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[Qemu-devel] phys_page_find bug?
From: |
Artyom Tarasenko |
Subject: |
[Qemu-devel] phys_page_find bug? |
Date: |
Fri, 7 May 2010 18:26:38 +0200 |
phys_page_find (exec.c) returns sometimes a page for addresses where
nothing is connected.
One example, done with qemu-system-sparc -M SS-20
ok f13ffff0 2f spacec@ .
// The address translates correctly, in cpu_physical_memory_rw
// addr== 0xff13ffff0 (where nothing is connected)
// but then phys_page_find returns a nonzero and produces
Unassigned mem read access of 1 byte to 0000000ff15ffff0 from xxxxx
(note the "5" in the line above where "3" is expected)
I wonder if this is only true for non-wired addresses, or whether
phys_page_find can also
find wrong pages for the addresses where something is connected?
Or is my assumption is wrong and phys_page_find can return a page for
not-connected
addresses and the bug is actually in cpu_physical_memory_rw ?
Is the qemu algorithm of working with the physical address space
described somewhere?
--
Regards,
Artyom Tarasenko
solaris/sparc under qemu blog: http://tyom.blogspot.com/
- [Qemu-devel] phys_page_find bug?,
Artyom Tarasenko <=