diff options
Diffstat (limited to 'util')
| -rw-r--r-- | util/cbfstool/cbfs.h | 3 | ||||
| -rw-r--r-- | util/cbfstool/cbfs_image.c | 154 | ||||
| -rw-r--r-- | util/cbfstool/cbfs_image.h | 39 | ||||
| -rw-r--r-- | util/cbfstool/cbfstool.c | 519 | ||||
| -rw-r--r-- | util/cbfstool/common.h | 2 |
5 files changed, 563 insertions, 154 deletions
diff --git a/util/cbfstool/cbfs.h b/util/cbfstool/cbfs.h index f26b14c50a..ef3959450a 100644 --- a/util/cbfstool/cbfs.h +++ b/util/cbfstool/cbfs.h @@ -32,6 +32,9 @@ #define makemagic(b3, b2, b1, b0)\ (((b3)<<24) | ((b2) << 16) | ((b1) << 8) | (b0)) +// Alignment (in bytes) to be used when no master header is present +#define CBFS_ENTRY_ALIGNMENT 64 + #define CBFS_HEADER_MAGIC 0x4F524243 #define CBFS_HEADPTR_ADDR_X86 0xFFFFFFFC #define CBFS_HEADER_VERSION1 0x31313131 diff --git a/util/cbfstool/cbfs_image.c b/util/cbfstool/cbfs_image.c index d07f80660f..4ecb461f5e 100644 --- a/util/cbfstool/cbfs_image.c +++ b/util/cbfstool/cbfs_image.c @@ -109,8 +109,11 @@ static size_t cbfs_calculate_file_header_size(const char *name) align_up(strlen(name) + 1, CBFS_FILENAME_ALIGN)); } +/* Only call on legacy CBFSes possessing a master header. */ static int cbfs_fix_legacy_size(struct cbfs_image *image, char *hdr_loc) { + assert(image); + assert(cbfs_is_legacy_cbfs(image)); // A bug in old cbfstool may produce extra few bytes (by alignment) and // cause cbfstool to overwrite things after free space -- which is // usually CBFS header on x86. We need to workaround that. @@ -182,41 +185,78 @@ void cbfs_get_header(struct cbfs_header *header, void *src) header->architecture = xdr_be.get32(&outheader); } -int cbfs_image_create(struct cbfs_image *image, - uint32_t architecture, - uint32_t align, - struct buffer *bootblock, - uint32_t bootblock_offset, - uint32_t header_offset, - uint32_t entries_offset) +int cbfs_image_create(struct cbfs_image *image, size_t entries_size) { assert(image); assert(image->buffer.data); - assert(bootblock); - struct cbfs_file *entry; - int32_t *rel_offset; - uint32_t cbfs_len; - void *header_loc; - size_t empty_header_len; - size_t size = image->buffer.size; + size_t empty_header_len = cbfs_calculate_file_header_size(""); + uint32_t entries_offset = 0; + uint32_t align = CBFS_ENTRY_ALIGNMENT; + if (image->has_header) { + entries_offset = image->header.offset; - DEBUG("cbfs_image_create: bootblock=0x%x+0x%zx, " - "header=0x%x+0x%zx, entries_offset=0x%x\n", - bootblock_offset, bootblock->size, header_offset, - sizeof(image->header), entries_offset); + if (entries_offset > image->buffer.size) { + ERROR("CBFS file entries are located outside CBFS itself\n"); + return -1; + } + + align = image->header.align; + } // This attribute must be given in order to prove that this module // correctly preserves certain CBFS properties. See the block comment // near the top of this file (and the associated commit message). - empty_header_len = cbfs_calculate_file_header_size(""); if (align < empty_header_len) { ERROR("CBFS must be aligned to at least %zu bytes\n", empty_header_len); return -1; } - // Adjust legcay top-aligned address to ROM offset. + if (entries_size > image->buffer.size - entries_offset) { + ERROR("CBFS doesn't have enough space to fit its file entries\n"); + return -1; + } + + if (empty_header_len > entries_size) { + ERROR("CBFS is too small to fit any header\n"); + return -1; + } + struct cbfs_file *entry_header = + (struct cbfs_file *)(image->buffer.data + entries_offset); + // This alignment is necessary in order to prove that this module + // correctly preserves certain CBFS properties. See the block comment + // near the top of this file (and the associated commit message). + entries_size -= entries_size % align; + + size_t capacity = entries_size - empty_header_len; + LOG("Created CBFS (capacity = %zu bytes)\n", capacity); + return cbfs_create_empty_entry(entry_header, capacity, ""); +} + +int cbfs_legacy_image_create(struct cbfs_image *image, + uint32_t architecture, + uint32_t align, + struct buffer *bootblock, + uint32_t bootblock_offset, + uint32_t header_offset, + uint32_t entries_offset) +{ + assert(image); + assert(image->buffer.data); + assert(bootblock); + + int32_t *rel_offset; + uint32_t cbfs_len; + void *header_loc; + size_t size = image->buffer.size; + + DEBUG("cbfs_image_create: bootblock=0x%x+0x%zx, " + "header=0x%x+0x%zx, entries_offset=0x%x\n", + bootblock_offset, bootblock->size, header_offset, + sizeof(image->header), entries_offset); + + // Adjust legacy top-aligned address to ROM offset. if (IS_TOP_ALIGNED_ADDRESS(entries_offset)) entries_offset = size + (int32_t)entries_offset; if (IS_TOP_ALIGNED_ADDRESS(bootblock_offset)) @@ -259,6 +299,7 @@ int cbfs_image_create(struct cbfs_image *image, header_loc = (image->buffer.data + header_offset); cbfs_put_header(header_loc, &image->header); + image->has_header = true; // The last 4 byte of the image contain the relative offset from the end // of the image to the master header as a 32-bit signed integer. x86 @@ -274,12 +315,6 @@ int cbfs_image_create(struct cbfs_image *image, entries_offset, align); return -1; } - if (entries_offset + empty_header_len > size) { - ERROR("Offset (0x%x+0x%zx) exceed ROM size(0x%zx)\n", - entries_offset, empty_header_len, size); - return -1; - } - entry = (struct cbfs_file *)(image->buffer.data + entries_offset); // To calculate available length, find // e = min(bootblock, header, rel_offset) where e > entries_offset. cbfs_len = size - sizeof(int32_t); @@ -287,13 +322,9 @@ int cbfs_image_create(struct cbfs_image *image, cbfs_len = bootblock_offset; if (header_offset > entries_offset && header_offset < cbfs_len) cbfs_len = header_offset; - // This alignment is necessary in order to prove that this module - // correctly preserves certain CBFS properties. See the block comment - // near the top of this file (and the associated commit message). - cbfs_len -= cbfs_len % align; - cbfs_len -= entries_offset + empty_header_len; - cbfs_create_empty_entry(entry, cbfs_len, ""); - LOG("Created CBFS image (capacity = %d bytes)\n", cbfs_len); + + if (cbfs_image_create(image, cbfs_len - entries_offset)) + return -1; return 0; } @@ -305,17 +336,31 @@ int cbfs_image_from_buffer(struct cbfs_image *out, struct buffer *in, assert(in->data); buffer_clone(&out->buffer, in); + out->has_header = false; + void *header_loc = cbfs_find_header(in->data, in->size, offset); if (header_loc) { cbfs_get_header(&out->header, header_loc); + out->has_header = true; cbfs_fix_legacy_size(out, header_loc); + } else if (offset != ~0u) { + ERROR("The -H switch is only valid on legacy images having CBFS master headers.\n"); + return 1; + } else if (!cbfs_is_valid_cbfs(out)) { + ERROR("Selected image region is not a valid CBFS.\n"); + return 1; } - return !header_loc; + + return 0; } int cbfs_copy_instance(struct cbfs_image *image, size_t copy_offset, size_t copy_size) { + assert(image); + if (!cbfs_is_legacy_cbfs(image)) + return -1; + struct cbfs_file *src_entry, *dst_entry; struct cbfs_header *copy_header; size_t align, entry_offset; @@ -411,7 +456,8 @@ static int cbfs_add_entry_at(struct cbfs_image *image, uint32_t header_size = cbfs_calculate_file_header_size(name), min_entry_size = cbfs_calculate_file_header_size(""); uint32_t len, target; - uint32_t align = image->header.align; + uint32_t align = image->has_header ? image->header.align : + CBFS_ENTRY_ALIGNMENT; target = content_offset - header_size; if (target % align) @@ -492,6 +538,11 @@ int cbfs_add_entry(struct cbfs_image *image, struct buffer *buffer, name, content_offset, header_size, buffer->size, need_size); if (IS_TOP_ALIGNED_ADDRESS(content_offset)) { + if (!cbfs_is_legacy_cbfs(image)) { + ERROR("Top-aligned offsets are only supported for legacy CBFSes (with master headers)\n"); + return -1; + } + // legacy cbfstool takes top-aligned address. uint32_t theromsize = image->header.romsize; INFO("Converting top-aligned address 0x%x to offset: 0x%x\n", @@ -798,7 +849,8 @@ int cbfs_print_entry_info(struct cbfs_image *image, struct cbfs_file *entry, int cbfs_print_directory(struct cbfs_image *image) { - cbfs_print_header_info(image); + if (cbfs_is_legacy_cbfs(image)) + cbfs_print_header_info(image); printf("%-30s %-10s %-12s Size\n", "Name", "Offset", "Type"); cbfs_walk(image, cbfs_print_entry_info, NULL); return 0; @@ -923,15 +975,17 @@ struct cbfs_header *cbfs_find_header(char *data, size_t size, struct cbfs_file *cbfs_find_first_entry(struct cbfs_image *image) { assert(image); - return (struct cbfs_file *)(image->buffer.data + - image->header.offset); + return image->has_header ? (struct cbfs_file *)(image->buffer.data + + image->header.offset) : + (struct cbfs_file *)image->buffer.data; } struct cbfs_file *cbfs_find_next_entry(struct cbfs_image *image, struct cbfs_file *entry) { uint32_t addr = cbfs_get_entry_addr(image, entry); - int align = image->header.align; + int align = image->has_header ? image->header.align : + CBFS_ENTRY_ALIGNMENT; assert(entry && cbfs_is_valid_entry(image, entry)); addr += ntohl(entry->offset) + ntohl(entry->len); addr = align_up(addr, align); @@ -944,6 +998,17 @@ uint32_t cbfs_get_entry_addr(struct cbfs_image *image, struct cbfs_file *entry) return (int32_t)((char *)entry - image->buffer.data); } +int cbfs_is_valid_cbfs(struct cbfs_image *image) +{ + return buffer_check_magic(&image->buffer, CBFS_FILE_MAGIC, + strlen(CBFS_FILE_MAGIC)); +} + +int cbfs_is_legacy_cbfs(struct cbfs_image *image) +{ + return image->has_header; +} + int cbfs_is_valid_entry(struct cbfs_image *image, struct cbfs_file *entry) { uint32_t offset = cbfs_get_entry_addr(image, entry); @@ -955,7 +1020,7 @@ int cbfs_is_valid_entry(struct cbfs_image *image, struct cbfs_file *entry) buffer_clone(&entry_data, &image->buffer); buffer_seek(&entry_data, offset); return buffer_check_magic(&entry_data, CBFS_FILE_MAGIC, - strlen(CBFS_FILE_MAGIC)); + strlen(CBFS_FILE_MAGIC)); } int cbfs_create_empty_entry(struct cbfs_file *entry, @@ -999,7 +1064,8 @@ int32_t cbfs_locate_entry(struct cbfs_image *image, const char *name, /* Default values: allow fitting anywhere in ROM. */ if (!page_size) - page_size = image->header.romsize; + page_size = image->has_header ? image->header.romsize : + image->buffer.size; if (!align) align = 1; @@ -1007,9 +1073,11 @@ int32_t cbfs_locate_entry(struct cbfs_image *image, const char *name, ERROR("Input file size (%d) greater than page size (%d).