Hi all,
We are using Linaro 13.03 toolchain(
gcc-linaro-arm-linux-gnueabihf-4.7-2013.03-20130313_linux We are trying to
execute a simple test code to check whether ARM assembly code executes on
board or not. Execution is on Arndale Board. Every time We include assembly
function, We get segmentation fault. Kindly check if I We are missing any
arm related flags in makefile.
We have attached the ‘helloworld’ test code and makefile.
Regards,
Vishwa
Is that supposed to be possible? When I add --disable-multilib to the
configure options, the build fails on the install, because it hasn't built
any of src/gcc-linaro-4.8-2014.02/libgcc:
/bin/sh ../../../../src/gcc-linaro-4.8-2014.02/libgcc/../mkinstalldirs
/home/ubuntu/work483/build/sysroot/home/ubuntu/opt/cross-gcc-linaro/lib/gcc/arm-linux-gnueabi/4.8.3
/usr/bin/install -c -m 644 libgcc_eh.a
/home/ubuntu/work483/build/sysroot/home/ubuntu/opt/cross-gcc-linaro/lib/gcc/arm-linux-gnueabi/4.8.3/
/usr/bin/install: cannot stat `libgcc_eh.a': No such file or directory
make[3]: *** [install-shared] Error 1
make[3]: Leaving directory
`/home/ubuntu/work483/build/gcc/arm-linux-gnueabi/libgcc'
make[2]: *** [install-target-libgcc] Error 2
make[2]: Leaving directory `/home/ubuntu/work483/build/gcc'
make[1]: *** [install] Error 2
make[1]: Leaving directory `/home/ubuntu/work483/build/gcc'
make: *** [stamp/gcc-install] Error 2
I don't want or need multilib, so I'd rather build the toolchain without
it, but before I try to make that happen, I wanted to make sure it's
supposed to be able to get built correctly that way.
Thanks,
Diane
== Progress ==
* IAS (TCWG-377)
- Long discussions about magic in inline asm
- Bottomline is: we're still validating anyway
* AArch64 (TCWG-387)
- Making it build with CMake, discarding some tests
- Similar changes to the test-suite
- All green except sphereflake
* Buildbots
- Investigating one failure on test-suite due
to register allocator changes
- Will continue this during or after Connect
* Background
- Connect preparations
- EuroLLVM 14 sync call, paper discussions
- Researching some kernel C/ASM syntax
- Studying __builtin_constant_p usage
- Patch reviews, etc.
* Time
- CARD-862 8/10
- Others 2/10
== Plan ==
* Connect
(slightly delayed)
== Progress ==
* 3 day week (annual leave Thursday and Friday)
* QEMU ARMv8 CRC instructions (4/10, TCWG-52)
* Slides for Connect (1/10)
* Further work on longjmp/setjmp Systemtap probes on ARM (1/10, TCWG-378)
== Issues ==
* None
== Plan ==
* Complete QEMU CRC instruction work
* Preparation for Connect
--
Will Newton
Toolchain Working Group, Linaro
== This week ==
- US Holiday on Monday, January 17th
- Backported 202407 - Fix parameter to vrsqte_f64
- Backported 202259 (on read/write branch) - AARCH64, fix return types
for vaddvq_s64, vaaddvq_u64
- Backported 202321 - Fix vdup<bhsd>_lane<q>_* instrinsics' lane parameter
- Backported 202322 - Fox register constraints for lane intrinsics
- Installed Qemu64 simulator and attempted to test aarch64 backports.
- Shared library issue is preventing qemu64 from executing; Rob Savoy
is investigating
== Next week ==
- Test pending git review backports with Qemu64 if issues resolved
- Test backports completed this week on Qemu64
- New backports
== Future ==
--
Michael Collison
Linaro Toolchain Working Group
michael.collison(a)linaro.org
== Issues ==
* none
== Progress ==
* LRA on AArch32:
o TCWG-343 : Make LRA the default for the ARM backend (0/10)
- No progress this week on my side.
o TCWG-345 : Analyse performance of LRA for ARM. (4/10)
- Analysed Spec2K figures on Cortex-a15.
* Backports review: (1/10)
o Start to look at the Gerrit review process.
o Lack of testsuite results
* Misc:
o LCA'14 : AArch64 toolchain status session. (3/10)
o Various meetings. (2/10)
== Next ==
* Backports review
* https://bugs.launchpad.net/bugs/1169164
* Connect
== Progress ==
* Completed testing and submitted patches upstream. [TCWG-251] [TCWG-252] [1/10]
* Travel to capital Islamabad for Macau visa follow up. [3/10]
* Shifting to new office space and setting up office [6/10]
== Plan ==
* Study aarch64 code and create task breakdown for record/replay
support. [TCWG-389]
* Setup gdb for aarch64 and try to run a demo application. [TCWG-389]
* Write how-to for using scripts to compare two gdb testsuite runs. [TCWG-96]
* Setup network and internet etc in new office space.
