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