+static int do_bpt(struct pt_regs *regs)
+{
+ unsigned long bundle, bcode, bpt;
+
+ bundle = *(unsigned long *)instruction_pointer(regs);
+
+ /*
+ * bpt shoule be { bpt; nop }, which is 0x286a44ae51485000ULL.
+ * we encode the unused least significant bits for other purpose.
+ */
+ bpt = bundle & ~((1ULL << 12) - 1);
+ if (bpt != TILE_BPT_BUNDLE)
+ return 0;
+
+ bcode = bundle & ((1ULL << 12) - 1);
+ /*
+ * notify the kprobe handlers, if instruction is likely to
+ * pertain to them.
+ */
+ switch (bcode) {
+ /* breakpoint_insn */
+ case 0:
+ notify_die(DIE_BREAK, "debug", regs, bundle,
+ INT_ILL, SIGTRAP);
+ break;
+ /* compiled_bpt */
+ case DIE_COMPILED_BPT:
+ notify_die(DIE_COMPILED_BPT, "debug", regs, bundle,
+ INT_ILL, SIGTRAP);
+ break;
+ /* breakpoint2_insn */
+ case DIE_SSTEPBP:
+ notify_die(DIE_SSTEPBP, "single_step", regs, bundle,
+ INT_ILL, SIGTRAP);
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+