arm64: insn: remove BUG_ON from codegen

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During code generation, we used to BUG_ON unknown/unsupported encoding
or invalid parameters.

Instead, now we report these as errors and simply return the
instruction AARCH64_BREAK_FAULT. Users of these codegen helpers should
check for and handle this failure condition as appropriate.

Otherwise, unhandled codegen failure will result in trapping at
run-time due to AARCH64_BREAK_FAULT, which is arguably better than a
BUG_ON.

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Zi Shen Lim 2016-01-13 23:33:21 -08:00 • committed by David S. Miller

parent dd7445ad6b

commit c94ae4f7c5

1 changed files with 112 additions and 53 deletions

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arch/arm64/kernel/insn.c

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