Hi Konrad,
On 07/04/16 04:49, Konrad Rzeszutek Wilk wrote:
During execution of the hypervisor we have two regions of
executable code - stext -> _etext, and _sinittext -> _einitext.
The later is not needed after bootup.
We also have various built-in macros and functions to search
in between those two swaths depending on the state of the system.
That is either for bug_frames, exceptions (x86) or symbol
names for the instruction.
With xSplice in the picture - we need a mechansim for new payloads
NIT: s/mechansim/mechanism/
to searched as well for all of this.
Originally we had extra 'if (xsplice)...' but that gets
a bit tiring and does not hook up nicely.
This 'struct virtual_region' and virtual_region_list provide a
mechanism to search for the bug_frames, exception table,
and symbol names entries without having various calls in
other sub-components in the system.
Code which wishes to participate in bug_frames and exception table
entries search has to only use two public APIs:
- register_virtual_region
- unregister_virtual_region
to let the core code know.
If the ->lookup_symbol is not then the default internal symbol lookup
mechanism is used.
Suggested-by: Andrew Cooper <andrew.coop...@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
For the ARM parts:
Acked-by: Julien Grall <julien.gr...@arm.com>
Regards,
--
Julien Grall
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