30 Oct
2010
30 Oct
'10
9:21 p.m.
Dear Albert ARIBAUD,
In message 4CCC69E4.8090103@free.fr you wrote:
ldr r0, _TEXT_BASE /* r0<- Text base */ %%% why are we using _TEXT_BASE here and not _start?
Because we're accessing the relocation tables in the FLASH (or freshly NAND-loaded) "source" copy of u-boot, not in the RAM "target" copy (in which the relocation tables won't exist).
Sorry, but I don't understand this explanation.
With the linker script we make sure that the symbol _start gets linked to the absolute address CONFIG_SYS_TEXT_BASE, right? And _TEXT_BASE is a storage that holds exactly the value CONFIG_SYS_TEXT_BASE, which should be identical to the address of _start ?
Best regards,
Wolfgang Denk
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