$NetBSD: patch-ad,v 1.3 2015/12/29 04:04:32 dholland Exp $

--- libxc/xc_private.c.orig	2008-04-25 15:03:12.000000000 +0200
+++ libxc/xc_private.c	2008-09-14 23:37:40.000000000 +0200
@@ -10,7 +10,12 @@
 #include <stdarg.h>
 #include <pthread.h>
 
-static __thread xc_error last_error = { XC_ERROR_NONE, ""};
+static pthread_key_t last_error_pkey;
+static pthread_once_t last_error_pkey_once = PTHREAD_ONCE_INIT;
+
+static pthread_key_t errbuf_pkey;
+static pthread_once_t errbuf_pkey_once = PTHREAD_ONCE_INIT;
+
 #if DEBUG
 static xc_error_handler error_handler = xc_default_error_handler;
 #else
@@ -23,15 +28,44 @@
     fprintf(stderr, "ERROR %s: %s\n", desc, err->message);
 }
 
+static void
+_xc_clean_last_error(void *m)
+{
+	if (m)
+		free(m);
+	pthread_setspecific(last_error_pkey, NULL);
+}
+
+static void
+_xc_init_last_error(void)
+{
+		pthread_key_create(&last_error_pkey, _xc_clean_last_error);
+}
+static xc_error *
+_xc_get_last_error(void) {
+	xc_error *last_error;
+
+	pthread_once(&last_error_pkey_once, _xc_init_last_error);
+
+	last_error = pthread_getspecific(last_error_pkey);
+	if (last_error == NULL) {
+		last_error = malloc(sizeof(xc_error));
+		pthread_setspecific(last_error_pkey, last_error);
+	}
+	return last_error;
+}
+
+
 const xc_error *xc_get_last_error(void)
 {
-    return &last_error;
+    return _xc_get_last_error();
 }
 
 void xc_clear_last_error(void)
 {
-    last_error.code = XC_ERROR_NONE;
-    last_error.message[0] = '\0';
+    xc_error *last_error = _xc_get_last_error();
+    last_error->code = XC_ERROR_NONE;
+    last_error->message[0] = '\0';
 }
 
 const char *xc_error_code_to_desc(int code)
@@ -64,9 +98,10 @@
 
 static void _xc_set_error(int code, const char *msg)
 {
-    last_error.code = code;
-    strncpy(last_error.message, msg, XC_MAX_ERROR_MSG_LEN - 1);
-    last_error.message[XC_MAX_ERROR_MSG_LEN-1] = '\0';
+    xc_error *last_error = _xc_get_last_error();
+    last_error->code = code;
+    strncpy(last_error->message, msg, XC_MAX_ERROR_MSG_LEN - 1);
+    last_error->message[XC_MAX_ERROR_MSG_LEN-1] = '\0';
 }
 
 void xc_set_error(int code, const char *fmt, ...)
@@ -84,13 +119,19 @@
 
     errno = saved_errno;
 
-    if ( error_handler != NULL )
-        error_handler(&last_error);
+    if ( error_handler != NULL ) {
+	xc_error *last_error = _xc_get_last_error();
+        error_handler(last_error);
+    }
 }
 
 int lock_pages(void *addr, size_t len)
 {
       int e = 0;
+      size_t offset = (u_long)addr & 0xfffUL;
+      addr -= offset;
+      len  += offset;
+      len   = (len + 0xfffUL) & ~0xfffUL; /* round up */
 #ifndef __sun__
       e = mlock(addr, len);
 #endif
@@ -99,8 +140,10 @@
 
 void unlock_pages(void *addr, size_t len)
 {
+    void *laddr = (void *)((u_long)addr & ~0xfffUL);
+    size_t llen = (len + 0xfffUL) & ~0xfffUL;
 #ifndef __sun__
-    safe_munlock(addr, len);
+    safe_munlock(laddr, llen);
 #endif
 }
 
@@ -466,20 +509,43 @@
     return new_mfn;
 }
 
+static void
+_xc_clean_errbuf(void * m)
+{
+	if (m)
+		free(m);
+	pthread_setspecific(errbuf_pkey, NULL);
+}
+	
+static void
+_xc_init_errbuf(void)
+{
+    	pthread_key_create(&errbuf_pkey, _xc_clean_errbuf);
+}
+
 char *safe_strerror(int errcode)
 {
-    static __thread char errbuf[32];
+#define XS_BUFSIZE 32
+    char *errbuf;
     static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
     char *strerror_str;
 
+    pthread_once(&errbuf_pkey_once, _xc_init_errbuf);
+
+    errbuf = pthread_getspecific(errbuf_pkey);
+    if (errbuf == NULL) {
+    	errbuf = malloc(XS_BUFSIZE);
+    	pthread_setspecific(errbuf_pkey, errbuf);
+    }
+    
     /*
      * Thread-unsafe strerror() is protected by a local mutex. We copy
      * the string to a thread-private buffer before releasing the mutex.
      */
     pthread_mutex_lock(&mutex);
     strerror_str = strerror(errcode);
-    strncpy(errbuf, strerror_str, sizeof(errbuf));
-    errbuf[sizeof(errbuf)-1] = '\0';
+    strncpy(errbuf, strerror_str, XS_BUFSIZE);
+    errbuf[XS_BUFSIZE-1] = '\0';
     pthread_mutex_unlock(&mutex);
 
     return errbuf;