* All memory-mapped structures are 32-bit aligned unless otherwise noted.
*/
-#ifndef _LIBDEX_DEXFILE
-#define _LIBDEX_DEXFILE
+#ifndef LIBDEX_DEXFILE_H_
+#define LIBDEX_DEXFILE_H_
#include "vm/Common.h" // basic type defs, e.g. u1/u2/u4/u8, and LOG
#include "libdex/SysUtil.h"
-#ifdef __cplusplus
-extern "C" {
-#endif
-
/*
* gcc-style inline management -- ensures we have a copy of all functions
* in the library, so code that links against us will work whether or not
/* DEX file magic number */
#define DEX_MAGIC "dex\n"
-/* version, encoded in 4 bytes of ASCII */
-#define DEX_MAGIC_VERS "035\0"
+
+/* current version, encoded in 4 bytes of ASCII */
+#define DEX_MAGIC_VERS "036\0"
+
+/*
+ * older but still-recognized version (corresponding to Android API
+ * levels 13 and earlier
+ */
+#define DEX_MAGIC_VERS_API_13 "035\0"
/* same, but for optimized DEX header */
#define DEX_OPT_MAGIC "dey\n"
/*
* Enumeration of all the primitive types.
*/
-typedef enum PrimitiveType {
+enum PrimitiveType {
PRIM_NOT = 0, /* value is a reference type, not a primitive type */
PRIM_VOID = 1,
PRIM_BOOLEAN = 2,
PRIM_LONG = 7,
PRIM_FLOAT = 8,
PRIM_DOUBLE = 9,
-} PrimitiveType;
+};
/*
* access flags and masks; the "standard" ones are all <= 0x4000
/*
* Direct-mapped "header_item" struct.
*/
-typedef struct DexHeader {
+struct DexHeader {
u1 magic[8]; /* includes version number */
u4 checksum; /* adler32 checksum */
u1 signature[kSHA1DigestLen]; /* SHA-1 hash */
u4 classDefsOff;
u4 dataSize;
u4 dataOff;
-} DexHeader;
+};
/*
* Direct-mapped "map_item".
*/
-typedef struct DexMapItem {
- u2 type; /* type code (see kDexType* above) */
- u2 unused;
- u4 size; /* count of items of the indicated type */
- u4 offset; /* file offset to the start of data */
-} DexMapItem;
+struct DexMapItem {
+ u2 type; /* type code (see kDexType* above) */
+ u2 unused;
+ u4 size; /* count of items of the indicated type */
+ u4 offset; /* file offset to the start of data */
+};
/*
* Direct-mapped "map_list".
*/
-typedef struct DexMapList {
+struct DexMapList {
u4 size; /* #of entries in list */
DexMapItem list[1]; /* entries */
-} DexMapList;
+};
/*
* Direct-mapped "string_id_item".
*/
-typedef struct DexStringId {
- u4 stringDataOff; /* file offset to string_data_item */
-} DexStringId;
+struct DexStringId {
+ u4 stringDataOff; /* file offset to string_data_item */
+};
/*
* Direct-mapped "type_id_item".
*/
-typedef struct DexTypeId {
+struct DexTypeId {
u4 descriptorIdx; /* index into stringIds list for type descriptor */
-} DexTypeId;
+};
/*
* Direct-mapped "field_id_item".
*/
-typedef struct DexFieldId {
+struct DexFieldId {
u2 classIdx; /* index into typeIds list for defining class */
u2 typeIdx; /* index into typeIds for field type */
u4 nameIdx; /* index into stringIds for field name */
-} DexFieldId;
+};
/*
* Direct-mapped "method_id_item".
*/
-typedef struct DexMethodId {
+struct DexMethodId {
u2 classIdx; /* index into typeIds list for defining class */
u2 protoIdx; /* index into protoIds for method prototype */
u4 nameIdx; /* index into stringIds for method name */
-} DexMethodId;
+};
/*
* Direct-mapped "proto_id_item".
*/
-typedef struct DexProtoId {
+struct DexProtoId {
u4 shortyIdx; /* index into stringIds for shorty descriptor */
u4 returnTypeIdx; /* index into typeIds list for return type */
u4 parametersOff; /* file offset to type_list for parameter types */
-} DexProtoId;
+};
/*
* Direct-mapped "class_def_item".
