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//===--- ARMEHABI.h - ARM Exception Handling ABI ----------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the constants for the ARM unwind opcodes and exception
// handling table entry kinds.
//
// The enumerations and constants in this file reflect the ARM EHABI
// Specification as published by ARM.
//
// Exception Handling ABI for the ARM Architecture r2.09 - November 30, 2012
//
// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0038a/IHI0038A_ehabi.pdf
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_ARM_EHABI_H
#define LLVM_SUPPORT_ARM_EHABI_H
namespace llvm {
namespace ARM {
namespace EHABI {
/// ARM exception handling table entry kinds
enum EHTEntryKind {
EHT_GENERIC = 0x00,
EHT_COMPACT = 0x80
};
enum {
/// Special entry for the function never unwind
EXIDX_CANTUNWIND = 0x1
};
/// ARM-defined frame unwinding opcodes
enum UnwindOpcodes {
// Format: 00xxxxxx
// Purpose: vsp = vsp + ((x << 2) + 4)
UNWIND_OPCODE_INC_VSP = 0x00,
// Format: 01xxxxxx
// Purpose: vsp = vsp - ((x << 2) + 4)
UNWIND_OPCODE_DEC_VSP = 0x40,
// Format: 10000000 00000000
// Purpose: refuse to unwind
UNWIND_OPCODE_REFUSE = 0x8000,
// Format: 1000xxxx xxxxxxxx
// Purpose: pop r[15:12], r[11:4]
// Constraint: x != 0
UNWIND_OPCODE_POP_REG_MASK_R4 = 0x8000,
// Format: 1001xxxx
// Purpose: vsp = r[x]
// Constraint: x != 13 && x != 15
UNWIND_OPCODE_SET_VSP = 0x90,
// Format: 10100xxx
// Purpose: pop r[(4+x):4]
UNWIND_OPCODE_POP_REG_RANGE_R4 = 0xa0,
// Format: 10101xxx
// Purpose: pop r14, r[(4+x):4]
UNWIND_OPCODE_POP_REG_RANGE_R4_R14 = 0xa8,
// Format: 10110000
// Purpose: finish
UNWIND_OPCODE_FINISH = 0xb0,
// Format: 10110001 0000xxxx
// Purpose: pop r[3:0]
// Constraint: x != 0
UNWIND_OPCODE_POP_REG_MASK = 0xb100,
// Format: 10110010 x(uleb128)
// Purpose: vsp = vsp + ((x << 2) + 0x204)
UNWIND_OPCODE_INC_VSP_ULEB128 = 0xb2,
// Format: 10110011 xxxxyyyy
// Purpose: pop d[(x+y):x]
UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX = 0xb300,
// Format: 10111xxx
// Purpose: pop d[(8+x):8]
UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDX_D8 = 0xb8,
// Format: 11000xxx
// Purpose: pop wR[(10+x):10]
UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE_WR10 = 0xc0,
// Format: 11000110 xxxxyyyy
// Purpose: pop wR[(x+y):x]
UNWIND_OPCODE_POP_WIRELESS_MMX_REG_RANGE = 0xc600,
// Format: 11000111 0000xxxx
// Purpose: pop wCGR[3:0]
// Constraint: x != 0
UNWIND_OPCODE_POP_WIRELESS_MMX_REG_MASK = 0xc700,
// Format: 11001000 xxxxyyyy
// Purpose: pop d[(16+x+y):(16+x)]
UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D16 = 0xc800,
// Format: 11001001 xxxxyyyy
// Purpose: pop d[(x+y):x]
UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD = 0xc900,
// Format: 11010xxx
// Purpose: pop d[(8+x):8]
UNWIND_OPCODE_POP_VFP_REG_RANGE_FSTMFDD_D8 = 0xd0
};
/// ARM-defined Personality Routine Index
enum PersonalityRoutineIndex {
// To make the exception handling table become more compact, ARM defined
// several personality routines in EHABI. There are 3 different
// personality routines in ARM EHABI currently. It is possible to have 16
// pre-defined personality routines at most.
AEABI_UNWIND_CPP_PR0 = 0,
AEABI_UNWIND_CPP_PR1 = 1,
AEABI_UNWIND_CPP_PR2 = 2,
NUM_PERSONALITY_INDEX
};
}
}
}
#endif // ARM_UNWIND_OP_H
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