- Add support for specifying expressions in add-symbol-file (Nick Hibma)

- Add patches from src/ bits for:
  - kernel core debugging for i386
  - thread debugging for i386 and alpha (Doug Rabson)

This patch allows debugging -current kernels compiled with gcc-3.1.

Reviewed by:	dfr
Approved by:	obrien

11 files changed, 2165 insertions, 0 deletions

diff --git a/devel/gdb53/Makefile b/devel/gdb53/Makefile
index 546e0ca59bf3..01a7b3eff042 100644
--- a/devel/gdb53/Makefile
+++ b/devel/gdb53/Makefile
@@ -8,6 +8,7 @@
 
 PORTNAME=	gdb
 PORTVERSION=	5.2
+PORTREVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	${MASTER_SITE_SOURCEWARE}
 MASTER_SITE_SUBDIR=	gdb/releases
diff --git a/devel/gdb53/files/patch-gdb_config_alpha_fbsd.mh b/devel/gdb53/files/patch-gdb_config_alpha_fbsd.mh
new file mode 100644
index 000000000000..eb54ae56a740
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_config_alpha_fbsd.mh
@@ -0,0 +1,9 @@
+--- gdb/config/alpha/fbsd.mh	Sat Jan 19 17:12:50 2002
++++ config/alpha/fbsd.mh	Mon Jun  3 08:03:39 2002
+@@ -1,5 +1,5 @@
+ # Host: FreeBSD/Alpha
+ NATDEPFILES= fork-child.o infptrace.o inftarg.o \
+ 	solib.o solib-svr4.o solib-legacy.o \
+-	corelow.o core-regset.o alphabsd-nat.o
++	corelow.o core-regset.o alphabsd-nat.o freebsd-uthread.o
+ NAT_FILE= nm-fbsd.h
diff --git a/devel/gdb53/files/patch-gdb_config_i386_fbsd.mh b/devel/gdb53/files/patch-gdb_config_i386_fbsd.mh
new file mode 100644
index 000000000000..252505993248
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_config_i386_fbsd.mh
@@ -0,0 +1,8 @@
+--- gdb/config/i386/fbsd.mh	Thu Jan 17 20:50:59 2002
++++ gdb/config/i386/fbsd.mh	Mon May 27 18:36:20 2002
+@@ -4,4 +4,4 @@
+ 
+ NAT_FILE= nm-fbsd.h
+ # NOTE: Do not spread NATDEPFILES over several lines - it hurts BSD make.
+-NATDEPFILES= fork-child.o infptrace.o inftarg.o solib.o solib-svr4.o solib-legacy.o corelow.o core-aout.o core-regset.o i386-nat.o i387-nat.o i386bsd-nat.o i386fbsd-nat.o
++NATDEPFILES= fork-child.o infptrace.o inftarg.o solib.o solib-svr4.o solib-legacy.o corelow.o core-aout.o core-regset.o i386-nat.o i387-nat.o i386bsd-nat.o i386fbsd-nat.o kvm-fbsd.o freebsd-uthread.o
diff --git a/devel/gdb53/files/patch-gdb_config_i386_nm-fbsd.h b/devel/gdb53/files/patch-gdb_config_i386_nm-fbsd.h
new file mode 100644
index 000000000000..89f12b9728a1
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_config_i386_nm-fbsd.h
@@ -0,0 +1,46 @@
+--- gdb/config/i386/nm-fbsd.h	Sat Jul 21 13:16:44 2001
++++ gdb/config/i386/nm-fbsd.h	Mon Jun  3 10:04:54 2002
+@@ -28,6 +28,10 @@
+ 
+ #include "i386/nm-i386.h"
+ 
++#ifndef _SYS_PARAM_H_
++#include <sys/param.h>
++#endif
++
+ /* Provide access to the i386 hardware debugging registers.  */
+ 
+ #define I386_DR_LOW_SET_CONTROL(control) \
+@@ -148,5 +152,32 @@
+ #define ld_2		d_sdt
+ 
+ #endif /* !SVR4_SHARED_LIBS */
++
++extern int kernel_debugging;
++extern int kernel_writablecore;
++
++#if __FreeBSD_version >= 500032
++#define ADDITIONAL_OPTIONS \
++       {"kernel", no_argument, &kernel_debugging, 1}, \
++       {"k", no_argument, &kernel_debugging, 1}, \
++       {"wcore", no_argument, &kernel_writablecore, 1}, \
++       {"w", no_argument, &kernel_writablecore, 1},
++
++#define ADDITIONAL_OPTION_HELP \
++       "\
++  --kernel           Enable kernel debugging.\n\
++  --wcore            Make core file writable (only works for /dev/mem).\n\
++                     This option only works while debugging a kernel !!\n\
++"
++
++#define DEFAULT_PROMPT kernel_debugging?"(kgdb) ":"(gdb) "
++
++/* misuse START_PROGRESS to test whether we're running as kgdb */   
++/* START_PROGRESS is called at the top of main */
++#undef START_PROGRESS
++#define START_PROGRESS(STR,N) \
++  if (!strcmp(STR, "kgdb")) \
++     kernel_debugging = 1;
++#endif
+ 
+ #endif /* NM_FBSD_H */
diff --git a/devel/gdb53/files/patch-gdb_config_i386_tm-fbsd.h b/devel/gdb53/files/patch-gdb_config_i386_tm-fbsd.h
new file mode 100644
index 000000000000..3013085bb6f7
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_config_i386_tm-fbsd.h
@@ -0,0 +1,80 @@
+--- gdb/config/i386/tm-fbsd.h	Sat Jul 28 10:03:38 2001
++++ gdb/config/i386/tm-fbsd.h	Mon Jun  3 10:08:22 2002
+@@ -24,6 +24,10 @@
+ #define HAVE_I387_REGS
+ #include "i386/tm-i386.h"
+ 
++#ifndef _SYS_PARAM_H_
++#include <sys/param.h>
++#endif
++
+ /* FreeBSD/ELF uses stabs-in-ELF with the DWARF register numbering
+    scheme by default, so we must redefine STAB_REG_TO_REGNUM.  This
+    messes up the floating-point registers for a.out, but there is not
+@@ -41,38 +45,44 @@
+ /* Support for longjmp.  */
+ 
+ /* Details about jmp_buf.  It's supposed to be an array of integers.  */
+-
+-#define JB_ELEMENT_SIZE 4	/* Size of elements in jmp_buf.  */
+-#define JB_PC		0	/* Array index of saved PC.  */
+-
+-/* Figure out where the longjmp will land.  Store the address that
+-   longjmp will jump to in *ADDR, and return non-zero if successful.  */
+-
++#undef NUM_REGS
++#define NUM_REGS 16
+ #define GET_LONGJMP_TARGET(addr) get_longjmp_target (addr)
+-extern int get_longjmp_target (CORE_ADDR *addr);
+ 
+ 
+-/* Support for signal handlers.  */
++/* On FreeBSD, sigtramp has size 0x18 and is immediately below the
++   ps_strings struct which has size 0x10 and is at the top of the
++   user stack.  */
++
++#undef SIGTRAMP_START
++#undef SIGTRAMP_END
++#define SIGTRAMP_START(pc)    0xbfbfdfd8
++#define SIGTRAMP_END(pc)      0xbfbfdff0
+ 
+-#define IN_SIGTRAMP(pc, name) i386bsd_in_sigtramp (pc, name)
+-extern int i386bsd_in_sigtramp (CORE_ADDR pc, char *name);
+-
+-/* These defines allow the recognition of sigtramps as a function name
+-   <sigtramp>.
