linaro-toolchain

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[ACTIVITY] 2 - 6 December 2019

by Diana Picus

== Progress == * LLVM 9.0.1 - Trying to bisect the arm failures * Triaging check-lldb failures on AArch64 [LLVM-512] - Finished with the unexpected failures - There are still some unexpected passes, but Omair has agreed to look into them * Morello - Managed to build android and lldb-server, currently trying to see if I can get them to work together

4 years, 11 months

coresight drivers access from syscall interface

by zied guermazi

hi,I started implementing GDB process record and replay with ARM CoreSight as described in the rfc published early this year. Current implementation of coresight tracing in Perf is based on the sysfs interface, by accessing /sys/bus/event_source/devices/cs_etm ... file. GDB implementation of bts and ipt is based on the syscall "sys_perf_event_open".it would be nice to use the similar mechanism for realizing similar functionalities. therefore I would like to know if linux kernel (with coresight deivers) is exposing coresight drivers through the syscall sys_perf_event_open and if this is the case how shall I configure the perf_event_attr to use it. thanks Zied Guermazi

4 years, 11 months

[ANNOUNCE] Linaro Binary Toolchain Release GCC 7.5-2019.12

by Maxim Kuvyrkov

The Linaro Binary Toolchain ============================ The Linaro GCC 7.5-2019.12 Release 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 packages from: (sources) http://releases.linaro.org/components/toolchain/gcc-linaro/7.5-2019.12/ (binaries) http://releases.linaro.org/components/toolchain/binaries/7.5-2019.12/ 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 7.5-2019.12 http://releases.linaro.org/components/toolchain/gcc-linaro/7.5-2019.12/ 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 8.3 (gdb-8.3-branch) https://lists.gnu.org/archive/html/info-gnu/2019-05/msg00007.html Linaro toolchain package git branches are hosted at: http://git.linaro.org/toolchain NEWS for GCC 7 (as of Linaro GCC 7.5-2019.12) ============================================== * 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, Linaro GCC 7.4-2019.01 and Linaro GCC 7.5-2019.11. 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/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.5-2019.11/ 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 -- Maxim Kuvyrkov https://www.linaro.org

4 years, 11 months

[ANNOUNCE] Linaro Binary Toolchain Release-Candidate GCC 7.5-2019.12-rc1

by Maxim Kuvyrkov

The Linaro Binary Toolchain ============================ The Linaro GCC 7.5-2019.12-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/7.5-2019.12-rc1/ (binaries) http://snapshots.linaro.org/components/toolchain/binaries/7.5-2019.12-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 7.5-2019.12-rc1 http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.5-2019.12-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 8.3 (gdb-8.3-branch) https://lists.gnu.org/archive/html/info-gnu/2019-05/msg00007.html Linaro toolchain package git branches are hosted at: http://git.linaro.org/toolchain NEWS for GCC 7 (as of Linaro GCC 7.5-2019.12-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, Linaro GCC 7.4-2019.01 and Linaro GCC 7.5-2019.11. 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/ http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.5-2019.11/ 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 -- Maxim Kuvyrkov https://www.linaro.org

4 years, 11 months

[Activity] Nov 25th ~ Nov 29nd 2019

by Luis Machado

# Progress # o Upstream GDB * ARM sim build failure with -fno-common - Sent a patch to gdb-patches. Going through rounds of reviews. * Patch reviewing and answering community questions. o GDB * GNU-644 - [GDB, AArch64] gdb.base/step-over-syscalls.exp failures - Spent some more time with this in the hopes of understanding the various failure modes. Still not clear if the kernel is doing the right thing. It may be hard to adjust things on GDB's side, but i have a couple patches solving some of the problems. o Misc * Updated personal information in the HR system. # Plan # o Upstream GDB * Get approval for the fix to -fno-common build issues with ARM sim. o GDB * GNU-644 - [GDB, AArch64] gdb.base/step-over-syscalls.exp failures - Engage with kernel folks for better understanding of signal delivery scheme. Polish current fixes and submit for review.

4 years, 11 months

[ACTIVITY] Week 48

by Yvan Roux

o LLVM: * Machine Outliner: - Disabled asm statements. - Added Helium LD/ST instructions support - Adding testcases o Misc * Various meetings and discussions.

