- linaro-toolchain - lists.linaro.org

[Activity] Week ending 2011-08-12

by Ramana Radhakrishnan

== GCC == === Progress === * Linaro sprint last week - one day of fun with broken laptop. * Looked at how we could get BUILTIN_VECTORIZE_CONVERT work to allow vectorizing some of the floating point conversions. * Fixed PR50022 . Couple of iterations. * Internal training for 2 days. * Dusted off a couple of my old patches and sent them out after testing. * Next to get back to old VFP and ivopts patch. * Looked at a testfailure with -mvectorize-with-neon-quads with Ira . === Plans === * Continue to look at the test failure with mvectorize-with-neon-quad * Finish off optimize_size patch based on comments. * finish off case for handling tbh instrucitons. * Commit fix for PR50022 * Look at some of the issues with VFP moves and try and get forward with it. * Look at BRANCH_COST results. Meetings: * 1-1s * TCWG calls * GNU Toolchain planning meeting. * Some patch review and bugzilla triaging. Absences. * 1st Aug - 5th August - Linaro sprint. * 8th - 9th August - Internal training. * 29th Aug - Sept. 2 - Holiday booked and approved. * 31st Oct - 4th Nov - Linaro Summit Orlando - Travel to be booked.

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Looked a bug report that the fix for LP #736007 had caused regressions on powerpc-darwin. It turned out to be a target-specific bug; the backend has the same const_vector code as i386 and spu, but the fix for PR34856 was never applied there. I'll submit the patch (and backport to Linaro 4.6) once the bug submitter has had a chance to test it. * Experimented with -falign-loops. Found that it triggered a bug in the ARM minipool layout code. Posted patch upstream and committed. Backported to 4.6. * Committed patch to allow globs in define_bypass. * Updated auto inc/dec patch after comments from Bernd and Stephen. I'm pretty happy with it now, but there are a couple of prerequisite patches I need to sort out first. * Started getting those prerequisites ready. * Decided that we needed something a bit more subtle than my original insn_rtx_cost patch: at the moment, we simply don't use rtx costs for lvalues. Wrote a series of patches to "improve" the rtx_cost interface, including providing the outer operand number and an indication of whether the rtx is an lvalue or an rvalue. * Upgraded my laptop. This turnted out to be more eventful than anticipated, and ended up taking a whole day. == Next week == * Post auto inc/dec preparatory patches for review. Hopefully post an RFA for the pass itself. Richard

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[ACTIVITY] weekly status

by Ken Werner

Hi, * worked on getting the remote unwind support for ARM upstream * noticed when building a recent android image of the linaro_android_2.3.4 branch for the panda the init.rc attempts to mount wrong partitions * tracked down the commit and opened a bug * linaro android team fixed it real quick * started to integrate libunwind into Andriod * two issues here: - the build system requires an Android.mk (while libunwind is autoconf+libtool based) - libunwind uses some interfaces/headers that are not provided by the bionlic libc Regards Ken

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Re: What are the chances of a phone based developer image

by Christian Robottom Reis

On Thu, Aug 04, 2011 at 12:03:00PM -0700, Taras Glek wrote: > Recently we have been looking at how to squeeze more performance out > of our toolchain for building Firefox on Android. Mike Hommey > integrated GCC 4.6 into the android NDK and has been testing > performance (with mixed results > http://gcc.gnu.org/ml/gcc/2011-08/msg00096.html). You should definitely be trying to build using the Linaro 4.5 and 4.6 compiler branches; they are pretty much guaranteed to give you better performance, and if they don't, we're on the hook to fix it quickly! All the patches go upstream, so there is no risk of you being stuck on a fork -- it just makes everything you need available right now. I'm copying the linaro-toolchain list to make sure that you get the right people's attention (though if they weren't all coming back from Connect in Cambridge this week they would have picked the email up already). > I like how Linaro is doing regular arm benchmarking, ie > https://wiki.linaro.org/Platform/Android/AndroidToolchainBenchmarking/2011-… We do much more than that, but it's not as easy to find right now; for instance http://ex.seabright.co.nz/helpers/benchcompare is Michael's regular release benchmark. > . Would you be interested in adding a Firefox-based benchmark? As a > large application it is a good testbed for LTO, FDO and other > aggressive optimizations. Totally. Let's do it. Can you give me an idea of what boards you are testing the build on today? Do you have a test suite that we could run in a reasonable timeframe (hours, not days)? > We are also looking at setting a developer-friendly android ROM with > oprofile, perf, systemtap, gdb, debug symbols, etc. It might even be > beneficial for us to use newer kernels as we exlore options like > kernel-assisted ld.so relocations, etc. That seems to similar to > what Linaro provides in the evaluation ROMS. Is there any chance of > Linaro providing developer-friendly "evaluation" ROMs for retail > phones like the Nexus S? It's indeed pretty similar (we just call them LEBs), and Zach will be really interested in working with you on this. As for supporting actual released phones, it lies somewhat outside of our optimal operating model, and we don't have any hardware available. I guess we could do a spin for a specific model if we had enough of them to use by a set of engineers in the different teams. They are so expensive, though. Do you guys have lots of them? -- Christian Robottom Reis, Engineering VP Brazil (GMT-3) | [+55] 16 9112 6430 | [+1] 612 216 4935 Linaro.org: Open Source Software for ARM SoCs

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Change in Linaro Toolchain naming

by Michael Hope

Hi there. This is a heads-up that the name of the Toolchain group releases will change slightly with next weeks release. We're dropping the respin suffix (the -0) to line up with the new whole of Linaro naming convention. What was: gcc-linaro-4.6-2011.xx-0.tar.bz2 gdb-linaro-7.2-2011.xx-0.tar.bz2 qemu-linaro-0.15-2011.xx-0.tar.bz2 will now be: gcc-linaro-4.6-2011.xx.tar.bz2 gdb-linaro-7.2-2011.xx.tar.bz2 qemu-linaro-0.15-2011.xx.tar.bz2 Earth shattering, eh? I've taken the opportunity to write up our naming convention at the same time: https://wiki.linaro.org/WorkingGroups/ToolChain/Naming -- Michael

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Re: RFC: Saving and restoring the assembler state during assembly

by Richard Sandiford

Dave Martin <dave.martin(a)linaro.org> writes: > However, there's not really anything fundamentally > architecture-specific about this problem, and ideally the solution and > the directives should not be architecture-specific either. > One option which appeals to me is to have some directives which can > exist across all architectures, and do something analogous to what > .set push and ,set pop do on MIPS. FWIW, this sounds like a really good idea to me. I won't argue about the syntax (I have no particular preference). > I feel that the environment should also include global, > target-independent state such as the current macro mode (.altmacro > versus .noaltmacro) and current ELF section stack state, but not > symbols or macro definitions themselves. Sounds reasonable. To state the obvious, we'd have to make the existing target-dependent groupings (like .set push/pop on MIPS) work with this new scheme, but those directives musn't affect this extra target-independent information. So the new directives would interact with both the traditional .pushsection and the traditional target-dependent directives, even though those two features would otherwise remain independent. That is, .pushsection and .set push/pop operate on conceptually separate stacks whoses pushes and pops can be freely mixed. But .pushsection and the new directives would need to be strictly stacked; pops must have the same form as their corresponding pushes. Combinations of .set push/pop and the new directives would also need to be strictly stacked. Nothing a bit of code can't handle though. Richard

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RFC: Saving and restoring the assembler state during assembly

by Dave Martin

Hi all, On ARM, we've now hit the problem a few times of temporarily overriding the assembler state (or rather, not being able to do this reliably). For example, sometimes there's a need to assemble a few instructions for a different architecture version so we can optionally execute or skip them at run-time is not really possible at present. This sort of feature is especially useful in macros but can be useful elsewhere too. There seem to be some target-specific solutions to this problem already. MIPS has its "option stack", maintained by .set push and .set pop directives. From the documentation, it sounds like this saves/restores a somewhat comprehensive set of state, but doesn't make much syntactic sense on arches which use .set to define symbols (i.e., most arches). PowerPC also has .machine push and .machine pop, but those only act on one specific aspect of the assembler state, and therefore aren't as portable a concept. However, there's not really anything fundamentally architecture-specific about this problem, and ideally the solution and the directives should not be architecture-specific either. One option which appeals to me is to have some directives which can exist across all architectures, and do something analogous to what .set push and ,set pop do on MIPS. My names would be .pushenv and .popenv, but obviously, they can be named any way people like. (For now I'm stealing groff's "environment" terminology to refer to such saved and restored state -- hence "env". Again, the nomenclature is arbitrary.) These directives would save and restore a target-specific set of state, which the philosophy that anything that can reasonably be changed with a directive mid-file can also be saved and restored with .pushenv/.popenv. Effectively, .popenv would be equivalent to issuing the necessary set of assembler directives to restore the assembler state to whatever it was at the last .pushenv (including the state of the environment stack itself) I feel that the environment should also include global, target-independent state such as the current macro mode (.altmacro versus .noaltmacro) and current ELF section stack state, but not symbols or macro definitions themselves. Currently, neither the macro mode nor the behaviour of .previous is reliably restorable after being changed (unless I missed something). This can result in unexpected behaviour after a macro which switches sections or changes the macro mode. This seems unfortunate since on most arches there is no syntactic difference between a machine instruction and a macro invocation -- hence in the presence of macros, the only time you're really 100% certain what .previous will do is immediately after a .pushsection or .section directive (which obviously is not much use). Comments are welcome -- at the moment this is just a fuzzy idea for a feature which might prove useful. I haven't investigated the implementation implications -- maybe it could be built straightforwardly around the current MIPS directives. Cheers ---Dave

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[ACTIVITY] August 7-11

by Ira Rosen

Hi, * fixed PR 50014 and 50039 - to be backported to linaro-gcc * tested the patch to change the default vector size on NEON * found one test that fails with quad-words - gcc.c-torture/execute/mode-dependent-address.c. Debugging it with Ramana. * started looking into widening shifts Vacation plans: next week Monday and Wednesday and August 22 - 30. Ira

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ld in current (4.6-2011.07-0-8-2011-07-25_12-42-06) toolchain fails to link uboot

by Bernhard Rosenkranzer

Hi, ld in the current (4.6-2011.07-0-8-2011-07-25_12-42-06) Android toolchain fails to link uboot: arm-eabi-ld: /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/libgeneric.o: Unknown mandatory EABI object attribute 44 arm-eabi-ld: failed to merge target specific data of file /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/crc16.o arm-eabi-ld: /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/libgeneric.o: Unknown mandatory EABI object attribute 44 arm-eabi-ld: failed to merge target specific data of file /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/crc32.o arm-eabi-ld: /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/ctype.o: Unknown mandatory EABI object attribute 44 arm-eabi-ld: failed to merge target specific data of file /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/ctype.o arm-eabi-ld: /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/div64.o: Unknown mandatory EABI object attribute 44 arm-eabi-ld: failed to merge target specific data of file /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/div64.o arm-eabi-ld: /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/errno.o: Unknown mandatory EABI object attribute 44 arm-eabi-ld: failed to merge target specific data of file /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/errno.o arm-eabi-ld: /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/ldiv.o: Unknown mandatory EABI object attribute 44 arm-eabi-ld: failed to merge target specific data of file /mnt/user/bero/android-iMX53-20110716151649/out/target/product/iMX53/obj/u-boot/lib/ldiv.o I believe this is already fixed in upstream binutils (or at least in hjl's 2.21.52.0.2 release from kernel.org /pub/linux/devel/binutils). ttyl bero

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tomorrow's call cancelled.

by Ramana Radhakrishnan

Given I'm away at some internal training and we had one last week . I decided to cancel this. Ramana

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[ACTIVITY] report week 31

by Peter Maydell

RAG: Red: Amber: OMAP3 patch upstreaming is slower progress than hoped Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro 2011-08 || 2011-08-18 || 2011-08-18 || || Historical Milestones: ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || 2011-07-21 || == upstream-omap3-patches == * discussion with upstream about how best to model omap-gpmc as qdev == other == * Attended Linaro Connect Q3.11 * submitted some patches which fix minor bugs that were preventing the QEMU M3 model from booting the Keil example binary images * miscellaneous upstream patch review Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 9, 10 August: manning Linaro demo stand at APM 15-19 August: KVM Forum and LinuxCon NA, Vancouver

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[ACTIVITY] Weekly status

by Richard Sandiford

== Last week (Linaro Connect) == * Reran libav comparisons after Ira's fix for excessive promotion. The vectorized versions are now at least as good as the non-vectorised ones. Updated wiki page with new asm output and microbenchmark results. * More work on SMS. I have some patches that wire up the ddg code to IV analysis. It gave some nice benchmark improvements, but also some regressions. Traced the regressions down to cases where the schedule for small iis generated too many moves. E.g. in a small microbenchmark, we were able to schedule 6 instructions with an ii of 3 (i.e. in a loop iteration of 3 cycles), but then needed to add ~9 moves in order to keep the dependencies correct. We got much better code with a larger ii and fewer moves. Wrote a patch to estimate how many moves would be added, and to try to a larger ii if the number of moves is too high. This improved the results for one benchmark independently of the iv patch, and had no effect on the others. Discussed this with Revital, who said that Mustafa had tried a similar thing but seen no benefit. * Got powerpc-ibm-aix5.3 bootstraps working. Needs a few local fixes due to C++ bootstrapping. Used it to test a couple of preparatory patches for the IV work. Submitted those patches upstream. * Ran benchmarks with -fno-schedule-insns after seeing that the first scheduling pass was responsible for the main NEON-vs.-non-NEON regression in EEMBC. It fixed that case, but as expected, made others worse. Mentioned this to Ramana, who pointed me at -fsched-pressure. Reran the benchmarks with -fsched-pressure instead of -fno-schedule-insns. It too fixed the main regression, and improved a couple of other tests too. It showed a regression in another test though. Looked at that regression. It was a case where many registers were live across a loop, but not used in it. This was causing the loop to have a very conservative schedule. It would be better to spill some of the other registers instead. Wrote a patch to take loops into account, and it seemed to do the right thing for EEMBC. Sent it to Andreas, after Ulrich mentioned that he had been looking at -fsched-pressure problems on s390. Andreas is away for a while, though, so I might put this on the back burner until he gets back. == This week == * SMS * auto inc/dec * libav, perhaps Richard

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[ACTIVITY] Aug 1-5

by Ira Rosen

Hi, * committed upstream a patch that reduces over-promotion of vector operations * started to work on a new version of the patch to change the default vector size for Neon * attended Linaro connect Ira

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[ACTIVITY] Weekly status

by Revital Eres

* Committed a set of SMS patches to trunk and gcc-linaro branch. * Implemented a hack to evaluate the potential of SMS on SPEC2006/libqauntum. * involved in non linaro issue

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[ACTIVITY] 2011-08-05

by David Gilbert

== QEMU == * After discussion with Peter started writing QEMU fixup for 64bit atomic helper version location. * Sent fixes for soc-dma code to qemu list * Trying to understand just how much of omap_dma's code is needed. == Other == * Travelling to/from connect * Wanted to dial into some of the seessions in Corpus and Magdelen rooms but the remote audio from them was unusable. Dave

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[ACTIVITY] weekly status

by Ken Werner

Hi, Libunwind: * finished initial ARM support for remote unwinding (libunwind-ptrace) Android: * took a closer look at the debuggerd * got the perflab benchmark running on my PandaBoard using Linaro GCC Misc: * remotely attended some Linaro Connect Android sessions Regards Ken

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[ACTIVITY] Aug 1 - Aug 5

by Ulrich Weigand

== GDB == * Created Linaro GDB 7.3 branch * Ported all remaining feature patches from Linaro GDB 7.2 * Backported mainline patches to fix remote test issues: - Fixed #804387 Shared library test problems - Fixed #804392 Rebuilt executables not copied - Fixed #804396 Spurious failures * Committed mainline patch to fix dlopen test cases for remote testing (#804387). * Committed mainline patches to fix misc. other remote test problems (#804396). == Misc == * Attended Linaro Connect in Cambourne. 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

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libav wiki page updated for current FSF trunk

by Richard Sandiford

I've updated: https://wiki.linaro.org/RichardSandiford/Sandbox/NeonLibAv so that it gives the output for current trunk, including Ira's commit yesterday to reduce the amount of overpromotion. I also reran the microbenchmarks. The good news is that the vectorised code is now better in all cases than the non-vectorised code. The biggest winner from last time was rgb24tobgr16_C(). It used to be much worse with vectorisation due to lots of excessive widening. Thanks to Ira's patch, the loop now looks pretty respectable, and is ~3.25x faster than the non-vectorised code. As well as using a more recent compiler, the new version also uses -mvectorize-with-neon-quad. Once again it shows a significant improvement over the default. Richard

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QEMU futures

by Michael Hope

Hi there. We had a brainstorm this afternoon about areas QEMU could go into in the future. My pigeon-scratchings are at: https://wiki.linaro.org/WorkingGroups/ToolChain/Q3.11/QEMUFutures See also: https://wiki.linaro.org/MichaelHope/Sandbox/RoadmapIdeas#QEMU_everywhere -- Michael

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[ACTIVITY] 25th - 31st July

by Andrew Stubbs

Continued work on widening multiplied. I've identified another cause for the bootstrap failure, and submitted the new version for testing. Continued trying to find out how my thumb2 constants patches are broken. This is taking ages due to the time it takes to turn around a bootstrap build on my IGEP board. Tried to get the CS Panda boards to work again. They'll do the bootstrap builds much faster (if still not quickly), but are no longer very well. All my attempts to bring them back up remotely have failed. I've discovered that the device the serial console on one was connected to has been relocated to the new Mentor Graphics board lab, so this might explain some of it .... Chaired the Monday and Thursday meetings in Michael's absence. Travelled to the Linaro Connect event in Cambourne, near Cambridge. Other: More machine trouble. I keep thinking I have the display issues solved, and then it starts up with all the windows displayed double sized, but requiring mouse clicks in the correct location .... typically this happened just when I needed access to the pin number for the Monday meeting. This hasn't happened since Monday, so hopefully it's now ironed out ... this sort of thing does not happen with Windows. :( ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html

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[ACTIVITY] Weekly status

by Revital Eres

* Looking into SMS patches sent to mainline which expands SMS functionally to avoid using doloop. The patches resolve the recent bootstrap failure on mainline. http://gcc.gnu.org/ml/gcc-patches/2011-07/msg01807.html * Continue looking into 462.libquantum.

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Using valgrind with linaro toolchain

by Diane Holt

Valgrind wants a less stripped ld-2.12.1.so or it won't work. The build process (that Michael Hope put together) just downloads the libc6_2.12.1-0ubuntu6_armel.deb, and the ld-2.12.1.so in there is fully stripped. I thought I'd be able to just get the libc6-dbg_2.12.1-0ubuntu6_armel.deb instead, thinking that was just the pre-stripped version of these libs -- but apparently it's not, because trying to use those libs instead of the stripped ones results in undefined symbols. For example, ld-2.12.1.so defines _rtld_global -- but libc-2.12.1.so is looking for _rtld_global@@GLIBC_PRIVATE, so _rtld_global@@GLIBC_PRIVATE ends up undefined. (Ditto for __tls_get_addr, __libc_enable_secure, _dl_argv, etc.) I'm not sure who actually builds these packages (they're retrieved from: http://ports.ubuntu.com/pool/main/e/eglibc/), but if anyone has any suggestions on how to get past this, I'd be most appreciative. (I've got angry developers trying to track down memory issues, who about to come after me with torches and pitchforks :P ) Thanks, Diane

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[ACTIVITY] Jul 25 - Jul 29

by Ulrich Weigand

== GDB == * Committed second mainline patch to fix re-built executable remote test problems (#804392). * Prepared for rebasing Linaro GDB on top of GDB 7.3 release. == Misc == * Prepared for Linaro Connect. 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

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[ACTIVITY] weekly status

by Ken Werner

Hi, * Monday was full of IBM internal meetings * Android * got a self built LEB and generic version 2.3.4 of linaro android running on my pandaboard (build with the gcc 4.6 07 release plus the patch that Richard made) * requires libicui18n.so (external/icu4c/i18n) to be built with -O2 * ran into a few issues (816491, 807230) * libunwind: * simplified the local unwinding (there is no need to touch the ARM exidx table segment when looking it up) * fixed a bug (corner case: the info of the IP to be unwound is described by the last unw entry) * made some progress on the remote unwinding via ptrace * remotely searching the unw withing entry exidx table segment * next step is to remotely extract the unw isns Regards Ken

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[ACTIVITY] report week 30

by Peter Maydell

RAG: Red: Amber: OMAP3 patch upstreaming is slower progress than hoped Green: various outstanding patches accepted upstream in time for 0.15 Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro 2011-08 || 2011-08-18 || 2011-08-18 || || Historical Milestones: ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || 2011-07-21 || == upstream-omap3-patches == * omap-gpmc patches now all cleaned up; I think I need to look at qdevifying this device before submitting patches, though * sent patch for bug which makes n810 model crash when key is pressed * sent a pull request collecting together the patches submitted so far == other == * qemu 0.15: put together pull request for ARM patches I think should go into this release; wrote ARM-related bits of the release notes * helped GSoC student track down a bug causing android not to boot * LP:816791: tracking down issues with running mono under qemu (combination of a couple of known qemu bugs and a mono bug) * admin/prep for upcoming travel (cambourne, vancouver, orlando) * reviewing pl041 patches which add audio support to versatilepb and vexpress models * mailing list discussion of possible new qemu object model * lots of meetings this week (toolchain, standup, doughnuts, team comms x2) Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 15-19 August: KVM Forum and LinuxCon NA, Vancouver

