| To: | machael thailer <dony.he@huawei.com> |
|---|---|
| Subject: | Re: questions about eret.... |
| From: | Ralf Baechle <ralf@oss.sgi.com> |
| Date: | Tue, 21 Aug 2001 13:17:21 +0200 |
| Cc: | linux-mips@oss.sgi.com |
| In-reply-to: | <001201c12a29$57f3b660$8021690a@huawei.com>; from dony.he@huawei.com on Tue, Aug 21, 2001 at 06:09:19PM +0800 |
| References: | <000701c12529$e1640580$8021690a@huawei.com> <20010815103314.A11966@bacchus.dhis.org> <000b01c1295e$0f2174c0$8021690a@huawei.com> <20010820230755.A11242@dea.linux-mips.net> <001501c129dd$8acebb80$8021690a@huawei.com> <20010821083508.A13302@dea.linux-mips.net> <001201c12a29$57f3b660$8021690a@huawei.com> |
| Sender: | owner-linux-mips@oss.sgi.com |
| User-agent: | Mutt/1.2.5i |
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 |
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