Hi,
Good news -- I just built a version of ICS with the current version of
linaro-gcc.
Panda build here:
http://people.linaro.org/~bernhardrosenkranzer/boot.tar.bz2http://people.linaro.org/~bernhardrosenkranzer/system.tar.bz2http://people.linaro.org/~bernhardrosenkranzer/userdata.tar.bz2
Use linaro-android-media-create as usual to install.
This is not yet a build that we can reproduce inside android-build
because I've had to cheat by swapping out linkers in a couple of
places (just using current binutils the way we normally do produces a
build that doesn't boot, using binutils built from the AOSP source
release works, but the prehistoric linker doesn't know about "dmb st",
can't link u-boot, can't link the kernel, and strangely enough can't
link some components of ICS - apparently the binaries they ship have
some extra patches in).
But the good news is that every part is built with our compiler -
there's nothing in the way of using that (aside from the code
insanities I've already fixed).
I'll work on sorting out binutils now...
ttyl
bero
Hi,
I've spent most of my time to dig into OE. First I started with OE
(classic); then realized that OE-core is where the future happens and
switched to it. I've set up a build system and got a ARM minimal image
to build that boots in QEMU *yay*. In parallel I've been reading the
manual and looked into the receipts to find out what toolchain they are
using (gcc-4_6-branch plus patches). Next step is to get the OE-core
built using the Linaro-GCC.
Regards
Ken
== This week ==
* Looked at the MIPS _unpack_d bug. libgcc.a did have a definition,
and Michael couldn't reproduce with his build, so the bug report
is now marked as Incomplete.
* Backported patch for PR 48190 to upstream 4.6 and 4.5.
* Reviewed Revital's SMS register-pressure patch.
* More on -fsched-pressure. I now have a version that I'm happy with
as far as ARM goes, in that it usually seems to produce code that is
no worse than the better of currect -fsched-pressure and current
-fno-sched-pressure. (I'm sure there's a better way of saying that.)
In some cases it is better than both.
* Continued trying to catch up on mail.
== Next week ==
* Clean up the -fsched-pressure code (it's still in its "experimental mess"
state). Try it on Power.
* Resurrect vzip and vunzp patch after Richard E said he wouldn't object.
Richard
Hi!
* Ran eembc, coremark, denbench and spec2k on the ursas with the latest of
the Linaro and FSF series. The variants used were o3-neon and
o3-neon-novect.
I first got a c++ related build error when using 4.4.x compilers, the was
error caused by symbol versioning. Michael's explanation: "We want to use
the gcc-4.4.5 libstdc++ when building and running. However, when running
c++ itself, it links in /usr/lib/libppl_c.so, which was built with the host
4.5 compiler, which needs the 4.5 libstdc++!"
The work around is to remove the LD_LIBRARY_PATH from build.mk (the
gcc-%/benchmarks.stamp target) and run the C only tests.
* Continued documentation of running benchmarks:
https://wiki.linaro.org/AsaSandahl/Sandbox/RunningBenchmark. Tips of more
efficient ways of doing things are always welcome.
* Collected the results for SPEC2K runs with "train" and "ref" data sets. I
did -o2 and -o3 runs on a panda with the two data sets. The results for -o2
and -o3 looks almost the same though. I will double check the "*build.txt"
files from the benchmark runs, and if needed do a complementary run.
Best regards
Åsa
Dear All,
I am using arch/arm/configs/vexpress_defconfig to configure and build Linux
Kernel 3.1.1
http://launchpad.net/linux-linaro/3.1/3.1-2011.11/+download/linux-linaro-3.…
and then if I booth the zImage crated on Linaro QEMU
http://launchpad.net/qemu-linaro/trunk/2011.10/+download/qemu-linaro-0.15.5…
,it works properly.
But if i enable the LPAE support in the config file, the kernel builds and
when I boot the kernel image on QEMU, it just prints the output as :
Uncompressing Linux... done, booting the kernel.
