== Progress ==
* Worked on integrating Cbuildv2 with Jenkins, an automated build
system used by the LAVA team.
- Uses cbuildv2 to fetch, configure, build, and install a C
toolchain
cross or native build.
* Wrote a script to convert DejaGnu sum files into Junit format, which
can be imported into Jenkins for viewing. Initial test is online at:
https://ci.linaro.org/jenkins/view/toolchain/job/junit-parsing/.
A work
in progress, and Jenkins is a bit limited in the allowed test
results.
* Did expense reports for Connect - Cauldron trip.
== Plans ==
* Refactor how cbuildv2 dependencies for packages are handled so
they work more than one level deep.
* Have cbuildv2 build C++ after eglibc.
* More Jenkins integration.
* Work on wiki pages.
- rob -
== Progress ==
- Addressed VRP based zero/sign extension elimination review comments
- Make check passes but spec2k gcc fails in results comparison;
investigating it
- Started again with spec2k comparison for ARM to see potential
optimization opportunities
- Installed libacovea in Chromebook with some tweaks to study affects
of optimization options
== Plan ==
- post the VRP based zero/sign extension elimination patch
- continue with pec2k comparison for ARM
== Misc ==
- Was on holiday until 29th (4 day week)
== Issues ==
* None
== Progress ==
* Validate and release Linaro toolchain binaries 2013.07.
* Commit the fix for pr57637.
* Revise patch and test case for lp1189445.
* Separate conditional compare changes to small patches and test.
* Send out the patch of "Reassociate X == CST1 || X == CST2 if
popcount (CST2 - CST1) == 1 into ((X - CST1) & ~(CST2 - CST1)) == 0"
for internal review.
* R/M toolchain internal release work.
== Plan ==
* Send out the conditional compare patches for review.
== Planned leaves ==
* Aug 19-20.
== Progress ==
* Divmod 64
- Got generic lowering working, with an ugly hack
- Working on custom lowering with new node types
* Testing the SLP vectorizer on O3 and O2
- Found some regressions, need to investigate
- It's going to be on by default on O3 from now on
* SLP vectorizer introduced by default on O3
- Lots of failures in ARM test-suite due to illegal vector types
- Fixed on patch r187658
== Issues ==
Had a bit of a problem with my tooth, had to stay away for a while... put
me away from working on divmod properly... :(
== Plan ==
HOLIDAYS!!!
Progress:
* v7 mach-virt upstreaming:
** implemented architected timer support for TCG, sent patches
** nearly finished cleanup of mach-virt including adding virtio support
** ran into an odd bug where putting RAM not at address zero results in
the kernel not booting -- need to debug
** once that is fixed should just need to do final testing and send patches
Plans:
* look at OVS' v2 a8-kvm-support patches
-- PMM
== Progress ==
* Libssp support for AArch64 TCWG 23
Discussed with Matt and decided to assume "glibc" will export canary
guard variable in TCB, for aarch64.
It will export it as global variable for 32 bit. Working on top of
Christophe patch that make frame grows downward.
* Look at builtin return address behavior in the absence of frame pointer.
For X86_64 usage if __builtin_return_address(n) n>0 and
-fomit-frame-pointer results in undefined behavior.
In Ubuntu 12.04 the native GCC 4.7.1 resulted in segmentation fault
on x86_64 machine for such a test.
Currently planning to close this as undefined behavior in aarch64 as well.
Discussing with Marcus on this.
* TCWG-20 gprof support patches.
Re based with latest trunk and regression tested.
http://gcc.gnu.org/ml/gcc-patches/2013-07/msg01352.htmlhttp://gcc.gnu.org/ml/gcc-patches/2013-07/msg01333.html
Misc
* Tuesday spent on Internal (AMD) work.
== Plan ==
* Continue Libssp support for AArch64 TCWG-23
* Update review comments and upstream gprof patches
==issues==
* LTO/PGO work stopped now since libssp support priority is more.
