Commit | Line | Data |
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c906108c SS |
1 | /* Low level interface to ptrace, for the remote server for GDB. |
2 | Copyright (C) 1986, 1987, 1993 Free Software Foundation, Inc. | |
3 | ||
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
c906108c | 10 | |
c5aa993b JM |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
c906108c | 15 | |
c5aa993b JM |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
20 | |
21 | #include "server.h" | |
22 | #include "frame.h" | |
23 | #include "inferior.h" | |
24 | ||
25 | #include <stdio.h> | |
26 | #include <sys/param.h> | |
27 | #include <sys/dir.h> | |
28 | #define LYNXOS | |
29 | #include <sys/mem.h> | |
30 | #include <sys/signal.h> | |
31 | #include <sys/file.h> | |
32 | #include <sys/kernel.h> | |
33 | #ifndef __LYNXOS | |
34 | #define __LYNXOS | |
35 | #endif | |
36 | #include <sys/itimer.h> | |
37 | #include <sys/time.h> | |
38 | #include <sys/resource.h> | |
39 | #include <sys/proc.h> | |
40 | #include <signal.h> | |
41 | #include <sys/ioctl.h> | |
42 | #include <sgtty.h> | |
43 | #include <fcntl.h> | |
44 | #include <sys/wait.h> | |
45 | #include <sys/fpp.h> | |
46 | ||
47 | char registers[REGISTER_BYTES]; | |
48 | ||
49 | #include <sys/ptrace.h> | |
50 | ||
51 | /* Start an inferior process and returns its pid. | |
52 | ALLARGS is a vector of program-name and args. */ | |
53 | ||
54 | int | |
55 | create_inferior (program, allargs) | |
56 | char *program; | |
57 | char **allargs; | |
58 | { | |
59 | int pid; | |
60 | ||
61 | pid = fork (); | |
62 | if (pid < 0) | |
63 | perror_with_name ("fork"); | |
64 | ||
65 | if (pid == 0) | |
66 | { | |
67 | int pgrp; | |
68 | ||
69 | /* Switch child to it's own process group so that signals won't | |
c5aa993b | 70 | directly affect gdbserver. */ |
c906108c | 71 | |
c5aa993b JM |
72 | pgrp = getpid (); |
73 | setpgrp (0, pgrp); | |
c906108c SS |
74 | ioctl (0, TIOCSPGRP, &pgrp); |
75 | ||
c5aa993b | 76 | ptrace (PTRACE_TRACEME, 0, (PTRACE_ARG3_TYPE) 0, 0); |
c906108c SS |
77 | |
78 | execv (program, allargs); | |
79 | ||
80 | fprintf (stderr, "GDBserver (process %d): Cannot exec %s: %s.\n", | |
c5aa993b | 81 | getpid (), program, |
c906108c SS |
82 | errno < sys_nerr ? sys_errlist[errno] : "unknown error"); |
83 | fflush (stderr); | |
84 | _exit (0177); | |
85 | } | |
86 | ||
87 | return pid; | |
88 | } | |
89 | ||
90 | /* Kill the inferior process. Make us have no inferior. */ | |
91 | ||
92 | void | |
93 | kill_inferior () | |
94 | { | |
95 | if (inferior_pid == 0) | |
96 | return; | |
97 | ptrace (PTRACE_KILL, inferior_pid, 0, 0); | |
98 | wait (0); | |
99 | ||
100 | inferior_pid = 0; | |
101 | } | |
102 | ||
103 | /* Return nonzero if the given thread is still alive. */ | |
104 | int | |
105 | mythread_alive (pid) | |
106 | int pid; | |
107 | { | |
108 | /* Arggh. Apparently pthread_kill only works for threads within | |
109 | the process that calls pthread_kill. | |
110 | ||
111 | We want to avoid the lynx signal extensions as they simply don't | |
112 | map well to the generic gdb interface we want to keep. | |
113 | ||
114 | All we want to do is determine if a particular thread is alive; | |
115 | it appears as if we can just make a harmless thread specific | |
116 | ptrace call to do that. */ | |
