From: Joshua Lamorie <jpl@xiphos•ca>
To: Wolfgang Grandegger <wolfgang.grandegger@bluewin•ch>
Cc: rtai@rtai•org, linuxppc-embedded@ozlabs•org
Subject: Re: Unhandled relocation of type 11
Date: Thu, 07 Apr 2005 10:20:56 -0400 [thread overview]
Message-ID: <425541C8.6060408@xiphos.ca> (raw)
In-Reply-To: <4254FB38.9040202@bluewin.ch>
Gidday there,
Thanks for the hint. However I can't see any reference to -fPIC in the
makefiles for ppcperflib. One thing I have discovered though is that
type 11 is defined in /usr/include/elf.h as R_PPC_ELF14. This error
happens twice, for __fixdfsi, and when I look for references to
__fixdfsi, I find that there are two calls to...
blt __fixdfsi
inside ppc_dtoui.S. Looking at the PPC Ref Guide, I see that blt is a
mnemonic for bc (branch conditional) and uses a relative offset of 14
bits. In the same function there is also a use of 'bl' (branch, long I
think) calling the same __fixdfsi. So I'm going to add a stupid line of
assembly to conditionally jump over the branch to __fixdfsi... I hope
that will work, but I haven't touched assembly since an 80286.
Joshua
Wolfgang Grandegger wrote:
>Hello,
>
>I'm not a linker expert but some time ago I got the gcc soft floating
>library working for 8xx and 4xx in kernel space. The problem was with
>PIC. Maybe your library is built with PIC and it's required without. You
>may want to have a look to:
>
> ftp://ftp.denx.de/pub/RTAI/contrib/fp_ppc_8xx.tar.bz2
>
>Wolfgang.
>
>
>On 04/06/2005 11:18 PM Joshua Lamorie wrote:
>
>
>>Please excuse this cross-post, but I think it is of interest to both
>>RTAI and Linux PPC folks.
>>
>>I am making a kernel module (an RTAI task) that needs floating point
>>support so I'm using IBMs perflib floating-point libraries (on a
>>Virtex-II Pro, aka ppc405).
>>
>>This is actually built from Matlab/simulink real-time workshop output (I
>>can't use rtai-lab because I don't think lxrt is available for ppc)...
>>so there end up being many object files to link.
>>
>>So, in the end I have a linker command as follows.
>>
>>powerpc-405-linux-gnu-ld -r -m elf32ppclinux -L/some/directories
>>matlab_root/rtw/c/libsrc/rt_zcfcn.o other.o inputs.o -o module_output.o
>>perflibs/fpopt/libppcfp.a
>>
>>Then I go to insert the module and....
>>/var/shm # insmod test001_build_rtmodule.o
>>Warning: loading test001_build_rtmodule.o will taint the kernel: non-GPL
>>license - Proprietary
>> See http://www.tux.org/lkml/#export-tainted for information about
>>tainted modules
>>test001_build_rtmodule.o: Unhandled relocation of type 11 for __fixdfsi
>>test001_build_rtmodule.o: Unhandled relocation of type 11 for __fixdfsi
>>
>>Hrmm... so any ideas on what type 11 is? I can see from the code in
>>modutils that this value is inside rel->r_info, such as R_PPC_ADDR32 or
>>R_PPC_ADDR16_HA.
>>
>>But where do I get more info about where r_info gets assigned? Do I
>>need to link libppcfp.a in a particular way?
>>
>>Any hints would be appreciated.
>>
>>Thanks in advance.
>>
>>Joshua
>>
>>
>>
--
Xiphos Technologies
(514) 848-9640 x227
(514) 848-9644 fax
www.xiplink.com
_______________________________________________
The information transmitted is intended only for the
person or entity to which it is addressed and may contain
confidential and/or privileged material. If you have
received this in error, please contact the sender and delete
this communication and any copy immediately. Thank you.
next prev parent reply other threads:[~2005-04-07 14:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-06 21:18 Unhandled relocation of type 11 Joshua Lamorie
2005-04-07 9:19 ` Wolfgang Grandegger
2005-04-07 14:20 ` Joshua Lamorie [this message]
2005-04-08 14:08 ` Joshua Lamorie
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=425541C8.6060408@xiphos.ca \
--to=jpl@xiphos$(echo .)ca \
--cc=linuxppc-embedded@ozlabs$(echo .)org \
--cc=rtai@rtai$(echo .)org \
--cc=wolfgang.grandegger@bluewin$(echo .)ch \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox