From 790092b61b1e3b14830470d9c25e46d910768458 Mon Sep 17 00:00:00 2001
From: Brad Smith <brad@comstyle.com>
Date: Sat, 12 Nov 2016 23:52:03 +0000
Subject: [PATCH] Link static PIE programs against rcrt0.o on OpenBSD

Patch by Stefan Kempf.

llvm-svn: 286735
---
 clang/lib/Driver/Tools.cpp  |  4 ++++
 clang/test/Driver/openbsd.c | 23 +++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 45ba699..a7d057c 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -8822,6 +8822,10 @@ void openbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
       if (Args.hasArg(options::OPT_pg))
         CmdArgs.push_back(
             Args.MakeArgString(getToolChain().GetFilePath("gcrt0.o")));
+      else if (Args.hasArg(options::OPT_static) &&
+               !Args.hasArg(options::OPT_nopie))
+        CmdArgs.push_back(
+            Args.MakeArgString(getToolChain().GetFilePath("rcrt0.o")));
       else
         CmdArgs.push_back(
             Args.MakeArgString(getToolChain().GetFilePath("crt0.o")));
diff --git a/clang/test/Driver/openbsd.c b/clang/test/Driver/openbsd.c
index 95b9e6a..dbc5a0e 100644
--- a/clang/test/Driver/openbsd.c
+++ b/clang/test/Driver/openbsd.c
@@ -67,3 +67,26 @@
 // CHECK-MIPS64-PIC: as{{.*}}" "-mabi" "64" "-EB" "-KPIC"
 // CHECK-MIPS64EL: as{{.*}}" "-mabi" "64" "-EL"
 // CHECK-MIPS64EL-PIC: as{{.*}}" "-mabi" "64" "-EL" "-KPIC"
+
+// Check linking against correct startup code when (not) using PIE
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-PIE %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd %s -fno-pie %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-PIE %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -static %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-STATIC-PIE %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -static -fno-pie %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-STATIC-PIE %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -nopie %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-NOPIE %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -fno-pie -nopie %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-NOPIE %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -static -nopie %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-NOPIE %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -fno-pie -static -nopie %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-NOPIE %s
+// CHECK-PIE: "{{.*}}crt0.o"
+// CHECK-PIE-NOT: "-nopie"
+// CHECK-STATIC-PIE: "{{.*}}rcrt0.o"
+// CHECK-STATIC-PIE-NOT: "-nopie"
+// CHECK-NOPIE: "-nopie" {{.*}}"${{.*}}crt0.o"
-- 
2.7.4