- linaro-toolchain - lists.linaro.org

Spec 2000 broken?

by Andrew Stubbs

Hi Michael, I ran the benchmark tests on GCC 4.7, but the spec2000 run seems to have failed. This is both on the baseline, and on my patch. See here: http://ex.seabright.co.nz/benchmarks/gcc-linaro-4.7%2bbzr114968~ams-codesou… Andrew

13 years, 9 months

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Saturated operations

by Michael Hope

Hi Ulrich. The saturated work you're doing at the moment - is it the saturated add/subtract QADD/QSUB/QDADD/QDSUB or the ARMv6 saturate-word-with-shift SSAT/USAT? I've updated the old blueprint and added a new one for SSAT/USAT: https://blueprints.launchpad.net/gcc-linaro/+spec/armv6-saturation-instruct… https://blueprints.launchpad.net/gcc-linaro/+spec/armv5-saturated-ops and was wondering which to put against your name. -- Michael

13 years, 9 months

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Fleshing out the QEMU blueprints

by Michael Hope

Hi Peter, Rusty. I've fleshed out the KVM blueprints a bit more at: https://wiki.linaro.org/MichaelHope/Sandbox/Q1.12ToDo Notable is adding validation and de-PENDING a few things. I need to know the following things before talking to Validation and Platforms about things that are in their queue: * What's the host kernel? Christoffers, or a linux-linaro-kvm based off his plus work in progress? * What's the guest kernel? * Anything special that needs to be in the host rootfs outside qemu and libvirt? Do you have a host and guest kernel .config that I can pass on to Platforms? -- Michael

13 years, 9 months

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[ACTIVITY] Feb 20 - Feb 24

by Thiago Jung Bauermann

Hi, GDB on Android: * Set up cross compiling environment using both the Android toolchain and the Linaro toolchain. * Tested Android and Mozilla GDB running as a native binary on the Linaro Android image on qemu. None of them were able to see all threads in a multi-threaded process. The same happens with a native binary on Android talking to a gdbserver on localhost. * I was able to produce an Android GDB 7.1.x binary which when running on an i386 host talking to the Android SDK emulator sees all threads. It is not able to generate a backtrace though. * Carnival holidays. -- []'s Thiago Jung Bauermann Linaro Toolchain Working Group

13 years, 9 months

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[ACTIVITY] 20th - 24th February

by Andrew Stubbs

Investigated and produced and patch for bug lp936863. Continued work on 64-bit shifts. I updated my neon shifts patch twice: once to take -Os optimization into account, and once because I noticed that the CC clobbers were being retained even after they were known to be not required, and presumably this could be a bad thing. Posted a patch to improve SI->DImode sign- and zero-extends that also move values from core registers to neon registers. Wrote a patch to implement negation in neon register, albeit at the cost of a scratch register to hold the constant zero. This worked, but insisted on loading the zero from memory, despite the fact that NEON has a suitable instruction for loading zero. Attempted to get "vmov dN, #0" to work. The problem appears to be that DImode loads are handled by the VFP load pattern in vfp.md and that that doesn't seem to DTRT for integer constants. I've got as far as trying to figure out what it does do, but there's more to be done to get to the bottom of the problem. Tried to get the benchmarking going for 64-bit shifts. Unfortunately ursa1 has been experiencing outages. Michael has been trying to fix it, but so far I've not been able to run anything there. Instead, I've launched benchmark runs via Michael's normal test infrastructure. Hopefully this can replace the manual ones anyway. That would be more convenient.

13 years, 9 months

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Running pre-built linaro toolchain failed on Ubuntu 11.04, 64bit server

