The Linaro Toolchain Working Group is pleased to announce the release of
Linaro QEMU 2012-06.
Linaro QEMU 2012.06 is the latest release of qemu-linaro. Based off
upstream qemu, it includes a number of ARM-focused bug fixes and
enhancements.
There are no major changes with this release, though it has been updated
to the latest (1.1.0) qemu.
The source tarball is available at:
https://launchpad.net/qemu-linaro/+milestone/2012.06
More information on Linaro QEMU is available at:
https://launchpad.net/qemu-linaro
We talked at Connect about finishing up the cortex-strings work by
upstreaming them into Bionic, Newlib, and GLIBC. I've written up one
of our standard 'Output' pages:
https://wiki.linaro.org/WorkingGroups/ToolChain/Outputs/CortexStrings
with a summary of what we did, what else exists, benchmark results,
and next steps. This can be used to justify the routines to the
different upstreams.
The Android guys are going to upstream these to Bionic. I need a
volunteer to do Newlib and GLIBC.
One surprise was that the Newlib plain C routines are very good on
strings - probably due to a good end of string detector.
-- Michael
Hi,
OpenEmbedded-Core/meta-linaro:
* worked on building oe-core+meta-linaro using the 2012.05 release of
the binary toolchain
* minimal sysroot contains libraries that reference the old
ld-linux.so.3 loader
* created #1011671
* otherwise works fine for oe-core+meta-linaro
* setup the build env on tcserver01
* verified the 2012.06 RC of linaro GCC 4.7 and 4.6
* 4.7 looks good
* 4.6 has ICE when building Qt -mfpu=neon
* reduced testcase available at bug #1013209
* updated meta-linaro (master) to pull in version 2012.06 of Linaro
GCC 4.6/4.7
Regards,
Ken
Hello,
I am wondering if there is support for gettext in the linaro toolchain?
How can I check it if it should work or not?
I can compile and link the "setlocale()" and "bindtextdomain()" and
"textdomain()" functions, however, the translation doesn't work.
Best regards
Tom,
--
*Tom Deblauwe*
*R&D Engineer*
Traficon International N.V.
Vlamingstraat 19
B-8560 Wevelgem
Belgium
Tel.: +32 (0)56 37.22.00
Fax: +32 (0)56 37.21.96
URL: www.traficon.com <http://www.traficon.com>
I noticed this bug upstream about C++11 and C++98 ABI
incompatibilities , in case someone is using the C++11 features,
please be aware that there is an ABI bug lurking.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53646
Ramana
The Linaro Toolchain Working Group is pleased to announce the release of
Linaro GDB 7.4 2012.06.
Linaro GDB 7.4 2012.06 is the third release in the 7.4 series. Based off
the latest GDB 7.4.1, it includes a number of bug fixes.
Interesting changes include:
* GDB now expands tildes in solib-search-path entries.
* Updated to the GDB 7.4.1 code base.
https://launchpad.net/gdb-linaro/+milestone/7.4-2012.06
More information on Linaro GDB is available at:
https://launchpad.net/gdb-linaro
--
[]'s
Thiago Jung Bauermann
Linaro Toolchain Working Group
The Linaro Toolchain Working Group is pleased to announce the 2012.06
release of both Linaro GCC 4.7 and Linaro GCC 4.6.
Linaro GCC 4.7 2012.06 is the third release in the 4.7 series. Based
off the latest GCC 4.7.0+svn188038 release, it includes performance
improvements especially around 64 bit operations.
Interesting changes include:
* Updates to GCC 4.7.0+svn188038
* Adds multilib support for use in the binary builds
* Improves performance of 64 bit shifts in core registers
Fixes:
* LP: #949805 GCC doesn't by default use %gnu_unique_object
* LP: #990530 internal compiler error: in convert, at lto/lto-lang.c:1292
* An off-by-one error in vrev
Linaro GCC 4.6 2012.06 is the sixteenth release in the 4.6 series.
Based off the latest GCC 4.6.3+svn188320 release, this is the third
release after entering maintenance.
