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| 1 // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "sandbox/win/src/eat_resolver.h" | |
| 6 | |
| 7 #include <stddef.h> | |
| 8 | |
| 9 #include "base/win/pe_image.h" | |
| 10 #include "sandbox/win/src/sandbox_nt_util.h" | |
| 11 | |
| 12 namespace sandbox { | |
| 13 | |
| 14 NTSTATUS EatResolverThunk::Setup(const void* target_module, | |
| 15 const void* interceptor_module, | |
| 16 const char* target_name, | |
| 17 const char* interceptor_name, | |
| 18 const void* interceptor_entry_point, | |
| 19 void* thunk_storage, | |
| 20 size_t storage_bytes, | |
| 21 size_t* storage_used) { | |
| 22 NTSTATUS ret = Init(target_module, interceptor_module, target_name, | |
| 23 interceptor_name, interceptor_entry_point, | |
| 24 thunk_storage, storage_bytes); | |
| 25 if (!NT_SUCCESS(ret)) | |
| 26 return ret; | |
| 27 | |
| 28 if (!eat_entry_) | |
| 29 return STATUS_INVALID_PARAMETER; | |
| 30 | |
| 31 #if defined(_WIN64) | |
| 32 // We have two thunks, in order: the return path and the forward path. | |
| 33 if (!SetInternalThunk(thunk_storage, storage_bytes, NULL, target_)) | |
| 34 return STATUS_BUFFER_TOO_SMALL; | |
| 35 | |
| 36 size_t thunk_bytes = GetInternalThunkSize(); | |
| 37 storage_bytes -= thunk_bytes; | |
| 38 thunk_storage = reinterpret_cast<char*>(thunk_storage) + thunk_bytes; | |
| 39 #endif | |
| 40 | |
| 41 if (!SetInternalThunk(thunk_storage, storage_bytes, target_, interceptor_)) | |
| 42 return STATUS_BUFFER_TOO_SMALL; | |
| 43 | |
| 44 AutoProtectMemory memory; | |
| 45 ret = memory.ChangeProtection(eat_entry_, sizeof(DWORD), PAGE_READWRITE); | |
| 46 if (!NT_SUCCESS(ret)) | |
| 47 return ret; | |
| 48 | |
| 49 // Perform the patch. | |
| 50 *eat_entry_ = static_cast<DWORD>(reinterpret_cast<uintptr_t>(thunk_storage)) - | |
| 51 static_cast<DWORD>(reinterpret_cast<uintptr_t>(target_module)); | |
| 52 | |
| 53 if (NULL != storage_used) | |
| 54 *storage_used = GetThunkSize(); | |
| 55 | |
| 56 return ret; | |
| 57 } | |
| 58 | |
| 59 NTSTATUS EatResolverThunk::ResolveTarget(const void* module, | |
| 60 const char* function_name, | |
| 61 void** address) { | |
| 62 DCHECK_NT(address); | |
| 63 if (!module) | |
| 64 return STATUS_INVALID_PARAMETER; | |
| 65 | |
| 66 base::win::PEImage pe(module); | |
| 67 if (!pe.VerifyMagic()) | |
| 68 return STATUS_INVALID_IMAGE_FORMAT; | |
| 69 | |
| 70 eat_entry_ = pe.GetExportEntry(function_name); | |
| 71 | |
| 72 if (!eat_entry_) | |
| 73 return STATUS_PROCEDURE_NOT_FOUND; | |
| 74 | |
| 75 *address = pe.RVAToAddr(*eat_entry_); | |
| 76 | |
| 77 return STATUS_SUCCESS; | |
| 78 } | |
| 79 | |
| 80 size_t EatResolverThunk::GetThunkSize() const { | |
| 81 #if defined(_WIN64) | |
| 82 return GetInternalThunkSize() * 2; | |
| 83 #else | |
| 84 return GetInternalThunkSize(); | |
| 85 #endif | |
| 86 } | |
| 87 | |
| 88 } // namespace sandbox | |
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Chromium Code Reviews
Issue 1851213002:
Remove sandbox on Windows. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master