xnu-792.22.5.tar.gz

[apple/xnu.git] / bsd / dev / chud / chud_bsd_callback.c

diff --git a/bsd/dev/chud/chud_bsd_callback.c b/bsd/dev/chud/chud_bsd_callback.c
new file mode 100644 (file)
index 0000000..68daf18
--- /dev/null
+++ b/bsd/dev/chud/chud_bsd_callback.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2003-2005 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * 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.
+ * 
+ * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+#include <stdint.h>
+#include <mach/boolean.h>
+#include <mach/mach_types.h>
+
+#include <sys/syscall.h>
+#include <sys/types.h> /* u_int */
+#include <sys/proc.h> /* struct proc */
+#include <sys/systm.h> /* struct sysent */
+#include <sys/sysproto.h>
+
+#pragma mark **** kern debug ****
+typedef void (*chudxnu_kdebug_callback_func_t)(uint32_t debugid, uint32_t arg0, uint32_t arg1, uint32_t arg2, uint32_t arg3, uint32_t arg4);
+static chudxnu_kdebug_callback_func_t kdebug_callback_fn = NULL;
+
+kern_return_t chudxnu_kdebug_callback_enter(chudxnu_kdebug_callback_func_t);
+kern_return_t chudxnu_kdebug_callback_cancel(void);
+
+extern void kdbg_control_chud(int val, void *fn);
+extern unsigned int kdebug_enable;
+
+static void
+chudxnu_private_kdebug_callback(
+       unsigned int debugid,
+       unsigned int arg0,
+       unsigned int arg1,
+       unsigned int arg2,
+       unsigned int arg3,
+       unsigned int arg4)
+{
+    chudxnu_kdebug_callback_func_t fn = kdebug_callback_fn;
+    
+    if(fn) {
+        (fn)(debugid, arg0, arg1, arg2, arg3, arg4);
+    }
+}
+
+__private_extern__ kern_return_t
+chudxnu_kdebug_callback_enter(chudxnu_kdebug_callback_func_t func)
+{
+    kdebug_callback_fn = func;
+
+    kdbg_control_chud(TRUE, (void *)chudxnu_private_kdebug_callback);
+    kdebug_enable |= 0x10;
+
+    return KERN_SUCCESS;
+}
+
+__private_extern__ kern_return_t
+chudxnu_kdebug_callback_cancel(void)
+{
+    kdebug_callback_fn = NULL;
+    kdbg_control_chud(FALSE, NULL);
+    kdebug_enable &= ~(0x10);
+
+    return KERN_SUCCESS;
+}
+
+#pragma mark **** CHUD syscall ****
+typedef kern_return_t (*chudxnu_syscall_callback_func_t)(uint32_t code, uint32_t arg0, uint32_t arg1, uint32_t arg2, uint32_t arg3, uint32_t arg4);
+static chudxnu_syscall_callback_func_t syscall_callback_fn = NULL;
+
+kern_return_t chudxnu_syscall_callback_enter(chudxnu_syscall_callback_func_t func);
+kern_return_t chudxnu_syscall_callback_cancel(void);
+
+int chud(p, uap, retval)
+     struct proc *p;
+     struct chud_args *uap;
+     register_t *retval;
+{
+#pragma unused (p)
+
+    chudxnu_syscall_callback_func_t fn = syscall_callback_fn;
+    
+       if(!fn) {
+               return EINVAL;
+       }
+       
+       *retval = fn(uap->code, uap->arg1, uap->arg2, uap->arg3, uap->arg4, uap->arg5);
+               
+       return 0;
+}
+
+__private_extern__
+kern_return_t chudxnu_syscall_callback_enter(chudxnu_syscall_callback_func_t func)
+{
+       syscall_callback_fn = func;
+    return KERN_SUCCESS;
+}
+
+__private_extern__
+kern_return_t chudxnu_syscall_callback_cancel(void)
+{
+       syscall_callback_fn = NULL;
+    return KERN_SUCCESS;
+}