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1407 lines (1343 loc) · 42.8 KB
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/* image.h
*
* Functions to help with wolfBoot image header
*
*
* Copyright (C) 2025 wolfSSL Inc.
*
* This file is part of wolfBoot.
*
* wolfBoot is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* wolfBoot is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#ifndef IMAGE_H
#define IMAGE_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include "target.h"
#include "wolfboot/wolfboot.h"
#ifdef EXT_FLASH
#include "hal.h"
#endif
#if defined(EXT_ENCRYPTED) && (defined(__WOLFBOOT) || defined(UNIT_TEST))
#include "encrypt.h"
#endif
#ifndef WOLFBOOT_FLAGS_INVERT
#define SECT_FLAG_NEW 0x0F
#define SECT_FLAG_SWAPPING 0x07
#define SECT_FLAG_BACKUP 0x03
#define SECT_FLAG_UPDATED 0x00
#else
#define SECT_FLAG_NEW 0x00
#define SECT_FLAG_SWAPPING 0x08
#define SECT_FLAG_BACKUP 0x0c
#define SECT_FLAG_UPDATED 0x0f
#endif
#ifdef WOLFBOOT_SIGN_ED25519
#define wolfBoot_verify_signature_primary wolfBoot_verify_signature_ed25519
#endif
#ifdef WOLFBOOT_SIGN_ED448
#define wolfBoot_verify_signature_primary wolfBoot_verify_signature_ed448
#endif
#if defined (WOLFBOOT_SIGN_RSA2048) || \
defined (WOLFBOOT_SIGN_RSA3072) || \
defined (WOLFBOOT_SIGN_RSA4096) || \
defined (WOLFBOOT_SIGN_RSA2048ENC) || \
defined (WOLFBOOT_SIGN_RSA3072ENC) || \
defined (WOLFBOOT_SIGN_RSA4096ENC)
#define wolfBoot_verify_signature_primary wolfBoot_verify_signature_rsa
#endif
#if defined (WOLFBOOT_SIGN_ECC256) || \
defined (WOLFBOOT_SIGN_ECC384) || \
defined (WOLFBOOT_SIGN_ECC521)
#define wolfBoot_verify_signature_primary wolfBoot_verify_signature_ecc
#endif
#if defined(WOLFBOOT_SIGN_LMS)
#define wolfBoot_verify_signature_primary wolfBoot_verify_signature_lms
#endif
#if defined(WOLFBOOT_SIGN_XMSS )
#define wolfBoot_verify_signature_primary wolfBoot_verify_signature_xmss
#endif
#ifdef WOLFBOOT_SIGN_ML_DSA
#define wolfBoot_verify_signature_primary wolfBoot_verify_signature_ml_dsa
#endif
#ifdef WOLFBOOT_SIGN_SECONDARY_ED25519
#define wolfBoot_verify_signature_secondary wolfBoot_verify_signature_ed25519
#endif
#ifdef WOLFBOOT_SIGN_SECONDARY_ED448
#define wolfBoot_verify_signature_secondary wolfBoot_verify_signature_ed448
#endif
#if defined (WOLFBOOT_SIGN_SECONDARY_RSA2048) || \
defined (WOLFBOOT_SIGN_SECONDARY_RSA3072) || \
defined (WOLFBOOT_SIGN_SECONDARY_RSA4096) || \
defined (WOLFBOOT_SIGN_SECONDARY_RSA2048ENC) || \
defined (WOLFBOOT_SIGN_SECONDARY_RSA3072ENC) || \
defined (WOLFBOOT_SIGN_SECONDARY_RSA4096ENC)
#define wolfBoot_verify_signature_secondary wolfBoot_verify_signature_rsa
#endif
#if defined (WOLFBOOT_SIGN_SECONDARY_ECC256) || \
defined (WOLFBOOT_SIGN_SECONDARY_ECC384) || \
