lib/MC/MCSectionXCOFF.cpp

   1 //===- lib/MC/MCSectionXCOFF.cpp - XCOFF Code Section Representation ------===//
   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 #include "llvm/MC/MCSectionXCOFF.h"
  10 #include "llvm/MC/MCAsmInfo.h"
  11 #include "llvm/MC/MCExpr.h"
  12 #include "llvm/Support/raw_ostream.h"
  13
  14 using namespace llvm;
  15
  16 MCSectionXCOFF::~MCSectionXCOFF() = default;
  17
  18 void MCSectionXCOFF::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
  19                                           raw_ostream &OS,
  20                                           const MCExpr *Subsection) const {
  21   if (getKind().isText()) {
  22     if (getMappingClass() != XCOFF::XMC_PR)
  23       llvm_unreachable("Unsupported storage-mapping class for .text csect");
  24
  25     OS << "\t.csect " << getSectionName() << "["
  26        << "PR"
  27        << "]" << '\n';
  28     return;
  29   }
  30
  31   if (getKind().isData()) {
  32     assert(getMappingClass() == XCOFF::XMC_RW &&
  33            "Unhandled storage-mapping class for data section.");
  34
  35     OS << "\t.csect " << getSectionName() << "["
  36        << "RW"
  37        << "]" << '\n';
  38     return;
  39   }
  40
  41   if (getKind().isBSSLocal() || getKind().isCommon()) {
  42     assert((getMappingClass() == XCOFF::XMC_RW ||
  43             getMappingClass() == XCOFF::XMC_BS) &&
  44            "Generated a storage-mapping class for a common/bss csect we don't "
  45            "understand how to switch to.");
  46     assert(getCSectType() == XCOFF::XTY_CM &&
  47            "wrong csect type for .bss csect");
  48     // Don't have to print a directive for switching to section for commons.
  49     // '.comm' and '.lcomm' directives for the variable will create the needed
  50     // csect.
  51     return;
  52   }
  53
  54   report_fatal_error("Printing for this SectionKind is unimplemented.");
  55 }
  56
  57 bool MCSectionXCOFF::UseCodeAlign() const { return getKind().isText(); }
  58
  59 bool MCSectionXCOFF::isVirtualSection() const { return XCOFF::XTY_CM == Type; }