10568 bop_trap() should report %cr2

*** 2015,2024 ****
--- 2015,2025 ----
          bop_printf(NULL, "instruction pointer  0x%lx\n", tf->inst_ptr);
          bop_printf(NULL, "code segment         0x%lx\n", tf->code_seg & 0xffff);
          bop_printf(NULL, "flags register       0x%lx\n", tf->flags_reg);
          bop_printf(NULL, "return %%rsp          0x%lx\n", tf->stk_ptr);
          bop_printf(NULL, "return %%ss           0x%lx\n", tf->stk_seg & 0xffff);
+         bop_printf(NULL, "%%cr2                 0x%lx\n", getcr2());
  
          /* grab %[er]bp pushed by our code from the stack */
          fakeframe.old_frame = (bop_frame_t *)*(tfp - 3);
          fakeframe.retaddr = (pc_t)tf->inst_ptr;
          bop_printf(NULL, "Attempting stack backtrace:\n");