1/* libunwind - a platform-independent unwind library
2
3This file is part of libunwind.
4
5Permission is hereby granted, free of charge, to any person obtaining
6a copy of this software and associated documentation files (the
7"Software"), to deal in the Software without restriction, including
8without limitation the rights to use, copy, modify, merge, publish,
9distribute, sublicense, and/or sell copies of the Software, and to
10permit persons to whom the Software is furnished to do so, subject to
11the following conditions:
12
13The above copyright notice and this permission notice shall be
14included in all copies or substantial portions of the Software.
15
16THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
23
24#include "_UCD_lib.h"
25
26#include "_UCD_internal.h"
27
28int
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#else
114#error Port me
115#endif
116
117  return 0;
118}
119