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- No distinction between 'special' and 'normal' memory accesses.
- No reliance on caller-supplied %cr2 value
- Memory operations include segment identifier to allow callers
to support non-zero-based segments
TODO:
1. HVM emulations should take into account segment base, limit, and
attributes.
2. We ought to obey stack-size attribute on PUSH/POP instructions.
Could extend the mode input field, or could add an extra call-out
hook, or perhaps we don't care at all...
Signed-off-by: Keir Fraser <keir@xensource.com>
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faulting memory access was to/from an implicit memory operand
(typically either an instruction fetch or stack access).
Rationalise use of macros for page fault error code flags.
This patch supercedes the fix in changeset 11242.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Fix the test harness for x86/64 -- map emulated addresses
to low 4GB of address space.
Signed-off-by: Keir Fraser <keir@xensource.com>
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into a context structure. This context can then be handed to
callback operations.
Based on an original patch from Mats Petersson <mats.petersson@amd.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
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Signed-off-by: Keir Fraser <keir@xensource.com>
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* Move .PHONY directives next to targets,
this makes them a lot harder to miss
* Add missing .PHONY directives
* Remove nonexistent .PHONY directives
* Hopefully I didn'T miss anything...
Signed-Off-By: Horms <horms@verge.net.au>
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protection when building vmxassist/hvmloader.
Signed-off-by: Keir Fraser <keir@xensource.com>
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the X86EMUL_MODE enumeration.
Signed-off-by: Keir Fraser <keir@xensource.com>
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instructions to the generic x86 emulator. Also add
preliminary support for 16-bit addressing: decode the
ModR/M byte properly but still need to access and update
implicit memory operands (esp,esi,edi) with correct width.
Work is also needed to support real-mode addressing.
Signed-off-by: Keir Fraser <keir@xensource.com>
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location in libxc directory. Not direct from xen and
xenlinux build trees! Also fix a type name in
x86_emulator test harness.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Fix XCHG instruction emulation.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Add CMPXCHG8B support to the instruction emulator.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Linux 2.6 now always uses writable page tables (even SMP builds). Also
use native definitions for atomic read-modify-write operations on
ptes. Fixed instruction emulator in Xen.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Tidy the x86 emulator interface, and use it from within the
writable pagetable algorithm to deal with otherwise unhandleable cases.
For example: L1 mapped at multiple L2 slots; L1 that maps itself; L1
that also maps the code making the update, or the kernel stack.
This provides a proof-of-concept for the emulator that can be picked
up for the VMX code to improve the device-model emulation.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Begin integrating new instruction decoder and emulator.
Signed-off-by: Keir Fraser <keir@xensource.com>
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