linaro-toolchain

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5485 discussions

[ACTIVITY] week ending 20 Jan 2019

by Richard Henderson

[VIRT-344 # ARMv8.5-MemTag, Memory Tagging Extension ] Posted v1. [VIRT-327 # Richard's upstream QEMU work ] Posted v6 of linux-user split. Based on Laurent's feedback, I'm running LTP myself this time, at least for a few guests. r~

5 years, 10 months

[ACTIVITY] week ending Jan. 20 2019

by Alex Bennée

Upstream Work ([VIRT-109]) ========================== - posted {PULL 0/5} gitdm updates with final 2018 stats Message-Id: <20190114160956.7513-1-alex.bennee(a)linaro.org> - posted {PULL 00/21} misc testing fixes for Travis and docker Message-Id: <20190114150129.1013-1-alex.bennee(a)linaro.org> - we have gone green again - posted {PULL 0/7} check-softfloat, fp-bench and clang compile fixes Message-Id: <20190117132703.17790-1-alex.bennee(a)linaro.org> - some alt-OS issues and a weird failure on s390x - spent some time getting a working s390x setup to investigate - posted {PATCH} target/s390x: define TCG_GUEST_DEFAULT_MO for MTTCG Message-Id: <20190118171848.27332-1-alex.bennee(a)linaro.org> - need to investigate why s390x breaks so weirdly - messed around with a little [CONFIG_TCG type cleanups] - need to finish the re-work of [system test and misc arch] tests :todo - will be useful for test cases for plugins - also more test cases queued up for system tests - respin {PATCH v3 0/5} support reading some CPUID/CNT registers from user-space Message-Id: <20180625160009.17437-1-alex.bennee(a)linaro.org> :todo - in branch [v3 branch] [VIRT-109] https://projects.linaro.org/browse/VIRT-109 [CONFIG_TCG type cleanups] https://github.com/stsquad/qemu/tree/misc/config-tcg-cleanups [system test and misc arch] https://github.com/stsquad/qemu/tree/testing/enable-system-tcg-tests-v2 [v3 branch] https://github.com/stsquad/qemu/tree/misc/cnt-and-misc-reg-fixes-v3 Other Tasks =========== - wrote up and submitted abstract for Connect - I still hope to the history of TCG for TCWG room as well Completed Reviews [4/4] ======================= {Qemu-devel} {PATCH} .cirrus.yml: basic compile and test for FreeBSD Message-Id: <CAPyFy2Dw2F3ks_5f8cvWjrsOTS0_Ybr5kELUpyHQmOQWUaeuFg(a)mail.gmail.com> - CLOSING NOTE [2019-01-16 Wed 15:01] Adds FreeBSD testing, yet another CI system {PATCH v2} softfloat: enforce softfloat if the host's FMA is broken Message-Id: <20181225070305.18221-1-cota(a)braap.org> - CLOSING NOTE [2019-01-16 Wed 15:03] Queued to my tree {PATCH v6 0/3} Dynamic TLB sizing Message-Id: <20190114165017.27298-1-cota(a)braap.org> - CLOSING NOTE [2019-01-17 Thu 10:53] Found a few issues. {PATCH v7 0/3} Dynamic TLB sizing Message-Id: <20190116170114.26802-1-cota(a)braap.org> - CLOSING NOTE [2019-01-18 Fri 16:54] Looks good to me now. Absences ======== - Connect BKK19 (1-5th April 2019) - holiday after Connect Current Review Queue ==================== * {PATCH 0/2} contrib: gitdm: Some updates Message-Id: <1547807155-4526-1-git-send-email-aleksandar.markovic(a)rt-rk.com> * {PATCH 00/18} Acceptance Tests: target architecture support Message-Id: <20190117185628.21862-1-crosa(a)redhat.com> * {Qemu-devel} {PATCH 00/11} target/arm: Implement ARMv8.5-BTI Message-Id: <20190110121736.23448-1-richard.henderson(a)linaro.org> * {PATCH v5 00/73} per-CPU locks Message-Id: <20181213050453.9677-1-cota(a)braap.org> * {RFC v2 00/38} Plugin support Message-Id: <20181209193749.12277-1-cota(a)braap.org> * {RFC} arm: Allow system registers for KVM guests to be changed by QEMU code Message-Id: <20181206151401.13455-1-peter.maydell(a)linaro.org> -- Alex Bennée

