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MIPS: Adding a check for JAL argument in PIC mode to prevent crashing on getExpr #120356

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Merged
merged 2 commits into from
Dec 23, 2024
Merged

MIPS: Adding a check for JAL argument in PIC mode to prevent crashing on getExpr #120356

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Adding a check for JAL argument in PIC mode to prevent crashing on ge…
parsifal-47 Dec 18, 2024
ec12ecd
Addressing review feedback
parsifal-47 Dec 20, 2024
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4 changes: 4 additions & 0 deletions llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2108,6 +2108,10 @@ bool MipsAsmParser::processInstruction(MCInst &Inst, SMLoc IDLoc,
if ((Opcode == Mips::JAL || Opcode == Mips::JAL_MM) && inPicMode()) {
warnIfNoMacro(IDLoc);

if (!Inst.getOperand(0).isExpr()) {
return Error(IDLoc, "unsupported constant in relocation");
}

const MCExpr *JalExpr = Inst.getOperand(0).getExpr();

// We can do this expansion if there's only 1 symbol in the argument
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