1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2006-2007 IBM
3   Contributed by
4     Corey Ashford cjashfor@us.ibm.com
5     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
6
7This file is part of libunwind.
8
9Permission is hereby granted, free of charge, to any person obtaining
10a copy of this software and associated documentation files (the
11"Software"), to deal in the Software without restriction, including
12without limitation the rights to use, copy, modify, merge, publish,
13distribute, sublicense, and/or sell copies of the Software, and to
14permit persons to whom the Software is furnished to do so, subject to
15the following conditions:
16
17The above copyright notice and this permission notice shall be
18included in all copies or substantial portions of the Software.
19
20THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
27
28#include <stdlib.h>
29
30#include "unwind_i.h"
31
32#ifndef UNW_REMOTE_ONLY
33
34#include <sys/syscall.h>
35
36/* sigreturn() is a no-op on x86_64 glibc.  */
37
38static NORETURN inline long
39my_rt_sigreturn (void *new_sp)
40{
41  /* XXX: empty stub.  */
42  abort ();
43}
44
45HIDDEN inline int
46ppc32_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
47{
48  /* XXX: empty stub.  */
49  return -UNW_EINVAL;
50}
51
52#endif /* !UNW_REMOTE_ONLY */
53
54/* This routine is responsible for copying the register values in
55   cursor C and establishing them as the current machine state. */
56
57static inline int
58establish_machine_state (struct cursor *c)
59{
60  /* XXX: empty stub.  */
61  return 0;
62}
63
64PROTECTED int
65unw_resume (unw_cursor_t *cursor)
66{
67  struct cursor *c = (struct cursor *) cursor;
68  int ret;
69
70  Debug (1, "(cursor=%p)\n", c);
71
72  if ((ret = establish_machine_state (c)) < 0)
73    return ret;
74
75  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
76				     c->dwarf.as_arg);
77}
78