[lld] r361806 - Revert [ELF] Error on relocations to STT_SECTION symbols if the sections were discarded
Haojian Wu via llvm-commits
llvm-commits at lists.llvm.org
Tue May 28 04:21:59 PDT 2019
Author: hokein
Date: Tue May 28 04:21:59 2019
New Revision: 361806
URL: http://llvm.org/viewvc/llvm-project?rev=361806&view=rev
Log:
Revert [ELF] Error on relocations to STT_SECTION symbols if the sections were discarded
This reverts r361792 (git commit cfca5095df0209c60109696d6cc368d49e2c5939), the
revision causes link errors internally, will share more details with the
author.
Modified:
lld/trunk/ELF/InputFiles.cpp
lld/trunk/ELF/InputSection.cpp
lld/trunk/ELF/Relocations.cpp
lld/trunk/test/ELF/comdat-discarded-error.s
lld/trunk/test/ELF/comdat-discarded-reloc.s
lld/trunk/test/ELF/comdat.s
lld/trunk/test/ELF/invalid-undef-section-symbol.test
lld/trunk/test/ELF/relocatable-eh-frame.s
Modified: lld/trunk/ELF/InputFiles.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/InputFiles.cpp?rev=361806&r1=361805&r2=361806&view=diff
==============================================================================
--- lld/trunk/ELF/InputFiles.cpp (original)
+++ lld/trunk/ELF/InputFiles.cpp Tue May 28 04:21:59 2019
@@ -997,9 +997,6 @@ template <class ELFT> void ObjFile<ELFT>
if (ESym.st_shndx == SHN_UNDEF)
this->Symbols[I] = make<Undefined>(this, Name, Binding, StOther, Type);
- else if (Sec == &InputSection::Discarded)
- this->Symbols[I] = make<Undefined>(this, Name, Binding, StOther, Type,
- /*DiscardedSecIdx=*/SecIdx);
else
this->Symbols[I] =
make<Defined>(this, Name, Binding, StOther, Type, Value, Size, Sec);
Modified: lld/trunk/ELF/InputSection.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/InputSection.cpp?rev=361806&r1=361805&r2=361806&view=diff
==============================================================================
--- lld/trunk/ELF/InputSection.cpp (original)
+++ lld/trunk/ELF/InputSection.cpp Tue May 28 04:21:59 2019
@@ -438,8 +438,7 @@ void InputSection::copyRelocations(uint8
// hopefully creates a frame that is ignored at runtime.
auto *D = dyn_cast<Defined>(&Sym);
if (!D) {
- warn("STT_SECTION symbol should be defined");
- P->setSymbolAndType(0, 0, false);
+ error("STT_SECTION symbol should be defined");
continue;
}
SectionBase *Section = D->Section->Repl;
Modified: lld/trunk/ELF/Relocations.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/Relocations.cpp?rev=361806&r1=361805&r2=361806&view=diff
==============================================================================
--- lld/trunk/ELF/Relocations.cpp (original)
+++ lld/trunk/ELF/Relocations.cpp Tue May 28 04:21:59 2019
@@ -681,17 +681,9 @@ static std::string maybeReportDiscarded(
return "";
ArrayRef<Elf_Shdr_Impl<ELFT>> ObjSections =
CHECK(File->getObj().sections(), File);
-
- std::string Msg;
- if (Sym.Type == ELF::STT_SECTION) {
- Msg = "relocation refers to a discarded section: ";
- Msg += CHECK(
- File->getObj().getSectionName(&ObjSections[Sym.DiscardedSecIdx]), File);
- } else {
- Msg = "relocation refers to a symbol in a discarded section: " +
- toString(Sym);
- }
- Msg += "\n>>> defined in " + toString(File);
+ std::string Msg =
+ "relocation refers to a symbol in a discarded section: " + toString(Sym) +
+ "\n>>> defined in " + toString(File);
Elf_Shdr_Impl<ELFT> ELFSec = ObjSections[Sym.DiscardedSecIdx - 1];
if (ELFSec.sh_type != SHT_GROUP)
Modified: lld/trunk/test/ELF/comdat-discarded-error.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/comdat-discarded-error.s?rev=361806&r1=361805&r2=361806&view=diff
==============================================================================
--- lld/trunk/test/ELF/comdat-discarded-error.s (original)
+++ lld/trunk/test/ELF/comdat-discarded-error.s Tue May 28 04:21:59 2019
@@ -5,7 +5,7 @@
# RUN: echo '.section .text.foo,"axG", at progbits,foo,comdat; .globl bar; bar:' | \
# RUN: llvm-mc -filetype=obj -triple=x86_64 - -o %t3.o
-# RUN: not ld.lld %t2.o %t3.o %t1.o -o /dev/null 2>&1 | FileCheck %s
