XRP Ninja

I got a laptop from my employer (Novell) nearly 3 months ago. I installed both Gentoo and SLED in it. I didn't setup fbsplash on it when I installed Gentoo. I tried it today. However, I found the progress bar in silent mode did not progress. It stayed at "Initializing kernel", 0%. Finally, I found the reason was that I didn't have "/lib/rc/plugins" directory and as a consequence splashutils openrc plugin splash.so can't be installed into this directory. And that's why the progress bar does not progress. I think maybe it is a bug in openrc. But I am not sure and I can't investigate it further today, it is already 3 pm. :( So I just left a note here. :)

1. git clone git://www.gentoo-cn.org/var/git/loongson.git 2. Don't include loongson overlay's directory directly in your PORTDIR_OVERLAY. But in your own overlay, like /usr/local/portage, create symlinks pointing to sys-devel/ and sys-libs/glibc in loongson overlay. This is because you may not want to install packages from loongson overlay in your host machine. Also you need to make sure your own overlay is the first overlay containing binutils/gcc/glibc in your PORTDIR_OVERLAYS list. You may check the value of this list using command: portageq envvar PORTDIR_OVERLAY 3. Then, just run crossdev -t mips64el-unknown-linux-gnu. This command installed the following components on my host machine: linux-headers-2.6.27-r2 from portage. binutils-2.19.1-r1 from loongson overlay. gcc-4.4.2 from portage. The gcc in loongson overlay currently is just a symlink to portage gcc. glibc-2.9_p2009042 from loongson overlay. However if you build the toolchain now, glibc-2.10.1 will be installed ins...

Update: as reported by Fai Wong, -O1 is actually fine. Obviously, it must be some flag(s) which is(are) enabled at -O2 but not at -O1 caused this problem. However, it is not a priority ATM. Anyone who is interested in it is welcome to investigate it further. As I have mentioned earlier , sqlite compiled with -O2 may cause xulrunner to segfault in N32 userland on Loongson. Well, I almost forget it. So to remove the -O2 from CFLAGS once and for all, I adopted the technique described here . zhangle@2f env $ pwd /etc/portage/env zhangle@2f env $ find . ./dev-db ./dev-db/sqlite ./O2-removal zhangle@2f env $ cat O2-removal pre_pkg_setup() { elog "bashrc is removing \"-O2\" from CFLAGS for $PN" CFLAGS="${CFLAGS/-O2/}" } zhangle@2f env $ ls -l dev-db/sqlite lrwxrwxrwx 1 zhangle zhangle 13 2009-08-01 16:10 dev-db/sqlite -> ../O2-removal

I just found that, it is actually very easy to trigger the problem that the -mfix-ls2f-kernel as option could fix. Like just emerging glibc could hang the system. So if you are using linux-loongson/2.6.30/stable branch from this git tree http://dev.lemote.com/git?p=rt4ls.git;a=summary, you maybe want to line 129 of arch/mips/Makefile: $(call cc-option,-march=loongson2f,-march=r4600) $(call cc-optoin,-mtune=loongson2f) to $(call cc-option,-march=loongson2f,-march=r4600) $(call as-option,-Wa$(comma)-mfix-ls2f-kernel,) Actually, $(call cc-optoin,-mtune=loongson2f) here is not required. BTW, glibc-2.10.1 is ready in my overlay. This version could solve the gdb issue: Error while reading shared library symbols: find_new_threads_callback: cannot get thread info: generic error find_new_threads_callback: cannot get thread info: generic error This happened previously when debugging multithread applications.

I have not blogged here for some time. But that does not necessarily mean I am slacking, ;). Instead I have been doing things. I should've blogged more. http://www.gentoo-cn.org/gitweb/?p=loongson.git;a=shortlog Redhatter posted two blogs related to Yeeloong's status. I guess I should say something too. First of all, I recommend this mailing list http://groups.google.com/group/loongson-dev to those who want to know the latest news about Loongson. If you want to try Gentoo on Yeeloong, you can take this http://www.gentoo-cn.org/~zhangle/loongson_mips3_n32_mplt_20081231.tar.bz2 The file's sha256sum is c94bcd45e58e5f4b8314942a6b3110a2316fd74adb009c8269d1e8e2077d7c72. Please note the userland is N32 ABI, meaning there may be more problems than in O32. But I should've already solved many of them for you. I have been working on Fuloong 2E/2F and Yeeloong's support, particularly N32 ABI system. Firefox is just one example. I have 3 Loongson machines, all donated by lemot...

It is working too. The xulrunner's ebuild is already in loongson overlay . For the mozilla-firefox ebuild, just use the one from mozilla overlay. If you experienced segfault, try to re-emerge sqlite with no optimization. Using the bundled sqlite surely is not an optimal solution, ;) One more thing: Xorg's siliconmotion driver is now working on yeeloong notebook : http://bugs.freedesktop.org/show_bug.cgi?id=21528

My quest for MIPS N32 firefox could finally come to an end, since I just got it scores the same as X86 firefox . Remember I said it would encounter bus error on a few websites in my last related post . But I didn't plan to look into this issue before dealing with cache aliasing problem. However, since Rayson Ho helped me to locate the exact cause of this issue, I decided to finish it first. The problem is caused by unaligned access of ldc1/sdc1 instruction. These two instructions' operand must be 8 bytes aligned. But when crashing, the operand is only 4 bytes aligned. After some discussion and experimenting, I found a workaround for sina.com.cn crashing problem. Yeah, a padding pointer sounds scary and fragile, but it did work. Before posting any comment to this, please make sure you have read all the emails in that thread. Then Fai Wong reported to me that it still crash in acid3 test . So I took another look. This time the problem happened in a different location, and it i...