[PATCH 03/18] Set -msoft-float and assembler target options in the bootwrapper.
From: Scott Wood <hidden>
Date: 2007-01-24 21:07:08
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Without -msoft-float, floating point state saving code can be executed (at least with certain buggy versions of GCC, which don't clear bit 6 of CR before calling a varargs function with no varargs parameters). Without the assembler target option, the assembler will use the old dedicated mftb/mftbu instructions, rather than mfspr. This causes the boot to hang on e500, which doesn't have the dedicated instructions. Signed-off-by: Scott Wood <redacted> --- arch/powerpc/Makefile | 1 + arch/powerpc/boot/Makefile | 3 ++- 2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index a00fe72..2309cdf 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile@@ -118,6 +118,7 @@ cpu-as-$(CONFIG_E200) += -Wa,-me200 AFLAGS += $(cpu-as-y) CFLAGS += $(cpu-as-y) +export cpu-as-y head-y := arch/powerpc/kernel/head_32.o head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 906b166..e95c1b0 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile@@ -24,7 +24,8 @@ all: $(obj)/zImage HOSTCC := gcc BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \ - $(shell $(CROSS32CC) -print-file-name=include) -fPIC + $(shell $(CROSS32CC) -print-file-name=include) -fPIC \ + $(cpu-as-y) -msoft-float BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc ifeq ($(call cc-option-yn, -fstack-protector),y)
--
1.4.4