/usr/include/llvm-3.9/llvm/MC/MCSymbolMachO.h is in llvm-3.9-dev 1:3.9.1-19ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | //===- MCSymbolMachO.h - ---------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCSYMBOLMACHO_H
#define LLVM_MC_MCSYMBOLMACHO_H
#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCSymbol.h"
namespace llvm {
class MCSymbolMachO : public MCSymbol {
/// \brief We store the value for the 'desc' symbol field in the
/// lowest 16 bits of the implementation defined flags.
enum MachOSymbolFlags : uint16_t { // See <mach-o/nlist.h>.
SF_DescFlagsMask = 0xFFFF,
// Reference type flags.
SF_ReferenceTypeMask = 0x0007,
SF_ReferenceTypeUndefinedNonLazy = 0x0000,
SF_ReferenceTypeUndefinedLazy = 0x0001,
SF_ReferenceTypeDefined = 0x0002,
SF_ReferenceTypePrivateDefined = 0x0003,
SF_ReferenceTypePrivateUndefinedNonLazy = 0x0004,
SF_ReferenceTypePrivateUndefinedLazy = 0x0005,
// Other 'desc' flags.
SF_ThumbFunc = 0x0008,
SF_NoDeadStrip = 0x0020,
SF_WeakReference = 0x0040,
SF_WeakDefinition = 0x0080,
SF_SymbolResolver = 0x0100,
SF_AltEntry = 0x0200,
// Common alignment
SF_CommonAlignmentMask = 0xF0FF,
SF_CommonAlignmentShift = 8
};
public:
MCSymbolMachO(const StringMapEntry<bool> *Name, bool isTemporary)
: MCSymbol(SymbolKindMachO, Name, isTemporary) {}
// Reference type methods.
void clearReferenceType() const {
modifyFlags(0, SF_ReferenceTypeMask);
}
void setReferenceTypeUndefinedLazy(bool Value) const {
modifyFlags(Value ? SF_ReferenceTypeUndefinedLazy : 0,
SF_ReferenceTypeUndefinedLazy);
}
// Other 'desc' methods.
void setThumbFunc() const {
modifyFlags(SF_ThumbFunc, SF_ThumbFunc);
}
bool isNoDeadStrip() const {
return getFlags() & SF_NoDeadStrip;
}
void setNoDeadStrip() const {
modifyFlags(SF_NoDeadStrip, SF_NoDeadStrip);
}
bool isWeakReference() const {
return getFlags() & SF_WeakReference;
}
void setWeakReference() const {
modifyFlags(SF_WeakReference, SF_WeakReference);
}
bool isWeakDefinition() const {
return getFlags() & SF_WeakDefinition;
}
void setWeakDefinition() const {
modifyFlags(SF_WeakDefinition, SF_WeakDefinition);
}
bool isSymbolResolver() const {
return getFlags() & SF_SymbolResolver;
}
void setSymbolResolver() const {
modifyFlags(SF_SymbolResolver, SF_SymbolResolver);
}
void setAltEntry() const {
modifyFlags(SF_AltEntry, SF_AltEntry);
}
bool isAltEntry() const {
return getFlags() & SF_AltEntry;
}
void setDesc(unsigned Value) const {
assert(Value == (Value & SF_DescFlagsMask) &&
"Invalid .desc value!");
setFlags(Value & SF_DescFlagsMask);
}
/// \brief Get the encoded value of the flags as they will be emitted in to
/// the MachO binary
uint16_t getEncodedFlags(bool EncodeAsAltEntry) const {
uint16_t Flags = getFlags();
// Common alignment is packed into the 'desc' bits.
if (isCommon()) {
if (unsigned Align = getCommonAlignment()) {
unsigned Log2Size = Log2_32(Align);
assert((1U << Log2Size) == Align && "Invalid 'common' alignment!");
if (Log2Size > 15)
report_fatal_error("invalid 'common' alignment '" +
Twine(Align) + "' for '" + getName() + "'",
false);
Flags = (Flags & SF_CommonAlignmentMask) |
(Log2Size << SF_CommonAlignmentShift);
}
}
if (EncodeAsAltEntry)
Flags |= SF_AltEntry;
return Flags;
}
static bool classof(const MCSymbol *S) { return S->isMachO(); }
};
}
#endif
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