2018-02-01 01:26:34 +00:00
|
|
|
/*
|
|
|
|
|
* Copyright (c) 2018 William Pitcock <nenolod@dereferenced.org>
|
|
|
|
|
*
|
|
|
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
|
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
|
|
|
* copyright notice and this permission notice appear in all copies.
|
|
|
|
|
*
|
|
|
|
|
* This software is provided 'as is' and without any warranty, express or
|
|
|
|
|
* implied. In no event shall the authors be liable for any damages arising
|
|
|
|
|
* from the use of this software.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
.globl __start_context;
|
|
|
|
|
__start_context:
|
|
|
|
|
/* get the proper context into position and test for NULL */
|
|
|
|
|
leal (%esp,%ebx,4), %esp
|
|
|
|
|
cmpl $0, (%esp)
|
|
|
|
|
je hosed
|
|
|
|
|
|
|
|
|
|
/* call setcontext to switch to the linked context */
|
2018-02-14 03:37:25 +00:00
|
|
|
call __setcontext@plt
|
2018-02-01 01:26:34 +00:00
|
|
|
movl %eax, (%esp)
|
|
|
|
|
|
|
|
|
|
hosed:
|
|
|
|
|
/* we are returning into a null context, it seems, so maybe we should exit */
|
|
|
|
|
call exit@plt
|
|
|
|
|
|
|
|
|
|
/* something is really hosed, call hlt to force termination */
|
|
|
|
|
hlt
|
