1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2006-2007 IBM
3   Contributed by
4     Corey Ashford <cjashfor@us.ibm.com>
5     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
6
7This file is part of libunwind.
8
9Permission is hereby granted, free of charge, to any person obtaining
10a copy of this software and associated documentation files (the
11"Software"), to deal in the Software without restriction, including
12without limitation the rights to use, copy, modify, merge, publish,
13distribute, sublicense, and/or sell copies of the Software, and to
14permit persons to whom the Software is furnished to do so, subject to
15the following conditions:
16
17The above copyright notice and this permission notice shall be
18included in all copies or substantial portions of the Software.
19
20THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
27
28#include "unwind_i.h"
29
30HIDDEN int
31tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
32                 int write)
33{
34  struct dwarf_loc loc;
35
36  switch (reg)
37    {
38    case UNW_PPC64_R0:
39    case UNW_PPC64_R2:
40    case UNW_PPC64_R3:
41    case UNW_PPC64_R4:
42    case UNW_PPC64_R5:
43    case UNW_PPC64_R6:
44    case UNW_PPC64_R7:
45    case UNW_PPC64_R8:
46    case UNW_PPC64_R9:
47    case UNW_PPC64_R10:
48    case UNW_PPC64_R11:
49    case UNW_PPC64_R12:
50    case UNW_PPC64_R13:
51    case UNW_PPC64_R14:
52    case UNW_PPC64_R15:
53    case UNW_PPC64_R16:
54    case UNW_PPC64_R17:
55    case UNW_PPC64_R18:
56    case UNW_PPC64_R19:
57    case UNW_PPC64_R20:
58    case UNW_PPC64_R21:
59    case UNW_PPC64_R22:
60    case UNW_PPC64_R23:
61    case UNW_PPC64_R24:
62    case UNW_PPC64_R25:
63    case UNW_PPC64_R26:
64    case UNW_PPC64_R27:
65    case UNW_PPC64_R28:
66    case UNW_PPC64_R29:
67    case UNW_PPC64_R30:
68    case UNW_PPC64_R31:
69    case UNW_PPC64_LR:
70    case UNW_PPC64_CTR:
71    case UNW_PPC64_CR0:
72    case UNW_PPC64_CR1:
73    case UNW_PPC64_CR2:
74    case UNW_PPC64_CR3:
75    case UNW_PPC64_CR4:
76    case UNW_PPC64_CR5:
77    case UNW_PPC64_CR6:
78    case UNW_PPC64_CR7:
79    case UNW_PPC64_VRSAVE:
80    case UNW_PPC64_VSCR:
81    case UNW_PPC64_SPE_ACC:
82    case UNW_PPC64_SPEFSCR:
83      loc = c->dwarf.loc[reg];
84      break;
85
86    case UNW_TDEP_IP:
87      if (write)
88        {
89          c->dwarf.ip = *valp;  /* update the IP cache */
90          if (c->dwarf.pi_valid && (*valp < c->dwarf.pi.start_ip
91                                    || *valp >= c->dwarf.pi.end_ip))
92            c->dwarf.pi_valid = 0;      /* new IP outside of current proc */
93        }
94      else
95        *valp = c->dwarf.ip;
96      return 0;
97
98    case UNW_TDEP_SP:
99      if (write)
100        return -UNW_EREADONLYREG;
101      *valp = c->dwarf.cfa;
102      return 0;
103
104    default:
105      return -UNW_EBADREG;
106      break;
107    }
108
109  if (write)
110    return dwarf_put (&c->dwarf, loc, *valp);
111  else
112    return dwarf_get (&c->dwarf, loc, valp);
113}
114
115HIDDEN int
116tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
117                   int write)
118{
119  struct dwarf_loc loc;
120
121  if ((unsigned) (reg - UNW_PPC64_F0) < 32)
122  {
123    loc = c->dwarf.loc[reg];
124    if (write)
125      return dwarf_putfp (&c->dwarf, loc, *valp);
126    else
127      return dwarf_getfp (&c->dwarf, loc, valp);
128  }
129  else
130  if ((unsigned) (reg - UNW_PPC64_V0) < 32)
131  {
132    loc = c->dwarf.loc[reg];
133    if (write)
134      return dwarf_putvr (&c->dwarf, loc, *valp);
135    else
136      return dwarf_getvr (&c->dwarf, loc, valp);
137  }
138
139  return -UNW_EBADREG;
140}
141
142