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// Copyright 2019 Google
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <stdbool.h>
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#include <sys/ucontext.h>
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#if CLS_CPU_ARM
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#define FIRCLSThreadStateCount ARM_THREAD_STATE_COUNT
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#define FIRCLSThreadState ARM_THREAD_STATE
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#elif CLS_CPU_ARM64
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#define FIRCLSThreadStateCount ARM_THREAD_STATE64_COUNT
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#define FIRCLSThreadState ARM_THREAD_STATE64
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#elif CLS_CPU_I386
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#define FIRCLSThreadStateCount x86_THREAD_STATE32_COUNT
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#define FIRCLSThreadState x86_THREAD_STATE32
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#elif CLS_CPU_X86_64
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#define FIRCLSThreadStateCount x86_THREAD_STATE64_COUNT
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#define FIRCLSThreadState x86_THREAD_STATE64
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#endif
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// _STRUCT_MCONTEXT was fixed to point to the right thing on ARM in the iOS 7.1 SDK
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typedef _STRUCT_MCONTEXT FIRCLSThreadContext;
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// I'm not entirely sure what happened when, but this appears to have disappeared from
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// the SDKs...
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#if !defined(_STRUCT_UCONTEXT64)
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typedef _STRUCT_UCONTEXT _STRUCT_UCONTEXT64;
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#endif
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#pragma mark Register Access
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uintptr_t FIRCLSThreadContextGetPC(FIRCLSThreadContext* registers);
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uintptr_t FIRCLSThreadContextGetStackPointer(const FIRCLSThreadContext* registers);
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uintptr_t FIRCLSThreadContextGetFramePointer(const FIRCLSThreadContext* registers);
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bool FIRCLSThreadContextSetPC(FIRCLSThreadContext* registers, uintptr_t value);
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bool FIRCLSThreadContextSetStackPointer(FIRCLSThreadContext* registers, uintptr_t value);
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bool FIRCLSThreadContextSetFramePointer(FIRCLSThreadContext* registers, uintptr_t value);
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// The link register only exists on ARM platforms.
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#if CLS_CPU_ARM || CLS_CPU_ARM64
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uintptr_t FIRCLSThreadContextGetLinkRegister(const FIRCLSThreadContext* registers);
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bool FIRCLSThreadContextSetLinkRegister(FIRCLSThreadContext* registers, uintptr_t value);
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#endif
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