diff options
Diffstat (limited to 'xorg-server/hw/xfree86/loader/loader.c')
| -rw-r--r-- | xorg-server/hw/xfree86/loader/loader.c | 188 |
1 files changed, 48 insertions, 140 deletions
diff --git a/xorg-server/hw/xfree86/loader/loader.c b/xorg-server/hw/xfree86/loader/loader.c index 7ea934a89..32c4431de 100644 --- a/xorg-server/hw/xfree86/loader/loader.c +++ b/xorg-server/hw/xfree86/loader/loader.c @@ -54,18 +54,10 @@ #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__))
-#include <malloc.h>
-#endif
#include <stdarg.h>
#include "os.h"
@@ -75,44 +67,34 @@ #include "xf86Priv.h"
#include "compiler.h"
-extern void *xorg_symbols[];
-
-#define MAX_HANDLE 256
-static int refCount[MAX_HANDLE];
-
-static int moduleseq = 0;
-
-/* Prototypes for static functions. */
-static loaderPtr listHead = NULL;
+#ifdef HAVE_DLFCN_H
-static loaderPtr
-_LoaderListPush(void)
-{
- loaderPtr item = calloc(1, sizeof(struct _loader));
-
- item->next = listHead;
- listHead = item;
+#include <dlfcn.h>
+#include <X11/Xos.h>
- return item;
-}
+#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
-static loaderPtr
-_LoaderListPop(int handle)
-{
- loaderPtr item = listHead;
- loaderPtr *bptr = &listHead; /* pointer to previous node */
+#if defined(LD_GLOBAL)
+#define DLOPEN_GLOBAL LD_GLOBAL
+#elif defined(RTLD_GLOBAL)
+#define DLOPEN_GLOBAL RTLD_GLOBAL
+#else
+#define DLOPEN_GLOBAL 0
+#endif
- while (item) {
- if (item->handle == handle) {
- *bptr = item->next; /* remove this from the list */
- return item;
- }
- bptr = &(item->next);
- item = item->next;
- }
+#else
+#error i have no dynamic linker and i must scream
+#endif
- return 0;
-}
+extern void *xorg_symbols[];
void
LoaderInit(void)
@@ -149,134 +131,60 @@ LoaderInit(void) 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);
+ LoaderOpen (path, &errmaj, &errmin, &wasLoaded, 0);
}
#endif
}
/* Public Interface to the loader. */
-int
-LoaderOpen(const char *module, const char *cname, int handle,
- int *errmaj, int *errmin, int *wasLoaded, int flags)
+void *
+LoaderOpen(const char *module, int *errmaj, int *errmin)
{
- loaderPtr tmp;
- int new_handle;
+ void *ret;
#if defined(DEBUG)
ErrorF("LoaderOpen(%s)\n", module);
#endif
- /* Is the module already loaded? */
- 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 (new_handle < MAX_HANDLE && refCount[new_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;
- }
-
- refCount[new_handle] = 1;
-
- tmp = _LoaderListPush();
- tmp->name = strdup(module);
- tmp->cname = strdup(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);
- refCount[new_handle] = 0;
+ if (!(ret = dlopen(module, DLOPEN_LAZY | DLOPEN_GLOBAL))) {
+ xf86Msg(X_ERROR, "Failed to load %s: %s\n", module, dlerror());
if (errmaj)
*errmaj = LDR_NOLOAD;
if (errmin)
*errmin = LDR_NOLOAD;
- return -1;
+ return NULL;
}
- return new_handle;
-}
-
-int
-LoaderHandleOpen(int handle)
-{
- if (handle < 0 || handle >= MAX_HANDLE)
- return -1;
-
- if (!refCount[handle])
- return -1;
-
- refCount[handle]++;
- return handle;
+ return ret;
}
void *
-LoaderSymbol(const char *sym)
+LoaderSymbol(const char *name)
{
- return (DLFindSymbol(sym));
-}
+ static void *global_scope = NULL;
+ void *p;
-int
-LoaderUnload(int handle)
-{
- loaderRec fakeHead;
- loaderPtr tmp = &fakeHead;
+ p = dlsym(RTLD_DEFAULT, name);
+ if (p != NULL)
+ return p;
- if (handle < 0 || handle >= MAX_HANDLE)
- return -1;
+ if (!global_scope)
+ global_scope = dlopen(NULL, DLOPEN_LAZY | DLOPEN_GLOBAL);
- /*
- * check the reference count, only free it if it goes to zero
- */
- if (--refCount[handle])
- return 0;
- /*
- * find the loaderRecs associated with this handle.
- */
+ if (global_scope)
+ return dlsym(global_scope, name);
- while ((tmp = _LoaderListPop(handle)) != NULL) {
- xf86Msg(X_INFO, "Unloading %s\n", tmp->name);
- DLUnloadModule(tmp->private);
- free(tmp->name);
- free(tmp->cname);
- free(tmp);
- }
+ return NULL;
+}
- return 0;
+void
+LoaderUnload(const char *name, void *handle)
+{
+ xf86Msg(X_INFO, "Unloading %s\n", name);
+ dlclose(handle);
}
unsigned long LoaderOptions = 0;
|