On Tue, Jul 31, 2001 at 08:29:12AM -0700, John D. Davis wrote:
> Looking at the system map from the generic build of 2.4.3, it looks like
> the code is 64 bit. The upper 32 bits are "f" instead of 0.
No. Sign extended, that is bit 31 is copied into bits 32 to 63.
> I built it > using the R4600 flag. This differs from the system map for
> 2.4.0-test9 where the upper 32 bits are 0.
No. Different binutils. Older binutils did zero extend 32-bit addresses
to 64-bit addresses in the objdump output which is wrong.
> For the indy, do I specify mips2 to generate 32 bit code?
For the kernel we use a few 64-bit instructions on the Indy though. These
are carefully chosen such that nothing go wrong like exceptions corrupting
the upper 32-bit of a register.
> objdump says it is ELF32, but it doesn't look like that. I would like to
> generate 32bit.
ELF is an object format. Nothing prevents you from putting 64-bit code into
a 32-bit ELF file and vice versa. You just need to be careful.