- linaro-toolchain - lists.linaro.org

[ACTIVITY] 17-21 June 2013

by Christophe Lyon

== Progress == * Completed list of backports from trunk to linaro-4.8 for 2013.07 release and sent it to Rob. * Merged backport of address sanitizer in linaro-4.8 branch * Aarch64 frame growing downward: checking what really needs to be changed in GCC. Documentation not very verbose :-) * Various attemps to resurrect my old testsuite patch to be stricter at excluding some unsupported configurations. * Internal support == Next == * Aarch64 frame growing downard. * Disable peeling: make the vectorizer less aggressive * Neon intrinsics/vuzip/veor: resume work * Book hotel/flight for Connect.

12 years, 10 months

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[ACTIVITY] Week 24

by Renato Golin

== Progress == * Release 3.3 - Finally public http://llvm.org/releases/download.html#3.3 http://llvm.org/releases/3.3/docs/ReleaseNotes.html * Pandaboard - We lost two bots this week: - linaro-panda-01: buildslave binary segfaults, needs fresh re-install? - linaro-panda-02: GCC installation is broken, needs fresh install!! - This means we need: - At least two boards for each bot - At least one extra board of each type, off-line to save power/space - A standard Image on a gz file to flash & boot quickly, for each type * Chromebook LNT - Binary search on patch that broke the buildbot, found the culprit - Reduced the problem, bug posted, discussing http://llvm.org/bugs/show_bug.cgi?id=16393 * CBuild - Built Clang+LLVM in CBuild, need benchmarks, sent a patch, waiting for merge * Phoronix results - Adding them to internal (pw protected) website to avoid public confusion - The numbers are meaningless for now and we don't want panic within the general public: http://people.linaro.org/toolchain-benchmarks/llvm/ - Visualization still broken. Works well only locally on Firefox. Why not HTML? Why not PNG? Sigh... * Administrativia / Others - Lots of patches to review - Auto-vectorizer now turned on by default on -O2 and -Os! - Meeting with LLVMLinux folks, good progress, good plans, trying to get more traction in that direction on Connect - Trial of "ARM maintenance" backlog item: http://llvm.org/bugs/show_bug.cgi?id=16387 == Plan == * Fix LNT bug * Implement AEABI divmod/udivmod calls * Try CBuild benchmark again (when patch merged) * Carefully analyse what's the best configuration for the pandas and produce a pre-packed image * NOT put them back before they're stable * But put TWO pandas as self-hosting (and leave Galina's alone) * Check why Phoronix result pages are not working Time allowing... * Have a look at PerfDB * Write a thing or two about the optimization levels in LLVM for the official docs

12 years, 10 months

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[ACTIVITY] Week 25

by Will Newton

== Progress == * Reverted AArch64 ifunc change while investiigation continues. * Created TCWG-177 for gdb.thread testsuite failures. * Merged new strlen code into cortex-strings and newlib. * Applied a few more gdb patches upstream. * Fixed a few bugs and added a few features to cortex-strings benchmarks. * gerrit review of memcpy change ongoing. == Issues == * None. == Plan == * Reproduce AArch64 ifunc issue. * Resolve gerrit memcpy review if possible. * Start work on malloc test and benchmark framework. -- Will Newton Toolchain Working Group, Linaro

12 years, 10 months

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[ACTIVITY] report week 25

by Peter Maydell

Progress: * virtio: ** have some patches that work (including modifying the device tree to tell the kernel where the virtio transports are) ** more cleanup still required; in particular need to figure out nice way of having the board model tell boot.c where the transports are and what the interrupt routing info should look like ** virtio spec needs clarification about what a virtio-mmio transport with no backend is supposed to look like * misc: ** fixed linux-user utimensat breakage caused by a patch of mine from last week ** helped Grant Likely with debugging problems running UEFI on QEMU (and caught a QEMU bug in the process) ** reviewed another round of LDA/STL patches and a VSEL patch Plans: * continue mach-virt/virtio work -- PMM

12 years, 10 months

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[ANNOUNCE] Linaro Toolchain Binaries 2013.06 released

by Bernhard Rosenkränzer

The Linaro Toolchain and Platform Working Groups are pleased to announce the 2013.06 release of the Linaro Toolchain Binaries, a pre-built version of Linaro GCC and Linaro GDB that runs on generic Linux or Windows and targets the glibc Linaro Evaluation Build. Uses include: * Cross compiling ARM applications from your laptop * Remote debugging * Build the Linux kernel for your board What's included: * Linaro GCC 4.8 2013.06 * Linaro Newlib 2.0 2013.06 * Linaro Binutils 2.23 2013.06 * Linaro Eglibc 2.17-2013.06 (Aarch64 only) * Linaro GDB 7.6 2013.05 * A statically linked gdbserver * A system root * Manuals under share/doc/ The system root contains the basic header files and libraries to link your programs against. Interesting changes include: * Linaro versions of Binutils, Newlib and Eglibc are included The Linux version is supported on Ubuntu 10.04.3 and 12.04, Debian 6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation 5.7 and later, and should run on any Linux Standard Base 3.0 compatible distribution. Please see the README about running on x86_64 hosts. The Windows version is supported on Windows XP Pro SP3, Windows Vista Business SP2, and Windows 7 Pro SP1. The binaries and build scripts are available from: https://launchpad.net/linaro-toolchain-binaries/trunk/2013.05 Need help? Ask a question on https://ask.linaro.org/ Already on Launchpad? Submit a bug at https://bugs.launchpad.net/linaro-toolchain-binaries On IRC? See us on #linaro on Freenode. Other ways that you can contact us or get involved are listed at https://wiki.linaro.org/GettingInvolved. Note: This will likely be the last release built with support for (e)glibc 2.15 on armv7. With future releases, you will have to either use a newer (e)glibc on the target system, or link statically.

