2003-04-19 22:44:38 +00:00
|
|
|
//===- gccld.cpp - LLVM 'ld' compatible linker ----------------------------===//
|
2003-10-20 17:47:21 +00:00
|
|
|
//
|
|
|
|
// The LLVM Compiler Infrastructure
|
|
|
|
//
|
|
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
2002-01-24 19:12:12 +00:00
|
|
|
//
|
|
|
|
// This utility is intended to be compatible with GCC, and follows standard
|
2003-04-19 22:44:38 +00:00
|
|
|
// system 'ld' conventions. As such, the default output file is ./a.out.
|
2002-01-24 19:12:12 +00:00
|
|
|
// Additionally, this program outputs a shell script that is used to invoke LLI
|
|
|
|
// to execute the program. In this manner, the generated executable (a.out for
|
|
|
|
// example), is directly executable, whereas the bytecode file actually lives in
|
|
|
|
// the a.out.bc file generated by this program. Also, Force is on by default.
|
|
|
|
//
|
|
|
|
// Note that if someone (or a script) deletes the executable program generated,
|
|
|
|
// the .bc file will be left around. Considering that this is a temporary hack,
|
2003-05-23 20:27:07 +00:00
|
|
|
// I'm not too worried about this.
|
2002-01-24 19:12:12 +00:00
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
2003-09-22 20:21:34 +00:00
|
|
|
#include "gccld.h"
|
2004-11-14 23:00:08 +00:00
|
|
|
#include "llvm/Linker.h"
|
2002-01-24 19:12:12 +00:00
|
|
|
#include "llvm/Module.h"
|
2002-04-08 00:14:58 +00:00
|
|
|
#include "llvm/PassManager.h"
|
|
|
|
#include "llvm/Bytecode/Reader.h"
|
|
|
|
#include "llvm/Bytecode/WriteBytecodePass.h"
|
2003-04-24 19:13:02 +00:00
|
|
|
#include "llvm/Target/TargetData.h"
|
2002-07-23 22:04:43 +00:00
|
|
|
#include "llvm/Transforms/IPO.h"
|
|
|
|
#include "llvm/Transforms/Scalar.h"
|
2004-09-01 22:55:40 +00:00
|
|
|
#include "llvm/Support/CommandLine.h"
|
|
|
|
#include "llvm/Support/FileUtilities.h"
|
2004-05-27 05:41:36 +00:00
|
|
|
#include "llvm/System/Signals.h"
|
2004-09-01 22:55:40 +00:00
|
|
|
#include "llvm/Support/SystemUtils.h"
|
2002-01-24 19:12:12 +00:00
|
|
|
#include <fstream>
|
|
|
|
#include <memory>
|
2003-11-11 22:41:34 +00:00
|
|
|
using namespace llvm;
|
|
|
|
|
2003-04-18 23:01:25 +00:00
|
|
|
namespace {
|
|
|
|
cl::list<std::string>
|
|
|
|
InputFilenames(cl::Positional, cl::desc("<input bytecode files>"),
|
|
|
|
cl::OneOrMore);
|
2002-07-22 02:10:13 +00:00
|
|
|
|
2003-04-18 23:01:25 +00:00
|
|
|
cl::opt<std::string>
|
|
|
|
OutputFilename("o", cl::desc("Override output filename"), cl::init("a.out"),
|
|
|
|
cl::value_desc("filename"));
|
2002-07-22 02:10:13 +00:00
|
|
|
|
2003-04-18 23:01:25 +00:00
|
|
|
cl::opt<bool>
|
|
|
|
Verbose("v", cl::desc("Print information about actions taken"));
|
|
|
|
|
|
|
|
cl::list<std::string>
|
|
|
|
LibPaths("L", cl::desc("Specify a library search path"), cl::Prefix,
|
|
|
|
cl::value_desc("directory"));
|
2002-07-22 02:10:13 +00:00
|
|
|
|
2003-04-18 23:01:25 +00:00
|
|
|
cl::list<std::string>
|
|
|
|
Libraries("l", cl::desc("Specify libraries to link to"), cl::Prefix,
|
|
|
|
cl::value_desc("library prefix"));
