crazy_linker_shared_library.cpp revision f8ee788a64d60abd8f2d742a5fdedde054ecd910
1f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 2f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// found in the LICENSE file. 4f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 5f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_shared_library.h" 6f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 7f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include <dlfcn.h> 8f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include <stdlib.h> 9f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include <sys/mman.h> 10f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include <elf.h> 11f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 12f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_ashmem.h" 13f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_debug.h" 14f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_elf_loader.h" 15f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_elf_relocations.h" 16f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_library_list.h" 17f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_library_view.h" 18f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_globals.h" 19f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_memory_mapping.h" 20f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_thread.h" 21f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_util.h" 22f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "crazy_linker_wrappers.h" 23f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "linker_phdr.h" 24f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 25f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DF_SYMBOLIC 26f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DF_SYMBOLIC 2 27f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 28f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 29f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DF_TEXTREL 30f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DF_TEXTREL 4 31f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 32f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 33f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DT_INIT_ARRAY 34f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DT_INIT_ARRAY 25 35f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 36f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 37f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DT_INIT_ARRAYSZ 38f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DT_INIT_ARRAYSZ 27 39f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 40f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 41f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DT_FINI_ARRAY 42f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DT_FINI_ARRAY 26 43f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 44f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 45f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DT_FINI_ARRAYSZ 46f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DT_FINI_ARRAYSZ 28 47f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 48f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 49f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DT_FLAGS 50f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DT_FLAGS 30 51f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 52f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 53f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DT_PREINIT_ARRAY 54f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DT_PREINIT_ARRAY 32 55f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 56f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 57f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifndef DT_PREINIT_ARRAYSZ 58f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#define DT_PREINIT_ARRAYSZ 33 59f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 60f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 61f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)namespace crazy { 62f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 63f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)namespace { 64f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 65f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)typedef SharedLibrary::linker_function_t linker_function_t; 66f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)typedef int (*JNI_OnLoadFunctionPtr)(void* vm, void* reserved); 67f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)typedef void (*JNI_OnUnloadFunctionPtr)(void* vm, void* reserved); 68f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 69f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// Call a constructor or destructor function pointer. Ignore 70f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// NULL and -1 values intentionally. They correspond to markers 71f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// in the tables, or deleted values. 72f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// |func_type| corresponds to the type of the function, and is only 73f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// used for debugging (examples are "DT_INIT", "DT_INIT_ARRAY", etc...). 74f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)void CallFunction(linker_function_t func, const char* func_type) { 75f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) uintptr_t func_address = reinterpret_cast<uintptr_t>(func); 76f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 77f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: %p %s\n", __FUNCTION__, func, func_type); 78f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (func_address != 0 && func_address != uintptr_t(-1)) 79f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) func(); 80f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 81f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 82f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// An instance of ElfRelocator::SymbolResolver that can be used 83f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// to resolve symbols in a shared library being loaded by 84f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// LibraryList::LoadLibrary. 85f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)class SharedLibraryResolver : public ElfRelocations::SymbolResolver { 86f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) public: 87f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) SharedLibraryResolver(SharedLibrary* lib, 88f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LibraryList* lib_list, 89f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) Vector<LibraryView*>* dependencies) 90f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) : lib_(lib), dependencies_(dependencies) {} 91f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 92f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) virtual void* Lookup(const char* symbol_name) { 93f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // TODO(digit): Add the ability to lookup inside the main executable. 94f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 95f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // First, look inside the current library. 96f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) const ELF::Sym* entry = lib_->LookupSymbolEntry(symbol_name); 97f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (entry) 98f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return reinterpret_cast<void*>(lib_->load_bias() + entry->st_value); 99f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 100f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Special case: redirect the dynamic linker symbols to our wrappers. 101f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // This ensures that loaded libraries can call dlopen() / dlsym() 102f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // and transparently use the crazy linker to perform their duty. 103f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) void* address = WrapLinkerSymbol(symbol_name); 104f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (address) 105f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return address; 106f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 107f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Then look inside the dependencies. 