//===----------------------------------------------------------------------===//
#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
// MCSection
//===----------------------------------------------------------------------===//
-MCSection::~MCSection() {
-}
-
-
-//===----------------------------------------------------------------------===//
-// MCSectionELF
-//===----------------------------------------------------------------------===//
+MCSection::MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin)
+ : Begin(Begin), BundleGroupBeforeFirstInst(false), HasInstructions(false),
+ IsRegistered(false), DummyFragment(this), Variant(V), Kind(K) {}
-MCSectionELF *MCSectionELF::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
- return new (Ctx) MCSectionELF(Name, IsDirective, K, Ctx);
+MCSymbol *MCSection::getEndSymbol(MCContext &Ctx) {
+ if (!End)
+ End = Ctx.createTempSymbol("sec_end", true);
+ return End;
}
-MCSectionELF::MCSectionELF(const StringRef &name, bool isDirective,
- SectionKind K, MCContext &Ctx)
- : MCSection(K), Name(name), IsDirective(isDirective) {
- Ctx.SetSection(Name, this);
-}
+bool MCSection::hasEnded() const { return End && End->isInSection(); }
+MCSection::~MCSection() {
+}
-void MCSectionELF::PrintSwitchToSection(const TargetAsmInfo &TAI,
- raw_ostream &OS) const {
- if (isDirective()) {
- OS << getName() << '\n';
+void MCSection::setBundleLockState(BundleLockStateType NewState) {
+ if (NewState == NotBundleLocked) {
+ if (BundleLockNestingDepth == 0) {
+ report_fatal_error("Mismatched bundle_lock/unlock directives");
+ }
+ if (--BundleLockNestingDepth == 0) {
+ BundleLockState = NotBundleLocked;
+ }
return;
}
- OS << "\t.section\t" << getName();
-
- // Handle the weird solaris syntax if desired.
- if (TAI.usesSunStyleELFSectionSwitchSyntax() &&
- !getKind().isMergeableConst() && !getKind().isMergeableCString()) {
- if (!getKind().isMetadata())
- OS << ",#alloc";
- if (getKind().isText())
- OS << ",#execinstr";
- if (getKind().isWriteable())
- OS << ",#write";
- if (getKind().isThreadLocal())
- OS << ",#tls";
- } else {
- OS << ",\"";
-
- if (!getKind().isMetadata())
- OS << 'a';
- if (getKind().isText())
- OS << 'x';
- if (getKind().isWriteable())
- OS << 'w';
- if (getKind().isMergeable1ByteCString() ||
- getKind().isMergeable2ByteCString() ||
- getKind().isMergeable4ByteCString() ||
- getKind().isMergeableConst4() ||
- getKind().isMergeableConst8() ||
- getKind().isMergeableConst16())
- OS << 'M';
- if (getKind().isMergeable1ByteCString() ||
- getKind().isMergeable2ByteCString() ||
- getKind().isMergeable4ByteCString())
- OS << 'S';
- if (getKind().isThreadLocal())
- OS << 'T';
-
- OS << "\",";
-
- // If comment string is '@', e.g. as on ARM - use '%' instead
- if (TAI.getCommentString()[0] == '@')
- OS << '%';
- else
- OS << '@';
-
- if (getKind().isBSS() || getKind().isThreadBSS())
- OS << "nobits";
- else
- OS << "progbits";
-
- if (getKind().isMergeable1ByteCString()) {
- OS << ",1";
- } else if (getKind().isMergeable2ByteCString()) {
- OS << ",2";
- } else if (getKind().isMergeable4ByteCString()) {
- OS << ",4";
- } else if (getKind().isMergeableConst4()) {
- OS << ",4";
- } else if (getKind().isMergeableConst8()) {
- OS << ",8";
- } else if (getKind().isMergeableConst16()) {
- OS << ",16";
- }
+ // If any of the directives is an align_to_end directive, the whole nested
+ // group is align_to_end. So don't downgrade from align_to_end to just locked.
+ if (BundleLockState != BundleLockedAlignToEnd) {
+ BundleLockState = NewState;
}
-
- OS << '\n';
+ ++BundleLockNestingDepth;
}
-//===----------------------------------------------------------------------===//
-// MCSectionMachO
-//===----------------------------------------------------------------------===//
-
-/// SectionTypeDescriptors - These are strings that describe the various section
-/// types. This *must* be kept in order with and stay synchronized with the
-/// section type list.