117 | return (ptrace (PTRACE_THREADUSER, | |
118 | BUILDPID (PIDGET (inferior_pid), pid), 0, 0) != -1); | |
119 | } | |
120 | ||
121 | /* Wait for process, returns status */ | |
122 | ||
123 | unsigned char | |
124 | mywait (status) | |
125 | char *status; | |
126 | { | |
127 | int pid; | |
128 | union wait w; | |
129 | ||
130 | while (1) | |
131 | { | |
c5aa993b | 132 | enable_async_io (); |
c906108c SS |
133 | |
134 | pid = wait (&w); | |
135 | ||
c5aa993b | 136 | disable_async_io (); |
c906108c | 137 | |
c5aa993b | 138 | if (pid != PIDGET (inferior_pid)) |
c906108c SS |
139 | perror_with_name ("wait"); |
140 | ||
141 | thread_from_wait = w.w_tid; | |
142 | inferior_pid = BUILDPID (inferior_pid, w.w_tid); | |
143 | ||
c5aa993b JM |
144 | if (WIFSTOPPED (w) |
145 | && WSTOPSIG (w) == SIGTRAP) | |
c906108c SS |
146 | { |
147 | int realsig; | |
148 | ||
149 | realsig = ptrace (PTRACE_GETTRACESIG, inferior_pid, | |
c5aa993b | 150 | (PTRACE_ARG3_TYPE) 0, 0); |
c906108c SS |
151 | |
152 | if (realsig == SIGNEWTHREAD) | |
153 | { | |
154 | /* It's a new thread notification. Nothing to do here since | |
c5aa993b JM |
155 | the machine independent code in wait_for_inferior will |
156 | add the thread to the thread list and restart the thread | |
157 | when pid != inferior_pid and pid is not in the thread list. | |
158 | We don't even want to muck with realsig -- the code in | |
159 | wait_for_inferior expects SIGTRAP. */ | |
c906108c SS |
160 | ; |
161 | } | |
162 | } | |
163 | break; | |
164 | } | |
165 | ||
166 | if (WIFEXITED (w)) | |
167 | { | |
168 | *status = 'W'; | |
169 | return ((unsigned char) WEXITSTATUS (w)); | |
170 | } | |
171 | else if (!WIFSTOPPED (w)) | |
172 | { | |
173 | *status = 'X'; | |
174 | return ((unsigned char) WTERMSIG (w)); | |
175 | } | |
176 | ||
177 | fetch_inferior_registers (0); | |
178 | ||
179 | *status = 'T'; | |
180 | return ((unsigned char) WSTOPSIG (w)); | |
181 | } | |
182 | ||
183 | /* Resume execution of the inferior process. | |
184 | If STEP is nonzero, single-step it. | |
185 | If SIGNAL is nonzero, give it that signal. */ | |
186 | ||
187 | void | |
188 | myresume (step, signal) | |
189 | int step; | |
190 | int signal; | |
191 | { | |
192 | errno = 0; | |
193 | ptrace (step ? PTRACE_SINGLESTEP_ONE : PTRACE_CONT, | |
194 | BUILDPID (inferior_pid, cont_thread == -1 ? 0 : cont_thread), | |
195 | 1, signal); | |
196 | if (errno) | |
197 | perror_with_name ("ptrace"); | |
198 | } | |
199 | ||
200 | #undef offsetof | |
201 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
202 | ||
203 | /* Mapping between GDB register #s and offsets into econtext. Must be | |
204 | consistent with REGISTER_NAMES macro in various tmXXX.h files. */ | |
205 | ||
206 | #define X(ENTRY)(offsetof(struct econtext, ENTRY)) | |
207 | ||
208 | #ifdef I386 | |
209 | /* Mappings from tm-i386v.h */ | |
210 | ||
211 | static int regmap[] = | |
212 | { | |
c5aa993b JM |
213 | X (eax), |
214 | X (ecx), | |
215 | X (edx), | |
216 | X (ebx), | |
217 | X (esp), /* sp */ | |
218 | X (ebp), /* fp */ | |
219 | X (esi), | |
220 | X (edi), | |
221 | X (eip), /* pc */ | |
222 | X (flags), /* ps */ | |
223 | X (cs), | |
224 | X (ss), | |
225 | X (ds), | |
226 | X (es), | |
227 | X (ecode), /* Lynx doesn't give us either fs or gs, so */ | |
