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Re: m68k-elf, flat format, reloc tables, binutils 2.16, gcc 4.1.1
- From: Andreas Schwab <schwab at suse dot de>
- To: "Jate Sujjavanich" <jsujjavanich at syntech-fuelmaster dot com>
- Cc: <binutils at sourceware dot org>
- Date: Tue, 07 Aug 2007 15:47:35 +0200
- Subject: Re: m68k-elf, flat format, reloc tables, binutils 2.16, gcc 4.1.1
- References: <EC5EE493B6046F45A2DDEC4A828DE52E021DD15F@EXCHSRVR.syntech.org>
"Jate Sujjavanich" <jsujjavanich@syntech-fuelmaster.com> writes:
> [.rela.data]
> Offset Info Type Sym.Value Sym. Name + Addend
> 00001e50 0007b301 R_68K_32 000010fc _string_syserrmsgs + 0
> 0000213e 00000301 R_68K_32 00000000 .data + 2f9f
>
> My understanding is as follows. The relocation table for .rela.data is a
> list of pointers in the data section which must be updated for relocated
> code.
Type, sym value and sym name are derived fields. The relocation entry
only contains offset, info and addend, where info encodes the type and
the symbol index. Sym value is just the value of the symbol as recorded
in the symbol table. The item to relocate is addressed by the offset
into the section, the value is computed according to the type (as
defined by the psABI). For R_68K_32 the value is the (relocated) symbol
value plus the addend, to be stored in the 32 bit field at the offset.
> Also, does anyone have suggestions to make more sense of the symbol
> name ".data"?
It's the section symbol.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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