Update to the 2004-05-11 snapshot.

Also enable kgdb and thread support!
This is missing IA64 support, and the AMD64 kgdb support is hokey and needs
a few more bits filled in.

1 files changed, 0 insertions, 759 deletions

diff --git a/devel/gdb66/files/patch-kvm-fbsd.c b/devel/gdb66/files/patch-kvm-fbsd.c
deleted file mode 100644
index 7259fd149bed..000000000000
--- a/devel/gdb66/files/patch-kvm-fbsd.c
+++ /dev/null
@@ -1,759 +0,0 @@
---- 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/gdb66/files/Attic/patch-kvm-fbsd.c,v 1.5 2003-04-08 08:37:55 jake 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_sp);
-+  supply_register (PC_REGNUM, &pcbp->pcb_pc);
-+  f_addr = extract_address (&pcbp->pcb_sp, 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
-+}