signal: Add FPE_FLTUNK si_code for undiagnosable fp exceptions

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Some architectures cannot always report accurately what kind of
floating-point exception triggered a floating-point exception trap.

This can occur with fp exceptions occurring on lanes in a vector
instruction on arm64 for example.

Rather than have every architecture come up with its own way of
describing such a condition, this patch adds a common FPE_FLTUNK
si_code value to report that an fp exception caused a trap but we
cannot be certain which kind of fp exception it was.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

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Dave Martin 2018-03-01 17:44:06 +00:00 • committed by Eric W. Biederman

parent f6a015498d

commit 266da65e91

2 changed files with 3 additions and 2 deletions

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include/uapi/asm-generic/siginfo.h

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