[CRIU] [PATCH 00/16] Preparations for x86-32 CRIU mode, v2

[Cyrill Gorcunov]

Hi! Here is a slightly updated version of preparatory code for
x86-32 mostly. Which it turns out suitable as well for ppc64.

The idea is to use side tool (piegen) which parses generated
parasite blobs and creates byte-stream of code to run with
additional relocation data (if needed).

Previously our blobs were generated by linker but this
doesn't work for x86 32bit due to lack of rip addressing
so we have to switch to another scheme.

Note that at moment this code only runs if criu is built as

	ARCH="ia32" make

Laurent what about ppc64, does piegen run always?

Also note that I didn't modify TASK_SIZE for 32bit
need to think. But I would prefer the code to merge
since it become harder to keep it out of three.

So, take a look, comments are welcome!

Cyrill Gorcunov (13):
  piegen: Implement tool building, v2
  x86: Start using native object relocatable files in parasite code
  arch: x86-32 syscalls -- Wire in syscalls generation
  x86: Add 32bit variant of TASK_SIZE
  pie: x86-32 -- Build parasite code without PIC
  pie: x86-32 -- Prepare parasite head
  arch: x86-32 -- Be able to build 32bit CRIU
  pie: x86 -- Adjust size of parasite and restorer code
  pie: piegen, x86 -- Fix relocs application
  pie: x86 -- Do a real call for applying relocations
  pie: piegen -- Slightly rework the building procedure
  pie: piegen -- Add PIE_SIZE helper
  pie: Use PIE_SIZE helper

Laurent Dufour (3):
  ppc64: pie -- Move the TOC in its own section
  ppc64: pie -- Add ppc64le relocation's processing
  pie: piegen -- Only copy required sections

 Makefile                                  |  29 +-
 Makefile.crtools                          |   1 +
 arch/ppc64/crtools.c                      |   5 +
 arch/ppc64/include/asm/restore.h          |  13 +-
 arch/ppc64/misc.S                         | 197 ++++++++++++
 arch/ppc64/parasite-head.S                |  26 +-
 arch/ppc64/restorer-trampoline.S          |  33 --
 arch/ppc64/vdso-pie.c                     |  37 ---
 arch/x86/Makefile                         |  18 ++
 arch/x86/include/asm/parasite.h           |   4 +
 arch/x86/include/asm/restore.h            |   9 +
 arch/x86/include/asm/restorer.h           |  31 +-
 arch/x86/include/asm/syscall32.h          |  25 ++
 arch/x86/include/asm/types.h              |  10 +-
 arch/x86/parasite-head.S                  |  23 ++
 arch/x86/restorer.c                       |   3 +-
 arch/x86/syscalls/syscall-common-x86-32.S |  36 +++
 arch/x86/syscalls/syscall32.c             |  85 +++++
 arch/x86/syscalls/syscall_32.tbl          |  88 ++++++
 arch/x86/vdso-pie.c                       |  29 ++
 cr-restore.c                              |   7 +-
 parasite-syscall.c                        |  10 +-
 pie/Makefile                              |  50 ++-
 pie/parasite.c                            |   6 +-
 pie/pie-reloc.lds.S.in                    |  30 ++
 pie/pie-relocs.c                          |  47 +++
 pie/pie-relocs.h                          |  17 +
 pie/piegen/Makefile                       |  17 +
 pie/piegen/elf-ppc64.c                    |  16 +
 pie/piegen/elf-x86-32.c                   |  16 +
 pie/piegen/elf-x86-64.c                   |  16 +
 pie/piegen/elf.c                          | 495 ++++++++++++++++++++++++++++++
 pie/piegen/main.c                         | 137 +++++++++
 pie/piegen/piegen.h                       |  37 +++
 pie/piegen/uapi/types.h                   |  15 +
 35 files changed, 1511 insertions(+), 107 deletions(-)
 create mode 100644 arch/ppc64/misc.S
 delete mode 100644 arch/ppc64/restorer-trampoline.S
 create mode 100644 arch/x86/include/asm/syscall32.h
 create mode 100644 arch/x86/syscalls/syscall-common-x86-32.S
 create mode 100644 arch/x86/syscalls/syscall32.c
 create mode 100644 arch/x86/syscalls/syscall_32.tbl
 create mode 100644 pie/pie-reloc.lds.S.in
 create mode 100644 pie/pie-relocs.c
 create mode 100644 pie/pie-relocs.h
 create mode 100644 pie/piegen/Makefile
 create mode 100644 pie/piegen/elf-ppc64.c
 create mode 100644 pie/piegen/elf-x86-32.c
 create mode 100644 pie/piegen/elf-x86-64.c
 create mode 100644 pie/piegen/elf.c
 create mode 100644 pie/piegen/main.c
 create mode 100644 pie/piegen/piegen.h
 create mode 100644 pie/piegen/uapi/types.h

-- 
2.4.2