diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2015-06-15 12:24:03 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-06-15 13:31:33 +0200 |
| commit | 8369e339d24f365750da456588e742674c153437 (patch) | |
| tree | 5585cd4ff31f51647d4afb7649dee7887d0ceef1 /pc-bios/s390-ccw/Makefile | |
| parent | 795dc6e46d953d70b4b7ddd3f4956f8f4b9d8565 (diff) | |
s390/bios: build with -fdelete-null-pointer-checks
Starting with version 4.9, GCC assumes it can't safely dereference null
pointers, and uses this for some optimizations. On s390, the lowcore
memory is located at address 0, so this assumption is wrong and breaks
the s390-ccw firmware. Pass -fdelete-null-pointer-checks to avoid that.
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <1434363843-14576-1-git-send-email-aurelien@aurel32.net>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'pc-bios/s390-ccw/Makefile')
| -rw-r--r-- | pc-bios/s390-ccw/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile index 009bb8de1c..746603a315 100644 --- a/pc-bios/s390-ccw/Makefile +++ b/pc-bios/s390-ccw/Makefile @@ -10,7 +10,7 @@ $(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 +CFLAGS += -fPIE -fno-stack-protector -ffreestanding -fno-delete-null-pointer-checks LDFLAGS += -Wl,-pie -nostdlib build-all: s390-ccw.img |