sys/arm: Fix DTrace trap hook

Move the dtrace_trap hook at the start of the abort handler to exit
early when a trap is handled by DTrace.

Fix the type argument to be the actual fault type instead of the value
of the FAR. The latter will need to be added to the trapframe, until
then DTrace will report unmapped addresses as the null address.

Correct the comment of the PUSHFRAMEINSVC assembler macro to reflect
that coming from SVC32 mode is expected for DTrace traps.

PR:             298064
MFC after:      1 month
Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D59279

0 files changed, 0 insertions, 0 deletions