x86: prioritize the FPU traps for the error code

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In the case of multiple FPU errors, prioritize the error codes,
instead of returning __SI_FAULT, which ends up pushing a 0 as the
error code to userspace, a POSIX violation.

For i386, we will simply return if there are no errors at all; for
x86-64 this is probably a "can't happen" (and the code should be
unified), but for this patch, return __SI_FAULT|SI_KERNEL if this ever
happens.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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H. Peter Anvin 2008-12-22 17:56:05 -08:00

parent 55dac3a555

commit adf77bac05

1 changed files with 15 additions and 19 deletions

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arch/x86/kernel/traps.c

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