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
7 This file is part of libunwind.
8
9 Permission is hereby granted, free of charge, to any person obtaining
10 a copy of this software and associated documentation files (the
11 "Software"), to deal in the Software without restriction, including
12 without limitation the rights to use, copy, modify, merge, publish,
13 distribute, sublicense, and/or sell copies of the Software, and to
14 permit persons to whom the Software is furnished to do so, subject to
15 the following conditions:
16
17 The above copyright notice and this permission notice shall be
18 included in all copies or substantial portions of the Software.
19
20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
27
28 #include "unwind_i.h"
29
30 HIDDEN int
tdep_access_reg(struct cursor * c,unw_regnum_t reg,unw_word_t * valp,int write)31 tdep_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
115 HIDDEN int
tdep_access_fpreg(struct cursor * c,unw_regnum_t reg,unw_fpreg_t * valp,int write)116 tdep_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