990 lines
29 KiB
C
990 lines
29 KiB
C
/*
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* Copyright 1995-1998 by Metro Link, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Metro Link, Inc. not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Metro Link, Inc. makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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* METRO LINK, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL METRO LINK, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Copyright (c) 1997-2002 by The XFree86 Project, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the copyright holder(s)
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* and author(s) shall not be used in advertising or otherwise to promote
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* the sale, use or other dealings in this Software without prior written
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* authorization from the copyright holder(s) and author(s).
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "dix.h"
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#include "os.h"
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#include "loaderProcs.h"
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#include "xf86Module.h"
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#include "loader.h"
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#include "xf86Module_priv.h"
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <regex.h>
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#include <dirent.h>
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#include <limits.h>
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typedef struct _pattern {
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const char *pattern;
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regex_t rex;
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} PatternRec, *PatternPtr;
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/* Prototypes for static functions */
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static char *FindModule(const char *, const char *, PatternPtr);
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static Bool CheckVersion(const char *, XF86ModuleVersionInfo *,
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const XF86ModReqInfo *);
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static char *LoaderGetCanonicalName(const char *, PatternPtr);
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static void RemoveChild(ModuleDescPtr);
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const ModuleVersions LoaderVersionInfo = {
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XORG_VERSION_CURRENT,
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ABI_ANSIC_VERSION,
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ABI_VIDEODRV_VERSION,
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ABI_XINPUT_VERSION,
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ABI_EXTENSION_VERSION,
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};
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static int ModuleDuplicated[] = { };
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static void
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FreeStringList(char **paths)
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{
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char **p;
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if (!paths)
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return;
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for (p = paths; *p; p++)
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free(*p);
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free(paths);
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}
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static char **defaultPathList = NULL;
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static Bool
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PathIsAbsolute(const char *path)
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{
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return *path == '/';
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}
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/*
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* Convert a comma-separated path into a NULL-terminated array of path
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* elements, rejecting any that are not full absolute paths, and appending
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* a '/' when it isn't already present.
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*/
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static char **
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InitPathList(const char *path)
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{
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char *fullpath = NULL;
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char *elem = NULL;
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char **list = NULL, **save = NULL;
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int len;
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int addslash;
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int n = 0;
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fullpath = strdup(path);
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if (!fullpath)
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return NULL;
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elem = strtok(fullpath, ",");
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while (elem) {
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if (PathIsAbsolute(elem)) {
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len = strlen(elem);
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addslash = (elem[len - 1] != '/');
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if (addslash)
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len++;
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save = list;
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list = reallocarray(list, n + 2, sizeof(char *));
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if (!list) {
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if (save) {
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save[n] = NULL;
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FreeStringList(save);
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}
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free(fullpath);
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return NULL;
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}
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list[n] = calloc(1, len + 1);
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if (!list[n]) {
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FreeStringList(list);
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free(fullpath);
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return NULL;
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}
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strcpy(list[n], elem);
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if (addslash) {
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list[n][len - 1] = '/';
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list[n][len] = '\0';
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}
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n++;
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}
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elem = strtok(NULL, ",");
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}
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if (list)
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list[n] = NULL;
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free(fullpath);
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return list;
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}
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void
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LoaderSetPath(const char *path)
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{
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if (!path)
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return;
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FreeStringList(defaultPathList);
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defaultPathList = InitPathList(path);
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}
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/* Standard set of module subdirectories to search, in order of preference */
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static const char *stdSubdirs[] = {
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// first try loading from per-ABI subdir
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XORG_MODULE_ABI_TAG "/",
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XORG_MODULE_ABI_TAG "/input/",
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XORG_MODULE_ABI_TAG "/drivers/",
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XORG_MODULE_ABI_TAG "/extensions/",
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// now try loading from legacy / unversioned directories
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"",
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"input/",
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"drivers/",
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"extensions/",
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NULL
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};
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/*
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* Standard set of module name patterns to check, in order of preference
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* These are regular expressions (suitable for use with POSIX regex(3)).
