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()
112 		if (kbt->verbose)  in valid_fault_handler()
117 	if (kbt->profile && ((1ULL << p->faultnum) & QUEUED_INTERRUPTS) != 0)  in valid_fault_handler()
129 static struct pt_regs *valid_sigframe(struct KBacktraceIterator* kbt,  in valid_sigframe()  argument
132 	BacktraceIterator *b = &kbt->it;  in valid_sigframe()
145 		if (kbt->verbose) {  in valid_sigframe()
154 static int KBacktraceIterator_is_sigreturn(struct KBacktraceIterator *kbt)  in KBacktraceIterator_is_sigreturn()  argument
156 	return is_sigreturn(kbt->it.pc);  in KBacktraceIterator_is_sigreturn()
159 static int KBacktraceIterator_restart(struct KBacktraceIterator *kbt)  in KBacktraceIterator_restart()  argument
164 	p = valid_fault_handler(kbt);  in KBacktraceIterator_restart()
166 		p = valid_sigframe(kbt, &kframe);  in KBacktraceIterator_restart()
169 	backtrace_init(&kbt->it, read_memory_func, kbt,  in KBacktraceIterator_restart()
171 	kbt->new_context = 1;  in KBacktraceIterator_restart()
177 	struct KBacktraceIterator *kbt)  in KBacktraceIterator_next_item_inclusive()  argument
181 			if (!KBacktraceIterator_is_sigreturn(kbt))  in KBacktraceIterator_next_item_inclusive()
183 		} while (backtrace_next(&kbt->it));  in KBacktraceIterator_next_item_inclusive()
185 		if (!KBacktraceIterator_restart(kbt))  in KBacktraceIterator_next_item_inclusive()
218 void KBacktraceIterator_init(struct KBacktraceIterator *kbt,  in KBacktraceIterator_init()  argument
229 	kbt->is_current = is_current;  in KBacktraceIterator_init()
232 	kbt->task = t;  in KBacktraceIterator_init()
233 	kbt->verbose = 0;   /* override in caller if desired */  in KBacktraceIterator_init()
234 	kbt->profile = 0;   /* override in caller if desired */  in KBacktraceIterator_init()
235 	kbt->end = KBT_ONGOING;  in KBacktraceIterator_init()
236 	kbt->new_context = 1;  in KBacktraceIterator_init()
243 			kbt->end = KBT_RUNNING;  in KBacktraceIterator_init()
257 	backtrace_init(&kbt->it, read_memory_func, kbt, pc, lr, sp, r52);  in KBacktraceIterator_init()
258 	kbt->end = KBacktraceIterator_next_item_inclusive(kbt);  in KBacktraceIterator_init()
262 int KBacktraceIterator_end(struct KBacktraceIterator *kbt)  in KBacktraceIterator_end()  argument
264 	return kbt->end != KBT_ONGOING;  in KBacktraceIterator_end()
268 void KBacktraceIterator_next(struct KBacktraceIterator *kbt)  in KBacktraceIterator_next()  argument
270 	unsigned long old_pc = kbt->it.pc, old_sp = kbt->it.sp;  in KBacktraceIterator_next()
271 	kbt->new_context = 0;  in KBacktraceIterator_next()
272 	if (!backtrace_next(&kbt->it) && !KBacktraceIterator_restart(kbt)) {  in KBacktraceIterator_next()
273 		kbt->end = KBT_DONE;  in KBacktraceIterator_next()
276 	kbt->end = KBacktraceIterator_next_item_inclusive(kbt);  in KBacktraceIterator_next()
277 	if (old_pc == kbt->it.pc && old_sp == kbt->it.sp) {  in KBacktraceIterator_next()
279 		kbt->end = KBT_LOOP;  in KBacktraceIterator_next()
284 static void describe_addr(struct KBacktraceIterator *kbt,  in describe_addr()  argument
301 	adjust = !kbt->new_context;  in describe_addr()
330 	vma = find_vma(kbt->task->mm, address);  in describe_addr()
378 void tile_show_stack(struct KBacktraceIterator *kbt, int headers)  in tile_show_stack()  argument
392 		       kbt->task->pid, kbt->task->tgid, kbt->task->comm,  in tile_show_stack()
395 	kbt->verbose = 1;  in tile_show_stack()
397 	for (; !KBacktraceIterator_end(kbt); KBacktraceIterator_next(kbt)) {  in tile_show_stack()
399 		unsigned long address = kbt->it.pc;  in tile_show_stack()
402 		if (address < PAGE_OFFSET && !have_mmap_sem && kbt->task->mm)  in tile_show_stack()
404 				down_read_trylock(&kbt->task->mm->mmap_sem);  in tile_show_stack()
406 		describe_addr(kbt, address, have_mmap_sem,  in tile_show_stack()
410 		       i++, address, namebuf, (unsigned long)(kbt->it.sp));  in tile_show_stack()
417 	if (kbt->end == KBT_LOOP)  in tile_show_stack()
422 		up_read(&kbt->task->mm->mmap_sem);  in tile_show_stack()
431 	struct KBacktraceIterator kbt;  in dump_stack_regs()  local
432 	KBacktraceIterator_init(&kbt, NULL, regs);  in dump_stack_regs()
433 	tile_show_stack(&kbt, 1);  in dump_stack_regs()
456 void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt, ulong pc,  in _KBacktraceIterator_init_current()  argument
460 	KBacktraceIterator_init(kbt, NULL,  in _KBacktraceIterator_init_current()
467 	struct KBacktraceIterator kbt;  in show_stack()  local
469 		KBacktraceIterator_init_current(&kbt);  in show_stack()
471 		KBacktraceIterator_init(&kbt, task, NULL);  in show_stack()
472 	tile_show_stack(&kbt, 0);  in show_stack()
481 	struct KBacktraceIterator kbt;  in save_stack_trace_tsk()  local
488 		KBacktraceIterator_init_current(&kbt);  in save_stack_trace_tsk()
490 		KBacktraceIterator_init(&kbt, task, NULL);  in save_stack_trace_tsk()
491 	for (; !KBacktraceIterator_end(&kbt); KBacktraceIterator_next(&kbt)) {  in save_stack_trace_tsk()
496 		if (i >= trace->max_entries || kbt.it.pc < PAGE_OFFSET)  in save_stack_trace_tsk()
498 		trace->entries[i++] = kbt.it.pc;  in save_stack_trace_tsk()