Patches to get FreeBSD changes working with gdb-5.3.

9 files changed, 526 insertions, 849 deletions

diff --git a/devel/gdb53/files/patch-gdb_config_alpha_fbsd.mh b/devel/gdb53/files/patch-gdb_config_alpha_fbsd.mh
index cc2cca6cc779..5d5df6b89105 100644
--- a/devel/gdb53/files/patch-gdb_config_alpha_fbsd.mh
+++ b/devel/gdb53/files/patch-gdb_config_alpha_fbsd.mh
@@ -1,9 +1,10 @@
 --- gdb/config/alpha/fbsd.mh	Sat Jan 19 17:12:50 2002
-+++ gdb/config/alpha/fbsd.mh	Mon Jun  3 08:03:39 2002
-@@ -1,5 +1,5 @@
++++ gdb/config/alpha/fbsd.mh	Sun Oct 13 12:22:36 2002
+@@ -1,5 +1,6 @@
  # 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
++	corelow.o core-regset.o alphabsd-nat.o freebsd-uthread.o kvm-fbsd.o
  NAT_FILE= nm-fbsd.h
++NAT_CLIBS= -lkvm
diff --git a/devel/gdb53/files/patch-gdb_config_alpha_nm-fbsd.h b/devel/gdb53/files/patch-gdb_config_alpha_nm-fbsd.h
new file mode 100644
index 000000000000..d364e03cd2ec
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_config_alpha_nm-fbsd.h
@@ -0,0 +1,11 @@
+--- gdb/config/alpha/nm-fbsd.h	Tue Mar  6 00:21:21 2001
++++ gdb/config/alpha/nm-fbsd.h	Sun Oct 13 12:23:51 2002
+@@ -22,6 +22,8 @@
+ #ifndef NM_FBSD_H
+ #define NM_FBSD_H
+ 
++#include "config/nm-fbsd.h"
++
+ /* Type of the third argument to the `ptrace' system call.  */
+ #define PTRACE_ARG3_TYPE caddr_t
+ 
diff --git a/devel/gdb53/files/patch-gdb_config_i386_fbsd.mh b/devel/gdb53/files/patch-gdb_config_i386_fbsd.mh
index 0678a2e51368..b9645a9b1765 100644
--- a/devel/gdb53/files/patch-gdb_config_i386_fbsd.mh
+++ b/devel/gdb53/files/patch-gdb_config_i386_fbsd.mh
@@ -1,8 +1,10 @@
---- 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 @@
+--- gdb/config/i386/fbsd.mh	Sat May 11 10:22:27 2002
++++ gdb/config/i386/fbsd.mh	Sun Oct 13 11:50:47 2002
+@@ -4,4 +4,6 @@
  
  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 # xfreemod.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 i386bsd-nat.o i386fbsd-nat.o gcore.o fbsd-proc.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 i386bsd-nat.o i386fbsd-nat.o gcore.o fbsd-proc.o kvm-fbsd.o freebsd-uthread.o
++
++NAT_CLIBS= -lkvm
diff --git a/devel/gdb53/files/patch-gdb_config_i386_nm-fbsd.h b/devel/gdb53/files/patch-gdb_config_i386_nm-fbsd.h
index 3c33c3340f96..efd2ce270e6f 100644
--- a/devel/gdb53/files/patch-gdb_config_i386_nm-fbsd.h
+++ b/devel/gdb53/files/patch-gdb_config_i386_nm-fbsd.h
@@ -1,35 +1,10 @@
---- 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
-@@ -148,5 +152,32 @@
- #define ld_2		d_sdt
+--- gdb/config/i386/nm-fbsd.h	Fri Jun 28 11:44:49 2002
++++ gdb/config/i386/nm-fbsd.h	Sun Oct 13 10:53:27 2002
+@@ -26,6 +26,7 @@
+ #define I386_USE_GENERIC_WATCHPOINTS
+ #endif
  
- #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
++#include "config/nm-fbsd.h"
+ #include "i386/nm-i386.h"
  
- #endif /* NM_FBSD_H */
+ #ifdef HAVE_SYS_PARAM_H
diff --git a/devel/gdb53/files/patch-gdb_config_nm-fbsd.h b/devel/gdb53/files/patch-gdb_config_nm-fbsd.h
new file mode 100644
index 000000000000..80c2c6e4ce26
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_config_nm-fbsd.h
@@ -0,0 +1,34 @@
+--- gdb/config/nm-fbsd.h	Wed Dec 31 16:00:00 1969
++++ gdb/config/nm-fbsd.h	Sun Oct 13 10:53:14 2002
+@@ -0,0 +1,31 @@
++#ifndef CONFIG_NM_FBSD_H
++#define CONFIG_NM_FBSD_H
++
++extern int kernel_debugging;
++extern int kernel_writablecore;
++
