Error mem viewer almost finished

error-mem-viewer/include/error-mem-viewer/crc.h

@@ -0,0 +1,10 @@
+#ifndef _CRC_H_
+#define _CRC_H_
+
+#include <stdint.h>
+#include <stddef.h>
+
+uint32_t calculate_stm_crc(uint32_t *data, size_t len);
+
+
+#endif /* _CRC_H_ */

error-mem-viewer/include/error-mem-viewer/err-mem-viewer-address-cell-renderer.h

@@ -1,15 +0,0 @@
-#ifndef _ERR_MEM_VIEWER_ADDRESS_CELL_RENDERER_H_
-#define _ERR_MEM_VIEWER_ADDRESS_CELL_RENDERER_H_
-
-#include <gtk/gtk.h>
-
-G_BEGIN_DECLS
-
-G_DECLARE_FINAL_TYPE(ErrMemViewAddressCellRenderer, err_mem_view_address_cell_renderer, ERR_MEM_VIEW, ADDRESS_CELL_RENDERER, GtkCellRendererText)
-#define ERR_MEM_VIEW_TYPE_ADDRESS_CELL_RENDERER (err_mem_view_address_cell_renderer_get_type())
-
-GtkCellRenderer *err_mem_view_address_cell_renderer_new();
-
-G_END_DECLS
-
-#endif /* _ERR_MEM_VIEWER_ADDRESS_CELL_RENDERER_H_ */

error-mem-viewer/include/error-mem-viewer/err-mem-viewer-hex-cell-renderer.h

@@ -0,0 +1,15 @@
+#ifndef _ERR_MEM_VIEWER_ADDRESS_CELL_RENDERER_H_
+#define _ERR_MEM_VIEWER_ADDRESS_CELL_RENDERER_H_
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+G_DECLARE_FINAL_TYPE(ErrMemViewHexCellRenderer, err_mem_view_hex_cell_renderer, ERR_MEM_VIEW, HEX_CELL_RENDERER, GtkCellRendererText)
+#define ERR_MEM_VIEW_TYPE_HEX_CELL_RENDERER (err_mem_view_address_cell_renderer_get_type())
+
+GtkCellRenderer *err_mem_view_hex_cell_renderer_new();
+
+G_END_DECLS
+
+#endif /* _ERR_MEM_VIEWER_ADDRESS_CELL_RENDERER_H_ */

error-mem-viewer/include/error-mem-viewer/safety-memory-types.h

@@ -0,0 +1,57 @@
+#ifndef _SAFETY_MEM_TYPES_H_
+#define _SAFETY_MEM_TYPES_H_
+
+#include <stdint.h>
+
+/**
+ * @brief Magic number to signal a valid safety memory header.
+ */
+#define SAFETY_MEMORY_MAGIC 0x12AA5CB7
+
+/**
+ * @brief Error memory NOP entry
+ */
+#define SAFETY_MEMORY_NOP_ENTRY 0xC1AA1222
+
+/**
+ * @brief Safety memory header
+ */
+struct safety_memory_header {
+        uint32_t magic;			/**< @brief Magic. Set to @ref SAFETY_MEMORY_MAGIC */
+        uint32_t boot_status_offset;	/**< @brief Offset of the safety_memory_boot_status struct (in 32 bit words)*/
+        uint32_t config_overrides_offset; /**< @brief Offset address of override entries */
+        uint32_t config_overrides_len;	/**< @brief Length of override entries in words */
+        uint32_t err_memory_offset;	/**< @brief Offset of the error memory */
+        uint32_t err_memory_end;	/**< @brief End of the error memory. This points to the word after the error memory, containing the CRC of the whole backup RAM. */
+        uint32_t crc;		/**< @brief  CRC of the header */
+};
+
+struct safety_memory_boot_status {
+        /**
+         * @brief Reboot into the bootloader
+         *
+         * When this flag is set, the controller will load the bootloader to
+         * memory and execute it.
+         */
+        uint32_t reboot_to_bootloader;
+
+        /**
+         * @brief Bootloader has updated the code
+         *
+         * This flag is set, if the firmware ahs been updated successfully
+         */
+        uint32_t code_updated;
+
+        /**
+         * @brief reset_from_panic
+         *
+         * This flag is set, when entering the panic mode.
+         * Because the panic mode is reset by a watchdog reset,
+         * this flag is needed, in order to ensure, that the panic is handled correcly after
+         * the watchdog reset.
+         */
+        uint32_t reset_from_panic;
+};
+
+
+#endif /* _SAFETY_MEM_TYPES_H_ */

