Re: [parisc-linux] kernel updates.

Re: [parisc-linux] kernel updates.

[Cary Coutant]

>> > And the answer to this is:  
>> > - the only docs we have for 32 bit ELF from HP are quite old
>> > - if they're incomplete, it's up to us fill in the information
>> > - this is a good forum to ask directed questions on this topic
>> 
>> The question is: "is the documentation incomplete or wrong?".
>
>My understanding is that that documentations' always been incomplete, but
>not wrong.  Really the best person to talk to is Cary.  Cary?

The latest ELF supplement for PA-RISC is Version 1.5, dated August 20, 
1998. I'll send it separately to you, Alex, and you can post it on your 
web page (easier than getting HP's external web server updated). 

This document covers both 32-bit and 64-bit programs, but notes that ELF 
files are supported on HP-UX only for 64-bit programs. Nevertheless, a 
complete set of 32-bit relocations is listed in the document (and, yes, 
some 32-bit relocations have the same number and meaning, but different 
names, as 64-bit relocations).

The document also doesn't contain either Elf-32 or Elf-64 structure 
definitions. I have a separate document that describes Elf-64, but we 
defer to outside documentation for the Elf-32 format (e.g., the SVR4 gABI 
document).

If there are areas considered incomplete, please let me know. I'll do my 
best to answer questions here (first), and update the documents (as I 
have time).

-cary

Re: [parisc-linux] kernel updates.

[Ulrich Drepper]

Cary Coutant <cary@cup.hp.com> writes:

> This document covers both 32-bit and 64-bit programs, but notes that ELF 
> files are supported on HP-UX only for 64-bit programs. Nevertheless, a 
> complete set of 32-bit relocations is listed in the document (and, yes, 
> some 32-bit relocations have the same number and meaning, but different 
> names, as 64-bit relocations).

But this is a problem.  We might have to change the names then.  One
of the essential things about ELF is that it must be possible to have
support for all kind of architectures in one program.  So all the
definitions have to be able to peacefully coexist in one header file.

-- 
---------------.      drepper at gnu.org  ,-.   1325 Chesapeake Terrace
Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
Cygnus Solutions `--' drepper at cygnus.com   `------------------------

Re: [parisc-linux] kernel updates.

[Alex deVries]

On Mon, 19 Apr 1999, Cary Coutant wrote:
> 
> The latest ELF supplement for PA-RISC is Version 1.5, dated August 20, 
> 1998. I'll send it separately to you, Alex, and you can post it on your 
> web page (easier than getting HP's external web server updated). 

Oh, excellent, I hadn't known that those existed.

I've placed those at:
http://puffin.external.hp.com/docs/elf-64-gen.pdf 

and:
http://puffin.external.hp.com/docs/elf-pa-hp.pdf 

I'll include these references on the documentation pages as soon as
possible.


> The document also doesn't contain either Elf-32 or Elf-64 structure 
> definitions. I have a separate document that describes Elf-64, but we 
> defer to outside documentation for the Elf-32 format (e.g., the SVR4 gABI 
> document).

Could someone provide me with a reference to the SVR4 gABI document?

Thanks for your help, Cary.

- Alex

Re: [parisc-linux] kernel updates.

[Ulrich Drepper]

Alex deVries <adevries@redhat.com> writes:

> Could someone provide me with a reference to the SVR4 gABI document?

The most recent (though in draft form) is at

	http://www.sco.com/developer/gabi/contents.html

-- 
---------------.      drepper at gnu.org  ,-.   1325 Chesapeake Terrace
Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
Cygnus Solutions `--' drepper at cygnus.com   `------------------------

Re: [parisc-linux] kernel updates.

[Cary Coutant]

>But this is a problem.  We might have to change the names then.  One
>of the essential things about ELF is that it must be possible to have
>support for all kind of architectures in one program.  So all the
>definitions have to be able to peacefully coexist in one header file.

I don't believe there are any cases where the same name conflicts with 
two different numbers. We have cases where two names are used to refer to 
what is essentially the same relocation type, but that shouldn't be a 
conflict.

