Commit b8e7b2fe authored by David Hildenbrand's avatar David Hildenbrand
Browse files

s390x/tcg: MVCLU: Fault-safe handling 



The last remaining bit is padding with two bytes.

Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: default avatarDavid Hildenbrand <david@redhat.com>
parent b7809f36

target/s390x/mem_helper.c

+5 −3
Original line number Diff line number Diff line
@@ -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;