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multilib'd (softfp/hardfp) gcc available in Ubuntu oneiric

by Matthias Klose

the current gcc-4.6/eglibc is now built multilib'd for -mfloat-abi=softfp|hard, including the GCC runtime libraries. I hope that the gcc cross builds will pick this up soonish, not needing to build the cross compiler twice for softfp and hard float-abi. Matthias

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[ACTIVITY] 2011-07-29

by David Gilbert

== 64 bit atomics == * Sent updated set of 64bit atomic patches to gcc list with fixes from previous review * Started hunting for other users of 64bit atomics than membase jemalloc, sdl and boost lock free look like possibilities; but I've not looked at them hard yet == QEmu == * Released fix for last SD card block access error - Vincent Palatin released a bunch of SD card fixes a few hours later - that included a fix to the same bug; however it does look like he has a bunch of other stuff we should keep sync'd with. * Changing caching mode to writeback on the block layer fixes bug 732223 (hangs on heavy IO) - goes from 130KB/s to 8MB/s on vexpress - Asked mailing list whether that's reasonable to make as default for SD * Looking at path from CPU->MMC/SD card - the DMA on OMAP is pretty inefficiently emulated, but the soc_dma code has an unused special case for dma'ing to hardware, looks promising but need to figure out how to use it and if it works. * Comparing Vincent's SD card patch with earlier meego patches; partial overlap. == Other == * Pinged libc-ports for comments on my optimised memchr patch * Image testing Next week; I intend to be in Camborne on the afternoon of Monday, Wednesday and Friday. Dave

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[ACTIVITY] July 24-28

by Ira Rosen

Hi, I am checking the coverage of the NEON instructions mostly by writing tests in C to check which instructions are generated (after auto-vectorization) and which are not. I put here https://wiki.linaro.org/IraRosen/Sandbox/InstructionCoverage the list of things that I've checked till now. Ira

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[ACTIVITY] 18th - 22nd July

by Andrew Stubbs

Spun release tarballs for Linaro GCC 4.5 and 4.6. Sent them to Michael Hope and Matthias Klose. Testing for my widening multiplies patches revealed a bug when the accumulate value had a different type. The problem is easily fixed, so I've created a patch, submitted it, and now it's approved upstream. Same again, this time with a bug involving constant integers. Again, easily fixed, submitted, and approved. Nobody had reviewed the first patch in my series - Richard Guenther had reviewed all the others, but wasn't happy to review the expand pass. So, I asked newly crowned RTL Maintainer Richard Sandiford to review it, but apparently it's the wrong bit of the back-end, so I asked Bernd instead. Bernd kindly reviewed and approved it, so now the whole series is ready to commit if only my test comes back clean. Continued trying to figure out why my thumb2 constants patch is broken. So far, no further progress. It might be that Michael's build system is confused, but it's looking likely to be a real bug. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html

14 years, 1 month

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[ACTIVITY] Weekly status

by Revital Eres

- Opened PR49789 to record the bootstrap failure with SMS flags. - SPEC2006/libquantum: Wrote a hack to apply SMS on the hot loop. Need to make it more accurate. - Pinged SMS patches in mainline. - Looking with Ramana on the effect of the Tree reassociation improvement patch on bwaves http://gcc.gnu.org/ml/gcc-patches/2011-07/msg00904.html

14 years, 1 month

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[ACTIVITY] 2011-07-22

by David Gilbert

== 64 bit atomics == * Updated gcc patches as per comments from Ramana and Joseph; build currently cooking on Panda == Qemu == * Testing Peter's pre-release, finding bug on beagle (that he tracked down to x-loader change) * Found cause of occasional SD card errors I was seeing (SD: CMD12 in a wrong state); I'll cut a patch next week, but the bug is writing the last sector throws an error and also leaves it in the wrong state * Added a bunch of tracing code to the SD card layer * With the tracing code and fixing the other bug I'm starting to understand how it works - and half a dozen reasons that the emulation is really slow; whether that's the cause of the reported recoverable lock ups under load is an interesting question; I plan to fix the obvious problems and see how it goes. Dave

14 years, 1 month

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[ACTIVITY] Jul 18 - Jul 22

by Ulrich Weigand

== GDB == * Committed mainline patch to fix re-built executable remote test problems (#804392). * Committed two more mainline patches to fix remote test issues. == GCC == * Patch review. * Determined root cause of bug #809768 (ICE in bionic libm). 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

14 years, 1 month

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[Activity] Week ending 22 July 2011.

by Ramana Radhakrishnan

== GCC == === Progress === * ivopts patch to minimise the amount of VFP moves to integer registers because of auto-inc - sent out for review. It appears to test fine and reduces the number of FP to integer moves in certain SPEC2k6 benchmarks by about 20% * More cases with vfp moves identified and some more patches coming out soonish. one-case where we have moves from VFP regs to integer regs because we allow POST_MODIFY_DISP. and another case from scimark where we have a case with moves from integer registers to VFP registers because I suspect the order of constraints in movdf_vfp has integer registers before fp registers while the movsf_vfp doesn't . * Panda died a couple of times again because of power glitches in the office - restarted runs for BRANCH_COST. * Sorted out travel plans for UDS orlando. Need to book tickets. * Sometime spent on getting the Eagle boards working. * Bug triage and some patch review. === Plans === * Benchmark the ivopts patch to see what happens. * Some issues with my last patch on movdi_vfp . I think I've missed a set of ce_count and was thinking of why there was an Ada failure with things outside IT blocks There appears to be an ubuntu bug for that. * Disable POST_MODIFY for VFP mode values and see what happens and change the order of the constraints to have loads to VFP registers before loads to core registers for movdf_vfp and thumb2_movdf_vfp. * Look at effects of auto-inc-dec with the VFP mode stuff. * Look at EPILOGUE_USES and clear more of my patch queue. Meetings: * 1-1s * TCWG calls Absences. * 1st Aug - 5th August - Linaro sprint. * 8th - 9th August - Internal training. * 29th Aug - Sept. 2 - Holiday booked and approved. * 31st Oct - 4th Nov - Linaro Summit Orlando - Travel to be booked.

14 years, 1 month

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[ACTIVITY] report week 28

by Peter Maydell

RAG: Red: Amber: OMAP3 patch upstreaming is slower progress than hoped Green: various outstanding patches accepted upstream in time for 0.15 Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || 2011-07-21 || Historical Milestones: ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == linaro-qemu-11.11 == * tracking down a problem with very recent beagle snapshots not booting in qemu; this turns out to be an x-loader bug (LP:813407) * made the release == other == * upstream are planning to branch for 0.15 release today * most of the outstanding ARM patches have now been pulled * reviewed a patch adding ARM1176 support * wrote a patch fixing the feature flags for ARM1136r1 so it includes the TLS registers (needed as newer kernels now try to use them) * submitted some patches fixing a few VFP UNDEF/UNPREDICTABLE cases so they don't crash qemu * submitted patch to make v6 cp15 barrier insns work in linux-user mode * looked at a reported problem where linux kernel versions 2.6.39+ display graphics wrongly. This turns out to be that 2.6.39 (or 38) changed (inadvertently?) from programming the versatilepb CLCD as RGB565 to setting it to BGR565; qemu wasn't implementing the latter. Dusted off some PL111 support patches, added the mux control support for PL110 and submitted them. Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 15-19 August: KVM Forum and LinuxCon NA, Vancouver

14 years, 1 month

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Wrote a fix for 809768. Accepted upstream. * Looked at upstream PR 49742 (the failures seen with predictive commoning). Accepted upstream. * More shrink-wrap review. * Sent auto-inc-dec changes out for comments. Got some good private feedback (in the sense of being positive, and having good suggestions). * Sent a related define_bypass patch out for review. * Started looking at sms-and-memory-dependencies. == Next week == * Deal with auto-inc-dec suggestions. * More SMS.

14 years, 1 month

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eglibc bug, multiple regressions on oneiric

by Mounir Bsaibes

Is there anyone handling this bug? https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/775849 Mounir -- Mounir Bsaibes Project Manager Follow Linaro.org: facebook.com/pages/Linaro/155974581091106 http://twitter.com/#!/linaroorg http://www.linaro.org/linaro-blog <http://www.linaro.org/linaro-blog>

14 years, 1 month

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Linaro GCC 4.6 and 4.5 2011.07 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of both Linaro GCC 4.6 and Linaro GCC 4.5. Linaro GCC 4.6 is the fifth release in the 4.6 series. Based off the latest GCC 4.6.1+svn175677, it adds new optimisations and vectoriser improvements. Interesting changes include: * Updates to 4.6.1+r175677 * Improves support for vector shifts by a constant * Improves handling of memory dependencies in the SMS optimisation * Improved vectorisation of widening multiplies by keeping the operands smaller for longer * Improves the peeling of potentially misaligned vectorised loops * Improved vectorisation of signed and unsigned widening multiplies by a constant * Merges the new upstream Cortex-A5 tuning Fixes: * LP: #721531: Don't optimise out testing of the Thumb mode bit on function pointers * LP: #723185: ICE in reload_cse_simplify_operands when compiling with -marm -mfpu=neon * LP: #744754: ICE in *neon_movoi when using NEON intrinsics * LP: #791327: ICE due to using the stack pointer in RSB instructions * LP: #797748: ICE building SPEC2006 403.gcc emit-rtl.c * LP: #803232: ICE on code that uses vld4q_s16() NEON intrinsic * LP: #809435: Omit building the target libiberty when building a cross compiler * LP: #807573: ICE in *truncsisf2_vfp: Could not find a spill register * PR 49385: Ensure at least one of the operands is a register in thumb2_movhi_insn * Fixes an EABI unwinding bug that improves interoperability with armcc * Fixes a DWARF 2 problem exposed through shrinkwrap. * Fixes a bug in __builtin_isgreaterequal Known issues: * Building Python 2.7 with -mfpu=neon exposes a bug in vmov.i64 in binutils 2.20.51. Please use 2.21 or later. Linaro GCC 4.5 2011.07 is the twelfth release in the 4.5 series. Based off the latest GCC 4.5.3+svn175676, the release is focused on maintenance. Interesting changes in 4.5 include: * Updates to 4.5.3+r175676 Fixes: * LP: #721531: Don't optimise out testing of the Thumb mode bit on function pointers * LP: #723185: ICE in reload_cse_simplify_operands when compiling with -marm -mfpu=neon * LP: #744754: ICE in *neon_movoi when using NEON intrinsics * LP: #797748: ICE building SPEC2006 403.gcc emit-rtl.c * LP: #803232: ICE on code that uses vld4q_s16() NEON intrinsic * Fixes a DWARF 2 problem exposed through shrinkwrap. The source tarball is available from: https://launchpad.net/gcc-linaro/+milestone/4.6-2011.07 https://launchpad.net/gcc-linaro/+milestone/4.5-2011.07 Downloads are available from the Linaro GCC page on Launchpad: https://launchpad.net/gcc-linaro Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain Bugs: https://bugs.launchpad.net/gcc-linaro/ Questions? https://ask.linaro.org/ Interested in commercial support? inquire at support(a)linaro.org -- Michael

