asm-constants.h revision 2ad60cfc28e14ee8f0bb038720836a4696c478ad
1/* 2 * Copyright 2008 The Android Open Source Project 3 * 4 * Constants used by the assembler and verified by the C compiler. 5 */ 6 7#if defined(ASM_DEF_VERIFY) 8 /* 9 * Generate C fragments that verify values; assumes "bool failed" exists. 10 * These are all constant expressions, so on success these will compile 11 * down to nothing. 12 */ 13# define MTERP_OFFSET(_name, _type, _field, _offset) \ 14 if (offsetof(_type, _field) != _offset) { \ 15 LOGE("Bad asm offset %s (%d), should be %d\n", \ 16 #_name, _offset, offsetof(_type, _field)); \ 17 failed = true; \ 18 } 19# define MTERP_SIZEOF(_name, _type, _size) \ 20 if (sizeof(_type) != (_size)) { \ 21 LOGE("Bad asm sizeof %s (%d), should be %d\n", \ 22 #_name, (_size), sizeof(_type)); \ 23 failed = true; \ 24 } 25# define MTERP_CONSTANT(_name, _value) \ 26 if ((_name) != (_value)) { \ 27 LOGE("Bad asm constant %s (%d), should be %d\n", \ 28 #_name, (_value), (_name)); \ 29 failed = true; \ 30 } 31#else 32 /* generate constant labels for the assembly output */ 33# define MTERP_OFFSET(name, type, field, offset) name = offset 34# define MTERP_SIZEOF(name, type, size) name = size 35# define MTERP_CONSTANT(name, value) name = value 36#endif 37 38/* 39 * Platform dependencies. Some platforms require 64-bit alignment of 64-bit 40 * data structures. Some versions of gcc will hold small enumerated types 41 * in a char instead of an int. 42 */ 43#if defined(__ARM_EABI__) 44# define MTERP_NO_UNALIGN_64 45#endif 46#if defined(__ARM_EABI__) // TODO: should be gcc version? 47# define MTERP_SMALL_ENUM 1 48#else 49# define MTERP_SMALL_ENUM 4 50#endif 51 52/* 53 * This file must only contain the following kinds of statements: 54 * 55 * MTERP_OFFSET(name, StructType, fieldname, offset) 56 * 57 * Declares that the expected offset of StructType.fieldname is "offset". 58 * This will break whenever the contents of StructType are rearranged. 59 * 60 * MTERP_SIZEOF(name, Type, size) 61 * 62 * Declares that the expected size of Type is "size". 63 * 64 * MTERP_CONSTANT(name, value) 65 * 66 * Declares that the expected value of "name" is "value". Useful for 67 * enumerations and defined constants that are inaccessible to the 68 * assembly source. (Note this assumes you will use the same name in 69 * both C and assembly, which is good practice.) 70 * 71 * In all cases the "name" field is the label you will use in the assembler. 72 * 73 * The "value" field must always be an actual number, not a symbol, unless 74 * you are sure that the symbol's value will be visible to both C and 75 * assembly sources. There may be restrictions on the possible range of 76 * values (which are usually provided as immediate operands), so it's best 77 * to restrict numbers assuming a signed 8-bit field. 78 * 79 * On the assembly side, these just become "name=value" constants. On the 80 * C side, these turn into assertions that cause the VM to abort if the 81 * values are incorrect. 