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Side by Side Diff: src/trusted/validator_ragel/unreviewed/decoder_internal.h

Issue 11000033: Move validator_x86_XX.rl out of unreviewed. (Closed) Base URL: svn://svn.chromium.org/native_client/trunk/src/native_client/
Patch Set: Created 7 years, 9 months ago
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1 /*
2 * Copyright (c) 2012 The Native Client Authors. All rights reserved.
3 * Use of this source code is governed by a BSD-style license that can be
4 * found in the LICENSE file.
5 */
6
7 /*
8 * This file contains common parts of x86-32 and x86-64 internals (inline
9 * functions and defines).
10 */
11
12 #ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_
13 #define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_
14
15 #include "native_client/src/trusted/validator_ragel/unreviewed/decoding.h"
16
17 /*
18 * Set of macroses used in actions defined in parse_instruction.rl to pull
19 * parts of the instruction from a byte stream and store them for future use.
20 */
21 #define GET_REX_PREFIX() instruction.prefix.rex
22 #define GET_VEX_PREFIX2() vex_prefix2
23 #define GET_VEX_PREFIX3() vex_prefix3
24 #define SET_VEX_PREFIX3(P) vex_prefix3 = (P)
25 #define SET_DATA16_PREFIX(S) instruction.prefix.data16 = (S)
26 #define SET_LOCK_PREFIX(S) instruction.prefix.lock = (S)
27 #define SET_REPZ_PREFIX(S) instruction.prefix.repz = (S)
28 #define SET_REPNZ_PREFIX(S) instruction.prefix.repnz = (S)
29 #define SET_BRANCH_TAKEN(S) instruction.prefix.branch_taken = (S)
30 #define SET_BRANCH_NOT_TAKEN(S) instruction.prefix.branch_not_taken = (S)
31 #define SET_INSTRUCTION_NAME(N) instruction.name = (N)
32 #define GET_OPERAND_NAME(N) instruction.operands[(N)].name
33 #define SET_OPERAND_NAME(N, S) instruction.operands[(N)].name = (S)
34 #define SET_OPERAND_FORMAT(N, S) instruction.operands[(N)].format = (S)
35 #define SET_OPERANDS_COUNT(N) instruction.operands_count = (N)
36 #define SET_MODRM_BASE(N) instruction.rm.base = (N)
37 #define SET_MODRM_INDEX(N) instruction.rm.index = (N)
38 #define SET_MODRM_SCALE(S) instruction.rm.scale = (S)
39 #define SET_DISP_TYPE(T) instruction.rm.disp_type = (T)
40 #define SET_DISP_PTR(P) \
41 instruction.rm.offset = DecodeDisplacementValue(instruction.rm.disp_type, (P))
42 #define SET_IMM_TYPE(T) imm_operand = (T)
43 #define SET_IMM_PTR(P) \
44 instruction.imm[0] = DecodeImmediateValue(imm_operand, (P))
45 #define SET_IMM2_TYPE(T) imm2_operand = (T)
46 #define SET_IMM2_PTR(P) \
47 instruction.imm[1] = DecodeImmediateValue(imm2_operand, (P))
48 #define SET_CPU_FEATURE(F)
49 #define SET_ATT_INSTRUCTION_SUFFIX(S) instruction.att_instruction_suffix = (S)
50
51 /*
52 * Immediate mode: size of the instruction's immediate operand. Note that there
53 * IMMNONE (which means there are no immediate operand) and IMM2 (which is
54 * two-bit immediate which shares it's byte with other operands).
55 */
56 enum ImmediateMode {
57 IMMNONE,
58 IMM2,
59 IMM8,
60 IMM16,
61 IMM32,
62 IMM64
63 };
64
65 static FORCEINLINE uint64_t DecodeDisplacementValue(
66 enum DisplacementMode disp_mode, const uint8_t *disp_ptr) {
67 switch(disp_mode) {
68 case DISPNONE: return 0;
69 case DISP8: return SignExtend8Bit(AnyFieldValue8bit(disp_ptr));
70 case DISP16: return SignExtend16Bit(AnyFieldValue16bit(disp_ptr));
71 case DISP32: return SignExtend32Bit(AnyFieldValue32bit(disp_ptr));
72 case DISP64: return AnyFieldValue64bit(disp_ptr);
73 }
74 assert(FALSE);
75 return 0;
76 }
77
78
79 static FORCEINLINE uint64_t DecodeImmediateValue(enum ImmediateMode imm_mode,
80 const uint8_t *imm_ptr) {
81 switch(imm_mode) {
82 case IMMNONE: return 0;
83 case IMM2: return imm_ptr[0] & 0x03;
84 case IMM8: return AnyFieldValue8bit(imm_ptr);
85 case IMM16: return AnyFieldValue16bit(imm_ptr);
86 case IMM32: return AnyFieldValue32bit(imm_ptr);
87 case IMM64: return AnyFieldValue64bit(imm_ptr);
88 }
89 assert(FALSE);
90 return 0;
91 }
92
93 #endif /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_ */
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