Since crtools is no more linked with object build for the
parasite/restorer blob, it no more needs the builtin memory services.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
The commit ba74350954 which introduces support for Altivec and VSX
support was breaking the checkpoint --leave-running.
The root cause is that the address of the Altivec and VSX registers in the
signal frame should be computed for the stack in the context of the
checkpointed process.
This patch fixes this issue through the sigreturn_prep_fpu_frame which is
designed to update the signal frame based on the remote address.
Fixes: ba74350954 ("ppc64: Add Altivec and VSX support")
Reported-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Tested-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
There were multiple copy of the same code spread over the different
architectures handling the vDSO.
This patch is merging the duplicated code in arch/*/vdso-pie.c and
arch/*/include/asm/vdso.h in the common files and let only the architecture
specific part in the arch/*/* files.
The file are now organized this way:
include/asm-generic/vdso.h
contains basic definition which could be overwritten by
architectures.
arch/*/include/asm/vdso.h
contains per architecture definitions.
It may includes include/asm-generic/vdso.h
pie/util-vdso.c
include/util-vdso.h
These files contains code and definitions common to both criu and
the parasite code.
The file include/util-vdso.h includes arch/*/include/asm/vdso.h.
pie/parsite-vdso.c
include/parasite-vdso.h
contains code and definition specific to the parasite code handling
the vDSO.
The file include/parasite-vdso.h includes include/util-vdso.h.
arch/*/vdso-pie.c
contains the architecture specific code installing the vDSO
trampoline.
vdso.c
include/vdso.h
contains code and definition specific to the criu code handling the
vDSO.
The file include/vdso.h includes include/util-vdso.h.
CC: Christopher Covington <cov@codeaurora.org>
CC: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
The commit 69d008d567 ("Use run-time page_size() for mremap")
introduces the use of dynamic page size in rst-malloc.c.
The commit also add the include of unistd.h in
arch/aarch64/include/asm/page.h to allow the build to succeed on this
architecture. Since ppc64 is also using the same way to deal with page
size, the same include is required in arch/ppc64/include/asm/page.h
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
CC: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
If we want one CRIU binary to work across all AArch64 kernel
configurations, a single task size value cannot be hard coded.
Signed-off-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
The initial support of the SYS V shared memory on ppc64 is broken. The call
to shmat done in the restore blob has no chance to work correctly.
This patch fixes the sys_shmat call.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This cleans the assembly code, removing no more needed trick with the
register 2 (TOC pointer). As a consequence, the __export_restore_task_trampoline()
and __export_unmap_trampoline() are no more needed.
Thus, the changes introduced by the commit de9df91002 ("Per architecture restorer
trampolines") in cr-restore.c are no more used but are not impacting
runtime code anyway.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Introduce optimized bit operation for PowerPc
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Instead of belonging to the common C memcmp() function, belong on the
optimized one stolen from the kernel.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Instead of belonging to the common C memcpy function, belong on the
optimized one stolen from the kernel.
Cc: Anton Blanchard <anton@au.ibm.com>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Add various register definition to clean the assembly code.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Page size may change, so page size should be read through sysconf.
Suggested-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Fixing comment leading to think that 32bit tasks are supported, which is
not the case.
For the record, ppc64le is not supporting 32bit task, while ppc64 (the Big
Endian architecture) has an option to support 32bit task but CRIU doesn't
yet run on ppc64.
Reported-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Some architectures like ppc64 requires a trampoline to be called prior to
the standard restorer services.
This patch introduces 3 trampolines which can be overwritten by
architectures in arch/x/include/asm/restore.h:
- arch_export_restore_thread
- arch_export_restore_task
- arch_export_unmap
The architecture which doesn't need to overwrite them, has nothing to do.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This patch initiates the ppc64le architecture support in CRIU.
Note that ppc64 (Big Endian) architecture is not yet supported since there
are still several issues to address with this architecture. However, in the
long term, the two architectures should be addressed using the almost the
same code, so sharing the ppc64 directory.
Major ppc64 issues:
Loader is not involved when the parasite code is loaded. So no relocation
is done for the parasite code. As a consequence r2 must be set manually
when entering the parasite code, and GOT is not filled.
Furthermore, the r2 fixup code at the services's global address which has
not been fixed by the loader should not be run. Branching at local address,
as the assembly code does is jumping over it.
On the long term, relocation should be done when loading the parasite code.
We are introducing 2 trampolines for the 2 entry points of the restorer
blob. These entry points are dealing with r2. These ppc64 specific entry
points are overwritting the standard one in sigreturn_restore() from
cr-restore.c. Instead of using #ifdef, we may introduce a per arch wrapper
here.
CRIU needs 2 kernel patches to be run powerpc which are not yet upstream:
- Tracking the vDSO remapping
- Enabling the kcmp system call on powerpc
Feature not yet supported:
- Altivec registers C/R
- VSX registers C/R
- TM support
- all lot of things I missed..
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