And, then it hangs ... Can anyone please tell how to fix this issue?
Looking forward to your reply.
Thanks and Regards,
Jubi
I discovered some excessive memory usage in gas recently when
defining macros. It turns out that this is a weird implementation
feature rather than a bug.
This patch has a possible fix for the issue, but I'd be interested
in people's views before I go so far as cleaning it up and
discussing it upstream.
Cheers
---Dave
Dave Martin (1):
gas: Allow for a more sensible number of macro arguments
gas/as.c | 17 +++++++++++++++++
gas/doc/as.texinfo | 9 ++++++++-
gas/hash.c | 5 +++--
gas/hash.h | 1 +
gas/macro.c | 22 +++++++++++++++++++++-
gas/macro.h | 1 +
6 files changed, 51 insertions(+), 4 deletions(-)
--
1.7.4.1
[Jubi, I'm afraid this is the second copy of this you'll see, because
you accidentally sent your reply to linaro-toolchain-request rather
than to the actual mailing list, and so my first reply was misdirected.
This reply is to the correct list address...]
On 22 November 2011 13:28, Jubi Taneja <jubitaneja(a)gmail.com> wrote:
> Thanks for your reply. Please find the response inline ..
> On Tue, Nov 22, 2011 at 6:44 PM, Peter Maydell <peter.maydell(a)linaro.org>
> wrote:
>> On 22 November 2011 13:06, Jubi Taneja <jubitaneja(a)gmail.com> wrote:
>> > But if i enable the LPAE support in the config file, the kernel builds
>> > and
>> > when I boot the kernel image on QEMU, it just prints the output as :
>> >
>> > Uncompressing Linux... done, booting the kernel.
>>
>> Does your kernel boot OK on real hardware?
>>
>> (ie, is a kernel with LPAE support expected to boot on a CPU like the
>> A9 which doesn't have LPAE?)
>
> Yes, it is expected to boot ARM Cortex A15 CPU.
The A9 and the A15 are different CPUs. QEMU currently supports
only the A9. This is why I asked if this kernel boots OK on real
Versatile Express A9 hardware.
>> Also if your config/kernel command line don't turn on earlyprintk it's
>> worth enabling this as it usually gets you better diagnostic messages
>> for early kernel boot failures.
>
> Ok, I will try to check this. But, unfortunately now I again tried enabling
> LPAE in config file and the current status is that when I boot the kernel
> image on Qemu. it simply hangs. It now don't show that message of
> Uncompressing kernel.. I am trying to debug it using gdb, but could not find
> much. Please guide me how shall I proceed ahead.
If you've turned on kernel support for the Versatile Express A15
rather than the Versatile Express A9 then this is expected behaviour:
the VE-A15 has a different memory layout and in particular the serial
ports are in a different place. So if you try to boot the kernel on
a VE-A9 system (which is what QEMU is modelling) then it will display
nothing because the kernel is trying to write to UARTs which aren't
there.
What are you actually trying to achieve here?
-- PMM
Continued looking at constant reuse optimizations, as a background task.
I've fiddled with the costs a bit more to remove false positives.
Continued benchmarking different generic tuning ideas. With each test
run taking most of a day this is slow going.
Took Michael's rootfs that is used for all the toolchain testing and
benchmarking, unpacked it, and repacked it so that it is compatible with
"linaro-media-create", then tested that I could use it to run tests on
LAVA successfully. I was hoping to use this for extra benchmarking
bandwidth, but there's a permissions problem in the LAVA website
software that means it's not yet possible to post private results to the
system, so no proprietary benchmarks yet. I can still continue
pipe-cleaning my process, and maybe run some benchmarks without actually
reporting the results (or perhaps posting them somewhere write-only).
Begun work on adding GCC support for 64-bit shifts with NEON. This is
not quite as simple as it ought to be because a) it's inefficient to
move a value to NEON registers just to do a shift, so it needs to detect
where the value is, and b) right shifts are encoded as left shift by a
negative amount, and negative shift amounts are normally considered
undefined behaviour.
