mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 03:29:40 +00:00
Reviewers: ruiu Reviewed By: ruiu CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D3097 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204120 91177308-0d34-0410-b5e6-96231b3b80d8
630 lines
20 KiB
C++
630 lines
20 KiB
C++
//===-- llvm-nm.cpp - Symbol table dumping utility for llvm ---------------===//
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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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//
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// This program is a utility that works like traditional Unix "nm", that is, it
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// prints out the names of symbols in a bitcode or object file, along with some
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// information about each symbol.
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//
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// This "nm" supports many of the features of GNU "nm", including its different
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// output formats.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalAlias.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/COFF.h"
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#include "llvm/Object/ELFObjectFile.h"
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#include "llvm/Object/IRObjectFile.h"
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#include "llvm/Object/MachO.h"
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#include "llvm/Object/MachOUniversal.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Program.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/system_error.h"
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#include <algorithm>
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#include <cctype>
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#include <cerrno>
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#include <cstring>
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#include <vector>
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using namespace llvm;
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using namespace object;
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namespace {
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enum OutputFormatTy { bsd, sysv, posix };
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cl::opt<OutputFormatTy> OutputFormat(
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"format", cl::desc("Specify output format"),
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cl::values(clEnumVal(bsd, "BSD format"), clEnumVal(sysv, "System V format"),
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clEnumVal(posix, "POSIX.2 format"), clEnumValEnd),
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cl::init(bsd));
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cl::alias OutputFormat2("f", cl::desc("Alias for --format"),
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cl::aliasopt(OutputFormat));
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cl::list<std::string> InputFilenames(cl::Positional, cl::desc("<input files>"),
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cl::ZeroOrMore);
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cl::opt<bool> UndefinedOnly("undefined-only",
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cl::desc("Show only undefined symbols"));
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cl::alias UndefinedOnly2("u", cl::desc("Alias for --undefined-only"),
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cl::aliasopt(UndefinedOnly));
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cl::opt<bool> DynamicSyms("dynamic",
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cl::desc("Display the dynamic symbols instead "
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"of normal symbols."));
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cl::alias DynamicSyms2("D", cl::desc("Alias for --dynamic"),
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cl::aliasopt(DynamicSyms));
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cl::opt<bool> DefinedOnly("defined-only",
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cl::desc("Show only defined symbols"));
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cl::opt<bool> ExternalOnly("extern-only",
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cl::desc("Show only external symbols"));
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cl::alias ExternalOnly2("g", cl::desc("Alias for --extern-only"),
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cl::aliasopt(ExternalOnly));
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cl::opt<bool> BSDFormat("B", cl::desc("Alias for --format=bsd"));
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cl::opt<bool> POSIXFormat("P", cl::desc("Alias for --format=posix"));
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cl::opt<bool> PrintFileName(
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"print-file-name",
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cl::desc("Precede each symbol with the object file it came from"));
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cl::alias PrintFileNameA("A", cl::desc("Alias for --print-file-name"),
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cl::aliasopt(PrintFileName));
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cl::alias PrintFileNameo("o", cl::desc("Alias for --print-file-name"),
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cl::aliasopt(PrintFileName));
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cl::opt<bool> DebugSyms("debug-syms",
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cl::desc("Show all symbols, even debugger only"));
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cl::alias DebugSymsa("a", cl::desc("Alias for --debug-syms"),
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cl::aliasopt(DebugSyms));
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cl::opt<bool> NumericSort("numeric-sort", cl::desc("Sort symbols by address"));
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cl::alias NumericSortn("n", cl::desc("Alias for --numeric-sort"),
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cl::aliasopt(NumericSort));
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cl::alias NumericSortv("v", cl::desc("Alias for --numeric-sort"),
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cl::aliasopt(NumericSort));
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cl::opt<bool> NoSort("no-sort", cl::desc("Show symbols in order encountered"));
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cl::alias NoSortp("p", cl::desc("Alias for --no-sort"), cl::aliasopt(NoSort));
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cl::opt<bool> PrintSize("print-size",
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cl::desc("Show symbol size instead of address"));
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cl::alias PrintSizeS("S", cl::desc("Alias for --print-size"),
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cl::aliasopt(PrintSize));
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cl::opt<bool> SizeSort("size-sort", cl::desc("Sort symbols by size"));
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cl::opt<bool> WithoutAliases("without-aliases", cl::Hidden,
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cl::desc("Exclude aliases from output"));
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cl::opt<bool> ArchiveMap("print-armap", cl::desc("Print the archive map"));
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cl::alias ArchiveMaps("s", cl::desc("Alias for --print-armap"),
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cl::aliasopt(ArchiveMap));
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bool PrintAddress = true;
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bool MultipleFiles = false;
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bool HadError = false;
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std::string ToolName;
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}
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static void error(Twine Message, Twine Path = Twine()) {
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HadError = true;
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errs() << ToolName << ": " << Path << ": " << Message << ".\n";
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}
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static bool error(error_code EC, Twine Path = Twine()) {
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if (EC) {
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error(EC.message(), Path);
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return true;
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}
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return false;
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}