5 years, 10 months

[ACTIVITY] report week ending 18 Jan

by Peter Smith

[LLVM-521] LLD and taking the address of an ifunc Went through the possible combinations (pic, pie, non-pic, exec, shared,...) found one relocation that gcc uses that clang doesn't, hence mc and LLD don't support. Raised upstream pr. Also found that clang's code-sequence for -fpie doesn't seem to guarantee ifunc pointer equivalence when linking -fpie (non-got generating sequence used when ifunc is in same translation unit). Will need some further investigation to confirm. [LLVM-499] Support for linking the linux kernel Committed -pic-veneer support and associated overflow fix, now merged to 8.0 branch. Other: - Started work on Fosdem presentation on LLD performance. Studying ld.bfd and ld.gold source code to look for structural differences between them and LLD. - Submitted presentation for next Linaro Connect - Review for comdat group and unused section elimination. - On buildbot duty.

5 years, 10 months

[ACTIVITY] report week ending 18 Jan

by Peter Maydell

Progress: * VIRT-65 [QEMU upstream maintainership] + some code review, and another arm pull-request (including RTH's pointer auth work) + sent patch fixing a bug in the gdbstub memory access path that meant it was always making accesses as NonSecure even if the guest CPU was currently Secure + sent patch fixing checkpatch to not wrongly complain about block comments starting "/**" * VIRT-268 [QEMU support for dual-core Cortex-M Musca board] + I have a model of the SSE-200 subsystem used by the Musca board, and a model of the MPS2 AN521 FPGA image which uses it. (Since it is basically "our existing MPS2 AN505 model, but with SSE-200 rather than IoTKit" it's a useful stepping stone to the Musca board.) There are still some bugs and missing features, but it seems to mostly be functional (it can run the ARM Trusted Firmware M test binary.) thanks -- PMM

5 years, 10 months

[ACTIVITY] 14-18 January 2019

by Christophe Lyon

== Progress == * FDPIC - (GNU-411) GDB: gdbserver did not start because of a qemu-user feature. Worked around it. * GCC upstream validation: - reported a few regressions - dealing with some random results, still - qemu-3.1 memory consumption. Got some clarifications from IT team about LSF reports.. It seems qemu-3.1 consumes more memory in some cases, though. * GCC: - (GNU-99) rebased ubsan / bare-metal patches. No progress. - (GNU-597) Fixed arm testcase. - PR 85596 committed doc fix * misc (conf-calls, meetings, emails, ....) - reviewing/submitted infra script patches - dealing with nasty ST-internal infrastructure problems - (GNU-592): improved benchmarking scripts - experimenting with new build servers - ran Linaro binary toolchain tests on gcc-arm release, filled a few bug reports == Next == FDPIC: - GCC: handle feedback on v4 patches - GDB: update patches - uclibc-ng: look at how to test fdpic mode with openadk Validation: - isolate if/why qemu-3.1.0-rc3 consumes more memory than 2.11 for aarch64-linux target

5 years, 10 months

[ACTIVITY] 14 - 18 January 2019

by Diana Picus

== Progress == * [ARM GlobalISel] Select complicated G_CONSTANT [LLVM-491] - Committed upstream * [ARM & Thumb GlobalISel] Support calls to vararg functions [LLVM-490] - This gets rid of all the fallbacks in the test-suite related to calls to printf (which is a lot) - Committed upstream * Use new version of GCC on buildbots [LLVM-515] - Fiddled with this a bit, but couldn't test much due to dockerd being broken for a couple of days - Manual installation of g++-7 from PPA works, but when trying the same steps in the dockerfile it keeps restarting; need to investigate why == Plan == * More of the same

5 years, 10 months

[ACTIVITY] 14 January - 18 January 2019

by Prathamesh Kulkarni

== Progress == * SVE ACLE (6/10) - Committed patch for svlsl_wide. * GCC bugs (1/10) - PR88788: Infinite loop in malloc_candidate_p_1: Fixed in r267933 * Public holiday (2/10) * Misc (1/10) - Meetings == Next Week == - Continue ongoing tasks.

