1 /* libunwind - a platform-independent unwind library
2
3 This file is part of libunwind.
4
5 Permission is hereby granted, free of charge, to any person obtaining
6 a copy of this software and associated documentation files (the
7 "Software"), to deal in the Software without restriction, including
8 without limitation the rights to use, copy, modify, merge, publish,
9 distribute, sublicense, and/or sell copies of the Software, and to
10 permit persons to whom the Software is furnished to do so, subject to
11 the following conditions:
12
13 The above copyright notice and this permission notice shall be
14 included in all copies or substantial portions of the Software.
15
16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
23
24 #include "_UCD_lib.h"
25
26 #include "_UCD_internal.h"
27
28 int
_UCD_access_reg(unw_addr_space_t as,unw_regnum_t regnum,unw_word_t * valp,int write,void * arg)29 _UCD_access_reg (unw_addr_space_t as,
30 unw_regnum_t regnum, unw_word_t *valp,
31 int write, void *arg)
32 {
33 if (write)
34 {
35 Debug(0, "write is not supported\n");
36 return -UNW_EINVAL;
37 }
38
39 struct UCD_info *ui = arg;
40
41 #if defined(UNW_TARGET_X86)
42 switch (regnum) {
43 case UNW_X86_EAX:
44 *valp = ui->prstatus->pr_reg.r_eax;
45 break;
46 case UNW_X86_EDX:
47 *valp = ui->prstatus->pr_reg.r_edx;
48 break;
49 case UNW_X86_ECX:
50 *valp = ui->prstatus->pr_reg.r_ecx;
51 break;
52 case UNW_X86_EBX:
53 *valp = ui->prstatus->pr_reg.r_ebx;
54 break;
55 case UNW_X86_ESI:
56 *valp = ui->prstatus->pr_reg.r_esi;
57 break;
58 case UNW_X86_EDI:
59 *valp = ui->prstatus->pr_reg.r_edi;
60 break;
61 case UNW_X86_EBP:
62 *valp = ui->prstatus->pr_reg.r_ebp;
63 break;
64 case UNW_X86_ESP:
65 *valp = ui->prstatus->pr_reg.r_esp;
66 break;
67 case UNW_X86_EIP:
68 *valp = ui->prstatus->pr_reg.r_eip;
69 break;
70 case UNW_X86_EFLAGS:
71 *valp = ui->prstatus->pr_reg.r_eflags;
72 break;
73 case UNW_X86_TRAPNO:
74 *valp = ui->prstatus->pr_reg.r_trapno;
75 break;
76 default:
77 Debug(0, "bad regnum:%d\n", regnum);
78 return -UNW_EINVAL;
79 }
80 #elif defined(UNW_TARGET_X86_64)
81 switch (regnum) {
82 case UNW_X86_64_RAX:
83 *valp = ui->prstatus->pr_reg.r_rax;
84 break;
85 case UNW_X86_64_RDX:
86 *valp = ui->prstatus->pr_reg.r_rdx;
87 break;
88 case UNW_X86_64_RCX:
89 *valp = ui->prstatus->pr_reg.r_rcx;
90 break;
91 case UNW_X86_64_RBX:
92 *valp = ui->prstatus->pr_reg.r_rbx;
93 break;
94 case UNW_X86_64_RSI:
95 *valp = ui->prstatus->pr_reg.r_rsi;
96 break;
97 case UNW_X86_64_RDI:
98 *valp = ui->prstatus->pr_reg.r_rdi;
99 break;
100 case UNW_X86_64_RBP:
101 *valp = ui->prstatus->pr_reg.r_rbp;
102 break;
103 case UNW_X86_64_RSP:
104 *valp = ui->prstatus->pr_reg.r_rsp;
105 break;
106 case UNW_X86_64_RIP:
107 *valp = ui->prstatus->pr_reg.r_rip;
108 break;
109 default:
110 Debug(0, "bad regnum:%d\n", regnum);
111 return -UNW_EINVAL;
112 }
113 #elif defined(UNW_TARGET_ARM)
114 if (regnum >= UNW_ARM_R0 && regnum <= UNW_ARM_R12) {
115 *valp = ui->prstatus->pr_reg.r[regnum];
116 } else {
117 switch (regnum) {
118 case UNW_ARM_R13:
119 *valp = ui->prstatus->pr_reg.r_sp;
120 break;
121 case UNW_ARM_R14:
122 *valp = ui->prstatus->pr_reg.r_lr;
123 break;
124 case UNW_ARM_R15:
125 *valp = ui->prstatus->pr_reg.r_pc;
126 break;
127 default:
128 Debug(0, "bad regnum:%d\n", regnum);
129 return -UNW_EINVAL;
130 }
131 }
132 #elif defined(UNW_TARGET_AARCH64)
133 if (regnum >= UNW_AARCH64_X0 && regnum < UNW_AARCH64_X30) {
134 *valp = ui->prstatus->pr_reg.x[regnum];
135 } else {
136 switch (regnum) {
137 case UNW_AARCH64_SP:
138 *valp = ui->prstatus->pr_reg.sp;
139 break;
140 case UNW_AARCH64_X30:
141 *valp = ui->prstatus->pr_reg.lr;
142 break;
143 case UNW_AARCH64_PC:
144 *valp = ui->prstatus->pr_reg.elr;
145 break;
146 default:
147 Debug(0, "bad regnum:%d\n", regnum);
148 return -UNW_EINVAL;
149 }
150 }
151
152 #else
153 #error Port me
154 #endif
155
156 return 0;
157 }
158