IL short-form instructions aren't short?

Posted by Alix on Stack Overflow See other posts from Stack Overflow or by Alix
Published on 2010-05-21T12:17:15Z Indexed on 2010/05/21 12:20 UTC
Read the original article Hit count: 537

Filed under:

c#

|

il

|

.NET

|

reflection

|

reflection.emit

Hi. I was looking at the IL code of a valid method with Reflector and I've run into this:

L_00a5: leave.s L_0103

Instructions with the suffix .s are supposed to take an int8 operand, and sure enough this is should be the case with Leave_S as well. However, 0x0103 is 259, which exceeds the capacity of an int8. The method somehow works, but when I read the instructions with method Mono.Reflection.Disassembler.GetInstructions it retrieves

L_00a5: leave.s L_0003

that is, 3 instead of 259, because it's supposed to be an int8. So, my question: how is the original instruction (leave.s L_0103) possible? I have looked at the ECMA documentation for that (Partition III: CIL Instruction Set) and I can't find anything that explains it.

Any ideas? Thanks.

© Stack Overflow or respective owner

Related posts about c#

.NET WebRequest.PreAuthenticate not quite what it sounds like

as seen on West-Wind - Search for 'West-Wind'
I’ve run into the problem a few times now: How to pre-authenticate .NET WebRequest calls doing an HTTP call to the server – essentially send authentication credentials on the very first request instead of waiting for a server challenge first? At first glance this sound like it should be easy:… >>> More
HttpWebRequest and Ignoring SSL Certificate Errors

as seen on West-Wind - Search for 'West-Wind'
Man I can't believe this. I'm still mucking around with OFX servers and it drives me absolutely crazy how some these servers are just so unbelievably misconfigured. I've recently hit three different 3 major brokerages which fail HTTP validation with bad or corrupt certificates at least according to… >>> More
The dynamic Type in C# Simplifies COM Member Access from Visual FoxPro

as seen on West-Wind - Search for 'West-Wind'
I’ve written quite a bit about Visual FoxPro interoperating with .NET in the past both for ASP.NET interacting with Visual FoxPro COM objects as well as Visual FoxPro calling into .NET code via COM Interop. COM Interop with Visual FoxPro has a number of problems but one of them at least got a lot… >>> More
Dynamic Type to do away with Reflection

as seen on West-Wind - Search for 'West-Wind'
The dynamic type in C# 4.0 is a welcome addition to the language. One thing I’ve been doing a lot with it is to remove explicit Reflection code that’s often necessary when you ‘dynamically’ need to walk and object hierarchy. In the past I’ve had a number of ReflectionUtils that used string based expressions… >>> More
Finding a Relative Path in .NET

as seen on West-Wind - Search for 'West-Wind'
Here’s a nice and simple path utility that I’ve needed in a number of applications: I need to find a relative path based on a base path. So if I’m working in a folder called c:\temp\templates\ and I want to find a relative path for c:\temp\templates\subdir\test.txt I want to receive back subdir\test… >>> More

Related posts about il

Problems with generation of dynamic code

as seen on Stack Overflow - Search for 'Stack Overflow'
This code gif an exception: Invocation exception, please help, I don't know what happen, I think is some thing with the Add because he work when I push onto the stack intergers, and when i push lvalue It's didn't work, thanks static void Main(string[] args) { AppDomain dominioAplicacion… >>> More
Visual Studio support for coding directly in *IL?

as seen on Stack Overflow - Search for 'Stack Overflow'
For the longest time I've been curious to code in Intermediate Language just as an academic endeavour and to gain a better understanding of what's "happening under the hood". Does anybody provide Visual Studio support for *IL in the form of: project templates, IntelliSense integration, and those… >>> More
Article : les expressions régulières revisitées, clair et exhaustif, tout ce qu'il vous faut pour le

as seen on Developper.com - Search for 'Developper.com'
Bonsoir, Cette discussion est consacrée à l'article sur les expressions régulières. Cet article présente le fonctionnement des expressions régulières, la syntaxe et l'utilisation de cet outil avec .Net. http://stormimon.developpez.com/dotn...ns-regulieres/ N'hésitez pas à poster vos commentaires… >>> More
L'empire Google est-il « Evil » ? le géant se développe-t-il trop ?

as seen on Developper.com - Search for 'Developper.com'
L'empire Google est-il "Evil" ? le géant se développe-t-il trop ? Une vidéo (pas très objective) publiée récemment sur le Net tend à raviver la psychose qui tourne autour de Google et du contrôle quasi-mondial que la firme pourrait opèrer sur les êtres humains. En reprenant certains… >>> More
Code Metrics: Number of IL Instructions

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
In my previous posting about code metrics I introduced how to measure LoC (Lines of Code) in .NET applications. Now let’s take a step further and let’s take a look how to measure compiled code. This way we can somehow have a picture about what compiler produces. In this posting I will introduce you… >>> More