src/sys/amd64/linux, branch main

linux: Fix some problems with header pollution

2026-05-15T00:39:25Z

- Avoid including sys/proc.h in linux_vdso_gtod.c. It's not needed, but the implicit inclusion of sys/param.h via sys/ucred.h->bsm/audit.h was bringing in some required definitions. - Include a couple of required headers: sys/time.h (for struct bintime), and limits.h (for INT_MAX). - Move some helpers from linux.h, which depend on sys/param.h for NODEV, to the one CU where they're actually used. No functional change intended. Reviewed by: imp, kib, emaste MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D56982

linux: address executable stack warnings

2026-05-11T05:39:27Z

Mark assembly files as not requiring executable stacks. This still leaves linux32_vdso.so without a .note.GNU-stack section in the gcc build for now. Reviewed by: imp, kib Differential Revision: https://reviews.freebsd.org/D56894

linux: Ignore sigaction(2) flags SA_UNSUPPORTED and SA_EXPOSE_TAGBITS

2026-04-27T11:50:39Z

SA_UNSUPPORTED was introduced in Linux 5.11 to probe support for other flags such as SA_EXPOSE_TAGBITS, introduced at the same time. Ignore both. Signed-off-by: Ricardo Branco PR: 289285 Reviewed by: pouria, kib Pull-Request: https://github.com/freebsd/freebsd-src/pull/2163

linux: make sysent for membarrier

2026-04-22T19:16:44Z

Regenerate linux syscall prototypes for membarrier(2). Signed-off-by: Ricardo Branco PR: 281691 Reviewed by: kib, pouria Pull-Request: https://github.com/freebsd/freebsd-src/pull/2147

linux: Add support for membarrier(2)

2026-04-22T19:15:30Z

FreeBSD has a native membarrier(2) syscall which is mostly compatible with Linux. This is a thin wrapper around kern_membarrier() that translates all available commands and flags. Also update the syscalls.master prototypes to match the Linux 5.10+ three-argument form. Pre-5.10 binaries using the two-argument form continue to work: cpu_id is only consulted for RSEQ commands, which FreeBSD does not support and which kern_membarrier() rejects with EINVAL, matching Linux semantics. Signed-off-by: Ricardo Branco PR: 281691 Reviewed by: kib, pouria Pull-Request: https://github.com/freebsd/freebsd-src/pull/2147

imgact: Mark brandinfo and note structures as const

2025-10-14T13:32:25Z

No functional change intended. Reviewed by: olce, kib, emaste MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D53062

linux: Regenerate system call definitions

2025-07-04T14:42:34Z

linux: Add inotify support

2025-07-04T14:42:34Z

Implement the Linux inotify system calls using the native implementation in vfs_inotify.c. PR: 240874 Reviewed by: brooks MFC after: 3 months Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D50761

sys: Add AT_HWCAP3 and AT_HWCAP4

2025-06-24T16:26:40Z

It is likely we will need these on arm64. Add them in preparation for flags in these to be added at some point in the future. Reviewed by: brooks, imp, kib Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D51005

machine/stdarg.h -> sys/stdarg.h

2025-06-11T16:39:02Z

Switch to using sys/stdarg.h for va_list type and va_* builtins. Make an attempt to insert the include in a sensible place. Where style(9) was followed this is easy, where it was ignored, aim for the first block of sys/*.h headers and don't get too fussy or try to fix other style bugs. Reviewed by: imp Exp-run by: antoine (PR 286274) Pull Request: https://github.com/freebsd/freebsd-src/pull/1595