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From bb174d2f1fd3b936c1c8b75b83c6fb15b3dece2c Mon Sep 17 00:00:00 2001
From: Jakub Jirutka <jakub@jirutka.cz>
Date: Sun, 16 Apr 2017 16:49:00 +0100
Subject: [PATCH 5/7] Enable PIE by default for Alpine Linux
Alpine Linux uses PIE by default.
---
lib/Driver/ToolChains/Gnu.cpp | 4 +++-
lib/Driver/ToolChains/Linux.cpp | 5 ++++-
test/Driver/pic.c | 12 ++++++++++++
3 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
index 40ad3f5..842afb9 100644
--- a/lib/Driver/ToolChains/Gnu.cpp
+++ b/lib/Driver/ToolChains/Gnu.cpp
@@ -443,7 +443,9 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
if (!D.SysRoot.empty())
CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
- if (IsPIE)
+ if (Args.hasArg(options::OPT_nopie))
+ CmdArgs.push_back("-nopie");
+ else if (IsPIE)
CmdArgs.push_back("-pie");
if (Args.hasArg(options::OPT_rdynamic))
diff --git a/lib/Driver/ToolChains/Linux.cpp b/lib/Driver/ToolChains/Linux.cpp
index 9eea3f0..ce9cf35 100644
--- a/lib/Driver/ToolChains/Linux.cpp
+++ b/lib/Driver/ToolChains/Linux.cpp
@@ -819,7 +819,10 @@ void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
}
}
-bool Linux::isPIEDefault() const { return getSanitizerArgs().requiresPIE(); }
+bool Linux::isPIEDefault() const {
+ return getSanitizerArgs().requiresPIE() ||
+ Linux::getTriple().getVendorName().compare("alpine") == 0;
+}
SanitizerMask Linux::getSupportedSanitizers() const {
const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
diff --git a/test/Driver/pic.c b/test/Driver/pic.c
index 6b01c58..0643edd 100644
--- a/test/Driver/pic.c
+++ b/test/Driver/pic.c
@@ -251,6 +251,18 @@
// RUN: %clang %s -target i386-pc-openbsd -no-pie -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-NOPIE-LD
//
+// On Alpine Linux, we want similar PIE-by-default behavior
+// RUN: %clang -c %s -target x86_64-alpine-linux-musl -### 2>&1 \
+// RUN: | FileCheck %s --check-prefix=CHECK-PIE2
+// RUN: %clang -c %s -target i686-alpine-linux-musl -### 2>&1 \
+// RUN: | FileCheck %s --check-prefix=CHECK-PIE2
+// RUN: %clang -c %s -target armv6-alpine-linux-musleabihf -### 2>&1 \
+// RUN: | FileCheck %s --check-prefix=CHECK-PIE2
+// RUN: %clang -c %s -target armv7-alpine-linux-musleabihf -### 2>&1 \
+// RUN: | FileCheck %s --check-prefix=CHECK-PIE2
+// RUN: %clang %s -target x86_64-alpine-linux-musl -nopie -### 2>&1 \
+// RUN: | FileCheck %s --check-prefix=CHECK-NOPIE-LD
+//
// On Android PIC is enabled by default
// RUN: %clang -c %s -target i686-linux-android -### 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-PIC2
--
2.14.1
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