1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2003-2004 Hewlett-Packard Co
3	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4
5This file is part of libunwind.
6
7Permission is hereby granted, free of charge, to any person obtaining
8a copy of this software and associated documentation files (the
9"Software"), to deal in the Software without restriction, including
10without limitation the rights to use, copy, modify, merge, publish,
11distribute, sublicense, and/or sell copies of the Software, and to
12permit persons to whom the Software is furnished to do so, subject to
13the following conditions:
14
15The above copyright notice and this permission notice shall be
16included in all copies or substantial portions of the Software.
17
18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
25
26#include "unwind-internal.h"
27
28/* ANDROID support update. */
29PROTECTED _Unwind_Reason_Code
30_Unwind_RaiseException (struct _Unwind_Exception *exception_object)
31{
32  uint64_t exception_class = exception_object->exception_class;
33  _Unwind_Personality_Fn personality;
34  struct _Unwind_Context context;
35  _Unwind_Reason_Code reason;
36  unw_proc_info_t pi;
37  unw_context_t uc;
38  unw_word_t ip;
39  int ret;
40  int destroy_map = 1;
41
42  Debug (1, "(exception_object=%p)\n", exception_object);
43
44  unw_map_local_create ();
45
46  if (_Unwind_InitContext (&context, &uc) < 0)
47    {
48      ret = _URC_FATAL_PHASE1_ERROR;
49      goto done;
50    }
51
52  /* Phase 1 (search phase) */
53
54  while (1)
55    {
56      if (unw_step (&context.cursor) <= 0)
57	{
58	  Debug (1, "no handler found\n");
59	  ret = _URC_END_OF_STACK;
60	  goto done;
61	}
62
63      if (unw_get_proc_info (&context.cursor, &pi) < 0)
64        {
65	  ret = _URC_FATAL_PHASE1_ERROR;
66	  goto done;
67        }
68
69      personality = (_Unwind_Personality_Fn) (uintptr_t) pi.handler;
70      if (personality)
71	{
72	  reason = (*personality) (_U_VERSION, _UA_SEARCH_PHASE,
73				   exception_class, exception_object,
74				   &context);
75	  if (reason != _URC_CONTINUE_UNWIND)
76	    {
77	      if (reason == _URC_HANDLER_FOUND)
78		break;
79	      else
80		{
81		  Debug (1, "personality returned %d\n", reason);
82		  ret = _URC_FATAL_PHASE1_ERROR;
83		  goto done;
84		}
85	    }
86	}
87    }
88
89  /* Exceptions are associated with IP-ranges.  If a given exception
90     is handled at a particular IP, it will _always_ be handled at
91     that IP.  If this weren't true, we'd have to track the tuple
92     (IP,SP,BSP) to uniquely identify the stack frame that's handling
93     the exception.  */
94  if (unw_get_reg (&context.cursor, UNW_REG_IP, &ip) < 0)
95    ret = _URC_FATAL_PHASE1_ERROR;
96  else
97    {
98      exception_object->private_1 = 0;	/* clear "stop" pointer */
99      exception_object->private_2 = ip;	/* save frame marker */
100
101      Debug (1, "found handler for IP=%lx; entering cleanup phase\n", (long) ip);
102
103      /* Reset the cursor to the first frame: */
104      if (unw_init_local (&context.cursor, &uc) < 0)
105        ret = _URC_FATAL_PHASE1_ERROR;
106      else
107        ret = _Unwind_Phase2 (exception_object, &context, &destroy_map);
108    }
109
110done:
111  if (destroy_map)
112    unw_map_local_destroy ();
113
114  return ret;
115}
116/* End ANDROID support. */
117
118_Unwind_Reason_Code
119__libunwind_Unwind_RaiseException (struct _Unwind_Exception *)
120     ALIAS (_Unwind_RaiseException);
121