1 //===- lib/MC/MCSymbolELF.cpp ---------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCSymbolELF.h"
11 #include "llvm/BinaryFormat/ELF.h"
12 #include "llvm/MC/MCFixupKindInfo.h"
18 // Shift value for STT_* flags. 7 possible values. 3 bits.
21 // Shift value for STB_* flags. 4 possible values, 2 bits.
24 // Shift value for STV_* flags. 4 possible values, 2 bits.
27 // Shift value for STO_* flags. 3 bits. All the values are between 0x20 and
28 // 0xe0, so we shift right by 5 before storing.
32 ELF_IsSignature_Shift = 10,
35 ELF_WeakrefUsedInReloc_Shift = 11,
38 ELF_BindingSet_Shift = 12
42 void MCSymbolELF::setBinding(unsigned Binding) const {
44 if (getType() == ELF::STT_SECTION && Binding != ELF::STB_LOCAL)
45 setType(ELF::STT_NOTYPE);
49 llvm_unreachable("Unsupported Binding");
59 case ELF::STB_GNU_UNIQUE:
63 uint32_t OtherFlags = getFlags() & ~(0x3 << ELF_STB_Shift);
64 setFlags(OtherFlags | (Val << ELF_STB_Shift));
67 unsigned MCSymbolELF::getBinding() const {
69 uint32_t Val = (getFlags() & (0x3 << ELF_STB_Shift)) >> ELF_STB_Shift;
72 llvm_unreachable("Invalid value");
74 return ELF::STB_LOCAL;
76 return ELF::STB_GLOBAL;
80 return ELF::STB_GNU_UNIQUE;
85 return ELF::STB_LOCAL;
87 return ELF::STB_GLOBAL;
88 if (isWeakrefUsedInReloc())
91 return ELF::STB_LOCAL;
92 return ELF::STB_GLOBAL;
95 void MCSymbolELF::setType(unsigned Type) const {
97 if (Type == ELF::STT_SECTION && getBinding() != ELF::STB_LOCAL)
101 llvm_unreachable("Unsupported Binding");
102 case ELF::STT_NOTYPE:
105 case ELF::STT_OBJECT:
111 case ELF::STT_SECTION:
114 case ELF::STT_COMMON:
120 case ELF::STT_GNU_IFUNC:
124 uint32_t OtherFlags = getFlags() & ~(0x7 << ELF_STT_Shift);
125 setFlags(OtherFlags | (Val << ELF_STT_Shift));
128 unsigned MCSymbolELF::getType() const {
129 uint32_t Val = (getFlags() & (0x7 << ELF_STT_Shift)) >> ELF_STT_Shift;
132 llvm_unreachable("Invalid value");
134 return ELF::STT_NOTYPE;
136 return ELF::STT_OBJECT;
138 return ELF::STT_FUNC;
140 return ELF::STT_SECTION;
142 return ELF::STT_COMMON;
146 return ELF::STT_GNU_IFUNC;
150 void MCSymbolELF::setVisibility(unsigned Visibility) {
151 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
152 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
154 uint32_t OtherFlags = getFlags() & ~(0x3 << ELF_STV_Shift);
155 setFlags(OtherFlags | (Visibility << ELF_STV_Shift));
158 unsigned MCSymbolELF::getVisibility() const {
159 unsigned Visibility = (getFlags() & (0x3 << ELF_STV_Shift)) >> ELF_STV_Shift;
160 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
161 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
165 void MCSymbolELF::setOther(unsigned Other) {
166 assert((Other & 0x1f) == 0);
168 assert(Other <= 0x7);
169 uint32_t OtherFlags = getFlags() & ~(0x7 << ELF_STO_Shift);
170 setFlags(OtherFlags | (Other << ELF_STO_Shift));
173 unsigned MCSymbolELF::getOther() const {
174 unsigned Other = (getFlags() & (0x7 << ELF_STO_Shift)) >> ELF_STO_Shift;
178 void MCSymbolELF::setIsWeakrefUsedInReloc() const {
179 uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_WeakrefUsedInReloc_Shift);
180 setFlags(OtherFlags | (1 << ELF_WeakrefUsedInReloc_Shift));
183 bool MCSymbolELF::isWeakrefUsedInReloc() const {
184 return getFlags() & (0x1 << ELF_WeakrefUsedInReloc_Shift);
187 void MCSymbolELF::setIsSignature() const {
188 uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_IsSignature_Shift);
189 setFlags(OtherFlags | (1 << ELF_IsSignature_Shift));
192 bool MCSymbolELF::isSignature() const {
193 return getFlags() & (0x1 << ELF_IsSignature_Shift);
196 void MCSymbolELF::setIsBindingSet() const {
197 uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_BindingSet_Shift);
198 setFlags(OtherFlags | (1 << ELF_BindingSet_Shift));
201 bool MCSymbolELF::isBindingSet() const {
202 return getFlags() & (0x1 << ELF_BindingSet_Shift);