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*
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* This list assumes that you're an ELFish platform and therefore your
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* shared libraries are named something.so. If we're ever nuts enough
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* to port this DDX to, say, Darwin, we'll need to fix this.
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*/
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static PatternRec stdPatterns[] = {
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{"^lib(.*)\\.so$",},
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{"(.*)_drv\\.so$",},
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{"(.*)\\.so$",},
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{NULL,}
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};
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static PatternPtr
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InitPatterns(const char **patternlist)
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{
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char errmsg[80];
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int i, e;
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PatternPtr patterns = NULL;
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PatternPtr p = NULL;
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static int firstTime = 1;
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const char **s;
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if (firstTime) {
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/* precompile stdPatterns */
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firstTime = 0;
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for (p = stdPatterns; p->pattern; p++)
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if ((e = regcomp(&p->rex, p->pattern, REG_EXTENDED)) != 0) {
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regerror(e, &p->rex, errmsg, sizeof(errmsg));
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FatalError("InitPatterns: regcomp error for `%s': %s\n",
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p->pattern, errmsg);
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}
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}
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if (patternlist) {
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for (i = 0, s = patternlist; *s; i++, s++)
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if (*s == DEFAULT_LIST)
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i += ARRAY_SIZE(stdPatterns) - 1 - 1;
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patterns = calloc(i + 1, sizeof(PatternRec));
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if (!patterns) {
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return NULL;
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}
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for (i = 0, s = patternlist; *s; i++, s++)
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if (*s != DEFAULT_LIST) {
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p = patterns + i;
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p->pattern = *s;
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if ((e = regcomp(&p->rex, p->pattern, REG_EXTENDED)) != 0) {
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regerror(e, &p->rex, errmsg, sizeof(errmsg));
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ErrorF("InitPatterns: regcomp error for `%s': %s\n",
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p->pattern, errmsg);
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i--;
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}
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}
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else {
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for (p = stdPatterns; p->pattern; p++, i++)
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patterns[i] = *p;
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if (p != stdPatterns)
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i--;
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}
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patterns[i].pattern = NULL;
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}
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else
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patterns = stdPatterns;
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return patterns;
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}
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static void
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FreePatterns(PatternPtr patterns)
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{
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if (patterns && patterns != stdPatterns)
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free(patterns);
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}
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static char *
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FindModuleInSubdir(const char *dirpath, const char *module)
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{
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struct dirent *direntry = NULL;
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DIR *dir = NULL;
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char *ret = NULL, tmpBuf[PATH_MAX];
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struct stat stat_buf;
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dir = opendir(dirpath);
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if (!dir)
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return NULL;
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while ((direntry = readdir(dir))) {
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if (direntry->d_name[0] == '.')
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continue;
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snprintf(tmpBuf, PATH_MAX, "%s%s/", dirpath, direntry->d_name);
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/* the stat with the appended / fails for normal files,
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and works for sub dirs fine, looks a bit strange in strace
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but does seem to work */
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if ((stat(tmpBuf, &stat_buf) == 0) && S_ISDIR(stat_buf.st_mode)) {
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if ((ret = FindModuleInSubdir(tmpBuf, module)))
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break;
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continue;
