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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /xorg-server/hw/xfree86/loader/dlloader.c
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Checked in the following released items:
xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz
Diffstat (limited to 'xorg-server/hw/xfree86/loader/dlloader.c')
-rw-r--r--xorg-server/hw/xfree86/loader/dlloader.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/loader/dlloader.c b/xorg-server/hw/xfree86/loader/dlloader.c
new file mode 100644
index 000000000..4caefd071
--- /dev/null
+++ b/xorg-server/hw/xfree86/loader/dlloader.c
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 1997 The XFree86 Project, 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 the
+ * XFree86 Project, Inc. not be used in advertising or publicity
+ * pertaining to distribution of the software without specific,
+ * written prior permission. The Xfree86 Project, Inc. makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THE XFREE86 PROJECT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE XFREE86 PROJECT, 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.
+ */
+
+/*
+ * Once upon a time, X had multiple loader backends, three of which were
+ * essentially libdl reimplementations. This was nonsense so we chucked
+ * it, but we still retain the factorization between loader API and
+ * platform implementation. This file is the libdl implementation, and
+ * currently the only backend. If you find yourself porting to a platform
+ * without working libdl - hpux, win32, some forsaken a.out host, etc. -
+ * make a new backend rather than hacking up this file.
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+
+#include <X11/Xos.h>
+#include "os.h"
+
+#include "loader.h"
+#include "dlloader.h"
+
+#if defined(DL_LAZY)
+#define DLOPEN_LAZY DL_LAZY
+#elif defined(RTLD_LAZY)
+#define DLOPEN_LAZY RTLD_LAZY
+#elif defined(__FreeBSD__)
+#define DLOPEN_LAZY 1
+#else
+#define DLOPEN_LAZY 0
+#endif
+
+#if defined(LD_GLOBAL)
+#define DLOPEN_GLOBAL LD_GLOBAL
+#elif defined(RTLD_GLOBAL)
+#define DLOPEN_GLOBAL RTLD_GLOBAL
+#else
+#define DLOPEN_GLOBAL 0
+#endif
+
+#if defined(CSRG_BASED) && !defined(__ELF__)
+#define DLSYM_PREFIX "_"
+#else
+#define DLSYM_PREFIX ""
+#endif
+
+/* Hooray, yet another open coded linked list! FIXME */
+typedef struct DLModuleList {
+ void *module;
+ struct DLModuleList *next;
+} DLModuleList;
+
+static DLModuleList *dlModuleList = NULL;
+
+static void *
+DLFindSymbolLocal(pointer module, const char *name)
+{
+ void *p;
+ char *n;
+
+ static const char symPrefix[] = DLSYM_PREFIX;
+
+ if (strlen(symPrefix)) {
+ n = malloc(strlen(symPrefix) + strlen(name) + 1);
+ sprintf(n, "%s%s", symPrefix, name);
+ } else {
+ n = name;
+ }
+
+ p = dlsym(module, n);
+
+ if (strlen(symPrefix))
+ free(n);
+
+ return p;
+}
+
+static void *global_scope = NULL;
+
+void *
+DLFindSymbol(const char *name)
+{
+ DLModuleList *l;
+ void *p;
+
+ p = dlsym(RTLD_DEFAULT, name);
+ if (p != NULL)
+ return p;
+
+ for (l = dlModuleList; l != NULL; l = l->next) {
+ p = DLFindSymbolLocal(l->module, name);
+ if (p)
+ return p;
+ }
+
+ if (!global_scope)
+ global_scope = dlopen(NULL, DLOPEN_LAZY | DLOPEN_GLOBAL);
+
+ if (global_scope)
+ return DLFindSymbolLocal(global_scope, name);
+
+ return NULL;
+}
+
+void *
+DLLoadModule(loaderPtr modrec, int flags)
+{
+ void * dlfile;
+ DLModuleList *l;
+ int dlopen_flags;
+
+ if (flags & LD_FLAG_GLOBAL)
+ dlopen_flags = DLOPEN_LAZY | DLOPEN_GLOBAL;
+ else
+ dlopen_flags = DLOPEN_LAZY;
+ dlfile = dlopen(modrec->name, dlopen_flags);
+ if (dlfile == NULL) {
+ ErrorF("dlopen: %s\n", dlerror());
+ return NULL;
+ }
+
+ l = malloc(sizeof(DLModuleList));
+ l->module = dlfile;
+ l->next = dlModuleList;
+ dlModuleList = l;
+
+ return (void *)dlfile;
+}
+
+void
+DLUnloadModule(void *modptr)
+{
+ DLModuleList *l, *p;
+
+ /* remove it from dlModuleList. */
+ if (dlModuleList->module == modptr) {
+ l = dlModuleList;
+ dlModuleList = l->next;
+ free(l);
+ } else {
+ p = dlModuleList;
+ for (l = dlModuleList->next; l != NULL; l = l->next) {
+ if (l->module == modptr) {
+ p->next = l->next;
+ free(l);
+ break;
+ }
+ p = l;
+ }
+ }
+ dlclose(modptr);
+}