| /* |
| * CBFS Image Manipulation |
| * |
| * Copyright (C) 2013 The Chromium OS Authors. All rights reserved. |
| * |
| * This program 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; version 2 of the License. |
| * |
| * This program 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 St, Fifth Floor, Boston, MA, 02110-1301 USA |
| */ |
| |
| #include <inttypes.h> |
| #include <libgen.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "common.h" |
| #include "elf.h" |
| #include "cbfs_image.h" |
| |
| /* The file name align is not defined in CBFS spec -- only a preference by |
| * (old) cbfstool. */ |
| #define CBFS_FILENAME_ALIGN (16) |
| |
| /* To make CBFS more friendly to ROM, fill -1 (0xFF) instead of zero. */ |
| #define CBFS_CONTENT_DEFAULT_VALUE (-1) |
| |
| /* Type and format */ |
| |
| struct typedesc_t { |
| uint32_t type; |
| const char *name; |
| }; |
| |
| static const struct typedesc_t types_cbfs_entry[] = { |
| {CBFS_COMPONENT_STAGE, "stage"}, |
| {CBFS_COMPONENT_PAYLOAD, "payload"}, |
| {CBFS_COMPONENT_OPTIONROM, "optionrom"}, |
| {CBFS_COMPONENT_BOOTSPLASH, "bootsplash"}, |
| {CBFS_COMPONENT_RAW, "raw"}, |
| {CBFS_COMPONENT_VSA, "vsa"}, |
| {CBFS_COMPONENT_MBI, "mbi"}, |
| {CBFS_COMPONENT_MICROCODE, "microcode"}, |
| {CBFS_COMPONENT_CMOS_DEFAULT, "cmos_default"}, |
| {CBFS_COMPONENT_CMOS_LAYOUT, "cmos_layout"}, |
| {CBFS_COMPONENT_DELETED, "deleted"}, |
| {CBFS_COMPONENT_NULL, "null"}, |
| {0, NULL}, |
| }; |
| |
| static const struct typedesc_t types_cbfs_compression[] = { |
| {CBFS_COMPRESS_NONE, "none"}, |
| {CBFS_COMPRESS_LZMA, "LZMA"}, |
| {0, NULL}, |
| }; |
| |
| static uint32_t align_up(uint32_t value, uint32_t align) |
| { |
| if (value % align) |
| value += align - (value % align); |
| return value; |
| } |
| |
| static uint32_t lookup_type_by_name(const struct typedesc_t *desc, const char *name, |
| uint32_t default_value) |
| { |
| int i; |
| for (i = 0; desc[i].name; i++) |
| if (strcmp(desc[i].name, name) == 0) |
| return desc[i].type; |
| return default_value; |
| } |
| |
| static const char *lookup_name_by_type(const struct typedesc_t *desc, uint32_t type, |
| const char *default_value) |
| { |
| int i; |
| for (i = 0; desc[i].name; i++) |
| if (desc[i].type == type) |
| return desc[i].name; |
| return default_value; |
| } |
| |
| uint32_t get_cbfs_entry_type(const char *name, uint32_t default_value) |
| { |
| return lookup_type_by_name(types_cbfs_entry, name, default_value); |
| } |
| |
| const char *get_cbfs_entry_type_name(uint32_t type) |
| { |
| return lookup_name_by_type(types_cbfs_entry, type, "(unknown)"); |
| } |
| |
| uint32_t get_cbfs_compression(const char *name, uint32_t unknown) |
| { |
| return lookup_type_by_name(types_cbfs_compression, name, unknown); |
| } |
| |
| /* CBFS image */ |
| |
| static int cbfs_calculate_file_header_size(const char *name) |
| { |
| return (sizeof(struct cbfs_file) + |
| align_up(strlen(name) + 1, CBFS_FILENAME_ALIGN)); |
| } |
| |
| static int cbfs_fix_legacy_size(struct cbfs_image *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. |
| |
| struct cbfs_file *entry, *first = NULL, *last = NULL; |
| for (first = entry = cbfs_find_first_entry(image); |
| entry && cbfs_is_valid_entry(image, entry); |
| entry = cbfs_find_next_entry(image, entry)) { |
| last = entry; |
| } |
| if ((char *)first < (char *)image->header && |
| (char *)entry > (char *)image->header) { |
| WARN("CBFS image was created with old cbfstool with size bug. " |
| "Fixing size in last entry...\n"); |
| last->len = htonl(ntohl(last->len) - |
| ntohl(image->header->align)); |
