[PATCH v5 00/16] objtool: Enable and implement --mcount option on powerpc

From: Sathvika Vasireddy
Date: Fri Oct 28 2022 - 10:35:00 EST

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This patchset enables and implements objtool --mcount
option on powerpc. This applies atop powerpc/merge branch.

Changelog:

----
v5:

* Patch 02/16 - Add Reviewed-by tag from Christophe Leroy

* Patch 03/16 - Fix merge conflicts with latest powerpc/merge branch

* Patch 06/16 - Files arch/powerpc/kernel/cpu_setup_fsl_booke.S and
arch/powerpc/kernel/head_fsl_booke.S are not present
today. Removed annotations in those assembly files.

* Patch 11/16 - Add Reviewed-by tag from Christophe Leroy
- Changed scripts/Makefile.lib file to make
CONFIG_HAVE_OBJTOOL_NOP_MCOUNT depend on
CONFIG_FTRACE_MCOUNT_USE_OBJTOOL.

* Patch 12/16 - Add Reviewed-by tag from Christophe Leroy

* Patch 16/16 - Add Reviewed-by tag from Christophe Leroy

* For this series - Add Acked-by tag from Josh Poimboeuf
- Add Tested-by tag from Naveen N. Rao
- Add Reviewed-by tag from Naveen N. Rao
----
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 <linux/...>
before <asm/...>.
- 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/entry_32.S | 9 +-
arch/powerpc/kernel/entry_64.S | 2 +
arch/powerpc/kernel/exceptions-64s.S | 4 +-
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 +++--
arch/powerpc/kernel/misc_64.S | 4 +-
arch/powerpc/kernel/swsusp_32.S | 5 +-
arch/powerpc/kernel/vdso/Makefile | 2 +
arch/powerpc/kernel/vector.S | 4 +-
arch/powerpc/kvm/book3s_hv_interrupts.S | 4 +-
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 25 +++--
arch/powerpc/kvm/fpu.S | 17 ++-
arch/powerpc/platforms/52xx/lite5200_sleep.S | 15 ++-
arch/x86/Kconfig | 1 +
drivers/crypto/vmx/Makefile | 2 +
kernel/trace/Kconfig | 7 ++
scripts/Makefile.lib | 3 +
tools/objtool/arch/powerpc/Build | 2 +
tools/objtool/arch/powerpc/decode.c | 101 ++++++++++++++++++
.../arch/powerpc/include/arch/cfi_regs.h | 11 ++
tools/objtool/arch/powerpc/include/arch/elf.h | 10 ++
.../arch/powerpc/include/arch/special.h | 21 ++++
tools/objtool/arch/powerpc/special.c | 19 ++++
tools/objtool/arch/x86/decode.c | 5 +
tools/objtool/arch/x86/include/arch/elf.h | 2 +
.../arch/x86/include/arch/endianness.h | 9 --
tools/objtool/builtin-check.c | 14 +++
tools/objtool/check.c | 53 ++++-----
tools/objtool/elf.c | 8 +-
tools/objtool/include/objtool/arch.h | 2 +
tools/objtool/include/objtool/builtin.h | 1 +
tools/objtool/include/objtool/elf.h | 8 ++
tools/objtool/include/objtool/endianness.h | 32 +++---
tools/objtool/orc_dump.c | 11 +-
tools/objtool/orc_gen.c | 4 +-
tools/objtool/special.c | 3 +-
44 files changed, 408 insertions(+), 103 deletions(-)
create mode 100644 arch/powerpc/include/asm/asm.h
create mode 100644 tools/objtool/arch/powerpc/Build
create mode 100644 tools/objtool/arch/powerpc/decode.c
create mode 100644 tools/objtool/arch/powerpc/include/arch/cfi_regs.h
create mode 100644 tools/objtool/arch/powerpc/include/arch/elf.h
create mode 100644 tools/objtool/arch/powerpc/include/arch/special.h
create mode 100644 tools/objtool/arch/powerpc/special.c
delete mode 100644 tools/objtool/arch/x86/include/arch/endianness.h

--
2.31.1

Next message: Sathvika Vasireddy: "[PATCH v5 03/16] powerpc: Fix objtool unannotated intra-function call warnings"
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