defined (WOLFBOOT_SIGN_SECONDARY_ECC521)
#define wolfBoot_verify_signature_secondary wolfBoot_verify_signature_ecc
#endif
#ifdef WOLFBOOT_SIGN_SECONDARY_LMS
#define wolfBoot_verify_signature_secondary wolfBoot_verify_signature_lms
#endif
#ifdef WOLFBOOT_SIGN_SECONDARY_XMSS
#define wolfBoot_verify_signature_secondary wolfBoot_verify_signature_xmss
#endif
#ifdef WOLFBOOT_SIGN_SECONDARY_ML_DSA
#define wolfBoot_verify_signature_secondary wolfBoot_verify_signature_ml_dsa
#endif
#if defined(WOLFBOOT_TPM) && defined (WOLFBOOT_TPM_VERIFY)
#undef wolfBoot_verify_signature_primary
#define wolfBoot_verify_signature_primary wolfBoot_verify_signature_tpm
#endif
/* Validate sector size is larger than image header size */
#if defined(WOLFBOOT_SECTOR_SIZE) && defined(IMAGE_HEADER_SIZE) && \
(WOLFBOOT_SECTOR_SIZE < IMAGE_HEADER_SIZE)
#error WOLFBOOT_SECTOR_SIZE must be larger than IMAGE_HEADER_SIZE
#endif
#if (defined(WOLFBOOT_ARMORED) && defined(__WOLFBOOT))
#if !defined(ARCH_ARM) || (!defined(__GNUC__) && \
!(defined(__ICCARM__) && defined(__IAR_SYSTEMS_ICC__)))
# error WOLFBOOT_ARMORED only available for ARM with IAR or gcc compilers
#endif
#if defined(__GNUC__)
#define likely(x) __builtin_expect((x),1)
#define unlikely(x) __builtin_expect((x),0)
#else
#define likely(x) (x)
#define unlikely(x) (x)
#endif
struct wolfBoot_image {
uint8_t *hdr;
#ifdef EXT_FLASH
uint8_t *hdr_cache;
#endif
uint8_t *trailer;
uint8_t *sha_hash;
uint8_t *fw_base;
uint32_t fw_size;
uint32_t part;
uint32_t hdr_ok;
uint32_t canary_FEED4567;
uint32_t signature_ok;
uint32_t canary_FEED6789;
uint32_t not_signature_ok;
uint32_t canary_FEED89AB;
uint32_t sha_ok;
uint32_t not_ext; /* image is no longer external */
};
/**
* This function sets the flag that indicates the signature is valid for the
* wolfBoot_image.
*
* With ARMORED setup, the flag is redundant, and the information is wrapped in
* between canary variables, to mitigate attacks based on memory corruptions.
*/
static void NOINLINEFUNCTION wolfBoot_image_confirm_signature_ok(
struct wolfBoot_image *img)
{
img->canary_FEED4567 = 0xFEED4567UL;
img->signature_ok = 1UL;
img->canary_FEED6789 = 0xFEED6789UL;
img->not_signature_ok = ~(1UL);
img->canary_FEED89AB = 0xFEED89ABUL;
}
static void NOINLINEFUNCTION wolfBoot_image_clear_signature_ok(
struct wolfBoot_image *img)
{
img->canary_FEED4567 = 0xFEED4567UL;
img->signature_ok = 0UL;
img->canary_FEED6789 = 0xFEED6789UL;
img->not_signature_ok = 1UL;
img->canary_FEED89AB = 0xFEED89ABUL;
}
/**
* Final sanity check, performed just before do_boot, or before starting an
* update that has been verified.
*
* This procedure detects if any of the previous checks has been skipped.
* If any of the required flags does not match the expected value, wolfBoot
* panics.
