From: Ralf Baechle <ralf@oss.sgi.com>
To: machael thailer <dony.he@huawei.com>
Cc: linux-mips@oss.sgi.com
Subject: Re: questions about eret....
Date: Tue, 21 Aug 2001 13:17:21 +0200 [thread overview]
Message-ID: <20010821131721.F13302@dea.linux-mips.net> (raw)
In-Reply-To: <001201c12a29$57f3b660$8021690a@huawei.com>; from dony.he@huawei.com on Tue, Aug 21, 2001 at 06:09:19PM +0800
On Tue, Aug 21, 2001 at 06:09:19PM +0800, machael thailer wrote:
> Yes.
> But in the sourece codes, when we finish the exception handlers , we will
> run "ret_from_irq" (ret_from_sys_call) in the entry.S and then run macro
> "RESTORE_ALL_AND_RET". The macro does restore all registers and then ERET.
> But there is not a "CLI" just before ERET as the user manual suggested. Why?
> so when we handle a syscall exception, we do "STI" in the handle_sys(). and
> when ret_from_sys_call and we will run this macro "RESTORE_ALL_AND_RET".
> because there is not a "CLI" just before ERET , is it possible to have some
> problems?
Look again.
Ralf
next prev parent reply other threads:[~2001-08-21 11:19 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-15 1:30 Virtual address to physical address mapping machael thailer
2001-08-15 1:30 ` machael thailer
2001-08-15 8:33 ` Ralf Baechle
2001-08-20 9:54 ` questions about eret machael thailer
2001-08-20 9:54 ` machael thailer
2001-08-20 21:07 ` Ralf Baechle
2001-08-21 1:06 ` machael thailer
2001-08-21 1:06 ` machael thailer
2001-08-21 6:35 ` Ralf Baechle
2001-08-21 10:09 ` machael thailer
2001-08-21 10:09 ` machael thailer
2001-08-21 11:17 ` Ralf Baechle [this message]
2001-08-21 15:17 ` Question on porting Linux Shuanglin Wang
2001-08-21 14:33 ` jeff_lee
2001-08-21 14:33 ` jeff_lee
2001-08-21 15:33 ` Shuanglin Wang
2001-08-21 17:26 ` Jun Sun
2001-08-21 20:26 ` Carsten Langgaard
2001-08-21 21:36 ` Shuanglin Wang
2001-08-22 9:58 ` Carsten Langgaard
2001-08-21 1:34 ` questions about some bits of STATUS register and exception priority machael thailer
2001-08-21 1:34 ` machael thailer
2001-08-21 6:53 ` Ralf Baechle
2001-08-21 10:53 ` machael thailer
2001-08-21 10:53 ` machael thailer
2001-08-21 11:14 ` Ralf Baechle
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