bsd/sys/fbt.h

   1 /*
   2  * Copyright (c) 2005-2006 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 #ifndef _FBT_H
  30 #define _FBT_H
  31
  32 #if defined(__i386__) || defined (__x86_64__)
  33 typedef uint8_t machine_inst_t;
  34 #else
  35 #error Unknown Architecture
  36 #endif
  37
  38 #define MAX_FBTP_NAME_CHARS 16
  39
  40 typedef struct fbt_probe {
  41         struct fbt_probe *fbtp_hashnext;
  42         machine_inst_t  *fbtp_patchpoint;
  43         int8_t                  fbtp_rval;
  44         machine_inst_t  fbtp_patchval;
  45         machine_inst_t  fbtp_savedval;
  46         machine_inst_t  fbtp_currentval;
  47         uintptr_t               fbtp_roffset;
  48         dtrace_id_t             fbtp_id;
  49         /* FIXME!
  50          * This field appears to only be used in error messages.
  51          * It puts this structure into the next size bucket in kmem_alloc
  52          * wasting 32 bytes per probe. (in i386 only)
  53          */
  54         char                    fbtp_name[MAX_FBTP_NAME_CHARS];
  55         struct modctl   *fbtp_ctl;
  56         int             fbtp_loadcnt;
  57 #if !defined(__APPLE__)
  58         int             fbtp_symndx;
  59 #endif
  60         struct fbt_probe *fbtp_next;
  61 } fbt_probe_t;
  62
  63 extern int dtrace_invop(uintptr_t, uintptr_t *, uintptr_t);
  64 extern int fbt_invop(uintptr_t, uintptr_t *, uintptr_t);
  65 extern void fbt_provide_module(void *, struct modctl *);
  66 extern int fbt_enable (void *arg, dtrace_id_t id, void *parg);
  67 #endif /* _FBT_H */