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Split Writer::assignAddresses. NFC.

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llvm-svn: 256449
This commit is contained in:
Rui Ueyama 2015-12-26 10:52:26 +00:00
parent 5a4ae1f584
commit 1a311f1da6
1 changed files with 19 additions and 12 deletions
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31
lld/ELF/Writer.cpp
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@ -55,6 +55,7 @@ private:
void updateRelro(Elf_Phdr *Cur, Elf_Phdr *GnuRelroPhdr, uintX_t VA);
void assignAddresses();
void buildSectionMap();
void fixAbsoluteSymbols();
void openFile(StringRef OutputPath);
void writeHeader();
void writeSections();
@ -154,6 +155,7 @@ template <class ELFT> void Writer<ELFT>::run() {
addReservedSymbols();
createSections();
assignAddresses();
fixAbsoluteSymbols();
openFile(Config->OutputFile);
writeHeader();
writeSections();
@ -1110,18 +1112,6 @@ template <class ELFT> void Writer<ELFT>::assignAddresses() {
// Update "_end" and "end" symbols so that they
// point to the end of the data segment.
ElfSym<ELFT>::End.st_value = VA;
// Update __rel_iplt_start/__rel_iplt_end to wrap the
// rela.plt section.
if (Out<ELFT>::RelaPlt) {
uintX_t Start = Out<ELFT>::RelaPlt->getVA();
ElfSym<ELFT>::RelaIpltStart.st_value = Start;
ElfSym<ELFT>::RelaIpltEnd.st_value = Start + Out<ELFT>::RelaPlt->getSize();
}
// Update MIPS _gp absolute symbol so that it points to the static data.
if (Config->EMachine == EM_MIPS)
ElfSym<ELFT>::MipsGp.st_value = getMipsGpAddr<ELFT>();
}
// Returns the number of PHDR entries.
@ -1176,6 +1166,23 @@ static typename ELFFile<ELFT>::uintX_t getEntryAddr() {
return 0;
}
// This function is called after we have assigned address and size
// to each section. This function fixes some predefined absolute
// symbol values that depend on section address and size.
template <class ELFT> void Writer<ELFT>::fixAbsoluteSymbols() {
// Update __rel[a]_iplt_{start,end} symbols so that they point
// to beginning or ending of .rela.plt section, respectively.
if (Out<ELFT>::RelaPlt) {
uintX_t Start = Out<ELFT>::RelaPlt->getVA();
ElfSym<ELFT>::RelaIpltStart.st_value = Start;
ElfSym<ELFT>::RelaIpltEnd.st_value = Start + Out<ELFT>::RelaPlt->getSize();
}
// Update MIPS _gp absolute symbol so that it points to the static data.
if (Config->EMachine == EM_MIPS)
ElfSym<ELFT>::MipsGp.st_value = getMipsGpAddr<ELFT>();
}
template <class ELFT> void Writer<ELFT>::writeHeader() {
uint8_t *Buf = Buffer->getBufferStart();
memcpy(Buf, "\177ELF", 4);