2009-08-19T00:00:00Z x86asm.net http://x86asm.net/ admin@x86asm.net x86asm.net favicon.ico x86asm.net MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2010-01-20T00:00:00Z

Mostly a bugfix release.

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2009-08-19T00:00:00Z

All SSE4, VMX and SMX instructions added, along with few new general and system instructions. This makes the reference up-to-date with current Intel processors.

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2009-06-30T00:00:00Z

Banzai! This is the first revision considered stable (after more than two years of development). The overall structure and many bugs have been fixed, no new instructions.

vid x86asm.net/articles/uefi-programming-first-steps 2009-03-31T00:00:00Z 2009-03-31T00:00:00Z

In this article, I will describe steps needed to start on with development of real UEFI applications on x86 PC, and share some practical experiences with problems doing so. I will focus on 64-bit version of UEFI, because the 32-bit version isn't much used in this area (most likely due to Microsoft decision not to support UEFI in 32-bit Vista). So, to follow some of my steps here, you'll need a 64-bit CPU (but not 64-bit OS, you can use any 32-bit OS as well). We will finish this article with EFI Hello World application.

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2008-12-17T00:00:00Z

Mostly a bugfix release

vid x86asm.net/articles/introduction-to-uefi 2008-07-31T00:00:00Z 2008-10-24T00:00:00Z

New revision: Added Mark Larson's reaction; few minor fixes

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2008-10-19T00:00:00Z

New revision, massive update to the reference: All SSE, SSE2, SSE3, and SSSE3 instructions added; alphabetically sorted editions; the store improved, prices discounted

Don Bailey x86asm.net/articles/uefi-hypervisors-winning-the-race-to-bare-metal 2008-09-24T00:00:00Z 2008-09-24T00:00:00Z

Improvements in Operating Systems security have created a race to "bare metal" between malware and protection software authors. Bare metal capabilities are defined as software or firmware applications that run outside the context of the OS and are therefore very powerful and difficult to detect. Hypervisors and SMM based rootkits are examples of bare metal capabilities. Because the digital battle ground is contracting, advantage goes to the one who can establish a presence there first.

vid x86asm.net/articles/introduction-to-uefi 2008-07-31T00:00:00Z 2008-07-31T00:00:00Z

In the beginning, there was BIOS (I assume reader knows what BIOS is). Back in those times, processors were running in 16-bit mode, and RAM was architecturally limited to 1 megabyte. As the evolution went forth, came 32-bit, and later 64-bit x86 CPUs, amount of RAM was increasing, and new ways of accessing it were being developed. But BIOS remained same. This situation was was far from ideal, since BIOS code was very limited, and operating system loader had to load kernel just with using the most basic BIOS services, from 20 years ago. Creating new standard seemed impossible on such diverse market. But it was done anyway.

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2008-05-15T00:00:00Z

New Revision: All MMX instructions added; benefits for contributors

MazeGen x86asm.net/articles/portable-x86-flat-syntax 2008-04-18T00:00:00Z 2008-04-18T00:00:00Z

From time to time, speculations about portable assembler (what is a contradiction itself) araise. As an assembly programmer, I couldn't avoid these weird speculations. The similarity between x86-32 and x64 simply can't be overlooked and itself leads to finding some conjunctive syntax, here called Portable x86 Flat Syntax (PFS).

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2008-03-11T00:00:00Z

New Revision: All x87 FPU instructions added, including new ones; The l column was renamed to x and now holds more information; In HTML a PDF editions, the prefix values were moved to pf column; On-line store opened; The project was renamed to X86 Opcode and Instruction Reference

vid x86asm.net/articles/oop-from-low-level-perspective 2008-02-06T00:00:00Z 2008-02-06T00:00:00Z

For many lowlevel programmers, object oriented programming (OOP) tends to be confusing and filled with abstractions. In this article I build up and explain some aspects of OOP from C or Assembly programmer's point of view.