Interesting changes include:
* Updates to 4.6.3+svn188320
* Uses the new /lib/ld-linux-armhf.so.3 loader for hard float binaries
Fixes:
* LP: #949805 GCC doesn't by default use %gnu_unique_object
* LP: #990530 internal compiler error: in convert, at lto/lto-lang.c:1292
The source tarballs are available from:
https://launchpad.net/gcc-linaro/+milestone/4.7-2012.06https://launchpad.net/gcc-linaro/+milestone/4.6-2012.06
Downloads are available from the Linaro GCC page on Launchpad:
https://launchpad.net/gcc-linaro
More information on the features and issues are available from the
release page:
https://launchpad.net/gcc-linaro/4.7/4.7-2012.06
Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain
Bugs: https://bugs.launchpad.net/gcc-linaro/
Questions? https://ask.linaro.org/
Interested in commercial support? Inquire at support(a)linaro.org
-- Michael
On 12 June 2012 18:53, Akash D <akashd(a)renuelectronics.com> wrote:
> Hello Michael,
>
> Thanks for reply.
>
> The required information is mentioned below.
>
> Compiler Used --->
>
> http://launchpad.net/gcc-arm-embedded
>
> Version number ---->
>
> arm-none-eabi-gcc (GNU Tools for ARM Embedded Processors) 4.6.2 20110921
> (release) [ARM/embedded-4_6-branch revision 182083]
Yip, this is ARM's Cortex-R & M bare metal toolchain. It doesn't come
directly from Linaro but we've got a good relationship with them.
I'll ping them and see the best place to ask this question.
> The link file is attached with this mail.
I only had a quick read, but you're missing a capture for the
'.text.startup' section in the linker script. You might need
something like:
*(.text.startup)
before the one.o(.text) line or to change the *(.text) capture to
*(.text*). The startup section might need to be at a fixed address.
Please check your chip and toolchain documentation to confirm.
-- Michael
While benchmarking the auto-vectoriser on Libav, I noticed a performance
regression in gcc 4.7 (both FSF and Linaro) compared to gcc 4.6 in the AAC
decoder. I narrowed it down to this function:
static void ps_hybrid_analysis_ileave_c(float (*out)[32][2],
float L[2][38][64],
int i, int len)
{
int j;
for (; i < 64; i++) {
for (j = 0; j < len; j++) {
out[i][j][0] = L[0][j][i];
out[i][j][1] = L[1][j][i];
}
}
}
While gcc 4.6 does not attempt to vectorise this at all, 4.7 goes crazy
with a massive slowdown, about 20x slower than non-vectorised with Linaro
4.7 and much worse with FSF 4.7.
Let me know if you need more information.
--
Mans Rullgard / mru
== Progress ==
* Connect last week.
* Worked through the open issues and open work items related to
performance and we've got a clear list of things that are currently in
flight. Now to keep track of this better.
https://wiki.linaro.org/RamanaRadhakrishnan/Sandbox//RRQ212ConnectNotes
and move this away from the wiki page in a form that we can use to
talk during our regular performance meetings.
* Created blueprints, closed down old issues and reprioritized
issues with Ulrich and others.
* A number of interesting conversations during Connect for a number
of compiler related issues.
* Other sessions that I attended included the Android optimizations
sessions - while there was quite a bit about toolchain performance it
is important that we keep looking out for the performance profiles and
find areas where the toolchain can be improved. However this can't be
done without getting more testcases from other groups. There were a
couple of interesting comments made that skia is CPU bound which would
indicate that the paint function is CPU bound. But why and how ?
Someone should look at reproducing these numbers and see where we get
to in this area. Pointed out that cortex-strings might be good to make
it into bionic ?
* Fixed the vrev off by one error and committed to FSF trunk .
However it couldn't make it in time for FSF 4.7.1 as the merge window
had closed by then.
* Set up my panda board to be identical to what runs on our
validation labs etc.
* This week
* Worked through the merge requests and moved some patches
upstream away from the "toreview" state.
* Landed a few merge requests that were approved but hadn't been
done so. Took care of merging the upstream 4.7 branch.
