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target/sh4: Implement prctl_unalign_sigbus

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Leave TARGET_ALIGNED_ONLY set, but use the new CPUState
flag to set MO_UNALN for the instructions that the kernel
handles in the unaligned trap.

The Linux kernel does not handle all memory operations: no
floating-point and no MAC.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20211227150127.2659293-7-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2021-12-27 07:01:27 -08:00 • committed by Laurent Vivier
parent 217d1a5ef8
commit 4da06fb306
3 changed files with 39 additions and 17 deletions
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2
linux-user/sh4/target_prctl.h
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@ -1 +1 @@
/* No special prctl support required. */
#include "../generic/target_prctl_unalign.h"