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[ELF] Support input section description .rel[a].dyn in /DISCARD/

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Reviewed By: ruiu

Differential Revision: https://reviews.llvm.org/D70695
This commit is contained in:
Fangrui Song 2019-11-25 13:24:18 -08:00
parent 92f1446b8b
commit a71c1e2a57
2 changed files with 16 additions and 5 deletions
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2
lld/ELF/LinkerScript.cpp
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@ -442,7 +442,7 @@ LinkerScript::computeInputSections(const InputSectionDescription *cmd) {
}
void LinkerScript::discard(InputSectionBase *s) {
if (s == in.shStrTab || s == mainPart->relaDyn || s == mainPart->relrDyn)
if (s == in.shStrTab || s == mainPart->relrDyn)
error("discarding " + s->name + " section is not allowed");
// You can discard .hash and .gnu.hash sections by linker scripts. Since

19
lld/test/ELF/linkerscript/discard-section-err.s
View File

@ -20,8 +20,19 @@
# RUN: ld.lld -pie -o %t --script %t.script %t.o
# RUN: echo "SECTIONS { /DISCARD/ : { *(.rela.dyn) } }" > %t.script
# RUN: not ld.lld -pie -o %t --script %t.script %t.o 2>&1 | \
# RUN: FileCheck -check-prefix=RELADYN %s
# RELADYN: discarding .rela.dyn section is not allowed
# RUN: ld.lld -pie -o %t %t.o
# RUN: llvm-readobj -S %t | FileCheck --check-prefix=RELADYN %s
# RELADYN: Name: .rela.dyn
# RUN: ld.lld -pie -o %t --script %t.script %t.o
# RUN: llvm-readobj -S %t | FileCheck /dev/null --implicit-check-not='Name: .rela.dyn'
.comm foo,4,4
# RUN: echo "SECTIONS { /DISCARD/ : { *(.relr.dyn) } }" > %t.script
# RUN: not ld.lld -pie --pack-dyn-relocs=relr -o %t --script %t.script %t.o 2>&1 | \
# RUN: FileCheck -check-prefix=RELRDYN %s
# RELRDYN: discarding .relr.dyn section is not allowed
.data
.align 8
foo:
## Emits an R_X86_64_RELATIVE in -pie mode.
.quad foo