From: Sathvika Vasireddy <sv@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: peterz@infradead.org, linux-kernel@vger.kernel.org,
rostedt@goodmis.org, aik@ozlabs.ru, sv@linux.ibm.com,
jpoimboe@redhat.com, naveen.n.rao@linux.vnet.ibm.com
Subject: [RFC PATCH 0/3] objtool: Add mcount sub-command
Date: Fri, 18 Mar 2022 16:21:37 +0530 [thread overview]
Message-ID: <20220318105140.43914-1-sv@linux.ibm.com> (raw)
This patchset adds support to implement 'objtool mcount' command.
Right now, objtool is built if CONFIG_STACK_VALIDATION is enabled.
And, '__mcount_loc' section is generated by objtool when --mcount
option is passed to check sub-command.
For architectures to be able to generate '__mcount_loc' section
without having to do stack validation, introduce 'mcount' as
a sub-command to objtool. This way, objtool is built for mcount
if CONFIG_FTRACE_MCOUNT_USE_OBJTOOL is enabled. Additionally,
architectures can select HAVE_NOP_MCOUNT to be able to nop out
mcount call sites.
TODO: Enable "objtool mcount" for clang LTO builds.
Sathvika Vasireddy (3):
objtool: Move common code to utils.c
objtool: Enable and implement 'mcount' subcommand
objtool/mcount: Add powerpc specific functions
Makefile | 6 +
arch/powerpc/Kconfig | 1 +
arch/x86/Kconfig | 3 +-
scripts/Makefile.build | 12 +
tools/objtool/Build | 3 +
tools/objtool/Makefile | 8 +-
tools/objtool/arch/powerpc/Build | 1 +
tools/objtool/arch/powerpc/decode.c | 51 +++++
.../arch/powerpc/include/arch/cfi_regs.h | 37 +++
tools/objtool/arch/powerpc/include/arch/elf.h | 8 +
tools/objtool/builtin-mcount.c | 74 ++++++
tools/objtool/check.c | 178 +--------------
tools/objtool/include/objtool/builtin.h | 4 +-
tools/objtool/include/objtool/check.h | 2 -
tools/objtool/include/objtool/objtool.h | 1 +
tools/objtool/include/objtool/utils.h | 28 +++
tools/objtool/mcount.c | 138 ++++++++++++
tools/objtool/objtool.c | 1 +
tools/objtool/orc_gen.c | 1 +
tools/objtool/utils.c | 210 ++++++++++++++++++
tools/objtool/weak.c | 5 +
21 files changed, 590 insertions(+), 182 deletions(-)
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/builtin-mcount.c
create mode 100644 tools/objtool/include/objtool/utils.h
create mode 100644 tools/objtool/mcount.c
create mode 100644 tools/objtool/utils.c
--
2.31.1
WARNING: multiple messages have this Message-ID (diff)
From: Sathvika Vasireddy <sv@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: jpoimboe@redhat.com, peterz@infradead.org,
linux-kernel@vger.kernel.org, aik@ozlabs.ru, mpe@ellerman.id.au,
rostedt@goodmis.org, naveen.n.rao@linux.vnet.ibm.com,
sv@linux.ibm.com
Subject: [RFC PATCH 0/3] objtool: Add mcount sub-command
Date: Fri, 18 Mar 2022 16:21:37 +0530 [thread overview]
Message-ID: <20220318105140.43914-1-sv@linux.ibm.com> (raw)
This patchset adds support to implement 'objtool mcount' command.
Right now, objtool is built if CONFIG_STACK_VALIDATION is enabled.
And, '__mcount_loc' section is generated by objtool when --mcount
option is passed to check sub-command.
For architectures to be able to generate '__mcount_loc' section
without having to do stack validation, introduce 'mcount' as
a sub-command to objtool. This way, objtool is built for mcount
if CONFIG_FTRACE_MCOUNT_USE_OBJTOOL is enabled. Additionally,
architectures can select HAVE_NOP_MCOUNT to be able to nop out
mcount call sites.
TODO: Enable "objtool mcount" for clang LTO builds.
