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SubjectRe: APIC, AMD-K6/2 -mcpu=586...
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>>>>> "JAM" == J A Magallon <jamagallon@able.es> writes:

JAM> That is not the problem. The problem is that the registers have
JAM> to lay in a defined way, transcribed to a C struct, and that
JAM> pgcc lays badly that struct.

WJP> Yes, I understand that. I was showing a way to find the value
WJP> of padding needed to align the register store in the structure.
WJP> Perhaps I should have shown a mod to asm/processor.h,
[snip]
WJP> I was describing a way to make things independent of the
WJP> compiler layout of the structs. However, this complicates the
WJP> build process, and people might not like the padding due to
WJP> cache alignment details.

Sorry, they would obviously declare it as such if the kernel developers
wanted to.

/* floating point info */
unsigned char fpAlign[0] __attribute__ ((aligned (16)));
union i387_union i387;

This is a much simpler way of achieving what I was trying to explain
previously. I think that this syntax has been in the GCC extensions
for some time.

regards,
Bill Pringlemeir.


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