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MerijnandClaude Opus 5.5
b86370285b
Once an image has .ehmeta, an eh_frame_hdr version other than 1, an eh_frame_ptr encoding other than absptr or pcrel, a 64-bit record length, an eh_frame_ptr outside the image or a missing terminator now throw instead of returning the empty answer. The test queries a fixture DLL whose .ehmeta it can break, since the unwinder reads the same section. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
20 lines
807 B
C++
20 lines
807 B
C++
#include "tests/GuestUnwindModuleInfoFixture.hpp"
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#include <cstdint>
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#include <windows.h>
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__attribute__((section(".ehmeta"), used)) static volatile std::uint32_t ehMeta = 0;
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extern "C" IMAGE_DOS_HEADER __ImageBase;
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static UnwindFixture fixture;
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extern "C" __declspec(dllexport) UnwindFixture* GetUnwindFixture() {
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const auto base = reinterpret_cast<std::uint64_t>(&__ImageBase);
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fixture.header.frames = static_cast<std::int32_t>(reinterpret_cast<std::intptr_t>(&fixture.frames) - reinterpret_cast<std::intptr_t>(&fixture.header.frames));
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DWORD old = 0;
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if (!VirtualProtect(const_cast<std::uint32_t*>(&ehMeta), sizeof(ehMeta), PAGE_READWRITE, &old)) return nullptr;
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ehMeta = static_cast<std::uint32_t>(reinterpret_cast<std::uint64_t>(&fixture.header) - base);
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return &fixture;
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}
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