Sathvika Vasireddy (3):
objtool: Move common code to utils.c
objtool: Enable and implement 'mcount' subcommand
objtool/mcount: Add powerpc specific functions
Makefile | 6 +
arch/powerpc/Kconfig | 1 +
arch/x86/Kconfig | 3 +-
scripts/Makefile.build | 12 +
tools/objtool/Build | 3 +
tools/objtool/Makefile | 8 +-
tools/objtool/arch/powerpc/Build | 1 +
tools/objtool/arch/powerpc/decode.c | 51 +++++
.../arch/powerpc/include/arch/cfi_regs.h | 37 +++
tools/objtool/arch/powerpc/include/arch/elf.h | 8 +
tools/objtool/builtin-mcount.c | 74 ++++++
tools/objtool/check.c | 178 +--------------
tools/objtool/include/objtool/builtin.h | 4 +-
tools/objtool/include/objtool/check.h | 2 -
tools/objtool/include/objtool/objtool.h | 1 +
tools/objtool/include/objtool/utils.h | 28 +++
tools/objtool/mcount.c | 138 ++++++++++++
tools/objtool/objtool.c | 1 +
tools/objtool/orc_gen.c | 1 +
tools/objtool/utils.c | 210 ++++++++++++++++++
tools/objtool/weak.c | 5 +
21 files changed, 590 insertions(+), 182 deletions(-)
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/builtin-mcount.c
create mode 100644 tools/objtool/include/objtool/utils.h
create mode 100644 tools/objtool/mcount.c
create mode 100644 tools/objtool/utils.c
--
2.31.1
next reply other threads:[~2022-03-18 21:46 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-18 10:51 Sathvika Vasireddy [this message]
2022-03-18 10:51 ` [RFC PATCH 0/3] objtool: Add mcount sub-command Sathvika Vasireddy
2022-03-18 10:51 ` [RFC PATCH 1/3] objtool: Move common code to utils.c Sathvika Vasireddy
2022-03-18 10:51 ` Sathvika Vasireddy
2022-03-23 18:02 ` Miroslav Benes
2022-03-23 18:02 ` Miroslav Benes
2022-03-18 10:51 ` [RFC PATCH 2/3] objtool: Enable and implement 'mcount' subcommand Sathvika Vasireddy
2022-03-18 10:51 ` Sathvika Vasireddy
2022-03-21 7:06 ` Christophe Leroy
2022-03-21 8:19 ` Naveen N. Rao
2022-03-21 8:19 ` Naveen N. Rao
2022-03-21 8:26 ` Christophe Leroy
2022-03-21 8:26 ` Christophe Leroy
2022-03-21 9:48 ` Naveen N. Rao
2022-03-21 9:48 ` Naveen N. Rao
2022-03-18 10:51 ` [RFC PATCH 3/3] objtool/mcount: Add powerpc specific functions Sathvika Vasireddy
2022-03-18 10:51 ` Sathvika Vasireddy
2022-03-18 12:26 ` Peter Zijlstra
2022-03-18 12:26 ` Peter Zijlstra
2022-03-18 13:59 ` Christophe Leroy
2022-03-18 13:59 ` Christophe Leroy
2022-03-21 2:27 ` Michael Ellerman
2022-03-21 6:47 ` Christophe Leroy
2022-03-21 7:46 ` Christophe Leroy
2022-03-21 7:56 ` Christophe Leroy
2022-03-21 8:30 ` Christophe Leroy
2022-03-21 8:59 ` Christophe Leroy
2022-03-26 7:58 ` Christophe Leroy
2022-03-26 7:58 ` Christophe Leroy
2022-03-21 6:25 ` Naveen N. Rao
2022-03-21 6:25 ` Naveen N. Rao
2022-03-27 9:09 ` Christophe Leroy
2022-03-27 9:09 ` Christophe Leroy
2022-03-28 19:59 ` Josh Poimboeuf
2022-03-28 19:59 ` Josh Poimboeuf
2022-03-28 20:14 ` Peter Zijlstra
2022-03-28 20:14 ` Peter Zijlstra
2022-03-28 20:15 ` Peter Zijlstra
2022-03-28 20:15 ` Peter Zijlstra
2022-03-28 20:21 ` Josh Poimboeuf
2022-03-28 20:21 ` Josh Poimboeuf
2022-03-29 12:01 ` Michael Ellerman
2022-03-29 12:01 ` Michael Ellerman
2022-03-29 17:32 ` Christophe Leroy
2022-03-30 4:26 ` Josh Poimboeuf
2022-03-30 4:26 ` Josh Poimboeuf
2022-03-30 18:40 ` Naveen N. Rao
2022-03-30 18:40 ` Naveen N. Rao
2022-05-12 14:52 ` Christophe Leroy
2022-05-12 14:52 ` Christophe Leroy
2022-05-12 15:12 ` Josh Poimboeuf
2022-05-12 15:12 ` Josh Poimboeuf
2022-05-21 9:38 ` Christophe Leroy
2022-05-21 9:38 ` Christophe Leroy
2022-05-21 10:57 ` Peter Zijlstra
2022-05-21 10:57 ` Peter Zijlstra
2022-05-23 5:39 ` Naveen N. Rao
2022-05-23 5:39 ` Naveen N. Rao
2022-03-19 1:35 ` [RFC PATCH 0/3] objtool: Add mcount sub-command Josh Poimboeuf
2022-03-19 1:35 ` Josh Poimboeuf
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