2018-02-15 05:54:17 +00:00
|
|
|
/*
|
2020-03-27 09:23:49 +00:00
|
|
|
* Copyright (c) 2018 Ariadne Conill <ariadne@dereferenced.org>
|
2018-02-15 05:54:17 +00:00
|
|
|
*
|
|
|
|
|
* 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.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include "defs.h"
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.globl __start_context;
|
|
|
|
|
__start_context:
|
|
|
|
|
basr %r14, %r7 /* run function pointer (%r7) and return here */
|
|
|
|
|
ltgr %r8, %r8 /* check to see if uc_link (%r8) is null */
|
|
|
|
|
|
|
|
|
|
jz no_linked_context /* if we have no linked context, prepare to exit */
|
|
|
|
|
|
|
|
|
|
lgr %r2, %r8 /* copy the uc_link structure address to %r2 */
|
|
|
|
|
br %r9 /* call setcontext */
|
|
|
|
|
|
|
|
|
|
no_linked_context:
|
|
|
|
|
la %r2, 0 /* return 0 */
|
|
|
|
|
brasl %r14, exit@plt /* call exit */
|
|
|
|
|
|
|
|
|
|
j .+2 /* crash if exit returns */
|
