Fixed a bug where the disassembler would allow an immediate
argument that had to be between 0 and 7 to have any value,
firing an assert later in the AsmPrinter. Now, the
disassembler rejects instructions with out-of-range values
for that immediate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100694 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c b/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c
index db694bc..d6f48b7 100644
--- a/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c
+++ b/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c
@@ -1277,6 +1277,9 @@
case ENCODING_IB:
if (readImmediate(insn, 1))
return -1;
+ if (insn->spec->operands[index].type == TYPE_IMM3 &&
+ insn->immediates[insn->numImmediatesConsumed - 1] > 7)
+ return -1;
break;
case ENCODING_IW:
if (readImmediate(insn, 2))