path: root/devel/gdb6/files/patch-kvm-fbsd.c

--- gdb/kvm-fbsd.c	Fri Jan  3 08:57:23 2003
+++ gdb/kvm-fbsd.c	Fri Jan  3 08:57:20 2003
@@ -0,0 +1,756 @@
+/* Kernel core dump functions below target vector, for GDB.
+   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995
+   Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+/* $FreeBSD: /tmp/pcvs/ports/devel/gdb6/files/Attic/patch-kvm-fbsd.c,v 1.4 2003-01-04 20:19:55 mp Exp $ */
+
+/*
+ * This works like "remote" but, you use it like this:
+ *     target kcore /dev/mem
+ * or
+ *     target kcore /var/crash/host/core.0
+ *
+ * This way makes it easy to short-circut the whole bfd monster,
+ * and direct the inferior stuff to our libkvm implementation.
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/proc.h>
+#include <sys/user.h>
+#include <ctype.h>
+#include <errno.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <sys/sysctl.h>
+#include <paths.h>
+#include <readline/tilde.h>
+#include <machine/frame.h>
+
+#include "defs.h"
+#include "gdb_string.h"
+#include "frame.h"  /* required by inferior.h */
+#include "inferior.h"
+#include "symtab.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "command.h"
+#include "bfd.h"
+#include "target.h"
+#include "gdbcore.h"
+#include "regcache.h"
+
+#if __FreeBSD_version >= 500032
+static void
+kcore_files_info (struct target_ops *);
+
+static void
+kcore_close (int);
+
+static void
+get_kcore_registers (int);
+
+static int
+xfer_mem (CORE_ADDR, char *, int, int, struct mem_attrib *,
+          struct target_ops *);
+
+static int
+xfer_umem (CORE_ADDR, char *, int, int);
+
+static char		*core_file;
+static kvm_t		*core_kd;
+static struct pcb	cur_pcb;
+static struct kinfo_proc *cur_proc;
+
+static struct target_ops kcore_ops;
+
+int kernel_debugging;
+int kernel_writablecore;
+
+/* Read the "thing" at kernel address 'addr' into the space pointed to
+   by point.  The length of the "thing" is determined by the type of p.
+   Result is non-zero if transfer fails.  */
+
+#define kvread(addr, p) \
+  (target_read_memory ((CORE_ADDR) (addr), (char *) (p), sizeof (*(p))))
+
+static CORE_ADDR
+ksym_kernbase (void)
+{
+  static CORE_ADDR kernbase;
+  struct minimal_symbol *sym;
+
+  if (kernbase == 0)
+    {
+      sym = lookup_minimal_symbol ("kernbase", NULL, NULL);
+      if (sym == NULL) {
+	kernbase = KERNBASE;
+      } else {
+	kernbase = SYMBOL_VALUE_ADDRESS (sym);
+      }
+    }
+  return kernbase;
+}
+
+#define	KERNOFF		(ksym_kernbase ())
+#define	INKERNEL(x)	((x) >= KERNOFF)
+
+CORE_ADDR
+ksym_lookup(const char *name)
+{
+  struct minimal_symbol *sym;
+
+  sym = lookup_minimal_symbol (name, NULL, NULL);
+  if (sym == NULL)
+    error ("kernel symbol `%s' not found.", name);
+
+  return SYMBOL_VALUE_ADDRESS (sym);
+}
+
+/* Provide the address of an initial PCB to use.
+   If this is a crash dump, try for "dumppcb".
+   If no "dumppcb" or it's /dev/mem, use proc0.
+   Return the core address of the PCB we found.  */
+
+static CORE_ADDR
+initial_pcb (void)
+{
+  struct minimal_symbol *sym;
+  CORE_ADDR addr;
+  void *val;
+
+  /* Make sure things are open...  */
+  if (!core_kd || !core_file)
+    return (0);
+
+  /* If this is NOT /dev/mem try for dumppcb.  */
+  if (strncmp (core_file, _PATH_DEV, sizeof _PATH_DEV - 1))
+    {
+      sym = lookup_minimal_symbol ("dumppcb", NULL, NULL);
+      if (sym != NULL)
+	{
+	  addr = SYMBOL_VALUE_ADDRESS (sym);
+	  return (addr);
+	}
+  }
+
+  /* OK, just use thread0's pcb.  Note that curproc might
+     not exist, and if it does, it will point to gdb.
