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9b254dd1 | 1 | /* Copyright (C) 2007, 2008 Free Software Foundation, Inc. |
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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 | |
a9762ec7 | 7 | the Free Software Foundation; either version 3 of the License, or |
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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 | |
a9762ec7 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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17 | |
18 | #include "server.h" | |
19 | #include "win32-low.h" | |
20 | ||
21 | #define FCS_REGNUM 27 | |
22 | #define FOP_REGNUM 31 | |
23 | ||
24 | #define FLAG_TRACE_BIT 0x100 | |
25 | ||
d05b4ac3 UW |
26 | /* Defined in auto-generated file reg-i386.c. */ |
27 | void init_registers_i386 (void); | |
28 | ||
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29 | static unsigned dr[8]; |
30 | ||
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31 | static int debug_registers_changed = 0; |
32 | static int debug_registers_used = 0; | |
33 | ||
68070c10 | 34 | static void |
34b34921 | 35 | i386_initial_stuff (void) |
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36 | { |
37 | memset (&dr, 0, sizeof (dr)); | |
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38 | debug_registers_changed = 0; |
39 | debug_registers_used = 0; | |
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40 | } |
41 | ||
42 | static void | |
34b34921 | 43 | i386_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event) |
68070c10 | 44 | { |
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45 | th->context.ContextFlags = \ |
46 | CONTEXT_FULL | \ | |
47 | CONTEXT_FLOATING_POINT | \ | |
48 | CONTEXT_EXTENDED_REGISTERS | \ | |
49 | CONTEXT_DEBUG_REGISTERS; | |
50 | ||
51 | GetThreadContext (th->h, &th->context); | |
52 | ||
53 | debug_registers_changed = 0; | |
54 | ||
55 | if (th->tid == current_event->dwThreadId) | |
56 | { | |
57 | /* Copy dr values from the current thread. */ | |
58 | dr[0] = th->context.Dr0; | |
59 | dr[1] = th->context.Dr1; | |
60 | dr[2] = th->context.Dr2; | |
61 | dr[3] = th->context.Dr3; | |
62 | dr[6] = th->context.Dr6; | |
63 | dr[7] = th->context.Dr7; | |
64 | } | |
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65 | } |
66 | ||
67 | static void | |
34b34921 | 68 | i386_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event) |
68070c10 | 69 | { |
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70 | if (debug_registers_changed) |
71 | { | |
72 | th->context.Dr0 = dr[0]; | |
73 | th->context.Dr1 = dr[1]; | |
74 | th->context.Dr2 = dr[2]; | |
75 | th->context.Dr3 = dr[3]; | |
76 | /* th->context.Dr6 = dr[6]; | |
77 | FIXME: should we set dr6 also ?? */ | |
78 | th->context.Dr7 = dr[7]; | |
79 | } | |
80 | ||
81 | SetThreadContext (th->h, &th->context); | |
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82 | } |
83 | ||
68070c10 | 84 | static void |
34b34921 | 85 | i386_thread_added (win32_thread_info *th) |
68070c10 | 86 | { |
34b34921 PA |
87 | /* Set the debug registers for the new thread if they are used. */ |
88 | if (debug_registers_used) | |
68070c10 | 89 | { |
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90 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
91 | GetThreadContext (th->h, &th->context); | |
92 | ||
93 | th->context.Dr0 = dr[0]; | |
94 | th->context.Dr1 = dr[1]; | |
95 | th->context.Dr2 = dr[2]; | |
96 | th->context.Dr3 = dr[3]; | |
97 | /* th->context.Dr6 = dr[6]; | |
98 | FIXME: should we set dr6 also ?? */ | |
99 | th->context.Dr7 = dr[7]; | |
100 | ||
101 | SetThreadContext (th->h, &th->context); | |
102 | th->context.ContextFlags = 0; | |
68070c10 | 103 | } |
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104 | } |
105 | ||
106 | static void | |
34b34921 | 107 | i386_single_step (win32_thread_info *th) |
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108 | { |
109 | th->context.EFlags |= FLAG_TRACE_BIT; | |
110 | } | |
111 | ||
112 | /* An array of offset mappings into a Win32 Context structure. | |
