111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
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/* $NetBSD: rumpuser_dl.c,v 1.1 2009/09/24 21:30:42 pooka Exp $ */
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/*
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* Copyright (c) 2009 Antti Kantee. All Rights Reserved.
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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 ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* 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 OR
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* 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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/*
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* Load all module link sets. Called during rump bootstrap.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: rumpuser_dl.c,v 1.1 2009/09/24 21:30:42 pooka Exp $");
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#include <sys/types.h>
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#include <sys/time.h>
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#include <assert.h>
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#include <dlfcn.h>
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#include <link_elf.h>
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#include <stdio.h>
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#include <string.h>
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#include <rump/rump.h>
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#include <rump/rumpuser.h>
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#if defined(__NetBSD__) || defined(__FreeBSD__) \
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|| (defined(__sun__) && defined(__svr4__))
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static void
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process(const char *soname)
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{
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void *handle;
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struct modinfo **mi, **mi_end;
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if (strstr(soname, "librump") == NULL)
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return;
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handle = dlopen(soname, RTLD_LAZY);
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if (handle == NULL)
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return;
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mi = dlsym(handle, "__start_link_set_modules");
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if (!mi)
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return;
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mi_end = dlsym(handle, "__stop_link_set_modules");
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if (!mi_end)
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return;
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for (; mi < mi_end; mi++)
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rump_module_init(*mi, NULL);
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assert(mi == mi_end);
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dlclose(handle);
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}
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/*
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* Get the linkmap from the dynlinker. Try to load kernel modules
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* from all objects in the linkmap.
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*/
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void
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rumpuser_dl_module_bootstrap(void)
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{
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struct link_map *map;
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if (dlinfo(RTLD_SELF, RTLD_DI_LINKMAP, &map) == -1) {
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fprintf(stderr, "warning: rumpuser module bootstrap "
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"failed: %s\n", dlerror());
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return;
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}
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/*
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* Load starting from last object because of
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* possible dependencies.
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* XXX: not perfect. this could retry the list until no (or all)
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* modules were be loaded?
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*/
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for (; map->l_next; map = map->l_next)
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continue;
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for (; map; map = map->l_prev)
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process(map->l_name);
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}
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#else
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void
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rumpuser_dl_module_bootstrap(void)
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{
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fprintf(stderr, "Warning, dlinfo() unsupported on host?\n");
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fprintf(stderr, "module bootstrap unavailable\n");
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}
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#endif
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