error-mem-viewer/resources/main-window.ui

@@ -5,6 +5,70 @@
   <object class="GtkWindow" id="main-window">
     <property name="name">main-window</property>
     <property name="can-focus">False</property>
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="can-focus">False</property>
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="GtkInfoBar" id="info-bar">
+            <property name="visible">True</property>
+            <property name="can-focus">False</property>
+            <property name="message-type">warning</property>
+            <property name="show-close-button">True</property>
+            <property name="revealed">False</property>
+            <signal name="response" handler="info_bar_close_cb" swapped="no"/>
+            <child internal-child="action_area">
+              <object class="GtkButtonBox">
+                <property name="can-focus">False</property>
+                <property name="spacing">6</property>
+                <property name="layout-style">end</property>
+                <child>
+                  <placeholder/>
+                </child>
+                <child>
+                  <placeholder/>
+                </child>
+                <child>
+                  <placeholder/>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">False</property>
+                <property name="position">0</property>
+              </packing>
+            </child>
+            <child internal-child="content_area">
+              <object class="GtkBox">
+                <property name="can-focus">False</property>
+                <property name="spacing">16</property>
+                <child>
+                  <placeholder/>
+                </child>
+                <child>
+                  <placeholder/>
+                </child>
+                <child>
+                  <placeholder/>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">False</property>
+                <property name="position">0</property>
+              </packing>
+            </child>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
         <child>
           <object class="GtkScrolledWindow">
             <property name="visible">True</property>
@@ -20,6 +84,13 @@
               </object>
             </child>
           </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
     </child>
     <child type="titlebar">
       <object class="GtkHeaderBar" id="header-bar">

error-mem-viewer/src/crc.c

@@ -0,0 +1,26 @@
+#include <error-mem-viewer/crc.h>
+
+uint32_t do_crc(uint32_t init, uint32_t data)
+{
+	uint32_t crc = init;
+	uint32_t cnt;
+
+	for(cnt=0; cnt < 32; cnt++)
+	{
+		crc = ((int32_t)(crc ^ data))<0 ? (crc << 1) ^ 0x04C11DB7 : crc << 1;
+		data <<=1;
+	}
+
+	return crc;
+}
+
+uint32_t calculate_stm_crc(uint32_t *data, size_t len)
+{
+	uint32_t crc = ~0U;
+
+	while(len--) {
+		crc = do_crc(crc, *data++);
+	}
+
+	return crc;
+}

error-mem-viewer/src/err-mem-viewer-hex-cell-renderer.c

@@ -1,7 +1,7 @@
-#include <error-mem-viewer/err-mem-viewer-address-cell-renderer.h>
+#include <error-mem-viewer/err-mem-viewer-hex-cell-renderer.h>
 #include <string.h>
 
-struct _ErrMemViewAddressCellRenderer {
+struct _ErrMemViewHexCellRenderer {
 	GtkCellRendererText base;
 };
 
@@ -10,9 +10,9 @@ enum {
 	PROP_COUNT
 };
 
-G_DEFINE_TYPE(ErrMemViewAddressCellRenderer, err_mem_view_address_cell_renderer, GTK_TYPE_CELL_RENDERER_TEXT)
+G_DEFINE_TYPE(ErrMemViewHexCellRenderer, err_mem_view_address_cell_renderer, GTK_TYPE_CELL_RENDERER_TEXT)
 
