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Add dtb test command

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This commit is contained in:
topjohnwu 2017-11-11 01:30:33 +08:00
parent 9136573596
commit e9d0f615ba
3 changed files with 39 additions and 21 deletions
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29
jni/magiskboot/dtb.c
View File

@ -41,7 +41,7 @@ static int find_fstab(const void *fdt, int parent) {
return -1;
}
void dtb_dump(const char *file) {
static void dtb_dump(const char *file) {
size_t size ;
void *dtb, *fdt;
fprintf(stderr, "Loading dtbs from [%s]\n", file);
@ -60,13 +60,16 @@ void dtb_dump(const char *file) {
exit(0);
}
void dtb_patch(const char *file) {
static void dtb_patch(const char *file, int patch) {
size_t size ;
void *dtb, *fdt;
fprintf(stderr, "Loading dtbs from [%s]\n\n", file);
if (patch)
mmap_rw(file, &dtb, &size);
else
mmap_ro(file, &dtb, &size);
// Loop through all the dtbs
int dtb_num = 0, patched = 0;
int dtb_num = 0, found = 0;
for (int i = 0; i < size; ++i) {
if (memcmp(dtb + i, DTB_MAGIC, 4) == 0) {
fdt = dtb + i;
@ -80,10 +83,15 @@ void dtb_patch(const char *file) {
char *value = (char *) fdt_getprop(fdt, block, "fsmgr_flags", &value_size);
for (int i = 0; i < value_size; ++i) {
if ((skip = check_verity_pattern(value + i)) > 0) {
if (patch) {
fprintf(stderr, "Remove pattern [%.*s] in [fsmgr_flags]\n", skip, value + i);
memcpy(value + i, value + i + skip, value_size - i - skip);
memset(value + value_size - skip, '\0', skip);
patched = 1;
} else {
fprintf(stderr, "Found pattern [%.*s] in [fsmgr_flags]\n", skip, value + i);
i += skip - 1;
}
found = 1;
}
}
}
@ -92,7 +100,18 @@ void dtb_patch(const char *file) {
}
fprintf(stderr, "\n");
munmap(dtb, size);
exit(!patched);
exit(!found);
}
int dtb_commands(const char *cmd, int argc, char *argv[]) {
if (argc == 0) return 1;
if (strcmp(cmd, "dump") == 0)
dtb_dump(argv[0]);
else if (strcmp(cmd, "patch") == 0)
dtb_patch(argv[0], 1);
else if (strcmp(cmd, "test") == 0)
dtb_patch(argv[0], 0);
return 0;
}

5
jni/magiskboot/magiskboot.h
View File

@ -18,11 +18,10 @@ void unpack(const char *image);
void repack(const char* orig_image, const char* out_image);
void hexpatch(const char *image, const char *from, const char *to);
int parse_img(void *orig, size_t size, boot_img *boot);
int cpio_commands(const char *command, int argc, char *argv[]);
int cpio_commands(const char *cmd, int argc, char *argv[]);
void comp_file(const char *method, const char *from, const char *to);
void decomp_file(char *from, const char *to);
void dtb_dump(const char *file);
void dtb_patch(const char *file);
int dtb_commands(const char *cmd, int argc, char *argv[]);
// Compressions
size_t gzip(int mode, int fd, const void *buf, size_t size);

18
jni/magiskboot/main.c
View File

@ -124,10 +124,6 @@ int main(int argc, char *argv[]) {
repack(argv[2], argc > 3 ? argv[3] : NEW_BOOT);
} else if (argc > 2 && strcmp(argv[1], "--decompress") == 0) {
decomp_file(argv[2], argc > 3 ? argv[3] : NULL);
} else if (argc > 2 && strcmp(argv[1], "--dtb-dump") == 0) {
dtb_dump(argv[2]);
} else if (argc > 2 && strcmp(argv[1], "--dtb-patch") == 0) {
dtb_patch(argv[2]);
} else if (argc > 2 && strncmp(argv[1], "--compress", 10) == 0) {
char *method;
method = strchr(argv[1], '=');
@ -137,11 +133,15 @@ int main(int argc, char *argv[]) {
} else if (argc > 4 && strcmp(argv[1], "--hexpatch") == 0) {
hexpatch(argv[2], argv[3], argv[4]);
} else if (argc > 2 && strncmp(argv[1], "--cpio", 6) == 0) {
char *command;
command = strchr(argv[1] + 2, '-');
if (command == NULL) usage(argv[0]);
else ++command;
if (cpio_commands(command, argc - 2, argv + 2)) usage(argv[0]);
char *cmd = argv[1] + 6;
if (*cmd == '\0') usage(argv[0]);
else ++cmd;
if (cpio_commands(cmd, argc - 2, argv + 2)) usage(argv[0]);
} else if (argc > 2 && strncmp(argv[1], "--dtb", 5) == 0) {
char *cmd = argv[1] + 5;
if (*cmd == '\0') usage(argv[0]);
else ++cmd;
if (dtb_commands(cmd, argc - 2, argv + 2)) usage(argv[0]);
} else {
usage(argv[0]);
}