82 */ 83 84/* globals (sanity check for LDR vs LDRB) */ 85MTERP_SIZEOF(sizeofGlobal_debuggerActive, gDvm.debuggerActive, MTERP_SMALL_ENUM) 86#if defined(WITH_PROFILER) 87MTERP_SIZEOF(sizeofGlobal_activeProfilers, gDvm.activeProfilers, 4) 88#endif 89 90/* MterpGlue fields */ 91MTERP_OFFSET(offGlue_pc, MterpGlue, pc, 0) 92MTERP_OFFSET(offGlue_fp, MterpGlue, fp, 4) 93MTERP_OFFSET(offGlue_retval, MterpGlue, retval, 8) 94MTERP_OFFSET(offGlue_method, MterpGlue, method, 16) 95MTERP_OFFSET(offGlue_methodClassDex, MterpGlue, methodClassDex, 20) 96MTERP_OFFSET(offGlue_self, MterpGlue, self, 24) 97MTERP_OFFSET(offGlue_bailPtr, MterpGlue, bailPtr, 28) 98MTERP_OFFSET(offGlue_interpStackEnd, MterpGlue, interpStackEnd, 32) 99MTERP_OFFSET(offGlue_pSelfSuspendCount, MterpGlue, pSelfSuspendCount, 36) 100#if defined(WITH_DEBUGGER) && defined(WITH_PROFILER) 101MTERP_OFFSET(offGlue_pDebuggerActive, MterpGlue, pDebuggerActive, 40) 102MTERP_OFFSET(offGlue_pActiveProfilers, MterpGlue, pActiveProfilers, 44) 103MTERP_OFFSET(offGlue_entryPoint, MterpGlue, entryPoint, 48) 104#elif defined(WITH_DEBUGGER) 105MTERP_OFFSET(offGlue_pDebuggerActive, MterpGlue, pDebuggerActive, 40) 106MTERP_OFFSET(offGlue_entryPoint, MterpGlue, entryPoint, 44) 107#elif defined(WITH_PROFILER) 108MTERP_OFFSET(offGlue_pActiveProfilers, MterpGlue, pActiveProfilers, 40) 109MTERP_OFFSET(offGlue_entryPoint, MterpGlue, entryPoint, 44) 110#else 111MTERP_OFFSET(offGlue_entryPoint, MterpGlue, entryPoint, 40) 112#endif 113/* make sure all JValue union members are stored at the same offset */ 114MTERP_OFFSET(offGlue_retval_z, MterpGlue, retval.z, 8) 115MTERP_OFFSET(offGlue_retval_i, MterpGlue, retval.i, 8) 116MTERP_OFFSET(offGlue_retval_j, MterpGlue, retval.j, 8) 117MTERP_OFFSET(offGlue_retval_l, MterpGlue, retval.l, 8) 118 119/* DvmDex fields */ 120MTERP_OFFSET(offDvmDex_pResStrings, DvmDex, pResStrings, 8) 121MTERP_OFFSET(offDvmDex_pResClasses, DvmDex, pResClasses, 12) 122MTERP_OFFSET(offDvmDex_pResMethods, DvmDex, pResMethods, 16) 123MTERP_OFFSET(offDvmDex_pResFields, DvmDex, pResFields, 20) 124MTERP_OFFSET(offDvmDex_pInterfaceCache, DvmDex, pInterfaceCache, 24) 125 126/* StackSaveArea fields */ 127#ifdef EASY_GDB 128MTERP_OFFSET(offStackSaveArea_prevSave, StackSaveArea, prevSave, 0) 129MTERP_OFFSET(offStackSaveArea_prevFrame, StackSaveArea, prevFrame, 4) 130MTERP_OFFSET(offStackSaveArea_savedPc, StackSaveArea, savedPc, 8) 131MTERP_OFFSET(offStackSaveArea_method, StackSaveArea, method, 12) 132MTERP_OFFSET(offStackSaveArea_currentPc, StackSaveArea, xtra.currentPc, 16) 133MTERP_OFFSET(offStackSaveArea_localRefTop, StackSaveArea, xtra.localRefTop, 16) 134MTERP_SIZEOF(sizeofStackSaveArea, StackSaveArea, 20) 135#else 136MTERP_OFFSET(offStackSaveArea_prevFrame, StackSaveArea, prevFrame, 0) 137MTERP_OFFSET(offStackSaveArea_savedPc, StackSaveArea, savedPc, 4) 138MTERP_OFFSET(offStackSaveArea_method, StackSaveArea, method, 8) 139MTERP_OFFSET(offStackSaveArea_currentPc, StackSaveArea, xtra.currentPc, 12) 140MTERP_OFFSET(offStackSaveArea_localRefTop, StackSaveArea, xtra.localRefTop, 12) 141MTERP_SIZEOF(sizeofStackSaveArea, StackSaveArea, 16) 142#endif 143 144/* InstField fields */ 145#ifdef PROFILE_FIELD_ACCESS 146MTERP_OFFSET(offInstField_byteOffset, InstField, byteOffset, 