by Lv Terry-R65388

Hi, I'm trying to use pre-built version of linaro toolchain for cross-compiler in Ubuntu 11.04 on our 64bit server. I got it from http://people.linaro.org/~michaelh/incoming/binaries/. When I run arm-linux-gnueabi-gcc to compile a c source, it says "No such file or directory". The steps are as below: 1. Unpack gcc-linaro-arm-linux-gnueabi-2011.12-20111219+bzr2309~linux.tar.bz2. 2. Rename gcc-linaro-arm-linux-gnueabi-2011.12-20111219+bzr2309~linux to arm-fsl-linux-gnueabi. 3. Copy to ~/toolchain_ltib/gcc-linaro-4.6.3-glibc-2.13-singlelib-2011.12/ 2. Use arm-linux-gnueabi-gcc to compile my code. The output is: r65388@shlinux3:~/MEMCPYBM$ ~/toolchain_ltib/gcc-linaro-4.6.3-glibc-2.13-singlelib-2011.12/arm-fsl-linux-gnueabi/bin/arm-linux-gnueabi-gcc -bash: /home/r65388/toolchain_ltib/gcc-linaro-4.6.3-glibc-2.13-singlelib-2011.12/arm-fsl-linux-gnueabi/bin/arm-linux-gnueabi-gcc: No such file or directory I have installed lsb 4.0 and libc6 2.13. r65388@shlinux3:~/MEMCPYBM$ dpkg -s lsb Package: lsb Status: install ok installed Priority: extra Section: misc Installed-Size: 48 Maintainer: Ubuntu Developers <ubuntu-devel-discuss(a)lists.ubuntu.com> Architecture: all Version: 4.0-0ubuntu16 ... r65388@shlinux3:~/MEMCPYBM$ dpkg -s libc6-dev Package: libc6-dev Status: install ok installed Multi-Arch: same Priority: optional Section: libdevel Installed-Size: 11888 Maintainer: Ubuntu Developers <ubuntu-devel-discuss(a)lists.ubuntu.com> Architecture: amd64 Source: eglibc Version: 2.13-20ubuntu5 Provides: libc-dev Depends: libc6 (= 2.13-20ubuntu5), libc-dev-bin (= 2.13-20ubuntu5), linux-libc-dev Recommends: gcc | c-compiler Suggests: glibc-doc, manpages-dev Breaks: binutils (<< 2.20.1-1), binutils-gold (<< 2.20.1-11), cmake (<< 2.8.4+dfsg.1-5), gcc-4.4 (<< 4.4.6-3ubuntu1), gcc-4.4-base (<< 4.4.6-3ubuntu1), gcc-4.5 (<< 4.5.3-1ubuntu2), gcc-4.5-base (<< 4.5.3-1ubuntu2), gcc-4.6 (<< 4.6.0-12), gcj-4.4-base (<< 4.4.6-2ubuntu2), gcj-4.5-base (<< 4.5.3-1ubuntu2), gnat-4.4-base (<< 4.4.6-1ubuntu3), libhwloc-dev (<< 1.2-3), libjna-java (<< 3.2.7-4), liblouis-dev (<< 2.3.0-2), liblouisxml-dev (<< 2.4.0-2), make (<< 3.81-8.1), pkg-config (<< 0.26-1) ... Do you know why? How can I fix this issue? Thanks~~ Yours Terry

13 years, 9 months

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[Activity] Week 8

by Zhenqiang Chen

Summary: * Linaro binary toolchain 2012.02 release. * Try the Multilib patch on linaro toolchain. Details: 1. Linaro binary toolchain 2012.02 release. * Create linaro license file based on embedded toolchain, add crosstool-ng and sysroot (eglibc) license. * Tests on win7, oneiric and RHEL5. 2. Try to apply the multilib patch used in embedded toolchain to linaro toolchain. * The multilib solution can not work together with the multiarch patch. (1) With both patches, "gcc -print-multi-lib" can only print one option. (2) With only multilib patch, "gcc -print-multi-lib" can print the multilib list. * Successfully build a multilib toolchain (Based on the prebuilt oneiric-sysroot with directory structure change for include and lib.) without the multiarch patch and c++ support. Plans: 1. Try crosstool-ng 1.14 to build multilib eglibc. 2. Investigate how to make multiarch and multilib work together. Planed leaves: * Mar. 1-2. Best regards! -Zhenqiang

13 years, 9 months

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KVM blueprints

by Michael Hope

Hi Peter, Rusty. I've written down my notes from Connect and drafted the blueprints at: https://wiki.linaro.org/MichaelHope/Sandbox/Q1.12ToDo I've put my priories on things and sorted them by relative importance. I'll check tomorrow if there's a good match between this, the KVMEpic spec, and the older task spreadsheet. Most of these are too short. I don't know what's involved with the CP15 work. Some still have big PENDINGS. Please edit and correct. There's a lot of work there. Some is on other teams but I'm concerned. -- Michael

