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Date: Fri, 16 Aug 2019 13:23:45 +0100
From: Raphael Gault <raphael.gault@....com>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
jpoimboe@...hat.com
Cc: peterz@...radead.org, catalin.marinas@....com, will.deacon@....com,
julien.thierry.kdev@...il.com, raph.gault+kdev@...il.com,
Raphael Gault <raphael.gault@....com>
Subject: [RFC v4 00/18] objtool: Add support for arm64
Hi,
Changes since RFC V3:
* Rebased on tip/master: Switch/jump table had been refactored
* Take Catalin Marinas comments into account regarding the asm macro for
marking exceptions.
As of now, objtool only supports the x86_64 architecture but the
groundwork has already been done in order to add support for other
architectures without too much effort.
This series of patches adds support for the arm64 architecture
based on the Armv8.5 Architecture Reference Manual.
Objtool will be a valuable tool to progress and provide more guarentees
on live patching which is a work in progress for arm64.
Once we have the base of objtool working the next steps will be to
port Peter Z's uaccess validation for arm64.
Raphael Gault (18):
objtool: Add abstraction for computation of symbols offsets
objtool: orc: Refactor ORC API for other architectures to implement.
objtool: Move registers and control flow to arch-dependent code
objtool: arm64: Add required implementation for supporting the aarch64
architecture in objtool.
objtool: special: Adapt special section handling
objtool: arm64: Adapt the stack frame checks for arm architecture
objtool: Introduce INSN_UNKNOWN type
objtool: Refactor switch-tables code to support other architectures
gcc-plugins: objtool: Add plugin to detect switch table on arm64
objtool: arm64: Implement functions to add switch tables alternatives
arm64: alternative: Mark .altinstr_replacement as containing
executable instructions
arm64: assembler: Add macro to annotate asm function having non
standard stack-frame.
arm64: sleep: Prevent stack frame warnings from objtool
arm64: kvm: Annotate non-standard stack frame functions
arm64: kernel: Add exception on kuser32 to prevent stack analysis
arm64: crypto: Add exceptions for crypto object to prevent stack
analysis
arm64: kernel: Annotate non-standard stack frame functions
objtool: arm64: Enable stack validation for arm64
arch/arm64/Kconfig | 1 +
arch/arm64/crypto/Makefile | 3 +
arch/arm64/include/asm/alternative.h | 2 +-
arch/arm64/kernel/Makefile | 3 +
arch/arm64/kernel/hyp-stub.S | 3 +
arch/arm64/kernel/sleep.S | 5 +
arch/arm64/kvm/hyp-init.S | 3 +
arch/arm64/kvm/hyp/entry.S | 3 +
include/linux/frame.h | 19 +-
scripts/Makefile.gcc-plugins | 2 +
scripts/gcc-plugins/Kconfig | 9 +
.../arm64_switch_table_detection_plugin.c | 58 +
tools/objtool/Build | 2 -
tools/objtool/arch.h | 19 +
tools/objtool/arch/arm64/Build | 8 +
tools/objtool/arch/arm64/arch_special.c | 165 +
tools/objtool/arch/arm64/bit_operations.c | 67 +
tools/objtool/arch/arm64/decode.c | 2815 +++++++++++++++++
.../objtool/arch/arm64/include/arch_special.h | 52 +
.../arch/arm64/include/asm/orc_types.h | 96 +
.../arch/arm64/include/bit_operations.h | 24 +
tools/objtool/arch/arm64/include/cfi.h | 74 +
.../objtool/arch/arm64/include/insn_decode.h | 210 ++
tools/objtool/arch/arm64/orc_dump.c | 26 +
tools/objtool/arch/arm64/orc_gen.c | 40 +
tools/objtool/arch/x86/Build | 3 +
tools/objtool/arch/x86/arch_special.c | 107 +
tools/objtool/arch/x86/decode.c | 16 +
tools/objtool/arch/x86/include/arch_special.h | 45 +
tools/objtool/{ => arch/x86/include}/cfi.h | 0
tools/objtool/{ => arch/x86}/orc_dump.c | 4 +-
tools/objtool/{ => arch/x86}/orc_gen.c | 104 +-
tools/objtool/check.c | 309 +-
tools/objtool/check.h | 10 +
tools/objtool/elf.c | 3 +-
tools/objtool/orc.h | 4 +-
tools/objtool/special.c | 28 +-
tools/objtool/special.h | 13 +-
38 files changed, 4129 insertions(+), 226 deletions(-)
create mode 100644 scripts/gcc-plugins/arm64_switch_table_detection_plugin.c
create mode 100644 tools/objtool/arch/arm64/Build
create mode 100644 tools/objtool/arch/arm64/arch_special.c
create mode 100644 tools/objtool/arch/arm64/bit_operations.c
create mode 100644 tools/objtool/arch/arm64/decode.c
create mode 100644 tools/objtool/arch/arm64/include/arch_special.h
create mode 100644 tools/objtool/arch/arm64/include/asm/orc_types.h
create mode 100644 tools/objtool/arch/arm64/include/bit_operations.h
create mode 100644 tools/objtool/arch/arm64/include/cfi.h
create mode 100644 tools/objtool/arch/arm64/include/insn_decode.h
create mode 100644 tools/objtool/arch/arm64/orc_dump.c
create mode 100644 tools/objtool/arch/arm64/orc_gen.c
create mode 100644 tools/objtool/arch/x86/arch_special.c
create mode 100644 tools/objtool/arch/x86/include/arch_special.h
rename tools/objtool/{ => arch/x86/include}/cfi.h (100%)
rename tools/objtool/{ => arch/x86}/orc_dump.c (98%)
rename tools/objtool/{ => arch/x86}/orc_gen.c (66%)
--
2.17.1
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