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31c41f1b1e
up the module_path string, we would walk one past the end of the buffer. This hurting ia64 originally, but it was probably also happening on i386 occasionally as well. The effects were usually harmless, it would add bogus "binary" search directories to the places it actually looked for files.
961 lines
23 KiB
C
961 lines
23 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* 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 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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* $FreeBSD$
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*/
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/*
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* file/module function dispatcher, support, etc.
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*/
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#include <stand.h>
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#include <string.h>
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#include <sys/param.h>
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#include <sys/linker.h>
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#include <sys/module.h>
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#include <sys/queue.h>
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#include "bootstrap.h"
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#define MDIR_REMOVED 0x0001
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#define MDIR_NOHINTS 0x0002
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struct moduledir {
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char *d_path; /* path of modules directory */
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u_char *d_hints; /* content of linker.hints file */
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int d_hintsz; /* size of hints data */
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int d_flags;
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STAILQ_ENTRY(moduledir) d_link;
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};
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static int file_load(char *filename, vm_offset_t dest, struct preloaded_file **result);
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static int file_loadraw(char *type, char *name);
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static int file_load_dependencies(struct preloaded_file *base_mod);
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static char * file_search(const char *name, char **extlist);
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static struct kernel_module * file_findmodule(struct preloaded_file *fp, char *modname, struct mod_depend *verinfo);
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static int file_havepath(const char *name);
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static char *mod_searchmodule(char *name, struct mod_depend *verinfo);
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static void file_insert_tail(struct preloaded_file *mp);
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struct file_metadata* metadata_next(struct file_metadata *base_mp, int type);
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static void moduledir_readhints(struct moduledir *mdp);
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static void moduledir_rebuild(void);
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/* load address should be tweaked by first module loaded (kernel) */
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static vm_offset_t loadaddr = 0;
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static const char *default_searchpath ="/boot/kernel;/boot/modules;/modules";
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static STAILQ_HEAD(, moduledir) moduledir_list = STAILQ_HEAD_INITIALIZER(moduledir_list);
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struct preloaded_file *preloaded_files = NULL;
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static char *kld_ext_list[] = {
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".ko",
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"",
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NULL
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};
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/*
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* load an object, either a disk file or code module.
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*
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* To load a file, the syntax is:
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*
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* load -t <type> <path>
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*
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* code modules are loaded as:
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*
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* load <path> <options>
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*/
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COMMAND_SET(load, "load", "load a kernel or module", command_load);
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static int
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command_load(int argc, char *argv[])
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{
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char *typestr;
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int dofile, dokld, ch, error;
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dokld = dofile = 0;
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optind = 1;
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optreset = 1;
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typestr = NULL;
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if (argc == 1) {
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command_errmsg = "no filename specified";
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return(CMD_ERROR);
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}
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while ((ch = getopt(argc, argv, "kt:")) != -1) {
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switch(ch) {
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case 'k':
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dokld = 1;
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break;
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case 't':
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typestr = optarg;
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dofile = 1;
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break;
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case '?':
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default:
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/* getopt has already reported an error */
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return(CMD_OK);
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}
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}
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argv += (optind - 1);
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argc -= (optind - 1);
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/*
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* Request to load a raw file?
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*/
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if (dofile) {
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if ((argc != 2) || (typestr == NULL) || (*typestr == 0)) {
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command_errmsg = "invalid load type";
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return(CMD_ERROR);
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}
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return(file_loadraw(typestr, argv[1]));
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}
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/*
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* Do we have explicit KLD load ?
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*/
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if (dokld || file_havepath(argv[1])) {
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error = mod_loadkld(argv[1], argc - 2, argv + 2);
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if (error == EEXIST)
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sprintf(command_errbuf, "warning: KLD '%s' already loaded", argv[1]);
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return (error == 0 ? CMD_OK : CMD_ERROR);
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}
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/*
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* Looks like a request for a module.
