#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCSection.h"
+#include "llvm/Support/MachO.h"
namespace llvm {
-/// MCSectionMachO - This represents a section on a Mach-O system (used by
-/// Mac OS X). On a Mac system, these are also described in
-/// /usr/include/mach-o/loader.h.
-class MCSectionMachO : public MCSection {
+/// This represents a section on a Mach-O system (used by Mac OS X). On a Mac
+/// system, these are also described in /usr/include/mach-o/loader.h.
+class MCSectionMachO final : public MCSection {
char SegmentName[16]; // Not necessarily null terminated!
char SectionName[16]; // Not necessarily null terminated!
- /// TypeAndAttributes - This is the SECTION_TYPE and SECTION_ATTRIBUTES
- /// field of a section, drawn from the enums below.
+ /// This is the SECTION_TYPE and SECTION_ATTRIBUTES field of a section, drawn
+ /// from the enums below.
unsigned TypeAndAttributes;
- /// Reserved2 - The 'reserved2' field of a section, used to represent the
- /// size of stubs, for example.
+ /// The 'reserved2' field of a section, used to represent the size of stubs,
+ /// for example.
unsigned Reserved2;
- MCSectionMachO(StringRef Segment, StringRef Section,
- unsigned TAA, unsigned reserved2, SectionKind K);
+ MCSectionMachO(StringRef Segment, StringRef Section, unsigned TAA,
+ unsigned reserved2, SectionKind K, MCSymbol *Begin);
friend class MCContext;
public:
- /// These are the section type and attributes fields. A MachO section can
- /// have only one Type, but can have any of the attributes specified.
- enum {
- // TypeAndAttributes bitmasks.
- SECTION_TYPE = 0x000000FFU,
- SECTION_ATTRIBUTES = 0xFFFFFF00U,
-
- // Valid section types.
-
- /// S_REGULAR - Regular section.
- S_REGULAR = 0x00U,
- /// S_ZEROFILL - Zero fill on demand section.
- S_ZEROFILL = 0x01U,
- /// S_CSTRING_LITERALS - Section with literal C strings.
- S_CSTRING_LITERALS = 0x02U,
- /// S_4BYTE_LITERALS - Section with 4 byte literals.
- S_4BYTE_LITERALS = 0x03U,
- /// S_8BYTE_LITERALS - Section with 8 byte literals.
- S_8BYTE_LITERALS = 0x04U,
- /// S_LITERAL_POINTERS - Section with pointers to literals.
- S_LITERAL_POINTERS = 0x05U,
- /// S_NON_LAZY_SYMBOL_POINTERS - Section with non-lazy symbol pointers.
- S_NON_LAZY_SYMBOL_POINTERS = 0x06U,
- /// S_LAZY_SYMBOL_POINTERS - Section with lazy symbol pointers.
- S_LAZY_SYMBOL_POINTERS = 0x07U,
- /// S_SYMBOL_STUBS - Section with symbol stubs, byte size of stub in
- /// the Reserved2 field.
- S_SYMBOL_STUBS = 0x08U,
- /// S_MOD_INIT_FUNC_POINTERS - Section with only function pointers for
- /// initialization.
- S_MOD_INIT_FUNC_POINTERS = 0x09U,
- /// S_MOD_TERM_FUNC_POINTERS - Section with only function pointers for
- /// termination.
- S_MOD_TERM_FUNC_POINTERS = 0x0AU,
- /// S_COALESCED - Section contains symbols that are to be coalesced.
- S_COALESCED = 0x0BU,
- /// S_GB_ZEROFILL - Zero fill on demand section (that can be larger than 4
- /// gigabytes).
- S_GB_ZEROFILL = 0x0CU,
- /// S_INTERPOSING - Section with only pairs of function pointers for
- /// interposing.
- S_INTERPOSING = 0x0DU,
- /// S_16BYTE_LITERALS - Section with only 16 byte literals.
- S_16BYTE_LITERALS = 0x0EU,
- /// S_DTRACE_DOF - Section contains DTrace Object Format.
