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Update start_process to push pointers to process arguments onto the process thread's stack

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Themis Demetriades
2024-11-04 00:16:04 +00:00
parent 92c681ff02
commit 62d2cb54e5
1 changed files with 5 additions and 4 deletions
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9
src/userprog/process.c
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@@ -123,12 +123,13 @@ start_process (void *file_name_)
struct list_elem *tail = list_tail (&arg_list); struct list_elem *tail = list_tail (&arg_list);
while (e != tail) while (e != tail)
{ {
/* TODO: Push argument pointers to process stack. */ struct arg_elem *arg_elem = list_entry (e, struct arg_elem, elem);
if_.esp -= sizeof (char *);
memcpy (if_.esp, arg_elem->arg, sizeof (char *));
struct list_elem *prev_e = e;
e = list_next (e); e = list_next (e);
free (arg_elem);
free (list_entry (prev_e, struct arg_elem, elem));
} }
/* If load failed, quit. */ /* If load failed, quit. */