12 years, 10 months

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Re: [Buildroot] Bizarre behavior of armeb toolchain

by Will Newton

On Thu, Jun 20, 2013 at 2:41 PM, Thomas Petazzoni <thomas.petazzoni(a)free-electrons.com> wrote: > Hello, > > I'm facing a bizarre problem with an armeb toolchain built by > Buildroot. I'm also posting this to the crossgcc@ list since there are > some gcc/binutils experts out there. > > First, a little bit of background. ARM Big Endian comes into two > variants: > > * BE32, which was used up to ARMv5, where both the instructions and > the data are Big Endian. > > * BE8, which is used since ARMv6, where the instructions remain > little-endian and only the data are big-endian. > > See > http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0338g/ch06s0… > for some details about this. > > So, I've built an ARMv7 Cortex-A8 toolchain, with the armeb > architecture selected. The CROSS-gcc -v shows that it was configured as > follows: > > --target=armeb-buildroot-linux-uclibcgnueabi > --with-abi=aapcs-linux > --with-arch=armv7-a > --with-tune=cortex-a8 > > Then, I wrote a simple program that contains some data and > instructions, built it under several conditions, and observed with > hexdump whether the data and code was little-endian or big-endian. > > And the results are somewhat surprising: when I explicitly pass > -mbig-endian, I get the proper behavior (BE8 code with code in little > endian and data in big endian), but when I don't pass any flags to the > compiler, I get an incorrect behavior: both the code and data are big > endian, as if the BE8 wasn't used (and readelf confirms that it wasn't > used). See below the detailed results. > > Note that the compiler is supposed to automatically use BE8 on > ARMv6/ARMv7 and BE32 on ARMv5 and earlier cores. > > The data is DEADBEEF, and the instruction is E52DB004. > > Flags used Observed data Observed code Comment > ======================= =============== =============== ========================================= > > -mlittle-endian EFBEADDE 04B02DE5 Code and data in LE -> OK > -mbig-endian DEADBEEF 04B02DE5 Code LE, data BE, binary marked BE8 -> OK > no flags DEADBEEF E52DB004 Data BE (ok!), code BE (*NOT* ok) -> NOK > -march=armv5t -mbig-endian DEADBEEF E52DB004 Code and data in BE, on ARMv5 -> OK > -march=armv5t DEADBEEF E52DB004 Code and data in BE, on ARMv5 -> OK > > As can be seen in this table: > > (*) On ARMv5, regardless of whether -mbig-endian is passed or not, the > code produced is correct (both code and data are big endian, which is > correct for ARMv5 where the big endian mode is BE32) > > (*) On ARMv7 however, the code is different whether -mbig-endian is > passed or not, even though an "armeb-linux" compiler is supposed to > generate big endian code by default. When no flags is passed, both the > data *and* code are big-endian (so it's BE32 like on ARMv5), but > passing -mbig-endian makes the thing behave properly (code is > little-endian, data is big-endian). > > I'm using binutils 2.23.2 and gcc 4.7.3. > > Any ideas? Hi Thomas, I added linaro-toolchain to CC as there may be someone there who knows the answer.

12 years, 10 months

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RE: Semi-hosting on v8 Foundation Model using gnu tools

by rorycollins＠hushmail.com

I got an app to compile fine for v8 FM with gcc, but I notice that seg-faults hang the simulator. Using raise() properly exits FM, but I can't seem to trap the seg-fault with signal() or do anything intelligent to know about the seg-fault. Normal execution works well. int main(int argc, char *argv[]) { * (unsigned int *) (0) = 0; // seg-fault hangs FM return(0); } thanks, Rory -----Original Message----- From: linaro-toolchain-boun...(a)lists.linaro.org [mailto:linaro-toolchain-boun...@lists.linaro.org] On Behalf Of Matthew Gretton-Dann Sent: Sunday, May 19, 2013 2:47 PM To: Padgett Don-B43265 Cc: linaro-toolchain(a)lists.linaro.org Subject: Re: Semi-hosting on v8 Foundation Model using gnu tools Don, On 17/05/13 20:57, Padgett Don-B43265 wrote: > The v8 Foundation Model User Guide has a bare metal hello world example > that uses semi-hosting. The Makefile uses ARM tools, however. Is there > equivalent support for this example using a bare metal version of the > gnu tools, such as > gcc-linaro-aarch64-none-elf-4.8-2013.04-20130422_linux.tar.xz? I took > a look, but didn't see a way to do this. It is possible but not necessarily easy. Using the binary tools you've downloaded you will want to do something like the following: aarch64-none-elf-gcc -specs=elf-aem-ve.specs ... The -specs option has to be on all your invocations of GCC and G++. You should also invoke the linker through GCC with this option. Then you need to invoke the model, given an image called foo.axf: Foundation_v8 --image foo.axf --semi-host="foo.axf OPT1 OPT2" --quiet Note that the first option to --semi-host is the name of the image again. Thanks, Matt

12 years, 10 months

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Re: gcc 4.8-2013.06 reports incorrect version number

by Mans Rullgard

You'll have better luck sending bug reports to the linaro-toolchain mailing list. On 18 June 2013 11:50, Bernhard Rosenkränzer <bernhard.rosenkranzer(a)linaro.org> wrote: > Hi, > the 4.8-2013.06 tarball built without version overrides reports itself as: > 4.8-2013.06-0~dev > Looks like the release flag isn't set in the tarball. > > ttyl > bero -- Mans Rullgard / mru

12 years, 10 months

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[ACTIVITY] 10-14 June 2013

by Christophe Lyon

== Progress == * Merges for linaro-4.8-2013.06: - investigated why the cross-validation lack libpthread and libdl. - fixed cbuild to make these libs available in the same dir as ld-linux.so - not sure why it wasn't necessary several weeks ago when I first spawn libsanitizer tests: we changed the prebuilt tarball since then, but the libs are still at the same place; the binutils version changed though. * Re-spawned a merge request for libsanitizer, using the updated cbuild (libpthread/libdl support, qemu flags updated) and the updated gcc-4.8 (with my patch to cope with qemu's output of /proc/self/maps) * Merges for linaro-4.8-2013.07: updated list * Aarch64 frame growing downward: started. * Disable-peeling: restarting looking at vectorizer. == Next == * Merges for linaro-4.[78]-2013.07: update list * disable peeling: see how to make the vectorizer less aggressive * Aarch64 frame growing downward. * Neon intrinsics/vuzip/veor: resume work * Book hotel/flight for Connect

