From c6ac7940d924f86ebb5701d1d55bd45b83851e37 Mon Sep 17 00:00:00 2001 From: Daniel Dunbar Date: Mon, 8 Mar 2010 21:10:39 +0000 Subject: MC/Mach-O: Error out instead of crashing on invalid scattered relocation expressions. llvm-svn: 97983 --- llvm/lib/MC/MCAssembler.cpp | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'llvm/lib/MC/MCAssembler.cpp') diff --git a/llvm/lib/MC/MCAssembler.cpp b/llvm/lib/MC/MCAssembler.cpp index 96227dbee50..3f40a6d6a4c 100644 --- a/llvm/lib/MC/MCAssembler.cpp +++ b/llvm/lib/MC/MCAssembler.cpp @@ -447,13 +447,22 @@ public: // See . const MCSymbol *A = Target.getSymA(); MCSymbolData *SD = SymbolMap.lookup(A); + + if (!SD->getFragment()) + llvm_report_error("symbol '" + A->getName() + + "' can not be undefined in a subtraction expression"); + uint32_t Value = SD->getFragment()->getAddress() + SD->getOffset(); uint32_t Value2 = 0; if (const MCSymbol *B = Target.getSymB()) { - Type = RIT_LocalDifference; - MCSymbolData *SD = SymbolMap.lookup(B); + + if (!SD->getFragment()) + llvm_report_error("symbol '" + B->getName() + + "' can not be undefined in a subtraction expression"); + + Type = RIT_LocalDifference; Value2 = SD->getFragment()->getAddress() + SD->getOffset(); } -- cgit v1.2.3