init.h revision 03db644db300b91bb6270d332cbdf93ff21dab06 
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->pr_loc, &c->pr);
72  if (ret < 0)
73    return ret;
74
75  ret = ia64_get (c, c->ip_loc, &c->ip);
76  if (ret < 0)
77    return ret;
78
79  ret = ia64_get (c, IA64_REG_LOC (c, UNW_IA64_GR + 12), &c->sp);
80  if (ret < 0)
81    return ret;
82
83  c->psp = c->sp;
84
85  ret = ia64_get (c, c->bsp_loc, &c->bsp);
86  if (ret < 0)
87    return ret;
88
89  ret = ia64_get (c, c->bsp_loc, &bspstore);
90  if (ret < 0)
91    return ret;
92
93  c->rbs_curr = c->rbs_wridx = c->rbs_nvalid = 0;
94  c->rbs_area[0].end = bspstore;
95  c->rbs_area[0].size = ~(unw_word_t) 0;	/* initial guess... */
96  c->rbs_area[0].rnat_loc = IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
97  debug (10, "%s: initial rbs-area: [?-0x%lx), rnat @ 0x%lx\n", __FUNCTION__,
98	 (long) c->rbs_area[0].end, (long) c->rbs_area[0].rnat_loc);
99
100  c->pi.flags = 0;
101
102#ifdef UNW_LOCAL_ONLY
103  c->eh_args[0] = c->eh_args[1] = c->eh_args[2] = c->eh_args[3] = 0;
104#else
105  for (i = 0; i < 4; ++i)
106    {
107      ret = ia64_get (c, IA64_REG_LOC (c, UNW_IA64_GR + 15 + i),
108		      &c->eh_args[i]);
109      if (ret < 0)
110	{
111	  if (ret == -UNW_EBADREG)
112	    c->eh_args[i] = 0;
113	  else
114	    return ret;
115	}
116    }
117#endif
118  c->sigcontext_loc = 0;
119  c->is_signal_frame = 0;
120
121  c->hint = 0;
122  c->prev_script = 0;
123  c->pi_valid = 0;
124  return 0;
125}
126