You don't have to change your toolchain. It just makes it more likely that you'll be able to find support because the codesourcery toolchain is more commonly used. That being said, have you tried building with the compiler/libs provided with Android? If so, what problems are you having?
-Tony On Sun, Jun 3, 2012 at 3:20 PM, Ira Ray Jenkins <irarayjenk...@gmail.com>wrote: > Well, that's slightly frustrating to have to use a separate toolchain > than the one distributed with AOSP, but in any case I will attempt it > this way. Which version do I need to download?Codebench Arm Lite > Edition EABI or Codebench Arm Lite Edition GNU/Linux? > > I would eventually like to be able to build custom kernels for gem5, > specifically with Android ICS. I know Anthony is working on this, but > the process shouldn't be too much different than whatever process was > used to get the currently distributed kernel/image. So, I'm trying to > duplicate that process as a starting point. > > The end goal is to use the same kernel/disk images on qemu and gem5, > and use qemu to "fastforward" gem5. > > On Sun, Jun 3, 2012 at 9:11 AM, Anirudh Sivaraman <sk.anir...@gmail.com> > wrote: > > On Sat, Jun 2, 2012 at 8:40 PM, Ira Ray Jenkins <irarayjenk...@gmail.com> > wrote: > >> On Sat, Jun 2, 2012 at 7:54 PM, Anirudh Sivaraman <sk.anir...@gmail.com> > wrote: > >>> This thread may be useful : > >>> > http://m5sim.org/cgi-bin/mailman/private/gem5-users/2012-June/019665.html > >>> since I had a similar problem today morning. I used 2.6.35 and after > >>> the fixes in that thread it worked. > >>> > >>> On Sat, Jun 2, 2012 at 7:30 PM, Ira Ray Jenkins < > irarayjenk...@gmail.com> wrote: > >>>> I am attempting to duplicate the android kernel provided with gem5. > >>>> > >>>> Following the instructions here: > >>>> http://www.linux-arm.org/LinuxKernel/LinuxAndroidPlatform > >>>> > >>>> I cloned the repo: git clone git:// > linux-arm.org/linux-2.6-armdroid.git > >>>> > >>>> and checkout'd 2.6.38-armdroid with: git checkout -b 2.6.38-armdroid > >>>> > >>>> From here I copied the .config file supplied by gem5 into the kernel > >>>> tree root and compiled with the following: > >>>> > >>>> make -j9 ARCH=arm CROSS_COMPILE=arm-linux-androideabi- > >>>> > >>>> I had to modify fs/nfs/nfsroot.c, but the compilation completed > >>>> successfully using the toolchain supplied by the AOSP. I copied the > >>>> vmlinux over to the gem5/system/binaries directory, but gem5 stalls > >>>> for some reason when run with this kernel. > >>>> > >>>> The command line output: > >>>> gem5 Simulator System. http://gem5.org > >>>> gem5 is copyrighted software; use the --copyright option for details. > >>>> > >>>> gem5 compiled Apr 26 2012 12:26:52 > >>>> gem5 started Jun 2 2012 19:17:17 > >>>> gem5 executing on Gaia > >>>> command line: build/ARM/gem5.fast configs/example/fs.py -b ArmAndroid > >>>> --kernel=test.vmlinux > >>>> Global frequency set at 1000000000000 ticks per second > >>>> info: kernel located at: /home/ray/gem5/system/binaries/test.vmlinux > >>>> Listening for system connection on port 5900 > >>>> Listening for system connection on port 3456 > >>>> 0: system.remote_gdb.listener: listening for remote gdb on port 7000 > >>>> info: Using bootloader at address 0x80000000 > >>>> **** REAL SIMULATION **** > >>>> info: Entering event queue @ 0. Starting simulation... > >>>> warn: The clidr register always reports 0 caches. > >>>> warn: clidr LoUIS field of 0b001 to match current ARM implementations. > >>>> warn: The csselr register isn't implemented. > >>>> *stalls here* > >>>> > >>>> The terminal output: > >>>> ==== m5 slave terminal: Terminal 0 ==== > >>>> <5>Linux version 2.6.35.8-armdroid1+ (ray@Gaia) (gcc version 4.4.3 > >>>> (GCC) ) #1 SMP Sat Jun 2 19:07:52 EDT 2012 > >>>> CPU: ARMv7 Processor [350fc000] revision 0 (ARMv(null)), cr=10c5387f > >>>> CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache > >>>> Machine: ARM-RealView PBX > >>>> <4>Ignoring unrecognised tag 0x00000000 > >>>> Memory policy: ECC disabled, Data cache writealloc > >>>> *stalls here* > >>>> > >>>> My assumption is that I've missed a step, or incorrectly configured > >>>> something. Thanks for the help, > >>>> _______________________________________________ > >>>> gem5-users mailing list > >>>> gem5-users@gem5.org > >>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > >>> _______________________________________________ > >>> gem5-users mailing list > >>> gem5-users@gem5.org > >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > >> > >> > >> > >> I realized an error in my original question. Once I cloned the source, > >> I did a checkout -b ( which creates a new branch); however, I was > >> still on linux-2.6.35-armdroid. > >> > >> Beyond that, I didn't modify the provided .config at all, just copied > >> it over. Should I do make oldconfig, in which case, what options > >> should I select? Like I said, I just want to duplicate the process > >> used to create the default/provided kernel. > > > > You don't need to select any options or do make oldconfig. You can > > just copy the given config file onto .config and it should work. > > > > 1. Couple of things : Your cross-compiler tool chain is different from > > the suggested one. Download it from here : > > http://www.mentor.com/embedded-software/codesourcery. You should be > > using arm-none-linux-gnueabi- > > 2. You also need to add EXTRA_CFLAGS=-mno-unaligned-access because it > > causes a kernel exception otherwise. So your make command will change > > to : > > > > make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- > > EXTRA_CFLAGS=-mno-unaligned-access -j<WhateverYouWant> > > > > After this it should work. You don't need to do any config. on your > > own or add new config options. If I may ask, why are you trying to > > compile the kernel ? I have been trying to do the same as well, so it > > might help if we avoided duplication. > > > > Anirudh > > > > > > > >> _______________________________________________ > >> gem5-users mailing list > >> gem5-users@gem5.org > >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > _______________________________________________ > > gem5-users mailing list > > gem5-users@gem5.org > > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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