|
2002-07-22 02:10:13 +00:00
|
|
|
|
2003-04-18 23:01:25 +00:00
|
|
|
cl::opt<bool>
|
2004-12-02 21:26:10 +00:00
|
|
|
Strip("strip-all", cl::desc("Strip all symbol info from executable"));
|
|
|
|
cl::opt<bool>
|
|
|
|
StripDebug("strip-debug",
|
|
|
|
cl::desc("Strip debugger symbol info from executable"));
|
2003-04-16 21:43:22 +00:00
|
|
|
|
2003-04-18 23:01:25 +00:00
|
|
|
cl::opt<bool>
|
|
|
|
NoInternalize("disable-internalize",
|
|
|
|
cl::desc("Do not mark all symbols as internal"));
|
2003-11-05 06:05:21 +00:00
|
|
|
cl::alias
|
2003-08-22 19:18:45 +00:00
|
|
|
ExportDynamic("export-dynamic", cl::desc("Alias for -disable-internalize"),
|
|
|
|
cl::aliasopt(NoInternalize));
|
2003-04-18 23:38:22 +00:00
|
|
|
|
2003-04-19 22:44:38 +00:00
|
|
|
cl::opt<bool>
|
|
|
|
LinkAsLibrary("link-as-library", cl::desc("Link the .bc files together as a"
|
|
|
|
" library, not an executable"));
|
2003-11-05 06:05:21 +00:00
|
|
|
cl::alias
|
|
|
|
Relink("r", cl::desc("Alias for -link-as-library"),
|
|
|
|
cl::aliasopt(LinkAsLibrary));
|
2003-04-19 22:44:38 +00:00
|
|
|
|
2003-09-16 21:27:35 +00:00
|
|
|
cl::opt<bool>
|
2003-09-22 20:21:34 +00:00
|
|
|
Native("native",
|
|
|
|
cl::desc("Generate a native binary instead of a shell script"));
|
2004-04-06 16:43:13 +00:00
|
|
|
cl::opt<bool>
|
|
|
|
NativeCBE("native-cbe",
|
|
|
|
cl::desc("Generate a native binary with the C backend and GCC"));
|
2003-09-16 21:27:35 +00:00
|
|
|
|
2003-09-18 16:22:26 +00:00
|
|
|
// Compatibility options that are ignored but supported by LD
|
2003-04-18 23:38:22 +00:00
|
|
|
cl::opt<std::string>
|
|
|
|
CO3("soname", cl::Hidden, cl::desc("Compatibility option: ignored"));
|
|
|
|
cl::opt<std::string>
|
|
|
|
CO4("version-script", cl::Hidden, cl::desc("Compatibility option: ignored"));
|
|
|
|
cl::opt<bool>
|
|
|
|
CO5("eh-frame-hdr", cl::Hidden, cl::desc("Compatibility option: ignored"));
|
2003-12-09 15:39:11 +00:00
|
|
|
cl::opt<std::string>
|
|
|
|
CO6("h", cl::Hidden, cl::desc("Compatibility option: ignored"));
|
2004-12-02 21:26:10 +00:00
|
|
|
|
|
|
|
cl::alias A0("s", cl::desc("Alias for --strip-all"),
|
|
|
|
cl::aliasopt(Strip));
|
|
|
|
cl::alias A1("S", cl::desc("Alias for --strip-debug"),
|
|
|
|
cl::aliasopt(StripDebug));
|
2003-04-18 23:01:25 +00:00
|
|
|
}
|
2002-01-24 19:12:12 +00:00
|
|
|
|
2004-06-02 00:22:24 +00:00
|
|
|
/// PrintAndReturn - Prints a message to standard error and returns true.
|
2003-11-20 06:21:54 +00:00
|
|
|
///
|
|
|
|
/// Inputs:
|
|
|
|
/// progname - The name of the program (i.e. argv[0]).
|
|
|
|
/// Message - The message to print to standard error.
|
|
|
|
///
|
2004-06-02 00:22:24 +00:00
|
|
|
static int PrintAndReturn(const char *progname, const std::string &Message) {
|
|
|
|
std::cerr << progname << ": " << Message << "\n";
|
2003-09-19 20:24:23 +00:00
|
|
|
return 1;
|
2002-01-24 19:12:12 +00:00
|
|
|
}
|
|
|
|
|
2004-06-02 00:10:19 +00:00
|
|
|
/// EmitShellScript - Output the wrapper file that invokes the JIT on the LLVM
|
|
|
|
/// bytecode file for the program.
