danalbert created this revision.
danalbert added a reviewer: srhines.
Android does not support executable stacks.
Repository:
rC Clang
https://reviews.llvm.org/D53343
Files:
include/clang/Driver/ToolChain.h
lib/Driver/ToolChain.cpp
lib/Driver/ToolChains/Clang.cpp
lib/Driver/ToolChains/Gnu.cpp
lib/Driver/ToolChains/Linux.cpp
lib/Driver/ToolChains/Linux.h
test/Driver/integrated-as.c
test/Driver/linux-as.c
test/Driver/linux-ld.c
Index: test/Driver/linux-ld.c
===================================================================
--- test/Driver/linux-ld.c
+++ test/Driver/linux-ld.c
@@ -989,6 +989,15 @@
// RUN: | FileCheck --check-prefix=CHECK-ANDROID-HASH-STYLE-M %s
// CHECK-ANDROID-HASH-STYLE-M: "{{.*}}ld{{(.exe)?}}"
// CHECK-ANDROID-HASH-STYLE-M: "--hash-style=gnu"
+
+// RUN: %clang %s -### -o %t.o 2>&1 \
+// RUN: --target=armv7-linux-android21 \
+// RUN: | FileCheck --check-prefix=CHECK-ANDROID-NOEXECSTACK %s
+// CHECK-ANDROID-NOEXECSTACK: "{{.*}}ld{{(.exe)?}}"
+// CHECK-ANDROID-NOEXECSTACK: "-z" "noexecstack"
+// CHECK-ANDROID-NOEXECSTACK-NOT: "-z" "execstack"
+// CHECK-ANDROID-NOEXECSTACK-NOT: "-z,execstack"
+// CHECK-ANDROID-NOEXECSTACK-NOT: "-zexecstack"
//
// RUN: %clang %s -### -o %t.o 2>&1 --target=mips64-linux-gnuabin32 \
// RUN: | FileCheck --check-prefix=CHECK-MIPS64EL-GNUABIN32 %s
Index: test/Driver/linux-as.c
===================================================================
--- test/Driver/linux-as.c
+++ test/Driver/linux-as.c
@@ -108,12 +108,12 @@
// RUN: %clang -target arm-linux-androideabi -### \
// RUN: -no-integrated-as -c %s 2>&1 \
// RUN: | FileCheck -check-prefix=CHECK-ARM-ANDROID %s
-// CHECK-ARM-ANDROID: as{{(.exe)?}}" "-EL" "-mfloat-abi=soft"
+// CHECK-ARM-ANDROID: as{{(.exe)?}}" "--noexecstack" "-EL" "-mfloat-abi=soft"
//
// RUN: %clang -target arm-linux-androideabi -march=armv7-a -### \
// RUN: -no-integrated-as -c %s 2>&1 \
// RUN: | FileCheck -check-prefix=CHECK-ARM-ANDROID-SOFTFP %s
-// CHECK-ARM-ANDROID-SOFTFP: as{{(.exe)?}}" "-EL" "-mfloat-abi=softfp" "-march=armv7-a"
+// CHECK-ARM-ANDROID-SOFTFP: as{{(.exe)?}}" "--noexecstack" "-EL" "-mfloat-abi=softfp" "-march=armv7-a"
//
// RUN: %clang -target arm-linux-eabi -mhard-float -### \
// RUN: -no-integrated-as -c %s 2>&1 \
Index: test/Driver/integrated-as.c
===================================================================
--- test/Driver/integrated-as.c
+++ test/Driver/integrated-as.c
@@ -13,3 +13,8 @@
// NOFIAS-NOT: cc1as
// NOFIAS: -cc1
// NOFIAS: -no-integrated-as
+
+// RUN: %clang -target arm-linux-androideabi -### \
+// RUN: -integrated-as -c %s 2>&1 \
+// RUN: | FileCheck -check-prefix=CHECK-ARM-ANDROID %s
+// CHECK-ARM-ANDROID: "-mnoexecstack"
Index: lib/Driver/ToolChains/Linux.h
===================================================================
--- lib/Driver/ToolChains/Linux.h
+++ lib/Driver/ToolChains/Linux.h
@@ -38,6 +38,7 @@
void AddIAMCUIncludeArgs(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const override;
bool isPIEDefault() const override;
+ bool isNoExecStackDefault() const override;
bool IsMathErrnoDefault() const override;
SanitizerMask getSupportedSanitizers() const override;
void addProfileRTLibs(const llvm::opt::ArgList &Args,
Index: lib/Driver/ToolChains/Linux.cpp