RAG :
RED : None
AMBER: Worried about trunk failures with test runs. Number of
testsuite failures after the atomics merge has increased - more below.
.
Task Planned Estimated Actual
Historical
~~~~~~~
Connect 2011.q4
preparation 28/10/2011 28/10/2011
28/10/2011
Linaro Tasks
~~~~~~~~~~~~
Fully Investigate the O3
performance
regressions 31/01/2012
Writeup on the optimizations 31/12/2011
enabled with PGO
==Progress===
* Debugged the LTO failures for some time this week - not much progress.
* The bootstrap failure with trunk turned out to be the same problem
as with the CFG not being updated properly with some of the
shrink-wrap patches from Alan M . This was fixed on trunk later on
Monday.
* Tested atomics fixes but the test results are overall looking ugly .
Need to do some more debugging. Discovered GDB was broken for single
stepping in ARM atomic sequences - Filed bug report
https://bugs.launchpad.net/gdb-linaro/+bug/892008 here.
* Looked into the vmul / vmla issue for a bit - did some experiments.
Need to write these up and follow up .
=== Plans ===
* Commit the vcvt fixed point patch.
* Finish experiments with the vmla stuff and find out more about this.
* Finish debugging the LTO failures with PGO bootstrap.
* Some research into the O3 perf issues.
Absences.
* Dec 19 - 31st Dec - Tentatively booked
== GDB ==
* Ongoing work on support for cross-platform core file generation.
== GCC ==
* Investigated Launchpad bugs:
#889984 binaries: should step across helper functions
#889985 binaries: can't step out of helper functions
#890764 4.6-11.11 seems to misdetect some files as system header and
implicit extern "C"
== Misc ==
* Gave talk on Linaro at the IBM Germany Technical Expert Council
fall meeting.
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand | Phone: +49-7031/16-3727
STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk
Wittkopp
Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht
Stuttgart, HRB 243294
Sent the patch which implements register pressure estimation in SMS to
the gcc mailing list as RFC.
I looked at some of the regressions in libav and intend to continue
with that this week.
== Last week ==
* Caught up on lots of email.
* Looked into the SMS regression that Revital found. Turned out to be
caused by the ARM backend not modelling the VMLA fast accumulator path.
Need to know how the path actually works before modelling it
(the docs aren't clear).
* Continued to look at -fsched-pressure.
Richard
Summary:
* Create crosstool-ng patches and build embedded toolchain on ubuntu-8.04.4.
Details:
* Crosstool-ng patches
* Update old patches according to Michael's comments and revise them
according the guideline.
* Create patches for nls option, newlib and gdb.
* Try to build embedded toolchain on ubuntu-8.04.4. It works after
installing all the dependence libraries.
Plans:
* Upstream the patches.
* Build and test.
Thanks!
-Zhenqiang
Hi there. The 4.6-2011.10 release causes an output miscompare failure
in 175.vpr from SPEC 2000. The fault didn't exist in 2011.09 and has
cleared in 2011.11.
Does this ring a bell with anyone? Andrew, could it be related to
your widening multiplies fix?
-- Michael
Hi,
* rewrote the Android.mk of libunwind to make use of autoreconf and libtool
* finished my work on libunwind
* upgraded my Linaro Android build environment
* debugged Linaro Android build failures (#891753)
* tested backtracing on the Linaro Android 2.3.5 and 2.3.7 branches
* documented debuggerd usage on Android:
https://wiki.linaro.org/Platform/Android/DebugAndroidSystemComponents
* Debugged a linking failure of the android perflab benchmark that Andy
is seeing. Turns out that the GCC is optimizing two consecutive calls to
sinf and cosf (same angle) are optimized by the GCC to one sincosf call.
The libm provided by the benchmark is lacking sincosf. Workaround is to
use -fno-builtin-sinf -fno-builtin-cosf.