13 years, 9 months

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[ACTIVITY] Feb 20 - Feb 24

by Ulrich Weigand

== GCC == * Merged Ira's remaining vectorizer patches into Linaro GCC 4.7. * Merged Richard's sched-pressure patch (enabled by default on ARM) into Linaro GCC 4.7. Asked IBM colleagues for benchmark results on s390 and rs6000 as well. * Committed patch to enable vect_condition tests in FSF mainline, FSF 4.6, and Linaro GCC 4.7. * Verified that Linaro GCC 4.7 now contains every feature that was present in Linaro GCC 4.6. * Rebased and re-benchmarked fwprop-subreg patch. * Ongoing work on a patch to generate usat/ssat instructions where appropriate. * Worked on improving end-of-loop value computation. * Fixed mainline .init_array/.fini_array regression on certain newlib targets. * Reviewed several merge requests. 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

13 years, 9 months

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[Activity] Week 8

by Ramana Radhakrishnan

On holiday last week and at connect week before that. ==Progress=== * Recovered from jet-lag and started to catch up on email. * Patch review week. * Cleared out a bit of my patch backlog. * Helped Asa with some bug triaging. * Read up a bit about ssat and usat and what we should be doing with other tuning for them. * Looked up some performance profiles with v8 benchmarks . Reviewed the Android benchmark numbers. * Booked tickets for connect 2012.q2 * Wrote up connect week discussions on libav regressions . === Plans === * Clear out more pending patches ( PGO next on the hit list and the vmla investigation) * Investigate partial-partial PRE results. * Finish off the ABI tests. Absences. * 1 week holiday sometime before that - to be booked. * Linaro Connect Q2.12 - May 28 - June 1

13 years, 9 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, OpenEmbedded: * added initial support for the Linaro GCC 4.6 based toolchain to the meta-linaro layer. * allows to build the Linaro toolchain the OE way * successfully built the core-image-sato but when running inside QEMU the GUI isn't usable (needs investigation) glibc: * built glibc+glibc-ports natively on ARM * the upstream glibc testsuite isn't aware of the multiarch paths and therefore it won't find some libs (libgcc_s, libstdc++) * workaround using symlinks; wiki updated: https://wiki.linaro.org/KenWerner/Sandbox/HowToBuildToolchainComponents#gli… Regards, Ken

13 years, 9 months

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Re: gcc: Thumb interworking and weakly linked functions

