From 9b4fc4cae9fa0cd0cd9060e1c9d33320c3249ced Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Thu, 1 Apr 2021 17:06:47 +0200 Subject: firmware-utils: bcm4908img: convert into a package MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit bcm4908img is a tool managing BCM4908 platform images. It's used for creating them as well as checking, modifying and extracting data from. It's required by both: host (for building firmware images) and target (for sysupgrade purposes). Make it a host/target package. Signed-off-by: Rafał Miłecki --- package/utils/bcm4908img/Makefile | 52 ++ package/utils/bcm4908img/src/Makefile | 7 + package/utils/bcm4908img/src/bcm4908img.c | 997 ++++++++++++++++++++++++++++++ 3 files changed, 1056 insertions(+) create mode 100644 package/utils/bcm4908img/Makefile create mode 100644 package/utils/bcm4908img/src/Makefile create mode 100644 package/utils/bcm4908img/src/bcm4908img.c (limited to 'package/utils') diff --git a/package/utils/bcm4908img/Makefile b/package/utils/bcm4908img/Makefile new file mode 100644 index 0000000000..108fe600e5 --- /dev/null +++ b/package/utils/bcm4908img/Makefile @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: GPL-2.0-only + +include $(TOPDIR)/rules.mk + +PKG_NAME:=bcm4908img +PKG_RELEASE:=1 + +PKG_BUILD_DEPENDS := bcm4908img/host + +include $(INCLUDE_DIR)/package.mk +include $(INCLUDE_DIR)/host-build.mk + +define Package/bcm4908img + SECTION:=utils + CATEGORY:=Base system + TITLE:=Utility handling BCM4908 images + MAINTAINER:=Rafał Miłecki + DEPENDS:=@TARGET_bcm4908 +endef + +define Package/bcm4908img/description + CFE bootloader for BCM4908 uses custom image format. It consists of: + 1. Optional cferom image + 2. bootfs JFFS2 partition (cferam, kernel, DTB and optional helper files) + 3. padding + 4. rootfs simply appended to the bootfs + padding + 5. tail with checksum and basic device info + + This util allows creating, modifying and extracting from BCM4908 images. +endef + +define Host/Prepare + $(CP) ./src/* $(HOST_BUILD_DIR) +endef + +define Build/Compile + $(MAKE) -C $(PKG_BUILD_DIR) \ + CC="$(TARGET_CC)" \ + CFLAGS="$(TARGET_CFLAGS) -Wall" +endef + +define Package/bcm4908img/install + $(INSTALL_DIR) $(1)/usr/bin + $(INSTALL_BIN) $(PKG_BUILD_DIR)/bcm4908img $(1)/usr/bin/ +endef + +define Host/Install + $(INSTALL_BIN) $(HOST_BUILD_DIR)/bcm4908img $(STAGING_DIR_HOST)/bin/ +endef + +$(eval $(call BuildPackage,bcm4908img)) +$(eval $(call HostBuild)) diff --git a/package/utils/bcm4908img/src/Makefile b/package/utils/bcm4908img/src/Makefile new file mode 100644 index 0000000000..72f8e30d68 --- /dev/null +++ b/package/utils/bcm4908img/src/Makefile @@ -0,0 +1,7 @@ +all: bcm4908img + +bcm4908img: + $(CC) $(CFLAGS) -o $@ bcm4908img.c -Wall + +clean: + rm -f bcm4908img diff --git a/package/utils/bcm4908img/src/bcm4908img.c b/package/utils/bcm4908img/src/bcm4908img.c new file mode 100644 index 0000000000..402d317190 --- /dev/null +++ b/package/utils/bcm4908img/src/bcm4908img.c @@ -0,0 +1,997 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2021 Rafał Miłecki + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#if !defined(__BYTE_ORDER) +#error "Unknown byte order" +#endif + +#if __BYTE_ORDER == __BIG_ENDIAN +#define cpu_to_le32(x) bswap_32(x) +#define le32_to_cpu(x) bswap_32(x) +#define cpu_to_be32(x) (x) +#define be32_to_cpu(x) (x) +#define cpu_to_le16(x) bswap_16(x) +#define le16_to_cpu(x) bswap_16(x) +#define cpu_to_be16(x) (x) +#define be16_to_cpu(x) (x) +#elif __BYTE_ORDER == __LITTLE_ENDIAN +#define cpu_to_le32(x) (x) +#define le32_to_cpu(x) (x) +#define