===================================================================
--- lib/Driver/ToolChains/Linux.cpp
+++ lib/Driver/ToolChains/Linux.cpp
@@ -955,6 +955,10 @@
getTriple().isMusl() || getSanitizerArgs().requiresPIE();
}
+bool Linux::isNoExecStackDefault() const {
+ return getTriple().isAndroid();
+}
+
bool Linux::IsMathErrnoDefault() const {
if (getTriple().isAndroid())
return false;
Index: lib/Driver/ToolChains/Gnu.cpp
===================================================================
--- lib/Driver/ToolChains/Gnu.cpp
+++ lib/Driver/ToolChains/Gnu.cpp
@@ -353,6 +353,11 @@
if (IsPIE)
CmdArgs.push_back("-pie");
+ if (ToolChain.isNoExecStackDefault()) {
+ CmdArgs.push_back("-z");
+ CmdArgs.push_back("noexecstack");
+ }
+
if (Args.hasArg(options::OPT_rdynamic))
CmdArgs.push_back("-export-dynamic");
@@ -599,6 +604,10 @@
}
}
+ if (getToolChain().isNoExecStackDefault()) {
+ CmdArgs.push_back("--noexecstack");
+ }
+
switch (getToolChain().getArch()) {
default:
break;
Index: lib/Driver/ToolChains/Clang.cpp
===================================================================
--- lib/Driver/ToolChains/Clang.cpp
+++ lib/Driver/ToolChains/Clang.cpp
@@ -1933,6 +1933,7 @@
bool TakeNextArg = false;
bool UseRelaxRelocations = C.getDefaultToolChain().useRelaxRelocations();
+ bool UseNoExecStack = C.getDefaultToolChain().isNoExecStackDefault();
const char *MipsTargetFeature = nullptr;
for (const Arg *A :
Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) {
@@ -2014,7 +2015,7 @@
} else if (Value == "--fatal-warnings") {
CmdArgs.push_back("-massembler-fatal-warnings");
} else if (Value == "--noexecstack") {
- CmdArgs.push_back("-mnoexecstack");
+ UseNoExecStack = true;
} else if (Value.startswith("-compress-debug-sections") ||
Value.startswith("--compress-debug-sections") ||
Value == "-nocompress-debug-sections" ||
@@ -2074,6 +2075,8 @@
}
if (UseRelaxRelocations)
CmdArgs.push_back("--mrelax-relocations");
+ if (UseNoExecStack)
+ CmdArgs.push_back("-mnoexecstack");
if (MipsTargetFeature != nullptr) {
CmdArgs.push_back("-target-feature");
CmdArgs.push_back(MipsTargetFeature);
Index: lib/Driver/ToolChain.cpp
===================================================================
--- lib/Driver/ToolChain.cpp
+++ lib/Driver/ToolChain.cpp
@@ -113,6 +113,10 @@
return ENABLE_X86_RELAX_RELOCATIONS;
}
+bool ToolChain::isNoExecStackDefault() const {
+ return false;
+}
+
const SanitizerArgs& ToolChain::getSanitizerArgs() const {
if (!SanitizerArguments.get())
SanitizerArguments.reset(new SanitizerArgs(*this, Args));
Index: include/clang/Driver/ToolChain.h
===================================================================
--- include/clang/Driver/ToolChain.h
+++ include/clang/Driver/ToolChain.h
@@ -390,6 +390,9 @@
/// Test whether this toolchain defaults to PIE.
virtual bool isPIEDefault() const = 0;
+ /// Test whether this toolchaind defaults to non-executable stacks.
+ virtual bool isNoExecStackDefault() const;
+
/// Tests whether this toolchain forces its default for PIC, PIE or
/// non-PIC. If this returns true, any PIC related flags should be ignored
/// and instead the results of \c isPICDefault() and \c isPIEDefault() are
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