++CORE_ADDR fbsd_kern_frame_saved_pc(struct frame_info *frame);
++
++#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 /* CONFIG_NM_FBSD_H */
diff --git a/devel/gdb53/files/patch-gdb_freebsd-uthread.c b/devel/gdb53/files/patch-gdb_freebsd-uthread.c
index 1e1512c4b40c..9d3fd5453eac 100644
--- a/devel/gdb53/files/patch-gdb_freebsd-uthread.c
+++ b/devel/gdb53/files/patch-gdb_freebsd-uthread.c
@@ -1,8 +1,6 @@
-$FreeBSD$
-
---- 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 @@
+--- gdb/freebsd-uthread.c	Wed Dec 31 16:00:00 1969
++++ gdb/freebsd-uthread.c	Sun Oct 13 13:10:51 2002
+@@ -0,0 +1,934 @@
 +/* $FreeBSD$ */
 +/* Low level interface for debugging FreeBSD user threads for GDB, the GNU debugger.
 +   Copyright 1996, 1999 Free Software Foundation, Inc.
@@ -42,6 +40,7 @@ $FreeBSD$
 +#include <sys/queue.h>
 +#include <signal.h>
 +#include <setjmp.h>
++#include <string.h>
 +#include "gdbthread.h"
 +#include "target.h"
 +#include "inferior.h"
@@ -50,6 +49,7 @@ $FreeBSD$
 +#include <unistd.h>
 +#include <sys/stat.h>
 +#include "gdbcore.h"
++#include "regcache.h"
 +
 +extern int child_suppress_run;
 +extern struct target_ops child_ops; /* target vector for inftarg.c */
@@ -163,7 +163,7 @@ $FreeBSD$
 +
 +  LIST_FOREACH(im, &map_hash[h], link)
 +    if (im->uniqueid == uniqueid)
-+    return MERGEPID(PIDGET(inferior_ptid), im->tid);
++      return MERGEPID(PIDGET(inferior_ptid), im->tid);
 +
 +  im = xmalloc(sizeof(struct idmap));
 +  im->uniqueid = uniqueid;
@@ -413,9 +413,12 @@ $FreeBSD$
 +  return rtnval;
 +}
 +
++/* XXX: this needs to be selected by target, not [build] host */
 +#ifdef __i386__
 +
-+static char sigmap[MAX_NUM_REGS] = /* map reg to sigcontext  */
++#include "i386-tdep.h"
++
++static char sigmap[I386_SSE_NUM_REGS] = /* map reg to sigcontext  */
 +{
 +  12,				/* eax */
 +  11,				/* ecx */
@@ -439,7 +442,7 @@ $FreeBSD$
 +  -1,				/* mxcsr */
 +};
 +
-+static char jmpmap[MAX_NUM_REGS] = /* map reg to jmp_buf */
++static char jmpmap[I386_SSE_NUM_REGS] = /* map reg to jmp_buf */
 +{
 +  6,				/* eax */
 +  -1,				/* ecx */
@@ -467,7 +470,9 @@ $FreeBSD$
 +
 +#ifdef __alpha__
 +
-+static char sigmap[NUM_REGS] =	/* map reg to sigcontext  */
++#include "alpha-tdep.h"
++
++static char sigmap[ALPHA_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 */
@@ -479,7 +484,7 @@ $FreeBSD$
 +  62, 63, 64, 65, 66, 67, 68, 69, /* f24 - f31 */
 +  33, -1			  /* pc, vfp */
 +};
-+static char jmpmap[NUM_REGS] = {
++static char jmpmap[ALPHA_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 */
@@ -493,6 +498,18 @@ $FreeBSD$
 +
 +#endif
 +
++#ifdef __sparc64__
++
++static char sigmap[125] =	/* map reg to sigcontext  */
++{
++  -1
++};
++static char jmpmap[125] = {
++  -1
++};
++
++#endif
++
 +static void
 +freebsd_uthread_fetch_registers (int regno)
 +{
@@ -918,4 +935,3 @@ $FreeBSD$
 +
 +  child_suppress_run = 1;
 +}
-
diff --git a/devel/gdb53/files/patch-gdb_i386-tdep.c b/devel/gdb53/files/patch-gdb_i386-tdep.c
new file mode 100644
index 000000000000..f91d21da8fc2
--- /dev/null
+++ b/devel/gdb53/files/patch-gdb_i386-tdep.c
@@ -0,0 +1,12 @@
+--- gdb+dejagnu-5.2.90_20021011/gdb/i386-tdep.c	Mon Aug 26 11:35:25 2002
++++ newgdb/gdb/i386-tdep.c	Sun Oct 13 14:15:58 2002
+@@ -534,6 +534,9 @@
+ static CORE_ADDR
+ i386_frame_saved_pc (struct frame_info *frame)
+ {
++  if (kernel_debugging)
++    return fbsd_kern_frame_saved_pc(frame);
