1/* Copyright (C) 2007, 2008, 2009, 2010, 2011 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
25/* Defined in auto-generated file reg-arm.c.  */
26void init_registers_arm (void);
27
28
29static void
30arm_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
31{
32  th->context.ContextFlags = \
33    CONTEXT_FULL | \
34    CONTEXT_FLOATING_POINT;
35
36  GetThreadContext (th->h, &th->context);
37}
38
39static void
40arm_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
41{
42  SetThreadContext (th->h, &th->context);
43}
44
45#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
46static const int mappings[] = {
47  context_offset (R0),
48  context_offset (R1),
49  context_offset (R2),
50  context_offset (R3),
51  context_offset (R4),
52  context_offset (R5),
53  context_offset (R6),
54  context_offset (R7),
55  context_offset (R8),
56  context_offset (R9),
57  context_offset (R10),
58  context_offset (R11),
59  context_offset (R12),
60  context_offset (Sp),
61  context_offset (Lr),
62  context_offset (Pc),
63  -1, /* f0 */
64  -1, /* f1 */
65  -1, /* f2 */
66  -1, /* f3 */
67  -1, /* f4 */
68  -1, /* f5 */
69  -1, /* f6 */
70  -1, /* f7 */
71  -1, /* fps */
72  context_offset (Psr),
73};
74#undef context_offset
75
76/* Return a pointer into a CONTEXT field indexed by gdb register number.
77   Return a pointer to an dummy register holding zero if there is no
78   corresponding CONTEXT field for the given register number.  */
79static char *
80regptr (CONTEXT* c, int r)
81{
82  if (mappings[r] < 0)
83  {
84    static ULONG zero;
85    /* Always force value to zero, in case the user tried to write
86       to this register before.  */
87    zero = 0;
88    return (char *) &zero;
89  }
90  else
91    return (char *) c + mappings[r];
92}
93
94/* Fetch register from gdbserver regcache data.  */
95static void
96arm_fetch_inferior_register (struct regcache *regcache,
97			     win32_thread_info *th, int r)
98{
99  char *context_offset = regptr (&th->context, r);
100  supply_register (regcache, r, context_offset);
101}
102
103/* Store a new register value into the thread context of TH.  */
104static void
105arm_store_inferior_register (struct regcache *regcache,
106			     win32_thread_info *th, int r)
107{
108  collect_register (regcache, r, regptr (&th->context, r));
109}
110
111/* Correct in either endianness.  We do not support Thumb yet.  */
112static const unsigned long arm_wince_breakpoint = 0xe6000010;
113#define arm_wince_breakpoint_len 4
114
115struct win32_target_ops the_low_target = {
116  init_registers_arm,
117  sizeof (mappings) / sizeof (mappings[0]),
118  NULL, /* initial_stuff */
119  arm_get_thread_context,
120  arm_set_thread_context,
121  NULL, /* thread_added */
122  arm_fetch_inferior_register,
123  arm_store_inferior_register,
124  NULL, /* single_step */
125  (const unsigned char *) &arm_wince_breakpoint,
126  arm_wince_breakpoint_len,
127  /* Watchpoint related functions.  See target.h for comments.  */
128  NULL, /* insert_point */
129  NULL, /* remove_point */
130  NULL, /* stopped_by_watchpoint */
131  NULL  /* stopped_data_address */
132};
133