| DEBUG("Last entry has been changed from 0x%x to 0x%x.\n", |
| cbfs_get_entry_addr(image, entry), |
| cbfs_get_entry_addr(image, |
| cbfs_find_next_entry(image, last))); |
| } |
| return 0; |
| } |
| |
| int cbfs_image_create(struct cbfs_image *image, |
| uint32_t myarch, |
| size_t size, |
| uint32_t align, |
| struct buffer *bootblock, |
| int32_t bootblock_offset, |
| int32_t header_offset, |
| int32_t entries_offset) |
| { |
| struct cbfs_header *header; |
| struct cbfs_file *entry; |
| uint32_t cbfs_len; |
| size_t entry_header_len; |
| |
| 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(*header), entries_offset); |
| |
| if (buffer_create(&image->buffer, size, "(new)") != 0) |
| return -1; |
| image->header = NULL; |
| memset(image->buffer.data, CBFS_CONTENT_DEFAULT_VALUE, size); |
| |
| // Adjust legcay top-aligned address to ROM offset. |
| if (IS_TOP_ALIGNED_ADDRESS(entries_offset)) |
| entries_offset += (int32_t)size; |
| if (IS_TOP_ALIGNED_ADDRESS(bootblock_offset)) |
| bootblock_offset += (int32_t)size; |
| if (IS_TOP_ALIGNED_ADDRESS(header_offset)) |
| header_offset += (int32_t) size; |
| |
| DEBUG("cbfs_create_image: (real offset) bootblock=0x%x, " |
| "header=0x%x, entries_offset=0x%x\n", |
| bootblock_offset, header_offset, entries_offset); |
| |
| if (align == 0) |
| align = 64; // default align size. |
| |
| // Prepare bootblock |
| if (bootblock_offset + bootblock->size > size) { |
| ERROR("Bootblock (0x%x+0x%zx) exceed ROM size (0x%zx)\n", |
| bootblock_offset, bootblock->size, size); |
| return -1; |
| } |
| if (entries_offset > bootblock_offset && |
| entries_offset < bootblock->size) { |
| ERROR("Bootblock (0x%x+0x%zx) overlap CBFS data (0x%x)\n", |
| bootblock_offset, bootblock->size, entries_offset); |
| return -1; |
| } |
| memcpy(image->buffer.data + bootblock_offset, bootblock->data, |
| bootblock->size); |
| |
| // Prepare header |
| if (header_offset + sizeof(*header) > size) { |
| ERROR("Header (0x%x+0x%zx) exceed ROM size (0x%zx)\n", |
| header_offset, sizeof(*header), size); |
| return -1; |
| } |
| header = (struct cbfs_header *)(image->buffer.data + header_offset); |
| image->header = header; |
| header->magic = htonl(CBFS_HEADER_MAGIC); |
| header->version = htonl(CBFS_HEADER_VERSION); |
| header->romsize = htonl(size); |
| header->bootblocksize = htonl(bootblock->size); |
| header->align = htonl(align); |
| header->offset = htonl(entries_offset); |
| header->architecture = htonl(myarch); |
| |
| // Prepare entries |
| if (align_up(entries_offset, align) != entries_offset) { |
| ERROR("Offset (0x%x) must be aligned to 0x%x.\n", |
| entries_offset, align); |
| return -1; |
| } |
| entry_header_len = cbfs_calculate_file_header_size(""); |
| if (entries_offset + entry_header_len > size) { |
| ERROR("Offset (0x%x+0x%zx) exceed ROM size(0x%zx)\n", |
| entries_offset, entry_header_len, size); |
| return -1; |
| } |
| entry = (struct cbfs_file *)(image->buffer.data + entries_offset); |
| // To calculate available length, find |
| // e = min(bootblock, header, size) where e > entries_offset. |
| cbfs_len = size; |
| if (bootblock_offset > entries_offset && bootblock_offset < cbfs_len) |
| cbfs_len = bootblock_offset; |
| if (header_offset > entries_offset && header_offset < cbfs_len) |
| cbfs_len = header_offset; |
| cbfs_len -= entries_offset + align + entry_header_len; |
| cbfs_create_empty_entry(image, entry, cbfs_len, ""); |
| LOG("Created CBFS image (capacity = %d bytes)\n", cbfs_len); |
| return 0; |
| } |
| |
| int cbfs_image_from_file(struct cbfs_image *image, const char *filename) |
| { |
