src/sys/amd64/linux32, branch main

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

sysent: retire unused SV_IA32

2025-06-03T22:59:30Z

When COMPAT_IA32 was generaliaed to COMPAT_FREEBSD32 in 2010 (commit 841c0c7ec75b), all runtime uses of SV_IA32 were removed in favor of SV_ILP32 check. Given SV_ILP32's existance it makes no sense to dynamically check for SV_IA32 (even if we had a 32-bit x86 ABI with 64-bit time_t we needed to differentiate, SV_IA32 would be the wrong spelling.) As such, remove SV_IA32 and mark the bit reserved. Reviewed by: kib Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D50672

amd64: add pcb_tlsbase

2025-05-28T11:11:23Z

This is a value for TLS base that would be explicitly set by user. It is forced into the fsbase register on entry to signal handler, making TLS in the handler usable even if userspace uses segmentation. Reported and tested: Alex S Tested by: pho Reviewed by: olce Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D50482