diff options
Diffstat (limited to 'mkbootimg')
| -rw-r--r-- | mkbootimg/Android.mk | 29 | ||||
| -rw-r--r-- | mkbootimg/bootimg.h | 6 | ||||
| -rw-r--r-- | mkbootimg/mkbootimg.c | 32 | ||||
| -rw-r--r-- | mkbootimg/unpackbootimg.c | 211 |
4 files changed, 274 insertions, 4 deletions
diff --git a/mkbootimg/Android.mk b/mkbootimg/Android.mk index 0c9b0c6..c020323 100644 --- a/mkbootimg/Android.mk +++ b/mkbootimg/Android.mk @@ -10,4 +10,33 @@ LOCAL_MODULE := mkbootimg include $(BUILD_HOST_EXECUTABLE) +include $(CLEAR_VARS) +LOCAL_SRC_FILES := unpackbootimg.c +LOCAL_MODULE := unpackbootimg +include $(BUILD_HOST_EXECUTABLE) + +include $(CLEAR_VARS) +LOCAL_SRC_FILES := mkbootimg.c +LOCAL_STATIC_LIBRARIES := libmincrypt libcutils libc +LOCAL_MODULE := utility_mkbootimg +LOCAL_MODULE_TAGS := eng +LOCAL_MODULE_STEM := mkbootimg +LOCAL_MODULE_CLASS := EXECUTABLES +LOCAL_UNSTRIPPED_PATH := $(PRODUCT_OUT)/symbols/utilities +LOCAL_MODULE_PATH := $(PRODUCT_OUT)/utilities +LOCAL_FORCE_STATIC_EXECUTABLE := true +include $(BUILD_EXECUTABLE) + +include $(CLEAR_VARS) +LOCAL_SRC_FILES := unpackbootimg.c +LOCAL_STATIC_LIBRARIES := libcutils libc +LOCAL_MODULE := utility_unpackbootimg +LOCAL_MODULE_TAGS := eng +LOCAL_MODULE_STEM := unpackbootimg +LOCAL_MODULE_CLASS := EXECUTABLES +LOCAL_UNSTRIPPED_PATH := $(PRODUCT_OUT)/symbols/utilities +LOCAL_MODULE_PATH := $(PRODUCT_OUT)/utilities +LOCAL_FORCE_STATIC_EXECUTABLE := true +include $(BUILD_EXECUTABLE) + $(call dist-for-goals,dist_files,$(LOCAL_BUILT_MODULE)) diff --git a/mkbootimg/bootimg.h b/mkbootimg/bootimg.h index 5ab6195..e66e269 100644 --- a/mkbootimg/bootimg.h +++ b/mkbootimg/bootimg.h @@ -43,7 +43,8 @@ struct boot_img_hdr uint32_t tags_addr; /* physical addr for kernel tags */ uint32_t page_size; /* flash page size we assume */ - uint32_t unused[2]; /* future expansion: should be 0 */ + uint32_t dt_size; /* device tree in bytes */ + uint32_t unused; /* future expansion: should be 0 */ uint8_t name[BOOT_NAME_SIZE]; /* asciiz product name */ @@ -66,10 +67,13 @@ struct boot_img_hdr ** +-----------------+ ** | second stage | o pages ** +-----------------+ +** | device tree | p pages +** +-----------------+ ** ** n = (kernel_size + page_size - 1) / page_size ** m = (ramdisk_size + page_size - 1) / page_size ** o = (second_size + page_size - 1) / page_size +** p = (dt_size + page_size - 1) / page_size ** ** 0. all entities are page_size aligned in flash ** 1. kernel and ramdisk are required (size != 0) diff --git a/mkbootimg/mkbootimg.c b/mkbootimg/mkbootimg.c index b6a2801..fa8697d 100644 --- a/mkbootimg/mkbootimg.c +++ b/mkbootimg/mkbootimg.c @@ -66,6 +66,9 @@ int usage(void) " [ --board <boardname> ]\n" " [ --base <address> ]\n" " [ --pagesize <pagesize> ]\n" + " [ --dt <filename> ]\n" + " [ --ramdisk_offset <address> ]\n" + " [ --tags_offset <address> ]\n" " [ --id ]\n" " -o|--output <filename>\n" ); @@ -74,11 +77,12 @@ int usage(void) -static unsigned char padding[16384] = { 0, }; +static unsigned char padding[131072] = { 0, }; static void print_id(const uint8_t *id, size_t id_len) { printf("0x"); - for (unsigned i = 0; i < id_len; i++) { + unsigned i = 0; + for (i = 0; i < id_len; i++) { printf("%02x", id[i]); } printf("\n"); @@ -115,6 +119,8 @@ int main(int argc, char **argv) char *cmdline = ""; char *bootimg = NULL; char *board = ""; + char *dt_fn = 0; + void *dt_data = 0; uint32_t pagesize = 2048; int fd; SHA_CTX ctx; @@ -167,10 +173,14 @@ int main(int argc, char **argv) } else if(!strcmp(arg,"--pagesize")) { pagesize = strtoul(val, 0, 10); if ((pagesize != 2048) && (pagesize != 4096) - && (pagesize != 8192) && (pagesize != 