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1 /*

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 */

29 #ifndef _FBT_H

30 #define _FBT_H

32 #if defined (__x86_64__)

33 typedef uint8_t machine_inst_t;

34 #elif defined(__arm__)

35 typedef uint16_t machine_inst_t;

36 #elif defined(__arm64__)

37 typedef uint32_t machine_inst_t;

38 #else

39 #error Unknown Architecture

40 #endif

42 #define MAX_FBTP_NAME_CHARS 16

44 typedef struct fbt_probe {

45 struct fbt_probe *fbtp_hashnext;

46 machine_inst_t *fbtp_patchpoint;

47 int8_t fbtp_rval;

48 machine_inst_t fbtp_patchval;

49 machine_inst_t fbtp_savedval;

50 machine_inst_t fbtp_currentval;

51 uintptr_t fbtp_roffset;

52 dtrace_id_t fbtp_id;

53 /* FIXME!

54 * This field appears to only be used in error messages.

55 * It puts this structure into the next size bucket in kmem_alloc

56 * wasting 32 bytes per probe. (in i386 only)

57 */

58 char fbtp_name[MAX_FBTP_NAME_CHARS];

59 struct modctl *fbtp_ctl;

60 int fbtp_loadcnt;

61 struct fbt_probe *fbtp_next;

62 } fbt_probe_t;

 extern int dtrace_invop(uintptr_t, uintptr_t *, uintptr_t);

 extern int fbt_invop(uintptr_t, uintptr_t *, uintptr_t);

 extern void fbt_provide_module(void *, struct modctl *);

 extern int fbt_enable (void *arg, dtrace_id_t id, void *parg);

 extern bool fbt_module_excluded(struct modctl*);

 extern bool fbt_excluded(const char *);

 extern void fbt_blacklist_init(void);

 extern void fbt_provide_probe(struct modctl *ctl, const char *modname, const char *name, machine_inst_t *instr, machine_inst_t *limit);

74 #endif /* _FBT_H */