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}
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snprintf(tmpBuf, PATH_MAX, "lib%s.so", module);
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if (strcmp(direntry->d_name, tmpBuf) == 0) {
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if (asprintf(&ret, "%s%s", dirpath, tmpBuf) == -1)
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ret = NULL;
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break;
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}
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snprintf(tmpBuf, PATH_MAX, "%s_drv.so", module);
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if (strcmp(direntry->d_name, tmpBuf) == 0) {
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if (asprintf(&ret, "%s%s", dirpath, tmpBuf) == -1)
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ret = NULL;
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break;
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}
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snprintf(tmpBuf, PATH_MAX, "%s.so", module);
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if (strcmp(direntry->d_name, tmpBuf) == 0) {
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if (asprintf(&ret, "%s%s", dirpath, tmpBuf) == -1)
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ret = NULL;
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break;
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}
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}
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closedir(dir);
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return ret;
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}
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static char *
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FindModule(const char *module, const char *dirname, PatternPtr patterns)
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{
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char buf[PATH_MAX + 1];
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char *name = NULL;
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const char **s;
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if (strlen(dirname) > PATH_MAX)
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return NULL;
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for (s = stdSubdirs; *s; s++) {
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snprintf(buf, PATH_MAX, "%s%s", dirname, *s);
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if ((name = FindModuleInSubdir(buf, module)))
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break;
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}
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return name;
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}
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const char **
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LoaderListDir(const char *subdir, const char **patternlist)
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{
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char buf[PATH_MAX + 1];
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char **pathlist;
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char **elem;
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PatternPtr patterns = NULL;
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PatternPtr p;
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DIR *d;
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struct dirent *dp;
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regmatch_t match[2];
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struct stat stat_buf;
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int len, dirlen;
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char *fp;
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char **listing = NULL;
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char **save;
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char **ret = NULL;
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int n = 0;
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if (!(pathlist = defaultPathList))
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return NULL;
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if (!(patterns = InitPatterns(patternlist)))
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goto bail;
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for (elem = pathlist; *elem; elem++) {
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dirlen = snprintf(buf, PATH_MAX, "%s/%s", *elem, subdir);
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fp = buf + dirlen;
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if (stat(buf, &stat_buf) == 0 && S_ISDIR(stat_buf.st_mode) &&
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(d = opendir(buf))) {
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if (buf[dirlen - 1] != '/') {
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buf[dirlen++] = '/';
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fp++;
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}
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while ((dp = readdir(d))) {
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if (dirlen + strlen(dp->d_name) > PATH_MAX)
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continue;
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strcpy(fp, dp->d_name);
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if (!(stat(buf, &stat_buf) == 0 && S_ISREG(stat_buf.st_mode)))
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continue;
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for (p = patterns; p->pattern; p++) {
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if (regexec(&p->rex, dp->d_name, 2, match, 0) == 0 &&
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match[1].rm_so != -1) {
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len = match[1].rm_eo - match[1].rm_so;
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save = listing;
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listing = reallocarray(listing, n + 2, sizeof(char *));
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if (!listing) {
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if (save) {
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save[n] = NULL;
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FreeStringList(save);
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}
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closedir(d);
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goto bail;
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}
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listing[n] = calloc(1, len + 1);