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namespace {
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struct NMSymbol {
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uint64_t Address;
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uint64_t Size;
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char TypeChar;
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StringRef Name;
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};
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}
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static bool compareSymbolAddress(const NMSymbol &A, const NMSymbol &B) {
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if (A.Address < B.Address)
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return true;
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else if (A.Address == B.Address && A.Name < B.Name)
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return true;
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else if (A.Address == B.Address && A.Name == B.Name && A.Size < B.Size)
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return true;
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else
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return false;
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}
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static bool compareSymbolSize(const NMSymbol &A, const NMSymbol &B) {
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if (A.Size < B.Size)
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return true;
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else if (A.Size == B.Size && A.Name < B.Name)
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return true;
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else if (A.Size == B.Size && A.Name == B.Name && A.Address < B.Address)
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return true;
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else
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return false;
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}
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static bool compareSymbolName(const NMSymbol &A, const NMSymbol &B) {
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if (A.Name < B.Name)
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return true;
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else if (A.Name == B.Name && A.Size < B.Size)
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return true;
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else if (A.Name == B.Name && A.Size == B.Size && A.Address < B.Address)
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return true;
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else
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return false;
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}
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static StringRef CurrentFilename;
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typedef std::vector<NMSymbol> SymbolListT;
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static SymbolListT SymbolList;
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static void sortAndPrintSymbolList() {
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if (!NoSort) {
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if (NumericSort)
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std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolAddress);
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else if (SizeSort)
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std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolSize);
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else
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std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolName);
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}
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if (OutputFormat == posix && MultipleFiles) {
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outs() << '\n' << CurrentFilename << ":\n";
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} else if (OutputFormat == bsd && MultipleFiles) {
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outs() << "\n" << CurrentFilename << ":\n";
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} else if (OutputFormat == sysv) {
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outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n"
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<< "Name Value Class Type"
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<< " Size Line Section\n";
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}
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for (SymbolListT::iterator I = SymbolList.begin(), E = SymbolList.end();
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I != E; ++I) {
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if ((I->TypeChar != 'U') && UndefinedOnly)
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continue;
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if ((I->TypeChar == 'U') && DefinedOnly)
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continue;
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if (SizeSort && !PrintAddress && I->Size == UnknownAddressOrSize)
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continue;
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char SymbolAddrStr[10] = "";
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char SymbolSizeStr[10] = "";
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if (OutputFormat == sysv || I->Address == UnknownAddressOrSize)
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strcpy(SymbolAddrStr, " ");
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if (OutputFormat == sysv)
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strcpy(SymbolSizeStr, " ");
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if (I->Address != UnknownAddressOrSize)
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format("%08" PRIx64, I->Address)
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.print(SymbolAddrStr, sizeof(SymbolAddrStr));
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if (I->Size != UnknownAddressOrSize)
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format("%08" PRIx64, I->Size).print(SymbolSizeStr, sizeof(SymbolSizeStr));
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if (OutputFormat == posix) {
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outs() << I->Name << " " << I->TypeChar << " " << SymbolAddrStr
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<< SymbolSizeStr << "\n";
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} else if (OutputFormat == bsd) {
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if (PrintAddress)
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outs() << SymbolAddrStr << ' ';
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if (PrintSize) {
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outs() << SymbolSizeStr;
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if (I->Size != UnknownAddressOrSize)
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outs() << ' ';
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}
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outs() << I->TypeChar << " " << I->Name << "\n";
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} else if (OutputFormat == sysv) {
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std::string PaddedName(I->Name);
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while (PaddedName.length() < 20)
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PaddedName += " ";
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outs() << PaddedName << "|" << SymbolAddrStr << "| " << I->TypeChar
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<< " | |" << SymbolSizeStr << "| |\n";
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}
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}
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SymbolList.clear();
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}
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template <class ELFT>
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static char getSymbolNMTypeChar(ELFObjectFile<ELFT> &Obj,
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basic_symbol_iterator I) {
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typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
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typedef typename ELFObjectFile<ELFT>::Elf_Shdr Elf_Shdr;
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// OK, this is ELF
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symbol_iterator SymI(I);
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DataRefImpl Symb = I->getRawDataRefImpl();
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const Elf_Sym *ESym = Obj.getSymbol(Symb);