12 years, 10 months

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[ACTIVITY] Week 24

by Yvan Roux

== Issues == * None. == Progress == * Releases merge reviews: - Finished reviews for releases. * Launchpad bug #1187247: - Closed as invalid since the issue was on an attempt to access at an invalid address. * Cbuild Babysitting: - Fixed 4.8 repository update on toolchain64. - Recreate ancestors tarballs and re-spawned jobs - Re-started Calxedas... * LRA on ARM and AArch64: - Resumed the task. - Investigation of AArch64 failure on-going. == Plan == * Mainly LRA

12 years, 10 months

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[ACTIVITY] 10-14 June 2013

by Venkataramanan Kumar

== Progress == * libssp support for AArch64 Libssp support needed AArch64 frame to grow downward. But it is currently defined as growing upward. This work is currently in hold. Needed frame layout changes before restarting. Waiting for feedback from Matt. * AAarch64 testing Drilling down Boot strap failure with GCC 4.9 trunk on open embedded image with V8 model. Fails at time xg++ is linking. Not much progress. Set up Cross build and test in V8 model for GCC testsuites. Also looking at increasing timeout for individual tests. * AArch64 LTO and PGO support. Started on understanding PGO and LTO runs with AArch64. == Plan == * Continue bootstrap testing and push patches to GCC * Continue LTO and PGO runs for AArch64

12 years, 10 months

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[ACTIVITY] 10 - 14 June 2013

by Omair Javaid

== Progress == * Investigated gdb.dwarf2 unsupported issues wrote two new patches for gdb.dwarf2 testsuite. * Read some background on dwarf2 to translate test written in x86 assembly into arm assembly. * Got refusal of visa from Irish embassy. Ran after visa consultants for issues related to visa application. * Calls with Irish consulate officers for appeal process and causes of refusal. == Plan == * Submit ready patches for dwarf2 untested/unsupported problems. * Translate dwarf2 tests written in x86 to arm asm. * Chromebook os update on a faster sd card. (Still pending) * Add JIRA cards for gdb features missing on arm. (Still pending) * Prepare documentation for future visa applications.

12 years, 10 months

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[ACTIVITY] Week 24

by Zhenqiang Chen

== Issues == * None == Progress == * Investigate conditional compare RTL representation. - Expand conditional compare to cmp_and/cmp_ior. - Test is ongoing * Investigate lp: 1189445. Patch is in testing. * Identify the root cause for lp: 1189448. FSF4.8 does not have the buggy code. Linaro 2013.06 and trunk have fixed it. == Plan == * Continue on conditional compare.

12 years, 10 months

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[ACTIVITY] 11-14 June 2013

by Kugan

== Public Holiday == * Monday, 10 June (4 day week) == Progress == * VRP based zero/sign extension - Pinged the patch. * Generate a single call to divmod - Builtin based implementation bootstrapped and passes regression. - posted patch and initiated discussion (http://gcc.gnu.org/ml/gcc/2013-06/msg00100.html) - long long is not handled now * Better end of loop counter optimisation - Dropped md patch - Verified that Bin Cheng's RTL change noop_move_p fixes this. == Plan == * Respond to patch review * Set-up X86 benchmarking locally for Spec2k

12 years, 10 months

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[ACTIVITY] week 24

by Rob Savoye

== Progress == * Did QEMU testing for the release by running several images on a few platforms. * Did the GCC 4.7-2013.06 release. * Did the GCC 4.8-2013.06 release. * Did a spin of the GCC 4.7-2013.06 release. * Updated benchmark parsing scripts, downloaded historical benchmark data and data from the release testing. * Updated SQL query and gnuplot scripts to work with new data. * Produced some benchmark graphs. * Finally figured out how to spawn remote Cbuildv1 tests and benchmarks. == Plan == * Focus on performance and regression test graphs. * Do builds of FSF GCC branches to compare with Linaro branches. * Continue improving Cbuildv2 as use it to do all these builds and testing. - rob -

12 years, 11 months

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[ACTIVITY] Week 24

by Will Newton

== Progress == * Branched and released binutils, newlib and eglibc. * Wrote up some release process docs on the wiki. * Fixes and further investigation of AArch64 ifunc issue. * Submitted memcpy to upstream gerrit and ran more benchmarks. * Submitted new fix for gdb frexpl issue. == Issues == * None. == Plan == * Fix AArch64 ifunc issue. * Fix gdb.thread issue. * strlen -- Will Newton Toolchain Working Group, Linaro

12 years, 11 months

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[ACTIVITY] report week 23

by Peter Maydell

[very short week; two days] Progress: * misc ** made qemu-linaro 2013.06 release ** remaining VIRT-4 work handed over to other people for now ** Huawei's AArch64 TCG patches now committed upstream ** working through mach-virt and virtio patches to see what still needs to be done here and in what order Plans: * continue mach-virt/virtio work * set up a new qemu-linaro tree/branch as our CI/LAVA input [to keep it separate from our "we release this" tree] * restart work on upstreaming omap3 patches as part of my generic qemu maintenance work (will reduce our maintenance burden in the long term) -- PMM

12 years, 11 months

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[ACTIVITY] Week 24

by Renato Golin

== Progress == * Pandaboard - Using GNU ld didn't help the problem, and made compilation time double to 5hs! - Reverting to Gold and will keep an eye on it * Release 3.3 finished - Tested and released, just waiting the final email * Linaro+ARM sync meeting - Setting priorities, requesting approval for some work items * Phoronix - Script to run batch mode ready at: http://people.linaro.org/~rengolin/llvm/scripts/ - Got some results, generally on par, some big differences could be due to compilation options - Some tests still run GCC, even with CC being Clang, Clang-only options (slp vect) cannot be tested - No way yet to share this data internally, working with IT to find a solution * CBuild - Merged Clang changes, running job again - Autodetecting ARMv7 * LLVM administrativia - many patches to review this week - vectorizer also being enabled by default on -O2 and -Os - testing vectorizer with -Os on chromebook, found no big differences == Issues == None == Plan == * Phoronix - Store the base runs somewhere (people.linaro?) and have the script install them to compare with any run on the board. - Think of a way to put bootstrap & phoronix in LAVA/CBuild (whatever is easier), so I can use the calxeda nodes without worry if they'll be up or down * Pandaboard - Use GCC 4.8 on linaro-panda-02 and hope to solve the problem * CBuild - Finish LLVM+Clang change (merge pending) and try to run some benchmarks with it * PerfDB - Install website locally, try to cook some analysis

