* [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount
@ 2018-03-13 13:34 Antoine
2018-03-13 17:48 ` [Qemu-devel] [Bug 1755479] " Peter Maydell
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: Antoine @ 2018-03-13 13:34 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
** Affects: qemu
Importance: Undecided
Status: New
** Attachment added: "hello.bin"
https://bugs.launchpad.net/bugs/1755479/+attachment/5078133/+files/hello.bin
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https://bugs.launchpad.net/bugs/1755479
Title:
Cortex M:qemu abort with optimized code and icount
Status in QEMU:
New
Bug description:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1755479/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] [Bug 1755479] Re: Cortex M:qemu abort with optimized code and icount
2018-03-13 13:34 [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount Antoine
@ 2018-03-13 17:48 ` Peter Maydell
2018-03-13 18:11 ` Antoine
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Peter Maydell @ 2018-03-13 17:48 UTC (permalink / raw)
To: qemu-devel
Yes, it looks like we accidentally broke icount. This patch from the mailing list fixes it:
https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg06595.html
though it hasn't been code-reviewed yet.
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https://bugs.launchpad.net/bugs/1755479
Title:
Cortex M:qemu abort with optimized code and icount
Status in QEMU:
New
Bug description:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1755479/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] [Bug 1755479] Re: Cortex M:qemu abort with optimized code and icount
2018-03-13 13:34 [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount Antoine
2018-03-13 17:48 ` [Qemu-devel] [Bug 1755479] " Peter Maydell
@ 2018-03-13 18:11 ` Antoine
2018-03-15 11:37 ` Peter Maydell
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Antoine @ 2018-03-13 18:11 UTC (permalink / raw)
To: qemu-devel
I just tested the patch and it resolves this problem. Thanks!
--
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1755479
Title:
Cortex M:qemu abort with optimized code and icount
Status in QEMU:
New
Bug description:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1755479/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] [Bug 1755479] Re: Cortex M:qemu abort with optimized code and icount
2018-03-13 13:34 [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount Antoine
2018-03-13 17:48 ` [Qemu-devel] [Bug 1755479] " Peter Maydell
2018-03-13 18:11 ` Antoine
@ 2018-03-15 11:37 ` Peter Maydell
2018-03-15 14:37 ` philmd
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Peter Maydell @ 2018-03-15 11:37 UTC (permalink / raw)
To: qemu-devel
** Tags added: arm
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1755479
Title:
Cortex M:qemu abort with optimized code and icount
Status in QEMU:
New
Bug description:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1755479/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] [Bug 1755479] Re: Cortex M:qemu abort with optimized code and icount
2018-03-13 13:34 [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount Antoine
` (2 preceding siblings ...)
2018-03-15 11:37 ` Peter Maydell
@ 2018-03-15 14:37 ` philmd
2018-03-15 14:51 ` Peter Maydell
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: philmd @ 2018-03-15 14:37 UTC (permalink / raw)
To: qemu-devel
Hey Antoine, do you mind replying to the list thread with a single line
such:
Tested-by: Antoine Calando <acalando@free.fr>
This will help the code review and the patch will probably get merged
faster.
Thanks.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1755479
Title:
Cortex M:qemu abort with optimized code and icount
Status in QEMU:
New
Bug description:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1755479/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] [Bug 1755479] Re: Cortex M:qemu abort with optimized code and icount
2018-03-13 13:34 [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount Antoine
` (3 preceding siblings ...)
2018-03-15 14:37 ` philmd
@ 2018-03-15 14:51 ` Peter Maydell
2018-04-10 13:50 ` Peter Maydell
2018-04-26 10:38 ` Thomas Huth
6 siblings, 0 replies; 8+ messages in thread
From: Peter Maydell @ 2018-03-15 14:51 UTC (permalink / raw)
To: qemu-devel
That's not really necessary as the patch is already in Paolo's pull
request.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1755479
Title:
Cortex M:qemu abort with optimized code and icount
Status in QEMU:
New
Bug description:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1755479/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] [Bug 1755479] Re: Cortex M:qemu abort with optimized code and icount
2018-03-13 13:34 [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount Antoine
` (4 preceding siblings ...)
