Re: [PATCH][RFC] dump-core: PFN-GMFN table and ELF formatify (was Re: [Xen-devel] xc_get_pfn_list() creates broken core files)

[John Levon <levon@xxxxxxxxxxxxxxxxx>]

On Wed, Jan 17, 2007 at 02:54:51PM +0900, Isaku Yamahata wrote:

> Do you have any other correct value?
> e.g. ELFOSABI_NONE

NONE seems righter.

> I followed the way creating process core file and linux kernel dump file.
> Process core file and linux kernel dump file use only program headers.

But in both of those cases we have access to meaningful virtual address
maps, which isn't true here (or certainly not trivially true!)

> They use note section pointed by a program header to store register
> infomations and etc.
> Creating sections requires string table to store section name.
> It makes dump-core code more compilated.
> If using sections is appropreate for dump-core, such compilcations
> might be acceptable.
> However I don't see why section is more appropreate than program
> header because I don't expect to have so many kind of notes.
> At least for dump-core.

We want the same format for everything. And e.g. objcopy is designed for
manipulating sections (copying out contents of a section etc). Building
a .shstrstab isn't particularly difficult...

regards
john

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