[obj2yaml][yaml2obj] Support for MachO bind opcodes

This adds support for YAML round tripping dyld info bind opcodes. Bind opcodes can have signed or unsigned LEB128 data, and they can have symbols associated with them.

llvm-svn: 270901

1 files changed, 17 insertions, 0 deletions

diff --git a/llvm/tools/yaml2obj/yaml2macho.cpp b/llvm/tools/yaml2obj/yaml2macho.cpp
index d24a08c6e54..a1f5dda9d9d 100644
--- a/llvm/tools/yaml2obj/yaml2macho.cpp
+++ b/llvm/tools/yaml2obj/yaml2macho.cpp
@@ -289,6 +289,23 @@ Error MachOWriter::writeLinkEditData(raw_ostream &OS) {
     }
   }
 
+  ZeroToOffset(OS, DyldInfoOnlyCmd->bind_off);
+
+  for (auto Opcode : LinkEdit.BindOpcodes) {
+    uint8_t OpByte = Opcode.Opcode | Opcode.Imm;
+    OS.write(reinterpret_cast<char *>(&OpByte), 1);
+    for (auto Data : Opcode.ULEBExtraData) {
+      encodeULEB128(Data, OS);
+    }
+    for (auto Data : Opcode.SLEBExtraData) {
+      encodeSLEB128(Data, OS);
+    }
+    if(!Opcode.Symbol.empty()) {
+      OS.write(Opcode.Symbol.data(), Opcode.Symbol.size());
+      OS.write("\0", 1);
+    }
+  }
+
   // Fill to the end of the string table
   ZeroToOffset(OS, SymtabCmd->stroff + SymtabCmd->strsize);