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| //===- lib/MC/MCSectionXCOFF.cpp - XCOFF Code Section Representation ------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCSectionXCOFF.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
MCSectionXCOFF::~MCSectionXCOFF() = default;
static StringRef getMappingClassString(XCOFF::StorageMappingClass SMC) {
switch (SMC) {
case XCOFF::XMC_DS:
return "DS";
case XCOFF::XMC_RW:
return "RW";
case XCOFF::XMC_PR:
return "PR";
default:
report_fatal_error("Unhandled storage-mapping class.");
}
}
void MCSectionXCOFF::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
raw_ostream &OS,
const MCExpr *Subsection) const {
if (getKind().isText()) {
if (getMappingClass() != XCOFF::XMC_PR)
report_fatal_error("Unhandled storage-mapping class for .text csect");
OS << "\t.csect " << getSectionName() << "["
<< getMappingClassString(getMappingClass())
<< "]" << '\n';
return;
}
if (getKind().isData()) {
switch (getMappingClass()) {
case XCOFF::XMC_RW:
case XCOFF::XMC_DS:
OS << "\t.csect " << getSectionName() << "["
<< getMappingClassString(getMappingClass()) << "]" << '\n';
break;
case XCOFF::XMC_TC0:
OS << "\t.toc\n";
break;
default:
report_fatal_error(
"Unhandled storage-mapping class for .data csect.");
}
return;
}
if (getKind().isBSSLocal() || getKind().isCommon()) {
assert((getMappingClass() == XCOFF::XMC_RW ||
getMappingClass() == XCOFF::XMC_BS) &&
"Generated a storage-mapping class for a common/bss csect we don't "
"understand how to switch to.");
assert(getCSectType() == XCOFF::XTY_CM &&
"wrong csect type for .bss csect");
// Don't have to print a directive for switching to section for commons.
// '.comm' and '.lcomm' directives for the variable will create the needed
// csect.
return;
}
report_fatal_error("Printing for this SectionKind is unimplemented.");
}
bool MCSectionXCOFF::UseCodeAlign() const { return getKind().isText(); }
bool MCSectionXCOFF::isVirtualSection() const { return XCOFF::XTY_CM == Type; }
|