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Don't gc .interp section. 

This change fixes a bug that was introduced by r285851.
r285851 converted .interp section as an output section to an input
section. But I forgot to make it a "Live" section, so if -gc-section
is given, it was garbage collected.

llvm-svn: 286025
This commit is contained in:
Rui Ueyama 2016-11-04 22:25:39 +00:00
parent 4ce3e0c31a
commit a9ee8d6ecc
2 changed files with 21 additions and 1 deletions
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6
lld/ELF/SyntheticSections.cpp
View File

@ -46,12 +46,16 @@ static ArrayRef<uint8_t> createInterp() {
template <class ELFT>
InterpSection<ELFT>::InterpSection()
: InputSection<ELFT>(SHF_ALLOC, SHT_PROGBITS, 1, createInterp(),
".interp") {}
".interp") {
this->Live = true;
}
template <class ELFT>
BuildIdSection<ELFT>::BuildIdSection(size_t HashSize)
: InputSection<ELFT>(SHF_ALLOC, SHT_NOTE, 1, ArrayRef<uint8_t>(),
".note.gnu.build-id") {
this->Live = true;
Buf.resize(16 + HashSize);
const endianness E = ELFT::TargetEndianness;
write32<E>(Buf.data(), 4); // Name size

16
lld/test/ELF/gc-sections-synthetic.s Normal file
View File

@ -0,0 +1,16 @@
# REQUIRES: x86
# Linker-synthesized sections shouldn't be gc'ed.
# RUN: llvm-mc -filetype=obj -triple=i686-unknown-linux %p/Inputs/shared.s -o %t.o
# RUN: ld.lld %t2 -shared -o %t.so
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t2
# RUN: ld.lld %t2 %t.so -build-id -dynamic-linker /foo/bar -o %t.out
# RUN: llvm-readobj -sections %t.out | FileCheck %s
# CHECK: Name: .interp
# CHECK: Name: .note.gnu.build-id
.globl _start
_start:
ret