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/MCAssembler.h"
11 #include "llvm/MC/MCSymbolELF.h"
12 #include "llvm/MC/MCFixupKindInfo.h"
13 #include "llvm/Support/ELF.h"
19 // Shift value for STT_* flags. 7 possible values. 3 bits.
22 // Shift value for STB_* flags. 4 possible values, 2 bits.
25 // Shift value for STV_* flags. 4 possible values, 2 bits.
28 // Shift value for STO_* flags. 3 bits. All the values are between 0x20 and
29 // 0xe0, so we shift right by 5 before storing.
33 ELF_IsSignature_Shift = 10,
36 ELF_WeakrefUsedInReloc_Shift = 11,
39 ELF_BindingSet_Shift = 12
43 void MCSymbolELF::setBinding(unsigned Binding) const {
45 if (getType() == ELF::STT_SECTION && Binding != ELF::STB_LOCAL)
46 setType(ELF::STT_NOTYPE);
50 llvm_unreachable("Unsupported Binding");
60 case ELF::STB_GNU_UNIQUE:
64 uint32_t OtherFlags = getFlags() & ~(0x3 << ELF_STB_Shift);
65 setFlags(OtherFlags | (Val << ELF_STB_Shift));
68 unsigned MCSymbolELF::getBinding() const {
70 uint32_t Val = (getFlags() & (0x3 << ELF_STB_Shift)) >> ELF_STB_Shift;
73 llvm_unreachable("Invalid value");
75 return ELF::STB_LOCAL;
77 return ELF::STB_GLOBAL;
81 return ELF::STB_GNU_UNIQUE;
86 return ELF::STB_LOCAL;
88 return ELF::STB_GLOBAL;
89 if (isWeakrefUsedInReloc())
92 return ELF::STB_LOCAL;
93 return ELF::STB_GLOBAL;
96 void MCSymbolELF::setType(unsigned Type) const {
98 if (Type == ELF::STT_SECTION && getBinding() != ELF::STB_LOCAL)
102 llvm_unreachable("Unsupported Binding");
103 case ELF::STT_NOTYPE:
106 case ELF::STT_OBJECT:
112 case ELF::STT_SECTION:
115 case ELF::STT_COMMON:
121 case ELF::STT_GNU_IFUNC:
125 uint32_t OtherFlags = getFlags() & ~(0x7 << ELF_STT_Shift);
126 setFlags(OtherFlags | (Val << ELF_STT_Shift));
129 unsigned MCSymbolELF::getType() const {
130 uint32_t Val = (getFlags() & (0x7 << ELF_STT_Shift)) >> ELF_STT_Shift;
133 llvm_unreachable("Invalid value");
135 return ELF::STT_NOTYPE;
137 return ELF::STT_OBJECT;
139 return ELF::STT_FUNC;
141 return ELF::STT_SECTION;
143 return ELF::STT_COMMON;
147 return ELF::STT_GNU_IFUNC;
151 void MCSymbolELF::setVisibility(unsigned Visibility) {
152 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
153 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
155 uint32_t OtherFlags = getFlags() & ~(0x3 << ELF_STV_Shift);
156 setFlags(OtherFlags | (Visibility << ELF_STV_Shift));
159 unsigned MCSymbolELF::getVisibility() const {
160 unsigned Visibility = (getFlags() & (0x3 << ELF_STV_Shift)) >> ELF_STV_Shift;
161 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
162 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
166 void MCSymbolELF::setOther(unsigned Other) {
167 assert((Other & 0x1f) == 0);
169 assert(Other <= 0x7);
170 uint32_t OtherFlags = getFlags() & ~(0x7 << ELF_STO_Shift);
171 setFlags(OtherFlags | (Other << ELF_STO_Shift));
174 unsigned MCSymbolELF::getOther() const {
175 unsigned Other = (getFlags() & (0x7 << ELF_STO_Shift)) >> ELF_STO_Shift;
179 void MCSymbolELF::setIsWeakrefUsedInReloc() const {
180 uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_WeakrefUsedInReloc_Shift);
181 setFlags(OtherFlags | (1 << ELF_WeakrefUsedInReloc_Shift));
184 bool MCSymbolELF::isWeakrefUsedInReloc() const {
185 return getFlags() & (0x1 << ELF_WeakrefUsedInReloc_Shift);
188 void MCSymbolELF::setIsSignature() const {
189 uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_IsSignature_Shift);
190 setFlags(OtherFlags | (1 << ELF_IsSignature_Shift));
193 bool MCSymbolELF::isSignature() const {
194 return getFlags() & (0x1 << ELF_IsSignature_Shift);
197 void MCSymbolELF::setIsBindingSet() const {
198 uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_BindingSet_Shift);
199 setFlags(OtherFlags | (1 << ELF_BindingSet_Shift));
202 bool MCSymbolELF::isBindingSet() const {
203 return getFlags() & (0x1 << ELF_BindingSet_Shift);