diff options
| author | Christian Ehrhardt <christian.ehrhardt@canonical.com> | 2020-03-20 09:38:02 +0100 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2020-05-14 21:44:13 -0400 |
| commit | 8d25ca41c5a146ebd81f442d4e241171db8fe0ae (patch) | |
| tree | 509a753b5222cd709990394a9a5c2d74f975dd99 /Makefile | |
| parent | eaaf726038cb9b2d01312d6430b4e93842aa96eb (diff) | |
| download | seabios-hppa-8d25ca41c5a146ebd81f442d4e241171db8fe0ae.zip seabios-hppa-8d25ca41c5a146ebd81f442d4e241171db8fe0ae.tar.gz seabios-hppa-8d25ca41c5a146ebd81f442d4e241171db8fe0ae.tar.bz2 | |
build: use -fcf-protection=none when available
Some hardened gcc v9 compilers (such as the one in Ubuntu)
default this option which for seabios leads to emulation errors
when running in KVM (does not trigger in TCG) on older intel
chips of the Penryn generation (~2006-2008).
The symptom appears as endbr32/endbr64 interpretation failures
and in KVM it looks like:
KVM internal error. Suberror: 1
emulation failure
EAX=00000000 EBX=00000000 ECX=000086d4 EDX=00000000
ESI=00000000 EDI=00000000 EBP=000086d4 ESP=00006d7c
EIP=00007acf EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 00000000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =0000 00000000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT= 000f6200 00000037
IDT= 00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000
DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000000
Code=b8 90 d9 00 00 66 e8 6b f7 ff ff 66 b8 0a 00 00
00 e9 61 f2 <f3> 0f 1e fb 66 57 66 56 66 53 66 53
66 89 c7 67 66 89 14 24 66 89 ce 66 e8 15 f8 ff ff 88
URL: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1866870
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -69,6 +69,7 @@ COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,) COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,) COMMONCFLAGS += $(call cc-option,$(CC),-fstack-check=no,) COMMONCFLAGS += $(call cc-option,$(CC),-Wno-address-of-packed-member,) +COMMONCFLAGS += $(call cc-option,$(CC),-fcf-protection=none,) COMMA := , CFLAGS32FLAT := $(COMMONCFLAGS) -DMODE16=0 -DMODESEGMENT=0 |