Regards
Ken
== 64 bit atomics ==
* Still fighting membase
* Cleaned up a bunch of other issues, but I'm back at an 'expiry'
issue, where the test
stores some data with a fixed expiry time and then waits until after
it should have expired,
and checks it has. Except on ARM it sometimes doesn't expire quickly
enough. I've got
enough debug now to see that the server processes view of time (which
it updates via
an event about every second) is sometimes very behind gettimeofday()'s
view of time - and
have a small test for it. This doesn't seem to happen on x86. The
good part is that it's now
a much smaller test, the bad part is that it fails rarely - somewhere
between 1/1000 and 1/100
depending on its mood.
* Looked at a few other things to see if they might use 64 bit atomics:
- spice's (as in the VNC like protocol) FAQ said it needed 64bit
atomics and didn't work
on 32bit machines due to that; but the source appears to have been
fixed for 32bit.
- Looked at boost lock-free; it does have an implementation using
gcc's __sync primitives,
however for ARM it uses a hand coded set of primitives, those are
missing the 64 bit implementation,
but the contributor of the ARM code said that the boost lock-free
author preferred
not to use the gcc primtives.
== Other ==
* Testing latest libffi rc
- Had most of my varargs for hf fix in (had missed one part of a test)
* 1 day of non-linaro work
I'm on holiday next week.
Dave
(short week, 4 days)
RAG:
Red:
Amber: we still haven't settled on engineering blueprints and schedule
for the KVM work. Proceeding with some obviously necessary bits anyway
Amber: not clear whether we can do virtio-mmio this quarter
Green:
Current Milestones:
|| || Planned || Estimate || Actual ||
||upstream-omap3-cleanup || 2011-11-10 || 2011-11-10 || ||
(still no milestones, see above)
Historical Milestones:
||add-omap3-networking || 2011-10-13 || 2011-10-13 || 2011-10-13 ||
||a15-systemmode-planning || 2011-10-13 || 2011-10-13 || 2011-09-22 ||
||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 ||
== upstream-omap3-cleanup ==
* spent a half day on this to try to get this blueprint tidied away
even if we aren't going to have much time for the later upstreaming
== other ==
* A15/KVM planning
* experimenting with getting an A15 kernel booting on Fast Model
(see https://wiki.linaro.org/LoicMinier/Sandbox/FastModels
and https://wiki.linaro.org/PeterMaydell/A15OnFastModels)
* estimated required work for doing a qemu model of a board for
one of the Landing Teams (ans: 6 man months +)
Hi,
- spent most of the week trying to reproduce regressions with vectorization
- started bringing the latest SLP feature, condition with different
types, to gcc-linaro. There are 5 patches. Merged one, started to
prepare another one.
- fixed PR 51112
Ira
Hi,
I've now put this at :
https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2011-11-15
Are there any other topics that folks want to bring up ?
The one thing worth thinking about ahead of time is if we want to
bring ahead the call by an hour to allow Michael to join at a not so
crazy hour for him. What do folks think of 9 a.m. Tuesdays /
Wednesdays UTC ?
cheers
Ramana
Hey
When building u-boot for an ARMv5T platform (versatileqemu_config), the
Ubuntu-packaged Linaro cross-toolchain isn't suitable because it
only offers an ARMv7T2 libgcc. But I'd like the build to fail when
that happens rather than silently generating an u-boot.bin which will
trigger a SIGILL when it hits the first non-ARMv5T instruction.
I heard that gcc/ld are supposed to check this, but I'm not sure how
it's supposed to work; perhaps the way u-boot does its final link
prevents this from working properly?