+-
+-   FIXME: kettenis/2001-07-13: These should be added to the target
+-   vector and turned into functions when we go "multi-arch".  */
+-
+-#define SIGTRAMP_START(pc) i386bsd_sigtramp_start
+-#define SIGTRAMP_END(pc) i386bsd_sigtramp_end
+ extern CORE_ADDR i386bsd_sigtramp_start;
+ extern CORE_ADDR i386bsd_sigtramp_end;
++extern CORE_ADDR fbsd_kern_frame_saved_pc(struct frame_info *fr);
+ 
+ /* Override FRAME_SAVED_PC to enable the recognition of signal handlers.  */
+ 
+ #undef FRAME_SAVED_PC
+-#define FRAME_SAVED_PC(frame) i386bsd_frame_saved_pc (frame)
+-extern CORE_ADDR i386bsd_frame_saved_pc (struct frame_info *frame);
++#if __FreeBSD_version >= 500032
++#define FRAME_SAVED_PC(FRAME) \
++  (kernel_debugging ? fbsd_kern_frame_saved_pc(FRAME) : \
++  (((FRAME)->signal_handler_caller \
++    ? sigtramp_saved_pc (FRAME) \
++    : read_memory_integer ((FRAME)->frame + 4, 4)) \
++   ))
++#else
++#define FRAME_SAVED_PC(FRAME) \
++  (((FRAME)->signal_handler_caller \
++    ? sigtramp_saved_pc (FRAME) \
++    : read_memory_integer ((FRAME)->frame + 4, 4)) \
++   )
++#endif
++
++/* Offset to saved PC in sigcontext, from <sys/signal.h>.  */
++#define SIGCONTEXT_PC_OFFSET 20
+ 
+ 
+ /* Shared library support.  */
diff --git a/devel/gdb53/files/patch-gdb_freebsd-uthread.c b/devel/gdb53/files/patch-gdb_freebsd-uthread.c
new file mode 100644
index 000000000000..9b4d3b68575a
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_freebsd-uthread.c
@@ -0,0 +1,922 @@
+
+$FreeBSD$
+
+--- gdb/freebsd-uthread.c.orig	Sat May 25 13:05:56 2002
++++ gdb/freebsd-uthread.c	Sat May 25 13:09:09 2002
+@@ -0,0 +1,915 @@
++/* $FreeBSD$ */
++/* Low level interface for debugging FreeBSD user threads for GDB, the GNU debugger.
++   Copyright 1996, 1999 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.  */
++
++/* This module implements a sort of half target that sits between the
++   machine-independent parts of GDB and the ptrace interface (infptrace.c) to
++   provide access to the FreeBSD user-mode thread implementation.
++
++   FreeBSD threads are true user-mode threads, which are invoked via
++   the pthread_* interfaces.  These are mostly implemented in
++   user-space, with all thread context kept in various structures that
++   live in the user's heap.  For the most part, the kernel has no
++   knowlege of these threads.
++
++   Based largely on hpux-thread.c
++
++   */
++
++
++#include "defs.h"
++#include <sys/queue.h>
++#include <signal.h>
++#include <setjmp.h>
++#include "gdbthread.h"
++#include "target.h"
++#include "inferior.h"
++#include <fcntl.h>
++#include <ucontext.h>
++#include <unistd.h>
++#include <sys/stat.h>
++#include "gdbcore.h"
++
++extern int child_suppress_run;
++extern struct target_ops child_ops; /* target vector for inftarg.c */
++
++extern void _initialize_freebsd_uthread PARAMS ((void));
++
++/* Set to true while we are part-way through attaching */
++static int freebsd_uthread_attaching;
++
++static int freebsd_uthread_active = 0;
++static CORE_ADDR P_thread_list;
++static CORE_ADDR P_thread_run;
++
++/* Pointer to the next function on the objfile event chain.  */
++static void (*target_new_objfile_chain) (struct objfile *objfile);
++
++static void freebsd_uthread_resume PARAMS ((ptid_t pid, int step,
++					enum target_signal signo));
++
++static void init_freebsd_uthread_ops PARAMS ((void));
++
++static struct target_ops freebsd_uthread_ops;
++
++static ptid_t find_active_ptid PARAMS ((void));
++
++struct cached_pthread {
++  u_int64_t		uniqueid;
++  int			state;
++  CORE_ADDR		name;
++  union {
++    ucontext_t	uc;
++    jmp_buf	jb;
++  }			ctx;
++};
++
++static ptid_t cached_ptid;
++static struct cached_pthread cached_pthread;
++static CORE_ADDR cached_pthread_addr;
++
++LIST_HEAD(idmaplist, idmap);
++
++struct idmap {
++    LIST_ENTRY(idmap)	link;
++    u_int64_t		uniqueid;
++    int			tid;
++};
++
++#define MAPHASH_SIZE	257
++#define TID_MIN		1
++#define TID_MAX		16383
++
++static int tid_to_hash[TID_MAX + 1];		/* set to map_hash index */
++static struct idmaplist map_hash[MAPHASH_SIZE];
++static int next_free_tid = TID_MIN;		/* first available tid */
++static int last_free_tid = TID_MIN;		/* first unavailable */
++
++static CORE_ADDR P_thread_next_offset;
++static CORE_ADDR P_thread_uniqueid_offset;
++static CORE_ADDR P_thread_state_offset;
++static CORE_ADDR P_thread_name_offset;
++static CORE_ADDR P_thread_ctx_offset;
++static CORE_ADDR P_thread_PS_RUNNING_value;
++static CORE_ADDR P_thread_PS_DEAD_value;
++
++static int next_offset;
++static int uniqueid_offset;
++static int state_offset;
++static int name_offset;
++static int ctx_offset;
++static int PS_RUNNING_value;
++static int PS_DEAD_value;
++
++#define UNIQUEID_HASH(id)	(id % MAPHASH_SIZE)
++#define TID_ADD1(tid)		(((tid) + 1) == TID_MAX + 1 \
++				 ? TID_MIN : (tid) + 1)
++#define IS_TID_FREE(tid)	(tid_to_hash[tid] == -1)
++
++static int
++get_new_tid(int h)
++{
++  int tid = next_free_tid;
++
++  tid_to_hash[tid] = h;
++  next_free_tid = TID_ADD1(next_free_tid);
++  if (next_free_tid == last_free_tid)
++    {
++      int i;
++
++      for (i = last_free_tid; TID_ADD1(i) != last_free_tid; i = TID_ADD1(i))
++	if (IS_TID_FREE(i))
++	  break;
++      if (TID_ADD1(i) == last_free_tid)
++	{
++	  error("too many threads");
++	  return 0;
++	}
++      next_free_tid = i;
++      for (i = TID_ADD1(i); IS_TID_FREE(i); i = TID_ADD1(i))
++	;
++      last_free_tid = i;
++    }
++
++  return tid;
++}
++
++static ptid_t
++find_ptid(u_int64_t uniqueid)
++{
++  int h = UNIQUEID_HASH(uniqueid);
++  struct idmap *im;
++
++  LIST_FOREACH(im, &map_hash[h], link)
++    if (im->uniqueid == uniqueid)
++    return MERGEPID(PIDGET(inferior_ptid), im->tid);
++
++  im = xmalloc(sizeof(struct idmap));
++  im->uniqueid = uniqueid;
++  im->tid = get_new_tid(h);
++  LIST_INSERT_HEAD(&map_hash[h], im, link);
++
++  return MERGEPID(PIDGET(inferior_ptid), im->tid);
++}
++
++static void
++free_ptid(ptid_t ptid)
++{
++  int tid = TIDGET(ptid);
++  int h = tid_to_hash[tid];
++  struct idmap *im;
++
++  if (!tid) return;
++
++  LIST_FOREACH(im, &map_hash[h], link)
++    if (im->tid == tid)
++      break;
++
++  if (!im) return;
++
++  LIST_REMOVE(im, link);
++  tid_to_hash[tid] = -1;
++  free(im);
++}
++
++#define READ_OFFSET(field) read_memory(P_thread_##field##_offset,	\
++				       (char *) &field##_offset,	\
++				       sizeof(field##_offset))
++
++#define READ_VALUE(name) read_memory(P_thread_##name##_value,	\
++				     (char *) &name##_value,	\
++				     sizeof(name##_value))
++
++static void
++read_thread_offsets (void)
++{
++  READ_OFFSET(next);
++  READ_OFFSET(uniqueid);
++  READ_OFFSET(state);
++  READ_OFFSET(name);