108f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) for (size_t n = 0; n < dependencies_->GetCount(); ++n) { 109f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LibraryView* wrap = (*dependencies_)[n]; 110f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // LOG("%s: Looking into dependency %p (%s)\n", __FUNCTION__, wrap, 111f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // wrap->GetName()); 112f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (wrap->IsSystem()) { 113f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) address = ::dlsym(wrap->GetSystem(), symbol_name); 114f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifdef __arm__ 115f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Android libm.so defines isnanf as weak. This means that its 116f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // address cannot be found by dlsym(), which always returns NULL 117f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // for weak symbols. However, libm.so contains the real isnanf 118f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // as __isnanf. If we encounter isnanf and fail to resolve it in 119f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // libm.so, retry with __isnanf. 120f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // 121f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // This occurs only in clang, which lacks __builtin_isnanf. The 122f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // gcc compiler implements isnanf as a builtin, so the symbol 123f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // isnanf never need be resolved in gcc builds. 124f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // 125f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // http://code.google.com/p/chromium/issues/detail?id=376828 126f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!address && 127f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) !strcmp(symbol_name, "isnanf") && 128f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) !strcmp(wrap->GetName(), "libm.so")) 129f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) address = ::dlsym(wrap->GetSystem(), "__isnanf"); 130f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 131f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (address) 132f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return address; 133f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 134f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (wrap->IsCrazy()) { 135f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) SharedLibrary* dep = wrap->GetCrazy(); 136f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) entry = dep->LookupSymbolEntry(symbol_name); 137f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (entry) 138f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return reinterpret_cast<void*>(dep->load_bias() + entry->st_value); 139f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 140f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 141f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 142f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Nothing found here. 143f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return NULL; 144f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 145f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 146f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) private: 147f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) SharedLibrary* lib_; 148f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) Vector<LibraryView*>* dependencies_; 149f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)}; 150f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 151f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} // namespace 152f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 153f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)SharedLibrary::SharedLibrary() { ::memset(this, 0, sizeof(*this)); } 154f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 155f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)SharedLibrary::~SharedLibrary() { 156f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Ensure the library is unmapped on destruction. 157f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (view_.load_address()) 158f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) munmap(reinterpret_cast<void*>(view_.load_address()), view_.load_size()); 159f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 160f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 161f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)bool SharedLibrary::Load(const char* full_path, 162f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) size_t load_address, 163f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) size_t file_offset, 164f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) Error* error) { 165f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // First, record the path. 166f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: full path '%s'\n", __FUNCTION__, full_path); 167f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 168f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) size_t full_path_len = strlen(full_path); 169f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (full_path_len >= sizeof(full_path_)) { 170f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) error->Format("Path too long: %s", full_path); 171f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 172f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 173f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 174f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) strlcpy(full_path_, full_path, sizeof(full_path_)); 175f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) base_name_ = GetBaseNamePtr(full_path_); 176f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 177f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Load the ELF binary in memory. 178f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: Loading ELF segments for %s\n", __FUNCTION__, base_name_); 179f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 180f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) { 181f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) ElfLoader loader; 182f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!loader.LoadAt(full_path_, file_offset, load_address, error)) { 183f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 184f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 185f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 186f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!view_.InitUnmapped(loader.load_start(), 187f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) loader.loaded_phdr(), 188f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) loader.phdr_count(), 189f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) error)) { 190f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 191f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 192f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 193f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!symbols_.Init(&view_)) { 194f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) *error = "Missing or malformed symbol table"; 195f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 196f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 197f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 198f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 199f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (phdr_table_get_relro_info(view_.phdr(), 200f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) view_.phdr_count(), 201f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) view_.load_bias(), 202f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) &relro_start_, 203f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) &relro_size_) < 0) { 204f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) relro_start_ = 0; 205f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) relro_size_ = 0; 206f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 207f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 208f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#ifdef __arm__ 209f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: Extracting ARM.exidx table for %s\n", __FUNCTION__, base_name_); 210f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) (void)phdr_table_get_arm_exidx( 211f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) phdr(), phdr_count(), load_bias(), &arm_exidx_, &arm_exidx_count_); 212f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 213f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 214f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: Parsing dynamic table for %s\n", __FUNCTION__, base_name_); 215f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) ElfView::DynamicIterator dyn(&view_); 216f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) for (; dyn.HasNext(); dyn.GetNext()) { 217f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) ELF::Addr dyn_value = dyn.GetValue(); 218f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) uintptr_t dyn_addr = dyn.GetAddress(load_bias()); 219f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) switch (dyn.GetTag()) { 220f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_DEBUG: 221f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (view_.dynamic_flags() & PF_W) { 222f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) *dyn.GetValuePointer() = 223f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) reinterpret_cast<uintptr_t>(Globals::GetRDebug()->GetAddress()); 