[PATCH 1/3] rust: arch/um: Use 'pie' relocation mode under UML

[David Gow]

UML expects a position independent executable for some reason, so tell
rustc to generate pie objects. Otherwise we get a bunch of relocations
we can't deal with in libcore.

Signed-off-by: David Gow <davidgow at google.com>
---
 arch/um/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/um/Makefile b/arch/um/Makefile
index f1d4d67157be..ae321282dc6f 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -68,6 +68,8 @@ KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
 	-Din6addr_loopback=kernel_in6addr_loopback \
 	-Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
 
+KBUILD_RUSTFLAGS += -Crelocation-model=pie
+
 KBUILD_AFLAGS += $(ARCH_INCLUDE)
 
 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
-- 
2.39.0.314.g84b9a713c41-goog