12 years, 11 months

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[ANNOUNCE] Linaro GCC 4.8 and 4.7 2013.06 released

by Rob Savoye

The Linaro Toolchain Working Group is pleased to announce the 2013.05 release of Linaro GCC 4.8 and Linaro GCC 4.7. Linaro GCC 4.8 2013.05 is the third release in the 4.8 series. Based off the latest GCC 4.8.0+svn200019 release, it includes performance improvements and bug fixes. Linaro GCC 4.7 2013.06 is the 15th release in the 4.7 series. Based off the latest GCC 4.7.3+bzr115076 release, this is the first release after entering maintenance. The source tarball is available from: https://launchpad.net/gcc-linaro/+milestone/4.7-2013.06 https://launchpad.net/gcc-linaro/+milestone/4.8-2013.06 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

12 years, 11 months

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[ANNOUNCE] Linaro binutils 2.23.2 2013.06 released

by Will Newton

### About Linaro binutils Linaro binutils is a release of the GNU binutils with bug fixes and enhancements for ARM platforms. GNU binutils is a collection of tools including the `ld` linker and `as` assembler. ### Linaro binutils 2.23.2 2013.06 The Linaro Toolchain Working Group is pleased to announce the 2013.06 release of Linaro binutils 2.23.2, the first release in the 2.23 series. This release is based on the latest GNU binutils 2.23 stable branch, but with additional features and bug fixes. #### Additional Features * None #### Bug Fixes * Bug fix for ARM support of GNU indirect functions ### Source #### Release Tarball * https://releases.linaro.org/13.06/components/toolchain/binutils-linaro #### Development Tree * git://git.linaro.org/toolchain/binutils.git This release was built from the `linaro_binutils-2_23_2-2013_06_release` tag. ### Feedback and Support Subscribe to the important Linaro mailing lists and join our IRC channels to stay on top of Linaro development. * Linaro Toolchain Development [mailing list](http://lists.linaro.org/mailman/listinfo/linaro-toolchain) * Linaro Toolchain IRC channel on irc.freenode.net at `#linaro-tcwg` * Questions? [ask Linaro](http://ask.linaro.org/). * Interested in commercial support? inquire at [Linaro support](mailto:support@linaro.org) -- Will Newton Toolchain Working Group, Linaro

12 years, 11 months

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[ANNOUNCE] Linaro newlib 2.0.0 2013.06 released

by Will Newton

### About Linaro newlib Linaro newlib is a release of the newlib C library with bug fixes and enhancements for ARM platforms. newlib is a small footprint C library designed for embedded systems. ### Linaro newlib 2.0.0 2013.06 The Linaro Toolchain Working Group is pleased to announce the 2013.06 release of Linaro newlib 2.0.0, the first release in the 2.0.0 series. This release is based on the latest upstream newlib trunk, but with additional features and bug fixes. #### Additional Features * Faster memcpy implementation for hardware with NEON or VFP support. #### Bug Fixes * None ### Source #### Release Tarball * https://releases.linaro.org/13.06/components/toolchain/newlib-linaro #### Development Tree * git://git.linaro.org/toolchain/newlib.git This release was built from the `linaro_newlib-2_0_0-2013_06_release` tag. ### Feedback and Support Subscribe to the important Linaro mailing lists and join our IRC channels to stay on top of Linaro development. * Linaro Toolchain Development [mailing list](http://lists.linaro.org/mailman/listinfo/linaro-toolchain) * Linaro Toolchain IRC channel on irc.freenode.net at `#linaro-tcwg` * Questions? [ask Linaro](http://ask.linaro.org/). * Interested in commercial support? inquire at [Linaro support](mailto:support@linaro.org) -- Will Newton Toolchain Working Group, Linaro

12 years, 11 months

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[ANNOUNCE] Linaro eglibc 2.17 2013.06 released

by Will Newton

### About Linaro eglibc Linaro eglibc is a release of the eglibc C library with bug fixes and enhancements for ARM platforms. eglibc is a variant of the GNU libc designed to work well on embedded systems. ### Linaro eglibc 2.17 2013.06 The Linaro Toolchain Working Group is pleased to announce the 2013.06 release of Linaro eglibc 2.17, the first release in the 2.17 series. This release is based on the latest upstream eglibc 2.17 stable branch, but with additional features and bug fixes. #### Additional Features * Faster memcpy implementation for hardware with NEON or VFP support. #### Bug Fixes * None ### Source #### Release Tarball * https://releases.linaro.org/13.06/components/toolchain/eglibc-linaro #### Development Tree * git://git.linaro.org/toolchain/eglibc.git This release was built from the `linaro_eglibc-2_17-2013_06_release` tag. ### Feedback and Support Subscribe to the important Linaro mailing lists and join our IRC channels to stay on top of Linaro development. * Linaro Toolchain Development [mailing list](http://lists.linaro.org/mailman/listinfo/linaro-toolchain) * Linaro Toolchain IRC channel on irc.freenode.net at `#linaro-tcwg` * Questions? [ask Linaro](http://ask.linaro.org/). * Interested in commercial support? inquire at [Linaro support](mailto:support@linaro.org) -- Will Newton Toolchain Working Group, Linaro

12 years, 11 months

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[ANNOUNCE] Linaro QEMU 2013.06 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2013.06. Linaro QEMU 2013.06 is the latest release of qemu-linaro. Based off upstream (trunk) QEMU, it includes a number of ARM-focused bug fixes and enhancements. This release has been updated to be based on upstream's recent 1.5.0 release. Interesting ARM related upstream changes include fixes to the VersatilePB and Realview model PCI controller, improved performance of emulation of ARM targets, and working VM save/load for vexpress-a15 and vexpress-a9 board models. The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2013.06 More information on Linaro QEMU is available at: https://launchpad.net/qemu-linaro -- PMM

