summaryrefslogtreecommitdiffstats
path: root/private/ntos/rtl/mips/debugstb.s
blob: 4a305eaa1a82ca3dab1e06e1edbce12a83e181e9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
//      TITLE("Debug Support Functions")
//++
//
// Copyright (c) 1990  Microsoft Corporation
//
// Module Name:
//
//    debug.s
//
// Abstract:
//
//    This module implements functions to support debugging NT.  Each
//    function executes a trap r31,r29,r0 instruction with a special value in
//    R31.  The simulator decodes this trap instruction and dispatches to the
//    correct piece of code in the simulator based on the value in R31.  See
//    the simscal.c source file in the simulator source directory.
//
// Author:
//
//    Steven R. Wood (stevewo) 3-Aug-1989
//
// Environment:
//
//    Any mode.
//
// Revision History:
//
//--

#include "ksmips.h"

//++
//
// VOID
// DbgBreakPoint()
//
// Routine Description:
//
//    This function executes a breakpoint instruction.  Useful for entering
//    the debugger under program control.  This breakpoint will always go to
//    the kernel debugger if one is installed, otherwise it will go to the
//    debug subsystem.
//
// Arguments:
//
//    None.
//
// Return Value:
//
//    None.
//
//--

        LEAF_ENTRY(DbgBreakPoint)

        break   DEBUG_STOP_BREAKPOINT
        j       ra

        .end    DbgBreakPoint

//++
//
// VOID
// DbgBreakPointWithStatus(
//     IN ULONG Status
//     )
//
// Routine Description:
//
//    This function executes a breakpoint instruction.  Useful for entering
//    the debugger under program control.  This breakpoint will always go to
//    the kernel debugger if one is installed, otherwise it will go to the
//    debug subsystem.  This function is identical to DbgBreakPoint, except
//    that it takes an argument which the debugger can see.
//
// Arguments:
//
//    None.
//
// Return Value:
//
//    None.
//
//--

        LEAF_ENTRY(DbgBreakPointWithStatus)

        ALTERNATE_ENTRY(RtlpBreakWithStatusInstruction)
        break   DEBUG_STOP_BREAKPOINT
        j       ra

        .end    DbgBreakPointWithStatus

//++
//
// VOID
// DbgUserBreakPoint()
//
// Routine Description:
//
//    This function executes a breakpoint instruction.  Useful for entering
//    the debug subsystem under program control.  The kernel debug will ignore
//    this breakpoint since it will not find the instruction address in its
//    breakpoint table.
//
// Arguments:
//
//    None.
//
// Return Value:
//
//    None.
//
//--

        LEAF_ENTRY(DbgUserBreakPoint)

        break   DEBUG_STOP_BREAKPOINT
        j       ra

        .end    DbgUserBreakPoint

//++
//
// ULONG
// DebugPrompt(
//     IN PSTRING Output,
//     IN PSTRING Input
//     )
//
// Routine Description:
//
//    This function executes a debug prompt breakpoint.
//
// Arguments:
//
//    Output (a0) - Supplies a pointer to the output string descriptor.
//
//    Input (a1) - Supplies a pointer to the input string descriptor.
//
// Return Value:
//
//    The length of the input string is returned as the function value.
//
//--

#if DEVL

        LEAF_ENTRY(DebugPrompt)

        lhu     a3,StrMaximumLength(a1) // set maximum length of input string
        lw      a2,StrBuffer(a1)        // set address of input string
        lhu     a1,StrLength(a0)        // set length of output string
        lw      a0,StrBuffer(a0)        // set address of output string
        break   DEBUG_PROMPT_BREAKPOINT  // execute a debug prompt breakpoint
        j       ra                      // return

        .end    DebugPrompt

#endif


//++
//
// VOID
// DebugLoadImageSymbols(
//     IN PSTRING ImagePathName,
//     IN PKD_SYMBOLS_INFO SymbolInfo
//     )
//
// Routine Description:
//
//    This function calls the kernel debugger to load the symbol
//    table for the specified image.
//
// Arguments:
//
//    ImagePathName - specifies the fully qualified path name of the image
//       file that has been loaded into an NT address space.
//
//    SymbolInfo - information captured from header of image file.
//
// Return Value:
//
//    None.
//
//--

#if DEVL

        LEAF_ENTRY(DebugLoadImageSymbols)

        break   DEBUG_LOAD_SYMBOLS_BREAKPOINT
        j       ra

        .end    DebugLoadImageSymbols

#endif

//++
//
// VOID
// DebugUnLoadImageSymbols(
//     IN PSTRING ImagePathName,
//     IN PKD_SYMBOLS_INFO SymbolInfo
//     )
//
// Routine Description:
//
//    This function calls the kernel debugger to unload the symbol
//    table for the specified image.
//
// Arguments:
//
//    ImagePathName - specifies the fully qualified path name of the image
//       file that has been unloaded from an NT address space.
//
//    SymbolInfo - information captured from header of image file.
//
// Return Value:
//
//    None.
//
//--

#if DEVL

        LEAF_ENTRY(DebugUnLoadImageSymbols)

        break   DEBUG_UNLOAD_SYMBOLS_BREAKPOINT
        j       ra

        .end    DebugUnLoadImageSymbols

#endif

//++
//
// NTSTATUS
// DebugPrint(
//     IN PSTRING Output
//     )
//
// Routine Description:
//
//    This function executes a debug print breakpoint.
//
// Arguments:
//
//    Output (a0) - Supplies a pointer to the output string descriptor.
//
// Return Value:
//
//    Status code.  STATUS_SUCCESS if debug print happened.
//    STATUS_BREAKPOINT if user typed a Control-C during print.
//    STATUS_DEVICE_NOT_CONNECTED if kernel debugger not present.
//
//--

#if DEVL

        LEAF_ENTRY(DebugPrint)

        lhu     a1,StrLength(a0)        // set length of output string
        lw      a0,StrBuffer(a0)        // set address of output string
        break   DEBUG_PRINT_BREAKPOINT  // execute a debug print breakpoint
        j       ra                      // return

        .end    DebugPrint

#endif