Gabriel Ivancescu x86asm.net/articles/assemblers/fixed-point-arithmetic-and-tricks 2007-12-21T00:00:00Z 2007-12-21T00:00:00Z

I see many people get confused at fixed point and believe it's some kind of "hack" because they think floating point are "real" numbers. Real numbers are abstract mathematical representation - computers are not abstract, they do not employ normal mathematics (for example, infinite numbers). It only tries to "emulate" the abstract math (bits being volts, holes, magnetic charges, etc). People who use floating point to represent fractional parts definitely don't know what float is.

vid http://fasmlib.x86asm.net/download.html 2007-03-04T00:00:00Z 2007-12-06T00:00:00Z

What's new: qword conversion added, HTML documentation added, several changes / fixes / improvements

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2007-11-29T00:00:00Z

New Revision: The HTML table is split into two parts: one-byte and two-byte opcode part. This should make browsers to render it faster and more easily. I hope this also helps Firefox to render the table at first (without refresh); Instructions, which doesn't really test all flags but push them on the stack (PUSHF, INT and few others) are corrected (suggested by Wolfgang Kern); PDF edition for each HTML edition

vid x86asm.net/articles/assemblers/calling-bios-from-driver-in-windows-xp-x64 2007-11-26T00:00:00Z 2007-11-26T00:00:00Z

As we all know, we shouldn't call BIOS from Windows drivers, and Windows officially doesn't support this. But recently, I was in situation where I had to do it, so I looked for some way how.

Madis Kalme x86asm.net/articles/assemblers/using-xmm-for-general-purpose-simd-with-gpr 2007-11-26T00:00:00Z 2007-11-26T00:00:00Z

Nowadays the goal of a new CPU is not to give you the highest clock rates, not even the highest performance (while it's still a big part of it), but to give you the best performance-per-watt number. While specific instructions are introduced, the course is to perform best in every possible application. May it be for office work, scientific, educational or gaming.

vid x86asm.net/articles/assemblers/working-with-big-numbers-using-x86-instructions 2007-11-20T00:00:00Z 2007-11-20T00:00:00Z

New revision: Partial rewrite and additions

Feryno fdbg.x86asm.net/download.html 2007-03-20T00:00:00Z 2007-11-12T00:00:00Z

finished fdbg version 001A for win64

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2007-11-06T00:00:00Z

New revision: Added coder, coder32, coder64, geek32, and geek64 editions. All main project's files modified. Project's documentation completed.

vid x86asm.net/articles/assemblers/working-with-big-numbers-using-x86-instructions 2007-11-06T00:00:00Z 2007-11-06T00:00:00Z

"Big number" arithmetics requires special care on x86 architecture. You need to use some properties of arithmetic instructions, which are not immediately apparent.

Feryno x86asm.net/articles/backdoor-support-for-control-transfer-breakpoint-features 2007-09-31T00:00:00Z 2007-09-31T00:00:00Z

It is well known that both AMD64 and Intel EM64T CPUs support Control-Transfer Breakpoint Features. When I was trying to implement this feature in FDBG, a hidden backdoor was discovered, which makes the implementation very easy.

Feryno fdbg.x86asm.net/download.html 2007-03-20T00:00:00Z 2007-10-30T00:00:00Z

n/a

vid fasmlib.x86asm.net/download.html 2007-03-04T00:00:00Z 2007-10-23T00:00:00Z

This is after long time first "stable" release version.

MazeGen x86asm.net/articles/x86-64-tour-of-intel-manuals 2007-10-04T00:00:00Z 2007-10-04T00:00:00Z

I'm always surprised by how few asmers use probably the best source of information available - official processor manuals, either Intel's or AMD's. That's why this article was written. It should guide you step by step through complexity of Intel manuals, describing x86-64 architecture in the process.

Feryno x86asm.net/articles/debugging-in-amd64-64-bit-mode-in-theory 2007-09-29T00:00:00Z 2007-09-29T00:00:00Z

A debugger is kind of blackbox for a regular user. The interactions between debugger and OS are kept under the cover. Let's uncover them and see how it all works.

vid x86asm.net/articles/assemblers/what-i-dislike-about-gas 2007-09-28T00:00:00Z 2007-09-28T00:00:00Z

I often get to argument with various linux guys about AT&T versus Intel syntax. There are many things I dislike on AT&T syntax, so I decided to write them all down in this article.

vid x86asm.net/articles/memory-allocation-in-linux 2007-09-24T00:00:00Z 2007-09-24T00:00:00Z

Many assembly programmers make linux applications using only syscalls, without glibc. Altough this way is usually considered bad practice, it is a fact.

vid x86asm.net/articles/assemblers/external-dependencies-in-assemblers 2007-08-15T00:00:00Z 2007-08-15T00:00:00Z

Each assembler handles external dependencies on its own. I have investigated various assemblers and made interesting discussion.

MazeGen ref.x86asm.net 2007-06-04T00:00:00Z 2007-06-04T00:00:00Z

This reference should be precise instruction set reference (including x86-64). Its principal aim is exact definition of instruction parameters and attributes.