|
|
|
|
static void EmitShellScript(char **argv) {
|
2004-06-02 00:53:57 +00:00
|
|
|
#if defined(_WIN32) || defined(__CYGWIN__)
|
|
|
|
// Windows doesn't support #!/bin/sh style shell scripts in .exe files. To
|
|
|
|
// support windows systems, we copy the llvm-stub.exe executable from the
|
|
|
|
// build tree to the destination file.
|
|
|
|
std::string llvmstub = FindExecutable("llvm-stub.exe", argv[0]);
|
|
|
|
if (llvmstub.empty()) {
|
|
|
|
std::cerr << "Could not find llvm-stub.exe executable!\n";
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
if (CopyFile(OutputFilename, llvmstub)) {
|
|
|
|
std::cerr << "Could not copy the llvm-stub.exe executable!\n";
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
#endif
|
|
|
|
|
2004-06-02 00:10:19 +00:00
|
|
|
// Output the script to start the program...
|
|
|
|
std::ofstream Out2(OutputFilename.c_str());
|
|
|
|
if (!Out2.good())
|
|
|
|
exit(PrintAndReturn(argv[0], "error opening '" + OutputFilename +
|
|
|
|
"' for writing!"));
|
|
|
|
|
|
|
|
Out2 << "#!/bin/sh\n";
|
|
|
|
// Allow user to setenv LLVMINTERP if lli is not in their PATH.
|
|
|
|
Out2 << "lli=${LLVMINTERP-lli}\n";
|
|
|
|
Out2 << "exec $lli \\\n";
|
|
|
|
// gcc accepts -l<lib> and implicitly searches /lib and /usr/lib.
|
|
|
|
LibPaths.push_back("/lib");
|
|
|
|
LibPaths.push_back("/usr/lib");
|
|
|
|
LibPaths.push_back("/usr/X11R6/lib");
|
|
|
|
// We don't need to link in libc! In fact, /usr/lib/libc.so may not be a
|
|
|
|
// shared object at all! See RH 8: plain text.
|
|
|
|
std::vector<std::string>::iterator libc =
|
|
|
|
std::find(Libraries.begin(), Libraries.end(), "c");
|
|
|
|
if (libc != Libraries.end()) Libraries.erase(libc);
|
|
|
|
// List all the shared object (native) libraries this executable will need
|
|
|
|
// on the command line, so that we don't have to do this manually!
|
|
|
|
for (std::vector<std::string>::iterator i = Libraries.begin(),
|
|
|
|
e = Libraries.end(); i != e; ++i) {
|
|
|
|
std::string FullLibraryPath = FindLib(*i, LibPaths, true);
|
|
|
|
if (!FullLibraryPath.empty() && IsSharedObject(FullLibraryPath))
|
|
|
|
Out2 << " -load=" << FullLibraryPath << " \\\n";
|
|
|
|
}
|
|
|
|
Out2 << " $0.bc ${1+\"$@\"}\n";
|
|
|
|
Out2.close();
|
|
|
|
}
|
2003-09-17 15:20:51 +00:00
|
|
|
|
2003-09-30 17:59:25 +00:00
|
|
|
int main(int argc, char **argv, char **envp) {
|
2003-04-19 22:44:38 +00:00
|
|
|
cl::ParseCommandLineOptions(argc, argv, " llvm linker for GCC\n");
|
2004-08-29 19:28:55 +00:00
|
|
|
sys::PrintStackTraceOnErrorSignal();
|
2002-01-24 19:12:12 +00:00
|
|
|
|
2004-11-14 22:17:03 +00:00
|
|
|
int exitCode = 0;
|
|
|
|
|
|
|
|
try {
|
|
|
|
// Remove any consecutive duplicates of the same library...
|
|
|
|
Libraries.erase(std::unique(Libraries.begin(), Libraries.end()),
|
|
|
|
Libraries.end());
|
|
|
|
|
2004-12-05 19:15:29 +00:00
|
|
|
// Set up the Composite module.