| if (buffer_from_file(&image->buffer, filename) != 0) |
| return -1; |
| DEBUG("read_cbfs_image: %s (%zd bytes)\n", image->buffer.name, |
| image->buffer.size); |
| image->header = cbfs_find_header(image->buffer.data, |
| image->buffer.size); |
| if (!image->header) { |
| ERROR("%s does not have CBFS master header.\n", filename); |
| cbfs_image_delete(image); |
| return -1; |
| } |
| cbfs_fix_legacy_size(image); |
| |
| return 0; |
| } |
| |
| int cbfs_image_write_file(struct cbfs_image *image, const char *filename) |
| { |
| assert(image && image->buffer.data); |
| return buffer_write_file(&image->buffer, filename); |
| } |
| |
| int cbfs_image_delete(struct cbfs_image *image) |
| { |
| buffer_delete(&image->buffer); |
| image->header = NULL; |
| return 0; |
| } |
| |
| /* Tries to add an entry with its data (CBFS_SUBHEADER) at given offset. */ |
| static int cbfs_add_entry_at(struct cbfs_image *image, |
| struct cbfs_file *entry, |
| uint32_t size, |
| const char *name, |
| uint32_t type, |
| const void *data, |
| uint32_t content_offset) |
| { |
| struct cbfs_file *next = cbfs_find_next_entry(image, entry); |
| uint32_t addr = cbfs_get_entry_addr(image, entry), |
| addr_next = cbfs_get_entry_addr(image, next); |
| 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 = ntohl(image->header->align); |
| |
| target = content_offset - header_size; |
| if (target % align) |
| target -= target % align; |
| if (target < addr) { |
| ERROR("No space to hold cbfs_file header."); |
| return -1; |
| } |
| |
| // Process buffer BEFORE content_offset. |
| if (target - addr > min_entry_size) { |
| DEBUG("|min|...|header|content|... <create new entry>\n"); |
| len = target - addr - min_entry_size; |
| cbfs_create_empty_entry(image, entry, len, ""); |
| if (verbose > 1) cbfs_print_entry_info(image, entry, stderr); |
| entry = cbfs_find_next_entry(image, entry); |
| addr = cbfs_get_entry_addr(image, entry); |
| } |
| |
| len = size + (content_offset - addr - header_size); |
| cbfs_create_empty_entry(image, entry, len, name); |
| if (len != size) { |
| DEBUG("|..|header|content|... <use offset to create entry>\n"); |
| DEBUG("before: offset=0x%x, len=0x%x\n", |
| ntohl(entry->offset), ntohl(entry->len)); |
| // TODO reset expanded name buffer to 0xFF. |
| entry->offset = htonl(ntohl(entry->offset) + (len - size)); |
| entry->len = htonl(size); |
| DEBUG("after: offset=0x%x, len=0x%x\n", |
| ntohl(entry->offset), ntohl(entry->len)); |
| } |
| |
| // Ready to fill data into entry. |
| assert(ntohl(entry->len) == size); |
| entry->type = htonl(type); |
| DEBUG("content_offset: 0x%x, entry location: %x\n", |
| content_offset, (int)((char*)CBFS_SUBHEADER(entry) - |
| image->buffer.data)); |
| assert((char*)CBFS_SUBHEADER(entry) - image->buffer.data == |
| content_offset); |
| memcpy(CBFS_SUBHEADER(entry), data, size); |
| if (verbose > 1) cbfs_print_entry_info(image, entry, stderr); |
| |
| // Process buffer AFTER entry. |
| entry = cbfs_find_next_entry(image, entry); |
| addr = cbfs_get_entry_addr(image, entry); |
| assert(addr < addr_next); |
| |
| if (addr_next - addr < min_entry_size) { |
| DEBUG("No space after content to keep CBFS structure.\n"); |
| return -1; |
| } |
| |
| len = addr_next - addr - min_entry_size; |
| cbfs_create_empty_entry(image, entry, len, ""); |
| if (verbose > 1) cbfs_print_entry_info(image, entry, stderr); |
| return 0; |
| } |
| |
| int cbfs_add_entry(struct cbfs_image *image, struct buffer *buffer, |
| const char *name, uint32_t type, uint32_t content_offset) |
| { |
| uint32_t entry_type; |
| uint32_t addr, addr_next; |
| struct cbfs_file *entry, *next; |
