The flat assembler abbreviated to fasm, intentionally stylized with lowercase letters is a fast self-assembling assembler running in a variety of operating systems, in continued development since It was designed primarily for the assembly of x86 instructions and it supports x86 and x instructions sets with MMX, 3DNow! It includes the powerful but easy to use macroinstruction support and does multiple passes to optimize the size of instruction codes. The flat assembler is self-hosting and the complete source code is included.
The only difference between the various flat assembler packages is the operating system on which they can be executed. For any given source each version is going to generate exactly the same output file, so each of the following releases can be used to compile programs for any operating system. The flat assembler g abbreviated to fasmg is a new assembly engine designed to become a successor of the one used by flat assembler 1.
Instead of having a built-in support for x86 instructions, it implements them through additional includable packages and in the same way it can be adapted for many different architectures.
With the included example packages it is capable of generating all the output formats that flat assembler 1 could and additional ones, like Mach-O or Intel HEX. The following are some third-party products based on flat assembler, they are available to download from their respective websites.Ford powerstroke fuse box
The flat assembler is made by a single person - Tomasz Grysztar - as a hobby project. Although it is an open-source freeware, donations are appreciated to help cover cost and time-loss. It is a great help in maintaining this project. If you would like to send money donation to the author, please click the button beside.
It also contains the set of includes with equates and macroinstructions for Windows programming and some examples of Windows programs created with help of them.
The provided documentation is in PDF format. It also contains the documentation in text format using DOS character set. If you want to use flat assembler from the command line of Windows system, you should use the Windows console version instead of this one.
The object file provided in this package can be linked with the bit C library to create the final executable for any such system. It is packaged with examples of macroinstructions that allow assembly of simple programs for the architectures like x86, x64,AVR, or Java Virtual Machine. More examples and instructions set definitions for other architectures can be found in the further sections of this website.
It also provides a portable library of routines for x86 assembly language programming. Apart from the command line version for Windows console this package contains the one with integrated syntax-highlighting editor, so you can edit, compile and execute your programs from one place.
This is a version for the Linux systems running on x86 or x64 compatible processors. This version can be executed from command line of any operating system compatible with DOS and contains few tiny examples of DOS programs. A cross-assembler for ARM architectures based on flat assembler 1, available in versions for Windows and Linux.
Fresh IDE. An IDE with flat assembler 1 built-in.Welcome to the site of flat assembler! This is a place dedicated to assembly language programming and contains many resources for both beginners and advanced assembly programmers. This site is constantly being improved, and hopefully you'll find here some useful material, no matter whether you are trying to learn the assembly language, or just looking for a solution to a particular problem.
MASM for x64 (ml64.exe)
The name of flat assembler is intentionally stylized with lowercase letters, this is a nod to its history. Download Here you can download the flat assembler - an open source assembly language compiler, packaged for various operating systems. Documentation All the official documentation for flat assembler, and some other official articles about it are gathered here. Examples Here you can browse and download example projects made with flat assembler, which were shared with full source code by their authors in order to help other people learn from ready projects.
Message board This is a place where you can ask questions about flat assembler for which you have not found answers in the documentation, report bugs, or just talk with other assembly language programmers. You can also find several guides and tutorials there. Here you can download the flat assembler - an open source assembly language compiler, packaged for various operating systems. All the official documentation for flat assembler, and some other official articles about it are gathered here.
Here you can browse and download example projects made with flat assembler, which were shared with full source code by their authors in order to help other people learn from ready projects.
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How would I convert it so it would run in 64 bit program. The calling convention for doubles in 64 bit mode uses xmm registers, you'll have to adjust your cinvoke lines if it even supports that. Otherwise just use manual code, something like:. Update : cinvoke is a helper macro that tries to do the right thing for calling a C function.
You are passing the double in two parts, which might work for a stack-based calling convention, but in 64 bit mode registers are used to pass arguments. For doubles you need to use xmm registers.
The cinvoke macro might know how to do that, but you certainly need to help it by telling it you want to pass a double. The code I posted is a hopefully correct calling sequence for sprintfas such you can use it instead of the cinvoke.
Update 2 : msdn says that for varargs functions and sprintf is one floating point arguments must be duplicated in both integer and xmm registers. Here is a complete console program multiplying 2 values using the FPU:. Note this is for nasm but you should be able to adapt this to your needs. I have tested this using wine.
Learn more. Asked 6 years, 5 months ago. Active 6 years, 5 months ago.
Viewed 1k times. Jester Darrin Woolit Darrin Woolit 69 7 7 bronze badges. Maybe it's something else? We don't use the x87 code in bit.
We use SSE instructions instead. Every x64 processors supports SSE. Unfortunately x87 instructions are still usable in bit mode; so if you insist you can still use them but your code will be slllooooowwwwww.
Active Oldest Votes. Otherwise just use manual code, something like: lea rcx, [buffer1] lea rdx, [format] movsd xmm0, [buffer3] sub rsp, 32 call sprintf add rsp, 32 Disclaimer: I don't have windows to test.It may also be of interest to those writing bit assembler programs for Windows using other tools.
More information, references and links. Introduction to bit programming How easy is bit programming? In fact, you can readily use the same source code to create executables for both platforms if you follow a set of rules. You can also convert existing bit source code to bits and some of the work required to do this can be done automatically using AdaptAsm.
Differences between bit and bit executables top Although bit and bit executables are based on the same PE Portable Executable format, in fact there are a number of major differences. The extent of those differences means that bit code will only run on Win64 using the Windows on Windows WOW64 subsystem. This works by intercepting API calls from the executable and converting the parameters to suit Win The executable contains a flag which tells the system at load-time whether it is bit or bit.