-cary

Re: [parisc-linux] kernel updates.

[Ulrich Drepper]

Cary Coutant <cary@cup.hp.com> writes:

> We have cases where two names are used to refer to what is
> essentially the same relocation type, but that shouldn't be a
> conflict.

This is no problem, right.

-- 
---------------.      drepper at gnu.org  ,-.   1325 Chesapeake Terrace
Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
Cygnus Solutions `--' drepper at cygnus.com   `------------------------

[parisc-linux] kernel updates.

[Alex deVries]

So, I spent some time this rainy Saturday on the kernel, and brought the
kernel a little closer to building.  There's now about 8 to 12 undefined
symbols still to fix, but make dep and make vmlinux now do two different
things.

There's a lot of stuff still to do in this, please, take the kernel tree
and try compiling it.  More importantly, help me fix it.

And ld.  We need ld help.

- Alex

-- 
Alex deVries <puffin@redhat.com>     
Red Hat Contrib Net maintainer          
Ottawa, Canada  
PA RISC Linux Porting Team

Re: [parisc-linux] kernel updates.

[Ulrich Drepper]

Alex deVries <adevries@redhat.com> writes:

> And ld.  We need ld help.

Well, this might be the right time to ask:

	I need the ELF specs which should be used.

This is for ld and glibc.

-- 
---------------.      drepper at gnu.org  ,-.   1325 Chesapeake Terrace
Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
Cygnus Solutions `--' drepper at cygnus.com   `------------------------

Re: [parisc-linux] kernel updates.

[Alex deVries]

On 17 Apr 1999, Ulrich Drepper wrote:
> Alex deVries <adevries@redhat.com> writes:
> > And ld.  We need ld help.
> 
> Well, this might be the right time to ask:
> 	I need the ELF specs which should be used.
> This is for ld and glibc.

And the answer to this is:  
- the only docs we have for 32 bit ELF from HP are quite old
- if they're incomplete, it's up to us fill in the information
- this is a good forum to ask directed questions on this topic

Which parts of the ELF spec are not contained in the existing HP document?

- Alex

-- 
Alex deVries <puffin@redhat.com>     
Red Hat Contrib Net maintainer          
Ottawa, Canada  
PA RISC Linux Porting Team

Re: [parisc-linux] kernel updates.

[Ulrich Drepper]

Alex deVries <adevries@redhat.com> writes:

> And the answer to this is:  
> - the only docs we have for 32 bit ELF from HP are quite old
> - if they're incomplete, it's up to us fill in the information
> - this is a good forum to ask directed questions on this topic

The question is: "is the documentation incomplete or wrong?".

My only comparison is elf.h header in HP/UX 11.  And this header
introduces completely different definitions for the same names.
Something which of course should be avoided under all circumstances.

I thin the first question to be answered is: which relocations must be
supported.  The answer has two parts: the minimal set and the complete
set.

I don't know the HPPA specifics, I only know ELF in general.

-- 
---------------.      drepper at gnu.org  ,-.   1325 Chesapeake Terrace
Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
Cygnus Solutions `--' drepper at cygnus.com   `------------------------

Re: [parisc-linux] kernel updates.

[Alex deVries]

On 18 Apr 1999, Ulrich Drepper wrote:
> Alex deVries <adevries@redhat.com> writes:
> > And the answer to this is:  
> > - the only docs we have for 32 bit ELF from HP are quite old
> > - if they're incomplete, it's up to us fill in the information
> > - this is a good forum to ask directed questions on this topic
> 
> The question is: "is the documentation incomplete or wrong?".

My understanding is that that documentations' always been incomplete, but
not wrong.  Really the best person to talk to is Cary.  Cary?

The documents in question are available at:

http://www.software.hp.com/STK/toc.html#Object

There's some other .h files that might be helpful as well.

- Alex

-- 
Alex deVries <puffin@redhat.com>     
Red Hat Contrib Net maintainer          
Ottawa, Canada  
PA RISC Linux Porting Team