14 years, 1 month

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[ACTIVITY] July 17-21

by Ira Rosen

Hi, - I finally submitted the over-widening patch, but Richard Guenther thought that this optimization should be done for scalars as well, and he is now working on this himself. - Some auto-vectorizer fixes Ira

14 years, 1 month

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Returned mail: see transcript for details

by suparna＠in.ibm.com

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14 years, 1 month

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Linaro QEMU 2011.07 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2011.07. Linaro QEMU 2011.07-0 is the latest monthly release of qemu-linaro. Based off upstream (trunk) QEMU, it includes a number of ARM-focused bug fixes and enhancements. This month's release is primarily minor improvements: - Fixes a compile failure on ia64 hosts - syscall 369 (prlimit64) implemented in linux-user mode - Fixes an ELF loader bug that caused problems with binaries generated by the Google Go compiler Plus of course new upstream fixes and improvements. Known issues: - The beagle and beaglexm models still do not support USB networking - Very recent Linaro omap3 hwpacks (20110716 and later) do not boot on the beagle model; this is caused by an x-loader bug (LP:813407) The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2011.07 Binary builds of this qemu-linaro release are being prepared and will be available shortly for users of Ubuntu. Packages will be in the linaro-maintainers tools ppa: https://launchpad.net/~linaro-maintainers/+archive/tools/ More information on Linaro QEMU is available at: https://launchpad.net/qemu-linaro

14 years, 1 month

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Appologies

by Andrew Stubbs

Hi All, Apologies for missing the stand-up call today. I've been having technical difficulties at my end. :( I think they're resolved now ... maybe. Andrew

14 years, 1 month

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[ACTIVITY] weekly status

by Ken Werner

Hi, * continued to look into #809768 (ICE when building bionic's libm) * created some toolchain and android builds for verification purposes * libunwind * discussions with Michael and Uli on how to proceed (thanks!) * started to work on libunwind-ptrace * also look for .debug_frame info if there is no .eh_frame info for the given IP * mimics the behaviour of the reworked local unwinding * Attended an IBM internal class on Wednesday Note: I'm off for two days (21-22) and back on Monday. Regards Ken

14 years, 1 month

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Branch is open

by Michael Hope

Hi there. The 2011.07 release has been spun and is testing up well. The 4.5 and 4.6 branches are now open so feel free to commit any approved patches. -- Michael

14 years, 1 month

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[Activity] Week ending July 15th 2011

by Ramana Radhakrishnan

== GCC == === Progress === * Identified particular patterns that have issues with scheduler descriptions in A8 and A9 . Fixes to be benchmarked next. * Spent sometime on the new tree-reassoc work but SPEC2k failed for some of the neon configurations. Needs investigation. * T2 perf call. * Looked at libquantum bits with Revital. * BRANCH_COST benchmarking now complete for T2 . Same is running for ARM state. * Some patch review and bugzilla triaging upstream. === Plans === * ivopts patch for RichardS to try out - related to the excessive moves between integer and VFP unit. * BRANCH_COST further results. * Submit scheduler patches upstream after benchmarking. Meetings: * 1-1s * TCWG calls Absences. * 1st Aug - 5th August - Linaro sprint. * 8th - 9th August -Internal training. * 29th Aug - Sept. 2 - Holiday booked and approved. * 31st Oct - 4th Nov - Linaro Summit Orlando - Travel to be booked.

14 years, 1 month

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[ACTIVITY] 11th - 17th July

by Andrew Stubbs

Continued responding to review comments on my widening multiply patches. Wrote large parts of most of the patches to fix bugs and tidy them up. The result is that all but patch 1 are now approved. Pushed the patches to Launchpad for final testing. Monitored the test status of my thumb2 constants patch, but it still hasn't returned any results. It seems Michael has been having some problems with his systems. Went back to looking at merging patches to 4.6. It's only really the hard ones left. Many are blocked on work that needs to be done by somebody else. Pinged Tom and Bernd to find out the status of their ones - all are stuck on the back burner. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * Widening Multiplies 1/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08721.html

14 years, 1 month

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[ACTIVITY] weekly status

by Revital Eres

- Tracked the problematic file which contains the loop that causing bootstrap failure with SMS flags on ARM machine. It is not caused by SMS but rather due to doloop optimization which is applied when SMS flags are set. Now working on locating the exact loop and producing a testcase to reproduce the error. - Looking into Spec2006/libquantum benchmark - it has hot loop with conditional store which suppress SMS as it is only applied on single basic-block loops. If-conversion can not be done (replacing the store with conditional move and then a store) because in order to do that we need to prove that there is a store to the same location in each iteration of the loop; and it is not the case in this loop. Apparently, when running with crotex-a8 flag cond_exe statement is generated for the store but that's happening only after register allocation pass which is applied after SMS (IIUC,moving the generation of cond_exe before RA is not trivial http://gcc.gnu.org/ml/gcc/2000-05/msg00079.html) So, I'm looking into teaching SMS to handle conditional statements based on technique presented in [1]. This change is not trivial so I'm going to estimate the potential of applying SMS on the loop at first stage. [1] M. Lam, "Software pipelining: an effective scheduling technique for VLIW machines"

14 years, 1 month

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[ACTIVITY] Jul 11 - Jul 14

by Ulrich Weigand

== GDB == * Tested GDB 7.2.91 prerelease on ARM; everything looking good. * Created a set of patches to prepare for Linaro GDB 7.3 series; verified release process on top of a current 7.3 snapshot. * Committed three mainline patches to fix shared library remote test problems (#804387). * Reviewed Yao's latest Thumb-2 displaced stepping patch. 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

14 years, 2 months

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[ACTIVITY} 2011-07-15

by David Gilbert

== String routines == * Sent a patch to libc-ports with modified configure scripts to add subdirectories for architecture specific ARM code, and the memchr.S from cortex-strings. == 64 bit atomics == * Working through comments on my patches and the set of discussions about the kernel interface for the helper case - not really sure which way that's going to go. == QEmu == * Looking at how tracing works, considering adding tracing to sd card code to help track down some of the sd card issues. Dave

14 years, 2 months

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[ACTIVITY] report week 28

by Peter Maydell

RAG: Red: Amber: OMAP3 patch upstreaming is slower progress than hoped Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == linaro-qemu-11.11 == * initial testing of linaro-qemu preparatory to next week's release == upstream-omap3-patches == * finished nand and onenand cleanup, sent 12-patch series upstream == gsoc-support == * mid-term evaluations == other == * discussion with other qemu developers about shortcomings / improvements to the device/bus model (qdev) * sent patch to fix compile error on ia64 hosts * patch review, etc Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 15-19 August: KVM Forum and LinuxCon NA, Vancouver

14 years, 2 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Fixed the unnecessary union initialisers that were causing ICEs with -g. This turned out to be a lot more work than Richard's one-liner suggested. :-) * Backported Chung-Lin's arm_legitimize_reload_address patch to 4.5. * Backported the smallest_mode_for_size patch to 4.5 and 4.6. * Patch review. * Found an off-by-one error in the vectoriser that caused it to think that contiguous memory regions overlapped. Unfortunately, this meant that a lot of my microbenchmarks were using the fallback ARM code instead of the nice-looking NEON code that I could see in the asm. * A bit more work on auto inc/dec. It tested regression-free for all default languages. Ran some more benchmarks and posted the results. == Next week == * Bugs and auto inc/dec. Richard

14 years, 2 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * analyzed/tested toolchain issues the Linaro Android folks are facing * libquadmath disabled due to configure test fail of the target libiberty (#809435) * fix will be in 11.07 release * ICE when building bionic's libm (#809768) * not reproducible with a "plain" Linaro GCC * non upstreamable workaround in place (prevents the ICE but degrades the DWARF quality) * binary toolchain at http://people.linaro.org/~kwerner/ * libunwind * localunwrework branch now on git.linaro.org Note: I'll take two days off at the end of next week (21-22). Regards Ken

14 years, 2 months

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[ACTIVITY] 11th - 15th July

by Asa Sandahl

Achieved: * Set up networking on the Panda board, ssh to the board from my laptop works fine. * Downloaded the benchmarks (SPEC2000 and EEMBC) and built them for x86. I now have a basic understanding of what the benchmarks do and how to run them. * For EEMBC I used the -m32 flag for building on my 64 bit installation. * For the SPEC2000 I used the Linaro configuration file and enabled the portability flags for a 64-bit host. Played around with different "runspec" actions and options. Building and running individual test cases as well as the full test suites. Finally I did a reportable run for all benchmarks. It took several hours and in the end I got a result for my laptop. Next step: * Cross-compile EEMBC and SPEC2000. I will try linaro-gcc and the cross compiler that comes with Natty. Best Regards Åsa

14 years, 2 months

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[ACTIVITY] July 11-14

by Ira Rosen

Hi, - merged over-widened multiply patch to gcc-linaro-4.6 (now vectorized rgbyiqv should be about as good as its scalar version) - continued working on over-widened shifts and bit operations Ira

14 years, 2 months

1
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Error: selected processor does not support requested special purpose register

by mins.lin＠globalunichip.com

Hi, I used Linaro cross-toolchain version 4.5 (gcc-4.5-arm-linux-gnueabi) to compile linux-linaro-11.05 for beagle board, but got the following error messages: ---- AS arch/arm/boot/compressed/head.o arch/arm/boot/compressed/head.S: Assembler messages: arch/arm/boot/compressed/head.S:127: Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr' arch/arm/boot/compressed/head.S:134: Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr' arch/arm/boot/compressed/head.S:136: Error: selected processor does not support requested special purpose register -- `msr cpsr_c,r2' make[2]: *** [arch/arm/boot/compressed/head.o] Error 1 make[1]: *** [arch/arm/boot/compressed/vmlinux] Error 2 make: *** [uImage] Error 2 ---- The .config file I used for kernel build is "config-2.6.38-1003-linaro-omap" which is from hwpack_linaro-omap3-x11-base_20110526-5_armel_supported.tar.gz My host development platform is 64-bit Ubuntu 10.04.2 LTS (Linux ubuntu 2.6.32-32-generic #62-Ubuntu SMP Wed Apr 20 21:52:38 UTC 2011 x86_64 GNU/Linux). Is this a known bug, or did I miss anything else ? Thanks. --------------------------------- Email Confidentiality Notice ------------------------------------------ If you are not the intended recipient for this CONFIDENTIAL E-mail, please delete it immediately without keeping or distributing any copy and notify the sender. ----------------------------------------------------------------------------------------------------------------------

14 years, 2 months

2
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[Activity] Week ending July 8th .

by Ramana Radhakrishnan

== GCC == === Progress === * Panda board up again with apparently no change with software on it. Not sure what caused the difference today ! Now chugging along with SPEC2k. * Back on to BRANCH_COST . SPEC2k now running fully whence panda board was restored. * Submitted cleaned up neon shift immediates patch for merging. * On merge request review in Linaro this week. * Backported arith_shiftsi patch to 4.6 branch upstream. (done) * Identified particular patterns that have issues with scheduler descriptions in A8 and A9 . Working on fixes. === Plans === * Submit one_cmpldi2 patch for neon upstream. * Finish the scheduler patches. * Investigate A8 vs A9 regressions. * Look at EPILOGUE_USES and coremark . not sure why it regresses in performance yet. Meetings: * 1-1s * TCWG calls Absences. * 1st Aug - 5th August - Linaro sprint. * 8th - 9th August - Internal training. * 29th Aug - Sept. 2 - Vacation.

