[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Gcl-devel] Re: relocation overflow
From: |
Geoff Keating |
Subject: |
Re: [Gcl-devel] Re: relocation overflow |
Date: |
Thu, 21 Nov 2002 10:21:23 -0800 |
> Cc: Daniel Jacobowitz <address@hidden>, Alan Modra <address@hidden>,
> address@hidden, address@hidden
> From: Camm Maguire <address@hidden>
> Date: 20 Nov 2002 21:45:23 -0500
> Greetings, and thanks for your reply!
>
> Geoff Keating <address@hidden> writes:
>
> > Daniel Jacobowitz <address@hidden> writes:
> >
> > > On Wed, Nov 20, 2002 at 12:01:59PM -0500, Camm Maguire wrote:
> > > PowerPC GCC doesn't seem to have a long-calls option, so you're just
> > > out of luck if you can't fit things in 16MB. Trampolines may be the
> > > way to go.
> >
> > The way this is normally done, for programs that load arbitrary
> > modules, is that each module is a .so file, is built with -fpic, and
> > is loaded using the dlsym functions. Then the limit is 32Mb per
> > module, and you can have as many modules as your address space can
> > fit; cross-module calls happen through a PLT which can perform long
> > jumps.
>
> OK, when I first read this, I thought that -fPIC would eliminate 24bit
> relocs. I was mistaken, and have just verified that the reloc
> overflows are different, but still present, when adding -fPIC. On
> rereading this, it appears as though the dlym code has trampolines to
> handle long calls on 24bit relocs. Maybe I should look here.
Perhaps you are trying to load .o files, not .so files? There should
be no *24 relocs in a .so file if all its contents are built with
-fpic or -fPIC.
--
- Geoffrey Keating <address@hidden>
- [Gcl-devel] relocation overflow, Camm Maguire, 2002/11/19
- Message not available
- [Gcl-devel] Re: relocation overflow, Camm Maguire, 2002/11/20
- [Gcl-devel] Re: relocation overflow, Daniel Jacobowitz, 2002/11/20
- [Gcl-devel] Re: relocation overflow, Geoff Keating, 2002/11/20
- Re: [Gcl-devel] Re: relocation overflow, Camm Maguire, 2002/11/20
- Re: [Gcl-devel] Re: relocation overflow,
Geoff Keating <=
- Re: [Gcl-devel] Re: relocation overflow, Camm Maguire, 2002/11/21
- Re: [Gcl-devel] Re: relocation overflow, Daniel Jacobowitz, 2002/11/21
- Re: [Gcl-devel] Re: relocation overflow, Camm Maguire, 2002/11/21
- Re: [Gcl-devel] Re: relocation overflow, Geoff Keating, 2002/11/21
- Re: [Gcl-devel] Re: relocation overflow, Camm Maguire, 2002/11/20
- Re: [Gcl-devel] Re: relocation overflow, Alan Modra, 2002/11/20
- [Gcl-devel] Re: relocation overflow, Camm Maguire, 2002/11/25