From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Ishizaki Kou <kou.ishizaki@toshiba.co.jp>
Cc: linuxppc-dev@ozlabs.org, paulus@samba.org, arnd@arndb.de
Subject: Re: [PATCH 1/7] PowerPC64: Not to insert EA=0 entry at
Date: Fri, 28 Sep 2007 08:37:09 +1000 [thread overview]
Message-ID: <1190932629.6158.37.camel@pasglop> (raw)
In-Reply-To: <1190931617.6158.29.camel@pasglop>
> It should have been set in setup_64.c, in setup_paca() (which is called
> twice) in that statement:
>
> local_paca = &paca[cpu];
>
> As local_paca is defined as being a variable held in register r13. Maybe
> something bad's happening with the compiler ?
Can you check early_setup disassembly, see if r13 is assigned (it should
be in two spots) and if it's clobbered by the compiler somewhere ?
Also, you may want to try adding --ffixed-r13 to the CFLAGS in the
makefile and let us know if it makes a difference... r13 is marked
reserved by the ABI but segher seems to imply that gcc may decide to ues
it anyway (ouch !)
Ben.
next prev parent reply other threads:[~2007-09-27 22:37 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-27 8:01 [PATCH 1/7] PowerPC64: Not to insert EA=0 entry at kou.ishizaki
2007-09-27 8:18 ` Benjamin Herrenschmidt
2007-09-27 11:22 ` Ishizaki Kou
2007-09-27 22:08 ` Benjamin Herrenschmidt
2007-09-27 22:20 ` Benjamin Herrenschmidt
2007-09-27 22:37 ` Benjamin Herrenschmidt [this message]
2007-09-28 8:04 ` Ishizaki Kou
2007-09-28 9:29 ` Benjamin Herrenschmidt
2007-09-28 16:33 ` Segher Boessenkool
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