The Linaro Toolchain Working Group (TCWG) is pleased to announce the
2018.11 snapshot of Linaro GCC 6 source package.
o This Linaro GCC 6 snapshot[1] is based on FSF GCC 6.5+svn265890 and
includes performance improvements and bug fixes backported from
mainline GCC. This snapshot will be part of the final maintenance release,
as the upstream GCC 6 branch is at the end of its maintenance lifespan.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.5-2018.11/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 6.4+svn265890
o Subscribe to the important Linaro mailing lists and join our IRC channels to
stay on top of Linaro development.
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[1]. Source package snapshots are defined when the compiler is only
put through unit-testing and full validation is not performed.
Mark Murray Staff Software Engineer | Arm
. . . . . . . . . . . . . . . . . . . . . . . . . . .
p: +44 1223 405082
arm.com <http://www.arm.com>
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o 4 days week.
o LLVM
* 7.0.1-rc2:
- Uploaded ARM and AArch64 binaries
- Investigating miscompare on AArch64
* Machine Outliner on ARM prototype:
- IR Outliner experiment gave interesting code size reduction
o Misc
* Various meetings and discussions.
* CI patch reviews
Three day week.
[GNU-180 # Fix gcov crash on program exit]
Fiddled around with TI-RTOS for a while before I realized that was sort of
beside the point. Gave the reporter a method do avoid dumping during the
global destructors. Still need to look into where the reported stack space
problem might be.
[Upstream]
Out-of-line softmmu patches got some work. Added ppc64 support. Fixed a race
and a code removal crash. Emilio verified -5% aa64 boot+shutdown time, but it
performed less well on spec2006.
Reviewed risc-v host patch set.
r~
QEMU Tooling ([VIRT-252])
=========================
QEMU plugin support ([VIRT-280])
- started reviewing Emilio's {RFC 00/48} Plugin support Message-Id:
<20181025172057.20414-1-cota(a)braap.org>
- port my example tools to his framework :todo
[VIRT-280] https://projects.linaro.org/browse/VIRT-280
Upstream Work ([VIRT-109])
==========================
- started looking at {RFC PATCH v2 00/23} KVM: arm64: Initial support
for SVE guests Message-Id:
<1538141967-15375-1-git-send-email-Dave.Martin(a)arm.com>
[VIRT-109] https://projects.linaro.org/browse/VIRT-109
Other Tasks
===========
- [Video for KVM Forum QEMU status report] is up
- the rest of the [sessions are here]
- posted {PULL for 3.1 0/2} Testing tweaks Message-Id:
<20181114131008.27599-1-alex.bennee(a)linaro.org>
[Video for KVM Forum QEMU status report]
https://www.youtube.com/watch?v=GZBd3jt5iA8
[sessions are here]
https://www.youtube.com/channel/UCRCSQmAOh7yzgheq-emy1xA/videos
Completed Reviews [3/3]
=======================
{PATCH} tests/tcg/multiarch: fix 32bit linux-test on 64bit host
Message-Id: <20181113175437.26492-1-laurent(a)vivier.eu>
{Qemu-devel} {PATCH} hax: Support for Linux hosts
Message-Id: <20181114130428.32326-1-asanchez(a)kryptoslogic.com>
{Qemu-devel} {PATCH} target: hax: replace g_malloc with g_malloc0
Message-Id: <1542261954-4060-1-git-send-email-liq3ea(a)gmail.com>
Absences
========
- Christmas Holidays
- Connect BKK19 (1-5th April 2019)
Current Review Queue
====================
* {RFC PATCH v2 00/23} KVM: arm64: Initial support for SVE guests
Message-Id: <1538141967-15375-1-git-send-email-Dave.Martin(a)arm.com>
* {Qemu-arm} {PATCH v5 0/4} target/arm: KVM vs ARMISARegisters
Message-Id: <20181113180154.17903-1-richard.henderson(a)linaro.org>
* {Qemu-devel} {PATCH for-4.0 00/17} tcg: Move softmmu out-of-line
Message-Id: <20181112214503.22941-1-richard.henderson(a)linaro.org>
* {Qemu-arm} {PATCH 00/13} Support disabling TCG on ARM
Message-Id: <20181113165247.4806-1-sameo(a)linux.intel.com>
* {Qemu-devel} {PATCH for-4.0 00/17} tcg: Move softmmu out-of-line
Message-Id: <20181112214503.22941-1-richard.henderson(a)linaro.org>
* {Qemu-arm} {PATCH v5 00/16} gdbstub: support for the multiprocess extension
Message-Id: <20181110081147.4027-1-luc.michel(a)greensocs.com>
--
Alex Bennée
LLD bug fixing and triage
pr39678 Calculation of DT_PLTRELSZ with strange linker script.
