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Author SHA1 Message Date
Cyrill Gorcunov
76df6d9ed5 syscalls: Add sys_prctl helper 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 16:39:21 +04:00
Cyrill Gorcunov
b50ee4a175 Update kernel area 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 15:16:06 +04:00
Cyrill Gorcunov
83c209ef07 Move vma prot setup into parsing helper 
To shrink restorer code.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 13:54:01 +04:00
Cyrill Gorcunov
35502c4564 restore: Add PROT_GROWSDOWN for stack area 
Since we stick with x86 for a while.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 13:48:10 +04:00
Cyrill Gorcunov
0355f1d23a dump: Don't fail on dumping paths for anon shared mappings 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 13:25:15 +04:00
Cyrill Gorcunov
c07a4b2caa restore: Don't forget to close file descriptors on VMAs 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 12:20:28 +04:00
Cyrill Gorcunov
b9d0883d76 dump: Anonymous shared mappings should have MAP_ANONYMOUS flag 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 12:19:43 +04:00
Cyrill Gorcunov
20c3bf1033 restore: 32k of stack memory is enough 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 01:44:40 +04:00
Cyrill Gorcunov
099c9c0016 dump: Don't forget to save MAP_ANONYMOUS if it was there 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-08 00:39:21 +04:00
Cyrill Gorcunov
275e97c77d restore: Increase the stack size for cloned processes 
Wasted a couple of hours trying to resolve this non-obvious
issue. It's because bootstrapping the restorer code might
requre more memory than 16K on stack. Strictly speaking
we need a compile time constant here and BUG_ON.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 22:58:18 +04:00
Cyrill Gorcunov
b78c664bca restore: Fixup pstree reading 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 20:18:38 +04:00
Cyrill Gorcunov
3b7a4cbe09 restorer: Start using sigreturn_restore 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 19:14:28 +04:00
Cyrill Gorcunov
7e481f89f9 restore: Add GS-TLS handling 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 17:44:24 +04:00
Cyrill Gorcunov
da8f61c1c8 dump: Add GS-TLS handling 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 17:44:00 +04:00
Cyrill Gorcunov
1f7018a15c restore: Update fsindex and fs base in sake of TLS 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 17:34:59 +04:00
Cyrill Gorcunov
8a8850d146 dump: Dump TLS via sys_arch_prctl 
As such -- no need for kernel patch.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 16:29:36 +04:00
Cyrill Gorcunov
3725fd326d syscalls: Add sys_arch_prctl helper 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 15:24:07 +04:00
Cyrill Gorcunov
d6e7afe3d8 syscalls: Add sys_set/get_thread_area helpers 
They are actually banned in kernel for now, but
we might end up needing them, so better to have
them in-place.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-07 14:47:04 +04:00
Cyrill Gorcunov
cb7a9a524d restore: Add restorer bootstrap mmap hint 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-06 01:49:57 +04:00
Cyrill Gorcunov
b69aeb9a26 restore: Don't continue on opening vmas file failure 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-05 01:39:21 +04:00
Cyrill Gorcunov
34c72fc9f6 restore: Add some more debug printing 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-04 18:45:47 +04:00
Cyrill Gorcunov
bf30aa1130 restore: Drop unused struct partial_pt_regs 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-03 19:31:07 +04:00
Cyrill Gorcunov
2ae009ac1b restore: Don't forget to free temporary self VMAs 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-03 19:11:27 +04:00
Cyrill Gorcunov
9e5b145aff restore: Drop dead code, comments 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-03 18:24:23 +04:00
Cyrill Gorcunov
f63777d2be restorer: Setup rt_sigframe to a proper address 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-03 15:24:40 +04:00
Cyrill Gorcunov
345834ecee test: Add prints out in static test 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-03 15:24:08 +04:00
Cyrill Gorcunov
489745f235 restore: A number of fixups and debug printing 
An idea is to align restorer size to be sure it
wont be stripped in a middle of code.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-03 11:58:45 +04:00
Cyrill Gorcunov
ed3c4fbacf syscalls: Get rid of mnemonic names for registers 
Use explicit registers name instead just to be sure it
wont cause side effects on most gcc versions.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-11-03 11:55:29 +04:00
Cyrill Gorcunov
48371f729a test: Add static sleep test 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-31 20:37:50 +04:00
Cyrill Gorcunov
6898d7f113 restore: Drop a few more write_hex_n 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-31 18:35:16 +04:00
Cyrill Gorcunov
6a3c7ab3b9 restore: Drop no longer needed printing 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-31 18:19:53 +04:00
Cyrill Gorcunov
bf41dcac48 syscalls: Get rid of register variables 
It's been found that gcc 4.1.2 20080704 (Red Hat 4.1.2-48)
ignores register variables so to be on a safe side rewrite
syscalls with inline assembly without them.

