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target/s390x: Handle branching to odd addresses 

Let branching happen and try to generate a new translation block with
an odd address. Generate a specification exception in
cpu_get_tb_cpu_state().

Reported-by: Harold Grovesteen <h.grovsteen@tx.rr.com>
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: <20230316164428.275147-2-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Ilya Leoshkevich 2023-03-16 17:44:17 +01:00 committed by Thomas Huth
parent 5e8a0c6291
commit 39344bbc13
1 changed files with 9 additions and 0 deletions
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9
target/s390x/cpu.h
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@ -29,6 +29,7 @@
#include "cpu_models.h"
#include "exec/cpu-defs.h"
#include "qemu/cpu-float.h"
#include "tcg/tcg_s390x.h"
#define ELF_MACHINE_UNAME "S390X"
@ -383,6 +384,14 @@ static inline int cpu_mmu_index(CPUS390XState *env, bool ifetch)
static inline void cpu_get_tb_cpu_state(CPUS390XState* env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
if (env->psw.addr & 1) {
/*
* Instructions must be at even addresses.
* This needs to be checked before address translation.
*/
env->int_pgm_ilen = 2; /* see s390_cpu_tlb_fill() */
tcg_s390_program_interrupt(env, PGM_SPECIFICATION, 0);
}
*pc = env->psw.addr;
*cs_base = env->ex_value;
*flags = (env->psw.mask >> FLAG_MASK_PSW_SHIFT) & FLAG_MASK_PSW;