linux/arch/x86/kernel/dumpstack_64.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
 */
#include <linux/sched/debug.h>
#include <linux/kallsyms.h>
#include <linux/kprobes.h>
#include <linux/uaccess.h>
#include <linux/hardirq.h>
#include <linux/kdebug.h>
#include <linux/export.h>
#include <linux/ptrace.h>
#include <linux/kexec.h>
#include <linux/sysfs.h>
#include <linux/bug.h>
#include <linux/nmi.h>

#include <asm/cpu_entry_area.h>
#include <asm/stacktrace.h>

static const char * const exception_stack_names[] = …;

const char *stack_type_name(enum stack_type type)
{ … }

/**
 * struct estack_pages - Page descriptor for exception stacks
 * @offs:	Offset from the start of the exception stack area
 * @size:	Size of the exception stack
 * @type:	Type to store in the stack_info struct
 */
struct estack_pages { … };

#define EPAGERANGE(st) …

/*
 * Array of exception stack page descriptors. If the stack is larger than
 * PAGE_SIZE, all pages covering a particular stack will have the same
 * info. The guard pages including the not mapped DB2 stack are zeroed
 * out.
 */
static const
struct estack_pages estack_pages[CEA_ESTACK_PAGES] ____cacheline_aligned = …;

static __always_inline bool in_exception_stack(unsigned long *stack, struct stack_info *info)
{ … }

static __always_inline bool in_irq_stack(unsigned long *stack, struct stack_info *info)
{ … }

bool noinstr get_stack_info_noinstr(unsigned long *stack, struct task_struct *task,
				    struct stack_info *info)
{ … }

int get_stack_info(unsigned long *stack, struct task_struct *task,
		   struct stack_info *info, unsigned long *visit_mask)
{ … }