1 /* parent.c -- ARMulator RDP comms code: ARM6 Instruction Emulator.
2 Copyright (C) 1994 Advanced RISC Machines Ltd.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
18 /*****************************************************************/
19 /* The Parent process continues here... */
20 /* It waits on the socket and passes on RDP messages down a pipe */
21 /* to the ARMulator RDP to RDI interpreter. */
22 /*****************************************************************/
25 #include <sys/types.h>
30 #include "communicate.h"
32 /* The socket to the debugger */
35 /* The pipes between the two processes */
39 /* A pipe for handling SWI return values that goes straight from the */
40 /* parent to the ARMulator host interface, bypassing the child's RDP */
41 /* to RDI interpreter */
42 extern int DebuggerARMul[2];
44 /* The maximum number of file descriptors */
47 /* The child process id. */
54 unsigned char message, CPnum, exreturn;
55 ARMword mask, nbytes, messagetype;
59 struct fd_set readfds;
62 fprintf (stderr, "parent ()...\n");
70 fprintf(stderr, "Arghh! What is going on?\n");
73 MYwrite_char(debugsock, RDP_Reset);
81 /* Wait either for the ARMulator or the debugger */
84 FD_SET (kidmum[0], &readfds); /* Wait for messages from ARMulator */
85 FD_SET (debugsock, &readfds); /* Wait for messages from debugger */
88 fprintf (stderr, "Waiting for ARMulator or debugger... ");
91 while ((i = select (nfds, &readfds, (fd_set *) 0, (fd_set *) 0, 0)) < 0)
97 fprintf(stderr, "(%d/2)", i);
100 if (FD_ISSET (debugsock, &readfds)) {
102 fprintf (stderr, "->debugger\n");
105 /* Inside this rather large if statement with simply pass on a complete
106 message to the ARMulator. The reason we need to pass messages on one
107 at a time is that we have to know whether the message is an OSOpReply
108 or an info(stop), so that we can take different action in those
111 if (MYread_char (debugsock, &message))
117 /* Open and/or Initialise */
119 fprintf (stderr, "RDP Open\n");
121 if (MYread_char(debugsock, &c)) /* type */
124 if (MYread_word(debugsock, &x)) /* memory size */
127 MYwrite_char (mumkid[1], message);
128 MYwrite_char (mumkid[1], c);
129 MYwrite_word (mumkid[1], x);
132 passon (debugsock, mumkid[1], 1); /* speed */
137 /* Close and Finalise */
139 fprintf(stderr, "RDP Close\n");
141 MYwrite_char (mumkid[1], message);
145 /* Read Memory Address */
147 fprintf (stderr, "RDP Read Memory\n");
149 MYwrite_char (mumkid[1], message);
150 if (passon (debugsock, mumkid[1], 4))
151 goto panic_error; /* address */
152 if (MYread_word(debugsock, &nbytes))
153 goto panic_error; /* nbytes */
154 MYwrite_word (mumkid[1], nbytes);
158 /* Write Memory Address */
160 fprintf (stderr, "RDP Write Memory\n");
162 if (MYread_word (debugsock, &x))
163 goto panic_error; /* address */
165 if (MYread_word (debugsock, &y))
166 goto panic_error; /* nbytes */
168 MYwrite_char (mumkid[1], message);
169 MYwrite_word (mumkid[1], x);
170 MYwrite_word (mumkid[1], y);
171 passon (debugsock, mumkid[1], y); /* actual data */
177 fprintf (stderr, "RDP Read CPU\n");
179 if (MYread_char(debugsock, &c))
180 goto panic_error; /* mode */
182 if (MYread_word (debugsock, &mask))
183 goto panic_error; /* mask */
185 MYwrite_char (mumkid[1], message);
186 MYwrite_char (mumkid[1], c);
187 MYwrite_word (mumkid[1], mask);
191 /* Write CPU State */
193 fprintf (stderr, "RDP Write CPU\n");
195 if (MYread_char (debugsock, &c))
196 goto panic_error; /* mode */
198 if (MYread_word (debugsock, &x))
199 goto panic_error; /* mask */
201 MYwrite_char (mumkid[1], message);
202 MYwrite_char (mumkid[1], c);
203 MYwrite_word (mumkid[1], x);
204 for (k = 1, j = 0; k != 0x80000000; k *= 2, j++)
206 && passon(debugsock, mumkid[1], 4))
211 /* Read Co-Processor State */
213 fprintf (stderr, "RDP Read CP state\n");
215 if (MYread_char (debugsock, &CPnum))
218 if (MYread_word (debugsock, &mask))
221 MYwrite_char (mumkid[1], message);
222 MYwrite_char (mumkid[1], CPnum);
223 MYwrite_word (mumkid[1], mask);
227 /* Write Co-Processor State */
229 fprintf(stderr, "RDP Write CP state\n");
231 if (MYread_char (debugsock, &CPnum))
234 if (MYread_word (debugsock, &mask))
237 MYwrite_char (mumkid[1], message);
238 MYwrite_char (mumkid[1], c);
