linux/arch/x86/purgatory/purgatory.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * purgatory: Runs between two kernels
 *
 * Copyright (C) 2014 Red Hat Inc.
 *
 * Author:
 *       Vivek Goyal <[email protected]>
 */

#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <crypto/sha2.h>
#include <asm/purgatory.h>

#include "../boot/compressed/error.h"
#include "../boot/string.h"

u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE] __section(…);

struct kexec_sha_region purgatory_sha_regions[KEXEC_SEGMENT_MAX] __section(…);

static int verify_sha256_digest(void)
{ … }

void purgatory(void)
{ … }

/*
 * Defined in order to reuse memcpy() and memset() from
 * arch/x86/boot/compressed/string.c
 */
void warn(const char *msg) { … }