|
|
|
|
std::auto_ptr<Module> Composite(0);
|
|
|
|
|
|
|
|
if (LinkAsLibrary) {
|
2004-12-08 05:17:40 +00:00
|
|
|
// Link in only the files.
|
2004-12-05 19:15:29 +00:00
|
|
|
Composite.reset( new Module(argv[0]) );
|
|
|
|
if (LinkFiles(argv[0], Composite.get(), InputFilenames, Verbose))
|
|
|
|
return 1; // Error already printed
|
2004-12-08 05:17:40 +00:00
|
|
|
// The libraries aren't linked in but are noted as "dependent" in the
|
|
|
|
// module.
|
|
|
|
for (cl::list<std::string>::const_iterator I = Libraries.begin(),
|
|
|
|
E = Libraries.end(); I != E ; ++I) {
|
|
|
|
Composite.get()->addLibrary(*I);
|
|
|
|
}
|
|
|
|
|
2004-12-05 19:15:29 +00:00
|
|
|
} else {
|
|
|
|
// Build a list of the items from our command line
|
|
|
|
LinkItemList Items;
|
|
|
|
BuildLinkItems(Items, InputFilenames, Libraries);
|
|
|
|
|
|
|
|
// Link all the items together
|
|
|
|
Composite.reset( LinkItems(argv[0], Items, LibPaths, Verbose, Native) );
|
|
|
|
|
|
|
|
// Check for an error during linker
|
|
|
|
if (!Composite.get())
|
|
|
|
return 1; // Error already printed
|
|
|
|
}
|
2004-11-14 22:17:03 +00:00
|
|
|
|
|
|
|
// Create the output file.
|
|
|
|
std::string RealBytecodeOutput = OutputFilename;
|
|
|
|
if (!LinkAsLibrary) RealBytecodeOutput += ".bc";
|
|
|
|
std::ofstream Out(RealBytecodeOutput.c_str());
|
|
|
|
if (!Out.good())
|
|
|
|
return PrintAndReturn(argv[0], "error opening '" + RealBytecodeOutput +
|
|
|
|
"' for writing!");
|
|
|
|
|
|
|
|
// Ensure that the bytecode file gets removed from the disk if we get a
|
|
|
|
// SIGINT signal.
|
|
|
|
sys::RemoveFileOnSignal(sys::Path(RealBytecodeOutput));
|
|
|
|
|
2004-12-12 07:53:51 +00:00
|
|
|
// Strip everything if Strip is set, otherwise if stripdebug is set, just
|
|
|
|
// strip debug info.
|
2004-12-02 21:26:10 +00:00
|
|
|
int StripLevel = Strip ? 2 : (StripDebug ? 1 : 0);
|
2004-12-12 07:53:51 +00:00
|
|
|
|
|
|
|
// Internalize the module if neither -disable-internalize nor
|
|
|
|
// -link-as-library are passed in.
|
|
|
|
bool ShouldInternalize = !NoInternalize & !LinkAsLibrary;
|
|
|
|
|
|
|
|
// Generate the bytecode file.
|
|
|
|
if (GenerateBytecode(Composite.get(), StripLevel, ShouldInternalize, &Out)){
|
2004-11-14 22:17:03 +00:00
|
|
|
Out.close();
|
|
|
|
return PrintAndReturn(argv[0], "error generating bytecode");
|
|
|
|
}
|
2002-04-18 19:55:25 +00:00
|
|
|
|
2004-11-14 22:17:03 +00:00
|
|
|
// Close the bytecode file.
|
2003-09-18 16:22:26 +00:00
|
|
|
Out.close();
|
|
|
|
|
2004-11-14 22:17:03 +00:00
|
|
|
// If we are not linking a library, generate either a native executable
|
|
|
|
// or a JIT shell script, depending upon what the user wants.
|
|
|
|
if (!LinkAsLibrary) {
|
|
|
|
// If the user wants to generate a native executable, compile it from the
|
|
|
|
// bytecode file.
|
|
|
|
//
|
|
|
|
// Otherwise, create a script that will run the bytecode through the JIT.
|
|
|
|
if (Native) {
|
|
|
|
// Name of the Assembly Language output file
|
|
|
|
std::string AssemblyFile = OutputFilename + ".s";
|
|
|
|
|
|
|
|
// Mark the output files for removal if we get an interrupt.