16384)) { + && (pagesize != 8192) && (pagesize != 16384) + && (pagesize != 32768) && (pagesize != 65536) + && (pagesize != 131072)) { fprintf(stderr,"error: unsupported page size %d\n", pagesize); return -1; } + } else if(!strcmp(arg, "--dt")) { + dt_fn = val; } else { return usage(); } @@ -243,6 +253,14 @@ int main(int argc, char **argv) } } + if(dt_fn) { + dt_data = load_file(dt_fn, &hdr.dt_size); + if (dt_data == 0) { + fprintf(stderr,"error: could not load device tree image '%s'\n", dt_fn); + return 1; + } + } + /* put a hash of the contents in the header so boot images can be * differentiated based on their first 2k. */ @@ -253,6 +271,10 @@ int main(int argc, char **argv) SHA_update(&ctx, &hdr.ramdisk_size, sizeof(hdr.ramdisk_size)); SHA_update(&ctx, second_data, hdr.second_size); SHA_update(&ctx, &hdr.second_size, sizeof(hdr.second_size)); + if(dt_data) { + SHA_update(&ctx, dt_data, hdr.dt_size); + SHA_update(&ctx, &hdr.dt_size, sizeof(hdr.dt_size)); + } sha = SHA_final(&ctx); memcpy(hdr.id, sha, SHA_DIGEST_SIZE > sizeof(hdr.id) ? sizeof(hdr.id) : SHA_DIGEST_SIZE); @@ -281,6 +303,10 @@ int main(int argc, char **argv) print_id((uint8_t *) hdr.id, sizeof(hdr.id)); } + if(dt_data) { + if(write(fd, dt_data, hdr.dt_size) != (ssize_t) hdr.dt_size) goto fail; + if(write_padding(fd, pagesize, hdr.dt_size)) goto fail; + } return 0; fail: diff --git a/mkbootimg/unpackbootimg.c b/mkbootimg/unpackbootimg.c new file mode 100644 index 0000000..3d2fda7 --- /dev/null +++ b/mkbootimg/unpackbootimg.c @@ -0,0 +1,211 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <limits.h> +#include <libgen.h> + +#include "mincrypt/sha.h" +#include "bootimg.h" + +typedef unsigned char byte; + +int read_padding(FILE* f, unsigned itemsize, int pagesize) +{ + byte* buf = (byte*)malloc(sizeof(byte) * pagesize); + unsigned pagemask = pagesize - 1; + unsigned count; + + if((itemsize & pagemask) == 0) { + free(buf); + return 0; + } + + count = pagesize - (itemsize & pagemask); + + fread(buf, count, 1, f); + free(buf); + return count; +} + +void write_string_to_file(char* file, char* string) +{ + FILE* f = fopen(file, "w"); + fwrite(string, strlen(string), 1, f); + fwrite("\n", 1, 1, f); + fclose(f); +} + +int usage() { + printf("usage: unpackbootimg\n"); + printf("\t-i|--input boot.img\n"); + printf("\t[ -o|--output output_directory]\n"); + printf("\t[ -p|--pagesize <size-in-hexadecimal> ]\n"); + return 0; +} + +int main(int argc, char** argv) +{ + char tmp[PATH_MAX]; + char* directory = "./"; + char* filename = NULL; + int pagesize = 0; + + argc--; + argv++; + while(argc > 0){ + char *arg = argv[0]; + char *val = argv[1]; + argc -= 2; + argv += 2; + if(!strcmp(arg, "--input") || !strcmp(arg, "-i")) { + filename = val; + } else if(!strcmp(arg, "--output") || !strcmp(arg, "-o")) { + directory = val; + } else if(!strcmp(arg, "--pagesize") || !strcmp(arg, "-p")) { + pagesize = strtoul(val, 0, 16); + } else { + return usage(); + } + } + + if (filename == NULL) { + return usage(); + } + + int total_read = 0; + FILE* f = fopen(filename, "rb"); + boot_img_hdr header; + + //printf("Reading header...\n"); + int i; + for (i = 0; i <= 512; i++) { + fseek(f, i, SEEK_SET); + fread(tmp, BOOT_MAGIC_SIZE, 1, f); + if (memcmp(tmp, BOOT_MAGIC, BOOT_MAGIC_SIZE) == 0) + break; + } + total_read = i; + if (i > 512) { + printf("Android boot magic not found.