diff options
Diffstat (limited to 'cmds/idmap/inspect.cpp')
| -rw-r--r-- | cmds/idmap/inspect.cpp | 299 |
1 files changed, 159 insertions, 140 deletions
diff --git a/cmds/idmap/inspect.cpp b/cmds/idmap/inspect.cpp index a59f5d3..b9ac8a5 100644 --- a/cmds/idmap/inspect.cpp +++ b/cmds/idmap/inspect.cpp @@ -10,92 +10,108 @@ using namespace android; -#define NEXT(b, i, o) do { if (buf.next(&i, &o) < 0) { return -1; } } while (0) - namespace { - static const uint32_t IDMAP_MAGIC = 0x706d6469; + static const uint32_t IDMAP_MAGIC = 0x504D4449; static const size_t PATH_LENGTH = 256; - static const uint32_t IDMAP_HEADER_SIZE = (3 + 2 * (PATH_LENGTH / sizeof(uint32_t))); void printe(const char *fmt, ...); class IdmapBuffer { private: - char *buf_; + const char* buf_; size_t len_; - mutable size_t pos_; + size_t pos_; public: - IdmapBuffer() : buf_((char *)MAP_FAILED), len_(0), pos_(0) {} + IdmapBuffer() : buf_((const char *)MAP_FAILED), len_(0), pos_(0) {} ~IdmapBuffer() { if (buf_ != MAP_FAILED) { - munmap(buf_, len_); + munmap(const_cast<char*>(buf_), len_); } } - int init(const char *idmap_path) - { + status_t init(const char *idmap_path) { struct stat st; int fd; if (stat(idmap_path, &st) < 0) { printe("failed to stat idmap '%s': %s\n", idmap_path, strerror(errno)); - return -1; + return UNKNOWN_ERROR; } len_ = st.st_size; if ((fd = TEMP_FAILURE_RETRY(open(idmap_path, O_RDONLY))) < 0) { printe("failed to open idmap '%s': %s\n", idmap_path, strerror(errno)); - return -1; + return UNKNOWN_ERROR; } - if ((buf_ = (char*)mmap(NULL, len_, PROT_READ, MAP_PRIVATE, fd, 0)) == MAP_FAILED) { + if ((buf_ = (const char*)mmap(NULL, len_, PROT_READ, MAP_PRIVATE, fd, 0)) == MAP_FAILED) { close(fd); printe("failed to mmap idmap: %s\n", strerror(errno)); - return -1; + return UNKNOWN_ERROR; } close(fd); - return 0; + return NO_ERROR; } - int next(uint32_t *i, uint32_t *offset) const - { + status_t nextUint32(uint32_t* i) { if (!buf_) { printe("failed to read next uint32_t: buffer not initialized\n"); - return -1; + return UNKNOWN_ERROR; } - if (pos_ + 4 > len_) { + + if (pos_ + sizeof(uint32_t) > len_) { printe("failed to read next uint32_t: end of buffer reached at pos=0x%08x\n", pos_); - return -1; + return UNKNOWN_ERROR; + } + + if ((reinterpret_cast<uintptr_t>(buf_ + pos_) & 0x3) != 0) { + printe("failed to read next uint32_t: not aligned on 4-byte boundary\n"); + return UNKNOWN_ERROR; } - *offset = pos_ / sizeof(uint32_t); - char a = buf_[pos_++]; - char b = buf_[pos_++]; - char c = buf_[pos_++]; - char d = buf_[pos_++]; - *i = (d << 24) | (c << 16) | (b << 8) | a; - return 0; + + *i = dtohl(*reinterpret_cast<const uint32_t*>(buf_ + pos_)); + pos_ += sizeof(uint32_t); + return NO_ERROR; } - int nextPath(char *b, uint32_t *offset_start, uint32_t *offset_end) const - { + status_t nextUint16(uint16_t* i) { + if (!buf_) { + printe("failed to read next uint16_t: buffer not initialized\n"); + return UNKNOWN_ERROR; + } + + if (pos_ + sizeof(uint16_t) > len_) { + printe("failed to read next uint16_t: end of buffer reached at pos=0x%08x\n", + pos_); + return UNKNOWN_ERROR; + } + + if ((reinterpret_cast<uintptr_t>(buf_ + pos_) & 0x1) != 0) { + printe("failed to read next uint32_t: not aligned on 2-byte boundary\n"); + return UNKNOWN_ERROR; + } + + *i = dtohs(*reinterpret_cast<const uint16_t*>(buf_ + pos_)); + pos_ += sizeof(uint16_t); + return NO_ERROR; + } + + status_t nextPath(char *b) { if (!buf_) { printe("failed to read next path: buffer not initialized\n"); - return -1; + return UNKNOWN_ERROR; } if (pos_ + PATH_LENGTH > len_) { printe("failed to read next path: end of buffer reached at pos=0x%08x\n", pos_); - return -1; + return UNKNOWN_ERROR; } memcpy(b, buf_ + pos_, PATH_LENGTH); - *offset_start = pos_ / sizeof(uint32_t); pos_ += PATH_LENGTH; - *offset_end = pos_ / sizeof(uint32_t) - 