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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===--- ARMEHABI.h - ARM Exception Handling ABI ----------------*- C++ -*-===// |
| 2 | // |
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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 |
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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 | |||
| 21 | #ifndef LLVM_SUPPORT_ARMEHABI_H |
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| 22 | #define LLVM_SUPPORT_ARMEHABI_H |
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| 23 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 70 | // Format: 10110000 |
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| 71 | // Purpose: finish |
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| 72 | UNWIND_OPCODE_FINISH = 0xb0, |
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| 73 | |||
| 74 | // Format: 10110100 |
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| 75 | // Purpose: Pop Return Address Authetication Code |
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| 76 | UNWIND_OPCODE_POP_RA_AUTH_CODE = 0xb4, |
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| 77 | |||
| 78 | // Format: 10110001 0000xxxx |
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| 79 | // Purpose: pop r[3:0] |
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| 80 | // Constraint: x != 0 |
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| 81 | UNWIND_OPCODE_POP_REG_MASK = 0xb100, |
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| 82 | |||
| 83 | // Format: 10110010 x(uleb128) |
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| 84 | // Purpose: vsp = vsp + ((x << 2) + 0x204) |
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| 85 | UNWIND_OPCODE_INC_VSP_ULEB128 = 0xb2, |
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| 86 | |||
| 87 | // Format: 10110011 xxxxyyyy |
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| 88 | // Purpose: pop d[(x+y):x] |
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| 89 | UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX = 0xb300, |
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| 90 | |||
| 91 | // Format: 10111xxx |
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| 92 | // Purpose: pop d[(8+x):8] |
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| 93 | UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX_D8 = 0xb8, |
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| 94 | |||
| 95 | // Format: 11000xxx |
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| 96 | // Purpose: pop wR[(10+x):10] |
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| 97 | UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE_WR10 = 0xc0, |
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| 98 | |||
| 99 | // Format: 11000110 xxxxyyyy |
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| 100 | // Purpose: pop wR[(x+y):x] |
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| 101 | UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE = 0xc600, |
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| 102 | |||
| 103 | // Format: 11000111 0000xxxx |
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| 104 | // Purpose: pop wCGR[3:0] |
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| 105 | // Constraint: x != 0 |
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| 106 | UNWIND_OPCODE_POP_WIRELESS_MMX_REG_MASK = 0xc700, |
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| 107 | |||
| 108 | // Format: 11001000 xxxxyyyy |
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| 109 | // Purpose: pop d[(16+x+y):(16+x)] |
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| 110 | UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D16 = 0xc800, |
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| 111 | |||
| 112 | // Format: 11001001 xxxxyyyy |
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| 113 | // Purpose: pop d[(x+y):x] |
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| 114 | UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD = 0xc900, |
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| 115 | |||
| 116 | // Format: 11010xxx |
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| 117 | // Purpose: pop d[(8+x):8] |
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| 118 | UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D8 = 0xd0 |
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| 119 | }; |
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| 120 | |||
| 121 | /// ARM-defined Personality Routine Index |
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| 122 | enum PersonalityRoutineIndex { |
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| 123 | // To make the exception handling table become more compact, ARM defined |
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| 124 | // several personality routines in EHABI. There are 3 different |
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| 125 | // personality routines in ARM EHABI currently. It is possible to have 16 |
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| 126 | // pre-defined personality routines at most. |
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| 127 | AEABI_UNWIND_CPP_PR0 = 0, |
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| 128 | AEABI_UNWIND_CPP_PR1 = 1, |
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| 129 | AEABI_UNWIND_CPP_PR2 = 2, |
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| 130 | |||
| 131 | NUM_PERSONALITY_INDEX |
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| 132 | }; |
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| 133 | } |
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| 134 | } |
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| 135 | } |
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| 136 | |||
| 137 | #endif |