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 #include <vector> 14 15 #include "lldb/lldb-forward.h" 16 17 namespace lldb_private { 18 class DataExtractor; 19 } 20 21 /// @class AuxVector 22 /// Represents a processes auxiliary vector. 23 /// 24 /// When a process is loaded on Linux a vector of values is placed onto the 25 /// stack communicating operating system specific information. On 26 /// construction this class locates and parses this information and provides a 27 /// simple read-only interface to the entries found. 28 class AuxVector { 29 30 public: 31 AuxVector(lldb_private::Process *process); 32 33 struct Entry { 34 uint64_t type; 35 uint64_t value; 36 EntryEntry37 Entry() : type(0), value(0) {} 38 }; 39 40 /// Constants describing the type of entry. 41 /// On Linux, running "LD_SHOW_AUXV=1 ./executable" will spew AUX 42 /// information. Added AUXV prefix to avoid potential conflicts with system- 43 /// defined macros 44 enum EntryType { 45 AUXV_AT_NULL = 0, ///< End of auxv. 46 AUXV_AT_IGNORE = 1, ///< Ignore entry. 47 AUXV_AT_EXECFD = 2, ///< File descriptor of program. 48 AUXV_AT_PHDR = 3, ///< Program headers. 49 AUXV_AT_PHENT = 4, ///< Size of program header. 50 AUXV_AT_PHNUM = 5, ///< Number of program headers. 51 AUXV_AT_PAGESZ = 6, ///< Page size. 52 AUXV_AT_BASE = 7, ///< Interpreter base address. 53 AUXV_AT_FLAGS = 8, ///< Flags. 54 AUXV_AT_ENTRY = 9, ///< Program entry point. 55 AUXV_AT_NOTELF = 10, ///< Set if program is not an ELF. 56 AUXV_AT_UID = 11, ///< UID. 57 AUXV_AT_EUID = 12, ///< Effective UID. 58 AUXV_AT_GID = 13, ///< GID. 59 AUXV_AT_EGID = 14, ///< Effective GID. 60 AUXV_AT_CLKTCK = 17, ///< Clock frequency (e.g. times(2)). 61 AUXV_AT_PLATFORM = 15, ///< String identifying platform. 62 AUXV_AT_HWCAP = 16, ///< Machine dependent hints about processor capabilities. 63 AUXV_AT_FPUCW = 18, ///< Used FPU control word. 64 AUXV_AT_DCACHEBSIZE = 19, ///< Data cache block size. 65 AUXV_AT_ICACHEBSIZE = 20, ///< Instruction cache block size. 66 AUXV_AT_UCACHEBSIZE = 21, ///< Unified cache block size. 67 AUXV_AT_IGNOREPPC = 22, ///< Entry should be ignored. 68 AUXV_AT_SECURE = 23, ///< Boolean, was exec setuid-like? 69 AUXV_AT_BASE_PLATFORM = 24, ///< String identifying real platforms. 70 AUXV_AT_RANDOM = 25, ///< Address of 16 random bytes. 71 AUXV_AT_EXECFN = 31, ///< Filename of executable. 72 AUXV_AT_SYSINFO = 32, ///< Pointer to the global system page used for system 73 ///calls and other nice things. 74 AUXV_AT_SYSINFO_EHDR = 33, 75 AUXV_AT_L1I_CACHESHAPE = 34, ///< Shapes of the caches. 76 AUXV_AT_L1D_CACHESHAPE = 35, 77 AUXV_AT_L2_CACHESHAPE = 36, 78 AUXV_AT_L3_CACHESHAPE = 37, 79 }; 80 81 private: 82 typedef std::vector<Entry> EntryVector; 83 84 public: 85 typedef EntryVector::const_iterator iterator; 86 begin()87 iterator begin() const { return m_auxv.begin(); } end()88 iterator end() const { return m_auxv.end(); } 89 90 iterator FindEntry(EntryType type) const; 91 GetEntryName(const Entry & entry)92 static const char *GetEntryName(const Entry &entry) { 93 return GetEntryName(static_cast<EntryType>(entry.type)); 94 } 95 96 static const char *GetEntryName(EntryType type); 97 98 void DumpToLog(lldb_private::Log *log) const; 99 100 private: 101 lldb_private::Process *m_process; 102 EntryVector m_auxv; 103 104 lldb::DataBufferSP GetAuxvData(); 105 106 void ParseAuxv(lldb_private::DataExtractor &data); 107 }; 108 109 #endif 110