- linaro-toolchain - lists.linaro.org

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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 months

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