89 lines · cpp
1//===-- RegisterContextFreeBSDKernel_x86_64.cpp ---------------------------===//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#include "RegisterContextFreeBSDKernel_x86_64.h"10 11#include "lldb/Target/Process.h"12#include "lldb/Target/Thread.h"13#include "lldb/Utility/RegisterValue.h"14#include "llvm/Support/Endian.h"15 16using namespace lldb;17using namespace lldb_private;18 19RegisterContextFreeBSDKernel_x86_64::RegisterContextFreeBSDKernel_x86_64(20 Thread &thread, RegisterInfoInterface *register_info, lldb::addr_t pcb_addr)21 : RegisterContextPOSIX_x86(thread, 0, register_info), m_pcb_addr(pcb_addr) {22}23 24bool RegisterContextFreeBSDKernel_x86_64::ReadGPR() { return true; }25 26bool RegisterContextFreeBSDKernel_x86_64::ReadFPR() { return true; }27 28bool RegisterContextFreeBSDKernel_x86_64::WriteGPR() {29 assert(0);30 return false;31}32 33bool RegisterContextFreeBSDKernel_x86_64::WriteFPR() {34 assert(0);35 return false;36}37 38bool RegisterContextFreeBSDKernel_x86_64::ReadRegister(39 const RegisterInfo *reg_info, RegisterValue &value) {40 if (m_pcb_addr == LLDB_INVALID_ADDRESS)41 return false;42 43 struct {44 llvm::support::ulittle64_t r15;45 llvm::support::ulittle64_t r14;46 llvm::support::ulittle64_t r13;47 llvm::support::ulittle64_t r12;48 llvm::support::ulittle64_t rbp;49 llvm::support::ulittle64_t rsp;50 llvm::support::ulittle64_t rbx;51 llvm::support::ulittle64_t rip;52 } pcb;53 54 Status error;55 size_t rd =56 m_thread.GetProcess()->ReadMemory(m_pcb_addr, &pcb, sizeof(pcb), error);57 if (rd != sizeof(pcb))58 return false;59 60 uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];61 switch (reg) {62#define REG(x) \63 case lldb_##x##_x86_64: \64 value = pcb.x; \65 break;66 67 REG(r15);68 REG(r14);69 REG(r13);70 REG(r12);71 REG(rbp);72 REG(rsp);73 REG(rbx);74 REG(rip);75 76#undef REG77 78 default:79 return false;80 }81 82 return true;83}84 85bool RegisterContextFreeBSDKernel_x86_64::WriteRegister(86 const RegisterInfo *reg_info, const RegisterValue &value) {87 return false;88}89