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const ELFFile<ELFT> &EF = *Obj.getELFFile();
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const Elf_Shdr *ESec = EF.getSection(ESym);
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if (ESec) {
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switch (ESec->sh_type) {
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case ELF::SHT_PROGBITS:
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case ELF::SHT_DYNAMIC:
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switch (ESec->sh_flags) {
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case(ELF::SHF_ALLOC | ELF::SHF_EXECINSTR) :
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return 't';
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case(ELF::SHF_TLS | ELF::SHF_ALLOC | ELF::SHF_WRITE) :
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case(ELF::SHF_ALLOC | ELF::SHF_WRITE) :
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return 'd';
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case ELF::SHF_ALLOC:
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case(ELF::SHF_ALLOC | ELF::SHF_MERGE) :
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case(ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS) :
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return 'r';
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}
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break;
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case ELF::SHT_NOBITS:
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return 'b';
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}
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}
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if (ESym->getType() == ELF::STT_SECTION) {
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StringRef Name;
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if (error(SymI->getName(Name)))
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return '?';
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return StringSwitch<char>(Name)
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.StartsWith(".debug", 'N')
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.StartsWith(".note", 'n')
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.Default('?');
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}
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return '?';
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}
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static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
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const coff_symbol *Symb = Obj.getCOFFSymbol(*I);
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// OK, this is COFF.
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symbol_iterator SymI(I);
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StringRef Name;
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if (error(SymI->getName(Name)))
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return '?';
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char Ret = StringSwitch<char>(Name)
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.StartsWith(".debug", 'N')
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.StartsWith(".sxdata", 'N')
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.Default('?');
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if (Ret != '?')
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return Ret;
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uint32_t Characteristics = 0;
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if (Symb->SectionNumber > 0 &&
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Symb->SectionNumber != llvm::COFF::IMAGE_SYM_DEBUG &&
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Symb->SectionNumber != llvm::COFF::IMAGE_SYM_ABSOLUTE) {
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section_iterator SecI = Obj.section_end();
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if (error(SymI->getSection(SecI)))
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return '?';
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const coff_section *Section = Obj.getCOFFSection(*SecI);
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Characteristics = Section->Characteristics;
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}
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switch (Symb->SectionNumber) {
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case COFF::IMAGE_SYM_DEBUG:
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return 'n';
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default:
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// Check section type.
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if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
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return 't';
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else if (Characteristics & COFF::IMAGE_SCN_MEM_READ &&
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~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
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return 'r';
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else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
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return 'd';
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else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
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return 'b';
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else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
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return 'i';
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// Check for section symbol.
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else if (Symb->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC &&
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Symb->Value == 0)
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return 's';
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}
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return '?';
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}
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static uint8_t getNType(MachOObjectFile &Obj, DataRefImpl Symb) {
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if (Obj.is64Bit()) {
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MachO::nlist_64 STE = Obj.getSymbol64TableEntry(Symb);
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return STE.n_type;
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}
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MachO::nlist STE = Obj.getSymbolTableEntry(Symb);
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return STE.n_type;
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}
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static char getSymbolNMTypeChar(MachOObjectFile &Obj, basic_symbol_iterator I) {
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DataRefImpl Symb = I->getRawDataRefImpl();
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uint8_t NType = getNType(Obj, Symb);
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switch (NType & MachO::N_TYPE) {
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case MachO::N_ABS:
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return 's';
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case MachO::N_SECT: {
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section_iterator Sec = Obj.section_end();
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Obj.getSymbolSection(Symb, Sec);
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DataRefImpl Ref = Sec->getRawDataRefImpl();
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StringRef SectionName;
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Obj.getSectionName(Ref, SectionName);
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StringRef SegmentName = Obj.getSectionFinalSegmentName(Ref);
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if (SegmentName == "__TEXT" && SectionName == "__text")
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return 't';
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else
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return 's';
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}
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}
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return '?';
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}
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static char getSymbolNMTypeChar(const GlobalValue &GV) {
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if (isa<Function>(GV))
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return 't';
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// FIXME: should we print 'b'? At the IR level we cannot be sure if this
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// will be in bss or not, but we could approximate.
