Bug 226601

Summary:	unhandled instruction bytes: 0xDD 0x37 and 0x66 0x8D 0x76 0x2
Product:	[Developer tools] valgrind	Reporter:	Brad Beckmann <bradford.beckmann>
Component:	memcheck	Assignee:	Julian Seward <jseward>
Status:	REPORTED ---
Severity:	wishlist
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Bug Depends on:
Bug Blocks:	256630

Description Brad Beckmann 2010-02-12 22:41:46 UTC

Version:            (using Devel)
Compiler:          gcc 4.2.0 
OS:                Linux
Installed from:    Compiled sources

I encountered two valid x86 instructions that Valgrind could not handle: 

bytes: 0xdd37  dis: "fsave (108)Byte ptr DS:[edi]"
bytes: 0x668d7602  dis: "lea si,Word ptr DS:[esi+02h]"

I believe that Valgrind can handle these opcodes, but has a problem decoding the operands.

One should be able to reproduce these bugs with a simple asm file.