+     Therefore, just use proc0 and let the user set
+     some other context if they care about it.  */
+
+  addr = ksym_lookup ("thread0");
+  if (kvread (addr, &val))
+    {
+      error ("cannot read thread0 pointer at %x\n", addr);
+      val = 0;
+    }
+  else
+    {
+      /* Read the PCB address in thread structure.  */
+      addr += offsetof (struct thread, td_pcb);
+      if (kvread (addr, &val))
+	{
+	  error ("cannot read thread0->td_pcb pointer at %x\n", addr);
+	  val = 0;
+	}
+    }
+
+  /* thread0 is wholly in the kernel and cur_proc is only used for
+     reading user mem, so no point in setting this up.  */
+  cur_proc = 0;
+
+  return ((CORE_ADDR)val);
+}
+
+/* Set the current context to that of the PCB struct at the system address
+   passed.  */
+
+static int
+set_context (CORE_ADDR addr)
+{
+  CORE_ADDR procaddr = 0;
+
+  if (kvread (addr, &cur_pcb))
+    error ("cannot read pcb at %#x", addr);
+
+  /* Fetch all registers from core file.  */
+  target_fetch_registers (-1);
+
+  /* Now, set up the frame cache, and print the top of stack.  */
+  flush_cached_frames ();
+  set_current_frame (create_new_frame (read_fp (), read_pc ()));
+  select_frame (get_current_frame ());
+  return (0);
+}
+
+/* Discard all vestiges of any previous core file and mark data and stack
+   spaces as empty.  */
+
+/* ARGSUSED */
+static void
+kcore_close (int quitting)
+{
+
+  inferior_ptid = null_ptid;	/* Avoid confusion from thread stuff.  */
+
+  if (core_kd)
+    {
+      kvm_close (core_kd);
+      free (core_file);
+      core_file = NULL;
+      core_kd = NULL;
+    }
+}
+
+/* This routine opens and sets up the core file bfd.  */
+
+static void
+kcore_open (char *filename /* the core file */, int from_tty)
+{
+  kvm_t *kd;
+  const char *p;
+  struct cleanup *old_chain;
+  char buf[256], *cp;
+  int ontop;
+  CORE_ADDR addr;
+
+  target_preopen (from_tty);
+
+  /* The exec file is required for symbols.  */
+  if (exec_bfd == NULL)
+    error ("No kernel exec file specified");
+
+  if (core_kd)
+    {
+      error ("No core file specified."
+	     "  (Use `detach' to stop debugging a core file.)");
+      return;
+    }
+
+  if (!filename)
+    {
+      error ("No core file specified.");
+      return;
+    }
+
+  filename = tilde_expand (filename);
+  if (filename[0] != '/')
+    {
+      cp = concat (current_directory, "/", filename, NULL);
+      free (filename);
+      filename = cp;
+    }
+
+  old_chain = make_cleanup (free, filename);
+
+  kd = kvm_open (bfd_get_filename(exec_bfd), filename, NULL,
+		 kernel_writablecore ? O_RDWR: O_RDONLY, 0);
+  if (kd == NULL)
+    {
+      perror_with_name (filename);
+      return;
+    }
+
+  /* Looks semi-reasonable.  Toss the old core file and work on the new.  */
+
+  discard_cleanups (old_chain);		/* Don't free filename any more.  */
+  core_file = filename;
+  unpush_target (&kcore_ops);
+  ontop = !push_target (&kcore_ops);
+
+  /* Note unpush_target (above) calls kcore_close.  */
+  core_kd = kd;
+
+  /* Print out the panic string if there is one.  */
+  if (kvread (ksym_lookup ("panicstr"), &addr) == 0 &&
+      addr != 0 && 
