en Copyright 2015 Java http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#bdb561843e865eaa5bbdc5394ed9d9c91136240c linux: implement pkey_alloc, pkey_free and pkey_mprotectBridge the Linux memory protection key syscalls to FreeBSD's nativeMPK support instead of returning ENOSYS. Modern Linux softwareprobes these at startup: Chromium-based browsers (found viawww/linux-brave) use protection keys for V8's heap and JITsandboxing, and glibc >= 2.27 exposes the full API.pkey_alloc() allocates from a per-process bitmap kept in the processemuldata (key 0 implicitly allocated, matching Linux'smm_pkey_allocation_map; ENOSPC once keys 1..15 are exhausted or whenPKU is absent, as Linux returns on such hardware) and applies therequested initial access rights to the calling thread's PKRU, locatedin the XSAVE area via xsave_area_offset(). pkey_free() isbookkeeping only: as on Linux, freeing neither untags pages norupdates PKRU. pkey_mprotect() performs the protection change andtags the range through amd64_pkru_update(), factored out ofsysarch(2)'s AMD64_SET_PKRU/AMD64_CLEAR_PKRU implementation so thatboth share the same argument checking and map read locksynchronization with a parallel pmap_vmspace_copy() on fork; tags diewith the mapping, matching Linux VMA semantics. A pkey of -1degrades to plain mprotect.The allocation map is inherited on fork and reset on exec. At execthe Linux sysvecs initialize PKRU to 0x55555554, Linux's init_pkrudefault (access disabled for keys 1..15), so memory tagged with anot yet allocated key is inaccessible to threads that were nevergranted rights -- the property V8's thread isolation relies on.Setting PKRU at exec initializes the user FPU state slightly earlierthan the lazy first-use path; the state would be initialized momentslater in rtld/libc startup regardless. Protection key faultsalready deliver SEGV_PKUERR through the existing siginfotranslation.The common code carries no architecture ifdefs. Machine-dependentstate lives in struct linux_pemuldata_md, embedded in the processemuldata in the manner of struct mdthread, and common code callsper-arch lifecycle hooks (linux_pemuldata_init_md/_exec_md) and pkeyback ends after performing the parameter validation Linux appliesregardless of hardware support. On amd64 the implementation livesin sys/amd64/linux/linux_pkru.c, compiled into linux_common andserving both the 64-bit and 32-bit Linux ABIs. Elsewhere (arm64,i386) linux_emul_md.c provides stubs returning what Linux returns onhardware without protection keys (ENOSPC from pkey_alloc;pkey_mprotect with a pkey of -1 acts as plain mprotect), soapplications take their normal no-PKU fallback instead of the ENOSYSpath.PR: 297427MFC after: 1 monthReviewed by: kibDifferential Revision: https://reviews.freebsd.org/D58782 List of files: /freebsd/sys/modules/linux_common/Makefile Sun, 16 Aug 2026 02:58:19 +0200 Devin Teske <dteske@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#3e2093de47251de5e6e61c08d2955251137afd01 linux: Add required symbol to EXPORT_SYMS listPR: 291270 List of files: /freebsd/sys/modules/linux_common/Makefile Fri, 28 Nov 2025 22:25:26 +0100 Ed Maste <emaste@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#fbf05d2147b1add8b760be166c4b1fd4499ebce8 linux: separate all ifnet(9) related code into linux_ifnet.cRemove linux_use_real_ifname(). It is no longer used outside of thefile since 3ab3c9c29cf0. There is no functional change.Reviewed by: melifaro, dchaginDifferential Revision: https://reviews.freebsd.org/D54076 List of files: /freebsd/sys/modules/linux_common/Makefile Mon, 08 Dec 2025 18:20:14 +0100 Gleb Smirnoff <glebius@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#e9ac41698b2f322d55ccf9da50a3596edb2c1800 