#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
{ "interposing", "S_INTERPOSING" }, // 0x0D
{ "16byte_literals", "S_16BYTE_LITERALS" }, // 0x0E
{ 0, /*FIXME??*/ "S_DTRACE_DOF" }, // 0x0F
- { 0, /*FIXME??*/ "S_LAZY_DYLIB_SYMBOL_POINTERS" } // 0x10
+ { 0, /*FIXME??*/ "S_LAZY_DYLIB_SYMBOL_POINTERS" }, // 0x10
+ { "thread_local_regular", "S_THREAD_LOCAL_REGULAR" }, // 0x11
+ { "thread_local_zerofill", "S_THREAD_LOCAL_ZEROFILL" }, // 0x12
+ { "thread_local_variables", "S_THREAD_LOCAL_VARIABLES" }, // 0x13
+ { "thread_local_variable_pointers",
+ "S_THREAD_LOCAL_VARIABLE_POINTERS" }, // 0x14
+ { "thread_local_init_function_pointers",
+ "S_THREAD_LOCAL_INIT_FUNCTION_POINTERS"}, // 0x15
};
{ AttrFlagEnd, 0, 0 }
};
+MCSectionMachO::MCSectionMachO(StringRef Segment, StringRef Section,
+ unsigned TAA, unsigned reserved2, SectionKind K)
+ : MCSection(SV_MachO, K), TypeAndAttributes(TAA), Reserved2(reserved2) {
+ assert(Segment.size() <= 16 && Section.size() <= 16 &&
+ "Segment or section string too long");
+ for (unsigned i = 0; i != 16; ++i) {
+ if (i < Segment.size())
+ SegmentName[i] = Segment[i];
+ else
+ SegmentName[i] = 0;
-MCSectionMachO *MCSectionMachO::
-Create(StringRef Segment, 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);
+ 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) {
return;
}
- OS << ',';
-
unsigned SectionType = TAA & MCSectionMachO::SECTION_TYPE;
assert(SectionType <= MCSectionMachO::LAST_KNOWN_SECTION_TYPE &&
"Invalid SectionType specified!");
- if (SectionTypeDescriptors[SectionType].AssemblerName)
+ if (SectionTypeDescriptors[SectionType].AssemblerName) {
+ OS << ',';
OS << SectionTypeDescriptors[SectionType].AssemblerName;
- else
- OS << "<<" << SectionTypeDescriptors[SectionType].EnumName << ">>";
-
+ } else {
+ // If we have no name for the attribute, stop here.
+ OS << '\n';
+ return;
+ }
+
// If we don't have any attributes, we're done.
unsigned SectionAttrs = TAA & MCSectionMachO::SECTION_ATTRIBUTES;
if (SectionAttrs == 0) {
// Check each attribute to see if we have it.
char Separator = ',';
- for (unsigned i = 0; SectionAttrDescriptors[i].AttrFlag; ++i) {
+ for (unsigned i = 0;
+ SectionAttrs != 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;
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]))
StringRef &Segment, // Out.
StringRef &Section, // Out.
unsigned &TAA, // Out.
+ bool &TAAParsed, // Out.
unsigned &StubSize) { // Out.
+ TAAParsed = false;
// 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);
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 "
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;
+ TAAParsed = true;
// If we have no comma after the section type, there are no attributes.
if (Comma.second.empty()) {
// 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);
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('+');
};
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 "";
}
-
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