224f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 225f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 226f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_INIT: 227f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_INIT addr=%p\n", dyn_addr); 228f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) init_func_ = reinterpret_cast<linker_function_t>(dyn_addr); 229f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 230f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_FINI: 231f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_FINI addr=%p\n", dyn_addr); 232f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) fini_func_ = reinterpret_cast<linker_function_t>(dyn_addr); 233f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 234f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_INIT_ARRAY: 235f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_INIT_ARRAY addr=%p\n", dyn_addr); 236f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) init_array_ = reinterpret_cast<linker_function_t*>(dyn_addr); 237f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 238f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_INIT_ARRAYSZ: 239f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) init_array_count_ = dyn_value / sizeof(ELF::Addr); 240f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_INIT_ARRAYSZ value=%p count=%p\n", 241f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) dyn_value, 242f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) init_array_count_); 243f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 244f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_FINI_ARRAY: 245f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_FINI_ARRAY addr=%p\n", dyn_addr); 246f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) fini_array_ = reinterpret_cast<linker_function_t*>(dyn_addr); 247f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 248f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_FINI_ARRAYSZ: 249f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) fini_array_count_ = dyn_value / sizeof(ELF::Addr); 250f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_FINI_ARRAYSZ value=%p count=%p\n", 251f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) dyn_value, 252f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) fini_array_count_); 253f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 254f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_PREINIT_ARRAY: 255f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_PREINIT_ARRAY addr=%p\n", dyn_addr); 256f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) preinit_array_ = reinterpret_cast<linker_function_t*>(dyn_addr); 257f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 258f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_PREINIT_ARRAYSZ: 259f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) preinit_array_count_ = dyn_value / sizeof(ELF::Addr); 260f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_PREINIT_ARRAYSZ value=%p count=%p\n", 261f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) dyn_value, 262f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) preinit_array_count_); 263f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 264f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_SYMBOLIC: 265f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG(" DT_SYMBOLIC\n"); 266f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) has_DT_SYMBOLIC_ = true; 267f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 268f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_FLAGS: 269f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (dyn_value & DF_SYMBOLIC) 270f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) has_DT_SYMBOLIC_ = true; 271f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 272f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#if defined(__mips__) 273f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) case DT_MIPS_RLD_MAP: 274f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) *dyn.GetValuePointer() = 275f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) reinterpret_cast<ELF::Addr>(Globals::GetRDebug()->GetAddress()); 276f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) break; 277f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 278f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) default: 279f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) ; 280f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 281f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 282f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 283f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: Load complete for %s\n", __FUNCTION__, base_name_); 284f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 285f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 286f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 287f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)bool SharedLibrary::Relocate(LibraryList* lib_list, 288f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) Vector<LibraryView*>* dependencies, 289f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) Error* error) { 290f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Apply relocations. 291f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: Applying relocations to %s\n", __FUNCTION__, base_name_); 292f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 293f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) ElfRelocations relocations; 294f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 295f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!relocations.Init(&view_, error)) 296f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 297f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 298f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) SharedLibraryResolver resolver(this, lib_list, dependencies); 299f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!relocations.ApplyAll(&symbols_, &resolver, error)) 300f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 301f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 302f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: Relocations applied for %s\n", __FUNCTION__, base_name_); 303f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 304f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 305f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 306f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)const ELF::Sym* SharedLibrary::LookupSymbolEntry(const char* symbol_name) { 307f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return symbols_.LookupByName(symbol_name); 308f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 309f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 310f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)void* SharedLibrary::FindAddressForSymbol(const char* symbol_name) { 311f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return symbols_.LookupAddressByName(symbol_name, view_.load_bias()); 312f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 313f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 314f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)bool SharedLibrary::CreateSharedRelro(size_t load_address, 315f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) size_t* relro_start, 316f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) size_t* relro_size, 317f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) int* relro_fd, 318f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) Error* error) { 319f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) SharedRelro relro; 320f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 321f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!relro.Allocate(relro_size_, base_name_, error)) 322f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 323f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 324f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (load_address != 0 && load_address != this->load_address()) { 325f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Need to relocate the content of the ashmem region first to accomodate 326f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // for the new load address. 327f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!relro.CopyFromRelocated( 328f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) &view_, load_address, relro_start_, relro_size_, error)) 329f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 330f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } else { 331f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Simply copy, no relocations. 332f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!relro.CopyFrom(relro_start_, relro_size_, error)) 333f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 334f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 335f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 336f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Enforce read-only mode for the region's content. 