24) 147#else 148MTERP_OFFSET(offInstField_byteOffset, InstField, byteOffset, 16) 149#endif 150 151/* StaticField fields */ 152#ifdef PROFILE_FIELD_ACCESS 153MTERP_OFFSET(offStaticField_value, StaticField, value, 24) 154#else 155MTERP_OFFSET(offStaticField_value, StaticField, value, 16) 156#endif 157 158/* Method fields */ 159MTERP_OFFSET(offMethod_clazz, Method, clazz, 0) 160MTERP_OFFSET(offMethod_accessFlags, Method, accessFlags, 4) 161MTERP_OFFSET(offMethod_methodIndex, Method, methodIndex, 8) 162MTERP_OFFSET(offMethod_registersSize, Method, registersSize, 10) 163MTERP_OFFSET(offMethod_outsSize, Method, outsSize, 12) 164MTERP_OFFSET(offMethod_name, Method, name, 16) 165MTERP_OFFSET(offMethod_insns, Method, insns, 32) 166MTERP_OFFSET(offMethod_nativeFunc, Method, nativeFunc, 40) 167 168/* InlineOperation fields -- code assumes "func" offset is zero, do not alter */ 169MTERP_OFFSET(offInlineOperation_func, InlineOperation, func, 0) 170 171/* Thread fields */ 172MTERP_OFFSET(offThread_stackOverflowed, Thread, stackOverflowed, 40) 173MTERP_OFFSET(offThread_curFrame, Thread, curFrame, 44) 174MTERP_OFFSET(offThread_exception, Thread, exception, 48) 175MTERP_OFFSET(offThread_jniLocal_nextEntry, \ 176 Thread, jniLocalRefTable.nextEntry, 80) 177 178/* Object fields */ 179MTERP_OFFSET(offObject_clazz, Object, clazz, 0) 180 181/* ArrayObject fields */ 182MTERP_OFFSET(offArrayObject_length, ArrayObject, length, 8) 183#ifdef MTERP_NO_UNALIGN_64 184MTERP_OFFSET(offArrayObject_contents, ArrayObject, contents, 16) 185#else 186MTERP_OFFSET(offArrayObject_contents, ArrayObject, contents, 12) 187#endif 188 189/* ClassObject fields */ 190MTERP_OFFSET(offClassObject_descriptor, ClassObject, descriptor, 24) 191MTERP_OFFSET(offClassObject_accessFlags, ClassObject, accessFlags, 32) 192MTERP_OFFSET(offClassObject_pDvmDex, ClassObject, pDvmDex, 36) 193MTERP_OFFSET(offClassObject_status, ClassObject, status, 40) 194MTERP_OFFSET(offClassObject_super, ClassObject, super, 72) 195MTERP_OFFSET(offClassObject_vtableCount, ClassObject, vtableCount, 112) 196MTERP_OFFSET(offClassObject_vtable, ClassObject, vtable, 116) 197 198/* InterpEntry enumeration */ 199MTERP_SIZEOF(sizeofClassStatus, InterpEntry, MTERP_SMALL_ENUM) 200MTERP_CONSTANT(kInterpEntryInstr, 0) 201MTERP_CONSTANT(kInterpEntryReturn, 1) 202MTERP_CONSTANT(kInterpEntryThrow, 2) 203 204/* ClassStatus enumeration */ 205MTERP_SIZEOF(sizeofClassStatus, ClassStatus, MTERP_SMALL_ENUM) 206MTERP_CONSTANT(CLASS_INITIALIZED, 7) 207 208/* MethodType enumeration */ 209MTERP_SIZEOF(sizeofMethodType, MethodType, MTERP_SMALL_ENUM) 210MTERP_CONSTANT(METHOD_DIRECT, 1) 211MTERP_CONSTANT(METHOD_STATIC, 2) 212MTERP_CONSTANT(METHOD_VIRTUAL, 3) 213MTERP_CONSTANT(METHOD_INTERFACE, 4) 214 215/* ClassObject constants */ 216MTERP_CONSTANT(ACC_PRIVATE, 0x0002) 217MTERP_CONSTANT(ACC_STATIC, 0x0008) 218MTERP_CONSTANT(ACC_NATIVE, 0x0100) 219MTERP_CONSTANT(ACC_INTERFACE, 0x0200) 220MTERP_CONSTANT(ACC_ABSTRACT, 0x0400) 221 222/* flags for dvmMalloc */ 223MTERP_CONSTANT(ALLOC_DONT_TRACK, 0x02) 224 225/* opcode number */ 226MTERP_CONSTANT(OP_MOVE_EXCEPTION, 0x0d) 227 228