A bit less segfault-y

src/sram.c

@@ -38,7 +38,7 @@ cammy_sram *cammy_sram_open(const char *file) {
     sram->mapped_size = _mapped_size(st.st_size, sram->page_size);
 
     if ((sram->data = mmap(NULL, sram->mapped_size,
-            PROT_READ, MAP_PRIVATE, sram->fd, 0)) == NULL) {
+            PROT_READ | PROT_WRITE, MAP_SHARED, sram->fd, 0)) == NULL) {
         goto error_mmap;
     }
 

src/test.c

@@ -116,7 +116,7 @@ int main(int argc, char **argv) {
         goto error_png_get_data;
     }
 
-    image_copy(&sram->data->frames[frame], buf);
+    image_copy(&sram->data->frames[frame-1], buf);
 
     free(buf);