forked from OSchip/llvm-project
327 lines
9.8 KiB
C++
327 lines
9.8 KiB
C++
//===-- PlatformFreeBSD.cpp -------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "PlatformFreeBSD.h"
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#include "lldb/Host/Config.h"
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// C Includes
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#include <stdio.h>
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#ifndef LLDB_DISABLE_POSIX
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#include <sys/utsname.h>
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#endif
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Breakpoint/BreakpointLocation.h"
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#include "lldb/Breakpoint/BreakpointSite.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/State.h"
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#include "lldb/Host/HostInfo.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/FileSpec.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/Utility/StreamString.h"
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// Define these constants from FreeBSD mman.h for use when targeting
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// remote FreeBSD systems even when host has different values.
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#define MAP_PRIVATE 0x0002
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#define MAP_ANON 0x1000
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::platform_freebsd;
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static uint32_t g_initialize_count = 0;
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//------------------------------------------------------------------
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PlatformSP PlatformFreeBSD::CreateInstance(bool force, const ArchSpec *arch) {
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Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
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LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force,
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arch ? arch->GetArchitectureName() : "<null>",
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arch ? arch->GetTriple().getTriple() : "<null>");
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bool create = force;
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if (create == false && arch && arch->IsValid()) {
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const llvm::Triple &triple = arch->GetTriple();
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switch (triple.getOS()) {
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case llvm::Triple::FreeBSD:
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create = true;
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break;
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#if defined(__FreeBSD__)
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// Only accept "unknown" for the OS if the host is BSD and
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// it "unknown" wasn't specified (it was just returned because it
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// was NOT specified)
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case llvm::Triple::OSType::UnknownOS:
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create = !arch->TripleOSWasSpecified();
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break;
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#endif
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default:
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break;
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}
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}
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LLDB_LOG(log, "create = {0}", create);
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if (create) {
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return PlatformSP(new PlatformFreeBSD(false));
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}
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return PlatformSP();
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}
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ConstString PlatformFreeBSD::GetPluginNameStatic(bool is_host) {
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if (is_host) {
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static ConstString g_host_name(Platform::GetHostPlatformName());
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return g_host_name;
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} else {
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static ConstString g_remote_name("remote-freebsd");
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return g_remote_name;
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}
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}
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const char *PlatformFreeBSD::GetPluginDescriptionStatic(bool is_host) {
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if (is_host)
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return "Local FreeBSD user platform plug-in.";
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else
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return "Remote FreeBSD user platform plug-in.";
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}
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ConstString PlatformFreeBSD::GetPluginName() {
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return GetPluginNameStatic(IsHost());
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}
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void PlatformFreeBSD::Initialize() {
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Platform::Initialize();
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if (g_initialize_count++ == 0) {
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#if defined(__FreeBSD__)
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PlatformSP default_platform_sp(new PlatformFreeBSD(true));
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default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());
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Platform::SetHostPlatform(default_platform_sp);
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#endif
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PluginManager::RegisterPlugin(
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PlatformFreeBSD::GetPluginNameStatic(false),
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PlatformFreeBSD::GetPluginDescriptionStatic(false),
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PlatformFreeBSD::CreateInstance, nullptr);
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}
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}
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void PlatformFreeBSD::Terminate() {
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if (g_initialize_count > 0) {
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if (--g_initialize_count == 0) {
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PluginManager::UnregisterPlugin(PlatformFreeBSD::CreateInstance);
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}
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}
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PlatformPOSIX::Terminate();
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}
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//------------------------------------------------------------------
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/// Default Constructor
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//------------------------------------------------------------------
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PlatformFreeBSD::PlatformFreeBSD(bool is_host)
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: PlatformPOSIX(is_host) // This is the local host platform
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{}
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PlatformFreeBSD::~PlatformFreeBSD() = default;
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bool PlatformFreeBSD::GetSupportedArchitectureAtIndex(uint32_t idx,
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ArchSpec &arch) {
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if (IsHost()) {
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ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
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if (hostArch.GetTriple().isOSFreeBSD()) {
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if (idx == 0) {
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arch = hostArch;
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return arch.IsValid();
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} else if (idx == 1) {
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// If the default host architecture is 64-bit, look for a 32-bit variant
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if (hostArch.IsValid() && hostArch.GetTriple().isArch64Bit()) {
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arch = HostInfo::GetArchitecture(HostInfo::eArchKind32);
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return arch.IsValid();
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}
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}
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}
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} else {
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if (m_remote_platform_sp)
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return m_remote_platform_sp->GetSupportedArchitectureAtIndex(idx, arch);
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llvm::Triple triple;
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// Set the OS to FreeBSD
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triple.setOS(llvm::Triple::FreeBSD);
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// Set the architecture
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switch (idx) {
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case 0:
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triple.setArchName("x86_64");
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break;
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case 1:
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triple.setArchName("i386");
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break;
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case 2:
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triple.setArchName("aarch64");
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break;
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case 3:
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triple.setArchName("arm");
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break;
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case 4:
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triple.setArchName("mips64");
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break;
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case 5:
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triple.setArchName("mips");
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break;
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case 6:
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triple.setArchName("ppc64");
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break;
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case 7:
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triple.setArchName("ppc");
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break;
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default:
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return false;
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}
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// Leave the vendor as "llvm::Triple:UnknownVendor" and don't specify the
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// vendor by
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// calling triple.SetVendorName("unknown") so that it is a "unspecified
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// unknown".
