9210 remove KMDB branch debugging support
9211 ::crregs could do with cr2/cr3 support
9209 ::ttrace should be able to filter by thread
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>

*** 19,38 ****
   * CDDL HEADER END
   */
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  /*
   * isa-dependent portions of the kmdb target
   */
  
  #include <kmdb/kvm.h>
- #include <kmdb/kvm_cpu.h>
  #include <kmdb/kmdb_kdi.h>
  #include <kmdb/kmdb_asmutil.h>
  #include <mdb/mdb_debug.h>
  #include <mdb/mdb_err.h>
  #include <mdb/mdb_list.h>
--- 19,37 ----
   * CDDL HEADER END
   */
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  *
+  * Copyright 2018 Joyent, Inc.
   */
  
  /*
   * isa-dependent portions of the kmdb target
   */
  
  #include <kmdb/kvm.h>
  #include <kmdb/kmdb_kdi.h>
  #include <kmdb/kmdb_asmutil.h>
  #include <mdb/mdb_debug.h>
  #include <mdb/mdb_err.h>
  #include <mdb/mdb_list.h>
*** 99,116 ****
                  return (set_errno(EMDB_TGTNOTSUP));
  
          return (mdb_isa_step_out(t, p, pc, fp, sp, instr));
  }
  
- int
- kmt_step_branch(mdb_tgt_t *t)
- {
-         kmt_data_t *kmt = t->t_data;
- 
-         return (kmt_cpu_step_branch(t, kmt->kmt_cpu));
- }
- 
  /*
   * Return the address of the next instruction following a call, or return -1
   * and set errno to EAGAIN if the target should just single-step.
   */
  int
--- 98,107 ----
*** 354,376 ****
          }
  
          return (DCMD_OK);
  }
  
- int
- kmt_msr_validate(const kdi_msr_t *msr)
- {
-         uint64_t val;
- 
-         for (/* */; msr->msr_num != 0; msr++) {
-                 if (kmt_rwmsr(msr->msr_num, &val, rdmsr) < 0)
-                         return (0);
-         }
- 
-         return (1);
- }
- 
  /*ARGSUSED*/
  ssize_t
  kmt_write(mdb_tgt_t *t, const void *buf, size_t nbytes, uintptr_t addr)
  {
          if (!(t->t_flags & MDB_TGT_F_ALLOWIO) &&
--- 345,354 ----