by V, Aneesh

+ linaro-toolchain Hello Ulrich, I want to revisit this old thread. Sorry for the sloppy follow-up. But, this time around I have more data. On Tue, Mar 15, 2011 at 9:00 PM, Ulrich Weigand <Ulrich.Weigand(a)de.ibm.com> wrote: > Aneesh V <aneesh(a)ti.com> wrote: > >> I was trying to build u-boot in Thumb2 for OMAP4. Everything was fine >> until I added some patches recently. One of these patches introduced an >> API (let's say foo()) that has a weakly linked alias(let's say >> __foo()) and a strongly linked implementation(the real foo()) in an >> assembly file. >> >> Although I give -mthumb and -mthumb-interwork for all the files, >> apparently GCC generates ARM code for assembly files. In the final >> image foobar() calls foo() using a BL. Since foobar() is in Thumb and >> foo() in ARM, it ends up crashing. Looks like foobar() assumed foo() >> to be Thumb because __foo() is Thumb. > > I'm unable to reproduce this. Do you have a complete test case? > > I've tried with the following small example: > > foo1.c: > > extern void foo (void) __attribute__ ((weak, alias ("__foo"))); > > void __foo (void) > { > } > > int main (void) > { > foo (); > } > > foo2.S: > .text > .align 2 > .global foo > .type foo, %function > foo: > push {r7} > add r7, sp, #0 > mov sp, r7 > pop {r7} > bx lr > .size foo, .-foo > > When building just "gcc foo1.c", I get: > > 0000835c <__foo>: > 835c: b480 push {r7} > 835e: af00 add r7, sp, #0 > 8360: 46bd mov sp, r7 > 8362: bc80 pop {r7} > 8364: 4770 bx lr > 8366: bf00 nop > > 00008368 <main>: > 8368: b580 push {r7, lr} > 836a: af00 add r7, sp, #0 > 836c: f7ff fff6 bl 835c <__foo> > 8370: 4618 mov r0, r3 > 8372: bd80 pop {r7, pc} > > When building both files "gcc foo1.c foo2.S", I get instead: > > 00008368 <main>: > 8368: b580 push {r7, lr} > 836a: af00 add r7, sp, #0 > 836c: f000 e802 blx 8374 <foo> > 8370: 4618 mov r0, r3 > 8372: bd80 pop {r7, pc} > > 00008374 <foo>: > 8374: e92d0080 push {r7} > 8378: e28d7000 add r7, sp, #0 > 837c: e1a0d007 mov sp, r7 > 8380: e8bd0080 pop {r7} > 8384: e12fff1e bx lr > > > So it seems to me the linker is handling this correctly ... > > (This is on Ubuntu Natty using system gcc and binutils.) I could reproduce the problem on older tool-chain(Sourcery G++ Lite 2010q1-202) [1] with a modified version of your sample code: a.c: ==== extern void foo (void) __attribute__ ((weak, alias ("__foo"))); void __foo (void) { } extern void call_foo(void); int main (void) { call_foo (); } b.S: ==== .text .align 2 .global foo foo: push {r7} add r7, sp, #0 mov sp, r7 pop {r7} bx lr .size foo, .-foo c.S .text .align 2 .global call_foo call_foo: bl foo bx lr .global __aeabi_unwind_cpp_pr0 __aeabi_unwind_cpp_pr0: bx lr Now, I build them using the following commands, which is similar to what U-Boot does: arm-none-linux-gnueabi-gcc -mthumb -mthumb-interwork -c a.c arm-none-linux-gnueabi-gcc -mthumb -mthumb-interwork -c b.S arm-none-linux-gnueabi-gcc -mthumb -mthumb-interwork -c c.S arm-none-linux-gnueabi-ld -r a.o -o alib.o arm-none-linux-gnueabi-ld -r b.o -o blib.o arm-none-linux-gnueabi-ld -r c.o -o clib.o arm-none-linux-gnueabi-ld --start-group clib.o alib.o blib.o --end-group -o a.out armobjdump -S --reloc a.out You will get something like: 00008094 <call_foo>: 8094: fa000006 blx 80b4 <foo> 8098: e12fff1e bx lr Please note that that the 'blx' is not correct. Now, do the following change: diff --git a/b.S b/b.S index e0f2de9..96dba1f 100644 --- a/b.S +++ b/b.S @@ -1,5 +1,6 @@ .text .align 2 +.type foo, %function .global foo foo: push {r7} And build it again the same way and you will see: 00008094 <call_foo>: 8094: eb000006 bl 80b4 <foo> 8098: e12fff1e bx lr I can't reproduce this on Linaro GCC 2012.01, so looks like the problem is solved in recent tool-chains. However, sadly I could reproduce a different but similar problem with Linaro GCC 2012.01. This time the call is from C(Thumb) to assembly(ARM) and no weakly linked symbols are involved. a.c: ==== int main (void) { foo (); } b.S: ==== .text .align 2 .global foo foo: push {r7} add r7, sp, #0 mov sp, r7 pop {r7} bx lr .size foo, .