nb: gcc version 4.6.1 20110908 (Red Hat 4.6.1-9) (GCC)
compiles them correctly.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-31 16:33:43 +04:00
Cyrill Gorcunov
5b6748b4c9 restore: Call for sigreturn 
Prepare the stack value and do a syscall.
Still it fails because of stack corruption
I think and due to lack of setup of several
important values on thread-info area.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-29 20:42:45 +04:00
Cyrill Gorcunov
a50600c7f4 restore: Copy gprs to frame 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-29 01:43:43 +04:00
Cyrill Gorcunov
b99eae2809 restore: Add some more structures for frame setup 
Some of them are already in system header files
but until I debug all things I simply picked up
kernel's definitions just to be more-less safe.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-29 01:13:32 +04:00
Cyrill Gorcunov
a74f379d60 syscall: Add sys_unlink 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-28 14:03:59 +04:00
Cyrill Gorcunov
b9004db89f restore: Align self-length on 16 bytes bound 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-28 00:47:56 +04:00
Cyrill Gorcunov
040131fd3b restore: Print out current pid in testing purpose 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-28 00:40:41 +04:00
Cyrill Gorcunov
98cf8f1a0f syscall: Add getpid syscall 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-28 00:40:20 +04:00
Cyrill Gorcunov
50d6423bc1 restore: Handle read-only VMAs 
If VMA is read-only we need to make it
writable while read its contents, then
we should drop write permission.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-28 00:27:03 +04:00
Cyrill Gorcunov
5f91037703 restore: Implement local_sleep helper 
Use it instead of pause insns to not burn cpu cycles.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-27 23:15:11 +04:00
Cyrill Gorcunov
8523721592 restore: Use MAP_ANONYMOUS for VMAs mapping for testing purpose 
While files are not restored yet this flag is needed.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-27 23:01:34 +04:00
Cyrill Gorcunov
1cf388798d restorer: More readable tracepoints 
And a pause at the end.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-27 19:55:42 +04:00
Cyrill Gorcunov
3c88046a18 restorer: Start real mapping restore procedure 
At moment fails, but just to have a reference point.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-27 19:39:08 +04:00
Cyrill Gorcunov
4907896e4c restore: Don't unmap special areas until they are handled properly 
Note for testing purpose a pause issued at the end.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-27 19:09:33 +04:00
Cyrill Gorcunov
dfe814aa58 restore: Unmap running VMAs 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-27 18:59:21 +04:00
Cyrill Gorcunov
44596497e3 restorer: Handle error case in restorer code 
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-27 15:34:21 +04:00
Cyrill Gorcunov
57971f721d restorer: Some preliminary work initiated on mmap heuristics 
Just to not lose the snippet.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-27 00:57:01 +04:00
Cyrill Gorcunov
aaf3291e00 restore: Dump current VMAs 
Restorer needs to know which VMAs
to unmap before map a new set.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-26 22:50:46 +04:00
Cyrill Gorcunov
2cc7488de2 dump: Make VMA parsing to handle absence of map_files 
Needed in testing purposes. Also make free_mappings
being a global one (will need it in restorer).

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
 2011-10-26 22:48:10 +04:00