lkml.org 
[lkml]   [2022]   [Mar]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[RFC PATCH 0/3] objtool: Add mcount sub-command
Date
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

\
 
 \ /
  Last update: 2022-03-18 11:56    [W:0.217 / U:0.444 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site