== Progress ==
* Completed initial investigation on catch syscall support on arm TCWG-182.
* Looked into dwarf assembler to generated architecture independent
debug information for dwarf2 test cases.
* Resolved some gdb.mi configuration issues due to which some test
cases were failing.
* Review status of GDB testing on arm and filled up JIRA with proposed
future work.
== Plan ==
* Continue work on gdb catch syscall support for arm TCWG-182.
* Background task: Understanding dwarf assembler to generate dwarf2
debug information for architecture test cases.
* File UK visa for meetings in September after receiving invitations.
== Progress ==
* Produced spec2000 benchmark data on panda for fsf-4.7, fsf-4.8,
gcc-linaro-4.7, and gcc-linaro-4.8.
* Helped Charlie get stared with building the toolchain.
* Found "experimental" option that got crosstool-ng actually working.
* Got cbuildv2 now doing much of the process crosstool-ng does for
a complete stage1 build.
* Improved native and cross toolchain builds via cbuildv2.
== Plans ==
* Continue working on cbuildv2 till it's usable by others.
* Looks like I have a pile of new wiki pages to write.
== Progress ==
* Induction and set up work environment
* Started investigating how to build gcc cross compilers, so that it can be
documented clearly [TCWG-190 <http://cards.linaro.org/browse/TCWG-190>]
* I can build a working arm-none-linux-gnueabi crosscompiler, and
understand each of the steps involved
* Using the same method, aarch64-none-linux-gnu does not build
== Issues ==
* None
== Plan ==
* Write up knowledge gained so far
* Find out why aarch64 doesn't work
* Find out more about other build variations (multilib/multiarch etc) and
how that affects what I've done so far
== Progress ==
* Backported aarch64 string functions and ARM gcc 4.8 fix in eglibc.
* Released eglibc 2.17 2013.07-2.
* Forward ported binutils AArch64 IFUNC patches to HEAD so Marcus can test them.
* Closed stack guard JIRA card and made a new one for pointer guard.
* More malloc benchmarking, reading etc.
* Started work on malloc code.
* Booked flights for LCU13!
== Issues ==
* None.
== Plan ==
* Deal with any test feedback on IFUNC patches.
* malloc
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
* Looking at 64-bit divmod on two fronts:
- Clean, but intrusive on target-independent code
- Dirty and duplicated, but restricted to target-specific code
* Long discussion about the purpose of the IR on the LLVMLinux list
* Watching some GNU Caldron videos
== Plan ==
* Continue looking at divmod for 64-bit values
* Start investigating cross-compilation issues
* When Rob is ready, have a look at CBuild2 for LLVM+Benchmarks
Progress:
* started on getting v7 mach-virt into shape for upstreaming:
doesn't currently work on TCG due to missing architected timers emulation
* sent fixes for some minor bugs in virtio-mmio noticed by reviewers
* support for various people for "I tried to boot linux in QEMU/KVM
and nothing happens" issues. This is usually because of a misconfigured
kernel which is either not sending serial output to the right place
or stopped with an error before the point where serial is set up.
However it's pretty awkward for users to debug especially compared
with x86 which doesn't generally have these issues because all x86
hardware is sufficiently the same that console and/or earlyprintk
just about always works.
* started the conversation on kvmarm about what the CPU in a KVM VM
ought to look like (always same as host? always an A57? always some
"generic VM CPU"? do we care (does the OS care?) that it has a GICv2
when the same CPU in h/w has a v3)
* came up with a clever hack for making QEMU QOM object struct fields
be only accessible to the object's implementation and not its users,
using gcc's "deprecated" attribute and some CPP macros.
-- PMM
### 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 2013.07-2
The Linaro Toolchain Working Group is pleased to announce the 2013.07-2
release of Linaro eglibc 2.17, the second 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 ARM memcpy implementation for hardware with NEON or VFP support.
* Optimized string functions for AArch64: memcmp, memset, memcpy, memmove,
bzero, strcmp, strlen, strnlen, strncmp.