| uint32_t header_size, need_size, new_size; |
| |
| header_size = cbfs_calculate_file_header_size(name); |
| |
| need_size = header_size + buffer->size; |
| DEBUG("cbfs_add_entry('%s'@0x%x) => need_size = %u+%zu=%u\n", |
| name, content_offset, header_size, buffer->size, need_size); |
| |
| if (IS_TOP_ALIGNED_ADDRESS(content_offset)) { |
| // legacy cbfstool takes top-aligned address. |
| uint32_t theromsize = ntohl(image->header->romsize); |
| INFO("Converting top-aligned address 0x%x to offset: 0x%x\n", |
| content_offset, content_offset + theromsize); |
| content_offset += theromsize; |
| } |
| |
| // Merge empty entries. |
| DEBUG("(trying to merge empty entries...)\n"); |
| cbfs_walk(image, cbfs_merge_empty_entry, NULL); |
| |
| for (entry = cbfs_find_first_entry(image); |
| entry && cbfs_is_valid_entry(image, entry); |
| entry = cbfs_find_next_entry(image, entry)) { |
| |
| entry_type = ntohl(entry->type); |
| if (entry_type != CBFS_COMPONENT_NULL) |
| continue; |
| |
| addr = cbfs_get_entry_addr(image, entry); |
| next = cbfs_find_next_entry(image, entry); |
| addr_next = cbfs_get_entry_addr(image, next); |
| |
| DEBUG("cbfs_add_entry: space at 0x%x+0x%x(%d) bytes\n", |
| addr, addr_next - addr, addr_next - addr); |
| |
| /* Will the file fit? Don't yet worry if we have space for a new |
| * "empty" entry. We take care of that later. |
| */ |
| if (addr + need_size > addr_next) |
| continue; |
| |
| // Can we simply put object here? |
| if (!content_offset || content_offset == addr + header_size) { |
| DEBUG("Filling new entry data (%zd bytes).\n", |
| buffer->size); |
| cbfs_create_empty_entry(image, entry, buffer->size, |
| name); |
| entry->type = htonl(type); |
| memcpy(CBFS_SUBHEADER(entry), buffer->data, buffer->size); |
| if (verbose) |
| cbfs_print_entry_info(image, entry, stderr); |
| |
| // setup new entry |
| DEBUG("Setting new empty entry.\n"); |
| entry = cbfs_find_next_entry(image, entry); |
| new_size = (cbfs_get_entry_addr(image, next) - |
| cbfs_get_entry_addr(image, entry)); |
| |
| /* Entry was added and no space for new "empty" entry */ |
| if (new_size < cbfs_calculate_file_header_size("")) { |
| DEBUG("No need for new \"empty\" entry\n"); |
| /* No need to increase the size of the just |
| * stored file to extend to next file. Alignment |
| * of next file takes care of this. |
| */ |
| return 0; |
| } |
| new_size -= cbfs_calculate_file_header_size(""); |
| DEBUG("new size: %d\n", new_size); |
| cbfs_create_empty_entry(image, entry, new_size, ""); |
| if (verbose) |
| cbfs_print_entry_info(image, entry, stderr); |
| return 0; |
| } |
| |
| // We need to put content here, and the case is really |
| // complicated... |
| assert(content_offset); |
| if (addr_next < content_offset) { |
| DEBUG("Not for specified offset yet"); |
| continue; |
| } else if (addr > content_offset) { |
| DEBUG("Exceed specified content_offset."); |
| break; |
| } else if (addr + header_size > content_offset) { |
| ERROR("Not enough space for header.\n"); |
| break; |
| } else if (content_offset + buffer->size > addr_next) { |
| ERROR("Not enough space for content.\n"); |
| break; |
| } |
| |
| // TODO there are more few tricky cases that we may |
| // want to fit by altering offset. |
| DEBUG("section 0x%x+0x%x for content_offset 0x%x.\n", |
| addr, addr_next - addr, content_offset); |
| |
| if (cbfs_add_entry_at(image, entry, buffer->size, name, type, |
| buffer->data, content_offset) == 0) { |
| return 0; |
| } |
| break; |
| } |
| |
| ERROR("Could not add [%s, %zd bytes (%zd KB)@0x%x]; too big?\n", |