*/
-typedef struct DexClassDef {
+struct DexClassDef {
u4 classIdx; /* index into typeIds for this class */
u4 accessFlags;
u4 superclassIdx; /* index into typeIds for superclass */
u4 annotationsOff; /* file offset to annotations_directory_item */
u4 classDataOff; /* file offset to class_data_item */
u4 staticValuesOff; /* file offset to DexEncodedArray */
-} DexClassDef;
+};
/*
* Direct-mapped "type_item".
*/
-typedef struct DexTypeItem {
+struct DexTypeItem {
u2 typeIdx; /* index into typeIds */
-} DexTypeItem;
+};
/*
* Direct-mapped "type_list".
*/
-typedef struct DexTypeList {
+struct DexTypeList {
u4 size; /* #of entries in list */
DexTypeItem list[1]; /* entries */
-} DexTypeList;
+};
/*
* Direct-mapped "code_item".
* "debugInfo" is used when displaying an exception stack trace or
* debugging. An offset of zero indicates that there are no entries.
*/
-typedef struct DexCode {
+struct DexCode {
u2 registersSize;
u2 insSize;
u2 outsSize;
/* followed by try_item[triesSize] */
/* followed by uleb128 handlersSize */
/* followed by catch_handler_item[handlersSize] */
-} DexCode;
+};
/*
* Direct-mapped "try_item".
*/
-typedef struct DexTry {
+struct DexTry {
u4 startAddr; /* start address, in 16-bit code units */
u2 insnCount; /* instruction count, in 16-bit code units */
u2 handlerOff; /* offset in encoded handler data to handlers */
-} DexTry;
+};
/*
* Link table. Currently undefined.
*/
-typedef struct DexLink {
+struct DexLink {
u1 bleargh;
-} DexLink;
+};
/*
* Direct-mapped "annotations_directory_item".
*/
-typedef struct DexAnnotationsDirectoryItem {
+struct DexAnnotationsDirectoryItem {
u4 classAnnotationsOff; /* offset to DexAnnotationSetItem */
u4 fieldsSize; /* count of DexFieldAnnotationsItem */
u4 methodsSize; /* count of DexMethodAnnotationsItem */
/* followed by DexFieldAnnotationsItem[fieldsSize] */
/* followed by DexMethodAnnotationsItem[methodsSize] */
/* followed by DexParameterAnnotationsItem[parametersSize] */
-} DexAnnotationsDirectoryItem;
+};
/*
* Direct-mapped "field_annotations_item".
*/
-typedef struct DexFieldAnnotationsItem {
+struct DexFieldAnnotationsItem {
u4 fieldIdx;
u4 annotationsOff; /* offset to DexAnnotationSetItem */
-} DexFieldAnnotationsItem;
+};
/*
* Direct-mapped "method_annotations_item".
*/
-typedef struct DexMethodAnnotationsItem {
+struct DexMethodAnnotationsItem {
u4 methodIdx;
u4 annotationsOff; /* offset to DexAnnotationSetItem */
-} DexMethodAnnotationsItem;
+};
/*
* Direct-mapped "parameter_annotations_item".
*/
-typedef struct DexParameterAnnotationsItem {
+struct DexParameterAnnotationsItem {
u4 methodIdx;
u4 annotationsOff; /* offset to DexAnotationSetRefList */
-} DexParameterAnnotationsItem;
+};
/*
* Direct-mapped "annotation_set_ref_item".
*/
-typedef struct DexAnnotationSetRefItem {
+struct DexAnnotationSetRefItem {
u4 annotationsOff; /* offset to DexAnnotationSetItem */
-} DexAnnotationSetRefItem;
+};
/*
* Direct-mapped "annotation_set_ref_list".
*/
-typedef struct DexAnnotationSetRefList {
+struct DexAnnotationSetRefList {
u4 size;
DexAnnotationSetRefItem list[1];
-} DexAnnotationSetRefList;
+};
/*
* Direct-mapped "annotation_set_item".
*/
-typedef struct DexAnnotationSetItem {
+struct DexAnnotationSetItem {
u4 size;
u4 entries[1]; /* offset to DexAnnotationItem */
-} DexAnnotationSetItem;
+};
/*
* Direct-mapped "annotation_item".
*
* NOTE: this structure is byte-aligned.
*/
-typedef struct DexAnnotationItem {
+struct DexAnnotationItem {
u1 visibility;
u1 annotation[1]; /* data in encoded_annotation format */
-} DexAnnotationItem;
+};
/*
* Direct-mapped "encoded_array".
*
* NOTE: this structure is byte-aligned.