If the x64 loader sees a bit executable, WOW64 kicks-in automatically. This means that bit and bit code cannot be mixed within the same executable. The significance of the above is that the programmer has to choose between:- Making one version of the application Win This will work on both platforms. Making two versions of the application one for Win32 and one for Win The "magic number" at the beginning of the optional header is 20Bh instead of 10Bh.
The import address table where the loader overwrites the addresses of external calls such as the addresses of APIs in system Dlls is enlarged to bits, as is the import look-up table. This is because the address of external calls could be anywhere in memory. The default base address in Win64 is h as in Win32 files. You can view the internals of the PE file using Wayne J. Radburn's PEview. Instead this must be done by the caller to the API. The caller must also ensure that there is space on the stack for the API to store the parameters which are passed in registers.
In practice this is achieved by reducing the stack pointer by 32 bytes just before the call. This means that your window procedures will pick up the parameters in a different way under Win Also the window procedures no longer have to restore the stack to equilibrium.
All functions using a stack frame including window procedures need to follow certain rules if they wish to make use of exception handling.
The tools need also to add exception frame records to the executable. This will also be handled automatically by the "Go" tools. Note this is not yet available Register volatility. These are called the "non-volatile" registers. The "volatile" registers are those which may be changed by APIs, and which you do not need to save and restore in your window procedures and other callback procedures.
You might not have expected this, but in bit assembly for the AMD64, pointers to code and data whose addresses are within the executable are still only bits.
Pointers to external addresses, such as functions in Dlls, are bit wide so that the function can be anywhere in memory see call address sizes. In Win64 the data size of all handles and pointers are now bits instead of bits. See Changes to Windows data types for more. In Win64 there are stricter requirements for the alignment of the stackdataand for structures see alignment of structures and structure members.#8. FASM подробно: Hello, world! / 4. Введение в ассемблер / Программирование с нуля
The Windows APIs have been modified to work in bits. There are, however, a small number of new APIs to handle the extra requirements of bit operation. See Writing Unicode programs. Differences between x86 and x64 processors top The main differences are the expanded register range, some changes to instructions, and the use of RIP-relative addressing.You seem to have CSS turned off. Please don't fill out this field. Please provide the ad click URL, if possible:.
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Follow flat assembler flat assembler Web Site. Despite its small size, Rufus provides everything you need! This can be immensely useful while you're on the go or just need access to an OS for a temporary, isolated reason. Even though Rufus is a tiny utility in comparison to other USB creation tools that can be rather bulky in size, it contends easily with the competition and creates bootable USB drives in record time!
Download Now. User Reviews Be the first to post a review of flat assembler! Report inappropriate content. Oh no! Some styles failed to load. Thanks for helping keep SourceForge clean.Home Search Register Log in to check your private messages Log in. While bit systems are in general capable of running a bit executables, there are some Linux builds out there that have this feature disabled in the kernel. This makes it impossible to run fasm on such machines without writing a bit version from scratch.Firefox color management
Or does it? I've been thinking about this for a few years already, and I had some ideas on how to run fasm's core in "use64" setting.
Now I finally decided to confront my ideas with reality. The trick lies in the fact that bit addressing is still available in long mode. As long as the address fits in 32 bits, [ebx] can be used instead of [rbx] and the instruction is going to be correctly encoded and executed. Therefore it should suffice to ensure that all memory allocated for fasm's use lies in the low 4G of addressing space.
These two instructions need to be replaced with macros that emulate bit stack. For example "push eax" has to become: Code:.
BTW, it almost hurt to write non-trivial macros for fasm 1 after a period of writing only ones for fasmg. At first I cringed a few times, but then I got it going. This is very cool, thanks for your painful effort! I have run non-multiarch platforms before, and in some cases they make for very nice minimalist environments. Are there any standard distros that are not multilib? Tomasz Grysztar wrote:. Does anyone here run bit OpenBSD somewhere? I wonder if this would work there. Will this in any way affect anything in elf.
These changes kind of scare me because I am relying on both for my SO. I have cleaned up some things in fasm's core to make this adaptation a bit simpler and I included this bit executable in the Linux package with the new 1.
If I only made it available here, it is probable that the people that may find it useful would never find out about it. Tomasz, how about that nasty Y issue? Limiting syscall arguments to bit may re-introduce that problem in bit environment. I missed this thread from the beginning, but it is remarkable.
Very interesting workaround. Tomasz whether it is possible to porting fasm to windows bit like you did for linux?
Below is such a code correct? Tomasz Grysztar While bit systems are in general capable of running a bit executables, there are some Linux builds out there that have this feature disabled in the kernel. Also fasm sometimes accesses PUSHed values with instructions like "mov eax,[esp]". Because the stack cannot be assumed to reside in low memory, RSP has to be used for all such addressing.
A simple "esp equ rsp" re-definition does it, but a few special cases need to be handled in macros. But I also noticed that where fasm checks for stack overflow, it uses a sub-optimal code that may not work correctly when ESP is wrapping.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. I'm switching from nasm to fasmbecause the latter has a more expressive macro facility. The downside of fasm is that it doesn't support OSX.
But, with some Google-fu and Makefile-fu, I have made it support OSX, with the same level of portability and convenience that I had previously achieved with nasm! The key insights were found in this forum thread. In order to use the Makefile here, you will need objconvand you will also need an already-working fasm. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Sign up. Assembly Branch: master. Find file. Sign in Sign up.5 aspetti sessuologici della pma nell
Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. Latest commit eea55e3 Jul 11, Copyright c by Agner Fog. Gnu General Public License.
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