I need to know how to create a shared object with FASM and how to export simbols.I need to know too, how to import simbol from other shared object. If any people have any example to show I'm would be very pleasure

Shared objects are quite simple.

First, you have to use Format ELF

then exports are defined using:



where function_name is defined somewhere in the code as a regular label

importing functions is done using:



where function_name is defined in the shared object you are going to link with.

then you can fasm the code, to generate a .o ELF shared object file

this can then be linked in with other objects using ld, example:



This should work fine if all dependancies are defined.

(If you were talking about shared libraries (.so files), then im not sure how to do that, I think its just done using extrn, then you have to link using libtool instead of ld (or ld -shared), im not 100% sure, and i havent tried it. But you could look up linuxassembly.org or similar for a tutorial on it, even if its for nasm, its easy to convert)

There are any poibility to use the macrointruccion "proc" in this format and is posible to create this so only with FASM.

There are any poibility to use the macrointruccion "proc" in this format and is posible to create this so only with FASM.

I believe proc should work fine if you include only the proc.inc file (not the full win32a.inc), you just have to make sure theres nothing windows-specific, but proc shouldnt be, its just extending the labels/ret.

As for purely only fasm, I dont think its possible, theres been several threads about it before in the board (if you want to search), but im pretty sure theres no way to link with fasm (and it indeed shouldnt, its an assembler, not a linker). Using ld isnt hard, and pretty much all linux distro's will have it, as its part of binutils. So only _very_ trimmed down distros not aimed at development may not have it.

Take a look into this: http://board.flatassembler.net/topic.php?t=4964