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//===-- 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;
}
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