forked from OSchip/llvm-project
107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
//===-- ABISysV_mips64.h ----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H
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#define LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H
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#include "lldb/Target/ABI.h"
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#include "lldb/lldb-private.h"
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class ABISysV_mips64 : public lldb_private::RegInfoBasedABI {
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public:
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~ABISysV_mips64() override = default;
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size_t GetRedZoneSize() const override;
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bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,
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lldb::addr_t functionAddress,
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lldb::addr_t returnAddress,
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llvm::ArrayRef<lldb::addr_t> args) const override;
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bool GetArgumentValues(lldb_private::Thread &thread,
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lldb_private::ValueList &values) const override;
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lldb_private::Status
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SetReturnValueObject(lldb::StackFrameSP &frame_sp,
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lldb::ValueObjectSP &new_value) override;
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lldb::ValueObjectSP
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GetReturnValueObjectImpl(lldb_private::Thread &thread,
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lldb_private::CompilerType &type) const override;
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bool
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CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
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bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
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bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;
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bool IsSoftFloat(uint32_t fp_flag) const;
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// The SysV mips ABI requires that stack frames be 16 byte aligned.
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// When there is a trap handler on the stack, e.g. _sigtramp in userland
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// code, we've seen that the stack pointer is often not aligned properly
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// before the handler is invoked. This means that lldb will stop the unwind
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// early -- before the function which caused the trap.
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//
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// To work around this, we relax that alignment to be just word-size
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// (8-bytes).
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// Allowing the trap handlers for user space would be easy (_sigtramp) but
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// in other environments there can be a large number of different functions
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// involved in async traps.
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bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
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// Make sure the stack call frame addresses are 8 byte aligned
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if (cfa & (8ull - 1ull))
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return false; // Not 8 byte aligned
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if (cfa == 0)
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return false; // Zero is not a valid stack address
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return true;
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}
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bool CodeAddressIsValid(lldb::addr_t pc) override {
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if (pc & (4ull - 1ull))
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return false; // Not 4 byte aligned
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// Anything else if fair game..
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return true;
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}
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const lldb_private::RegisterInfo *
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GetRegisterInfoArray(uint32_t &count) override;
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// Static Functions
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static void Initialize();
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static void Terminate();
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static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
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static lldb_private::ConstString GetPluginNameStatic();
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// PluginInterface protocol
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lldb_private::ConstString GetPluginName() override;
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uint32_t GetPluginVersion() override;
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protected:
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void CreateRegisterMapIfNeeded();
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lldb::ValueObjectSP
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GetReturnValueObjectSimple(lldb_private::Thread &thread,
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lldb_private::CompilerType &ast_type) const;
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bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
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private:
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using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
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};
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#endif // LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H
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