diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2023-03-16 17:44:18 +0100 |
|---|---|---|
| committer | Thomas Huth <thuth@redhat.com> | 2023-03-20 09:32:50 +0100 |
| commit | ce7ca2696811f4a61bdde26767d9c426abc72edf (patch) | |
| tree | 0e10989b6e3e7cf7f2d77ca986a44f49a43d02d9 /target/s390x/tcg | |
| parent | 39344bbc13f419352a102a564cc00a11eb6ab7b9 (diff) | |
target/s390x: Handle EXECUTE of odd addresses
Generate a specification exception in the helper before trying to fetch
the instruction.
Reported-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230316164428.275147-3-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'target/s390x/tcg')
| -rw-r--r-- | target/s390x/tcg/mem_helper.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/target/s390x/tcg/mem_helper.c b/target/s390x/tcg/mem_helper.c index 00afae2b64..96b8ef61b5 100644 --- a/target/s390x/tcg/mem_helper.c +++ b/target/s390x/tcg/mem_helper.c @@ -2468,8 +2468,16 @@ void HELPER(stpq_parallel)(CPUS390XState *env, uint64_t addr, */ void HELPER(ex)(CPUS390XState *env, uint32_t ilen, uint64_t r1, uint64_t addr) { - uint64_t insn = cpu_lduw_code(env, addr); - uint8_t opc = insn >> 8; + uint64_t insn; + uint8_t opc; + + /* EXECUTE targets must be at even addresses. */ + if (addr & 1) { + tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC()); + } + + insn = cpu_lduw_code(env, addr); + opc = insn >> 8; /* Or in the contents of R1[56:63]. */ insn |= r1 & 0xff; |