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Date: Thu, 06 Nov 2003 22:47:00 -0000
From: "J. Johnston" <jjohnstn@redhat.com>
Organization: Red Hat Inc.
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To: Andrew Cagney <ac131313@redhat.com>
Cc: Daniel Jacobowitz <drow@mvista.com>,
	Kevin Buettner <kevinb@redhat.com>,
	Marcel Moolenaar <marcel@xcllnt.net>, gdb-patches@sources.redhat.com
Subject: Re: [patch/rfc] Add child_to_xfer_partial; Was: ia64 portion of libunwind
 patch
References: <3F986E31.8050201@redhat.com> <1031024175718.ZM3475@localhost.localdomain> <3F996D88.9060505@redhat.com> <1031024185625.ZM9827@localhost.localdomain> <3F9F0180.2010702@redhat.com> <20031029012833.GA11070@nevyn.them.org> <3FA043B2.6090401@redhat.com> <3FA7F97B.4090909@redhat.com> <3FAACBE3.3060104@redhat.com>
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Andrew Cagney wrote:
> Jeff,
> 
> This adds a child_xfer_partial method to "inftarg.c".  I've included a 
> hook vis:
> 
>> +#if 0
>> +    case TARGET_OBJECT_UNWIND_TABLE:
>> +#ifndef NATIVE_XFER_UNWIND_TABLE
>> +#define 
>> NATIVE_XFER_UNWIND_TABLE(OPS,OBJECT,ANNEX,WRITEBUF,READBUF,OFFSET,LEN) 
>> (-1)
>> +#endif
>> +      return NATIVE_XFER_UNWIND_TABLE (ops, object, annex, writebuf,
>> +                                      readbuf, offset, len);
>> +#endif
> 
> 
> so that, in theory, all you need do is define that in the linux specific 
> nm-*.h file.
> 
> I think this will make plugging in additional xfer methods easier.  How 
> does it look?
> 

I like it because it means I only have to provide the particular functionality 
instead of overriding the whole function which could be dangerous if other 
changes were made to the default_xfer_partial routine.

> Anyone else?
> Andrew
> 
> PS: You'll notice that it also contains lurking code to add support for 
> an auxv transfer.
> 
> PPS: Note that I need to better test it.