This adds SECCOMP_FILTER support for sparc32 on top of Stian Halseth's
sparc64 series (v2):
https://lore.kernel.org/r/[email protected]
Patch 1 splits syscall_trace() into syscall_trace_enter() and
syscall_trace_leave() as on sparc64 and most other architectures.
Patch 2 adds a call to seccomp_permit_syscall() in syscall_trace_enter()
to filter system calls. A denied syscall skips the call and goes
through the syscall exit work with the return value already set.
Patch 3 extends the seccomp_bpf selftest's SPARC support to sparc32.
Testing:
seccomp_bpf on v7.3-rc1 with the whole seccomp series applied on a
GR-CPCI-GR740 board from Frontgrade Gaisler:
- UP: pass:99 fail:0 skip:12
- SMP with out-of-tree patches that implement the futex atomic
operations with CASA on LEON: pass:99 fail:0 skip:12
- SMP without them: pass:89 fail:10 skip:12.
FUTEX depends on !(SPARC32 && SMP) (see 3f2bedabb62c) and glibc aborts
with "The futex facility returned an unexpected error code" in the 10
tests that use threads (KILL_thread,
user_notification_filter_empty_threaded, tsync_vs_dead_thread_leader and
the 7 TSYNC tests).
The 12 skipped tests need the UPROBES which sparc32 does not have.
Ludwig Rydberg (3):
sparc32: Split common syscall_trace() to syscall_trace_{enter|leave}()
sparc32: add seccomp filter support
selftests/seccomp: add sparc32 support
arch/sparc/Kconfig | 2 +-
arch/sparc/include/asm/thread_info_32.h | 2 +
arch/sparc/kernel/entry.S | 33 ++++++++--------
arch/sparc/kernel/kernel.h | 3 +-
arch/sparc/kernel/ptrace_32.c | 26 ++++++++-----
tools/testing/selftests/seccomp/seccomp_bpf.c | 38 +++++++++++++------
6 files changed, 66 insertions(+), 38 deletions(-)
base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
prerequisite-patch-id: 5772aba3cb572833df13529ec6bb03ae9e848e25
prerequisite-patch-id: 70a54ba398c763e45f9332ff4cc06b3f2a3e7825
--
2.35.3