I tried building u-boot as follows:
make O=obj-broken \
CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm \
OPTFLAGS="-marm -march=armv5te" \
versatileqemu_config
make O=obj-broken \
CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm \
OPTFLAGS="-marm -march=armv5te" \
-j2
The final link looks like this:
UNDEF_SYM=`arm-linux-gnueabi-objdump -x /home/lool/git/denx/u-boot/obj-v-broken/board/armltd/versatile/libversatile.o /home/lool/git/denx/u-boot/obj-v-broken/api/libapi.o /home/lool/git/denx/u-boot/obj-v-broken/arch/arm/cpu/arm926ejs/libarm926ejs.o /home/lool/git/denx/u-boot/obj-v-broken/arch/arm/cpu/arm926ejs/versatile/libversatile.o /home/lool/git/denx/u-boot/obj-v-broken/arch/arm/lib/libarm.o /home/lool/git/denx/u-boot/obj-v-broken/common/libcommon.o /home/lool/git/denx/u-boot/obj-v-broken/disk/libdisk.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/bios_emulator/libatibiosemu.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/block/libblock.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/dma/libdma.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/fpga/libfpga.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/gpio/libgpio.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/hwmon/libhwmon.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/i2c/libi2c.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/input/libinput.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/misc/libmisc.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/mmc/libmmc.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/mtd/libmtd.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/mtd/nand/libnand.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/mtd/onenand/libonenand.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/mtd/spi/libspi_flash.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/mtd/ubi/libubi.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/net/libnet.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/net/phy/libphy.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/pci/libpci.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/pcmcia/libpcmcia.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/power/libpower.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/rtc/librtc.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/serial/libserial.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/spi/libspi.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/twserial/libtws.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/usb/eth/libusb_eth.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/usb/gadget/libusb_gadget.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/usb/host/libusb_host.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/usb/musb/libusb_musb.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/usb/phy/libusb_phy.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/video/libvideo.o /home/lool/git/denx/u-boot/obj-v-broken/drivers/watchdog/libwatchdog.o /home/lool/git/denx/u-boot/obj-v-broken/fs/cramfs/libcramfs.o /home/lool/git/denx/u-boot/obj-v-broken/fs/ext2/libext2fs.o /home/lool/git/denx/u-boot/obj-v-broken/fs/fat/libfat.o /home/lool/git/denx/u-boot/obj-v-broken/fs/fdos/libfdos.o /home/lool/git/denx/u-boot/obj-v-broken/fs/jffs2/libjffs2.o /home/lool/git/denx/u-boot/obj-v-broken/fs/reiserfs/libreiserfs.o /home/lool/git/denx/u-boot/obj-v-broken/fs/ubifs/libubifs.o /home/lool/git/denx/u-boot/obj-v-broken/fs/yaffs2/libyaffs2.o /home/lool/git/denx/u-boot/obj-v-broken/lib/libfdt/libfdt.o /home/lool/git/denx/u-boot/obj-v-broken/lib/libgeneric.o /home/lool/git/denx/u-boot/obj-v-broken/lib/lzma/liblzma.o /home/lool/git/denx/u-boot/obj-v-broken/lib/lzo/liblzo.o /home/lool/git/denx/u-boot/obj-v-broken/lib/zlib/libz.o /home/lool/git/denx/u-boot/obj-v-broken/net/libnet.o /home/lool/git/denx/u-boot/obj-v-broken/post/libpost.o | sed -n -e 's/.