387 lines
10 KiB
C
387 lines
10 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) 1997-2003 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 <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#if defined(UseMMAP) || (defined(linux) && defined(__ia64__))
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#include <sys/mman.h>
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#endif
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#if defined(linux) && \
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(defined(__alpha__) || defined(__powerpc__) || defined(__ia64__) \
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|| defined(__amd64__))
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#include <malloc.h>
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#endif
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#include <stdarg.h>
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#include "os.h"
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#include "loader.h"
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#include "loaderProcs.h"
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "compiler.h"
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#include "sym.h"
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/*
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* handles are used to identify files that are loaded. Even archives
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* are counted as a single file.
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*/
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#define MAX_HANDLE 256
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#define HANDLE_FREE 0
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#define HANDLE_USED 1
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static char freeHandles[MAX_HANDLE];
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static int refCount[MAX_HANDLE];
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/*
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* modules are used to identify compilation units (ie object modules).
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* Archives contain multiple modules, each of which is treated seperately.
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*/
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static int moduleseq = 0;
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/* Prototypes for static functions. */
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static loaderPtr _LoaderListPush(void);
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static loaderPtr _LoaderListPop(int);
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void
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LoaderInit(void)
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{
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const char *osname = NULL;
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char *ld_bind_now = getenv("LD_BIND_NOW");
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if (ld_bind_now && *ld_bind_now) {
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xf86Msg(X_ERROR, "LD_BIND_NOW is set, dlloader will NOT work!\n");
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}
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xf86MsgVerb(X_INFO, 2, "Loader magic: %p\n", (void *)
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((long)dixLookupTab ^ (long)extLookupTab
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^ (long)miLookupTab ^ (long)xfree86LookupTab));
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xf86MsgVerb(X_INFO, 2, "Module ABI versions:\n");
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xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_ANSIC,
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GET_ABI_MAJOR(LoaderVersionInfo.ansicVersion),
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GET_ABI_MINOR(LoaderVersionInfo.ansicVersion));
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xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_VIDEODRV,
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GET_ABI_MAJOR(LoaderVersionInfo.videodrvVersion),
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GET_ABI_MINOR(LoaderVersionInfo.videodrvVersion));
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xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_XINPUT,
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GET_ABI_MAJOR(LoaderVersionInfo.xinputVersion),
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GET_ABI_MINOR(LoaderVersionInfo.xinputVersion));
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xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_EXTENSION,
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GET_ABI_MAJOR(LoaderVersionInfo.extensionVersion),
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GET_ABI_MINOR(LoaderVersionInfo.extensionVersion));
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LoaderGetOS(&osname, NULL, NULL, NULL);
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if (osname)
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xf86MsgVerb(X_INFO, 2, "Loader running on %s\n", osname);
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#if defined(__UNIXWARE__) && !defined(__GNUC__)
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/* For UnixWare we need to load the C Runtime libraries which are
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* normally auto-linked by the compiler. Otherwise we are bound to
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* see unresolved symbols when trying to use the type "long long".
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* Obviously, this does not apply if the GNU C compiler is used.
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*/
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{
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int errmaj, errmin, wasLoaded; /* place holders */
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char *xcrtpath = DEFAULT_MODULE_PATH "/libcrt.a";
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char *uwcrtpath = "/usr/ccs/lib/libcrt.a";
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char *path;
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struct stat st;
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if(stat(xcrtpath, &st) < 0)
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path = uwcrtpath; /* fallback: try to get libcrt.a from the uccs */
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else
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path = xcrtpath; /* get the libcrt.a we compiled with */
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LoaderOpen (path, "libcrt", 0, &errmaj, &errmin, &wasLoaded);
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}
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#endif
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}
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static loaderPtr listHead = (loaderPtr) 0;
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static loaderPtr
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_LoaderListPush()
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{
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loaderPtr item = calloc(1, sizeof(struct _loader));
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item->next = listHead;
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listHead = item;
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return item;
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}
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static loaderPtr
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_LoaderListPop(int handle)
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{
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loaderPtr item = listHead;
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loaderPtr *bptr = &listHead; /* pointer to previous node */
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while (item) {
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if (item->handle == handle) {
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*bptr = item->next; /* remove this from the list */
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return item;
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}
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bptr = &(item->next);
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item = item->next;
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}
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return 0;
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}
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/* These four are just ABI stubs */
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_X_EXPORT void
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LoaderRefSymbols(const char *sym0, ...)
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{
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}
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_X_EXPORT void
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LoaderRefSymLists(const char **list0, ...)
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{
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}
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_X_EXPORT void
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LoaderReqSymLists(const char **list0, ...)
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{
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}
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_X_EXPORT void
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LoaderReqSymbols(const char *sym0, ...)
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{
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}
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/* Public Interface to the loader. */
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int
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LoaderOpen(const char *module, const char *cname, int handle,
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int *errmaj, int *errmin, int *wasLoaded, int flags)
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{
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loaderPtr tmp;
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int new_handle;
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#if defined(DEBUG)
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ErrorF("LoaderOpen(%s)\n", module);
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#endif
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/*
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* Check to see if the module is already loaded.
