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>
In AArch64, pages may be 4K or 64K depending on kernel configuration.
The GNU C Library documentation suggests [1], "the correct interface
to query about the page size is sysconf". Introduce one new
architecture-specific function-like macro, page_size(), that on x86
and AArch32 remains a constant so as to minimally affect performance,
but on AArch64 is sysconf(_SC_PAGESIZE) for correctness.
1. https://www.gnu.org/software/libc/manual/html_node/Query-Memory-Parameters.html
To minimize churn, the PAGE_SIZE macro is left as a build-time
estimation of what the run-time page size might be.
This fixes the following errors for CRIU on AArch64 kernels with
CONFIG_ARM64_64K_PAGES=y, allowing dump of
`setsid sleep < /dev/null &> /dev/null` to succeed.
Error (kerndat.c:48): Can't stat self map_files: No such file or directory
Error (util.c:668): Can't read pme for pid 90: No such file or directory
Error (parasite-syscall.c:1135): Can't open 89/map_files/0x3ffb7da0000-0x3ffb7dac000 on procfs: No such file or directory
Signed-off-by: Christopher Covington <cov@codeaurora.org>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This patch moves the files arch/$ARCH/include/asm/int.h to
include/asm-generic/int.h and makes the types {u,s}{8,16,32}
be aliases of the fixed sized integer types [u]int{8,16,32}_t.
This makes it possible to use single set of integer typedefs
in all architectural ports.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
The implementation of bit operations for ARM isn't actually
architecture-specific so it would rather be shared with
the upcoming port for AArch64 that won't provide optimized
implementation of bit operations.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Reviewed-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
At the moment we are using 4K pages all the time,
so instead of copying code over all archs we're
supporting -- add asm-generic/page.h header.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
There will be a couple of more builtin helpers needed
in pie code soon. Thus to unify approach do
- rename asm/memcpy_64.h to asm/string.h
- introduce include/asm-generic/string.h file
where all helpers are implemented if optimized
variant is not yet provided
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