== Issues ==
* None
== Progress ==
* CCMP for AARCH64.
- Design cases to cover most conditional compare combinations.
- Set up qemu environment and run regression tests. And fix all the new FAILs.
* Respawn 2014.01-01 baremental toolchains by setting
CT_TARGET_LDFLAGS=" --specs=rdimon.specs "
* Rebuild arm-linux-gnueabi toolchain and ran spec2k. But can not
reproduce the regression about Linaro 4.8 based on 2014.01 release.
== Plans ==
* Send out the CCMP patches for community review.
== Progress ==
- TCWG-394 (5/10)
- Found one more issue, regression tested and posted the patch
upstream for review
- http://gcc.gnu.org/ml/gcc-patches/2014-02/msg01282.html.
- TCWG-395 (1/10)
- Started with a google doc for wiki update
- Speck regression analysis with 4.7, 4.8 Nov and Dec releases (2/10)
- Native build of these versions and rank spec2k benchmarking for all
of them
- Not able to reproduce it on a15 as reported
== Misc ==
1 Day off sick
== Plan ==
- Get all the information required for wiki - TCWG-395
- Start working on TCWG-396
== Progress ==
* Fixed remote testing via Cbuildv2 (TCWG 324 - 3/10). Currently it
supports multiple build farms, it uses my local hardware and the
TCWG build farm, and when run via Jenkins it uses the TCWG build
farm.
* Got qemu-aarch64 built and working, added to the DejaGnu site.exp
file used by Cbuildv2, so now aarch64 execution tests actually
work. Then cloned qemu-aarch to the x86_64 tcwg build farm
machines so Jenkins can use it. (TCWG 393 - 3/10)
* Meetings and misc. (4/10)
- Worked on LCA14 presentation.
- Write documentation on how to tweak the config file for DejaGnu
used by Cbuildv2 for remote test execution.
- Got Gerritt and Jenkins integrated (thanks Paul!) so merge
requests fire up Jenkins to do builds on everything in the TCWG
build farm.
- Had ITS create a new list 'tcwg-test-results', which soon will
get buid failure notifications from Jenkins and any test
regressions.
- Added support for emailing test results to Cbuildv2.
== Plan ==
* Test the Gerrit/Jenkins integration.
* Improve new test analysis script to compare builds from more than
the same day, since now some test runs take 32hours with all the
execution tests running on a chromebook an Beagle Board.
* Travel to Connect!
== Issues ==
* Somebody needs to upgrade the crouton install on all our
chromebooks, as the current version won't build GCC native.
== Progress ==
* IAS (TCWG-377)
- Abandoning softvfp implementation, we should not use it
- Both softvfp and dwarf flags went back to kernel/android
- Macro issue has been solved, IAS is now Gold!
- Still doesn't compile the kernel, though... ;)
- Discussions about inline assembly bailing on asm garbage
* AArch64 (TCWG-387)
- Trying to get the build working and passing tests
- Some worries about config.guess updates (license)
- Commented out some old JIT tests, they will never work
- Memory allocation failures look real bugs, though
- At least Five real bugs in test-suite
* Background
- Patch reviews
- Further discussions about Dwarf vs. EH unwind tables
- Discussing vectorizer pragmas with GCC list
- Reviewing EuroLLVM14 papers
- Helping Rob upgrade TCWG Chromebooks
* Time
- CARD-862 8/10
- Others 2/10
== Plan ==
* Take a look at Compiler-RT
* Check some of the AArch64 errors
* Maybe EH/unwind issues
* Connect
Hi,
I finally got around to checking the attached patch for the
https://bugs.launchpad.net/ubuntu/+source/gcc-4.8/+bug/1270789
I noticed attached patch causes regression for pr38151.c in gcc test-suite.
A reduced test-case that triggers this is:
static unsigned long global_max_fast;
int __libc_mallopt (int param_number, int value)
{
__asm__ __volatile__ ("# %[_SDT_A2]" :: [_SDT_A2] "nor"
((global_max_fast)));
global_max_fast = 1;
}
In this regard I have couple of questions:
1. Is the in-line asm valid? Look ok to me.
2. For the pr38151.c regression, asm diff is as shown below.
< add x0, x0, :lo12:.LANCHOR0
< ldr x0, [x0]
---
> ldr x0, [x0,#:lo12:.LANCHOR0]
This causes:
pr38151.c:(.text+0x10c): relocation truncated to fit:
R_AARCH64_LDST64_ABS_LO12_NC against `.rodata'
collect2: error: ld returned 1 exit status.