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// This means when someone calls triple.GetVendorName() it will return an
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// empty string
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// which indicates that the vendor can be set when two architectures are
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// merged
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// Now set the triple into "arch" and return true
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arch.SetTriple(triple);
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return true;
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}
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return false;
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}
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void PlatformFreeBSD::GetStatus(Stream &strm) {
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Platform::GetStatus(strm);
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#ifndef LLDB_DISABLE_POSIX
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// Display local kernel information only when we are running in host mode.
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// Otherwise, we would end up printing non-FreeBSD information (when running
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// on Mac OS for example).
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if (IsHost()) {
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struct utsname un;
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if (uname(&un))
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return;
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strm.Printf(" Kernel: %s\n", un.sysname);
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strm.Printf(" Release: %s\n", un.release);
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strm.Printf(" Version: %s\n", un.version);
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}
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#endif
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}
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size_t
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PlatformFreeBSD::GetSoftwareBreakpointTrapOpcode(Target &target,
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BreakpointSite *bp_site) {
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switch (target.GetArchitecture().GetMachine()) {
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case llvm::Triple::arm: {
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lldb::BreakpointLocationSP bp_loc_sp(bp_site->GetOwnerAtIndex(0));
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AddressClass addr_class = eAddressClassUnknown;
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if (bp_loc_sp) {
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addr_class = bp_loc_sp->GetAddress().GetAddressClass();
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if (addr_class == eAddressClassUnknown &&
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(bp_loc_sp->GetAddress().GetFileAddress() & 1))
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addr_class = eAddressClassCodeAlternateISA;
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}
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if (addr_class == eAddressClassCodeAlternateISA) {
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// TODO: Enable when FreeBSD supports thumb breakpoints.
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// FreeBSD kernel as of 10.x, does not support thumb breakpoints
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return 0;
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}
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static const uint8_t g_arm_breakpoint_opcode[] = {0xFE, 0xDE, 0xFF, 0xE7};
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size_t trap_opcode_size = sizeof(g_arm_breakpoint_opcode);
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assert(bp_site);
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if (bp_site->SetTrapOpcode(g_arm_breakpoint_opcode, trap_opcode_size))
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return trap_opcode_size;
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}
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LLVM_FALLTHROUGH;
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default:
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return Platform::GetSoftwareBreakpointTrapOpcode(target, bp_site);
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}
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}
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Status PlatformFreeBSD::LaunchProcess(ProcessLaunchInfo &launch_info) {
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Status error;
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if (IsHost()) {
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error = Platform::LaunchProcess(launch_info);
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} else {
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if (m_remote_platform_sp)
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error = m_remote_platform_sp->LaunchProcess(launch_info);
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else
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error.SetErrorString("the platform is not currently connected");
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}
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return error;
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}
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lldb::ProcessSP PlatformFreeBSD::Attach(ProcessAttachInfo &attach_info,
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Debugger &debugger, Target *target,
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Status &error) {
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lldb::ProcessSP process_sp;
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if (IsHost()) {
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if (target == NULL) {
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TargetSP new_target_sp;
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ArchSpec emptyArchSpec;
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error = debugger.GetTargetList().CreateTarget(debugger, "", emptyArchSpec,
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false, m_remote_platform_sp,
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new_target_sp);
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target = new_target_sp.get();
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} else
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error.Clear();
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if (target && error.Success()) {
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debugger.GetTargetList().SetSelectedTarget(target);
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// The freebsd always currently uses the GDB remote debugger plug-in
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// so even when debugging locally we are debugging remotely!
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// Just like the darwin plugin.
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process_sp = target->CreateProcess(
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attach_info.GetListenerForProcess(debugger), "gdb-remote", NULL);
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if (process_sp)
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error = process_sp->Attach(attach_info);
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}
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} else {
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if (m_remote_platform_sp)
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process_sp =
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m_remote_platform_sp->Attach(attach_info, debugger, target, error);
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else
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error.SetErrorString("the platform is not currently connected");
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}
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return process_sp;
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}
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// FreeBSD processes cannot yet be launched by spawning and attaching.
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bool PlatformFreeBSD::CanDebugProcess() {
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return false;
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}
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void PlatformFreeBSD::CalculateTrapHandlerSymbolNames() {
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m_trap_handlers.push_back(ConstString("_sigtramp"));
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}
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uint64_t PlatformFreeBSD::ConvertMmapFlagsToPlatform(const ArchSpec &arch,
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unsigned flags) {
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uint64_t flags_platform = 0;
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if (flags & eMmapFlagsPrivate)
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flags_platform |= MAP_PRIVATE;
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if (flags & eMmapFlagsAnon)
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flags_platform |= MAP_ANON;
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return flags_platform;
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}
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