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if (!listing[n]) {
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FreeStringList(listing);
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closedir(d);
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goto bail;
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}
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strncpy(listing[n], dp->d_name + match[1].rm_so, len);
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listing[n][len] = '\0';
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n++;
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break;
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}
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}
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}
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closedir(d);
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}
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}
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if (listing)
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listing[n] = NULL;
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ret = listing;
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bail:
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FreePatterns(patterns);
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return (const char **) ret;
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}
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static Bool
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CheckVersion(const char *module, XF86ModuleVersionInfo * data,
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const XF86ModReqInfo * req)
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{
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int vercode[4];
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long ver = data->xf86version;
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/* Always ignore ABI mismatches by default */
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LoaderOptions |= LDR_OPT_ABI_MISMATCH_NONFATAL;
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MessageType errtype;
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LogMessage(X_INFO, "Module %s: vendor=\"%s\"\n",
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data->modname ? data->modname : "UNKNOWN!",
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data->vendor ? data->vendor : "UNKNOWN!");
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vercode[0] = ver / 10000000;
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vercode[1] = (ver / 100000) % 100;
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vercode[2] = (ver / 1000) % 100;
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vercode[3] = ver % 1000;
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LogMessageVerb(X_NONE, 1, "\tcompiled for %d.%d.%d", vercode[0], vercode[1], vercode[2]);
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if (vercode[3] != 0)
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LogMessageVerb(X_NONE, 1, ".%d", vercode[3]);
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LogMessageVerb(X_NONE, 1, ", module version = %d.%d.%d\n", data->majorversion,
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data->minorversion, data->patchlevel);
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if (data->moduleclass)
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LogMessageVerb(X_NONE, 2, "\tModule class: %s\n", data->moduleclass);
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ver = -1;
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if (data->abiclass) {
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int abimaj, abimin;
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int vermaj, vermin;
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if (!strcmp(data->abiclass, ABI_CLASS_ANSIC))
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ver = LoaderVersionInfo.ansicVersion;
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else if (!strcmp(data->abiclass, ABI_CLASS_VIDEODRV))
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ver = LoaderVersionInfo.videodrvVersion;
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else if (!strcmp(data->abiclass, ABI_CLASS_XINPUT))
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ver = LoaderVersionInfo.xinputVersion;
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else if (!strcmp(data->abiclass, ABI_CLASS_EXTENSION))
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ver = LoaderVersionInfo.extensionVersion;
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abimaj = GET_ABI_MAJOR(data->abiversion);
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abimin = GET_ABI_MINOR(data->abiversion);
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LogMessageVerb(X_NONE, 2, "\tABI class: %s, version %d.%d\n",
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data->abiclass, abimaj, abimin);
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if (ver != -1) {
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vermaj = GET_ABI_MAJOR(ver);
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vermin = GET_ABI_MINOR(ver);
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if (abimaj != vermaj) {
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/* Always warn, never error out and crash X server */
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LogMessageVerb(X_WARNING, 0,
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"%s: module ABI major version (%d) "
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"doesn't match the server's version (%d)\n",
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module, abimaj, vermaj);
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}
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else if (abimin > vermin) {
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/* Ditto for minor‐version */
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LogMessageVerb(X_WARNING, 0,
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"%s: module ABI minor version (%d) "
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"is newer than the server's version (%d)\n",
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module, abimin, vermin);
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}
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}
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}
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/* Check against requirements that the caller has specified */
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if (req) {
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if (data->majorversion != req->majorversion) {
