raw_ostream &OS) const;
};
-
- /// 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 {
- 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.
- unsigned TypeAndAttributes;
-
- /// Reserved2 - The 'reserved2' field of a section, used to represent the
- /// size of stubs, for example.
- unsigned Reserved2;
-
- MCSectionMachO(const StringRef &Segment, const StringRef &Section,
- unsigned TAA, unsigned reserved2, SectionKind K)
- : MCSection(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;
-
- if (i < Section.size())
- SectionName[i] = Section[i];
- else
- SectionName[i] = 0;
- }
- }
- public:
-
- static MCSectionMachO *Create(const StringRef &Segment,
- const StringRef &Section,
- unsigned TypeAndAttributes,
- unsigned Reserved2,
- SectionKind K, MCContext &Ctx);
-
- /// 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_SYMBOL_STUBS - Section with only function pointers for
- /// initialization.
- S_MOD_INIT_FUNC_POINTERS = 0x09U,
- /// S_MOD_INIT_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,
-
- LAST_KNOWN_SECTION_TYPE = S_LAZY_DYLIB_SYMBOL_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])
- return StringRef(SegmentName, 16);
- return StringRef(SegmentName);
- }
- StringRef getSectionName() const {
- // SectionName is not necessarily null terminated!
- if (SectionName[15])
- return StringRef(SectionName, 16);
- return StringRef(SectionName);
- }
-
- unsigned getTypeAndAttributes() const { return TypeAndAttributes; }
-
-
- /// 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.
- static std::string ParseSectionSpecifier(StringRef Spec, // In.
- StringRef &Segment, // Out.
- StringRef &Section, // Out.
- unsigned &TAA, // Out.
- unsigned &StubSize); // Out.
-
- virtual void PrintSwitchToSection(const TargetAsmInfo &TAI,
- raw_ostream &OS) const;
- };
-
class MCSectionCOFF : public MCSection {
std::string Name;
--- /dev/null
+//===- MCSectionMachO.h - MachO Machine Code Sections -----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the MCSectionMachO class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCSECTIONMACHO_H
+#define LLVM_MC_MCSECTIONMACHO_H
+
+#include "llvm/MC/MCSection.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 {
+ 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.
+ unsigned TypeAndAttributes;
+
+ /// Reserved2 - The 'reserved2' field of a section, used to represent the
+ /// size of stubs, for example.
+ unsigned Reserved2;
+
+ MCSectionMachO(const StringRef &Segment, const StringRef &Section,
+ unsigned TAA, unsigned reserved2, SectionKind K)
+ : MCSection(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;
+
+ if (i < Section.size())
+ SectionName[i] = Section[i];
+ else
+ SectionName[i] = 0;
+ }
+ }
+public:
+
+ static MCSectionMachO *Create(const StringRef &Segment,
+ const StringRef &Section,
+ unsigned TypeAndAttributes,
+ unsigned Reserved2,
+ SectionKind K, MCContext &Ctx);
+
+ /// 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_SYMBOL_STUBS - Section with only function pointers for
+ /// initialization.
+ S_MOD_INIT_FUNC_POINTERS = 0x09U,
+ /// S_MOD_INIT_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,
+
+ LAST_KNOWN_SECTION_TYPE = S_LAZY_DYLIB_SYMBOL_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])
+ return StringRef(SegmentName, 16);
+ return StringRef(SegmentName);
+ }
+ StringRef getSectionName() const {
+ // SectionName is not necessarily null terminated!
+ if (SectionName[15])
+ return StringRef(SectionName, 16);
+ return StringRef(SectionName);
+ }
+
+ unsigned getTypeAndAttributes() const { return TypeAndAttributes; }
+
+
+ /// 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.
+ static std::string ParseSectionSpecifier(StringRef Spec, // In.
+ StringRef &Segment, // Out.
+ StringRef &Section, // Out.
+ unsigned &TAA, // Out.
+ unsigned &StubSize); // Out.
+
+ virtual void PrintSwitchToSection(const TargetAsmInfo &TAI,
+ raw_ostream &OS) const;
+};
+
+} // end namespace llvm
+
+#endif
MCAsmStreamer.cpp
MCContext.cpp
MCSection.cpp
+ MCSectionMachO.cpp
MCStreamer.cpp
TargetAsmParser.cpp
)
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/ErrorHandling.h"
OS << '\n';
}
-//===----------------------------------------------------------------------===//
-// 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;
- }
-
- 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;
- 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 = '+';
- }
-
- 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);
-}
-
-/// 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('+');
- };
-
- // 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 "";
- }
-
- // 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 "";
-}
-
//===----------------------------------------------------------------------===//
// MCSectionCOFF
--- /dev/null
+//===- lib/MC/MCSectionMachO.cpp - MachO 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/MCSectionMachO.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+/// 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;
+ }
+
+ 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;
+ 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 = '+';
+ }
+
+ 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);
+}
+
+/// 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('+');
+ };
+
+ // 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 "";
+ }
+
+ // 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 "";
+}
+
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/DerivedTypes.h"
#include "llvm/GlobalVariable.h"
#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/SourceMgr.h"
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/Support/CommandLine.h"
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