-static void err_mem_view_address_cell_renderer_init(ErrMemViewAddressCellRenderer *self)
+static void err_mem_view_address_cell_renderer_init(ErrMemViewHexCellRenderer *self)
 {
 	(void)self;
 }
@@ -28,7 +28,7 @@ static void convert_gvalue_uint_to_string(const GValue *in, GValue *out)
 	g_value_init(out, G_TYPE_STRING);
 
 	val = g_value_get_uint(in);
-	snprintf(text, sizeof(text), "0x%08x", val);
+	snprintf(text, sizeof(text), "0x%08X", val);
 	g_value_set_string(out, text);
 }
 
@@ -64,7 +64,7 @@ static void err_mem_view_address_cell_renderer_get_property(GObject      *object
 
 static GParamSpec *properties[PROP_COUNT];
 
-void err_mem_view_address_cell_renderer_class_init(ErrMemViewAddressCellRendererClass *klass)
+void err_mem_view_address_cell_renderer_class_init(ErrMemViewHexCellRendererClass *klass)
 {
 	GObjectClass *oclass = G_OBJECT_CLASS(klass);
 
@@ -75,7 +75,7 @@ void err_mem_view_address_cell_renderer_class_init(ErrMemViewAddressCellRenderer
 	g_object_class_install_properties(oclass, PROP_COUNT, properties);
 }
 
-GtkCellRenderer *err_mem_view_address_cell_renderer_new()
+GtkCellRenderer *err_mem_view_hex_cell_renderer_new()
 {
-	return GTK_CELL_RENDERER(g_object_new(ERR_MEM_VIEW_TYPE_ADDRESS_CELL_RENDERER, NULL));
+	return GTK_CELL_RENDERER(g_object_new(ERR_MEM_VIEW_TYPE_HEX_CELL_RENDERER, NULL));
 }

error-mem-viewer/src/main.c

@@ -3,15 +3,18 @@
 #include <stdint.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <sys/mman.h>
 #include <fcntl.h>
-
+#include <stdarg.h>
-#include <error-mem-viewer/err-mem-viewer-address-cell-renderer.h>
+#include <stdbool.h>
+#include <error-mem-viewer/err-mem-viewer-hex-cell-renderer.h>
+#include <error-mem-viewer/safety-memory-types.h>
+#include <error-mem-viewer/crc.h>
 
 enum memory_view_columns {
 	MEM_VIEW_COL_ADDRESS = 0,
 	MEM_VIEW_COL_DATA,
 	MEM_VIEW_COL_INTERPRETATION,
+	MEM_VIEW_COLOR,
 	MEM_VIEW_COLUMN_COUNT
 };
 
@@ -19,87 +22,427 @@ struct application_data {
 	GtkWidget *borrowed_main_window;
 	GtkTreeView *borrowed_tree_view;
 	GtkHeaderBar *borrowed_header_bar;
+	GtkInfoBar *borrowed_info_bar;
 	const char *error_memory_data;
 	size_t file_size;
 };
 
-static void tree_view_show_error_memory(GtkTreeView *tree_view, const char *memory, size_t len)
+enum entry_state {
+	ENTRY_STATE_VALID = 0,
+	ENTRY_STATE_INVALID,
+	ENTRY_STATE_NOT_PARSED,
+	ENTRY_STATE_BLOCK
+};
+
+static void append_data(GtkTreeStore *store, GtkTreeIter *parent, GtkTreeIter *iter, GString *interpretation, enum entry_state state, uint32_t addr, uint32_t val)
 {
-	GtkListStore *store;
+	const GdkRGBA invalid_color = {
-	GtkTreeIter _iter;
+		.red = 1.0,
-	GtkTreeIter *iter = &_iter;
+		.alpha = 1.0,
+		.green = 0.0,
+		.blue = 0.0,
+	};
 
