xnu-792.18.15.tar.gz

[apple/xnu.git] / bsd / sys / user.h

diff --git a/bsd/sys/user.h b/bsd/sys/user.h
index b90a52481f971cd1b392154f103bafd136437355..636dac0e5b84b05a80f4d665be87b839a4aff424 100644 (file)
--- a/bsd/sys/user.h
+++ b/bsd/sys/user.h
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
 /*
@@ -82,15 +88,15 @@
  *     Per-thread U area.
  */
 struct uthread {
-       int     *uu_ar0;                /* address of users saved R0 */
-
        /* syscall parameters, results and catches */
        u_int64_t uu_arg[8]; /* arguments to current system call */
        int     *uu_ap;                 /* pointer to arglist */
-    int uu_rval[2];
+        int uu_rval[2];
 
        /* thread exception handling */
+       int     uu_exception;
        int     uu_code;                        /* ``code'' to trap */
+       int     uu_subcode;
        char uu_cursig;                 /* p_cursig for exc. */
        /* support for select - across system calls */
        struct _select {
@@ -151,7 +157,7 @@ struct uthread {
        struct ucred    *uu_ucred;              /* per thread credential */
         int            uu_defer_reclaims;
         vnode_t                uu_vreclaims;
-
+               struct user_sigaltstack uu_sigstk;
 #ifdef JOE_DEBUG
         int            uu_iocount;
         int            uu_vpindex;
@@ -168,6 +174,7 @@ typedef struct uthread * uthread_t;
 #define UT_CANCEL      0x00000008             /* thread marked for cancel */
 #define UT_CANCELED    0x00000010            /* thread cancelled */
 #define UT_CANCELDISABLE 0x00000020            /* thread cancel disabled */
+#define UT_ALTSTACK 0x00000040  /* this thread has alt stack for signals */
 
 #define        UT_VFORK        0x02000000      /* thread has vfork children */
 #define        UT_SETUID       0x04000000      /* thread is settugid() */