12 years, 11 months

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[ACTIVITY] 3-7 June 2013

by Christophe Lyon

== Progress == * Merges for linaro-4.8-2013.06 and linaro-4.7-2013.06 - Spent most of my time on this activity, with Yvan - A few cbuild issues, local disk full, and other local disk crash - Investigating why the cross-validations lack libpthread and libdl (required since libsanitizer backport). The libs are present, but not found by the compiler. * Registered for Connect/Dublin == Next == * Complete merges quickly, to enable release this week. * Disable-peeling: resume work * Better end of loop counter optim: discuss with Kugan * libsanitizer/aarch64: resume work * Neon intrinsics/vzup/veor: resume work * Book hotel/flight for Connect/Dublin

12 years, 11 months

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[ACTIVITY] Week 23

by Yvan Roux

== Issues == * None. == Progress == * Releases merge reviews: - Most of the week spent on this activity - Lot of reviews and cbuild issues - some reviews still on-going * Jira cards: - Closed card #108 on Tiny memory model support. - Created Card #167 for TLS support in the Tiny memory model. * LRA on ARM and AArch64: - Raise the issue to LRA maintainer (Vladimir Makarov) - will iterate with him in the coming weeks. * Launchpad bug #1187247 - started to look at it. == Plan == * Finishing reviews * Bug #1187247 * LRA

12 years, 11 months

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[ACTIVITY] 03-07 June 2013

by Venkataramanan Kumar

== Progress == * AARCH64 testing Drilling down Boot strap failure with GCC 4.9 trunk on open embedded image with V8 model Sent the steps to reproduce boot strap failure in the model to team. Renoto suggestion to add libgcc_eh.a explicilty is not working well at all places. Trying few other options (LDFLAGS, --with-stage1-libs ) to pass libgcc_eh.a to the xg++ build. * libssp support for Aarch64 Wrote down the steps needed to implement the support in Aarch64. Sent mail to Matt for a review. Working on machine descriptions for stack_protect_set and stack_protect_test. * Filled online VISA Application form. Collected Relevent documents needed. Hotel rooms are not available via online booking. Sent follow up mail to the hotel and informed James and Arwen. == Plan == * Continue bootstrap testing and push patches to GCC * Implement Libssp GCC back end hooks. * Linaro connect travel prep, book tickets hotel and apply visa.

12 years, 11 months

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[ACTIVITY] week 23

by Rob Savoye

== Progress == * Did builds of GCC 4.6, 4.7, 4.8, 4.9-svn on x86_64, i686, arm7l to load more recent data into testing database plus test source builds for the release at the same time. * Did builds of GDB 7.6 & 7.5 on x86_64, i686, arm7. * Added wiki page on how to run DejaGnu in a chroot. * Cbuildv2 work continuing, works well enough to do the above builds plus bootstrapping infrastructure. * Change how the index for the testing database gets calculated, so it's now possible to delete bogus records without screwing up existing data when importing. == Plan == * Produce some new graphs with the data from the above builds and test runs. * Make GCC & GDB release tarballs. * Update wiki pages on Cbuildv2, release process. == Issues == * Figure out why make check for GDB fails for everything on chromebook running 13.04. - rob -

12 years, 11 months

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[ACTIVITY] 3 - 7 June 2013

by Omair Javaid

== Progress == * Investigated gdb.threads and gdb.multi failures and submitted patch to enable tests requiring multiple hardware breakpoints on arm targets. * Investigate gdb.base failures and submitted patch to enable disp-step-syscall.exp for arm targets. * Investigate gdb.mi and gdb.trace failures, some of problems are feature requests on arm. * Investigate gdb.base failures and submitted patch to enable disp-step-syscall.exp for arm targets. * Submitted gdb.dwarf2 pending patch. == Plan == * Try to fix remaining gdb failures. * Generate a fresh copy of gdb test suite results on arm and x86 * Chromebook os update on a faster sd card. * Add JIRA cards for gdb features missing on arm. * Follow up on Ireland visa application.

12 years, 11 months

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[ACTIVITY] 2 - 7 June

by Kugan

== Progress == * Better end of loop counter optimisation - Experimented with fixing the extra instruction. - Found a possible way to fix it. Discussing it with Christophe. * Generate a single call to divmod - Looked at the code including how sin()/cos() -> sincos() handling in gcc. - Implemented a prototype and experimented. == Plan == * VRP based zero/sign extension - Ping the patch. * Generate a single call to divmod. - Finish the prototype implementation and get the regression working - Discuss in gcc mailing list for a good way to implement and get consensus with the results from prototype.

12 years, 11 months

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[ACTIVITY] Week 23

by Zhenqiang Chen

== Issues == * None == Progress == * Test and send out shrink wrapping improvement patch for review (TCWG-133). * Update aarch64-none-elf TARGET_CFLAGS to " -g -O2 ". * Enable aarch64 gdb build for Windows (lp:1187862). * Investigate conditional compare RTL representation. - Trying to expand it to cmp_and/cmp_ior like instruction. == Plan == * Continue on conditional compare. == Planed leaves == * June 10-12: Dragon Boat Festival.

