1 /* 2 * Copyright 2011, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "librsloader.h" 18 19 #include "ELFObject.h" 20 #include "ELFSectionSymTab.h" 21 #include "ELFSymbol.h" 22 23 #include "utils/serialize.h" 24 25 #define LOG_TAG "bcc" 26 #include "cutils/log.h" 27 28 #include <llvm/ADT/OwningPtr.h> 29 30 static inline RSExecRef wrap(ELFObject<32> *object) { 31 return reinterpret_cast<RSExecRef>(object); 32 } 33 34 static inline ELFObject<32> *unwrap(RSExecRef object) { 35 return reinterpret_cast<ELFObject<32> *>(object); 36 } 37 38 extern "C" RSExecRef 39 rsloaderCreateExec(unsigned char const *buf, 40 size_t buf_size, 41 void *(*find_symbol)(void *, char const *), 42 void *find_symbol_context) { 43 44 ArchiveReaderLE AR(buf, buf_size); 45 46 llvm::OwningPtr<ELFObject<32> > object(ELFObject<32>::read(AR)); 47 if (!object) { 48 LOGE("Unable to load the ELF object."); 49 return NULL; 50 } 51 52 //object->print(); 53 object->relocate(find_symbol, find_symbol_context); 54 55 return wrap(object.take()); 56 } 57 58 extern "C" void rsloaderDisposeExec(RSExecRef object) { 59 delete unwrap(object); 60 } 61 62 extern "C" void *rsloaderGetSymbolAddress(RSExecRef object_, 63 char const *name) { 64 ELFObject<32> *object = unwrap(object_); 65 66 ELFSectionSymTab<32> *symtab = 67 static_cast<ELFSectionSymTab<32> *>(object->getSectionByName(".symtab")); 68 69 if (!symtab) { 70 return NULL; 71 } 72 73 ELFSymbol<32> *symbol = symtab->getByName(name); 74 75 if (!symbol) { 76 LOGE("Symbol not found: %s\n", name); 77 return NULL; 78 } 79 80 return symbol->getAddress(false); 81 } 82 83 extern "C" size_t rsloaderGetSymbolSize(RSExecRef object_, char const *name) { 84 ELFObject<32> *object = unwrap(object_); 85 86 ELFSectionSymTab<32> *symtab = 87 static_cast<ELFSectionSymTab<32> *>(object->getSectionByName(".symtab")); 88 89 if (!symtab) { 90 return NULL; 91 } 92 93 ELFSymbol<32> *symbol = symtab->getByName(name); 94 95 if (!symbol) { 96 LOGE("Symbol not found: %s\n", name); 97 return NULL; 98 } 99 100 return (size_t)symbol->getSize(); 101 } 102 103 extern "C" size_t rsloaderGetFuncCount(RSExecRef object) { 104 ELFSectionSymTab<32> *symtab = static_cast<ELFSectionSymTab<32> *>( 105 unwrap(object)->getSectionByName(".symtab")); 106 107 if (!symtab) { 108 return 0; 109 } 110 111 return symtab->getFuncCount(); 112 } 113 114 extern "C" void rsloaderGetFuncNameList(RSExecRef object, 115 size_t size, 116 char const **list) { 117 ELFSectionSymTab<32> *symtab = static_cast<ELFSectionSymTab<32> *>( 118 unwrap(object)->getSectionByName(".symtab")); 119 120 if (symtab) { 121 symtab->getFuncNameList(size, list); 122 } 123 } 124
