src/sys/amd64/linux, branch releng/12.2

amd64/linux*: add required header to get the constant value

2021-05-26T19:38:41Z

Otherwise asm silently interpret it as the external global symbol. Approved by: so Security: FreeBSD-SA-21:11.smap Security: CVE-2021-29628 Reported by: bz Sponsored by: The FreeBSD Foundation Fixes: 91aae953cb80 (cherry picked from commit a59f0285377aa3d61cccda64e9ade126ecb3d2d9) (cherry picked from commit b25bb77861640456a77fbf6f34cac4a3b69f0e5f)

amd64: clear PSL.AC in the right frame

2021-05-26T19:38:13Z

If copyin family of routines fault, kernel does clear PSL.AC on the fault entry, but the AC flag of the faulted frame is kept intact. Since onfault handler is effectively jump, AC survives until syscall exit. Approved by: so Security: FreeBSD-SA-21:11.smap Security: CVE-2021-29628 Reported by: m00nbsd, via Sony Reviewed by: markj Sponsored by: The FreeBSD Foundation admbugs: 975 (cherry picked from commit 91aae953cb807d6fb7a70782b323bf9beb60d7c9) (cherry picked from commit 4590f0345956329d414611c6cee300f486732b53)

Fix execve/fexecve system call auditing.

2020-12-01T19:34:45Z

Approved by: so Security: FreeBSD-EN-20:19.audit

MFC r363305:

2020-09-01T12:11:59Z

Regen after r363304. Sponsored by: The FreeBSD Foundation

MFC r363304:

2020-09-01T12:09:13Z

Add a trivial linux(4) splice(2) implementation, which simply returns EINVAL. Fixes grep (grep-3.1-2build1). PR: 218699 Sponsored by: The FreeBSD Foundation

MFC r362441:

2020-08-24T17:29:37Z

Regen after r362440. Sponsored by: The FreeBSD Foundation

MFC r362440:

2020-08-24T17:25:26Z

Add linux_madvise(2) instead of having Linux apps call the native FreeBSD madvise(2) directly. While some of the flag values match, most don't. PR: kern/230160 Sponsored by: The FreeBSD Foundation

MFC r347538 by dchagin:

2020-08-24T17:06:34Z

Linuxulator depends on a fundamental kernel settings such as SMP. Many of them listed in opt_global.h which is not generated while building modules outside of a kernel and such modules never match real cofigured kernel. So, we should prevent our users from building obviously defective modules. Therefore, remove the root cause of the building of modules outside of a kernel - the possibility of building modules with DEBUG or KTR flags. And remove all of DEBUG printfs as it is incomplete and in threaded programms not informative, also a half of system call does not have DEBUG printf. For debuging Linux programms we have dtrace, ktr and ktrace ability. PR: 222861

MFC r353725 by yuripv:

2020-08-23T21:48:57Z

linux: futex_mtx should follow futex_list Move futex_mtx to linux_common.ko for amd64 and aarch64 along with respective list/mutex init/destroy. PR: 240989 Reported by: Alex S

MFC r350451 by emaste:

2020-08-23T21:38:48Z

linuxulator: rename linux_locore.s to .asm It is assembled using "${CC} -x assembler-with-cpp", which by convention (bsd.suffixes.mk) uses the .asm extension. This is a portion of the review referenced below (D18344). That review also renamed linux_support.s to .S, but that is a functional change (using the compiler's integrated assembler instead of as) and will be revisited separately. Sponsored by: The FreeBSD Foundation