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target/m68k: use M68K_FEATURE_MOVEFROMSR_PRIV feature for move_from_sr privilege check

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Now that M68K_FEATURE_M68000 has been renamed to M68K_FEATURE_M68K it is easier
to see that the privilege exception check is wrong: it is currently only generated
for ColdFire CPUs when in fact it should also be generated for Motorola CPUs from
the 68010 onwards.

Introduce a new M68K_FEATURE_MOVEFROMSR_PRIV feature which is set for all non-
Motorola CPUs, and for all Motorola CPUs from the 68010 onwards and use it to
determine whether a privilege exception should be generated for the MOVE-from-SR
instruction.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220925134804.139706-3-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2022-09-25 14:48:04 +01:00 • committed by Laurent Vivier
parent 2dc7bf63cf
commit b342e56b23
3 changed files with 8 additions and 1 deletions
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2
target/m68k/translate.c
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@ -4624,7 +4624,7 @@ DISAS_INSN(move_from_sr)
{
TCGv sr;
if (IS_USER(s) && !m68k_feature(env, M68K_FEATURE_M68K)) {
if (IS_USER(s) && m68k_feature(env, M68K_FEATURE_MOVEFROMSR_PRIV)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}