diff options
Diffstat (limited to 'xorg-server/hw/xfree86/loader/loader.c')
| -rw-r--r-- | xorg-server/hw/xfree86/loader/loader.c | 389 |
1 files changed, 389 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/loader/loader.c b/xorg-server/hw/xfree86/loader/loader.c new file mode 100644 index 000000000..a00269b70 --- /dev/null +++ b/xorg-server/hw/xfree86/loader/loader.c @@ -0,0 +1,389 @@ +/* + * Copyright 1995-1998 by Metro Link, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of Metro Link, Inc. not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. Metro Link, Inc. makes no + * representations about the suitability of this software for any purpose. + * It is provided "as is" without express or implied warranty. + * + * METRO LINK, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL METRO LINK, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ +/* + * Copyright (c) 1997-2003 by The XFree86 Project, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the name of the copyright holder(s) + * and author(s) shall not be used in advertising or otherwise to promote + * the sale, use or other dealings in this Software without prior written + * authorization from the copyright holder(s) and author(s). + */ + +#ifdef HAVE_XORG_CONFIG_H +#include <xorg-config.h> +#endif + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#if defined(UseMMAP) || (defined(linux) && defined(__ia64__)) +#include <sys/mman.h> +#endif +#include <unistd.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <string.h> +#if defined(linux) && \ + (defined(__alpha__) || defined(__powerpc__) || defined(__ia64__) \ + || defined(__amd64__) || defined(__x86_64__)) +#include <malloc.h> +#endif +#include <stdarg.h> + +#include "os.h" +#include "loader.h" +#include "loaderProcs.h" +#include "xf86.h" +#include "xf86Priv.h" +#include "compiler.h" +#include "sym.h" + +#if defined(Lynx) && defined(sun) +/* Cross build machine doesn;t have strerror() */ +#define strerror(err) "strerror unsupported" +#endif + +/* + * handles are used to identify files that are loaded. Even archives + * are counted as a single file. + */ +#define MAX_HANDLE 256 +#define HANDLE_FREE 0 +#define HANDLE_USED 1 +static char freeHandles[MAX_HANDLE]; +static int refCount[MAX_HANDLE]; + +/* + * modules are used to identify compilation units (ie object modules). + * Archives contain multiple modules, each of which is treated seperately. + */ +static int moduleseq = 0; + +/* Prototypes for static functions. */ +static loaderPtr _LoaderListPush(void); +static loaderPtr _LoaderListPop(int); + +void +LoaderInit(void) +{ + const char *osname = NULL; + + char *ld_bind_now = getenv("LD_BIND_NOW"); + if (ld_bind_now && *ld_bind_now) { + xf86Msg(X_ERROR, "LD_BIND_NOW is set, dlloader will NOT work!\n"); + } + + xf86MsgVerb(X_INFO, 2, "Loader magic: %p\n", (void *) + ((long)dixLookupTab ^ (long)extLookupTab + ^ (long)fontLookupTab ^ (long)miLookupTab + ^ (long)xfree86LookupTab)); + xf86MsgVerb(X_INFO, 2, "Module ABI versions:\n"); + xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_ANSIC, + GET_ABI_MAJOR(LoaderVersionInfo.ansicVersion), + GET_ABI_MINOR(LoaderVersionInfo.ansicVersion)); + xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_VIDEODRV, + GET_ABI_MAJOR(LoaderVersionInfo.videodrvVersion), + GET_ABI_MINOR(LoaderVersionInfo.videodrvVersion)); + xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_XINPUT, + GET_ABI_MAJOR(LoaderVersionInfo.xinputVersion), + GET_ABI_MINOR(LoaderVersionInfo.xinputVersion)); + xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_EXTENSION, + GET_ABI_MAJOR(LoaderVersionInfo.extensionVersion), + GET_ABI_MINOR(LoaderVersionInfo.extensionVersion)); + xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_FONT, + GET_ABI_MAJOR(LoaderVersionInfo.fontVersion), + GET_ABI_MINOR(LoaderVersionInfo.fontVersion)); + + LoaderGetOS(&osname, NULL, NULL, NULL); + if (osname) + xf86MsgVerb(X_INFO, 2, "Loader running on %s\n", osname); + +#if defined(__UNIXWARE__) && !defined(__GNUC__) + /* For UnixWare we need to load the C Runtime libraries which are + * normally auto-linked by the compiler. Otherwise we are bound to + * see unresolved symbols when trying to use the type "long long". + * Obviously, this does not apply if the GNU C compiler is used. + */ + { + int errmaj, errmin, wasLoaded; /* place holders */ + char *xcrtpath = DEFAULT_MODULE_PATH "/libcrt.a"; + char *uwcrtpath = "/usr/ccs/lib/libcrt.a"; + char *path; + struct stat st; + + if(stat(xcrtpath, &st) < 0) + path = uwcrtpath; /* fallback: try to get libcrt.a from the uccs */ + else + path = xcrtpath; /* get the libcrt.a we compiled with */ + LoaderOpen (path, "libcrt", 0, &errmaj, &errmin, &wasLoaded); + } +#endif +} + +static loaderPtr listHead = (loaderPtr) 0; + +static loaderPtr +_LoaderListPush() +{ + loaderPtr item = calloc(1, sizeof(struct _loader)); + + item->next = listHead; + listHead = item; + + return item; +} + +static loaderPtr +_LoaderListPop(int handle) +{ + loaderPtr item = listHead; + loaderPtr *bptr = &listHead; /* pointer to previous node */ + + while (item) { + if (item->handle == handle) { + *bptr = item->next; /* remove this from the list */ + return item; + } + bptr = &(item->next); + item = item->next; + } + + return 0; +} + +/* These four are just ABI stubs */ +_X_EXPORT void +LoaderRefSymbols(const char *sym0, ...) +{ +} + +_X_EXPORT void +LoaderRefSymLists(const char **list0, ...) +{ +} + +_X_EXPORT void +LoaderReqSymLists(const char **list0, ...) +{ +} + +_X_EXPORT void +LoaderReqSymbols(const char *sym0, ...) +{ +} + +/* Public Interface to the loader. */ + +int +LoaderOpen(const char *module, const char *cname, int handle, + int *errmaj, int *errmin, int *wasLoaded, int flags) +{ + loaderPtr tmp; + int new_handle; + +#if defined(DEBUG) + ErrorF("LoaderOpen(%s)\n", module); +#endif + + /* + * Check to see if the module is already loaded. + * Only if we are loading it into an existing namespace. + * If it is to be loaded into a new namespace, don't check. + * Note: We only have one namespace. + */ + if (handle >= 0) { + tmp = listHead; + while (tmp) { +#ifdef DEBUGLIST + ErrorF("strcmp(%x(%s),{%x} %x(%s))\n", module, module, + &(tmp->name), tmp->name, tmp->name); +#endif + if (!strcmp(module, tmp->name)) { + refCount[tmp->handle]++; + if (wasLoaded) + *wasLoaded = 1; + xf86MsgVerb(X_INFO, 2, "Reloading %s\n", module); + return tmp->handle; + } + tmp = tmp->next; + } + } + + /* + * OK, it's a new one. Add it. + */ + xf86Msg(X_INFO, "Loading %s\n", module); + if (wasLoaded) + *wasLoaded = 0; + + /* + * Find a free handle. + */ + new_handle = 1; + while (freeHandles[new_handle] && new_handle < MAX_HANDLE) + new_handle++; + + if (new_handle == MAX_HANDLE) { + xf86Msg(X_ERROR, "Out of loader space\n"); /* XXX */ + if (errmaj) + *errmaj = LDR_NOSPACE; + if (errmin) + *errmin = LDR_NOSPACE; + return -1; + } + + freeHandles[new_handle] = HANDLE_USED; + refCount[new_handle] = 1; + + tmp = _LoaderListPush(); + tmp->name = malloc(strlen(module) + 1); + strcpy(tmp->name, module); + tmp->cname = malloc(strlen(cname) + 1); + strcpy(tmp->cname, cname); + tmp->handle = new_handle; + tmp->module = moduleseq++; + + if ((tmp->private = DLLoadModule(tmp, flags)) == NULL) { + xf86Msg(X_ERROR, "Failed to load %s\n", module); + _LoaderListPop(new_handle); + freeHandles[new_handle] = HANDLE_FREE; + if (errmaj) + *errmaj = LDR_NOLOAD; + if (errmin) + *errmin = LDR_NOLOAD; + return -1; + } + + return new_handle; +} + +int +LoaderHandleOpen(int handle) +{ + if (handle < 0 || handle >= MAX_HANDLE) + return -1; + + if (freeHandles[handle] != HANDLE_USED) + return -1; + + refCount[handle]++; + return handle; +} + +_X_EXPORT void * +LoaderSymbol(const char *sym) +{ + return (DLFindSymbol(sym)); +} + +/* more stub */ +_X_EXPORT int +LoaderCheckUnresolved(int delay_flag) +{ + return 0; +} + +int +LoaderUnload(int handle) +{ + loaderRec fakeHead; + loaderPtr tmp = &fakeHead; + + if (handle < 0 || handle >= MAX_HANDLE) + return -1; + + /* + * check the reference count, only free it if it goes to zero + */ + if (--refCount[handle]) + return 0; + /* + * find the loaderRecs associated with this handle. + */ + + while ((tmp = _LoaderListPop(handle)) != NULL) { + if (strchr(tmp->name, ':') == NULL) { + /* It is not a member of an archive */ + xf86Msg(X_INFO, "Unloading %s\n", tmp->name); + } + DLUnloadModule(tmp->private); + free(tmp->name); + free(tmp->cname); + free(tmp); + } + + freeHandles[handle] = HANDLE_FREE; + + return 0; +} + +unsigned long LoaderOptions = 0; + +void +LoaderSetOptions(unsigned long opts) +{ + LoaderOptions |= opts; +} + +_X_EXPORT int +LoaderGetABIVersion(const char *abiclass) +{ + struct { + const char *name; + int version; + } classes[] = { + { ABI_CLASS_ANSIC, LoaderVersionInfo.ansicVersion }, + { ABI_CLASS_VIDEODRV, LoaderVersionInfo.videodrvVersion }, + { ABI_CLASS_XINPUT, LoaderVersionInfo.xinputVersion }, + { ABI_CLASS_EXTENSION, LoaderVersionInfo.extensionVersion }, + { ABI_CLASS_FONT, LoaderVersionInfo.fontVersion }, + { NULL, 0 } + }; + int i; + + for(i = 0; classes[i].name; i++) { + if(!strcmp(classes[i].name, abiclass)) { + return classes[i].version; + } + } + + return 0; +} |