-	store = GTK_LIST_STORE(gtk_tree_view_get_model(tree_view));
+	const GdkRGBA valid_color = {
-	if (store) {
+		.red = 0.0,
-		for (unsigned int i = 0; i < 0xFFFF; i+=4) {
+		.alpha = 1.0,
-			gtk_list_store_append(store, iter);
+		.green = 1.0,
-			gtk_list_store_set(store, iter, MEM_VIEW_COL_ADDRESS, i, MEM_VIEW_COL_INTERPRETATION, "Test", MEM_VIEW_COL_DATA, i % 12, -1);
+		.blue = 0.0,
-		}
+	};
+
+	const GdkRGBA warn_color = {
+		.red = 1.0,
+		.alpha = 1.0,
+		.green = 1.0,
+		.blue = 0.0,
+	};
+
+	const GdkRGBA block_color = {
+		.red = 1.0,
+		.alpha = 1.0,
+		.green = 0.3,
+		.blue = 0.5,
+	};
+
+	const GdkRGBA *col;
+
+	switch (state) {
+	case ENTRY_STATE_VALID:
+		col = &valid_color;
+		break;
+	case ENTRY_STATE_NOT_PARSED:
+		col = &warn_color;
+		break;
+	case ENTRY_STATE_BLOCK:
+		col = &block_color;
+		break;
+	case ENTRY_STATE_INVALID:
+	default:
+		col = &invalid_color;
+		break;
 	}
 