14 years, 2 months

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[ACTIVITY] 4th - 8th July

by Andrew Stubbs

Completed the merge of FSF GCC 4.5 & 4.6 to Linaro GCC. There were a few extra test failure in the i686 testing for both toolchains, but x86_64 and arm were clean, so it seems likely to be an environmental issue (in particular, some of the failures were linker crashes). Posted an update to my widening multiplies patch 3. This one hopefully addressed the issues found by Richard Guenther. Also tested an posted updates to my other patches that had their context changed. Richard picked more holes in my patch, and also reviewed patches 4, 5 and 6. 4 & 5 only have minor issues so far, and 6 has actually been approved! :) Rewrote patch 3 yet again following review. Richard has now modified the VRP pass to make the widening pass's job simpler, so I don't need it to do as much. Also rebaslined the whole patch set; Bernd's recent patch has introduced some conflicts. Found (some of?) the bugs that broke my thumb2 constants patch. Pushed the updated patch to Launchpad for testing. Updated a lot of the patch tracker data. Half day Thursday. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * Widening Multiplies 1/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08721.html * Widening Multiplies 2/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08723.html * Widening Multiplies 3/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08724.html * Widening Multiplies 4/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08725.html * Widening Multiplies 5/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08726.html * Widening Multiplies 7/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08728.html

14 years, 2 months

1
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[ACTIVITY] weekly status

by Ken Werner

Hi, * fixed a bug where libunwind could segfault when unwinding through a shared library using the ARM specific unwind tables * discussed the libuwind internals with Uli (thanks!) and concluded that the best way to implement remote unwinding for ARM is to integrate the support for the ARM.exidx* directly into the DWARF code * otherwise the user visible remote API needs to be extended for ARM only which seems to be a bad idea * requires to re-implement the existent ARM code (both local and remote) * will also benefit from libunwind's (dwarf) caching mechanism * started to re-implement the ARM code Regards Ken

14 years, 2 months

1
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[ACTIVITY] Weekly status

by Revital Eres

- Continue Spec2006 analysis: Looking into SMS opportunities in SPEC2006/462.libquantum. - Looking into recent bootstrap failure with SMS flags on ARM -- it seems to be related to do-loop optimization.

14 years, 2 months

1
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Generating ancilliary sections with gas (fwd)

by Nicolas Pitre

Hello Michael, We do have more and more instances of the following issues turning up in the kernel requiring toolchain assistance to solve the problem properly. Could you or someone from your team follow this up please? ---------- Forwarded message ---------- Date: Tue, 1 Feb 2011 12:16:48 +0000 From: Dave Martin <dave.martin(a)linaro.org> To: binutils(a)sourceware.org Cc: linaro-toolchain <linaro-toolchain(a)lists.linaro.org> Subject: Generating ancilliary sections with gas Hi all, Every now and again I come across a situation where it would be really useful to be able to query the assembler state during assembly: for example, to query and do something based on the current section name. This makes it possible to write generic macros to do certain things which otherwise require manual maintenance, or complex and fragile external preprocessing. Below, I give a real-world example of the problem, and sketch out a possible solution. What do people think of this approach? Does anyone have any better ideas on how to solve this? Cheers ---Dave EXAMPLE An example is the generation of custom ancilliary sections. Suppose you want to write macros which record fixup information. Currently, there's no way to put each fixup in an appropriately named section automatically within gas. Tellingly, gas has had to grow the ability to do this internally at least for ARM, since the exception handling information in .ARM.ex{idx,tab}* must go in sections with names based on the associated section name. However, this ancillary section generation support is neither flexible nor exposed to the user. By putting fixups in sections whose names are based on the name of the section they refer to, selective link-time discard of the fixups (and hence the code referenced by the fixups) will work; otherwise it doesn't. This would help avoid a situation where we have to keep dead code in the kernel because custom fixups are applied to it: at run-time, the code gets fixed up, then is thrown away. The fixups can't be selectively discarded because they are all in the same section: we seem have to no good way to separate them out into separate sections appropriately. For context, see: http://www.spinics.net/lists/arm-kernel/msg112268.html PROPOSAL To solve the problem of generating custom ancillary sections during assembly, here's a simple proposal: introducing a new kind of macro argument can make aspects of the assembler state available to macros in a flexible way, with only minimal implementation required. Basically, the macro qualifier field could be used to identify arguments which are filled in by the assembler with information about the assembly state, rather than being filled in by the invoker of the macro: e.g.: .macro mymacro name:req, flags, secname:current_section /* ... */ .pushsection "\secname\name", "\flags" /* ... */ .popsection .endm /* ... */ mymacro .ancillary, "a" During expansion, \name and \flags are expanded as normal. But \secname is substituted instead with the current section name, so the macro expansion would look like this: /* ... */ .pushsection ".text.ancillary", "a" /* ... */ .popsection Without the special :current_section argument, it doesn't appear possible to implement a macro such as mymacro in a generic way. This surely isn't the only way to achieve the goal, and it's probably not the best way, but it does have some desirable features. Principally, while a new pseudo-op(s) could have been defined to append text to the current section name, etc., allowing the current section name to be appear as a macro parameter avoids prejudicing the way the text is used. So there should never be a need to introduce additional pseudo-ops to do things with the current section name: with this patch, the user can always implement their own macro to do the desired thing. This gets the desired behaviour and maximum flexibility, while keeping the implementation in gas very simple. Also, using the macro expansion system in this way allows the caller a free choice of macro parameter names, and so pretty much guarantees that existing code won't get broken by the change. Because my hack is currently simplistic, it has shortcomings: in particular, it's not desirable to parse an argument from the invocation line at all to fill a :current_section argument. Currently, an argument is read in if present, but its value is ignored and the current section name pasted in at macro expansion time instead. However, that should be straightforward to fix with a bit more code. Of course, there's no reason only to expose the current section name in this way. Any aspect of the the assembler state (current subsection, current section flags, current instruction set, current macro mode, etc.) could be made available in a similar way. USAGE EXAMPLE AND PATCH Note that the specific implementation described here is intended to be illustrative, rather than complete or final. binutils$ cat <<EOF >tst.s .macro push_ancillary_section name:req, flags, csec:current_section .pushsection "\name\csec", "\flags" .endm .macro register_fixup _register_fixup 100\@ .endm .macro _register_fixup label:req \label : push_ancillary_section .fixup, "a" .long \label\(b) .popsection .endm .long 1 register_fixup .long 2 .data .long 3 register_fixup .long 4 .long 5 register_fixup .long 6 EOF binutils$ gas/as-new -ahlms -o tst.o tst.s ARM GAS tst.s page 1 1 .macro push_ancillary_section name:req, flags, csec:current_section 2 .pushsection "\name\csec", "\flags" 3 .endm 4 5 .macro register_fixup 6 _register_fixup 100\@ 7 .endm 8 9 .macro _register_fixup label:req 10 \label : 11 push_ancillary_section .fixup, "a" 12 .long \label\(b) 13 .popsection 14 .endm 15 16 0000 01000000 .long 1 17 register_fixup 17 > _register_fixup 1000 17 >> 1000: 17 >> push_ancillary_section .fixup,"a" 17 >>> .pushsection ".fixup.text","a" 17 0000 04000000 >> .long 1000b 17 >> .popsection 18 0004 02000000 .long 2 19 20 .data 21 0000 03000000 .long 3 22 register_fixup 22 > _register_fixup 1003 22 >> 1003: 22 >> push_ancillary_section .fixup,"a" 22 >>> .pushsection ".fixup.data","a" 22 0000 04000000 >> .long 1003b 22 >> .popsection 23 0004 04000000 .long 4 24 0008 05000000 .long 5 25 register_fixup 25 > _register_fixup 1006 25 >> 1006: 25 >> push_ancillary_section .fixup,"a" 25 >>> .pushsection ".fixup.data","a" 25 0004 0C000000 >> .long 1006b 25 >> .popsection 26 000c 06000000 .long 6 ARM GAS tst.s page 2 NO DEFINED SYMBOLS NO UNDEFINED SYMBOLS binutils$ arm-linux-gnueabi-objdump -rs tst.o tst.o: file format elf32-littlearm RELOCATION RECORDS FOR [.fixup.text]: OFFSET TYPE VALUE 00000000 R_ARM_ABS32 .text RELOCATION RECORDS FOR [.fixup.data]: OFFSET TYPE VALUE 00000000 R_ARM_ABS32 .data 00000004 R_ARM_ABS32 .data Contents of section .text: 0000 01000000 02000000 ........ Contents of section .data: 0000 03000000 04000000 05000000 06000000 ................ Contents of section .fixup.text: 0000 04000000 .... Contents of section .fixup.data: 0000 04000000 0c000000 ........ Contents of section .ARM.attributes: 0000 41150000 00616561 62690001 0b000000 A....aeabi...... 0010 08010901 2c01 ....,. diff --git a/gas/macro.c b/gas/macro.c index e392883..95c4de1 100644 --- a/gas/macro.c +++ b/gas/macro.c @@ -516,6 +516,8 @@ do_formals (macro_entry *macro, int idx, sb *in) formal->type = FORMAL_REQUIRED; else if (strcmp (qual.ptr, "vararg") == 0) formal->type = FORMAL_VARARG; + else if (strcmp (qual.ptr, "current_section") == 0) + formal->type = FORMAL_CURRENT_SECTION; else as_bad_where (macro->file, macro->line, @@ -540,6 +542,15 @@ do_formals (macro_entry *macro, int idx, sb *in) name, macro->name); } + else if (formal->type == FORMAL_CURRENT_SECTION) + { + sb_reset (&formal->def); + as_warn_where (macro->file, + macro->line, + _("Pointless default value for current_section parameter `%s' in macro `%s'"), + name, + macro->name); + } } /* Add to macro's hash table. */ @@ -734,7 +745,11 @@ sub_actual (int start, sb *in, sb *t, struct hash_control *formal_hash, ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (t)); if (ptr) { - if (ptr->actual.len) + if (ptr->type == FORMAL_CURRENT_SECTION) + { + sb_add_string (out, segment_name (now_seg)); + } + else if (ptr->actual.len) { sb_add_sb (out, &ptr->actual); } diff --git a/gas/macro.h b/gas/macro.h index edc1b6b..ea6cabb 100644 --- a/gas/macro.h +++ b/gas/macro.h @@ -38,7 +38,8 @@ enum formal_type { FORMAL_OPTIONAL, FORMAL_REQUIRED, - FORMAL_VARARG + FORMAL_VARARG, + FORMAL_CURRENT_SECTION, }; /* Describe the formal arguments to a macro. */ _______________________________________________ linaro-toolchain mailing list linaro-toolchain(a)lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain

