void
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
unsigned long *sp, unsigned long bp, char *log_lvl)
{
unsigned long *stack;
int i;
if (sp == NULL) {
if (task)
sp = (unsigned long *)task->thread.sp;
else
sp = (unsigned long *)&sp;
}
stack = sp;
for (i = 0; i < kstack_depth_to_print; i++) {
if (kstack_end(stack))
break;
if ((i % STACKSLOTS_PER_LINE) == 0) {
if (i != 0)
pr_cont("\n");
printk("%s %08lx", log_lvl, *stack++);
} else
pr_cont(" %08lx", *stack++);
touch_nmi_watchdog();
}
pr_cont("\n");
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
}
void show_stack(struct task_struct *task, unsigned long *sp)
{
unsigned long *stack;
int i;
/*
* debugging aid: "show_stack(NULL);" prints the
* back trace for this cpu.
*/
if(sp==NULL) {
if (task)
sp = (unsigned long *)task->thread.sp;
else
sp=(unsigned long*)&sp;
}
stack = sp;
for(i=0; i < kstack_depth_to_print; i++) {
if (kstack_end(stack))
break;
if (i && ((i % 4) == 0))
printk("\n ");
printk("%08lx ", *stack++);
}
printk("\n");
show_trace(task, sp);
}
/* displays a short stack trace */
void show_stack(struct task_struct *task, unsigned long *esp)
{
unsigned long addr, *stack;
int i;
if (esp == NULL)
esp = (unsigned long *)&esp;
stack = esp;
printk("Stack dump [0x%08lx]:\n", (unsigned long)esp);
for (i = 0; i < kstack_depth_to_print; i++) {
if (kstack_end(stack))
break;
if (__get_user(addr, stack)) {
/* This message matches "failing address" marked
s390 in ksymoops, so lines containing it will
not be filtered out by ksymoops. */
printk("Failing address 0x%lx\n", (unsigned long)stack);
break;
}
stack++;
printk("sp + %02d: 0x%08lx\n", i * 4, addr);
}
printk("\n");
show_trace(task, esp);
return;
}
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 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);
}
static void notrace walk_stackframe(struct task_struct *task,
struct pt_regs *regs, bool (*fn)(unsigned long, void *), void *arg)
{
unsigned long sp, pc;
unsigned long *ksp;
if (regs) {
sp = user_stack_pointer(regs);
pc = instruction_pointer(regs);
} else if (task == NULL || task == current) {
const register unsigned long current_sp __asm__ ("sp");
sp = current_sp;
pc = (unsigned long)walk_stackframe;
} else {
/* task blocked in __switch_to */
sp = task->thread.sp;
pc = task->thread.ra;
}
if (unlikely(sp & 0x7))
return;
ksp = (unsigned long *)sp;
while (!kstack_end(ksp)) {
if (__kernel_text_address(pc) && unlikely(fn(pc, arg)))
break;
pc = (*ksp++) - 0x4;
}
}
static void show_trace(struct task_struct *tsk, unsigned long *sp)
{
unsigned long addr;
printk("\nCall Trace:");
#ifdef CONFIG_KALLSYMS
printk("\n");
#endif
while (!kstack_end(sp)) {
addr = *sp++;
/*
* 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("\n");
}
/* This recently started being used in arch-independent code too, as in
* kernel/sched.c.*/
void show_stack(struct task_struct *task, unsigned long *esp)
{
unsigned long *stack;
int i;
if (esp == NULL) {
if (task != current && task != NULL) {
esp = (unsigned long *) KSTK_ESP(task);
} else {
esp = (unsigned long *) &esp;
}
}
stack = esp;
for(i = 0; i < kstack_depth_to_print; i++) {
if (kstack_end(stack))
break;
if (i && ((i % 8) == 0))
printk("\n ");
printk("%08lx ", *stack++);
}
printk("Call Trace: \n");
show_trace(task, esp);
}
void
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
unsigned long *sp, unsigned long bp, char *log_lvl)
