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-rw-r--r--arch/x86/include/asm/inat.h188
-rw-r--r--arch/x86/include/asm/inat_types.h29
-rw-r--r--arch/x86/include/asm/insn.h143
3 files changed, 360 insertions, 0 deletions
diff --git a/arch/x86/include/asm/inat.h b/arch/x86/include/asm/inat.h
new file mode 100644
index 000000000000..2866fddd1848
--- /dev/null
+++ b/arch/x86/include/asm/inat.h
@@ -0,0 +1,188 @@
1#ifndef _ASM_X86_INAT_H
2#define _ASM_X86_INAT_H
3/*
4 * x86 instruction attributes
5 *
6 * Written by Masami Hiramatsu <mhiramat@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 */
23#include <asm/inat_types.h>
24
25/*
26 * Internal bits. Don't use bitmasks directly, because these bits are
27 * unstable. You should use checking functions.
28 */
29
30#define INAT_OPCODE_TABLE_SIZE 256
31#define INAT_GROUP_TABLE_SIZE 8
32
33/* Legacy instruction prefixes */
34#define INAT_PFX_OPNDSZ 1 /* 0x66 */ /* LPFX1 */
35#define INAT_PFX_REPNE 2 /* 0xF2 */ /* LPFX2 */
36#define INAT_PFX_REPE 3 /* 0xF3 */ /* LPFX3 */
37#define INAT_PFX_LOCK 4 /* 0xF0 */
38#define INAT_PFX_CS 5 /* 0x2E */
39#define INAT_PFX_DS 6 /* 0x3E */
40#define INAT_PFX_ES 7 /* 0x26 */
41#define INAT_PFX_FS 8 /* 0x64 */
42#define INAT_PFX_GS 9 /* 0x65 */
43#define INAT_PFX_SS 10 /* 0x36 */
44#define INAT_PFX_ADDRSZ 11 /* 0x67 */
45
46#define INAT_LPREFIX_MAX 3
47
48/* Immediate size */
49#define INAT_IMM_BYTE 1
50#define INAT_IMM_WORD 2
51#define INAT_IMM_DWORD 3
52#define INAT_IMM_QWORD 4
53#define INAT_IMM_PTR 5
54#define INAT_IMM_VWORD32 6
55#define INAT_IMM_VWORD 7
56
57/* Legacy prefix */
58#define INAT_PFX_OFFS 0
59#define INAT_PFX_BITS 4
60#define INAT_PFX_MAX ((1 << INAT_PFX_BITS) - 1)
61#define INAT_PFX_MASK (INAT_PFX_MAX << INAT_PFX_OFFS)
62/* Escape opcodes */
63#define INAT_ESC_OFFS (INAT_PFX_OFFS + INAT_PFX_BITS)
64#define INAT_ESC_BITS 2
65#define INAT_ESC_MAX ((1 << INAT_ESC_BITS) - 1)
66#define INAT_ESC_MASK (INAT_ESC_MAX << INAT_ESC_OFFS)
67/* Group opcodes (1-16) */
68#define INAT_GRP_OFFS (INAT_ESC_OFFS + INAT_ESC_BITS)
69#define INAT_GRP_BITS 5
70#define INAT_GRP_MAX ((1 << INAT_GRP_BITS) - 1)
71#define INAT_GRP_MASK (INAT_GRP_MAX << INAT_GRP_OFFS)
72/* Immediates */
73#define INAT_IMM_OFFS (INAT_GRP_OFFS + INAT_GRP_BITS)
74#define INAT_IMM_BITS 3
75#define INAT_IMM_MASK (((1 << INAT_IMM_BITS) - 1) << INAT_IMM_OFFS)
76/* Flags */
77#define INAT_FLAG_OFFS (INAT_IMM_OFFS + INAT_IMM_BITS)
78#define INAT_REXPFX (1 << INAT_FLAG_OFFS)
79#define INAT_MODRM (1 << (INAT_FLAG_OFFS + 1))
80#define INAT_FORCE64 (1 << (INAT_FLAG_OFFS + 2))
81#define INAT_SCNDIMM (1 << (INAT_FLAG_OFFS + 3))
82#define INAT_MOFFSET (1 << (INAT_FLAG_OFFS + 4))
83#define INAT_VARIANT (1 << (INAT_FLAG_OFFS + 5))
84/* Attribute making macros for attribute tables */
85#define INAT_MAKE_PREFIX(pfx) (pfx << INAT_PFX_OFFS)
86#define INAT_MAKE_ESCAPE(esc) (esc << INAT_ESC_OFFS)
87#define INAT_MAKE_GROUP(grp) ((grp << INAT_GRP_OFFS) | INAT_MODRM)
88#define INAT_MAKE_IMM(imm) (imm << INAT_IMM_OFFS)
89
90/* Attribute search APIs */
91extern insn_attr_t inat_get_opcode_attribute(insn_byte_t opcode);
92extern insn_attr_t inat_get_escape_attribute(insn_byte_t opcode,
93 insn_byte_t last_pfx,
94 insn_attr_t esc_attr);
95extern insn_attr_t inat_get_group_attribute(insn_byte_t modrm,
96 insn_byte_t last_pfx,
97 insn_attr_t esc_attr);
