sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Merge ^/head r325999 through r326131.

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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Merge ^/head r307383 through r307735.

Implement BPF_MOD and BPF_XOR instructions.

These two ALU instructions first appeared on Linux. Then, libpcap adopted
and made them available since 1.6.2. Now more platforms including NetBSD
have

Implement BPF_MOD and BPF_XOR instructions.

These two ALU instructions first appeared on Linux. Then, libpcap adopted
and made them available since 1.6.2. Now more platforms including NetBSD
have them in kernel. So do we.
--이 줄 이하는 자동으로 제거됩니다--

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Merge svn+ssh://svn.freebsd.org/base/head@207793

Update to current version of head.

If a conditional jump instruction has the same jt and jf, do not perform
the test and jump unconditionally.

IFH@204581

Merge from head at r201628.

# This hasn't been tested, and there are at least three bad commits
# that need to be backed out before the branch will be stable again.

- Add more aggressive BPF JIT optimization. This is in more favor of i386
while the previous commit was more amd64-centric.
- Use calloc(3) instead of malloc(3)/memset(3) in user land[1].

Submitted

- Add more aggressive BPF JIT optimization. This is in more favor of i386
while the previous commit was more amd64-centric.
- Use calloc(3) instead of malloc(3)/memset(3) in user land[1].

Submitted by: ed[1]

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Add an experimental and rudimentary JIT optimizer to reduce unncessary
overhead from short BPF filter programs such as "get the first 96 bytes".

- Allocate scratch memory on stack instead of pre-allocating it with
the filter as we do from bpf_filter()[1].
- Revert experimental use of contigmalloc(9)/contigfree(9). It has no
performance benef

- Allocate scratch memory on stack instead of pre-allocating it with
the filter as we do from bpf_filter()[1].
- Revert experimental use of contigmalloc(9)/contigfree(9). It has no
performance benefit over malloc(9)/free(9)[2].

Requested by: rwatson[1]
Pointed out by: rwatson, jhb, alc[2]

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- Make BPF JIT compiler working again in userland. We are limiting size of
generated native binary to page size for now.
- Update copyright date and fix some style nits.

Fix a typo in copyrights.

Correctly check unsignedness of all BPF_LD|BPF_IND instructions.
This is roughly from sys/net/bpf_filter.c r1.12 and r1.14.

- Remove unnecessary jump instruction(s) when offset(s) is/are zero(s).
- Constantly use conditional jumps for unsigned integers.

Update copyrights and fix style(9).

Replace all stack usages with registers and remove unused macros.

Emit opcodes closer to GNU as(1) generated codes and micro-optimize.

Rehash and clean up BPF JIT compiler macros to match AT&T notations.

Fix ZERO_EDX() macro from the previous commit. It was emitting
`xor %ecx, %ecx', not `xor %edx, %edx'.

- Micro-optimize `mov $0, %edx' -> `xor %edx, %edx'.
- Correct amd64 macro style (no functional change).

Add experimental BPF Just-In-Time compiler for amd64 and i386.

Use the following kernel configuration option to enable:

options BPF_JITTER

If you want to use bpf_filter() instead (e. g., debuggin

Add experimental BPF Just-In-Time compiler for amd64 and i386.

Use the following kernel configuration option to enable:

options BPF_JITTER

If you want to use bpf_filter() instead (e. g., debugging), do:

sysctl net.bpf.jitter.enable=0

to turn it off.

Currently BIOCSETWF and bpf_mtap2() are unsupported, and bpf_mtap() is
partially supported because 1) no need, 2) avoid expensive m_copydata(9).

Obtained from: WinPcap 3.1 (for i386)

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Merge from head at r201628.

# This hasn't been tested, and there are at least three bad commits
# that need to be backed out before the branch will be stable again.