14 years, 2 months

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[ACTIVITY] report week 27

by Peter Maydell

RAG: Red: Amber: OMAP3 patch upstreaming is slower progress than hoped Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == upstream-omap3-patches == * split and did most of the cleanup of 'overhaul onenand support' patch * updated the omap gpio qdev patchset in response to review comments, just about ready to send v2 * this is going more slowly than I had anticipated == other == * patch review, etc * confirmed attendance at KVM Forum and LinuxCon NA Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 15-19 August: KVM Forum and LinuxCon NA, Vancouver

14 years, 2 months

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Updated armel cross toolchains for lucid/maverick/natty releases

by Marcin Juszkiewicz

Hi Linaro backport PPA [1] got updated to latest versions of armel cross toolchains -- oneiric packages were used as a base. What got changed: - gcc 4.4 was updated to 4.4.6-3ubuntu1 - gcc 4.5 was updated to 4.5.3-1ubuntu2 - binutils was updated to 2.21.52.20110606-1ubuntu1 - eglibc was updated to 2.13-6ubuntu2 - gcc 4.6 was provided as 4.6.0-14ubuntu1 in Maverick, Natty - gcc-defaults-armel-cross was updated to 1.6 in Maverick, Natty (uses gcc-4.6 as default) There is no gcc-4.6 for Lucid currently as it requires newer versions of few libraries (mpfr, mpc) and one of rule of this PPA is "do not update packages which may affect other packages". Please test them and report any bugs found. 1. https://launchpad.net/~linaro-maintainers/+archive/toolchain/

14 years, 2 months

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[ACTIVITY] Jul 4 - Jul 8

by Ulrich Weigand

== GDB == * Posted patch to fix shared library remote test problems (#804387). * Started reviewing Yao's latest Thumb-2 displaced stepping patch. == GCC == * Reviewed and approved Richard's mainline reload patch to fix #803232 (ICE on code that uses vld4q_s16() NEON intrinsic). * Followed up on gcc-patches to address concerns about Julian's unaligned access patch. 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

14 years, 2 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Looked at why the fix for #721531 wasn't working on the Linaro branches. Wrote follow-up patches for both. Fix now committed to 4.5 and 4.6. * Looked at #736007. Submitted and committed patch upstream. * Looked at some "odd" ivopts behaviour. It turned out that this was working mostly as expected. I'm still wondering about a couple of tweaks. * Looked briefly at a miscompilation of vector code that turned out to occur during predictive commoning. I haven't yet checked whether the bug is there or not. For the time being, I'm using -fno-predictive-commoning so that I can get on with other stuff. * Looked at why the auto-inc-dec stuff wasn't as effective with current mainline. It turns out that the new misaligned load/store patterns are using overly weak predicates, so it appears to the RTL optimisers as though we support reg+offset addresses. * Reviewed the shrink-wrap patch. * More auto inc/dec. == Next week == * Backport the fix for #736007. * More loop stuff. Richard

14 years, 2 months

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[ACTIVITY] 4th - 8th July

by Asa Sandahl

Achieved: * HW in place. Borrowed another Panda board that I can use permanently. * linaro-media-create installed and working. Flashed sd-card with 11.05 for Panda board. * Played around with the Panda board. Networking is on the way. I can ssh to my computer from the Panda but not the other way around yet. Issues: * Serial log from Panda board not working yet. Mike suggested I try a straight-through cable instead in of a null-modem cable. (Have not done this yet.) * The ST-E firewall (proxy) is causing me some headache. But at least everyone here is facing the same issues, so there are people to talk to about the problems. Good to know: * I will be on vacation 18th July - 15 August Best Regards Åsa

14 years, 2 months

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[ACTIVITY] July 3-6

by Ira Rosen

Hi, - continued working on prevention of over-widening in vectorization - finalizing the patch - improvement of vectorizer peeling heuristic - merged to gcc-linaro-4.6 - vectorization of widen-mult with over-promoted operands - proposed for merge to gcc-linaro-4.6 - fixed PR 49610 - patch reviews I am on vacation tomorrow and on Sunday. Ira

14 years, 2 months

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LLVM on ARM testing.

by Karel Gardas

Hello, I'm interested in LLVM correct performance on ARM hardware and it looks like LLVM is kind of sensitive to what GCC version is used for its compilation. I tested LLVM 2.9 as a reference point and LLVM HEAD as of June 29 on ARMv7 (two boards with two different Ubuntu versions) compiled by GCC 4.3.4, 4.4.1, 4.4.5, 4.5.2, 4.6.1 Linaro 2011.05 and 4.6.1 Linaro 2011.06. Please see http://ghcarm.wordpress.com/2011/07/03/llvm-on-arm-testing/ It looks like LLVM HEAD does have about 28 regressions in comparison with LLVM 2.9. But also Linaro's GCC 4.6.1s do have some regressions in comparison with older GCC 4.3.4 and 4.4.1. Also what is really interesting with LLVM is how much tests fails when compiled with -O2 or default -O3 compilation option. I don't know if the culprit here is LLVM code or just GCC miscompilation/overoptimization? Is there any testing I may do to help you fix those regressions? Thanks, Karel

14 years, 2 months

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[ACTIVITY] 27th June - 1st July

by Andrew Stubbs

Worked on updates to the widening multiplies patches following upstream review. This was never going to be as easy as it first looked, so I've spent much of the week trying to figure out how make annoying type casts go away. Merged both FSF GCC 4.5 and 4.6 to Linaro GCC. Pushed the new tree to Launchpad for testing. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * Widening Multiplies 1/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08721.html * Widening Multiplies 2/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08723.html * Widening Multiplies 3/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08724.html * Widening Multiplies 4/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08725.html * Widening Multiplies 5/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08726.html * Widening Multiplies 6/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08727.html * Widening Multiplies 7/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08728.html

14 years, 2 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * continued to look into how to add remote support for libunwind using ptrace * reworked the lookup of the ARM specific unwind tables for local unwinding * re-use the existent (dwarf related) infrastructure to find the ARM specific unwind tables rather than doing it on our own * removes some code and the limitation of only supporting a certain amount of unw tables * (hopefully) smooths the way for remote unwinding via ptrace * submitted a patch that fixes the syntax of inline assemblies for some GCC versions Regards Ken

14 years, 2 months

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[Activity] June 23 - July 1

by Ramana Radhakrishnan

(This is a combined report having realized that I didn't manage to send this out on Monday because of some power issues). == GCC == == Progress == * Cleared out some backlog of backports from mainline. * Investigating some of the BRANCH_COST results. * Small patches to fix VFP constraints being tested and fixed on trunk upstream. * Upstream bugzilla triaging. * Upstream bugzilla triaging. * Looked at Neon 64 bit arithmetic and sent out report. * Reviewed the unaligned access patch and the EPILOGUE_USES regression with coremark. * Issues with my panda board means my benchmark runs aren't happening. Need to urgently find a way of running them. The panda board dies mysteriously once a while. Playing around with the kernel to get something going . Will look at it again next week. * Merged neon shift immediates patch into linaro-4.6 but needs some rework. * Merged the fix for LP744754 into linaro 4.5 and 4.6 == Plans == * Back on to BRANCH_COST . * Resubmit neon shift immediates patch for merging. * Look at some of the perf regressions between a8 and A9. * Get a working panda board again. ! * Backport arith_shiftsi patch to 4.6 branch upstream. Meetings: * 1-1s * TCWG calls.

14 years, 2 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * More on the address-of-main() bug. The original patch caused regressions on x86_64, so I submitted a different approach, which has now been applied upstream. * Worked on the libnih bug. It turned out to be a problem in the libc start routine. * A bit of patch review. * More on auto inc/dec. == Next week == * General bug-fixing. * More auto inc/dec. Richard

14 years, 2 months

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[ACTIVITY] 2011-07-01

by David Gilbert

== 64 bit atomics == * Submitted patches to gcc patch list - One comment back already asking if we should really change ARM to have a VDSO to make checks of the user helper version easier * Added thumb ldrexd/strexd to valgrind; patch added to bug in their bugtracker (KDE bug 266035) * Came to the conclusion eglibc doesn't actually need any changes - It's got a place holder for a 64bit routine, but it's unused and isn't exposed to the libc users - Note that neither eglibc or glibc built cleanly from the trunk on ARM. * Started digging into QEmu a bit more to find out how to solve the helper problem == String routines == * Added SPEC2k6 string routine results to my charts; while most stuff is in the noise it seems the bionic routine is a bit slower overall than everything else, and my absolutely trivially simple ~5 instruction loop is a tie for the fastest with my smarter 4 byte/loop using uadd. == Next week == * Sleep, Rest, Relaxation, getting older * (Will be polling email for any more follow ups on my gcc patches) Dave

14 years, 2 months

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[ACTIVITY] Jun 27 - Jul 1

by Ulrich Weigand

== GDB == * Analyzed all failures and skipped tests in remote gdb testsuite. Opened bug reports to track problems and missing features: 804387 [remote testsuite] Shared library test problems 804392 [remote testsuite] Rebuilt executables not copied 804396 [remote testsuite] Spurious failures 804400 [remote testsuite] Unnecessarily disabled tests 804401 [remote testsuite] Thread support 804403 [remote testsuite] Support for "attach" tests 804405 [remote testsuite] Core file tests 804406 [remote feature] Generate core files 804407 [remote feature] fork/vfork/exec events 804408 [remote feature] Address space randomization 804409 [remote feature] Checkpoints 804411 [remote feature] "info proc" == GCC == * Reviewed several Linaro GCC merge requests. * Fixed mainline reload bug PR rtl-optimization/49114 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

