mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
136 lines
3.8 KiB
C++
136 lines
3.8 KiB
C++
//===- lib/MC/MCSectionELF.cpp - ELF Code Section Representation ----------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/MC/MCSectionELF.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCSymbol.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
using namespace llvm;
|
|
|
|
MCSectionELF::~MCSectionELF() {} // anchor.
|
|
|
|
// ShouldOmitSectionDirective - Decides whether a '.section' directive
|
|
// should be printed before the section name
|
|
bool MCSectionELF::ShouldOmitSectionDirective(StringRef Name,
|
|
const MCAsmInfo &MAI) const {
|
|
|
|
// FIXME: Does .section .bss/.data/.text work everywhere??
|
|
if (Name == ".text" || Name == ".data" ||
|
|
(Name == ".bss" && !MAI.usesELFSectionDirectiveForBSS()))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI,
|
|
raw_ostream &OS) const {
|
|
|
|
if (ShouldOmitSectionDirective(SectionName, MAI)) {
|
|
OS << '\t' << getSectionName() << '\n';
|
|
return;
|
|
}
|
|
|
|
OS << "\t.section\t" << getSectionName();
|
|
|
|
// Handle the weird solaris syntax if desired.
|
|
if (MAI.usesSunStyleELFSectionSwitchSyntax() &&
|
|
!(Flags & MCSectionELF::SHF_MERGE)) {
|
|
if (Flags & MCSectionELF::SHF_ALLOC)
|
|
OS << ",#alloc";
|
|
if (Flags & MCSectionELF::SHF_EXECINSTR)
|
|
OS << ",#execinstr";
|
|
if (Flags & MCSectionELF::SHF_WRITE)
|
|
OS << ",#write";
|
|
if (Flags & MCSectionELF::SHF_TLS)
|
|
OS << ",#tls";
|
|
OS << '\n';
|
|
return;
|
|
}
|
|
|
|
OS << ",\"";
|
|
if (Flags & MCSectionELF::SHF_ALLOC)
|
|
OS << 'a';
|
|
if (Flags & MCSectionELF::SHF_EXECINSTR)
|
|
OS << 'x';
|
|
if (Flags & MCSectionELF::SHF_WRITE)
|
|
OS << 'w';
|
|
if (Flags & MCSectionELF::SHF_MERGE)
|
|
OS << 'M';
|
|
if (Flags & MCSectionELF::SHF_STRINGS)
|
|
OS << 'S';
|
|
if (Flags & MCSectionELF::SHF_TLS)
|
|
OS << 'T';
|
|
|
|
// If there are target-specific flags, print them.
|
|
if (Flags & MCSectionELF::XCORE_SHF_CP_SECTION)
|
|
OS << 'c';
|
|
if (Flags & MCSectionELF::XCORE_SHF_DP_SECTION)
|
|
OS << 'd';
|
|
|
|
OS << '"';
|
|
|
|
OS << ',';
|
|
|
|
// If comment string is '@', e.g. as on ARM - use '%' instead
|
|
if (MAI.getCommentString()[0] == '@')
|
|
OS << '%';
|
|
else
|
|
OS << '@';
|
|
|
|
if (Type == MCSectionELF::SHT_INIT_ARRAY)
|
|
OS << "init_array";
|
|
else if (Type == MCSectionELF::SHT_FINI_ARRAY)
|
|
OS << "fini_array";
|
|
else if (Type == MCSectionELF::SHT_PREINIT_ARRAY)
|
|
OS << "preinit_array";
|
|
else if (Type == MCSectionELF::SHT_NOBITS)
|
|
OS << "nobits";
|
|
else if (Type == MCSectionELF::SHT_NOTE)
|
|
OS << "note";
|
|
else if (Type == MCSectionELF::SHT_PROGBITS)
|
|
OS << "progbits";
|
|
|
|
if (EntrySize) {
|
|
assert(Flags & MCSectionELF::SHF_MERGE);
|
|
OS << "," << EntrySize;
|
|
}
|
|
|
|
OS << '\n';
|
|
}
|
|
|
|
bool MCSectionELF::UseCodeAlign() const {
|
|
return getFlags() & MCSectionELF::SHF_EXECINSTR;
|
|
}
|
|
|
|
bool MCSectionELF::isVirtualSection() const {
|
|
return getType() == MCSectionELF::SHT_NOBITS;
|
|
}
|
|
|
|
// HasCommonSymbols - True if this section holds common symbols, this is
|
|
// indicated on the ELF object file by a symbol with SHN_COMMON section
|
|
// header index.
|
|
bool MCSectionELF::HasCommonSymbols() const {
|
|
|
|
if (StringRef(SectionName).startswith(".gnu.linkonce."))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
unsigned MCSectionELF::DetermineEntrySize(SectionKind Kind) {
|
|
if (Kind.isMergeable1ByteCString()) return 1;
|
|
if (Kind.isMergeable2ByteCString()) return 2;
|
|
if (Kind.isMergeable4ByteCString()) return 4;
|
|
if (Kind.isMergeableConst4()) return 4;
|
|
if (Kind.isMergeableConst8()) return 8;
|
|
if (Kind.isMergeableConst16()) return 16;
|
|
return 0;
|
|
}
|