cpu_to_be32(x) bswap_32(x) +#define be32_to_cpu(x) bswap_32(x) +#define cpu_to_le16(x) (x) +#define le16_to_cpu(x) (x) +#define cpu_to_be16(x) bswap_16(x) +#define be16_to_cpu(x) bswap_16(x) +#else +#error "Unsupported endianness" +#endif + +#define WFI_VERSION 0x00005732 +#define WFI_VERSION_NAND_1MB_DATA 0x00005731 + +#define WFI_NOR_FLASH 1 +#define WFI_NAND16_FLASH 2 +#define WFI_NAND128_FLASH 3 +#define WFI_NAND256_FLASH 4 +#define WFI_NAND512_FLASH 5 +#define WFI_NAND1024_FLASH 6 +#define WFI_NAND2048_FLASH 7 + +#define WFI_FLAG_HAS_PMC 0x1 +#define WFI_FLAG_SUPPORTS_BTRM 0x2 + +#define UBI_EC_HDR_MAGIC 0x55424923 + +static int debug; + +struct bcm4908img_tail { + uint32_t crc32; + uint32_t version; + uint32_t chip_id; + uint32_t flash_type; + uint32_t flags; +}; + +/** + * struct bcm4908img_info - info about BCM4908 image + * + * Standard BCM4908 image consists of: + * 1. (Optional) vedor header + * 2. (Optional) cferom + * 3. bootfs ─┐ + * 4. padding ├─ firmware + * 5. rootfs ─┘ + * 6. BCM4908 tail + */ +struct bcm4908img_info { + size_t file_size; + size_t cferom_offset; + size_t bootfs_offset; + size_t padding_offset; + size_t rootfs_offset; + uint32_t crc32; /* Calculated checksum */ + struct bcm4908img_tail tail; +}; + +char *pathname; + +static inline size_t bcm4908img_min(size_t x, size_t y) { + return x < y ? x : y; +} + +/************************************************** + * CRC32 + **************************************************/ + +static const uint32_t crc32_tbl[] = { + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, + 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, + 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, + 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, + 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, + 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, + 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, + 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, + 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, + 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, + 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, + 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, + 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, + 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, + 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, + 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, + 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, + 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, + 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, + 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, + 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, + 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, + 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, + 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, + 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, + 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, + 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, + 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, + 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, + 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, + 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, + 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, + 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, + 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, + 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, + 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, + 