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s390x/tcg: MVC: Fault-safe handling on destructive overlaps 

The last remaining bit for MVC is handling destructive overlaps in a
fault-safe way.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-09-04 11:30:29 +02:00
parent efb1a76ef9
commit b7809f3692
1 changed files with 3 additions and 2 deletions
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5
target/s390x/mem_helper.c
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@ -438,8 +438,9 @@ static uint32_t do_helper_mvc(CPUS390XState *env, uint32_t l, uint64_t dest,
access_memmove(env, &desta, &srca, ra);
} else {
for (i = 0; i < l; i++) {
uint8_t x = cpu_ldub_data_ra(env, src + i, ra);
cpu_stb_data_ra(env, dest + i, x, ra);
uint8_t byte = access_get_byte(env, &srca, i, ra);
access_set_byte(env, &desta, i, byte, ra);
}
}