5 years, 10 months

[ANNOUNCE] Linaro Binary Toolchain Release-Candidate GCC 7.4-2019.02-rc1

by Mark Murray

The Linaro Binary Toolchain ============================ The Linaro GCC 7.4-2019.02-rc1 Release-Candidate is now available. *Notice*: GCC 7.1 ABI change for arm*-*-* targets, and note for aarch64*-*-* targets From GCC 7.1 release notes: On ARM targets (arm*-*-*), a bug introduced in GCC 5 that affects conformance to the procedure call standard (AAPCS) has been fixed. The bug affects some C++ code where class objects are passed by value to functions and could result in incorrect or inconsistent code being generated. This is an ABI change. If the option -Wpsabi is enabled (on by default) the compiler will emit a diagnostic note for code that might be affected. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728 GCC 5 and GCC 6 releases will continue to be affected by the ABI bug, since changing ABI in these releases is not practical. A warning enabled by -Wpsabi option was added to GCC 5 and GCC 6 toolchains to diagnose codebases that might be affected by the ABI bug. Additionally, this same bug was present in AArch64 backend in development versions of GCC 7. There was no releases of GCC with this bug present in AArch64 backend, therefore the release notes does not mention this. However, be advised that any code bases built with development versions of GCC 7 need to be recompiled with released version of GCC 7 to conform to ABI. For an explanation of GCC 7 series changes please see the following website: https://gcc.gnu.org/gcc-7/changes.html For help in porting to GCC 7 please see the following explanation: https://gcc.gnu.org/gcc-7/porting_to.html Download release-candidate packages from: (sources) http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.4-2019.02-rc1/ (binaries) http://snapshots.linaro.org/components/toolchain/binaries/7.4-2019.02-rc1/ Previous snapshots and release-candidates are at: http://snapshots.linaro.org/components/toolchain/binaries/ Previous releases are at: http://releases.linaro.org/components/toolchain/binaries/ A description of the arm and AArch64 target triples can be found at: https://collaborate.linaro.org/display/TCWGPUB/ARM+and+AArch64+Target+Tripl… Host Requirements ================== Linaro officially supports the current and previous Ubuntu LTS releases (as of the time of this release). This does not mean that the toolchain will not work on other/older Linux distributions. See the following for the life-time of Ubuntu LTS releases. https://wiki.ubuntu.com/Releases The host system upon which the cross-compiler will run requires a minimum of glibc 2.14, because of API changes to glibc's memcpy API. https://bugs.linaro.org/show_bug.cgi?id=1869 Package Versions ================= Linaro GCC 7.4-2019.02-rc1 http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.4-2019.02-rc1/ FSF glibc 2.25 (release/2.25) https://lists.gnu.org/archive/html/info-gnu/2017-02/msg00002.html Newlib 2.5 (newlib-2_5_0 tag) https://sourceware.org/ml/newlib/2016/msg01191.html GNU Binutils 2.28 (users/linaro/binutils-2_28-branch) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=bin… FSF GDB 8.2 (gdb-8.2-branch) https://lists.gnu.org/archive/html/info-gnu/2018-09/msg00001.html Linaro toolchain package git branches are hosted at: http://git.linaro.org/toolchain NEWS for GCC 7 (as of Linaro GCC 7.4-2019.02-rc1) ================================================== * Runtest and gdbserver are no longer installed in the toolchain bin/ directory. Binary releases no longer include runtest at all, and gdbserver is a target tool; it is now shipped in the sysroot under usr/bin/. LDTS case #2211: gdbserver and runtest in GCC binary release are in the wrong place or have the wrong name * Gdbserver is no longer linked statically, because this is currently unsupported. Linaro bugzilla #3344: gdbserver broken in Linaro 2017.02 https://bugs.linaro.org/show_bug.cgi?id=3344 * The Linaro GCC 7.4-2019.01 snapshot added a fix for Linaro bug 4007: "Internal compiler error with -mcpu=thunderx2t99". * The Linaro GCC 7.2-2017.09 snapshot added float and integer moves improvement for AArch64 targets. * The Linaro GCC 7.1-2017.07 snapshot added prefetching configuration improvement for AArch64 targets and laid groundwork to enabling prefetching in more cases. * Previous MinGW hosted version of Linaro GCC C preprocessor failed to convert character set used for string, character constants, etc. This is fixed in this release. Linaro bugzilla #3040 : CC1 and cc1plus cannot convert UTF-8. https://bugs.linaro.org/show_bug.cgi?id=3040 * Performance related backports from the following snapshots have been included: Linaro GCC 7.1-2017.05, Linaro GCC 7.1-2017.06, Linaro GCC 7.1-2017.07, Linaro GCC 7.2-2017.08, Linaro GCC 7.2-2017.09, Linaro GCC 7.2-2017.10, Linaro GCC 7.2-2018.04 and Linaro GCC 7.4-2019.01. See the following Linaro GCC snapshots: http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.06/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.07/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.2-2017.08/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.2-2017.09/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.2-2017.10/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.2-2018.04/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.4-2019.01/ Contact Linaro =============== File bugs at http://bugs.linaro.org For Linaro member support see http://support.linaro.org For Linaro community support email linaro-toolchain(a)lists.linaro.org Mark Murray Staff Software Engineer | Arm . . . . . . . . . . . . . . . . . . . . . . . . . . . p: +44 1223 405082 arm.com <http://www.arm.com> IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