228 | X (fault), /* we just substitute these two in the hopes | |
c906108c SS |
229 | that they are useful. */ |
230 | }; | |
231 | #endif | |
232 | ||
233 | #ifdef M68K | |
234 | /* Mappings from tm-m68k.h */ | |
235 | ||
236 | static int regmap[] = | |
237 | { | |
c5aa993b JM |
238 | X (regs[0]), /* d0 */ |
239 | X (regs[1]), /* d1 */ | |
240 | X (regs[2]), /* d2 */ | |
241 | X (regs[3]), /* d3 */ | |
242 | X (regs[4]), /* d4 */ | |
243 | X (regs[5]), /* d5 */ | |
244 | X (regs[6]), /* d6 */ | |
245 | X (regs[7]), /* d7 */ | |
246 | X (regs[8]), /* a0 */ | |
247 | X (regs[9]), /* a1 */ | |
248 | X (regs[10]), /* a2 */ | |
249 | X (regs[11]), /* a3 */ | |
250 | X (regs[12]), /* a4 */ | |
251 | X (regs[13]), /* a5 */ | |
252 | X (regs[14]), /* fp */ | |
c906108c | 253 | 0, /* sp */ |
c5aa993b JM |
254 | X (status), /* ps */ |
255 | X (pc), | |
256 | ||
257 | X (fregs[0 * 3]), /* fp0 */ | |
258 | X (fregs[1 * 3]), /* fp1 */ | |
259 | X (fregs[2 * 3]), /* fp2 */ | |
260 | X (fregs[3 * 3]), /* fp3 */ | |
261 | X (fregs[4 * 3]), /* fp4 */ | |
262 | X (fregs[5 * 3]), /* fp5 */ | |
263 | X (fregs[6 * 3]), /* fp6 */ | |
264 | X (fregs[7 * 3]), /* fp7 */ | |
265 | ||
266 | X (fcregs[0]), /* fpcontrol */ | |
267 | X (fcregs[1]), /* fpstatus */ | |
268 | X (fcregs[2]), /* fpiaddr */ | |
269 | X (ssw), /* fpcode */ | |
270 | X (fault), /* fpflags */ | |
c906108c SS |
271 | }; |
272 | #endif | |
273 | ||
274 | #ifdef SPARC | |
275 | /* Mappings from tm-sparc.h */ | |
276 | ||
277 | #define FX(ENTRY)(offsetof(struct fcontext, ENTRY)) | |
278 | ||
279 | static int regmap[] = | |
280 | { | |
281 | -1, /* g0 */ | |
c5aa993b JM |
282 | X (g1), |
283 | X (g2), | |
284 | X (g3), | |
285 | X (g4), | |
c906108c SS |
286 | -1, /* g5->g7 aren't saved by Lynx */ |
287 | -1, | |
288 | -1, | |
289 | ||
c5aa993b JM |
290 | X (o[0]), |
291 | X (o[1]), | |
292 | X (o[2]), | |
293 | X (o[3]), | |
294 | X (o[4]), | |
295 | X (o[5]), | |
296 | X (o[6]), /* sp */ | |
297 | X (o[7]), /* ra */ | |
298 | ||
299 | -1, -1, -1, -1, -1, -1, -1, -1, /* l0 -> l7 */ | |
300 | ||
301 | -1, -1, -1, -1, -1, -1, -1, -1, /* i0 -> i7 */ | |
302 | ||
303 | FX (f.fregs[0]), /* f0 */ | |
304 | FX (f.fregs[1]), | |
305 | FX (f.fregs[2]), | |
306 | FX (f.fregs[3]), | |
307 | FX (f.fregs[4]), | |
308 | FX (f.fregs[5]), | |
309 | FX (f.fregs[6]), | |
310 | FX (f.fregs[7]), | |
311 | FX (f.fregs[8]), | |
312 | FX (f.fregs[9]), | |
313 | FX (f.fregs[10]), | |
314 | FX (f.fregs[11]), | |
315 | FX (f.fregs[12]), | |
316 | FX (f.fregs[13]), | |
317 | FX (f.fregs[14]), | |
318 | FX (f.fregs[15]), | |
319 | FX (f.fregs[16]), | |
320 | FX (f.fregs[17]), | |
321 | FX (f.fregs[18]), | |
322 | FX (f.fregs[19]), | |
323 | FX (f.fregs[20]), | |
324 | FX (f.fregs[21]), | |
325 | FX (f.fregs[22]), | |
326 | FX (f.fregs[23]), | |
327 | FX (f.fregs[24]), | |
328 | FX (f.fregs[25]), | |
329 | FX (f.fregs[26]), | |
330 | FX (f.fregs[27]), | |
331 | FX (f.fregs[28]), | |
332 | FX (f.fregs[29]), | |
333 | FX (f.fregs[30]), | |
334 | FX (f.fregs[31]), | |
335 | ||
336 | X (y), | |
337 | X (psr), | |
338 | X (wim), | |
339 | X (tbr), | |
340 | X (pc), | |
341 | X (npc), | |
342 | FX (fsr), /* fpsr */ | |
c906108c SS |
343 | -1, /* cpsr */ |
344 | }; | |
345 | #endif | |
346 | ||
347 | #ifdef SPARC | |
348 | ||