{
unsigned long *irq_stack_end;
unsigned long *irq_stack;
unsigned long *stack;
int cpu;
int i;
preempt_disable();
cpu = smp_processor_id();
irq_stack_end = (unsigned long *)(per_cpu(irq_stack_ptr, cpu));
irq_stack = (unsigned long *)(per_cpu(irq_stack_ptr, cpu) - IRQ_STACK_SIZE);
/*
* Debugging aid: "show_stack(NULL, NULL);" prints the
* back trace for this cpu:
*/
if (sp == NULL) {
if (task)
sp = (unsigned long *)task->thread.sp;
else
sp = (unsigned long *)&sp;
}
stack = sp;
for (i = 0; i < kstack_depth_to_print; i++) {
if (stack >= irq_stack && stack <= irq_stack_end) {
if (stack == irq_stack_end) {
stack = (unsigned long *) (irq_stack_end[-1]);
pr_cont(" <EOI> ");
}
} else {
if (kstack_end(stack))
break;
}
if ((i % STACKSLOTS_PER_LINE) == 0) {
if (i != 0)
pr_cont("\n");
printk("%s %016lx", log_lvl, *stack++);
} else
pr_cont(" %016lx", *stack++);
touch_nmi_watchdog();
}
preempt_enable();
pr_cont("\n");
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
}
static void __dump(struct task_struct *tsk, unsigned long *base_reg)
{
unsigned long ret_addr;
int cnt = LOOP_TIMES, graph = 0;
pr_emerg("Call Trace:\n");
if (!IS_ENABLED(CONFIG_FRAME_POINTER)) {
while (!kstack_end(base_reg)) {
ret_addr = *base_reg++;
if (__kernel_text_address(ret_addr)) {
get_real_ret_addr(&ret_addr, tsk, &graph);
print_ip_sym(ret_addr);
}
if (--cnt < 0)
break;
}
} else {
while (!kstack_end((void *)base_reg) &&
!((unsigned long)base_reg & 0x3) &&
((unsigned long)base_reg >= TASK_SIZE)) {
unsigned long next_fp;
#if !defined(NDS32_ABI_2)
ret_addr = base_reg[0];
next_fp = base_reg[1];
#else
ret_addr = base_reg[-1];
next_fp = base_reg[FP_OFFSET];
#endif
if (__kernel_text_address(ret_addr)) {
get_real_ret_addr(&ret_addr, tsk, &graph);
print_ip_sym(ret_addr);
}
if (--cnt < 0)
break;
base_reg = (unsigned long *)next_fp;
}
}
pr_emerg("\n");
}
static void show_trace(struct task_struct *task, unsigned long *stack)
{
unsigned long addr;
if (!stack)
stack = (unsigned long*)&stack;
printk("Call Trace: ");
while (!kstack_end(stack)) {
addr = *stack++;
if (__kernel_text_address(addr))
printk("[<%08lx>] %pSR\n", addr, (void *)addr);
}
printk("\n");
}
void show_trace(struct task_struct *task, unsigned long *stack)
{
unsigned long addr;
if (!stack)
stack = (unsigned long*)&stack;
printk("Call Trace: ");
while (!kstack_end(stack)) {
addr = *stack++;
if (__kernel_text_address(addr)) {
printk("[<%08lx>] ", addr);
print_symbol("%s\n", addr);
}
}
printk("\n");
}
/*
* Save stack-backtrace addresses into a stack_trace buffer:
*/
static void save_raw_context_stack(struct stack_trace *trace,
unsigned long reg29)
{
unsigned long *sp = (unsigned long *)reg29;
unsigned long addr;
while (!kstack_end(sp)) {
addr = *sp++;
if (__kernel_text_address(addr)) {
if (trace->skip > 0)
trace->skip--;
else
trace->entries[trace->nr_entries++] = addr;
if (trace->nr_entries >= trace->max_entries)
break;
}
}
}
void
stack_reader_dump(struct task_struct *task, struct pt_regs *regs,
unsigned long *sp, const struct stacktrace_ops *ops,
void *data)
{
struct thread_info *context;
int graph = 0;
context = (struct thread_info *)
((unsigned long)sp & (~(THREAD_SIZE - 1)));
while (!kstack_end(sp)) {
unsigned long addr = *sp++;
if (__kernel_text_address(addr)) {
ops->address(data, addr, 1);
print_ftrace_graph_addr(addr, data, ops,
context, &graph);
}
}
}