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, + 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, + 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, + 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, + 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, + 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, + 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, + 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, + 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, + 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, + 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, + 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, + 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, + 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, + 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, + 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, +}; + +uint32_t bcm4908img_crc32(uint32_t crc, const void *buf, size_t len) { + const uint8_t *in = buf; + + while (len) { + crc = crc32_tbl[(crc ^ *in) & 0xff] ^ (crc >> 8); + in++; + len--; + } + + return crc; +} + +/************************************************** + * Helpers + **************************************************/ + +static FILE *bcm4908img_open(const char *pathname, const char *mode) { + struct stat st; + + if (pathname) + return fopen(pathname, mode); + + if (isatty(fileno(stdin))) { + fprintf(stderr, "Reading from TTY stdin is unsupported\n"); + return NULL; + } + + if (fstat(fileno(stdin), &st)) { + fprintf(stderr, "Failed to fstat stdin: %d\n", -errno); + return NULL; + } + + if (S_ISFIFO(st.st_mode)) { + fprintf(stderr, "Reading from pipe stdin is unsupported\n"); + return NULL; + } + + return stdin; +} + +static void bcm4908img_close(FILE *fp) { + if (fp != stdin) + fclose(fp); +} + +static int bcm4908img_calc_crc32(FILE *fp, struct bcm4908img_info *info) { + uint8_t buf[1024]; + size_t length; + size_t bytes; + + /* Start with cferom (or bootfs) - skip vendor header */ + fseek(fp, info->cferom_offset, SEEK_SET); + + info->crc32 = 0xffffffff; + length = info->file_size - info->cferom_offset - sizeof(struct bcm4908img_tail); + while (length && (bytes = fread(buf, 1, bcm4908img_min(sizeof(buf), length), fp)) > 0) { + info->crc32 = bcm4908img_crc32(info->crc32, buf, bytes); + length -= bytes; + } + if (length) { + fprintf(stderr, "Failed to read last %zd B of data\n", length); + return -EIO; + } + + return 0; +} + +/************************************************** + * Existing firmware parser + **************************************************/ + +struct chk_header { + uint32_t magic; + uint32_t header_len; + uint8_t reserved[8]; + uint32_t kernel_chksum; + uint32_t rootfs_chksum; + uint32_t kernel_len; + uint32_t rootfs_len; + uint32_t image_chksum; + uint32_t header_chksum; + char board_id[0]; +}; + +static bool bcm4908img_is_all_ff(const void *buf, size_t length) +{ + const uint8_t *in = buf; + int i; + + for (i = 0; i < length; i++) { + if (in[i] != 0xff) + return false; + } + + return true; +} + +static int bcm4908img_parse(FILE *fp, struct bcm4908img_info *info) { + struct bcm4908img_tail *tail = &info->tail; + struct chk_header *chk; + struct stat st; + uint8_t buf[1024]; + uint16_t tmp16; + size_t length; + size_t bytes; + int err = 0; + + memset(info, 0, sizeof(*info)); + + /* File size */ + + if (fstat(fileno(fp), &st)) { + err = -errno; + fprintf(stderr, "Failed to fstat: %d\n", err); + return err; + } + info->file_size = st.st_size; + + /* Vendor formats */ + + rewind(fp); + if (fread(buf, 1, sizeof(buf), fp) != sizeof(buf)) { + fprintf(stderr, "Failed to read file header\n"); + return -EIO; + } + chk = (void *)buf; + if (be32_to_cpu(chk->magic) == 0x2a23245e) + info->cferom_offset = be32_to_cpu(chk->header_len); + + /* Offsets */ + + for (info->bootfs_offset = info->cferom_offset; + info->bootfs_offset < info->file_size; + info->bootfs_offset += 0x20000) { + if (fseek(fp, info->bootfs_offset, SEEK_SET)) { + err = -errno; + fprintf(stderr, "Failed to fseek to the 0x%zx\n", info->bootfs_offset); + return err; + } + if (fread(&tmp16, 1, sizeof(tmp16), fp) != sizeof(tmp16)) { + fprintf(stderr, "Failed to read while looking for JFFS2\n"); + return -EIO; + } + if (be16_to_cpu(tmp16) == 0x8519) + break; + } + if (info->bootfs_offset >= info->file_size) { + fprintf(stderr, "Failed to find bootfs offset\n"); + return -EPROTO; + } + + for (info->rootfs_offset = info->bootfs_offset; + info->rootfs_offset < info->file_size; + info->rootfs_offset += 0x20000) { + uint32_t *magic = (uint32_t *)&buf[0]; + + if (fseek(fp, info->rootfs_offset, SEEK_SET)) { + err = -errno; + fprintf(stderr, "Failed to fseek: %d\n", err); + return err; + } + + length = info->padding_offset ? sizeof(*magic) : 256; + bytes = fread(buf, 1, length, fp); + if (bytes != length) { + fprintf(stderr, "Failed to read %zu bytes\n", length); + return -EIO; + } + + if (!info->padding_offset && bcm4908img_is_all_ff(buf, length)) + info->padding_offset = info->rootfs_offset; + + if (be32_to_cpu(*magic) == UBI_EC_HDR_MAGIC) + break; + } + if (info->rootfs_offset >= info->file_size) { + fprintf(stderr, "Failed to find rootfs offset\n"); + return -EPROTO; + } + + /* CRC32 */ + + /* Start with cferom (or bootfs) - skip vendor header */ + fseek(fp, info->cferom_offset, SEEK_SET); + + info->crc32 = 0xffffffff; + length = info->file_size - info->cferom_offset - sizeof(*tail); + while (length && (bytes = fread(buf, 1, bcm4908img_min(sizeof(buf), length), fp)) > 0) { + info->crc32 = bcm4908img_crc32(info->crc32, buf, bytes); + length -= bytes; + } + if (length) { + fprintf(stderr, "Failed to read last %zd B of data\n", length); + return -EIO; + } + + /* Tail */ + + if (fread(tail, 1, sizeof(*tail), fp) != sizeof(*tail)) { + fprintf(stderr, "Failed to read BCM4908 image tail\n"); + return -EIO; + } + + /* Standard validation */ + + if (info->crc32 != le32_to_cpu(tail->crc32)) { + fprintf(stderr, "Invalid data crc32: 0x%08x instead of 0x%08x\n", info->crc32, le32_to_cpu(tail->crc32)); + return -EPROTO; + } + + return 0; +} + +/************************************************** + * Info + **************************************************/ + +static int bcm4908img_info(int argc, char **argv) { + struct bcm4908img_info info; + const char *pathname = NULL; + FILE *fp; + int c; + int err = 0; + + while ((c = getopt(argc, argv, "i:")) != -1) { + switch (c) { + case 'i': + pathname = optarg; + break; + } + } + + fp = bcm4908img_open(pathname, "r"); + if (!fp) { + fprintf(stderr, "Failed to open BCM4908 image\n"); + err = -EACCES; + goto out; + } + + err = bcm4908img_parse(fp, &info); + if (err) { + fprintf(stderr, "Failed to parse BCM4908 image\n"); + goto err_close; + } + + if (info.bootfs_offset != info.cferom_offset) + printf("cferom offset:\t%zu\n", info.cferom_offset); + printf("bootfs offset:\t0x%zx\n", info.bootfs_offset); + if (info.padding_offset) + printf("padding offset:\t0x%zx\n", info.padding_offset); + printf("rootfs offset:\t0x%zx\n", info.rootfs_offset); + printf("Checksum:\t0x%08x\n", info.crc32); + +err_close: + bcm4908img_close(fp); +out: + return err; +} + +/************************************************** + * Create + **************************************************/ + +static ssize_t bcm4908img_create_append_file(FILE *trx, const char *in_path, uint32_t *crc32) { + FILE *in; + size_t bytes; + ssize_t length = 0; + uint8_t buf[1024]; + + in = fopen(in_path, "r"); + if (!in) { + fprintf(stderr, "Failed to open %s\n", in_path); + return -EACCES; + } + + while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) { + if (fwrite(buf, 1, bytes, trx) != bytes) { + fprintf(stderr, "Failed to write %zu B to %s\n", bytes, pathname); + length = -EIO; + break; + } + *crc32 = bcm4908img_crc32(*crc32, buf, bytes); + length += bytes; + } + + fclose(in); + + return length; +} + +static ssize_t bcm4908img_create_append_zeros(FILE *trx, size_t length) { + uint8_t *buf; + + buf = malloc(length); + if (!buf) + return -ENOMEM; + memset(buf, 0, length); + + if (fwrite(buf, 1, length, trx) != length) { + fprintf(stderr, "Failed to write %zu B to %s\n", length, pathname); + free(buf); + return -EIO; + } + + free(buf); + + return length; +} + +static ssize_t bcm4908img_create_align(FILE *trx, size_t cur_offset, size_t alignment) { + if (cur_offset & (alignment - 1)) { + size_t length = alignment - (cur_offset % alignment); + return bcm4908img_create_append_zeros(trx, length); + } + + return 0; +} + +static int bcm4908img_create(int argc, char **argv) { + struct bcm4908img_tail tail = { + .version = cpu_to_le32(WFI_VERSION), + .chip_id = cpu_to_le32(0x4908), + .flash_type = cpu_to_le32(WFI_NAND128_FLASH), + .flags = cpu_to_le32(WFI_FLAG_SUPPORTS_BTRM), + }; + uint32_t crc32 = 0xffffffff; + size_t cur_offset = 0; + ssize_t bytes; + FILE *fp; + int c; + int err = 0; + + if (argc < 3) { + fprintf(stderr, "No BCM4908 image pathname passed\n"); + err = -EINVAL; + goto out; + } + pathname = argv[2]; + + fp = fopen(pathname, "w+"); + if (!fp) { + fprintf(stderr, "Failed to open %s\n", pathname); + err = -EACCES; + goto out; + } + + optind = 3; + while ((c = getopt(argc, argv, "f:a:A:")) != -1) { + switch (c) { + case 'f': + bytes = bcm4908img_create_append_file(fp, optarg, &crc32); + if (bytes < 0) { + fprintf(stderr, "Failed to append file %s\n", optarg); + } else { + cur_offset += bytes; + } + break; + case 'a': + bytes = bcm4908img_create_align(fp, cur_offset, strtol(optarg, NULL, 0)); + if (bytes < 0) + fprintf(stderr, "Failed to append zeros\n"); + else + cur_offset += bytes; + break; + case 'A': + bytes = strtol(optarg, NULL, 0) - cur_offset; + if (bytes < 0) { + fprintf(stderr, "Current BCM4908 image length is 0x%zx, can't pad it with zeros to 0x%lx\n", cur_offset, strtol(optarg, NULL, 0)); + } else { + bytes = bcm4908img_create_append_zeros(fp, bytes); + if (bytes < 0) + fprintf(stderr, "Failed to append zeros\n"); + else + cur_offset += bytes; + } + break; + } + if (err) + goto err_close; + } + + tail.crc32 = cpu_to_le32(crc32); + + bytes = fwrite(&tail, 1, sizeof(tail), fp); + if (bytes != sizeof(tail)) { + fprintf(stderr, "Failed to write BCM4908 image tail to %s\n", pathname); + return -EIO; + } + +err_close: + fclose(fp); +out: + return err; +} + +/************************************************** + * Extract + **************************************************/ + +static int bcm4908img_extract(int argc, char **argv) { + struct bcm4908img_info info; + const char *pathname = NULL; + const char *type = NULL; + uint8_t buf[1024]; + size_t offset; + size_t length; + size_t bytes; + FILE *fp; + int c; + int err = 0; + + while ((c = getopt(argc, argv, "i:t:")) != -1) { + switch (c) { + case 'i': + pathname = optarg; + break; + case 't': + type = optarg; + break; + } + } + + fp = bcm4908img_open(pathname, "r"); + if (!fp) { + fprintf(stderr, "Failed to open BCM4908 image\n"); + err = -EACCES; + goto err_out; + } + + err = bcm4908img_parse(fp, &info); + if (err) { + fprintf(stderr, "Failed to parse BCM4908 image\n"); + goto err_close; + } + + if (!type) { + err = -EINVAL; + fprintf(stderr, "No data to extract specified\n"); + goto err_close; + } else if (!strcmp(type, "cferom")) { + offset = info.cferom_offset; + length = info.bootfs_offset - offset; + if (!length) { + err = -ENOENT; + fprintf(stderr, "This BCM4908 image doesn't contain cferom\n"); + goto err_close; + } + } else if (!strcmp(type, "bootfs")) { + offset = info.bootfs_offset; + length = (info.padding_offset ? info.padding_offset : info.rootfs_offset) - offset; + } else if (!strcmp(type, "rootfs")) { + offset = info.rootfs_offset; + length = info.file_size - offset - sizeof(struct bcm4908img_tail); + } else if (!strcmp(type, "firmware")) { + offset = info.bootfs_offset; + length = info.file_size - offset - sizeof(struct bcm4908img_tail); + } else { + err = -EINVAL; + fprintf(stderr, "Unsupported extract type: %s\n", type); + goto err_close; + } + + if (!length) { + err = -EINVAL; + fprintf(stderr, "Failed to find requested data in input image\n"); + goto err_close; + } + + fseek(fp, offset, SEEK_SET); + while (length && (bytes = fread(buf, 1, bcm4908img_min(sizeof(buf), length), fp)) > 0) { + fwrite(buf, bytes, 1, stdout); + length -= bytes; + } + if (length) { + err = -EIO; + fprintf(stderr, "Failed to read last %zd B of data\n", length); + goto err_close; + } + +err_close: + bcm4908img_close(fp); +err_out: + return err; +} + +/************************************************** + * bootfs + **************************************************/ + +#define JFFS2_MAGIC_BITMASK 0x1985 + +#define JFFS2_COMPR_NONE 0x00 +#define JFFS2_COMPR_ZERO 0x01 +#define JFFS2_COMPR_RTIME 0x02 +#define JFFS2_COMPR_RUBINMIPS 0x03 +#define JFFS2_COMPR_COPY 0x04 +#define JFFS2_COMPR_DYNRUBIN 0x05 +#define JFFS2_COMPR_ZLIB 0x06 +#define JFFS2_COMPR_LZO 0x07 +/* Compatibility flags. */ +#define JFFS2_COMPAT_MASK 0xc000 /* What do to if an unknown nodetype is found */ +#define JFFS2_NODE_ACCURATE 0x2000 +/* INCOMPAT: Fail to mount the filesystem */ +#define JFFS2_FEATURE_INCOMPAT 0xc000 +/* ROCOMPAT: Mount read-only */ +#define JFFS2_FEATURE_ROCOMPAT 0x8000 +/* RWCOMPAT_COPY: Mount read/write, and copy the node when it's GC'd */ +#define JFFS2_FEATURE_RWCOMPAT_COPY 0x4000 +/* RWCOMPAT_DELETE: Mount read/write, and delete the node when it's GC'd */ +#define JFFS2_FEATURE_RWCOMPAT_DELETE 0x0000 + +#define JFFS2_NODETYPE_DIRENT (JFFS2_FEATURE_INCOMPAT | JFFS2_NODE_ACCURATE | 1) + +typedef struct { + uint32_t v32; +} __attribute__((packed)) jint32_t; + +typedef struct { + uint16_t v16; +} __attribute__((packed)) jint16_t; + +struct jffs2_unknown_node +{ + /* All start like this */ + jint16_t magic; + jint16_t nodetype; + jint32_t totlen; /* So we can skip over nodes we don't grok */ + jint32_t hdr_crc; +}; + +struct jffs2_raw_dirent +{ + jint16_t magic; + jint16_t nodetype; /* == JFFS2_NODETYPE_DIRENT */ + jint32_t totlen; + jint32_t hdr_crc; + jint32_t pino; + jint32_t version; + jint32_t ino; /* == zero for unlink */ + jint32_t mctime; + uint8_t nsize; + uint8_t type; + uint8_t unused[2]; + jint32_t node_crc; + jint32_t name_crc; + uint8_t name[0]; +}; + +#define je16_to_cpu(x) ((x).v16) +#define je32_to_cpu(x) ((x).v32) + +static int