98
99/* Attribute checking functions */
100static inline int inat_is_prefix(insn_attr_t attr)
101{
102 return attr & INAT_PFX_MASK;
103}
104
105static inline int inat_is_address_size_prefix(insn_attr_t attr)
106{
107 return (attr & INAT_PFX_MASK) == INAT_PFX_ADDRSZ;
108}
109
110static inline int inat_is_operand_size_prefix(insn_attr_t attr)
111{
112 return (attr & INAT_PFX_MASK) == INAT_PFX_OPNDSZ;
113}
114
115static inline int inat_last_prefix_id(insn_attr_t attr)
116{
117 if ((attr & INAT_PFX_MASK) > INAT_LPREFIX_MAX)
118 return 0;
119 else
120 return attr & INAT_PFX_MASK;
121}
122
123static inline int inat_is_escape(insn_attr_t attr)
124{
125 return attr & INAT_ESC_MASK;
126}
127
128static inline int inat_escape_id(insn_attr_t attr)
129{
130 return (attr & INAT_ESC_MASK) >> INAT_ESC_OFFS;
131}
132
133static inline int inat_is_group(insn_attr_t attr)
134{
135 return attr & INAT_GRP_MASK;
136}
137
138static inline int inat_group_id(insn_attr_t attr)
139{
140 return (attr & INAT_GRP_MASK) >> INAT_GRP_OFFS;
141}
142
143static inline int inat_group_common_attribute(insn_attr_t attr)
144{
145 return attr & ~INAT_GRP_MASK;
146}
147
148static inline int inat_has_immediate(insn_attr_t attr)
149{
150 return attr & INAT_IMM_MASK;
151}
152
153static inline int inat_immediate_size(insn_attr_t attr)
154{
155 return (attr & INAT_IMM_MASK) >> INAT_IMM_OFFS;
156}
157
158static inline int inat_is_rex_prefix(insn_attr_t attr)
159{
160 return attr & INAT_REXPFX;
161}
162
163static inline int inat_has_modrm(insn_attr_t attr)
164{
165 return attr & INAT_MODRM;
166}
167
168static inline int inat_is_force64(insn_attr_t attr)
169{
170 return attr & INAT_FORCE64;
171}
172
173static inline int inat_has_second_immediate(insn_attr_t attr)
174{
175 return attr & INAT_SCNDIMM;
176}
177
178static inline int inat_has_moffset(insn_attr_t attr)
179{
180 return attr & INAT_MOFFSET;
181}
182
183static inline int inat_has_variant(insn_attr_t attr)
184{
185 return attr & INAT_VARIANT;
186}
187
188#endif
diff --git a/arch/x86/include/asm/inat_types.h b/arch/x86/include/asm/inat_types.h
new file mode 100644
index 000000000000..cb3c20ce39cf
--- /dev/null
+++ b/arch/x86/include/asm/inat_types.h
@@ -0,0 +1,29 @@
1#ifndef _ASM_X86_INAT_TYPES_H
2#define _ASM_X86_INAT_TYPES_H
3/*
4 * x86 instruction attributes
5 *
6 * Written by Masami Hiramatsu <mhiramat@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 */
23
24/* Instruction attributes */
25typedef unsigned int insn_attr_t;
26typedef unsigned char insn_byte_t;
27typedef signed int insn_value_t;
28
29#endif
diff --git a/arch/x86/include/asm/insn.h b/arch/x86/include/asm/insn.h
new file mode 100644
index 000000000000..12b4e3751d3f
--- /dev/null
+++ b/arch/x86/include/asm/insn.h
@@ -0,0 +1,143 @@
1#ifndef _ASM_X86_INSN_H
2#define _ASM_X86_INSN_H
3/*
4 * x86 instruction analysis
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *
20 * Copyright (C) IBM Corporation, 2009
21 */
22
23/* insn_attr_t is defined in inat.h */
24#include <asm/inat.h>
25
26struct insn_field {
27 union {
28 insn_value_t value;
29 insn_byte_t bytes[4];
30 };
31 /* !0 if we've run insn_get_xxx() for this field */
32 unsigned char got;
33 unsigned char nbytes;
34};
35
36struct insn {
37 struct insn_field prefixes; /*
38 * Prefixes
39 * prefixes.bytes[3]: last prefix
