patch-2.0.34 linux/kernel/module.c

• Lines: 64
• Date: Wed Jun 3 15:17:50 1998
• Orig file: v2.0.33/linux/kernel/module.c
• Orig date: Tue May 21 02:00:30 1996

diff -u --recursive --new-file v2.0.33/linux/kernel/module.c linux/kernel/module.c
@@ -86,7 +86,7 @@
 	int sspace = sizeof(struct module) + MOD_MAX_NAME;
 	char name[MOD_MAX_NAME];
 
-	if (!suser())
+	if (!suser() || securelevel > 0)
 		return -EPERM;
 	if (module_name == NULL || size == 0)
 		return -EINVAL;
@@ -138,7 +138,7 @@
 	int error;
 	struct mod_routines rt;
 
-	if (!suser())
+	if (!suser() || securelevel > 0)
 		return -EPERM;
 
 #ifdef __i386__
@@ -264,7 +264,7 @@
 	char name[MOD_MAX_NAME];
 	int error;
 
-	if (!suser())
+	if (!suser() || securelevel > 0)
 		return -EPERM;
 	/* else */
 	if (module_name != NULL) {
@@ -594,6 +594,36 @@
 	if (len > length)
 		len = length;
 	return len;
+}
+
+/*
+ * Gets the address for a symbol in the given module.  If modname is
+ * NULL, it looks for the name in any registered symbol table.  If the
+ * modname is an empty string, it looks for the symbol in kernel exported
+ * symbol tables.
+ */
+void *get_module_symbol(char *modname, char *symname)
+{
+	struct module *mp;
+	struct internal_symbol *sym;
+	int i;
+
+	for (mp = module_list; mp; mp = mp->next) {
+		if (((modname == NULL) || (strcmp(mp->name, modname) == 0)) &&
+			(mp->state == MOD_RUNNING) &&
+		    (mp->symtab != NULL) &&
+		    (mp->symtab->n_symbols > 0)) {
+			for (i = mp->symtab->n_symbols,
+				sym = mp->symtab->symbol;
+				i > 0; --i, ++sym) {
+
+				if (strcmp(sym->name, symname) == 0) {
+					return sym->addr;
+				}
+			}
+		}
+	}
+	return NULL;
 }
 
 /*