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