#### Bug Fixes
* None
### Source
#### Release Tarball
* https://releases.linaro.org/13.07/components/toolchain/eglibc-linaro
#### Development Tree
* git://git.linaro.org/toolchain/eglibc.git
This release was built from the `linaro_eglibc-2_17-2013_07-2_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
Hi,
I am new to the linaro toolchain and have two questions don't find an
explicit answer. Help you experts can help.
1. Can I use linaro arm toolchain to build application for armv5t core?
My box is a arm926ejs.
2. Does anyone has experience in making linaro current version work with
buildroot? I tried, but got a lot of strange error. (maybe it is the
same problem as question 1, since I set my cpu as arm925t in buildroot).
Thanks in advance.
--
I can't go back to yesterday - because I was a different person then
The Linaro Toolchain Working Group announce the 2013.07-1 Linaro GCC
4.8 release. This is a respin of the 2013.07 release because of an
issue with internal memcpy and -mno-unaligned-access.
The source tarball is available from:
https://launchpad.net/gcc-linaro/+milestone/4.8-2013.07-1
Please find the original 2013.07 announcement below.
The Linaro Toolchain Working Group is pleased to announce the release
of both Linaro GCC 4.8 and Linaro GCC 4.7.
Linaro GCC 4.8 2013.07 is the fourth release in the 4.8 series. Based
off the latest GCC 4.8.0+svn200355 release, it includes performance
improvements and bug fixes.
Interesting changes include:
* Updates to GCC 4.8.1+svn200355
* Address Sanitizer support for ARM.
* New -mrestrict-it option support.
* Backport of support for further AArch64 instructions.
* Backport of support for further ARMv8 AArch32 instructions.
* Reverted recent changes to shrink-wrapping and tail-calls.
Linaro GCC 4.7-2013.07 is the sixteenth release in the 4.7
series. Based off the latest GCC 4.7.3+svn200408 release, this is the
third release after entering maintenance.
Interesting changes include:
* Updates to GCC 4.7.3+svn200408
The source tarballs are available from:
https://launchpad.net/gcc-linaro/+milestone/4.7-2013.07https://launchpad.net/gcc-linaro/+milestone/4.8-2013.07
Downloads are available from the Linaro GCC page on Launchpad:
https://launchpad.net/gcc-linaro
Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain
Bugs: https://bugs.launchpad.net/gcc-linaro/
Questions? http://ask.linaro.org/
Interested in commercial support? inquire at support(a)linaro.org
== Progress ==
Was on vacation most of the week Mon - Wed leave (Thursday half day).
* Libssp support for AArch64 TCWG 23
Restarted the work. Looked at how X86 GCC generated code. Looking at
per thread support for libssp and compiler support.
== Plan ==
* Continue Libssp support for AArch64 TCWG-23
* Look at builtin return address behaviour in the absence of frame pointer.
==issues==
* LTO/PGO work stopped now since libssp support priority is more.
== Issues ==
* None.
== Progress ==
* Attended linaro Connect (Wk 28)
* OE Launchpad bug #1200620 :
[ICE while building Exynos5 kernel with current 4.8 branch]
- Issue due to a bad usage of unaligned load/store in HI mode
- Fix approved and committed upstream
- Release respin ongoing.
* Launchpad bug #1186218 :
[kernel doesn't boot on Arndale/Nexus with Linaro GCC 4.8]
- Discussed the issue at Connect
- Waiting for a reduce testcase from the kernel team.
* LRA on AArch64:
- Some regressions in the testsuite
- Debugging ongoing.
* LRA on AArch32:
- Still some issues with libgcc build in Thumb
- Back on this issue.
* 2013-08 4.8 release:
- Backports from trunk ongoing.
== Plan ==
* 4.8 Backports
* Summer break
== Progress ==
* Debugged gdb.mi and linux-nat code to investigate issues on arm.
* Cleared pending gdb patches.
