1 //===-- AuxVector.h ---------------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef liblldb_AuxVector_H_ 11 #define liblldb_AuxVector_H_ 12 13 // C Includes 14 // C++ Includes 15 #include <vector> 16 17 // Other libraries and framework includes 18 #include "lldb/lldb-forward.h" 19 20 namespace lldb_private { 21 class DataExtractor; 22 } 23 24 /// @class AuxVector 25 /// @brief Represents a processes auxiliary vector. 26 /// 27 /// When a process is loaded on Linux a vector of values is placed onto the 28 /// stack communicating operating system specific information. On construction 29 /// this class locates and parses this information and provides a simple 30 /// read-only interface to the entries found. 31 class AuxVector { 32 33 public: 34 AuxVector(lldb_private::Process *process); 35 36 struct Entry { 37 uint64_t type; 38 uint64_t value; 39 40 Entry() : type(0), value(0) { } 41 }; 42 43 /// Constants describing the type of entry. 44 /// On Linux, running "LD_SHOW_AUXV=1 ./executable" will spew AUX information. 45 enum EntryType { 46 AT_NULL = 0, ///< End of auxv. 47 AT_IGNORE = 1, ///< Ignore entry. 48 AT_EXECFD = 2, ///< File descriptor of program. 49 AT_PHDR = 3, ///< Program headers. 50 AT_PHENT = 4, ///< Size of program header. 51 AT_PHNUM = 5, ///< Number of program headers. 52 AT_PAGESZ = 6, ///< Page size. 53 AT_BASE = 7, ///< Interpreter base address. 54 AT_FLAGS = 8, ///< Flags. 55 AT_ENTRY = 9, ///< Program entry point. 56 AT_NOTELF = 10, ///< Set if program is not an ELF. 57 AT_UID = 11, ///< UID. 58 AT_EUID = 12, ///< Effective UID. 59 AT_GID = 13, ///< GID. 60 AT_EGID = 14, ///< Effective GID. 61 AT_CLKTCK = 17, ///< Clock frequency (e.g. times(2)). 62 AT_PLATFORM = 15, ///< String identifying platform. 63 AT_HWCAP = 16, ///< Machine dependent hints about processor capabilities. 64 AT_FPUCW = 18, ///< Used FPU control word. 65 AT_DCACHEBSIZE = 19, ///< Data cache block size. 66 AT_ICACHEBSIZE = 20, ///< Instruction cache block size. 67 AT_UCACHEBSIZE = 21, ///< Unified cache block size. 68 AT_IGNOREPPC = 22, ///< Entry should be ignored. 69 AT_SECURE = 23, ///< Boolean, was exec setuid-like? 70 AT_BASE_PLATFORM = 24, ///< String identifying real platforms. 71 AT_RANDOM = 25, ///< Address of 16 random bytes. 72 AT_EXECFN = 31, ///< Filename of executable. 73 AT_SYSINFO = 32, ///< Pointer to the global system page used for system calls and other nice things. 74 AT_SYSINFO_EHDR = 33, 75 AT_L1I_CACHESHAPE = 34, ///< Shapes of the caches. 76 AT_L1D_CACHESHAPE = 35, 77 AT_L2_CACHESHAPE = 36, 78 AT_L3_CACHESHAPE = 37, 79 }; 80 81 private: 82 typedef std::vector<Entry> EntryVector; 83 84 public: 85 typedef EntryVector::const_iterator iterator; 86 87 iterator begin() const { return m_auxv.begin(); } 88 iterator end() const { return m_auxv.end(); } 89 90 iterator 91 FindEntry(EntryType type) const; 92 93 static const char * 94 GetEntryName(const Entry &entry) { 95 return GetEntryName(static_cast<EntryType>(entry.type)); 96 } 97 98 static const char * 99 GetEntryName(EntryType type); 100 101 void 102 DumpToLog(lldb_private::Log *log) const; 103 104 private: 105 lldb_private::Process *m_process; 106 EntryVector m_auxv; 107 108 lldb::DataBufferSP 109 GetAuxvData(); 110 111 void 112 ParseAuxv(lldb_private::DataExtractor &data); 113 }; 114 115 #endif 116