113 | This is a one-to-one mapping which is indexed by gdb's register | |
114 | numbers. It retrieves an offset into the context structure where | |
115 | the 4 byte register is located. | |
116 | An offset value of -1 indicates that Win32 does not provide this | |
117 | register in it's CONTEXT structure. In this case regptr will return | |
118 | a pointer into a dummy register. */ | |
119 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) | |
120 | static const int mappings[] = { | |
121 | context_offset (Eax), | |
122 | context_offset (Ecx), | |
123 | context_offset (Edx), | |
124 | context_offset (Ebx), | |
125 | context_offset (Esp), | |
126 | context_offset (Ebp), | |
127 | context_offset (Esi), | |
128 | context_offset (Edi), | |
129 | context_offset (Eip), | |
130 | context_offset (EFlags), | |
131 | context_offset (SegCs), | |
132 | context_offset (SegSs), | |
133 | context_offset (SegDs), | |
134 | context_offset (SegEs), | |
135 | context_offset (SegFs), | |
136 | context_offset (SegGs), | |
137 | context_offset (FloatSave.RegisterArea[0 * 10]), | |
138 | context_offset (FloatSave.RegisterArea[1 * 10]), | |
139 | context_offset (FloatSave.RegisterArea[2 * 10]), | |
140 | context_offset (FloatSave.RegisterArea[3 * 10]), | |
141 | context_offset (FloatSave.RegisterArea[4 * 10]), | |
142 | context_offset (FloatSave.RegisterArea[5 * 10]), | |
143 | context_offset (FloatSave.RegisterArea[6 * 10]), | |
144 | context_offset (FloatSave.RegisterArea[7 * 10]), | |
145 | context_offset (FloatSave.ControlWord), | |
146 | context_offset (FloatSave.StatusWord), | |
147 | context_offset (FloatSave.TagWord), | |
148 | context_offset (FloatSave.ErrorSelector), | |
149 | context_offset (FloatSave.ErrorOffset), | |
150 | context_offset (FloatSave.DataSelector), | |
151 | context_offset (FloatSave.DataOffset), | |
152 | context_offset (FloatSave.ErrorSelector), | |
153 | /* XMM0-7 */ | |
154 | context_offset (ExtendedRegisters[10 * 16]), | |
155 | context_offset (ExtendedRegisters[11 * 16]), | |
156 | context_offset (ExtendedRegisters[12 * 16]), | |
157 | context_offset (ExtendedRegisters[13 * 16]), | |
158 | context_offset (ExtendedRegisters[14 * 16]), | |
159 | context_offset (ExtendedRegisters[15 * 16]), | |
160 | context_offset (ExtendedRegisters[16 * 16]), | |
161 | context_offset (ExtendedRegisters[17 * 16]), | |
162 | /* MXCSR */ | |
163 | context_offset (ExtendedRegisters[24]) | |
164 | }; | |
165 | #undef context_offset | |
166 | ||
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167 | /* Fetch register from gdbserver regcache data. */ |
168 | static void | |
169 | i386_fetch_inferior_register (win32_thread_info *th, int r) | |
170 | { | |
171 | char *context_offset = (char *) &th->context + mappings[r]; | |
172 | ||
173 | long l; | |
174 | if (r == FCS_REGNUM) | |
175 | { | |
176 | l = *((long *) context_offset) & 0xffff; | |
177 | supply_register (r, (char *) &l); | |
178 | } | |
179 | else if (r == FOP_REGNUM) | |
180 | { | |
181 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); | |
182 | supply_register (r, (char *) &l); | |
183 | } | |
184 | else | |
185 | supply_register (r, context_offset); | |
186 | } | |
187 | ||
188 | /* Store a new register value into the thread context of TH. */ | |
189 | static void | |
190 | i386_store_inferior_register (win32_thread_info *th, int r) | |
191 | { | |
192 | char *context_offset = (char *) &th->context + mappings[r]; | |
193 | collect_register (r, context_offset); | |
194 | } | |
195 | ||
68070c10 | 196 | struct win32_target_ops the_low_target = { |
d05b4ac3 | 197 | init_registers_i386, |
68070c10 | 198 | sizeof (mappings) / sizeof (mappings[0]), |
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199 | i386_initial_stuff, |
200 | i386_get_thread_context, | |
201 | i386_set_thread_context, | |
202 | i386_thread_added, | |
203 | i386_fetch_inferior_register, | |
204 | i386_store_inferior_register, | |
205 | i386_single_step, | |
206 | NULL, /* breakpoint */ | |
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207 | 0, /* breakpoint_len */ |
208 | "i386" /* arch_string */ | |
209 | }; |