*/
-typedef struct DexEncodedArray {
+struct DexEncodedArray {
u1 array[1]; /* data in encoded_array format */
-} DexEncodedArray;
+};
/*
* Lookup table for classes. It provides a mapping from class name to
* a hash table with direct pointers to the items, but because it's shared
* there's less of a penalty for using a fairly sparse table.
*/
-typedef struct DexClassLookup {
+struct DexClassLookup {
int size; // total size, including "size"
int numEntries; // size of table[]; always power of 2
struct {
int classDescriptorOffset; // in bytes, from start of DEX
int classDefOffset; // in bytes, from start of DEX
} table[1];
-} DexClassLookup;
+};
/*
* Header added by DEX optimization pass. Values are always written in
*
* Try to keep this simple and fixed-size.
*/
-typedef struct DexOptHeader {
+struct DexOptHeader {
u1 magic[8]; /* includes version number */
u4 dexOffset; /* file offset of DEX header */
u4 checksum; /* adler32 checksum covering deps/opt */
/* pad for 64-bit alignment if necessary */
-} DexOptHeader;
+};
#define DEX_OPT_FLAG_BIG (1<<1) /* swapped to big-endian */
* Code should regard DexFile as opaque, using the API calls provided here
* to access specific structures.
*/
-typedef struct DexFile {
+struct DexFile {
/* directly-mapped "opt" header */
const DexOptHeader* pOptHeader;
/* additional app-specific data structures associated with the DEX */
//void* auxData;
-} DexFile;
+};
/*
* Utility function -- rounds up to the nearest power of 2.
int dexSwapAndVerifyIfNecessary(u1* addr, int len);
/*
+ * Check to see if the file magic and format version in the given
+ * header are recognized as valid. Returns true if they are
+ * acceptable.
+ */
+bool dexHasValidMagic(const DexHeader* pHeader);
+
+/*
* Compute DEX checksum.
*/
u4 dexComputeChecksum(const DexHeader* pHeader);
const u2* insnsEnd = &pCode->insns[pCode->insnsSize];
// Round to four bytes.
- if ((((u4) insnsEnd) & 3) != 0) {
+ if ((((uintptr_t) insnsEnd) & 3) != 0) {
insnsEnd++;
}
DEX_INLINE const DexAnnotationSetItem* dexGetAnnotationSetItem(
const DexFile* pDexFile, u4 offset)
{
+ if (offset == 0) {
+ return NULL;
+ }
return (const DexAnnotationSetItem*) (pDexFile->baseAddr + offset);
}
/* get the class' annotation set */
DEX_INLINE const DexAnnotationSetItem* dexGetClassAnnotationSet(
const DexFile* pDexFile, const DexAnnotationsDirectoryItem* pAnnoDir)
{
- if (pAnnoDir->classAnnotationsOff == 0)
- return NULL;
return dexGetAnnotationSetItem(pDexFile, pAnnoDir->classAnnotationsOff);
}
DEX_INLINE const DexAnnotationSetRefList* dexGetParameterAnnotationSetRefList(
const DexFile* pDexFile, const DexParameterAnnotationsItem* pItem)
{
- return (const DexAnnotationSetRefList*)
- (pDexFile->baseAddr + pItem->annotationsOff);
+ if (pItem->annotationsOff == 0) {
+ return NULL;
+ }
+ return (const DexAnnotationSetRefList*) (pDexFile->baseAddr + pItem->annotationsOff);
}
/* get method annotation list size */
DEX_INLINE int dexGetParameterAnnotationSetRefSize(const DexFile* pDexFile,
const DexParameterAnnotationsItem* pItem)
{
- if (pItem->annotationsOff == 0)
+ if (pItem->annotationsOff == 0) {
return 0;
+ }
return dexGetParameterAnnotationSetRefList(pDexFile, pItem)->size;
}
DEX_INLINE const DexAnnotationItem* dexGetAnnotationItem(
const DexFile* pDexFile, const DexAnnotationSetItem* pAnnoSet, u4 idx)
{
- return (const DexAnnotationItem*)
- (pDexFile->baseAddr + dexGetAnnotationOff(pAnnoSet, idx));
+ u4 offset = dexGetAnnotationOff(pAnnoSet, idx);
+ if (offset == 0) {
+ return NULL;
+ }
+ return (const DexAnnotationItem*) (pDexFile->baseAddr + offset);
}
/*
*/
PrimitiveType dexGetPrimitiveTypeFromDescriptorChar(char descriptorChar);
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*_LIBDEX_DEXFILE*/
+#endif // LIBDEX_DEXFILE_H_
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