1 //===-- llvm/MC/MCLinkerOptimizationHint.cpp ----- LOH handling -*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/MC/MCLinkerOptimizationHint.h" 11 #include "llvm/MC/MCAsmLayout.h" 12 #include "llvm/Support/LEB128.h" 13 #include "llvm/MC/MCStreamer.h" 14 15 using namespace llvm; 16 17 // Each LOH is composed by, in this order (each field is encoded using ULEB128): 18 // - Its kind. 19 // - Its number of arguments (let say N). 20 // - Its arg1. 21 // - ... 22 // - Its argN. 23 // <arg1> to <argN> are absolute addresses in the object file, i.e., 24 // relative addresses from the beginning of the object file. 25 void MCLOHDirective::Emit_impl(raw_ostream &OutStream, 26 const MachObjectWriter &ObjWriter, 27 const MCAsmLayout &Layout) const { 28 const MCAssembler &Asm = Layout.getAssembler(); 29 encodeULEB128(Kind, OutStream); 30 encodeULEB128(Args.size(), OutStream); 31 for (LOHArgs::const_iterator It = Args.begin(), EndIt = Args.end(); 32 It != EndIt; ++It) 33 encodeULEB128(ObjWriter.getSymbolAddress(&Asm.getSymbolData(**It), Layout), 34 OutStream); 35 } 36
