9b536d7f79
- Accept both `--foo bar` and `--foo=bar` styles options. - Add support for -z initfirst. - Generate __data_start symbol that marks the start of .data when __data_start is referenced from code being linked. From Brad (maintainer)
47 lines
2.1 KiB
Plaintext
47 lines
2.1 KiB
Plaintext
$OpenBSD: patch-tools_lld_ELF_SyntheticSections_cpp,v 1.8 2018/10/25 09:25:38 ajacoutot Exp $
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- Add support for -z initfirst.
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- When merging sections into the output, lld tries to adjust the alignment of
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the section to be at least as large as the entry size of the section.
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This causes a later check that validates the alignment to fail if the
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entry size isn't a power of two. This happens when building some of the
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java support code in ports gcc. Fix this by sticking to the original
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alignment if the entry size isn't a power of two.
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- Work around a bug where discarding the .ARM.exidx section in the armv7 kernel
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linker script makes ld.lld(1) crash. This has been fixed in a different
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(proper?) way upstream but backporting their fix is a bit too invasive.
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Index: tools/lld/ELF/SyntheticSections.cpp
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--- tools/lld/ELF/SyntheticSections.cpp.orig
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+++ tools/lld/ELF/SyntheticSections.cpp
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@@ -1034,6 +1034,8 @@ template <class ELFT> void DynamicSection<ELFT>::final
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uint32_t DtFlags1 = 0;
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if (Config->Bsymbolic)
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DtFlags |= DF_SYMBOLIC;
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+ if (Config->ZInitfirst)
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+ DtFlags1 |= DF_1_INITFIRST;
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if (Config->ZNodelete)
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DtFlags1 |= DF_1_NODELETE;
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if (Config->ZNodlopen)
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@@ -2512,7 +2514,9 @@ void elf::mergeSections() {
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continue;
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StringRef OutsecName = getOutputSectionName(MS);
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- uint32_t Alignment = std::max<uint32_t>(MS->Alignment, MS->Entsize);
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+ uint32_t Alignment = MS->Alignment;
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+ if (isPowerOf2_32(MS->Entsize))
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+ Alignment = std::max<uint32_t>(Alignment, MS->Entsize);
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auto I = llvm::find_if(MergeSections, [=](MergeSyntheticSection *Sec) {
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// While we could create a single synthetic section for two different
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@@ -2571,6 +2575,9 @@ void ARMExidxSentinelSection::writeTo(uint8_t *Buf) {
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// The sentinel has to be removed if there are no other .ARM.exidx entries.
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bool ARMExidxSentinelSection::empty() const {
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OutputSection *OS = getParent();
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+ if (!OS)
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+ return false;
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+
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for (auto *B : OS->SectionCommands)
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if (auto *ISD = dyn_cast<InputSectionDescription>(B))
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for (auto *S : ISD->Sections)
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