This patchset enables and implements objtool --mcount
option on powerpc. This applies atop powerpc/merge branch.
Changelog:
v4:
* Patch 11/16 - Introduce a new config option
CONFIG_HAVE_OBJTOOL_NOP_MCOUNT as a means for
architectures to enable nop'ing ftrace locations.
- Remove Acked-by tag from Peter Zijlstra (Intel),
and Reviewed-by tag from Christophe Leroy.
[This is done because I reworked the patch to add
a new config option to objtool. Please let me know
if you want me to retain the tags. Thanks!]
* Patch 16/16 - Rework the patch to handle only 'bl' instruction
decoding.
v3:
* Patch 01/16 - Rework patch subject.
- Rework changelog.
- Add Reviewed-by tag from Christophe Leroy.
* Patch 02/16 - Rework changelog to update details based on feedback
from Nicholas Piggin and Michael Ellerman.
- Use quotes instead of __stringify macro, based on
suggestion from Christophe Leroy.
* Patch 03/16 - Add Reviewed-by tag from Christophe Leroy.
- Based on Christophe's suggestion, keep all
before .
- Rework changelog.
* Patch 04/16 - Add Reviewed-by tag from Christophe Leroy.
* Patch 05/16 - Add Reviewed-by tag from Christophe Leroy.
* Patch 06/16 - No change.
* Patch 07/16 - Add Reviewed-by tag from Christophe Leroy.
* Patch 08/16 - Add Acked-by tag from Peter Zijlstra.
* Patch 09/16 - Add Acked-by tag from Peter Zijlstra.
* Patch 10/16 - Reorder local variable declarations to use reverse
xmas tree format.
- Add Signed-off-by tag from Sathvika Vasireddy indicating
changes done.
- Add Acked-by tag from Peter Zijlstra.
* Patch 11/16 - Update changelog to indicate that powerpc kernel does
not support nop'ed out ftrace locations.
- Add Acked-by tag from Peter Zijlstra.
- Add Reviewed-by tag from Christophe Leroy.
* Patch 12/16 - Per Christophe's comment, rework changelog.
* Patch 13/16 - Add Acked-by tag from Peter Zijlstra.
- Add Reviewed-by tag from Christophe Leroy.
* Patch 14/16 - Simplify arch_ftrace_match() function, based on
Christophe's suggestion.
- Add Reviewed-by tag from Christophe Leroy.
* Patch 15/16 - Include code from Christophe Leroy to use local vars for
type and imm, and to adapt len for prefixed
instructions.
* Patch 16/16 - Based on suggestion from Christophe Leroy, setup
immediate value calculation outside the check for
specific instruction under case 18.
- Set instruction type to INSN_CALL for 'bla'
instruction as well.
v2:
* Change subject of patch 01/16
* As suggested by Christophe Leroy, add barrier_before_unreachable()
before __builtin_unreachable() to work around a gcc problem.
* Fix issues reported by Kernel Test Robot.
* Include suggestions from Christophe Leroy, and change commit
messages for patches 01/16, 02/16, 03/16, 05/16.
Christophe Leroy (4):
objtool: Fix SEGFAULT
objtool: Use target file endianness instead of a compiled constant
objtool: Use target file class size instead of a compiled constant
powerpc: Fix objtool unannotated intra-function call warnings on PPC32
Sathvika Vasireddy (12):
powerpc: Fix __WARN_FLAGS() for use with Objtool
powerpc: Override __ALIGN and __ALIGN_STR macros
powerpc: Fix objtool unannotated intra-function call warnings
powerpc: Curb objtool unannotated intra-function warnings
powerpc: Skip objtool from running on drivers/crypto/vmx/aesp8-ppc.o
powerpc: Skip objtool from running on VDSO files
objtool: Add --mnop as an option to --mcount
objtool: Read special sections with alts only when specific options are
selected
objtool: Use macros to define arch specific reloc types
objtool: Add arch specific function arch_ftrace_match()
objtool/powerpc: Enable objtool to be built on ppc
objtool/powerpc: Add --mcount specific implementation
Makefile | 4 +-
arch/powerpc/Kconfig | 2 +
arch/powerpc/include/asm/asm.h| 7 ++
arch/powerpc/include/asm/bug.h| 3 +-
arch/powerpc/include/asm/linkage.h| 3 +
arch/powerpc/kernel/cpu_setup_6xx.S | 26 +++--
arch/powerpc/kernel/cpu_setup_fsl_booke.S | 8 +-
arch/powerpc/kernel/entry_32.S| 9 +-
arch/powerpc/kernel/entry_64.S| 2 +
arch/powerpc/kernel/exceptions-64s.S | 7 +-
arch/powerpc/kernel/head_40x.S| 5 +-
arch/powerpc/kernel/head_64.S | 7 +-
arch/powerpc/kernel/head_8xx.S| 5 +-
arch/powerpc/kernel/head_book3s_32.S | 29
