1*0b57cec5SDimitry Andric //===-- AuxVector.cpp -----------------------------------------------------===//
2*0b57cec5SDimitry Andric //
3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6*0b57cec5SDimitry Andric //
7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
8*0b57cec5SDimitry Andric 
9*0b57cec5SDimitry Andric #include "AuxVector.h"
10*0b57cec5SDimitry Andric #include <optional>
11*0b57cec5SDimitry Andric 
AuxVector(const lldb_private::DataExtractor & data)12*0b57cec5SDimitry Andric AuxVector::AuxVector(const lldb_private::DataExtractor &data) {
13*0b57cec5SDimitry Andric   ParseAuxv(data);
14*0b57cec5SDimitry Andric }
15*0b57cec5SDimitry Andric 
ParseAuxv(const lldb_private::DataExtractor & data)16*0b57cec5SDimitry Andric void AuxVector::ParseAuxv(const lldb_private::DataExtractor &data) {
17*0b57cec5SDimitry Andric   lldb::offset_t offset = 0;
18*0b57cec5SDimitry Andric   const size_t value_type_size = data.GetAddressByteSize() * 2;
19*0b57cec5SDimitry Andric   while (data.ValidOffsetForDataOfSize(offset, value_type_size)) {
20*0b57cec5SDimitry Andric     // We're not reading an address but an int that could be 32 or 64 bit
21*0b57cec5SDimitry Andric     // depending on the address size, which is what GetAddress does.
22*0b57cec5SDimitry Andric     const uint64_t type = data.GetAddress(&offset);
23*0b57cec5SDimitry Andric     const uint64_t value = data.GetAddress(&offset);
24*0b57cec5SDimitry Andric     if (type == AUXV_AT_NULL)
25*0b57cec5SDimitry Andric       break;
26*0b57cec5SDimitry Andric     if (type == AUXV_AT_IGNORE)
27*0b57cec5SDimitry Andric       continue;
28*0b57cec5SDimitry Andric 
29*0b57cec5SDimitry Andric     m_auxv_entries[type] = value;
30*0b57cec5SDimitry Andric   }
31*0b57cec5SDimitry Andric }
32*0b57cec5SDimitry Andric 
33*0b57cec5SDimitry Andric std::optional<uint64_t>
GetAuxValue(enum EntryType entry_type) const34*0b57cec5SDimitry Andric AuxVector::GetAuxValue(enum EntryType entry_type) const {
35*0b57cec5SDimitry Andric   auto it = m_auxv_entries.find(static_cast<uint64_t>(entry_type));
36*0b57cec5SDimitry Andric   if (it != m_auxv_entries.end())
37*0b57cec5SDimitry Andric     return it->second;
38*0b57cec5SDimitry Andric   return std::nullopt;
39*0b57cec5SDimitry Andric }
40*0b57cec5SDimitry Andric 
DumpToLog(lldb_private::Log * log) const41*0b57cec5SDimitry Andric void AuxVector::DumpToLog(lldb_private::Log *log) const {
42*0b57cec5SDimitry Andric   if (!log)
43*0b57cec5SDimitry Andric     return;
44*0b57cec5SDimitry Andric 
45*0b57cec5SDimitry Andric   log->PutCString("AuxVector: ");
46*0b57cec5SDimitry Andric   for (auto entry : m_auxv_entries) {
47*0b57cec5SDimitry Andric     LLDB_LOGF(log, "   %s [%" PRIu64 "]: %" PRIx64,
48*0b57cec5SDimitry Andric               GetEntryName(static_cast<EntryType>(entry.first)), entry.first,
49*0b57cec5SDimitry Andric               entry.second);
50*0b57cec5SDimitry Andric   }
51*0b57cec5SDimitry Andric }
52*0b57cec5SDimitry Andric 
GetEntryName(EntryType type) const53*0b57cec5SDimitry Andric const char *AuxVector::GetEntryName(EntryType type) const {
54*0b57cec5SDimitry Andric   const char *name = "AT_???";
55*0b57cec5SDimitry Andric 
56*0b57cec5SDimitry Andric #define ENTRY_NAME(_type)                                                      \
57*0b57cec5SDimitry Andric   _type:                                                                       \
58*0b57cec5SDimitry Andric   name = &#_type[5]
59*0b57cec5SDimitry Andric   switch (type) {
60*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_NULL);           break;
61*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_IGNORE);         break;
62*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_EXECFD);         break;
63*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_PHDR);           break;
64*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_PHENT);          break;
65*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_PHNUM);          break;
66*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_PAGESZ);         break;
67*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_BASE);           break;
68*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_FLAGS);          break;
69*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_ENTRY);          break;
70*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_NOTELF);         break;
71*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_UID);            break;
72*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_EUID);           break;
73*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_GID);            break;
74*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_EGID);           break;
75*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_CLKTCK);         break;
76*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_PLATFORM);       break;
77*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_HWCAP);          break;
78*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_FPUCW);          break;
79*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_DCACHEBSIZE);    break;
80*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_ICACHEBSIZE);    break;
81*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_UCACHEBSIZE);    break;
82*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_IGNOREPPC);      break;
83*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_SECURE);         break;
84*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_BASE_PLATFORM);  break;
85*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_RANDOM);         break;
86*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_HWCAP2);         break;
87*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_EXECFN);         break;
88*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_SYSINFO);        break;
89*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_SYSINFO_EHDR);   break;
90*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_L1I_CACHESHAPE); break;
91*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_L1D_CACHESHAPE); break;
92*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_L2_CACHESHAPE);  break;
93*0b57cec5SDimitry Andric     case ENTRY_NAME(AUXV_AT_L3_CACHESHAPE);  break;
94*0b57cec5SDimitry Andric     }
95*0b57cec5SDimitry Andric #undef ENTRY_NAME
96*0b57cec5SDimitry Andric 
97     return name;
98 }
99