maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

* Override the "EmitBytes" function, since it can sneak values in that way. 

* Make this used only if CFI is used.

llvm-svn: 133319
This commit is contained in:
Bill Wendling 2011-06-18 00:19:35 +00:00
parent e4a1266a9a
commit 098321c145
1 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
llvm/lib/MC/MCAsmStreamer.cpp
View File

@ -1342,6 +1342,7 @@ public:
Assignments.push_back(Value);
MCAsmStreamer::EmitAssignment(Symbol, Value);
}
virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
virtual void EmitIntValue(uint64_t Value, unsigned Size,
unsigned AddrSpace = 0);
virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
@ -1360,6 +1361,22 @@ public:
} // end anonymous namespace
void MCLSDADecoderAsmStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
if (InLSDA && Data.size() == 1) {
LSDAEncoding.push_back((unsigned)(unsigned char)Data[0]);
++BytesRead;
if (LSDAEncoding.size() == 4)
// The fourth value tells us where the bottom of the type table is.
LSDASize = BytesRead + LSDAEncoding[3];
else if (LSDAEncoding.size() == 6)
// The sixth value tells us where the start of the action table is.
ActionTableBytes = BytesRead;
}
MCAsmStreamer::EmitBytes(Data, AddrSpace);
}
void MCLSDADecoderAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size,
unsigned AddrSpace) {
if (!InLSDA)
@ -1607,7 +1624,7 @@ MCStreamer *llvm::createAsmStreamer(MCContext &Context,
ExceptionHandling::ExceptionsType ET =
Context.getAsmInfo().getExceptionHandlingType();
if (isVerboseAsm &&
if (useCFI && isVerboseAsm &&
(ET == ExceptionHandling::SjLj || ET == ExceptionHandling::DwarfCFI))
return new MCLSDADecoderAsmStreamer(Context, OS, isVerboseAsm, useLoc,
useCFI, IP, CE, TAB, ShowInst);