++  READ_OFFSET(ctx);
++
++  READ_VALUE(PS_RUNNING);
++  READ_VALUE(PS_DEAD);
++}
++
++#define READ_FIELD(ptr, T, field, result) \
++  read_memory ((ptr) + field##_offset, (char *) &(result), sizeof result)
++
++static u_int64_t
++read_pthread_uniqueid (CORE_ADDR ptr)
++{
++  u_int64_t uniqueid;
++  READ_FIELD(ptr, u_int64_t, uniqueid, uniqueid);
++  return uniqueid;
++}
++
++static CORE_ADDR
++read_pthread_next (CORE_ADDR ptr)
++{
++  CORE_ADDR next;
++  READ_FIELD(ptr, CORE_ADDR, next, next);
++  return next;
++}
++
++static void
++read_cached_pthread (CORE_ADDR ptr, struct cached_pthread *cache)
++{
++  READ_FIELD(ptr, u_int64_t,	uniqueid,	cache->uniqueid);
++  READ_FIELD(ptr, int,		state,		cache->state);
++  READ_FIELD(ptr, CORE_ADDR,	name,		cache->name);
++  READ_FIELD(ptr, ucontext_t,	ctx,		cache->ctx);
++}
++
++static ptid_t
++find_active_ptid (void)
++{
++  CORE_ADDR ptr;
++
++  read_memory ((CORE_ADDR)P_thread_run,
++	       (char *)&ptr,
++	       sizeof ptr);
++
++  return find_ptid(read_pthread_uniqueid(ptr));
++}
++
++static CORE_ADDR find_pthread_addr PARAMS ((ptid_t ptid));
++static struct cached_pthread * find_pthread PARAMS ((ptid_t ptid));
++
++static CORE_ADDR
++find_pthread_addr (ptid_t ptid)
++{
++  CORE_ADDR ptr;
++
++  if (ptid_equal(ptid, cached_ptid))
++    return cached_pthread_addr;
++
++  read_memory ((CORE_ADDR)P_thread_list,
++	       (char *)&ptr,
++	       sizeof ptr);
++
++  while (ptr != 0)
++    {
++      if (ptid_equal(find_ptid(read_pthread_uniqueid(ptr)), ptid))
++	{
++	  cached_ptid = ptid;
++	  cached_pthread_addr = ptr;
++	  read_cached_pthread(ptr, &cached_pthread);
++	  return ptr;
++	}
++      ptr = read_pthread_next(ptr);
++    }
++
++  return NULL;
++}
++
++static struct cached_pthread *
++find_pthread (ptid_t ptid)
++{
++  CORE_ADDR ptr;
++
++  if (ptid_equal(ptid, cached_ptid))
++    return &cached_pthread;
++
++  read_memory ((CORE_ADDR)P_thread_list,
++	       (char *)&ptr,
++	       sizeof ptr);
++
++  while (ptr != 0)
++    {
++      if (ptid_equal(find_ptid(read_pthread_uniqueid(ptr)), ptid))
++	{
++	  cached_ptid = ptid;
++	  cached_pthread_addr = ptr;
++	  read_cached_pthread(ptr, &cached_pthread);
++	  return &cached_pthread;
++	}
++      ptr = read_pthread_next(ptr);
++    }
++
++#if 0
++  error ("Can't find pthread %d,%d", PIDGET(ptid), TIDGET(ptid));
++#endif
++  return NULL;
++}
++
++
++/* Most target vector functions from here on actually just pass through to
++   inftarg.c, as they don't need to do anything specific for threads.  */
++
++/* ARGSUSED */
++static void
++freebsd_uthread_open (char *arg, int from_tty)
++{
++  child_ops.to_open (arg, from_tty);
++}
++
++/* Attach to process PID, then initialize for debugging it
++   and wait for the trace-trap that results from attaching.  */
++
++static void
++freebsd_uthread_attach (char *args, int from_tty)
++{
++  child_ops.to_attach (args, from_tty);
++  push_target (&freebsd_uthread_ops);
++  freebsd_uthread_attaching = 1;
++}
++
++/* After an attach, see if the target is threaded */
++
++static void
++freebsd_uthread_post_attach (int pid)
++{
++  if (freebsd_uthread_active)
++    {
++      read_thread_offsets ();
++      inferior_ptid = find_active_ptid ();
++      add_thread (inferior_ptid);
++    }
++  else
++    {
++      unpush_target (&freebsd_uthread_ops);
++      push_target (&child_ops);
++    }
++
++  freebsd_uthread_attaching = 0;
++}
++
++/* Take a program previously attached to and detaches it.
++   The program resumes execution and will no longer stop
++   on signals, etc.  We'd better not have left any breakpoints
++   in the program or it'll die when it hits one.  For this
++   to work, it may be necessary for the process to have been
++   previously attached.  It *might* work if the program was
++   started via the normal ptrace (PTRACE_TRACEME).  */
++
++static void
++freebsd_uthread_detach (char *args, int from_tty)
++{
++  child_ops.to_detach (args, from_tty);
++}
++
++/* Resume execution of process PID.  If STEP is nozero, then
++   just single step it.  If SIGNAL is nonzero, restart it with that
++   signal activated.  We may have to convert pid from a thread-id to an LWP id
++   for procfs.  */
++
++static void
++freebsd_uthread_resume (ptid_t ptid, int step, enum target_signal signo)
++{
++  if (freebsd_uthread_attaching)
++    {
++      child_ops.to_resume (ptid, step, signo);
++      return;
++    }
++
++  child_ops.to_resume (ptid, step, signo);
++  cached_ptid = MERGEPID(0, 0);
++}
++
++/* Wait for any threads to stop.  We may have to convert PID from a thread id
++   to a LWP id, and vice versa on the way out.  */
++
++static ptid_t
++freebsd_uthread_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
++{
++  ptid_t rtnval;
++
++  if (freebsd_uthread_attaching)
++    {
++      return child_ops.to_wait (ptid, ourstatus);
++    }
++
++  rtnval = child_ops.to_wait (ptid, ourstatus);
++
++  if (PIDGET(rtnval) >= 0)
++    {
++      rtnval = find_active_ptid ();
++      if (!in_thread_list (rtnval))
++	add_thread (rtnval);
++    }
++
++  return rtnval;
++}
++
++#ifdef __i386__
++
++static char sigmap[MAX_NUM_REGS] = /* map reg to sigcontext  */
++{
++  12,				/* eax */
++  11,				/* ecx */
++  10,				/* edx */
++  9,				/* ebx */
++  8,				/* esp */
++  7,				/* ebp */
++  6,				/* esi */
++  5,				/* edi */
++  15,				/* eip */
++  17,				/* eflags */
++  16,				/* cs */
++  19,				/* ss */
++  4,				/* ds */
++  3,				/* es */
++  2,				/* fs */
++  1,				/* gs */
++  -1, -1, -1, -1, -1, -1, -1,	/* st0-st7 */
++  -1, -1, -1, -1, -1, -1, -1,	/* fctrl-fop */
++  -1, -1, -1, -1, -1, -1, -1,	/* xmm0-xmm7 */
++  -1,				/* mxcsr */
++};
++
++static char jmpmap[MAX_NUM_REGS] = /* map reg to jmp_buf */
++{
++  6,				/* eax */
++  -1,				/* ecx */
++  -1,				/* edx */
++  1,				/* ebx */
++  2,				/* esp */
++  3,				/* ebp */
++  4,				/* esi */
++  5,				/* edi */
++  0,				/* eip */
++  -1,				/* eflags */
++  -1,				/* cs */
++  -1,				/* ss */
++  -1,				/* ds */
++  -1,				/* es */
++  -1,				/* fs */
++  -1,				/* gs */
++  -1, -1, -1, -1, -1, -1, -1,	/* st0-st7 */
++  -1, -1, -1, -1, -1, -1, -1,	/* fctrl-fop */
++  -1, -1, -1, -1, -1, -1, -1,	/* xmm0-xmm7 */
++  -1,				/* mxcsr */
++};
++
++#endif
++
++#ifdef __alpha__
++
++static char sigmap[NUM_REGS] =	/* map reg to sigcontext  */
++{
++  1,  2,  3,  4,  5,  6,  7,  8,  /* v0 - t6 */
++  9,  10, 11, 12, 13, 14, 15, 16, /* t7 - fp */
++  17, 18, 19, 20, 21, 22, 23, 24, /* a0 - t9 */
++  25, 26, 27, 28, 29, 30, 31, 32, /* t10 - zero */
++  38, 39, 40, 41, 42, 43, 44, 45, /* f0 - f7 */
++  46, 47, 48, 49, 50, 51, 52, 53, /* f8 - f15 */
++  54, 55, 56, 57, 58, 59, 60, 61, /* f16 - f23 */