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* Only if we are loading it into an existing namespace.
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* If it is to be loaded into a new namespace, don't check.
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* Note: We only have one namespace.
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*/
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if (handle >= 0) {
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tmp = listHead;
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while (tmp) {
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#ifdef DEBUGLIST
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ErrorF("strcmp(%x(%s),{%x} %x(%s))\n", module, module,
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&(tmp->name), tmp->name, tmp->name);
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#endif
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if (!strcmp(module, tmp->name)) {
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refCount[tmp->handle]++;
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if (wasLoaded)
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*wasLoaded = 1;
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xf86MsgVerb(X_INFO, 2, "Reloading %s\n", module);
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return tmp->handle;
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}
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tmp = tmp->next;
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}
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}
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/*
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* OK, it's a new one. Add it.
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*/
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xf86Msg(X_INFO, "Loading %s\n", module);
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if (wasLoaded)
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*wasLoaded = 0;
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/*
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* Find a free handle.
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*/
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new_handle = 1;
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while (freeHandles[new_handle] && new_handle < MAX_HANDLE)
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new_handle++;
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if (new_handle == MAX_HANDLE) {
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xf86Msg(X_ERROR, "Out of loader space\n"); /* XXX */
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if (errmaj)
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*errmaj = LDR_NOSPACE;
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if (errmin)
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*errmin = LDR_NOSPACE;
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return -1;
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}
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freeHandles[new_handle] = HANDLE_USED;
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refCount[new_handle] = 1;
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tmp = _LoaderListPush();
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tmp->name = malloc(strlen(module) + 1);
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strcpy(tmp->name, module);
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tmp->cname = malloc(strlen(cname) + 1);
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strcpy(tmp->cname, cname);
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tmp->handle = new_handle;
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tmp->module = moduleseq++;
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if ((tmp->private = DLLoadModule(tmp, flags)) == NULL) {
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xf86Msg(X_ERROR, "Failed to load %s\n", module);
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_LoaderListPop(new_handle);
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freeHandles[new_handle] = HANDLE_FREE;
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if (errmaj)
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*errmaj = LDR_NOLOAD;
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if (errmin)
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*errmin = LDR_NOLOAD;
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return -1;
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}
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return new_handle;
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}
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int
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LoaderHandleOpen(int handle)
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{
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if (handle < 0 || handle >= MAX_HANDLE)
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return -1;
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if (freeHandles[handle] != HANDLE_USED)
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return -1;
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refCount[handle]++;
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return handle;
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}
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_X_EXPORT void *
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LoaderSymbol(const char *sym)
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{
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return (DLFindSymbol(sym));
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}
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/* more stub */
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_X_EXPORT int
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LoaderCheckUnresolved(int delay_flag)
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{
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return 0;
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}
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int
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LoaderUnload(int handle)
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{
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loaderRec fakeHead;
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loaderPtr tmp = &fakeHead;
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if (handle < 0 || handle >= MAX_HANDLE)
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return -1;
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/*
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* check the reference count, only free it if it goes to zero
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*/
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if (--refCount[handle])
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return 0;
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/*
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* find the loaderRecs associated with this handle.
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*/
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while ((tmp = _LoaderListPop(handle)) != NULL) {
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if (strchr(tmp->name, ':') == NULL) {
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/* It is not a member of an archive */
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xf86Msg(X_INFO, "Unloading %s\n", tmp->name);
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}
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DLUnloadModule(tmp->private);
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free(tmp->name);
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free(tmp->cname);
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free(tmp);
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}
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freeHandles[handle] = HANDLE_FREE;
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return 0;
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}
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unsigned long LoaderOptions = 0;
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void
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LoaderSetOptions(unsigned long opts)
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{
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LoaderOptions |= opts;
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}
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_X_EXPORT Bool
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LoaderShouldIgnoreABI(void)
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{
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return (LoaderOptions & LDR_OPT_ABI_MISMATCH_NONFATAL) != 0;
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}
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_X_EXPORT int
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LoaderGetABIVersion(const char *abiclass)
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{
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struct {
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const char *name;
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int version;
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} classes[] = {
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{ ABI_CLASS_ANSIC, LoaderVersionInfo.ansicVersion },
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{ ABI_CLASS_VIDEODRV, LoaderVersionInfo.videodrvVersion },
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{ ABI_CLASS_XINPUT, LoaderVersionInfo.xinputVersion },
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{ ABI_CLASS_EXTENSION, LoaderVersionInfo.extensionVersion },
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{ ABI_CLASS_FONT, LoaderVersionInfo.fontVersion },
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{ NULL, 0 }
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};
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int i;
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for(i = 0; classes[i].name; i++) {
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if(!strcmp(classes[i].name, abiclass)) {
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return classes[i].version;
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}
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}
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return 0;
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}
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