2018-03-15 14:51 ` Peter Maydell
@ 2018-04-10 13:50 ` Peter Maydell
2018-04-26 10:38 ` Thomas Huth
6 siblings, 0 replies; 8+ messages in thread
From: Peter Maydell @ 2018-04-10 13:50 UTC (permalink / raw)
To: qemu-devel
This is now fixed in master (and will be in 2.12.0) with commits
0790f8686107 and 87f963be66a32453e001.
** Changed in: qemu
Status: New => Fix Committed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1755479
Title:
Cortex M:qemu abort with optimized code and icount
Status in QEMU:
Fix Committed
Bug description:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1755479/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] [Bug 1755479] Re: Cortex M:qemu abort with optimized code and icount
2018-03-13 13:34 [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount Antoine
` (5 preceding siblings ...)
2018-04-10 13:50 ` Peter Maydell
@ 2018-04-26 10:38 ` Thomas Huth
6 siblings, 0 replies; 8+ messages in thread
From: Thomas Huth @ 2018-04-26 10:38 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1755479
Title:
Cortex M:qemu abort with optimized code and icount
Status in QEMU:
Fix Released
Bug description:
A basic program runs fine if compiled with flag -O0 with gcc, but triggers a qemu abort when compiled with -O1 and run with icount:
"qemu: fatal: IO on conditional branch instruction"
I also noticed the problem on C source like this with -O0:
"int foo = *bar; bar++;" : OK
"int foo = *bar++;" : FAIL (!!!)
Optimized binary attached to this ticket.
command line:
qemu-system-arm -M lm3s6965evb -nographic -kernel hello.bin -serial file:$(tty) -icount 4 -cpu cortex-m4
(working fine without icount)
version:
QEMU emulator version 2.11.50 (v2.11.0-2146-gd9bbfea-dirty)
Compilation options:
./configure --target-list=arm-softmmu --disable-slirp --disable-blobs --disable-docs --disable-guest-agent --disable-gnutls --disable-nettle --disable-gcrypt --disable-sdl --disable-gtk --disable-vnc --disable-virtfs --disable-mpath --disable-xen --disable-brlapi --disable-curl --disable-bluez --disable-kvm --disable-hax --disable-hvf --disable-whpx --disable-rdma --disable-vde --disable-netmap --disable-linux-aio --disable-cap-ng --disable-attr --disable-vhost-net --disable-spice --disable-rbd --disable-libiscsi --disable-libnfs --disable-smartcard --disable-libusb --disable-live-block-migration --disable-usb-redir --disable-lzo --disable-snappy --disable-bzip2 --disable-seccomp --disable-glusterfs --disable-tpm --disable-libssh2 --disable-numa --disable-libxml2 --disable-tcmalloc --disable-jemalloc --disable-replication --disable-vhost-vsock --disable-opengl --disable-virglrenderer --disable-xfsctl --disable-qom-cast-debug --disable-vxhs --disable-crypto-afalg --disable-vhost-user --disable-capstone --disable-pie --extra-cflags=-mtune=native
I have also tested previous versions:
- stock qemu-system-arm 2.5.0 from ubuntu 16.04: OK
- git version: QEMU emulator version 2.10.0 (v2.10.2-dirty): OK
- git version: QEMU emulator version 2.10.90 (v2.11.0-rc0-dirty): FAIL
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1755479/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2018-04-26 10:51 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-03-13 13:34 [Qemu-devel] [Bug 1755479] [NEW] Cortex M:qemu abort with optimized code and icount Antoine
2018-03-13 17:48 ` [Qemu-devel] [Bug 1755479] " Peter Maydell
2018-03-13 18:11 ` Antoine
2018-03-15 11:37 ` Peter Maydell
2018-03-15 14:37 ` philmd
2018-03-15 14:51 ` Peter Maydell
2018-04-10 13:50 ` Peter Maydell
2018-04-26 10:38 ` Thomas Huth
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