=== This Week ===
LLDB ARM/AArch64 hardware breakpoints [TCWG-717] [9/10]
-- Submitted AArch64 hardware breakpoint patch for review.
-- Updates after upstream comments.
-- Added Arm hardware breakpoint support code.
-- Testing and debugging of Arm code on android arm device.
Miscellaneous Activities [1/10]
-- Meetings, Emails etc.
=== Next Week ===
LLDB ARM/AArch64 hardware breakpoints [TCWG-717]
-- Write breakpoint command based test-cases.
-- Write RSP packets based test-cases.
-- Submit patch for review after edits and upgrades.
GDB Kernel Awareness
-- Background study and understand existing patches
== Progress ==
[TCWG-617] Upstreamed a patch to make copy relocations use synthetic
sections. This allows us to remove the output section relative dynamic
relocation which is important for range extension Thunks
Did some design work for range extension Thunks.
Did some refactoring to merge PLT and IFunc PLT at maintainers request
[BUD17]
Researched my forthcoming Connect presentation and wrote about 3/5 of the slides
== Plan ==
Finish Connect presentation early next week as I'll be on holiday the
week before Connect.
Start implementing range extension Thunks.
== Progress ==
* [ARM GlobalISel] Add support for fp arguments [TCWG-1029] [5/10]
- Committed support for single precision hard float and soft-fp ABIs
- Work in progress on supporting double precision
* Misc [5/10]
- Meetings, mailing lists, code reviews
- Reverted / fixed a few patches that broke the buildbots
- Tested and uploaded binaries for release candidate 2 on AArch64
== Plan ==
* More GlobalISel
Hi All,
I am working on log10/qsort benchmarks on ARM64 (ARMv8) processor,
I want to check if we have experience with these benchmarks.
Actually i am looking for a compiler version which gives best results with
these benchmarks and specific compiler optimization (in my case is see O3
gives best numbers) ?
I have tried GCC-4.9 and GCC-6.2 with log10 benchmark and my observations
are:
1) With gcc 4.9 - 140 us
2) With GCC 6.2 - 150 us
My compilation flags are "-O3 -ftree-vectorize -funroll-all-loops --param
max-inline-insns-auto=550 --param case-values-threshold=30
-falign-functions=32 -ftracer"
So it seems like gcc-6.2 is better, am i missing something, should i use
some better compiler flags?
Thanks
-Bharat
~ Progress ~
* AArch64 OpenOCD. [6/10]
Solder and desolder the JTAG joint on HiKey. Tried different JTAG
options, but still can't get OpenOCD working.
* Patches review. [3/10]
** ILP32 GDB. Help cavium to reduce fails from 500 to 70.
GDB patch is OK, but there are still some regressions on ilp32
vs. lp64 on aarch64. Steve is still investigating on them.
** SVE GDB. Remove MAX_REGISTER_SIZE. Look people tend to agree
the way removing MAX_REGISTER_SIZE. Looking forward to Alan's
patches :)
** Kernel awareness debugging. Reviewed the cover letter of IBM's
patches. Want to share the common kernel debugging part between
IBM and Linaro.
* Schengen visa. [1/10] Fill in more in application form. Document
preparation.
~ Plan ~
* Kernel awareness debugging. Continue reviewing IBM's patches, and
figure out how to share the code.
* Go to London for visa application on Friday.
--
Yao Qi
== Progress ==
o Linaro GCC/Validation (7/10)
* GCC 4.9 2017.01:
- prepared final release
* GCC 5.4 2017.01:
- sources and binaries ready to publish
* GCC 6.3 2017.02:
- Cherry-picked bug fix into release branch
- ready for RC2
* Lot of release notes iterations and discussions
* Backports reviews
* Tree reassociation: on-going
o Misc (3/10)
* Various meetings and discussions.
== Plan ==
o Releases...
o Tree reassociation
=== This Week ===
LLDB ARM/AArch64 hardware breakpoints [TCWG-717] [9/10]
-- Wrote multi-threaded implementation of hardware breakpoints.
-- Added thread specific handlers to create hardware breakpoints.
-- Basic multi-threaded test application works after some fixes and debugging.
-- Committed fix for LLDB AArch64 android gcc build failure
Miscellaneous Activities [1/10]
-- Meetings, Emails etc.
=== Next Week ===
LLDB ARM/AArch64 hardware breakpoints [TCWG-717]
-- Write LLDB testsuite test cases for hardware breakpoints
-- Code clean-up and first version patch submission
-- Start work on Arm register context changes for hardware breakpoints.
