xnu-792.21.3.tar.gz

[apple/xnu.git] / bsd / dev / ppc / systemcalls.c

diff --git a/bsd/dev/ppc/systemcalls.c b/bsd/dev/ppc/systemcalls.c
index 39ae16682e889ad1b63fc547a63202bfcc6b797a..6234853061eea082cf7aef1b64c037466a9a75a9 100644 (file)
--- a/bsd/dev/ppc/systemcalls.c
+++ b/bsd/dev/ppc/systemcalls.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -122,11 +122,16 @@ unix_syscall(struct savearea      *regs)
        if (uthread->uu_ucred != proc->p_ucred &&
            (uthread->uu_flag & UT_SETUID) == 0) {
                kauth_cred_t old = uthread->uu_ucred;
-               uthread->uu_ucred = kauth_cred_proc_ref(proc);
-               if (IS_VALID_CRED(old))
-                       kauth_cred_unref(&old);
+               proc_lock(proc);
+               uthread->uu_ucred = proc->p_ucred;
+               kauth_cred_ref(uthread->uu_ucred);
+               proc_unlock(proc);
+               if (old != NOCRED)
+                       kauth_cred_rele(old);
        }
 
+       uthread->uu_ar0 = (int *)regs;
+
        callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
 
        if (callp->sy_narg != 0) {
@@ -324,6 +329,7 @@ unix_syscall_return(int error)
        struct savearea                         *regs;
        unsigned short                          code;
        struct sysent                           *callp;
+       int funnel_type;
        unsigned int cancel_enable;
 
        thread_act = current_thread();
@@ -441,9 +447,90 @@ unix_syscall_return(int error)
        /* NOTREACHED */
 }
 
+/* 
+ * Time of day and interval timer support.
+ *
+ * These routines provide the kernel entry points to get and set
+ * the time-of-day and per-process interval timers.  Subroutines
+ * here provide support for adding and subtracting timeval structures
+ * and decrementing interval timers, optionally reloading the interval
+ * timers when they expire.
+ */
+/*  NOTE THIS implementation is for  ppc architectures only.
+ *  It is infrequently called, since the commpage intercepts
+ *  most calls in user mode.
+ *
+ * XXX Y2038 bug because of assumed return of 32 bit seconds value, and
+ * XXX first parameter to clock_gettimeofday()
+ */
+int
+ppc_gettimeofday(__unused struct proc *p, 
+                                register struct ppc_gettimeofday_args *uap, 
+                                register_t *retval)
+{
+       int error = 0;
+       extern lck_spin_t * tz_slock;
+
+       if (uap->tp)
+               clock_gettimeofday(&retval[0], &retval[1]);
+       
+       if (uap->tzp) {
+               struct timezone ltz;
+
+               lck_spin_lock(tz_slock);
+               ltz = tz;
+               lck_spin_unlock(tz_slock);
+               error = copyout((caddr_t)&ltz, uap->tzp, sizeof (tz));
+       }
+
+       return (error);
+}
+
 #ifdef JOE_DEBUG
 joe_debug(char *p) {
 
         printf("%s\n", p);
 }
 #endif
+
+
+/* 
+ * WARNING - this is a temporary workaround for binary compatibility issues
+ * with anti-piracy software that relies on patching ptrace (3928003).
+ * This KPI will be removed in the system release after Tiger.
+ */
+uintptr_t temp_patch_ptrace(uintptr_t new_ptrace)
+{
+       struct sysent *         callp;
+       sy_call_t *                     old_ptrace;
+
+       if (new_ptrace == 0)
+               return(0);
+               
+       enter_funnel_section(kernel_flock);
+       callp = &sysent[26];
+       old_ptrace = callp->sy_call;
+       
+       /* only allow one patcher of ptrace */
+       if (old_ptrace == (sy_call_t *) ptrace) {
+               callp->sy_call = (sy_call_t *) new_ptrace;
+       }
+       else {
+               old_ptrace = NULL;
+       }
+       exit_funnel_section( );
+       
+       return((uintptr_t)old_ptrace);
+}
+
+void temp_unpatch_ptrace(void)
+{
+       struct sysent *         callp;
+               
+       enter_funnel_section(kernel_flock);
+       callp = &sysent[26];
+       callp->sy_call = (sy_call_t *) ptrace;
+       exit_funnel_section( );
+       
+       return;
+}