111 lines · cpp
1//===-- RegisterContextFreeBSDKernel_arm64.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_arm64.h"10#include "Plugins/Process/Utility/lldb-arm64-register-enums.h"11 12#include "lldb/Target/Process.h"13#include "lldb/Target/Thread.h"14#include "lldb/Utility/RegisterValue.h"15#include "llvm/Support/Endian.h"16 17using namespace lldb;18using namespace lldb_private;19 20RegisterContextFreeBSDKernel_arm64::RegisterContextFreeBSDKernel_arm64(21 Thread &thread, std::unique_ptr<RegisterInfoPOSIX_arm64> register_info_up,22 lldb::addr_t pcb_addr)23 : RegisterContextPOSIX_arm64(thread, std::move(register_info_up)),24 m_pcb_addr(pcb_addr) {}25 26bool RegisterContextFreeBSDKernel_arm64::ReadGPR() { return true; }27 28bool RegisterContextFreeBSDKernel_arm64::ReadFPR() { return true; }29 30bool RegisterContextFreeBSDKernel_arm64::WriteGPR() {31 assert(0);32 return false;33}34 35bool RegisterContextFreeBSDKernel_arm64::WriteFPR() {36 assert(0);37 return false;38}39 40bool RegisterContextFreeBSDKernel_arm64::ReadRegister(41 const RegisterInfo *reg_info, RegisterValue &value) {42 if (m_pcb_addr == LLDB_INVALID_ADDRESS)43 return false;44 45 struct {46 llvm::support::ulittle64_t x[30];47 llvm::support::ulittle64_t lr;48 llvm::support::ulittle64_t _reserved;49 llvm::support::ulittle64_t sp;50 } pcb;51 52 Status error;53 size_t rd =54 m_thread.GetProcess()->ReadMemory(m_pcb_addr, &pcb, sizeof(pcb), error);55 if (rd != sizeof(pcb))56 return false;57 58 uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];59 switch (reg) {60 case gpr_x0_arm64:61 case gpr_x1_arm64:62 case gpr_x2_arm64:63 case gpr_x3_arm64:64 case gpr_x4_arm64:65 case gpr_x5_arm64:66 case gpr_x6_arm64:67 case gpr_x7_arm64:68 case gpr_x8_arm64:69 case gpr_x9_arm64:70 case gpr_x10_arm64:71 case gpr_x11_arm64:72 case gpr_x12_arm64:73 case gpr_x13_arm64:74 case gpr_x14_arm64:75 case gpr_x15_arm64:76 case gpr_x16_arm64:77 case gpr_x17_arm64:78 case gpr_x18_arm64:79 case gpr_x19_arm64:80 case gpr_x20_arm64:81 case gpr_x21_arm64:82 case gpr_x22_arm64:83 case gpr_x23_arm64:84 case gpr_x24_arm64:85 case gpr_x25_arm64:86 case gpr_x26_arm64:87 case gpr_x27_arm64:88 case gpr_x28_arm64:89 case gpr_fp_arm64:90 static_assert(gpr_fp_arm64 - gpr_x0_arm64 == 29,91 "nonconsecutive arm64 register numbers");92 value = pcb.x[reg - gpr_x0_arm64];93 break;94 case gpr_sp_arm64:95 value = pcb.sp;96 break;97 case gpr_pc_arm64:98 // The pc of crashing thread is stored in lr.99 value = pcb.lr;100 break;101 default:102 return false;103 }104 return true;105}106 107bool RegisterContextFreeBSDKernel_arm64::WriteRegister(108 const RegisterInfo *reg_info, const RegisterValue &value) {109 return false;110}111