Magisk/jni/magiskboot/utils.c

147 lines
3.9 KiB
C

#include "magiskboot.h"
char *SUP_LIST[] = { "gzip", "xz", "lzma", "bzip2", "lz4", "lz4_legacy", NULL };
char *SUP_EXT_LIST[] = { "gz", "xz", "lzma", "bz2", "lz4", "lz4", NULL };
file_t SUP_TYPE_LIST[] = { GZIP, XZ, LZMA, BZIP2, LZ4, LZ4_LEGACY, 0 };
void mmap_ro(const char *filename, unsigned char **buf, size_t *size) {
int fd = xopen(filename, O_RDONLY);
*size = lseek(fd, 0, SEEK_END);
lseek(fd, 0, SEEK_SET);
*buf = xmmap(NULL, *size, PROT_READ, MAP_SHARED, fd, 0);
close(fd);
}
void mmap_rw(const char *filename, unsigned char **buf, size_t *size) {
int fd = xopen(filename, O_RDWR);
*size = lseek(fd, 0, SEEK_END);
lseek(fd, 0, SEEK_SET);
*buf = xmmap(NULL, *size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
close(fd);
}
file_t check_type(const unsigned char *buf) {
if (memcmp(buf, CHROMEOS_MAGIC, 8) == 0) {
return CHROMEOS;
} else if (memcmp(buf, BOOT_MAGIC, BOOT_MAGIC_SIZE) == 0) {
return AOSP;
} else if (memcmp(buf, ELF32_MAGIC, 5) == 0) {
return ELF32;
} else if (memcmp(buf, ELF64_MAGIC, 5) == 0) {
return ELF64;
} else if (memcmp(buf, "\x1f\x8b\x08\x00", 4) == 0) {
return GZIP;
} else if (memcmp(buf, "\x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a", 9) == 0) {
return LZOP;
} else if (memcmp(buf, "\xfd""7zXZ\x00", 6) == 0) {
return XZ;
} else if (memcmp(buf, "\x5d\x00\x00", 3) == 0
&& (buf[12] == (unsigned char) '\xff' || buf[12] == (unsigned char) '\x00')) {
return LZMA;
} else if (memcmp(buf, "BZh", 3) == 0) {
return BZIP2;
} else if (memcmp(buf, "\x04\x22\x4d\x18", 4) == 0) {
return LZ4;
} else if (memcmp(buf, "\x02\x21\x4c\x18", 4) == 0) {
return LZ4_LEGACY;
} else if (memcmp(buf, "\x88\x16\x88\x58", 4) == 0) {
return MTK;
} else {
return UNKNOWN;
}
}
void write_zero(int fd, size_t size) {
size_t pos = lseek(fd, 0, SEEK_CUR);
ftruncate(fd, pos + size);
lseek(fd, pos + size, SEEK_SET);
}
void mem_align(size_t *pos, size_t align) {
size_t mask = align - 1;
if (*pos & mask) {
*pos += align - (*pos & mask);
}
}
void file_align(int fd, size_t align, int out) {
size_t pos = lseek(fd, 0, SEEK_CUR);
size_t mask = align - 1;
size_t off;
if (pos & mask) {
off = align - (pos & mask);
if (out) {
write_zero(fd, off);
} else {
lseek(fd, pos + off, SEEK_SET);
}
}
}
int open_new(const char *filename) {
return xopen(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
}
void print_info() {
printf("KERNEL [%d] @ 0x%08x\n", hdr.kernel_size, hdr.kernel_addr);
printf("RAMDISK [%d] @ 0x%08x\n", hdr.ramdisk_size, hdr.ramdisk_addr);
printf("SECOND [%d] @ 0x%08x\n", hdr.second_size, hdr.second_addr);
printf("DTB [%d] @ 0x%08x\n", hdr.dt_size, hdr.tags_addr);
printf("PAGESIZE [%d]\n", hdr.page_size);
if (hdr.os_version != 0) {
int a,b,c,y,m = 0;
int os_version, os_patch_level;
os_version = hdr.os_version >> 11;
os_patch_level = hdr.os_version & 0x7ff;
a = (os_version >> 14) & 0x7f;
b = (os_version >> 7) & 0x7f;
c = os_version & 0x7f;
printf("OS_VERSION [%d.%d.%d]\n", a, b, c);
y = (os_patch_level >> 4) + 2000;
m = os_patch_level & 0xf;
printf("PATCH_LEVEL [%d-%02d]\n", y, m);
}
printf("NAME [%s]\n", hdr.name);
printf("CMDLINE [%s]\n", hdr.cmdline);
switch (ramdisk_type) {
case GZIP:
printf("COMPRESSION [%s]\n", "gzip");
break;
case XZ:
printf("COMPRESSION [%s]\n", "xz");
break;
case LZMA:
printf("COMPRESSION [%s]\n", "lzma");
break;
case BZIP2:
printf("COMPRESSION [%s]\n", "bzip2");
break;
case LZ4:
printf("COMPRESSION [%s]\n", "lz4");
break;
case LZ4_LEGACY:
printf("COMPRESSION [%s]\n", "lz4_legacy");
break;
default:
fprintf(stderr, "Unknown ramdisk format!\n");
}
printf("\n");
}
void cleanup() {
printf("Cleaning up...\n");
char name[PATH_MAX];
unlink(KERNEL_FILE);
unlink(RAMDISK_FILE);
unlink(RAMDISK_FILE ".unsupport");
unlink(SECOND_FILE);
unlink(DTB_FILE);
for (int i = 0; SUP_EXT_LIST[i]; ++i) {
sprintf(name, "%s.%s", RAMDISK_FILE, SUP_EXT_LIST[i]);
unlink(name);
}
}