| //===-- RegisterContextFreeBSDKernel_i386.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_i386.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_i386::RegisterContextFreeBSDKernel_i386( |
| Thread &thread, RegisterInfoInterface *register_info, lldb::addr_t pcb_addr) |
| : RegisterContextPOSIX_x86(thread, 0, register_info), m_pcb_addr(pcb_addr) { |
| } |
| |
| bool RegisterContextFreeBSDKernel_i386::ReadGPR() { return true; } |
| |
| bool RegisterContextFreeBSDKernel_i386::ReadFPR() { return true; } |
| |
| bool RegisterContextFreeBSDKernel_i386::WriteGPR() { |
| assert(0); |
| return false; |
| } |
| |
| bool RegisterContextFreeBSDKernel_i386::WriteFPR() { |
| assert(0); |
| return false; |
| } |
| |
| bool RegisterContextFreeBSDKernel_i386::ReadRegister( |
| const RegisterInfo *reg_info, RegisterValue &value) { |
| if (m_pcb_addr == LLDB_INVALID_ADDRESS) |
| return false; |
| |
| struct { |
| llvm::support::ulittle32_t edi; |
| llvm::support::ulittle32_t esi; |
| llvm::support::ulittle32_t ebp; |
| llvm::support::ulittle32_t esp; |
| llvm::support::ulittle32_t ebx; |
| llvm::support::ulittle32_t eip; |
| } 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) { |
| #define REG(x) \ |
| case lldb_##x##_i386: \ |
| value = pcb.x; \ |
| break; |
| |
| REG(edi); |
| REG(esi); |
| REG(ebp); |
| REG(esp); |
| REG(eip); |
| |
| #undef REG |
| |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool RegisterContextFreeBSDKernel_i386::WriteRegister( |
| const RegisterInfo *reg_info, const RegisterValue &value) { |
| return false; |
| } |