bcm4908img_bootfs_ls(FILE *fp, struct bcm4908img_info *info) { + struct jffs2_unknown_node node; + struct jffs2_raw_dirent dirent; + size_t offset; + size_t bytes; + int err = 0; + + for (offset = info->bootfs_offset; ; offset += (je32_to_cpu(node.totlen) + 0x03) & ~0x03) { + char name[FILENAME_MAX + 1]; + + if (fseek(fp, offset, SEEK_SET)) { + err = -errno; + fprintf(stderr, "Failed to fseek: %d\n", err); + return err; + } + + bytes = fread(&node, 1, sizeof(node), fp); + if (bytes != sizeof(node)) { + fprintf(stderr, "Failed to read %zu bytes\n", sizeof(node)); + return -EIO; + } + + if (je16_to_cpu(node.magic) != JFFS2_MAGIC_BITMASK) { + break; + } + + if (je16_to_cpu(node.nodetype) != JFFS2_NODETYPE_DIRENT) { + continue; + } + + memcpy(&dirent, &node, sizeof(node)); + bytes += fread((uint8_t *)&dirent + sizeof(node), 1, sizeof(dirent) - sizeof(node), fp); + if (bytes != sizeof(dirent)) { + fprintf(stderr, "Failed to read %zu bytes\n", sizeof(node)); + return -EIO; + } + + if (dirent.nsize + 1 > sizeof(name)) { + /* Keep reading & printing BUT exit with error code */ + fprintf(stderr, "Too long filename\n"); + err = -ENOMEM; + continue; + } + + bytes = fread(name, 1, dirent.nsize, fp); + if (bytes != dirent.nsize) { + fprintf(stderr, "Failed to read filename\n"); + return -EIO; + } + name[bytes] = '\0'; + + printf("%s\n", name); + } + + return err; +} + +static int bcm4908img_bootfs_mv(FILE *fp, struct bcm4908img_info *info, int argc, char **argv) { + struct jffs2_unknown_node node; + struct jffs2_raw_dirent dirent; + const char *oldname; + const char *newname; + size_t offset; + size_t bytes; + int err = -ENOENT; + + if (argc - optind < 2) { + fprintf(stderr, "No enough arguments passed\n"); + return -EINVAL; + } + oldname = argv[optind++]; + newname = argv[optind++]; + + if (strlen(newname) != strlen(oldname)) { + fprintf(stderr, "New filename must have the same length as the old one\n"); + return -EINVAL; + } + + for (offset = info->bootfs_offset; ; offset += (je32_to_cpu(node.totlen) + 0x03) & ~0x03) { + char name[FILENAME_MAX]; + uint32_t crc32; + + if (fseek(fp, offset, SEEK_SET)) { + err = -errno; + fprintf(stderr, "Failed to fseek: %d\n", err); + return err; + } + + bytes = fread(&node, 1, sizeof(node), fp); + if (bytes != sizeof(node)) { + fprintf(stderr, "Failed to read %zu bytes\n", sizeof(node)); + return -EIO; + } + + if (je16_to_cpu(node.magic) != JFFS2_MAGIC_BITMASK) { + break; + } + + if (je16_to_cpu(node.nodetype) != JFFS2_NODETYPE_DIRENT) { + continue; + } + + bytes += fread((uint8_t *)&dirent + sizeof(node), 1, sizeof(dirent) - sizeof(node), fp); + if (bytes != sizeof(dirent)) { + fprintf(stderr, "Failed to read %zu bytes\n", sizeof(node)); + return -EIO; + } + + if (dirent.nsize + 1 > sizeof(name)) { + fprintf(stderr, "Too long filename\n"); + err = -ENOMEM; + continue; + } + + bytes = fread(name, 1, dirent.nsize, fp); + if (bytes != dirent.nsize) { + fprintf(stderr, "Failed to read filename\n"); + return -EIO; + } + name[bytes] = '\0'; + + if (debug) + printf("offset:%08zx name_crc:%04x filename:%s\n", offset, je32_to_cpu(dirent.name_crc), name); + + if (strcmp(name, oldname)) { + continue; + } + + if (fseek(fp, offset + offsetof(struct jffs2_raw_dirent, name_crc), SEEK_SET)) { + err = -errno; + fprintf(stderr, "Failed to fseek: %d\n", err); + return err; + } + crc32 = bcm4908img_crc32(0, newname, dirent.nsize); + bytes = fwrite(&crc32, 1, sizeof(crc32), fp); + if (bytes != sizeof(crc32)) { + fprintf(stderr, "Failed to write new CRC32\n"); + return -EIO; + } + + if (fseek(fp, offset + offsetof(struct jffs2_raw_dirent, name), SEEK_SET)) { + err = -errno; + fprintf(stderr, "Failed to fseek: %d\n", err); + return err; + } + bytes = fwrite(newname, 1, dirent.nsize, fp); + if (bytes != dirent.nsize) { + fprintf(stderr, "Failed to write new filename\n"); + return -EIO; + } + + /* Calculate new BCM4908 image checksum */ + + err = bcm4908img_calc_crc32(fp, info); + if (err) { + fprintf(stderr, "Failed to write new filename\n"); + return err; + } + + info->tail.crc32 = cpu_to_le32(info->crc32); + if (fseek(fp, -sizeof(struct bcm4908img_tail), SEEK_END)) { + err = -errno; + fprintf(stderr, "Failed to write new filename\n"); + return err; + } + + if (fwrite(&info->tail, 1, sizeof(struct bcm4908img_tail), fp) != sizeof(struct bcm4908img_tail)) { + fprintf(stderr, "Failed to write updated tail\n"); + return -EIO; + } + + printf("Successfully renamed %s to the %s\n", oldname, newname); + + return 0; + } + + fprintf(stderr, "Failed to find %s\n", oldname); + + return -ENOENT; +} + +static int bcm4908img_bootfs(int argc, char **argv) { + struct bcm4908img_info info; + const char *pathname = NULL; + const char *mode; + const char *cmd; + FILE *fp; + int c; + int err = 0; + + while ((c = getopt(argc, argv, "i:")) != -1) { + switch (c) { + case 'i': + pathname = optarg; + break; + } + } + + if (argc - optind < 1) { + fprintf(stderr, "No bootfs command specified\n"); + err = -EINVAL; + goto out; + } + cmd = argv[optind++]; + + mode = strcmp(cmd, "mv") ? "r" : "r+"; + fp = bcm4908img_open(pathname, mode); + if (!fp) { + fprintf(stderr, "Failed to open BCM4908 image\n"); + err = -EACCES; + goto out; + } + + err = bcm4908img_parse(fp, &info); + if (err) { + fprintf(stderr, "Failed to parse BCM4908 image\n"); + goto err_close; + } + + if (!strcmp(cmd, "ls")) { + err = bcm4908img_bootfs_ls(fp, &info); + } else if (!strcmp(cmd, "mv")) { + err = bcm4908img_bootfs_mv(fp, &info, argc, argv); + } else { + err = -EINVAL; + fprintf(stderr, "Unsupported bootfs command: %s\n", cmd); + } + +err_close: + bcm4908img_close(fp); +out: + return err; +} + +/************************************************** + * Start + **************************************************/ + +static void usage() { + printf("Usage:\n"); + printf("\n"); + printf("Info about a BCM4908 image:\n"); + printf("\tbcm4908img info \n"); + printf("\t-i \t\t\t\tinput BCM490 image\n"); + printf("\n"); + printf("Creating a new BCM4908 image:\n"); + printf("\tbcm4908img create [options]\n"); + printf("\t-f file\t\t\t\tadd data from specified file\n"); + printf("\t-a alignment\t\t\tpad image with zeros to specified alignment\n"); + printf("\t-A offset\t\t\t\tappend zeros until reaching specified offset\n"); + printf("\n"); + printf("Extracting from a BCM4908 image:\n"); + printf("\tbcm4908img extract \n"); + printf("\t-i \t\t\t\tinput BCM490 image\n"); + printf("\t-t \t\t\t\tone of: cferom, bootfs, rootfs, firmware\n"); + printf("\n"); + printf("Access bootfs in a BCM4908 image:\n"); + printf("\tbcm4908img bootfs \n"); + printf("\t-i \t\t\t\tinput BCM490 image\n"); + printf("\tls\t\t\t\t\tlist bootfs files\n"); + printf("\tmv \t\t\trename bootfs file\n"); +} + +int main(int argc, char **argv) { + if (argc > 1) { + optind++; + if (!strcmp(argv[1], "info")) + return bcm4908img_info(argc, argv); + else if (!strcmp(argv[1], "create")) + return bcm4908img_create(argc, argv); + else if (!strcmp(argv[1], "extract")) + return bcm4908img_extract(argc, argv); + else if (!strcmp(argv[1], "bootfs")) + return bcm4908img_bootfs(argc, argv); + } + + usage(); + return 0; +} -- cgit v1.2.3