++
+   if (PC_IN_CALL_DUMMY (frame->pc, 0, 0))
+     return generic_read_register_dummy (frame->pc, frame->frame,
+ 					PC_REGNUM);
diff --git a/devel/gdb53/files/patch-gdb_kvm-fbsd.c b/devel/gdb53/files/patch-gdb_kvm-fbsd.c
index 60ca07998e40..b6b063c82aeb 100644
--- a/devel/gdb53/files/patch-gdb_kvm-fbsd.c
+++ b/devel/gdb53/files/patch-gdb_kvm-fbsd.c
@@ -1,8 +1,9 @@
---- 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.
+--- gdb/kvm-fbsd.c	Wed Dec 31 16:00:00 1969
++++ gdb/kvm-fbsd.c	Sun Oct 13 13:57:00 2002
+@@ -0,0 +1,684 @@
++/* 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.
 +
@@ -18,22 +19,38 @@
 +
 +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.  */
++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 $ */
++/* $FreeBSD: /tmp/pcvs/ports/devel/gdb53/files/Attic/patch-gdb_kvm-fbsd.c,v 1.2 2002-10-13 21:22:39 mp Exp $ */
 +
-+#include "defs.h"
++/*
++ * 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 <paths.h>
++#include <kvm.h>
 +#include <sys/sysctl.h>
-+#include <sys/param.h>
-+#include <sys/time.h>
-+#include <sys/proc.h>
-+#include <sys/user.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"
@@ -43,254 +60,199 @@
 +#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));
++#include "regcache.h"
 +
-+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 void
++kcore_files_info (struct target_ops *);
 +
-+static CORE_ADDR kvtophys PARAMS ((int, CORE_ADDR));
++static void
++kcore_close (int);
 +
-+static int physrd PARAMS ((int, u_int, char*, int));
++static void
++get_kcore_registers (int);
 +
-+static int kvm_open PARAMS ((const char *efile, char *cfile, char *sfile,
-+			     int perm, char *errout));
++static int
++xfer_mem (CORE_ADDR, char *, int, int, struct mem_attrib *,
++          struct target_ops *);
 +
-+static int kvm_close PARAMS ((int fd));
++static int
++xfer_umem (CORE_ADDR, char *, int, int);
 +
-+static int kvm_write PARAMS ((int core_kd, CORE_ADDR memaddr,
-+			      char *myaddr, int len));
++static char		*core_file;
++static kvm_t		*core_kd;
++static struct pcb	cur_pcb;
++static struct kinfo_proc *cur_proc;
 +
-+static int kvm_read PARAMS ((int core_kd, CORE_ADDR memaddr,
-+			     char *myaddr, int len));
++static struct target_ops kcore_ops;
 +
-+static int kvm_uread PARAMS ((int core_kd, struct proc *p,
-+			      CORE_ADDR memaddr, char *myaddr,
-+			      int len));
++int kernel_debugging;
++int kernel_writablecore;
 +
-+static int kernel_core_file_hook PARAMS ((int fd, CORE_ADDR addr,
-+					  char *buf, int len));
++/* 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.  */
 +
-+static CORE_ADDR kvm_getpcpu PARAMS ((int cfd, int cpuid));
++#define kvread(addr, p) \
++  (target_read_memory ((CORE_ADDR) (addr), (char *) (p), sizeof (*(p))))
 +
-+static struct kinfo_proc * kvm_getprocs PARAMS ((int cfd, int op,
-+						CORE_ADDR proc, int *cnt));
++static CORE_ADDR
++ksym_kernbase (void)
++{
++  static CORE_ADDR kernbase;
++  struct minimal_symbol *sym;
 +
-+extern struct target_ops kcore_ops;	/* Forward decl */
++  if (kernbase == 0)
++    {
++      sym = lookup_minimal_symbol ("kernbase", NULL, NULL);
++      if (sym == NULL) {
++	kernbase = KERNBASE;
++      } else {
++	kernbase = SYMBOL_VALUE_ADDRESS (sym);
++      }
++    }
++  return kernbase;
++}
 +
-+/* Non-zero means we are debugging a kernel core file */
-+int kernel_debugging = 0;
