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
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
|
/* OBSOLETE /* GOULD RISC target-dependent code for GDB, the GNU debugger. */
/* OBSOLETE Copyright 1986, 1987, 1989, 1991 Free Software Foundation, Inc. */
/* OBSOLETE */
/* OBSOLETE This file is part of GDB. */
/* OBSOLETE */
/* OBSOLETE This program is free software; you can redistribute it and/or modify */
/* OBSOLETE it under the terms of the GNU General Public License as published by */
/* OBSOLETE the Free Software Foundation; either version 2 of the License, or */
/* OBSOLETE (at your option) any later version. */
/* OBSOLETE */
/* OBSOLETE This program is distributed in the hope that it will be useful, */
/* OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* OBSOLETE GNU General Public License for more details. */
/* OBSOLETE */
/* OBSOLETE You should have received a copy of the GNU General Public License */
/* OBSOLETE along with this program; if not, write to the Free Software */
/* OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *x/ */
/* OBSOLETE */
/* OBSOLETE #include "defs.h" */
/* OBSOLETE #include "symtab.h" */
/* OBSOLETE #include "frame.h" */
/* OBSOLETE #include "gdbcore.h" */
/* OBSOLETE #if defined GOULD_PN */
/* OBSOLETE #include "opcode/pn.h" */
/* OBSOLETE #else */
/* OBSOLETE #include "opcode/np1.h" */
/* OBSOLETE #endif */
/* OBSOLETE */
/* OBSOLETE /* GOULD RISC instructions are never longer than this many bytes. *x/ */
/* OBSOLETE #define MAXLEN 4 */
/* OBSOLETE */
/* OBSOLETE /* Number of elements in the opcode table. *x/ */
/* OBSOLETE #define NOPCODES (sizeof gld_opcodes / sizeof gld_opcodes[0]) */
/* OBSOLETE */
/* OBSOLETE int */
/* OBSOLETE gould_frame_chain_valid (chain, fi) */
/* OBSOLETE CORE_ADDR chain; */
/* OBSOLETE struct frame_info *fi; /* not used here *x/ */
/* OBSOLETE { */
/* OBSOLETE return (chain != 0 && chain != (thisframe)->frame); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Both gcc and cc return small structs in registers (i.e. in GDB */
/* OBSOLETE terminology, small structs don't use the struct return convention). *x/ */
/* OBSOLETE int */
/* OBSOLETE gould_use_struct_convention (gcc_p, type) */
/* OBSOLETE int gcc_p; */
/* OBSOLETE struct type *type; */
/* OBSOLETE { */
/* OBSOLETE return (TYPE_LENGTH(type) > 8); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE */
/* OBSOLETE */
/* OBSOLETE /* Print the GOULD instruction at address MEMADDR in debugged memory, */
/* OBSOLETE on STREAM. Returns length of the instruction, in bytes. *x/ */
/* OBSOLETE */
/* OBSOLETE int */
/* OBSOLETE gould_print_insn (memaddr, stream) */
/* OBSOLETE CORE_ADDR memaddr; */
/* OBSOLETE FILE *stream; */
/* OBSOLETE { */
/* OBSOLETE unsigned char buffer[MAXLEN]; */
/* OBSOLETE register int i; */
/* OBSOLETE register char *d; */
/* OBSOLETE register int bestmask; */
/* OBSOLETE unsigned best; */
/* OBSOLETE int temp, index, bestlen; */
/* OBSOLETE */
/* OBSOLETE read_memory (memaddr, buffer, MAXLEN); */
/* OBSOLETE */
/* OBSOLETE bestmask = 0; */
/* OBSOLETE index = -1; */
/* OBSOLETE best = 0xffffffff; */
/* OBSOLETE for (i = 0; i < NOPCODES; i++) */
/* OBSOLETE { */
/* OBSOLETE register unsigned int opcode = gld_opcodes[i].opcode; */
/* OBSOLETE register unsigned int mask = gld_opcodes[i].mask; */
/* OBSOLETE register unsigned int len = gld_opcodes[i].length; */
/* OBSOLETE register unsigned int test; */
/* OBSOLETE */
/* OBSOLETE /* Get possible opcode bytes into integer *x/ */
/* OBSOLETE test = buffer[0] << 24; */
/* OBSOLETE test |= buffer[1] << 16; */
/* OBSOLETE test |= buffer[2] << 8; */
/* OBSOLETE test |= buffer[3]; */
/* OBSOLETE */
