1 //===-- ARMUnwindOp.h - ARM Unwind Opcodes ----------------------*- 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 //===----------------------------------------------------------------------===// 14 15 #ifndef ARM_UNWIND_OP_H 16 #define ARM_UNWIND_OP_H 17 18 namespace llvm { 19 20 /// ARM exception handling table entry kinds 21 enum ARMEHTEntryKind { 22 EHT_GENERIC = 0x00, 23 EHT_COMPACT = 0x80 24 }; 25 26 enum { 27 /// Special entry for the function never unwind 28 EXIDX_CANTUNWIND = 0x1 29 }; 30 31 /// ARM-defined frame unwinding opcodes 32 enum ARMUnwindOpcodes { 33 // Format: 00xxxxxx 34 // Purpose: vsp = vsp + ((x << 2) + 4) 35 UNWIND_OPCODE_INC_VSP = 0x00, 36 37 // Format: 01xxxxxx 38 // Purpose: vsp = vsp - ((x << 2) + 4) 39 UNWIND_OPCODE_DEC_VSP = 0x40, 40 41 // Format: 10000000 00000000 42 // Purpose: refuse to unwind 43 UNWIND_OPCODE_REFUSE = 0x8000, 44 45 // Format: 1000xxxx xxxxxxxx 46 // Purpose: pop r[15:12], r[11:4] 47 // Constraint: x != 0 48 UNWIND_OPCODE_POP_REG_MASK_R4 = 0x8000, 49 50 // Format: 1001xxxx 51 // Purpose: vsp = r[x] 52 // Constraint: x != 13 && x != 15 53 UNWIND_OPCODE_SET_VSP = 0x90, 54 55 // Format: 10100xxx 56 // Purpose: pop r[(4+x):4] 57 UNWIND_OPCODE_POP_REG_RANGE_R4 = 0xa0, 58 59 // Format: 10101xxx 60 // Purpose: pop r14, r[(4+x):4] 61 UNWIND_OPCODE_POP_REG_RANGE_R4_R14 = 0xa8, 62 63 // Format: 10110000 64 // Purpose: finish 65 UNWIND_OPCODE_FINISH = 0xb0, 66 67 // Format: 10110001 0000xxxx 68 // Purpose: pop r[3:0] 69 // Constraint: x != 0 70 UNWIND_OPCODE_POP_REG_MASK = 0xb100, 71 72 // Format: 10110010 x(uleb128) 73 // Purpose: vsp = vsp + ((x << 2) + 0x204) 74 UNWIND_OPCODE_INC_VSP_ULEB128 = 0xb2, 75 76 // Format: 10110011 xxxxyyyy 77 // Purpose: pop d[(x+y):x] 78 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX = 0xb300, 79 80 // Format: 10111xxx 81 // Purpose: pop d[(8+x):8] 82 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX_D8 = 0xb8, 83 84 // Format: 11000xxx 85 // Purpose: pop wR[(10+x):10] 86 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE_WR10 = 0xc0, 87 88 // Format: 11000110 xxxxyyyy 89 // Purpose: pop wR[(x+y):x] 90 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE = 0xc600, 91 92 // Format: 11000111 0000xxxx 93 // Purpose: pop wCGR[3:0] 94 // Constraint: x != 0 95 UNWIND_OPCODE_POP_WIRELESS_MMX_REG_MASK = 0xc700, 96 97 // Format: 11001000 xxxxyyyy 98 // Purpose: pop d[(16+x+y):(16+x)] 99 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D16 = 0xc800, 100 101 // Format: 11001001 xxxxyyyy 102 // Purpose: pop d[(x+y):x] 103 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD = 0xc900, 104 105 // Format: 11010xxx 106 // Purpose: pop d[(8+x):8] 107 UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D8 = 0xd0 108 }; 109 110 } 111 112 #endif // ARM_UNWIND_OP_H 113