annotate lib/MC/MCELF.cpp @ 15:66597e792247

minor fix
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 17 Sep 2013 21:32:34 +0900
parents 9ad51c7bc036
children
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1 //===- lib/MC/MCELF.cpp - MC ELF ------------------------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file implements ELF object file writer information.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "llvm/MC/MCELF.h"
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15 #include "llvm/MC/MCAssembler.h"
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16 #include "llvm/MC/MCELFSymbolFlags.h"
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17 #include "llvm/MC/MCFixupKindInfo.h"
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18 #include "llvm/Support/ELF.h"
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19
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20 namespace llvm {
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21
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22 void MCELF::SetBinding(MCSymbolData &SD, unsigned Binding) {
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23 assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
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24 Binding == ELF::STB_WEAK);
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25 uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift);
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26 SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift));
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27 }
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29 unsigned MCELF::GetBinding(const MCSymbolData &SD) {
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30 uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift;
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31 assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
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32 Binding == ELF::STB_WEAK);
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33 return Binding;
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34 }
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35
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36 void MCELF::SetType(MCSymbolData &SD, unsigned Type) {
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37 assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
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38 Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
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39 Type == ELF::STT_FILE || Type == ELF::STT_COMMON ||
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40 Type == ELF::STT_TLS || Type == ELF::STT_GNU_IFUNC);
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41
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42 uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STT_Shift);
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43 SD.setFlags(OtherFlags | (Type << ELF_STT_Shift));
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44 }
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45
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46 unsigned MCELF::GetType(const MCSymbolData &SD) {
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47 uint32_t Type = (SD.getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift;
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48 assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
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49 Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
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50 Type == ELF::STT_FILE || Type == ELF::STT_COMMON ||
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51 Type == ELF::STT_TLS || Type == ELF::STT_GNU_IFUNC);
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52 return Type;
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53 }
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54
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55 // Visibility is stored in the first two bits of st_other
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56 // st_other values are stored in the second byte of get/setFlags
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57 void MCELF::SetVisibility(MCSymbolData &SD, unsigned Visibility) {
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58 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
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59 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
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60
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61 uint32_t OtherFlags = SD.getFlags() & ~(0x3 << ELF_STV_Shift);
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62 SD.setFlags(OtherFlags | (Visibility << ELF_STV_Shift));
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63 }
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64
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65 unsigned MCELF::GetVisibility(MCSymbolData &SD) {
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66 unsigned Visibility =
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67 (SD.getFlags() & (0x3 << ELF_STV_Shift)) >> ELF_STV_Shift;
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68 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
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69 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
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70 return Visibility;
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71 }
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72
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73 // Other is stored in the last six bits of st_other
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74 // st_other values are stored in the second byte of get/setFlags
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75 void MCELF::setOther(MCSymbolData &SD, unsigned Other) {
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76 uint32_t OtherFlags = SD.getFlags() & ~(0x3f << ELF_Other_Shift);
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77 SD.setFlags(OtherFlags | (Other << ELF_Other_Shift));
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78 }
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79
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80 unsigned MCELF::getOther(MCSymbolData &SD) {
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81 unsigned Other =
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82 (SD.getFlags() & (0x3f << ELF_Other_Shift)) >> ELF_Other_Shift;
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83 return Other;
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84 }
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85
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86 }