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LogMessageVerb(X_WARNING, 2, "%s: module major version (%d) "
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"doesn't match required major version (%d)\n",
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module, data->majorversion, req->majorversion);
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return FALSE;
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}
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else if (data->minorversion < req->minorversion) {
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LogMessageVerb(X_WARNING, 2, "%s: module minor version (%d) is "
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"less than the required minor version (%d)\n",
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module, data->minorversion, req->minorversion);
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return FALSE;
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}
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else if (data->minorversion == req->minorversion &&
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data->patchlevel < req->patchlevel) {
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LogMessageVerb(X_WARNING, 2, "%s: module patch level (%d) "
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"is less than the required patch level "
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"(%d)\n", module, data->patchlevel, req->patchlevel);
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return FALSE;
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}
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if (req->moduleclass) {
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if (!data->moduleclass ||
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strcmp(req->moduleclass, data->moduleclass)) {
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LogMessageVerb(X_WARNING, 2, "%s: Module class (%s) doesn't "
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"match the required class (%s)\n", module,
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data->moduleclass ? data->moduleclass : "<NONE>",
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req->moduleclass);
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return FALSE;
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}
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}
|
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else if (req->abiclass != ABI_CLASS_NONE) {
|
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if (!data->abiclass || strcmp(req->abiclass, data->abiclass)) {
|
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LogMessageVerb(X_WARNING, 2, "%s: ABI class (%s) doesn't match"
|
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" the required ABI class (%s)\n", module,
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data->abiclass ? data->abiclass : "<NONE>",
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req->abiclass);
|
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return FALSE;
|
||
}
|
||
}
|
||
if (req->abiclass != ABI_CLASS_NONE) {
|
||
int reqmaj, reqmin, maj, min;
|
||
|
||
reqmaj = GET_ABI_MAJOR(req->abiversion);
|
||
reqmin = GET_ABI_MINOR(req->abiversion);
|
||
maj = GET_ABI_MAJOR(data->abiversion);
|
||
min = GET_ABI_MINOR(data->abiversion);
|
||
if (maj != reqmaj) {
|
||
LogMessageVerb(X_WARNING, 2, "%s: ABI major version (%d) "
|
||
"doesn't match the required ABI major version "
|
||
"(%d)\n", module, maj, reqmaj);
|
||
return FALSE;
|
||
}
|
||
/* XXX Maybe this should be the other way around? */
|
||
if (min > reqmin) {
|
||
LogMessageVerb(X_WARNING, 2, "%s: module ABI minor version "
|
||
"(%d) is newer than that available (%d)\n",
|
||
module, min, reqmin);
|
||
return FALSE;
|
||
}
|
||
}
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
static ModuleDescPtr
|
||
AddSibling(ModuleDescPtr head, ModuleDescPtr new)
|
||
{
|
||
new->sib = head;
|
||
return new;
|
||
}
|
||
|
||
void *
|
||
LoadSubModule(void *_parent, const char *module,
|
||
const char **subdirlist, const char **patternlist,
|
||
void *options, const XF86ModReqInfo * modreq,
|
||
int *errmaj, int *errmin)
|
||
{
|
||
ModuleDescPtr submod;
|
||
ModuleDescPtr parent = (ModuleDescPtr) _parent;
|
||
|
||
LogMessageVerb(X_INFO, 3, "Loading sub module \"%s\"\n", module);
|
||
|
||
if (PathIsAbsolute(module)) {
|
||
LogMessage(X_ERROR, "LoadSubModule: "
|
||
"Absolute module path not permitted: \"%s\"\n", module);
|
||
if (errmaj)
|
||
*errmaj = LDR_BADUSAGE;
|
||
if (errmin)
|
||
*errmin = 0;
|
||
return NULL;
|
||
}
|
||
|
||
submod = LoadModule(module, options, modreq, errmaj);
|
||
if (submod && submod != (ModuleDescPtr) 1) {
|
||
parent->child = AddSibling(parent->child, submod);
|
||
submod->parent = parent;
|
||
}
|
||
return submod;
|
||
}
|
||
|
||
ModuleDescPtr
|
||
DuplicateModule(ModuleDescPtr mod, ModuleDescPtr parent)
|
||
{
|
||
ModuleDescPtr ret;
|
||
|
||
if (!mod)
|
||
return NULL;
|
||
|
||
ret = calloc(1, sizeof(ModuleDesc));
|
||
if (ret == NULL)
|
||
return NULL;
|
||
|
||
ret->handle = mod->handle;
|
||
|
||
ret->SetupProc = mod->SetupProc;
|
||
ret->TearDownProc = mod->TearDownProc;
|
||
ret->TearDownData = ModuleDuplicated;
|
||
ret->child = DuplicateModule(mod->child, ret);
|
||
ret->sib = DuplicateModule(mod->sib, parent);
|
||
ret->parent = parent;
|
||
ret->VersionInfo = mod->VersionInfo;
|
||
|
||
return ret;
|
||
}
|
||
|
||
static const char *compiled_in_modules[] = {
|
||
"ddc",
|
||
"fb",
|
||
"i2c",
|
||
"ramdac",
|
||
"dbe",
|
||
"record",
|
||
"extmod",
|
||
"dri",
|
||
"dri2",
|
||
#ifdef DRI3
|
||
"dri3",
|
||
#endif
|
||
#ifdef PRESENT
|
||
"present",
|
||
#endif
|
||
NULL
|
||
};
|
||
|
||
/*
|
||
* LoadModule: load a module
|
||
*
|
||
* module The module name. Normally this is not a filename but the
|
||
* module's "canonical name. A full pathname is, however,
|
||
* also accepted.
|
||
* options A NULL terminated list of Options that are passed to the
|
||
* module's SetupProc function.
|
||
* modreq An optional XF86ModReqInfo* containing
|
||
* version/ABI/vendor-ABI requirements to check for when
|
||
* loading the module. The following fields of the
|
||
* XF86ModReqInfo struct are checked:
|
||
* majorversion - must match the module's majorversion exactly
|
||
* minorversion - the module's minorversion must be >= this
|
||
* patchlevel - the module's minorversion.patchlevel must be
|
||
* >= this. Patchlevel is ignored when
|
||
* minorversion is not set.
|
||
* abiclass - (string) must match the module's abiclass
|
||
* abiversion - must be consistent with the module's
|
||
* abiversion (major equal, minor no older)
|
||
* moduleclass - string must match the module's moduleclass
|
||
* string
|
||
* "don't care" values are ~0 for numbers, and NULL for strings
|
||
* errmaj Major error return.
