1 //===-- AuxVector.cpp -----------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "AuxVector.h" 10 AuxVector(const lldb_private::DataExtractor & data)11AuxVector::AuxVector(const lldb_private::DataExtractor &data) { 12 ParseAuxv(data); 13 } 14 ParseAuxv(const lldb_private::DataExtractor & data)15void AuxVector::ParseAuxv(const lldb_private::DataExtractor &data) { 16 lldb::offset_t offset = 0; 17 const size_t value_type_size = data.GetAddressByteSize() * 2; 18 while (data.ValidOffsetForDataOfSize(offset, value_type_size)) { 19 // We're not reading an address but an int that could be 32 or 64 bit 20 // depending on the address size, which is what GetAddress does. 21 const uint64_t type = data.GetAddress(&offset); 22 const uint64_t value = data.GetAddress(&offset); 23 if (type == AUXV_AT_NULL) 24 break; 25 if (type == AUXV_AT_IGNORE) 26 continue; 27 28 m_auxv_entries[type] = value; 29 } 30 } 31 32 llvm::Optional<uint64_t> GetAuxValue(enum EntryType entry_type) const33AuxVector::GetAuxValue(enum EntryType entry_type) const { 34 auto it = m_auxv_entries.find(static_cast<uint64_t>(entry_type)); 35 if (it != m_auxv_entries.end()) 36 return it->second; 37 return llvm::None; 38 } 39 DumpToLog(lldb_private::Log * log) const40void AuxVector::DumpToLog(lldb_private::Log *log) const { 41 if (!log) 42 return; 43 44 log->PutCString("AuxVector: "); 45 for (auto entry : m_auxv_entries) { 46 LLDB_LOGF(log, " %s [%" PRIu64 "]: %" PRIx64, 47 GetEntryName(static_cast<EntryType>(entry.first)), entry.first, 48 entry.second); 49 } 50 } 51 GetEntryName(EntryType type) const52const char *AuxVector::GetEntryName(EntryType type) const { 53 const char *name = "AT_???"; 54 55 #define ENTRY_NAME(_type) \ 56 _type: \ 57 name = &#_type[5] 58 switch (type) { 59 case ENTRY_NAME(AUXV_AT_NULL); break; 60 case ENTRY_NAME(AUXV_AT_IGNORE); break; 61 case ENTRY_NAME(AUXV_AT_EXECFD); break; 62 case ENTRY_NAME(AUXV_AT_PHDR); break; 63 case ENTRY_NAME(AUXV_AT_PHENT); break; 64 case ENTRY_NAME(AUXV_AT_PHNUM); break; 65 case ENTRY_NAME(AUXV_AT_PAGESZ); break; 66 case ENTRY_NAME(AUXV_AT_BASE); break; 67 case ENTRY_NAME(AUXV_AT_FLAGS); break; 68 case ENTRY_NAME(AUXV_AT_ENTRY); break; 69 case ENTRY_NAME(AUXV_AT_NOTELF); break; 70 case ENTRY_NAME(AUXV_AT_UID); break; 71 case ENTRY_NAME(AUXV_AT_EUID); break; 72 case ENTRY_NAME(AUXV_AT_GID); break; 73 case ENTRY_NAME(AUXV_AT_EGID); break; 74 case ENTRY_NAME(AUXV_AT_CLKTCK); break; 75 case ENTRY_NAME(AUXV_AT_PLATFORM); break; 76 case ENTRY_NAME(AUXV_AT_HWCAP); break; 77 case ENTRY_NAME(AUXV_AT_FPUCW); break; 78 case ENTRY_NAME(AUXV_AT_DCACHEBSIZE); break; 79 case ENTRY_NAME(AUXV_AT_ICACHEBSIZE); break; 80 case ENTRY_NAME(AUXV_AT_UCACHEBSIZE); break; 81 case ENTRY_NAME(AUXV_AT_IGNOREPPC); break; 82 case ENTRY_NAME(AUXV_AT_SECURE); break; 83 case ENTRY_NAME(AUXV_AT_BASE_PLATFORM); break; 84 case ENTRY_NAME(AUXV_AT_RANDOM); break; 85 case ENTRY_NAME(AUXV_AT_EXECFN); break; 86 case ENTRY_NAME(AUXV_AT_SYSINFO); break; 87 case ENTRY_NAME(AUXV_AT_SYSINFO_EHDR); break; 88 case ENTRY_NAME(AUXV_AT_L1I_CACHESHAPE); break; 89 case ENTRY_NAME(AUXV_AT_L1D_CACHESHAPE); break; 90 case ENTRY_NAME(AUXV_AT_L2_CACHESHAPE); break; 91 case ENTRY_NAME(AUXV_AT_L3_CACHESHAPE); break; 92 } 93 #undef ENTRY_NAME 94 95 return name; 96 } 97