+	gtk_tree_store_append(store, iter, parent);
+	gtk_tree_store_set(store, iter, MEM_VIEW_COL_ADDRESS, addr, MEM_VIEW_COLOR, col, MEM_VIEW_COL_INTERPRETATION, (interpretation ? interpretation->str : ""), MEM_VIEW_COL_DATA, val, -1);
+	if (interpretation)
+		g_string_free(interpretation, TRUE);
+}
+
+static void info_bar_show_message(GtkInfoBar *info_bar, GtkMessageType type, const char *format, ...)
+{
+	GString *string;
+	va_list args;
+	GtkWidget *content;
+	GList *children, *iter;
+	GtkWidget *label;
+
+	va_start(args, format);
+	string = g_string_new(NULL);
+
+	g_string_vprintf(string, format, args);
+	va_end(args);
+
+	content = gtk_info_bar_get_content_area(info_bar);
+	children = gtk_container_get_children(GTK_CONTAINER(content));
+	for (iter = children; iter; iter = g_list_next(iter))
+		gtk_widget_destroy(GTK_WIDGET(iter->data));
+	g_list_free(children);
+
+	label = gtk_label_new(string->str);
+	gtk_container_add(GTK_CONTAINER(content), label);
+	gtk_widget_show(label);
+	gtk_info_bar_set_message_type(info_bar, type);
+	gtk_widget_show(GTK_WIDGET(info_bar));
+	gtk_info_bar_set_revealed(info_bar, TRUE);
+
+	g_string_free(string, TRUE);
+}
+
+static bool check_err_mem_header(struct safety_memory_header *header, uint32_t *expected)
+{
+	uint32_t crc;
+
+	crc = calculate_stm_crc((uint32_t *)header, sizeof(*header) / sizeof(uint32_t) - 1);
+	if (expected)
+		*expected = crc;
+	if (crc == header->crc)
+		return true;
+	else
+		return false;
+}
+
+static GString *new_string_printf(const char *fmt, ...)
+{
+	GString *string;
+	va_list args;
+
+	va_start(args, fmt);
+
+	string = g_string_new(NULL);
+	g_string_vprintf(string, fmt, args);
+
+	va_end(args);
+
+	return string;
+}
+
+static void show_error_memory(GtkTreeView *tree_view, const unsigned char *memory, size_t len)
+{
+	GtkTreeStore *store;
+	GtkTreeIter iter;
+	GtkTreeIter iter2;
+	GtkTreeIter *parent_iter, *child_iter;
+	enum entry_state state;
+	GString *interpret;
+	bool valid;
+	bool analyze_further = true;
+	struct safety_memory_header header;
+	unsigned int i;
+	uint32_t dat, expected_value;
+
+	store = GTK_TREE_STORE(gtk_tree_view_get_model(tree_view));
+	gtk_tree_store_clear(store);
+
+	for (i = 0; i < len / 4; i++) {
+		valid = false;
+		interpret = NULL;
+		dat = memory[i*4];
+		dat |= ((uint32_t)memory[i*4+1]) << 8;
+		dat |= ((uint32_t)memory[i*4+2]) << 16;
+		dat |= ((uint32_t)memory[i*4+3]) << 24;
+
+		state = ENTRY_STATE_NOT_PARSED;
+
+		if (!analyze_further) {
+			interpret = g_string_new("Not analyzed due to previous error");
+			state = ENTRY_STATE_NOT_PARSED;
+			parent_iter = NULL;
+			child_iter = &iter;
+			goto print;
+		}
+		/* Parse header */
+		switch (i) {
+		case 0: /* Magic */
+			parent_iter = NULL;
+			child_iter = &iter;
+			append_data(store, parent_iter, child_iter, new_string_printf("Header"), ENTRY_STATE_BLOCK, i * 4, dat);
+			parent_iter = child_iter;
+			child_iter = &iter2;
+			if (dat == SAFETY_MEMORY_MAGIC) {
+				valid = true;
+				interpret = g_string_new("Valid Header Magic");
+			} else {
+				interpret = g_string_new("Invalid Header Magic");
+				analyze_further = false;
+			}
+			header.magic = dat;
+			break;
+		case 1:
+			header.boot_status_offset = dat;
+
+			valid = true;
+			interpret = new_string_printf("Boot status offset addr: %u", dat);
+			break;
+		case 2:
+			header.config_overrides_offset = dat;
+			interpret = new_string_printf("Config override offset addr: %u", dat);
+			valid = true;
+			break;
+		case 3:
+			header.config_overrides_len = dat;
+			interpret = new_string_printf("Config override length: %u", dat);
+			valid = true;
+			break;
+		case 4:
+			header.err_memory_offset = dat;
+			interpret = new_string_printf("Error memory offset addr: %u", dat);
+			valid = true;
+			break;
+		case 5:
+			header.err_memory_end = dat;
+			interpret = new_string_printf("Error memory end ptr: %u", dat);
+			valid = true;
+			break;
+		case 6:
+			header.crc = dat;
+			valid = check_err_mem_header(&header, &expected_value);
+			if (valid) {
+				interpret = new_string_printf("Header CRC: 0x%08X", dat);
+			} else {
+
+				interpret = new_string_printf("Invalid CRC: 0x%08X | Expected: 0x%08X", dat, expected_value);
+				analyze_further = false;
+			}
+			break;
+		}
+		if (i <= 6) {
+			state = ENTRY_STATE_INVALID;
+			goto print;
+		}
+
+		/* Check if we're in the boot status structure */
+		if (i >= header.boot_status_offset && i < header.boot_status_offset + sizeof(struct safety_memory_boot_status) / 4) {
+			if (i == header.boot_status_offset) {
+				/* First entry of boot status struct */
+				parent_iter = NULL;
+				child_iter = &iter;
+				interpret = new_string_printf("Boot Status Struct");
+				append_data(store, parent_iter, child_iter, interpret, ENTRY_STATE_BLOCK, i * 4, dat);
+				parent_iter = &iter;
+				child_iter = &iter2;
+				interpret = NULL;
+			}
+			switch (i - header.boot_status_offset) {
+			case 0:
+				interpret = new_string_printf("%s into bootloader", (dat ? "Boot" : "Do not boot"));
+				valid = true;
+				break;
+			case 1:
+				interpret = new_string_printf("Code %s been updated", (dat ? "has" : "hasn't"));
+				valid = true;
+				break;
+			case 2:
+				interpret = new_string_printf("Panic %s", (dat ? "occured" : "did not occur"));
+				valid = true;
+				break;
+			default:
+				valid = false;
+				interpret = new_string_printf("Value undefined!");
+				break;
+			}
+			state = ENTRY_STATE_INVALID;
+			goto print;
+		}
+
+		if (i >= header.config_overrides_offset && i < (header.config_overrides_offset + header.config_overrides_len)) {
+			if (i == header.config_overrides_offset) {
+				parent_iter  = NULL;
+				child_iter = &iter;
+				append_data(store, parent_iter, child_iter,
+					    new_string_printf("Config Overrides"),
+					    ENTRY_STATE_BLOCK, i * 4, dat);
+				parent_iter = child_iter;
+				child_iter = &iter2;
+			}
+
+			interpret = new_string_printf("Config Overrides not yet implemented");
+			valid = true;
+			state = ENTRY_STATE_INVALID;
+			goto print;
+		}
+
+		if (i >= header.err_memory_offset && i < header.err_memory_end) {
+			if (i == header.err_memory_offset) {
+				parent_iter  = NULL;
+				child_iter = &iter;
+				append_data(store, parent_iter, child_iter,
+					    new_string_printf("Error Memory (length: %d)", header.err_memory_end - header.err_memory_offset),
+					    ENTRY_STATE_BLOCK, i * 4, dat);
+				parent_iter = child_iter;
+				child_iter = &iter2;
+			}
+
+			switch (dat) {
+			case SAFETY_MEMORY_NOP_ENTRY:
+				valid = true;
+				interpret = new_string_printf("Error Memory NOP");
+				break;
+			default:
+				if ((dat & 0xFFU) == 0x51U) {
+					valid = true;
+					interpret = new_string_printf("Err memory Entry");
+				} else
+					interpret = new_string_printf("Invalid error memory entry");
+				break;
+			}
+			state = ENTRY_STATE_INVALID;
+			goto print;
+		}
+
+		if (i == header.err_memory_end) {
+			expected_value = calculate_stm_crc((uint32_t *)memory, header.err_memory_end);
+			if (expected_value == dat) {
+				interpret = new_string_printf("Valid Memory CRC");
+				valid = true;
+			} else {
+				interpret = new_string_printf("Invalid CRC. Expected: 0x%08X", expected_value);
+			}
+			state = ENTRY_STATE_INVALID;
+			parent_iter = NULL;
+			child_iter = &iter;
+			goto print;
+		}
+
+		parent_iter = NULL;
+		child_iter = &iter;
+print:
+		if (state != ENTRY_STATE_NOT_PARSED) {
+			state = (valid ? ENTRY_STATE_VALID : ENTRY_STATE_INVALID);
+		}
+		append_data(store, parent_iter, child_iter, interpret, state, i * 4, dat);
+	}
+
+
+	if (!store)
+		return;
 }
 