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if (isa<GlobalVariable>(GV))
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return 'd';
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const GlobalAlias *GA = cast<GlobalAlias>(&GV);
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const GlobalValue *AliasedGV = GA->getAliasedGlobal();
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return getSymbolNMTypeChar(*AliasedGV);
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}
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static char getSymbolNMTypeChar(IRObjectFile &Obj, basic_symbol_iterator I) {
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const GlobalValue &GV = Obj.getSymbolGV(I->getRawDataRefImpl());
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return getSymbolNMTypeChar(GV);
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}
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template <class ELFT>
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static bool isObject(ELFObjectFile<ELFT> &Obj, symbol_iterator I) {
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typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
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DataRefImpl Symb = I->getRawDataRefImpl();
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const Elf_Sym *ESym = Obj.getSymbol(Symb);
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return ESym->getType() == ELF::STT_OBJECT;
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}
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static bool isObject(SymbolicFile *Obj, basic_symbol_iterator I) {
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if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
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return isObject(*ELF, I);
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if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
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return isObject(*ELF, I);
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if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
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return isObject(*ELF, I);
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if (ELF64BEObjectFile *ELF = dyn_cast<ELF64BEObjectFile>(Obj))
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return isObject(*ELF, I);
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return false;
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}
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static char getNMTypeChar(SymbolicFile *Obj, basic_symbol_iterator I) {
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uint32_t Symflags = I->getFlags();
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if ((Symflags & object::SymbolRef::SF_Weak) && !isa<MachOObjectFile>(Obj)) {
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char Ret = isObject(Obj, I) ? 'v' : 'w';
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if (!(Symflags & object::SymbolRef::SF_Undefined))
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Ret = toupper(Ret);
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return Ret;
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}
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if (Symflags & object::SymbolRef::SF_Undefined)
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return 'U';
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if (Symflags & object::SymbolRef::SF_Common)
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return 'C';
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char Ret = '?';
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if (Symflags & object::SymbolRef::SF_Absolute)
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Ret = 'a';
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else if (IRObjectFile *IR = dyn_cast<IRObjectFile>(Obj))
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Ret = getSymbolNMTypeChar(*IR, I);
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else if (COFFObjectFile *COFF = dyn_cast<COFFObjectFile>(Obj))
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Ret = getSymbolNMTypeChar(*COFF, I);
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else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj))
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Ret = getSymbolNMTypeChar(*MachO, I);
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else if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
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Ret = getSymbolNMTypeChar(*ELF, I);
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else if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
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Ret = getSymbolNMTypeChar(*ELF, I);
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else if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
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Ret = getSymbolNMTypeChar(*ELF, I);
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else
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Ret = getSymbolNMTypeChar(*cast<ELF64BEObjectFile>(Obj), I);
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if (Symflags & object::SymbolRef::SF_Global)
