AuxVector.cpp
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//===-- AuxVector.cpp -------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "AuxVector.h"
AuxVector::AuxVector(const lldb_private::DataExtractor &data) {
ParseAuxv(data);
}
void AuxVector::ParseAuxv(const lldb_private::DataExtractor &data) {
lldb::offset_t offset = 0;
const size_t value_type_size = data.GetAddressByteSize() * 2;
while (data.ValidOffsetForDataOfSize(offset, value_type_size)) {
// We're not reading an address but an int that could be 32 or 64 bit
// depending on the address size, which is what GetAddress does.
const uint64_t type = data.GetAddress(&offset);
const uint64_t value = data.GetAddress(&offset);
if (type == AUXV_AT_NULL)
break;
if (type == AUXV_AT_IGNORE)
continue;
m_auxv_entries[type] = value;
}
}
llvm::Optional<uint64_t>
AuxVector::GetAuxValue(enum EntryType entry_type) const {
auto it = m_auxv_entries.find(static_cast<uint64_t>(entry_type));
if (it != m_auxv_entries.end())
return it->second;
return llvm::None;
}
void AuxVector::DumpToLog(lldb_private::Log *log) const {
if (!log)
return;
log->PutCString("AuxVector: ");
for (auto entry : m_auxv_entries) {
LLDB_LOGF(log, " %s [%" PRIu64 "]: %" PRIx64,
GetEntryName(static_cast<EntryType>(entry.first)), entry.first,
entry.second);
}
}
const char *AuxVector::GetEntryName(EntryType type) const {
const char *name = "AT_???";
#define ENTRY_NAME(_type) \
_type: \
name = &#_type[5]
switch (type) {
case ENTRY_NAME(AUXV_AT_NULL); break;
case ENTRY_NAME(AUXV_AT_IGNORE); break;
case ENTRY_NAME(AUXV_AT_EXECFD); break;
case ENTRY_NAME(AUXV_AT_PHDR); break;
case ENTRY_NAME(AUXV_AT_PHENT); break;
case ENTRY_NAME(AUXV_AT_PHNUM); break;
case ENTRY_NAME(AUXV_AT_PAGESZ); break;
case ENTRY_NAME(AUXV_AT_BASE); break;
case ENTRY_NAME(AUXV_AT_FLAGS); break;
case ENTRY_NAME(AUXV_AT_ENTRY); break;
case ENTRY_NAME(AUXV_AT_NOTELF); break;
case ENTRY_NAME(AUXV_AT_UID); break;
case ENTRY_NAME(AUXV_AT_EUID); break;
case ENTRY_NAME(AUXV_AT_GID); break;
case ENTRY_NAME(AUXV_AT_EGID); break;
case ENTRY_NAME(AUXV_AT_CLKTCK); break;
case ENTRY_NAME(AUXV_AT_PLATFORM); break;
case ENTRY_NAME(AUXV_AT_HWCAP); break;
case ENTRY_NAME(AUXV_AT_FPUCW); break;
case ENTRY_NAME(AUXV_AT_DCACHEBSIZE); break;
case ENTRY_NAME(AUXV_AT_ICACHEBSIZE); break;
case ENTRY_NAME(AUXV_AT_UCACHEBSIZE); break;
case ENTRY_NAME(AUXV_AT_IGNOREPPC); break;
case ENTRY_NAME(AUXV_AT_SECURE); break;
case ENTRY_NAME(AUXV_AT_BASE_PLATFORM); break;
case ENTRY_NAME(AUXV_AT_RANDOM); break;
case ENTRY_NAME(AUXV_AT_EXECFN); break;
case ENTRY_NAME(AUXV_AT_SYSINFO); break;
case ENTRY_NAME(AUXV_AT_SYSINFO_EHDR); break;
case ENTRY_NAME(AUXV_AT_L1I_CACHESHAPE); break;
case ENTRY_NAME(AUXV_AT_L1D_CACHESHAPE); break;
case ENTRY_NAME(AUXV_AT_L2_CACHESHAPE); break;
case ENTRY_NAME(AUXV_AT_L3_CACHESHAPE); break;
}
#undef ENTRY_NAME
return name;
}