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      1 /* libunwind - a platform-independent unwind library
      2    Copyright (C) 2006-2007 IBM
      3    Contributed by
      4      Corey Ashford cjashfor (at) us.ibm.com
      5      Jose Flavio Aguilar Paulino <jflavio (at) br.ibm.com> <joseflavio (at) gmail.com>
      6 
      7 This file is part of libunwind.
      8 
      9 Permission is hereby granted, free of charge, to any person obtaining
     10 a copy of this software and associated documentation files (the
     11 "Software"), to deal in the Software without restriction, including
     12 without limitation the rights to use, copy, modify, merge, publish,
     13 distribute, sublicense, and/or sell copies of the Software, and to
     14 permit persons to whom the Software is furnished to do so, subject to
     15 the following conditions:
     16 
     17 The above copyright notice and this permission notice shall be
     18 included in all copies or substantial portions of the Software.
     19 
     20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     23 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     26 WITH 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 
     38 static NORETURN inline long
     39 my_rt_sigreturn (void *new_sp)
     40 {
     41   /* XXX: empty stub.  */
     42   abort ();
     43 }
     44 
     45 HIDDEN inline int
     46 ppc32_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 
     57 static inline int
     58 establish_machine_state (struct cursor *c)
     59 {
     60   /* XXX: empty stub.  */
     61   return 0;
     62 }
     63 
     64 PROTECTED int
     65 unw_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