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// Copyright 2019 Google

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#pragma once

#include "Crashlytics/Crashlytics/Helpers/FIRCLSFeatures.h"

#include "Crashlytics/Crashlytics/Unwind/Compact/FIRCLSCompactUnwind.h"

// Add some abstraction to compact unwinding, because compact

// unwinding is nearly identical between 32 and 64 bit

#if CLS_CPU_X86_64

#define CLS_X86_MODE_MASK UNWIND_X86_64_MODE_MASK

#define CLS_X86_MODE_BP_FRAME UNWIND_X86_64_MODE_RBP_FRAME

#define CLS_X86_MODE_STACK_IMMD UNWIND_X86_64_MODE_STACK_IMMD

#define CLS_X86_MODE_STACK_IND UNWIND_X86_64_MODE_STACK_IND

#define CLS_X86_MODE_DWARF UNWIND_X86_64_MODE_DWARF

#define CLS_X86_BP_FRAME_REGISTERS UNWIND_X86_64_RBP_FRAME_REGISTERS

#define CLS_X86_BP_FRAME_OFFSET UNWIND_X86_64_RBP_FRAME_OFFSET

#define CLS_X86_FRAMELESS_STACK_SIZE UNWIND_X86_64_FRAMELESS_STACK_SIZE

#define CLS_X86_FRAMELESS_STACK_ADJUST UNWIND_X86_64_FRAMELESS_STACK_ADJUST

#define CLS_X86_FRAMELESS_STACK_REG_COUNT UNWIND_X86_64_FRAMELESS_STACK_REG_COUNT

#define CLS_X86_FRAMELESS_STACK_REG_PERMUTATION UNWIND_X86_64_FRAMELESS_STACK_REG_PERMUTATION

#define CLS_X86_DWARF_SECTION_OFFSET UNWIND_X86_64_DWARF_SECTION_OFFSET

#define CLS_X86_REG_RBP UNWIND_X86_64_REG_RBP

#else

#define CLS_X86_MODE_MASK UNWIND_X86_MODE_MASK

#define CLS_X86_MODE_BP_FRAME UNWIND_X86_MODE_EBP_FRAME

#define CLS_X86_MODE_STACK_IMMD UNWIND_X86_MODE_STACK_IMMD

#define CLS_X86_MODE_STACK_IND UNWIND_X86_MODE_STACK_IND

#define CLS_X86_MODE_DWARF UNWIND_X86_MODE_DWARF

#define CLS_X86_BP_FRAME_REGISTERS UNWIND_X86_RBP_FRAME_REGISTERS

#define CLS_X86_BP_FRAME_OFFSET UNWIND_X86_RBP_FRAME_OFFSET

#define CLS_X86_FRAMELESS_STACK_SIZE UNWIND_X86_FRAMELESS_STACK_SIZE

#define CLS_X86_FRAMELESS_STACK_ADJUST UNWIND_X86_FRAMELESS_STACK_ADJUST

#define CLS_X86_FRAMELESS_STACK_REG_COUNT UNWIND_X86_FRAMELESS_STACK_REG_COUNT

#define CLS_X86_FRAMELESS_STACK_REG_PERMUTATION UNWIND_X86_FRAMELESS_STACK_REG_PERMUTATION

#define CLS_X86_DWARF_SECTION_OFFSET UNWIND_X86_DWARF_SECTION_OFFSET

#define CLS_X86_REG_RBP UNWIND_X86_REG_EBP

#endif

#if CLS_COMPACT_UNWINDING_SUPPORTED

bool FIRCLSCompactUnwindComputeStackSize(const compact_unwind_encoding_t encoding,

                                         const uintptr_t functionStart,

                                         const bool indirect,

                                         uint32_t* const stackSize);

bool FIRCLSCompactUnwindDecompressPermutation(const compact_unwind_encoding_t encoding,

                                              uintptr_t permutatedRegisters[const static 6]);

bool FIRCLSCompactUnwindRestoreRegisters(compact_unwind_encoding_t encoding,

                                         FIRCLSThreadContext* registers,

                                         uint32_t stackSize,

                                         const uintptr_t savedRegisters[const static 6],

                                         uintptr_t* address);

#endif