Message-ID: <3B36A44F.28AB8846@iedu.com>
From: Morris Dovey <mrdovey AT iedu DOT com>
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Subject: Re: DJGPP reserves wrong int size
References: <9dde68b7 DOT 0106241053 DOT 2a385311 AT posting DOT google DOT com>
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Date: Sun, 24 Jun 2001 21:39:11 -0500
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

ZMAN wrote:

> Please consider the following code:
>
> int main ()
> {
> int i;
> i = 0x12345678;
> }
>
> -Yes I am aware there is no return statement even if I do have it in there
> it still messes up.
> When I compile this code using:
>
> gcc -c test.c
> ld -o test -Ttext 0x0 -e main test.o
> objcopy -R .note -R .comment -S -O binary test test.bin
>
> and disassemble it I get the following:
>
> 00000000 55                          push ebp
> 00000001 89E5                        mov ebp,esp
> 00000003 83EC04                      sub esp,byte +0x18
> 00000006 C745FC78563412              mov dword [ebp-0x4],0x12345678
> 0000000D C9                          leave
> 0000000E C3                          ret
>
> The third line reserves 18 bytes.
> And it should reserve 4 bytes because thats the size of an int right?
> If you declare a char it still reserves 18 bytes.
> Could someone tell me what's going on?  I am loosing my mind!
> Line 4 is correct though.
>
> I am compiling this on Windows 98 and ME boxes and still get the same results.
> The gcc version number is 2.953
> binutills is version 2.11

ZMAN...

The third line appears to reserve 24 bytes. Is the problem that you don't trust
the generated code? Has it produced incorrect results?
--
Morris Dovey
West Des Moines, Iowa USA
mrdovey AT iedu DOT com