| 55 | } |
| 56 | |
| 57 | bool PE::virtualizeFunction(Function function) |
| 58 | { |
| 59 | // todo: check if function can be vm'd (i.e. is sizeof(function->bytes) >= 5) |
| 60 | |
| 61 | if (!vmSection.isInitialised()) |
| 62 | vmSection.initialise(getNewSectionVirtualAddress(), getNewSectionFileOffset()); |
| 63 | |
| 64 | if (!function.disassemble()) |
| 65 | return 0; |
| 66 | |
| 67 | if (!function.compileInstructionsToVirtualInstructions()) |
| 68 | return 0; |
| 69 | |
| 70 | removeOriginalFunctionBytes(function); |
| 71 | |
| 72 | DWORD bytecodeRva = vmSection.getWritePointerRva(); |
| 73 | |
| 74 | // resolve branch instructions now we know bytecode rva |
| 75 | function.resolveBranchInstructions(bytecodeRva); |
| 76 | |
| 77 | vmSection.addBytes(function.getVirtualInstructionBytes()); |
| 78 | |
| 79 | // redirect function to a vm trampoline |
| 80 | redirectFunctionToVmTramp(function, vmSection.getWritePointerRva()); |
| 81 | vmSection.addVmTramp(bytecodeRva); |
| 82 | |
| 83 | return 1; |
| 84 | } |
| 85 | |
| 86 | bool PE::virtualizeFunctions() |
| 87 | { |
nothing calls this directly
no test coverage detected