+# RUN: not ld.lld %t1.o %t2.o %t3.o -o /dev/null 2>&1 | FileCheck %s
# CHECK: error: relocation refers to a symbol in a discarded section: bar
# CHECK-NEXT: >>> defined in {{.*}}3.o
@@ -13,16 +13,6 @@
# CHECK-NEXT: >>> prevailing definition is in {{.*}}2.o
# CHECK-NEXT: >>> referenced by {{.*}}1.o:(.text+0x1)
-# CHECK: error: relocation refers to a discarded section: .text.foo
-# CHECK-NEXT: >>> defined in {{.*}}1.o
-# CHECK-NEXT: >>> section group signature: foo
-# CHECK-NEXT: >>> prevailing definition is in {{.*}}2.o
-# CHECK-NEXT: >>> referenced by {{.*}}1.o:(.data+0x0)
-
.globl _start
_start:
jmp bar
-
-.section .text.foo,"axG", at progbits,foo,comdat
-.data
- .quad .text.foo
Modified: lld/trunk/test/ELF/comdat-discarded-reloc.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/comdat-discarded-reloc.s?rev=361806&r1=361805&r2=361806&view=diff
==============================================================================
--- lld/trunk/test/ELF/comdat-discarded-reloc.s (original)
+++ lld/trunk/test/ELF/comdat-discarded-reloc.s Tue May 28 04:21:59 2019
@@ -1,7 +1,7 @@
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %p/Inputs/comdat-discarded-reloc.s -o %t2.o
-# RUN: ld.lld -gc-sections --noinhibit-exec %t.o %t2.o -o /dev/null
+# RUN: ld.lld -gc-sections %t.o %t2.o -o %t
## ELF spec doesn't allow a relocation to point to a deduplicated
## COMDAT section. Unfortunately this happens in practice (e.g. .eh_frame)
Modified: lld/trunk/test/ELF/comdat.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/comdat.s?rev=361806&r1=361805&r2=361806&view=diff
==============================================================================
--- lld/trunk/test/ELF/comdat.s (original)
+++ lld/trunk/test/ELF/comdat.s Tue May 28 04:21:59 2019
@@ -1,7 +1,7 @@
// REQUIRES: x86
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %p/Inputs/comdat.s -o %t2.o
-// RUN: ld.lld -shared %t.o %t2.o -o %t
+// RUN: ld.lld -shared %t.o %t.o %t2.o -o %t
// RUN: llvm-objdump -d %t | FileCheck %s
// RUN: llvm-readobj -S --symbols %t | FileCheck --check-prefix=READ %s
@@ -31,7 +31,9 @@ foo:
// CHECK-EMPTY:
// CHECK-NEXT: bar:
// 0x1000 - 0x1001 - 5 = -6
+// 0 - 0x1006 - 5 = -4107
// CHECK-NEXT: 1001: {{.*}} callq -6
+// CHECK-NEXT: 1006: {{.*}} callq -4107
.section .text3,"axG", at progbits,zed,comdat,unique,0
Modified: lld/trunk/test/ELF/invalid-undef-section-symbol.test
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/invalid-undef-section-symbol.test?rev=361806&r1=361805&r2=361806&view=diff
==============================================================================
--- lld/trunk/test/ELF/invalid-undef-section-symbol.test (original)
+++ lld/trunk/test/ELF/invalid-undef-section-symbol.test Tue May 28 04:21:59 2019
@@ -1,5 +1,5 @@
# RUN: yaml2obj %s -o %t.o
-# RUN: not ld.lld -r --fatal-warnings %t.o -o /dev/null 2>&1 | FileCheck %s
+# RUN: not ld.lld -r %t.o -o /dev/null 2>&1 | FileCheck %s
# We used to crash at this.
# CHECK: STT_SECTION symbol should be defined
Modified: lld/trunk/test/ELF/relocatable-eh-frame.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/relocatable-eh-frame.s?rev=361806&r1=361805&r2=361806&view=diff
==============================================================================
--- lld/trunk/test/ELF/relocatable-eh-frame.s (original)
+++ lld/trunk/test/ELF/relocatable-eh-frame.s Tue May 28 04:21:59 2019
@@ -1,12 +1,10 @@
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
-# RUN: ld.lld -r %t.o %t.o -o %t 2>&1 | FileCheck --check-prefix=WARN %s
+# RUN: ld.lld -r %t.o %t.o -o %t
# RUN: llvm-readobj -r %t | FileCheck %s
# RUN: ld.lld %t -o %t.so -shared
# RUN: llvm-objdump -h %t.so | FileCheck --check-prefix=DSO %s
-# WARN: STT_SECTION symbol should be defined
-
# DSO: .eh_frame 00000034
# CHECK: Relocations [
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