13 Nov
2010
13 Nov
'10
9:20 a.m.
Le 13/11/2010 05:16, Graeme Russ a écrit :
I essence, the gd pointer is a unique global variable available prior to relocation. On all other arches, this is achieved by using a reserved register which I do not have the luxury of on x86 :(
Dusting off ooooold knowledge of x86 and without even a glance at x86 u-boot... Since GD is the only global used pre-reloc, can you not ensure it always ends up first in the data segment, and then manage two values for the DS segment reg, one pre-reloc where only gd can be used, and one post-reloc where gd and all the other globals can be accessed?
Regards,
Graeme
Amicalement,
--
Albert.