962 lines
23 KiB
C
962 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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";
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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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|
|
|
/*
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* Find a module matching (name) inside of given file.
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* 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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{
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struct kernel_module *mp, *best;
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int bestver, mver;
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|
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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 &&
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mver > bestver) {
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best = mp;
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bestver = mver;
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}
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}
|
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}
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return (best);
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}
|
|
/*
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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;
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|
md->md_type = type;
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|
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;
|
|
}
|