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*/
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error = mod_load(argv[1], NULL, argc - 2, argv + 2);
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if (error == EEXIST)
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sprintf(command_errbuf, "warning: module '%s' already loaded", argv[1]);
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return (error == 0 ? CMD_OK : CMD_ERROR);
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}
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COMMAND_SET(unload, "unload", "unload all modules", command_unload);
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static int
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command_unload(int argc, char *argv[])
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{
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struct preloaded_file *fp;
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while (preloaded_files != NULL) {
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fp = preloaded_files;
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preloaded_files = preloaded_files->f_next;
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file_discard(fp);
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}
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loadaddr = 0;
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unsetenv("kernelname");
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return(CMD_OK);
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}
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COMMAND_SET(lsmod, "lsmod", "list loaded modules", command_lsmod);
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static int
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command_lsmod(int argc, char *argv[])
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{
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struct preloaded_file *fp;
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struct kernel_module *mp;
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struct file_metadata *md;
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char lbuf[80];
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int ch, verbose;
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verbose = 0;
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optind = 1;
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optreset = 1;
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while ((ch = getopt(argc, argv, "v")) != -1) {
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switch(ch) {
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case 'v':
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verbose = 1;
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break;
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case '?':
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default:
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/* getopt has already reported an error */
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return(CMD_OK);
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}
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}
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pager_open();
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for (fp = preloaded_files; fp; fp = fp->f_next) {
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sprintf(lbuf, " %p: %s (%s, 0x%lx)\n",
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(void *) fp->f_addr, fp->f_name, fp->f_type, (long) fp->f_size);
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pager_output(lbuf);
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if (fp->f_args != NULL) {
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pager_output(" args: ");
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pager_output(fp->f_args);
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pager_output("\n");
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}
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if (fp->f_modules) {
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pager_output(" modules: ");
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for (mp = fp->f_modules; mp; mp = mp->m_next) {
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sprintf(lbuf, "%s.%d ", mp->m_name, mp->m_version);
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pager_output(lbuf);
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}
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pager_output("\n");
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}
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if (verbose) {
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/* XXX could add some formatting smarts here to display some better */
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for (md = fp->f_metadata; md != NULL; md = md->md_next) {
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sprintf(lbuf, " 0x%04x, 0x%lx\n", md->md_type, (long) md->md_size);
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pager_output(lbuf);
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}
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}
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}
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pager_close();
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return(CMD_OK);
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}
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/*
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* File level interface, functions file_*
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*/
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int
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file_load(char *filename, vm_offset_t dest, struct preloaded_file **result)
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{
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struct preloaded_file *fp;
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int error;
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int i;
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error = EFTYPE;
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for (i = 0, fp = NULL; file_formats[i] && fp == NULL; i++) {
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error = (file_formats[i]->l_load)(filename, loadaddr, &fp);
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if (error == 0) {
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fp->f_loader = i; /* remember the loader */
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*result = fp;
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break;
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}
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if (error == EFTYPE)
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continue; /* Unknown to this handler? */
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if (error) {
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sprintf(command_errbuf, "can't load file '%s': %s",
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filename, strerror(error));
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break;
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}
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}
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return (error);
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}
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static int
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file_load_dependencies(struct preloaded_file *base_file) {
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struct file_metadata *md;
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struct preloaded_file *fp;
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struct mod_depend *verinfo;
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struct kernel_module *mp;
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char *dmodname;
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int error;
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md = file_findmetadata(base_file, MODINFOMD_DEPLIST);
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if (md == NULL)
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return (0);
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error = 0;
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do {
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verinfo = (struct mod_depend*)md->md_data;
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dmodname = (char *)(verinfo + 1);
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if (file_findmodule(NULL, dmodname, verinfo) == NULL) {
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printf("loading required module '%s'\n", dmodname);
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error = mod_load(dmodname, verinfo, 0, NULL);
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if (error)
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break;
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/*
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* If module loaded via kld name which isn't listed
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* in the linker.hints file, we should check if it have
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* required version.
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*/
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mp = file_findmodule(NULL, dmodname, verinfo);
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if (mp == NULL) {
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sprintf(command_errbuf, "module '%s' exists but with wrong version",
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dmodname);
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error = ENOENT;
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break;
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}
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}
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md = metadata_next(md, MODINFOMD_DEPLIST);
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} while (md);
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if (!error)
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return (0);
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/* Load failed; discard everything */
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while (base_file != NULL) {
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fp = base_file;
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base_file = base_file->f_next;
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file_discard(fp);
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}
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return (error);
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}
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/*
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* We've been asked to load (name) as (type), so just suck it in,
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* no arguments or anything.
