ops->address(data, addr, 1);
frame = frame->next_frame;
bp = (unsigned long) frame;
if (!stack) {
unsigned long dummy;
stack = &dummy;
- if (task != current)
+ if (task && task != current)
stack = (unsigned long *)task->thread.sp;
}
if (!bp) {
if (task == current) {
/* Grab bp right from our regs */
- asm("movl %%ebp, %0" : "=r" (bp) :);
+ get_bp(bp);
} else {
/* bp is the last reg pushed by switch_to */
bp = *(unsigned long *) task->thread.sp;
context = (struct thread_info *)
((unsigned long)stack & (~(THREAD_SIZE - 1)));
- bp = print_context_stack(context, stack, bp, ops, data);
- /*
- * Should be after the line below, but somewhere
- * in early boot context comes out corrupted and we
- * can't reference it:
- */
- if (ops->stack(data, "IRQ") < 0)
- break;
+ bp = print_context_stack(context, stack, bp, ops, data, NULL);
+
stack = (unsigned long *)context->previous_esp;
if (!stack)
break;
+ if (ops->stack(data, "IRQ") < 0)
+ break;
touch_nmi_watchdog();
}
}
static int print_trace_stack(void *data, char *name)
{
+ printk("%s <%s> ", (char *)data, name);
return 0;
}
*/
static void print_trace_address(void *data, unsigned long addr, int reliable)
{
- printk("%s [<%08lx>] ", (char *)data, addr);
- if (!reliable)
- printk("? ");
- print_symbol("%s\n", addr);
touch_nmi_watchdog();
+ printk(data);
+ printk_address(addr, reliable);
}
static const struct stacktrace_ops print_trace_ops = {
show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
unsigned long *stack, unsigned long bp, char *log_lvl)
{
+ printk("%sCall Trace:\n", log_lvl);
dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
- printk("%s =======================\n", log_lvl);
}
void show_trace(struct task_struct *task, struct pt_regs *regs,
static void
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl)
+ unsigned long *sp, unsigned long bp, char *log_lvl)
{
unsigned long *stack;
int i;
for (i = 0; i < kstack_depth_to_print; i++) {
if (kstack_end(stack))
break;
- if (i && ((i % 8) == 0))
- printk("\n%s ", log_lvl);
- printk("%08lx ", *stack++);
+ if (i && ((i % STACKSLOTS_PER_LINE) == 0))
+ printk("\n%s", log_lvl);
+ printk(" %08lx", *stack++);
+ touch_nmi_watchdog();
}
- printk("\n%sCall Trace:\n", log_lvl);
-
+ printk("\n");
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
}
void show_stack(struct task_struct *task, unsigned long *sp)
{
- printk(" ");
show_stack_log_lvl(task, NULL, sp, 0, "");
}
#ifdef CONFIG_FRAME_POINTER
if (!bp)
- asm("movl %%ebp, %0" : "=r" (bp):);
+ get_bp(bp);
#endif
printk("Pid: %d, comm: %.20s %s %s %.*s\n",
init_utsname()->release,
(int)strcspn(init_utsname()->version, " "),
init_utsname()->version);
-
- show_trace(current, NULL, &stack, bp);
+ show_trace(NULL, NULL, &stack, bp);
}
EXPORT_SYMBOL(dump_stack);
print_modules();
__show_regs(regs, 0);
- printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)\n",
TASK_COMM_LEN, current->comm, task_pid_nr(current),
current_thread_info(), current, task_thread_info(current));
/*
unsigned char c;
u8 *ip;
- printk("\n" KERN_EMERG "Stack: ");
- show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
+ printk(KERN_EMERG "Stack:\n");
+ show_stack_log_lvl(NULL, regs, ®s->sp,
+ 0, KERN_EMERG);
printk(KERN_EMERG "Code: ");
ip = (u8 *)regs->ip - code_prologue;
if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
- /* try starting at EIP */
+ /* try starting at IP */
ip = (u8 *)regs->ip;
code_len = code_len - code_prologue + 1;
}
if (kexec_should_crash(current))
crash_kexec(regs);
-
if (in_interrupt())
panic("Fatal exception in interrupt");
-
if (panic_on_oops)
panic("Fatal exception");
-
oops_exit();
do_exit(signr);
}
printk("DEBUG_PAGEALLOC");
#endif
printk("\n");
+ sysfs_printk_last_file();
if (notify_die(DIE_OOPS, str, regs, err,
current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
return 1;
oops_end(flags, regs, SIGSEGV);
}
+static DEFINE_SPINLOCK(nmi_print_lock);
+
+void notrace __kprobes
+die_nmi(char *str, struct pt_regs *regs, int do_panic)
+{
+ if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+ return;
+
+ spin_lock(&nmi_print_lock);
+ /*
+ * We are in trouble anyway, lets at least try
+ * to get a message out:
+ */
+ bust_spinlocks(1);
+ printk(KERN_EMERG "%s", str);
+ printk(" on CPU%d, ip %08lx, registers:\n",
+ smp_processor_id(), regs->ip);
+ show_registers(regs);
+ if (do_panic)
+ panic("Non maskable interrupt");
+ console_silent();
+ spin_unlock(&nmi_print_lock);
+
+ /*
+ * If we are in kernel we are probably nested up pretty bad
+ * and might aswell get out now while we still can:
+ */
+ if (!user_mode_vm(regs)) {
+ current->thread.trap_no = 2;
+ crash_kexec(regs);
+ }
+
+ bust_spinlocks(0);
+ do_exit(SIGSEGV);
+}
+
+static int __init oops_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ if (!strcmp(s, "panic"))
+ panic_on_oops = 1;
+ return 0;
+}
+early_param("oops", oops_setup);
+
static int __init kstack_setup(char *s)
{
+ if (!s)
+ return -EINVAL;
kstack_depth_to_print = simple_strtoul(s, NULL, 0);
-
- return 1;
+ return 0;
}
-__setup("kstack=", kstack_setup);
+early_param("kstack", kstack_setup);
static int __init code_bytes_setup(char *s)
{
projects / linux-2.6-omap-h63xx.git / blobdiff