void gen_intermediate_code(CPUState *cs, TranslationBlock *tb) { CPUM68KState *env = cs->env_ptr; DisasContext dc1, *dc = &dc1; target_ulong pc_start; int pc_offset; int num_insns; int max_insns; /* generate intermediate code */ pc_start = tb->pc; dc->tb = tb; dc->env = env; dc->is_jmp = DISAS_NEXT; dc->pc = pc_start; dc->cc_op = CC_OP_DYNAMIC; dc->cc_op_synced = 1; dc->singlestep_enabled = cs->singlestep_enabled; dc->user = (env->sr & SR_S) == 0; dc->done_mac = 0; dc->writeback_mask = 0; num_insns = 0; max_insns = tb->cflags & CF_COUNT_MASK; if (max_insns == 0) { max_insns = CF_COUNT_MASK; } if (max_insns > TCG_MAX_INSNS) { max_insns = TCG_MAX_INSNS; } gen_tb_start(tb); do { pc_offset = dc->pc - pc_start; gen_throws_exception = NULL; tcg_gen_insn_start(dc->pc, dc->cc_op); num_insns++; if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) { gen_exception(dc, dc->pc, EXCP_DEBUG); dc->is_jmp = DISAS_JUMP; /* The address covered by the breakpoint must be included in [tb->pc, tb->pc + tb->size) in order to for it to be properly cleared -- thus we increment the PC here so that the logic setting tb->size below does the right thing. */ dc->pc += 2; break; } if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) { gen_io_start(); } dc->insn_pc = dc->pc; disas_m68k_insn(env, dc); } while (!dc->is_jmp && !tcg_op_buf_full() && !cs->singlestep_enabled && !singlestep && (pc_offset) < (TARGET_PAGE_SIZE - 32) && num_insns < max_insns); if (tb->cflags & CF_LAST_IO) gen_io_end(); if (unlikely(cs->singlestep_enabled)) { /* Make sure the pc is updated, and raise a debug exception. */ if (!dc->is_jmp) { update_cc_op(dc); tcg_gen_movi_i32(QREG_PC, dc->pc); } gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG)); } else { switch(dc->is_jmp) { case DISAS_NEXT: update_cc_op(dc); gen_jmp_tb(dc, 0, dc->pc); break; default: case DISAS_JUMP: case DISAS_UPDATE: update_cc_op(dc); /* indicate that the hash table must be used to find the next TB */ tcg_gen_exit_tb(0); break; case DISAS_TB_JUMP: /* nothing more to generate */ break; } } gen_tb_end(tb, num_insns); #ifdef DEBUG_DISAS if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM) && qemu_log_in_addr_range(pc_start)) { qemu_log_lock(); qemu_log("----------------\n"); qemu_log("IN: %s\n", lookup_symbol(pc_start)); log_target_disas(cs, pc_start, dc->pc - pc_start, 0); qemu_log("\n"); qemu_log_unlock(); } #endif tb->size = dc->pc - pc_start; tb->icount = num_insns; }