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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "device.h"
#include "image.h"
#define IMAGE_CHECK(image) do { if ( ! image || image->fd < 0 ) return; } while (0)
#define IMAGE_STORE_CUR(image) do { if ( image->shared_fd ) image->cur = lseek(image->fd, 0, SEEK_CUR) - image->offset; } while (0)
#define IMAGE_RESTORE_CUR(image) do { if ( image->shared_fd ) lseek(image->fd, image->offset + image->cur, SEEK_SET); } while (0)
static void image_append(struct image * image, const char * type, const char * device, const char * hwrevs, const char * version, const char * layout) {
IMAGE_CHECK(image);
image->hash = image_hash_from_data(image);
image->device = device_from_string(device);
if ( type )
image->type = image_type_from_string(type);
else
image->type = image_type_from_data(image);
if ( hwrevs )
image->hwrevs = strdup(hwrevs);
if ( version )
image->version = strdup(version);
if ( layout )
image->layout = strdup(layout);
}
static struct image * image_alloc(void) {
struct image * image = calloc(1, sizeof(struct image));
if ( ! image ) {
perror("Cannot allocate memory");
return NULL;
}
return image;
}
struct image * image_alloc_from_file(const char * file, const char * type, const char * device, const char * hwrevs, const char * version, const char * layout) {
struct image * image = image_alloc();
if ( ! image )
return NULL;
image->shared_fd = 0;
image->fd = open(file, O_RDONLY);
if ( image->fd < 0 ) {
perror("Cannot open file");
free(image);
return NULL;
}
image->size = lseek(image->fd, 0, SEEK_END);
image->offset = 0;
image->cur = 0;
image_append(image, type, device, hwrevs, version, layout);
return image;
}
struct image * image_alloc_from_shared_fd(int fd, size_t size, size_t offset, uint16_t hash, const char * type, const char * device, const char * hwrevs, const char * version, const char * layout) {
struct image * image = image_alloc();
if ( ! image )
return NULL;
image->shared_fd = 1;
image->fd = fd;
image->size = size;
image->offset = offset;
image->cur = 0;
image_append(image, type, device, hwrevs, version, layout);
if ( image->hash != hash ) {
fprintf(stderr, "Image hash mishmash");
image_free(image);
return NULL;
}
return image;
}
void image_free(struct image * image) {
IMAGE_CHECK(image);
if ( ! image->shared_fd ) {
close(image->fd);
image->fd = -1;
}
free(image->hwrevs);
free(image->version);
free(image->layout);
free(image);
}
void image_seek(struct image * image, off_t whence) {
IMAGE_CHECK(image);
lseek(image->fd, image->offset + whence, SEEK_SET);
IMAGE_STORE_CUR(image);
}
size_t image_read(struct image * image, void * buf, size_t count) {
IMAGE_CHECK(image);
IMAGE_RESTORE_CUR(image);
if ( image->cur + count > image->size ) {
if ( image->size < image->cur )
return 0;
count = image->size - image->cur;
}
count = read(image->fd, buf, count);
IMAGE_STORE_CUR(image);
return count;
}
/*size_t image_write(struct image * image, void * buf, size_t count) {
IMAGE_CHECK(image);
IMAGE_RESTORE_CUR(image);
count = write(image->fd, buf, count);
IMAGE_STORE_CUR(image);
return count;
}*/
void image_list_add(struct image_list ** list, struct image * image) {
IMAGE_CHECK(image);
struct image_list * first = calloc(1, sizeof(struct image_list));
if ( ! first )
return;
first->image = image;
first->next = *list;
if ( *list ) {
first->prev = (*list)->prev;
if ( (*list)->prev )
(*list)->prev->next = first;
(*list)->prev = first;
} else {
*list = first;
}
}
void image_list_del(struct image_list * list) {
if ( ! list )
return;
if ( list->prev )
list->prev->next = list->next;
if ( list->next )
list->next->prev = list->prev;
image_free(list->image);
free(list);
}
uint16_t image_hash_from_data(struct image * image) {
/* TODO */
}
static const char * image_types[] = {
[IMAGE_XLOADER] = "xloader",
[IMAGE_2ND] = "2nd",
[IMAGE_SECONDARY] = "secondary",
[IMAGE_KERNEL] = "kernel",
[IMAGE_INITFS] = "initfs",
[IMAGE_ROOTFS] = "rootfs",
[IMAGE_OMAP_NAND] = "omap-nand",
[IMAGE_MMC] = "mmc",
[IMAGE_CMT_2ND] = "cmt-2nd",
[IMAGE_CMT_ALGO] = "cmt-algo",
[IMAGE_CMT_MCUSW] = "cmt-mcusw",
};
enum image_type image_type_from_data(struct image * image) {
IMAGE_CHECK(image);
unsigned char buf[512];
image_seek(image, 0);
image_read(image, buf, sizeof(buf));
// 2nd : +0x34 = 2NDAPE
// secondary: +0x04 = NOLOScnd
// x-loader : +0x14 = X-LOADER
// xloader8 : +0x0c = NOLOXldr
// kernel : +0x00 = 0000 a0e1 0000 a0e1
// initfs : <2M...be sure with 3M 0x300000
if ( memcmp(buf+0x34, "2NDAPE", 6) == 0 )
return IMAGE_2ND;
else if ( memcmp(buf+0x04, "NOLOScnd", 8) == 0 )
return IMAGE_SECONDARY;
else if ( memcmp(buf+0x14, "X-LOADER", 8) == 0 )
return IMAGE_XLOADER;
else if ( memcmp(buf+0x0c, "NOLOXldr", 8) == 0 )
return IMAGE_XLOADER;
else if ( memcmp(buf+4, "NOLOXldr", 8) == 0 )
// TODO: this is xloader800, not valid on 770?
return IMAGE_2ND;
else if ( memcmp(buf, "\x00\x00\xa0\xe1\x00\x00\xa0\xe1", 8) == 0 )
return IMAGE_KERNEL;
else if ( memcmp(buf, "\x21\x01\x01", 3) == 0 )
return IMAGE_KERNEL;
else if ( memcmp(buf, "\x85\x19", 2) == 0 ) {
// JFFS2 MAGIC
if ( image->size < 0x300000 )
return IMAGE_INITFS;
else
return IMAGE_ROOTFS;
}
/* TODO: Add support for UBIFS rootfs and other types */
return IMAGE_UNKNOWN;
}
enum image_type image_type_from_string(const char * type) {
size_t i;
if ( ! type )
return IMAGE_UNKNOWN;
for ( i = 0; i < sizeof(image_types)/sizeof(image_types[0]); ++i )
if ( image_types[i] && strcmp(image_types[i], type) == 0 )
return i;
return IMAGE_UNKNOWN;
}
const char * image_type_to_string(enum image_type type) {
if ( type > sizeof(image_types) )
return NULL;
return image_types[type];
}
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