12 years, 11 months

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[ACTIVITY] Week 23

by Will Newton

== Progress == * Fixed gdb.cp testsuite failures and committed upstream. * Worked with ITS to get git mirrors for libraries & tools. * Started documenting branch and merge policy on the wiki. * Respin AArch64 binutils ifunc patch and commit. * Looked into AArch64 assembler issue. * Assorted other gdb testsuite fixes. * Some research into malloc. == Issues == * None. == Plan == * Create release branches for libraries & tools and improve docs. * More gdb fixes. * More malloc reading. -- Will Newton Toolchain Working Group, Linaro

12 years, 11 months

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[ACTIVITY] Week 23

by Renato Golin

`== Progress == * Release 3.3 - Testing and packaging RC3 http://llvm.org/pre-releases/3.3/rc3/ * Bootstrap Script - Check dependencies, checkout sources, bootstraps, test-suite, package - Works well on Intel (1h20min bootstrap twice + test-suite) - Works on Claxeda, Chromebook (10hs each) - Should work out-of-the-box anywhere: http://people.linaro.org/~rengolin/llvm/scripts/ * Buildbot - Following up on GCC/LD failure on linaro-panda-02 * CBuild - Adding Clang/Extra/RT to toolchain64.lab + update scripts, waiting for merge - Hopefully next build will get the whole pack * Phoronix - Setting up environment on my Chromebook, I'll have to think how to do that automatically - Running some base runs (gcc 4.6), still not automatic enough * LLVM administrativia - Reviewing patches, support, etc == Issues == * Network QoS is required to run buildbots, many failures due to timeout every week. The more bots we run, the more urgent will be this issue. == Plan == * Find a way to run Phoronix without human interaction (batch mode), and write a script to do that * Store the base runs somewhere (people.linaro?) and have the script install them to compare with any run on the board. * Test and release 3.3 Final * Use GCC 4.8 on linaro-panda-02 and hope to solve the problem * Finish LLVM+Clang change in CBuild (merge pending) and try to run some benchmarks with it * Think of a way to put bootstrap & phoronix in LAVA/CBuild (whatever is easier), so I can use the calxeda nodes without worry if they'll be up or down

12 years, 11 months

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Failure to optimise (a/b) and (a%b) into single __aeabi_idivmod call

by Kugan

Hi, I am looking at best approach for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43721 - Failure to optimise (a/b) and (a%b) into single __aeabi_idivmod call in ARM architecture In sumary, the following c code results in __aeabi_idivmod() call and one __aeabi_idiv() call even though the former already calculates the quotient. int q = a / b; int r = a % b; return q + r; My question is what would be the best way to handle it. As I see there are few options with some issues. 1. Handling in gimple level, try to reduce the operations to equivalent of this. We should do this for the targets without integer divide. {q, r} = a % b; Gimple assign stmts have only one lhs operation (?). Therefore, lhs has to be made 64bit to signify return values of R0 and R1 returned together. I am not too sure of any implications on other architectures here. 2. Handling in expand_divmod. Here, when we see a div or mod operation, we will have to do a linear search to see if there is a valid equivalent operation to combine. If we find one, we can generate __aeabi_idivmod() and cache the result for the equivalent operation. As I see, this can get messy and might not be acceptable. 3. An RTL pass to process and combine these library calls. Possibly using cse. I am still looking at this. 4. Ramana tried a prototype to do the same using target pattens. He has ruled this out. (if you want more info, please refer to at https://code.launchpad.net/~ramana/gcc-linaro/divmodsi4-experiments) Any suggestion for best way to handle this? Thanks, Kugan

12 years, 11 months

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GCC bootstrap build error with openembedded/v8 model

by Venkataramanan Kumar

Hi all, I am facing build error, when I try to bootstrap GCC trunk for native aarch64-unknown-linux-gnu configuration in openemedded/V8 model. Linker error occurs while building stage 1 GCC. (Snip) /usr/lib/gcc/aarch64-oe-linux/4.7.3/../../../../aarch64-oe-linux/bin/ld: gcov: hidden symbol `__deregister_frame_info' in /usr/lib/gcc/aarch64-oe-linux/4.7.3/../../../aarch64-oe-linux/4.7.3/libgcc_eh.a(unwind-dw2-fde-dip.o) is referenced by DSO /usr/lib/gcc/aarch64-oe-linux/4.7.3/../../../../aarch64-oe-linux/bin/ld: final link failed: Bad value collect2: error: ld returned 1 exit status (Snip) The steps to reproduce the issue is attached. Need some help to solve this. regards, Venkat.

12 years, 11 months

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[ACTIVITY] 27-31 May 2013

by Christophe Lyon

== Progress == * Neon intrisincs: compiled my testsuite with GCC/trunk and filed bugzilla 57431 for ICE. * Merges for linaro-4.8-2013.06: started actual merges - fixed a cbuild reporting problem - faced calxeda and e2c problems, fixed by Matt. * Jira: a few updates * Libsanitizer: patched upstream, to be backported in GCC/trunk, then in gcc-linaro-4.8. == Next == * Merges for linaro-4.8-2013.06: complete them. * Disable-peeling: resume * Look at Kugan question about trunk regression * Libsanitizer/aarch64: resume * PGO/LTO/python bug: resume * Neon intrinsics/vzup/vero: resume

12 years, 11 months

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[ACTIVITY] 27 - 31 May 2013

by Omair Javaid

== Progress == * Investigated attach to process and threads failures (TCWG-95<http://cards.linaro.org/browse/TCWG-95>). Almost all problems were fixed with any patch by making an os configuration change on chromebook. * Ran GDB test suites after OS configuration change on chromebook and updated test results. * Investigated inline-break.exp test suite failures on arm. GDB seems to be missing one inlined instance on two different functions. Obtained debug info and dumps of obj file without any luck to find the possible cause and fix. * Started work on integration of different testing scripts. Initially added commandline options in bash script to test let user choose target/host, native-none/native-gdbserver/remote, and testsuite/testcase configurations. == Plan == * Figure out a reason/solution for inline-break.exp failures on arm. * Investigate and Fix more ARM bugs shown in gdb 7.6 testsuite results. * Chromebook os update on a faster sd card. * Side activity work on automation of testing gdb in different configurations and uploading comparison result.

12 years, 11 months

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[ACTIVITY] Week 22

by Yvan Roux

== Issues == * None. == Progress == * LRA on ARM and AArch64: - Tried to workaround the issue with new insns (reload_outdi,...). - But it doesn't seem to be handle by LRA. - Debug still ongoing. * Internal meetings == Plan == * Releases merge reviews * LRA

12 years, 11 months

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[ACTIVITY] 27-31 May 2013

by Venkataramanan Kumar

== Progress == Very short week (monday and wednesday off). * AARCH64 testing Got boot strap failure with GCC 4.9 trunk on open embedded image with glibc changes. Retired with latest openembedded image on V8 model Noted down the steps to reproduce boot strap failure in the model for broadcasting. * libssp support for Aarch64 Read documentation to understand and evaluate the work. == Plan == * Continue bootstrap testing and push patches to GCC * Implement Libssp GCC back end hooks. * Linaro connect travel prep, book tickets hotel and apply visa.

