Wolfgang Denk wd@denx.de wrote on 2011/01/09 21:54:34:
Dear Joakim Tjernlund,
In message 1292838435-14958-3-git-send-email-Joakim.Tjernlund@transmode.se you wrote:
By copying the GOT to the end of the INIT_RAM(dcache) and relocating it there, it is much esier to support true PIC on u-boot. This cannot handle FIXUP so C code that depends on fixups before relocation to RAM must use LINK_OFF to calculate the difference.
...
- /*
- Copy GOT to cache and relocate it
- This assumes there is enough space at the end
- INIT_RAM to hold a copy of the GOT.
- */
Is it correct to assume that system will crash horribly if for some reason the GOT should not fit?
Yes ATM. I considered adding tests but it will cost more space and I am not sure how to report the error this early.
And this means that there is no way to adapt this approach to systems where initial RAM is restrictd and not big enough to hold a copy of the GOT?
Can't think of one, you need somewhere to put the GOT. You can work on reducing the GOT size though.
Jocke