diff options
Diffstat (limited to 'futility/dump_kernel_config_lib.c')
| -rw-r--r-- | futility/dump_kernel_config_lib.c | 195 |
1 files changed, 99 insertions, 96 deletions
diff --git a/futility/dump_kernel_config_lib.c b/futility/dump_kernel_config_lib.c index 63c2899f..d3e88a96 100644 --- a/futility/dump_kernel_config_lib.c +++ b/futility/dump_kernel_config_lib.c @@ -14,106 +14,109 @@ #include "vboot_api.h" #include "vboot_host.h" -static uint8_t* GetKernelConfig(uint8_t* blob, size_t blob_size, - uint64_t kernel_body_load_address) { - - VbKeyBlockHeader* key_block; - VbKernelPreambleHeader* preamble; - uint32_t now = 0; - uint32_t offset = 0; - - /* Skip the key block */ - key_block = (VbKeyBlockHeader*)blob; - now += key_block->key_block_size; - if (now + blob > blob + blob_size) { - VbExError("key_block_size advances past the end of the blob\n"); - return NULL; - } - - /* Open up the preamble */ - preamble = (VbKernelPreambleHeader*)(blob + now); - now += preamble->preamble_size; - if (now + blob > blob + blob_size) { - VbExError("preamble_size advances past the end of the blob\n"); - return NULL; - } - - /* Read body_load_address from preamble if no kernel_body_load_address */ - if (kernel_body_load_address == USE_PREAMBLE_LOAD_ADDR) - kernel_body_load_address = preamble->body_load_address; - - /* The x86 kernels have a pointer to the kernel commandline in the zeropage - * table, but that's irrelevant for ARM. Both types keep the config blob in - * the same place, so just go find it. */ - offset = preamble->bootloader_address - - (kernel_body_load_address + CROS_PARAMS_SIZE + - CROS_CONFIG_SIZE) + now; - if (offset > blob_size) { - VbExError("params are outside of the memory blob: %x\n", offset); - return NULL; - } - return blob + offset; -} +static uint8_t *GetKernelConfig(uint8_t * blob, size_t blob_size, + uint64_t kernel_body_load_address) +{ -static void* MMapFile(const char* filename, size_t *size) { - FILE* f; - uint8_t* buf; - long file_size = 0; - - f = fopen(filename, "rb"); - if (!f) { - VBDEBUG(("Unable to open file %s\n", filename)); - return NULL; - } - - fseek(f, 0, SEEK_END); - file_size = ftell(f); - rewind(f); - - if (file_size <= 0) { - fclose(f); - return NULL; - } - *size = (size_t) file_size; - - /* Uses a host primitive as this is not meant for firmware use. */ - buf = mmap(NULL, *size, PROT_READ, MAP_PRIVATE, fileno(f), 0); - if (buf == MAP_FAILED) { - VbExError("Failed to mmap the file %s\n", filename); - fclose(f); - return NULL; - } - - fclose(f); - return buf; + VbKeyBlockHeader *key_block; + VbKernelPreambleHeader *preamble; + uint32_t now = 0; + uint32_t offset = 0; + + /* Skip the key block */ + key_block = (VbKeyBlockHeader *) blob; + now += key_block->key_block_size; + if (now + blob > blob + blob_size) { + VbExError("key_block_size advances past the end of the blob\n"); + return NULL; + } + + /* Open up the preamble */ + preamble = (VbKernelPreambleHeader *) (blob + now); + now += preamble->preamble_size; + if (now + blob > blob + blob_size) { + VbExError("preamble_size advances past the end of the blob\n"); + return NULL; + } + + /* Read body_load_address from preamble if no + * kernel_body_load_address */ + if (kernel_body_load_address == USE_PREAMBLE_LOAD_ADDR) + kernel_body_load_address = preamble->body_load_address; + + /* The x86 kernels have a pointer to the kernel commandline in the + * zeropage table, but that's irrelevant for ARM. Both types keep the + * config blob in the same place, so just go find it. */ + offset = preamble->bootloader_address - + (kernel_body_load_address + CROS_PARAMS_SIZE + + CROS_CONFIG_SIZE) + now; + if (offset > blob_size) { + VbExError("params are outside of the memory blob: %x\n", + offset); + return NULL; + } + return blob + offset; } +static void *MMapFile(const char *filename, size_t * size) +{ + FILE *f; + uint8_t *buf; + long file_size = 0; + + f = fopen(filename, "rb"); + if (!f) { + VBDEBUG(("Unable to open file %s\n", filename)); + return NULL; + } + + fseek(f, 0, SEEK_END); + file_size = ftell(f); + rewind(f); + + if (file_size <= 0) { + fclose(f); + return NULL; + } + *size = (size_t) file_size; + + /* Uses a host primitive as this is not meant for firmware use. */ + buf = mmap(NULL, *size, PROT_READ, MAP_PRIVATE, fileno(f), 0); + if (buf == MAP_FAILED) { + VbExError("Failed to mmap the file %s\n", filename); + fclose(f); + return NULL; + } + + fclose(f); + return buf; +} char *FindKernelConfig(const char *infile, uint64_t kernel_body_load_address) { - uint8_t* blob; - size_t blob_size; - uint8_t *config = NULL; - char *newstr = NULL; - - blob = MMapFile(infile, &blob_size); - if (!blob) { - VbExError("Error reading input file\n"); - return 0; - } - - config = GetKernelConfig(blob, blob_size, kernel_body_load_address); - if (!config) { - VbExError("Error parsing input file\n"); - munmap(blob, blob_size); - return 0; - } - - newstr = strndup((char *)config, CROS_CONFIG_SIZE); - if (!newstr) - VbExError("Can't allocate new string\n"); - - munmap(blob, blob_size); - - return newstr; + uint8_t *blob; + size_t blob_size; + uint8_t *config = NULL; + char *newstr = NULL; + + blob = MMapFile(infile, &blob_size); + if (!blob) { + VbExError("Error reading input file\n"); + return 0; + } + + config = GetKernelConfig(blob, blob_size, kernel_body_load_address); + if (!config) { + VbExError("Error parsing input file\n"); + munmap(blob, blob_size); + return 0; + } + + newstr = strndup((char *)config, CROS_CONFIG_SIZE); + if (!newstr) + VbExError("Can't allocate new string\n"); + + munmap(blob, blob_size); + + return newstr; } |