-+int kernel_writablecore = 0;
++#define	KERNOFF		(ksym_kernbase ())
++#define	INKERNEL(x)	((x) >= KERNOFF)
 +
-+static char *core_file;
-+static int core_kd = -1;
-+static struct proc *cur_proc;
-+static CORE_ADDR kernel_start;
++CORE_ADDR
++ksym_lookup(const char *name)
++{
++  struct minimal_symbol *sym;
 +
-+static CORE_ADDR pcpu;
-+#define	PCPU_OFFSET(name)						\
-+	offsetof(struct pcpu, pc_ ## name)
++  sym = lookup_minimal_symbol (name, NULL, NULL);
++  if (sym == NULL)
++    error ("kernel symbol `%s' not found.", 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"
++  return SYMBOL_VALUE_ADDRESS (sym);
++}
 +
-+/*
-+ * 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))))
++/* 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);
 +
-+/*
-+ * 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 };
++  /* 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);
++	}
++  }
 +
-+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
-+       }
-+}
++  /* 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.  */
 +
-+static CORE_ADDR
-+ksym_lookup (name)
-+const char *name;
-+{
-+	struct minimal_symbol *sym;
++  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;
++	}
++    }
 +
-+	sym = lookup_minimal_symbol (name, NULL, NULL);
-+	if (sym == NULL)
-+		error ("kernel symbol `%s' not found.", name);
++  /* 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 SYMBOL_VALUE_ADDRESS (sym);
++  return ((CORE_ADDR)val);
 +}
 +
-+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 current context to that of the PCB struct at the system address
++   passed.  */
 +
-+/*
-+ * Set the process context to that of the proc structure at
-+ * system address paddr.
-+ */
 +static int
-+set_proc_context (paddr)
-+	CORE_ADDR paddr;
++set_context (CORE_ADDR addr)
 +{
-+  struct proc p;
++  CORE_ADDR procaddr = 0;
 +
-+  if (paddr < kernel_start)
-+    return (1);
-+
-+  cur_proc = (struct proc *)paddr;
-+#ifdef notyet
-+  set_kernel_boundaries (cur_proc);
-+#endif
++  if (kvread (addr, &cur_pcb))
++    error ("cannot read pcb at %#x", addr);
 +
-+  /* Fetch all registers from core file */
++  /* Fetch all registers from core file.  */
 +  target_fetch_registers (-1);
 +
-+  /* Now, set up the frame cache, and print the top of stack */
++  /* 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);
++  select_frame (get_current_frame ());
 +  return (0);
 +}
 +
-+/* Discard all vestiges of any previous core file
-+   and mark data and stack spaces as empty.  */
++/* Discard all vestiges of any previous core file and mark data and stack
++   spaces as empty.  */
 +
 +/* ARGSUSED */
 +static void
-+kcore_close (quitting)
-+     int quitting;
++kcore_close (int quitting)
 +{
-+  inferior_ptid = null_ptid;	/* Avoid confusion from thread stuff */
++
++  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;
++      core_kd = NULL;
 +    }
 +}
 +
-+/* This routine opens and sets up the core file bfd */
++/* This routine opens and sets up the core file bfd.  */
 +
 +static void
-+kcore_open (filename, from_tty)
-+     char *filename;
-+     int from_tty;
++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;
-+  struct pcb pcb;
 +
 +  target_preopen (from_tty);
 +
-+  unpush_target (&kcore_ops);
++  /* 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 (core_kd?*/
-+      error ( (core_kd >= 0)?
