vm: implement direct read/write/copy access to vm-object memory

kernel/bsp.c

@@ -102,7 +102,6 @@ static kern_status_t map_executable(
 		5,
 		bsp->bsp_trailer.bsp_data_size,
 		VM_PROT_READ | VM_PROT_WRITE | VM_PROT_USER);
-	/* TODO copy .data from executable to memory */
 	if (!data) {
 		return KERN_NO_MEMORY;
 	}
@@ -115,6 +114,19 @@ static kern_status_t map_executable(
 	off_t text_voffset = bsp->bsp_trailer.bsp_text_vaddr;
 	off_t data_voffset = bsp->bsp_trailer.bsp_data_vaddr;
 
+#if 0
+	size_t tmp = 0;
+	status = vm_object_copy(
+		data,
+		0,
+		bsp->bsp_vmo,
+		bsp->bsp_trailer.bsp_data_faddr,
+		bsp->bsp_trailer.bsp_data_size,
+		&tmp);
+
+	tracek("read %zuB of data from executable", tmp);
+#endif
+
 	tracek("text_foffset=%06llx, data_foffset=%06llx",
 	       text_foffset,
 	       data_foffset);