|
||
*
|
||
*/
|
||
ModuleDescPtr
|
||
LoadModule(const char *module, void *options, const XF86ModReqInfo *modreq,
|
||
int *errmaj)
|
||
{
|
||
XF86ModuleData *initdata = NULL;
|
||
char **pathlist = NULL;
|
||
char *found = NULL;
|
||
char *name = NULL;
|
||
char **path_elem = NULL;
|
||
char *p = NULL;
|
||
ModuleDescPtr ret = NULL;
|
||
PatternPtr patterns = NULL;
|
||
int noncanonical = 0;
|
||
char *m = NULL;
|
||
const char **cim;
|
||
|
||
LogMessageVerb(X_INFO, 3, "LoadModule: \"%s\"", module);
|
||
|
||
patterns = InitPatterns(NULL);
|
||
name = LoaderGetCanonicalName(module, patterns);
|
||
noncanonical = (name && strcmp(module, name) != 0);
|
||
if (noncanonical) {
|
||
LogMessageVerb(X_NONE, 3, " (%s)\n", name);
|
||
LogMessageVerb(X_WARNING, 1,
|
||
"LoadModule: given non-canonical module name \"%s\"\n",
|
||
module);
|
||
m = name;
|
||
}
|
||
else {
|
||
LogMessageVerb(X_NONE, 3, "\n");
|
||
m = (char *) module;
|
||
}
|
||
|
||
/* Backward compatibility, vbe and int10 are merged into int10 now */
|
||
if (!strcmp(m, "vbe"))
|
||
m = name = strdup("int10");
|
||
|
||
assert(m);
|
||
|
||
for (cim = compiled_in_modules; *cim; cim++)
|
||
if (!strcmp(m, *cim)) {
|
||
LogMessageVerb(X_INFO, 3, "Module \"%s\" already built-in\n", m);
|
||
ret = (ModuleDescPtr) 1;
|
||
goto LoadModule_exit;
|
||
}
|
||
|
||
if (!name) {
|
||
if (errmaj)
|
||
*errmaj = LDR_BADUSAGE;
|
||
goto LoadModule_fail;
|
||
}
|
||
ret = calloc(1, sizeof(ModuleDesc));
|
||
if (!ret) {
|
||
if (errmaj)
|
||
*errmaj = LDR_NOMEM;
|
||
goto LoadModule_fail;
|
||
}
|
||
|
||
pathlist = defaultPathList;
|
||
if (!pathlist) {
|
||
/* This could be a calloc failure too */
|
||
if (errmaj)
|
||
*errmaj = LDR_BADUSAGE;
|
||
goto LoadModule_fail;
|
||
}
|
||
|
||
/*
|
||
* if the module name is not a full pathname, we need to
|
||
* check the elements in the path
|
||
*/
|
||
if (PathIsAbsolute(module))
|
||
found = Xstrdup(module);
|
||
path_elem = pathlist;
|
||
while (!found && *path_elem != NULL) {
|
||
found = FindModule(m, *path_elem, patterns);
|
||
path_elem++;
|
||
/*
|
||
* When the module name isn't the canonical name, search for the
|
||
* former if no match was found for the latter.
|
||
*/
|
||
if (!*path_elem && m == name) {
|
||
path_elem = pathlist;
|
||
m = (char *) module;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* did we find the module?
|
||
*/
|
||
if (!found) {
|
||
LogMessage(X_WARNING, "Warning, couldn't open module %s\n", module);
|
||
if (errmaj)
|
||
*errmaj = LDR_NOENT;
|
||
goto LoadModule_fail;
|
||
}
|
||
ret->handle = LoaderOpen(found, errmaj);
|
||
if (ret->handle == NULL)
|
||
goto LoadModule_fail;
|
||
|
||
/* drop any explicit suffix from the module name */
|
||
p = strchr(name, '.');
|
||
if (p)
|
||
*p = '\0';
|
||
|
||
/*
|
||
* now check if the special data object <modulename>ModuleData is
|
||
* present.