\n", size, page_size); - if (page_size % image->header.align) + uint32_t image_align = image->has_header ? image->header.align : + CBFS_ENTRY_ALIGNMENT; + if (page_size % image_align) WARN("%s: Page size (%#x) not aligned with CBFS image (%#x).\n", - __func__, page_size, image->header.align); + __func__, page_size, image_align); /* TODO Old cbfstool always assume input is a stage file (and adding * sizeof(cbfs_stage) for header. We should fix that by adding "-t" diff --git a/util/cbfstool/cbfs_image.h b/util/cbfstool/cbfs_image.h index ddee3a7efc..024edc5dee 100644 --- a/util/cbfstool/cbfs_image.h +++ b/util/cbfstool/cbfs_image.h @@ -28,6 +28,9 @@ struct cbfs_image { struct buffer buffer; + /* An image has a header iff it's a legacy CBFS. */ + bool has_header; + /* Only meaningful if has_header is selected. */ struct cbfs_header header; }; @@ -37,18 +40,28 @@ void cbfs_put_header(void *dest, const struct cbfs_header *header); /* Or deserialize into host-native format */ void cbfs_get_header(struct cbfs_header *header, void *src); +/* Populates a CBFS with a single empty entry filling all available space + * (entries_size bytes). If image's header field is already present, its + * contents will be used to place an empty entry of the requested length at the + * appropriate position in the existing buffer; otherwise, if not has_header, + * the first entries_size bytes of buffer will be filled exclusively with the + * single empty entry (and no CBFS master header). + * Returns 0 on success, otherwise nonzero. */ +int cbfs_image_create(struct cbfs_image *image, size_t entries_size); + /* Creates an empty CBFS image by given size, and description to its content * (bootblock, align, header location, starting offset of CBFS entries). * The output image will contain a valid cbfs_header, with one cbfs_file * entry with type CBFS_COMPONENT_NULL, with max available size. - * Returns 0 on success, otherwise none-zero. */ -int cbfs_image_create(struct cbfs_image *image, - uint32_t arch, - uint32_t align, - struct buffer *bootblock, - uint32_t bootblock_offset, - uint32_t header_offset, - uint32_t entries_offset); + * Only call this if you want a legacy CBFS with a master header. + * Returns 0 on success, otherwise nonzero. */ +int cbfs_legacy_image_create(struct cbfs_image *image, + uint32_t arch, + uint32_t align, + struct buffer *bootblock, + uint32_t bootblock_offset, + uint32_t header_offset, + uint32_t entries_offset); /* Constructs a cbfs_image from a buffer. The resulting image contains a shallow * copy of the buffer; releasing either one is the legal way to clean up after @@ -57,7 +70,8 @@ int cbfs_image_create(struct cbfs_image *image, int cbfs_image_from_buffer(struct cbfs_image *out, struct buffer *in, uint32_t offset); -/* Create a duplicate CBFS image. Returns 0 on success, otherwise non-zero. */ +/* Create a duplicate CBFS image. Returns 0 on success, otherwise non-zero. + * Will not succeed on new-style images without a master header. */ int cbfs_copy_instance(struct cbfs_image *image, size_t copy_offset, size_t copy_size); @@ -74,6 +88,7 @@ int cbfs_export_entry(struct cbfs_image *image, const char *entry_name, /* Adds an entry to CBFS image by given name and type. If content_offset is * non-zero, try to align "content" (CBFS_SUBHEADER(p)) at content_offset. + * Note that top-aligned addresses are only supported for legacy CBFSes. * Returns 0 on success, otherwise non-zero. */ int cbfs_add_entry(struct cbfs_image *image, struct buffer *buffer, const char *name, uint32_t type, uint32_t content_offset); @@ -126,6 +141,12 @@ struct cbfs_file *cbfs_find_next_entry(struct cbfs_image *image, * This is different from entry->offset (pointer to content). */ uint32_t cbfs_get_entry_addr(struct cbfs_image *image, struct cbfs_file *entry); +/* Returns 1 if valid new-format CBFS (without a master header), otherwise 0. */ +int cbfs_is_valid_cbfs(struct cbfs_image *image); + +/* Returns 1 if valid legacy CBFS (with a master header), otherwise 0. */ +int cbfs_is_legacy_cbfs(struct cbfs_image *image); + /* Returns 1 if entry has valid data (by checking magic number), otherwise 