[variabilepippo]

Il file. asm è uguale al .s?

Cosa intendi per "uguale"?

Ogni compilatore genera un codice binario diverso, quindi i file .asm/.s in generale non sono uguali se creati da compilatori differenti.

Per esempio GNU GCC tira fuori (partendo dall'Hello World) il seguente file prova.s:

	.file	"test.c"
	.def	___main;	.scl	2;	.type	32;	.endef
	.section .rdata,"dr"
LC0:
	.ascii "CIAO MONDO!\0"
	.text
	.p2align 4,,15
.globl _main
	.def	_main;	.scl	2;	.type	32;	.endef
_main:
	leal	4(%esp), %ecx
	andl	$-16, %esp
	pushl	-4(%ecx)
	pushl	%ebp
	movl	%esp, %ebp
	pushl	%ecx
	subl	$4, %esp
	call	___main
	movl	$LC0, (%esp)
	call	_puts
	addl	$4, %esp
	xorl	%eax, %eax
	popl	%ecx
	popl	%ebp
	leal	-4(%ecx), %esp
	ret
	.def	_puts;	.scl	2;	.type	32;	.endef

Se preferisci la sintassi Intel:

	.file	"test.c"
	.intel_syntax
	.def	___main;	.scl	2;	.type	32;	.endef
	.section .rdata,"dr"
LC0:
	.ascii "CIAO MONDO!\0"
	.text
	.p2align 4,,15
.globl _main
	.def	_main;	.scl	2;	.type	32;	.endef
_main:
	lea	ecx, [esp+4]
	and	esp, -16
	push	DWORD PTR [ecx-4]
	push	ebp
	mov	ebp, esp
	push	ecx
	sub	esp, 4
	call	___main
	mov	DWORD PTR [esp], OFFSET FLAT:LC0
	call	_puts
	add	esp, 4
	xor	eax, eax
	pop	ecx
	pop	ebp
	lea	esp, [ecx-4]
	ret
	.def	_puts;	.scl	2;	.type	32;	.endef

Se invece usi il compilatore Borland:

	.386p
	ifdef ??version
	if    ??version GT 500H
	.mmx
	endif
	endif
	model flat
	ifndef	??version
	?debug	macro
	endm
	endif
	?debug	S "test.c"
	?debug	T "test.c"
_TEXT	segment dword public use32 'CODE'
_TEXT	ends
_DATA	segment dword public use32 'DATA'
_DATA	ends
_BSS	segment dword public use32 'BSS'
_BSS	ends
DGROUP	group	_BSS,_DATA
_TEXT	segment dword public use32 'CODE'
_main	proc	near
?live1@0:
   ;	
   ;	int main(void){
   ;	
	push      ebp
	mov       ebp,esp
   ;	
   ;		puts("CIAO MONDO!");
   ;	
@1:
	push      offset s@
	call      _puts
	pop       ecx
   ;	
   ;		return 0;
   ;	
	xor       eax,eax
   ;	
   ;	}
   ;	
@3:
@2:
	pop       ebp
	ret 
_main	endp
_TEXT	ends
_DATA	segment dword public use32 'DATA'
s@	label	byte
	;	s@+0:
	db	"CIAO MONDO!",0
	align	4
_DATA	ends
_TEXT	segment dword public use32 'CODE'
_TEXT	ends
	public	_main
 extrn   _puts:near
	?debug	D "test.c" 14468 26281
	end