private static boolean readArmAttributes(RandomAccessFile in, ElfData elf) throws IOException {
byte[] bytes = new byte[elf.sh_size];
in.seek(elf.sh_offset);
in.readFully(bytes);
// wrap bytes in a ByteBuffer to force endianess
ByteBuffer buffer = ByteBuffer.wrap(bytes);
buffer.order(elf.order);
// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0044e/IHI0044E_aaelf.pdf
// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0045d/IHI0045D_ABI_addenda.pdf
if (buffer.get() != 'A') // format-version
return false;
// sub-sections loop
while (buffer.remaining() > 0) {
int start_section = buffer.position();
int length = buffer.getInt();
String vendor = getString(buffer);
if (vendor.equals("aeabi")) {
// tags loop
while (buffer.position() < start_section + length) {
int start = buffer.position();
int tag = buffer.get();
int size = buffer.getInt();
// skip if not Tag_File, we don't care about others
if (tag != 1) {
buffer.position(start + size);
continue;
}
// attributes loop
while (buffer.position() < start + size) {
tag = getUleb128(buffer);
if (tag == 6) { // CPU_arch
int arch = getUleb128(buffer);
elf.att_arch = CPU_archs[arch];
} else if (tag == 27) { // ABI_HardFP_use
getUleb128(buffer);
elf.att_fpu = true;
} else {
// string for 4=CPU_raw_name / 5=CPU_name / 32=compatibility
// string for >32 && odd tags
// uleb128 for other
tag %= 128;
if (tag == 4 || tag == 5 || tag == 32 || (tag > 32 && (tag & 1) != 0))
getString(buffer);
else getUleb128(buffer);
}
}
}
break;
}
}
return true;
}