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diff --git a/gc/solaris_pthreads.c b/gc/solaris_pthreads.c
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+/* 
+ * Copyright (c) 1994 by Xerox Corporation.  All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose,  provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/*
+ * Support code for Solaris threads.  Provides functionality we wish Sun
+ * had provided.  Relies on some information we probably shouldn't rely on.
+ * Modified Peter C. for Solaris Posix Threads.
+ */
+/* Boehm, September 14, 1994 4:44 pm PDT */
+/* $Id: solaris_pthreads.c,v 1.1 2001/11/08 05:17:57 a-ito Exp $ */
+
+# if defined(_SOLARIS_PTHREADS)
+# include "gc_priv.h"
+# include <pthread.h>
+# include <thread.h>
+# include <signal.h>
+# include <fcntl.h>
+# include <sys/types.h>
+# include <sys/mman.h>
+# include <sys/time.h>
+# include <sys/resource.h>
+# include <sys/stat.h>
+# include <sys/syscall.h>
+# include <sys/procfs.h>
+# include <sys/lwp.h>
+# include <sys/reg.h>
+# define _CLASSIC_XOPEN_TYPES
+# include <unistd.h>
+# include <errno.h>
+# include "solaris_threads.h"
+# include <stdio.h>
+
+#undef pthread_join
+#undef pthread_create
+
+pthread_cond_t GC_prom_join_cv;		/* Broadcast when any thread terminates	*/
+pthread_cond_t GC_create_cv;		/* Signalled when a new undetached	*/
+				/* thread starts.			*/
+				
+extern GC_bool GC_multithreaded;
+
+/* We use the allocation lock to protect thread-related data structures. */
+
+/* We stop the world using /proc primitives.  This makes some	*/
+/* minimal assumptions about the threads implementation.	*/
+/* We don't play by the rules, since the rules make this	*/
+/* impossible (as of Solaris 2.3).  Also note that as of	*/
+/* Solaris 2.3 the various thread and lwp suspension		*/
+/* primitives failed to stop threads by the time the request	*/
+/* is completed.						*/
+
+
+
+int GC_pthread_join(pthread_t wait_for, void **status)
+{
+	return GC_thr_join((thread_t)wait_for, NULL, status);
+}
+
+
+int
+GC_pthread_create(pthread_t *new_thread,
+          const pthread_attr_t *attr_in,
+          void * (*thread_execp)(void *), void *arg)
+{
+    int result;
+    GC_thread t;
+    pthread_t my_new_thread;
+    pthread_attr_t  attr;
+    word my_flags = 0;
+    int  flag;
+    void * stack;
+    size_t stack_size;
+    int    n;
+    struct sched_param schedparam;
+   
+    (void)pthread_attr_getstacksize(attr_in, &stack_size);
+    (void)pthread_attr_getstackaddr(attr_in, &stack);
+    (void)pthread_attr_init(&attr);
+
+    LOCK();
+    if (!GC_thr_initialized) {
+	    GC_thr_init();
+    }
+    GC_multithreaded++;
+	    
+    if (stack == 0) {
+     	if (stack_size == 0)
+		stack_size = GC_min_stack_sz;
+	else
+		stack_size += thr_min_stack();
+
+     	stack = (void *)GC_stack_alloc(&stack_size);
+     	if (stack == 0) {
+	    GC_multithreaded--;
+     	    UNLOCK();
+	    errno = ENOMEM;
+     	    return -1;
+     	}
+    } else {
+    	my_flags |= CLIENT_OWNS_STACK;
+    }
+    (void)pthread_attr_setstacksize(&attr, stack_size);
+    (void)pthread_attr_setstackaddr(&attr, stack);
+    (void)pthread_attr_getscope(attr_in, &n);
+    (void)pthread_attr_setscope(&attr, n);
+    (void)pthread_attr_getschedparam(attr_in, &schedparam);
+    (void)pthread_attr_setschedparam(&attr, &schedparam);
+    (void)pthread_attr_getschedpolicy(attr_in, &n);
+    (void)pthread_attr_setschedpolicy(&attr, n);
+    (void)pthread_attr_getinheritsched(attr_in, &n);
+    (void)pthread_attr_setinheritsched(&attr, n);
+
+    (void)pthread_attr_getdetachstate(attr_in, &flag);
+    if (flag == PTHREAD_CREATE_DETACHED) {
+	    my_flags |= DETACHED;
+    }
+    (void)pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
+    /*
+     * thr_create can call malloc(), which if redirected will
+     * attempt to acquire the allocation lock.
+     * Unlock here to prevent deadlock.
+     */
+
+
+#if 0
+#ifdef I386
+    UNLOCK();
+#endif
+#endif
+    result = 
+	    pthread_create(&my_new_thread, &attr, thread_execp, arg);
+#if 0
+#ifdef I386
+    LOCK();
+#endif
+#endif
+    if (result == 0) {
+        t = GC_new_thread(my_new_thread);
+        t -> flags = my_flags;
+        if (!(my_flags & DETACHED)) cond_init(&(t->join_cv), USYNC_THREAD, 0);
+        t -> stack = stack;
+        t -> stack_size = stack_size;
+        if (new_thread != 0) *new_thread = my_new_thread;
+        pthread_cond_signal(&GC_create_cv);
+    } else {
+	    if (!(my_flags & CLIENT_OWNS_STACK)) {
+		    GC_stack_free(stack, stack_size);
+	    }        
+	    GC_multithreaded--;
+    }
+    UNLOCK();
+    pthread_attr_destroy(&attr);
+    return(result);
+}
+
+# else
+
+#ifndef LINT
+  int GC_no_sunOS_pthreads;
+#endif
+
+# endif /* SOLARIS_THREADS */
+