1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2002-2005 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 ALWAYS_INLINE int
29common_init (struct cursor *c, unw_word_t sp, unw_word_t bsp)
30{
31  unw_word_t bspstore, rbs_base;
32  int ret;
33
34  if (c->as->caching_policy != UNW_CACHE_NONE)
35    /* ensure cache doesn't have any stale contents: */
36    ia64_validate_cache (c->as, c->as_arg);
37
38  c->cfm_loc =			IA64_REG_LOC (c, UNW_IA64_CFM);
39  c->loc[IA64_REG_BSP] =	IA64_NULL_LOC;
40  c->loc[IA64_REG_BSPSTORE] =	IA64_REG_LOC (c, UNW_IA64_AR_BSPSTORE);
41  c->loc[IA64_REG_PFS] =	IA64_REG_LOC (c, UNW_IA64_AR_PFS);
42  c->loc[IA64_REG_RNAT] =	IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
43  c->loc[IA64_REG_IP] =		IA64_REG_LOC (c, UNW_IA64_IP);
44  c->loc[IA64_REG_PRI_UNAT_MEM] = IA64_NULL_LOC; /* no primary UNaT location */
45  c->loc[IA64_REG_UNAT] =	IA64_REG_LOC (c, UNW_IA64_AR_UNAT);
46  c->loc[IA64_REG_PR] =		IA64_REG_LOC (c, UNW_IA64_PR);
47  c->loc[IA64_REG_LC] =		IA64_REG_LOC (c, UNW_IA64_AR_LC);
48  c->loc[IA64_REG_FPSR] =	IA64_REG_LOC (c, UNW_IA64_AR_FPSR);
49
50  c->loc[IA64_REG_R4] = IA64_REG_LOC (c, UNW_IA64_GR + 4);
51  c->loc[IA64_REG_R5] = IA64_REG_LOC (c, UNW_IA64_GR + 5);
52  c->loc[IA64_REG_R6] = IA64_REG_LOC (c, UNW_IA64_GR + 6);
53  c->loc[IA64_REG_R7] = IA64_REG_LOC (c, UNW_IA64_GR + 7);
54
55  c->loc[IA64_REG_NAT4] = IA64_REG_NAT_LOC (c, UNW_IA64_NAT + 4, &c->nat_bitnr[0]);
56  c->loc[IA64_REG_NAT5] = IA64_REG_NAT_LOC (c, UNW_IA64_NAT + 5, &c->nat_bitnr[1]);
57  c->loc[IA64_REG_NAT6] = IA64_REG_NAT_LOC (c, UNW_IA64_NAT + 6, &c->nat_bitnr[2]);
58  c->loc[IA64_REG_NAT7] = IA64_REG_NAT_LOC (c, UNW_IA64_NAT + 7, &c->nat_bitnr[3]);
59
60  c->loc[IA64_REG_B1] = IA64_REG_LOC (c, UNW_IA64_BR + 1);
61  c->loc[IA64_REG_B2] = IA64_REG_LOC (c, UNW_IA64_BR + 2);
62  c->loc[IA64_REG_B3] = IA64_REG_LOC (c, UNW_IA64_BR + 3);
63  c->loc[IA64_REG_B4] = IA64_REG_LOC (c, UNW_IA64_BR + 4);
64  c->loc[IA64_REG_B5] = IA64_REG_LOC (c, UNW_IA64_BR + 5);
65
66  c->loc[IA64_REG_F2] = IA64_FPREG_LOC (c, UNW_IA64_FR + 2);
67  c->loc[IA64_REG_F3] = IA64_FPREG_LOC (c, UNW_IA64_FR + 3);
68  c->loc[IA64_REG_F4] = IA64_FPREG_LOC (c, UNW_IA64_FR + 4);
69  c->loc[IA64_REG_F5] = IA64_FPREG_LOC (c, UNW_IA64_FR + 5);
70  c->loc[IA64_REG_F16] = IA64_FPREG_LOC (c, UNW_IA64_FR + 16);
71  c->loc[IA64_REG_F17] = IA64_FPREG_LOC (c, UNW_IA64_FR + 17);
72  c->loc[IA64_REG_F18] = IA64_FPREG_LOC (c, UNW_IA64_FR + 18);
73  c->loc[IA64_REG_F19] = IA64_FPREG_LOC (c, UNW_IA64_FR + 19);
74  c->loc[IA64_REG_F20] = IA64_FPREG_LOC (c, UNW_IA64_FR + 20);
75  c->loc[IA64_REG_F21] = IA64_FPREG_LOC (c, UNW_IA64_FR + 21);
76  c->loc[IA64_REG_F22] = IA64_FPREG_LOC (c, UNW_IA64_FR + 22);
77  c->loc[IA64_REG_F23] = IA64_FPREG_LOC (c, UNW_IA64_FR + 23);
78  c->loc[IA64_REG_F24] = IA64_FPREG_LOC (c, UNW_IA64_FR + 24);
79  c->loc[IA64_REG_F25] = IA64_FPREG_LOC (c, UNW_IA64_FR + 25);
80  c->loc[IA64_REG_F26] = IA64_FPREG_LOC (c, UNW_IA64_FR + 26);
81  c->loc[IA64_REG_F27] = IA64_FPREG_LOC (c, UNW_IA64_FR + 27);
82  c->loc[IA64_REG_F28] = IA64_FPREG_LOC (c, UNW_IA64_FR + 28);
83  c->loc[IA64_REG_F29] = IA64_FPREG_LOC (c, UNW_IA64_FR + 29);
84  c->loc[IA64_REG_F30] = IA64_FPREG_LOC (c, UNW_IA64_FR + 30);
85  c->loc[IA64_REG_F31] = IA64_FPREG_LOC (c, UNW_IA64_FR + 31);
86
87  ret = ia64_get (c, c->loc[IA64_REG_IP], &c->ip);
88  if (ret < 0)
89    return ret;
90
91  ret = ia64_get (c, c->cfm_loc, &c->cfm);
92  if (ret < 0)
93    return ret;
94
95  ret = ia64_get (c, c->loc[IA64_REG_PR], &c->pr);
96  if (ret < 0)
97    return ret;
98
99  c->sp = c->psp = sp;
100  c->bsp = bsp;
101
102  ret = ia64_get (c, c->loc[IA64_REG_BSPSTORE], &bspstore);
103  if (ret < 0)
104    return ret;
105
106  c->rbs_curr = c->rbs_left_edge = 0;
107
108  /* Try to find a base of the register backing-store.  We may default
109     to a reasonable value (e.g., half the address-space down from
110     bspstore).  If the BSPSTORE looks corrupt, we fail. */
111  if ((ret = rbs_get_base (c, bspstore, &rbs_base)) < 0)
112    return ret;
113
114  c->rbs_area[0].end = bspstore;
115  c->rbs_area[0].size = bspstore - rbs_base;
116  c->rbs_area[0].rnat_loc = IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
117  Debug (10, "initial rbs-area: [0x%llx-0x%llx), rnat@%s\n",
118	 (long long) rbs_base, (long long) c->rbs_area[0].end,
119	 ia64_strloc (c->rbs_area[0].rnat_loc));
120
121  c->pi.flags = 0;
122
123  c->sigcontext_addr = 0;
124  c->abi_marker = 0;
125  c->last_abi_marker = 0;
126
127  c->hint = 0;
128  c->prev_script = 0;
129  c->eh_valid_mask = 0;
130  c->pi_valid = 0;
131  return 0;
132}
133