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-rw-r--r--lib/Object/MachOObject.cpp26
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/Object/MachOObject.cpp b/lib/Object/MachOObject.cpp
index 339b12043ae..9cdac8681dd 100644
--- a/lib/Object/MachOObject.cpp
+++ b/lib/Object/MachOObject.cpp
@@ -9,6 +9,7 @@
#include "llvm/Object/MachOObject.h"
#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/SwapByteOrder.h"
@@ -355,6 +356,31 @@ void MachOObject::ReadSymbol64TableEntry(uint64_t SymbolTableOffset,
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
}
+
+void MachOObject::ReadULEB128s(uint64_t Index,
+ SmallVectorImpl<uint64_t> &Out) const {
+ const char *ptr = Buffer->getBufferStart() + Index;
+ uint64_t data = 0;
+ uint64_t delta = 0;
+ uint32_t shift = 0;
+ while (true) {
+ assert(ptr < Buffer->getBufferEnd() && "index out of bounds");
+ assert(shift < 64 && "too big for uint64_t");
+
+ uint8_t byte = *ptr++;
+ delta |= ((byte & 0x7F) << shift);
+ shift += 7;
+ if (byte < 0x80) {
+ if (delta == 0)
+ break;
+ data += delta;
+ Out.push_back(data);
+ delta = 0;
+ shift = 0;
+ }
+ }
+}
+
/* ** */
// Object Dumping Facilities
void MachOObject::dump() const { print(dbgs()); dbgs() << '\n'; }