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annotate include/llvm/Support/ARMEHABI.h @ 147:c2174574ed3a

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LLVM 10
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 16:55:33 +0900
parents 54457678186b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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77
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1 //===--- ARMEHABI.h - ARM Exception Handling ABI ----------------*- C++ -*-===//
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2 //
147
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
77
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file defines the constants for the ARM unwind opcodes and exception
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10 // handling table entry kinds.
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11 //
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12 // The enumerations and constants in this file reflect the ARM EHABI
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13 // Specification as published by ARM.
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14 //
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15 // Exception Handling ABI for the ARM Architecture r2.09 - November 30, 2012
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16 //
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17 // http://infocenter.arm.com/help/topic/com.arm.doc.ihi0038a/IHI0038A_ehabi.pdf
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18 //
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19 //===----------------------------------------------------------------------===//
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20
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21 #ifndef LLVM_SUPPORT_ARMEHABI_H
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22 #define LLVM_SUPPORT_ARMEHABI_H
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23
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24 namespace llvm {
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25 namespace ARM {
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26 namespace EHABI {
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27 /// ARM exception handling table entry kinds
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28 enum EHTEntryKind {
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29 EHT_GENERIC = 0x00,
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30 EHT_COMPACT = 0x80
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31 };
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32
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33 enum {
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34 /// Special entry for the function never unwind
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35 EXIDX_CANTUNWIND = 0x1
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36 };
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37
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38 /// ARM-defined frame unwinding opcodes
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39 enum UnwindOpcodes {
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40 // Format: 00xxxxxx
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41 // Purpose: vsp = vsp + ((x << 2) + 4)
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42 UNWIND_OPCODE_INC_VSP = 0x00,
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43
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44 // Format: 01xxxxxx
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45 // Purpose: vsp = vsp - ((x << 2) + 4)
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46 UNWIND_OPCODE_DEC_VSP = 0x40,
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47
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48 // Format: 10000000 00000000
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49 // Purpose: refuse to unwind
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50 UNWIND_OPCODE_REFUSE = 0x8000,
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51
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52 // Format: 1000xxxx xxxxxxxx
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53 // Purpose: pop r[15:12], r[11:4]
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54 // Constraint: x != 0
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55 UNWIND_OPCODE_POP_REG_MASK_R4 = 0x8000,
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56
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57 // Format: 1001xxxx
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58 // Purpose: vsp = r[x]
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59 // Constraint: x != 13 && x != 15
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60 UNWIND_OPCODE_SET_VSP = 0x90,
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61
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62 // Format: 10100xxx
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63 // Purpose: pop r[(4+x):4]
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64 UNWIND_OPCODE_POP_REG_RANGE_R4 = 0xa0,
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65
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66 // Format: 10101xxx
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67 // Purpose: pop r14, r[(4+x):4]
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68 UNWIND_OPCODE_POP_REG_RANGE_R4_R14 = 0xa8,
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69
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70 // Format: 10110000
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71 // Purpose: finish
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72 UNWIND_OPCODE_FINISH = 0xb0,
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73
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74 // Format: 10110001 0000xxxx
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75 // Purpose: pop r[3:0]
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76 // Constraint: x != 0
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77 UNWIND_OPCODE_POP_REG_MASK = 0xb100,
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78
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79 // Format: 10110010 x(uleb128)
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80 // Purpose: vsp = vsp + ((x << 2) + 0x204)
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81 UNWIND_OPCODE_INC_VSP_ULEB128 = 0xb2,
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82
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83 // Format: 10110011 xxxxyyyy
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84 // Purpose: pop d[(x+y):x]
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85 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX = 0xb300,
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86
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87 // Format: 10111xxx
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88 // Purpose: pop d[(8+x):8]
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89 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX_D8 = 0xb8,
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90
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91 // Format: 11000xxx
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92 // Purpose: pop wR[(10+x):10]
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93 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE_WR10 = 0xc0,
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94
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95 // Format: 11000110 xxxxyyyy
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96 // Purpose: pop wR[(x+y):x]
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97 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE = 0xc600,
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98
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99 // Format: 11000111 0000xxxx
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100 // Purpose: pop wCGR[3:0]
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101 // Constraint: x != 0
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102 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_MASK = 0xc700,
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103
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104 // Format: 11001000 xxxxyyyy
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105 // Purpose: pop d[(16+x+y):(16+x)]
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106 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D16 = 0xc800,
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107
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108 // Format: 11001001 xxxxyyyy
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109 // Purpose: pop d[(x+y):x]
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110 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD = 0xc900,
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111
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112 // Format: 11010xxx
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113 // Purpose: pop d[(8+x):8]
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114 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D8 = 0xd0
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115 };
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116
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117 /// ARM-defined Personality Routine Index
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118 enum PersonalityRoutineIndex {
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119 // To make the exception handling table become more compact, ARM defined
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120 // several personality routines in EHABI. There are 3 different
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121 // personality routines in ARM EHABI currently. It is possible to have 16
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122 // pre-defined personality routines at most.
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123 AEABI_UNWIND_CPP_PR0 = 0,
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124 AEABI_UNWIND_CPP_PR1 = 1,
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125 AEABI_UNWIND_CPP_PR2 = 2,
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126
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127 NUM_PERSONALITY_INDEX
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128 };
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129 }
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130 }
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131 }
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132
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133 #endif