++  62, 63, 64, 65, 66, 67, 68, 69, /* f24 - f31 */
++  33, -1			  /* pc, vfp */
++};
++static char jmpmap[NUM_REGS] = {
++  4,  5,  6,  7,  8,  9,  10, 11, /* v0 - t6 */
++  12, 13, 14, 15, 16, 17, 18, 19, /* t7 - fp */
++  20, 21, 22, 23, 24, 25, 26, 27, /* a0 - t9 */
++  28, 29, 30, 31, 32, 33, 34, 35, /* t10 - zero */
++  37, 38, 39, 40, 41, 42, 43, 44, /* f0 - f7 */
++  45, 46, 47, 48, 49, 50, 51, 52, /* f8 - f15 */
++  53, 54, 55, 56, 57, 58, 59, 60, /* f16 - f23 */
++  61, 62, 63, 64, 65, 66, 67, 68, /* f24 - f31 */
++  2,  -1,			  /* pc, vfp */
++};
++
++#endif
++
++static void
++freebsd_uthread_fetch_registers (int regno)
++{
++  struct cached_pthread *thread;
++  int active;
++  int first_regno, last_regno;
++  register_t *regbase;
++  char *regmap;
++
++  if (freebsd_uthread_attaching || TIDGET(inferior_ptid) == 0)
++    {
++      child_ops.to_fetch_registers (regno);
++      return;
++    }
++
++  thread = find_pthread (inferior_ptid);
++  active = (ptid_equal(inferior_ptid, find_active_ptid()));
++
++  if (active)
++    {
++      child_ops.to_fetch_registers (regno);
++      return;
++    }
++
++  if (regno == -1)
++    {
++      first_regno = 0;
++      last_regno = NUM_REGS - 1;
++    }
++  else
++    {
++      first_regno = regno;
++      last_regno = regno;
++    }
++
++  regbase = (register_t*) &thread->ctx.jb[0];
++  regmap = jmpmap;
++
++  for (regno = first_regno; regno <= last_regno; regno++)
++    {
++      if (regmap[regno] == -1)
++	child_ops.to_fetch_registers (regno);
++      else
++	if (thread)
++	  supply_register (regno, (char*) &regbase[regmap[regno]]);
++	else
++	  supply_register (regno, NULL);
++    }
++}
++
++static void
++freebsd_uthread_store_registers (int regno)
++{
++  struct cached_pthread *thread;
++  CORE_ADDR ptr;
++  int first_regno, last_regno;
++  u_int32_t *regbase;
++  char *regmap;
++
++  if (freebsd_uthread_attaching)
++    {
++      child_ops.to_store_registers (regno);
++      return;
++    }
++
++  thread = find_pthread (inferior_ptid);
++
++  if (thread->state == PS_RUNNING_value)
++    {
++      child_ops.to_store_registers (regno);
++      return;
++    }
++
++  if (regno == -1)
++    {
++      first_regno = 0;
++      last_regno = NUM_REGS - 1;
++    }
++  else
++    {
++      first_regno = regno;
++      last_regno = regno;
++    }
++
++  regbase = (u_int32_t*) &thread->ctx.jb[0];
++  regmap = jmpmap;
++
++  ptr = find_pthread_addr (inferior_ptid);
++  for (regno = first_regno; regno <= last_regno; regno++)
++    {
++      if (regmap[regno] == -1)
++	child_ops.to_store_registers (regno);
++      else
++	{
++	  u_int32_t *reg = &regbase[regmap[regno]];
++	  int off;
++
++	  /* Hang onto cached value */
++	  memcpy(reg, registers + REGISTER_BYTE (regno),
++		 REGISTER_RAW_SIZE (regno));
++
++	  /* And push out to inferior */
++	  off = (char *) reg - (char *) thread;
++	  write_memory (ptr + off, 
++			registers + REGISTER_BYTE (regno),
++			REGISTER_RAW_SIZE (regno));
++	}
++    }
++}
++
++/* Get ready to modify the registers array.  On machines which store
++   individual registers, this doesn't need to do anything.  On machines
++   which store all the registers in one fell swoop, this makes sure
++   that registers contains all the registers from the program being
++   debugged.  */
++
++static void
++freebsd_uthread_prepare_to_store (void)
++{
++  child_ops.to_prepare_to_store ();
++}
++
++static int
++freebsd_uthread_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
++			     int dowrite, struct mem_attrib *attrib,
++			     struct target_ops *target)
++{
++  return child_ops.to_xfer_memory (memaddr, myaddr, len, dowrite,
++				   attrib, target);
++}
++
++/* Print status information about what we're accessing.  */
++
++static void
++freebsd_uthread_files_info (struct target_ops *ignore)
++{
++  child_ops.to_files_info (ignore);
++}
++
++static void
++freebsd_uthread_kill_inferior (void)
++{
++  child_ops.to_kill ();
++}
++
++static void
++freebsd_uthread_notice_signals (ptid_t ptid)
++{
++  child_ops.to_notice_signals (ptid);
++}
++
++/* Fork an inferior process, and start debugging it with /proc.  */
++
++static void
++freebsd_uthread_create_inferior (char *exec_file, char *allargs, char **env)
++{
++  child_ops.to_create_inferior (exec_file, allargs, env);
++
++  if (PIDGET(inferior_ptid) && freebsd_uthread_active)
++    {
++      read_thread_offsets ();
++      push_target (&freebsd_uthread_ops);
++      inferior_ptid = find_active_ptid ();
++      add_thread (inferior_ptid);
++    }
++}
++
++/* This routine is called to find out if the inferior is using threads.
++   We check for the _thread_run and _thread_list globals. */
++
++void
++freebsd_uthread_new_objfile (struct objfile *objfile)
++{
++  struct minimal_symbol *ms;
++
++  if (!objfile)
++    {
++      freebsd_uthread_active = 0;
++      return;
++    }
++
++  ms = lookup_minimal_symbol ("_thread_run", NULL, objfile);
++
++  if (!ms)
++    return;
++
++  P_thread_run = SYMBOL_VALUE_ADDRESS (ms);
++
++  ms = lookup_minimal_symbol ("_thread_list", NULL, objfile);
++
++  if (!ms)
++    return;
++
++  P_thread_list = SYMBOL_VALUE_ADDRESS (ms);
++
++#define OFFSET_SYM(field)	"_thread_" #field "_offset"
++#define LOOKUP_OFFSET(field)						\
++  do {									\
++      ms = lookup_minimal_symbol (OFFSET_SYM(field), NULL, objfile);	\
++      if (!ms)								\
++	return;								\
++      P_thread_##field##_offset = SYMBOL_VALUE_ADDRESS (ms);		\
++  } while (0);
++
++#define VALUE_SYM(name)		"_thread_" #name "_value"
++#define LOOKUP_VALUE(name)						\
++  do {									\
++       ms = lookup_minimal_symbol (VALUE_SYM(name), NULL, objfile);	\
++      if (!ms)								\
++	return;								\
++      P_thread_##name##_value = SYMBOL_VALUE_ADDRESS (ms);		\
++  } while (0);
++
++  LOOKUP_OFFSET(next);
++  LOOKUP_OFFSET(uniqueid);
++  LOOKUP_OFFSET(state);
++  LOOKUP_OFFSET(name);
++  LOOKUP_OFFSET(ctx);
++
++  LOOKUP_VALUE(PS_RUNNING);
++  LOOKUP_VALUE(PS_DEAD);
++
++  freebsd_uthread_active = 1;
++}
++
++/* Clean up after the inferior dies.  */
++
++static void
++freebsd_uthread_mourn_inferior ()
++{
++  child_ops.to_mourn_inferior ();
++  unpush_target (&freebsd_uthread_ops);
++}
++
++/* Mark our target-struct as eligible for stray "run" and "attach" commands.  */
++
++static int
++freebsd_uthread_can_run ()
++{
++  return child_suppress_run;
++}
++
++static int
++freebsd_uthread_thread_alive (ptid_t ptid)
++{
++  struct cached_pthread *thread;
++  int ret = 0;
++
++  if (freebsd_uthread_attaching)
++    return 1;
++
++  /*
++   * We can get called from child_ops.to_wait() which passes the underlying
++   * pid (without a thread number).
