add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/scripts/gcc-plugins/structleak_plugin.c
..
..
@@ -11,11 +11,12 @@
11
11
  * otherwise leak kernel stack to userland if they aren't properly initialized
12
12
  * by later code
13
13
  *
14
- * Homepage: http://pax.grsecurity.net/
14
+ * Homepage: https://pax.grsecurity.net/
15
15
  *
16
16
  * Options:
17
17
  * -fplugin-arg-structleak_plugin-disable
18
18
  * -fplugin-arg-structleak_plugin-verbose
19
+ * -fplugin-arg-structleak_plugin-byref
19
20
  * -fplugin-arg-structleak_plugin-byref-all
20
21
  *
21
22
  * Usage:
..
..
@@ -26,7 +27,6 @@
26
27
  * $ gcc -fplugin=./structleak_plugin.so test.c -O2
27
28
  *
28
29
  * TODO: eliminate redundant initializers
29
- *       increase type coverage
30
30
  */
31
31
 
32
32
 #include "gcc-common.h"
..
..
@@ -37,13 +37,18 @@
37
37
 __visible int plugin_is_GPL_compatible;
38
38
 
39
39
 static struct plugin_info structleak_plugin_info = {
40
-	.version	= "201607271510vanilla",
40
+	.version	= "20190125vanilla",
41
41
 	.help		= "disable\tdo not activate plugin\n"
42
-			   "verbose\tprint all initialized variables\n",
42
+			  "byref\tinit structs passed by reference\n"
43
+			  "byref-all\tinit anything passed by reference\n"
44
+			  "verbose\tprint all initialized variables\n",
43
45
 };
44
46
 
47
+#define BYREF_STRUCT	1
48
+#define BYREF_ALL	2
49
+
45
50
 static bool verbose;
46
-static bool byref_all;
51
+static int byref;
47
52
 
48
53
 static tree handle_user_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs)
49
54
 {
..
..
@@ -118,6 +123,7 @@
118
123
 	gimple_stmt_iterator gsi;
119
124
 	tree initializer;
120
125
 	gimple init_stmt;
126
+	tree type;
121
127
 
122
128
 	/* this is the original entry bb before the forced split */
123
129
 	bb = single_succ(ENTRY_BLOCK_PTR_FOR_FN(cfun));
..
..
@@ -148,11 +154,15 @@
148
154
 	if (verbose)
149
155
 		inform(DECL_SOURCE_LOCATION(var),
150
156
 			"%s variable will be forcibly initialized",
151
-			(byref_all && TREE_ADDRESSABLE(var)) ? "byref"
152
-							     : "userspace");
157
+			(byref && TREE_ADDRESSABLE(var)) ? "byref"
158
+							 : "userspace");
153
159
 
154
160
 	/* build the initializer expression */
155
-	initializer = build_constructor(TREE_TYPE(var), NULL);
161
+	type = TREE_TYPE(var);
162
+	if (AGGREGATE_TYPE_P(type))
163
+		initializer = build_constructor(type, NULL);
164
+	else
165
+		initializer = fold_convert(type, integer_zero_node);
156
166
 
157
167
 	/* build the initializer stmt */
158
168
 	init_stmt = gimple_build_assign(var, initializer);
..
..
@@ -184,13 +194,13 @@
184
194
 		if (!auto_var_in_fn_p(var, current_function_decl))
185
195
 			continue;
186
196
 
187
-		/* only care about structure types */
188
-		if (TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE)
197
+		/* only care about structure types unless byref-all */
198
+		if (byref != BYREF_ALL && TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE)
189
199
 			continue;
190
200
 
191
201
 		/* if the type is of interest, examine the variable */
192
202
 		if (TYPE_USERSPACE(type) ||
193
-		    (byref_all && TREE_ADDRESSABLE(var)))
203
+		    (byref && TREE_ADDRESSABLE(var)))
194
204
 			initialize(var);
195
205
 	}
196
206
 
..
..
@@ -232,8 +242,12 @@
232
242
 			verbose = true;
233
243
 			continue;
234
244
 		}
245
+		if (!strcmp(argv[i].key, "byref")) {
246
+			byref = BYREF_STRUCT;
247
+			continue;
248
+		}
235
249
 		if (!strcmp(argv[i].key, "byref-all")) {
236
-			byref_all = true;
250
+			byref = BYREF_ALL;
237
251
 			continue;
238
252
 		}
239
253
 		error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);