+      target_read_memory (addr, buf, sizeof(buf)) == 0)
+    {
+
+      for (cp = buf; cp < &buf[sizeof(buf)] && *cp; cp++)
+	if (!isascii (*cp) || (!isprint (*cp) && !isspace (*cp)))
+	  *cp = '?';
+      *cp = '\0';
+      if (buf[0] != '\0')
+	printf_filtered ("panic: %s\n", buf);
+    }
+
+  /* Print all the panic messages if possible.  */
+  if (symfile_objfile != NULL)
+    {
+      printf ("panic messages:\n---\n");
+      snprintf (buf, sizeof buf,
+                "/sbin/dmesg -N %s -M %s | \
+                 /usr/bin/awk '/^(panic:|Fatal trap) / { printing = 1 } \
+                               { if (printing) print $0 }'",
+                symfile_objfile->name, filename);
+      fflush (stdout);
+      system (buf);
+      printf ("---\n");
+    }
+
+  if (!ontop)
+    {
+      warning ("you won't be able to access this core file until you terminate\n"
+		"your %s; do ``info files''", target_longname);
+      return;
+    }
+
+  /* Now, set up process context, and print the top of stack.  */
+  (void)set_context (initial_pcb());
+  print_stack_frame (selected_frame, frame_relative_level(selected_frame), 1);
+}
+
+static void
+kcore_detach (char *args, int from_tty)
+{
+  if (args)
+    error ("Too many arguments");
+  unpush_target (&kcore_ops);
+  reinit_frame_cache ();
+  if (from_tty)
+    printf_filtered ("No kernel core file now.\n");
+}
+
+#ifdef __alpha__
+
+#include "alpha/tm-alpha.h"
+#include "alpha-tdep.h"
+
+#ifndef S0_REGNUM
+#define S0_REGNUM (ALPHA_T7_REGNUM+1)
+#endif
+
+fetch_kcore_registers (struct pcb *pcbp)
+{
+
+  /* First clear out any garbage.  */
+  memset (registers, '\0', REGISTER_BYTES);
+
+  /* SP */
+  *(long *) &registers[REGISTER_BYTE (SP_REGNUM)] =
+    pcbp->pcb_hw.apcb_ksp;
+
+  /* S0 through S6 */
+  memcpy (&registers[REGISTER_BYTE (S0_REGNUM)],
+          &pcbp->pcb_context[0], 7 * sizeof (long));
+
+  /* PC */
+  *(long *) &registers[REGISTER_BYTE (PC_REGNUM)] =
+    pcbp->pcb_context[7];
+
+  registers_fetched ();
+}
+
+
+CORE_ADDR
+fbsd_kern_frame_saved_pc (struct frame_info *fi)
+{
+  struct minimal_symbol *sym;
+  CORE_ADDR this_saved_pc;
+
+  this_saved_pc = FRAME_SAVED_PC(fi);
+
+  sym = lookup_minimal_symbol_by_pc (this_saved_pc);
+
+  if (sym != NULL &&
+      (strcmp (SYMBOL_NAME (sym), "XentArith") == 0 ||
+       strcmp (SYMBOL_NAME (sym), "XentIF") == 0 ||
+       strcmp (SYMBOL_NAME (sym), "XentInt") == 0 ||
+       strcmp (SYMBOL_NAME (sym), "XentMM") == 0 ||
+       strcmp (SYMBOL_NAME (sym), "XentSys") == 0 ||
+       strcmp (SYMBOL_NAME (sym), "XentUna") == 0 ||
+       strcmp (SYMBOL_NAME (sym), "XentRestart") == 0))
+    {
+      return (read_memory_integer (fi->frame + 32 * 8, 8));
+    }
+  else
+    {
+      return (this_saved_pc);
+    }
+}
+
+#endif /* __alpha__ */
+
+#ifdef __i386__
+
+static CORE_ADDR
+ksym_maxuseraddr (void)
+{
+  static CORE_ADDR maxuseraddr;
+  struct minimal_symbol *sym;
+
+  if (maxuseraddr == 0)
+    {
+      sym = lookup_minimal_symbol ("PTmap", NULL, NULL);
+      if (sym == NULL) {
+	maxuseraddr = VM_MAXUSER_ADDRESS;
+      } else {
+	maxuseraddr = SYMBOL_VALUE_ADDRESS (sym);
+      }
+    }
+  return maxuseraddr;
+}
+
+
