[OpenBIOS] ppc64 MMU issues

Segher Boessenkool segher at kernel.crashing.org
Tue Nov 16 00:46:38 CET 2010

> Am 16.11.2010 um 00:02 schrieb Segher Boessenkool:
>>>> Who's responsible for r2 setup - GCC-generated code or QEMU?
>>> r2 contains the GOT IIRC. But for ABI questions, it's probably best
>>> to
>>> consult Segher :). Unless I'm completely mistaken, usually the loader
>>> initializes r2, so in this case the asm code needs to set it up
>>> properly.
>> Depends what you call "loader".  Usually your crt1 equivalent sets
>> GPR2.
>> It is probably a good idea to set it in all exception handlers as well
>> (if they want to call C code, or need it otherwise).
> But set it to what value? :)

TOC base + 0x8000.

On an ELF binary like your Linux programs, this is actually stored
in the function descriptor pointed to by e_entry.


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