- 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

1 files changed, 922 insertions, 0 deletions

diff --git a/devel/gdb6/files/patch-freebsd-uthread.c b/devel/gdb6/files/patch-freebsd-uthread.c
new file mode 100644
index 000000000000..9b4d3b68575a
--- /dev/null
+++ b/devel/gdb6/files/patch-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;
++}
+