+/* Symbol names of kernel entry points.  Use special frames.  */
+#define	KSYM_TRAP	"calltrap"
+#define	KSYM_INTR	"Xintr"
+#define	KSYM_FASTINTR	"Xfastintr"
+#define	KSYM_OLDSYSCALL	"Xlcall_syscall"
+#define	KSYM_SYSCALL	"Xint0x80_syscall"
+
+/* The following is FreeBSD-specific hackery to decode special frames
+   and elide the assembly-language stub.  This could be made faster by
+   defining a frame_type field in the machine-dependent frame information,
+   but we don't think that's too important right now.  */
+enum frametype { tf_normal, tf_trap, tf_interrupt, tf_syscall };
+
+CORE_ADDR
+fbsd_kern_frame_saved_pc (struct frame_info *fr)
+{
+  struct minimal_symbol *sym;
+  CORE_ADDR this_saved_pc;
+  enum frametype frametype;
+
+  this_saved_pc = read_memory_integer (fr->frame + 4, 4);
+  sym = lookup_minimal_symbol_by_pc (this_saved_pc);
+  frametype = tf_normal;
+  if (sym != NULL)
+    {
+      if (strcmp (SYMBOL_NAME (sym), KSYM_TRAP) == 0)
+	frametype = tf_trap;
+      else
+	if (strncmp (SYMBOL_NAME (sym), KSYM_INTR,
+	    strlen (KSYM_INTR)) == 0 || strncmp (SYMBOL_NAME(sym),
+	    KSYM_FASTINTR, strlen (KSYM_FASTINTR)) == 0)
+	  frametype = tf_interrupt;
+      else
+	if (strcmp (SYMBOL_NAME (sym), KSYM_SYSCALL) == 0 ||
+	    strcmp (SYMBOL_NAME (sym), KSYM_OLDSYSCALL) == 0)
+	  frametype = tf_syscall;
+    }
+
+  switch (frametype)
+    {
+      default:
+      case tf_normal:
+        return (this_saved_pc);
+#define oEIP   offsetof (struct trapframe, tf_eip)
+
+      case tf_trap:
+	return (read_memory_integer (fr->frame + 8 + oEIP, 4));
+
+      case tf_interrupt:
+	return (read_memory_integer (fr->frame + 12 + oEIP, 4));
+
+      case tf_syscall:
+	return (read_memory_integer (fr->frame + 8 + oEIP, 4));
+#undef oEIP
+    }
+}
+
+static void
+fetch_kcore_registers (struct pcb *pcb)
+{
+  int i;
+  int noreg;
+
+  /* Get the register values out of the sys pcb and store them where
+     `read_register' will find them.  */
+  /*
+   * XXX many registers aren't available.
+   * XXX for the non-core case, the registers are stale - they are for
+   *     the last context switch to the debugger.
+   * XXX gcc's register numbers aren't all #defined in tm-i386.h.
+   */
+  noreg = 0;
+  for (i = 0; i < 3; ++i)		/* eax,ecx,edx */
+    supply_register (i, (char *)&noreg);
+
+  supply_register (3, (char *) &pcb->pcb_ebx);
+  supply_register (SP_REGNUM, (char *) &pcb->pcb_esp);
+  supply_register (FP_REGNUM, (char *) &pcb->pcb_ebp);
+  supply_register (6, (char *) &pcb->pcb_esi);
+  supply_register (7, (char *) &pcb->pcb_edi);
+  supply_register (PC_REGNUM, (char *) &pcb->pcb_eip);
+
+  for (i = 9; i < 14; ++i)		/* eflags, cs, ss, ds, es, fs */
+    supply_register (i, (char *) &noreg);
+  supply_register (15, (char *) &pcb->pcb_gs);
+
+  /* XXX 80387 registers?  */
+}
+
+#endif /* __i386__ */
+
+#ifdef __sparc64__
+
+#define	SPARC_INTREG_SIZE	8
+
+static void
+fetch_kcore_registers (struct pcb *pcbp)
+{
+  static struct frame top;
+  CORE_ADDR f_addr;
+  int i;
+
+  /* Get the register values out of the sys pcb and store them where
+     `read_register' will find them.  */
+  /*
+   * XXX many registers aren't available.
