linaro-toolchain

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by Beni

First I am trying to learn and am in no way an expert. I have searched and searched for a walkthrough on how to compile LKMs for my pandaboard ES. My target is the pandaboard running Linaro 12.08. I am using Linaro toolchain binary 12.08. My confusion comes from me not knowing where the kernel sources are (really how to get them) and the target libraries. I guess what I expect is the target's rootfs with kernel source to be somewhere on my Ubuntu Host so I can link to them. I have tried the following make file configs. But obviously, I don't have the correct path for KERNDIR as I don't know if it even exists on my host. And the second make file seems like a native compile. My previous experience with buildroot: KERNDIR=/opt/buildroot/build_arm/linux-2.6.20.7/ export CROSS_COMPILE=arm-linux- export ARCH=arm obj-m += pwr_led.o all: make -C $(KERNDIR) M=$(PWD) modules clean: make -C $(KERNDIR) M=$(PWD) clean Web examples: obj-m = foo.o KVERSION = $(shell uname -r) all: make -C /lib/modules/$(KVERSION)/build M=$(PWD) modules clean: make -C /lib/modules/$(KVERSION)/build M=$(PWD) clean Could you please set my head straight by pointing me to a webpage or briefly walking through the steps? Thanks, Todd

12 years, 10 months

Re: [Linaro-toolchain-dev] Linaro tool chain manuals

by Matthew Gretton-Dann

Assaf, Just to let you know that linaro-toolchain-dev(a)lists.launchpad.net is a closed list, a better place for this question is linaro-toolchain(a)lists.linaro.org. On 3 September 2012 11:41, Assaf Hoffman <hoffman(a)marvell.com> wrote: > Hi, > > Where can I find Linaro toolchain manuals? The manuals are distributed as *.info files, as per FSF GCC. These are found in .../share/info/ under wherever you installed your toolchain. One way to view these is to run info as follows: info -f .../share/info/gcc.info > I’m looking for Linaro supported optimization flag list. > > Is it a super set of FSF GCC? Linaro GCC 4.X supports all the options of FSF GCC 4.X, it may also support options that were added in later versions of FSF GCC if the appropriate functionality has been backported. The info files will document these new options. Unfortunately, I do not have an easy to read list of these options (if indeed there are any), so I can't provide you with any further pointers at the moment. Thanks, Matt -- Matthew Gretton-Dann Linaro Toolchain Working Group matthew.gretton-dann(a)linaro.org

12 years, 10 months

[Activity] Week 35

by Zhenqiang Chen

Summary: * Release Linaro binary toolchain 2012.08 * Start shrink-wrap task Details: 1. Validate and release Linaro binary toolchain 2012.08. 2. Start shrink-wrap task https://launchpad.net/gcc-linaro/+spec/shrink-wrapping: * Learn the background from the mail-list discussion: http://old.nabble.com/Shrink-wrapping%3A-Introduction-to31220423.html * Build X86/MIPS trunk toolchain to check the changes. * Try to apply ARM backend related patches. It can get correct result for several small cases. But lots of new fails in gcc make-check. "pop_multiple_with_writeback_and_return" is not handled correctly. Plans: * Continue the shrink-warp work. Best regards! -Zhenqiang

12 years, 10 months

[ACTIVITY] report week 35

by Peter Maydell

(Short week: 4 days, bank holiday) Current Milestones: || || Planned || Estimate || Actual || || clean up kvm-qemu cp i/f || 2012-09-20 || 2012-09-20 || || || fake-trustzone || 2012-10-15 || 2012-10-15 || || Also planned: general keeping up with kernel changes; upstream patch review; qemu-linaro releases. May change dates to align with overall KVM plan for the quarter when that is finalised. Previous Milestones: ||cp15-rework || 2012-01-06 || 2012-06-23 || 2012-06-24 || ||a15-lpae-support || 2012-07-13 || 2012-07-20 || 2012-07-20 || == track-kvm-abi-changes == * working through design of how we do sync of register state between QEMU and the kernel and how we handle migration (the two turn out to be related and I now have a nice looking design that resolves both of these at once) * both the interrupt injection ABI and the coprocessor access ABI are changing (again!) == other == * fixed an embarrassing bug which made qemu-system-arm segfault on 32 bit hosts; luckily spotted just in time for QEMU 1.2 release * AFDS (annual review) season again KVM blueprint progress tracker: http://ex.seabright.co.nz/helpers/backlog?group_by=topic&colour_by=state&pr… -- PMM

