1 files changed, 153 insertions, 0 deletions
diff --git a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp
new file mode 100644
index 00000000000..9311e70ca33
--- /dev/null
+++ b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp
@@ -0,0 +1,153 @@
+//===-- AuxVector.cpp -------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// C Includes
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+// C++ Includes
+// Other libraries and framework includes
+#include "lldb/Core/DataBufferHeap.h"
+#include "lldb/Core/DataExtractor.h"
+#include "lldb/Core/Log.h"
+#include "lldb/Target/Process.h"
+
+#include "AuxVector.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+static bool
+GetMaxU64(DataExtractor &data,
+          uint32_t *offset, uint64_t *value, unsigned int byte_size)
+{
+    uint32_t saved_offset = *offset;
+    *value = data.GetMaxU64(offset, byte_size);
+    return *offset != saved_offset;
+}
+
+static bool
+ParseAuxvEntry(DataExtractor &data, AuxVector::Entry &entry, 
+               uint32_t *offset, unsigned int byte_size)
+{
+    if (!GetMaxU64(data, offset, &entry.type, byte_size))
+        return false;
+
+    if (!GetMaxU64(data, offset, &entry.value, byte_size))
+        return false;
+
+    return true;
+}
+
+DataBufferSP
+AuxVector::GetAuxvData()
+{
+
+    return lldb_private::Host::GetAuxvData(m_process);
+}
+
+void
+AuxVector::ParseAuxv(DataExtractor &data)
+{
+    const unsigned int byte_size  = m_process->GetAddressByteSize();
+    uint32_t offset = 0;
+
+    for (;;) 
+    {
+        Entry entry;
+
+        if (!ParseAuxvEntry(data, entry, &offset, byte_size))
+            break;
+
+        if (entry.type == AT_NULL)
+            break;
+
+        if (entry.type == AT_IGNORE)
+            continue;
+
+        m_auxv.push_back(entry);
+    }
+}
+
+AuxVector::AuxVector(Process *process)
+    : m_process(process)
+{
+    DataExtractor data;
+    LogSP 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(LogSP log) const
+{
+    if (!log)
+        return;
+
+    log->PutCString("AuxVector: ");
+    for (iterator I = begin(); I != end(); ++I)
+    {
+        log->Printf("   %s [%d]: %lx", GetEntryName(*I), I->type, I->value);
+    }
+}
+
+const char *
+AuxVector::GetEntryName(EntryType type)
+{
+    const char *name;
+
+#define ENTRY_NAME(_type) _type: name = #_type
+    switch (type) 
+    {
+    default:
+        name = "unkown";
+        break;
+
+    case ENTRY_NAME(AT_NULL);   break;
+    case ENTRY_NAME(AT_IGNORE); break;
+    case ENTRY_NAME(AT_EXECFD); break;
+    case ENTRY_NAME(AT_PHDR);   break;
+    case ENTRY_NAME(AT_PHENT);  break;
+    case ENTRY_NAME(AT_PHNUM);  break;
+    case ENTRY_NAME(AT_PAGESZ); break;
+    case ENTRY_NAME(AT_BASE);   break;
+    case ENTRY_NAME(AT_FLAGS);  break;
+    case ENTRY_NAME(AT_ENTRY);  break;
+    case ENTRY_NAME(AT_NOTELF); break;
+    case ENTRY_NAME(AT_UID);    break;
+    case ENTRY_NAME(AT_EUID);   break;
+    case ENTRY_NAME(AT_GID);    break;
+    case ENTRY_NAME(AT_EGID);   break;
+    case ENTRY_NAME(AT_CLKTCK); break;
+    }
+#undef ENTRY_NAME
+
+    return name;
+}
+