* Listened to Connect sessions and key notes on youtube
* Follow up on travel hick ups and UK/US visa application
== Plan ==
* Review GDB current status and fill up JIRA with proposed future work
* Windup work on gdb test suite updates and submit remaining patches.
* Follow up on gdb patches
* Clear/Update JIRA cards
* File UK visa for meetings in September.
== Progress ==
* Attended Connect, did presentation and other stuff.
* Left Connect early to attend the Gnu Tool Cauldron. Ran BOF on
testing the toolchain, attended many talks including the one on
Graphite.
* Worked on modularizing cbuildv2 package parsing into functions so
bzr,svn,git URLs and tarball snapshots from toolchain64 work the
same.
* Added LLVM support to cbuildv2, Clang and the testsuites only work
if built separately for now.
* Reproduced build problem Viswanath was having with crosstool,
Zhenqiang knew the missing package(s) that kept C++ builds from
working.
* Built fsf 4.7 and 4.8 as well as Linaro GCC releases for July on Panda
board.
* Got spec200 benchmarks working on panda, ran them for the above
branches and releases.
== Plans ==
* Help Charlie come up to speed on building GCC.
* Run more benchmarks on the above branches and do graphs on
performance.
* See why for me on a panda, all the tests fail with make check.
* Find time to work on cbuild2 so Charlie can beta test it sometime
soon.
- rob -
== Issues ==
* None
== Progress ==
* Enable multi-arch for Linaro aarch64-linux-gnu build.
- Configure gcc with --enable-multiarch.
- Backport eglibc patches for rtlddir.
- Configure eglibc to set libdir, slibdir and rtlddir.
* Follow up the patch for pr57637.
* Reassociate X == CST1 || X == CST2 if popcount (CST2 - CST1) == 1
into ((X - CST1) & ~(CST2 - CST1)) == 0.
- Test is ongoing.
* Rebase conditional compare changes to trunk.
== Leave ==
* July 17.
== Plan ==
* Send out the conditional compare changes for Linaro internal review.
== Progress ==
Short week (3 days)
* Divmod
- Finished most of the work, patch upstream (r186390)
- Trying to lower remainder as divmod without sacrificing the div+mod
merge during legalization
* Buildbots
- One panda fails even at 920MHz, replaced with a new one
- Using decent power supplies now, should work a whole week
- Lab config is messed up, need to start from scratch
- Failed at 920MHz with decent power supply
- Giving up on Pandas as buildbots...
* Background
- Not many code reviews last two weeks, as Connect and the Pandas took
most of my spare time
- Test-suite's Lencod bug fixed upstream, no more need of dirty hacks on
stack offset calculation
== Plan ==
* Continue on divmod lowering, finding a way to merge Custom with Expand
lowering, so not to break the div+rem merge during legalization, but still
lower divmod as Custom. 64-bit types still use them.
* Study cross-compilation issues in Clang and LLVM, prepare a document on
how it works (or not), and what paths we can take to make it better in the
short/medium term.
* Follow up on Phoronix results and CBuild2 benchmarks, time allowing
== Progress ==
* Investigating glibc stack guard support
* Developed initial patches
* Raised ABI issue
* More malloc work
* Integrated tcmalloc into benchmark framework
* Improved benchmark repeatability
* Added Python benchmark script and graphing script
* Respin and commit gdb TLS testsuite patch (my gdb patch queue now empty)
* Committed two of Omair's gdb patches
== Issues ==
* None.
== Plan ==
* Produce some malloc benchmark graphs
* Progress the stack guard work
* Start writing some malloc code
--
Will Newton
Toolchain Working Group, Linaro
Progress:
* attended Linaro Connect (wk 28)
* sent pull requests for target-arm/arm-devs queues
* resent virtio-mmio patchset; this is now ready for commit
and I will send a pullreq with it in next week
* finished off a cleanup of linux-user to remove the support
for configuring targets without threading support
* resorted todo list against cards
* started on getting v7 mach-virt into shape for upstreaming
-- PMM
