Difference between revisions of "Gentoo embedded"

Revision as of 16:29, 6 September 2008

In order to get Embedded support somethings obviously need to be compiled. Now this is not yet going smoothly but I'll give some indication what can be done to fix it and where I am struggling.

Currently I have compiled a toolchain with gcc 4.3.1, uclibc-2008-09-06, a patch and patience. I am able to run code on the camera, if it is statically linked. Technically I could try to make a rootfs and see what happens. But currently I don't have the time to test that (and I don't want to break my cam before SoftwareFreedomDay.

Keep in mind that the 'native' cris memcpy.c is broken, I am positive I can get it into shape :) Please validate the code I write, I'm not an embedded professional :)

Output first tests

[1]

crisv32-axis-linux-uclibc-gcc --static -o /tmp/test2 /tmp/test2.c /mnt/dv/elphel/uClibc/lib/libpthread.a

[root@Elphel353 /mnt/flash/root/test]1157# ./test2 
Hello World from 0!
Hello World from 1!
Hello World from 2!
Hello World from 3!
Hello World from 4!

uclibc patch

--- libc/sysdeps/linux/cris/crti.S.orig 2008-09-06 23:51:14.017004350 +0200
+++ libc/sysdeps/linux/cris/crti.S      2008-09-06 23:54:28.477004350 +0200
@@ -10,8 +10,7 @@
        move    $srp,$r1
        subq    4,$sp
        move.d  $r0,[$sp]
-       move.d  $pc,$r0
-       sub.d   .:GOTOFF,$r0
+       lapc _GLOBAL_OFFSET_TABLE_,$r0
        .align  1
 
        .section        .fini
@@ -24,6 +23,5 @@
        move    $srp,$r1
        subq    4,$sp
        move.d  $r0,[$sp]
-       move.d  $pc,$r0
-       sub.d   .:GOTOFF,$r0
+       lapc _GLOBAL_OFFSET_TABLE_,$r0
       .align  1