Messages in this thread |  | | Subject | Re: APIC, AMD-K6/2 -mcpu=586... | From | Bill Pringlemeir <> | Date | 18 May 2001 15:20:26 -0400 |
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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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