12 years, 10 months

[ACTIVITY] Week of 27 - 31 August

by Matthew Gretton-Dann

== Progress == * Bank Holiday on Monday * Got symbol_ref split benchmarking going * Hot/Cold partitioning in PGO: * https://blueprints.launchpad.net/gcc-linaro/+spec/hot-cold-partitioning-in-… * Investigated and fixed all compile-time failures in SPEC * Investigated and fixed a silent code-gen fault in SPEC == Next Week == * Look at symbol_ref split benchmarking results * Hot/Cold Partitioning: * Investigate remaining silent code-gen faults and non-termination issue in SPEC * If failures are fixed start profiledbootstraps and tests on the central boards. == Future == * Look at Cards for Vectorization, PGO and LTO with Michael. -- Matthew Gretton-Dann Linaro Toolchain Working Group matthew.gretton-dann(a)linaro.org

12 years, 10 months

[ACTIVITY] Aug 27-Aug 31

by Christophe Lyon

== Progress == * Validation of my vext patch in big-endian mode proved that proper support would be non-trivial. Spent a lot of time writing a self-testing executable test, which works in both big and little endian modes. Posted an updated patch which makes no optimization in big-endian. After discussion with Ramana, I will post a 2nd patch which improves the testing in big-endian mode. * In the process, wrote a patch to fix 3 other testcases which used to fail in big-endian mode. * Received no answer from the original contributor of bswap16 support patch. == Next == * Have my vext patch accepted on trunk. * Continue with bswap16 support.

12 years, 10 months

[ACTIVITY] report week 34

by Peter Maydell

(Short week: 3 days) Current Milestones: || || Planned || Estimate || Actual || || clean up kvm-qemu cp i/f || 2012-09-20 || 2012-09-20 || || || fake-trustzone || 2012-10-15 || 2012-10-15 || || Also planned: general keeping up with kernel changes; upstream patch review; qemu-linaro releases. May change dates to align with overall KVM plan for the quarter when that is finalised. Previous Milestones: ||cp15-rework || 2012-01-06 || 2012-06-23 || 2012-06-24 || ||a15-lpae-support || 2012-07-13 || 2012-07-20 || 2012-07-20 || == clean-up-kvm-patches == * patches as they stand look good; currently blocked waiting for changes to go into kernel side == track-kvm-abi-changes == * thinking about some interesting corner cases in accessing cp15 state via KVM, notably how userspace should get at the cache ID registers, which are exposed by hardware as a "select" and "read value of selected register" cp15 register pair. Consensus seems to be that the kernel should deal with converting this into a simple interface that userspace can use to just read all the ID register state at once. == other == * fixed breakage in ARM TCG host support (recent changes had failed to account for the ABI requirement that 64 bit arguments to functions must be passed in even-odd register pairs) * KVM bootwrapper: pushed 64-bit-addresses-in-dtb patch to main repo; reviewed patch from Guodong Xu adding uInitrd support KVM blueprint progress tracker: http://apus.seabright.co.nz/helpers/backlog?group_by=topic&colour_by=state&… -- PMM

12 years, 10 months

[ANNOUNCE] Linaro Toolchain Binaries 2012.08 released

by Zhenqiang Chen

The Linaro Toolchain Working Group is pleased to announce the 2012.08 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 4.7 2012.08 * Linaro GDB 7.4 2012.06 * 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: * Enable threaded gold linker in Linux package 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/2012.08 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.

12 years, 10 months

[Activity] Week 34

by Zhenqiang Chen

Summary: * Identify the root cause of performance regression for the "split2" patch. * Validate Linaro binary toolchain prerelease. Details: 1. Identify the root cause of performance regression for the "split2" patch. * Code alignment is the root cause for the performance regression (Michael reproduced it with "__attribute__ ((aligned(16)))"). * "build-id" section is the root cause of result difference from cbuild test (the additional section makes the function address different). * Workout a small case to show the impact of code alignment on performance. 2. Linaro binary toolchain 2012.08 prerelease validation. All tests pass. Absence: * Annual leave: Aug. 24. Plans: * Linaro binary toolchain 2012.08 release. * Start shink-wrap work. Best regards! -Zhenqiang

12 years, 10 months

LTO for the kernel

by Christian Robottom Reis

In case nobody here caught it: https://lwn.net/Articles/512548/ Interesting? Worth talking to Andi about it for ARM? -- Christian Robottom Reis | [+55 16] 3376 0125 | http://async.com.br/~kiko Async Open Source | [+55 16] 9112 6430 | http://launchpad.net/~kiko

12 years, 10 months

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