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-rw-r--r--src/arch/riscv/insts/standard.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/arch/riscv/insts/standard.cc b/src/arch/riscv/insts/standard.cc
index bcf0741f9..60cf4fc2b 100644
--- a/src/arch/riscv/insts/standard.cc
+++ b/src/arch/riscv/insts/standard.cc
@@ -60,7 +60,11 @@ CSROp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
ss << mnemonic << ' ' << registerName(_destRegIdx[0]) << ", ";
if (_numSrcRegs > 0)
ss << registerName(_srcRegIdx[0]) << ", ";
- ss << MiscRegNames.at(csr);
+ auto name = MiscRegNames.find(csr);
+ if (name != MiscRegNames.end())
+ ss << name->second;
+ else
+ ss << "?? (" << hex << "0x" << csr << ")";
return ss.str();
}