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*/
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int
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file_loadraw(char *type, char *name)
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{
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struct preloaded_file *fp;
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char *cp;
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int fd, got;
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vm_offset_t laddr;
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/* We can't load first */
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if ((file_findfile(NULL, NULL)) == NULL) {
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command_errmsg = "can't load file before kernel";
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return(CMD_ERROR);
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}
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/* locate the file on the load path */
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cp = file_search(name, NULL);
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if (cp == NULL) {
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sprintf(command_errbuf, "can't find '%s'", name);
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return(CMD_ERROR);
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}
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name = cp;
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if ((fd = open(name, O_RDONLY)) < 0) {
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sprintf(command_errbuf, "can't open '%s': %s", name, strerror(errno));
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free(name);
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return(CMD_ERROR);
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}
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laddr = loadaddr;
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for (;;) {
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/* read in 4k chunks; size is not really important */
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got = archsw.arch_readin(fd, laddr, 4096);
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if (got == 0) /* end of file */
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break;
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if (got < 0) { /* error */
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sprintf(command_errbuf, "error reading '%s': %s", name, strerror(errno));
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free(name);
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close(fd);
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return(CMD_ERROR);
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}
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laddr += got;
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}
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/* Looks OK so far; create & populate control structure */
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fp = file_alloc();
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fp->f_name = name;
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fp->f_type = strdup(type);
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fp->f_args = NULL;
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fp->f_metadata = NULL;
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fp->f_loader = -1;
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fp->f_addr = loadaddr;
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fp->f_size = laddr - loadaddr;
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/* recognise space consumption */
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loadaddr = laddr;
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/* Add to the list of loaded files */
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file_insert_tail(fp);
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close(fd);
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return(CMD_OK);
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}
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/*
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* Load the module (name), pass it (argc),(argv), add container file
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* to the list of loaded files.
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* If module is already loaded just assign new argc/argv.
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*/
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int
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mod_load(char *modname, struct mod_depend *verinfo, int argc, char *argv[])
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{
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struct kernel_module *mp;
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int err;
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char *filename;
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if (file_havepath(modname)) {
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printf("Warning: mod_load() called instead of mod_loadkld() for module '%s'\n", modname);
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return (mod_loadkld(modname, argc, argv));
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}
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/* see if module is already loaded */
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mp = file_findmodule(NULL, modname, verinfo);
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if (mp) {
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#ifdef moduleargs
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if (mp->m_args)
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free(mp->m_args);
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mp->m_args = unargv(argc, argv);
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#endif
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sprintf(command_errbuf, "warning: module '%s' already loaded", mp->m_name);
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return (0);
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}
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/* locate file with the module on the search path */
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filename = mod_searchmodule(modname, verinfo);
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if (filename == NULL) {
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sprintf(command_errbuf, "can't find '%s'", modname);
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return (ENOENT);
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}
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err = mod_loadkld(filename, argc, argv);
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return (err);
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}
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/*
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* Load specified KLD. If path is omitted, then try to locate it via
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* search path.
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*/
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int
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mod_loadkld(const char *kldname, int argc, char *argv[])
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{
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struct preloaded_file *fp, *last_file;
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int err;
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char *filename;
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/*
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* Get fully qualified KLD name
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*/
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filename = file_search(kldname, kld_ext_list);
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if (filename == NULL) {
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sprintf(command_errbuf, "can't find '%s'", kldname);
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return (ENOENT);
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}
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/*
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* Check if KLD already loaded
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*/
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fp = file_findfile(filename, NULL);
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if (fp) {
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sprintf(command_errbuf, "warning: KLD '%s' already loaded", filename);
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free(filename);
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return (0);
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}
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for (last_file = preloaded_files;
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last_file != NULL && last_file->f_next != NULL;
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last_file = last_file->f_next)
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;
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do {
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err = file_load(filename, loadaddr, &fp);
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if (err)
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break;
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fp->f_args = unargv(argc, argv);
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loadaddr = fp->f_addr + fp->f_size;
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file_insert_tail(fp); /* Add to the list of loaded files */
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if (file_load_dependencies(fp) != 0) {
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err = ENOENT;
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last_file->f_next = NULL;
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loadaddr = last_file->f_addr + last_file->f_size;
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fp = NULL;
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break;
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}
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} while(0);
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if (err == EFTYPE)
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sprintf(command_errbuf, "don't know how to load module '%s'", filename);
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if (err && fp)
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file_discard(fp);
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free(filename);
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return (err);
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}
|
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|
|
/*
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* Find a file matching (name) and (type).
