1 //===--- ARMEHABI.h - ARM Exception Handling ABI ----------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines the constants for the ARM unwind opcodes and exception 11 // handling table entry kinds. 12 // 13 // The enumerations and constants in this file reflect the ARM EHABI 14 // Specification as published by ARM. 15 // 16 // Exception Handling ABI for the ARM Architecture r2.09 - November 30, 2012 17 // 18 // http://infocenter.arm.com/help/topic/com.arm.doc.ihi0038a/IHI0038A_ehabi.pdf 19 // 20 //===----------------------------------------------------------------------===// 21 22 #ifndef LLVM_SUPPORT_ARMEHABI_H 23 #define LLVM_SUPPORT_ARMEHABI_H 24 25 namespace llvm { 26 namespace ARM { 27 namespace EHABI { 28 /// ARM exception handling table entry kinds 29 enum EHTEntryKind { 30 EHT_GENERIC = 0x00, 31 EHT_COMPACT = 0x80 32 }; 33 34 enum { 35 /// Special entry for the function never unwind 36 EXIDX_CANTUNWIND = 0x1 37 }; 38 39 /// ARM-defined frame unwinding opcodes 40 enum UnwindOpcodes { 41 // Format: 00xxxxxx 42 // Purpose: vsp = vsp + ((x << 2) + 4) 43 UNWIND_OPCODE_INC_VSP = 0x00, 44 45 // Format: 01xxxxxx 46 // Purpose: vsp = vsp - ((x << 2) + 4) 47 UNWIND_OPCODE_DEC_VSP = 0x40, 48 49 // Format: 10000000 00000000 50 // Purpose: refuse to unwind 51 UNWIND_OPCODE_REFUSE = 0x8000, 52 53 // Format: 1000xxxx xxxxxxxx 54 // Purpose: pop r[15:12], r[11:4] 55 // Constraint: x != 0 56 UNWIND_OPCODE_POP_REG_MASK_R4 = 0x8000, 57 58 // Format: 1001xxxx 59 // Purpose: vsp = r[x] 60 // Constraint: x != 13 && x != 15 61 UNWIND_OPCODE_SET_VSP = 0x90, 62 63 // Format: 10100xxx 64 // Purpose: pop r[(4+x):4] 65 UNWIND_OPCODE_POP_REG_RANGE_R4 = 0xa0, 66 67 // Format: 10101xxx 68 // Purpose: pop r14, r[(4+x):4] 69 UNWIND_OPCODE_POP_REG_RANGE_R4_R14 = 0xa8, 70 71 // Format: 10110000 72 // Purpose: finish 73 UNWIND_OPCODE_FINISH = 0xb0, 74 75 // Format: 10110001 0000xxxx 76 // Purpose: pop r[3:0] 77 // Constraint: x != 0 78 UNWIND_OPCODE_POP_REG_MASK = 0xb100, 79 80 // Format: 10110010 x(uleb128) 81 // Purpose: vsp = vsp + ((x << 2) + 0x204) 82 UNWIND_OPCODE_INC_VSP_ULEB128 = 0xb2, 83 84 // Format: 10110011 xxxxyyyy 85 // Purpose: pop d[(x+y):x] 86 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX = 0xb300, 87 88 // Format: 10111xxx 89 // Purpose: pop d[(8+x):8] 90 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX_D8 = 0xb8, 91 92 // Format: 11000xxx 93 // Purpose: pop wR[(10+x):10] 94 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE_WR10 = 0xc0, 95 96 // Format: 11000110 xxxxyyyy 97 // Purpose: pop wR[(x+y):x] 98 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE = 0xc600, 99 100 // Format: 11000111 0000xxxx 101 // Purpose: pop wCGR[3:0] 102 // Constraint: x != 0 103 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_MASK = 0xc700, 104 105 // Format: 11001000 xxxxyyyy 106 // Purpose: pop d[(16+x+y):(16+x)] 107 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D16 = 0xc800, 108 109 // Format: 11001001 xxxxyyyy 110 // Purpose: pop d[(x+y):x] 111 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD = 0xc900, 112 113 // Format: 11010xxx 114 // Purpose: pop d[(8+x):8] 115 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D8 = 0xd0 116 }; 117 118 /// ARM-defined Personality Routine Index 119 enum PersonalityRoutineIndex { 120 // To make the exception handling table become more compact, ARM defined 121 // several personality routines in EHABI. There are 3 different 122 // personality routines in ARM EHABI currently. It is possible to have 16 123 // pre-defined personality routines at most. 124 AEABI_UNWIND_CPP_PR0 = 0, 125 AEABI_UNWIND_CPP_PR1 = 1, 126 AEABI_UNWIND_CPP_PR2 = 2, 127 128 NUM_PERSONALITY_INDEX 129 }; 130 } 131 } 132 } 133 134 #endif 135