239 MYwrite_char (mumkid[1], x);
240 for (k = 1, j = 0; k != 0x80000000; k *= 2, j++)
243 if ((c == 1 || c == 2) && k <= 128)
245 /* FP register = 12 bytes + 4 bytes format */
246 if (passon(debugsock, mumkid[1], 16))
251 /* Normal register = 4 bytes */
252 if (passon(debugsock, mumkid[1], 4))
261 fprintf (stderr, "RDP Set Breakpoint\n");
263 if (MYread_word (debugsock, &x))
264 goto panic_error; /* address */
266 if (MYread_char (debugsock, &c))
267 goto panic_error; /* type */
269 MYwrite_char (mumkid[1], message);
270 MYwrite_word (mumkid[1], x);
271 MYwrite_char (mumkid[1], c);
273 && passon(debugsock, mumkid[1], 4))
274 goto panic_error; /* bound */
278 /* Clear Breakpoint */
280 fprintf (stderr, "RDP Clear Breakpoint\n");
282 MYwrite_char (mumkid[1], message);
283 if (passon (debugsock, mumkid[1], 4))
284 goto panic_error; /* point */
290 fprintf (stderr, "RDP Set Watchpoint\n");
292 if (MYread_word (debugsock, &x))
293 goto panic_error; /* address */
295 if (MYread_char(debugsock, &c))
296 goto panic_error; /* type */
298 if (MYread_char (debugsock, &d))
299 goto panic_error; /* datatype */
301 MYwrite_char (mumkid[1], message);
302 MYwrite_word (mumkid[1], x);
303 MYwrite_char (mumkid[1], c);
304 MYwrite_char (mumkid[1], d);
306 && passon(debugsock, mumkid[1], 4))
307 goto panic_error; /* bound */
311 /* Clear Watchpoint */
313 fprintf (stderr, "RDP Clear Watchpoint\n");
315 MYwrite_char (mumkid[1], message);
316 if (passon (debugsock, mumkid[1], 4))
317 goto panic_error; /* point */
323 fprintf (stderr, "RDP Execute\n");
326 /* LEAVE THIS ONE 'TIL LATER... */
327 /* NEED TO WORK THINGS OUT */
329 /* NO ASCYNCHROUS RUNNING */
331 if (MYread_char(debugsock, &c))
332 goto panic_error; /* return */
334 /* Remember incase bit 7 is set and we have to send back a word */
337 MYwrite_char(mumkid[1], message);
338 MYwrite_char(mumkid[1], c);
344 fprintf (stderr, "RDP Step\n");
347 if (MYread_char(debugsock, &c))
348 goto panic_error; /* return */
350 if (MYread_word(debugsock, &x))
351 goto panic_error; /* ninstr */
353 MYwrite_char (mumkid[1], message);
354 MYwrite_char (mumkid[1], c);
355 MYwrite_word (mumkid[1], x);
361 fprintf (stderr, "RDP Info\n");
363 /* INFO TARGET, SET RDI LEVEL */
364 if (MYread_word (debugsock, &messagetype))
365 goto panic_error; /* info */
370 MYwrite_char (mumkid[1], message);
371 MYwrite_word (mumkid[1], messagetype);
374 case RDISet_RDILevel:
375 MYwrite_char (mumkid[1], message);
376 MYwrite_word (mumkid[1], messagetype);
377 if (passon (debugsock, mumkid[1], 1))
378 goto panic_error; /* argument */
382 /* Got to pass on a string argument */
383 MYwrite_char (mumkid[1], message);
384 MYwrite_word (mumkid[1], messagetype);
387 if (MYread_char (debugsock, &c))
390 MYwrite_char (mumkid[1], c);
395 kill (child, SIGUSR1);
396 MYwrite_char (debugsock, RDP_Return);
397 MYwrite_char (debugsock, RDIError_UserInterrupt);
400 case RDIVector_Catch:
401 MYread_word (debugsock, &x);
402 MYwrite_char (mumkid[1], message);
403 MYwrite_word (mumkid[1], messagetype);
404 MYwrite_word (mumkid[1], x);
408 MYwrite_char (mumkid[1], message);
409 MYwrite_word (mumkid[1], messagetype);
413 MYwrite_char (mumkid[1], message);
414 MYwrite_word (mumkid[1], messagetype);
418 fprintf (stderr, "Unrecognized RDIInfo request %d\n",
425 /* OS Operation Reply */
427 fprintf (stderr, "RDP OS Reply\n");
429 MYwrite_char (mumkid[1], message);
430 if (MYread_char (debugsock, &message))
432 MYwrite_char (mumkid[1], message);
435 case 0: /* return value i.e. nothing else.*/
438 case 1: /* returns a byte... */
439 if (MYread_char(debugsock, &c))
442 MYwrite_char (mumkid[1], c);
445 case 2: /* returns a word... */
446 if (MYread_word(debugsock, &x))
449 MYwrite_word (mumkid[1], x);
457 fprintf (stderr, "RDP Reset\n");
459 MYwrite_char (mumkid[1], message);
463 /* Hmm.. bad RDP operation */
464 fprintf (stderr, "RDP Bad RDP request (%d)\n", message);
465 MYwrite_char (debugsock, RDP_Return);
466 MYwrite_char (debugsock, RDIError_UnimplementedMessage);
471 if (FD_ISSET (kidmum[0], &readfds))
474 fprintf (stderr, "->ARMulator\n");
476 /* Anything we get from the ARMulator has to go to the debugger... */
477 /* It is that simple! */
479 passon (kidmum[0], debugsock, 1);