* Given I only had a few hours back in the office this week I
worked on regenerating arm_neon.h to use __builtin_shuffle with
vrev64, vrev32, vtrn , vzip and vuzp. A follow up patch needs to do
the same for vext but that needs generic support also in
vec_perm_const_ok .Once that is done I think we can safely start
rewriting . It still needs some more testing and polishing up but the
initial results on the testcase from PR48941 is kind of neat. The
result for some of the other testcases that I've looked at also looks
much better than where we were a few weeks back. So all in all nice
progress on that front. However we have to also find a way of getting
these generated at O0 which they don't appear to do so cleanly enough
with this approach.
for one example it does look like this below: Notice those spills
beginning to disappear .... :)
New :
sqrlen4D_16u8:
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 0, uses_anonymous_args = 0
@ link register save eliminated.
vabd.u8 q1, q0, q1
vmull.u8 q0, d2, d2
vmull.u8 q8, d3, d3
vuzp.32 q0, q8
vpaddl.u16 q0, q0
vpadal.u16 q0, q8
bx lr
Old :
sqrlen4D_16u8:
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 1, uses_anonymous_args = 0
@ link register save eliminated.
vabd.u8 q1, q0, q1
stmfd sp!, {r4, fp}
add fp, sp, #4
sub sp, sp, #48
add r3, sp, #15
vmull.u8 q0, d2, d2
bic r3, r3, #15
vmull.u8 q8, d3, d3
vuzp.32 q0, q8
vstmia r3, {d0-d1}
vstr d16, [r3, #16]
vstr d17, [r3, #24]
vpaddl.u16 q0, q0
vpadal.u16 q0, q8
sub sp, fp, #4
ldmfd sp!, {r4, fp}
bx lr
* Attended platform / WG sync-up.
== Plans ==
* Cleanup the ml bits of rewiring the intrinsics and try some proper testcases.
* Work on the auto-inc-dec scheduler patches.
* Rework the sched-pressure patch upstream .
* Review the Android benchmarking writeups.
Summary:
* Bug fixes.
* Tune ivopt for code size.
Details:
1. Reproduce lp:1007353 "kernel build fails with 12.04 and 12.05
toolchain released" and workout a patch to fix it; reopen the related
binutils/gas bug http://sourceware.org/bugzilla/show_bug.cgi?id=12698
and propose the patch to it; push the patch to linaro crosstool-ng to
make sure lp:1007353 is fixed for next binary toolchain release.
2. Setup the SPEC build env and reproduce lp: 886124 "using LDR from
literal pool rather than MOVW/MOVT". After cprop1 replaces lo_sum
(high: symbol_ref bloc) (symbol_ref (block)) with a (symbol_ref
(block)), no later optimization can split it. The solution in linaro
4.5 is to add a split (porting from codesourcery) in arm.md. Then
split1 can split the (symbol_ref (block)). The split is:
(define_split
[(set (match_operand:SI 0 "arm_general_register_operand" "")
(match_operand:SI 1 "general_operand" ""))]
"TARGET_32BIT
&& TARGET_USE_MOVT && GET_CODE (operands[1]) == SYMBOL_REF
&& !flag_pic && !target_word_relocations
&& !arm_tls_referenced_p (operands[1])"
[(clobber (const_int 0))]
{
arm_emit_movpair (operands[0], operands[1]);
DONE;
})
3. Tune ivopt for code size. Try to set avg_loop_niter to 1 since loop
iterator number does not impact code size. But test shows there is no
improvement. Need more tuning.
Plans:
* Analyze the failed cases in arm-linux-gnueabihf regression test.
* Tune code size for M0.
Best regards!
-Zhenqiang
Hello Sir/Madam,
I am using MK60FN1M0VLQ12 (COTREX-M4) processor for my development.
I am using float and double data types in my code. When I perform any
mathematical operation on these variables, the processor goes to Hard Fault
Exception.
Earlier I have used GCC 4.5.2 compiler for my compilation
So now I am using Linaro's GNU-GCC Toolchain 4.6.2 for compiling my code
with following command.
arm-none-eabi-gcc -Wall -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -mcpu=cortex-m4
-mthumb -Qn -Os -mlong-calls -c main.c -o main.o
But I am getting following error while linking my code
ld: section .text.startup loaded at [00032258,000331cb] overlaps section
.InitializedVariables loaded at [00032258,00032787]
The link file is attached with this mail.
Can you please suggest me some solution for this problem.
