From af3c15fee54e841d859d003b90a88042daf6cd7a Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Thu, 1 Oct 2015 10:49:43 +0200 Subject: [PATCH] pc-bios/s390-ccw: avoid floating point operations 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 Reviewed-by: David Hildenbrand Signed-off-by: Jens Freimann Message-Id: <1443689387-34473-2-git-send-email-jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger --- 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 746603a315..15e423274f 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