Remove residual blank line at start of MakefileThis is a residual of the $FreeBSD$ removal.MFC After: 3 days (though I'll just run the command on the branches)Sponsored by: Netflix List of files: /freebsd/sys/modules/linux_common/Makefile Mon, 15 Jul 2024 06:46:32 +0200 Warner Losh <imp@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#ab393e9548f8cc0ee28499c411963b798ebb38a5 netlink: move NETLINK define to opt_global.hMove the NETLINK define into opt_global.h so we can rely on it beingset correctly, without having to remember to include opt_netlink.h.This ensures that the NETLINK define is correctly set. If not wemay end up with unloadable modules, due to missing symbols (such asnlmsg_get_group_writer).PR: 274306Reviewed by: imp, markjMFC after: 3 daysDifferential Revision: https://reviews.freebsd.org/D42179 List of files: /freebsd/sys/modules/linux_common/Makefile Thu, 12 Oct 2023 21:55:57 +0200 Kristof Provost <kp@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#031beb4e239bfce798af17f5fe8dba8bcaf13d99 sys: Remove $FreeBSD$: one-line sh patternRemove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/ List of files: /freebsd/sys/modules/linux_common/Makefile Wed, 16 Aug 2023 19:54:58 +0200 Warner Losh <imp@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#c4299cec48a51996ec0bc076e5818438243e4041 linux(4): Make linux_emul_path privateThere is no need to refer to linux_emul_path from outside anymore.MFC after: 2 month List of files: /freebsd/sys/modules/linux_common/Makefile Mon, 29 May 2023 10:19:08 +0200 Dmitry Chagin <dchagin@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#960562652c7a92b8dc97a63105b04e3548f8408c linux(4): Fix opt_netlink.h inclusionAdd opt_netlink.h to the linux_common module, on i386, where we don'tuses linux_common module, move opt_netlink.h inclusion underi386 condition.MFC after: 2 weeks List of files: /freebsd/sys/modules/linux_common/Makefile Fri, 31 Mar 2023 13:56:59 +0200 Dmitry Chagin <dchagin@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#c19fc5cd9b49115604ce2b89279e3434c7f120cc linux_common: Fixup .PATH.Since we have arm64, and awaiting ppc64 Linuxulator, do not include x86 specificpath to the module build for non x86 architectures.MFC after: 1 week List of files: /freebsd/sys/modules/linux_common/Makefile Sat, 28 Jan 2023 18:31:38 +0100 Dmitry Chagin <dchagin@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#010175a76d0676ff8d9b8d54276aff093abbc3f2 modules: Add missing opt_*.h files for stand-alone compileStandalone compile that we at least create these opt_*.h files.Sponsored by: Netflix List of files: /freebsd/sys/modules/linux_common/Makefile Sat, 29 Oct 2022 16:49:20 +0200 Warner Losh <imp@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#7c40e2d5f68516dd402073b28095ea5516fe3114 linuxolator: add netlink supportAdd the glue code to support netlink in Linuxolator.linux_common(4) now depends on netlink(4).All netlink protocol constants are consistent with the Linux version.However, certain OS-specific constants such as AF_INET6, interfaceflags or default routing table id, are different between FreeBSD andLinux. Thus, it may be needed to rewrite some message parts or evenrewrite the whole message, adding or removing some TLVs. The corenetlink implementation code provides efficient rewriting callbacks which Linuxolator now uses.Reviewed by: dchaginDifferential Revision: https://reviews.freebsd.org/D36361MFC after: 2 months List of files: /freebsd/sys/modules/linux_common/Makefile Fri, 26 Aug 2022 16:34:15 +0200 Alexander V. Chernikov <melifaro@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#2b378d59a98a4eb1dab173c4db3b48f385c47728 linux(4); Move