init.h revision 8a621f78ffd2ba292cd19eadc60cb20cd307f34e 
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 = 0;
98
99  /* There is no way to know the real size of the most recent
100     (right-most) RBS so we'll just assume it to occupy half the
101     address space.  That allows us to have a notion of "above" and
102     "below" even with the wrap-around nature of addressing.  */
103  c->rbs_area[0].end = bspstore;
104  c->rbs_area[0].size = ((unw_word_t) 1) << 63;	/* initial guess... */
105  c->rbs_area[0].rnat_loc = IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
106  debug (10, "%s: initial rbs-area: [?-0x%lx), rnat@0x%lx\n", __FUNCTION__,
107	 (long) c->rbs_area[0].end, (long) c->rbs_area[0].rnat_loc);
108
109  c->pi.flags = 0;
110
111  c->sigcontext_loc = 0;
112  c->is_signal_frame = 0;
113
114  c->hint = 0;
115  c->prev_script = 0;
116  c->eh_valid_mask = 0;
117  c->pi_valid = 0;
118  return 0;
119}
120