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[MC] Detect out of range jumps further than 2^32 bytes

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On AArch64, object files may be greater than 2^32 bytes. If an
offset is greater than the max value of a 32-bit unsigned integer,
LLVM silently truncates the offset. Instead, make it return an
error.

Differential Revision: https://reviews.llvm.org/D153494
This commit is contained in:
Daniel Hoekwater 2023-06-22 03:56:14 +00:00
parent 16e1b8d6c0
commit d8cef4f8fa
1 changed files with 1 additions and 1 deletions
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llvm/lib/MC/MCAssembler.cpp
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@ -273,7 +273,7 @@ bool MCAssembler::evaluateFixup(const MCAsmLayout &Layout,
"FKF_IsAlignedDownTo32Bits is only allowed on PC-relative fixups!");
if (IsPCRel) {
uint32_t Offset = Layout.getFragmentOffset(DF) + Fixup.getOffset();
uint64_t Offset = Layout.getFragmentOffset(DF) + Fixup.getOffset();
// A number of ARM fixups in Thumb mode require that the effective PC
// address be determined as the 32-bit aligned version of the actual offset.