File: uwin.asm

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/* stuff needed for libgcc on win32.  */

#ifdef L_chkstk

        .global __chkstk
        .global        __alloca
__chkstk:
__alloca:
        pushl  %ecx                /* save temp */
        movl   %esp,%ecx        /* get sp */
        addl   $0x8,%ecx        /* and point to return addr */

probe:         cmpl   $0x1000,%eax        /* > 4k ?*/
        jb    done                

        subl   $0x1000,%ecx                  /* yes, move pointer down 4k*/
        orl    $0x0,(%ecx)                   /* probe there */
        subl   $0x1000,%eax                   /* decrement count */
        jmp    probe                            /* and do it again */

done:         subl   %eax,%ecx           
        orl    $0x0,(%ecx)        /* less that 4k, just peek here */

        movl   %esp,%eax
        movl   %ecx,%esp        /* decrement stack */

        movl   (%eax),%ecx        /* recover saved temp */
        movl   4(%eax),%eax        /* get return address */
        jmp    *%eax        


#endif