-foo .global __aeabi_unwind_cpp_pr0 __aeabi_unwind_cpp_pr0: bx lr arm-linux-gnueabi-gcc -mthumb -mthumb-interwork -c a.c arm-linux-gnueabi-gcc -mthumb -mthumb-interwork -c b.S arm-linux-gnueabi-ld -r a.o -o alib.o arm-linux-gnueabi-ld -r b.o -o blib.o arm-linux-gnueabi-ld --start-group alib.o blib.o --end-group -o a.out arm-linux-gnueabi-objdump -S --reloc a.out gives: 8076: af00 add r7, sp, #0 8078: f000 f802 bl 8080 <foo> 807c: 4618 mov r0, r3 It should have been "blx 8080 <foo>", isn't it? Again, %function solves it. I agree that not marking the assembly functions ' %function' is a problem in the code, so it's not a critical bug. But I would've been happier if the linker refused to link it rather than branching with the wrong instruction. Isn't that a problem? Problem No:2 ************* Linaro GCC 2012.01 is giving a new problem w.r.to Thumb build that is not existing in Sourcery G++ Lite 2010q1-202. However, I couldn't reproduce this problem with a small program like above. So, let me give you reference to the original u-boot code that shows the problem and steps to reproduce it. tree: git://github.com/aneeshv/u-boot.git branch: thumb The above branch has mainline u-boot with 4 additional patches from me for enabling Thumb build. You can build it like this: make CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm distclean make CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm omap4_sdp4430 This builds two images u-boot and u-boot-spl. SPL is a tiny u-boot that runs from internal RAM and loads the u-boot to SDRAM. Now, please have a look at the map file of u-boot-spl which is at: spl/u-boot-spl.map I see the following in my map file: /spl/u-boot-spl.map: ================= .rodata.wkup_padconf_array_essential_4460 0x40309583 0x4 board/ti/sdp4430/libsdp4430.o 0x40309583 wkup_padconf_array_essential_4460 .rodata.wkup_padconf_array_essential 0x40309587 0xc board/ti/sdp4430/libsdp4430.o 0x40309587 wkup_padconf_array_essential .rodata.core_padconf_array_essential 0x40309593 0x60 board/ti/sdp4430/libsdp4430.o 0x40309593 core_padconf_array_essential Please note that the .rodata symbols have odd addresses. These arrays actually need to be aligned at least to half-word boundary. In fact, in the image I verified that they are put at even addresses. So, the symbols have been kept as real address +1. I understand that this is the convention for Thumb functions. I guess the tool-chain did it for data too?? And I am getting unaligned access aborts on accessing them. I notice that this doesn't happen with all .rodata. symbols in the image. I couldn't see any difference between working and non-working files nor any difference in the command used to build them! Well, this doesn't happen if I don't use "-fdata-sections" in gcc options. So, apply the following patch and you will see that those symbols have even addresses now. diff --git a/config.mk b/config.mk index ddaa477..723286a 100644 --- a/config.mk +++ b/config.mk @@ -190,7 +190,7 @@ CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ # Enable garbage collection of un-used sections for SPL ifeq ($(CONFIG_SPL_BUILD),y) -CPPFLAGS += -ffunction-sections -fdata-sections +CPPFLAGS += -ffunction-sections LDFLAGS_FINAL += --gc-sections endif /spl/u-boot-spl.map: ================= .rodata 0x40309204 0x38c board/ti/sdp4430/libsdp4430.o 0x40309204 core_padconf_array_essential 0x40309264 wkup_padconf_array_essential 0x40309270 wkup_padconf_array_essential_4460 0x40309274 core_padconf_array_non_essential 0x40309540 wkup_padconf_array_non_essential 0x40309588 wkup_padconf_array_non_essential_4430 Will you be able to look into these? Thanks, Aneesh [1] Sourcery G++ Lite 2010q1-202 arm-none-linux-gnueabi-gcc (Sourcery G++ Lite 2010q1-202) 4.4.1 GNU ld (Sourcery G++ Lite 2010q1-202) - binutils 2.19.51.20090709 [2] Linaro 4.6-2012.01 arm-linux-gnueabi-gcc (crosstool-NG linaro-1.13.1-2012.01-20120125 - Linaro GCC 2012.01) 4.6.3 20120105 (prerelease) GNU ld (crosstool-NG linaro-1.13.1-2012.01-20120125 - Linaro GCC 2012.01) 2.22

