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[ELF] Never mark the dynamic linker as DT_NEEDED 

This patch adds logic to avoid putting the dynamic linker library (ld.so) as a
DT_NEEDED entry in the dynamic table. It should only appear in PT_INTERP.

This patch fixes SPEC programs 433, 445, 450, 453, 456, 462 when running on
Ubuntu Linux x86_64 and when linking SPEC programs with LLD and glibc 2.19.

http://reviews.llvm.org/D5573

llvm-svn: 218847
This commit is contained in:
Rafael Auler 2014-10-02 03:52:54 +00:00
parent 8400fa06b5
commit 1d73ae03c9
1 changed files with 3 additions and 0 deletions
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3
lld/lib/ReaderWriter/ELF/OutputELFWriter.h
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@ -19,6 +19,7 @@
#include "lld/ReaderWriter/Writer.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/Support/Path.h"
namespace lld {
namespace elf {
@ -193,6 +194,8 @@ void OutputELFWriter<ELFT>::buildDynamicSymbolTable(const File &file) {
if (isNeededTagRequired(sla))
_soNeeded.insert(sla->loadName());
}
// Never mark the dynamic linker as DT_NEEDED
_soNeeded.erase(sys::path::filename(_context.getInterpreter()));
for (const auto &loadName : _soNeeded) {
Elf_Dyn dyn;
dyn.d_tag = DT_NEEDED;