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Date:      Wed, 04 Nov 2020 21:49:44 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 250828] kern.module_path does not include /boot/modules
Message-ID:  <bug-250828-227-2hDJ6EnIuc@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-250828-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-250828-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D250828

Ed Maste <emaste@freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |emaste@freebsd.org

--- Comment #1 from Ed Maste <emaste@freebsd.org> ---
default linker path in the kernel is (from sys/kern/kern_linker.c):

static char linker_hintfile[] =3D "linker.hints";
static char linker_path[MAXPATHLEN] =3D "/boot/kernel;/boot/modules";

SYSCTL_STRING(_kern, OID_AUTO, module_path, CTLFLAG_RWTUN, linker_path,
    sizeof(linker_path), "module load search path");

TUNABLE_STR("module_path", linker_path, sizeof(linker_path));

static const char * const linker_ext_list[] =3D {
        "",
        ".ko",
        NULL
};

Typically the actual module path will be determined by the loader and passe=
d as
module_path.

>From stand/defaults/loader.conf:
module_path=3D"/boot/modules;/boot/dtb;/boot/dtb/overlays"    # Set the mod=
ule
search path

and logic in
stand/lua/config.lua
or
stand/forth/support.4th

On my -CURRENT laptop:

$ sysctl kern.module_path
kern.module_path: /boot/20201009;/boot/modules;/boot/dtb;/boot/dtb/overlays

--=20
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