-+	     "No core file specified.  (Use `detach' to stop debugging a core file.)"
-+	     : "No core file specified.");
++      error ("No core file specified.");
++      return;
 +    }
 +
 +  filename = tilde_expand (filename);
@@ -303,76 +265,66 @@
 +
 +  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);
++  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. */
++  /* Looks semi-reasonable.  Toss the old core file and work on the new.  */
 +
-+  discard_cleanups (old_chain);	/* Don't free filename any more */
++  discard_cleanups (old_chain);		/* Don't free filename any more.  */
 +  core_file = filename;
++  unpush_target (&kcore_ops);
 +  ontop = !push_target (&kcore_ops);
 +
-+  kernel_start = bfd_get_start_address (exec_bfd); /* XXX */
++  /* 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)
++  /* 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++)
++
++      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);
++	printf_filtered ("panic: %s\n", buf);
 +    }
 +
-+  /* Print all the panic messages if possible. */
++  /* 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);
++                "/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);
++      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);
++  /* 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 (args, from_tty)
-+     char *args;
-+     int from_tty;
++kcore_detach (char *args, int from_tty)
 +{
 +  if (args)
 +    error ("Too many arguments");
@@ -382,39 +334,70 @@
 +    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.  */
++#ifdef __alpha__
 +
-+/* We just get all the registers, so we don't use regno.  */
-+/* ARGSUSED */
-+static void
-+get_kcore_registers (regno)
-+     int regno;
++#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)
 +{
-+  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);
++
++  /* 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 ();
 +}
 +
-+static void
-+kcore_files_info (t)
-+     struct target_ops *t;
++
++CORE_ADDR
++fbsd_kern_frame_saved_pc (struct frame_info *fi)
 +{
-+  printf ("\t`%s'\n", core_file);
++  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()
++ksym_maxuseraddr (void)
 +{
 +  static CORE_ADDR maxuseraddr;
 +  struct minimal_symbol *sym;
@@ -431,608 +414,256 @@
 +  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) ;
++/* 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"
 +
-+  if (n < 0)
-+    return 0;
-+  return n;
-+}
++/* 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 };
 +
-+static CORE_ADDR
-+ksym_kernbase()
++CORE_ADDR
++fbsd_kern_frame_saved_pc (struct frame_info *fr)
 +{
-+  static CORE_ADDR kernbase;
 +  struct minimal_symbol *sym;
++  CORE_ADDR this_saved_pc;
++  enum frametype frametype;
 +
-+  if (kernbase == 0)
++  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)
 +    {
-+      sym = lookup_minimal_symbol ("kernbase", NULL, NULL);
-+      if (sym == NULL) {
-+	kernbase = KERNBASE;
-+      } else {
-+	kernbase = SYMBOL_VALUE_ADDRESS (sym);
-+      }
++      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;
 +    }
-+  return kernbase;
-+}
 +
-+#define	KERNOFF		(ksym_kernbase())
-+#define	INKERNEL(x)	((x) >= KERNOFF)
++  switch (frametype)
++    {
++      default:
++      case tf_normal:
++        return (this_saved_pc);
++#define oEIP   offsetof (struct trapframe, tf_eip)
 +
-+static CORE_ADDR sbr;
-+static CORE_ADDR curpcb;
-+static int found_pcb;
-+static int devmem;
-+static int kfd;
-+static struct pcb pcb;
++      case tf_trap:
++	return (read_memory_integer (fr->frame + 8 + oEIP, 4));
 +
-+static void
-+set_proc_cmd (arg, from_tty)
-+     char *arg;
-+     int from_tty;
-+{
-+  CORE_ADDR paddr;
-+  struct kinfo_proc *kp;
-+  int cnt = 0;
++      case tf_interrupt:
++	return (read_memory_integer (fr->frame + 12 + oEIP, 4));
 +