*\(__u_boot_cmd_.*\)/-u\1/p'|sort|uniq`; cd /home/lool/git/denx/u-boot/obj-v-broken && arm-linux-gnueabi-ld -pie -T /home/lool/git/denx/u-boot/obj-v-broken/u-boot.lds -Bstatic -Ttext 0x10000 $UNDEF_SYM arch/arm/cpu/arm926ejs/start.o --start-group api/libapi.o arch/arm/cpu/arm926ejs/libarm926ejs.o arch/arm/cpu/arm926ejs/versatile/libversatile.o arch/arm/lib/libarm.o common/libcommon.o disk/libdisk.o drivers/bios_emulator/libatibiosemu.o drivers/block/libblock.o drivers/dma/libdma.o drivers/fpga/libfpga.o drivers/gpio/libgpio.o drivers/hwmon/libhwmon.o drivers/i2c/libi2c.o drivers/input/libinput.o drivers/misc/libmisc.o drivers/mmc/libmmc.o drivers/mtd/libmtd.o drivers/mtd/nand/libnand.o drivers/mtd/onenand/libonenand.o drivers/mtd/spi/libspi_flash.o drivers/mtd/ubi/libubi.o drivers/net/libnet.o drivers/net/phy/libphy.o drivers/pci/libpci.o drivers/pcmcia/libpcmcia.o drivers/power/libpower.o drivers/rtc/librtc.o drivers/serial/libserial.o drivers/spi/libspi.o drivers/twserial/libtws.o drivers/usb/eth/libusb_eth.o drivers/usb/gadget/libusb_gadget.o drivers/usb/host/libusb_host.o drivers/usb/musb/libusb_musb.o drivers/usb/phy/libusb_phy.o drivers/video/libvideo.o drivers/watchdog/libwatchdog.o fs/cramfs/libcramfs.o fs/ext2/libext2fs.o fs/fat/libfat.o fs/fdos/libfdos.o fs/jffs2/libjffs2.o fs/reiserfs/libreiserfs.o fs/ubifs/libubifs.o fs/yaffs2/libyaffs2.o lib/libfdt/libfdt.o lib/libgeneric.o lib/lzma/liblzma.o lib/lzo/liblzo.o lib/zlib/libz.o net/libnet.o post/libpost.o board/armltd/versatile/libversatile.o --end-group /home/lool/git/denx/u-boot/obj-v-broken/arch/arm/lib/eabi_compat.o -L /usr/lib/gcc/arm-linux-gnueabi/4.6.1 -lgcc -Map u-boot.map -o u-boot
I verified that all the .o files passed above have Tag_CPU_name:
"5TE" in their arm-linux-gnueabi-readelf -A output; the only
problematic file is -lgcc.
Note that the final link is done with arm-linux-gnueabi-ld and doesn't
set any architecture; I changed it manually to use gcc and pass the
-marm -march=armv5te, and had to set -nostdlib too when using gcc:
arm-linux-gnueabi-gcc -marm -march=armv5te -nostdlib -pie -T /home/lool/git/denx/u-boot/obj-v-broken/u-boot.lds -Bstatic -Ttext 0x10000 $UNDEF_SYM arch/arm/cpu/arm926ejs/start.o -Wl,--start-group api/libapi.o arch/arm/cpu/arm926ejs/libarm926ejs.o arch/arm/cpu/arm926ejs/versatile/libversatile.o arch/arm/lib/libarm.o common/libcommon.o disk/libdisk.o drivers/bios_emulator/libatibiosemu.o drivers/block/libblock.o drivers/dma/libdma.o drivers/fpga/libfpga.o drivers/gpio/libgpio.o drivers/hwmon/libhwmon.o drivers/i2c/libi2c.o drivers/input/libinput.o drivers/misc/libmisc.o drivers/mmc/libmmc.o drivers/mtd/libmtd.o drivers/mtd/nand/libnand.o drivers/mtd/onenand/libonenand.o drivers/mtd/spi/libspi_flash.o drivers/mtd/ubi/libubi.o drivers/net/libnet.o drivers/net/phy/libphy.o drivers/pci/libpci.o drivers/pcmcia/libpcmcia.o drivers/power/libpower.o drivers/rtc/librtc.o drivers/serial/libserial.o drivers/spi/libspi.o drivers/twserial/libtws.o drivers/usb/eth/libusb_eth.o drivers/usb/gadget/libusb_gadget.o drivers/usb/host/libusb_host.o drivers/usb/musb/libusb_musb.o drivers/usb/phy/libusb_phy.o drivers/video/libvideo.o drivers/watchdog/libwatchdog.o fs/cramfs/libcramfs.o fs/ext2/libext2fs.o fs/fat/libfat.o fs/fdos/libfdos.o fs/jffs2/libjffs2.o fs/reiserfs/libreiserfs.o fs/ubifs/libubifs.o fs/yaffs2/libyaffs2.o lib/libfdt/libfdt.o lib/libgeneric.o lib/lzma/liblzma.o lib/lzo/liblzo.o lib/zlib/libz.o net/libnet.o post/libpost.o board/armltd/versatile/libversatile.o -Wl,--end-group /home/lool/git/denx/u-boot/obj-v-broken/arch/arm/lib/eabi_compat.o -L /usr/lib/gcc/arm-linux-gnueabi/4.6.1 -lgcc -Wl,-Map u-boot.map -o u-boot
But this command works and produces an u-boot ELF which has
Tag_CPU_name: "7-A".
