On 2025-07-03 17:00:14+0100, Mark Brown wrote:
I had cause to look at the vfork() support for GCS and realised that we don't have any direct test coverage, this series does so by adding vfork() to nolibc and then using that in basic-gcs to provide some simple vfork() coverage.
Thanks. I applied the patches, but moved the arm64 selftest patch to be the last one.
FYI nolibc now has a proper prctl() implementation you might want to use. Also your vfork() selftest uncovered a bug in the brandnew SuperH support.
Signed-off-by: Mark Brown broonie@kernel.org
Changes in v3:
- Stylistic nits in the GCS vfork() test.
- SPARC has a non-standard vfork() ABI which needs handling.
- Link to v2: https://lore.kernel.org/r/20250610-arm64-gcs-vfork-exit-v2-0-929443dfcf82@ke...
Changes in v2:
- Add replacement of ifdef with if defined() in nolibc since the code doesn't reflect the coding style.
- Remove check for arch specific vfork().
- Link to v1: https://lore.kernel.org/r/20250609-arm64-gcs-vfork-exit-v1-0-baad0f085747@ke...
Mark Brown (4): tools/nolibc: Replace ifdef with if defined() in sys.h tools/nolibc: Provide vfork() kselftest/arm64: Add a test for vfork() with GCS selftests/nolibc: Add coverage of vfork()
tools/include/nolibc/arch-sparc.h | 16 +++++++ tools/include/nolibc/sys.h | 59 ++++++++++++++++++------- tools/testing/selftests/arm64/gcs/basic-gcs.c | 63 +++++++++++++++++++++++++++ tools/testing/selftests/nolibc/nolibc-test.c | 23 ++++++++-- 4 files changed, 142 insertions(+), 19 deletions(-)
base-commit: 86731a2a651e58953fc949573895f2fa6d456841 change-id: 20250528-arm64-gcs-vfork-exit-4a7daf7652ee
Best regards,
Mark Brown broonie@kernel.org