Add basic support for .cfi_personality.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122566 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index aac5535..cf11ca9 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -2206,6 +2206,29 @@
return getStreamer().EmitCFIOffset(Register, Offset);
}
+static bool isValidEncoding(int64_t Encoding) {
+ if (Encoding & ~0xff)
+ return false;
+
+ if (Encoding == dwarf::DW_EH_PE_omit)
+ return true;
+
+ const unsigned Format = Encoding & 0xf;
+ if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
+ Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
+ Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
+ Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
+ return false;
+
+ const unsigned Application = Encoding & 0xf0;
+ if (Application != dwarf::DW_EH_PE_absptr &&
+ Application != dwarf::DW_EH_PE_pcrel &&
+ Application != dwarf::DW_EH_PE_indirect)
+ return false;
+
+ return true;
+}
+
/// ParseDirectiveCFIPersonalityOrLsda
/// ::= .cfi_personality encoding, [symbol_name]
/// ::= .cfi_lsda encoding, [symbol_name]
@@ -2214,10 +2237,10 @@
int64_t Encoding = 0;
if (getParser().ParseAbsoluteExpression(Encoding))
return true;
- if (Encoding == 255)
+ if (Encoding == dwarf::DW_EH_PE_omit)
return false;
- if (Encoding != 0)
+ if (!isValidEncoding(Encoding))
return TokError("unsupported encoding.");
if (getLexer().isNot(AsmToken::Comma))