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[mips] Implement generation of relocations "chains" used by N32 ABI

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In case of using a "nested" relocation expressions like this
`%hi(%neg(%gp_rel()))`, N32 ABI requires generation of three consecutive
relocations. That differs from the N64 ABI case where all relocations
are packed into the single relocation record.

llvm-svn: 313879
This commit is contained in:
Simon Atanasyan
2017-09-21 14:04:53 +00:00
parent 9f676a7798
commit ede43b71f8
2 changed files with 39 additions and 0 deletions
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17
llvm/lib/MC/ELFObjectWriter.cpp
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@@ -1131,6 +1131,23 @@ void ELFObjectWriter::writeRelocations(const MCAssembler &Asm,
if (hasRelocationAddend())
write(uint32_t(Entry.Addend));
if (TargetObjectWriter->getEMachine() == ELF::EM_MIPS) {
if (uint32_t RType = TargetObjectWriter->getRType2(Entry.Type)) {
write(uint32_t(Entry.Offset));
ERE32.setSymbolAndType(0, RType);
write(ERE32.r_info);
write(uint32_t(0));
}
if (uint32_t RType = TargetObjectWriter->getRType3(Entry.Type)) {
write(uint32_t(Entry.Offset));
ERE32.setSymbolAndType(0, RType);
write(ERE32.r_info);
write(uint32_t(0));
}
}
}
}
}