|
||
*/
|
||
if (asprintf(&p, "%sModuleData", name) == -1) {
|
||
p = NULL;
|
||
if (errmaj)
|
||
*errmaj = LDR_NOMEM;
|
||
goto LoadModule_fail;
|
||
}
|
||
initdata = LoaderSymbolFromModule(ret, p);
|
||
if (initdata) {
|
||
ModuleSetupProc setup;
|
||
ModuleTearDownProc teardown;
|
||
XF86ModuleVersionInfo *vers;
|
||
|
||
vers = initdata->vers;
|
||
setup = initdata->setup;
|
||
teardown = initdata->teardown;
|
||
|
||
if (vers) {
|
||
if (!CheckVersion(module, vers, modreq)) {
|
||
if (errmaj)
|
||
*errmaj = LDR_MISMATCH;
|
||
goto LoadModule_fail;
|
||
}
|
||
}
|
||
else {
|
||
LogMessage(X_ERROR, "LoadModule: Module %s does not supply"
|
||
" version information\n", module);
|
||
if (errmaj)
|
||
*errmaj = LDR_INVALID;
|
||
goto LoadModule_fail;
|
||
}
|
||
if (setup)
|
||
ret->SetupProc = setup;
|
||
if (teardown)
|
||
ret->TearDownProc = teardown;
|
||
ret->VersionInfo = vers;
|
||
}
|
||
else {
|
||
/* no initdata, fail the load */
|
||
LogMessage(X_ERROR, "LoadModule: Module %s does not have a %s "
|
||
"data object.\n", module, p);
|
||
if (errmaj)
|
||
*errmaj = LDR_INVALID;
|
||
goto LoadModule_fail;
|
||
}
|
||
if (ret->SetupProc) {
|
||
ret->TearDownData = ret->SetupProc(ret, options, errmaj, NULL);
|
||
if (!ret->TearDownData) {
|
||
goto LoadModule_fail;
|
||
}
|
||
}
|
||
else if (options) {
|
||
LogMessage(X_WARNING, "Module Options present, but no SetupProc "
|
||
"available for %s\n", module);
|
||
}
|
||
goto LoadModule_exit;
|
||
|
||
LoadModule_fail:
|
||
UnloadModule(ret);
|
||
ret = NULL;
|
||
|
||
LoadModule_exit:
|
||
FreePatterns(patterns);
|
||
free(found);
|
||
free(name);
|
||
free(p);
|
||
|
||
return ret;
|
||
}
|
||
|
||
void
|
||
UnloadModule(ModuleDescPtr mod)
|
||
{
|
||
if (mod == (ModuleDescPtr) 1)
|
||
return;
|
||
|
||
if (mod == NULL)
|
||
return;
|
||
|
||
if (mod->VersionInfo) {
|
||
const char *name = mod->VersionInfo->modname;
|
||
|
||
if (mod->parent)
|
||
LogMessageVerb(X_INFO, 3, "UnloadSubModule: \"%s\"\n", name);
|
||
else
|
||
LogMessageVerb(X_INFO, 3, "UnloadModule: \"%s\"\n", name);
|
||
|
||
if (mod->TearDownData != ModuleDuplicated) {
|
||
if ((mod->TearDownProc) && (mod->TearDownData))
|
||
mod->TearDownProc(mod->TearDownData);
|
||
LoaderUnload(name, mod->handle);
|
||
}
|
||
}
|
||
|
||
if (mod->child)
|
||
UnloadModule(mod->child);
|
||
if (mod->sib)
|
||
UnloadModule(mod->sib);
|
||
free(mod);
|
||
}
|
||
|
||
void
|
||
UnloadSubModule(ModuleDescPtr mod)
|
||
{
|
||
/* Some drivers are calling us on built-in submodules, ignore them */
|
||
if (mod == (ModuleDescPtr) 1)
|
||
return;
|
||
RemoveChild(mod);
|
||
UnloadModule(mod);
|
||
}
|
||
|
||
static void
|
||
RemoveChild(ModuleDescPtr child)
|
||
{
|
||
ModuleDescPtr mdp;
|
||
ModuleDescPtr prevsib;
|
||
ModuleDescPtr parent;
|
||
|
||
if (!child->parent)