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* NULL may be passed as a wildcard to either.
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*/
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struct preloaded_file *
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file_findfile(char *name, char *type)
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{
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struct preloaded_file *fp;
|
|
|
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for (fp = preloaded_files; fp != NULL; fp = fp->f_next) {
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if (((name == NULL) || !strcmp(name, fp->f_name)) &&
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((type == NULL) || !strcmp(type, fp->f_type)))
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break;
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}
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return (fp);
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}
|
|
|
|
/*
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* Find a module matching (name) inside of given file.
|
|
* NULL may be passed as a wildcard.
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|
*/
|
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struct kernel_module *
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file_findmodule(struct preloaded_file *fp, char *modname,
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struct mod_depend *verinfo)
|
|
{
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|
struct kernel_module *mp, *best;
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|
int bestver, mver;
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|
|
|
if (fp == NULL) {
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for (fp = preloaded_files; fp; fp = fp->f_next) {
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mp = file_findmodule(fp, modname, verinfo);
|
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if (mp)
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return (mp);
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|
}
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return (NULL);
|
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}
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best = NULL;
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bestver = 0;
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for (mp = fp->f_modules; mp; mp = mp->m_next) {
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if (strcmp(modname, mp->m_name) == 0) {
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|
if (verinfo == NULL)
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return (mp);
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mver = mp->m_version;
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if (mver == verinfo->md_ver_preferred)
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return (mp);
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|
if (mver >= verinfo->md_ver_minimum &&
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mver <= verinfo->md_ver_maximum &&
|
|
mver > bestver) {
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best = mp;
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bestver = mver;
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}
|
|
}
|
|
}
|
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return (best);
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}
|
|
/*
|
|
* Make a copy of (size) bytes of data from (p), and associate them as
|
|
* metadata of (type) to the module (mp).
|
|
*/
|
|
void
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file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p)
|
|
{
|
|
struct file_metadata *md;
|
|
|
|
md = malloc(sizeof(struct file_metadata) - sizeof(md->md_data) + size);
|
|
md->md_size = size;
|
|
md->md_type = type;
|
|
bcopy(p, md->md_data, size);
|
|
md->md_next = fp->f_metadata;
|
|
fp->f_metadata = md;
|
|
}
|
|
|
|
/*
|
|
* Find a metadata object of (type) associated with the file (fp)
|
|
*/
|
|
struct file_metadata *
|
|
file_findmetadata(struct preloaded_file *fp, int type)
|
|
{
|
|
struct file_metadata *md;
|
|
|
|
for (md = fp->f_metadata; md != NULL; md = md->md_next)
|
|
if (md->md_type == type)
|
|
break;
|
|
return(md);
|
|
}
|
|
|
|
struct file_metadata *
|
|
metadata_next(struct file_metadata *md, int type)
|
|
{
|
|
if (md == NULL)
|
|
return (NULL);
|
|
while((md = md->md_next) != NULL)
|
|
if (md->md_type == type)
|
|
break;
|
|
return (md);
|
|
}
|
|
|
|
static char *emptyextlist[] = { "", NULL };
|
|
|
|
/*
|
|
* Check if the given file is in place and return full path to it.
|
|
*/
|
|
static char *
|
|
file_lookup(const char *path, const char *name, int namelen, char **extlist)
|
|
{
|
|
struct stat st;
|
|
char *result, *cp, **cpp;
|
|
int pathlen, extlen, len;
|
|
|
|
pathlen = strlen(path);
|
|
extlen = 0;
|
|
if (extlist == NULL)
|
|
extlist = emptyextlist;
|
|
for (cpp = extlist; *cpp; cpp++) {
|
|
len = strlen(*cpp);
|
|
if (len > extlen)
|
|
extlen = len;
|
|
}
|
|
result = malloc(pathlen + namelen + extlen + 2);
|
|
if (result == NULL)
|
|
return (NULL);
|
|
bcopy(path, result, pathlen);
|
|
if (pathlen > 0 && result[pathlen - 1] != '/')
|
|
result[pathlen++] = '/';
|
|
cp = result + pathlen;
|
|
bcopy(name, cp, namelen);
|
|
cp += namelen;
|
|
for (cpp = extlist; *cpp; cpp++) {
|
|
strcpy(cp, *cpp);
|
|
if (stat(result, &st) == 0 && S_ISREG(st.st_mode))
|
|
return result;
|
|
}
|
|
free(result);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Check if file name have any qualifiers
|
|
*/
|
|
static int
|
|
file_havepath(const char *name)
|
|
{
|
|
const char *cp;
|
|
|
|
archsw.arch_getdev(NULL, name, &cp);
|
|
return (cp != name || strchr(name, '/') != NULL);
|
|
}
|
|
|
|
/*
|
|
* Attempt to find the file (name) on the module searchpath.
