Incrementally paves the way towards using the generic instruction translation
loop.
Signed-off-by: Lluís Vilanova <vilan...@ac.upc.edu>
Reviewed-by: Richard Henderson <r...@twiddle.net>
Reviewed-by: Emilio G. Cota <c...@braap.org>
---
target/i386/translate.c | 58 ++++++++++++++++++++++++++++++++++++++---------
1 file changed, 47 insertions(+), 11 deletions(-)
diff --git a/target/i386/translate.c b/target/i386/translate.c
index a4b9e5628f..d39e65e5b0 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -8455,6 +8455,25 @@ static void i386_tr_insn_start(DisasContextBase *dcbase,
CPUState *cpu)
tcg_gen_insn_start(dc->base.pc_next, dc->cc_op);
}
+static BreakpointCheckType i386_tr_breakpoint_check(
+ DisasContextBase *dcbase, CPUState *cpu, const CPUBreakpoint *bp)
+{
+ DisasContext *dc = container_of(dcbase, DisasContext, base);
+ /* If RF is set, suppress an internally generated breakpoint. */
+ int flags = dc->base.tb->flags & HF_RF_MASK ? BP_GDB : BP_ANY;
+ if (bp->flags & flags) {
+ gen_debug(dc, dc->base.pc_next - dc->cs_base);
+ /* 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->base.pc_next += 1;
+ return BC_HIT_TB;
+ } else {
+ return BC_MISS;
+ }
+}
+
/* generate intermediate code for basic block 'tb'. */
void gen_intermediate_code(CPUState *cs, TranslationBlock *tb)
{
@@ -8485,18 +8504,35 @@ void gen_intermediate_code(CPUState *cs,
TranslationBlock *tb)
i386_tr_insn_start(&dc->base, cs);
num_insns++;
- /* If RF is set, suppress an internally generated breakpoint. */
- if (unlikely(cpu_breakpoint_test(cs, dc->base.pc_next,
- tb->flags & HF_RF_MASK
- ? BP_GDB : BP_ANY))) {
- gen_debug(dc, dc->base.pc_next - dc->cs_base);
- /* 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->base.pc_next += 1;
- goto done_generating;
+ if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) {
+ CPUBreakpoint *bp;
+ QTAILQ_FOREACH(bp, &cs->breakpoints, entry) {
+ if (bp->pc == dc->base.pc_next) {
+ BreakpointCheckType bp_check =
+ i386_tr_breakpoint_check(&dc->base, cs, bp);
+ switch (bp_check) {
+ case BC_MISS:
+ /* Target ignored this breakpoint, go to next */
+ break;
+ case BC_HIT_INSN:
+ /* Hit, keep translating */
+ /*
+ * TODO: if we're never going to have more than one
+ * BP in a single address, we can simply use a
+ * bool here.
+ */
+ goto done_breakpoints;
+ case BC_HIT_TB:
+ /* Hit, end TB */
+ goto done_generating;
+ default:
+ g_assert_not_reached();
+ }
+ }
+ }
}
+ done_breakpoints:
+
if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
gen_io_start();
}