|
||
return;
|
||
|
||
parent = child->parent;
|
||
if (parent->child == child) {
|
||
parent->child = child->sib;
|
||
return;
|
||
}
|
||
|
||
prevsib = parent->child;
|
||
mdp = prevsib->sib;
|
||
while (mdp && mdp != child) {
|
||
prevsib = mdp;
|
||
mdp = mdp->sib;
|
||
}
|
||
if (mdp == child)
|
||
prevsib->sib = child->sib;
|
||
child->sib = NULL;
|
||
return;
|
||
}
|
||
|
||
void
|
||
LoaderErrorMsg(const char *name, const char *modname, int errmaj, int errmin)
|
||
{
|
||
const char *msg;
|
||
MessageType type = X_ERROR;
|
||
|
||
switch (errmaj) {
|
||
case LDR_NOERROR:
|
||
msg = "no error";
|
||
break;
|
||
case LDR_NOMEM:
|
||
msg = "out of memory";
|
||
break;
|
||
case LDR_NOENT:
|
||
msg = "module does not exist";
|
||
break;
|
||
case LDR_NOLOAD:
|
||
msg = "loader failed";
|
||
break;
|
||
case LDR_ONCEONLY:
|
||
msg = "already loaded";
|
||
type = X_INFO;
|
||
break;
|
||
case LDR_MISMATCH:
|
||
msg = "module requirement mismatch";
|
||
break;
|
||
case LDR_BADUSAGE:
|
||
msg = "invalid argument(s) to LoadModule()";
|
||
break;
|
||
case LDR_INVALID:
|
||
msg = "invalid module";
|
||
break;
|
||
case LDR_BADOS:
|
||
msg = "module doesn't support this OS";
|
||
break;
|
||
case LDR_MODSPECIFIC:
|
||
msg = "module-specific error";
|
||
break;
|
||
default:
|
||
msg = "unknown error";
|
||
}
|
||
if (name)
|
||
LogMessage(type, "%s: Failed to load module \"%s\" (%s, %d)\n",
|
||
name, modname, msg, errmin);
|
||
else
|
||
LogMessage(type, "Failed to load module \"%s\" (%s, %d)\n",
|
||
modname, msg, errmin);
|
||
}
|
||
|
||
/* Given a module path or file name, return the module's canonical name */
|
||
static char *
|
||
LoaderGetCanonicalName(const char *modname, PatternPtr patterns)
|
||
{
|
||
const char *s;
|
||
int len;
|
||
PatternPtr p;
|
||
regmatch_t match[2];
|
||
|
||
/* Strip off any leading path */
|
||
s = strrchr(modname, '/');
|
||
if (s == NULL)
|
||
s = modname;
|
||
else
|
||
s++;
|
||
|
||
/* Find the first regex that is matched */
|
||
for (p = patterns; p->pattern; p++)
|
||
if (regexec(&p->rex, s, 2, match, 0) == 0 && match[1].rm_so != -1) {
|
||
len = match[1].rm_eo - match[1].rm_so;
|
||
char *str = calloc(1, len + 1);
|
||
if (!str)
|
||
return NULL;
|
||
strncpy(str, s + match[1].rm_so, len);
|
||
str[len] = '\0';
|
||
return str;
|
||
}
|
||
|
||
/* If there is no match, return the whole name minus the leading path */
|
||
return strdup(s);
|
||
}
|
||
|
||
/*
|
||
* Return the module version information.
|
||
*/
|
||
unsigned long
|
||
LoaderGetModuleVersion(ModuleDescPtr mod)
|
||
{
|
||
if (!mod || mod == (ModuleDescPtr) 1 || !mod->VersionInfo)
|
||
return 0;
|
||
|
||
return MODULE_VERSION_NUMERIC(mod->VersionInfo->majorversion,
|
||
mod->VersionInfo->minorversion,
|
||
mod->VersionInfo->patchlevel);
|
||
}
|