-static const struct {
- const char *AssemblerName, *EnumName;
-} SectionTypeDescriptors[MCSectionMachO::LAST_KNOWN_SECTION_TYPE+1] = {
- { "regular", "S_REGULAR" }, // 0x00
- { 0, "S_ZEROFILL" }, // 0x01
- { "cstring_literals", "S_CSTRING_LITERALS" }, // 0x02
- { "4byte_literals", "S_4BYTE_LITERALS" }, // 0x03
- { "8byte_literals", "S_8BYTE_LITERALS" }, // 0x04
- { "literal_pointers", "S_LITERAL_POINTERS" }, // 0x05
- { "non_lazy_symbol_pointers", "S_NON_LAZY_SYMBOL_POINTERS" }, // 0x06
- { "lazy_symbol_pointers", "S_LAZY_SYMBOL_POINTERS" }, // 0x07
- { "symbol_stubs", "S_SYMBOL_STUBS" }, // 0x08
- { "mod_init_funcs", "S_MOD_INIT_FUNC_POINTERS" }, // 0x09
- { "mod_term_funcs", "S_MOD_TERM_FUNC_POINTERS" }, // 0x0A
- { "coalesced", "S_COALESCED" }, // 0x0B
- { 0, /*FIXME??*/ "S_GB_ZEROFILL" }, // 0x0C
- { "interposing", "S_INTERPOSING" }, // 0x0D
- { "16byte_literals", "S_16BYTE_LITERALS" }, // 0x0E
- { 0, /*FIXME??*/ "S_DTRACE_DOF" }, // 0x0F
- { 0, /*FIXME??*/ "S_LAZY_DYLIB_SYMBOL_POINTERS" } // 0x10
-};
-
-
-/// SectionAttrDescriptors - This is an array of descriptors for section
-/// attributes. Unlike the SectionTypeDescriptors, this is not directly indexed
-/// by attribute, instead it is searched. The last entry has a zero AttrFlag
-/// value.
-static const struct {
- unsigned AttrFlag;
- const char *AssemblerName, *EnumName;
-} SectionAttrDescriptors[] = {
-#define ENTRY(ASMNAME, ENUM) \
- { MCSectionMachO::ENUM, ASMNAME, #ENUM },
-ENTRY("pure_instructions", S_ATTR_PURE_INSTRUCTIONS)
-ENTRY("no_toc", S_ATTR_NO_TOC)
-ENTRY("strip_static_syms", S_ATTR_STRIP_STATIC_SYMS)
-ENTRY("no_dead_strip", S_ATTR_NO_DEAD_STRIP)
-ENTRY("live_support", S_ATTR_LIVE_SUPPORT)
-ENTRY("self_modifying_code", S_ATTR_SELF_MODIFYING_CODE)
-ENTRY("debug", S_ATTR_DEBUG)
-ENTRY(0 /*FIXME*/, S_ATTR_SOME_INSTRUCTIONS)
-ENTRY(0 /*FIXME*/, S_ATTR_EXT_RELOC)
-ENTRY(0 /*FIXME*/, S_ATTR_LOC_RELOC)
-#undef ENTRY
- { 0, "none", 0 }
-};
-
-
-MCSectionMachO *MCSectionMachO::
-Create(const StringRef &Segment, const StringRef &Section,
- unsigned TypeAndAttributes, unsigned Reserved2,
- SectionKind K, MCContext &Ctx) {
- // S_SYMBOL_STUBS must be set for Reserved2 to be non-zero.
- return new (Ctx) MCSectionMachO(Segment, Section, TypeAndAttributes,
- Reserved2, K);
-}
-
-void MCSectionMachO::PrintSwitchToSection(const TargetAsmInfo &TAI,
- raw_ostream &OS) const {
- OS << "\t.section\t" << getSegmentName() << ',' << getSectionName();
-
- // Get the section type and attributes.
- unsigned TAA = getTypeAndAttributes();
- if (TAA == 0) {
- OS << '\n';
- return;
+MCSection::iterator
+MCSection::getSubsectionInsertionPoint(unsigned Subsection) {
+ if (Subsection == 0 && SubsectionFragmentMap.empty())
+ return end();
+
+ SmallVectorImpl<std::pair<unsigned, MCFragment *>>::iterator MI =
+ std::lower_bound(SubsectionFragmentMap.begin(),
+ SubsectionFragmentMap.end(),
+ std::make_pair(Subsection, (MCFragment *)nullptr));
+ bool ExactMatch = false;
+ if (MI != SubsectionFragmentMap.end()) {
+ ExactMatch = MI->first == Subsection;
+ if (ExactMatch)
+ ++MI;
}
-
- OS << ',';
-
- unsigned SectionType = TAA & MCSectionMachO::SECTION_TYPE;
- assert(SectionType <= MCSectionMachO::LAST_KNOWN_SECTION_TYPE &&
- "Invalid SectionType specified!");
-
- if (SectionTypeDescriptors[SectionType].AssemblerName)
- OS << SectionTypeDescriptors[SectionType].AssemblerName;
+ iterator IP;
+ if (MI == SubsectionFragmentMap.end())
+ IP = end();
else
- OS << "<<" << SectionTypeDescriptors[SectionType].EnumName << ">>";
-
- // If we don't have any attributes, we're done.
