src/trusted/validator/x86/ncval_reg_sfi/nc_postconds.c - 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) 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 #include "native_client/src/trusted/validator/x86/ncval_reg_sfi/nc_postconds.h"

8

9 #include "native_client/src/include/portability_io.h"

10 #include "native_client/src/shared/platform/nacl_log.h"

11 #include "native_client/src/trusted/validator/x86/decoder/ncop_exps.h"

12 #include "native_client/src/trusted/validator/x86/decoder/nc_inst_state.h"

13 #include "native_client/src/trusted/validator/x86/decoder/nc_inst_trans.h"

14 #include "native_client/src/trusted/validator/x86/ncval_reg_sfi/ncvalidate_iter. h"

15 #include "native_client/src/trusted/validator/x86/ncval_reg_sfi/ncvalidate_iter_ internal.h"

16 #include "native_client/src/trusted/validator/x86/ncval_reg_sfi/ncvalidate_utils .h"

17 #include "native_client/src/trusted/validator/x86/ncval_reg_sfi/nc_memory_protec t.h"

18

19 /* To turn on debugging of instruction decoding, change value of

20 * DEBUGGING to 1.

21 */

22 #define DEBUGGING 0

23

24 #include "native_client/src/shared/utils/debugging.h"

25

26 #include "native_client/src/trusted/validator/x86/decoder/ncop_exps_inl.c"

27

28 /* Maximum character buffer size to use for generating messages. */

29 static const size_t kMaxBufferSize = 1024;

30

31 #ifdef NCVAL_TESTING

32 void NaClAddAssignsRegisterWithZeroExtendsPostconds(

33 struct NaClValidatorState* state) {

34 uint32_t i;

35 NaClExpVector* vector = state->cur_inst_vector;

36

37 DEBUG(NaClValidatorInstMessage(

38 LOG_INFO, state, state->cur_inst_state,

39 "-> Checking ZeroExtends postconditions...\n"));

40

41 /* Look for assignments to 32-bit registers for instructions that

42 * zero extend.

43 */

44 for (i = 0; i < vector->number_expr_nodes; ++i) {

45 NaClExp* node = &vector->node[i];

46 NaClOpKind node_reg;

47 if (ExprRegister != node->kind) continue;

48 if (!NaClHasBit(node->flags, NACL_EFLAG(ExprSet))) continue;

49 if (!NaClHasBit(node->flags, NACL_EFLAG(ExprSize32))) continue;

50 node_reg = NaClGetExpRegisterInline(node);

51 if (node_reg == RegUnknown) continue;

52 if (NaClAssignsRegisterWithZeroExtends32(state, 0, node_reg)) {

53 char* buffer;

54 size_t buffer_size;

55 char reg_name[kMaxBufferSize];

56 NaClOpRegName(node_reg, reg_name, kMaxBufferSize);

57 NaClConditionAppend(state->postcond, &buffer, &buffer_size);

58 SNPRINTF(buffer, buffer_size, "ZeroExtends(%s)", reg_name);

59 }

60 }

61 DEBUG(NaClValidatorMessage(

62 LOG_INFO, state, "<- Finished ZeroExtends postconditions...\n"));

63 }

64

65 void NaClAddLeaSafeAddressPostconds(

66 struct NaClValidatorState* state) {

67 uint32_t i;

68 NaClExpVector* vector = state->cur_inst_vector;

69 DEBUG(NaClValidatorInstMessage(

70 LOG_INFO, state, state->cur_inst_state,

71 "Checking SafeAddress postconditions...\n"));

72

73 /* Look for assignments to registers. */

74 for (i = 0; i < vector->number_expr_nodes; ++i) {

75 NaClOpKind reg;

76 NaClExp* node = &vector->node[i];

77 if (ExprRegister != node->kind) continue;

78 if (!NaClHasBit(node->flags, NACL_EFLAG(ExprSet))) continue;

79 if (!NaClHasBit(node->flags, NACL_EFLAG(ExprSize64))) continue;

80 reg = NaClGetExpRegisterInline(node);

81 if (RegUnknown == reg) continue;

82 if ((reg == RegRSP) \|\| (reg == RegRBP)) {

83 /* Note: Do not need to check safe addresses computed

84 * by "LEA Rsp/Rbp ...". Currently, these two registers

85 * are already checked.. See NaClCheckRspAssignments and

86 * NaClCheckRbpAssignments in nc_protect_base.c for more

87 * information on how such LEA instructions are checked.

88 */

89 if (InstLea != NaClInstStateInst(state->cur_inst_state)->name) {

90 NaClAcceptLeaWithMoveLea32To64(state, reg);

91 }

92 } else if (NaClAcceptLeaSafeAddress(state)) {

93 char* buffer;

94 size_t buffer_size;

95 char reg_name[kMaxBufferSize];

96 NaClOpRegName(reg, reg_name, kMaxBufferSize);

97 NaClConditionAppend(state->postcond, &buffer, &buffer_size);

98 SNPRINTF(buffer, buffer_size, "SafeAddress(%s)", reg_name);

99 }

100 }

101 DEBUG(NaClValidatorMessage(

102 LOG_INFO, state, "Finished SafeAddress postconditions...\n"));

103 }

104

105 #endif

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