1; - return 0; + return NO_ERROR; } }; - void printe(const char *fmt, ...) - { + void printe(const char *fmt, ...) { va_list ap; va_start(ap, fmt); @@ -104,44 +120,37 @@ namespace { va_end(ap); } - void print_header() - { - printf("SECTION ENTRY VALUE OFFSET COMMENT\n"); + void print_header() { + printf("SECTION ENTRY VALUE COMMENT\n"); } - void print(const char *section, const char *subsection, uint32_t value, uint32_t offset, - const char *fmt, ...) - { + void print(const char *section, const char *subsection, uint32_t value, const char *fmt, ...) { va_list ap; va_start(ap, fmt); - printf("%-12s %-12s 0x%08x 0x%-4x ", section, subsection, value, offset); + printf("%-12s %-12s 0x%08x ", section, subsection, value); vprintf(fmt, ap); printf("\n"); va_end(ap); } - void print_path(const char *section, const char *subsection, uint32_t offset_start, - uint32_t offset_end, const char *fmt, ...) - { + void print_path(const char *section, const char *subsection, const char *fmt, ...) { va_list ap; va_start(ap, fmt); - printf("%-12s %-12s .......... 0x%02x-0x%02x ", section, subsection, offset_start, - offset_end); + printf("%-12s %-12s .......... ", section, subsection); vprintf(fmt, ap); printf("\n"); va_end(ap); } - int resource_metadata(const AssetManager& am, uint32_t res_id, - String8 *package, String8 *type, String8 *name) - { + status_t resource_metadata(const AssetManager& am, uint32_t res_id, + String8 *package, String8 *type, String8 *name) { const ResTable& rt = am.getResources(); struct ResTable::resource_name data; if (!rt.getResourceName(res_id, false, &data)) { printe("failed to get resource name id=0x%08x\n", res_id); - return -1; + return UNKNOWN_ERROR; } if (package) { *package = String8(String16(data.package, data.packageLen)); @@ -152,140 +161,150 @@ namespace { if (name) { *name = String8(String16(data.name, data.nameLen)); } - return 0; - } - - int package_id(const AssetManager& am) - { - return (am.getResources().getBasePackageId(0)) << 24; + return NO_ERROR; } - int parse_idmap_header(const IdmapBuffer& buf, AssetManager& am) - { - uint32_t i, o, e; + status_t parse_idmap_header(IdmapBuffer& buf, AssetManager& am) { + uint32_t i; char path[PATH_LENGTH]; - NEXT(buf, i, o); + status_t err = buf.nextUint32(&i); + if (err != NO_ERROR) { + return err; + } + if (i != IDMAP_MAGIC) { printe("not an idmap file: actual magic constant 0x%08x does not match expected magic " "constant 0x%08x\n", i, IDMAP_MAGIC); - return -1; + return UNKNOWN_ERROR; } + print_header(); - print("IDMAP HEADER", "magic", i, o, ""); + print("IDMAP HEADER", "magic", i, ""); + + err = buf.nextUint32(&i); + if (err != NO_ERROR) { + return err; + } + print("", "version", i, ""); - NEXT(buf, i, o); - print("", "base crc", i, o, ""); + err = buf.nextUint32(&i); + if (err != NO_ERROR) { + return err; + } + print("", "base crc", i, ""); - NEXT(buf, i, o); - print("", "overlay crc", i, o, ""); + err = buf.nextUint32(&i); + if (err != NO_ERROR) { + return err; + } + print("", "overlay crc", i, ""); - if (buf.nextPath(path, &o, &e) < 0) { + err = buf.nextPath(path); + if (err != NO_ERROR) { // printe done from IdmapBuffer::nextPath - return -1; + return err; } - print_path("", "base path", o, e, "%s", path); + print_path("", "base path", "%s", path); + if (!am.addAssetPath(String8(path), NULL)) { printe("failed to add '%s' as asset path\n", path); - return -1; + return UNKNOWN_ERROR; } - if (buf.nextPath(path, &o, &e) < 0) { + err = buf.nextPath(path); + if (err != NO_ERROR) { // printe done from IdmapBuffer::nextPath - return -1; + return err; } - print_path("", "overlay path", o, e, "%s", path); + print_path("", "overlay path", "%s", path); - return 0; + return NO_ERROR; } - int parse_data_header(const IdmapBuffer& buf, const AssetManager& am, Vector<uint32_t>& types) - { - uint32_t i, o; - const uint32_t