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68070c10 PA |
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 2 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, write to the Free Software | |
17 | Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
18 | Boston, MA 02110-1301, USA. */ | |
19 | ||
20 | #include "server.h" | |
21 | #include "win32-low.h" | |
22 | ||
23 | #define FCS_REGNUM 27 | |
24 | #define FOP_REGNUM 31 | |
25 | ||
26 | #define FLAG_TRACE_BIT 0x100 | |
27 | ||
28 | static unsigned dr[8]; | |
29 | ||
30 | static void | |
31 | initial_stuff (void) | |
32 | { | |
33 | memset (&dr, 0, sizeof (dr)); | |
34 | } | |
35 | ||
36 | static void | |
37 | store_debug_registers (win32_thread_info *th) | |
38 | { | |
39 | dr[0] = th->context.Dr0; | |
40 | dr[1] = th->context.Dr1; | |
41 | dr[2] = th->context.Dr2; | |
42 | dr[3] = th->context.Dr3; | |
43 | dr[6] = th->context.Dr6; | |
44 | dr[7] = th->context.Dr7; | |
45 | } | |
46 | ||
47 | static void | |
48 | load_debug_registers (win32_thread_info *th) | |
49 | { | |
50 | th->context.Dr0 = dr[0]; | |
51 | th->context.Dr1 = dr[1]; | |
52 | th->context.Dr2 = dr[2]; | |
53 | th->context.Dr3 = dr[3]; | |
54 | /* th->context.Dr6 = dr[6]; | |
55 | FIXME: should we set dr6 also ?? */ | |
56 | th->context.Dr7 = dr[7]; | |
57 | } | |
58 | ||
59 | /* Fetch register(s) from gdbserver regcache data. */ | |
60 | static void | |
61 | do_fetch_inferior_registers (win32_thread_info *th, int r) | |
62 | { | |
63 | char *context_offset = regptr (&th->context, r); | |
64 | ||
65 | long l; | |
66 | if (r == FCS_REGNUM) | |
67 | { | |
68 | l = *((long *) context_offset) & 0xffff; | |
69 | supply_register (r, (char *) &l); | |
70 | } | |
71 | else if (r == FOP_REGNUM) | |
72 | { | |
73 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); | |
74 | supply_register (r, (char *) &l); | |
75 | } | |
76 | else | |
77 | supply_register (r, context_offset); | |
78 | } | |
79 | ||
80 | static void | |
81 | single_step (win32_thread_info *th) | |
82 | { | |
83 | th->context.EFlags |= FLAG_TRACE_BIT; | |
84 | } | |
85 | ||
86 | /* An array of offset mappings into a Win32 Context structure. | |
87 | This is a one-to-one mapping which is indexed by gdb's register | |
88 | numbers. It retrieves an offset into the context structure where | |
89 | the 4 byte register is located. | |
90 | An offset value of -1 indicates that Win32 does not provide this | |
91 | register in it's CONTEXT structure. In this case regptr will return | |
92 | a pointer into a dummy register. */ | |
93 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) | |
94 | static const int mappings[] = { | |
95 | context_offset (Eax), | |
96 | context_offset (Ecx), | |
97 | context_offset (Edx), | |
98 | context_offset (Ebx), | |
99 | context_offset (Esp), | |
100 | context_offset (Ebp), | |
101 | context_offset (Esi), | |
102 | context_offset (Edi), | |
103 | context_offset (Eip), | |
104 | context_offset (EFlags), | |
105 | context_offset (SegCs), | |
106 | context_offset (SegSs), | |
107 | context_offset (SegDs), | |
108 | context_offset (SegEs), | |
109 | context_offset (SegFs), | |
110 | context_offset (SegGs), | |
111 | context_offset (FloatSave.RegisterArea[0 * 10]), | |
112 | context_offset (FloatSave.RegisterArea[1 * 10]), | |
113 | context_offset (FloatSave.RegisterArea[2 * 10]), | |
114 | context_offset (FloatSave.RegisterArea[3 * 10]), | |
115 | context_offset (FloatSave.RegisterArea[4 * 10]), | |
116 | context_offset (FloatSave.RegisterArea[5 * 10]), | |
117 | context_offset (FloatSave.RegisterArea[6 * 10]), | |
118 | context_offset (FloatSave.RegisterArea[7 * 10]), | |
119 | context_offset (FloatSave.ControlWord), | |
120 | context_offset (FloatSave.StatusWord), | |
121 | context_offset (FloatSave.TagWord), | |
122 | context_offset (FloatSave.ErrorSelector), | |
123 | context_offset (FloatSave.ErrorOffset), | |
124 | context_offset (FloatSave.DataSelector), | |
125 | context_offset (FloatSave.DataOffset), | |
126 | context_offset (FloatSave.ErrorSelector), | |
127 | /* XMM0-7 */ | |
128 | context_offset (ExtendedRegisters[10 * 16]), | |
129 | context_offset (ExtendedRegisters[11 * 16]), | |
130 | context_offset (ExtendedRegisters[12 * 16]), | |
131 | context_offset (ExtendedRegisters[13 * 16]), | |
132 | context_offset (ExtendedRegisters[14 * 16]), | |
133 | context_offset (ExtendedRegisters[15 * 16]), | |
134 | context_offset (ExtendedRegisters[16 * 16]), | |
135 | context_offset (ExtendedRegisters[17 * 16]), | |
136 | /* MXCSR */ | |
137 | context_offset (ExtendedRegisters[24]) | |
138 | }; | |
139 | #undef context_offset | |
140 | ||
141 | struct win32_target_ops the_low_target = { | |
142 | mappings, | |
143 | sizeof (mappings) / sizeof (mappings[0]), | |
144 | initial_stuff, | |
145 | store_debug_registers, | |
146 | load_debug_registers, | |
147 | do_fetch_inferior_registers, | |
148 | single_step, | |
149 | (const char*)NULL, /* breakpoint */ | |
150 | 0, /* breakpoint_len */ | |
151 | "i386" /* arch_string */ | |
152 | }; |