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https://github.com/c64scene-ar/llvm-6502.git
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8bb5fd17f9
Implement recognition of COFF, ELF and Mach-O object/shared lib files. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35650 91177308-0d34-0410-b5e6-96231b3b80d8
141 lines
3.7 KiB
C++
141 lines
3.7 KiB
C++
//===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Reid Spencer and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This header file implements the operating system Path concept.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/System/Path.h"
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#include "llvm/Config/config.h"
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#include <cassert>
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#include <ostream>
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using namespace llvm;
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using namespace sys;
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only TRULY operating system
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//=== independent code.
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//===----------------------------------------------------------------------===//
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std::ostream& llvm::operator<<(std::ostream &strm, const sys::Path &aPath) {
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strm << aPath.toString();
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return strm;
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}
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Path
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Path::GetLLVMConfigDir() {
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Path result;
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#ifdef LLVM_ETCDIR
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if (result.set(LLVM_ETCDIR))
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return result;
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#endif
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return GetLLVMDefaultConfigDir();
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}
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LLVMFileType
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sys::IdentifyFileType(const char*magic, unsigned length) {
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assert(magic && "Invalid magic number string");
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assert(length >=4 && "Invalid magic number length");
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switch (magic[0]) {
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case 'l':
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if (magic[1] == 'l' && magic[2] == 'v')
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if (magic[3] == 'c')
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return CompressedBytecode_FileType;
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else if (magic[3] == 'm')
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return Bytecode_FileType;
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break;
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case '!':
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if (length >= 8)
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if (memcmp(magic,"!<arch>\n",8) == 0)
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return Archive_FileType;
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break;
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case '\177':
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if (magic[1] == 'E' && magic[2] == 'L' && magic[3] == 'F')
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return ELF_FileType;
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break;
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case 0xCE:
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case 0xCF:
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// This is complicated by an overlap with Java class files.
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// See the Mach-O section in /usr/share/file/magic for details.
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if (magic[1] == char(0xFA) && magic[2] == char(0xED) &&
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magic[3] == char(0xFE))
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if (length >= 15)
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if (magic[15] == 1 || magic[15] == 3 || magic[15] == 6 ||
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magic[15] == 9)
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return Mach_O_FileType;
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break;
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case 0xF0: // PowerPC Windows
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case 0x83: // Alpha 32-bit
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case 0x84: // Alpha 64-bit
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case 0x66: // MPS R4000 Windows
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case 0x50: // mc68K
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case 0x4c: // 80386 Windows
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if (magic[1] == 0x01)
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return COFF_FileType;
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case 0x90: // PA-RISC Windows
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case 0x68: // mc68K Windows
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if (magic[1] == 0x02)
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return COFF_FileType;
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break;
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default:
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break;
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}
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return Unknown_FileType;
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}
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bool
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Path::isArchive() const {
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if (canRead())
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return hasMagicNumber("!<arch>\012");
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return false;
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}
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bool
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Path::isDynamicLibrary() const {
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if (canRead())
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return hasMagicNumber("\177ELF");
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return false;
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}
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Path
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Path::FindLibrary(std::string& name) {
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std::vector<sys::Path> LibPaths;
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GetSystemLibraryPaths(LibPaths);
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for (unsigned i = 0; i < LibPaths.size(); ++i) {
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sys::Path FullPath(LibPaths[i]);
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FullPath.appendComponent("lib" + name + LTDL_SHLIB_EXT);
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if (FullPath.isDynamicLibrary())
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return FullPath;
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FullPath.eraseSuffix();
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FullPath.appendSuffix("a");
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if (FullPath.isArchive())
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return FullPath;
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}
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return sys::Path();
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}
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std::string Path::GetDLLSuffix() {
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return LTDL_SHLIB_EXT;
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}
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// Include the truly platform-specific parts of this class.
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#if defined(LLVM_ON_UNIX)
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#include "Unix/Path.inc"
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#endif
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#if defined(LLVM_ON_WIN32)
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#include "Win32/Path.inc"
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#endif
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DEFINING_FILE_FOR(SystemPath)
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