+   * XXX for the non-core case, the registers are stale - they are for
+   *     the last context switch to the debugger.
+   * XXX do something with the floating-point registers?
+   */
+  supply_register (SP_REGNUM, &pcbp->pcb_fp);
+  supply_register (PC_REGNUM, &pcbp->pcb_pc);
+  f_addr = extract_address (&pcbp->pcb_fp, SPARC_INTREG_SIZE);
+  /* Load the previous frame by hand (XXX) and supply it. */
+  read_memory (f_addr + SPOFF, (char *)&top, sizeof (top));
+  for (i = 0; i < 8; i++)
+    supply_register (i + L0_REGNUM, &top.fr_local[i]);
+  for (i = 0; i < 8; i++)
+    supply_register (i + I0_REGNUM, &top.fr_in[i]);
+}
+
+CORE_ADDR
+fbsd_kern_frame_saved_pc (struct frame_info *fi)
+{
+  struct minimal_symbol *sym;
+  CORE_ADDR frame, pc_addr, pc;
+  char *buf;
+
+  buf = alloca (MAX_REGISTER_RAW_SIZE);
+  /* XXX: duplicates fi->extra_info->bottom. */
+  frame = (fi->next != NULL) ? fi->next->frame : read_sp ();
+  pc_addr = frame + offsetof (struct frame, fr_in[7]);
+
+#define	READ_PC(pc, a, b) do { \
+  read_memory (a, b, SPARC_INTREG_SIZE); \
+  pc = extract_address (b, SPARC_INTREG_SIZE); \
+} while (0)
+
+  READ_PC (pc, pc_addr, buf);
+
+  sym = lookup_minimal_symbol_by_pc (pc);
+  if (sym != NULL)
+    {
+      if (strncmp (SYMBOL_NAME (sym), "tl0_", 4) == 0 ||
+	  strcmp (SYMBOL_NAME (sym), "btext") == 0 ||
+	  strcmp (SYMBOL_NAME (sym), "mp_startup") == 0 ||
+	  strcmp (SYMBOL_NAME (sym), "fork_trampoline") == 0)
+        {
+	  /*
+	   * Ugly kluge: user space addresses aren't separated from kernel
+	   * ones by range; if encountering a trap from user space, just
+	   * return a 0 to stop the trace.
+	   * Do the same for entry points of kernel processes to avoid
+	   * printing garbage.
+	   */
+	  pc = 0;
+        }
+      if (strncmp (SYMBOL_NAME (sym), "tl1_", 4) == 0)
+        {
+          pc_addr = fi->frame + sizeof (struct frame) +
+	    offsetof (struct trapframe, tf_tpc);
+          READ_PC (pc, pc_addr, buf);
+	}
+    }
+  return (pc);
+}
+
+#endif /* __sparc64__ */
+
+/* Get the registers out of a core file.  This is the machine-
+   independent part.  Fetch_core_registers is the machine-dependent
+   part, typically implemented in the xm-file for each architecture.  */
+
+/* We just get all the registers, so we don't use regno.  */
+
+/* ARGSUSED */
+static void
+get_kcore_registers (int regno)
+{
+
+  /* XXX - Only read the pcb when set_context() is called.
