+static bool branch_emulate_op(struct arch_uprobe *auprobe, struct pt_regs *regs)
+{
+ regs->ip += auprobe->branch.ilen + auprobe->branch.offs;
+ return true;
+}
+
+static struct uprobe_xol_ops branch_xol_ops = {
+ .emulate = branch_emulate_op,
+};
+
+/* Returns -ENOSYS if branch_xol_ops doesn't handle this insn */
+static int branch_setup_xol_ops(struct arch_uprobe *auprobe, struct insn *insn)
+{
+
+ switch (OPCODE1(insn)) {
+ case 0xeb: /* jmp 8 */
+ case 0xe9: /* jmp 32 */
+ break;
+ default:
+ return -ENOSYS;
+ }
+
+ /* has the side-effect of processing the entire instruction */
+ insn_get_length(insn);
+ if (WARN_ON_ONCE(!insn_complete(insn)))
+ return -ENOEXEC;
+
+ auprobe->branch.ilen = insn->length;
+ auprobe->branch.offs = insn->immediate.value;
+
+ auprobe->ops = &branch_xol_ops;
+ return 0;
+}
+