From owner-freebsd-hackers  Fri Aug 24 11: 8:15 2001
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Date: Fri, 24 Aug 2001 11:08:05 -0700
From: "David O'Brien" <obrien@freebsd.org>
To: Steve Roome <stephen_roome@yahoo.com>
Cc: freebsd-hackers@freebsd.org
Subject: Re: function calls/rets in assembly
Message-ID: <20010824110805.C88259@dragon.nuxi.com>
Reply-To: obrien@freebsd.org
References: <20010824010139.E365@dylan.home>
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In-Reply-To: <20010824010139.E365@dylan.home>; from stephen_roome@yahoo.com on Fri, Aug 24, 2001 at 01:01:39AM +0100
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On Fri, Aug 24, 2001 at 01:01:39AM +0100, Steve Roome wrote:
> How exactly should functions work in assembly, afaict, the
> following C :
> 
> void printasint(int p) { printf ("print this %d\n", (int)p);}

Why not just ask the compiler??

$ cc -S -O0 printasint.c
$ cat printasint.s


	.file	"foo.c"
	.version	"01.01"
gcc2_compiled.:
	.section	.rodata
.LC0:
	.byte	 0x70,0x72,0x69,0x6e,0x74,0x20,0x74,0x68,0x69,0x73
	.byte	 0x20,0x25,0x64,0xa,0x0
.text
	.p2align 2,0x90
.globl printasint
		.type		 printasint,@function
printasint:
	pushl %ebp
	movl %esp,%ebp
	subl $8,%esp
	addl $-8,%esp
	movl 8(%ebp),%eax
	pushl %eax
	pushl $.LC0
	call printf
	addl $16,%esp
.L2:
	leave
	ret
.Lfe1:
		.size		 printasint,.Lfe1-printasint
	.ident	"GCC: (c) 2.95.3 20010315 (release)"

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