9c7fbc3f9b
Introduce a FreeBSDKernel plugin that provides the ability to read FreeBSD kernel core dumps. The plugin utilizes libfbsdvmcore to provide support for both "full memory dump" and minidump formats across variety of architectures supported by FreeBSD. It provides the ability to read kernel memory, as well as the crashed thread status with registers on arm64, i386 and x86_64. Differential Revision: https://reviews.llvm.org/D114911
84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
//===-- RegisterContextFreeBSDKernel_i386.cpp -----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "RegisterContextFreeBSDKernel_i386.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Utility/RegisterValue.h"
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#include "llvm/Support/Endian.h"
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using namespace lldb;
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using namespace lldb_private;
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RegisterContextFreeBSDKernel_i386::RegisterContextFreeBSDKernel_i386(
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Thread &thread, RegisterInfoInterface *register_info, lldb::addr_t pcb_addr)
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: RegisterContextPOSIX_x86(thread, 0, register_info), m_pcb_addr(pcb_addr) {
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}
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bool RegisterContextFreeBSDKernel_i386::ReadGPR() { return true; }
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bool RegisterContextFreeBSDKernel_i386::ReadFPR() { return true; }
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bool RegisterContextFreeBSDKernel_i386::WriteGPR() {
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assert(0);
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return false;
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}
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bool RegisterContextFreeBSDKernel_i386::WriteFPR() {
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assert(0);
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return false;
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}
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bool RegisterContextFreeBSDKernel_i386::ReadRegister(
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const RegisterInfo *reg_info, RegisterValue &value) {
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if (m_pcb_addr == LLDB_INVALID_ADDRESS)
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return false;
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struct {
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llvm::support::ulittle32_t edi;
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llvm::support::ulittle32_t esi;
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llvm::support::ulittle32_t ebp;
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llvm::support::ulittle32_t esp;
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llvm::support::ulittle32_t ebx;
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llvm::support::ulittle32_t eip;
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} pcb;
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Status error;
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size_t rd =
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m_thread.GetProcess()->ReadMemory(m_pcb_addr, &pcb, sizeof(pcb), error);
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if (rd != sizeof(pcb))
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return false;
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uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];
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switch (reg) {
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#define REG(x) \
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case lldb_##x##_i386: \
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value = pcb.x; \
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break;
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REG(edi);
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REG(esi);
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REG(ebp);
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REG(esp);
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REG(eip);
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#undef REG
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default:
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return false;
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}
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return true;
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}
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bool RegisterContextFreeBSDKernel_i386::WriteRegister(
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const RegisterInfo *reg_info, const RegisterValue &value) {
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return false;
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}
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