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mirror of https://github.com/topjohnwu/Magisk.git synced 2024-12-23 16:37:38 +00:00
2017-03-10 04:15:37 +08:00

65 lines
1.5 KiB
C

#include "magiskboot.h"
static void dump(unsigned char *buf, size_t size, const char *filename) {
int fd = open_new(filename);
if (write(fd, buf, size) != size)
error(1, "Cannot dump %s", filename);
close(fd);
}
void unpack(const char* image) {
size_t size;
unsigned char *orig;
mmap_ro(image, &orig, &size);
// Parse image
printf("Parsing boot image: [%s]\n\n", image);
parse_img(orig, size);
if (boot_type == CHROMEOS) {
// The caller should know it's chromeos, as it needs additional signing
dump(orig, 0, "chromeos");
}
char name[PATH_MAX];
// Dump kernel
if (mtk_kernel) {
kernel += 512;
hdr.kernel_size -= 512;
}
dump(kernel, hdr.kernel_size, KERNEL_FILE);
// Dump ramdisk
if (mtk_ramdisk) {
ramdisk += 512;
hdr.ramdisk_size -= 512;
}
if (decomp(ramdisk_type, RAMDISK_FILE, ramdisk, hdr.ramdisk_size)) {
// Dump the compressed ramdisk
dump(ramdisk, hdr.ramdisk_size, RAMDISK_FILE ".unsupport");
error(1, "Unsupported ramdisk format! Dumped to %s", RAMDISK_FILE ".unsupport");
}
if (hdr.second_size) {
// Dump second
dump(second, hdr.second_size, SECOND_FILE);
}
if (hdr.dt_size) {
if (boot_type == ELF && (dtb_type != QCDT && dtb_type != ELF)) {
printf("Non QC dtb found in ELF kernel, recreate kernel\n");
gzip(1, KERNEL_FILE, kernel, hdr.kernel_size);
int kfp = open(KERNEL_FILE, O_WRONLY | O_APPEND);
write(kfp, dtb, hdr.dt_size);
close(kfp);
} else {
// Dump dtb
dump(dtb, hdr.dt_size, DTB_FILE);
}
}
munmap(orig, size);
}