++   */
++  if (TIDGET(ptid) == 0)
++    return 1;
++
++  if (find_pthread_addr (ptid) != 0)
++    {
++      thread = find_pthread (ptid);
++      ret = (thread->state != PS_DEAD_value);
++    }
++
++  if (!ret)
++    free_ptid(ptid);
++
++  return ret;
++}
++
++static void
++freebsd_uthread_stop (void)
++{
++  child_ops.to_stop ();
++}
++
++static void
++freebsd_uthread_find_new_threads (void)
++{
++  CORE_ADDR ptr;
++  int state;
++  u_int64_t uniqueid;
++
++  read_memory ((CORE_ADDR)P_thread_list,
++	       (char *)&ptr,
++	       sizeof ptr);
++
++  while (ptr != 0)
++    {
++      READ_FIELD(ptr, int, state, state);
++      READ_FIELD(ptr, u_int64_t, uniqueid, uniqueid);
++      if (state != PS_DEAD_value &&
++	  !in_thread_list (find_ptid(uniqueid)))
++	add_thread (find_ptid(uniqueid));
++      ptr = read_pthread_next(ptr);
++    }
++}
++
++/* MUST MATCH enum pthread_state */
++static const char *statenames[] = {
++  "RUNNING",
++  "SIGTHREAD",
++  "MUTEX_WAIT",
++  "COND_WAIT",
++  "FDLR_WAIT",
++  "FDLW_WAIT",
++  "FDR_WAIT",
++  "FDW_WAIT",
++  "POLL_WAIT",
++  "FILE_WAIT",
++  "SELECT_WAIT",
++  "SLEEP_WAIT",
++  "WAIT_WAIT",
++  "SIGSUSPEND",
++  "SIGWAIT",
++  "SPINBLOCK",
++  "JOIN",
++  "SUSPENDED",
++  "DEAD",
++  "DEADLOCK",
++};
++
++#if 0
++
++static int
++freebsd_uthread_get_thread_info (ref, selection, info)
++     gdb_threadref *ref;
++     int selection;
++     struct gdb_ext_thread_info *info;
++{
++  int pid = *ref;
++  struct cached_pthread *thread = find_pthread (pid);
++  struct cleanup *old_chain;
++
++  old_chain = save_inferior_pid ();
++  inferior_pid = main_pid;
++
++  memset(&info->threadid, 0, OPAQUETHREADBYTES);
++
++  memcpy(&info->threadid, ref, sizeof *ref);
++  info->active = thread->state == PS_RUNNING_value;
++  strcpy(info->display, statenames[thread->state]);
++  if (thread->name)
++    read_memory ((CORE_ADDR) thread->name, info->shortname, 32);
++  else
++    strcpy(info->shortname, "");
++
++  do_cleanups (old_chain);
++  return (0);
++}
++
++#endif
++
++char *
++freebsd_uthread_pid_to_str (ptid_t ptid)
++{
++  static char buf[30];
++
++  if (STREQ (current_target.to_shortname, "freebsd-uthreads"))
++    sprintf (buf, "Process %d, Thread %ld",
++	     PIDGET(ptid), TIDGET(ptid));
++  else
++    sprintf (buf, "Process %d", PIDGET(ptid));
++
++  return buf;
++}
++
++
++static void
++init_freebsd_uthread_ops ()
++{
++  freebsd_uthread_ops.to_shortname = "freebsd-uthreads";
++  freebsd_uthread_ops.to_longname = "FreeBSD uthreads";
++  freebsd_uthread_ops.to_doc = "FreeBSD user threads support.";
++  freebsd_uthread_ops.to_open = freebsd_uthread_open;
++  freebsd_uthread_ops.to_attach = freebsd_uthread_attach;
++  freebsd_uthread_ops.to_post_attach = freebsd_uthread_post_attach;
++  freebsd_uthread_ops.to_detach = freebsd_uthread_detach;
++  freebsd_uthread_ops.to_resume = freebsd_uthread_resume;
++  freebsd_uthread_ops.to_wait = freebsd_uthread_wait;
++  freebsd_uthread_ops.to_fetch_registers = freebsd_uthread_fetch_registers;
++  freebsd_uthread_ops.to_store_registers = freebsd_uthread_store_registers;
++  freebsd_uthread_ops.to_prepare_to_store = freebsd_uthread_prepare_to_store;
++  freebsd_uthread_ops.to_xfer_memory = freebsd_uthread_xfer_memory;
++  freebsd_uthread_ops.to_files_info = freebsd_uthread_files_info;
++  freebsd_uthread_ops.to_insert_breakpoint = memory_insert_breakpoint;
++  freebsd_uthread_ops.to_remove_breakpoint = memory_remove_breakpoint;
++  freebsd_uthread_ops.to_terminal_init = terminal_init_inferior;
++  freebsd_uthread_ops.to_terminal_inferior = terminal_inferior;
++  freebsd_uthread_ops.to_terminal_ours_for_output = terminal_ours_for_output;
++  freebsd_uthread_ops.to_terminal_ours = terminal_ours;
++  freebsd_uthread_ops.to_terminal_info = child_terminal_info;
++  freebsd_uthread_ops.to_kill = freebsd_uthread_kill_inferior;
++  freebsd_uthread_ops.to_create_inferior = freebsd_uthread_create_inferior;
++  freebsd_uthread_ops.to_mourn_inferior = freebsd_uthread_mourn_inferior;
++  freebsd_uthread_ops.to_can_run = freebsd_uthread_can_run;
++  freebsd_uthread_ops.to_notice_signals = freebsd_uthread_notice_signals;
++  freebsd_uthread_ops.to_thread_alive = freebsd_uthread_thread_alive;
++  freebsd_uthread_ops.to_stop = freebsd_uthread_stop;
++  freebsd_uthread_ops.to_stratum = process_stratum;
++  freebsd_uthread_ops.to_has_all_memory = 1;
++  freebsd_uthread_ops.to_has_memory = 1;
++  freebsd_uthread_ops.to_has_stack = 1;
++  freebsd_uthread_ops.to_has_registers = 1;
++  freebsd_uthread_ops.to_has_execution = 1;
++  freebsd_uthread_ops.to_has_thread_control = 0;
++  freebsd_uthread_ops.to_magic = OPS_MAGIC;
++  freebsd_uthread_ops.to_find_new_threads = freebsd_uthread_find_new_threads;
++  freebsd_uthread_ops.to_pid_to_str = freebsd_uthread_pid_to_str;
++#if 0
++  freebsd_uthread_vec.get_thread_info = freebsd_uthread_get_thread_info;
++#endif
++}
++
++void
++_initialize_freebsd_uthread ()
++{
++  init_freebsd_uthread_ops ();
++  add_target (&freebsd_uthread_ops);
++
++  target_new_objfile_chain = target_new_objfile_hook;
++  target_new_objfile_hook = freebsd_uthread_new_objfile;
++
++  child_suppress_run = 1;
++}
+
diff --git a/devel/gdb53/files/patch-gdb_kvm-fbsd.c b/devel/gdb53/files/patch-gdb_kvm-fbsd.c
new file mode 100644
index 000000000000..60ca07998e40
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_kvm-fbsd.c
@@ -0,0 +1,1058 @@
+--- gdb/kvm-fbsd.c	Mon Jun  3 11:32:24 2002
++++ gdb/kvm-fbsd.c	Mon Jun  3 11:30:35 2002
+@@ -0,0 +1,1055 @@
++/* Live and postmortem kernel debugging functions for FreeBSD.
++   Copyright 1996 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/gdb53/files/Attic/patch-gdb_kvm-fbsd.c,v 1.1 2002-06-06 03:56:34 mp Exp $ */
++
++#include "defs.h"
++
++#include <ctype.h>
++#include <errno.h>
++#include <signal.h>
++#include <fcntl.h>
++#include <paths.h>
++#include <sys/sysctl.h>
++#include <sys/param.h>
++#include <sys/time.h>
++#include <sys/proc.h>
++#include <sys/user.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 <sys/stat.h>
++#include <unistd.h>
++#include <vm/vm.h>
++#include <vm/vm_param.h>
++
++#include <machine/vmparam.h>
++#include <machine/pcb.h>
++#include <machine/tss.h>
++#include <machine/frame.h>
++
++#if __FreeBSD_version >= 500032 && defined(i386)
++#define _KERNEL
++#include <sys/pcpu.h>
++#undef _KERNEL
++
++static void kcore_files_info PARAMS ((struct target_ops *));
++
++static void kcore_close PARAMS ((int));
++
++static void get_kcore_registers PARAMS ((int));
++
++static int kcore_xfer_kmem PARAMS ((CORE_ADDR, char *, int, int, struct mem_attrib *attrib, struct target_ops *));
++
++static int xfer_umem PARAMS ((CORE_ADDR, char *, int, int));
++
++static CORE_ADDR ksym_lookup PARAMS ((const char *));
++
++static int read_pcb PARAMS ((int, CORE_ADDR));
++
++static struct proc * curProc PARAMS ((void));
++
++static int set_proc_context PARAMS ((CORE_ADDR paddr));
++
++static void kcore_open PARAMS ((char *filename, int from_tty));
++
++static void kcore_detach PARAMS ((char *args, int from_tty));
++
++static void set_proc_cmd PARAMS ((char *arg, int from_tty));
++
++static void set_cpu_cmd PARAMS ((char *arg, int from_tty));
++
++static CORE_ADDR kvtophys PARAMS ((int, CORE_ADDR));
++
++static int physrd PARAMS ((int, u_int, char*, int));
++
++static int kvm_open PARAMS ((const char *efile, char *cfile, char *sfile,
++			     int perm, char *errout));
++
++static int kvm_close PARAMS ((int fd));
++
++static int kvm_write PARAMS ((int core_kd, CORE_ADDR memaddr,
++			      char *myaddr, int len));
++
++static int kvm_read PARAMS ((int core_kd, CORE_ADDR memaddr,
++			     char *myaddr, int len));
++
++static int kvm_uread PARAMS ((int core_kd, struct proc *p,
++			      CORE_ADDR memaddr, char *myaddr,
++			      int len));
++
++static int kernel_core_file_hook PARAMS ((int fd, CORE_ADDR addr,
++					  char *buf, int len));
++
++static CORE_ADDR kvm_getpcpu PARAMS ((int cfd, int cpuid));
++
++static struct kinfo_proc * kvm_getprocs PARAMS ((int cfd, int op,
++						CORE_ADDR proc, int *cnt));
++
++extern struct target_ops kcore_ops;	/* Forward decl */
++
++/* Non-zero means we are debugging a kernel core file */
++int kernel_debugging = 0;
++int kernel_writablecore = 0;
++
++static char *core_file;
++static int core_kd = -1;
++static struct proc *cur_proc;
++static CORE_ADDR kernel_start;
++
++static CORE_ADDR pcpu;
++#define	PCPU_OFFSET(name)						\
++	offsetof(struct pcpu, pc_ ## name)
++
++/*
++ * Symbol names of kernel entry points.  Use special frames.
