1 files changed, 170 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/Platform/OpenBSD/PlatformOpenBSD.cpp b/contrib/llvm-project/lldb/source/Plugins/Platform/OpenBSD/PlatformOpenBSD.cpp
new file mode 100644
index 000000000000..3946092276fd
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/Platform/OpenBSD/PlatformOpenBSD.cpp
@@ -0,0 +1,170 @@
+//===-- PlatformOpenBSD.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 "PlatformOpenBSD.h"
+#include "lldb/Host/Config.h"
+
+#include <cstdio>
+#if LLDB_ENABLE_POSIX
+#include <sys/utsname.h>
+#endif
+
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Host/HostInfo.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Utility/FileSpec.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/State.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/Utility/StreamString.h"
+
+// Define these constants from OpenBSD mman.h for use when targeting remote
+// openbsd systems even when host has different values.
+#define MAP_PRIVATE 0x0002
+#define MAP_ANON 0x1000
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace lldb_private::platform_openbsd;
+
+LLDB_PLUGIN_DEFINE(PlatformOpenBSD)
+
+static uint32_t g_initialize_count = 0;
+
+
+PlatformSP PlatformOpenBSD::CreateInstance(bool force, const ArchSpec *arch) {
+  Log *log = GetLog(LLDBLog::Platform);
+  LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force,
+           arch ? arch->GetArchitectureName() : "<null>",
+           arch ? arch->GetTriple().getTriple() : "<null>");
+
+  bool create = force;
+  if (!create && arch && arch->IsValid()) {
+    const llvm::Triple &triple = arch->GetTriple();
+    switch (triple.getOS()) {
+    case llvm::Triple::OpenBSD:
+      create = true;
+      break;
+
+#if defined(__OpenBSD__)
+    // Only accept "unknown" for the OS if the host is BSD and it "unknown"
+    // wasn't specified (it was just returned because it was NOT specified)
+    case llvm::Triple::OSType::UnknownOS:
+      create = !arch->TripleOSWasSpecified();
+      break;
+#endif
+    default:
+      break;
+    }
+  }
+  LLDB_LOG(log, "create = {0}", create);
+  if (create) {
+    return PlatformSP(new PlatformOpenBSD(false));
+  }
+  return PlatformSP();
+}
+
+llvm::StringRef PlatformOpenBSD::GetPluginDescriptionStatic(bool is_host) {
+  if (is_host)
+    return "Local OpenBSD user platform plug-in.";
+  return "Remote OpenBSD user platform plug-in.";
+}
+
+void PlatformOpenBSD::Initialize() {
+  Platform::Initialize();
+
+  if (g_initialize_count++ == 0) {
+#if defined(__OpenBSD__)
+    PlatformSP default_platform_sp(new PlatformOpenBSD(true));
+    default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());
+    Platform::SetHostPlatform(default_platform_sp);
+#endif
+    PluginManager::RegisterPlugin(
+        PlatformOpenBSD::GetPluginNameStatic(false),
+        PlatformOpenBSD::GetPluginDescriptionStatic(false),
+        PlatformOpenBSD::CreateInstance, nullptr);
+  }
+}
+
+void PlatformOpenBSD::Terminate() {
+  if (g_initialize_count > 0) {
+    if (--g_initialize_count == 0) {
+      PluginManager::UnregisterPlugin(PlatformOpenBSD::CreateInstance);
+    }
+  }
+
+  PlatformPOSIX::Terminate();
+}
+
+/// Default Constructor
+PlatformOpenBSD::PlatformOpenBSD(bool is_host)
+    : PlatformPOSIX(is_host) // This is the local host platform
+{
+  if (is_host) {
+    m_supported_architectures.push_back(HostInfo::GetArchitecture());
+  } else {
+    m_supported_architectures =
+        CreateArchList({llvm::Triple::x86_64, llvm::Triple::x86,
+                        llvm::Triple::aarch64, llvm::Triple::arm},
+                       llvm::Triple::OpenBSD);
+  }
+}
+
+std::vector<ArchSpec>
+PlatformOpenBSD::GetSupportedArchitectures(const ArchSpec &process_host_arch) {
+  if (m_remote_platform_sp)
+    return m_remote_platform_sp->GetSupportedArchitectures(process_host_arch);
+  return m_supported_architectures;
+}
+
+void PlatformOpenBSD::GetStatus(Stream &strm) {
+  Platform::GetStatus(strm);
+
+#if LLDB_ENABLE_POSIX
+  // Display local kernel information only when we are running in host mode.
+  // Otherwise, we would end up printing non-OpenBSD information (when running
+  // on Mac OS for example).
+  if (IsHost()) {
+    struct utsname un;
+
+    if (uname(&un))
+      return;
+
+    strm.Printf("    Kernel: %s\n", un.sysname);
+    strm.Printf("   Release: %s\n", un.release);
+    strm.Printf("   Version: %s\n", un.version);
+  }
+#endif
+}
+
+// OpenBSD processes cannot yet be launched by spawning and attaching.
+bool PlatformOpenBSD::CanDebugProcess() {
+  return false;
+}
+
+void PlatformOpenBSD::CalculateTrapHandlerSymbolNames() {
+  m_trap_handlers.push_back(ConstString("_sigtramp"));
+}
+
+MmapArgList PlatformOpenBSD::GetMmapArgumentList(const ArchSpec &arch,
+                                                 addr_t addr, addr_t length,
+                                                 unsigned prot, unsigned flags,
+                                                 addr_t fd, addr_t offset) {
+  uint64_t flags_platform = 0;
+
+  if (flags & eMmapFlagsPrivate)
+    flags_platform |= MAP_PRIVATE;
+  if (flags & eMmapFlagsAnon)
+    flags_platform |= MAP_ANON;
+
+  MmapArgList args({addr, length, prot, flags_platform, fd, offset});
+  return args;
+}