linux-toradex.git/tools/objtool/sync-check.sh, branch v5.5-rc7

x86: xen: insn: Decode Xen and KVM emulate-prefix signature

2019-10-17T19:31:57+00:00

Decode Xen and KVM's emulate-prefix signature by x86 insn decoder.
It is called "prefix" but actually not x86 instruction prefix, so
this adds insn.emulate_prefix_size field instead of reusing
insn.prefixes.

If x86 decoder finds a special sequence of instructions of
XEN_EMULATE_PREFIX and 'ud2a; .ascii "kvm"', it just counts the
length, set insn.emulate_prefix_size and fold it with the next
instruction. In other words, the signature and the next instruction
is treated as a single instruction.

Signed-off-by: Masami Hiramatsu 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Josh Poimboeuf 
Cc: Juergen Gross 
Cc: x86@kernel.org
Cc: Boris Ostrovsky 
Cc: Ingo Molnar 
Cc: Stefano Stabellini 
Cc: Andrew Cooper 
Cc: Borislav Petkov 
Cc: xen-devel@lists.xenproject.org
Cc: Randy Dunlap 
Link: https://lkml.kernel.org/r/156777564986.25081.4964537658500952557.stgit@devnote2

objtool: Ignore intentional differences for the x86 insn decoder

2019-09-01T01:27:52+00:00

Since we need to build this in !x86, we need to explicitely use the x86
files, not things like asm/insn.h, so we intentionally differ from the
master copy in the kernel sources, add -I diff directives to ignore just
these differences when checking for drift.

Acked-by: Josh Poimboeuf 
Link: http://lore.kernel.org/lkml/20190830193109.p7jagidsrahoa4pn@treble
Acked-by: Masami Hiramatsu 
Cc: Adrian Hunter 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra (Intel) 
Link: https://lkml.kernel.org/n/tip-j965m9b7xtdc83em3twfkh9o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

objtool: Update sync-check.sh from perf's check-headers.sh

2019-09-01T01:27:52+00:00

To allow using the -I trick that will be needed for checking the x86
insn decoder files.

Without the specific -I lines we still get the same warnings as before:

  $ make -C tools/objtool/ clean ; make -C tools/objtool/
  make: Entering directory '/home/acme/git/perf/tools/objtool'
    CLEAN    objtool
  find  -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
  rm -f arch/x86/inat-tables.c fixdep
  
    LD       objtool-in.o
  make[1]: Leaving directory '/home/acme/git/perf/tools/objtool'
  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/inat.h' differs from latest version at 'arch/x86/include/asm/inat.h'
  diff -u tools/arch/x86/include/asm/inat.h arch/x86/include/asm/inat.h
  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/insn.h' differs from latest version at 'arch/x86/include/asm/insn.h'
  diff -u tools/arch/x86/include/asm/insn.h arch/x86/include/asm/insn.h
  Warning: Kernel ABI header at 'tools/arch/x86/lib/inat.c' differs from latest version at 'arch/x86/lib/inat.c'
  diff -u tools/arch/x86/lib/inat.c arch/x86/lib/inat.c
  Warning: Kernel ABI header at 'tools/arch/x86/lib/insn.c' differs from latest version at 'arch/x86/lib/insn.c'
  diff -u tools/arch/x86/lib/insn.c arch/x86/lib/insn.c
  /home/acme/git/perf/tools/objtool
    LINK     objtool
  make: Leaving directory '/home/acme/git/perf/tools/objtool'
  $

The next patch will add the -I lines for those files.

Acked-by: Josh Poimboeuf 
Link: http://lore.kernel.org/lkml/20190830193109.p7jagidsrahoa4pn@treble
Acked-by: Masami Hiramatsu 
Cc: Adrian Hunter 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra (Intel) 
Link: https://lkml.kernel.org/n/tip-vu3p38mnxlwd80rlsnjkqcf2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

objtool: Move x86 insn decoder to a common location

2019-09-01T01:27:52+00:00

The kernel tree has three identical copies of the x86 instruction
decoder.  Two of them are in the tools subdir.

The tools subdir is supposed to be completely standalone and separate
from the kernel.  So having at least one copy of the kernel decoder in
the tools subdir is unavoidable.  However, we don't need *two* of them.

Move objtool's copy of the decoder to a shared location, so that perf
will also be able to use it.

Signed-off-by: Josh Poimboeuf 
Reviewed-by: Masami Hiramatsu 
Acked-by: Peter Zijlstra (Intel) 
Cc: Adrian Hunter 
Cc: Jiri Olsa 
Cc: x86@kernel.org
Link: http://lore.kernel.org/lkml/55b486b88f6bcd0c9a2a04b34f964860c8390ca8.1567118001.git.jpoimboe@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo

objtool: Move kernel headers/code sync check to a script

2017-11-07T09:48:34+00:00

Replace the nasty diff checks in the objtool Makefile with a clean bash
script, and make the warnings more specific.

Heavily inspired by tools/perf/check-headers.sh.

Suggested-by: Ingo Molnar 
Signed-off-by: Josh Poimboeuf 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/ab015f15ccd8c0c6008493c3c6ee3d495eaf2927.1509974346.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar