- linaro-toolchain - lists.linaro.org

[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

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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

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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

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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

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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

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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

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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

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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