| buffer->name, buffer->size, buffer->size / 1024, content_offset); |
| return -1; |
| } |
| |
| struct cbfs_file *cbfs_get_entry(struct cbfs_image *image, const char *name) |
| { |
| struct cbfs_file *entry; |
| for (entry = cbfs_find_first_entry(image); |
| entry && cbfs_is_valid_entry(image, entry); |
| entry = cbfs_find_next_entry(image, entry)) { |
| if (strcasecmp(CBFS_NAME(entry), name) == 0) { |
| DEBUG("cbfs_get_entry: found %s\n", name); |
| return entry; |
| } |
| } |
| return NULL; |
| } |
| |
| int cbfs_export_entry(struct cbfs_image *image, const char *entry_name, |
| const char *filename) |
| { |
| struct cbfs_file *entry = cbfs_get_entry(image, entry_name); |
| struct buffer buffer; |
| if (!entry) { |
| ERROR("File not found: %s\n", entry_name); |
| return -1; |
| } |
| LOG("Found file %.30s at 0x%x, type %.12s, size %d\n", |
| entry_name, cbfs_get_entry_addr(image, entry), |
| get_cbfs_entry_type_name(ntohl(entry->type)), ntohl(entry->len)); |
| |
| if (ntohl(entry->type) != CBFS_COMPONENT_RAW) { |
| WARN("Only 'raw' files are safe to extract.\n"); |
| } |
| |
| buffer.data = CBFS_SUBHEADER(entry); |
| buffer.size = ntohl(entry->len); |
| buffer.name = (char *)"(cbfs_export_entry)"; |
| if (buffer_write_file(&buffer, filename) != 0) { |
| ERROR("Failed to write %s into %s.\n", |
| entry_name, filename); |
| return -1; |
| } |
| INFO("Successfully dumped the file to: %s\n", filename); |
| return 0; |
| } |
| |
| int cbfs_remove_entry(struct cbfs_image *image, const char *name) |
| { |
| struct cbfs_file *entry, *next; |
| size_t len; |
| entry = cbfs_get_entry(image, name); |
| if (!entry) { |
| ERROR("CBFS file %s not found.\n", name); |
| return -1; |
| } |
| next = cbfs_find_next_entry(image, entry); |
| assert(next); |
| DEBUG("cbfs_remove_entry: Removed %s @ 0x%x\n", |
| CBFS_NAME(entry), cbfs_get_entry_addr(image, entry)); |
| entry->type = htonl(CBFS_COMPONENT_DELETED); |
| len = (cbfs_get_entry_addr(image, next) - |
| cbfs_get_entry_addr(image, entry)); |
| entry->offset = htonl(cbfs_calculate_file_header_size("")); |
| entry->len = htonl(len - ntohl(entry->offset)); |
| memset(CBFS_NAME(entry), 0, ntohl(entry->offset) - sizeof(*entry)); |
| memset(CBFS_SUBHEADER(entry), CBFS_CONTENT_DEFAULT_VALUE, |
| ntohl(entry->len)); |
| return 0; |
| } |
| |
| int cbfs_print_header_info(struct cbfs_image *image) |
| { |
| char *name = strdup(image->buffer.name); |
| assert(image && image->header); |
| printf("%s: %zd kB, bootblocksize %d, romsize %d, offset 0x%x\n" |
| "alignment: %d bytes\n\n", |
| basename(name), |
| image->buffer.size / 1024, |
| ntohl(image->header->bootblocksize), |
| ntohl(image->header->romsize), |
| ntohl(image->header->offset), |
| ntohl(image->header->align)); |
| free(name); |
| return 0; |
| } |
| |
| static int cbfs_print_stage_info(struct cbfs_stage *stage, FILE* fp) |
| { |
| fprintf(fp, |
| " %s compression, entry: 0x%" PRIx64 ", load: 0x%" PRIx64 ", " |
| "length: %d/%d\n", |
| lookup_name_by_type(types_cbfs_compression, |
| stage->compression, "(unknown)"), |
| stage->entry, |
| stage->load, |
| stage->len, |
| stage->memlen); |
| return 0; |
| } |
| |
| static int cbfs_print_payload_segment_info(struct cbfs_payload_segment *payload, |
| FILE *fp) |
| { |
| switch(payload->type) { |
| case PAYLOAD_SEGMENT_CODE: |
| case PAYLOAD_SEGMENT_DATA: |
| fprintf(fp, " %s (%s compression, offset: 0x%x, " |
| "load: 0x%" PRIx64 ", length: %d/%d)\n", |
| (payload->type == PAYLOAD_SEGMENT_CODE ? |
| "code " : "data"), |
| lookup_name_by_type(types_cbfs_compression, |
| ntohl(payload->compression), |
| "(unknown)"), |