- unsigned SectionAttrs = TAA & MCSectionMachO::SECTION_ATTRIBUTES;
- if (SectionAttrs == 0) {
- // If we have a S_SYMBOL_STUBS size specified, print it along with 'none' as
- // the attribute specifier.
- if (Reserved2 != 0)
- OS << ",none," << Reserved2;
- OS << '\n';
- return;
- }
-
- // Check each attribute to see if we have it.
- char Separator = ',';
- for (unsigned i = 0; SectionAttrDescriptors[i].AttrFlag; ++i) {
- // Check to see if we have this attribute.
- if ((SectionAttrDescriptors[i].AttrFlag & SectionAttrs) == 0)
- continue;
-
- // Yep, clear it and print it.
- SectionAttrs &= ~SectionAttrDescriptors[i].AttrFlag;
-
- OS << Separator;
- if (SectionAttrDescriptors[i].AssemblerName)
- OS << SectionAttrDescriptors[i].AssemblerName;
- else
- OS << "<<" << SectionAttrDescriptors[i].EnumName << ">>";
- Separator = '+';
+ IP = MI->second->getIterator();
+ if (!ExactMatch && Subsection != 0) {
+ // The GNU as documentation claims that subsections have an alignment of 4,
+ // although this appears not to be the case.
+ MCFragment *F = new MCDataFragment();
+ SubsectionFragmentMap.insert(MI, std::make_pair(Subsection, F));
+ getFragmentList().insert(IP, F);
+ F->setParent(this);
}
-
- assert(SectionAttrs == 0 && "Unknown section attributes!");
-
- // If we have a S_SYMBOL_STUBS size specified, print it.
- if (Reserved2 != 0)
- OS << ',' << Reserved2;
- OS << '\n';
-}
-/// StripSpaces - This removes leading and trailing spaces from the StringRef.
-static void StripSpaces(StringRef &Str) {
- while (!Str.empty() && isspace(Str[0]))
- Str = Str.substr(1);
- while (!Str.empty() && isspace(Str.back()))
- Str = Str.substr(0, Str.size()-1);
+ return IP;
}
-/// ParseSectionSpecifier - Parse the section specifier indicated by "Spec".
-/// This is a string that can appear after a .section directive in a mach-o
-/// flavored .s file. If successful, this fills in the specified Out
-/// parameters and returns an empty string. When an invalid section
-/// specifier is present, this returns a string indicating the problem.
-std::string MCSectionMachO::ParseSectionSpecifier(StringRef Spec, // In.
- StringRef &Segment, // Out.
- StringRef &Section, // Out.
- unsigned &TAA, // Out.
- unsigned &StubSize) { // Out.
- // Find the first comma.
- std::pair<StringRef, StringRef> Comma = Spec.split(',');
-
- // If there is no comma, we fail.
- if (Comma.second.empty())
- return "mach-o section specifier requires a segment and section "
- "separated by a comma";
-
- // Capture segment, remove leading and trailing whitespace.
- Segment = Comma.first;
- StripSpaces(Segment);
-
- // Verify that the segment is present and not too long.
- if (Segment.empty() || Segment.size() > 16)
- return "mach-o section specifier requires a segment whose length is "
- "between 1 and 16 characters";
-
- // Split the section name off from any attributes if present.
- Comma = Comma.second.split(',');
-
- // Capture section, remove leading and trailing whitespace.
- Section = Comma.first;
- StripSpaces(Section);
-
- // Verify that the section is present and not too long.
- if (Section.empty() || Section.size() > 16)
- return "mach-o section specifier requires a section whose length is "
- "between 1 and 16 characters";
-
- // If there is no comma after the section, we're done.
- TAA = 0;
- StubSize = 0;
- if (Comma.second.empty())
- return "";
-
- // Otherwise, we need to parse the section type and attributes.
- Comma = Comma.second.split(',');
-
- // Get the section type.
- StringRef SectionType = Comma.first;
- StripSpaces(SectionType);
-
- // Figure out which section type it is.
- unsigned TypeID;
- for (TypeID = 0; TypeID !=MCSectionMachO::LAST_KNOWN_SECTION_TYPE+1; ++TypeID)
- if (SectionTypeDescriptors[TypeID].AssemblerName &&
- SectionType == SectionTypeDescriptors[TypeID].AssemblerName)
- break;
-
- // If we didn't find the section type, reject it.