14 years, 2 months

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[ACTIVITY] report week 26

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: (q1 milestones deleted) ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == upstream-omap3-patches * analysed omap3 patchstack and identified some initial parts to pull out * extracted and submitted upstream a 3-patch set to qdevify omap gpio * disentangled a cluster of patches for fixing and qdevifying NAND, ONENAND and the OMAP GPMC model; started on the cleanup process * spotted and fixed a bug where n810 segfaults if a key is pressed (this was already fixed in qemu-linaro but not very cleanly) == other == * submitted patch for proper implementation of prlimit64 syscall for qemu usermode * sent a patch to fix the final gcc 4.6 write-only-variable warning * patch review, etc Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 2 months

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[ACTIVITY] 27th June - 1st July

by Asa Sandahl

* Got introduced to most of the team members - great! * My manager fixed a linaro laptop for med which I have installed with Natty. (This is very good since I cannot run as root on my STEricsson laptop. There are also other security restrictions that makes it very hard to work in Linaro.) * Started working a little bit with the Snowball board. I have managed to flash it using the "riff" tool. * Read through the material about SPEC2000. * I have borrowed a Panda board that I can use for the next two weeks. A question that popped up is how to get one from Linaro? * I will be on vacation 18th July - 15 August Best regards Åsa

14 years, 2 months

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No usb on omap3: 4.6 toolchain issue?

by Paolo Pisati

It all started with this: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/791552 basically, switching toolchain from 4.5 to 4.6, somehow broke usb on omap3. This morning i tested with linux-linaro-natty: [flag@newluxor linux-linaro-natty]$ git log --oneline -1 f15fd8f LINARO: Linux-linaro-2.6.38-1002.3 and i can reproduce the problem there too. Here is some more info (dmesg, toolchain, lsusb, etcetc): http://pastebin.ubuntu.com/620786/ -- bye, p.

14 years, 2 months

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[ACTIVITY] June 26-30

by Ira Rosen

Hi, - support of multiple uses of original pattern statements (needed for over-promotion work) - committed upstream - support of widen-mult of unsigned types and constants - merged to gcc-linaro-4.6 - vectorizer peeling heuristic improvement - proposed to merge to gcc-linaro-4.6 Ira

14 years, 2 months

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Fwd: [Bug gas/12931] ARM: gas fails to set the proper alignment on code sections, causing broken output

by Dave Martin

See the following commit in binutils trunk. If this is causing problems in other places, it could be worth considering for backport into the linaro tools. Cheers ---Dave http://sourceware.org/bugzilla/show_bug.cgi?id=12931 --- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2011-06-29 16:29:43 UTC --- CVSROOT: /cvs/src Module name: src Changes by: nickc(a)sourceware.org 2011-06-29 16:29:38 Modified files: gas : ChangeLog gas/config : tc-arm.c Log message: PR gas/12931 * config/tc-arm.c (mapping_state): When changing to ARM or THUMB state set the minimum required alignment of the section. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/ChangeLog.diff?cvsroot=src… http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/config/tc-arm.c.diff?cvsro…

14 years, 2 months

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iDCT implementation in GCC NEON intrinsics, for your perusal

by Michael K. Edwards

Here's an implementation of an 8x8 integer DCT done with NEON intrinsics -- essentially a translation of the assembly version in libjpeg-turbo trunk: https://github.com/mkedwards/crosstool-ng/blob/master/patches/libjpeg-turbo… It is in a compilable (on Linaro 2011.05 GCC 4.5, anyway; a recent Linaro 4.6 snapshot ICEs) but otherwise untested state. Still, it's interesting to compare the assembly that it generates against the hand-written version. I thought I'd give linaro-toolchain a heads-up in case y'all could use a test case that generates plenty of pressure on the VFP/NEON register bank. (I intend to use it to see how much performance difference there really is, on the A8 and A9, between NEON code compiled for 16 vs. 32 registers.) Cheers, - Michael

14 years, 2 months

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Added an ARMv5E board

by Michael Hope

I've added a pico-SAM9G45 board to my home office setup. It's called libra1 and runs Debian 6.0. The nice thing about this board is it has 256 MB of RAM and should be able to run SPEC 2000. I'll start using it to check that our GCC changes don't cause significant performance regressions on earlier architectures. Dave, you could use it to test the 64 bit primitives if you want. There's more information on the configuration at: http://bazaar.launchpad.net/~michaelh1/+junk/hardware/view/head:/libra/r1/R… -- Michael

14 years, 2 months

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GCC cross compilation help: [cannot compute suffix of object files]

by mins.lin＠globalunichip.com

Hello, I tried to build the gcc-linaro cross compiler tool on the x86_64 ubuntu-10.04 machine. The build and host machine is the x86_64 ubuntu-10.04, the target is arm-eabi. But failed and got the following error messages: ----- checking host system type... arm-unknown-eabi checking for arm-eabi-ar... arm-eabi-ar checking for arm-eabi-lipo... arm-eabi-lipo checking for arm-eabi-nm... /home/minslin/ET0001A/build-gcc/./gcc/nm checking for arm-eabi-ranlib... arm-eabi-ranlib checking for arm-eabi-strip... arm-eabi-strip checking whether ln -s works... yes checking for arm-eabi-gcc... /home/minslin/ET0001A/build-gcc/./gcc/xgcc -B/home/minslin/ET0001A/build-gcc/./gcc/ -B/home/minslin/linaro-gcc/arm-eabi/bin/ -B/home/minslin/linaro-gcc/arm-eabi/lib/ -isystem /home/minslin/linaro-gcc/arm-eabi/include -isystem /home/minslin/linaro-gcc/arm-eabi/sys-include checking for suffix of object files... configure: error: in `/home/minslin/ET0001A/build-gcc/arm-eabi/libgcc': configure: error: cannot compute suffix of object files: cannot compile See `config.log' for more details. make[1]: *** [configure-target-libgcc] Error 1 make[1]: Leaving directory `/home/minslin/ET0001A/build-gcc' make: *** [all] Error 2 ----- The configure options I used were: ----- ../gcc-linaro-4.5-2011.06-0/configure --target=arm-eabi --enable-languages=c,c++ --enable-shared --prefix=/home/minslin/linaro-gcc --with-gmp=/home/minslin/gmp --with-mpfr=/home/minslin/mpfr --with-mpc=/home/minslin/mpc ----- I downloaded and built the GMP, MPFR and MPC packages. The versions I used are: gmp-5.0.2 mpfr-3.0.1 mpc-0.8.2 Please help me solving this problem. Thanks. Best regards, ------------------------------------------------------------ Min-Shong Lin (林敏雄) Engineering Division Global UniChip Corp. (創意電子) EMAIL : mins.lin(a)globalunichip.com TEL : +886-3-5646600 ext. 6937 --------------------------------- Email Confidentiality Notice ------------------------------------------ If you are not the intended recipient for this CONFIDENTIAL E-mail, please delete it immediately without keeping or distributing any copy and notify the sender. ----------------------------------------------------------------------------------------------------------------------

14 years, 2 months

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[ACTIVITY] 20th - 24th June

by Andrew Stubbs

Continued work on widening multiplies. Finally got a point where I have something I'm happy to post upstream! Posted here: http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08720.html Richard Guenther reviewed one of the patches, and found a flaw, so I've been working on addresssing that. Booked hotel for August sprint. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * Widening Multiplies 1/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08721.html * Widening Multiplies 2/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08723.html * Widening Multiplies 3/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08724.html * Widening Multiplies 4/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08725.html * Widening Multiplies 5/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08726.html * Widening Multiplies 6/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08727.html * Widening Multiplies 7/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08728.html

14 years, 2 months

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[ACTIVITY] 2011-06-24

by David Gilbert

== Atomics == * Testing the libgcc fallback code with Nicholas's kernel patch - and then fixing my initialisation code to use init_array's (thanks Richard for the hint) * Tidying stuff up after a review of my patch by Richard - the sync.md is now smaller than the original before I started. * Discussing sync semantics with Michael Edwards - he's spotted that the gcc ARM sync routines need to move their final memory barrier for the compare-exchange case where the compare fails. * Looking at valgrind; it looks like it should be OK with the commpage changes; but it doesn't currently support ldrexd and strexd; there is a patch for it to do ARM mode but not thumb yet. Dave

14 years, 2 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Catching up on email. * More experiementation with the auto inc/dec stuff. TBH, this has taken longer than expected, but I think it's close now. * Wrote a dejagnu testcase for PR 49196. Tested it on trunk and submitted it upstream. == Next week == * Backport fix for PR 49196. * Look at NEON reload failure. * More auto inc/dec. Richard

14 years, 2 months

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[ACTIVITY] report week 24

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off || ||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 || ||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 || ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == other == * wrote a number of patches fixing issues identified by exhaustive testing of the ARM decoder. Still some parts of the Thumb decoder to deal with. * discussion about 1176 (somebody has some patches to add support for it) and what set of feature switches are needed to support this and the 1136r1 (they have most but not all of the v6K feature set) * sent some patches which deal with the "VLDM/VSTM generate too many TCG ops" bug by raising the limit on number of TCG ops * sent a pull request for some ARM patches that had been languishing on the mailing list * tracked down a regression making vexpress crash when run on upstream QEMU to a recent Xen-related patch * working on AFDS (annual review) paperwork Meetings: toolchain, standup Lots of interrupts/bugfixing/review recently means I'm drifting slightly behind schedule on blueprints. Need to refocus on those next week. Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 2 months

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[ACTIVITY] Jun 20 - Jun 24

by Ulrich Weigand

== GDB == * Completed setup and baseline run for remote gdb testsuite. This involved tracking down and working around a variety of problems including: - issues with the cross-compiler packages - board files and sysroot for the debugger to use - timing problems in the dejagnu harness - multiple problems in the GDB testsuite itself At this point, I'm down to about a dozen extra FAILs and about 2000 tests (out of 16000) tests that are not executed in the remote testsuite for one reason or the other. Next step will be to analyze those and create bug reports. 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

14 years, 2 months

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[ACTIVITY] June 19-23

by Ira Rosen

Hi, - investigating detection of general over-widening cases in the vectorizer - improvements of widen-mult - proposed for merge to gcc-linaro-4.6 - fixed PRs 49443 and 49478 Ira

14 years, 2 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * in order to have the android's debuggerd use libunwind I looked at libunwind's remote interface and especially the libunwind-ptrace lib that sits on top of that. * the remote interface seems a bit awkward to me. The user provides a set of callbacks to access the inferior memory or registers. Instead of using these callbacks to obtain the actual unwind information (eh_frame fro example) it requires the user implement another callback (find_proc_info) to lookup the unwind info himself. * the libunwind-ptrace currently deos not support the ARM specific unwind tables * started to look into how to improve the situation * not straight forward as it's tightly bound to eh_frame unw info and libunwinds DWARF parsing mechanism * attending a class this afternoon * Note: I'm on vacation starting in a few hours and I'll be back on Tuesday next week. Regards Ken

