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comparison: security/sandbox/win/src/resolver_64.cc
security/sandbox/win/src/resolver_64.cc
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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/resolver.h" | |
| 6 | |
| 7 #include "sandbox/win/src/sandbox_nt_util.h" | |
| 8 | |
| 9 namespace { | |
| 10 | |
| 11 const BYTE kPushRax = 0x50; | |
| 12 const USHORT kMovRax = 0xB848; | |
| 13 const ULONG kMovRspRax = 0x24048948; | |
| 14 const BYTE kRetNp = 0xC3; | |
| 15 | |
| 16 #pragma pack(push, 1) | |
| 17 struct InternalThunk { | |
| 18 // This struct contains roughly the following code: | |
| 19 // 00 50 push rax | |
| 20 // 01 48b8f0debc9a78563412 mov rax,123456789ABCDEF0h | |
| 21 // 0b 48890424 mov qword ptr [rsp],rax | |
| 22 // 0f c3 ret | |
| 23 // | |
| 24 // The code modifies rax, but that should not be an issue for the common | |
| 25 // calling conventions. | |
| 26 | |
| 27 InternalThunk() { | |
| 28 push_rax = kPushRax; | |
| 29 mov_rax = kMovRax; | |
| 30 interceptor_function = 0; | |
| 31 mov_rsp_rax = kMovRspRax; | |
| 32 ret = kRetNp; | |
| 33 }; | |
| 34 BYTE push_rax; // = 50 | |
| 35 USHORT mov_rax; // = 48 B8 | |
| 36 ULONG_PTR interceptor_function; | |
| 37 ULONG mov_rsp_rax; // = 48 89 04 24 | |
| 38 BYTE ret; // = C3 | |
| 39 }; | |
| 40 #pragma pack(pop) | |
| 41 | |
| 42 } // namespace. | |
| 43 | |
| 44 namespace sandbox { | |
| 45 | |
| 46 size_t ResolverThunk::GetInternalThunkSize() const { | |
| 47 return sizeof(InternalThunk); | |
| 48 } | |
| 49 | |
| 50 bool ResolverThunk::SetInternalThunk(void* storage, size_t storage_bytes, | |
| 51 const void* original_function, | |
| 52 const void* interceptor) { | |
| 53 if (storage_bytes < sizeof(InternalThunk)) | |
| 54 return false; | |
| 55 | |
| 56 InternalThunk* thunk = new(storage, NT_PLACE) InternalThunk; | |
| 57 thunk->interceptor_function = reinterpret_cast<ULONG_PTR>(interceptor); | |
| 58 | |
| 59 return true; | |
| 60 } | |
| 61 | |
| 62 NTSTATUS ResolverThunk::ResolveTarget(const void* module, | |
| 63 const char* function_name, | |
| 64 void** address) { | |
| 65 // We don't support sidestep & co. | |
| 66 return STATUS_NOT_IMPLEMENTED; | |
| 67 } | |
| 68 | |
| 69 } // namespace sandbox |
