Some gcc versions (e.g. Fedora 22 gcc 5.1.1) seem to use floating point registers for spilling and filling of general purpose registers. As the BIOS does not activate the AFP register setting of CR0 this can cause data exception program checks. Disallow floating point in the BIOS as a simple solution.
Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com> Reviewed-by: David Hildenbrand <d...@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jf...@linux.vnet.ibm.com> Message-Id: <1443689387-34473-2-git-send-email-jf...@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com> --- pc-bios/s390-ccw/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile index 746603a..15e4232 100644 --- a/pc-bios/s390-ccw/Makefile +++ b/pc-bios/s390-ccw/Makefile @@ -10,7 +10,8 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw) .PHONY : all clean build-all OBJECTS = start.o main.o bootmap.o sclp-ascii.o virtio.o -CFLAGS += -fPIE -fno-stack-protector -ffreestanding -fno-delete-null-pointer-checks +CFLAGS += -fPIE -fno-stack-protector -ffreestanding +CFLAGS += -fno-delete-null-pointer-checks -msoft-float LDFLAGS += -Wl,-pie -nostdlib build-all: s390-ccw.img -- 2.4.3