5 years, 10 months

[ANNOUNCE] Arm Binary A-profile Toolchain Release GCC 8.2-2019.01

by Przemyslaw Wirkus

The Arm GNU Toolchain for the A-profile Architecture ===================================================== The Arm GNU Toolchain for the A-profile Architecture 8.2-2019.01 Release is now available. Arm is pleased to announce the first Arm-built release of the pre-built GNU cross-toolchain for the A-profile cores: GCC 8.2-2019.01. This is the same toolchain that was previously built and distributed by Linaro. For the official announcement, see: https://community.arm.com/tools/b/blog/posts/pre-built-gnu8-cross-toolchain… For more information about the GNU Arm toolchain and to download the release packages, see the Arm Developer website at: https://developer.arm.com/open-source/gnu-toolchain/gnu-a For an explanation of FSF GCC 8 series changes see: https://gcc.gnu.org/gcc-8/changes.html For help in porting to GCC 8 see the following explanation: https://gcc.gnu.org/gcc-8/porting_to.html Download the release packages from: (sources) https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads (binaries) https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads Previous snapshots and release-candidates for GCC 7 and earlier are at: (sources) https://releases.linaro.org/components/toolchain/gcc-linaro/ (binaries) http://snapshots.linaro.org/components/toolchain/binaries/ Previous releases for GCC 7 and earlier are at: http://releases.linaro.org/components/toolchain/binaries/ A description of the Arm and AArch64 target triples can be found at: https://collaborate.linaro.org/display/TCWGPUB/ARM+and+AArch64+Target+Tripl… Host Requirements ================== * Ubuntu 14.04 LTS x86_64 or later or RHEL 6.9 x86_64: * x86_64 hosted cross compiler for AArch64 ELF bare-metal target (x86_64-aarch64-elf). * x86_64 hosted cross compiler for AArch64 ELF bare-metal, big-endian target (x86_64-aarch64_be-elf). * x86_64 hosted cross compiler for AArch64 GNU/Linux target (x86_64-aarch64-linux-gnu). * x86_64 hosted cross compiler for AArch64 GNU/Linux big-endian target (x86_64-aarch64_be-linux-gnu). * x86_64 hosted cross compiler for AArch32 bare-metal target (x86_64-arm-eabi). * x86_64 hosted cross compiler for AArch32 target with soft float (x86_64-arm-linux-gnueabi). * x86_64 hosted cross compiler for AArch32 target with hard float (x86_64-arm-linux-gnueabihf). * Windows 7 or later, for 32 and 64 bit OS: * i686-mingw32 hosted cross compiler for AArch32 bare-metal target (i686-mingw32-arm-eabi). * i686-mingw32 hosted cross compiler for AArch64 ELF bare-metal target (i686-mingw32-aarch64-elf). Package Versions ================= GCC 8.2.1 https://gcc.gnu.org/gcc-8/changes.html FSF glibc 2.28 http://lists.gnu.org/archive/html/info-gnu/2018-08/msg00000.html Newlib 3.0.0 https://sourceware.org/ml/newlib/2018/msg00019.html GNU Binutils 2.30 https://lists.gnu.org/archive/html/info-gnu/2018-01/msg00010.html FSF GDB 8.1.1 https://www.gnu.org/software/gdb/download/ANNOUNCEMENT libexpat 2.2.5 