numeric_package = package_id(am); + status_t parse_data(IdmapBuffer& buf, const AssetManager& am) { + const uint32_t packageId = am.getResources().getBasePackageId(0); - NEXT(buf, i, o); - print("DATA HEADER", "types count", i, o, ""); - const uint32_t N = i; + uint16_t data16; + status_t err = buf.nextUint16(&data16); + if (err != NO_ERROR) { + return err; + } + print("DATA HEADER", "target pkg", static_cast<uint32_t>(data16), ""); - for (uint32_t j = 0; j < N; ++j) { - NEXT(buf, i, o); - if (i == 0) { - print("", "padding", i, o, ""); - } else { - String8 type; - const uint32_t numeric_type = (j + 1) << 16; - const uint32_t res_id = numeric_package | numeric_type; - if (resource_metadata(am, res_id, NULL, &type, NULL) < 0) { - // printe done from resource_metadata - return -1; - } - print("", "type offset", i, o, "absolute offset 0x%02x, %s", - i + IDMAP_HEADER_SIZE, type.string()); - types.add(numeric_type); - } + err = buf.nextUint16(&data16); + if (err != NO_ERROR) { + return err; } + print("", "types count", static_cast<uint32_t>(data16), ""); - return 0; - } + uint32_t typeCount = static_cast<uint32_t>(data16); + while (typeCount > 0) { + typeCount--; + + err = buf.nextUint16(&data16); + if (err != NO_ERROR) { + return err; + } + const uint32_t targetTypeId = static_cast<uint32_t>(data16); + print("DATA BLOCK", "target type", targetTypeId, ""); - int parse_data_block(const IdmapBuffer& buf, const AssetManager& am, size_t numeric_type) - { - uint32_t i, o, n, id_offset; - const uint32_t numeric_package = package_id(am); - - NEXT(buf, i, o); - print("DATA BLOCK", "entry count", i, o, ""); - n = i; - - NEXT(buf, i, o); - print("", "entry offset", i, o, ""); - id_offset = i; - - for ( ; n > 0; --n) { - String8 type, name; - - NEXT(buf, i, o); - if (i == 0) { - print("", "padding", i, o, ""); - } else { - uint32_t res_id = numeric_package | numeric_type | id_offset; - if (resource_metadata(am, res_id, NULL, &type, &name) < 0) { - // printe done from resource_metadata - return -1; + err = buf.nextUint16(&data16); + if (err != NO_ERROR) { + return err; + } + print("", "overlay type", static_cast<uint32_t>(data16), ""); + + err = buf.nextUint16(&data16); + if (err != NO_ERROR) { + return err; + } + const uint32_t entryCount = static_cast<uint32_t>(data16); + print("", "entry count", entryCount, ""); + + err = buf.nextUint16(&data16); + if (err != NO_ERROR) { + return err; + } + const uint32_t entryOffset = static_cast<uint32_t>(data16); + print("", "entry offset", entryOffset, ""); + + for (uint32_t i = 0; i < entryCount; i++) { + uint32_t data32; + err = buf.nextUint32(&data32); + if (err != NO_ERROR) { + return err; } - print("", "entry", i, o, "%s/%s", type.string(), name.string()); + + uint32_t resID = (packageId << 24) | (targetTypeId << 16) | (entryOffset + i); + String8 type; + String8 name; + err = resource_metadata(am, resID, NULL, &type, &name); + if (err != NO_ERROR) { + return err; + } + print("", "entry", data32, "%s/%s", type.string(), name.string()); } - ++id_offset; } - return 0; + return NO_ERROR; } } -int idmap_inspect(const char *idmap_path) -{ +int idmap_inspect(const char *idmap_path) { IdmapBuffer buf; if (buf.init(idmap_path) < 0) { // printe done from IdmapBuffer::init return EXIT_FAILURE; } AssetManager am; - if (parse_idmap_header(buf, am) < 0) { + if (parse_idmap_header(buf, am) != NO_ERROR) { // printe done from parse_idmap_header return EXIT_FAILURE; } - Vector<uint32_t> types; - if (parse_data_header(buf, am, types) < 0) { + if (parse_data(buf, am) != NO_ERROR) { // printe done from parse_data_header return EXIT_FAILURE; } - const size_t N = types.size(); - for (size_t i = 0; i < N; ++i) { - if (parse_data_block(buf, am, types.itemAt(i)) < 0) { - // printe done from parse_data_block - return EXIT_FAILURE; - } - } return EXIT_SUCCESS; } |