 void setup_tree_view(GtkTreeView *tree_view)
 {
-	GtkListStore *list_store;
+	GtkTreeStore *tree_store;
 	GtkCellRenderer *string_renderer;
 	GtkCellRenderer *hex_renderer;
 	GtkTreeViewColumn *column;
 
 	g_return_if_fail(GTK_IS_TREE_VIEW(tree_view));
 
-	list_store = gtk_list_store_new(MEM_VIEW_COLUMN_COUNT, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_STRING);
+	tree_store = gtk_tree_store_new(MEM_VIEW_COLUMN_COUNT, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_STRING, GDK_TYPE_RGBA);
-	gtk_tree_view_set_model(tree_view, GTK_TREE_MODEL(list_store));
+	gtk_tree_view_set_model(tree_view, GTK_TREE_MODEL(tree_store));
 
 	string_renderer = gtk_cell_renderer_text_new();
-	hex_renderer = err_mem_view_address_cell_renderer_new();
+	hex_renderer = err_mem_view_hex_cell_renderer_new();
 
-	column = gtk_tree_view_column_new_with_attributes("Address", hex_renderer, "hex-num", MEM_VIEW_COL_ADDRESS, NULL);
+	column = gtk_tree_view_column_new_with_attributes("Address", hex_renderer, "hex-num", MEM_VIEW_COL_ADDRESS, "foreground-rgba", MEM_VIEW_COLOR, NULL);
 	gtk_tree_view_append_column(tree_view, column);
-	column = gtk_tree_view_column_new_with_attributes("Data", hex_renderer, "hex-num", MEM_VIEW_COL_DATA, NULL);
+	column = gtk_tree_view_column_new_with_attributes("Data", hex_renderer, "hex-num", MEM_VIEW_COL_DATA, "foreground-rgba", MEM_VIEW_COLOR, NULL);
 	gtk_tree_view_append_column(tree_view, column);
-	column = gtk_tree_view_column_new_with_attributes("Interpretation", string_renderer, "text", MEM_VIEW_COL_INTERPRETATION, NULL);
+	column = gtk_tree_view_column_new_with_attributes("Interpretation", string_renderer, "text", MEM_VIEW_COL_INTERPRETATION, "foreground-rgba", MEM_VIEW_COLOR, NULL);
 	gtk_tree_view_append_column(tree_view, column);
 }
 