/* OBSOLETE /* Mask with opcode and see if match *x/ */
/* OBSOLETE if ((opcode & mask) == (test & mask)) */
/* OBSOLETE { */
/* OBSOLETE /* See if second or third match *x/ */
/* OBSOLETE if (index >= 0) */
/* OBSOLETE { */
/* OBSOLETE /* Take new one if it looks good *x/ */
/* OBSOLETE if (bestlen == MAXLEN && len == MAXLEN) */
/* OBSOLETE { */
/* OBSOLETE /* See if lower bits matched *x/ */
/* OBSOLETE if (((bestmask & 3) == 0) && */
/* OBSOLETE ((mask & 3) != 0)) */
/* OBSOLETE { */
/* OBSOLETE bestmask = mask; */
/* OBSOLETE bestlen = len; */
/* OBSOLETE best = test; */
/* OBSOLETE index = i; */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE else */
/* OBSOLETE { */
/* OBSOLETE /* First match, save it *x/ */
/* OBSOLETE bestmask = mask; */
/* OBSOLETE bestlen = len; */
/* OBSOLETE best = test; */
/* OBSOLETE index = i; */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Handle undefined instructions. *x/ */
/* OBSOLETE if (index < 0) */
/* OBSOLETE { */
/* OBSOLETE fprintf (stream, "undefined 0%o",(buffer[0]<<8)+buffer[1]); */
/* OBSOLETE return 2; */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Print instruction name *x/ */
/* OBSOLETE fprintf (stream, "%-12s", gld_opcodes[index].name); */
/* OBSOLETE */
/* OBSOLETE /* Adjust if short instruction *x/ */
/* OBSOLETE if (gld_opcodes[index].length < 4) */
/* OBSOLETE { */
/* OBSOLETE best >>= 16; */
/* OBSOLETE i = 0; */
/* OBSOLETE } */
/* OBSOLETE else */
/* OBSOLETE { */
/* OBSOLETE i = 16; */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Dump out instruction arguments *x/ */
/* OBSOLETE for (d = gld_opcodes[index].args; *d; ++d) */
/* OBSOLETE { */
/* OBSOLETE switch (*d) */
/* OBSOLETE { */
/* OBSOLETE case 'f': */
/* OBSOLETE fprintf (stream, "%d", (best >> (7 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'r': */
/* OBSOLETE fprintf (stream, "r%d", (best >> (7 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'R': */
/* OBSOLETE fprintf (stream, "r%d", (best >> (4 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'b': */
/* OBSOLETE fprintf (stream, "b%d", (best >> (7 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'B': */
/* OBSOLETE fprintf (stream, "b%d", (best >> (4 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'v': */
/* OBSOLETE fprintf (stream, "b%d", (best >> (7 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'V': */
/* OBSOLETE fprintf (stream, "b%d", (best >> (4 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'X': */
/* OBSOLETE temp = (best >> 20) & 7; */
/* OBSOLETE if (temp) */
/* OBSOLETE fprintf (stream, "r%d", temp); */
/* OBSOLETE else */
/* OBSOLETE putc ('0', stream); */
/* OBSOLETE break; */
/* OBSOLETE case 'A': */
/* OBSOLETE temp = (best >> 16) & 7; */
/* OBSOLETE if (temp) */
/* OBSOLETE fprintf (stream, "(b%d)", temp); */
/* OBSOLETE break; */
/* OBSOLETE case 'S': */
/* OBSOLETE fprintf (stream, "#%d", best & 0x1f); */
/* OBSOLETE break; */
/* OBSOLETE case 'I': */
/* OBSOLETE fprintf (stream, "#%x", best & 0xffff); */
/* OBSOLETE break; */
/* OBSOLETE case 'O': */
/* OBSOLETE fprintf (stream, "%x", best & 0xffff); */
/* OBSOLETE break; */
/* OBSOLETE case 'h': */
/* OBSOLETE fprintf (stream, "%d", best & 0xfffe); */
/* OBSOLETE break; */
/* OBSOLETE case 'd': */
/* OBSOLETE fprintf (stream, "%d", best & 0xfffc); */
/* OBSOLETE break; */
/* OBSOLETE case 'T': */
/* OBSOLETE fprintf (stream, "%d", (best >> 8) & 0xff); */
/* OBSOLETE break; */
/* OBSOLETE case 'N': */
/* OBSOLETE fprintf (stream, "%d", best & 0xff); */
/* OBSOLETE break; */
/* OBSOLETE default: */
/* OBSOLETE putc (*d, stream); */
/* OBSOLETE break; */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Return length of instruction *x/ */
