Index: lldb/source/Plugins/Process/CMakeLists.txt
===================================================================
--- lldb/source/Plugins/Process/CMakeLists.txt
+++ lldb/source/Plugins/Process/CMakeLists.txt
@@ -18,3 +18,4 @@
 add_subdirectory(elf-core)
 add_subdirectory(mach-core)
 add_subdirectory(minidump)
+add_subdirectory(FreeBSDKernel)
Index: lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt
===================================================================
--- /dev/null
+++ lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt
@@ -0,0 +1,17 @@
+find_library(FBSDVMCORE fbsdvmcore)
+
+if (NOT FBSDVMCORE)
+  message(STATUS "Skipping FreeBSDKernel plugin due to missing libfbsdvmcore")
+  return()
+endif()
+
+add_lldb_library(lldbPluginProcessFreeBSDKernel PLUGIN
+  ProcessFreeBSDKernel.cpp
+
+  LINK_LIBS
+    lldbCore
+    lldbTarget
+    ${FBSDVMCORE}
+  LINK_COMPONENTS
+    Support
+  )
Index: lldb/source/Plugins/Process/FreeBSDKernel/ProcessFreeBSDKernel.h
===================================================================
--- /dev/null
+++ lldb/source/Plugins/Process/FreeBSDKernel/ProcessFreeBSDKernel.h
@@ -0,0 +1,58 @@
+//===-- ProcessFreeBSDKernel.h ----------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_PROCESS_FREEBSDKERNEL_PROCESSFREEBSDKERNEL_H
+#define LLDB_SOURCE_PLUGINS_PROCESS_FREEBSDKERNEL_PROCESSFREEBSDKERNEL_H
+
+#include "lldb/Target/PostMortemProcess.h"
+
+class ProcessFreeBSDKernel : public lldb_private::PostMortemProcess {
+public:
+  ProcessFreeBSDKernel(lldb::TargetSP target_sp, lldb::ListenerSP listener,
+                       const lldb_private::FileSpec &core_file, void *fvc);
+
+  ~ProcessFreeBSDKernel() override;
+
+  static lldb::ProcessSP
+  CreateInstance(lldb::TargetSP target_sp, lldb::ListenerSP listener,
+                 const lldb_private::FileSpec *crash_file_path,
+                 bool can_connect);
+
+  static void Initialize();
+
+  static void Terminate();
+
+  static llvm::StringRef GetPluginNameStatic() { return "freebsd-kernel"; }
+
+  static llvm::StringRef GetPluginDescriptionStatic() {
+    return "FreeBSD kernel vmcore debugging plug-in.";
+  }
+
+  llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
+
+  lldb_private::Status DoDestroy() override;
+
+  bool CanDebug(lldb::TargetSP target_sp,
+                bool plugin_specified_by_name) override;
+
+  void RefreshStateAfterStop() override;
+
+  lldb_private::Status DoLoadCore() override;
+
+  size_t DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
+                      lldb_private::Status &error) override;
+
+protected:
+  bool DoUpdateThreadList(lldb_private::ThreadList &old_thread_list,
+                          lldb_private::ThreadList &new_thread_list) override;
+
+private:
+  void *m_fvc;
+};
+
+#endif // LLDB_SOURCE_PLUGINS_PROCESS_FREEBSDKERNEL_PROCESSFREEBSDKERNEL_H
Index: lldb/source/Plugins/Process/FreeBSDKernel/ProcessFreeBSDKernel.cpp
===================================================================
--- /dev/null
+++ lldb/source/Plugins/Process/FreeBSDKernel/ProcessFreeBSDKernel.cpp
@@ -0,0 +1,86 @@
+//===-- ProcessFreeBSDKernel.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 "ProcessFreeBSDKernel.h"
+
+#include "lldb/Core/Module.h"
+#include "lldb/Core/PluginManager.h"
+
+#include <fvc.h>
+
+using namespace lldb;
+using namespace lldb_private;
+
+LLDB_PLUGIN_DEFINE(ProcessFreeBSDKernel)
+
+ProcessFreeBSDKernel::ProcessFreeBSDKernel(lldb::TargetSP target_sp,
+                                           ListenerSP listener_sp,
+                                           const FileSpec &core_file, void *fvc)
+    : PostMortemProcess(target_sp, listener_sp), m_fvc(fvc) {}
+
+ProcessFreeBSDKernel::~ProcessFreeBSDKernel() {
+  if (m_fvc)
+    fvc_close(static_cast<fvc_t *>(m_fvc));
+}
+
+lldb::ProcessSP ProcessFreeBSDKernel::CreateInstance(lldb::TargetSP target_sp,
+                                                     ListenerSP listener_sp,
+                                                     const FileSpec *crash_file,
+                                                     bool can_connect) {
+  lldb::ProcessSP process_sp;
+  if (crash_file && !can_connect) {
+    fvc_t *fvc = fvc_open(
+        target_sp->GetExecutableModule()->GetFileSpec().GetPath().c_str(),
+        crash_file->GetPath().c_str(), nullptr, nullptr, nullptr);
+    if (fvc)
+      process_sp = std::make_shared<ProcessFreeBSDKernel>(
+          target_sp, listener_sp, *crash_file, fvc);
+  }
+  return process_sp;
+}
+
+void ProcessFreeBSDKernel::Initialize() {
+  static llvm::once_flag g_once_flag;
+
+  llvm::call_once(g_once_flag, []() {
+    PluginManager::RegisterPlugin(GetPluginNameStatic(),
+                                  GetPluginDescriptionStatic(), CreateInstance);
+  });
+}
+
+void ProcessFreeBSDKernel::Terminate() {
+  PluginManager::UnregisterPlugin(ProcessFreeBSDKernel::CreateInstance);
+}
+
+Status ProcessFreeBSDKernel::DoDestroy() { return Status(); }
+
+bool ProcessFreeBSDKernel::CanDebug(lldb::TargetSP target_sp,
+                                    bool plugin_specified_by_name) {
+  return true;
+}
+
+void ProcessFreeBSDKernel::RefreshStateAfterStop() {}
+
+bool ProcessFreeBSDKernel::DoUpdateThreadList(ThreadList &old_thread_list,
+                                              ThreadList &new_thread_list) {
+  return false;
+}
+
+Status ProcessFreeBSDKernel::DoLoadCore() {
+  // The core is already loaded by CreateInstance().
+  return Status();
+}
+
+size_t ProcessFreeBSDKernel::DoReadMemory(lldb::addr_t addr, void *buf,
+                                          size_t size, Status &error) {
+  ssize_t rd = fvc_read(static_cast<fvc_t *>(m_fvc), addr, buf, size);
+  if (rd < 0 || static_cast<size_t>(rd) != size)
+    error.SetErrorStringWithFormat("Reading memory failed: %s",
+                                   fvc_geterr(static_cast<fvc_t *>(m_fvc)));
+  return rd;
+}