| //===-- PlatformFreeBSD.cpp -------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "PlatformFreeBSD.h" |
| #include "lldb/Host/Config.h" |
| |
| // C Includes |
| #include <stdio.h> |
| #ifndef LLDB_DISABLE_POSIX |
| #include <sys/utsname.h> |
| #endif |
| |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/Breakpoint/BreakpointLocation.h" |
| #include "lldb/Breakpoint/BreakpointSite.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/State.h" |
| #include "lldb/Host/HostInfo.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Utility/FileSpec.h" |
| #include "lldb/Utility/Log.h" |
| #include "lldb/Utility/Status.h" |
| #include "lldb/Utility/StreamString.h" |
| |
| // Define these constants from FreeBSD mman.h for use when targeting remote |
| // FreeBSD 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_freebsd; |
| |
| static uint32_t g_initialize_count = 0; |
| |
| //------------------------------------------------------------------ |
| |
| PlatformSP PlatformFreeBSD::CreateInstance(bool force, const ArchSpec *arch) { |
| Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM)); |
| LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force, |
| arch ? arch->GetArchitectureName() : "<null>", |
| arch ? arch->GetTriple().getTriple() : "<null>"); |
| |
| bool create = force; |
| if (create == false && arch && arch->IsValid()) { |
| const llvm::Triple &triple = arch->GetTriple(); |
| switch (triple.getOS()) { |
| case llvm::Triple::FreeBSD: |
| create = true; |
| break; |
| |
| #if defined(__FreeBSD__) |
| // 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 PlatformFreeBSD(false)); |
| } |
| return PlatformSP(); |
| } |
| |
| ConstString PlatformFreeBSD::GetPluginNameStatic(bool is_host) { |
| if (is_host) { |
| static ConstString g_host_name(Platform::GetHostPlatformName()); |
| return g_host_name; |
| } else { |
| static ConstString g_remote_name("remote-freebsd"); |
| return g_remote_name; |
| } |
| } |
| |
| const char *PlatformFreeBSD::GetPluginDescriptionStatic(bool is_host) { |
| if (is_host) |
| return "Local FreeBSD user platform plug-in."; |
| else |
| return "Remote FreeBSD user platform plug-in."; |
| } |
| |
| ConstString PlatformFreeBSD::GetPluginName() { |
| return GetPluginNameStatic(IsHost()); |
| } |
| |
| void PlatformFreeBSD::Initialize() { |
| Platform::Initialize(); |
| |
| if (g_initialize_count++ == 0) { |
| #if defined(__FreeBSD__) |
| PlatformSP default_platform_sp(new PlatformFreeBSD(true)); |
| default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture()); |
| Platform::SetHostPlatform(default_platform_sp); |
| #endif |
| PluginManager::RegisterPlugin( |
| PlatformFreeBSD::GetPluginNameStatic(false), |
| PlatformFreeBSD::GetPluginDescriptionStatic(false), |
| PlatformFreeBSD::CreateInstance, nullptr); |
| } |
| } |
| |
| void PlatformFreeBSD::Terminate() { |
| if (g_initialize_count > 0) { |
| if (--g_initialize_count == 0) { |
| PluginManager::UnregisterPlugin(PlatformFreeBSD::CreateInstance); |
| } |
| } |
| |
| PlatformPOSIX::Terminate(); |
| } |
| |
| //------------------------------------------------------------------ |
| /// Default Constructor |
| //------------------------------------------------------------------ |
| PlatformFreeBSD::PlatformFreeBSD(bool is_host) |
| : PlatformPOSIX(is_host) // This is the local host platform |
| {} |
| |
| PlatformFreeBSD::~PlatformFreeBSD() = default; |
| |
| bool PlatformFreeBSD::GetSupportedArchitectureAtIndex(uint32_t idx, |
| ArchSpec &arch) { |
| if (IsHost()) { |
| ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault); |
| if (hostArch.GetTriple().isOSFreeBSD()) { |
| if (idx == 0) { |
| arch = hostArch; |
| return arch.IsValid(); |
| } else if (idx == 1) { |
| // If the default host architecture is 64-bit, look for a 32-bit |
| // variant |
| if (hostArch.IsValid() && hostArch.GetTriple().isArch64Bit()) { |
| arch = HostInfo::GetArchitecture(HostInfo::eArchKind32); |
| return arch.IsValid(); |
| } |
| } |
| } |
| } else { |
| if (m_remote_platform_sp) |
| return m_remote_platform_sp->GetSupportedArchitectureAtIndex(idx, arch); |
| |
| llvm::Triple triple; |
| // Set the OS to FreeBSD |
| triple.setOS(llvm::Triple::FreeBSD); |
| // Set the architecture |
| switch (idx) { |
| case 0: |
| triple.setArchName("x86_64"); |
| break; |
| case 1: |
| triple.setArchName("i386"); |
| break; |