13 years, 9 months

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[ACTIVITY] w08

by Asa Sandahl

Hi! * Development benchmarks: Focused on the implementation of development benchmarks in the cbuild system. Discussed with Michael about how the comments should look. I am now testing my solution in the launchpad staging area. You can see a link to an example of a benchmark result comment below. (Should not be a double comment of course, and the actual result files are only stored on my machine for now.) https://code.staging.launchpad.net/~ramana/gcc-linaro/partial_partial_pre_t… The real benchmark names are not mentioned, since that might be sensitive. * Bug reports I got an action on Monday's meeting to investigate if https://bugs.launchpad.net/ubuntu/+source/gcc-4.6/+bug/926855 is the same as PR52294. Investigated with help from Ramana and updated the ticket. Regards Åsa

13 years, 9 months

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[ACTIVITY] report week 08

by Peter Maydell

Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-??-?? || || (new blueprints & reestimate for this one pending Michael H's writeup/etc) Historical Milestones: ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| 2012-02-01 || == cp15-rework == * figuring out how various suggestions/conversations on this from Connect ought to fit together == other == * LP:928580 recent u-boot not booting on QEMU beagle: tracked this down to a u-boot bug and passed to John Rigby * investigated a linux-user segfault deadlock which turns out to be because the guest program is using setrlimit to restrict memory usage and one of qemu's internal memory allocations then fails. Not clear how best to fix but was able to nack the suggested patch... * most of the patches for passing a device tree to the kernel from qemu (via -dtb option) are now upstream; rebased the final patch which should now go in soon I think * LP885239 qemu-linaro broke booting of zaurus models: fixed a bug where a trustzone support patch had broken some cp15 registers for xscale cpus * minor patch: fixed formatting of list of supported machines help text * fix an embarrassing segfault bug in a patch of mine committed last week * it turns out that we can detect at compile time whether glibc's makecontext() is an always-fails stub : sent configure patch to do this * travel mostly set up for connect Q2.12 * lots of meetings/training: toolchain call; standup; 1-2-1; project management training; comms meeting

13 years, 9 months

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Cortex-A8 benchmark machine

by Michael Hope

I've added a Cortex-A8 benchmark machine to my home office. The machine is called 'nova1' and is part of the cbuild a8-ref queue. Feel free to give it jobs: http://ex.seabright.co.nz/helpers/scheduler/spawn -- Michael

13 years, 9 months

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[ACTIVITY] Feb 13 - Feb 17

by Thiago Jung Bauermann

Hi, GDB on Android exploration: * Familiarizing myself with the Android SDK and NDK, and the Android runtime environment. * Set up a Linaro Android Versatile Express image running on Linaro qemu. Updated the wiki page [1] with instructions on how to prepare its initrd to make it palatable to qemu. * Trying to figure out if there's a way to get the SDK and NDK to talk to that image. * Studied AOSP's patches to gdbserver, and also Mozilla's patches to AOSP's GDB and gdbserver. -- []'s Thiago Jung Bauermann Linaro Toolchain Working Group [1] https://wiki.linaro.org/PeterMaydell/QemuVersatileExpress

13 years, 9 months

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Bounce host changes

by Michael Hope

I've changed the bounce host used to gain access to the boards at my home office. The ports and configuration are the same but you will get a scary error due to the SSH host key changing. Let me know if there are any problems, -- Michael

13 years, 9 months

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Agenda for tomorrow's performance call.

by Ramana Radhakrishnan

Hi , This is now at : https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-02-07 Please add any topics that need to be added in the wiki page. Thanks, Ramana

13 years, 9 months

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[ACTIVITY] 13th - 19th February

by Andrew Stubbs

* Linaro GCC Discovered that part of my conditional execution problems were caused by some over-zealous peephole optimizations adding CC register clobbers to arithmetic operations in order to take advantage of the 16-bit encoding. This is a problem because they can't be converted to conditional execution so freely because overwriting the CC register prevents any further conditional execution (and forces a 32-bit encoding unnecessarily). I wrote a patch to help ifcvt unpick all this and DTRT, and posted it upstream. It turns out that Benrd (I think) already reimplemented the peephole optimization in the reorg pass, so all that is really needed is to delete the now obsolete peepholes. Richard E has approved the revised patch. Unfortunately I've now discovered that that exposed a bug in the machine description, so that'll have to be fixed also. Tried to update the gcc-linaro/4.7 branch, but found the build broken. In fact, Matthias had already reported it to Bugzilla. I did a binary search, identified the problem commit, posted the info to bugzilla, and pushed a merge request for the last working commit for testing. This tested ok, so I've merged it to the Linaro 4.7 trunk. Brought the Linaro GCC patch tracker up to date to aid identification of patches we will need to forward port to 4.7. The remaining 'red' patches are either not committed upstream, or I wasn't sure. Attempted to benchmark the 64-bit shift improvements, but the target board (ursa1) has developed an I/O error. * Other Joe Seymour and I went to HP Bristol to attend one of their science lectures. Professor Jim Al-Khalili gave a talk about the recent "faster-than-light" neutrinos experiments, and explained why it can't possibly be true. http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html

13 years, 9 months

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[ACTIVITY] Week 07

by Zhenqiang Chen

Summary: * crosstool-ng patches for linaro 2012.02 binary toolchain release Details: 1. Revise the gdb lsb build patches based on gdb-7.4. 2. Clean up old patches and only keep the latest version, since we only keep the latest version in config for linaro. 3. Window installer patch. * Scripts to use installjammer to create the win32 install package. * Apply linaro logo to the install package. * Sync up the install directory and Start-menu layout with embedded toolchain. * Test the package on win7. Plans: * Finalize 2012.02 binary toolchain release. Best regards! -Zhenqiang