If I however increase the alignment of .rodata where .LANCHOR0 is
defined, this passes. Is alignment of BITS_PER_UNIT valid for
SYMBOL_REF? If I change it as I am doing this attached patch, is there
anything else I need to do.
Thanks,
Kugan
Hi Linaro'ites
We have upgraded eglibc to 2.19 in OpenEmbedded and I started to notice
WARNING: No recipes available for:
/home/kraj/angstrom/sources/meta-linaro/meta-linaro-toolchain/recipes-core/eglibc/eglibc_2.18.bbappend
NOTE: Resolving any missing task queue dependencies
And it seems in this bbappend the SRC_URIs are overridden to point to a Linaro
release of eglibc
I wanted to know if there is a 2.19 head for linaro eglibc being created ?
in that case that bbappend needs fixing too.
Thanks
-Khem
Ganesh,
Thank you for your email - please note this question is best directed
at linaro-toolchain(a)lists.linaro.org where it is more likely to get
picked up quickly.
Our general rules for benchmarking are to use -mcpu=cortex-a## -O3 as
the compiler flags (where ## is the particular CPU you are interested
in).
Linaro's philosophy is to try and get the best results possible that
normal users will see, we don't go looking for 'magic' options that
may give better performance on one benchmark, but not in general.
Thanks,
Matt
On 20 February 2014 09:22, Gopalasubramanian, Ganesh
<Ganesh.Gopalasubramanian(a)amd.com> wrote:
> Hi,
>
> We would like to run some benchmarks in the foundation model.
> I like to know which is the best option-set (GCC compiler options) that the linaro community recommends for aarch64.
>
> Regards
> Ganesh
>
--
Matthew Gretton-Dann
Linaro Toolchain Working Group
matthew.gretton-dann(a)linaro.org
== Progress ==
- vectorizer (7/10)
- Looked into vectorizer target-hooks
- enablement of half-float for vectorising; dropped the patch after
discussing
- Started analysing code generated with unlimited model
- gcc 4.8 regression (1/10)
- Built Novemnebr and December release (native with system libc)
- Ran spec2k fp. Can see regression for ammp with -O3 (with
-march=armv7-a and -mthumb)
-Started bisecting
- Chromebook reset-up (2/10)
- SD card died and setup again
- Using hdd for gcc testing
== Plan ==
- Check ARMv5 regression for unaligned access
- Look into vectorizer cost model/benchmarking
Richard,
I found some emails about you implementing softvfp back in 2003, and
I'd like to know what is the expected behaviour when it conflicts with
the target triple, for example:
-triple arm-linux-gnueabihf + -mfpu=sofvfp+vfp
In this case, in LLVM, the triple sets "-float-abi=hard" but the fpu
would set "+soft-float-abi", which are contradictory flags.
Is that case even possible? If so, what's the expected behaviour? Soft
or hard float?
Do the extra flags always override the triple behaviour? Is it
expected that *every* compiler flag will work on a
last-seen-sets-behaviour manner?
cheers,
--renato
== Week of February 10th ==
- Reproduced STREAM performance regression. Started investigation. (3/10)
- Setup development environment on HP Chromebook 11. (3/10)
-- Chrome OS + crouton + ubuntu 12.04 + ppa/chromebook-arm -- produced a nice dev board environment.
- Continued account setup and preparations for Connect. (2/10)
- Misc. (2/10)
-- Various meetings.
-- Volunteered as admin for GCC's GSoC 2014. Filled in the application, started to stir up buzz in the GCC community.
== Week of February 17th ==
- Continue investigation of STREAM performance regression.
- Prepare FSF GCC 4.10 presentation for Connect.
- Look more into how LAVA does things and how to customize rootfs'es for boards.
-- In particular I'm interested in how to boot rootfs with matching kernel and linux-tools (perf is what I need) with ssh server on keystone board.
--
Maxim Kuvyrkov
www.linaro.org
== Progress ==
* Updated, tested and re-submitted patch for arm native
watchpoint/hwbreak rework. [2/10]
* Updated, split-up and tested patches for process record ASIMD, VFP
etc support. [TCWG-251] [TCWG-252] [3/10]
* Tried setting up gdb for aarch64, no luck yet. [TCWG-389] [1/10]
* Investigation of work required for catchpoints support for remote
gdb and gdbserver. [TCWG-263] [2/10]
* Study armv8 instruction set for record replay support. [TCWG-389] [2/10]
== Plan ==
* Follow up on upstream patches.