*/
#define PART_SANITY_CHECK(p) \
/* Redundant set of r2=0 */ \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
/* Loading hdr_ok flag, verifying */ \
asm volatile("mov r2, %0" ::"r"((p)->hdr_ok):"r2"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne ."); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-4"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-8"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-12"); \
/* Redundant set of r2=0 */ \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
/* Loading hdr_ok flag, verifying */ \
asm volatile("mov r2, %0" ::"r"((p)->sha_ok):"r2"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne ."); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-4"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-8"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-12"); \
/* Redundant set of r2=0 */ \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
/* Loading signature_ok flag, verifying */ \
asm volatile("mov r2, %0" ::"r"((p)->signature_ok):"r2"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne ."); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-4"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-8"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne .-12"); \
/* Redundant set of r2=0 */ \
asm volatile("mov r2, #0"); \
asm volatile("mov r2, #0"); \
asm volatile("mov r2, #0"); \
asm volatile("mov r2, #0"); \
asm volatile("mov r2, #0"); \
/* Loading ~(signature_ok) flag, verifying */ \
asm volatile("mov r2, %0" ::"r"((p)->not_signature_ok):"r2"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("bne ."); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("bne .-4"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("bne .-8"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r2, #0xFFFFFFFE":::"cc"); \
asm volatile("bne .-12"); \
/* Redundant set of r2=0 */ \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
/* Loading canary value, verifying */ \
asm volatile("mov r2, %0" ::"r"((p)->canary_FEED6789):"r2"); \
asm volatile("mov r0, %0" ::"r"(0xFEED6789):"r0"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne ."); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-4"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-8"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-12"); \
/* Redundant set of r2=0 */ \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
/* Loading canary value, verifying */ \
asm volatile("mov r2, %0" ::"r"((p)->canary_FEED4567):"r2"); \
asm volatile("mov r0, %0" ::"r"(0xFEED4567):"r0"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne ."); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-4"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-8"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-12"); \
/* Redundant set of r2=0 */ \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
asm volatile("mov r2, #0":::"r2"); \
/* Loading canary value, verifying */ \
asm volatile("mov r2, %0" ::"r"((p)->canary_FEED89AB):"r2"); \
asm volatile("mov r0, %0" ::"r"(0xFEED89AB):"r0"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne ."); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-4"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-8"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("cmp r2, r0":::"cc"); \
asm volatile("bne .-12") \
/**
* First part of RSA verification. Ensure that the function is called by
* double checking its return value contains a valid
* len (>= WOLFBOOT_SHA_DIGEST_SIZE).
*
*/
#define RSA_VERIFY_FN(ret,fn,...) \
{ \
/* Redundant set of r0=0 */ \
asm volatile("mov r0, #0":::"r0"); \
asm volatile("mov r0, #0":::"r0"); \
asm volatile("mov r0, #0":::"r0"); \
/* Call the function */ \
int tmp_ret = fn(__VA_ARGS__); \
ret = -1; \
/* Redundant set of r2=SHA_DIGEST_SIZE */ \
asm volatile("mov r2, %0" ::"r"(WOLFBOOT_SHA_DIGEST_SIZE):"r2"); \
asm volatile("mov r2, %0" ::"r"(WOLFBOOT_SHA_DIGEST_SIZE):"r2"); \
asm volatile("mov r2, %0" ::"r"(WOLFBOOT_SHA_DIGEST_SIZE):"r2"); \
/* Redundant check for fn() return value >= r2 */ \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("blt nope"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("blt nope"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("blt nope"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("cmp r0, r2":::"cc"); \
asm volatile("blt nope"); \
/* Return value is set here in case of success */ \
ret = tmp_ret; \
asm volatile("nope:"); \
asm volatile("nop"); \
}
/**
* Second part of RSA verification.