++ */
++#define	KSYM_TRAP	"calltrap"
++#define	KSYM_INTR	"Xintr"
++#define	KSYM_FASTINTR	"Xfastintr"
++#define	KSYM_SYSCALL	"Xsyscall"
++
++/*
++ * 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))))
++
++
++
++/*
++ * 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 (fr)
++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)
++                       frametype = tf_syscall;
++       }
++
++       switch (frametype) {
++       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 CORE_ADDR
++ksym_lookup (name)
++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);
++}
++
++static struct proc *
++curProc ()
++{
++  struct proc *p;
++  struct thread *td;
++  CORE_ADDR addr = pcpu + PCPU_OFFSET (curthread);
++
++  if (kvread (addr, &td))
++    error ("cannot read thread pointer at %x\n", addr);
++  addr = (CORE_ADDR)td + offsetof(struct thread, td_proc);
++  if (kvread (addr, &p))
++    error ("cannot read proc pointer at %x\n", addr);
++  return p;
++}
++
++/*
++ * Set the process context to that of the proc structure at
++ * system address paddr.
++ */
++static int
++set_proc_context (paddr)
++	CORE_ADDR paddr;
++{
++  struct proc p;
++
++  if (paddr < kernel_start)
++    return (1);
++
++  cur_proc = (struct proc *)paddr;
++#ifdef notyet
++  set_kernel_boundaries (cur_proc);
++#endif
++
++  /* 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 (), 0);
++  return (0);
++}
++
++/* Discard all vestiges of any previous core file
++   and mark data and stack spaces as empty.  */
++
++/* ARGSUSED */
++static void
++kcore_close (quitting)
++     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 = -1;
++    }
++}
++
++/* This routine opens and sets up the core file bfd */
++
++static void
++kcore_open (filename, from_tty)
++     char *filename;
++     int from_tty;
++{
++  const char *p;
++  struct cleanup *old_chain;
++  char buf[256], *cp;
++  int ontop;
++  CORE_ADDR addr;
++  struct pcb pcb;
++
++  target_preopen (from_tty);
++
++  unpush_target (&kcore_ops);
++
++  if (!filename)
++    {
++      /*error (core_kd?*/
++      error ( (core_kd >= 0)?
++	     "No core file specified.  (Use `detach' to stop debugging a core file.)"
++	     : "No core file specified.");
++    }
++
++  filename = tilde_expand (filename);
++  if (filename[0] != '/')
++    {
++      cp = concat (current_directory, "/", filename, NULL);
++      free (filename);
++      filename = cp;
++    }
++
++  old_chain = make_cleanup (free, filename);
++
++  /*
++   * gdb doesn't really do anything if the exec-file couldn't
++   * be opened (in that case exec_bfd is NULL). Usually that's
++   * no big deal, but kvm_open needs the exec-file's name,
++   * which results in dereferencing a NULL pointer, a real NO-NO !
++   * So, check here if the open of the exec-file succeeded.
++   */
++  if (exec_bfd == NULL) /* the open failed */
++    error ("kgdb could not open the exec-file, please check the name you used !");
++
++  core_kd = kvm_open (exec_bfd->filename, filename, NULL,
++		      kernel_writablecore? O_RDWR : O_RDONLY, "kgdb: ");
++  if (core_kd < 0)
++    perror_with_name (filename);
++
++  /* 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;
++  ontop = !push_target (&kcore_ops);
++
++  kernel_start = bfd_get_start_address (exec_bfd); /* XXX */
++
++  /* 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 ("panicstr: %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;
++    }
++
++  /* we may need this later */
++  cur_proc = (struct proc *)curProc ();
++  /* 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 (), 0);
++  print_stack_frame (selected_frame, selected_frame_level, 1);
++}
++
++static void
++kcore_detach (args, from_tty)
++     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");
++}
++
++/* 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 (regno)
++     int regno;
++{
++  struct pcb *pcbaddr;
++  struct thread *mainthread;
++
++  /* find the pcb for the current process */
++  if (cur_proc == NULL)
++    error ("get_kcore_registers no proc");
++  if (kvread (&TAILQ_FIRST(&cur_proc->p_threads), &mainthread)) /* XXXKSE */
++    error ("cannot read main thread for proc at %#x", cur_proc);
++  if (kvread (&mainthread->td_pcb, &pcbaddr)) /* XXXKSE */
++    error ("cannot read pcb pointer for proc at %#x", cur_proc);
++  if (read_pcb (core_kd, (CORE_ADDR)pcbaddr) < 0)
++    error ("cannot read pcb at %#x", pcbaddr);
++}
++
++static void
++kcore_files_info (t)
++     struct target_ops *t;
++{
++  printf ("\t`%s'\n", core_file);
++}
++
++static CORE_ADDR
++ksym_maxuseraddr()
++{
++  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;
++}
++
++static int
++kcore_xfer_kmem (memaddr, myaddr, len, write, attrib, target)
++     CORE_ADDR memaddr;
++     char *myaddr;
++     int len;
++     int write;
++     struct mem_attrib *attrib;
++     struct target_ops *target;
++{
++  int ns;
++  int nu;
++
++  if (memaddr >= ksym_maxuseraddr())
++    nu = 0;
++  else
++    {
++      nu = xfer_umem (memaddr, myaddr, len, write);
++      if (nu <= 0)
++	return (0);
++      if (nu == len)
++	return (nu);
++      memaddr += nu;
++      if (memaddr != ksym_maxuseraddr())
++	return (nu);
++      myaddr += nu;
++      len -= nu;
++    }
++
++  ns = (write ? kvm_write : kvm_read) (core_kd, memaddr, myaddr, len);
++  if (ns < 0)
++    ns = 0;
++
++  return (nu + ns);
++}
++
++static int
++xfer_umem (memaddr, myaddr, len, write)
++     CORE_ADDR memaddr;
++     char *myaddr;
++     int len;
++     int write; /* ignored */
++{
++  int n;
++  struct proc proc;
++
++  if (cur_proc == NULL || kvread (cur_proc, &proc))
++    error ("cannot read proc at %#x", cur_proc);
++  n = kvm_uread (core_kd, &proc, memaddr, myaddr, len) ;
++
++  if (n < 0)
++    return 0;
++  return n;
++}
++
++static CORE_ADDR
++ksym_kernbase()
++{
++  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)
++
++static CORE_ADDR sbr;
++static CORE_ADDR curpcb;
++static int found_pcb;
++static int devmem;
++static int kfd;
++static struct pcb pcb;
++
++static void
++set_proc_cmd (arg, from_tty)
++     char *arg;
++     int from_tty;
++{
++  CORE_ADDR paddr;
++  struct kinfo_proc *kp;
++  int cnt = 0;
++
++  if (!arg)
++    error_no_arg ("proc address for new current process");
++  if (!kernel_debugging)
++    error ("not debugging kernel");
++
++  paddr = (CORE_ADDR)parse_and_eval_address (arg);
++  /* assume it's a proc pointer if it's in the kernel */
++  if (paddr >= kernel_start) {
++    if (set_proc_context(paddr))
++      error("invalid proc address");
++    } else {
++      kp = kvm_getprocs(core_kd, KERN_PROC_PID, paddr, &cnt);
++      if (!cnt)
++        error("invalid pid");
++      if (set_proc_context((CORE_ADDR)kp->ki_paddr))
++        error("invalid proc address");
++  }
++}
++
++static void
++set_cpu_cmd (arg, from_tty)
++     char *arg;
++     int from_tty;
++{
++  CORE_ADDR paddr;
++  CORE_ADDR pcaddr;
++  struct kinfo_proc *kp;
++  int cpu, cfd;
++
++  if (!arg)
++    error_no_arg ("cpu number");
++  if (!kernel_debugging)
++    error ("not debugging kernel");
++
++  cfd = core_kd;
++  cpu = (int)parse_and_eval_address (arg);