| ntohl(payload->offset), |
| ntohll(payload->load_addr), |
| ntohl(payload->len), ntohl(payload->mem_len)); |
| break; |
| |
| case PAYLOAD_SEGMENT_ENTRY: |
| fprintf(fp, " entry (0x%" PRIx64 ")\n", |
| ntohll(payload->load_addr)); |
| break; |
| |
| case PAYLOAD_SEGMENT_BSS: |
| fprintf(fp, " BSS (address 0x%016" PRIx64 ", " |
| "length 0x%x)\n", |
| ntohll(payload->load_addr), |
| ntohl(payload->len)); |
| break; |
| |
| case PAYLOAD_SEGMENT_PARAMS: |
| fprintf(fp, " parameters\n"); |
| break; |
| |
| default: |
| fprintf(fp, " 0x%x (%s compression, offset: 0x%x, " |
| "load: 0x%" PRIx64 ", length: %d/%d\n", |
| payload->type, |
| lookup_name_by_type(types_cbfs_compression, |
| payload->compression, |
| "(unknown)"), |
| ntohl(payload->offset), |
| ntohll(payload->load_addr), |
| ntohl(payload->len), |
| ntohl(payload->mem_len)); |
| break; |
| } |
| return 0; |
| } |
| |
| int cbfs_print_entry_info(struct cbfs_image *image, struct cbfs_file *entry, |
| void *arg) |
| { |
| const char *name = CBFS_NAME(entry); |
| struct cbfs_payload_segment *payload; |
| FILE *fp = (FILE *)arg; |
| |
| if (!cbfs_is_valid_entry(image, entry)) { |
| ERROR("cbfs_print_entry_info: Invalid entry at 0x%x\n", |
| cbfs_get_entry_addr(image, entry)); |
| return -1; |
| } |
| if (!fp) |
| fp = stdout; |
| |
| fprintf(fp, "%-30s 0x%-8x %-12s %d\n", |
| *name ? name : "(empty)", |
| cbfs_get_entry_addr(image, entry), |
| get_cbfs_entry_type_name(ntohl(entry->type)), |
| ntohl(entry->len)); |
| |
| if (!verbose) |
| return 0; |
| |
| DEBUG(" cbfs_file=0x%x, offset=0x%x, content_address=0x%x+0x%x\n", |
| cbfs_get_entry_addr(image, entry), ntohl(entry->offset), |
| cbfs_get_entry_addr(image, entry) + ntohl(entry->offset), |
| ntohl(entry->len)); |
| |
| /* note the components of the subheader may be in host order ... */ |
| switch (ntohl(entry->type)) { |
| case CBFS_COMPONENT_STAGE: |
| cbfs_print_stage_info((struct cbfs_stage *) |
| CBFS_SUBHEADER(entry), fp); |
| break; |
| |
| case CBFS_COMPONENT_PAYLOAD: |
| payload = (struct cbfs_payload_segment *) |
| CBFS_SUBHEADER(entry); |
| while (payload) { |
| cbfs_print_payload_segment_info(payload, fp); |
| if (payload->type == PAYLOAD_SEGMENT_ENTRY) |
| break; |
| else |
| payload ++; |
| } |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| int cbfs_print_directory(struct cbfs_image *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; |
| } |
| |
| int cbfs_merge_empty_entry(struct cbfs_image *image, struct cbfs_file *entry, |
| void *arg) |
| { |
| struct cbfs_file *next; |
| uint32_t type, addr, last_addr; |
| |
| type = ntohl(entry->type); |
| if (type == CBFS_COMPONENT_DELETED) { |
| // Ready to be recycled. |
| type = CBFS_COMPONENT_NULL; |
| entry->type = htonl(type); |
| } |
| if (type != CBFS_COMPONENT_NULL) |
| return 0; |
| |
| next = cbfs_find_next_entry(image, entry); |
| |
| while (next && cbfs_is_valid_entry(image, next)) { |
| type = ntohl(next->type); |
| if (type == CBFS_COMPONENT_DELETED) { |
| type = CBFS_COMPONENT_NULL; |
| next->type = htonl(type); |
| } |
| if (type != CBFS_COMPONENT_NULL) |
| return 0; |
| |
| addr = cbfs_get_entry_addr(image, entry); |
| last_addr = cbfs_get_entry_addr( |
| image, cbfs_find_next_entry(image, next)); |
| |
| // Now, we find two deleted/empty entries; try to merge now. |
| DEBUG("join_empty_entry: combine 0x%x+0x%x and 0x%x+0x%x.\n", |
| cbfs_get_entry_addr(image, entry), ntohl(entry->len), |
| cbfs_get_entry_addr(image, next), ntohl(next->len)); |
| cbfs_create_empty_entry(image, entry, |
| (last_addr - addr - |
| cbfs_calculate_file_header_size("")), |
| ""); |
