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 
19 void MCSectionXCOFF::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
20                                           raw_ostream &OS,
21                                           const MCExpr *Subsection) const {
22   if (getKind().isText()) {
23     if (getMappingClass() != XCOFF::XMC_PR)
24       report_fatal_error("Unhandled storage-mapping class for .text csect");
25 
26     OS << "\t.csect " << QualName->getName() << '\n';
27     return;
28   }
29 
30   if (getKind().isData()) {
31     switch (getMappingClass()) {
32     case XCOFF::XMC_RW:
33     case XCOFF::XMC_DS:
34       OS << "\t.csect " << QualName->getName() << '\n';
35       break;
36     case XCOFF::XMC_TC0:
37       OS << "\t.toc\n";
38       break;
39     default:
40       report_fatal_error(
41           "Unhandled storage-mapping class for .data csect.");
42     }
43     return;
44   }
45 
46   if (getKind().isBSSLocal() || getKind().isCommon()) {
47     assert((getMappingClass() == XCOFF::XMC_RW ||
48             getMappingClass() == XCOFF::XMC_BS) &&
49            "Generated a storage-mapping class for a common/bss csect we don't "
50            "understand how to switch to.");
51     assert(getCSectType() == XCOFF::XTY_CM &&
52            "wrong csect type for .bss csect");
53     // Don't have to print a directive for switching to section for commons.
54     // '.comm' and '.lcomm' directives for the variable will create the needed
55     // csect.
56     return;
57   }
58 
59   report_fatal_error("Printing for this SectionKind is unimplemented.");
60 }
61 
62 bool MCSectionXCOFF::UseCodeAlign() const { return getKind().isText(); }
63 
64 bool MCSectionXCOFF::isVirtualSection() const { return XCOFF::XTY_CM == Type; }
65