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lld: set sh_link and sh_info for .rela.plt sections

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ELF spec says that for SHT_REL and SHT_RELA sh_link should reference the
associated string table and sh_info should reference the "section to
which the relocation applies."  ELF Tool Chain's elfcopy / strip use
this (in part) to control whether or not the relocation entry is copied
to the output.

LLVM PR 37538 https://bugs.llvm.org/show_bug.cgi?id=37538

Approved by:	re (kib)
Obtained from:	llvm r344226 (backported for 6.0)
This commit is contained in:
Ed Maste 2018-10-11 13:19:17 +00:00
parent 43f8d28c37
commit b371a9f082
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=339304
2 changed files with 7 additions and 5 deletions
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10
contrib/llvm/tools/lld/ELF/SyntheticSections.cpp
View File

@ -1213,11 +1213,13 @@ void RelocationBaseSection::addReloc(const DynamicReloc &Reloc) {
void RelocationBaseSection::finalizeContents() {
// If all relocations are R_*_RELATIVE they don't refer to any
// dynamic symbol and we don't need a dynamic symbol table. If that
// is the case, just use 0 as the link.
Link = InX::DynSymTab ? InX::DynSymTab->getParent()->SectionIndex : 0;
// is the case, just use the index of the regular symbol table section.
getParent()->Link = InX::DynSymTab ?
InX::DynSymTab->getParent()->SectionIndex :
InX::SymTab->getParent()->SectionIndex;
// Set required output section properties.
getParent()->Link = Link;
if (InX::RelaIplt == this || InX::RelaPlt == this)
getParent()->Info = InX::GotPlt->getParent()->SectionIndex;
}
template <class ELFT>

2
lib/clang/include/lld/Common/Version.inc
View File

@ -7,4 +7,4 @@
#define LLD_REPOSITORY_STRING "FreeBSD"
// <Upstream revision at import>-<Local identifier in __FreeBSD_version style>
#define LLD_REVISION_STRING "335540-1200004"
#define LLD_REVISION_STRING "335540-1200005"