337f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!relro.ForceReadOnly(error)) 338f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 339f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 340f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // All good. 341f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) *relro_start = relro.start(); 342f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) *relro_size = relro.size(); 343f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) *relro_fd = relro.DetachFd(); 344f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 345f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 346f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 347f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)bool SharedLibrary::UseSharedRelro(size_t relro_start, 348f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) size_t relro_size, 349f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) int relro_fd, 350f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) Error* error) { 351f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) LOG("%s: relro_start=%p relro_size=%p relro_fd=%d\n", 352f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) __FUNCTION__, 353f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) (void*)relro_start, 354f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) (void*)relro_size, 355f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) relro_fd); 356f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 357f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (relro_fd < 0 || relro_size == 0) { 358f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Nothing to do here. 359f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 360f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 361f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 362f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Sanity check: A shared RELRO is not already used. 363f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (relro_used_) { 364f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) *error = "Library already using shared RELRO section"; 365f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 366f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 367f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 368f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Sanity check: RELRO addresses must match. 369f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (relro_start_ != relro_start || relro_size_ != relro_size) { 370f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) error->Format("RELRO mismatch addr=%p size=%p (wanted addr=%p size=%p)", 371f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) relro_start_, 372f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) relro_size_, 373f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) relro_start, 374f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) relro_size); 375f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 376f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 377f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 378f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Everything's good, swap pages in this process's address space. 379f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) SharedRelro relro; 380f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!relro.InitFrom(relro_start, relro_size, relro_fd, error)) 381f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 382f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 383f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) relro_used_ = true; 384f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 385f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 386f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 387f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)void SharedLibrary::CallConstructors() { 388f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) CallFunction(init_func_, "DT_INIT"); 389f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) for (size_t n = 0; n < init_array_count_; ++n) 390f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) CallFunction(init_array_[n], "DT_INIT_ARRAY"); 391f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 392f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 393f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)void SharedLibrary::CallDestructors() { 394f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) for (size_t n = fini_array_count_; n > 0; --n) { 395f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) CallFunction(fini_array_[n - 1], "DT_FINI_ARRAY"); 396f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 397f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) CallFunction(fini_func_, "DT_FINI"); 398f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 399f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 400f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)bool SharedLibrary::SetJavaVM(void* java_vm, 401f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) int minimum_jni_version, 402f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) Error* error) { 403f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (java_vm == NULL) 404f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 405f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 406f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Lookup for JNI_OnLoad, exit if it doesn't exist. 407f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) JNI_OnLoadFunctionPtr jni_onload = reinterpret_cast<JNI_OnLoadFunctionPtr>( 408f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) FindAddressForSymbol("JNI_OnLoad")); 409f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!jni_onload) 410f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 411f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 412f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) int jni_version = (*jni_onload)(java_vm, NULL); 413f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (jni_version < minimum_jni_version) { 414f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) error->Format("JNI_OnLoad() in %s returned %d, expected at least %d", 415f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) full_path_, 416f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) jni_version, 417f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) minimum_jni_version); 418f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 419f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 420f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 421f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Save the JavaVM handle for unload time. 422f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) java_vm_ = java_vm; 423f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 424f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 425f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 426f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)void SharedLibrary::CallJniOnUnload() { 427f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (!java_vm_) 428f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return; 429f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 430f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) JNI_OnUnloadFunctionPtr jni_on_unload = 431f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) reinterpret_cast<JNI_OnUnloadFunctionPtr>( 432f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) this->FindAddressForSymbol("JNI_OnUnload")); 433f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 434f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (jni_on_unload) 435f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) (*jni_on_unload)(java_vm_, NULL); 436f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 437f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 438f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)bool SharedLibrary::DependencyIterator::GetNext() { 439f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) dep_name_ = NULL; 440f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) for (; iter_.HasNext(); iter_.GetNext()) { 441f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) if (iter_.GetTag() == DT_NEEDED) { 442f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) dep_name_ = symbols_->GetStringById(iter_.GetValue()); 443f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) iter_.GetNext(); 444f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return true; 445f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 446f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 447f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return false; 448f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} 449f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 450f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)} // namespace crazy 451