+     When looking at a live kernel this may be a problem,
+     but the user can do another "proc" or "pcb" command to
+     grab a new copy of the pcb...  */
+
+  /* Zero out register set then fill in the ones we know about.  */
+  fetch_kcore_registers (&cur_pcb);
+}
+
+static void
+kcore_files_info (t)
+  struct target_ops *t;
+{
+  printf_filtered ("\t`%s'\n", core_file);
+}
+
+/* If mourn is being called in all the right places, this could be say
+   `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
+
+static int
+ignore (CORE_ADDR addr, char *contents)
+{
+  return 0;
+}
+
+static int
+xfer_kmem (CORE_ADDR memaddr, char *myaddr, int len, int write,
+	   struct mem_attrib *attrib, struct target_ops *target)
+{
+  int n;
+
+
+  if (!INKERNEL (memaddr))
+    return xfer_umem (memaddr, myaddr, len, write);
+
+  if (core_kd == NULL)
+    return 0;
+
+  if (write)
+    n = kvm_write (core_kd, memaddr, myaddr, len);
+  else
+    n = kvm_read (core_kd, memaddr, myaddr, len) ;
+  if (n < 0) {
+    fprintf_unfiltered (gdb_stderr, "can not access 0x%x, %s\n",
+			memaddr, kvm_geterr (core_kd));
+    n = 0;
+  }
+
+  return n;
+}
+
+
+static int
+xfer_umem (CORE_ADDR memaddr, char *myaddr, int len, int write /* ignored */)
+{
+  int n = 0;
+
+  if (cur_proc == 0)
+    {
+      error ("---Can't read userspace from dump, or kernel process---\n");
+      return 0;
+    }
+
+  if (write)
+    error ("kvm_uwrite unimplemented\n");
+  else
+    n = kvm_uread (core_kd, cur_proc, memaddr, myaddr, len) ;
+
+  if (n < 0)
+    return 0;
+
+  return n;
+}
+
+static void
+set_proc_cmd (char *arg, int from_tty)
+{
+  CORE_ADDR addr, pid_addr, first_td;
+  void *val;
+  struct kinfo_proc *kp;
+  int cnt;
+  pid_t pid;
+
+  if (!arg)
+    error_no_arg ("proc address for the new context");
+
+  if (core_kd == NULL)
+    error ("no kernel core file");
+
+  addr = (CORE_ADDR) parse_and_eval_address (arg);
+  
+  if (!INKERNEL (addr))
+    {
+      kp = kvm_getprocs (core_kd, KERN_PROC_PID, addr, &cnt);
+      if (!cnt)
+	error ("invalid pid");	  
+      addr = (CORE_ADDR)kp->ki_paddr;
+      cur_proc = kp;
+    }
+  else
+    {
+      /* Update cur_proc.  */
+      pid_addr = addr + offsetof (struct proc, p_pid);
+      if (kvread (pid_addr, &pid))
+	error ("cannot read pid ptr");
+      cur_proc = kvm_getprocs (core_kd, KERN_PROC_PID, pid, &cnt);
+      if (!cnt)
+	error("invalid pid");	  
+    }
+
+  /* Find the first thread in the process.  XXXKSE  */
+  addr += offsetof (struct proc, p_threads.tqh_first);
+  if (kvread (addr, &first_td))
+    error ("cannot read thread ptr");
+
+  /* Read the PCB address in thread structure. */
+  addr = first_td + offsetof (struct thread, td_pcb);
+  if (kvread (addr, &val))
+    error("cannot read pcb ptr");
+
+  /* Read the PCB address in proc structure. */
+  if (set_context ((CORE_ADDR) val))
+    error ("invalid proc address");
+}
+#else
+int kernel_debugging = 0;
+int kernel_writablecore = 0;
+
+CORE_ADDR
+fbsd_kern_frame_saved_pc (struct frame_info *fi)
+{
+  return 0;
+}
+#endif
+
+void
+_initialize_kcorelow (void)
+{
+#if __FreeBSD_version >= 500032
+  kcore_ops.to_shortname = "kcore";
+  kcore_ops.to_longname = "Kernel core dump file";
+  kcore_ops.to_doc =
+    "Use a core file as a target.  Specify the filename of the core file.";
+  kcore_ops.to_open = kcore_open;
+  kcore_ops.to_close = kcore_close;
+  kcore_ops.to_attach = find_default_attach;
+  kcore_ops.to_detach = kcore_detach;
+  kcore_ops.to_fetch_registers = get_kcore_registers;
+  kcore_ops.to_xfer_memory = xfer_kmem;
+  kcore_ops.to_files_info = kcore_files_info;
+  kcore_ops.to_create_inferior = find_default_create_inferior;
+  kcore_ops.to_stratum = kcore_stratum;
+  kcore_ops.to_has_memory = 1;
+  kcore_ops.to_has_stack = 1;
+  kcore_ops.to_has_registers = 1;
+  kcore_ops.to_magic = OPS_MAGIC;
+
+  add_target (&kcore_ops);
+  add_com ("proc", class_obscure, set_proc_cmd, "Set current process context");
+#endif
+}