- S_DTRACE_DOF = 0x0FU,
- /// S_LAZY_DYLIB_SYMBOL_POINTERS - Section with lazy symbol pointers to
- /// lazy loaded dylibs.
- S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10U,
- /// S_THREAD_LOCAL_REGULAR - Section with ....
- S_THREAD_LOCAL_REGULAR = 0x11U,
- /// S_THREAD_LOCAL_ZEROFILL - Thread local zerofill section.
- S_THREAD_LOCAL_ZEROFILL = 0x12U,
- /// S_THREAD_LOCAL_VARIABLES - Section with thread local variable structure
- /// data.
- S_THREAD_LOCAL_VARIABLES = 0x13U,
- /// S_THREAD_LOCAL_VARIABLE_POINTERS - Section with ....
- S_THREAD_LOCAL_VARIABLE_POINTERS = 0x14U,
- /// S_THREAD_LOCAL_INIT_FUNCTION_POINTERS - Section with thread local
- /// variable initialization pointers to functions.
- S_THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15U,
-
- LAST_KNOWN_SECTION_TYPE = S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
-
-
- // Valid section attributes.
-
- /// S_ATTR_PURE_INSTRUCTIONS - Section contains only true machine
- /// instructions.
- S_ATTR_PURE_INSTRUCTIONS = 1U << 31,
- /// S_ATTR_NO_TOC - Section contains coalesced symbols that are not to be
- /// in a ranlib table of contents.
- S_ATTR_NO_TOC = 1U << 30,
- /// S_ATTR_STRIP_STATIC_SYMS - Ok to strip static symbols in this section
- /// in files with the MY_DYLDLINK flag.
- S_ATTR_STRIP_STATIC_SYMS = 1U << 29,
- /// S_ATTR_NO_DEAD_STRIP - No dead stripping.
- S_ATTR_NO_DEAD_STRIP = 1U << 28,
- /// S_ATTR_LIVE_SUPPORT - Blocks are live if they reference live blocks.
- S_ATTR_LIVE_SUPPORT = 1U << 27,
- /// S_ATTR_SELF_MODIFYING_CODE - Used with i386 code stubs written on by
- /// dyld.
- S_ATTR_SELF_MODIFYING_CODE = 1U << 26,
- /// S_ATTR_DEBUG - A debug section.
- S_ATTR_DEBUG = 1U << 25,
- /// S_ATTR_SOME_INSTRUCTIONS - Section contains some machine instructions.
- S_ATTR_SOME_INSTRUCTIONS = 1U << 10,
- /// S_ATTR_EXT_RELOC - Section has external relocation entries.
- S_ATTR_EXT_RELOC = 1U << 9,
- /// S_ATTR_LOC_RELOC - Section has local relocation entries.
- S_ATTR_LOC_RELOC = 1U << 8
- };
-
StringRef getSegmentName() const {
// SegmentName is not necessarily null terminated!
if (SegmentName[15])
unsigned getTypeAndAttributes() const { return TypeAndAttributes; }
unsigned getStubSize() const { return Reserved2; }
- unsigned getType() const { return TypeAndAttributes & SECTION_TYPE; }
+ MachO::SectionType getType() const {
+ return static_cast<MachO::SectionType>(TypeAndAttributes &
+ MachO::SECTION_TYPE);
+ }
bool hasAttribute(unsigned Value) const {
return (TypeAndAttributes & Value) != 0;
}
- /// 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.
- /// If no TAA was parsed, TAA is not altered, and TAAWasSet becomes false.
+ /// 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. If no TAA was parsed, TAA is not altered,
+ /// and TAAWasSet becomes false.
static std::string ParseSectionSpecifier(StringRef Spec, // In.
StringRef &Segment, // Out.
StringRef &Section, // Out.
bool &TAAParsed, // Out.
unsigned &StubSize); // Out.
- virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
- raw_ostream &OS) const;
- virtual bool UseCodeAlign() const;
- virtual bool isVirtualSection() const;
+ void PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS,
+ const MCExpr *Subsection) const override;
+ bool UseCodeAlign() const override;
+ bool isVirtualSection() const override;
static bool classof(const MCSection *S) {
return S->getVariant() == SV_MachO;
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