* Study aarch64 code and create task breakdown for record/replay
support. [TCWG-389]
* Setup gdb for aarch64 and try to run a demo application. [TCWG-389]
* Write how-to for using scripts to compare two gdb testsuite runs. [TCWG-96]
* Out of office on Tuesday and Wednesday for follow up on Macau visa
application.
== Issues ==
* none
== Progress ==
* 4.8 2014.02 Engineering release. (3/10)
* TCWG-58 : AArch64: Enable libsanitizer (2/10)
o re-based christophe's patch on fresh LLVM sources.
o committed in LLVM (Thanks Renato for your help)
o Progress stopped on this card until 4.10 GCC is opened
* LRA on AArch32:
o TCWG-343 : Make LRA the default for the ARM backend (0/10)
- No progress this week on my side.
- Vladimir upstreamed a fix for Thumb code size regression
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59535
o TCWG-345 : Analyse performance of LRA for ARM. (1/10)
- re-run Spec2K on Cortex-a15.
* Misc:
o LCA'14 : AArch64 toolchain status session. (1/10)
o Support Christian Bruel in his Linaro ramp up. (1/10)
o Various meetings. (2/10)
== Next ==
* Continue the on-going tasks
* backports review
== Issues ==
* None
== Progress ==
* Take care lp: 1270040, lp:1278337 and Beagleboard "Abort" issue.
* Respawn 2014.01 release to use newlib-linaro-2.1.0-2014.02 for
baremetal toolchains
(http://cbuild.validation.linaro.org/binaries/2014.01-01/)
* Test codes to duplicate shared compares to get more conditional
compares. Fix the bootstrap issue. But the latest test does not show
performance improvement in Spec2K.
* Rebase and test the CCMP patch.
* Read document about aarch64 CCMP/CCMN instructions and write
codes/patterns to generate the instructions. Test is ongoing.
== Plans ==
* Ccmp for AARCH64.
== Progress ==
* Figure how to have tcwgweb and cbuild-tools process the test
results from Jenkins and produce the diffs for comparison.
(TCWG-391 6/10)
* Wrote script to convert Jenkins produced data files to tcwgweb format.
(TCWG-391 1/10)
* Meetings and misc. (3/10)
- Worked on LCA14 presentation.
== Plan ==
* Continue fighting with tcwgweb to run test comparisons for Jenkins
builds. TCWG-391)
* Now that SSH is setup correctly in the TCWG build farm, GCC
testing tries to execute the remote tests, but hit's an error in
DejaGnu, which needs to be debugged and fixed. (TCWG-324)
== Leave ==
* Off to Nepal & Mt Everest after Connect.
== This week ==
Monday - Off
Reworked backports off origin instead of crypto-backport branch. Also used read/write git branch to push
- Affected backports 201164-206168, 201170, 201175, 201261, 201263 and 202020
Submitted backports for code review via git review
- Aarch64 ILP backports: 201164-206168, 201170, and 201175
- Aarch64 support for NEG in vectors registers: 201261 and 201263
- Aarch64 support for SISD shifts: 202020
== Next week ==
Submit backport 202256 for code review
Backport 202407 assigned to me
== Future ==
Things you plan to do in the future.
--
Michael Collison
Linaro Toolchain Working Group
michael.collison(a)linaro.org
== Progress ==
* IAS (TCWG-377)
- Stopping progress on .dn/.qn aliases, not suitable for IAS atm.
- Working on softvfp+vfp aliases (PR18689)
* EHABI (TCWG-124)
- Removed -arm-disable-ehabi
- Waiting for Keith's patch to work on EHABI respecting uwtables
* Compiler-RT (TCWG-125)
- Adding sanitizer guidelines for GCC developers
- Implemented --rtlib=compiler-rt for Linux targets
- Test-suite runs fine, only one error (PR18812)
* AArch64 (TCWG-387)
- First native builds, updating config.guess/sub (license issues)
- Found some JIT problems, unittests should be disabled
- Found some memory test failures
- Found 20 failures in test-suite
* Background
- Usual patch reviews & discussions
- Started a fire on GCC list, will monitor interactions closer
- Had a BoF accepted at the GNU Cauldron about GCC+LLVM collaboration
- Discussing possible LTO changes to binutils with GCC devs
- Helping Christophe/Yvan add AArch64 support for asan
* Time
- CARD-862 8/10
- Others 2/10
== Plan ==
* Continue softvfp in Clang's driver
* Work on Dwarf unwind tables
* Investigate RT and AArch64 failures
