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fix(relinker): gen r_x86_64_relative relocs for internal ptrs

This commit is contained in:
boykopovar 2026-09-08 00:15:54 +03:00
parent 8ad0a9897d
commit 789699928a
1 changed files with 28 additions and 0 deletions
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28
core/relinker/src/pipeline/RelinkerPipeline.cpp
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@ -198,6 +198,34 @@ RelinkResult RelinkerPipeline::Relink(const std::vector<std::uint8_t>& sourceElf
auto dynSection = _dynamicSectionBuilder->BuildDynamicSection(nidRefs, neededLibraries);
static constexpr std::uint32_t R_X86_64_RELATIVE = 8;
auto appendRela = [&](std::vector<std::uint8_t>& buf, std::uint64_t offset, std::uint64_t info, std::int64_t addend) {
std::size_t pos = buf.size();
buf.resize(pos + 24);
std::memcpy(buf.data() + pos, &offset, 8);
std::memcpy(buf.data() + pos + 8, &info, 8);
std::memcpy(buf.data() + pos + 16, &addend, 8);
};
auto extractRelative = [&](const FileByteOffset relaOff, const ByteCount relaSize) {
for (ByteCount off = 0; off + relaEntSize <= relaSize; off += relaEntSize) {
const FileByteOffset pos = relaOff + off;
std::uint64_t rOffset = 0, rInfo = 0;
std::int64_t rAddend = 0;
std::memcpy(&rOffset, raw.data() + pos, 8);
std::memcpy(&rInfo, raw.data() + pos + 8, 8);
std::memcpy(&rAddend, raw.data() + pos + 16, 8);
const std::uint32_t symIdx = static_cast<std::uint32_t>(rInfo >> 32);
const std::uint32_t relType = static_cast<std::uint32_t>(rInfo & 0xffffffff);
if (symIdx == 0 && relType == R_X86_64_RELATIVE)
appendRela(dynSection.RelaData, rOffset, static_cast<std::uint64_t>(R_X86_64_RELATIVE), rAddend);
}
};
extractRelative(dynRelaOffset, dynRelaSize);
extractRelative(dynJmpRelOffset, dynJmpRelSize);
std::vector<CallRegistryEntry> entries;
entries.reserve(nidRefs.size());
for (const auto& ref : nidRefs) {