From mint-bounce@lists.fishpool.fi  Sat Apr 16 20:05:17 2005
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Date: Sat, 16 Apr 2005 14:01:19 -0400
From: Standa Opichal <opichals@seznam.cz>
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Subject: Re: [MiNT] .xif module load problem
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Hi!

Also I don't understand why this workaround fixes the problem. Because 
the actual problem is a stack corruption. After the dummy.xif module 
successful load the load_modules() dirh.fs contains invalid filesystem 
pointer... This happens for any .xif module I have tried.

STanda


Standa Opichal wrote:
> Hi!
> 
> In the module.c there is the section you can read at the bottom of this 
> mail. I tried the same approach for the inet4.xdd XIF loader function 
> and it solved my problem with loading the .xif drivers in ARAnyM.
> 
> Does anyone have idea why it doesn't work for the module init() function 
> and all the registers need to be saved?
> 
> regards
> 
> STanda
> 
> 
> #if 0
> /*
>  * this don't work?!
>  * why need the registers to be preserved?
>  * all the modules are gcc compiled too ...
>  */
> static void *
> module_init(void *initfunc, struct kerinfo *k)
> {
>     void * _cdecl (*init)(struct kerinfo *);
> 
>     init = initfunc;
>     return (*init)(k);
> }
> #else
> static void *   
> module_init(void *initfunc, struct kerinfo *k)
> {
>     register void *ret __asm__("d0");   
> 
>     __asm__ volatile   
>     (   
>         "moveml    d3-d7/a3-a6,sp@-;"   
>         "movl    %2,sp@-;"   
>         "movl    %1,a0;"   
>         "jsr    a0@;"   
>         "addqw    #4,sp;"   
>         "moveml    sp@+,d3-d7/a3-a6;"   
>         : "=r"(ret)                /* outputs */   
>         : "g"(initfunc), "r"(k)            /* inputs  */   
>         : "d0", "d1", "d2", "a0", "a1", "a2",    /* clobbered regs */   
>         "memory"   
>     );   
> 
>     return ret;   
> }
> #endif
> 
>