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At Tue, 20 May 2003 16:52:23 -0400, Andrew Cagney wrote:
> At Sat, 17 May 2003 00:41:10 +0000 (UTC), "Kevin Buettner" wrote:
>
>> Unfortunately, it isn't reasonable to use an ABI-specific RDA to debug
>> an application which uses a different ABI. It might kind of, sort of
>> work some of the time, but there are various things that won't work. >> You've just identified one of the problems.
> > > BTW, because of this kind of problem, does it even make sense that
> when talking to a mips64 kernel but using an o32 rda (or gdbserver
> 8-), you'd use a "mips64" protocol? I.e., why wouldn't it just use
> the 32-bit mips protocol, since from you're debugging a 32-bit binary
> with a 32-bit debugging daemon...
Ignoring the FP registers, I think it does make sense. o32 code does run on a 64 bit ISA. Who is GDB to decide what the ISA should be.
I think even w.r.t. FP registers it makes sense. 8-)
in o32, there are exactly (32 * 32 bits) worth of FP registers.
They've got a very strange organization, and different operations on them set them in non-obvious ways, but they're still 32*32 bits.
cgd
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