*
* Compare the digest twice, then confirm via
* wolfBoot_image_confirm_signature_ok();
*/
#define RSA_VERIFY_HASH(img,digest) \
{ \
volatile int compare_res; \
if (!img || !digest) \
asm volatile("b hnope"); \
/* Redundant set of r0=50*/ \
asm volatile("mov r0, #50":::"r0"); \
asm volatile("mov r0, #50":::"r0"); \
asm volatile("mov r0, #50":::"r0"); \
compare_res = image_CT_compare(digest, img->sha_hash, \
WOLFBOOT_SHA_DIGEST_SIZE); \
/* Redundant checks that ensure the function actually returned 0 */ \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne hnope":::"cc"); \
asm volatile("cmp r0, #0"); \
asm volatile("cmp r0, #0"); \
asm volatile("cmp r0, #0"); \
asm volatile("bne hnope":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne hnope"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne hnope"); \
/* Repeat comparison call */ \
compare_res = image_CT_compare(digest, img->sha_hash, \
WOLFBOOT_SHA_DIGEST_SIZE); \
compare_res; \
/* Redundant checks that ensure the function actually returned 0 */ \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne hnope"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne hnope"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne hnope"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne hnope"); \
/* Confirm that the signature is OK */ \
wolfBoot_image_confirm_signature_ok(img); \
asm volatile("hnope:"); \
asm volatile("nop"); \
}
/**
* ECC / Ed / PQ signature verification.
* Those verify functions set an additional value 'p_res'
* which is passed as a pointer.
*
* Ensure that the verification function has been called, and then
* set the return value accordingly.
*
* Double check by reading the value in p_res from memory a few times.
*/
#if defined(__GNUC__)
#define VERIFY_FN(img,p_res,fn,...) \
/* Redundant set of r0=50*/ \
asm volatile("mov r0, #50":::"r0"); \
asm volatile("mov r0, #50":::"r0"); \
asm volatile("mov r0, #50":::"r0"); \
/* Call the verify function */ \
fn(__VA_ARGS__); \
/* Redundant checks that ensure the function actually returned 0 */ \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne nope"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne nope"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne nope"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("cmp r0, #0":::"cc"); \
asm volatile("bne nope"); \
/* Check that res = 1, a few times, reading the value from memory */ \
asm volatile("ldr r2, [%0]" ::"r"(p_res)); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne nope"); \
asm volatile("mvn r3, r2":::"r3"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("bne nope"); \
asm volatile("ldr r2, [%0]" ::"r"(p_res)); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne nope"); \
asm volatile("mvn r3, r2":::"r3"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("bne nope"); \
asm volatile("ldr r2, [%0]" ::"r"(p_res)); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne nope"); \
asm volatile("mvn r3, r2":::"r3"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("bne nope"); \
asm volatile("ldr r2, [%0]" ::"r"(p_res)); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("cmp r2, #1":::"cc"); \
asm volatile("bne nope"); \
asm volatile("mvn r3, r2":::"r3"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("cmp r3, #0xFFFFFFFE":::"cc"); \
asm volatile("bne nope"); \
/* Confirm that the signature is OK */ \
wolfBoot_image_confirm_signature_ok(img); \
asm volatile("nope:"); \
