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[Clifford Wolf <clifford@clifford.at>]

Hi,

in einem meiner projekte hab' ich folgenden code:

--snip--
/*
 * This doesn't resolve any symbols and doesn't use
 * any libc features. So it's the perfect debug function
 * for our purposes.
 */
static void wrapper_debug_out(char *txt) {
        long len = 0;

        while (txt[len]) len++;

        asm volatile (
                        "int $0x80"
                : /* output */
                : /* input */
                        "a" ((long)(4)),        /* write  */
                        "b" ((long)(2)),        /* stderr */
                        "c" ((long)(txt)),      /* text   */
                        "d" ((long)(len))       /* length */
        );
}
--snap--

dafuer bekomm' ich vom compiler die meldung

wrapper.c:37: error: can't find a register in class `BREG' while reloading `asm'

das ganze funktioniert wenn ich statt dessen folgendes assembler template
verwende:

--snip--
        asm volatile (
                        "pushl %%ebx\n\t"
                        "mov $2, %%ebx\n\t"     /* stderr */
                        "int $0x80\n\t"
                        "popl %%ebx"
                : /* output */
                : /* input */
                        "a" ((long)(4)),        /* write  */
                        "c" ((long)(txt)),      /* text   */
                        "d" ((long)(len))       /* length */
        );
--snap--

kann ich dem register allocator irgendwie sagen dass er %ebx gefaelligst
selbst pushen soll wenn es gerade nicht frei ist?

lg,
 - clifford

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I would rather use Java than Python. And I'd rather be eaten by a crocodile
than use Java.