| DEBUG("new empty entry: length=0x%x\n", ntohl(entry->len)); |
| next = cbfs_find_next_entry(image, entry); |
| } |
| return 0; |
| } |
| |
| int cbfs_walk(struct cbfs_image *image, cbfs_entry_callback callback, |
| void *arg) |
| { |
| int count = 0; |
| struct cbfs_file *entry; |
| for (entry = cbfs_find_first_entry(image); |
| entry && cbfs_is_valid_entry(image, entry); |
| entry = cbfs_find_next_entry(image, entry)) { |
| count ++; |
| if (callback(image, entry, arg) != 0) |
| break; |
| } |
| return count; |
| } |
| |
| struct cbfs_header *cbfs_find_header(char *data, size_t size) |
| { |
| size_t offset; |
| int found = 0; |
| uint32_t x86sig; |
| struct cbfs_header *header, *result = NULL; |
| |
| // Try x86 style (check signature in bottom) header first. |
| x86sig = *(uint32_t *)(data + size - sizeof(uint32_t)); |
| offset = (x86sig + (uint32_t)size); |
| DEBUG("x86sig: 0x%x, offset: 0x%zx\n", x86sig, offset); |
| if (offset >= size - sizeof(*header) || |
| ntohl(((struct cbfs_header *)(data + offset))->magic) != |
| CBFS_HEADER_MAGIC) |
| offset = 0; |
| |
| for (; offset + sizeof(*header) < size; offset++) { |
| header = (struct cbfs_header *)(data + offset); |
| if (ntohl(header->magic) !=(CBFS_HEADER_MAGIC)) |
| continue; |
| if (ntohl(header->version) != CBFS_HEADER_VERSION1 && |
| ntohl(header->version) != CBFS_HEADER_VERSION2) { |
| // Probably not a real CBFS header? |
| continue; |
| } |
| found++; |
| result = header; |
| } |
| if (found > 1) { |
| ERROR("multiple (%d) CBFS headers found!\n", |
| found); |
| result = NULL; |
| } |
| return result; |
| } |
| |
| |
| struct cbfs_file *cbfs_find_first_entry(struct cbfs_image *image) |
| { |
| assert(image && image->header); |
| return (struct cbfs_file *)(image->buffer.data + |
| ntohl(image->header->offset)); |
| } |
| |
| 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 = ntohl(image->header->align); |
| assert(entry && cbfs_is_valid_entry(image, entry)); |
| addr += ntohl(entry->offset) + ntohl(entry->len); |
| addr = align_up(addr, align); |
| return (struct cbfs_file *)(image->buffer.data + addr); |
| } |
| |
| uint32_t cbfs_get_entry_addr(struct cbfs_image *image, struct cbfs_file *entry) |
| { |
| assert(image && image->buffer.data && entry); |
| return (int32_t)((char *)entry - image->buffer.data); |
| } |
| |
| int cbfs_is_valid_entry(struct cbfs_image *image, struct cbfs_file *entry) |
| { |
| return (entry && |
| (char *)entry >= image->buffer.data && |
| (char *)entry + sizeof(entry->magic) < |
| image->buffer.data + image->buffer.size && |
| memcmp(entry->magic, CBFS_FILE_MAGIC, |
| sizeof(entry->magic)) == 0); |
| } |
| |
| int cbfs_create_empty_entry(struct cbfs_image *image, struct cbfs_file *entry, |
| size_t len, const char *name) |
| { |
| memset(entry, CBFS_CONTENT_DEFAULT_VALUE, sizeof(*entry)); |
| memcpy(entry->magic, CBFS_FILE_MAGIC, sizeof(entry->magic)); |
| entry->type = htonl(CBFS_COMPONENT_NULL); |
| entry->len = htonl(len); |
| entry->checksum = 0; // TODO Build a checksum algorithm. |
| entry->offset = htonl(cbfs_calculate_file_header_size(name)); |
| memset(CBFS_NAME(entry), 0, ntohl(entry->offset) - sizeof(*entry)); |
| strcpy(CBFS_NAME(entry), name); |
| memset(CBFS_SUBHEADER(entry), CBFS_CONTENT_DEFAULT_VALUE, len); |
| return 0; |
| } |
| |
| /* Finds a place to hold whole data in same memory page. */ |
| static int is_in_same_page(uint32_t start, uint32_t size, uint32_t page) |
| { |
| if (!page) |
| return 1; |
| return (start / page) == (start + size - 1) / page; |
| } |
| |
| /* Tests if data can fit in a range by given offset: |
