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[Mips] Add support for MCJIT for MIPS32r6

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Add support for resolving MIPS32r6 relocations in MCJIT.

Patch by Vladimir Radosavljevic.

Differential Revision: http://reviews.llvm.org/D10687


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241442 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Petar Jovanovic
2015-07-06 12:50:55 +00:00
parent a25ee390b5
commit d095a756cc
3 changed files with 112 additions and 3 deletions
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61
lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
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@@ -511,11 +511,54 @@ void RuntimeDyldELF::resolveMIPSRelocation(const SectionEntry &Section,
Insn |= Value & 0xffff;
writeBytesUnaligned(Insn, TargetPtr, 4);
break;
case ELF::R_MIPS_PC32:
case ELF::R_MIPS_PC32: {
uint32_t FinalAddress = (Section.LoadAddress + Offset);
writeBytesUnaligned(Value + Addend - FinalAddress, (uint8_t *)TargetPtr, 4);
writeBytesUnaligned(Value - FinalAddress, (uint8_t *)TargetPtr, 4);
break;
}
case ELF::R_MIPS_PC16: {
uint32_t FinalAddress = (Section.LoadAddress + Offset);
Insn &= 0xffff0000;
Insn |= ((Value - FinalAddress) >> 2) & 0xffff;
writeBytesUnaligned(Insn, TargetPtr, 4);
break;
}
case ELF::R_MIPS_PC19_S2: {
uint32_t FinalAddress = (Section.LoadAddress + Offset);
Insn &= 0xfff80000;
Insn |= ((Value - (FinalAddress & ~0x3)) >> 2) & 0x7ffff;
writeBytesUnaligned(Insn, TargetPtr, 4);
break;
}
case ELF::R_MIPS_PC21_S2: {
uint32_t FinalAddress = (Section.LoadAddress + Offset);
Insn &= 0xffe00000;
Insn |= ((Value - FinalAddress) >> 2) & 0x1fffff;
writeBytesUnaligned(Insn, TargetPtr, 4);
break;
}
case ELF::R_MIPS_PC26_S2: {
uint32_t FinalAddress = (Section.LoadAddress + Offset);
Insn &= 0xfc000000;
Insn |= ((Value - FinalAddress) >> 2) & 0x3ffffff;
writeBytesUnaligned(Insn, TargetPtr, 4);
break;
}
case ELF::R_MIPS_PCHI16: {
uint32_t FinalAddress = (Section.LoadAddress + Offset);
Insn &= 0xffff0000;
Insn |= ((Value - FinalAddress + 0x8000) >> 16) & 0xffff;
writeBytesUnaligned(Insn, TargetPtr, 4);
break;
}
case ELF::R_MIPS_PCLO16: {
uint32_t FinalAddress = (Section.LoadAddress + Offset);
Insn &= 0xffff0000;
Insn |= (Value - FinalAddress) & 0xffff;
writeBytesUnaligned(Insn, TargetPtr, 4);
break;
}
}
}
void RuntimeDyldELF::setMipsABI(const ObjectFile &Obj) {
@@ -1263,12 +1306,24 @@ relocation_iterator RuntimeDyldELF::processRelocationRef(
Section.StubOffset += getMaxStubSize();
}
} else {
if (RelType == ELF::R_MIPS_HI16)
// FIXME: Calculate correct addends for R_MIPS_HI16, R_MIPS_LO16,
// R_MIPS_PCHI16 and R_MIPS_PCLO16 relocations.
if (RelType == ELF::R_MIPS_HI16 || RelType == ELF::R_MIPS_PCHI16)
Value.Addend += (Opcode & 0x0000ffff) << 16;
else if (RelType == ELF::R_MIPS_LO16)
Value.Addend += (Opcode & 0x0000ffff);
else if (RelType == ELF::R_MIPS_32)
Value.Addend += Opcode;
else if (RelType == ELF::R_MIPS_PCLO16)
Value.Addend += SignExtend32<16>((Opcode & 0x0000ffff));
else if (RelType == ELF::R_MIPS_PC16)
Value.Addend += SignExtend32<18>((Opcode & 0x0000ffff) << 2);
else if (RelType == ELF::R_MIPS_PC19_S2)
Value.Addend += SignExtend32<21>((Opcode & 0x0007ffff) << 2);
else if (RelType == ELF::R_MIPS_PC21_S2)
Value.Addend += SignExtend32<23>((Opcode & 0x001fffff) << 2);
else if (RelType == ELF::R_MIPS_PC26_S2)
Value.Addend += SignExtend32<28>((Opcode & 0x03ffffff) << 2);
processSimpleRelocation(SectionID, Offset, RelType, Value);
}
} else if (IsMipsN64ABI) {