- if (TypeID > MCSectionMachO::LAST_KNOWN_SECTION_TYPE)
- return "mach-o section specifier uses an unknown section type";
-
- // Remember the TypeID.
- TAA = TypeID;
-
- // If we have no comma after the section type, there are no attributes.
- if (Comma.second.empty()) {
- // S_SYMBOL_STUBS always require a symbol stub size specifier.
- if (TAA == MCSectionMachO::S_SYMBOL_STUBS)
- return "mach-o section specifier of type 'symbol_stubs' requires a size "
- "specifier";
- return "";
- }
-
- // Otherwise, we do have some attributes. Split off the size specifier if
- // present.
- Comma = Comma.second.split(',');
- StringRef Attrs = Comma.first;
-
- // The attribute list is a '+' separated list of attributes.
- std::pair<StringRef, StringRef> Plus = Attrs.split('+');
-
- while (1) {
- StringRef Attr = Plus.first;
- StripSpaces(Attr);
-
- // Look up the attribute.
- for (unsigned i = 0; ; ++i) {
- if (SectionAttrDescriptors[i].AttrFlag == 0)
- return "mach-o section specifier has invalid attribute";
-
- if (SectionAttrDescriptors[i].AssemblerName &&
- Attr == SectionAttrDescriptors[i].AssemblerName) {
- TAA |= SectionAttrDescriptors[i].AttrFlag;
- break;
- }
- }
-
- if (Plus.second.empty()) break;
- Plus = Plus.second.split('+');
- };
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+void MCSection::dump() {
+ raw_ostream &OS = llvm::errs();
- // Okay, we've parsed the section attributes, see if we have a stub size spec.
- if (Comma.second.empty()) {
- // S_SYMBOL_STUBS always require a symbol stub size specifier.
- if (TAA == MCSectionMachO::S_SYMBOL_STUBS)
- return "mach-o section specifier of type 'symbol_stubs' requires a size "
- "specifier";
- return "";
+ OS << "<MCSection";
+ OS << " Fragments:[\n ";
+ for (auto it = begin(), ie = end(); it != ie; ++it) {
+ if (it != begin())
+ OS << ",\n ";
+ it->dump();
}
-
- // If we have a stub size spec, we must have a sectiontype of S_SYMBOL_STUBS.
- if ((TAA & MCSectionMachO::SECTION_TYPE) != MCSectionMachO::S_SYMBOL_STUBS)
- return "mach-o section specifier cannot have a stub size specified because "
- "it does not have type 'symbol_stubs'";
-
- // Okay, if we do, it must be a number.
- StringRef StubSizeStr = Comma.second;
- StripSpaces(StubSizeStr);
-
- // Convert the a null terminated buffer for strtoul.
- char TmpBuffer[32];
- if (StubSizeStr.size() >= 32)
- return"mach-o section specifier has a stub size specifier that is too long";
-
- memcpy(TmpBuffer, StubSizeStr.data(), StubSizeStr.size());
- TmpBuffer[StubSizeStr.size()] = 0;
-
- char *EndPtr;
- StubSize = strtoul(TmpBuffer, &EndPtr, 0);
-
- if (EndPtr[0] != 0)
- return "mach-o section specifier has a malformed stub size";
-
- return "";
+ OS << "]>";
}
+#endif
+MCSection::iterator MCSection::begin() { return Fragments.begin(); }
-//===----------------------------------------------------------------------===//
-// MCSectionCOFF
-//===----------------------------------------------------------------------===//
+MCSection::iterator MCSection::end() { return Fragments.end(); }
-MCSectionCOFF *MCSectionCOFF::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
- return new (Ctx) MCSectionCOFF(Name, IsDirective, K, Ctx);
-}
+MCSection::reverse_iterator MCSection::rbegin() { return Fragments.rbegin(); }
-MCSectionCOFF::MCSectionCOFF(const StringRef &name, bool isDirective,
- SectionKind K, MCContext &Ctx)
- : MCSection(K), Name(name), IsDirective(isDirective) {
- Ctx.SetSection(Name, this);
-}
-
-
-void MCSectionCOFF::PrintSwitchToSection(const TargetAsmInfo &TAI,
- raw_ostream &OS) const {
-
- if (isDirective()) {
- OS << getName() << '\n';
- return;
- }
- OS << "\t.section\t" << getName() << ",\"";
- if (getKind().isText())
- OS << 'x';
- if (getKind().isWriteable())
- OS << 'w';
- OS << "\"\n";
-}
+MCSection::reverse_iterator MCSection::rend() { return Fragments.rend(); }
projects / oota-llvm.git / blobdiff