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Date: Fri, 9 Dec 2005 14:16:03 +1100
From: Paul Mackerras <paulus@samba.org>
To: "Tjernlund" <tjernlund@tjernlund.se>
In-Reply-To: <000e01c5fc4c$25b17cb0$020120ac@Jocke>
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Cc: Linuxppc-Dev <linuxppc-dev@ozlabs.org>, 'Linh Dang' <linhd@nortel.com>,
	uclibc@uclibc.org
Subject: Re: Linux process ABI broken in 2.6?
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Tjernlund writes:

> Secion 8.4.1 in
> http://refspecs.freestandards.org/LSB_3.1.0/LSB-Core-PPC32/LSB-Core-PPC32.html#PROCESSINITIALIZATION
> 
> says:
> "Contrary to what is stated in the Registers part of chapter 3 of the System V Application Binary Interface PowerPC Processor
> Supplement there are no values set in registers r3, r4, r5, r6 and r7. Instead the values specified to appear in all of those
> registers except r7 are placed on the stack. The value to be placed into register r7, the termination function pointer is not passed
> to the process."
> 
> How do one not pass a termination function in r7 other than setting
> r7 to zero?

"Not passed" means that there is no value provided in any register or
word of memory that should be taken to be the address of a termination
function.

Paul.