== This Week ==
* TCWG-1006 (2/10)
- Created prototype patch for propagating returns_nonnull along the
same lines as malloc.
* TCWG-1010 (2/10)
- Continuing to work on prototype for bitwise dce
* ICE with __builtin_abs with -fgimple (2/10)
- Posted patch upstream
* Sick leave (2/10)
* Misc (2/10)
- Setting up docker on tcwg-ex40-01
- Meetings
== Next Week ==
- TCWG-1010, TCWG-548
The Linaro Binary Toolchain
============================
The Linaro GCC 6.3-2017.02-rc1 Release-Candidate is now available.
The GCC 6 Release series has significant changes from the GCC 5
release series. For an explanation of the changes please see the
following website:
https://gcc.gnu.org/gcc-6/changes.html
For help in porting to GCC 6 please see the following explanation:
https://gcc.gnu.org/gcc-6/porting_to.html
Download release-candidate packages from:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.3-2017.02-rc1/http://snapshots.linaro.org/components/toolchain/binaries/6.3-2017.02-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/
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 6.3-2017.02-rc1
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.3-2017.02-rc1/
Linaro glibc 2.23 (linaro/2.23/master)
https://lists.gnu.org/archive/html/info-gnu/2016-02/msg00009.html
Linaro newlib 2.4-2016.03 (linaro_2.4-branch)
https://sourceware.org/ml/newlib/2016/msg00370.html
Linaro binutils 2.27 (linaro_binutils-2_27-branch)
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=bin…
Linaro GDB 7.12 (gdb-7.12-branch)
https://lists.gnu.org/archive/html/info-gnu/2016-10/msg00007.html
Linaro toolchain package git branches are hosted at:
http://git.linaro.org/?a=project_list&s=toolchain%2F&btnS=Search
NEWS for GCC 6 (as of Linaro GCC 6.3-2017.02-rc1)
==================================================
* The mingw toolchains are now archived using the rsync -L option in
order to avoid problems with Windows extractors and symbolic links.
https://review.linaro.org/#/c/16415/
This resolves the following user bugs:
https://bugs.linaro.org/show_bug.cgi?id=2684https://bugs.linaro.org/show_bug.cgi?id=2192https://bugs.linaro.org/show_bug.cgi?id=2762
* The soft-float targeted toolchains have now been configured to
generate code using -mfloat-abi=soft.
This makes arm-linux-gnueabi and armeb-linux-gnueabi toolchains use
the "soft" FP ABI instead of "softfp".
Historically, TCWG's toolchains provided both "soft" and "softfp"
multilibs, but when switching from crosstool-ng to cbuildv2/abe (which
support a single multilib) "softfp" multilib was choosen. Using
"-mfloat-abi=soft" is a better choice for a gnueabi toolchain, since
it doesn't require cores to have a floating-point unit.
This change should not break compatibility for toolchain users since
the ABI will stay the same. The compiler and glibc libraries will not
refernce FP instructions.
* Removed .la files from binary toolchain archive as these files break
autotools builds.
https://bugs.linaro.org/show_bug.cgi?id=2764
* The Linaro GCC 6.3-2017.01 snapshot added further enablement for
ARMv8-M.
* The Linaro GCC 6.2-2016.12 snapshot added various AArch64 bugfixes and
optimizations.
* Backported glibc patch to simplify static malloc interposition [BZ
#20432] to correct user identified issue.
commit 058b5a41d56b9a8860dede14d97dd443792d064b
Author: Florian Weimer <fweimer(a)redhat.com>
Date: Fri Aug 26 22:40:27 2016 +0200
malloc: Simplify static malloc interposition [BZ #20432]
* Host binaries for x86_64 linux hosts now have symbols and debug
information stripped in order to reduce the size of the toolchain
binary archives. This reduces the archive size from 1.5G to 600M for
aarch64-linux-gnu target with the gcc-6-branch.
* The GDB version was upgraded from GDB 7.11 in the Linaro GCC
6.1-2016.08 release to GDB 7.12 in the Linaro GCC 6.2-2016.11 release.
* The Linaro GCC 6.2-2016.10 snapshot added AArch32 support for ARMv8.2
and ARMv8m, as well as some AArch64 fixes for ARMv8.2, and bug fixes
merged from FSF GCC 6.2. This is available in the binary toolchain as
of Linaro GCC 6.2-2016.11.
* Basic tuning support for the Qualcomm qdf24xx was added to the Linaro
GCC 6.2-2016.10 snapshot and is available in the binary toolchain as
of Linaro GCC 6.2-2016.11.
