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Hi Keir:
I am sorry trouble you
again. I want to emulate instruction "push %ebp" in Xen. I found the function
emulate_privilege_op does not satisfy this requirement.
Then I resort to x86_emulate. I
construct the x86_emulate_ctxt and reuse the "ptwr_emulate_ops".
code like this:
extern const struct x86_emulate_ops ptwr_emulate_ops;
in do_general_protection {
....
struct x86_emulate_ctxt ctxt;
ctxt.regs = regs;
ctxt.force_writeback = 1; // 0 is the
same
ctxt.addr_size = 32;
ctxt.sp_size = 32;
ret = x86_emulate(&ctxt, &ptwr_emulate_ops);
...
}
the error message is:
(XEN) mm.c:5235:d0 ptwr_emulate: bad access (cr2=553a4000, addr=e81b5fac, bytes=4)
I have another idea, I directly update the stack
and change the EIP and ESP
like this:
regs->esp -= 4;
__raw_copy_to_guest((void*)regs->esp, ®s->ebp, sizeof(unsigned int));
regs->eip += 1;
I am not sure it works like this way. Please give
me some tips. Thanks
Cheers,
Yueqiang
2010-08-13
strongerwill
发件人： Keir Fraser
发送时间：
2010-08-13 16:52:24
收件人：
xen-devel@xxxxxxxxxxxxxxxxxxx
抄送：
主题： [Xen-devel]
FINAL release candidate for Xen 4.0.1
Folks,
The sixth release candidate for 4.0.1 is tagged as 4.0.1-rc6 at
http://xenbits.xen.org/staging/xen-4.0-testing.hg
We expect this to be the final RC, with no changes except for regression
fixes ahead of final release late next week. So please test this RC!
Thanks,
Keir
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