https://github.com/libexpat/libexpat/blob/R_2_2_5/expat/Changes libgmp 4.3.2 libisl 0.15 libmpfr 3.1.6 libmpc 0.8.2 libiconv 1.15 Sources provided in release source tar ball. News for GCC 8 (as of GCC 8.2-2019.01) ======================================= * Fix for "gcc-arm-8.2 toolchains do not support sanitizers". https://bugs.linaro.org/show_bug.cgi?id=4041 * Fix for "gcc-arm-8.2-2018.08 release points to https://gcc.gnu.org/bugs/". https://bugs.linaro.org/show_bug.cgi?id=4045 * Fix for "gcc8.2/AArch64: aarch64-linux-gnu-gdb: TUI mode is not supported". https://bugs.linaro.org/show_bug.cgi?id=4130 * Fix for "arm gcc-8 release is missing gold linker". https://bugs.linaro.org/show_bug.cgi?id=4212 * Each binary release file now contains manifest file with configuration flags for each toolchain component. For more details about Spectre V1 defense in GCC visit: https://lwn.net/Articles/759423/ Contact Arm ============ For any questions, please use the Arm Communities forums at: https://community.arm.com/tools/ Please report any bugs via the Linaro Bugzilla at: https://bugs.linaro.org/

5 years, 10 months

[ANNOUNCE] Linaro GCC 7.4 2019.01 source snapshot

by Mark Murray

The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2019.01 snapshot of the Linaro GCC 7 source package. The GCC 7 series introduced an ABI change for ARM targets by fixing a bug (present since GCC 5, see link below) that affects conformance to the procedure call standard (AAPCS). The bug affects some C++ code where class objects are passed by value to functions and could result in incorrect or inconsistent code being generated. If the option -Wpsabi is enabled (on by default) the compiler will emit a diagnostic note for code that might be affected by this ABI change. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728 For an explanation of the changes please see the following website: https://gcc.gnu.org/gcc-7/changes.html This snapshot1 is based on FSF GCC 7.4+svn267072 and includes performance improvements and bug fixes backported from mainline GCC. The contents of this snapshot will be part of the 2019.01 stable2 periodic release. Interesting changes in this GCC source package snapshot include: Updates to GCC 7.4+svn267072 Linaro bug 4007: “Internal compiler error with -mcpu=thunderx2t99” is fixed Feedback and Support Subscribe to the important Linaro mailing lists and join our IRC channels to stay on top of Linaro development. o 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 * Bug reports should be filed in Bugzilla against GCC product: http://bugs.linaro.org/enter_bug.cgi?product=GCC * Interested in commercial support? inquire at Linaro support: mailto:support@linaro.org [1]. Source package snapshots are defined when the compiler is only put through unit-testing and full validation is not performed. [2]. Stable source package releases are defined as releases where the full Linaro Toolchain validation plan is executed. IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

5 years, 10 months

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