On 3 March 2013 21:07, Anthony Green <gr...@moxielogic.com> wrote:
> +/* generate intermediate code for basic block 'tb'. */
> +static void
> +gen_intermediate_code_internal(MoxieCPU *cpu, TranslationBlock *tb,
> + bool search_pc)
> +{
> + DisasContext ctx;
> + target_ulong pc_start;
> + uint16_t *gen_opc_end;
> + CPUBreakpoint *bp;
> + int j, lj = -1;
> + CPUMoxieState *env = &cpu->env;
> +
> + pc_start = tb->pc;
> + gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;
> + ctx.pc = pc_start;
> + ctx.saved_pc = -1;
> + ctx.tb = tb;
> + ctx.memidx = 0;
> + ctx.singlestep_enabled = 0;
> + ctx.bstate = BS_NONE;
> +
> + do {
> + if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
> + QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
> + if (ctx.pc == bp->pc) {
> + tcg_gen_movi_i32(cpu_pc, ctx.pc);
> + gen_helper_debug(cpu_env);
> + ctx.bstate = BS_EXCP;
> + goto done_generating;
> + }
> + }
> + }
> +
> + if (search_pc) {
> + j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
> + if (lj < j) {
> + lj++;
> + while (lj < j) {
> + tcg_ctx.gen_opc_instr_start[lj++] = 0;
> + }
> + }
> + tcg_ctx.gen_opc_pc[lj] = ctx.pc;
> + tcg_ctx.gen_opc_instr_start[lj] = 1;
> + }
> + ctx.opcode = cpu_lduw_code(env, ctx.pc);
> + ctx.pc += decode_opc(cpu, &ctx);
> +
> + if (env->singlestep_enabled) {
> + break;
> + }
> +
> + if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0) {
> + break;
> + }
> + } while (ctx.bstate == BS_NONE && tcg_ctx.gen_opc_ptr < gen_opc_end);
> +
> + if (env->singlestep_enabled) {
> + tcg_gen_movi_tl(cpu_pc, ctx.pc);
> + gen_helper_debug(cpu_env);
> + } else {
> + switch (ctx.bstate) {
> + case BS_STOP:
> + case BS_NONE:
> + gen_goto_tb(env, &ctx, 0, ctx.pc);
> + break;
> + case BS_EXCP:
> + tcg_gen_exit_tb(0);
> + break;
> + case BS_BRANCH:
> + default:
> + break;
> + }
> + }
> + done_generating:
> + *tcg_ctx.gen_opc_ptr = INDEX_op_end;
> + if (search_pc) {
> + j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
> + lj++;
> + while (lj <= j) {
> + tcg_ctx.gen_opc_instr_start[lj++] = 0;
> + }
> + } else {
> + tb->size = ctx.pc - pc_start;
> + }
> +}
Now that my 'get rid of cpu_tb_unlink()' patch series has been
applied, you must call 'gen_tb_start()' and 'gen_tb_end()' in
the right places in this function, or interrupts will not be
able to stop QEMU executing translated code.
thanks
-- PMM
