1/* Copyright (C) 2007 Free Software Foundation, Inc.
2
3   This file is part of GDB.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include "server.h"
19#include "win32-low.h"
20
21#ifndef CONTEXT_FLOATING_POINT
22#define CONTEXT_FLOATING_POINT 0
23#endif
24
25static void
26arm_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
27{
28  th->context.ContextFlags = \
29    CONTEXT_FULL | \
30    CONTEXT_FLOATING_POINT;
31
32  GetThreadContext (th->h, &th->context);
33}
34
35static void
36arm_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
37{
38  SetThreadContext (th->h, &th->context);
39}
40
41#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
42static const int mappings[] = {
43  context_offset (R0),
44  context_offset (R1),
45  context_offset (R2),
46  context_offset (R3),
47  context_offset (R4),
48  context_offset (R5),
49  context_offset (R6),
50  context_offset (R7),
51  context_offset (R8),
52  context_offset (R9),
53  context_offset (R10),
54  context_offset (R11),
55  context_offset (R12),
56  context_offset (Sp),
57  context_offset (Lr),
58  context_offset (Pc),
59  -1, /* f0 */
60  -1, /* f1 */
61  -1, /* f2 */
62  -1, /* f3 */
63  -1, /* f4 */
64  -1, /* f5 */
65  -1, /* f6 */
66  -1, /* f7 */
67  -1, /* fps */
68  context_offset (Psr),
69};
70#undef context_offset
71
72/* Return a pointer into a CONTEXT field indexed by gdb register number.
73   Return a pointer to an dummy register holding zero if there is no
74   corresponding CONTEXT field for the given register number.  */
75static char *
76regptr (CONTEXT* c, int r)
77{
78  if (mappings[r] < 0)
79  {
80    static ULONG zero;
81    /* Always force value to zero, in case the user tried to write
82       to this register before.  */
83    zero = 0;
84    return (char *) &zero;
85  }
86  else
87    return (char *) c + mappings[r];
88}
89
90/* Fetch register from gdbserver regcache data.  */
91static void
92arm_fetch_inferior_register (win32_thread_info *th, int r)
93{
94  char *context_offset = regptr (&th->context, r);
95  supply_register (r, context_offset);
96}
97
98/* Store a new register value into the thread context of TH.  */
99static void
100arm_store_inferior_register (win32_thread_info *th, int r)
101{
102  collect_register (r, regptr (&th->context, r));
103}
104
105/* Correct in either endianness.  We do not support Thumb yet.  */
106static const unsigned long arm_wince_breakpoint = 0xe6000010;
107#define arm_wince_breakpoint_len 4
108
109struct win32_target_ops the_low_target = {
110  sizeof (mappings) / sizeof (mappings[0]),
111  NULL, /* initial_stuff */
112  arm_get_thread_context,
113  arm_set_thread_context,
114  NULL, /* thread_added */
115  arm_fetch_inferior_register,
116  arm_store_inferior_register,
117  NULL, /* single_step */
118  (const unsigned char *) &arm_wince_breakpoint,
119  arm_wince_breakpoint_len,
120  "arm" /* arch_string */
121};
122