diff options
Diffstat (limited to 'contrib/llvm/lib/MC/MCSectionMachO.cpp')
| -rw-r--r-- | contrib/llvm/lib/MC/MCSectionMachO.cpp | 62 |
1 files changed, 36 insertions, 26 deletions
diff --git a/contrib/llvm/lib/MC/MCSectionMachO.cpp b/contrib/llvm/lib/MC/MCSectionMachO.cpp index ded3b20..b897c0b 100644 --- a/contrib/llvm/lib/MC/MCSectionMachO.cpp +++ b/contrib/llvm/lib/MC/MCSectionMachO.cpp @@ -10,6 +10,7 @@ #include "llvm/MC/MCSectionMachO.h" #include "llvm/MC/MCContext.h" #include "llvm/Support/raw_ostream.h" +#include <cctype> using namespace llvm; /// SectionTypeDescriptors - These are strings that describe the various section @@ -81,18 +82,18 @@ MCSectionMachO::MCSectionMachO(StringRef Segment, StringRef Section, SegmentName[i] = Segment[i]; else SegmentName[i] = 0; - + if (i < Section.size()) SectionName[i] = Section[i]; else SectionName[i] = 0; - } + } } void MCSectionMachO::PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS) const { OS << "\t.section\t" << getSegmentName() << ',' << getSectionName(); - + // Get the section type and attributes. unsigned TAA = getTypeAndAttributes(); if (TAA == 0) { @@ -101,7 +102,7 @@ void MCSectionMachO::PrintSwitchToSection(const MCAsmInfo &MAI, } OS << ','; - + unsigned SectionType = TAA & MCSectionMachO::SECTION_TYPE; assert(SectionType <= MCSectionMachO::LAST_KNOWN_SECTION_TYPE && "Invalid SectionType specified!"); @@ -110,7 +111,7 @@ void MCSectionMachO::PrintSwitchToSection(const MCAsmInfo &MAI, OS << SectionTypeDescriptors[SectionType].AssemblerName; else OS << "<<" << SectionTypeDescriptors[SectionType].EnumName << ">>"; - + // If we don't have any attributes, we're done. unsigned SectionAttrs = TAA & MCSectionMachO::SECTION_ATTRIBUTES; if (SectionAttrs == 0) { @@ -128,10 +129,10 @@ void MCSectionMachO::PrintSwitchToSection(const MCAsmInfo &MAI, // 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; @@ -139,15 +140,25 @@ void MCSectionMachO::PrintSwitchToSection(const MCAsmInfo &MAI, OS << "<<" << SectionAttrDescriptors[i].EnumName << ">>"; Separator = '+'; } - + assert(SectionAttrs == 0 && "Unknown section attributes!"); - + // If we have a S_SYMBOL_STUBS size specified, print it. if (Reserved2 != 0) OS << ',' << Reserved2; OS << '\n'; } +bool MCSectionMachO::UseCodeAlign() const { + return hasAttribute(MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS); +} + +bool MCSectionMachO::isVirtualSection() const { + return (getType() == MCSectionMachO::S_ZEROFILL || + getType() == MCSectionMachO::S_GB_ZEROFILL || + getType() == MCSectionMachO::S_THREAD_LOCAL_ZEROFILL); +} + /// StripSpaces - This removes leading and trailing spaces from the StringRef. static void StripSpaces(StringRef &Str) { while (!Str.empty() && isspace(Str[0])) @@ -168,12 +179,12 @@ std::string MCSectionMachO::ParseSectionSpecifier(StringRef Spec, // In. 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); @@ -182,14 +193,14 @@ std::string MCSectionMachO::ParseSectionSpecifier(StringRef Spec, // In. 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 " @@ -200,25 +211,25 @@ std::string MCSectionMachO::ParseSectionSpecifier(StringRef Spec, // In. 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; @@ -235,10 +246,10 @@ std::string MCSectionMachO::ParseSectionSpecifier(StringRef Spec, // In. // 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); @@ -247,14 +258,14 @@ std::string MCSectionMachO::ParseSectionSpecifier(StringRef Spec, // In. for (unsigned i = 0; ; ++i) { if (SectionAttrDescriptors[i].AttrFlag == AttrFlagEnd) 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('+'); }; @@ -272,15 +283,14 @@ std::string MCSectionMachO::ParseSectionSpecifier(StringRef Spec, // In. 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 stub size from a string to an integer. if (StubSizeStr.getAsInteger(0, StubSize)) return "mach-o section specifier has a malformed stub size"; - + return ""; } - |
