diff options
Diffstat (limited to 'src/plugins/HookSystem.cpp')
| -rw-r--r-- | src/plugins/HookSystem.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/plugins/HookSystem.cpp b/src/plugins/HookSystem.cpp index e6bd354b..97469e02 100644 --- a/src/plugins/HookSystem.cpp +++ b/src/plugins/HookSystem.cpp @@ -45,6 +45,10 @@ size_t CFunctionHook::getInstructionLenAt(void* start) { // I don't have an assembler. I don't think udis provides one. Besides, variables might be tricky. if (((uint8_t*)start)[0] == 0xFF && ((uint8_t*)start)[1] == 0x15) m_vTrampolineRIPUses.emplace_back(std::make_pair<>((uint64_t)start - (uint64_t)m_pSource, ins)); + else { + Debug::log(ERR, "[CFunctionHook] Cannot hook: unsupported %rip usage: {}", ins); + throw std::runtime_error("unsupported %rip usage"); + } } return insSize; @@ -90,7 +94,10 @@ bool CFunctionHook::hook() { static constexpr size_t CALL_WITH_RAX_ADDRESS_OFFSET = 2; // get minimum size to overwrite - const auto HOOKSIZE = probeMinimumJumpSize(m_pSource, sizeof(ABSOLUTE_JMP_ADDRESS) + sizeof(PUSH_RAX) + sizeof(POP_RAX)); + size_t HOOKSIZE = 0; + try { + HOOKSIZE = probeMinimumJumpSize(m_pSource, sizeof(ABSOLUTE_JMP_ADDRESS) + sizeof(PUSH_RAX) + sizeof(POP_RAX)); + } catch (std::exception& e) { return false; } // alloc trampoline const auto TRAMPOLINE_SIZE = sizeof(ABSOLUTE_JMP_ADDRESS) + HOOKSIZE + sizeof(PUSH_RAX) + m_vTrampolineRIPUses.size() * (sizeof(CALL_WITH_RAX) - 6); |