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split MachO section handling stuff out to its out .h/.cpp file.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78576 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-08-10 18:15:01 +00:00
parent e15c2d7ce5
commit f9bdeddb96
12 changed files with 462 additions and 429 deletions
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153
include/llvm/MC/MCSection.h
View File

@ -67,159 +67,6 @@ namespace llvm {
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;

175
include/llvm/MC/MCSectionMachO.h Normal file
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@ -0,0 +1,175 @@
//===- 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

1
lib/MC/CMakeLists.txt
View File

@ -4,6 +4,7 @@ add_llvm_library(LLVMMC
MCAsmStreamer.cpp
MCContext.cpp
MCSection.cpp
MCSectionMachO.cpp
MCStreamer.cpp
TargetAsmParser.cpp
)

2
lib/MC/MCAsmStreamer.cpp
View File

@ -11,7 +11,7 @@
#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"

269
lib/MC/MCSection.cpp
View File

@ -111,275 +111,6 @@ void MCSectionELF::PrintSwitchToSection(const TargetAsmInfo &TAI,
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

279
lib/MC/MCSectionMachO.cpp Normal file
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@ -0,0 +1,279 @@
//===- 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 "";
}

2
lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
View File

@ -26,7 +26,7 @@
#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"

2
lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp
View File

@ -31,7 +31,7 @@
#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"

2
lib/Target/TargetLoweringObjectFile.cpp
View File

@ -17,7 +17,7 @@
#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"

2
lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.cpp
View File

@ -28,7 +28,7 @@
#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"

2
tools/llvm-mc/AsmParser.cpp
View File

@ -17,7 +17,7 @@
#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"

2
tools/llvm-mc/llvm-mc.cpp
View File

@ -13,7 +13,7 @@
//===----------------------------------------------------------------------===//
#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"