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Re: [PATCH] x86: adjust relocation overflow complaint types
- From: Andreas Schwab <schwab at suse dot de>
- To: Michael Matz <matz at suse dot de>
- Cc: Jan Beulich <JBeulich at novell dot com>, binutils at sources dot redhat dot com
- Date: Mon, 01 Aug 2005 11:30:20 +0200
- Subject: Re: [PATCH] x86: adjust relocation overflow complaint types
- References: <s2b126e7.064@lyle.provo.novell.com><Pine.LNX.4.58.0508011100130.20330@wotan.suse.de>
Michael Matz <matz@suse.de> writes:
> But linking will fail:
>
> % ./ld/ld-new -o mm -Ttext 0 -e bios_f000 mm.o
> mm.o: In function `bios_f000':
> : relocation truncated to fit: R_386_PC16 against symbol `bios_f000'
> defined in .text section in mm.o
>
> This is because bfd now thinks the jump is out of range.
Which is correct, in the context of 32 bit ELF.
> I don't know how to teach bfd to make a difference between .code16 and
> .code32 (or .code64 for that matter) in doing the overflow checking.
The linker only knows about the 32 bit ELF format. There is no relocation
that can represent a pc-relative relocation that wraps around in 16 bits.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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