0. */ int cbfs_is_valid_entry(struct cbfs_image *image, struct cbfs_file *entry); diff --git a/util/cbfstool/cbfstool.c b/util/cbfstool/cbfstool.c index a242a944c5..cb2f01a167 100644 --- a/util/cbfstool/cbfstool.c +++ b/util/cbfstool/cbfstool.c @@ -46,10 +46,12 @@ struct command { static struct param { partitioned_file_t *image_file; struct buffer *image_region; - char *name; - char *filename; - char *bootblock; - char *ignore_section; + const char *name; + const char *filename; + const char *fmap; + const char *region_name; + const char *bootblock; + const char *ignore_section; uint64_t u64val; uint32_t type; uint32_t baseaddress; @@ -65,8 +67,11 @@ static struct param { uint32_t pagesize; uint32_t cbfsoffset; uint32_t cbfsoffset_assigned; - uint32_t top_aligned; uint32_t arch; + bool top_aligned; + bool fill_partial_upward; + bool fill_partial_downward; + bool show_immutable; int fit_empty_entries; comp_algo algo; /* for linux payloads */ @@ -77,8 +82,22 @@ static struct param { .arch = CBFS_ARCHITECTURE_UNKNOWN, .algo = CBFS_COMPRESS_NONE, .headeroffset = ~0, + .region_name = SECTION_NAME_PRIMARY_CBFS, }; +static bool region_is_flashmap(const char *region) +{ + return partitioned_file_region_check_magic(param.image_file, region, + FMAP_SIGNATURE, strlen(FMAP_SIGNATURE)); +} + +/* @return Same as cbfs_is_valid_cbfs(), but for a named region. */ +static bool region_is_modern_cbfs(const char *region) +{ + return partitioned_file_region_check_magic(param.image_file, region, + CBFS_FILE_MAGIC, strlen(CBFS_FILE_MAGIC)); +} + typedef int (*convert_buffer_t)(struct buffer *buffer, uint32_t *offset); static int cbfs_add_integer_component(const char *name, @@ -147,10 +166,8 @@ static int cbfs_add_component(const char *filename, } struct cbfs_image image; - if (cbfs_image_from_buffer(&image, param.image_region, headeroffset)) { - ERROR("Selected image region is not a CBFS.\n"); + if (cbfs_image_from_buffer(&image, param.image_region, headeroffset)) return 1; - } struct buffer buffer; if (buffer_from_file(&buffer, filename) != 0) { @@ -307,10 +324,8 @@ static int cbfs_remove(void) struct cbfs_image image; if (cbfs_image_from_buffer(&image, param.image_region, - param.headeroffset)) { - ERROR("Selected image region is not a CBFS.\n"); + param.headeroffset)) return 1; - } if (cbfs_remove_entry(&image, param.name) != 0) { ERROR("Removing file '%s' failed.\n", @@ -323,6 +338,24 @@ static int cbfs_remove(void) static int cbfs_create(void) { + struct cbfs_image image; + memset(&image, 0, sizeof(image)); + buffer_clone(&image.buffer, param.image_region); + + if (param.fmap) { + if (param.arch != CBFS_ARCHITECTURE_UNKNOWN || param.size || + param.baseaddress_assigned || + param.headeroffset_assigned || + param.cbfsoffset_assigned || + param.alignment || + param.bootblock) { + ERROR("Since -M was provided, -m, -s, -b, -o, -H, -a, and -B should be omitted\n"); + return 1; + } + + return cbfs_image_create(&image, image.buffer.size); + } + if (param.arch == CBFS_ARCHITECTURE_UNKNOWN) { ERROR("You need to specify -m/--machine arch.\n"); return 1; @@ -343,9 +376,8 @@ static int cbfs_create(void) if (!param.baseaddress_assigned) { if (param.arch == CBFS_ARCHITECTURE_X86) { // Make sure there's at least enough room for rel_offset - param.baseaddress = param.size - ( - bootblock.size > sizeof(int32_t) ? - bootblock.size : sizeof(int32_t)); + param.baseaddress = param.size - + MAX(bootblock.size, sizeof(int32_t)); DEBUG("x86 -> bootblock lies at end of ROM (%#x).\n", param.baseaddress); } else { @@ -379,25 +411,15 @@ static int cbfs_create(void) } } - struct cbfs_image image; - if (!cbfs_image_from_buffer(&image, param.image_region, -1)) - // It *already* contains a CBFS?! This should be a blank file. - assert(false); - - if (cbfs_image_create(&image, - param.arch, - param.alignment, - &bootblock, - param.baseaddress, - param.headeroffset, - param.cbfsoffset) != 0) { - ERROR("Failed to initialize CBFS structure.\n"); - buffer_delete(&bootblock); - return 1; - } - + int ret = cbfs_legacy_image_create(&image, + param.arch, + param.alignment, + &bootblock, + param.baseaddress, + param.headeroffset, + param.cbfsoffset); buffer_delete(&bootblock); - return 0; + return ret; } static int cbfs_locate(void) @@ -414,8 +436,11 @@ static int cbfs_locate(void) struct cbfs_image image; if (cbfs_image_from_buffer(&image, param.image_region, - param.headeroffset)) { - ERROR("Selected image region is not a CBFS.\n"); + param.headeroffset)) + return 1; + + if (!cbfs_is_legacy_cbfs(&image) && param.top_aligned) { + ERROR("The -T switch is only valid on legacy images having CBFS master headers\n"); return 1; } @@ -445,15 +470,76 @@ static int cbfs_locate(void) return 0; } +static int cbfs_layout(void) +{ + const struct fmap *fmap = partitioned_file_get_fmap(param.image_file); + if (!fmap) { + LOG("This is a legacy image composed entirely of a single CBFS.