When to use assembly language to debug a c/c++ program?
When to use the assembly to debug a c/c++ program? Does it help to learn some assembly to debug programs? ...
assembly
Compatibility Issue of ASM 3.1 and HIbernate and JAX-RS
Hi, I have found out that "Hibernate cannot be combined with the reference implementation of JAX-RS." on the link http://lists.jboss.org/pipermail/hibernate-issues/2009-May/015628.html So i am unable to combine JAX-RS (jersey) with hibernate, does anybody know a work around for this ? ...
"Low [Machine] Level" Blogs
I am looking for Blogs that discuss low level programming like assembler, how a .dll loads, how to process links to a .dll, and how a loader maps DLLs into a Process Address Space, among other topics. Links are appreciated. ...
AT&T vs Intel Syntax and Limitations?
To me, Intel syntax is much easier to read. If I go traipsing through assembly forest concentrating only on Intel syntax, will I miss anything? Is there any reason I would want to switch to AT&T (outside of being able to read others' AT&T assembly)? My first clue is that gdb uses AT&T by default. If this matters, my focus is only on any...
Assembly 8086: Converting 8-bit binary number to its Gray number equivalent?
Problem: Write a program to convert an 8-bit binary number entered from the keyboard to the equivalent Gray code binary number, using the following the algorithm: Question: As I'm learning assembly (8086, required by class), I'm not sure how to do this? Do I convert each character (1 or 0) as I receive it from the keyboard? Or, d...
What does "multicore" assembly language look like?
Once upon a time, to write x86 assembler, for example, you would have instructions stating "load the EDX register with the value 5", "increment the EDX" register, etc. With modern CPUs that have 4 cores (or even more), at the machine code level does it just look like there are 4 separate CPUs (i.e. are there just 4 distinct "EDX" regist...
Unravelling Assembly Language Spaghetti Code
I've inherited a 10K-line program written in 8051 assembly language that requires some changes. Unfortunately it's written in the finest traditions of spaghetti code. The program--written as a single file--is a maze of CALL and LJMP statements (about 1200 total), with subroutines having multiple entry and/or exit points, if they can be i...
How does this piece of assembly work?
Hi, I recently needed to debug a program at assembly level. I don't have a lot of assembler experience, so I figured I'd write some simple C programs and single-step through them in order to get a feeling for the language before I'd start debugging other peoples code. However, I really don't get what gcc made of these two lines (compile...
Java bytecode generation with generic signature information from reflect.Method
I am trying to bytecode generate a method signature from a java.lang.reflect.Method. The signature(generic type) part of it is tricky as the reflection api to get the type information and transform it into what asm needs is NOT straightforward. Know of any code out there which does this already? ...
Why do programmers confuse the term "assembler" with "assembly"?
As programmers we need to be precise with our verbal and written communication. Why do so many programmers confuse the term "assembler" (the object code generator) with "assembly" (the language you program in)? The distinction is unambiguous. Could there be historical explanation? ...
Windows: avoid pushing full x86 context on stack
I have implemented a language under MS Windows that uses cactus stacks to implement parallel programs. The stack chunks are allocated on a per-function basis and are just the right size to handle local variables, expression temp pushes/pops, and calls to libraries (including stack space for the library routines to work in). Such stack ...
Setting affinity in multicore x86 processors.
( I ask because it was before serious SMP and multicore that I studied OS. I like to have some vision of how code is being executed. ) If I have a multicore x86 CPU booting directly into my program. Can someone recommend a website which describes what assembler commands do I have to control affinity? ...
how to integrate assembly code when i am designing a compiler in c?
i am designing a compiler in c . but for certain problems like big integers i have to code in assembly code . so how can i integrate assembly code in c? i am wrting my code in dev cpp.. which i suppose uses gcc ... in windows..!!.. pls give me instructions for linux too ...
Most Efficient Unicode Hash Function for Delphi 2009
I am in need of the fastest hash function possible in Delphi 2009 that will create hashed values from a Unicode string that will distribute fairly randomly into buckets. I originally started with Gabr's HashOf function from GpStringHash: function HashOf(const key: string): cardinal; asm xor edx,edx { result := 0 } and eax,eax ...
call stack and disassembly doubt.
Three doubts 1) Suppose I get the call stack as below user32.dll!_InternalCallWinProc@20() + 0x28 bytes user32.dll!_UserCallWinProcCheckWow@32() + 0xb7 bytes user32.dll!_CallWindowProcAorW@24() + 0x51 bytes user32.dll!_CallWindowProcW@20() + 0x1b bytes Now what are the bytes mentioned at the end of each function? Like for f...
Assembly in Linux
I'm reading a tutorial on building compilers.In the tutorial the compiler produces assembly 80X86 and I want to know if the programs made by this compiler would run in a Intel Celeron Linux.If not what kind of assembly the compiler should produce there? ...
What kind of projects (besides the obvious OS stuff) use assembly language?
Seemingly, no one uses assembly nowadays other than to develop device drivers, or the very core of OS kernels etc. Anyone has knowledge of it being currently used for other things? I mean PC-style and bigger hardware, not embedded stuff with teeny tiny processors. ...
Confused about memory locations of this Y86 assembly code
We had a piece of code in C in one class where we needed to convert it to Y86 and this was written on the board by some guy with the teacher's correction of course. However, I'm confusing the memory locations and .pos directives on the initial part of the code: int array[100], sum, i; int main() { sum = 0; for(i = 0; i < 100;...
How is assembly language incorporated into a program?
I have read in a lot of places that assembly language is not usually used to create complete programs, but is used by other programs to make certain procedures more efficient, particularly the ones that are called a couple thousand times a second. I am wondering how small bits of assembly code are incorporated into larger programs. I ...
How to view the assembly behind the code? (MSVC++ If Relevent)
I was reading another question pertaining the efficiency of two lines of code, and the (asker?, questioner?, querier?) said that he looked at the assembly behind the code and both lines were identical in assembly. Digression aside, how could I view the assembly code created when a program is compiled. I'm using Microsoft's Visual C++, ...