1 //===- lib/MC/MCELF.cpp - MC ELF ------------------------------------------===//
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 // This file implements ELF object file writer information.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/MC/MCELF.h"
15 #include "llvm/MC/MCAssembler.h"
16 #include "llvm/MC/MCELFSymbolFlags.h"
17 #include "llvm/MC/MCFixupKindInfo.h"
18 #include "llvm/Support/ELF.h"
22 void MCELF::SetBinding(MCSymbolData &SD, unsigned Binding) {
23 assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
24 Binding == ELF::STB_WEAK);
25 uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift);
26 SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift));
29 unsigned MCELF::GetBinding(const MCSymbolData &SD) {
30 uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift;
31 assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
32 Binding == ELF::STB_WEAK);
36 void MCELF::SetType(MCSymbolData &SD, unsigned Type) {
37 assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
38 Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
39 Type == ELF::STT_COMMON || Type == ELF::STT_TLS ||
40 Type == ELF::STT_GNU_IFUNC);
42 uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STT_Shift);
43 SD.setFlags(OtherFlags | (Type << ELF_STT_Shift));
46 unsigned MCELF::GetType(const MCSymbolData &SD) {
47 uint32_t Type = (SD.getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift;
48 assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
49 Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
50 Type == ELF::STT_COMMON || Type == ELF::STT_TLS || Type == ELF::STT_GNU_IFUNC);
54 // Visibility is stored in the first two bits of st_other
55 // st_other values are stored in the second byte of get/setFlags
56 void MCELF::SetVisibility(MCSymbolData &SD, unsigned Visibility) {
57 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
58 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
60 uint32_t OtherFlags = SD.getFlags() & ~(0x3 << ELF_STV_Shift);
61 SD.setFlags(OtherFlags | (Visibility << ELF_STV_Shift));
64 unsigned MCELF::GetVisibility(MCSymbolData &SD) {
66 (SD.getFlags() & (0x3 << ELF_STV_Shift)) >> ELF_STV_Shift;
67 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
68 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
72 // Other is stored in the last six bits of st_other
73 // st_other values are stored in the second byte of get/setFlags
74 void MCELF::setOther(MCSymbolData &SD, unsigned Other) {
75 uint32_t OtherFlags = SD.getFlags() & ~(0x3f << ELF_STO_Shift);
76 SD.setFlags(OtherFlags | (Other << ELF_STO_Shift));
79 unsigned MCELF::getOther(MCSymbolData &SD) {
81 (SD.getFlags() & (0x3f << ELF_STO_Shift)) >> ELF_STO_Shift;