1 //===- lib/MC/MCSectionCOFF.cpp - COFF Code Section Representation --------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCSectionCOFF.h"
11 #include "llvm/MC/MCAsmInfo.h"
12 #include "llvm/MC/MCContext.h"
13 #include "llvm/MC/MCSymbol.h"
14 #include "llvm/Support/raw_ostream.h"
17 MCSectionCOFF::~MCSectionCOFF() {} // anchor.
19 // ShouldOmitSectionDirective - Decides whether a '.section' directive
20 // should be printed before the section name
21 bool MCSectionCOFF::ShouldOmitSectionDirective(StringRef Name,
22 const MCAsmInfo &MAI) const {
26 // FIXME: Does .section .bss/.data/.text work everywhere??
27 if (Name == ".text" || Name == ".data" || Name == ".bss")
33 void MCSectionCOFF::setSelection(int Selection,
34 const MCSectionCOFF *Assoc) const {
35 assert(Selection != 0 && "invalid COMDAT selection type");
36 assert((Selection == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE) ==
38 "associative COMDAT section must have an associated section");
39 this->Selection = Selection;
41 Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
44 void MCSectionCOFF::PrintSwitchToSection(const MCAsmInfo &MAI,
46 const MCExpr *Subsection) const {
48 // standard sections don't require the '.section'
49 if (ShouldOmitSectionDirective(SectionName, MAI)) {
50 OS << '\t' << getSectionName() << '\n';
54 OS << "\t.section\t" << getSectionName() << ",\"";
55 if (getKind().isText())
57 if (getKind().isWriteable())
61 if (getCharacteristics() & COFF::IMAGE_SCN_MEM_DISCARDABLE)
66 if (getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT) {
69 case COFF::IMAGE_COMDAT_SELECT_NODUPLICATES:
72 case COFF::IMAGE_COMDAT_SELECT_ANY:
75 case COFF::IMAGE_COMDAT_SELECT_SAME_SIZE:
78 case COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH:
79 OS << "same_contents,";
81 case COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE:
82 OS << "associative " << Assoc->getSectionName() << ",";
84 case COFF::IMAGE_COMDAT_SELECT_LARGEST:
87 case COFF::IMAGE_COMDAT_SELECT_NEWEST:
91 assert (0 && "unsupported COFF selection type");
100 bool MCSectionCOFF::UseCodeAlign() const {
101 return getKind().isText();
104 bool MCSectionCOFF::isVirtualSection() const {
105 return getCharacteristics() & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;