12 years, 11 months

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[ACTIVITY] 27-31 May 2013

by Kugan

== Progress == * VRP based zero/sign extension - Tested and posted the latest patch * Better end of loop counter optimisation - Tree level optimization are optimized in mainline - Christophe noted a slight change in asm generated from earlier version - tracked down the patch causing this and communicated this. * Generate a single call to divmod - Looked at expand_divmod to understand how __aeabi_idiv and __aeabi_idivmod are generated. == Plan == * Better end of loop counter optimisation - Change the pattern to remove this additional instruction if necessary. * Generate a single call to divmod - Come up with a solution

12 years, 11 months

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[ACTIVITY] Week 22

by Zhenqiang Chen

== Issues == * None == Progress == * Shrink wrapping improvement (TCWG-133) - Call copyprop to optimized the parameter register move instructions. - Test is ongoing. * Update aarch64-none-elf toolchain newlib version to 2.0~20130530 (lp:1185711). == Plan == * Collect performance data for TCWG-133. * Continue on conditional compare. Best Regards! -Zhenqiang

12 years, 11 months

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[ACTIVITY] for week 22

by Rob Savoye

== Progress == * Monday holiday here too, so went mountain climbing * Finally fixed Lava token for cbuild * Dug into EC2 issues, still confused * Cloned infrastructure files from gcc.gnu.org, which turned out to be out of date, so updated them to the current releases. That then required fixing a few minor configure bugs in libppl. Files in ~/cbuild/var/snapshots/infrastructure. Infrastructure libs are statically linked so they're consistent across platforms. * Worked on cbuildv2, it now downloads a tarball or does a bzr|git|svn checkout, configures, compiles, and installs them in a sysroot as other packages depend on them. Also added a function to download, build, and install all the toolchain infrastructure libraries in a sysroot for binutils & GCC to use at build time https://git.linaro.org/gitweb?p=people/rsavoye/cbuild2;a=summary * Automated import of all historical test results till running. Currently the DB has 137,687,996 test results, 1909 separate test runs of GCC, and covering 544 versions. == Plan == * Add remote SSH support to DejaGnu for remote testing on Chromebook. (carried over from this week) * Figure out the EC2 mess and document it better * Clone gcc_release.sh script but enhance so a similar process can be applied to releasing Eglibc, Newlib, and the Binutils. * Start gearing up for the releases * Finish cross build and testing support in Cbuildv2, which would basically eliminate the need for crosstool-ng.

12 years, 11 months

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[ACTIVITY] Week 22

by Will Newton

== Progress == * 4 day week due to bank holiday. * Merged binutils arm ifunc changes onto stable branch. * Worked on getting some git mirrors setup for various toolchain deliverables. * A certain amount of planning and JIRA card work in preparation for the next iteration. * Fixed aarch64_be-* and aarch64-elf testsuite issues with AArch64 ifunc patch. * Investigated glibc malloc and alternatives. == Issues == * None. == Plan == * Submit new AArch64 ifunc patch after testing complete. * Finish getting git mirrors setup. * Look at some gdb testsuite failures. -- Will Newton Toolchain Working Group, Linaro

12 years, 11 months

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[ACTIVITY] report week 22

by Peter Maydell

[very short week; two days] Progress: * misc ** handover from John Rigby: got a QEMU+KVM+AArch64 setup running with his work-in-progress patchset ** tracked down weird behaviour when ^C'ing qemu on aarch64 to a bug in glibc's getcontext() implementation (it doesn't clear the PSTATE field and ends up passing a garbage pstate to the rt_sigreturn syscall) Plans: * VIRT-55: talk to Andre about testing; investigate testing migration using LAVA * set up a new qemu-linaro tree/branch as our CI/LAVA input [to keep it separate from our "we release this" tree] * restart work on upstreaming omap3 patches as part of my generic qemu maintenance work (will reduce our maintenance burden in the long term) -- PMM

12 years, 11 months

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[ACTIVITY] Week 22

by Renato Golin

== Progress == * 3.3 Release - RC2 is out, we'll have an RC3 (critical bug on X86_64/Darwin) - Adding some docs to the release * Infrastructure - Installing Ubuntu on Chromebook, automating bootstrap+test-suite - Running the test-suite on a BeagleBoard (LLVM 3.2 and 3.3), no regressions - Trying to run an LLVM CBuild job * Buildbots - Chasing GCC internal failure on self-host bot - Chasing more MCJIT failures on all bots == Issues == - Upgrading to 13.04 was a big mistake, had to rollback to 12.10 and re-configure my whole environment - Office network/power grid is insufficient for the current population, I'll be working from home from now on == Plan == * Continue with CBuild for LLVM * Setup continuous build for bootstrap+test-suite * Automate Phoronix, setup CI * If CBuild is done, try running benchmarks with LLVM on it * As hardware become available, set them up as buildbots

12 years, 11 months

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alignment trap on small inline memcpy

by William Mills

We are using the Linaro prebuilt binary 2013.03 toolchain. We have a program that does a memcpy of 6 bytes and the source and destination pointers are both 6 byte arrays (through multiple levels of struct & union etc). At -O2 we get the memcpy inlined. The code area in question is: 22840: f8b7 2054 ldrh.w r2, [r7, #84] ; 0x54 22844: f853 1d12 ldr.w r1, [r3, #-18]! 22848: f042 0202 orr.w r2, r2, #2 2284c: 889b ldrh r3, [r3, #4] 2284e: b292 uxth r2, r2 ->22850: f8c7 101a str.w r1, [r7, #26] 22854: f8a7 2054 strh.w r2, [r7, #84] ; 0x54 22858: 83fb strh r3, [r7, #30] 2285a: f8da 3000 ldr.w r3, [sl] And we get an alignment fault at the str.w marked above. Looking at the types involved and their location in the containing structures I don't see how the compiler could think that the destination was word aligned (I believe it is guaranteed that dest % 8 == 6) There are no -march -mcpu or -mtune params passed to the compiler. The code is running in user space on a A15. Basic question before we look further: Is the compiler assuming that cp15 SCTLR.A is 0 so that it is free to generate unaligned loads and stores? If the answer to the above is "no" we can isolate the code more and bring it back to the list. Thanks, Bill --------------------------------------- William A. Mills Chief Technologist, Open Solutions, SDO Texas Instruments, Inc. 20450 Century Blvd Germantown MD 20878 240-643-0836