13 years, 9 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, libunwind * discussions about local unwinding on Android * problem: dl_iterate_phdr isn't available * idea: parse proc/<pid>/maps but to find the ELF file for a given IP and get to the ARM specific unwind info from there * assisted an Android game developer who is using clang to compile the native parts of the app, the ndk to link it and wondered why the debuggerd doesn't catch any crashes OpenEmbedded * mainly worked on the linaro meta layer * got the external binary toolchain recipe working * added the Linaro 3.1 Kernel to the layer * updated documentation: https://wiki.linaro.org/KenWerner/Sandbox/OpenEmbedded-Core Regards, Ken

13 years, 9 months

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[ACTIVITY] report week 07

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-02-20 || || (for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM) Historical Milestones: ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| 2012-02-01 || == other == * post-Connect miscellany: * got boot-wrapper into an official location in linaro git repo * Exynos4 patchset finally made it through a review and is upstream * vexpress-a15 model also now upstream * put together arm-devs pullreq and got it committed * LP:932856 : fix broken omap3 bootrom emulation of raw boot mode * LP:931940 : fix failure to raise interrupts in PL031 realtime clock model * reviewed some qemu gdbstub patches that should fix a problem with semihosting-via-gdb * rebased qemu-linaro: another nasty one after upstream QOM patches landing * spent some time finishing up cleanup of the omap_i2c patches in qemu-linaro (a job started and left unfinished a few months back)

13 years, 9 months

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[ACTIVITY] Feb 14 - Feb 17

by Ulrich Weigand

== GCC == * Verified status of patches in Linaro 4.6 that might not yet be in mainline / Linaro 4.7. Ported two of Ira's vectorizer patches and created merge request. * Successfully tested and benchmarked 4.7 version of Richard's sched-pressure patch, with similar results as seen on 4.6. Rebased branch due to conflicts with recent mainline merge; will commit after retesting. * Investigated LP #923397 (Broken alignment attribute). Now fixed in FSF mainline and 4.6 branch, will get merged into Linaro GCC 4.6 automatically for next release. * Ongoing work on a patch to allow memory operands with vec_set and vec_extract to avoid excessive vmov generation in the PR 51819 test case. * Started working on a patch to generate usat/ssat instructions where appropriate. 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

13 years, 9 months

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Status of Linaro GCC 4.7 patches

by Ulrich Weigand

Hi Andrew, thanks for bringing the 4.6 patch tracker up to date. I've had a look over everything that's marked red to see what we need to do to bring Linaro 4.7 up to date: 106869 Add -fsched-pressure-algorithm=model and enable it by default on ARM. My recent commit of Richard's patch. I've tested a forward-port to the Linaro 4.7 branch already, but had to rebase it due to merge conflicts with the recent upstream merge, so I'll commit after retesting: lp:~uweigand/gcc-linaro/sched-pressure-v2-4.7 106846 Handle non-constants in mixed size condition 106844 Support pattern detection for basic blocks. Two of Ira's patches that have not yet landed upstream due to stage 3. I've created a forward-port branch and will merge into Linaro 4.7: lp:~uweigand/gcc-linaro/vect-patches-4.7 106789 Fix rs6000 vector expansion. 106768 Merge fix for lp721513. These are actually already upstream (modulo minor cosmetic changes) and present in Linaro 4.7. All in all, once the two branches mentioned above are merged, Linaro 4.7 will have everything that's today in Linaro 4.6. 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 Vorsitzende des Aufsichtsrats: Martina Koederitz | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 9 months

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[ACTIVITY] w07

by Asa Sandahl

Hi! * Finished gcc-4.7 benchmarking: https://wiki.linaro.org/Internal/ToolChain/Benchmarks/gcc-4.7_benchmarking Results uploaded to lp:~linaro-toolchain-wg/linaro-toolchain-benchmarks/private-runs * Development benchmarks: Continued the work started at connect. Got stuck for a while with a problem with the launchpad staging area. I could no longer log in. Seems the staging area is reset at weekends. The user credentials has to be given again, but you first have to remove them manually from the GNOME keyring (or whatever place they are stored). * Bug triaging: Triaged these bugs: https://launchpad.net/bugs/926855, https://launchpad.net/bugs/925991, https://launchpad.net/bugs/924726. Regards Åsa

13 years, 9 months

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