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be30366603
This patch emits the function descriptor csect for functions with definitions under both 32-bit/64-bit mode on AIX. Differential Revision: https://reviews.llvm.org/D66724 llvm-svn: 373009
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
//===- lib/MC/MCSectionXCOFF.cpp - XCOFF Code Section Representation ------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCSectionXCOFF.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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MCSectionXCOFF::~MCSectionXCOFF() = default;
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static StringRef getMappingClassString(XCOFF::StorageMappingClass SMC) {
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switch (SMC) {
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case XCOFF::XMC_DS:
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return "DS";
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case XCOFF::XMC_RW:
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return "RW";
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case XCOFF::XMC_PR:
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return "PR";
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default:
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report_fatal_error("Unhandled storage-mapping class.");
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}
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}
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void MCSectionXCOFF::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
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raw_ostream &OS,
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const MCExpr *Subsection) const {
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if (getKind().isText()) {
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if (getMappingClass() != XCOFF::XMC_PR)
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report_fatal_error("Unhandled storage-mapping class for .text csect");
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OS << "\t.csect " << getSectionName() << "["
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<< getMappingClassString(getMappingClass())
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<< "]" << '\n';
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return;
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}
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if (getKind().isData()) {
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switch (getMappingClass()) {
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case XCOFF::XMC_RW:
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case XCOFF::XMC_DS:
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OS << "\t.csect " << getSectionName() << "["
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<< getMappingClassString(getMappingClass()) << "]" << '\n';
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break;
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case XCOFF::XMC_TC0:
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OS << "\t.toc\n";
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break;
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default:
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report_fatal_error(
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"Unhandled storage-mapping class for .data csect.");
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}
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return;
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}
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if (getKind().isBSSLocal() || getKind().isCommon()) {
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assert((getMappingClass() == XCOFF::XMC_RW ||
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getMappingClass() == XCOFF::XMC_BS) &&
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"Generated a storage-mapping class for a common/bss csect we don't "
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"understand how to switch to.");
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assert(getCSectType() == XCOFF::XTY_CM &&
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"wrong csect type for .bss csect");
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// Don't have to print a directive for switching to section for commons.
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// '.comm' and '.lcomm' directives for the variable will create the needed
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// csect.
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return;
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}
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report_fatal_error("Printing for this SectionKind is unimplemented.");
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}
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bool MCSectionXCOFF::UseCodeAlign() const { return getKind().isText(); }
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bool MCSectionXCOFF::isVirtualSection() const { return XCOFF::XTY_CM == Type; }
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