diff options
Diffstat (limited to 'util/listblob.c')
-rw-r--r-- | util/listblob.c | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/util/listblob.c b/util/listblob.c index ccae1d0..e6266a3 100644 --- a/util/listblob.c +++ b/util/listblob.c @@ -5,18 +5,17 @@ ** ** Examine a binary blob of ELF files. */ - #define _DEFAULT_SOURCE -#include <ctype.h> -#include <elf.h> -#include <fcntl.h> -#include <stdbool.h> -#include <stdint.h> #include <stdio.h> +#include <stdint.h> #include <stdlib.h> +#include <stdbool.h> #include <string.h> -#include <sys/stat.h> #include <unistd.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <elf.h> +#include <ctype.h> /* ** Blob file organization @@ -40,11 +39,11 @@ ** size Size of this ELF file, in bytes ** flags Flags related to this file */ + // blob header: 8 bytes typedef struct header_s { char magic[4]; uint32_t num; - } header_t; // The program table entry is 32 bytes long. To accomplish this, the @@ -73,8 +72,8 @@ typedef struct prog_s { typedef struct node_s { prog_t *data; struct node_s *next; - } node_t; + node_t *progs, *last_prog; // list pointers uint32_t n_progs; // number of files being copied uint32_t offset; // current file area offset @@ -129,11 +128,12 @@ void process(uint32_t num, prog_t *prog) char *slash = strrchr(prog->name, '/'); if (slash == NULL) { slash = prog->name; - } else { ++slash; } + slash[0] = toupper(slash[0]); + if (defs) { // just printing #define statements printf("#define %-15s %2d\n", prog->name, num); @@ -144,7 +144,6 @@ void process(uint32_t num, prog_t *prog) // first one, so print the file header puts(header); putchar('\t'); - } else { // second or later entry; limit to 8 per line fputs(((num & 0x7) == 0) ? ",\n\t" : ", ", stdout); @@ -160,56 +159,65 @@ void process(uint32_t num, prog_t *prog) prog->size, prog->flags); } } + void usage(char *name) { fprintf(stderr, "usage: %s [-d | -e] blob_name\n", name); } + int main(int argc, char *argv[]) { if (argc < 2 || argc > 3) { usage(argv[0]); exit(1); } + int nameix = 1; // could use getopt() for this, but this is easy enough if (argc == 3) { if (strcmp(argv[1], "-d") == 0) { defs = true; - } else if (strcmp(argv[1], "-e") == 0) { enums = true; - } else { usage(argv[0]); exit(1); } nameix = 2; } + char *name = argv[nameix]; + int fd = open(name, O_RDONLY); if (fd < 0) { perror(name); exit(1); } + header_t hdr; + int n = read(fd, &hdr, sizeof(header_t)); if (n != sizeof(header_t)) { fprintf(stderr, "%s: header read returned only %d bytes\n", name, n); close(fd); exit(1); } + if (strcmp(hdr.magic, "BLB") != 0) { fprintf(stderr, "%s: bad magic number\n", name); close(fd); exit(1); } + if (hdr.num < 1) { fprintf(stderr, "%s: no programs in blob?\n", name); close(fd); exit(1); } + prog_t progs[hdr.num]; + n = read(fd, progs, hdr.num * sizeof(prog_t)); if (n != (int)(hdr.num * sizeof(prog_t))) { fprintf(stderr, "%s: prog table only %d bytes, expected %lu\n", name, n, @@ -217,13 +225,16 @@ int main(int argc, char *argv[]) close(fd); exit(1); } + for (uint32_t i = 0; i < hdr.num; ++i) { process(i, &progs[i]); } + if (enums) { // print the file trailer puts(trailer); } + close(fd); return 0; } |