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Date:	Fri, 07 Oct 2005 08:26:09 -0700
From:	David Daney <ddaney@avtrex.com>
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To:	"Gleb O. Raiko" <raiko@niisi.msk.ru>
CC:	linux-mips@linux-mips.org
Subject: Re: Bug in the syscall tracing code
References: <43455D2D.1010901@niisi.msk.ru> <20051006205308.GB31717@hattusa.textio> <43459374.5080802@avtrex.com> <434628D3.9050307@niisi.msk.ru>
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Gleb O. Raiko wrote:
> David Daney wrote:
> 
>> That is the conclusion I came to in:
>>
>> http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=4207C3E0.7070405%40avtrex.com 
> 
> 
> 
> Saving in the PT_SCRATCH area (pad0 in C) was a solution for 2.4. 
> Unfortunately, syscall arguments are stored there (and that's why pad0 
> exists in pt_regs after all). So, using PT_SCRATCH as a temporary 
> storage for t2 will break tracing syscalls with more than 4 args for o32 
> ABI.

I know.  I meant for you to look at the very end of the message (The 
part where I said to store it in the slots for k0 or k1).

David Daney.