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//===-- AuxVector.cpp -------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "AuxVector.h"
#include "lldb/Target/Process.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/DataExtractor.h"
#include "lldb/Utility/Log.h"
using namespace lldb;
using namespace lldb_private;
static bool GetMaxU64(DataExtractor &data, lldb::offset_t *offset_ptr,
uint64_t *value, unsigned int byte_size) {
lldb::offset_t saved_offset = *offset_ptr;
*value = data.GetMaxU64(offset_ptr, byte_size);
return *offset_ptr != saved_offset;
}
static bool ParseAuxvEntry(DataExtractor &data, AuxVector::Entry &entry,
lldb::offset_t *offset_ptr, unsigned int byte_size) {
if (!GetMaxU64(data, offset_ptr, &entry.type, byte_size))
return false;
if (!GetMaxU64(data, offset_ptr, &entry.value, byte_size))
return false;
return true;
}
DataBufferSP AuxVector::GetAuxvData() {
if (m_process)
return m_process->GetAuxvData();
else
return DataBufferSP();
}
void AuxVector::ParseAuxv(DataExtractor &data) {
const unsigned int byte_size = m_process->GetAddressByteSize();
lldb::offset_t offset = 0;
for (;;) {
Entry entry;
if (!ParseAuxvEntry(data, entry, &offset, byte_size))
break;
if (entry.type == AUXV_AT_NULL)
break;
if (entry.type == AUXV_AT_IGNORE)
continue;
m_auxv.push_back(entry);
}
}
AuxVector::AuxVector(Process *process) : m_process(process) {
DataExtractor data;
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
data.SetData(GetAuxvData());
data.SetByteOrder(m_process->GetByteOrder());
data.SetAddressByteSize(m_process->GetAddressByteSize());
ParseAuxv(data);
if (log)
DumpToLog(log);
}
AuxVector::iterator AuxVector::FindEntry(EntryType type) const {
for (iterator I = begin(); I != end(); ++I) {
if (I->type == static_cast<uint64_t>(type))
return I;
}
return end();
}
void AuxVector::DumpToLog(Log *log) const {
if (!log)
return;
log->PutCString("AuxVector: ");
for (iterator I = begin(); I != end(); ++I) {
log->Printf(" %s [%" PRIu64 "]: %" PRIx64, GetEntryName(*I), I->type,
I->value);
}
}
const char *AuxVector::GetEntryName(EntryType type) {
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;
}
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