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s390x/tcg: MVCLU: Fault-safe handling 

The last remaining bit is padding with two bytes.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-09-05 14:56:07 +02:00
parent b7809f3692
commit b8e7b2fe1d
1 changed files with 5 additions and 3 deletions
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8
target/s390x/mem_helper.c
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@ -925,15 +925,17 @@ static inline uint32_t do_mvcl(CPUS390XState *env,
access_memset(env, &desta, pad, ra);
*dest = wrap_address(env, *dest + len);
} else {
desta = access_prepare(env, *dest, len, MMU_DATA_STORE, mmu_idx, ra);
/* The remaining length selects the padding byte. */
for (i = 0; i < len; (*destlen)--, i++) {
if (*destlen & 1) {
cpu_stb_data_ra(env, *dest, pad, ra);
access_set_byte(env, &desta, i, pad, ra);
} else {
cpu_stb_data_ra(env, *dest, pad >> 8, ra);
access_set_byte(env, &desta, i, pad >> 8, ra);
}
*dest = wrap_address(env, *dest + 1);
}
*dest = wrap_address(env, *dest + len);
}
return *destlen ? 3 : cc;