How would I break the build when libgcc isn't ARMv5T?
Thanks,
--
Loïc Minier
Spun Linaro GCC 4.6 release tarball, uploaded it to Michael's server,
and launched the testing.
Continued work on constant reuse optimization. I've now eliminated some
more false positives caused by inconsistent rtx_cost results. It turns
out the pass also fixes up inefficient constants generated by
arm_split_constants, which is nice.
Set yet more spec benchmark runs going as part of the generic tuning
investigation.
Other:
Half day Monday to recover from the weekend's travel.
Half day on internal Mentor activities.
== GDB ==
* Worked on support for cross-platform core file generation.
After some discussion on the mailing list it seems we've
come to an agreement that the remote protocol ought to have
two separate packets related to memory layout, one that
describes the permanent, system-wide layout (for embedded
systems) and one that describes the dynamic, per-process
layout (for processes with memory-mapped files). The latter
also ought to be integrated with the "info proc mappings"
command, which should work with gdbserver too.
I've been working on updating the patches accordingly.
== GCC ==
* Patch review week.
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand | Phone: +49-7031/16-3727
STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk
Wittkopp
Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht
Stuttgart, HRB 243294
Testing the SMS register pressure estimation on libav micro benchmarks
and eembc.
Discussed with Ayal the implementation. He had some ideas to consider
regarding the it.
Looking into the regressions of SMSed kernels in libav which are not
related to register pressure:
Consulting with Ayal regarding the case in dsputil-ssd_int8_vs_int16_c
where we have severe regression with SMS; it seemed that the
regression was due to dependence between accumulations that can be
avoided, more specifically we had the following case in vector code:
vec1 = vec1 + ...
...
vec1 = vec1+ ...
...
vec1 = vec1+ ...
...
vec1 = vec1+...
to resolve this, I implemented a hack similar to MVE optimiation in
the loop-unroller as follows:
vec1 = vec1 + ...
...
vec2 = vec2+ ...
...
vec3 = vec3+ ...
...
vec4 = vec4+...
This gives ~4.5% improvements to the non-SMSed version. The SMS
version now shows no regression as the problematic loop which caused
the regression now failed to be SMSed and I'm looking into the reason.
Another regression showed in idct-internal-8 is apparently related to
the do-loop optimziation (SMS actually failed to be applied in this
loop). when applying the patch to expand SMS to recognise doloop then
the regression is resolved.
(http://gcc.gnu.org/ml/gcc-patches/2011-09/msg02051.html; patch is not
in mainline yet)
Summary:
* Add expat and ncurses support for gdb-cross.
* Rebase and create patches for crosstool-ng upstream.
* Compare configurations difference between crosstool-ng and embedded toolchain.
Details:
* Add expat and ncurses support for gdb cross. At this time, all the
packages can be built for both Linux and Mingw32 host with baremetal
target.
* Rebase and create patches for crosstool-ng upstream. Patches are
sent to Michael for review.
* Compare configurations difference between crosstool-ng and embedded
toolchain. To align the configuration, crosstool-ng
* need (not necessary) --disable-nls for companion libs.
* need make document.
* need add --enable-newlib-register-fini config and enhance
CFLAGS_FOR_TARGET for newlib.
* need --disable-sim for gdb.
* need multilib support (Can workaround for current implementation.
Need improvement when it is fully supported).
Thanks!
-Zhenqiang
