src/sys/modules/ksyms, branch stable/13

sys: Remove $FreeBSD$: one-line sh pattern

2023-08-23T17:43:27+00:00

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Similar commit in current:
(cherry picked from commit 031beb4e239b)

sys/modules: normalize .CURDIR-relative paths to SRCTOP

2017-03-04T10:10:17+00:00

This simplifies make output/logic

Tested with:	`cd sys/modules; make ALL_MODULES=` on amd64
MFC after:	1 month
Sponsored by:	Dell EMC Isilon

Kill MFILES and find things automatically. It turned out to be only

2015-07-03T01:50:26+00:00

lightly used. Find the proper .m file when we depend on *_if.[ch] in
the srcs line, with seat-belts for false positive matches.  This uses
make's path mechanism. A further refinement would be to calculate this
once, and then pass the resulting _MPATH to modules submakes.

Differential Revision: https://reviews.freebsd.org/D2327

Add the ksyms(4) pseudo driver. The ksyms driver allows a process to

2009-05-26T21:39:09+00:00

get a quick snapshot of the kernel's symbol table including the symbols
from any loaded modules (the symbols are all merged into one symbol
table).  Unlike like other implementations, this ksyms driver maps
memory in the process memory space to store the snapshot at the time
/dev/ksyms is opened.  It also checks to see if the process has already
a snapshot open and won't allow it to open /dev/ksyms it again until it
closes first.  This prevents kernel and process memory from being
exhausted.  Note that /dev/ksyms is used by the lockstat(1) command.

Reviewed by:	gallatin kib (freebsd-arch)
Approved by:	gnn (mentor)