* "unhandled relocation type 18" ???
@ 2001-03-05 19:09 Wolfgang Denk
2001-03-06 7:25 ` Geert Uytterhoeven
0 siblings, 1 reply; 6+ messages in thread
From: Wolfgang Denk @ 2001-03-05 19:09 UTC (permalink / raw)
To: linuxppc-dev
Hi,
when trying to "insmod" a kernel module that uses floating-point
functions like "sin", we get error messages:
unhandled relocation type 18
This is on a MPC8xx CPU with kernel 2.4.x, modutils-2.4.1; the module
and all code linked with it was compiled with "-msoft-float".
[Before you ask why we are doing something like that: it's for RTAI.]
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx•de
Why is an average signature file longer than an average Perl script??
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: "unhandled relocation type 18" ???
2001-03-05 19:09 "unhandled relocation type 18" ??? Wolfgang Denk
@ 2001-03-06 7:25 ` Geert Uytterhoeven
2001-03-06 8:02 ` Wolfgang Denk
0 siblings, 1 reply; 6+ messages in thread
From: Geert Uytterhoeven @ 2001-03-06 7:25 UTC (permalink / raw)
To: Wolfgang Denk; +Cc: linuxppc-dev
On Mon, 5 Mar 2001, Wolfgang Denk wrote:
> when trying to "insmod" a kernel module that uses floating-point
> functions like "sin", we get error messages:
>
> unhandled relocation type 18
>
> This is on a MPC8xx CPU with kernel 2.4.x, modutils-2.4.1; the module
> and all code linked with it was compiled with "-msoft-float".
Does it also complain about a missing symbol for `sin'?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k•org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: "unhandled relocation type 18" ???
2001-03-06 7:25 ` Geert Uytterhoeven
@ 2001-03-06 8:02 ` Wolfgang Denk
2001-03-06 10:22 ` Franz Sirl
0 siblings, 1 reply; 6+ messages in thread
From: Wolfgang Denk @ 2001-03-06 8:02 UTC (permalink / raw)
To: Geert Uytterhoeven; +Cc: linuxppc-dev
In message <Pine.LNX.4.05.10103060824030.29713-100000@callisto•of.borg> you wrote:
> On Mon, 5 Mar 2001, Wolfgang Denk wrote:
> > when trying to "insmod" a kernel module that uses floating-point
> > functions like "sin", we get error messages:
> >
> > unhandled relocation type 18
>
> Does it also complain about a missing symbol for `sin'?
No, it does not.
We made sure to link the module with the math library to resolve
those references.
But we still get those error messages; the first is always for
lshrdi3 - which is linked with our module (but also provided by the
kernel - could there be any problems?), and then we get a long list
of errors for pack and unpack functions - whatever they are.
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx•de
An Elephant is a mouse with an Operating System. - Knuth
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* Re: "unhandled relocation type 18" ???
2001-03-06 8:02 ` Wolfgang Denk
@ 2001-03-06 10:22 ` Franz Sirl
2001-03-06 11:49 ` Jerry Van Baren
2001-03-08 2:53 ` Dan Malek
0 siblings, 2 replies; 6+ messages in thread
From: Franz Sirl @ 2001-03-06 10:22 UTC (permalink / raw)
To: Wolfgang Denk; +Cc: Geert Uytterhoeven, linuxppc-dev
At 09:02 06.03.2001, Wolfgang Denk wrote:
>In message <Pine.LNX.4.05.10103060824030.29713-100000@callisto•of.borg>
>you wrote:
> > On Mon, 5 Mar 2001, Wolfgang Denk wrote:
> > > when trying to "insmod" a kernel module that uses floating-point
> > > functions like "sin", we get error messages:
> > >
> > > unhandled relocation type 18
> >
> > Does it also complain about a missing symbol for `sin'?
>
>No, it does not.
>
>We made sure to link the module with the math library to resolve
>those references.
>
>But we still get those error messages; the first is always for
>lshrdi3 - which is linked with our module (but also provided by the
>kernel - could there be any problems?), and then we get a long list
>of errors for pack and unpack functions - whatever they are.
18 is a PLTREL24 relocation, so a b/bl has to be involved, but it should be
a REL24 relocation, the PLT usage points to compilation of a module with
-fpic/-fPIC?
Franz.
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* Re: "unhandled relocation type 18" ???
2001-03-06 10:22 ` Franz Sirl
@ 2001-03-06 11:49 ` Jerry Van Baren
2001-03-08 2:53 ` Dan Malek
1 sibling, 0 replies; 6+ messages in thread
From: Jerry Van Baren @ 2001-03-06 11:49 UTC (permalink / raw)
To: linuxppc-dev
At 11:22 AM 3/6/01 +0100, Franz Sirl wrote:
>At 09:02 06.03.2001, Wolfgang Denk wrote:
>
>>In message <Pine.LNX.4.05.10103060824030.29713-100000@callisto•of.borg>
>>you wrote:
>> > On Mon, 5 Mar 2001, Wolfgang Denk wrote:
>> > > when trying to "insmod"
>> a kernel module that uses floating-point
>> > > functions like "sin", we get error messages:
>> > >
>> > > unhandled relocation type 18
>> >
>> > Does it also complain about a missing symbol for `sin'?
>>
>>No, it does not.
>>
>>We made sure to link the module with the math library to resolve
>>those references.
>>
>>But we still get those error messages; the first is always for
>>lshrdi3 - which is linked with our module (but also provided by the
>>kernel - could there be any problems?), and then we get a long list
>>of errors for pack and unpack functions - whatever they are.
>
>18 is a PLTREL24 relocation, so a b/bl has to be involved, but it
>should be
>a REL24 relocation, the PLT usage points to compilation of a module with
>-fpic/-fPIC?
>
>Franz.
Ah-ha, these are good clues. This sounds to me like an unresolved
reference (most likely) or a branch too far. An unresolved reference
can cause the linker to try to make the branch go beyond the legal
limits (+/-32MBytes) or you may simply have too large a program for the
relative branches. I would suggest figuring out the lshrdi3, pack and
unpack errors first.
gvb
Disclaimer: This is speculation based on cruel past experience.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: "unhandled relocation type 18" ???
2001-03-06 10:22 ` Franz Sirl
2001-03-06 11:49 ` Jerry Van Baren
@ 2001-03-08 2:53 ` Dan Malek
1 sibling, 0 replies; 6+ messages in thread
From: Dan Malek @ 2001-03-08 2:53 UTC (permalink / raw)
To: Franz Sirl; +Cc: Wolfgang Denk, Geert Uytterhoeven, linuxppc-dev
Franz Sirl wrote:
> 18 is a PLTREL24 relocation, so a b/bl has to be involved, but it should be
> a REL24 relocation, the PLT usage points to compilation of a module with
> -fpic/-fPIC?
Heh, heh....it's probably looking for C library or compiler run-time
support (and virtual addresses to match :-).
-- Dan
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2001-03-05 19:09 "unhandled relocation type 18" ??? Wolfgang Denk
2001-03-06 7:25 ` Geert Uytterhoeven
2001-03-06 8:02 ` Wolfgang Denk
2001-03-06 10:22 ` Franz Sirl
2001-03-06 11:49 ` Jerry Van Baren
2001-03-08 2:53 ` Dan Malek
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