\n"); + return 1; + } + + printf("This image contains the following sections that can be %s with this tool:\n", + param.show_immutable ? "accessed" : "manipulated"); + puts(""); + for (unsigned index = 0; index < fmap->nareas; ++index) { + const struct fmap_area *current = fmap->areas + index; + + bool readonly = partitioned_file_fmap_count(param.image_file, + partitioned_file_fmap_select_children_of, current) || + region_is_flashmap((const char *)current->name); + if (!param.show_immutable && readonly) + continue; + + printf("'%s'", current->name); + + // Detect consecutive sections that describe the same region and + // show them as aliases. This cannot find equivalent entries + // that aren't adjacent; however, fmaptool doesn't generate + // FMAPs with such sections, so this convenience feature works + // for all but the strangest manually created FMAP binaries. + // TODO: This could be done by parsing the FMAP into some kind + // of tree that had duplicate lists in addition to child lists, + // which would allow covering that weird, unlikely case as well. + unsigned lookahead; + for (lookahead = 1; index + lookahead < fmap->nareas; + ++lookahead) { + const struct fmap_area *consecutive = + fmap->areas + index + lookahead; + if (consecutive->offset != current->offset || + consecutive->size != current->size) + break; + printf(", '%s'", consecutive->name); + } + if (lookahead > 1) + fputs(" are aliases for the same region", stdout); + + const char *qualifier = ""; + if (readonly) + qualifier = "read-only, "; + else if (region_is_modern_cbfs((const char *)current->name)) + qualifier = "CBFS, "; + printf(" (%ssize %u)\n", qualifier, current->size); + + index += lookahead - 1; + } + puts(""); + + if (param.show_immutable) { + puts("It is at least possible to perform the read action on every section listed above."); + } else { + puts("It is possible to perform either the write action or the CBFS add/remove actions on every section listed above."); + puts("To see the image's read-only sections as well, rerun with the -w option."); + } + + return 0; +} + static int cbfs_print(void) { struct cbfs_image image; if (cbfs_image_from_buffer(&image, param.image_region, - param.headeroffset)) { - ERROR("Selected image region is not a CBFS.\n"); + param.headeroffset)) return 1; - } - cbfs_print_directory(&image); return 0; } @@ -472,14 +558,93 @@ static int cbfs_extract(void) struct cbfs_image image; if (cbfs_image_from_buffer(&image, param.image_region, - param.headeroffset)) { - ERROR("Selected image region is not a CBFS.\n"); + param.headeroffset)) return 1; - } return cbfs_export_entry(&image, param.name, param.filename); } +static int cbfs_write(void) +{ + if (!param.filename) { + ERROR("You need to specify a valid input -f/--file.\n"); + return 1; + } + if (!partitioned_file_is_partitioned(param.image_file)) { + ERROR("This operation isn't valid on legacy images having CBFS master headers\n"); + return 1; + } + + if (region_is_modern_cbfs(param.region_name)) { + ERROR("Target image region '%s' is a CBFS and must be manipulated using add and remove\n", + param.region_name); + return 1; + } + + struct buffer new_content; + if (buffer_from_file(&new_content, param.filename)) + return 1; + + if (buffer_check_magic(&new_content, FMAP_SIGNATURE, + strlen(FMAP_SIGNATURE))) { + ERROR("File '%s' appears to be an FMAP and cannot be added to an existing image\n", + param.filename); + buffer_delete(&new_content); + return 1; + } + if (buffer_check_magic(&new_content, CBFS_FILE_MAGIC, + strlen(CBFS_FILE_MAGIC))) { + ERROR("File '%s' appears to be a CBFS and cannot be inserted into a raw region\n", + param.filename); + buffer_delete(&new_content); + return 1; + } + + unsigned offset = 0; + if (param.fill_partial_upward && param.fill_partial_downward) { + ERROR("You may only specify one of -u and -d.\n"); + buffer_delete(&new_content); + return 1; + } else if (!param.fill_partial_upward && !param.fill_partial_downward) { + if (new_content.size != param.image_region->size) { + ERROR("File to add is %zu bytes and would not fill %zu-byte target region (did you mean to pass either -u or -d?)\n", + new_content.size, param.image_region->size); + buffer_delete(&new_content); + return 1; + } + } else { + if (new_content.size > param.image_region->size) { + ERROR("File to add is %zu bytes and would overflow %zu-byte target region\n", + new_content.size, param.image_region->size); + buffer_delete(&new_content); + return 1; + } + WARN("Written area will abut %s of target region: any unused space will keep its current contents\n", + param.fill_partial_upward ? "bottom" : "top"); + if (param.fill_partial_downward) + offset = param.image_region->size - new_content.size; + } + + memcpy(param.image_region->data + offset, new_content.data, + new_content.size); + buffer_delete(&new_content); + return 0; +} + +static int cbfs_read(void) +{ + if (!param.filename) { + ERROR("You need to specify a valid output -f/--file.\n"); + return 1; + } + if (!partitioned_file_is_partitioned(param.image_file)) { + ERROR("This operation isn't valid on legacy images having CBFS master headers\n"); + return 1; + } + + return buffer_write_file(param.image_region, param.filename); +} + static int cbfs_update_fit(void) { if (!param.name) { @@ -495,10 +660,8 @@ static int cbfs_update_fit(void) struct cbfs_image image; if (cbfs_image_from_buffer(&image, param.image_region, - param.headeroffset)) { - ERROR("Selected image region is not a CBFS.\n"); + param.headeroffset)) return 1; - } return fit_update_table(&image, param.fit_empty_entries, param.name); } @@ -517,28 +680,40 @@ static int cbfs_copy(void) struct cbfs_image image; if (cbfs_image_from_buffer(&image, param.image_region, - param.headeroffset)) { - ERROR("Selected image region is not a CBFS.\n"); + param.headeroffset)) + return 1; + + if (!cbfs_is_legacy_cbfs(&image)) { + ERROR("This operation is only valid on legacy images having CBFS master headers\n"); return 1; } return cbfs_copy_instance(&image, param.copyoffset, param.size); } +static bool cbfs_is_legacy_format(struct buffer *buffer) +{ + // Legacy CBFSes are those containing the deprecated CBFS master header. + return cbfs_find_header(buffer->data, buffer->size, -1); +} + static const struct command commands[] = { - {"add", "H:f:n:t:b:vh?", cbfs_add, true, true}, - {"add-flat-binary", "H:f:n:l:e:c:b:vh?", cbfs_add_flat_binary, true, + {"add", "H:r:f:n:t:b:vh?", cbfs_add, true, true}, + {"add-flat-binary", "H:r:f:n:l:e:c:b:vh?", cbfs_add_flat_binary, true, true}, - {"add-payload", "H:f:n:t:c:b:vh?C:I:", cbfs_add_payload, true, true}, - {"add-stage", "H:f:n:t:c:b:S:vh?", cbfs_add_stage, true, true}, - {"add-int", "H:i:n:b:vh?", cbfs_add_integer, true, true}, - {"copy", "H:D:s:", cbfs_copy, true, true}, - {"create", "s:B:b:H:a:o:m:vh?", cbfs_create, true, true}, - {"extract", "H:n:f:vh?", cbfs_extract, true, false}, - {"locate", "H:f:n:P:a:Tvh?", cbfs_locate, true, false}, - {"print", "H:vh?", cbfs_print, true, false}, - {"remove", "H:n:vh?", cbfs_remove, true, true}, - {"update-fit", "H:n:x:vh?", cbfs_update_fit, true, true}, + {"add-payload", "H:r:f:n:t:c:b:C:I:vh?", cbfs_add_payload, true, true}, + {"add-stage", "H:r:f:n:t:c:b:S:vh?", cbfs_add_stage, true, true}, + {"add-int", "H:r:i:n:b:vh?", cbfs_add_integer, true, true}, + {"copy", "H:D:s:h?", cbfs_copy, true, true}, + {"create", "M:r:s:B:b:H:a:o:m:vh?", cbfs_create, true, true}, + {"extract", "H:r:n:f:vh?", cbfs_extract, true, false}, + {"locate", "H:r:f:n:P:a:Tvh?", cbfs_locate, true, false}, + {"layout", "wvh?", cbfs_layout, false, false}, + {"print", "H:r:vh?", cbfs_print, true, false}, + {"read", "r:f:vh?", cbfs_read, true, false}, + {"remove", "H:r:n:vh?", cbfs_remove, true, true}, + {"update-fit", "H:r:n:x:vh?", cbfs_update_fit, true, true}, + {"write", "r:f:udvh?", cbfs_write, true, true}, }; static struct option long_options[] = { @@ -551,6 +726,10 @@ static struct option long_options[] = { {"empty-fits", required_argument, 0, 'x' }, {"entry-point", required_argument, 0, 'e' }, {"file", required_argument, 0, 'f' }, + {"fill-downward", no_argument, 0, 'd' }, + {"fill-upward", no_argument, 0, 'u' }, + {"flashmap", required_argument, 0, 'M' }, + {"fmap-regions", required_argument, 0, 'r' }, {"header-offset", required_argument, 0, 'H' }, {"help", no_argument, 0, 'h' }, {"ignore-sec", required_argument, 0, 'S' }, @@ -565,53 +744,121 @@ static struct option long_options[] = { {"top-aligned", required_argument, 0, 'T' }, {"type", required_argument, 0, 't' }, {"verbose", no_argument, 0, 'v' }, + {"with-readonly", no_argument, 0, 'w' }, {NULL, 0, 0, 0 } }; +static int dispatch_command(struct command command) +{ + if (command.accesses_region) { + assert(param.image_file); + + if (partitioned_file_is_partitioned(param.image_file)) { + LOG("Performing operation on '%s' region...\n", + param.region_name); + } + if (!partitioned_file_read_region(param.image_region, + param.image_file, param.region_name)) { + ERROR("The image will be left unmodified.\n"); + return 1; + } + + if (command.modifies_region) { + // We (intentionally) don't support overwriting the FMAP + // section. If you find yourself wanting to do this, + // consider creating a new image rather than performing + // whatever hacky transformation you were planning. + if (region_is_flashmap(param.region_name)) { + ERROR("Image region '%s' is read-only because it contains the FMAP.\n", + param.region_name); + ERROR("The image will be left unmodified.\n"); + return 1; + } + // We don't allow writing raw data to regions that + // contain nested regions, since doing so would + // overwrite all such subregions. + if (partitioned_file_region_contains_nested( + param.image_file, param.region_name)) { + ERROR("Image region '%s' is read-only because it contains nested regions.\n", + param.region_name); + ERROR("The image will be left unmodified.\n"); + return 1; + } + } + } + + if (command.function()) { + if (partitioned_file_is_partitioned(param.image_file)) { + ERROR("Failed while operating on '%s' region!\n", + param.region_name); + ERROR("The image will be left unmodified.\n"); + } + return 1; + } + + return 0; +} + static void usage(char *name) { printf ("cbfstool: Management utility for CBFS formatted ROM images\n\n" "USAGE:\n" " %s [-h]\n" " %s FILE COMMAND [-v] [PARAMETERS]...\n\n" "OPTIONs:\n" - " -H header_offset Do not search for header, use this offset\n" - " -T Output top-aligned memory address\n" - " -v Provide verbose output\n" - " -h Display this help message\n\n" + " -H header_offset Do not search for header; use this offset*\n" + " -T Output top-aligned memory address*\n" + " -u Accept short data; fill upward/from bottom\n" + " -d Accept short data; fill downward/from top\n" + " -v Provide verbose output\n" + " -h Display this help message\n\n" "COMMANDs:\n" - " add -f FILE -n NAME -t TYPE [-b base-address] " + " add [-r image,regions] -f FILE -n NAME -t TYPE \\\n" + " [-b base-address] " "Add a component\n" - " add-payload -f FILE -n NAME [-c compression] [-b base] " + " add-payload [-r image,regions] -f FILE -n NAME \\\n" + " [-c compression] [-b base-address] " "Add a payload to the ROM\n" " (linux specific: [-C cmdline] [-I initrd])\n" - " add-stage -f FILE -n NAME [-c compression] [-b base] \\\n" - " [-S section-to-ignore] " + " add-stage [-r image,regions] -f FILE -n NAME \\\n" + " [-c compression] [-b base] [-S section-to-ignore] " "Add a stage to the ROM\n" - " add-flat-binary -f FILE -n NAME -l load-address \\\n" - " -e entry-point [-c compression] [-b base] " + " add-flat-binary [-r image,regions] -f FILE -n NAME \\\n" + " -l load-address -e entry-point [-c compression] \\\n" + " [-b base] " "Add a 32bit flat mode binary\n" - " add-int -i INTEGER -n NAME [-b base] " + " add-int [-r image,regions] -i INTEGER -n NAME [-b base] " "Add a raw 64-bit integer value\n" - " remove -n NAME " + " remove [-r image,regions] -n NAME " "Remove a component\n" " copy -D new_header_offset -s region size \\\n" - " [-H source header offset] " - "Create a copy (duplicate) cbfs instance\n" - " create -s size -m ARCH [-B bootblock] [-b bootblock offset] \\\n" - " [-o CBFS offset] [-H header offset] [-a align] " - "Create a ROM file\n" - " locate -f FILE -n NAME [-P page-size] [-a align] [-T] " + " [-H source header offset] " + "Create a copy (duplicate) cbfs instance*\n" + " create -m ARCH -s size [-b bootblock offset] \\\n" + " [-o CBFS offset] [-H header offset] [-B bootblock] \\\n" + " [-a align] " + "Create a legacy ROM file with CBFS master header*\n" + " create -M flashmap [-r list,of,regions,containing,cbfses] " + "Create a new-style partitioned firmware image\n" + " locate [-r image,regions] -f FILE -n NAME [-P page-size] \\\n" + " [-a align] [-T] " "Find a place for a file of that size\n" - " print " + " layout [-w] " + "List mutable (or, with -w, readable) image regions\n" + " print [-r image,regions] " "Show the contents of the ROM\n" - " extract -n NAME -f FILE " + " extract [-r image,regions] -n NAME -f FILE " "Extracts a raw payload from ROM\n" - " update-fit -n MICROCODE_BLOB_NAME -x EMTPY_FIT_ENTRIES\n " + " write -r image,regions -f file [-u | -d] " + "Write file into same-size [or larger] raw region\n" + " read [-r fmap-region] -f file " + "Extract raw region contents into binary file\n" + " update-fit [-r image,regions] -n MICROCODE_BLOB_NAME \\\n" + " -x EMTPY_FIT_ENTRIES " "Updates the FIT table with microcode entries\n" "\n" "OFFSETs:\n" " Numbers accompanying -b, -H, and -o switches may be provided\n" - " in two possible formats: if their value is greater than\n" + " in two possible formats*: if their value is greater than\n" " 0x80000000, they are interpreted as a top-aligned x86 memory\n" " address; otherwise, they are treated as an offset into flash.\n" "ARCHes:\n" @@ -619,6 +866,22 @@ static void usage(char *name) "TYPEs:\n", name, name ); print_supported_filetypes(); + + printf( + "\n* Note that these actions and switches are only valid when\n" + " working with legacy images whose structure is described\n" + " primarily by a CBFS master header. New-style images, in\n" + " contrast, exclusively make use of an FMAP to describe their\n" + " layout: this must minimally contain an '%s' section\n" + " specifying the location of this FMAP itself and a '%s'\n" + " section describing the primary CBFS. It should also be noted\n" + " that, when working with such images, the -F and -r switches\n" + " default to '%s' for convenience, and both the -b switch to\n" + " CBFS operations and the output of the locate action become\n" + " relative to the selected CBFS region's lowest address.