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/*-
* Copyright (c) 2004-2008 University of Zagreb
* Copyright (c) 2006-2008 FreeBSD Foundation
*
* This software was developed by the University of Zagreb and the
* FreeBSD Foundation under sponsorship by the Stichting NLnet and the
* FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/linker.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/vimage.h>
#ifndef VIMAGE_GLOBALS
MALLOC_DEFINE(M_VIMAGE, "vimage", "vimage resource container");
static TAILQ_HEAD(vnet_modlink_head, vnet_modlink) vnet_modlink_head;
void
vnet_mod_register(const struct vnet_modinfo *vmi)
{
struct vnet_modlink *vml, *vml_iter;
/* Do not register the same module instance more than once. */
TAILQ_FOREACH(vml_iter, &vnet_modlink_head, vml_mod_le)
if (vml_iter->vml_modinfo == vmi)
panic("%s: %s", __func__, vmi->vmi_name);
vml = malloc(sizeof(struct vnet_modlink), M_VIMAGE, M_NOWAIT);
vml->vml_modinfo = vmi;
TAILQ_INSERT_TAIL(&vnet_modlink_head, vml, vml_mod_le);
}
/*
* vi_symlookup() attempts to resolve name to address queries for
* variables which have been moved from global namespace to virtualization
* container structures, but are still directly accessed from legacy
* userspace processes via kldsym(2) and kmem(4) interfaces.
*/
int
vi_symlookup(struct kld_sym_lookup *lookup, char *symstr)
{
struct vnet_modlink *vml;
struct vnet_symmap *mapentry;
TAILQ_FOREACH(vml, &vnet_modlink_head, vml_mod_le) {
if (vml->vml_modinfo->vmi_symmap == NULL)
continue;
for (mapentry = vml->vml_modinfo->vmi_symmap;
mapentry->name != NULL; mapentry++) {
if (strcmp(symstr, mapentry->name) == 0) {
lookup->symvalue = (u_long) mapentry->base;
lookup->symsize = mapentry->size;
return (0);
}
}
}
return (ENOENT);
}
static void
vi_init(void *unused)
{
TAILQ_INIT(&vnet_modlink_head);
}
SYSINIT(vimage, SI_SUB_VIMAGE, SI_ORDER_FIRST, vi_init, NULL);
#endif /* !VIMAGE_GLOBALS */
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