diff options
| author | Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> | 2015-09-17 19:23:59 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-11-05 12:19:09 +0100 |
| commit | 56c0269a9ec105d3848d9f900b5e38e6b35e2478 (patch) | |
| tree | 6e02c839fb54b4e215849a4734d17686636c43a4 /cpu-exec.c | |
| parent | 26bc60ac82f88d14e65be5387eb4a136edf94f1b (diff) | |
cpu-exec: allow temporary disabling icount
This patch is required for deterministic replay to generate an exception
by trying executing an instruction without changing icount.
It adds new flag to TB for disabling icount while translating it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20150917162359.8676.77011.stgit@PASHA-ISP.def.inno>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'cpu-exec.c')
| -rw-r--r-- | cpu-exec.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/cpu-exec.c b/cpu-exec.c index 7eef0830fe..a1e3d58692 100644 --- a/cpu-exec.c +++ b/cpu-exec.c @@ -184,7 +184,7 @@ static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, uint8_t *tb_ptr) /* Execute the code without caching the generated code. An interpreter could be used if available. */ static void cpu_exec_nocache(CPUState *cpu, int max_cycles, - TranslationBlock *orig_tb) + TranslationBlock *orig_tb, bool ignore_icount) { TranslationBlock *tb; @@ -194,7 +194,8 @@ static void cpu_exec_nocache(CPUState *cpu, int max_cycles, max_cycles = CF_COUNT_MASK; tb = tb_gen_code(cpu, orig_tb->pc, orig_tb->cs_base, orig_tb->flags, - max_cycles | CF_NOCACHE); + max_cycles | CF_NOCACHE + | (ignore_icount ? CF_IGNORE_ICOUNT : 0)); tb->orig_tb = tcg_ctx.tb_ctx.tb_invalidated_flag ? NULL : orig_tb; cpu->current_tb = tb; /* execute the generated code */ @@ -519,7 +520,7 @@ int cpu_exec(CPUState *cpu) if (insns_left > 0) { /* Execute remaining instructions. */ tb = (TranslationBlock *)(next_tb & ~TB_EXIT_MASK); - cpu_exec_nocache(cpu, insns_left, tb); + cpu_exec_nocache(cpu, insns_left, tb, false); align_clocks(&sc, cpu); } cpu->exception_index = EXCP_INTERRUPT; |