asm volatile("nop") \
#elif defined(__ICCARM__) && defined(__IAR_SYSTEMS_ICC__)
#define VERIFY_FN(img, p_res, fn, ...) \
do { \
__asm volatile( \
"mov r0, #50\n" \
"mov r0, #50\n" \
"mov r0, #50\n" \
: /* No output operands */ \
: /* No input operands */ \
: "r0" /* Clobbered registers */ \
); \
void (*confirm_func)(struct wolfBoot_image *) = \
wolfBoot_image_confirm_signature_ok; \
fn(__VA_ARGS__); \
__asm volatile( \
"cmp r0, #0\n" \
"cmp r0, #0\n" \
"cmp r0, #0\n" \
"beq 30f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"30:\n" \
"ldr r2, [%0]\n" \
"cmp r2, #1\n" \
"cmp r2, #1\n" \
"cmp r2, #1\n" \
"beq 31f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"31:\n" \
"mvn r3, r2\n" \
"cmp r3, #0xFFFFFFFE\n" \
"cmp r3, #0xFFFFFFFE\n" \
"cmp r3, #0xFFFFFFFE\n" \
"beq 32f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"32:\n" \
"ldr r2, [%0]\n" \
"cmp r2, #1\n" \
"cmp r2, #1\n" \
"cmp r2, #1\n" \
"beq 33f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"33:\n" \
"mvn r3, r2\n" \
"cmp r3, #0xFFFFFFFE\n" \
"cmp r3, #0xFFFFFFFE\n" \
"cmp r3, #0xFFFFFFFE\n" \
"beq 34f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"34:\n" \
"ldr r2, [%0]\n" \
"cmp r2, #1\n" \
"cmp r2, #1\n" \
"cmp r2, #1\n" \
"beq 35f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"35:\n" \
"mvn r3, r2\n" \
"cmp r3, #0xFFFFFFFE\n" \
"cmp r3, #0xFFFFFFFE\n" \
"cmp r3, #0xFFFFFFFE\n" \
"beq 36f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"36:\n" \
"ldr r2, [%0]\n" \
"cmp r2, #1\n" \
"cmp r2, #1\n" \
"cmp r2, #1\n" \
"beq 37f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"37:\n" \
"mvn r3, r2\n" \
"cmp r3, #0xFFFFFFFE\n" \
"cmp r3, #0xFFFFFFFE\n" \
"cmp r3, #0xFFFFFFFE\n" \
"beq 38f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"38:\n" \
/* Load 'img' into r0 (first argument to the function) */ \
"mov r0, %1\n" \
/* Load the function pointer into r3 */ \
"mov r3, %2\n" \
"blx r3\n"\
"b 2f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"1:\n" \
"nop\n" \
"2:\n" \
: /* No output operands */ \
: "r"(p_res), "r"(img), "r"(confirm_func) /* Input operands */ \
: "r0", "r2", "r3", "lr" /* Clobbered registers */ \
); \
} while (0)
#endif
/**
* This macro is only invoked after a successful update version check, prior to
* initiating the update installation.
*
* At this point, wolfBoot thinks that the version check has been successful.
*
*
* The fallback flag (checked with redundancy) causes wolfBoot to skip the
* redundant version checks.
*
* The redundant checks here ensure that the image version is read twice per
* each partition, and the two return values are the same.
*
*
* The comparison is also redundant, causing wolfBoot to panic if the update
* version is not strictly greater than the current one.
*
*/
#if defined(__GNUC__)
#define VERIFY_VERSION_ALLOWED(fb_ok) \
asm volatile( \
"push {r4, r5, r6, r7}\n" \
"mov r0, #0\n" \
"mov r4, #1\n" \
"mov r5, #0\n" \
"mov r6, #2\n" \
"mov r7, #0\n" \
"mov r0, #0\n" \
"mov r4, #1\n" \
"mov r5, #0\n" \
"mov r6, #2\n" \
"mov r7, #0\n" \
"mov r0, %0\n" \
"mov r4, %0\n" \
"cmp r0, #1\n" \
"cmp r0, #1\n" \
"cmp r0, #1\n" \
"beq 20f\n" \
"bne do_check\n" \
"bne do_check\n" \
"bne do_check\n" \
"bne do_check\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"20:\n" \
"cmp r4, #1\n" \
"cmp r4, #1\n" \
"cmp r4, #1\n" \
"beq 21f\n" \
"bne do_check\n" \
"bne do_check\n" \
"bne do_check\n" \
"bne do_check\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"21:\n" \
