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How to set Kernel mode in asm ?

 
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mad3d



Joined: 18 May 2006
Posts: 6
PostPosted: Thu Mar 22, 2007 11:50 am    Post subject: How to set Kernel mode in asm ? Reply with quote
Is there any source out there that I could check?
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Saotome



Joined: 03 Apr 2004
Posts: 182
PostPosted: Thu Mar 22, 2007 5:34 pm    Post subject: Reply with quote
Does it have to be asm?

from ps2cam_rpc.c :
Code:

...
        DI();
        ee_kmode_enter();
       
        iop_addr = (int *)(0xbc000000+ret[1]);

        memcpy(&campacket[0],iop_addr, ret[0]);
               
        ee_kmode_exit();
        EI();
...

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mad3d



Joined: 18 May 2006
Posts: 6
PostPosted: Fri Mar 23, 2007 9:31 am    Post subject: Reply with quote
thanks a lot
but Im looking for asm way.
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cloudhunter



Joined: 17 Aug 2006
Posts: 86
PostPosted: Fri Mar 23, 2007 9:41 am    Post subject: Reply with quote
mad3d wrote:
thanks a lot
but Im looking for asm way.


Forgive me if this isn't possible, but why not compile some code setting to kernel mode, and then disassemble it to see what it looks like in ASM?

Why does it specifically need to be in asm anyway? The PS2 SDK supports ASM embedded inside the C++ code.

Cloudy
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jimparis



Joined: 10 Jun 2005
Posts: 1179
Location: Boston
PostPosted: Fri Mar 23, 2007 4:31 pm    Post subject: Reply with quote
Go look at ee_kmode_enter, it's all inline asm anyway.
ps2sdk/ee/kernel/include/kernel.h
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