Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

uclinux boot failed !!!

hi all, I am trying to boot uclinux kernel on 2s60es board, I am using build root. I have change memory map (ram and CF still remains same) and removed CF, perf monitor, sysid. While ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

--- Quote Start ---

originally posted by hippo@May 27 2006, 09:26 PM

busybox, .config for cross compile 

##  build options# 
config_static=y#  config_build_libbusybox is not set#  config_feature_full_libbusybox is not set#  config_feature_shared_busybox is not set
config_lfs=y
using_cross_compiler=y
cross_compiler_prefix="nios2-linux-uclibc-"
extra_cflags_options="-dfork=vfork -ddaemon=clone"#  config_build_at_once is not set
# #  installation options# #  config_install_no_usr is not set
config_install_applet_symlinks=y#  config_install_applet_hardlinks is not set#  config_install_applet_dont is not set
prefix="/home/hippo/rootfs"

i used this flags before, (but not now)

extra_cflags_options="-d__uclinux__ -dfork=vfork"

busybox, makefile add elf2flt flag 

busybox_unstripped: .depend $(libbusybox_soname) $(busybox_src) $(libraries-y)
    $(do_link) $(prog_cflags) $(prog_ldflags) $(cflags_combine) 
    -wl,-elf2flt="-s 16000" -wl,-v -wl,-d 
    -o $@ -wl,--start-group  
    $(applets_define) $(applet_src) 
    $(busybox_define) $(busybox_src) $(libraries-y) 
    $(ldbusybox) $(libraries) 
    -wl,--end-group
busybox: busybox_unstripped
    $(q)cp busybox_unstripped busybox#     $(do_strip)

there is an important issue about busybox. it takes more memory on mmu-less arch.

so i moved away from busybox a little. i use stand alone init, sash, and servers. i built others utils into busybox. see http://nioswiki.jot.com/wikihome/operating...nux/uclinuxdist (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux/uclinuxdist)

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15621)</div>

--- Quote End ---

hi hippo and all,

thanks for the help on busybox also, I did as you recommanded and its working fine.

At present size is not an issue for me but later I will try as you have done, building init, sh stand alone.

Next time I may bug you for building buildroot.

thanks for all your support.

Ankur