* IFUNC was disabled for baremetal targets, as it was causing test-suite
failures, and is presently a Linux only feature.
* The gold linker was added to this binary release.
* Backported malloc_lock fix into Linaro newlib 2.4.
commit 022bd2995640626d9efb6a839884c5e1c7c5e133
Author: Christophe Lyon <christophe.lyon(a)linaro.org>
Date: Wed Oct 19 14:11:50 2016 +0200
Re-enable malloc_lock for newlib-nano
* Backported rawmemchr patch into Linaro newlib 2.4.
commit 5357441171f2409fb759112bc6a00d3e672374d9
Author: Christophe Lyon <christophe.lyon(a)linaro.org>
Date: Wed Oct 19 14:09:51 2016 +0200
Add rawmemchr
* Backported strlen fix when using Thumb-2 and -Os -marm into Linaro
newlib 2.4.
commit f194ff4d5e1e304ac2a8d438d7abcbffd2dba757
Author: Christophe Lyon <christophe.lyon(a)linaro.org>
Date: Wed Oct 19 14:05:23 2016 +0200
Fix strlen using Thumb-2 with -Os -marm
* Backported fix for semihosting ARM when heapinfo not provided by
debugger into Linaro newlib 2.4.
commit bda499cb9d2b97075f74df9bfb38b23ff4d12ac2
Author: Christophe Lyon <christophe.lyon(a)linaro.org>
Date: Wed Oct 19 13:59:52 2016 +0200
Fixed semihosting for ARM when heapinfo not provided by debugger.
* Merged latest FSF glibc release/2.23/master into Linaro glibc 2.23.
* Backported __ASSUME_REQUEUE_PI check Linaro glibc 2.23 branch.
commit 2d20c3bf918cd94ebd4106693adb3a5c9272baba
Author: Adhemerval Zanella <adhemerval.zanella(a)linaro.org>
Date: Tue May 17 10:16:39 2016 -0300
Add runtime check for __ASSUME_REQUEUE_PI (BZ# 18463)
* Backported removal of __ASSUME_SET_ROBUST_LIST from Linaro glibc 2.23
branch.
commit bb8f09d72756186a3d82a1f7b2adcf8bc1fbaed1
Author: Adhemerval Zanella <adhemerval.zanella(a)linaro.org>
Date: Mon May 16 19:01:10 2016 -0300
Remove __ASSUME_SET_ROBUST_LIST
* Backported removal of __ASSUME_FUTEX_LOCK_PI from Linaro glibc 2.23
branch.
commit e48b4e7fed0de06dd7832ead48bea8ebc813a204
Author: Adhemerval Zanella <adhemerval.zanella(a)linaro.org>
Date: Mon May 16 10:35:25 2016 -0300
Remove __ASSUME_FUTEX_LOCK_PI
* Merged latest FSF binutils-2_27-branch into
linaro_binutils-2_27-branch.
* The libwinpthread DLL is now copied into the host bin directory to
satisfy mingw package dependencies.
* Backported GNU Linker fix.
commit fbc6c6763e70cb2376e2de990c7fc54c0ee44a59
Author: Nick Clifton <nickc(a)redhat.com>
Date: Tue Aug 23 09:45:11 2016 +0100
Fix seg-fault in ARM linker when trying to parse a binary file.
* Backported GNU Assembler fix for PR 20364
commit 5fe7ebe5ab43750abf8f490b785d99a1e598e7fd
Author: Nick Clifton <nickc(a)redhat.com>
Date: Fri Aug 5 10:37:57 2016 +0100
Fix the generation of alignment frags in code sections for AArch64.
https://sourceware.org/bugzilla/show_bug.cgi?id=20364
* Performance related backports from the following snapshots have been
included: Linaro GCC 6.1-2016.06, Linaro GCC 6.1-2016.07, Linaro GCC
6.1-2016.08, Linaro GCC 6.2-2016.09, Linaro GCC 6.2-2016.10, Linaro
GCC 6.2-2016.11, Linaro GCC 6.2-2016.12, and Linaro GCC 6.3-2017.01.
See the following Linaro GCC snapshots:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.1-2016.06/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.1-2016.07/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.1-2016.08/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.2-2016.09/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.2-2016.10/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.2-2016.11/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.2-2016.12/http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.3-2017.01/
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
--
Ryan S. Arnold | Director - Linaro Core Technology and Tools
ryan.arnold(a)linaro.org | ryanarn on #linaro-tcwg @ freenode.irc.net
T: +1-612-424-1861
