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Handle OpenVMS ELF notes, as the only ones found using 64-bit fields.

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Natalia Portillo
2018-03-15 10:59:41 +00:00
parent 7c9d288fcb
commit a6d5abe8f1
1 changed files with 31 additions and 11 deletions
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42
libexeinfo/ELF/ELF.cs
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@@ -247,7 +247,7 @@ namespace libexeinfo
BaseStream.Position = (long)Header.e_shoff;
buffer = new byte[Header.e_shentsize];
sections = new Elf64_Shdr[Header.e_shnum];
// Read section 0, aka "the NULL section"
BaseStream.Read(buffer, 0, buffer.Length);
switch(Header.ei_class)
@@ -382,8 +382,10 @@ namespace libexeinfo
buffer = new byte[sections[i].sh_size];
BaseStream.Read(buffer, 0, buffer.Length);
if(sectionNames[i] == ".interp" || sectionNames[i] == ".dynstr" || sectionNames[i] == ".comment" ||
sectionNames[i] == ".strtab" || sectionNames[i] == ".stab.indexstr")
if(sectionNames[i] == ".interp" || sectionNames[i] == ".dynstr" ||
sectionNames[i] == ".comment" ||
sectionNames[i] == ".strtab" || sectionNames[i] == ".stab.indexstr" ||
sectionNames[i] == ".debug_str")
{
strStart = 0;
len = 0;
@@ -426,12 +428,31 @@ namespace libexeinfo
else if(sectionNames[i].StartsWith(".note") && buffer.Length > 12)
{
pos = 0;
string noteAsString = Encoding.ASCII.GetString(buffer);
// Only IA-64 OpenVMS ELF uses 64-bit fields inside the note!
bool openVms = noteAsString.Contains("IPF/VMS");
while(pos < buffer.Length)
{
uint namesz = BitConverter.ToUInt32(buffer, pos);
uint descsz = BitConverter.ToUInt32(buffer, pos + 4);
uint notetype = BitConverter.ToUInt32(buffer, pos + 8);
pos += 12;
uint namesz;
uint descsz;
uint notetype;
if(openVms)
{
namesz = (uint)BitConverter.ToUInt64(buffer, pos);
descsz = (uint)BitConverter.ToUInt64(buffer, pos + 8);
notetype = (uint)BitConverter.ToUInt64(buffer, pos + 16);
pos += 24;
}
else
{
namesz = BitConverter.ToUInt32(buffer, pos);
descsz = BitConverter.ToUInt32(buffer, pos + 4);
notetype = BitConverter.ToUInt32(buffer, pos + 8);
pos += 12;
}
if(IsBigEndian)
{
@@ -449,15 +470,14 @@ namespace libexeinfo
pos += (int)namesz;
pos += pos % 4 != 0 ? 4 - pos % 4 : 0;
pos += pos % (openVms ? 8 : 4) != 0 ? (openVms ? 8 : 4) - pos % (openVms ? 8 : 4) : 0;
Array.Copy(buffer, pos, note.contents, 0, descsz);
pos += (int)descsz;
pos += pos % 4 != 0 ? 4 - pos % 4 : 0;
pos += pos % (openVms ? 8 : 4) != 0 ? (openVms ? 8 : 4) - pos % (openVms ? 8 : 4) : 0;
string notename = note.type != 1 ? $"{sectionNames[i]}.{note.type}" : sectionNames[i];
if(!notes.ContainsKey(notename))
notes.Add(notename, note);
if(!notes.ContainsKey(notename)) notes.Add(notename, note);
}
}
}