++  if ((pcaddr = kvm_getpcpu (cfd, cpu)) == NULL)
++    error ("cpu number out of range");
++
++  pcpu = pcaddr;
++  curpcb = kvtophys(cfd, pcpu + PCPU_OFFSET (curpcb));
++  physrd (cfd, curpcb, (char*)&curpcb, sizeof curpcb);
++
++  if (!devmem)
++    paddr = ksym_lookup ("dumppcb") - KERNOFF;
++  else
++    paddr = kvtophys (cfd, curpcb);
++  read_pcb (cfd, paddr);
++  printf ("initial pcb at %lx\n", (unsigned long)paddr);
++
++  if ((cur_proc = curProc()))
++    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 (), 0);
++  print_stack_frame (selected_frame, selected_frame_level, 1);
++}
++
++/* substitutes for the stuff in libkvm which doesn't work */
++/* most of this was taken from the old kgdb */
++
++/* we don't need all this stuff, but the call should look the same */
++
++static int
++kvm_open (efile, cfile, sfile, perm, errout)
++     const char *efile;
++     char *cfile;
++     char *sfile;		/* makes this kvm_open more compatible to the one in libkvm */
++     int perm;
++     char *errout;		/* makes this kvm_open more compatible to the one in libkvm */
++{
++  struct stat stb;
++  int cfd;
++  CORE_ADDR paddr;
++
++  if ((cfd = open (cfile, perm, 0)) < 0)
++    return (cfd);
++
++  if ((pcpu = kvm_getpcpu (cfd, 0)) == NULL)
++    return (-1);
++
++  fstat (cfd, &stb);
++  if ((stb.st_mode & S_IFMT) == S_IFCHR
++      && stb.st_rdev == makedev (2, 0))
++    {
++      devmem = 1;
++      kfd = open (_PATH_KMEM, perm, 0);
++    }
++
++  physrd (cfd, ksym_lookup ("IdlePTD") - KERNOFF, (char*)&sbr, sizeof sbr);
++  printf ("IdlePTD at phsyical address 0x%08lx\n", (unsigned long)sbr);
++  curpcb = kvtophys(cfd, pcpu + PCPU_OFFSET (curpcb));
++  physrd (cfd, curpcb, (char*)&curpcb, sizeof curpcb);
++
++  found_pcb = 1; /* for vtophys */
++  if (!devmem)
++    paddr = ksym_lookup ("dumppcb") - KERNOFF;
++  else
++    paddr = kvtophys (cfd, curpcb);
++  read_pcb (cfd, paddr);
++  printf ("initial pcb at physical address 0x%08lx\n", (unsigned long)paddr);
++
++  return (cfd);
++}
++
++static int
++kvm_close (fd)
++     int fd;
++{
++  return (close (fd));
++}
++
++static int
++kvm_write (core_kd, memaddr, myaddr, len)
++     int core_kd;
++     CORE_ADDR memaddr;
++     char *myaddr;
++{
++  int cc;
++
++  if (devmem)
++    {
++      if (kfd > 0)
++	{
++	  /*
++	   * Just like kvm_read, only we write.
++	   */
++	  errno = 0;
++	  if (lseek (kfd, (off_t)memaddr, 0) < 0
++	      && errno != 0)
++	    {
++	      error ("kvm_write:invalid address (%x)", memaddr);
++	      return (0);
++	    }
++	  cc = write (kfd, myaddr, len);
++	  if (cc < 0)
++	    {
++	      error ("kvm_write:write failed");
++	      return (0);
++	    }
++	  else if (cc < len)
++	    error ("kvm_write:short write");
++	  return (cc);
++	}
++      else
++	return (0);
++    }
++  else
++    {
++      printf ("kvm_write not implemented for dead kernels\n");
++      return (0);
++    }
++  /* NOTREACHED */
++}
++
++static int
++kvm_read (core_kd, memaddr, myaddr, len)
++     int core_kd;
++     CORE_ADDR memaddr;
++     char *myaddr;
++{
++  return (kernel_core_file_hook (core_kd, memaddr, myaddr, len));
++}
++
++static int
++kvm_uread (core_kd, p, memaddr, myaddr, len)
++     int core_kd;
++     register struct proc *p;
++     CORE_ADDR memaddr;
++     char *myaddr;
++     int len;
++{
++  register char *cp;
++  char procfile[MAXPATHLEN];
++  ssize_t amount;
++  int fd;
++
++  if (devmem) 
++    {
++      sprintf (procfile, "/proc/%d/mem", p->p_pid);
++      fd = open (procfile, O_RDONLY, 0);
++      if (fd < 0)
++	{
++	  error ("cannot open %s", procfile);
++	  close (fd);
++	  return (0);
++	}
++
++      cp = myaddr;
++      while (len > 0)
++	{
++	  errno = 0;
++	  if (lseek (fd, (off_t)memaddr, 0) == -1 && errno != 0)
++	    {
++	      error ("invalid address (%x) in %s", memaddr, procfile);
++	      break;
++	    }
++	  amount = read (fd, cp, len);
++	  if (amount < 0)
++	    {
++	      error ("error reading %s", procfile);
++	      break;
++	    }
++	  if (amount == 0)
++	    {
++	      error ("EOF reading %s", procfile);
++	      break;
++	    }
++	  cp += amount;
++	  memaddr += amount;
++	  len -= amount;
++	}
++
++      close (fd);
++      return ((ssize_t) (cp - myaddr));
++    }
++  else
++    return (kernel_core_file_hook (core_kd, memaddr, myaddr, len));
++}
++
++static struct kinfo_proc kp;
++
++/*
++ * try to do what kvm_proclist in libkvm would do
++ */
++static int
++kvm_proclist (cfd, pid, p, cnt)
++int cfd, pid, *cnt;
++struct proc *p;
++{
++  struct proc lp;
++
++  for (; p != NULL; p = LIST_NEXT(&lp, p_list)) {
++      if (!kvm_read(cfd, (CORE_ADDR)p, (char *)&lp, sizeof (lp)))
++            return (0);
++       if (lp.p_pid != pid)
++           continue;
++       kp.ki_paddr = p;
++       *cnt = 1;
++       return (1);
++  }
++  *cnt = 0;
++  return (0);
++}
++
++/*
++ * try to do what kvm_deadprocs in libkvm would do
++ */
++static struct kinfo_proc *
++kvm_deadprocs (cfd, pid, cnt)
++int cfd, pid, *cnt;
++{
++  CORE_ADDR allproc, zombproc;
++  struct proc *p;
++
++  allproc = ksym_lookup("allproc");
++  if (kvm_read(cfd, allproc, (char *)&p, sizeof (p)) == 0)
++      return (NULL);
++  kvm_proclist (cfd, pid, p, cnt);
++  if (!*cnt) {
++      zombproc = ksym_lookup("zombproc");
++      if (kvm_read(cfd, zombproc, (char *)&p, sizeof (p)) == 0)
++           return (NULL);
++       kvm_proclist (cfd, pid, p, cnt);
++  }
++  return (&kp);
++}
++
++static CORE_ADDR
++kvm_getpcpu (cfd, cpuid)
++int cfd, cpuid;
++{
++  SLIST_HEAD(, pcpu) pcpu_head;
++  struct pcpu lpc;
++  struct pcpu *pc;
++
++  physrd (cfd, ksym_lookup ("cpuhead") - KERNOFF, (char*)&pcpu_head,
++    sizeof pcpu_head);
++  pc = SLIST_FIRST (&pcpu_head);
++  for (; pc != NULL; pc = SLIST_NEXT (&lpc, pc_allcpu))
++    {
++      kvm_read (cfd, (CORE_ADDR)pc, (char*)&lpc, sizeof lpc);
++      if (lpc.pc_cpuid == cpuid)
++        break;
++    }
++
++  return ((CORE_ADDR)pc);
++}
++
++/*
++ * try to do what kvm_getprocs in libkvm would do
++ */
++static struct kinfo_proc *
++kvm_getprocs (cfd, op, proc, cnt)
++int cfd, op, *cnt;
++CORE_ADDR proc;
++{
++  int mib[4], size;
++
++  *cnt = 0;
++  /* assume it's a pid */
++  if (devmem) { /* "live" kernel, use sysctl */
++      mib[0] = CTL_KERN;
++      mib[1] = KERN_PROC;
++      mib[2] = KERN_PROC_PID;
++      mib[3] = (int)proc;
++      size = sizeof (kp);
++      if (sysctl (mib, 4, &kp, &size, NULL, 0) < 0) {
++            perror("sysctl");
++            *cnt = 0;
++            return (NULL);
++      }
++      if (!size)
++            *cnt = 0;
++      else
++            *cnt = 1;
++      return (&kp);
++  } else
++      return (kvm_deadprocs (cfd, (int)proc, cnt));
++}
++
++static int
++physrd (cfd, addr, dat, len)
++     int cfd;
++     u_int addr;
++     char *dat;
++     int len;
++{
++  if (lseek (cfd, (off_t)addr, L_SET) == -1)
++    return (-1);
++  return (read (cfd, dat, len));
++}
++
++static CORE_ADDR
++kvtophys (fd, addr)
++     int fd;
++     CORE_ADDR addr;
++{
++  CORE_ADDR v;
++  unsigned int pte;
++  static CORE_ADDR PTD = -1;
++  CORE_ADDR current_ptd;
++
++  /*
++   * We may no longer have a linear system page table...
