osfmk/kern/syscall_sw.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  */
  58
  59 #ifndef _KERN_SYSCALL_SW_H_
  60 #define _KERN_SYSCALL_SW_H_
  61
  62 #include <mach_assert.h>
  63
  64 /*
  65  *      mach_trap_stack indicates the trap may discard
  66  *      its kernel stack.  Some architectures may need
  67  *      to save more state in the pcb for these traps.
  68  */
  69 #if CONFIG_REQUIRES_U32_MUNGING
  70 typedef void    mach_munge_t(void *);
  71 #endif
  72
  73 typedef struct {
  74         int                     mach_trap_arg_count; /* Number of trap arguments (Arch independant) */
  75         kern_return_t           (*mach_trap_function)(void *);
  76 #if CONFIG_REQUIRES_U32_MUNGING || (__arm__ && (__BIGGEST_ALIGNMENT__ > 4))
  77         mach_munge_t            *mach_trap_arg_munge32; /* system call argument munger routine for 32-bit */
  78 #endif
  79         int                     mach_trap_u32_words; /* number of 32-bit words to copyin for U32 */
  80 #if     MACH_ASSERT
  81         const char*             mach_trap_name;
  82 #endif /* MACH_ASSERT */
  83 } mach_trap_t;
  84
  85 #define MACH_TRAP_TABLE_COUNT   128
  86
  87
  88 extern const mach_trap_t        mach_trap_table[];
  89 extern int                      mach_trap_count;
  90
  91 #if CONFIG_REQUIRES_U32_MUNGING || (__arm__ && (__BIGGEST_ALIGNMENT__ > 4))
  92
  93 #if     !MACH_ASSERT
  94 #define MACH_TRAP(name, arg_count, u32_arg_words, munge32)      \
  95         { (arg_count), (kern_return_t (*)(void *)) (name), munge32, (u32_arg_words)  }
  96 #else /* !MACH_ASSERT */
  97 #define MACH_TRAP(name, arg_count, u32_arg_words, munge32)      \
  98         { (arg_count), (kern_return_t (*)(void *)) (name), munge32, (u32_arg_words), #name  }
  99 #endif /* !MACH_ASSERT */
 100
 101
 102 #else /* !CONFIG_REQUIRES_U32_MUNGING || (__arm__ && (__BIGGEST_ALIGNMENT__ > 4)) */
 103
 104 #if     !MACH_ASSERT
 105 #define MACH_TRAP(name, arg_count, u32_arg_words, munge32)      \
 106         { (arg_count), (kern_return_t (*)(void *)) (name), (u32_arg_words)  }
 107 #else /* !MACH_ASSERT */
 108 #define MACH_TRAP(name, arg_count, u32_arg_words, munge32)      \
 109         { (arg_count), (kern_return_t (*)(void *)) (name), (u32_arg_words), #name  }
 110 #endif /* !MACH_ASSERT */
 111
 112 #endif /* !CONFIG_REQUIRES_U32_MUNGING */
 113
 114 #endif  /* _KERN_SYSCALL_SW_H_ */