4 years, 11 months

[ACTIVITY] 2 weeks ending 1 Dec 2019

by Richard Henderson

7 working days, then Thanksgiving. [VIRT-262 # ARMv8.1-PAN Privileged Access Never] Finished, still need to post. [VIRT-273 # ARMv8.2-ATS1E1, AT S1E1R and AT S1E1W instruction variants ] Finished, still need to post. [VIRT-276 # ARMv8.2-UAO, PSTATE override of Unprivileged Load/Store ] Finished, still need to post. [VIRT-263 # ARMv8.1-VHE Virtual Host Extensions ] FIXED! Welsh sprint with AJB; found and fixed two bugs. Final bug causing guest kernel crash while booting fixed upstream by Marc Zyngier vs ptrauth. Will do some more thorough testing during rc4 and post once the development phase opens up again. [VIRT-327 # Richard's upstream QEMU work ] Review of target/hexagon skeleton. Review of arm dcpop patch set for beata. Fixed a couple of arm translator bug for clyon. Some investigation into a reported hppa-linux-user bug. While I can reproduce locally, so far I have not tracked down anything that I can prove is a translation bug. r~

4 years, 12 months

[ACTIVITY] week ending Dec. 1 2019

by Alex Bennée

QEMU Tooling ([VIRT-252]) ========================= Extend gdbstub for SVE ([VIRT-281]) - worked on [v2 rebase addressing comments] - posted {PATCH v2 00/14} gdbstub refactor and SVE support Message-Id: <20191130084602.10818-1-alex.bennee(a)linaro.org> [VIRT-281] https://projects.linaro.org/browse/VIRT-281 [working prototype] https://github.com/stsquad/qemu/tree/gdbstub/sve-registers [v2 rebase addressing comments] https://github.com/stsquad/qemu/tree/gdbstub/sve-registers-v2 QEMU ARMv8.1 VHE ([VIRT_263]) ============================= - inaugural Welsh code sprint with rth - found some new bugs, squashed some old bugs - together with recent upstream fixes SUCCESS! - can now boot a guest from a VHE enabled kernel :-) [VIRT_263] https://projects.linaro.org/browse/VIRT-263 Upstream Work ([VIRT-109]) ========================== - posted {PULL for 4.2 0/3} a few vm-test fixes Message-Id: <20191126120339.18059-1-alex.bennee(a)linaro.org> - there are still niggling netbsd failures - posted {PATCH for 4.2?} .travis.yml: drop xcode9.4 from build matrix Message-Id: <20191127132430.3681-1-alex.bennee(a)linaro.org> - investigation into [ARM HPC compiler triggered linux-user bug] - may be 64k page related as couldn't reproduce on Ubuntu - posted {PATCH v1 0/5} linux-user mmap debug cleanup Message-Id: <20191128194603.24818-1-alex.bennee(a)linaro.org> [ARM HPC compiler triggered linux-user bug] https://bugs.launchpad.net/qemu/+bug/1853826 Other Activities ================ - published [QEMU Summit and KVM Forum trip report] [QEMU Summit and KVM Forum trip report] https://collaborate.linaro.org/display/CR/20191030+QEMU+Summit+and+KVM+Foru… Absences ======== - 2nd Dec Holiday Current Review Queue ==================== * {PATCH 0/4} python/qemu: New accel module and improvements Message-Id: <20191115180829.10275-1-wainersm(a)redhat.com> Added: <2019-11-28 Thu> * {PATCH v2 0/2} Run tcg tests with tci on Travis Message-Id: <20191128153525.2646-1-thuth(a)redhat.com> Added: <2019-11-28 Thu> * {PATCH 0/2} flush CPU TB cache in breakpoint_invalidate Message-Id: <20191127220602.10827-1-jcmvbkbc(a)gmail.com> Added: <2019-11-28 Thu> * {RFC PATCH 00/10} hw/avr: Introduce the Arduino board Message-Id: <20191128015030.27543-1-f4bug(a)amsat.org> Added: <2019-11-28 Thu> -- Alex Bennée

4 years, 12 months

[weekly][dsg-models][linaro] report week ending 29 Nov

by Peter Maydell

Progress: * VIRT-65 [QEMU upstream maintainership] - code review: + finally got back to the reset-refactoring patchset and gave review on v5 of that. This is very nearly ready. + reviewed and got into 4.2 rc3 some patches from Marc Z fixing some missing emulation/bugs that newer Linux guest kernels trip over + rc3 out of the door; we will need an rc4, though - more time consumed by office-move thanks -- PMM

4 years, 12 months

[ACTIVITY] Week ending 29th November 2019

by Peter Smith

[Morello] Rebase of LLD against September CUCL update complete - Painful due to LLD changing address layout (every test expected value shifted), and a naming convention change. - No functional changes needed to patch. - Submitted static linking patches for review. Will send the dynamic ones after all static linking has been merged. Wrote up notes of Linaro Tech-leads Morello Q&A. Misc: Upstream LLD reviews

4 years, 12 months

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