Re: function calls/rets in assembly

[David O'Brien]

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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