diff options
Diffstat (limited to 'cpu-exec.c')
| -rw-r--r-- | cpu-exec.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/cpu-exec.c b/cpu-exec.c index 9407c66f62..f49a436e1a 100644 --- a/cpu-exec.c +++ b/cpu-exec.c @@ -202,16 +202,20 @@ static void cpu_exec_nocache(CPUState *cpu, int max_cycles, TranslationBlock *orig_tb, bool ignore_icount) { TranslationBlock *tb; + bool old_tb_flushed; /* Should never happen. We only end up here when an existing TB is too long. */ if (max_cycles > CF_COUNT_MASK) max_cycles = CF_COUNT_MASK; + old_tb_flushed = cpu->tb_flushed; + cpu->tb_flushed = false; tb = tb_gen_code(cpu, orig_tb->pc, orig_tb->cs_base, orig_tb->flags, max_cycles | CF_NOCACHE | (ignore_icount ? CF_IGNORE_ICOUNT : 0)); - tb->orig_tb = tcg_ctx.tb_ctx.tb_invalidated_flag ? NULL : orig_tb; + tb->orig_tb = cpu->tb_flushed ? NULL : orig_tb; + cpu->tb_flushed |= old_tb_flushed; cpu->current_tb = tb; /* execute the generated code */ trace_exec_tb_nocache(tb, tb->pc); @@ -232,8 +236,6 @@ static TranslationBlock *tb_find_physical(CPUState *cpu, unsigned int h; tb_page_addr_t phys_pc, phys_page1; - tcg_ctx.tb_ctx.tb_invalidated_flag = 0; - /* find translated block using physical mappings */ phys_pc = get_page_addr_code(env, pc); phys_page1 = phys_pc & TARGET_PAGE_MASK; @@ -446,6 +448,7 @@ int cpu_exec(CPUState *cpu) } last_tb = NULL; /* forget the last executed TB after exception */ + cpu->tb_flushed = false; /* reset before first TB lookup */ for(;;) { interrupt_request = cpu->interrupt_request; if (unlikely(interrupt_request)) { @@ -510,14 +513,12 @@ int cpu_exec(CPUState *cpu) } tb_lock(); tb = tb_find_fast(cpu); - /* Note: we do it here to avoid a gcc bug on Mac OS X when - doing it in tb_find_slow */ - if (tcg_ctx.tb_ctx.tb_invalidated_flag) { - /* as some TB could have been invalidated because - of memory exceptions while generating the code, we - must recompute the hash index here */ + if (cpu->tb_flushed) { + /* Ensure that no TB jump will be modified as the + * translation buffer has been flushed. + */ last_tb = NULL; - tcg_ctx.tb_ctx.tb_invalidated_flag = 0; + cpu->tb_flushed = false; } /* See if we can patch the calling TB. */ if (last_tb && !qemu_loglevel_mask(CPU_LOG_TB_NOCHAIN)) { |