-static int64_t get_file_size(int file)
+static ptrdiff_t get_file_size(const char *filename)
 {
-	off_t size;
+	struct stat file_stat;
+	int res;
+	ptrdiff_t size;
 
+	res = stat(filename, &file_stat);
 
-	if (!file)
+	if (res)
-		return -1L;
+		size = -1UL;
+	else
+		size = (ptrdiff_t)file_stat.st_size;
 
-	size = lseek(file, 0, SEEK_END);
+	return size;
-	if (size == (off_t)-1)
-		return -1;
 
-
-	return (int64_t)size;
 }
 
-static const char *map_file_to_memory(const char *name, size_t *detected_size)
+/**
+ * @brief Loads a file to memory and decodes it using base64
+ * @param name Filename
+ * @param detected_size detected Size of the ouput generated
+ * @return Buffer of decoded data with size \p detected_size, NULL in case of an error.
+ * @note Return buffer is allocated on heap. Use free() to free the memory.
+ */
+static char *load_file_to_memory(const char *name, size_t *detected_size)
 {
-	const char *ret = NULL;
+	ptrdiff_t size;
-	int file;
+	FILE *f;
-	int64_t file_size;
+	char *ret = NULL;
+	size_t read_bytes;
+	gsize decoded_size;
 
-	file = open(name, O_RDONLY);
+	size = get_file_size(name);
-	if (file < 0)
+	if (size <= 0)
 		goto exit;
 
-	file_size = get_file_size(file);
+	f = fopen(name, "rb");
-	if (file_size < 0)
+	ret = (char *)malloc(size + 1);
-		goto exit;
+	if (!ret)
+		goto exit_close_file;
+
+	read_bytes = fread(ret, 1UL, (size_t)size, f);
+	if (read_bytes != (size_t)size) {
+		free(ret);
+		ret = NULL;
+		goto exit_close_file;
+	}
+
+	ret[size] = '\0';
+
+	g_base64_decode_inplace(ret, &decoded_size);
+	if (decoded_size == 0) {
+		free(ret);
+		ret = NULL;
+		goto exit_close_file;
+	}
 
 	if (detected_size)
-		*detected_size = (size_t)file_size;
+		*detected_size = (size_t)decoded_size;
-
+exit_close_file:
-	ret = (const char *)mmap(NULL, (size_t)file_size, PROT_READ, MAP_SHARED, file, (off_t)0L);
+	fclose(f);
 exit:
 	return ret;
 }
 
+G_MODULE_EXPORT
+void info_bar_close_cb(GtkInfoBar *info_bar, gpointer user_data)
+{
+	(void)user_data;
+
+	gtk_info_bar_set_revealed(info_bar, FALSE);
+}
+
 G_MODULE_EXPORT
 void open_button_clicked_cb(GtkButton *button, gpointer *user_data)
 {
@@ -109,6 +452,7 @@ void open_button_clicked_cb(GtkButton *button, gpointer *user_data)
 	gint res;
 	gchar *filename;
 
