[PATCH] D49374: [ELF] - Support -z global
George Rimar via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Jul 16 07:19:16 PDT 2018
grimar created this revision.
grimar added a reviewer: ruiu.
Herald added subscribers: arichardson, emaste.
Herald added a reviewer: espindola.
-z global is a flag used on Android (see https://reviews.llvm.org/D49198).
Since it is trivial and helps to make LLD a drop-in replacement for bfd,
I think we can add a support.
https://reviews.llvm.org/D49374
Files:
ELF/Config.h
ELF/Driver.cpp
ELF/SyntheticSections.cpp
test/ELF/dt_flags.s
Index: test/ELF/dt_flags.s
===================================================================
--- test/ELF/dt_flags.s
+++ test/ELF/dt_flags.s
@@ -3,7 +3,8 @@
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
# RUN: ld.lld -shared %t -o %t.so
-# RUN: ld.lld -z initfirst -z now -z nodelete -z nodlopen -z origin -Bsymbolic %t %t.so -o %t1
+# RUN: ld.lld -z global -z initfirst -z now -z nodelete -z nodlopen -z origin \
+# RUN: -Bsymbolic %t %t.so -o %t1
# RUN: llvm-readobj -dynamic-table %t1 | FileCheck -check-prefix=FLAGS %s
# RUN: ld.lld %t %t.so -o %t2
@@ -14,7 +15,7 @@
# FLAGS: DynamicSection [
# FLAGS: 0x000000000000001E FLAGS ORIGIN SYMBOLIC BIND_NOW
-# FLAGS: 0x000000006FFFFFFB FLAGS_1 NOW NODELETE INITFIRST NOOPEN ORIGIN
+# FLAGS: 0x000000006FFFFFFB FLAGS_1 NOW GLOBAL NODELETE INITFIRST NOOPEN ORIGIN
# FLAGS: ]
# CHECK: DynamicSection [
Index: ELF/SyntheticSections.cpp
===================================================================
--- ELF/SyntheticSections.cpp
+++ ELF/SyntheticSections.cpp
@@ -1244,6 +1244,8 @@
uint32_t DtFlags1 = 0;
if (Config->Bsymbolic)
DtFlags |= DF_SYMBOLIC;
+ if (Config->ZGlobal)
+ DtFlags1 |= DF_1_GLOBAL;
if (Config->ZInitfirst)
DtFlags1 |= DF_1_INITFIRST;
if (Config->ZNodelete)
Index: ELF/Driver.cpp
===================================================================
--- ELF/Driver.cpp
+++ ELF/Driver.cpp
@@ -327,10 +327,10 @@
static bool isKnown(StringRef S) {
return S == "combreloc" || S == "copyreloc" || S == "defs" ||
- S == "execstack" || S == "hazardplt" || S == "initfirst" ||
- S == "keep-text-section-prefix" || S == "lazy" || S == "muldefs" ||
- S == "nocombreloc" || S == "nocopyreloc" || S == "nodelete" ||
- S == "nodlopen" || S == "noexecstack" ||
+ S == "execstack" || S == "global" || S == "hazardplt" ||
+ S == "initfirst" || S == "keep-text-section-prefix" || S == "lazy" ||
+ S == "muldefs" || S == "nocombreloc" || S == "nocopyreloc" ||
+ S == "nodelete" || S == "nodlopen" || S == "noexecstack" ||
S == "nokeep-text-section-prefix" || S == "norelro" || S == "notext" ||
S == "now" || S == "origin" || S == "relro" || S == "retpolineplt" ||
S == "rodynamic" || S == "text" || S == "wxneeded" ||
@@ -817,6 +817,7 @@
Config->ZCombreloc = getZFlag(Args, "combreloc", "nocombreloc", true);
Config->ZCopyreloc = getZFlag(Args, "copyreloc", "nocopyreloc", true);
Config->ZExecstack = getZFlag(Args, "execstack", "noexecstack", false);
+ Config->ZGlobal = hasZOption(Args, "global");
Config->ZHazardplt = hasZOption(Args, "hazardplt");
Config->ZInitfirst = hasZOption(Args, "initfirst");
Config->ZKeepTextSectionPrefix = getZFlag(
Index: ELF/Config.h
===================================================================
--- ELF/Config.h
+++ ELF/Config.h
@@ -173,6 +173,7 @@
bool ZCombreloc;
bool ZCopyreloc;
bool ZExecstack;
+ bool ZGlobal;
bool ZHazardplt;
bool ZInitfirst;
bool ZKeepTextSectionPrefix;
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