xref: /illumos-gate/usr/src/uts/intel/sys/fasttrap_isa.h (revision 2d6eb4a5e0a47d30189497241345dc5466bb68ab)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef	_FASTTRAP_ISA_H
27 #define	_FASTTRAP_ISA_H
28 
29 #include <sys/types.h>
30 
31 #ifdef	__cplusplus
32 extern "C" {
33 #endif
34 
35 #define	FASTTRAP_MAX_INSTR_SIZE		15
36 
37 #define	FASTTRAP_INSTR			0xcc
38 
39 #define	FASTTRAP_SUNWDTRACE_SIZE	64
40 
41 typedef	uint8_t		fasttrap_instr_t;
42 
43 typedef struct fasttrap_machtp {
44 	uint8_t		ftmt_instr[FASTTRAP_MAX_INSTR_SIZE]; /* orig. instr. */
45 	uint8_t		ftmt_size;	/* instruction size */
46 #ifdef __amd64
47 	uint8_t		ftmt_ripmode;	/* %rip-relative handling mode */
48 	uint8_t		ftmt_modrm;	/* saved modrm byte */
49 #endif
50 	uint8_t		ftmt_type;	/* emulation type */
51 	uint8_t		ftmt_code;	/* branch condition */
52 	uint8_t		ftmt_base;	/* branch base */
53 	uint8_t		ftmt_index;	/* branch index */
54 	uint8_t		ftmt_scale;	/* branch scale */
55 	uint8_t		ftmt_segment;	/* segment for memory accesses */
56 	uintptr_t	ftmt_dest;	/* destination of control flow */
57 } fasttrap_machtp_t;
58 
59 #define	ftt_instr	ftt_mtp.ftmt_instr
60 #ifdef __amd64
61 #define	ftt_ripmode	ftt_mtp.ftmt_ripmode
62 #define	ftt_modrm	ftt_mtp.ftmt_modrm
63 #endif
64 #define	ftt_size	ftt_mtp.ftmt_size
65 #define	ftt_type	ftt_mtp.ftmt_type
66 #define	ftt_code	ftt_mtp.ftmt_code
67 #define	ftt_base	ftt_mtp.ftmt_base
68 #define	ftt_index	ftt_mtp.ftmt_index
69 #define	ftt_scale	ftt_mtp.ftmt_scale
70 #define	ftt_segment	ftt_mtp.ftmt_segment
71 #define	ftt_dest	ftt_mtp.ftmt_dest
72 
73 #define	FASTTRAP_T_COMMON	0x00	/* common case -- no emulation */
74 #define	FASTTRAP_T_JCC		0x01	/* near and far conditional jumps */
75 #define	FASTTRAP_T_LOOP		0x02	/* loop instructions */
76 #define	FASTTRAP_T_JCXZ		0x03	/* jump if %ecx/%rcx is zero */
77 #define	FASTTRAP_T_JMP		0x04	/* relative jump */
78 #define	FASTTRAP_T_CALL		0x05	/* near call (and link) */
79 #define	FASTTRAP_T_RET		0x06	/* ret */
80 #define	FASTTRAP_T_RET16	0x07	/* ret <imm16> */
81 
82 /*
83  * For performance rather than correctness.
84  */
85 #define	FASTTRAP_T_PUSHL_EBP	0x10	/* pushl %ebp (for function entry) */
86 #define	FASTTRAP_T_NOP		0x11	/* nop */
87 
88 #define	FASTTRAP_RIP_1		0x1
89 #define	FASTTRAP_RIP_2		0x2
90 #define	FASTTRAP_RIP_X		0x4
91 
92 /*
93  * Segment values.
94  */
95 #define	FASTTRAP_SEG_NONE		0
96 #define	FASTTRAP_SEG_CS			1
97 #define	FASTTRAP_SEG_DS			2
98 #define	FASTTRAP_SEG_ES			3
99 #define	FASTTRAP_SEG_FS			4
100 #define	FASTTRAP_SEG_GS			5
101 #define	FASTTRAP_SEG_SS			6
102 
103 #define	FASTTRAP_AFRAMES		3
104 #define	FASTTRAP_RETURN_AFRAMES		4
105 #define	FASTTRAP_ENTRY_AFRAMES		3
106 #define	FASTTRAP_OFFSET_AFRAMES		3
107 
108 #ifdef	__cplusplus
109 }
110 #endif
111 
112 #endif	/* _FASTTRAP_ISA_H */
113