|
|
* If (name) is qualified in any way, we simply check it and
|
|
* return it or NULL. If it is not qualified, then we attempt
|
|
* to construct a path using entries in the environment variable
|
|
* module_path.
|
|
*
|
|
* The path we return a pointer to need never be freed, as we manage
|
|
* it internally.
|
|
*/
|
|
static char *
|
|
file_search(const char *name, char **extlist)
|
|
{
|
|
struct moduledir *mdp;
|
|
struct stat sb;
|
|
char *result;
|
|
int namelen;
|
|
|
|
/* Don't look for nothing */
|
|
if (name == NULL)
|
|
return(NULL);
|
|
|
|
if (*name == 0)
|
|
return(strdup(name));
|
|
|
|
if (file_havepath(name)) {
|
|
/* Qualified, so just see if it exists */
|
|
if (stat(name, &sb) == 0)
|
|
return(strdup(name));
|
|
return(NULL);
|
|
}
|
|
moduledir_rebuild();
|
|
result = NULL;
|
|
namelen = strlen(name);
|
|
STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
|
|
result = file_lookup(mdp->d_path, name, namelen, extlist);
|
|
if (result)
|
|
break;
|
|
}
|
|
return(result);
|
|
}
|
|
|
|
#define INT_ALIGN(base, ptr) ptr = \
|
|
(base) + (((ptr) - (base) + sizeof(int) - 1) & ~(sizeof(int) - 1))
|
|
|
|
static char *
|
|
mod_search_hints(struct moduledir *mdp, const char *modname,
|
|
struct mod_depend *verinfo)
|
|
{
|
|
u_char *cp, *recptr, *bufend, *best;
|
|
char *result;
|
|
int *intp, bestver, blen, clen, found, ival, modnamelen, reclen;
|
|
|
|
moduledir_readhints(mdp);
|
|
modnamelen = strlen(modname);
|
|
found = 0;
|
|
result = NULL;
|
|
bestver = 0;
|
|
if (mdp->d_hints == NULL)
|
|
goto bad;
|
|
recptr = mdp->d_hints;
|
|
bufend = recptr + mdp->d_hintsz;
|
|
clen = blen = 0;
|
|
best = cp = NULL;
|
|
while (recptr < bufend && !found) {
|
|
intp = (int*)recptr;
|
|
reclen = *intp++;
|
|
ival = *intp++;
|
|
cp = (char*)intp;
|
|
switch (ival) {
|
|
case MDT_VERSION:
|
|
clen = *cp++;
|
|
if (clen != modnamelen || bcmp(cp, modname, clen) != 0)
|
|
break;
|
|
cp += clen;
|
|
INT_ALIGN(mdp->d_hints, cp);
|
|
ival = *(int*)cp;
|
|
cp += sizeof(int);
|
|
clen = *cp++;
|
|
if (verinfo == NULL || ival == verinfo->md_ver_preferred) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
if (ival >= verinfo->md_ver_minimum &&
|
|
ival <= verinfo->md_ver_maximum &&
|
|
ival > bestver) {
|
|
bestver = ival;
|
|
best = cp;
|
|
blen = clen;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
recptr += reclen + sizeof(int);
|
|
}
|
|
/*
|
|
* Finally check if KLD is in the place
|
|
*/
|
|
if (found)
|
|
result = file_lookup(mdp->d_path, cp, clen, NULL);
|
|
else if (best)
|
|
result = file_lookup(mdp->d_path, best, blen, NULL);
|
|
bad:
|
|
/*
|
|
* If nothing found or hints is absent - fallback to the old way
|
|
* by using "kldname[.ko]" as module name.