/* OBSOLETE return (gld_opcodes[index].length); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* */
/* OBSOLETE * Find the number of arguments to a function. */
/* OBSOLETE *x/ */
/* OBSOLETE findarg(frame) */
/* OBSOLETE struct frame_info *frame; */
/* OBSOLETE { */
/* OBSOLETE register struct symbol *func; */
/* OBSOLETE register unsigned pc; */
/* OBSOLETE */
/* OBSOLETE #ifdef notdef */
/* OBSOLETE /* find starting address of frame function *x/ */
/* OBSOLETE pc = get_pc_function_start (frame->pc); */
/* OBSOLETE */
/* OBSOLETE /* find function symbol info *x/ */
/* OBSOLETE func = find_pc_function (pc); */
/* OBSOLETE */
/* OBSOLETE /* call blockframe code to look for match *x/ */
/* OBSOLETE if (func != NULL) */
/* OBSOLETE return (func->value.block->nsyms / sizeof(int)); */
/* OBSOLETE #endif */
/* OBSOLETE */
/* OBSOLETE return (-1); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* */
/* OBSOLETE * In the case of the NPL, the frame's norminal address is Br2 and the */
/* OBSOLETE * previous routines frame is up the stack X bytes. Finding out what */
/* OBSOLETE * 'X' is can be tricky. */
/* OBSOLETE * */
/* OBSOLETE * 1.) stored in the code function header xA(Br1). */
/* OBSOLETE * 2.) must be careful of recurssion. */
/* OBSOLETE *x/ */
/* OBSOLETE CORE_ADDR */
/* OBSOLETE findframe(thisframe) */
/* OBSOLETE struct frame_info *thisframe; */
/* OBSOLETE { */
/* OBSOLETE register CORE_ADDR pointer; */
/* OBSOLETE CORE_ADDR framechain(); */
/* OBSOLETE #if 0 */
/* OBSOLETE struct frame_info *frame; */
/* OBSOLETE */
/* OBSOLETE /* Setup toplevel frame structure *x/ */
/* OBSOLETE frame->pc = read_pc(); */
/* OBSOLETE frame->next_frame = 0; */
/* OBSOLETE frame->frame = read_register (SP_REGNUM); /* Br2 *x/ */
/* OBSOLETE */
/* OBSOLETE /* Search for this frame (start at current Br2) *x/ */
/* OBSOLETE do */
/* OBSOLETE { */
/* OBSOLETE pointer = framechain(frame); */
/* OBSOLETE frame->next_frame = frame->frame; */
/* OBSOLETE frame->frame = pointer; */
/* OBSOLETE frame->pc = FRAME_SAVED_PC(frame); */
/* OBSOLETE } */
/* OBSOLETE while (frame->next_frame != thisframe); */
/* OBSOLETE #endif */
/* OBSOLETE */
/* OBSOLETE pointer = framechain (thisframe); */
/* OBSOLETE */
/* OBSOLETE /* stop gap for now, end at __base3 *x/ */
/* OBSOLETE if (thisframe->pc == 0) */
/* OBSOLETE return 0; */
/* OBSOLETE */
/* OBSOLETE return pointer; */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* */
/* OBSOLETE * Gdb front-end and internal framechain routine. */
/* OBSOLETE * Go back up stack one level. Tricky... */
/* OBSOLETE *x/ */
/* OBSOLETE CORE_ADDR */
/* OBSOLETE framechain(frame) */
/* OBSOLETE register struct frame_info *frame; */
/* OBSOLETE { */
/* OBSOLETE register CORE_ADDR func, prevsp; */
/* OBSOLETE register unsigned value; */
/* OBSOLETE */
/* OBSOLETE /* Get real function start address from internal frame address *x/ */
/* OBSOLETE func = get_pc_function_start(frame->pc); */
/* OBSOLETE */
/* OBSOLETE /* If no stack given, read register Br1 "(sp)" *x/ */
/* OBSOLETE if (!frame->frame) */
/* OBSOLETE prevsp = read_register (SP_REGNUM); */
/* OBSOLETE else */
/* OBSOLETE prevsp = frame->frame; */
/* OBSOLETE */
/* OBSOLETE /* Check function header, case #2 *x/ */
/* OBSOLETE value = read_memory_integer (func, 4); */
/* OBSOLETE if (value) */
/* OBSOLETE { */
/* OBSOLETE /* 32bit call push value stored in function header *x/ */
/* OBSOLETE prevsp += value; */
/* OBSOLETE } */
/* OBSOLETE else */
/* OBSOLETE { */
/* OBSOLETE /* read half-word from suabr at start of function *x/ */
/* OBSOLETE prevsp += read_memory_integer (func + 10, 2); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE return (prevsp); */
/* OBSOLETE } */
|
