static int cpu_restore_state_from_tb(CPUState *cpu, TranslationBlock *tb, uintptr_t searched_pc) { CPUArchState *env = cpu->env_ptr; TCGContext *s = &tcg_ctx; int j; uintptr_t tc_ptr; #ifdef CONFIG_PROFILER int64_t ti; #endif #ifdef CONFIG_PROFILER ti = profile_getclock(); #endif tcg_func_start(s); gen_intermediate_code_pc(env, tb); if (use_icount) { /* Reset the cycle counter to the start of the block. */ cpu->icount_decr.u16.low += tb->icount; /* Clear the IO flag. */ cpu->can_do_io = 0; } /* find opc index corresponding to search_pc */ tc_ptr = (uintptr_t)tb->tc_ptr; if (searched_pc < tc_ptr) return -1; s->tb_next_offset = tb->tb_next_offset; #ifdef USE_DIRECT_JUMP s->tb_jmp_offset = tb->tb_jmp_offset; s->tb_next = NULL; #else s->tb_jmp_offset = NULL; s->tb_next = tb->tb_next; #endif j = tcg_gen_code_search_pc(s, (tcg_insn_unit *)tc_ptr, searched_pc - tc_ptr); if (j < 0) return -1; /* now find start of instruction before */ while (s->gen_opc_instr_start[j] == 0) { j--; } cpu->icount_decr.u16.low -= s->gen_opc_icount[j]; restore_state_to_opc(env, tb, j); #ifdef CONFIG_PROFILER s->restore_time += profile_getclock() - ti; s->restore_count++; #endif return 0; }