171 lines · cpp
1//===-- PlatformOpenBSD.cpp -----------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "PlatformOpenBSD.h"10#include "lldb/Host/Config.h"11 12#include <cstdio>13#if LLDB_ENABLE_POSIX14#include <sys/utsname.h>15#endif16 17#include "lldb/Core/Debugger.h"18#include "lldb/Core/PluginManager.h"19#include "lldb/Host/HostInfo.h"20#include "lldb/Target/Process.h"21#include "lldb/Target/Target.h"22#include "lldb/Utility/FileSpec.h"23#include "lldb/Utility/LLDBLog.h"24#include "lldb/Utility/Log.h"25#include "lldb/Utility/State.h"26#include "lldb/Utility/Status.h"27#include "lldb/Utility/StreamString.h"28 29// Define these constants from OpenBSD mman.h for use when targeting remote30// openbsd systems even when host has different values.31#define MAP_PRIVATE 0x000232#define MAP_ANON 0x100033 34using namespace lldb;35using namespace lldb_private;36using namespace lldb_private::platform_openbsd;37 38LLDB_PLUGIN_DEFINE(PlatformOpenBSD)39 40static uint32_t g_initialize_count = 0;41 42 43PlatformSP PlatformOpenBSD::CreateInstance(bool force, const ArchSpec *arch) {44 Log *log = GetLog(LLDBLog::Platform);45 LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force,46 arch ? arch->GetArchitectureName() : "<null>",47 arch ? arch->GetTriple().getTriple() : "<null>");48 49 bool create = force;50 if (!create && arch && arch->IsValid()) {51 const llvm::Triple &triple = arch->GetTriple();52 switch (triple.getOS()) {53 case llvm::Triple::OpenBSD:54 create = true;55 break;56 57#if defined(__OpenBSD__)58 // Only accept "unknown" for the OS if the host is BSD and it "unknown"59 // wasn't specified (it was just returned because it was NOT specified)60 case llvm::Triple::OSType::UnknownOS:61 create = !arch->TripleOSWasSpecified();62 break;63#endif64 default:65 break;66 }67 }68 LLDB_LOG(log, "create = {0}", create);69 if (create) {70 return PlatformSP(new PlatformOpenBSD(false));71 }72 return PlatformSP();73}74 75llvm::StringRef PlatformOpenBSD::GetPluginDescriptionStatic(bool is_host) {76 if (is_host)77 return "Local OpenBSD user platform plug-in.";78 return "Remote OpenBSD user platform plug-in.";79}80 81void PlatformOpenBSD::Initialize() {82 Platform::Initialize();83 84 if (g_initialize_count++ == 0) {85#if defined(__OpenBSD__)86 PlatformSP default_platform_sp(new PlatformOpenBSD(true));87 default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());88 Platform::SetHostPlatform(default_platform_sp);89#endif90 PluginManager::RegisterPlugin(91 PlatformOpenBSD::GetPluginNameStatic(false),92 PlatformOpenBSD::GetPluginDescriptionStatic(false),93 PlatformOpenBSD::CreateInstance, nullptr);94 }95}96 97void PlatformOpenBSD::Terminate() {98 if (g_initialize_count > 0) {99 if (--g_initialize_count == 0) {100 PluginManager::UnregisterPlugin(PlatformOpenBSD::CreateInstance);101 }102 }103 104 PlatformPOSIX::Terminate();105}106 107/// Default Constructor108PlatformOpenBSD::PlatformOpenBSD(bool is_host)109 : PlatformPOSIX(is_host) // This is the local host platform110{111 if (is_host) {112 m_supported_architectures.push_back(HostInfo::GetArchitecture());113 } else {114 m_supported_architectures =115 CreateArchList({llvm::Triple::x86_64, llvm::Triple::x86,116 llvm::Triple::aarch64, llvm::Triple::arm},117 llvm::Triple::OpenBSD);118 }119}120 121std::vector<ArchSpec>122PlatformOpenBSD::GetSupportedArchitectures(const ArchSpec &process_host_arch) {123 if (m_remote_platform_sp)124 return m_remote_platform_sp->GetSupportedArchitectures(process_host_arch);125 return m_supported_architectures;126}127 128void PlatformOpenBSD::GetStatus(Stream &strm) {129 Platform::GetStatus(strm);130 131#if LLDB_ENABLE_POSIX132 // Display local kernel information only when we are running in host mode.133 // Otherwise, we would end up printing non-OpenBSD information (when running134 // on Mac OS for example).135 if (IsHost()) {136 struct utsname un;137 138 if (uname(&un))139 return;140 141 strm.Printf(" Kernel: %s\n", un.sysname);142 strm.Printf(" Release: %s\n", un.release);143 strm.Printf(" Version: %s\n", un.version);144 }145#endif146}147 148// OpenBSD processes cannot yet be launched by spawning and attaching.149bool PlatformOpenBSD::CanDebugProcess() {150 return false;151}152 153void PlatformOpenBSD::CalculateTrapHandlerSymbolNames() {154 m_trap_handlers.push_back(ConstString("_sigtramp"));155}156 157MmapArgList PlatformOpenBSD::GetMmapArgumentList(const ArchSpec &arch,158 addr_t addr, addr_t length,159 unsigned prot, unsigned flags,160 addr_t fd, addr_t offset) {161 uint64_t flags_platform = 0;162 163 if (flags & eMmapFlagsPrivate)164 flags_platform |= MAP_PRIVATE;165 if (flags & eMmapFlagsAnon)166 flags_platform |= MAP_ANON;167 168 MmapArgList args({addr, length, prot, flags_platform, fd, offset});169 return args;170}171