src/sys/amd64/linux/linux_support.s, branch release/13.2.0

linux(4): Return native error from futex_atomic_op to avoid conversion by the caller.

2022-06-17T19:35:06Z

MFC after: 2 weeks (cherry picked from commit 07d108932ab5b5bc25221be4916ebf8874cd256f)

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

2021-05-26T19:18:54Z

Otherwise asm silently interpret it as the external global symbol. Reported by: bz Sponsored by: The FreeBSD Foundation Fixes: 91aae953cb80 (cherry picked from commit a59f0285377aa3d61cccda64e9ade126ecb3d2d9)

amd64: clear PSL.AC in the right frame

2021-05-26T19:18:41Z

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. Reported by: m00nbsd, via Sony Reviewed by: markj Sponsored by: The FreeBSD Foundation admbugs: 975 (cherry picked from commit 91aae953cb807d6fb7a70782b323bf9beb60d7c9)

linux: Fix SMAP-enabled futex routines

2021-05-23T16:43:43Z

Some of them were dereferencing the user pointer before disabling SMAP. PR: 255591 Reviewed by: kib Tested by: pitwuu@gmail.com Sponsored by: The FreeBSD Foundation (cherry picked from commit fb580451456aa769daa2f4b2f077e39692f80c62)

Futex support functions in linux.ko and linux32.ko on amd64 should be

2018-08-07T18:29:10Z

aware of SMAP. Reported and tested by: Johannes Lundberg , wulf Sponsored by: The FreeBSD Foundation

Add END()s for amd64 linux futex support routines.

2018-08-04T13:57:50Z

Sponsored by: The FreeBSD Foundation MFC after: 1 week

Rename assym.s to assym.inc

2018-03-20T17:58:51Z

assym is only to be included by other .s files, and should never actually be assembled by itself. Reviewed by: imp, bdrewery (earlier) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D14180

Use BSD-2-Clause-FreeBSD license on linux_support.s

2018-01-23T20:35:43Z

These files previously had a 3-clause license and 'THE REGENTS' text. Switch to standard 2-clause text with kib's approval, and add the SPDX tag. Approved by: kib

Renumber copyright clause 4

2017-02-28T23:42:47Z

Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann Pull Request: https://github.com/freebsd/freebsd/pull/96

Futex is an aligned 32-bit integer. Use the proper instruction and

2015-06-08T17:39:25Z

operand when dereferencing futex pointer.