1 //===- System.inc ---------------------------------------------------------===// 2 // 3 // The MCLinker Project 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 #include <cstring> 10 #include <sys/types.h> 11 #include <sys/stat.h> 12 #include <sys/utsname.h> 13 #include <ctype.h> 14 #include <cstdlib> 15 #include <fcntl.h> 16 #include <unistd.h> 17 18 #include <llvm/ADT/StringRef.h> 19 20 namespace mcld{ 21 namespace sys{ 22 23 char *strerror(int errnum) 24 { 25 return std::strerror(errnum); 26 } 27 28 static std::string getOSVersion() 29 { 30 struct utsname info; 31 32 if (uname(&info)) 33 return ""; 34 35 return info.release; 36 } 37 38 std::string getDefaultTargetTriple() 39 { 40 llvm::StringRef TargetTripleString(MCLD_DEFAULT_TARGET_TRIPLE); 41 std::pair<llvm::StringRef, llvm::StringRef> ArchSplit = TargetTripleString.split('-'); 42 43 // Normalize the arch, since the target triple may not actually match the target. 44 std::string Arch = ArchSplit.first; 45 46 std::string Triple(Arch); 47 Triple += '-'; 48 Triple += ArchSplit.second; 49 50 // Force i<N>86 to i386. 51 if (Triple[0] == 'i' && isdigit(Triple[1]) && 52 Triple[2] == '8' && Triple[3] == '6') 53 Triple[1] = '3'; 54 55 // On darwin, we want to update the version to match that of the 56 // target. 57 std::string::size_type DarwinDashIdx = Triple.find("-darwin"); 58 if (DarwinDashIdx != std::string::npos) { 59 Triple.resize(DarwinDashIdx + strlen("-darwin")); 60 Triple += getOSVersion(); 61 } 62 63 return Triple; 64 } 65 66 int GetPageSize() 67 { 68 return getpagesize(); 69 } 70 71 /// random - generate a random number. 72 long GetRandomNum() 73 { 74 return ::random(); 75 } 76 77 /// srandom - set the initial seed value for future calls to random(). 78 void SetRandomSeed(unsigned pSeed) 79 { 80 ::srandom(pSeed); 81 } 82 83 } // namespace of sys 84 } // namespace of mcld 85 86