| * start ->| header_len | offset (+ size) |<- end |
| */ |
| static int is_in_range(uint32_t start, uint32_t end, uint32_t header_len, |
| uint32_t offset, uint32_t size) |
| { |
| return (offset >= start + header_len && offset + size <= end); |
| } |
| |
| int32_t cbfs_locate_entry(struct cbfs_image *image, const char *name, |
| uint32_t size, uint32_t page_size, uint32_t align) |
| { |
| struct cbfs_file *entry; |
| size_t need_len; |
| uint32_t addr, addr_next, addr2, addr3, offset, header_len; |
| |
| /* Default values: allow fitting anywhere in ROM. */ |
| if (!page_size) |
| page_size = ntohl(image->header->romsize); |
| if (!align) |
| align = 1; |
| |
| if (size > page_size) |
| ERROR("Input file size (%d) greater than page size (%d).\n", |
| size, page_size); |
| |
| if (page_size % ntohl(image->header->align)) |
| WARN("%s: Page size (%#x) not aligned with CBFS image (%#x).\n", |
| __func__, page_size, ntohl(image->header->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" |
| * (type) param in future. For right now, we assume cbfs_stage is the |
| * largest structure and add it into header size. */ |
| assert(sizeof(struct cbfs_stage) >= sizeof(struct cbfs_payload)); |
| header_len = (cbfs_calculate_file_header_size(name) + |
| sizeof(struct cbfs_stage)); |
| need_len = header_len + size; |
| |
| // Merge empty entries to build get max available space. |
| cbfs_walk(image, cbfs_merge_empty_entry, NULL); |
| |
| /* Three cases of content location on memory page: |
| * case 1. |
| * | PAGE 1 | PAGE 2 | |
| * | <header><content>| Fit. Return start of content. |
| * |
| * case 2. |
| * | PAGE 1 | PAGE 2 | |
| * | <header><content> | Fits when we shift content to align |
| * shift-> | <header>|<content> | at starting of PAGE 2. |
| * |
| * case 3. (large content filling whole page) |
| * | PAGE 1 | PAGE 2 | PAGE 3 | |
| * | <header>< content > | Can't fit. If we shift content to |
| * |trial-> <header>< content > | PAGE 2, header can't fit in free |
| * | shift-> <header><content> space, so we must use PAGE 3. |
| * |
| * The returned address can be then used as "base-address" (-b) in add-* |
| * commands (will be re-calculated and positioned by cbfs_add_entry_at). |
| * For stage targets, the address is also used to re-link stage before |
| * being added into CBFS. |
| */ |
| for (entry = cbfs_find_first_entry(image); |
| entry && cbfs_is_valid_entry(image, entry); |
| entry = cbfs_find_next_entry(image, entry)) { |
| |
| uint32_t type = ntohl(entry->type); |
| if (type != CBFS_COMPONENT_NULL) |
| continue; |
| |
| addr = cbfs_get_entry_addr(image, entry); |
| addr_next = cbfs_get_entry_addr(image, cbfs_find_next_entry( |
| image, entry)); |
| if (addr_next - addr < need_len) |
| continue; |
| |
| offset = align_up(addr + header_len, align); |
| if (is_in_same_page(offset, size, page_size) && |
| is_in_range(addr, addr_next, header_len, offset, size)) { |
| DEBUG("cbfs_locate_entry: FIT (PAGE1)."); |
| return offset; |
| } |
| |
| addr2 = align_up(addr, page_size); |
| offset = align_up(addr2, align); |
| if (is_in_range(addr, addr_next, header_len, offset, size)) { |
| DEBUG("cbfs_locate_entry: OVERLAP (PAGE2)."); |
| return offset; |
| } |
| |
| /* Assume page_size >= header_len so adding one page will |
| * definitely provide the space for header. */ |
| assert(page_size >= header_len); |
| addr3 = addr2 + page_size; |
| offset = align_up(addr3, align); |
| if (is_in_range(addr, addr_next, header_len, offset, size)) { |
| DEBUG("cbfs_locate_entry: OVERLAP+ (PAGE3)."); |
| return offset; |
| } |
| } |
| return -1; |
| } |