mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-12-02 22:45:27 +00:00
183 lines
4.7 KiB
C
183 lines
4.7 KiB
C
#include "magiskboot.h"
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#include "elf.h"
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char *SUP_EXT_LIST[SUP_NUM] = { "gz", "xz", "lzma", "bz2", "lz4", "lz4" };
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file_t SUP_TYPE_LIST[SUP_NUM] = { GZIP, XZ, LZMA, BZIP2, LZ4, LZ4_LEGACY };
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void mmap_ro(const char *filename, unsigned char **buf, size_t *size) {
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int fd = open(filename, O_RDONLY);
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if (fd < 0)
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error(1, "Cannot open %s", filename);
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*size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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*buf = mmap(NULL, *size, PROT_READ, MAP_SHARED, fd, 0);
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close(fd);
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}
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void mmap_rw(const char *filename, unsigned char **buf, size_t *size) {
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int fd = open(filename, O_RDWR);
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if (fd < 0)
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error(1, "Cannot open %s", filename);
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*size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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*buf = mmap(NULL, *size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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close(fd);
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}
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file_t check_type(const unsigned char *buf) {
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if (memcmp(buf, CHROMEOS_MAGIC, CHROMEOS_MAGIC_SIZE) == 0) {
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return CHROMEOS;
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} else if (memcmp(buf, BOOT_MAGIC, BOOT_MAGIC_SIZE) == 0) {
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return AOSP;
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} else if (memcmp(buf, ELF_MAGIC, ELF_MAGIC_SIZE) == 0) {
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return ELF;
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} else if (memcmp(buf, "\x1f\x8b\x08\x00", 4) == 0) {
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return GZIP;
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} else if (memcmp(buf, "\x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a", 9) == 0) {
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return LZOP;
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} else if (memcmp(buf, "\xfd""7zXZ\x00", 6) == 0) {
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return XZ;
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} else if (memcmp(buf, "\x5d\x00\x00", 3) == 0
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&& (buf[12] == (unsigned char) '\xff' || buf[12] == (unsigned char) '\x00')) {
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return LZMA;
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} else if (memcmp(buf, "BZh", 3) == 0) {
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return BZIP2;
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} else if (memcmp(buf, "\x04\x22\x4d\x18", 4) == 0) {
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return LZ4;
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} else if (memcmp(buf, "\x02\x21\x4c\x18", 4) == 0) {
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return LZ4_LEGACY;
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} else if (memcmp(buf, "\x88\x16\x88\x58", 4) == 0) {
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return MTK;
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} else if (memcmp(buf, "QCDT", 4) == 0) {
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return QCDT;
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} else {
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return UNKNOWN;
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}
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}
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void write_zero(int fd, size_t size) {
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size_t pos = lseek(fd, 0, SEEK_CUR);
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ftruncate(fd, pos + size);
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lseek(fd, pos + size, SEEK_SET);
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}
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void mem_align(size_t *pos, size_t align) {
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size_t mask = align - 1;
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if (*pos & mask) {
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*pos += align - (*pos & mask);
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}
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}
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void file_align(int fd, size_t align, int out) {
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size_t pos = lseek(fd, 0, SEEK_CUR);
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size_t mask = align - 1;
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size_t off;
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if (pos & mask) {
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off = align - (pos & mask);
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if (out) {
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write_zero(fd, off);
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} else {
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lseek(fd, pos + off, SEEK_SET);
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}
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}
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}
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int open_new(const char *filename) {
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int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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if (fd < 0)
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error(1, "Unable to create %s", filename);
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return fd;
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}
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void print_info() {
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printf("KERNEL [%d] @ 0x%08x\n", hdr.kernel_size, hdr.kernel_addr);
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printf("RAMDISK [%d] @ 0x%08x\n", hdr.ramdisk_size, hdr.ramdisk_addr);
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printf("SECOND [%d] @ 0x%08x\n", hdr.second_size, hdr.second_addr);
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printf("DTB [%d] @ 0x%08x\n", hdr.dt_size, hdr.tags_addr);
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printf("PAGESIZE [%d]\n", hdr.page_size);
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if (hdr.os_version != 0) {
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int a,b,c,y,m = 0;
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int os_version, os_patch_level;
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os_version = hdr.os_version >> 11;
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os_patch_level = hdr.os_version & 0x7ff;
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a = (os_version >> 14) & 0x7f;
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b = (os_version >> 7) & 0x7f;
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c = os_version & 0x7f;
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printf("OS_VERSION [%d.%d.%d]\n", a, b, c);
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y = (os_patch_level >> 4) + 2000;
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m = os_patch_level & 0xf;
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printf("PATCH_LEVEL [%d-%02d]\n", y, m);
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}
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printf("NAME [%s]\n", hdr.name);
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printf("CMDLINE [%s]\n", hdr.cmdline);
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switch (ramdisk_type) {
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case GZIP:
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printf("COMPRESSION [%s]\n", "gzip");
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break;
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case XZ:
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printf("COMPRESSION [%s]\n", "xz");
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break;
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case LZMA:
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printf("COMPRESSION [%s]\n", "lzma");
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break;
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case BZIP2:
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printf("COMPRESSION [%s]\n", "bzip2");
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break;
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case LZ4:
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printf("COMPRESSION [%s]\n", "lz4");
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break;
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case LZ4_LEGACY:
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printf("COMPRESSION [%s]\n", "lz4_legacy");
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break;
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default:
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fprintf(stderr, "Unknown ramdisk format!\n");
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}
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printf("\n");
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}
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void cleanup() {
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printf("Cleaning up...\n");
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char name[PATH_MAX];
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unlink(KERNEL_FILE);
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unlink(RAMDISK_FILE);
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unlink(RAMDISK_FILE ".unsupport");
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unlink(SECOND_FILE);
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unlink(DTB_FILE);
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unlink(NEW_BOOT);
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for (int i = 0; i < SUP_NUM; ++i) {
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sprintf(name, "%s.%s", RAMDISK_FILE, SUP_EXT_LIST[i]);
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unlink(name);
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}
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}
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void vec_init(vector *v) {
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vec_size(v) = 0;
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vec_cap(v) = 1;
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vec_entry(v) = malloc(sizeof(void*));
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}
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void vec_push_back(vector *v, void *p) {
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if (v == NULL) return;
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if (vec_size(v) == vec_cap(v)) {
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vec_cap(v) *= 2;
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vec_entry(v) = realloc(vec_entry(v), sizeof(void*) * vec_cap(v));
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}
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vec_entry(v)[vec_size(v)] = p;
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++vec_size(v);
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}
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void vec_sort(vector *v, int (*compar)(const void *, const void *)) {
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qsort(vec_entry(v), vec_size(v), sizeof(void*), compar);
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}
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void vec_destroy(vector *v) {
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// Will not free each entry!
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// Manually free each entry, then call this function
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vec_size(v) = 0;
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vec_cap(v) = 0;
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free(v->data);
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}
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