[patch] check if -fPIE and disable it

kernel-gcc-default-pie.patch (text/plain), 934 bytes, created by Magnus Granberg on 2016-10-04 21:13:09 UTC

--- a/Makefile	2016-10-01 18:59:31.920283338 +0200
+++ b/Makefile	2016-10-04 22:21:06.056623037 +0200
@@ -688,6 +684,12 @@ endif
 endif
 KBUILD_CFLAGS += $(stackp-flag)
 
+# Check if compiler default to -fPIE/-fpie
+ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-default-pie.sh $(CC)), y)
+	KBUILD_CFLAGS += -fno-PIE
+	KBUILD_AFLAGS += -fno-PIE
+endif
+
 ifdef CONFIG_KCOV
   ifeq ($(call cc-option, $(CFLAGS_KCOV)),)
     $(warning Cannot use CONFIG_KCOV: \
--- a/scripts/gcc-default-pie.sh	2016-10-04 22:42:53.676653594 +0200
+++ b/scripts/gcc-default-pie.sh	2016-10-04 22:03:43.816598681 +0200
@@ -0,0 +1,13 @@
+#!/bin/sh
+# Test if gcc default to -fPIE/-fpie
+# Copyright (C) 2016, Magnus Granberg <[e-mail]>
+
+cat << "END" | $@ -x c - -c -o /dev/null >/dev/null 2>&1 && echo "y"
+int main(void)
+{
+#if !(defined(__PIE__) || defined(__pie__))
+#error "Compiler don't default to PIE"
+#endif
+    return 0;
+}
+END