ABISysV_arm.cpp | Explore in Territory

//===-- ABISysV_arm.cpp ---------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "ABISysV_arm.h"

#include <optional>
#include <vector>

#include "llvm/ADT/STLExtras.h"
#include "llvm/TargetParser/Triple.h"

#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/Value.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Symbol/UnwindPlan.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Utility/ConstString.h"
#include "lldb/Utility/RegisterValue.h"
#include "lldb/Utility/Scalar.h"
#include "lldb/Utility/Status.h"

#include "Plugins/Process/Utility/ARMDefines.h"
#include "Utility/ARM_DWARF_Registers.h"
#include "Utility/ARM_ehframe_Registers.h"

usingnamespacelldb;
usingnamespacelldb_private;

LLDB_PLUGIN_DEFINE(…)

static const RegisterInfo g_register_infos[] = …;

static const uint32_t k_num_register_infos = …;

const lldb_private::RegisterInfo *
ABISysV_arm::GetRegisterInfoArray(uint32_t &count) { … }

size_t ABISysV_arm::GetRedZoneSize() const { … }

// Static Functions

ABISP
ABISysV_arm::CreateInstance(lldb::ProcessSP process_sp, const ArchSpec &arch) { … }

bool ABISysV_arm::PrepareTrivialCall(Thread &thread, addr_t sp,
                                     addr_t function_addr, addr_t return_addr,
                                     llvm::ArrayRef<addr_t> args) const { … }

bool ABISysV_arm::GetArgumentValues(Thread &thread, ValueList &values) const { … }

static bool GetReturnValuePassedInMemory(Thread &thread,
                                         RegisterContext *reg_ctx,
                                         size_t byte_size, Value &value) { … }

bool ABISysV_arm::IsArmHardFloat(Thread &thread) const { … }

ValueObjectSP ABISysV_arm::GetReturnValueObjectImpl(
    Thread &thread, lldb_private::CompilerType &compiler_type) const { … }

Status ABISysV_arm::SetReturnValueObject(lldb::StackFrameSP &frame_sp,
                                         lldb::ValueObjectSP &new_value_sp) { … }

bool ABISysV_arm::CreateFunctionEntryUnwindPlan(UnwindPlan &unwind_plan) { … }

bool ABISysV_arm::CreateDefaultUnwindPlan(UnwindPlan &unwind_plan) { … }

// cf. "ARMv6 Function Calling Conventions"

// ARMv7 on GNU/Linux general purpose reg rules:
//    r0-r3 not preserved  (used for argument passing)
//    r4-r11 preserved (v1-v8)
//    r12   not presrved
//    r13   preserved (stack pointer)
//    r14   preserved (link register)
//    r15   preserved (pc)
//    cpsr  not preserved (different rules for different bits)

// ARMv7 VFP register rules:
//    d0-d7   not preserved   (aka s0-s15, q0-q3)
//    d8-d15  preserved       (aka s16-s31, q4-q7)
//    d16-d31 not preserved   (aka q8-q15)

bool ABISysV_arm::RegisterIsVolatile(const RegisterInfo *reg_info) { … }

void ABISysV_arm::Initialize() { … }

void ABISysV_arm::Terminate() { … }
llvm/lldb/source/Plugins/ABI/ARM/ABISysV_arm.cpp
