102 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9#include "AuxVector.h"10#include <optional>11 12AuxVector::AuxVector(const lldb_private::DataExtractor &data) {13 ParseAuxv(data);14}15 16void AuxVector::ParseAuxv(const lldb_private::DataExtractor &data) {17 lldb::offset_t offset = 0;18 const size_t value_type_size = data.GetAddressByteSize() * 2;19 while (data.ValidOffsetForDataOfSize(offset, value_type_size)) {20 // We're not reading an address but an int that could be 32 or 64 bit21 // depending on the address size, which is what GetAddress does.22 const uint64_t type = data.GetAddress(&offset);23 const uint64_t value = data.GetAddress(&offset);24 if (type == AUXV_AT_NULL)25 break;26 if (type == AUXV_AT_IGNORE)27 continue;28 29 m_auxv_entries[type] = value;30 }31}32 33std::optional<uint64_t>34AuxVector::GetAuxValue(enum EntryType entry_type) const {35 auto it = m_auxv_entries.find(static_cast<uint64_t>(entry_type));36 if (it != m_auxv_entries.end())37 return it->second;38 return std::nullopt;39}40 41void AuxVector::DumpToLog(lldb_private::Log *log) const {42 if (!log)43 return;44 45 log->PutCString("AuxVector: ");46 for (auto entry : m_auxv_entries) {47 LLDB_LOGF(log, " %s [%" PRIu64 "]: %" PRIx64,48 GetEntryName(static_cast<EntryType>(entry.first)), entry.first,49 entry.second);50 }51}52 53const char *AuxVector::GetEntryName(EntryType type) const {54 const char *name = "AT_???";55 56#define ENTRY_NAME(_type) \57 _type: \58 name = &#_type[5]59 switch (type) {60 case ENTRY_NAME(AUXV_AT_NULL); break;61 case ENTRY_NAME(AUXV_AT_IGNORE); break;62 case ENTRY_NAME(AUXV_AT_EXECFD); break;63 case ENTRY_NAME(AUXV_AT_PHDR); break;64 case ENTRY_NAME(AUXV_AT_PHENT); break;65 case ENTRY_NAME(AUXV_AT_PHNUM); break;66 case ENTRY_NAME(AUXV_AT_PAGESZ); break;67 case ENTRY_NAME(AUXV_AT_BASE); break;68 case ENTRY_NAME(AUXV_AT_FLAGS); break;69 case ENTRY_NAME(AUXV_AT_ENTRY); break;70 case ENTRY_NAME(AUXV_AT_NOTELF); break;71 case ENTRY_NAME(AUXV_AT_UID); break;72 case ENTRY_NAME(AUXV_AT_EUID); break;73 case ENTRY_NAME(AUXV_AT_GID); break;74 case ENTRY_NAME(AUXV_AT_EGID); break;75 case ENTRY_NAME(AUXV_AT_CLKTCK); break;76 case ENTRY_NAME(AUXV_AT_PLATFORM); break;77 case ENTRY_NAME(AUXV_AT_HWCAP); break;78 case ENTRY_NAME(AUXV_AT_FPUCW); break;79 case ENTRY_NAME(AUXV_AT_DCACHEBSIZE); break;80 case ENTRY_NAME(AUXV_AT_ICACHEBSIZE); break;81 case ENTRY_NAME(AUXV_AT_UCACHEBSIZE); break;82 case ENTRY_NAME(AUXV_AT_IGNOREPPC); break;83 case ENTRY_NAME(AUXV_AT_SECURE); break;84 case ENTRY_NAME(AUXV_AT_BASE_PLATFORM); break;85 case ENTRY_NAME(AUXV_AT_RANDOM); break;86 case ENTRY_NAME(AUXV_AT_HWCAP2); break;87 case ENTRY_NAME(AUXV_AT_HWCAP3); break;88 case ENTRY_NAME(AUXV_AT_EXECFN); break;89 case ENTRY_NAME(AUXV_AT_SYSINFO); break;90 case ENTRY_NAME(AUXV_AT_SYSINFO_EHDR); break;91 case ENTRY_NAME(AUXV_AT_L1I_CACHESHAPE); break;92 case ENTRY_NAME(AUXV_AT_L1D_CACHESHAPE); break;93 case ENTRY_NAME(AUXV_AT_L2_CACHESHAPE); break;94 case ENTRY_NAME(AUXV_AT_L3_CACHESHAPE); break;95 case ENTRY_NAME(AUXV_FREEBSD_AT_HWCAP3); break;96 case ENTRY_NAME(AUXV_FREEBSD_AT_HWCAP4); break;97 }98#undef ENTRY_NAME99 100 return name;101}102