40 */
41 struct insn_field rex_prefix; /* REX prefix */
42 struct insn_field opcode; /*
43 * opcode.bytes[0]: opcode1
44 * opcode.bytes[1]: opcode2
45 * opcode.bytes[2]: opcode3
46 */
47 struct insn_field modrm;
48 struct insn_field sib;
49 struct insn_field displacement;
50 union {
51 struct insn_field immediate;
52 struct insn_field moffset1; /* for 64bit MOV */
53 struct insn_field immediate1; /* for 64bit imm or off16/32 */
54 };
55 union {
56 struct insn_field moffset2; /* for 64bit MOV */
57 struct insn_field immediate2; /* for 64bit imm or seg16 */
58 };
59
60 insn_attr_t attr;
61 unsigned char opnd_bytes;
62 unsigned char addr_bytes;
63 unsigned char length;
64 unsigned char x86_64;
65
66 const insn_byte_t *kaddr; /* kernel address of insn to analyze */
67 const insn_byte_t *next_byte;
68};
69
70#define X86_MODRM_MOD(modrm) (((modrm) & 0xc0) >> 6)
71#define X86_MODRM_REG(modrm) (((modrm) & 0x38) >> 3)
72#define X86_MODRM_RM(modrm) ((modrm) & 0x07)
73
74#define X86_SIB_SCALE(sib) (((sib) & 0xc0) >> 6)
75#define X86_SIB_INDEX(sib) (((sib) & 0x38) >> 3)
76#define X86_SIB_BASE(sib) ((sib) & 0x07)
77
78#define X86_REX_W(rex) ((rex) & 8)
79#define X86_REX_R(rex) ((rex) & 4)
80#define X86_REX_X(rex) ((rex) & 2)
81#define X86_REX_B(rex) ((rex) & 1)
82
83/* The last prefix is needed for two-byte and three-byte opcodes */
84static inline insn_byte_t insn_last_prefix(struct insn *insn)
85{
86 return insn->prefixes.bytes[3];
87}
88
89extern void insn_init(struct insn *insn, const void *kaddr, int x86_64);
90extern void insn_get_prefixes(struct insn *insn);
91extern void insn_get_opcode(struct insn *insn);
92extern void insn_get_modrm(struct insn *insn);
93extern void insn_get_sib(struct insn *insn);
94extern void insn_get_displacement(struct insn *insn);
95extern void insn_get_immediate(struct insn *insn);
96extern void insn_get_length(struct insn *insn);
97
98/* Attribute will be determined after getting ModRM (for opcode groups) */
99static inline void insn_get_attribute(struct insn *insn)
100{
101 insn_get_modrm(insn);
102}
103
104/* Instruction uses RIP-relative addressing */
105extern int insn_rip_relative(struct insn *insn);
106
107/* Init insn for kernel text */
108static inline void kernel_insn_init(struct insn *insn, const void *kaddr)
109{
110#ifdef CONFIG_X86_64
111 insn_init(insn, kaddr, 1);
112#else /* CONFIG_X86_32 */
113 insn_init(insn, kaddr, 0);
114#endif
115}
116
117/* Offset of each field from kaddr */
118static inline int insn_offset_rex_prefix(struct insn *insn)
119{
120 return insn->prefixes.nbytes;
121}
122static inline int insn_offset_opcode(struct insn *insn)
123{
124 return insn_offset_rex_prefix(insn) + insn->rex_prefix.nbytes;
125}
126static inline int insn_offset_modrm(struct insn *insn)
127{
128 return insn_offset_opcode(insn) + insn->opcode.nbytes;
129}
130static inline int insn_offset_sib(struct insn *insn)
131{
132 return insn_offset_modrm(insn) + insn->modrm.nbytes;
133}
134static inline int insn_offset_displacement(struct insn *insn)
135{
136 return insn_offset_sib(insn) + insn->sib.nbytes;
137}
138static inline int insn_offset_immediate(struct insn *insn)
139{
140 return insn_offset_displacement(insn) + insn->displacement.nbytes;
141}
142
143#endif /* _ASM_X86_INSN_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-18 22:59:50 -0500