++   *
++   * Here's the scoop.  IdlePTD contains the physical address
++   * of a page table directory that always maps the kernel.
++   * IdlePTD is in memory that is mapped 1-to-1, so we can
++   * find it easily given its 'virtual' address from ksym_lookup().
++   * For hysterical reasons, the value of IdlePTD is stored in sbr.
++   *
++   * To look up a kernel address, we first convert it to a 1st-level
++   * address and look it up in IdlePTD.  This gives us the physical
++   * address of a page table page; we extract the 2nd-level part of
++   * VA and read the 2nd-level pte.  Finally, we add the offset part
++   * of the VA into the physical address from the pte and return it.
++   *
++   * User addresses are a little more complicated.  If we don't have
++   * a current PCB from read_pcb(), we use PTD, which is the (fixed)
++   * virtual address of the current ptd.  Since it's NOT in 1-to-1
++   * kernel space, we must look it up using IdlePTD.  If we do have
++   * a pcb, we get the ptd from pcb_ptd.
++   */
++
++  if (INKERNEL (addr))
++    current_ptd = sbr;
++  else if (found_pcb == 0)
++    {
++      if (PTD == -1)
++	PTD = kvtophys (fd, ksym_lookup ("PTD"));
++      current_ptd = PTD;
++    }
++  else
++    current_ptd = pcb.pcb_cr3;
++
++  /*
++   * Read the first-level page table (ptd).
++   */
++  v = current_ptd + ( (unsigned)addr >> PDRSHIFT) * sizeof pte;
++  if (physrd (fd, v, (char *)&pte, sizeof pte) < 0 || (pte&PG_V) == 0)
++    return (~0);
++
++  if (pte & PG_PS)
++    {
++      /*
++       * No second-level page table; ptd describes one 4MB page.
++       * (We assume that the kernel wouldn't set PG_PS without enabling
++       * it cr0, and that the kernel doesn't support 36-bit physical
++       * addresses).
++       */
++#define	PAGE4M_MASK	(NBPDR - 1)
++#define	PG_FRAME4M	(~PAGE4M_MASK)
++      addr = (pte & PG_FRAME4M) + (addr & PAGE4M_MASK);
++    }
++  else
++    {
++      /*
++       * Read the second-level page table.
++       */
++      v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
++      if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
++	return (~0);
++
++      addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
++    }
++#if 0
++  printf ("vtophys (%x) -> %x\n", oldaddr, addr);
++#endif
++  return (addr);
++}
++
++static int
++read_pcb (fd, uaddr)
++     int fd;
++     CORE_ADDR uaddr;
++{
++  int i;
++  int noreg;
++  CORE_ADDR nuaddr = uaddr;
++
++  /* need this for the `proc' command to work */
++  if (INKERNEL(uaddr))
++      nuaddr = kvtophys(fd, uaddr);
++
++  if (physrd (fd, nuaddr, (char *)&pcb, sizeof pcb) < 0)
++    {
++      error ("cannot read pcb at %x\n", uaddr);
++      return (-1);
++    }
++
++  /*
++   * 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? */
++}
++
++/*
++ * read len bytes from kernel virtual address 'addr' into local
++ * buffer 'buf'.  Return numbert of bytes if read ok, 0 otherwise.  On read
++ * errors, portion of buffer not read is zeroed.
++ */
++
++static int
++kernel_core_file_hook (fd, addr, buf, len)
++     int fd;
++     CORE_ADDR addr;
++     char *buf;
++     int len;
++{
++  int i;
++  CORE_ADDR paddr;
++  register char *cp;
++  int cc;
++
++  cp = buf;
++
++  while (len > 0)
++    {
++      paddr = kvtophys (fd, addr);
++      if (paddr == ~0)
++	{
++	  memset (buf, '\000', len);
++	  break;
++	}
++      /* we can't read across a page boundary */
++      i = min (len, PAGE_SIZE - (addr & PAGE_MASK));
++      if ( (cc = physrd (fd, paddr, cp, i)) <= 0)
++	{
++	  memset (cp, '\000', len);
++	  return (cp - buf);
++	}
++      cp += cc;
++      addr += cc;
++      len -= cc;
++    }
++  return (cp - buf);
++}
++
++static struct target_ops kcore_ops;
++
++#else
++int kernel_debugging = 0;
++#endif
++
++void
++_initialize_kcorelow()
++{
++#if __FreeBSD_version >= 500032 && defined(i386)
++  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 = kcore_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");
++  add_com ("cpu", class_obscure, set_cpu_cmd, "Set current cpu");
++#endif
++}
diff --git a/devel/gdb53/files/patch-gdb_symfile.c b/devel/gdb53/files/patch-gdb_symfile.c
new file mode 100644
index 000000000000..99c75ffe04bf
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_symfile.c
@@ -0,0 +1,15 @@
+--- gdb/symfile.c	Tue Feb 26 17:40:36 2002
++++ gdb/symfile.c	Wed May 29 11:10:17 2002
+@@ -1546,11 +1546,7 @@
+       char *val = sect_opts[i].value;
+       char *sec = sect_opts[i].name;
+  
+-      val = sect_opts[i].value;
+-      if (val[0] == '0' && val[1] == 'x')
+-	addr = strtoul (val+2, NULL, 16);
+-      else
+-	addr = strtoul (val, NULL, 10);
++      addr = parse_and_eval_address(val);
+ 
+       /* Here we store the section offsets in the order they were
+          entered on the command line. */
diff --git a/devel/gdb53/files/patch-gdb_target.c b/devel/gdb53/files/patch-gdb_target.c
new file mode 100644
index 000000000000..4eb3540c4482
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_target.c
@@ -0,0 +1,11 @@
+--- gdb/target.c	Thu Jan 31 17:01:21 2002
++++ gdb/target.c	Mon May 27 18:16:52 2002
+@@ -1361,7 +1361,7 @@
+   for (t = target_structs; t < target_structs + target_struct_size;
+        ++t)
+     {
+-      if ((*t)->to_stratum == core_stratum)
++      if ((*t)->to_stratum == (kernel_debugging ? kcore_stratum : core_stratum))
+ 	{
+ 	  runable = *t;
+ 	  ++count;
diff --git a/devel/gdb53/files/patch-gdb_target.h b/devel/gdb53/files/patch-gdb_target.h
new file mode 100644
index 000000000000..147cfe49620f
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_target.h
@@ -0,0 +1,10 @@
+--- gdb/target.h	Sat Feb  9 20:08:42 2002
++++ gdb/target.h	Fri May 24 08:38:31 2002
+@@ -52,6 +52,7 @@
+     dummy_stratum,		/* The lowest of the low */
+     file_stratum,		/* Executable files, etc */
+     core_stratum,		/* Core dump files */
++    kcore_stratum,		/* Kernel core files */
+     download_stratum,		/* Downloading of remote targets */
+     process_stratum,		/* Executing processes */
+     thread_stratum		/* Executing threads */
diff --git a/devel/gdb53/files/patch-gdb_version.in b/devel/gdb53/files/patch-gdb_version.in
new file mode 100644
index 000000000000..b00559ee28e5
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_version.in
@@ -0,0 +1,5 @@
+--- gdb/version.in	Fri Apr 26 18:04:22 2002
++++ gdb/version.in	Mon Jun  3 08:14:54 2002
+@@ -1 +1 @@
+-5.2
++5.2 (FreeBSD)