-+  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");
-+  }
++      case tf_syscall:
++	return (read_memory_integer (fr->frame + 8 + oEIP, 4));
++#undef oEIP
++    }
 +}
 +
 +static void
-+set_cpu_cmd (arg, from_tty)
-+     char *arg;
-+     int from_tty;
++fetch_kcore_registers (struct pcb *pcb)
 +{
-+  CORE_ADDR paddr;
-+  CORE_ADDR pcaddr;
-+  struct kinfo_proc *kp;
-+  int cpu, cfd;
++  int i;
++  int noreg;
 +
-+  if (!arg)
-+    error_no_arg ("cpu number");
-+  if (!kernel_debugging)
-+    error ("not debugging kernel");
++  /* 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);
 +
-+  cfd = core_kd;
-+  cpu = (int)parse_and_eval_address (arg);
-+  if ((pcaddr = kvm_getpcpu (cfd, cpu)) == NULL)
-+    error ("cpu number out of range");
++  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);
 +
-+  pcpu = pcaddr;
-+  curpcb = kvtophys(cfd, pcpu + PCPU_OFFSET (curpcb));
-+  physrd (cfd, curpcb, (char*)&curpcb, sizeof curpcb);
++  for (i = 9; i < 14; ++i)		/* eflags, cs, ss, ds, es, fs */
++    supply_register (i, (char *) &noreg);
++  supply_register (15, (char *) &pcb->pcb_gs);
 +
-+  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);
++  /* XXX 80387 registers?  */
++}
 +
-+  if ((cur_proc = curProc()))
-+    target_fetch_registers (-1);
++#endif /* __i386__ */
 +
-+  /* 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);
-+}
++#ifdef __sparc64__
 +
-+/* substitutes for the stuff in libkvm which doesn't work */
-+/* most of this was taken from the old kgdb */
++/*
++#include "sparc/tm-sp64.h"
++*/
 +
-+/* we don't need all this stuff, but the call should look the same */
++fetch_kcore_registers (struct pcb *pcbp)
++{
++}
 +
-+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 */
++
++CORE_ADDR
++fbsd_kern_frame_saved_pc (struct frame_info *fi)
 +{
-+  struct stat stb;
-+  int cfd;
-+  CORE_ADDR paddr;
++	return NULL;
++}
 +
-+  if ((cfd = open (cfile, perm, 0)) < 0)
-+    return (cfd);
++#endif /* __sparc64__ */
 +
-+  if ((pcpu = kvm_getpcpu (cfd, 0)) == NULL)
-+    return (-1);
++/* 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.  */
 +
-+  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);
-+    }
++/* We just get all the registers, so we don't use regno.  */
 +
-+  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);
++/* ARGSUSED */
++static void
++get_kcore_registers (int regno)
++{
 +
-+  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);
++  /* 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...  */
 +
-+  return (cfd);
++  /* Zero out register set then fill in the ones we know about.  */
++  fetch_kcore_registers (&cur_pcb);
 +}
 +
-+static int
-+kvm_close (fd)
-+     int fd;
++static void
++kcore_files_info (t)
++  struct target_ops *t;
 +{
-+  return (close (fd));
++  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
-+kvm_write (core_kd, memaddr, myaddr, len)
-+     int core_kd;
-+     CORE_ADDR memaddr;
-+     char *myaddr;
++ignore (CORE_ADDR addr, char *contents)
 +{
-+  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 */
++  return 0;
 +}
 +
 +static int
-+kvm_read (core_kd, memaddr, myaddr, len)
-+     int core_kd;
-+     CORE_ADDR memaddr;
-+     char *myaddr;
++xfer_kmem (CORE_ADDR memaddr, char *myaddr, int len, int write,
++	   struct mem_attrib *attrib, struct target_ops *target)
 +{
-+  return (kernel_core_file_hook (core_kd, memaddr, myaddr, len));
-+}
++  int n;
 +
-+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);
-+	}
++  if (!INKERNEL (memaddr))
++    return xfer_umem (memaddr, myaddr, len, write);
 +
-+      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;
-+	}
++  if (core_kd == NULL)
++    return 0;
 +
-+      close (fd);
-+      return ((ssize_t) (cp - myaddr));
-+    }
++  if (write)
++    n = kvm_write (core_kd, memaddr, myaddr, len);
 +  else
-+    return (kernel_core_file_hook (core_kd, memaddr, myaddr, len));