|
|
*/
|
|
if (!found && !bestver && result == NULL)
|
|
result = file_lookup(mdp->d_path, modname, modnamelen, kld_ext_list);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Attempt to locate the file containing the module (name)
|
|
*/
|
|
static char *
|
|
mod_searchmodule(char *name, struct mod_depend *verinfo)
|
|
{
|
|
struct moduledir *mdp;
|
|
char *result;
|
|
|
|
moduledir_rebuild();
|
|
/*
|
|
* Now we ready to lookup module in the given directories
|
|
*/
|
|
result = NULL;
|
|
STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
|
|
result = mod_search_hints(mdp, name, verinfo);
|
|
if (result)
|
|
break;
|
|
}
|
|
|
|
return(result);
|
|
}
|
|
|
|
int
|
|
file_addmodule(struct preloaded_file *fp, char *modname, int version,
|
|
struct kernel_module **newmp)
|
|
{
|
|
struct kernel_module *mp;
|
|
struct mod_depend mdepend;
|
|
|
|
bzero(&mdepend, sizeof(mdepend));
|
|
mdepend.md_ver_preferred = version;
|
|
mp = file_findmodule(fp, modname, &mdepend);
|
|
if (mp)
|
|
return (EEXIST);
|
|
mp = malloc(sizeof(struct kernel_module));
|
|
if (mp == NULL)
|
|
return (ENOMEM);
|
|
bzero(mp, sizeof(struct kernel_module));
|
|
mp->m_name = strdup(modname);
|
|
mp->m_version = version;
|
|
mp->m_fp = fp;
|
|
mp->m_next = fp->f_modules;
|
|
fp->f_modules = mp;
|
|
if (newmp)
|
|
*newmp = mp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Throw a file away
|
|
*/
|
|
void
|
|
file_discard(struct preloaded_file *fp)
|
|
{
|
|
struct file_metadata *md, *md1;
|
|
struct kernel_module *mp, *mp1;
|
|
if (fp == NULL)
|
|
return;
|
|
md = fp->f_metadata;
|
|
while (md) {
|
|
md1 = md;
|
|
md = md->md_next;
|
|
free(md1);
|
|
}
|
|
mp = fp->f_modules;
|
|
while (mp) {
|
|
if (mp->m_name)
|
|
free(mp->m_name);
|
|
mp1 = mp;
|
|
mp = mp->m_next;
|
|
free(mp1);
|
|
}
|
|
if (fp->f_name != NULL)
|
|
free(fp->f_name);
|
|
if (fp->f_type != NULL)
|
|
free(fp->f_type);
|
|
if (fp->f_args != NULL)
|
|
free(fp->f_args);
|
|
free(fp);
|
|
}
|
|
|
|
/*
|
|
* Allocate a new file; must be used instead of malloc()
|
|
* to ensure safe initialisation.
|
|
*/
|
|
struct preloaded_file *
|
|
file_alloc(void)
|
|
{
|
|
struct preloaded_file *fp;
|
|
|
|
if ((fp = malloc(sizeof(struct preloaded_file))) != NULL) {
|
|
bzero(fp, sizeof(struct preloaded_file));
|
|
}
|
|
return (fp);
|
|
}
|
|
|
|
/*
|
|
* Add a module to the chain
|
|
*/
|
|
static void
|
|
file_insert_tail(struct preloaded_file *fp)
|
|
{
|
|
struct preloaded_file *cm;
|
|
|
|
/* Append to list of loaded file */
|
|
fp->f_next = NULL;
|
|
if (preloaded_files == NULL) {
|
|
preloaded_files = fp;
|
|
} else {
|
|
for (cm = preloaded_files; cm->f_next != NULL; cm = cm->f_next)
|
|
;
|
|
cm->f_next = fp;
|
|
}
|
|
}
|
|
|
|
static char *
|
|
moduledir_fullpath(struct moduledir *mdp, const char *fname)
|
|
{
|
|
char *cp;
|
|
|
|
cp = malloc(strlen(mdp->d_path) + strlen(fname) + 2);
|
|
if (cp == NULL)
|
|
return NULL;
|
|
strcpy(cp, mdp->d_path);
|
|
strcat(cp, "/");
|
|
strcat(cp, fname);
|
|
return (cp);
|
|
}
|
|
|
|
/*
|
|
* Read linker.hints file into memory performing some sanity checks.
