xnu-792.tar.gz

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

diff --git a/bsd/sys/sysent.h b/bsd/sys/sysent.h
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+++ b/bsd/sys/sysent.h
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+/*
+ * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_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 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.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef _SYS_SYSENT_H_
+#define        _SYS_SYSENT_H_
+
+#include <sys/appleapiopts.h>
+#include <sys/cdefs.h>
+#ifdef __ppc__
+#include <sys/types.h>
+#endif
+
+#ifdef KERNEL_PRIVATE
+#ifdef __APPLE_API_PRIVATE
+
+typedef        int32_t sy_call_t(struct proc *, void *, int *);
+typedef        void    sy_munge_t(const void *, void *);
+
+extern struct sysent {         /* system call table */
+       int16_t         sy_narg;        /* number of args */
+       int8_t          sy_cancel;      /* funnel type */
+       int8_t          sy_funnel;      /* funnel type */
+       sy_call_t       *sy_call;       /* implementing function */
+       sy_munge_t      *sy_arg_munge32; /* system call aguments munger for 32-bit process */
+       sy_munge_t      *sy_arg_munge64; /* system call aguments munger for 64-bit process */
+       int32_t         sy_return_type; /* system call return types */
+} sysent[];
+
+/* sy_funnel flags bits */
+#define FUNNEL_MASK    0x00ff
+#define        UNSAFE_64BIT    0x0100
+
+/* 
+ * Valid values for sy_cancel
+ */
+#define _SYSCALL_CANCEL_NONE   0               /* Not a cancellation point */
+#define _SYSCALL_CANCEL_PRE            1               /* Canbe cancelled on entry itself */
+#define _SYSCALL_CANCEL_POST   2               /* Can only be cancelled after syscall is run */
+
+/*
+ * Valid values for sy_return_type
+ */
+#define _SYSCALL_RET_NONE              0
+#define _SYSCALL_RET_INT_T             1       
+#define _SYSCALL_RET_UINT_T            2       
+#define _SYSCALL_RET_OFF_T             3       
+#define _SYSCALL_RET_ADDR_T            4       
+#define _SYSCALL_RET_SIZE_T            5       
+#define _SYSCALL_RET_SSIZE_T   6       
+
+extern int nsysent;
+
+#endif /* __APPLE_API_PRIVATE */
+#endif /* KERNEL_PRIVATE */
+
+#endif /* !_SYS_SYSENT_H_ */