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Ret = toupper(Ret);
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return Ret;
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}
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static void dumpSymbolNamesFromObject(SymbolicFile *Obj) {
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basic_symbol_iterator IBegin = Obj->symbol_begin();
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basic_symbol_iterator IEnd = Obj->symbol_end();
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if (DynamicSyms) {
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if (!Obj->isELF()) {
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error("File format has no dynamic symbol table", Obj->getFileName());
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return;
|
|
}
|
|
std::pair<symbol_iterator, symbol_iterator> IDyn =
|
|
getELFDynamicSymbolIterators(Obj);
|
|
IBegin = IDyn.first;
|
|
IEnd = IDyn.second;
|
|
}
|
|
std::string NameBuffer;
|
|
raw_string_ostream OS(NameBuffer);
|
|
for (basic_symbol_iterator I = IBegin; I != IEnd; ++I) {
|
|
uint32_t SymFlags = I->getFlags();
|
|
if (!DebugSyms && (SymFlags & SymbolRef::SF_FormatSpecific))
|
|
continue;
|
|
if (WithoutAliases) {
|
|
if (IRObjectFile *IR = dyn_cast<IRObjectFile>(Obj)) {
|
|
const GlobalValue &GV = IR->getSymbolGV(I->getRawDataRefImpl());
|
|
if(isa<GlobalAlias>(GV))
|
|
continue;
|
|
}
|
|
}
|
|
NMSymbol S;
|
|
S.Size = UnknownAddressOrSize;
|
|
S.Address = UnknownAddressOrSize;
|
|
if ((PrintSize || SizeSort) && isa<ObjectFile>(Obj)) {
|
|
symbol_iterator SymI = I;
|
|
if (error(SymI->getSize(S.Size)))
|
|
break;
|
|
}
|
|
if (PrintAddress && isa<ObjectFile>(Obj))
|
|
if (error(symbol_iterator(I)->getAddress(S.Address)))
|
|
break;
|
|
S.TypeChar = getNMTypeChar(Obj, I);
|
|
if (error(I->printName(OS)))
|
|
break;
|
|
OS << '\0';
|
|
SymbolList.push_back(S);
|
|
}
|
|
|
|
OS.flush();
|
|
const char *P = NameBuffer.c_str();
|
|
for (unsigned I = 0; I < SymbolList.size(); ++I) {
|
|
SymbolList[I].Name = P;
|
|
P += strlen(P) + 1;
|
|
}
|
|
|
|
CurrentFilename = Obj->getFileName();
|
|
sortAndPrintSymbolList();
|
|
}
|
|
|
|
static void dumpSymbolNamesFromFile(std::string &Filename) {
|
|
std::unique_ptr<MemoryBuffer> Buffer;
|
|
if (error(MemoryBuffer::getFileOrSTDIN(Filename, Buffer), Filename))
|
|
return;
|
|
|
|
LLVMContext &Context = getGlobalContext();
|
|
ErrorOr<Binary *> BinaryOrErr = createBinary(Buffer.release(), &Context);
|
|
if (error(BinaryOrErr.getError(), Filename))
|
|
return;
|
|
std::unique_ptr<Binary> Bin(BinaryOrErr.get());
|
|
|
|
if (Archive *A = dyn_cast<Archive>(Bin.get())) {
|
|
if (ArchiveMap) {
|
|
Archive::symbol_iterator I = A->symbol_begin();
|
|
Archive::symbol_iterator E = A->symbol_end();
|
|
if (I != E) {
|
|
outs() << "Archive map\n";
|
|
for (; I != E; ++I) {
|
|
Archive::child_iterator C;
|
|
StringRef SymName;
|
|
StringRef FileName;
|
|
if (error(I->getMember(C)))
|
|
return;
|
|
if (error(I->getName(SymName)))
|
|
return;
|
|
if (error(C->getName(FileName)))
|
|
return;
|
|
outs() << SymName << " in " << FileName << "\n";
|
|
}
|
|
outs() << "\n";
|
|
}
|
|
}
|
|
|
|
for (Archive::child_iterator I = A->child_begin(), E = A->child_end();
|
|
I != E; ++I) {
|
|
std::unique_ptr<Binary> Child;
|
|
if (I->getAsBinary(Child, &Context))
|
|
continue;
|
|
if (SymbolicFile *O = dyn_cast<SymbolicFile>(Child.get())) {
|
|
outs() << O->getFileName() << ":\n";
|
|
dumpSymbolNamesFromObject(O);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(Bin.get())) {
|
|
for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
|
|
E = UB->end_objects();
|
|
I != E; ++I) {
|
|
std::unique_ptr<ObjectFile> Obj;
|
|
if (!I->getAsObjectFile(Obj)) {
|
|
outs() << Obj->getFileName() << ":\n";
|
|
dumpSymbolNamesFromObject(Obj.get());
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
if (SymbolicFile *O = dyn_cast<SymbolicFile>(Bin.get())) {
|
|
dumpSymbolNamesFromObject(O);
|
|
return;
|
|
}
|
|
error("unrecognizable file type", Filename);
|
|
return;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
// Print a stack trace if we signal out.
|
|
sys::PrintStackTraceOnErrorSignal();
|
|
PrettyStackTraceProgram X(argc, argv);
|
|
|
|
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
|
|
cl::ParseCommandLineOptions(argc, argv, "llvm symbol table dumper\n");
|
|
|
|
// llvm-nm only reads binary files.
|
|
if (error(sys::ChangeStdinToBinary()))
|
|
return 1;
|
|
|
|
ToolName = argv[0];
|
|
if (BSDFormat)
|
|
OutputFormat = bsd;
|
|
if (POSIXFormat)
|
|
OutputFormat = posix;
|
|
|
|
// The relative order of these is important. If you pass --size-sort it should
|
|
// only print out the size. However, if you pass -S --size-sort, it should
|
|
// print out both the size and address.
|
|
if (SizeSort && !PrintSize)
|
|
PrintAddress = false;
|
|
if (OutputFormat == sysv || SizeSort)
|
|
PrintSize = true;
|
|
|
|
switch (InputFilenames.size()) {
|
|
case 0:
|
|
InputFilenames.push_back("-");
|
|
case 1:
|
|
break;
|
|
default:
|
|
MultipleFiles = true;
|
|
}
|
|
|
|
std::for_each(InputFilenames.begin(), InputFilenames.end(),
|
|
dumpSymbolNamesFromFile);
|
|
|
|
if (HadError)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|