43 static int in_kernel_stack(struct KBacktraceIterator *kbt, unsigned long sp)  in in_kernel_stack()  argument
45 	ulong kstack_base = (ulong) kbt->task->stack;  in in_kernel_stack()
56 	struct KBacktraceIterator *kbt = (struct KBacktraceIterator *)vkbt;  in read_memory_func()  local
64 		if (!in_kernel_stack(kbt, address))  in read_memory_func()
66 	} else if (!kbt->is_current) {  in read_memory_func()
78 static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt)  in valid_fault_handler()  argument
82 	unsigned long sp = kbt->it.sp;  in valid_fault_handler()
87 	if (!in_kernel_stack(kbt, sp))  in valid_fault_handler()
89 	if (!in_kernel_stack(kbt, sp + C_ABI_SAVE_AREA_SIZE + PTREGS_SIZE-1))  in valid_fault_handler()
95 		if (kbt->verbose) {     /* else we aren't going to use it */  in valid_fault_handler()
103 	    in_kernel_stack(kbt, p->sp) &&  in valid_fault_handler()
105 		if (kbt->verbose)  in valid_fault_handler()
109 		if (kbt->verbose)  in valid_fault_handler()
111 	} else if (kbt->verbose) {  in valid_fault_handler()
116 	if (!kbt->profile || ((1ULL << p->faultnum) & QUEUED_INTERRUPTS) == 0)  in valid_fault_handler()
128 static struct pt_regs *valid_sigframe(struct KBacktraceIterator* kbt,  in valid_sigframe()  argument
131 	BacktraceIterator *b = &kbt->it;  in valid_sigframe()
144 		if (kbt->verbose) {  in valid_sigframe()
153 static int KBacktraceIterator_is_sigreturn(struct KBacktraceIterator *kbt)  in KBacktraceIterator_is_sigreturn()  argument
155 	return is_sigreturn(kbt->it.pc);  in KBacktraceIterator_is_sigreturn()
158 static int KBacktraceIterator_restart(struct KBacktraceIterator *kbt)  in KBacktraceIterator_restart()  argument
163 	p = valid_fault_handler(kbt);  in KBacktraceIterator_restart()
165 		p = valid_sigframe(kbt, &kframe);  in KBacktraceIterator_restart()
168 	backtrace_init(&kbt->it, read_memory_func, kbt,  in KBacktraceIterator_restart()
170 	kbt->new_context = 1;  in KBacktraceIterator_restart()
176 	struct KBacktraceIterator *kbt)  in KBacktraceIterator_next_item_inclusive()  argument
180 			if (!KBacktraceIterator_is_sigreturn(kbt))  in KBacktraceIterator_next_item_inclusive()
182 		} while (backtrace_next(&kbt->it));  in KBacktraceIterator_next_item_inclusive()
184 		if (!KBacktraceIterator_restart(kbt))  in KBacktraceIterator_next_item_inclusive()
217 void KBacktraceIterator_init(struct KBacktraceIterator *kbt,  in KBacktraceIterator_init()  argument
228 	kbt->is_current = is_current;  in KBacktraceIterator_init()
231 	kbt->task = t;  in KBacktraceIterator_init()
232 	kbt->verbose = 0;   /* override in caller if desired */  in KBacktraceIterator_init()
233 	kbt->profile = 0;   /* override in caller if desired */  in KBacktraceIterator_init()
234 	kbt->end = KBT_ONGOING;  in KBacktraceIterator_init()
235 	kbt->new_context = 1;  in KBacktraceIterator_init()
242 			kbt->end = KBT_RUNNING;  in KBacktraceIterator_init()
256 	backtrace_init(&kbt->it, read_memory_func, kbt, pc, lr, sp, r52);  in KBacktraceIterator_init()
257 	kbt->end = KBacktraceIterator_next_item_inclusive(kbt);  in KBacktraceIterator_init()
261 int KBacktraceIterator_end(struct KBacktraceIterator *kbt)  in KBacktraceIterator_end()  argument
263 	return kbt->end != KBT_ONGOING;  in KBacktraceIterator_end()
267 void KBacktraceIterator_next(struct KBacktraceIterator *kbt)  in KBacktraceIterator_next()  argument
269 	unsigned long old_pc = kbt->it.pc, old_sp = kbt->it.sp;  in KBacktraceIterator_next()
270 	kbt->new_context = 0;  in KBacktraceIterator_next()
271 	if (!backtrace_next(&kbt->it) && !KBacktraceIterator_restart(kbt)) {  in KBacktraceIterator_next()
272 		kbt->end = KBT_DONE;  in KBacktraceIterator_next()
275 	kbt->end = KBacktraceIterator_next_item_inclusive(kbt);  in KBacktraceIterator_next()
276 	if (old_pc == kbt->it.pc && old_sp == kbt->it.sp) {  in KBacktraceIterator_next()
278 		kbt->end = KBT_LOOP;  in KBacktraceIterator_next()
283 static void describe_addr(struct KBacktraceIterator *kbt,  in describe_addr()  argument
300 	adjust = !kbt->new_context;  in describe_addr()
329 	vma = find_vma(kbt->task->mm, address);  in describe_addr()
377 void tile_show_stack(struct KBacktraceIterator *kbt, int headers)  in tile_show_stack()  argument
393 		       kbt->task->pid, kbt->task->tgid, kbt->task->comm,  in tile_show_stack()
396 	kbt->verbose = 1;  in tile_show_stack()
398 	for (; !KBacktraceIterator_end(kbt); KBacktraceIterator_next(kbt)) {  in tile_show_stack()
400 		unsigned long address = kbt->it.pc;  in tile_show_stack()
403 		if (address < PAGE_OFFSET && !have_mmap_sem && kbt->task->mm)  in tile_show_stack()
405 				down_read_trylock(&kbt->task->mm->mmap_sem);  in tile_show_stack()
407 		describe_addr(kbt, address, have_mmap_sem,  in tile_show_stack()
411 		       i++, address, namebuf, (unsigned long)(kbt->it.sp));  in tile_show_stack()
419 	if (kbt->end == KBT_LOOP)  in tile_show_stack()
424 		up_read(&kbt->task->mm->mmap_sem);  in tile_show_stack()
433 	struct KBacktraceIterator kbt;  in dump_stack_regs()  local
434 	KBacktraceIterator_init(&kbt, NULL, regs);  in dump_stack_regs()
435 	tile_show_stack(&kbt, 1);  in dump_stack_regs()
458 void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt, ulong pc,  in _KBacktraceIterator_init_current()  argument
462 	KBacktraceIterator_init(kbt, NULL,  in _KBacktraceIterator_init_current()
469 	struct KBacktraceIterator kbt;  in show_stack()  local
471 		KBacktraceIterator_init_current(&kbt);  in show_stack()
473 		KBacktraceIterator_init(&kbt, task, NULL);  in show_stack()
474 	tile_show_stack(&kbt, 0);  in show_stack()
483 	struct KBacktraceIterator kbt;  in save_stack_trace_tsk()  local
490 		KBacktraceIterator_init_current(&kbt);  in save_stack_trace_tsk()
492 		KBacktraceIterator_init(&kbt, task, NULL);  in save_stack_trace_tsk()
493 	for (; !KBacktraceIterator_end(&kbt); KBacktraceIterator_next(&kbt)) {  in save_stack_trace_tsk()
498 		if (i >= trace->max_entries || kbt.it.pc < PAGE_OFFSET)  in save_stack_trace_tsk()
500 		trace->entries[i++] = kbt.it.pc;  in save_stack_trace_tsk()