"cmp r0, r4\n" \
"cmp r0, r4\n" \
"cmp r0, r4\n" \
"beq 22f\n" \
"bne do_check\n" \
"bne do_check\n" \
"bne do_check\n" \
"bne do_check\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"22:\n" \
"cmp r0, #1\n" \
"cmp r0, #1\n" \
"cmp r0, #1\n" \
"beq 23f\n" \
"bne do_check\n" \
"bne do_check\n" \
"bne do_check\n" \
"bne do_check\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"23:\n" \
"b end_check\n" \
"do_check:\n" \
"mov r0, #1\n" \
"mov r0, #1\n" \
"mov r0, #1\n" \
"bl wolfBoot_get_image_version\n" \
"mov r5, r0\n" \
"mov r5, r0\n" \
"mov r5, r0\n" \
"mov r0, #1\n" \
"mov r0, #1\n" \
"mov r0, #1\n" \
"bl wolfBoot_get_image_version\n" \
"mov r7, r0\n" \
"mov r7, r0\n" \
"mov r7, r0\n" \
"cmp r5, r7\n" \
"cmp r5, r7\n" \
"cmp r5, r7\n" \
"beq 24f\n" \
"bne ver_panic\n" \
"bne ver_panic\n" \
"bne ver_panic\n" \
"bne ver_panic\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"24:\n" \
"mov r0, #0\n" \
"mov r0, #0\n" \
"mov r0, #0\n" \
"bl wolfBoot_get_image_version\n" \
"mov r4, r0\n" \
"mov r4, r0\n" \
"mov r4, r0\n" \
"mov r0, #0\n" \
"mov r0, #0\n" \
"mov r0, #0\n" \
"bl wolfBoot_get_image_version\n" \
"mov r6, r0\n" \
"mov r6, r0\n" \
"mov r6, r0\n" \
"cmp r4, r6\n" \
"cmp r4, r6\n" \
"cmp r4, r6\n" \
"beq 25f\n" \
"bne ver_panic\n" \
"bne ver_panic\n" \
"bne ver_panic\n" \
"bne ver_panic\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"25:\n" \
"mov r0, #0\n" \
"mov r0, #0\n" \
"mov r0, #0\n" \
"cmp r4, r5\n" \
"cmp r4, r5\n" \
"cmp r4, r5\n" \
"blo 26f\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"26:\n" \
"cmp r6, r7\n" \
"cmp r6, r7\n" \
"cmp r6, r7\n" \
"blo 27f\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"27:\n" \
"cmp r4, r5\n" \
"cmp r4, r5\n" \
"cmp r4, r5\n" \
"blo 28f\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"28:\n" \
"cmp r6, r7\n" \
"cmp r6, r7\n" \
"cmp r6, r7\n" \
"blo 29f\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"bhs ver_panic\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"29:\n" \
"b end_check\n" \
"ver_panic:\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"end_check:\n" \
"pop {r4, r5, r6, r7}\n" \
: \
: "r"(fb_ok) \
: "r0", "r4", "r5", "r6", "r7", "lr", "cc", "memory" \
)
#elif defined(__ICCARM__) && defined(__IAR_SYSTEMS_ICC__)
#define VERIFY_VERSION_ALLOWED(fb_ok) \
do { \
__asm volatile( \
"push {r4, r5, r6, r7}\n" \
"mov r0, #0\n" \
"mov r4, #1\n" \
"mov r5, #0\n" \
"mov r6, #2\n" \
"mov r7, #0\n" \
"mov r0, #0\n" \
"mov r4, #1\n" \
"mov r5, #0\n" \
"mov r6, #2\n" \
"mov r7, #0\n" \
"mov r0, %0\n" \
"mov r4, %0\n" \
"cmp r0, #0\n" \
"cmp r0, #0\n" \
"cmp r0, #0\n" \
"beq 4f\n" \
"bne 6f\n" \
"bne 6f\n" \
"bne 6f\n" \
"bne 6f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"6:\n" \
"cmp r0, #1\n" \
"cmp r0, #1\n" \
"cmp r0, #1\n" \
"beq 4f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"4:\n" \
"cmp r4, #0\n" \
"cmp r4, #0\n" \
"cmp r4, #0\n" \
"beq 5f\n" \
"bne 7f\n" \
"bne 7f\n" \
"bne 7f\n" \
"bne 7f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"7:\n" \
"cmp r4, #1\n" \
"cmp r4, #1\n" \
"cmp r4, #1\n" \
"beq 5f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"5:\n" \
"cmp r0, #1\n" \
"cmp r0, #1\n" \
"cmp r0, #1\n" \
"beq 8f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"b .\n" \
"b .\n" \
"b .\n" \
"8:\n" \
"cmp r4, #1\n" \
"cmp r4, #1\n" \
"cmp r4, #1\n" \
"beq 9f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \
"bne 1f\n" \