vdso_selector_x86.c to the linux_common moduleMFC after: 2 weeks List of files: /freebsd/sys/modules/linux_common/Makefile Mon, 23 May 2022 12:19:07 +0200 Dmitry Chagin <dchagin@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#2434137f690dabc35586ab45fc4c4ecc5b71184f linux(4): Deduplicate translate_traps()As translate_traps() is common for x86 Linuxulators,move it under x86/linux.MFC after: 2 weeks List of files: /freebsd/sys/modules/linux_common/Makefile Mon, 23 May 2022 12:16:26 +0200 Dmitry Chagin <dchagin@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#1f70a85b4cbc3ad19cec4a390e8754e54815be85 linux: add sysctl to pass untranslated interface namesReviewed by: kibMFC after: 2 weeksDifferential Revision: https://reviews.freebsd.org/D33792 List of files: /freebsd/sys/modules/linux_common/Makefile Sat, 08 Jan 2022 16:41:53 +0100 Alexander V. Chernikov <melifaro@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#5bb3134a8c21cb87b30e135ef168483f0333dabb Fix some modules to export more used symbolsand remove non-present symbols that are now reported by kmod_syms.awk.Reviewed by: emasteSponsored by: The FreeBSD FoundationMFC after: 1 weekDifferential revision: https://reviews.freebsd.org/D32878 List of files: /freebsd/sys/modules/linux_common/Makefile Sun, 07 Nov 2021 09:42:24 +0100 Konstantin Belousov <kib@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#e9b13c6612fea4e74f0c9c543e21d29d91a24dff linux(4): Deduplicate unimpl/dummy syscall handlersNo functional change.Reviewed by: emaste, traszDifferential Revision: https://reviews.freebsd.org/D27099 List of files: /freebsd/sys/modules/linux_common/Makefile Thu, 05 Nov 2020 20:30:31 +0100 Conrad Meyer <cem@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#7abf30d339336cef02a293352e0a82181e75c2fb Make linux_errtbl[] static.MFC after: 2 weeksSponsored by: The FreeBSD FoundationDifferential Revision: https://reviews.freebsd.org/D27004 List of files: /freebsd/sys/modules/linux_common/Makefile Tue, 03 Nov 2020 20:12:33 +0100 Edward Tomasz Napierala <trasz@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#0269ae4c19ad779b43b0d6e2416ac7386945d692 MFHead @348740Sponsored by: The FreeBSD Foundation List of files: /freebsd/sys/modules/linux_common/Makefile Thu, 06 Jun 2019 18:20:50 +0200 Alan Somers <asomers@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#6e4cf32e95841b4c3ef0caeb80802bf528a35cd0 Add warning to the Linuxulator makefiles that building it outside of akernel does not make sence.PR: 222861MFC after: 2 weeksDifferential Revision: https://reviews.freebsd.org/D20179 List of files: /freebsd/sys/modules/linux_common/Makefile Mon, 13 May 2019 20:28:40 +0200 Dmitry Chagin <dchagin@FreeBSD.org> http://kernelsources.org:8080/source/history/freebsd/sys/modules/linux_common/Makefile#c5156c7785c3f2c2ff7bcfa0a43f013c12e84037 Linuxulator depends on a fundamental kernel settings such as SMP. Manyof them listed in opt_global.h which is not generated while buildingmodules outside of a kernel and such modules never match real cofiguredkernel.So, we should prevent our users from building obviously defective modules.Therefore, remove the root cause of the building of modules outside of akernel - the possibility of building modules with DEBUG or KTR flags.And remove all of DEBUG printfs as it is incomplete and in threadedprogramms not informative, also a half of system call does not have DEBUGprintf. For debuging Linux programms we have dtrace, ktr and ktrace ability.PR: 222861Reviewed by: traszMFC after: 2 weeksDifferential Revision: https://reviews.freebsd.org/D20178 List of files: /freebsd/sys/modules/linux_common/Makefile Mon, 13 May 2019 20:24:29 +0200 Dmitry Chagin <dchagin@FreeBSD.org>