src/trusted/validator/x86/decoder/generator/nc_compress.h - Issue 625923004: Delete old x86 validator.

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Issue 625923004: Delete old x86 validator. (Closed) Base URL: svn://svn.chromium.org/native_client/trunk/src/native_client

Patch Set: Created 6 years, 2 months ago

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1 /*

2 * Copyright (c) 2011 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 * API to compressing tables of modeled instructions.

9 */

10

11 #ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_GENERATOR_NC_COMPRESS_H_ _

12 #define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_GENERATOR_NC_COMPRESS_H_ _

13

14 #include "native_client/src/trusted/validator/x86/decoder/generator/ncdecode_tab legen.h"

15 #include "native_client/src/trusted/validator/x86/decoder/nc_decode_tables.h"

16

17 /* Define the maximum number of instruction operands (over

18 * all instructions) we will allow. Note: before compression,

19 * there should a little less than 3000 operands. Hence,

20 * 10000 is a (very) safe value to use as a limit, and should

21 * not need to be changed. Also, the table generator will

22 * complain (and then fail) if this number is exceeded. If that

23 * happens, update this constant as is appropriate.

24 */

25 #define NACL_MAX_OPERANDS_TOTAL 10000

26

27 /* Define the maximum number of instructions we will allow.

28 * Note: before compression there should be less than 3000

29 * instructions. Hence, 10000 is a (very) safe value to use

30 * as a limit, and should not need to be changed. Also, the

31 * table generator will complain (and then fail) if this number

32 * is exceeded. If that happens, update this constant as

33 * is appropriate.

34 */

35 #define NACL_MAX_INSTRUCTIONS_TOTAL 10000

36

37 /* Define the maximum number of prefix/opcode entries that

38 * we will allow. Note: before compression there are

39 * 256 * NaClInstPrefixEnumSize(19) = 4864 entries.

40 * Hence, 100000 is a (very) safe value to use as a limit,

41 * and should not need to be changed. Also, the

42 * table generator will complain (and then fail) if this number

43 * is exceeded. If that happens, update this constant as

44 * is appropriate.

45 */

46 #define NACL_MAX_PREFIX_OPCODE_ENTRIES 10000

47

48 /* The type for the array used to look up instructions, based on matched

49 * prefix selector and the corresponding (first) opcode byte.

50 */

51 typedef NaClModeledInst*

52 NaclModeledInstTableType[NCDTABLESIZE][NaClInstPrefixEnumSize];

53

54 /* The type for the array of compressed instructions. */

55 typedef NaClModeledInst*

56 NaclCompressedTableType[NACL_MAX_INSTRUCTIONS_TOTAL];

57

58 /* The type for the array of opcode lookup entries. */

59 typedef NaClPrefixOpcodeArrayOffset

60 NaClCompressedOpcodeLookupType[NACL_MAX_PREFIX_OPCODE_ENTRIES];

61

62 /* Models the arrays used in table generation, and the corresponding

63 * tables used to model the compressed data.

64 */

65 typedef struct NaClInstTables {

66 /* The lookup table of posssible instructions, based on opcode and

67 * prefix selector.

68 */

69 NaClModeledInst* inst_table[NCDTABLESIZE][NaClInstPrefixEnumSize];

70 /* The root of the hard coded instructions. */

71 NaClModeledInstNode* inst_node_root;

72 /* The array of modeled set of operands defined for instructions. */

73 NaClOp operands[NACL_MAX_OPERANDS_TOTAL];

74 /* The number of operands in nacl_operands. */

75 size_t operands_size;

76 /* The instruction that models an undefined instruction. */

77 NaClModeledInst* undefined_inst;

78 /* The generated array of compressed operands. */

79 NaClOp ops_compressed[NACL_MAX_OPERANDS_TOTAL];

80 /* The number of compressed operands added to ops_compressed. */

81 size_t ops_compressed_size;

82 /* The generated array of compressed instructions. */

83 NaClModeledInst* inst_compressed[NACL_MAX_INSTRUCTIONS_TOTAL];

84 /* The number of compressed instructions added to inst_compressed. */

85 size_t inst_compressed_size;

86 /* The generated table of opcode lookup indicies. */

87 NaClOpcodeArrayOffset opcode_lookup[NACL_MAX_PREFIX_OPCODE_ENTRIES];

88 /* The size of array opcode_lookup. */

89 size_t opcode_lookup_size;

90 /* The generated table of entry points into opcode_lookup, for each

91 * possible prefix.

92 */

93 NaClPrefixOpcodeArrayOffset opcode_lookup_entry[NaClInstPrefixEnumSize];

94 /* The first non-null opcode value stored in the generated

95 * table opcode_lookup, for each possible prefix.

96 */

97 uint8_t opcode_lookup_first[NaClInstPrefixEnumSize];

98 /* The last non-null opcode vlaue stored in the generated

99 * table opcode_lookupk, for each possible prefix.

100 */

101 uint8_t opcode_lookup_last[NaClInstPrefixEnumSize];

102 } NaClInstTables;

103

104 /* Given the tables passed in, compresses instructions, operands,

105 * and prefix/opcode lookup tables.

106 */

107 void NaClOpCompress(NaClInstTables* inst_tables);

108

109 /* Given the tables passed in, return the index (in the compressed instruction

110 * array) associated with the given instruction.

111 */

112 NaClOpcodeArrayOffset NaClFindInstIndex(NaClInstTables* inst_tables,

113 const NaClModeledInst* inst);

114

115 #endif /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_GENERATOR_NC_COMPRESS _H__ */

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