xnu-792.22.5.tar.gz

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

diff --git a/bsd/sys/user.h b/bsd/sys/user.h
index 4a2278ce08ad6182c377ba363dc712656f6492d7..636dac0e5b84b05a80f4d665be87b839a4aff424 100644 (file)
--- a/bsd/sys/user.h
+++ b/bsd/sys/user.h
@@ -88,15 +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 {
@@ -157,7 +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;
@@ -174,6 +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() */