isa0060/serio1/input0
  B   ˆl–Ü4ý( ©³( 	Å€fàB¦-ÿÂ„Dð_†I|¥+a–Ým_J*j"TânãNÜdJbÑ¿Â ?÷     // SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2015-2017 Josh Poimboeuf <jpoimboe@redhat.com>
 */

#include <string.h>
#include <stdlib.h>
#include <inttypes.h>
#include <sys/mman.h>

#include <objtool/builtin.h>
#include <objtool/cfi.h>
#include <objtool/arch.h>
#include <objtool/check.h>
#include <objtool/special.h>
#include <objtool/warn.h>
#include <objtool/endianness.h>

#include <linux/objtool_types.h>
#include <linux/hashtable.h>
#include <linux/kernel.h>
#include <linux/static_call_types.h>
#include <linux/string.h>

struct alternative {
	struct alternative *next;
	struct instruction *insn;
	bool skip_orig;
};

static unsigned long nr_cfi, nr_cfi_reused, nr_cfi_cache;

static struct cfi_init_state initial_func_cfi;
static struct cfi_state init_cfi;
static struct cfi_state func_cfi;
static struct cfi_state force_undefined_cfi;

struct instruction *find_insn(struct objtool_file *file,
			      struct section *sec, unsigned long offset)
{
	struct instruction *insn;

	hash_for_each_possible(file->insn_hash, insn, hash, sec_offset_hash(sec, offset)) {
		if (insn->sec == sec && insn->offset == offset)
			return insn;
	}

	return NULL;
}

struct instruction *next_insn_same_sec(struct objtool_file *file,
				       struct instruction *insn)
{
	if (insn->idx == INSN_CHUNK_MAX)
		return find_insn(file, insn->sec, insn->offset + insn->len);

	insn++;
	if (!insn->len)
		return NULL;

	return insn;
}

static struct instruction *next_insn_same_func(struct objtool_file *file,
					       struct instruction *insn)
{
	struct instruction *next = next_insn_same_sec(file, insn);
	struct symbol *func = insn_func(insn);

	if (!func)
		return NULL;

	if (next && insn_func(next) == func)
		return next;

	/* Check if we're already in the subfunction: */
	if (func == func->cfunc)
		return NULL;

	/* Move to the subfunction: */
	return find_insn(file, func->cfunc->sec, func->cfunc->offset);
}

static struct instruction *prev_insn_same_sec(struct objtool_file *file,
					      struct instruction *insn)
{
	if (insn->idx == 0) {
		if (insn->prev_len)
			return find_insn(file, insn->sec, insn->offset - insn->prev_len);
		return NULL;
	}

	return insn - 1;
}

static struct instruction *prev_insn_same_sym(struct objtool_file *file,
					      struct instruction *insn)
{
	struct instruction *prev = prev_insn_same_sec(file, insn);

	if (prev && insn_func(prev) == insn_func(insn))
		return prev;

	return NULL;
}

#define for_each_insn(file, insn)					\
	for (struct section *__sec, *__fake = (struct section *)1;	\
	     __fake; __fake = NULL)					\
		for_each_sec(file, __sec)				\
			sec_for_each_insn(file, __sec, insn)

#define func_for_each_insn(file, func, insn)				\
	for (insn = find_insn(file, func->sec, func->offset);		\
	     insn;							\
	     insn = next_insn_same_func(file, insn))

#define sym_for_each_insn(file, sym, insn)				\
	for (insn = find_insn(file, sym->sec, sym->offset);		\
	     insn && insn->offset < sym->offset + sym->len;		\
	     insn = next_insn_same_sec(file, insn))

#define sym_for_each_insn_continue_reverse(file, sym, insn)		\
	for (insn = prev_insn_same_sec(file, insn);			\
	     insn && insn->offset >= sym->offset;			\
	     insn = prev_insn_same_sec(file, insn))

#define sec_for_each_insn_from(file, insn)				\
	for (; insn; insn = next_insn_same_sec(file, insn))

#define sec_for_each_insn_continue(file, insn)				\
	for (insn = next_insn_same_sec(file, insn); insn;		\
	     insn = next_insn_same_sec(file, insn))

static inline struct symbol *insn_call_dest(struct instruction *insn)
{
	if (insn->type == INSN_JUMP_DYNAMIC ||
	    insn->type == INSN_CALL_DYNAMIC)
		return NULL;

	return insn->_call_dest;
}

static inline struct reloc *insn_jump_table(struct instruction *insn)
{
	if (insn->type == INSN_JUMP_DYNAMIC ||
	    insn->type == INSN_CALL_DYNAMIC)
		return insn->_jump_table;

	return NULL;
}

static inline unsigned long insn_jump_table_size(struct instruction *insn)
{
	if (insn->type == INSN_