init.h revision a89e112a322d654a73b061b111c9b77b9850eed1 
1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2002-2003 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_i.h"
27
28static inline int
29common_init (struct cursor *c)
30{
31  unw_word_t bspstore;
32  int i, ret;
33
34  c->cfm_loc =		IA64_REG_LOC (c, UNW_IA64_CFM);
35  c->bsp_loc =		IA64_REG_LOC (c, UNW_IA64_AR_BSP);
36  c->bspstore_loc =	IA64_REG_LOC (c, UNW_IA64_AR_BSPSTORE);
37  c->pfs_loc =		IA64_REG_LOC (c, UNW_IA64_AR_PFS);
38  c->rnat_loc =		IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
39  c->ip_loc =		IA64_REG_LOC (c, UNW_IA64_IP);
40  c->pri_unat_loc =	0;	/* no primary UNaT location */
41  c->unat_loc =		IA64_REG_LOC (c, UNW_IA64_AR_UNAT);
42  c->pr_loc =		IA64_REG_LOC (c, UNW_IA64_PR);
43  c->lc_loc =		IA64_REG_LOC (c, UNW_IA64_AR_LC);
44  c->fpsr_loc =		IA64_REG_LOC (c, UNW_IA64_AR_FPSR);
45
46  c->r4_loc = IA64_REG_LOC (c, UNW_IA64_GR + 4);
47  c->r5_loc = IA64_REG_LOC (c, UNW_IA64_GR + 5);
48  c->r6_loc = IA64_REG_LOC (c, UNW_IA64_GR + 6);
49  c->r7_loc = IA64_REG_LOC (c, UNW_IA64_GR + 7);
50
51  /* This says that each NaT bit is stored along with the
52     corresponding preserved register: */
53  c->nat4_loc = IA64_LOC (4, 0);
54  c->nat5_loc = IA64_LOC (5, 0);
55  c->nat6_loc = IA64_LOC (6, 0);
56  c->nat7_loc = IA64_LOC (7, 0);
57
58  c->b1_loc = IA64_REG_LOC (c, UNW_IA64_BR + 1);
59  c->b2_loc = IA64_REG_LOC (c, UNW_IA64_BR + 2);
60  c->b3_loc = IA64_REG_LOC (c, UNW_IA64_BR + 3);
61  c->b4_loc = IA64_REG_LOC (c, UNW_IA64_BR + 4);
62  c->b5_loc = IA64_REG_LOC (c, UNW_IA64_BR + 5);
63
64  c->f2_loc = IA64_FPREG_LOC (c, UNW_IA64_FR + 2);
65  c->f3_loc = IA64_FPREG_LOC (c, UNW_IA64_FR + 3);
66  c->f4_loc = IA64_FPREG_LOC (c, UNW_IA64_FR + 4);
67  c->f5_loc = IA64_FPREG_LOC (c, UNW_IA64_FR + 5);
68  for (i = 16; i <= 31; ++i)
69    c->fr_loc[i - 16] = IA64_FPREG_LOC (c, UNW_IA64_FR + i);
70
71  ret = ia64_get (c, c->ip_loc, &c->ip);
72  if (ret < 0)
73    return ret;
74
75  ret = ia64_get (c, c->cfm_loc, &c->cfm);
76  if (ret < 0)
77    return ret;
78
79  ret = ia64_get (c, c->pr_loc, &c->pr);
80  if (ret < 0)
81    return ret;
82
83  ret = ia64_get (c, IA64_REG_LOC (c, UNW_IA64_GR + 12), &c->sp);
84  if (ret < 0)
85    return ret;
86
87  c->psp = c->sp;
88
89  ret = ia64_get (c, c->bsp_loc, &c->bsp);
90  if (ret < 0)
91    return ret;
92
93  ret = ia64_get (c, c->bspstore_loc, &bspstore);
94  if (ret < 0)
95    return ret;
96
97  c->rbs_curr = c->rbs_left_edge = c->rbs_right_edge = 0;
98  c->rbs_area[0].end = bspstore;
99  c->rbs_area[0].size = ~(unw_word_t) 0;	/* initial guess... */
100  c->rbs_area[0].rnat_loc = IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
101  debug (10, "%s: initial rbs-area: [?-0x%lx), rnat@0x%lx\n", __FUNCTION__,
102	 (long) c->rbs_area[0].end, (long) c->rbs_area[0].rnat_loc);
103
104  c->pi.flags = 0;
105
106#ifdef UNW_LOCAL_ONLY
107  c->eh_args[0] = c->eh_args[1] = c->eh_args[2] = c->eh_args[3] = 0;
108#else
109  for (i = 0; i < 4; ++i)
110    {
111      ret = ia64_get (c, IA64_REG_LOC (c, UNW_IA64_GR + 15 + i),
112		      &c->eh_args[i]);
113      if (ret < 0)
114	{
115	  if (ret == -UNW_EBADREG)
116	    c->eh_args[i] = 0;
117	  else
118	    return ret;
119	}
120    }
121#endif
122  c->sigcontext_loc = 0;
123  c->is_signal_frame = 0;
124
125  c->hint = 0;
126  c->prev_script = 0;
127  c->pi_valid = 0;
128  return 0;
129}
130