\n", + SECTION_NAME_FMAP, SECTION_NAME_PRIMARY_CBFS, + SECTION_NAME_PRIMARY_CBFS + ); } int main(int argc, char **argv) @@ -678,6 +941,12 @@ int main(int argc, char **argv) WARN("Unknown compression '%s'" " ignored.\n", optarg); break; + case 'M': + param.fmap = optarg; + break; + case 'r': + param.region_name = optarg; + break; case 'b': param.baseaddress = strtoul(optarg, NULL, 0); // baseaddress may be zero on non-x86, so we @@ -729,7 +998,16 @@ int main(int argc, char **argv) param.u64val = strtoull(optarg, NULL, 0); break; case 'T': - param.top_aligned = 1; + param.top_aligned = true; + break; + case 'u': + param.fill_partial_upward = true; + break; + case 'd': + param.fill_partial_downward = true; + break; + case 'w': + param.show_immutable = true; break; case 'x': param.fit_empty_entries = strtol(optarg, NULL, 0); @@ -759,20 +1037,33 @@ int main(int argc, char **argv) } if (commands[i].function == cbfs_create) { - if (param.size == 0) { - ERROR("You need to specify a valid -s/--size.\n"); + if (param.fmap) { + struct buffer flashmap; + if (buffer_from_file(&flashmap, param.fmap)) + return 1; + param.image_file = partitioned_file_create( + image_name, &flashmap); + buffer_delete(&flashmap); + } else if (param.size) { + param.image_file = partitioned_file_create_flat( + image_name, param.size); + } else { + ERROR("You need to specify a valid -M/--flashmap or -s/--size.\n"); return 1; } - param.image_file = partitioned_file_create_flat( - image_name, param.size); } else { param.image_file = partitioned_file_reopen(image_name, - partitioned_file_open_as_flat); + cbfs_is_legacy_format); } if (!param.image_file) return 1; + unsigned num_regions = 1; + for (const char *list = strchr(param.region_name, ','); list; + list = strchr(list + 1, ',')) + ++num_regions; + // If the action needs to read an image region, as indicated by // having accesses_region set in its command struct, that // region's buffer struct will be stored here and the client @@ -781,36 +1072,60 @@ int main(int argc, char **argv) // since this behavior can be requested via its modifies_region // field. Additionally, it should never free the region buffer, // as that is performed automatically once it completes. - struct buffer image_region; - memset(&image_region, 0, sizeof(image_region)); + struct buffer image_regions[num_regions]; + memset(image_regions, 0, sizeof(image_regions)); + + bool seen_primary_cbfs = false; + char region_name_scratch[strlen(param.region_name) + 1]; + strcpy(region_name_scratch, param.region_name); + param.region_name = strtok(region_name_scratch, ","); + for (unsigned region = 0; region < num_regions; ++region) { + if (!param.region_name) { + ERROR("Encountered illegal degenerate region name in -r list\n"); + ERROR("The image will be left unmodified.\n"); + partitioned_file_close(param.image_file); + return 1; + } - if (commands[i].accesses_region) { - assert(param.image_file); + if (strcmp(param.region_name, SECTION_NAME_PRIMARY_CBFS) + == 0) + seen_primary_cbfs = true; - if (!partitioned_file_read_region(&image_region, - param.image_file, SECTION_NAME_PRIMARY_CBFS)) { + param.image_region = image_regions + region; + if (dispatch_command(commands[i])) { partitioned_file_close(param.image_file); return 1; } - param.image_region = &image_region; + + param.region_name = strtok(NULL, ","); } - int error = commands[i].function(); + if (commands[i].function == cbfs_create && !seen_primary_cbfs) { + ERROR("The creation -r list must include the mandatory '%s' section.\n", + SECTION_NAME_PRIMARY_CBFS); + ERROR("The image will be left unmodified.\n"); + partitioned_file_close(param.image_file); + return 1; + } - if (!error && commands[i].modifies_region) { + if (commands[i].modifies_region) { assert(param.image_file); assert(commands[i].accesses_region); - - if (!partitioned_file_write_region(param.image_file, - &image_region)) { - partitioned_file_close(param.image_file); - return 1; + for (unsigned region = 0; region < num_regions; + ++region) { + + if (!partitioned_file_write_region( + param.image_file, + image_regions + region)) { + partitioned_file_close( + param.image_file); + return 1; + } } } partitioned_file_close(param.image_file); - - return error; + return 0; } ERROR("Unknown command '%s'.\n", cmd); diff --git a/util/cbfstool/common.h b/util/cbfstool/common.h index 416d0a44d4..831d3eb088 100644 --- a/util/cbfstool/common.h +++ b/util/cbfstool/common.h @@ -47,6 +47,8 @@ extern int verbose; /* Helpers */ #define ARRAY_SIZE(a) (int)(sizeof(a) / sizeof((a)[0])) #define ALIGN(val, by) (((val) + (by)-1)&~((by)-1)) +#define MAX(x, y) ((x) > (y) ? (x) : (y)) +#define MIN(x, y) ((x) < (y) ? (x) : (y)) #define unused __attribute__((unused)) |