Can you also suggest some compiler commands to support float and double data
type using software.
Awaiting for your reply,
Thanks & Regards,
Akash
== GCC ==
* Worked on reimplementing reassociation pass based on
review comments I had received.
* Identified root cause and worked on fix for vectorizer
bug causing unaligned memory accesses (reported by Mans).
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand | Phone: +49-7031/16-3727
STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk
Wittkopp
Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht
Stuttgart, HRB 243294
Hi,
OpenEmbedded-Core/meta-linaro:
* fixed the binary toolchain support on master (still 2012.03)
* fixed armhf support for Linaro GCC 4.6 on master
* backport of Linaro GCC 4.7 r114985
* tested the images using QEMU - no failures
* now the master branch supports building images for ARM, MIPS, PPC,
X86 and X86_64 using the latest (2012.05) releases of Linaro GCC
4.6 or 4.7
* add tags on meta-linaro to easily find the revision for a particular
Linaro GCC
* changed cbuild to pull in the master branches of OE-Core and
meta-linaro
* merged the branch that allows to build OpenEmbedded-Core using cbuild
http://bazaar.launchpad.net/~kwerner/cbuild/oecore/changes/
* updated docs on the wiki
Misc:
* public holiday on Thu, vacation on Fri
* I'll be back on Monday : )
Regards,
Ken
Hi,
GDB for Android:
* Submitted and committed trivial patch to gdbserver which made it
compile again on Android. A patch had been added which made gdbserver
use a MIPS-related constant which Android doesn't provide.
* Compared testsuite results of GDB on Android vs regular Linux.
Unfortunately there's a lot of noise because the GCC 4.4 used by
the Android SDK generates bad debuginfo which confuses GDB and breaks
a lot of tests. Overall, it seems GDB on Android is in a generally
good
shape. Still need to run the testsuite again with an Android based on
a newer compiler to have a better comparison.
* Mozilla has a GDB patch to call gdbarch_addr_bits_remove before
comparing PCs in breakpoint handling which seems like a sensible thing
to do. Still, running the testsuite with and without this patch didn't
make a difference on Android or regular Linux.
* Remotely attended the GDB for Android session at Connect. Prepared
the following page to go with it:
https://wiki.linaro.org/ThiagoBauermann/Sandbox/AndroidGDBConnectSession
--
[]'s
Thiago Jung Bauermann
Linaro Toolchain Working Group
Hi,
GDB for Android:
* Created patch to expand the ~ in "set solib-search-path". Despite
doing the right thing in other commands, GDB doesn't understand ~ in
solib-search-path, which made me lose some time in a debugging session
trying to figure out what was going on. Committed upstream.
* Looked into AOSP patch which hardcodes use of fork tracing instead of
thread events. Found out that gdbserver actually already prefers fork
tracing on both Linux and Android (tested on ICS and Linaro 12.04).
This must have been a problem in some earlier version, and the patch
is
unnecessary now.
* Set up a QEMU instance with Linaro Android 12.04. Got dropbear ssh
on it and ran the GDB testsuite remotely on the VM.
--
[]'s
Thiago Jung Bauermann
Linaro Toolchain Working Group
Hi,
OpenEmbedded-Core/meta-linaro:
* added a default xorg.conf for the qemuarmv7a MACHINE
* necessary because OE-Core master switched from Xfbdev to Xorg
* noticed that hard float with Linaro GCC 4.6 works on denzil but is
broken on master
due to differences on the requested/provided interpreter
* it used to (accidentally?) work when /lib/ld-linux.so.3 was used
even for armhf
* need to check out what loader name OE-Core really wants to use
* worked on getting OE-Core to build with Linaro GCC 4.7
* verified that the recipes for Linaro GCC 4.7 are working for ARM,
MIPS, PPC, X86, X86_64
* all images are working!
* updated the wiki pages
Regards,
Ken
Linaro Connect edition...
