Re: [U-Boot-Users] Fixup entries
On Wed, 2008-04-09 at 18:19 +0200, Joakim Tjernlund wrote:
-----Original Message----- From: Kenneth Johansson [mailto:kenneth@southpole.se] Wonder if there is something else in u-boot that use function pointers and work by accident due to the fact that the old address in flash is still valid.
Oh yes, there are a few such pointers. And the conversion to using fixups instead is a bit lazy. Several manual relocations has only been nullified by setting gd->reloc_off=0 instead of #ifdef:ing out the relevant code. Feel free to send patches :)
Jocke
If by lazy you mean less error prone and obviously simpler :). clearly using -mrelocatable is the smarter thing to do.
I had this misconception that the GOT was all that was needed for relocation. Could not find any useful information on what rules apply to gcc and binutils for handling stuff in this fixup section.
Anybody have any information on this?
-----Original Message----- From: kenneth johansson [mailto:kenneth@southpole.se] Sent: den 10 april 2008 01:00 To: Joakim Tjernlund Cc: u-boot-users@lists.sourceforge.net Subject: RE: [U-Boot-Users] Fixup entries
On Wed, 2008-04-09 at 18:19 +0200, Joakim Tjernlund wrote:
-----Original Message----- From: Kenneth Johansson [mailto:kenneth@southpole.se] Wonder if there is something else in u-boot that use function pointers and work by accident due to the fact that the old address in flash is still valid.
Oh yes, there are a few such pointers. And the conversion to using fixups instead is a bit lazy. Several manual relocations has only been nullified by setting gd->reloc_off=0 instead of #ifdef:ing out the relevant code. Feel free to send patches :)
JockeIf by lazy you mean less error prone and obviously simpler :). clearly using -mrelocatable is the smarter thing to do.
I had this misconception that the GOT was all that was needed for relocation. Could not find any useful information on what rules apply to gcc and binutils for handling stuff in this fixup section.
Anybody have any information on this?
Nope, never found anything either. To see a working one in u-boot, look at mpc83xx start.S and its linker scripts.
Jocke
participants (2)
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Joakim Tjernlund -
kenneth johansson