2019-07-10 03:21:01 +08:00
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//===- 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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2019-09-27 03:38:32 +08:00
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2019-07-10 03:21:01 +08:00
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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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2019-07-23 03:15:29 +08:00
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if (getMappingClass() != XCOFF::XMC_PR)
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2019-09-27 03:38:32 +08:00
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report_fatal_error("Unhandled storage-mapping class for .text csect");
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2019-07-23 03:15:29 +08:00
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[XCOFF][AIX] Differentiate usage of label symbol and csect symbol
Summary:
We are using symbols to represent label and csect interchangeably before, and that could be a problem.
There are cases we would need to add storage mapping class to the symbol if that symbol is actually the name of a csect, but it's hard for us to figure out whether that symbol is a label or csect.
This patch intend to do the following:
1. Construct a QualName (A name include the storage mapping class)
MCSymbolXCOFF for every MCSectionXCOFF.
2. Keep a pointer to that QualName inside of MCSectionXCOFF.
3. Use that QualName whenever we need a symbol refers to that
MCSectionXCOFF.
4. Adapt the snowball effect from the above changes in
XCOFFObjectWriter.cpp.
Reviewers: xingxue, DiggerLin, sfertile, daltenty, hubert.reinterpretcast
Reviewed By: DiggerLin, daltenty
Subscribers: wuzish, nemanjai, mgorny, hiraditya, kbarton, jsji, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D69633
2019-11-08 22:26:28 +08:00
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OS << "\t.csect " << QualName->getName() << '\n';
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2019-07-10 03:21:01 +08:00
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return;
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}
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2019-11-16 00:30:19 +08:00
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if (getKind().isReadOnly()) {
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if (getMappingClass() != XCOFF::XMC_RO)
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report_fatal_error("Unhandled storage-mapping class for .rodata csect.");
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OS << "\t.csect " << QualName->getName() << '\n';
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return;
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}
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[PowerPC][AIX] Adds support for writing the .data section in assembly files
Summary:
Adds support for generating the .data section in assembly files for global variables with a non-zero initialization. The support for writing the .data section in XCOFF object files will be added in a follow-on patch. Any relocations are not included in this patch.
Reviewers: hubert.reinterpretcast, sfertile, jasonliu, daltenty, Xiangling_L
Reviewed by: hubert.reinterpretcast
Subscribers: nemanjai, hiraditya, kbarton, MaskRay, jsji, wuzish, shchenz, DiggerLin, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66154
llvm-svn: 369869
2019-08-25 23:17:25 +08:00
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if (getKind().isData()) {
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2019-09-27 03:38:32 +08:00
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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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[XCOFF][AIX] Differentiate usage of label symbol and csect symbol
Summary:
We are using symbols to represent label and csect interchangeably before, and that could be a problem.
There are cases we would need to add storage mapping class to the symbol if that symbol is actually the name of a csect, but it's hard for us to figure out whether that symbol is a label or csect.
This patch intend to do the following:
1. Construct a QualName (A name include the storage mapping class)
MCSymbolXCOFF for every MCSectionXCOFF.
2. Keep a pointer to that QualName inside of MCSectionXCOFF.
3. Use that QualName whenever we need a symbol refers to that
MCSectionXCOFF.
4. Adapt the snowball effect from the above changes in
XCOFFObjectWriter.cpp.
Reviewers: xingxue, DiggerLin, sfertile, daltenty, hubert.reinterpretcast
Reviewed By: DiggerLin, daltenty
Subscribers: wuzish, nemanjai, mgorny, hiraditya, kbarton, jsji, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D69633
2019-11-08 22:26:28 +08:00
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OS << "\t.csect " << QualName->getName() << '\n';
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2019-09-27 03:38:32 +08:00
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break;
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[AIX] Emit TOC entries for ASM printing
Summary:
Emit the correct .toc psuedo op when we change to the TOC and emit
TC entries. Make sure TOC psuedos get the right symbols via overriding
getMCSymbolForTOCPseudoMO on AIX. Add a test for TOC assembly writing
and update tests to include TOC entries.
Also make sure external globals have a csect set and handle external function descriptor (originally authored by Jason Liu) so we can emit TOC entries for them.
Reviewers: DiggerLin, sfertile, Xiangling_L, jasonliu, hubert.reinterpretcast
Reviewed By: jasonliu
Subscribers: arphaman, wuzish, nemanjai, hiraditya, kbarton, jsji, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D70461
2019-11-28 06:17:02 +08:00
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case XCOFF::XMC_TC:
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break;
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2019-09-27 03:38:32 +08:00
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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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[PowerPC][AIX] Adds support for writing the .data section in assembly files
Summary:
Adds support for generating the .data section in assembly files for global variables with a non-zero initialization. The support for writing the .data section in XCOFF object files will be added in a follow-on patch. Any relocations are not included in this patch.
Reviewers: hubert.reinterpretcast, sfertile, jasonliu, daltenty, Xiangling_L
Reviewed by: hubert.reinterpretcast
Subscribers: nemanjai, hiraditya, kbarton, MaskRay, jsji, wuzish, shchenz, DiggerLin, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66154
llvm-svn: 369869
2019-08-25 23:17:25 +08:00
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return;
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}
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Enable assembly output of local commons for AIX
Summary:
This patch enable assembly output of local commons for AIX using .lcomm
directives. Adds a EmitXCOFFLocalCommonSymbol to MCStreamer so we can emit the
AIX version of .lcomm assembly directives which include a csect name. Handle the
case of BSS locals in PPCAIXAsmPrinter by using EmitXCOFFLocalCommonSymbol. Adds
a test for generating .lcomm on AIX Targets.
Reviewers: cebowleratibm, hubert.reinterpretcast, Xiangling_L, jasonliu, sfertile
Reviewed By: sfertile
Subscribers: wuzish, nemanjai, hiraditya, kbarton, MaskRay, jsji, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D64825
llvm-svn: 368306
2019-08-08 23:40:35 +08:00
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if (getKind().isBSSLocal() || getKind().isCommon()) {
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2019-08-14 01:04:51 +08:00
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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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2019-07-23 03:15:29 +08:00
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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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2019-07-10 03:21:01 +08:00
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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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2019-07-23 03:15:29 +08:00
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bool MCSectionXCOFF::isVirtualSection() const { return XCOFF::XTY_CM == Type; }
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