RAG:
GREEN: productive Connect, hammered out a KVM TODO list
* As usual, most sessions don't really intersect with KVM/QEMU work,
so the bulk of the benefit of the week was in informal discussions
and hacking sessions. Useful outcomes there:
* Dragged Rusty through some of the more obscure corners of the
ARM architecture, in the course of doing a review of all the
A15 cp15 registers and how KVM should handle them
* Thrashed out a todo list for getting to "initial upstreamable
patchset" for KVM:
https://docs.google.com/document/d/1TSpDKQZ-6u-HH_2BNY_85jDStI2YDhENf5-z8Nb…
* Nailed down a few decisions we'd left hanging for a bit
* A few sessions that seem worth mentioning:
* Enterprise bootloaders
Jon M definitely pushing the idea that servers will want ACPI,
UEFI, etc all to look as consistent and like x86 as possible. This
includes a desire for UEFI in the virtual environment provided by
QEMU/KVM. We've been aware we might want to do that, but there is
definitely some work to do to get UEFI running (probably a combo of
QEMU bugfixes/feature work and patching UEFI). Total work required
hard to estimate because you just have to keep fixing bugs until it
works... (The push for UEFI was repeated in a couple of other
sessions too.)
* v8 discussion
The question of whether there will be a v8 QEMU was raised (again).
There do seem to be enough people interested that we should be able
to collaborate on a user-mode emulator, which I think is a good
outcome. This will obviously depend on release of enough public
info on the architecture.
* KVM performance
Bit of a null session, as it turns out that we aren't really ready
to think about performance. We believe there aren't any obvious
areas requiring optimisation in the current KVM patchset. Virtio is
the only thing to be added later, and this is really just missing
QEMU side rather than needing specific kernel support. We did take
the opportunity to go through our TODO list for KVM functionality;
nobody raised anything we'd missed, so that's good.
-- PMM
The Linaro Toolchain Working Group is pleased to announce the 2012.05
release of the Linaro Toolchain Binaries, a pre-built version of
Linaro GCC and Linaro GDB that runs on generic Linux or Windows and
targets the glibc Linaro Evaluation Build.
Uses include:
* Cross compiling ARM applications from your laptop
* Remote debugging
* Build the Linux kernel for your board
What's included:
* Linaro GCC 2012.05
* Linaro GDB 2012.04
* A statically linked gdbserver
* A system root
* Manuals under share/doc/
The system root contains the basic header files and libraries to link
your programs against.
Interesting changes include:
* Updates the system root to Ubuntu Precise
* Switches to the arm-linux-gnueabihf triplet
* Compiles programs for hard float by default
* Includes soft float support for ARMv4T and later systems
* Includes debug symbols for debugging and backtracing the C library
The Linux version is supported on Ubuntu 10.04.3 and 12.04, Debian
6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation
5.7 and later, and should run on any Linux Standard Base 3.0
compatible distribution. Please see the README about running on
x86_64 hosts.
The Windows version is supported on Windows XP Pro SP3, Windows Vista
Business SP2, and Windows 7 Pro SP1.
The binaries and build scripts are available from:
https://launchpad.net/linaro-toolchain-binaries/trunk/2012.05
Need help? Ask a question on https://ask.linaro.org/
Already on Launchpad? Submit a bug at
https://bugs.launchpad.net/linaro-toolchain-binaries
On IRC? See us on #linaro on Freenode.
Other ways that you can contact us or get involved are listed at
https://wiki.linaro.org/GettingInvolved.
Thanks to the change in the schedule the agenda is here.
https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-05-28
If there are any topics folks would like to add to this for today
please feel free to do so now given we have a session in under 2
hours.
regards,
Ramana
Progress
* Fixed PR53334 upstream - something that broke eembc builds.
* Usual meetings.
* Work through some of the speed tickets and upstream bugzilla perf
tickets in preparation for connect.
* Prepared for connect. Looked through some open issues and
investigating PR48941 patch. Uli and I had some discussions around the
patches for this and I had an idea later this evening to try out
something with __builtin_shuffle which certainly looks interesting and
is effectively what we came up with . It's probably better to use
__builtin_shuffle rather than inventing something on our own. In the
process found a bug with automatic rev generation from vec_perm
expressions and that should now be fixed.
* Worked through the auto-inc-dec stuff. Still needs some work and
looks unlikely to complete before connect and that's something I need
to keep working through.
* Prepared for connect.
Plans
* Connect next week !
Absences:
28 May - 1 June : Linaro Connect
