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linuxboot_dma: compile for i486

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The ROM uses the cmovne instruction, which is new in Pentium Pro and does not
work when running QEMU with "-cpu 486".  Avoid producing that instruction.

Suggested-by: Richard W.M. Jones <rjones@redhat.com>
Suggested-by: Thomas Huth <thuth@redhat.com>
Reported-by: Rob Landley <rob@landley.net>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-05-31 14:37:15 +02:00
parent e2b6c1712e
commit 7e01838510
2 changed files with 1 additions and 0 deletions
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pc-bios/linuxboot_dma.bin
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pc-bios/optionrom/Makefile
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@ -13,6 +13,7 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/optionrom)
ifeq ($(lastword $(filter -O%, -O0 $(CFLAGS))),-O0) ifeq ($(lastword $(filter -O%, -O0 $(CFLAGS))),-O0)
override CFLAGS += -O2 override CFLAGS += -O2
endif endif
override CFLAGS += -march=i486
# Drop -fstack-protector and the like # Drop -fstack-protector and the like
QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) $(CFLAGS_NOPIE) -ffreestanding QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) $(CFLAGS_NOPIE) -ffreestanding