14 years, 2 months

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[Activity] Week ending 2011-06-17

by Ramana Radhakrishnan

== Progress == * Backported A5 / A15 tuning to Linaro GCC. Waiting for test results. * T2 perf. meeting. * Backported the neon length patch back. * Patch for PR49385 being tested. * Bootstraps broken yet again / upstream maintenance / test regressions. * Waiting on Branch_cost results . * Minor binutils patches as a result of upstream maintenance. == Plans == * Finish BRANCH_COST tuning * Look at VFP moves for some more . * Backport some of the upstream bug fixes that need to be done. Meetings: * 1-1s * TCWG call. * At Google unconference 17-19 June

14 years, 2 months

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[ACTIVITY] 13th - 18th June

by Andrew Stubbs

Chaired the Toolchain Working group call. Michael H was unavailable (but OK) following yet another earthquake in Christchurch. Continued working on my widening multiplies patches. I did think for a while there must be a logic flaw because it's using the wrong sized inputs to instructions, but on closer inspection that was taken care of in the RTL transformations. The changes I already had seem good in all the test cases I could generate. I've also identified a number of additional optimization opportunities, so I've been tweaking the patch for those. Continued trying to figure out why my Thumb2 constants patches break the native bootstrap build. The stage2 compiler enters an infinite loop, but I couldn't easily identify why, as yet. Backported Julian's unaligned access patches to a Linaro test branch. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html

14 years, 2 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Experimented more with A8 and A9 tuning for auto inc/dec addresses. * More work on the auto inc/dec pass itself. * Compared the assembly output in the GCC testsuite for a range of targets (avr, bfin, h8300, ia64, m32c, m32r, m68k, am33, pa, pdp11, powerpc, rx, score, sh, xstormy16 and vax). * Looked at a few bug reports. Will submit patches when I get back. == Next week == * Holiday! Richard

14 years, 2 months

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[ACTIVITY] 2011-06-17

by David Gilbert

== 64 bit Atomics == * Wrote more test cases; now have a nice 3 thread test that passes - and more importantly, it fails if I replace one of the atomic ops by a non-atomic equivalent. * Modified existing atomic helper code in libgcc to do 64bit * Added init function to 64bit atomic helper to detect presence of new kernel and fail if an old one is present. That last one is a bit of a pain; it now correctly exits on existing kernels and aborts; qemu user space seg faults because access to the kernel helper version address is uncaught. So first thing I need to do is try the early kernel patch Nicolas sent around, and then I really need to see if qemu can be firmly persuaded to run it. == String routines == * Ran denbench with sets of strlen; started running some spec as well. == QEmu == * Tested Peter's prelease tarball in user space and a bunch of system emulations - successfully managed to say hello to #linaro from an emulated overo board using USB keyboard. == Other == * Booked 4th July week off. Dave

14 years, 2 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * short week (Monday -> public holiday, Wednesday -> attended a class) * tested the gcc-linaro-4.5-2011.06 with linaro-android on my panda * works! no noticeable differences to 4.5-2011.05 for me * libgui.so apriori prelink issue remains: * realized that apriori works quite different from GNU prelink * checked the prelink map against LOAD segment size - looks good * build with -DLINKER_DEBUG=1 - still doesn't give hints * give up for know and moving on * made a patchset to be able to build whole android with -DDEBUG * except of v8 and webkit * zygote segfaults for unknown reason * understood the basics of the current backtracing mechanism on android * the bionic linker registers signal handlers on SIGSEGV that opens a socket * the debuggerd listens on that socket and gets its regs etc. using ptrace * Note: I'll be on vacation starting on Thursday next week Regards Ken

14 years, 2 months

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[ACTIVITY] Jun 14 - Jun 17

by Ulrich Weigand

== GDB == * Committed support for NEON registers in core dumps (bug #615972) to mainline GDB and binutils repositories. * Added support to readelf (mainline binutils) to correctly display NEON register core file notes. * Started looking into remote gdb testsuite. == GCC == * Investigated reload failure when building kernel with Linaro GCC 4.5 (discovered by Arnd). * Investigated stray function references due to partial inlining breaking kernel build with Linaro GCC 4.6 (discovered by Arnd). 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

14 years, 2 months

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[ACTIVITY] report week 24

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off || ||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 || ||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 || ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || == omap3-usb-model == * fixed some corner case bugs revealed by Dave Gilbert's testing == linaro-qemu-11.11 == * qemu-linaro-2011.06 tested, uploaded and released on schedule == other == * pushed some patches fixing warnings on gcc 4.6 * exhaustive testing of the ARM decoder revealed that vfp load/store multiple with an overlarge immediate would try to store 256 regs and overrun the tcg buffer * set up an armv5 box and repro'd lp:739785 * working on AFDS (annual review) paperwork Meetings: toolchain, standup, GSoC student, 1-2-1, divisional comms. Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 2 months

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Generating ancillary sections with gas

by Dave Martin

Hi Michael, This thread about how to generate ancillary sections using gas has resurfaced again. Do you know who might be available from the toolchain group to take a look at this? It appears that this issue can best be solved by a change to gas (or, possibly, to gcc). Cheers ---Dave References: Dynamic patching in discarded sections <http://thread.gmane.org/gmane.linux.kernel/1152142> Generating ancilliary sections with gas <http://thread.gmane.org/gmane.linux.linaro.toolchain/686>

14 years, 2 months

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Interesting failure of vasprintf test from postler

by Marcin Juszkiewicz

There is a ftbfs on armel bug for postler: https://bugs.launchpad.net/ubuntu/+source/postler/+bug/791319 Attached test compiles fine on amd64 but fails on armel: 20:16 hrw@malenstwo:postler-0.1.1$ gcc _build_/.conf_check_0/test.c _build_/.conf_check_0/test.c: In function ‘main’: _build_/.conf_check_0/test.c:5:1: error: incompatible type for argument 3 of ‘vasprintf’ /usr/include/stdio.h:396:12: note: expected ‘__gnuc_va_list’ but argument is of type ‘char *’ Can someone explain me why this happens? Ubuntu armel and armhf cross compilers, CSL 2011.03-42 have same problem.

14 years, 2 months

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Chromium browser FTBFS on armel

by Marcin Juszkiewicz

Hi Yesterday I looked at bug [1] in chromium-browser but checked oneiric version: 12.0.742.91~r87961. It failed on linking to CUPS libraries so I looked at upstream repository and found fix [2]. With patch applied it failed on same place: LINK(target) out/Release/chrome [keep-alive] czw, 16 cze 2011, 18:21:39 CEST (441 min) /usr/bin/ld.bfd.real: out/Release/obj.target/third_party/cacheinvalidation/../../cacheinvalidation_proto_cpp/gen/protoc_out/google/cacheinvalidation/internal.pb.o(.text._ZN12invalidation21ClientToServerMessage27MergePartialFromCodedStreamEPN6google8protobuf2io16CodedInputStreamE+0x7d2): unresolvable R_ARM_THM_CALL relocation against symbol `operator new(unsigned int)@@GLIBCXX_3.4' /usr/bin/ld.bfd.real: final link failed: Nonrepresentable section on output collect2: ld returned 1 exit status make[1]: *** [out/Release/chrome] Error 1 make[1]: Leaving directory `/home/hrw/devel/porting-jam/chromium-browser-12.0.742.91~r87961/build-tree/src' make: *** [debian/stamp-makefile-build] Error 2 dpkg-buildpackage: error: debian/rules build gave error exit status 2 According to bugs [3][4] package may work when built without -fPIE but (as Loic wrote in [3]) "-fPIE is needed for some security features and web browsers are a critical piece of software that we want to protect". May someone take a look at this issue? One warning: this fail happens after 440 minutes of build on PandaBoard with usb hdd (took 1.8GB of space). If needed I can provide account on my panda with access to build directory (but this rather tomorrow then today) - IPv6 address only. 1. https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/791283 2. http://git.chromium.org/gitweb/?p=chromium/chromium.git;a=patch;h=c2b99f3fe… 3. https://bugs.launchpad.net/binutils-linaro/+bug/641126 4. http://code.google.com/p/chromium/issues/detail?id=55439

14 years, 2 months

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[ACTIVITY] June 12-16

by Ira Rosen

Hi, - fix vectorizer testsuite failures on ARM - committed - committed a fix of a bug in the vectorizer revealed by the widen-mult patch - committed an improvement of peeling heuristic - reduce over-widening in case of multiplication by a constant (improves vectorized rgbyiq by almost 2x) - committed - started backporting to gcc-linaro-4.6 Ira

14 years, 2 months

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[ACTIVITY] Weekly status

by Revital Eres

- Opened PR49385. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49385 - Committed SMS patch to fix recent bootstrap fail on ARM with SMS flags http://gcc.gnu.org/ml/gcc-patches/2011-06/msg00960.html - Committed SMS patch to Fix calculation of row_rest_count http://gcc.gnu.org/ml/gcc-patches/2011-06/msg01008.html Continue with Spec2006 analysis https://wiki.linaro.org/Internal/ToolChain/Benchmarks - Next two weeks (17 Jun to 2 July) --- vacation.

14 years, 2 months

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Linaro QEMU 2011.06 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2011.06. Linaro QEMU 2011.06 is the latest monthly release of qemu-linaro. Based off upstream (trunk) QEMU, it includes a number of ARM-focused bug fixes and enhancements. This release introduces two new features; these are still experimental so please report any issues: - A model of the Gumstix Overo board; this is an OMAP3 based system similar to Beagle but with the advantage of having supported onboard ethernet. - USB keyboard and mouse support, if your kernel includes support for the OMAP3 OHCI controller (not just EHCI). Try adding "-device usb-kbd -device usb-mouse" to your QEMU command line for Beagle or Overo models. Other interesting changes include: - A fix for the lack of graphics output on the Beagle model when running the Linaro 11.05 final release image - Suppression of the "Bad register 0x000000f8" warnings provoked by the Linaro 11.05 final release kernels - As usual, various minor correctness fixes and other upstream changes Known issues: - The beagle and beaglexm models still do not support USB networking - There are some gcc 4.6 warnings about "variable set but not used" which have not yet been resolved; Ubuntu Oneiric's gcc makes these non-fatal, but if you're building with an upstream gcc 4.6 you may need to add the "--disable-werror" option to configure The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2011.06 Binary builds of this qemu-linaro release are being prepared and will be available shortly for users of Ubuntu. Packages will be in the linaro-maintainers tools ppa: https://launchpad.net/~linaro-maintainers/+archive/tools/ More information on Linaro QEMU is available at: https://launchpad.net/qemu-linaro

14 years, 2 months

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