| From: |
| Mathieu Desnoyers <mathieu.desnoyers-AT-efficios.com> |
| To: |
| Thomas Gleixner <tglx-AT-linutronix.de> |
| Subject: |
| [RFC PATCH 00/15] rseq uapi and selftest updates |
| Date: |
| Mon, 24 Jan 2022 12:12:38 -0500 |
| Message-ID: |
| <20220124171253.22072-1-mathieu.desnoyers@efficios.com> |
| Cc: |
| linux-kernel-AT-vger.kernel.org, Peter Zijlstra <peterz-AT-infradead.org>, "Paul E . McKenney" <paulmck-AT-kernel.org>, Boqun Feng <boqun.feng-AT-gmail.com>, "H . Peter Anvin" <hpa-AT-zytor.com>, Paul Turner <pjt-AT-google.com>, linux-api-AT-vger.kernel.org, Shuah Khan <shuah-AT-kernel.org>, linux-kselftest-AT-vger.kernel.org, Mathieu Desnoyers <mathieu.desnoyers-AT-efficios.com> |
| Archive-link: |
| Article |
Update the rseq selftests to adapt to the userspace ABI chosen by glibc
(will be released in February 2022). Provide a fallback implementation
to work with older glibc as well.
Remove broken 32-bit little/big endian accessor fields in rseq uapi.
Integrate various fixes gathered from librseq, including work-around for
known gcc and clang compiler bugs with asm goto.
The uplift to glibc's userspace ABI means we can now use %fs/%gs segment
selectors directly in the inline assembler for accesses to the rseq
thread area on x86.
Feedback is welcome,
Thanks,
Mathieu
Mathieu Desnoyers (15):
selftests/rseq: introduce own copy of rseq uapi header
rseq: Remove broken uapi field layout on 32-bit little endian
selftests/rseq: Remove useless assignment to cpu variable
selftests/rseq: Remove volatile from __rseq_abi
selftests/rseq: Introduce rseq_get_abi() helper
selftests/rseq: Introduce thread pointer getters
selftests/rseq: Uplift rseq selftests for compatibility with
glibc-2.35
selftests/rseq: Fix ppc32: wrong rseq_cs 32-bit field pointer on big
endian
selftests/rseq: Fix ppc32 missing instruction selection "u" and "x"
for load/store
selftests/rseq: Fix ppc32 offsets by using long rather than off_t
selftests/rseq: Fix warnings about #if checks of undefined tokens
selftests/rseq: Remove arm/mips asm goto compiler work-around
selftests/rseq: Fix: work-around asm goto compiler bugs
selftests/rseq: x86-64: use %fs segment selector for accessing rseq
thread area
selftests/rseq: x86-32: use %gs segment selector for accessing rseq
thread area
include/uapi/linux/rseq.h | 17 +-
tools/testing/selftests/rseq/Makefile | 2 +-
.../selftests/rseq/basic_percpu_ops_test.c | 2 +-
tools/testing/selftests/rseq/compiler.h | 30 +++
tools/testing/selftests/rseq/param_test.c | 8 +-
tools/testing/selftests/rseq/rseq-abi.h | 151 +++++++++++++
tools/testing/selftests/rseq/rseq-arm.h | 110 +++++-----
tools/testing/selftests/rseq/rseq-arm64.h | 79 +++++--
.../rseq/rseq-generic-thread-pointer.h | 25 +++
tools/testing/selftests/rseq/rseq-mips.h | 71 ++-----
.../selftests/rseq/rseq-ppc-thread-pointer.h | 30 +++
tools/testing/selftests/rseq/rseq-ppc.h | 128 +++++++----
tools/testing/selftests/rseq/rseq-s390.h | 55 +++--
tools/testing/selftests/rseq/rseq-skip.h | 2 +-
.../selftests/rseq/rseq-thread-pointer.h | 19 ++
.../selftests/rseq/rseq-x86-thread-pointer.h | 40 ++++
tools/testing/selftests/rseq/rseq-x86.h | 200 ++++++++++++------
tools/testing/selftests/rseq/rseq.c | 163 +++++++-------
tools/testing/selftests/rseq/rseq.h | 29 ++-
19 files changed, 793 insertions(+), 368 deletions(-)
create mode 100644 tools/testing/selftests/rseq/compiler.h
create mode 100644 tools/testing/selftests/rseq/rseq-abi.h
create mode 100644 tools/testing/selftests/rseq/rseq-generic-thread-pointer.h
create mode 100644 tools/testing/selftests/rseq/rseq-ppc-thread-pointer.h
create mode 100644 tools/testing/selftests/rseq/rseq-thread-pointer.h
create mode 100644 tools/testing/selftests/rseq/rseq-x86-thread-pointer.h
--
2.17.1
