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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>
This commit is contained in:
Ilya Leoshkevich 2023-03-16 17:44:18 +01:00 committed by Thomas Huth
parent 39344bbc13
commit ce7ca26968
1 changed files with 10 additions and 2 deletions
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12
target/s390x/tcg/mem_helper.c
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@ -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;