| case 2: |
| triple.setArchName("aarch64"); |
| break; |
| case 3: |
| triple.setArchName("arm"); |
| break; |
| case 4: |
| triple.setArchName("mips64"); |
| break; |
| case 5: |
| triple.setArchName("mips"); |
| break; |
| case 6: |
| triple.setArchName("ppc64"); |
| break; |
| case 7: |
| triple.setArchName("ppc"); |
| break; |
| default: |
| return false; |
| } |
| // Leave the vendor as "llvm::Triple:UnknownVendor" and don't specify the |
| // vendor by calling triple.SetVendorName("unknown") so that it is a |
| // "unspecified unknown". This means when someone calls |
| // triple.GetVendorName() it will return an empty string which indicates |
| // that the vendor can be set when two architectures are merged |
| |
| // Now set the triple into "arch" and return true |
| arch.SetTriple(triple); |
| return true; |
| } |
| return false; |
| } |
| |
| void PlatformFreeBSD::GetStatus(Stream &strm) { |
| Platform::GetStatus(strm); |
| |
| #ifndef LLDB_DISABLE_POSIX |
| // Display local kernel information only when we are running in host mode. |
| // Otherwise, we would end up printing non-FreeBSD 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 |
| } |
| |
| size_t |
| PlatformFreeBSD::GetSoftwareBreakpointTrapOpcode(Target &target, |
| BreakpointSite *bp_site) { |
| switch (target.GetArchitecture().GetMachine()) { |
| case llvm::Triple::arm: { |
| lldb::BreakpointLocationSP bp_loc_sp(bp_site->GetOwnerAtIndex(0)); |
| AddressClass addr_class = AddressClass::eUnknown; |
| |
| if (bp_loc_sp) { |
| addr_class = bp_loc_sp->GetAddress().GetAddressClass(); |
| if (addr_class == AddressClass::eUnknown && |
| (bp_loc_sp->GetAddress().GetFileAddress() & 1)) |
| addr_class = AddressClass::eCodeAlternateISA; |
| } |
| |
| if (addr_class == AddressClass::eCodeAlternateISA) { |
| // TODO: Enable when FreeBSD supports thumb breakpoints. |
| // FreeBSD kernel as of 10.x, does not support thumb breakpoints |
| return 0; |
| } |
| |
| static const uint8_t g_arm_breakpoint_opcode[] = {0xFE, 0xDE, 0xFF, 0xE7}; |
| size_t trap_opcode_size = sizeof(g_arm_breakpoint_opcode); |
| assert(bp_site); |
| if (bp_site->SetTrapOpcode(g_arm_breakpoint_opcode, trap_opcode_size)) |
| return trap_opcode_size; |
| } |
| LLVM_FALLTHROUGH; |
| default: |
| return Platform::GetSoftwareBreakpointTrapOpcode(target, bp_site); |
| } |
| } |
| |
| Status PlatformFreeBSD::LaunchProcess(ProcessLaunchInfo &launch_info) { |
| Status error; |
| if (IsHost()) { |
| error = Platform::LaunchProcess(launch_info); |
| } else { |
| if (m_remote_platform_sp) |
| error = m_remote_platform_sp->LaunchProcess(launch_info); |
| else |
| error.SetErrorString("the platform is not currently connected"); |
| } |
| return error; |
| } |
| |
| lldb::ProcessSP PlatformFreeBSD::Attach(ProcessAttachInfo &attach_info, |
| Debugger &debugger, Target *target, |
| Status &error) { |
| lldb::ProcessSP process_sp; |
| if (IsHost()) { |
| if (target == NULL) { |
| TargetSP new_target_sp; |
| ArchSpec emptyArchSpec; |
| |
| error = debugger.GetTargetList().CreateTarget(debugger, "", emptyArchSpec, |
| false, m_remote_platform_sp, |
| new_target_sp); |
| target = new_target_sp.get(); |
| } else |
| error.Clear(); |
| |
| if (target && error.Success()) { |
| debugger.GetTargetList().SetSelectedTarget(target); |
| // The freebsd always currently uses the GDB remote debugger plug-in so |
| // even when debugging locally we are debugging remotely! Just like the |
| // darwin plugin. |
| process_sp = target->CreateProcess( |
| attach_info.GetListenerForProcess(debugger), "gdb-remote", NULL); |
| |
| if (process_sp) |
| error = process_sp->Attach(attach_info); |
| } |
| } else { |
| if (m_remote_platform_sp) |
| process_sp = |
| m_remote_platform_sp->Attach(attach_info, debugger, target, error); |
| else |
| error.SetErrorString("the platform is not currently connected"); |
| } |
| return process_sp; |
| } |
| |
| // FreeBSD processes cannot yet be launched by spawning and attaching. |
| bool PlatformFreeBSD::CanDebugProcess() { |
| return false; |
| } |
| |
| void PlatformFreeBSD::CalculateTrapHandlerSymbolNames() { |
| m_trap_handlers.push_back(ConstString("_sigtramp")); |
| } |
| |
| MmapArgList PlatformFreeBSD::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}); |
| if (arch.GetTriple().getArch() == llvm::Triple::x86) |
| args.push_back(0); |
| return args; |
| } |
