1 //===-- AVRTargetStreamer.cpp - AVR Target Streamer Methods ---------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file provides AVR specific target streamer methods. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "AVRTargetStreamer.h" 14 15 #include "llvm/MC/MCContext.h" 16 17 namespace llvm { 18 AVRTargetStreamer(MCStreamer & S)19AVRTargetStreamer::AVRTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {} 20 AVRTargetAsmStreamer(MCStreamer & S)21AVRTargetAsmStreamer::AVRTargetAsmStreamer(MCStreamer &S) 22 : AVRTargetStreamer(S) {} 23 finish()24void AVRTargetStreamer::finish() { 25 MCStreamer &OS = getStreamer(); 26 MCContext &Context = OS.getContext(); 27 28 MCSymbol *DoCopyData = Context.getOrCreateSymbol("__do_copy_data"); 29 MCSymbol *DoClearBss = Context.getOrCreateSymbol("__do_clear_bss"); 30 31 // FIXME: We can disable __do_copy_data if there are no static RAM variables. 32 33 OS.emitRawComment(" Declaring this symbol tells the CRT that it should"); 34 OS.emitRawComment("copy all variables from program memory to RAM on startup"); 35 OS.emitSymbolAttribute(DoCopyData, MCSA_Global); 36 37 OS.emitRawComment(" Declaring this symbol tells the CRT that it should"); 38 OS.emitRawComment("clear the zeroed data section on startup"); 39 OS.emitSymbolAttribute(DoClearBss, MCSA_Global); 40 } 41 42 } // end namespace llvm 43 44