12 years, 11 months

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[ANNOUNCE] Linaro Toolchain binaries 2013.05 released

by Bernhard Rosenkränzer

The Linaro Toolchain and Platform Working Groups are pleased to announce the 2013.05 release of the Linaro Toolchain Binaries, a pre-built version of Linaro GCC and Linaro GDB that runs on generic Linux or Windows and targets the glibc Linaro Evaluation Build. Uses include: * Cross compiling ARM applications from your laptop * Remote debugging * Build the Linux kernel for your board What's included: * Linaro GCC 4.8 2013.05 * Linaro GDB 7.6 2013.05 * A statically linked gdbserver * A system root * Manuals under share/doc/ The system root contains the basic header files and libraries to link your programs against. Interesting changes include: * gcc 4.7 is no longer included * gdb is updated to 7.6 * Linux release file names no longer include a date to make life easier for scripted downloads * ISL/CLooG support is enabled in all builds The Linux version is supported on Ubuntu 10.04.3 and 12.04, Debian 6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation 5.7 and later, and should run on any Linux Standard Base 3.0 compatible distribution. Please see the README about running on x86_64 hosts. The Windows version is supported on Windows XP Pro SP3, Windows Vista Business SP2, and Windows 7 Pro SP1. The binaries and build scripts are available from: https://launchpad.net/linaro-toolchain-binaries/trunk/2013.05 Need help? Ask a question on https://ask.linaro.org/ Already on Launchpad? Submit a bug at https://bugs.launchpad.net/linaro-toolchain-binaries On IRC? See us on #linaro on Freenode. Other ways that you can contact us or get involved are listed at https://wiki.linaro.org/GettingInvolved.

12 years, 11 months

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Linaro-toolchain-builds rebuilding sysroot

by BHARATH H S

Hi, I have a usecase where linaro toolchain is used to build my executables and the sysroot is copied and used as glibc for running my embedded system. Reason for this is, I want to use the same glibc what the application is compiled against. I found a bug fix from glibc community which I want to cherry pick and rebuild the sysroot to include this fix. But, in the README.txt published with linaro toolchain binary, there are no instructions for rebuilding sysroot. Can anyone point me to info on rebuilding sysroot? If formal steps don't exist, could you point me to the current process being followed by linaro so that I can observe the build log and attempt to do the same? Thanks Bharath

12 years, 11 months

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Malloc usage

by Matthew Gretton-Dann

All, In the Toolchain Working Group Mans has been doing some examination of SPEC 2000 and SPEC 2006 to see what C Library (glibc) routines impact performance the most, and are worth tuning. This has come up with two areas we consider worthy of further investigation: 1) malloc performance 2) Floating-point rounding functions. This email is interested with the first of these. Analysis of malloc shows large amounts of time is spent in executing synchronization primitives even when the program under test is single-threaded. The obvious 'fix' is to remove the synchronization primitives which will give a performance boost. This is, of course, not safe and will require reworking malloc's algorithms to be (substantially) synchronization free. A quick Google suggests that there are better performing algorithms available (TCMalloc, Lockless, Hoard, &c), and so changing glibc's algorithm is something well worth investigating. Currently we see around 4.37% of time being spent in libc for the whole of SPEC CPU 2006. Around 75% of that is in malloc related functions (so about 3.1% of the total). One benchmark however spends around 20% of its time in malloc. So overall we are looking at maybe 1% improvement in the SPEC 2006 score, which is not large given the amount of effort I estimate this is going to require (as we have to convince the community we have made everyone's life better). So before we go any further I would like to see what the view of LEG is about a better malloc. My questions boil down to: * Is malloc important - or do server applications just implement their own? * Do you have any benchmarks that stress malloc and would provide us with some more data points? But any and all comments on the subject are welcome. Thanks, Matt -- Matthew Gretton-Dann Toolchain Working Group, Linaro

12 years, 11 months

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Debuggin from Eclipse

by Paul Claessen

Greetings, I'm using the Linaro tool chain with Eclipse (Juno) (under Windows) and openOCD to write firmware for an STM32F20x based design (using an ST-Link2 debugger). In general, that all works fairly well. The part I'm having problems with is debugging (step-in, etc) from Eclipse. The execution flow seems chaotic when single stepping through C code: it skips statements, it jumps into the middle of a function, then returns to the start of a function, it loops over certain statements (while there's no loop in the code), etc. (It's close to useless). I have seen this behavior with other IDE's and tool chains when code was built with optimization turned on. However, I specify 'no optimization' (-O0) when I build my code. My questions: a) Is there some implicit optimization being done in the compiler, even though I tell it not to do so, which may affect proper debugging? b) Are other people using Eclipse (Juno) and are they seeing the same issue? Are there any known ways to fix this chaotic debugger behavior? Kind regards, ~ Paul Claessen

12 years, 11 months

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[ACTIVITY] 21 - 24 May 2013

by Omair Javaid

== Progress == * Performed investigation on gdb7.6 test suite failures and untested test cases. * Updated JIRA enteries with test suite failures on arm to track progress. * Wrote an automation script for selection of individual test cases from a text file. * Got the gdb.dwarf2 test suite patch reviewed from Matt and Will. * Day off on Friday. == Plan == * Finish up initial investigation on gdb7.6 test suite results. * Complete updates of JIRA enteries after investigation on test suite results in complete. * Start work on integration of different testing scripts written in past couple of months. * Send gdb.dwarf2 test suite patch upstream.

12 years, 11 months

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linaro-toolchain