\n"); + return 1; + } + fseek(f, i, SEEK_SET); + printf("Android magic found at: %d\n", i); + + fread(&header, sizeof(header), 1, f); + printf("BOARD_KERNEL_CMDLINE %s\n", header.cmdline); + printf("BOARD_KERNEL_BASE %08x\n", header.kernel_addr - 0x00008000); + printf("BOARD_RAMDISK_OFFSET %08x\n", header.ramdisk_addr - header.kernel_addr + 0x00008000); + printf("BOARD_SECOND_OFFSET %08x\n", header.second_addr - header.kernel_addr + 0x00008000); + printf("BOARD_TAGS_OFFSET %08x\n",header.tags_addr - header.kernel_addr + 0x00008000); + printf("BOARD_PAGE_SIZE %d\n", header.page_size); + printf("BOARD_SECOND_SIZE %d\n", header.second_size); + printf("BOARD_DT_SIZE %d\n", header.dt_size); + + if (pagesize == 0) { + pagesize = header.page_size; + } + + //printf("cmdline...\n"); + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-cmdline"); + write_string_to_file(tmp, header.cmdline); + + //printf("base...\n"); + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-base"); + char basetmp[200]; + sprintf(basetmp, "%08x", header.kernel_addr - 0x00008000); + write_string_to_file(tmp, basetmp); + + //printf("ramdisk_offset...\n"); + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-ramdisk_offset"); + char ramdisktmp[200]; + sprintf(ramdisktmp, "%08x", header.ramdisk_addr - header.kernel_addr + 0x00008000); + write_string_to_file(tmp, ramdisktmp); + + //printf("second_offset...\n"); + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-second_offset"); + char secondtmp[200]; + sprintf(secondtmp, "%08x", header.second_addr - header.kernel_addr + 0x00008000); + write_string_to_file(tmp, secondtmp); + + //printf("tags_offset...\n"); + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-tags_offset"); + char tagstmp[200]; + sprintf(tagstmp, "%08x", header.tags_addr - header.kernel_addr + 0x00008000); + write_string_to_file(tmp, tagstmp); + + //printf("pagesize...\n"); + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-pagesize"); + char pagesizetmp[200]; + sprintf(pagesizetmp, "%d", header.page_size); + write_string_to_file(tmp, pagesizetmp); + + total_read += sizeof(header); + //printf("total read: %d\n", total_read); + total_read += read_padding(f, sizeof(header), pagesize); + + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-zImage"); + FILE *k = fopen(tmp, "wb"); + byte* kernel = (byte*)malloc(header.kernel_size); + //printf("Reading kernel...\n"); + fread(kernel, header.kernel_size, 1, f); + total_read += header.kernel_size; + fwrite(kernel, header.kernel_size, 1, k); + fclose(k); + + //printf("total read: %d\n", header.kernel_size); + total_read += read_padding(f, header.kernel_size, pagesize); + + + byte* ramdisk = (byte*)malloc(header.ramdisk_size); + //printf("Reading ramdisk...\n"); + fread(ramdisk, header.ramdisk_size, 1, f); + total_read += header.ramdisk_size; + sprintf(tmp, "%s/%s", directory, basename(filename)); + if(ramdisk[0] == 0x02 && ramdisk[1]== 0x21) + strcat(tmp, "-ramdisk.lz4"); + else + strcat(tmp, "-ramdisk.gz"); + FILE *r = fopen(tmp, "wb"); + fwrite(ramdisk, header.ramdisk_size, 1, r); + fclose(r); + + total_read += read_padding(f, header.ramdisk_size, pagesize); + + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-second"); + FILE *s = fopen(tmp, "wb"); + byte* second = (byte*)malloc(header.second_size); + //printf("Reading second...\n"); + fread(second, header.second_size, 1, f); + total_read += header.second_size; + fwrite(second, header.second_size, 1, r); + fclose(s); + + total_read += read_padding(f, header.second_size, pagesize); + + sprintf(tmp, "%s/%s", directory, basename(filename)); + strcat(tmp, "-dt"); + FILE *d = fopen(tmp, "wb"); + byte* dt = (byte*)malloc(header.dt_size); + //printf("Reading dt...\n"); + fread(dt, header.dt_size, 1, f); + total_read += header.dt_size; + fwrite(dt, header.dt_size, 1, r); + fclose(d); + + fclose(f); + + //printf("Total Read: %d\n", total_read); + return 0; +} |