|
|
*/
|
|
static void
|
|
moduledir_readhints(struct moduledir *mdp)
|
|
{
|
|
struct stat st;
|
|
char *path;
|
|
int fd, size, version;
|
|
|
|
if (mdp->d_hints != NULL || (mdp->d_flags & MDIR_NOHINTS))
|
|
return;
|
|
path = moduledir_fullpath(mdp, "linker.hints");
|
|
if (stat(path, &st) != 0 || st.st_size < (sizeof(version) + sizeof(int)) ||
|
|
st.st_size > 100 * 1024 || (fd = open(path, O_RDONLY)) < 0) {
|
|
free(path);
|
|
mdp->d_flags |= MDIR_NOHINTS;
|
|
return;
|
|
}
|
|
free(path);
|
|
size = read(fd, &version, sizeof(version));
|
|
if (size != sizeof(version) || version != LINKER_HINTS_VERSION)
|
|
goto bad;
|
|
size = st.st_size - size;
|
|
mdp->d_hints = malloc(size);
|
|
if (mdp->d_hints == NULL)
|
|
goto bad;
|
|
if (read(fd, mdp->d_hints, size) != size)
|
|
goto bad;
|
|
mdp->d_hintsz = size;
|
|
close(fd);
|
|
return;
|
|
bad:
|
|
close(fd);
|
|
if (mdp->d_hints) {
|
|
free(mdp->d_hints);
|
|
mdp->d_hints = NULL;
|
|
}
|
|
mdp->d_flags |= MDIR_NOHINTS;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Extract directories from the ';' separated list, remove duplicates.
|
|
*/
|
|
static void
|
|
moduledir_rebuild(void)
|
|
{
|
|
struct moduledir *mdp, *mtmp;
|
|
const char *path, *cp, *ep;
|
|
int cplen;
|
|
|
|
path = getenv("module_path");
|
|
if (path == NULL)
|
|
path = default_searchpath;
|
|
/*
|
|
* Rebuild list of module directories if it changed
|
|
*/
|
|
STAILQ_FOREACH(mdp, &moduledir_list, d_link)
|
|
mdp->d_flags |= MDIR_REMOVED;
|
|
|
|
for (ep = path; *ep != 0; ep++) {
|
|
cp = ep;
|
|
for (; *ep != 0 && *ep != ';'; ep++)
|
|
;
|
|
/*
|
|
* Ignore trailing slashes
|
|
*/
|
|
for (cplen = ep - cp; cplen > 1 && cp[cplen - 1] == '/'; cplen--)
|
|
;
|
|
STAILQ_FOREACH(mdp, &moduledir_list, d_link) {
|
|
if (strlen(mdp->d_path) != cplen || bcmp(cp, mdp->d_path, cplen) != 0)
|
|
continue;
|
|
mdp->d_flags &= ~MDIR_REMOVED;
|
|
break;
|
|
}
|
|
if (mdp == NULL) {
|
|
mdp = malloc(sizeof(*mdp) + cplen + 1);
|
|
if (mdp == NULL)
|
|
return;
|
|
mdp->d_path = (char*)(mdp + 1);
|
|
bcopy(cp, mdp->d_path, cplen);
|
|
mdp->d_path[cplen] = 0;
|
|
mdp->d_hints = NULL;
|
|
mdp->d_flags = 0;
|
|
STAILQ_INSERT_TAIL(&moduledir_list, mdp, d_link);
|
|
}
|
|
if (*ep == 0)
|
|
break;
|
|
}
|
|
/*
|
|
* Delete unused directories if any
|
|
*/
|
|
mdp = STAILQ_FIRST(&moduledir_list);
|
|
while (mdp) {
|
|
if ((mdp->d_flags & MDIR_REMOVED) == 0) {
|
|
mdp = STAILQ_NEXT(mdp, d_link);
|
|
} else {
|
|
if (mdp->d_hints)
|
|
free(mdp->d_hints);
|
|
mtmp = mdp;
|
|
mdp = STAILQ_NEXT(mdp, d_link);
|
|
STAILQ_REMOVE(&moduledir_list, mtmp, moduledir, d_link);
|
|
free(mtmp);
|
|
}
|
|
}
|
|
return;
|
|
}
|