++    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 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;
++xfer_umem (CORE_ADDR memaddr, char *myaddr, int len, int write /* ignored */)
 +{
-+  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);
-+}
++  int n = 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))
++  if (cur_proc == 0)
 +    {
-+      kvm_read (cfd, (CORE_ADDR)pc, (char*)&lpc, sizeof lpc);
-+      if (lpc.pc_cpuid == cpuid)
-+        break;
++      error ("---Can't read userspace from dump, or kernel process---\n");
++      return 0;
 +    }
 +
-+  return ((CORE_ADDR)pc);
-+}
++  if (write)
++    error ("kvm_uwrite unimplemented\n");
++  else
++    n = kvm_uread (core_kd, cur_proc, memaddr, myaddr, len) ;
 +
-+/*
-+ * 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));
-+}
++  if (n < 0)
++    return 0;
 +
-+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));
++  return n;
 +}
 +
-+static CORE_ADDR
-+kvtophys (fd, addr)
-+     int fd;
-+     CORE_ADDR addr;
++static void
++set_proc_cmd (char *arg, int from_tty)
 +{
-+  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.
-+   */
++  CORE_ADDR addr, pid_addr, first_td;
++  void *val;
++  struct kinfo_proc *kp;
++  int cnt;
++  pid_t pid;
 +
-+  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;
++  if (!arg)
++    error_no_arg ("proc address for the new context");
 +
-+  /*
-+   * 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 (core_kd == NULL)
++    error ("no kernel core file");
 +
-+  if (pte & PG_PS)
++  addr = (CORE_ADDR) parse_and_eval_address (arg);
++  
++  if (!INKERNEL (addr))
 +    {
-+      /*
-+       * 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);
++      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
 +    {
-+      /*
-+       * 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);
++      /* 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");	  
 +    }
 +
-+  /*
-+   * 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);
++  /* 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");
 +
-+  /* 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;
++  /* Read the PCB address in thread structure. */
++  addr = first_td + offsetof (struct thread, td_pcb);
++  if (kvread (addr, &val))
++    error("cannot read pcb ptr");
 +
-+  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);
++  /* Read the PCB address in proc structure. */
++  if (set_context ((CORE_ADDR) val))
++    error ("invalid proc address");
 +}
 +
-+static struct target_ops kcore_ops;
-+
-+#else
-+int kernel_debugging = 0;
-+#endif
-+
 +void
-+_initialize_kcorelow()
++_initialize_kcorelow (void)
 +{
-+#if __FreeBSD_version >= 500032 && defined(i386)
 +  kcore_ops.to_shortname = "kcore";
 +  kcore_ops.to_longname = "Kernel core dump file";
 +  kcore_ops.to_doc =
@@ -1042,7 +673,7 @@
 +  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_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;
@@ -1053,6 +684,4 @@
 +
 +  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_target.c b/devel/gdb53/files/patch-gdb_target.c
index 7a4be01dd55d..3bd25996c60a 100644
--- a/devel/gdb53/files/patch-gdb_target.c
+++ b/devel/gdb53/files/patch-gdb_target.c
@@ -1,14 +1,11 @@
---- gdb/target.c.orig	Thu Jan 31 17:01:21 2002
-+++ gdb/target.c	Fri Jun  7 16:36:06 2002
-@@ -1361,7 +1361,11 @@
+--- gdb/target.c	Mon Aug 26 12:18:33 2002
++++ gdb/target.c	Sun Oct 13 10:51:32 2002
+@@ -1429,7 +1429,7 @@
    for (t = target_structs; t < target_structs + target_struct_size;
         ++t)
      {
-+#if defined(__FreeBSD__) && defined(__i386__)
+-      if ((*t)->to_stratum == core_stratum)
 +      if ((*t)->to_stratum == (kernel_debugging ? kcore_stratum : core_stratum))
-+#else
-       if ((*t)->to_stratum == core_stratum)
-+#endif
  	{
  	  runable = *t;
  	  ++count;