|
|
|
|
sys::RemoveFileOnSignal(sys::Path(AssemblyFile));
|
|
|
|
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
|
|
|
|
|
|
|
|
// Determine the locations of the llc and gcc programs.
|
|
|
|
std::string llc = FindExecutable("llc", argv[0]);
|
|
|
|
std::string gcc = FindExecutable("gcc", argv[0]);
|
|
|
|
if (llc.empty())
|
|
|
|
return PrintAndReturn(argv[0], "Failed to find llc");
|
|
|
|
|
|
|
|
if (gcc.empty())
|
|
|
|
return PrintAndReturn(argv[0], "Failed to find gcc");
|
|
|
|
|
|
|
|
// Generate an assembly language file for the bytecode.
|
|
|
|
if (Verbose) std::cout << "Generating Assembly Code\n";
|
|
|
|
GenerateAssembly(AssemblyFile, RealBytecodeOutput, llc, envp);
|
|
|
|
if (Verbose) std::cout << "Generating Native Code\n";
|
|
|
|
GenerateNative(OutputFilename, AssemblyFile, Libraries, LibPaths,
|
|
|
|
gcc, envp);
|
|
|
|
|
|
|
|
// Remove the assembly language file.
|
|
|
|
removeFile (AssemblyFile);
|
|
|
|
} else if (NativeCBE) {
|
|
|
|
std::string CFile = OutputFilename + ".cbe.c";
|
|
|
|
|
|
|
|
// Mark the output files for removal if we get an interrupt.
|
|
|
|
sys::RemoveFileOnSignal(sys::Path(CFile));
|
|
|
|
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
|
|
|
|
|
|
|
|
// Determine the locations of the llc and gcc programs.
|
|
|
|
std::string llc = FindExecutable("llc", argv[0]);
|
|
|
|
std::string gcc = FindExecutable("gcc", argv[0]);
|
|
|
|
if (llc.empty())
|
|
|
|
return PrintAndReturn(argv[0], "Failed to find llc");
|
|
|
|
if (gcc.empty())
|
|
|
|
return PrintAndReturn(argv[0], "Failed to find gcc");
|
|
|
|
|
|
|
|
// Generate an assembly language file for the bytecode.
|
|
|
|
if (Verbose) std::cout << "Generating Assembly Code\n";
|
|
|
|
GenerateCFile(CFile, RealBytecodeOutput, llc, envp);
|
|
|
|
if (Verbose) std::cout << "Generating Native Code\n";
|
|
|
|
GenerateNative(OutputFilename, CFile, Libraries, LibPaths, gcc, envp);
|
|
|
|
|
|
|
|
// Remove the assembly language file.
|
|
|
|
removeFile(CFile);
|
|
|
|
|
|
|
|
} else {
|
|
|
|
EmitShellScript(argv);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Make the script executable...
|
|
|
|
MakeFileExecutable(OutputFilename);
|
|
|
|
|
|
|
|
// Make the bytecode file readable and directly executable in LLEE as well
|
|
|
|
MakeFileExecutable(RealBytecodeOutput);
|
|
|
|
MakeFileReadable(RealBytecodeOutput);
|
2003-09-16 21:27:35 +00:00
|
|
|
}
|
2004-11-14 22:17:03 +00:00
|
|
|
} catch (const char*msg) {
|
|
|
|
std::cerr << argv[0] << ": " << msg << "\n";
|
|
|
|
exitCode = 1;
|
|
|
|
} catch (const std::string& msg) {
|
|
|
|
std::cerr << argv[0] << ": " << msg << "\n";
|
|
|
|
exitCode = 2;
|
|
|
|
} catch (...) {
|
|
|
|
// This really shouldn't happen, but just in case ....
|
|
|
|
std::cerr << argv[0] << ": An nexpected unknown exception occurred.\n";
|
|
|
|
exitCode = 3;
|
2003-04-19 22:44:38 +00:00
|
|
|
}
|
2002-01-24 19:12:12 +00:00
|
|
|
|
2004-11-14 22:17:03 +00:00
|
|
|
return exitCode;
|
2002-01-24 19:12:12 +00:00
|
|
|
}
|