This is the mail archive of the cygwin mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Problem with using stripped cygwin1.dll built from CVS


On Fri, Jun 17, 2005 at 09:29:48AM -0500, Brian Ford wrote:
>On Wed, 8 Jun 2005, Christopher Faylor wrote:
>>On Wed, Jun 08, 2005 at 10:36:56AM -0400, Christopher Faylor wrote:
>>>I understand the problem.  It's a binutils bug that I'm investigating.
>>>Either gas or ld is marking NOLOAD sections as "read only" and that is
>>>causing windows to actually load them into memory.
>>
>>There's a new "test" version of binutils available which seems to fix
>>this problem.  I'm awaiting approval for a patch in the binutils
>>mailing list before making this version official.
>>
>>This turns out to have been a long-time bug in binutils, AFAICT.  The
>>debug sections that the GNU linker produces were not properly marked as
>>"noload" so debug data was actually loaded into memory.
>
>I wish I would have known this was possible while working on DWARF 2
>debugging.  Everything I read stated: "If it has a section header,
>Windows' brain dead loader will load it regardless of section
>attributes".  I hope it really works on all supported platforms.

It's a documented field in PE's section header, so I don't see why it
wouldn't work.  The only brain-dead thing that the loader does is to go
ahead and load a section into memory if it is marked as readable or
writable as well as noload.

>Do the RVA's for these sections still have to be consecutive?

As far as I can tell, yes.  Anything else seems to result in a
non-loadable binary.  But, I didn't investigate this too thoroughly so
it is possible that there's another binutils bug lurking there.

cgf

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]