approve getprop

main.c

@@ -202,26 +202,15 @@ int is_offset_valid(char * fdt, int offset, int len)
 
 #define WINDOW_SIZE 512
 
-static int fdt_dump_node_data(const char *outname, const char *filename, int offset)
+static int fdt_node_get_prop(char * filename, char * fdt, char * strings, int offset, const char * prop_name, int * data_offset, int * data_len)
 {
-	char *buf = malloc(WINDOW_SIZE);
-	int readed = firmware_fdt_read_chunk(filename, buf, WINDOW_SIZE, 0);
-	if (readed <= 0)
-		return -1;
-	char *fdt = buf;
-
-	buf = malloc(WINDOW_SIZE);
-	readed = firmware_fdt_read_chunk(filename, buf, WINDOW_SIZE, offset);
-	if (readed <= 0)
-		return -1;
-
-	char * strings = malloc(WINDOW_SIZE);
-	readed = firmware_fdt_read_chunk(filename, strings, WINDOW_SIZE, fdt_off_dt_strings(fdt));
+	char * buf = malloc(WINDOW_SIZE);
+	int readed = firmware_fdt_read_chunk(filename, buf, WINDOW_SIZE, offset);
 	if (readed <= 0)
 		return -1;
 
-	int data_offset = 0;
-	int data_len = 0;
+	*data_offset = 0;
+	*data_len = 0;
 	do {
 		int nextoffset = guess_next_tag(fdt, offset, buf);
 		readed = firmware_fdt_read_chunk(filename, buf, WINDOW_SIZE, nextoffset);
@@ -244,15 +233,25 @@ static int fdt_dump_node_data(const char *outname, const char *filename, int off
 
 			if (strcmp(name, "data"))
 				continue;
-			data_offset = prop->data - (char *)prop + offset;
-			data_len = fdt32_to_cpu(prop->len);
+			*data_offset = prop->data - (char *)prop + offset;
+			*data_len = fdt32_to_cpu(prop->len);
 			debug("Property \"data\" at offset %x len %d\n", data_offset, data_len);
-			break;
+			return 0;
 		}
 	} while (FDT_END != fdt32_to_cpu(*(int *)(fdt_offset_ptr_(fdt, buf, 0))));
 
+	return -1;
+}
+
+static int fdt_dump_node_data(char * fdt, char * strings, const char *outname, const char *filename, int offset)
+{
+	int data_offset = 0;
+	int data_len = 0;
+	if (fdt_node_get_prop(filename, fdt, strings, offset, "data", &data_offset, &data_len))
+		return -1;
+
 	char * data = malloc(data_len);
-	readed = firmware_fdt_read_chunk(filename, data, data_len,
+	int readed = firmware_fdt_read_chunk(filename, data, data_len,
 	                                 fdt_off_dt_struct(fdt) + data_offset);
 	if (readed <= 0)
 		return -1;
@@ -346,12 +345,17 @@ int b()
 
 	debug("Yay\n");
 
+	char * strings = malloc(WINDOW_SIZE);
+	readed = firmware_fdt_read_chunk(filename, strings, WINDOW_SIZE, fdt_off_dt_strings(fdt));
+	if (readed <= 0)
+		return -1;
+
 	for (int i = 0; i < sizeof(node_offsets) / sizeof(*node_offsets); i++)
 	{
 		printf("%s offset: %x\n", node_offsets[i].name, node_offsets[i].offset);
 		readed = firmware_fdt_read_chunk(filename, buf, WINDOW_SIZE,
 		                                 node_offsets[i].offset);
-		int writed = fdt_dump_node_data(node_offsets[i].name, filename, node_offsets[i].offset);
+		int writed = fdt_dump_node_data(fdt, strings, node_offsets[i].name, filename, node_offsets[i].offset);
 		printf("Written %d bytes\n", writed);
 	}