Re: linux 2.6.18.2 with GCC 4.1.1 shell not coming

[m.pommerenke@xxxxxx]

Hi,

I had the same problem. We found out the gcc used an floating point
instruction FSTMX to push multible register onto the stack.
(on user space applications) This instruction ist not emulated by the
kernel floating point emulater.

I had configured the uclibc haveing a floating point processor. After
correcting this and rebuilding the gcc everything worked fine.


Martin Pommerenke





|-------------+--------------------------->
|             |                           |
|             | "satpal parmar"           |
|             | <parmarsatpal@xxxxxxxxx>  |
|             | Gesendet von:             |
|             | busybox-bounces@xxxxxxxxxx|
|             | t                         |
|             |                           |
|             |                           |
|             | 16.02.2007 11:48          |
|-------------+--------------------------->
  >-----------------------------------------------------------------------------------------------------------|
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  |                                                                                                           |
  | An:                                                                                                       |
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  |          linux-arm-kernel@xxxxxxxxxxxxxxxxxxxxxx, busybox@xxxxxxxxxxx, arm-gnu@xxxxxxxxxxxxxxxx           |
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  | Thema:                                                                                                    |
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  |          linux 2.6.18.2 with GCC 4.1.1 shell not coming                                                   |
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Hi all ;

 I am facing some  problem in porting linux kernel 2.6.18. I went through
some mailing list,archives and find mails refering exactly the problem I am
facing but unfortunetly I didnt get any working hints or solutions.I am
wondering if what I am facing is a known issue for embeded community. I
apprecaite if someone can  share hsi/her experinece on this isue.

Problem: We are porting linux-2.6.18.2 on ARM based chip, with
toochain-4.1.1(EABI), software floating point and uClibc-0.9.28.1.
We are using busybox-1.2.2.1 and ash shell.I am facing a certain problem in
init.c, before the shell comes up.

I have traced the problem and it seems to be that i don't recover from
the function console_init (in file init.c) .

Same kernel and rootfile system works fine when I compile with  with
gcc-4.0.3 toolchain (without EABI).So I cannot doubt UART interrupt, or
console driver.

following mail list similar problem without  any clues:

http://buildroot.uclibc.org/lists/buildroot/2007-February/001516.html

http://ozlabs.org/pipermail/linuxppc-embedded/2006-January/021541.html


here is my log;




Waiting for image to be downloaded via ICE...


Linux version 2.6.18.2 (sainin@xxxxxxxxxxxxxxxxxxxxxxxxxxxx ) (gcc version
4.1.1)


 #2 Fri Feb 16 15:44:48 IST 2007


CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0003177


Machine: Conexant Edwards-Based IRD


Memory policy: ECC disabled, Data cache writeback


CPU0: D VIVT write-back cache


CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets


CPU0: D cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets


Built 1 zonelists.  Total pages: 16384


Kernel command line: console=ttyRI0 root=/dev/ram  mem=64M debug=0


PID hash table entries: 512 (order: 9, 2048 bytes)


Console: colour dummy device 80x30


Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)


Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)


Memory: 64MB = 64MB total


Memory: 55040KB available (1112K code, 479K data, 68K init)


Mount-cache hash table entries: 512


CPU: Testing write buffer coherency: ok


checking if image is initramfs...it isn't (bad gzip magic numbers); looks
like a


n initrd


Freeing initrd memory: 8192K


NetWinder Floating Point Emulator V0.97 (double precision)


Initializing Cryptographic API


io scheduler noop registered (default)


ttyRI0 at MMIO 0xe0412000 (irq = 2) is a CNXTUART


ttyRI1 at MMIO 0xe0411000 (irq = 1) is a CNXTUART


ttyRI2 at MMIO 0xe0410000 (irq = 0) is a CNXTUART


RAMDISK driver initialized: 4 RAM disks of 8192K size 1024 blocksize


mice: PS/2 mouse device common for all mice


RAMDISK: ext2 filesystem found at block 0


RAMDISK: Loading 8092KiB [1 disk] into ram disk... done.


VFS: Mounted root (ext2 filesystem) readonly.


Freeing init memory: 68K


Hello WOrld inside init.c


before console_init


 (no shell)


Thanks for your patience and time.

Regards
satpal


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