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1//===-- ABISysV_ppc64.h ----------------------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC64_H10#define LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC64_H11 12#include "lldb/Target/ABI.h"13#include "lldb/lldb-forward.h"14#include "lldb/lldb-private.h"15 16class ABISysV_ppc64 : public lldb_private::RegInfoBasedABI {17public:18 ~ABISysV_ppc64() override = default;19 20 size_t GetRedZoneSize() const override;21 22 bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,23 lldb::addr_t functionAddress,24 lldb::addr_t returnAddress,25 llvm::ArrayRef<lldb::addr_t> args) const override;26 27 bool GetArgumentValues(lldb_private::Thread &thread,28 lldb_private::ValueList &values) const override;29 30 lldb_private::Status31 SetReturnValueObject(lldb::StackFrameSP &frame_sp,32 lldb::ValueObjectSP &new_value) override;33 34 lldb::ValueObjectSP35 GetReturnValueObjectImpl(lldb_private::Thread &thread,36 lldb_private::CompilerType &type) const override;37 38 lldb::UnwindPlanSP CreateFunctionEntryUnwindPlan() override;39 40 lldb::UnwindPlanSP CreateDefaultUnwindPlan() override;41 42 bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;43 44 // The SysV ppc64 ABI requires that stack frames be 16 byte aligned.45 // When there is a trap handler on the stack, e.g. _sigtramp in userland46 // code, we've seen that the stack pointer is often not aligned properly47 // before the handler is invoked. This means that lldb will stop the unwind48 // early -- before the function which caused the trap.49 //50 // To work around this, we relax that alignment to be just word-size51 // (8-bytes).52 // Allowing the trap handlers for user space would be easy (_sigtramp) but53 // in other environments there can be a large number of different functions54 // involved in async traps.55 bool CallFrameAddressIsValid(lldb::addr_t cfa) override {56 // Make sure the stack call frame addresses are 8 byte aligned57 if (cfa & (8ull - 1ull))58 return false; // Not 8 byte aligned59 if (cfa == 0)60 return false; // Zero is not a valid stack address61 return true;62 }63 64 bool CodeAddressIsValid(lldb::addr_t pc) override {65 // We have a 64 bit address space, so anything is valid as opcodes66 // aren't fixed width...67 return true;68 }69 70 const lldb_private::RegisterInfo *71 GetRegisterInfoArray(uint32_t &count) override;72 73 // Static Functions74 75 static void Initialize();76 77 static void Terminate();78 79 static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);80 81 static llvm::StringRef GetPluginNameStatic() { return "sysv-ppc64"; }82 83 // PluginInterface protocol84 85 llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }86 87protected:88 void CreateRegisterMapIfNeeded();89 90 lldb::ValueObjectSP91 GetReturnValueObjectSimple(lldb_private::Thread &thread,92 lldb_private::CompilerType &ast_type) const;93 94 bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);95 96private:97 using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.98 99 lldb::ByteOrder GetByteOrder() const;100};101 102#endif // LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC64_H103