x86/kernel/dumpstack_64.c

1 // SPDX-License-Identifier: GPL-2.0
46 		 * On 64-bit, we have a generic entry stack that we  in stack_type_name()
47 		 * use for all the kernel entry points, including  in stack_type_name()
54 		return exception_stack_names[type - STACK_TYPE_EXCEPTION];  in stack_type_name()
60  * struct estack_pages - Page descriptor for exception stacks
73 	 PFN_DOWN(CEA_ESTACK_OFFS(st) + CEA_ESTACK_SIZE(st) - 1)] = {	\
80  * PAGE_SIZE, all pages covering a particular stack will have the same
81  * info. The guard pages including the not mapped DB2 stack are zeroed
117 	k = (stk - begin) >> PAGE_SHIFT;  in in_exception_stack()
120 	/* Guard page? */  in in_exception_stack()
121 	if (!ep->size)  in in_exception_stack()
124 	begin += (unsigned long)ep->offs;  in in_exception_stack()
125 	end = begin + (unsigned long)ep->size;  in in_exception_stack()
126 	regs = (struct pt_regs *)end - 1;  in in_exception_stack()
128 	info->type	= ep->type;  in in_exception_stack()
129 	info->begin	= (unsigned long *)begin;  in in_exception_stack()
130 	info->end	= (unsigned long *)end;  in in_exception_stack()
131 	info->next_sp	= (unsigned long *)regs->sp;  in in_exception_stack()
141 	 * @end points directly to the top most stack entry to avoid a -8  in in_irq_stack()
146 	begin = end - (IRQ_STACK_SIZE / sizeof(long));  in in_irq_stack()
156 	info->type	= STACK_TYPE_IRQ;  in in_irq_stack()
157 	info->begin	= begin;  in in_irq_stack()
158 	info->end	= end;  in in_irq_stack()
165 	info->next_sp = (unsigned long *)*(end - 1);  in in_irq_stack()
208 		if (*visit_mask & (1UL << info->type)) {  in get_stack_info()
210 				printk_deferred_once(KERN_WARNING "WARNING: stack recursion on stack type %d\n", info->type);  in get_stack_info()
213 		*visit_mask |= 1UL << info->type;  in get_stack_info()
219 	info->type = STACK_TYPE_UNKNOWN;  in get_stack_info()
220 	return -EINVAL;  in get_stack_info()