pr39662 Request to add more emulations
pr39634 LTO and references from inline symbols
D54474 Fix for incorrect relocation span out of ifunc review
D54624 Redefinition of _GLOBAL_OFFSET_TABLE_
=== Work done during the past 2 weeks ===
* Resurrect code size optimization for fmul/dmul from Tony Wang: bootstraping
+ rework slightly to better deal with switch of section and deal with
several possible section layout
+ start anew with a new approach based on symbol visibility
-> works without -gc-sections and does not rely on section layout
* Fix -mslow-flash-data: ready to upstream on Monday
+ some more cleanup and code improvement
* LLVM-432 (Support arithmetic on FileCheck regex variable):
+ started reworking parsing code to be separate from evaluation and support
more complex expression
* Infrastructure code review
=== Plan for week 47 ===
* LLVM-432 (Support arithmetic on FileCheck regex variable):
+ extend testcase coverage (add tests for latest syntax change and
add more negative testing)
+ finish cleaning up the code
* Try to reproduce perf issue mentioned in week #30's weekly report on
latest perf
* Line management.
Progress:
* VIRT-251 [AArch32 Hyp/running microvisors]
- fixes to the issues running L4Re/Fiasco have now been committed
to QEMU master for the 3.1 release
- some minor remaining missing functionality not needed for these guests
has been recorded as subtasks of VIRT-65
- this Epic is now closed!
* VIRT-65 [QEMU upstream maintainership]
- release work
- looked again at automation of uploads to the Coverity Scan service
(last try was last year); sent out revised patchset
- code review:
+ "sbsa reference board" model
+ LOR, HPD, AA32HPD extension support (rth)
+ Minimize TLB flushing for ASID changes (rth)
+ Support for loading uboot "noload" uimage files
+ better PMUv3 emulation
+ micro:bit SoC device models
thanks
-- PMM
== Progress ==
* FDPIC
- Cortex-M uClibc-ng patch still pending
- GCC: updated patches and sent v4
Tried to isolate the regressions observed on xtensa uclinux
toolchain with my patches.
Built a qemu-system-arm -based platform to run tests involving the
kernel. Built and ran a few LTP tests.
Unfortunately, LTP has dropped/is dropping support for uclinux
configs, for lack of interest
* GCC upstream validation:
- reported a few regressions
- dealing with some random results, again
* GCC:
- bug report on aarch64 about misaligned accesses. Waiting for more
details to reproduce the problem.
* misc (conf-calls, meetings, emails, ....)
- reviewing infra script patches
== Next ==
FDPIC:
- GCC: handle feedback on v4 patches
- uclibc-ng: look at how to test fdpic mode with openadk
== Progress ==
* Catch up on things
- Remind myself what a laptop looks like, install updates etc etc
- Figure out new links, machines etc
- Clean up inbox
* [LLVM-59] Small changes to the LLVM helper scripts
- Had a look at all the remaining issues and closed them as obsolete
or already implemented
* [LLVM-479] Check current status of GlobalISel
- Read the mailing list to see what I’ve missed
- Started looking at the code
- Trying to run the test-suite on a TK1
* Misc
- Fixed a simple buildbot breakage
- Meetings
== Plans ==
* LLVM-479
== This Week ==
* GNU-405: Implement division using vrecpe/vrecps (1/10)
- Committed patch
* SVE ACLE (2/10)
- Continue work on shift intrinsics
* PR83750 (1/10)
- Addressing upstream comments
* Holidays (6/10)
- Diwali festival
== Next Week ==
- Continue working on SVE ACLE and PR83750
