| //===-- RegisterContextFreeBSDKernel_arm64.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 "RegisterContextFreeBSDKernel_arm64.h" |
| #include "Plugins/Process/Utility/lldb-arm64-register-enums.h" |
| |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/Thread.h" |
| #include "lldb/Utility/RegisterValue.h" |
| #include "llvm/Support/Endian.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| RegisterContextFreeBSDKernel_arm64::RegisterContextFreeBSDKernel_arm64( |
| Thread &thread, std::unique_ptr<RegisterInfoPOSIX_arm64> register_info_up, |
| lldb::addr_t pcb_addr) |
| : RegisterContextPOSIX_arm64(thread, std::move(register_info_up)), |
| m_pcb_addr(pcb_addr) {} |
| |
| bool RegisterContextFreeBSDKernel_arm64::ReadGPR() { return true; } |
| |
| bool RegisterContextFreeBSDKernel_arm64::ReadFPR() { return true; } |
| |
| bool RegisterContextFreeBSDKernel_arm64::WriteGPR() { |
| assert(0); |
| return false; |
| } |
| |
| bool RegisterContextFreeBSDKernel_arm64::WriteFPR() { |
| assert(0); |
| return false; |
| } |
| |
| bool RegisterContextFreeBSDKernel_arm64::ReadRegister( |
| const RegisterInfo *reg_info, RegisterValue &value) { |
| if (m_pcb_addr == LLDB_INVALID_ADDRESS) |
| return false; |
| |
| struct { |
| llvm::support::ulittle64_t x[30]; |
| llvm::support::ulittle64_t lr; |
| llvm::support::ulittle64_t _reserved; |
| llvm::support::ulittle64_t sp; |
| } pcb; |
| |
| Status error; |
| size_t rd = |
| m_thread.GetProcess()->ReadMemory(m_pcb_addr, &pcb, sizeof(pcb), error); |
| if (rd != sizeof(pcb)) |
| return false; |
| |
| uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; |
| switch (reg) { |
| case gpr_x0_arm64: |
| case gpr_x1_arm64: |
| case gpr_x2_arm64: |
| case gpr_x3_arm64: |
| case gpr_x4_arm64: |
| case gpr_x5_arm64: |
| case gpr_x6_arm64: |
| case gpr_x7_arm64: |
| case gpr_x8_arm64: |
| case gpr_x9_arm64: |
| case gpr_x10_arm64: |
| case gpr_x11_arm64: |
| case gpr_x12_arm64: |
| case gpr_x13_arm64: |
| case gpr_x14_arm64: |
| case gpr_x15_arm64: |
| case gpr_x16_arm64: |
| case gpr_x17_arm64: |
| case gpr_x18_arm64: |
| case gpr_x19_arm64: |
| case gpr_x20_arm64: |
| case gpr_x21_arm64: |
| case gpr_x22_arm64: |
| case gpr_x23_arm64: |
| case gpr_x24_arm64: |
| case gpr_x25_arm64: |
| case gpr_x26_arm64: |
| case gpr_x27_arm64: |
| case gpr_x28_arm64: |
| case gpr_fp_arm64: |
| static_assert(gpr_fp_arm64 - gpr_x0_arm64 == 29, |
| "nonconsecutive arm64 register numbers"); |
| value = pcb.x[reg - gpr_x0_arm64]; |
| break; |
| case gpr_sp_arm64: |
| value = pcb.sp; |
| break; |
| case gpr_pc_arm64: |
| // The pc of crashing thread is stored in lr. |
| value = pcb.lr; |
| break; |
| default: |
| return false; |
| } |
| return true; |
| } |
| |
| bool RegisterContextFreeBSDKernel_arm64::WriteRegister( |
| const RegisterInfo *reg_info, const RegisterValue &value) { |
| return false; |
| } |