+
 	dialog = GTK_DIALOG(gtk_file_chooser_dialog_new("Open File", GTK_WINDOW(data->borrowed_main_window),
 							GTK_FILE_CHOOSER_ACTION_OPEN,
 							"Cancel", GTK_RESPONSE_CANCEL,
@@ -117,7 +461,9 @@ void open_button_clicked_cb(GtkButton *button, gpointer *user_data)
 	res = gtk_dialog_run(dialog);
 	if (res == GTK_RESPONSE_ACCEPT) {
 		filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
-		data->error_memory_data = map_file_to_memory(filename, &data->file_size);
+		if (data->error_memory_data)
+			free((void *)data->error_memory_data);
+		data->error_memory_data = load_file_to_memory(filename, &data->file_size);
 		if (!data->error_memory_data) {
 			g_warning("File could not be loaded");
 			g_free(filename);
@@ -126,9 +472,19 @@ void open_button_clicked_cb(GtkButton *button, gpointer *user_data)
 
 		gtk_header_bar_set_subtitle(data->borrowed_header_bar, filename);
 		g_free(filename);
+	} else {
+		goto ret_destroy_dialog;
 	}
 
-	tree_view_show_error_memory(data->borrowed_tree_view, data->error_memory_data, data->file_size);
+	if (data->file_size % 4 || data->file_size == 0) {
+		free((void *)data->error_memory_data);
+		data->error_memory_data = NULL;
+		info_bar_show_message(data->borrowed_info_bar, GTK_MESSAGE_WARNING,
+				      "Data must be base64 encoded and must contain full 32 bit words of data.");
+		goto ret_destroy_dialog;
+	}
+
+	show_error_memory(data->borrowed_tree_view, (const unsigned char *)data->error_memory_data, data->file_size);
 
 ret_destroy_dialog:
 	gtk_widget_destroy(GTK_WIDGET(dialog));
@@ -136,21 +492,21 @@ ret_destroy_dialog:
 
 static void app_activated(GApplication *app, gpointer user_data)
 {
-	(void)user_data;
+	struct application_data *data = (struct application_data *)user_data;
 	GtkBuilder *builder;
 	GtkWindow *main_window;
-	static struct application_data data;
 
 	builder = gtk_builder_new_from_resource("/gui/main");
 	main_window = GTK_WINDOW(gtk_builder_get_object(builder, "main-window"));
-	data.borrowed_main_window = GTK_WIDGET(main_window);
+	data->borrowed_main_window = GTK_WIDGET(main_window);
-	data.error_memory_data = NULL;
+	data->error_memory_data = NULL;
-	data.borrowed_tree_view = GTK_TREE_VIEW(gtk_builder_get_object(builder, "error-mem-tree-view"));
+	data->borrowed_tree_view = GTK_TREE_VIEW(gtk_builder_get_object(builder, "error-mem-tree-view"));
-	data.borrowed_header_bar = GTK_HEADER_BAR(gtk_builder_get_object(builder, "header-bar"));
+	data->borrowed_header_bar = GTK_HEADER_BAR(gtk_builder_get_object(builder, "header-bar"));
+	data->borrowed_info_bar = GTK_INFO_BAR(gtk_builder_get_object(builder, "info-bar"));
 
-	setup_tree_view(data.borrowed_tree_view);
+	setup_tree_view(data->borrowed_tree_view);
 
-	gtk_builder_connect_signals(builder, &data);
+	gtk_builder_connect_signals(builder, data);
 	g_object_unref(builder);
 	gtk_application_add_window(GTK_APPLICATION(app), main_window);
 	gtk_widget_show(GTK_WIDGET(main_window));
@@ -160,14 +516,17 @@ static int start_gui(int argc, char **argv)
 {
 	int ret = 0;
 	GtkApplication *g_app;
+	static struct application_data data;
 
 	/* Create a new G application which will start a completely new process for each call to the program (NON_UNIQUE) instead
 	 * of creating an additional window in the same process
 	 */
 	g_app = gtk_application_new("de.shimatta.reflow.error-mem-viewer", G_APPLICATION_NON_UNIQUE);
-	g_signal_connect(g_app, "activate", G_CALLBACK(app_activated), NULL);
+	g_signal_connect(g_app, "activate", G_CALLBACK(app_activated), &data);
 	ret = g_application_run(G_APPLICATION(g_app), argc, argv);
 	g_object_unref(g_app);
+	if (data.error_memory_data)
+		free((void *)data.error_memory_data);
 
 	return ret;
 }