349 | /* This routine handles some oddball cases for Sparc registers and LynxOS. | |
350 | In partucular, it causes refs to G0, g5->7, and all fp regs to return zero. | |
351 | It also handles knows where to find the I & L regs on the stack. */ | |
352 | ||
353 | void | |
354 | fetch_inferior_registers (regno) | |
355 | int regno; | |
356 | { | |
357 | #if 0 | |
358 | int whatregs = 0; | |
359 | ||
360 | #define WHATREGS_FLOAT 1 | |
361 | #define WHATREGS_GEN 2 | |
362 | #define WHATREGS_STACK 4 | |
363 | ||
364 | if (regno == -1) | |
365 | whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; | |
366 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
367 | whatregs = WHATREGS_STACK; | |
368 | else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
369 | whatregs = WHATREGS_FLOAT; | |
370 | else | |
371 | whatregs = WHATREGS_GEN; | |
372 | ||
373 | if (whatregs & WHATREGS_GEN) | |
374 | { | |
c5aa993b | 375 | struct econtext ec; /* general regs */ |
c906108c SS |
376 | char buf[MAX_REGISTER_RAW_SIZE]; |
377 | int retval; | |
378 | int i; | |
379 | ||
380 | errno = 0; | |
381 | retval = ptrace (PTRACE_GETREGS, | |
382 | BUILDPID (inferior_pid, general_thread), | |
c5aa993b | 383 | (PTRACE_ARG3_TYPE) & ec, |
c906108c SS |
384 | 0); |
385 | if (errno) | |
386 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
c5aa993b | 387 | |
c906108c SS |
388 | memset (buf, 0, REGISTER_RAW_SIZE (G0_REGNUM)); |
389 | supply_register (G0_REGNUM, buf); | |
c5aa993b | 390 | supply_register (TBR_REGNUM, (char *) &ec.tbr); |
c906108c SS |
391 | |
392 | memcpy (®isters[REGISTER_BYTE (G1_REGNUM)], &ec.g1, | |
393 | 4 * REGISTER_RAW_SIZE (G1_REGNUM)); | |
394 | for (i = G1_REGNUM; i <= G1_REGNUM + 3; i++) | |
395 | register_valid[i] = 1; | |
396 | ||
c5aa993b JM |
397 | supply_register (PS_REGNUM, (char *) &ec.psr); |
398 | supply_register (Y_REGNUM, (char *) &ec.y); | |
399 | supply_register (PC_REGNUM, (char *) &ec.pc); | |
400 | supply_register (NPC_REGNUM, (char *) &ec.npc); | |
401 | supply_register (WIM_REGNUM, (char *) &ec.wim); | |
c906108c SS |
402 | |
403 | memcpy (®isters[REGISTER_BYTE (O0_REGNUM)], ec.o, | |
404 | 8 * REGISTER_RAW_SIZE (O0_REGNUM)); | |
405 | for (i = O0_REGNUM; i <= O0_REGNUM + 7; i++) | |
406 | register_valid[i] = 1; | |
407 | } | |
408 | ||
409 | if (whatregs & WHATREGS_STACK) | |
410 | { | |
411 | CORE_ADDR sp; | |
412 | int i; | |
413 | ||
414 | sp = read_register (SP_REGNUM); | |
415 | ||
416 | target_xfer_memory (sp + FRAME_SAVED_I0, | |
c5aa993b | 417 | ®isters[REGISTER_BYTE (I0_REGNUM)], |
c906108c SS |
418 | 8 * REGISTER_RAW_SIZE (I0_REGNUM), 0); |
419 | for (i = I0_REGNUM; i <= I7_REGNUM; i++) | |
420 | register_valid[i] = 1; | |
421 | ||
422 | target_xfer_memory (sp + FRAME_SAVED_L0, | |
c5aa993b | 423 | ®isters[REGISTER_BYTE (L0_REGNUM)], |
c906108c SS |
424 | 8 * REGISTER_RAW_SIZE (L0_REGNUM), 0); |
425 | for (i = L0_REGNUM; i <= L0_REGNUM + 7; i++) | |
426 | register_valid[i] = 1; | |
427 | } | |
428 | ||
429 | if (whatregs & WHATREGS_FLOAT) | |
430 | { | |
c5aa993b | 431 | struct fcontext fc; /* fp regs */ |
c906108c SS |
432 | int retval; |
433 | int i; | |
434 | ||
435 | errno = 0; | |
c5aa993b | 436 | retval = ptrace (PTRACE_GETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, |
c906108c SS |
437 | 0); |
438 | if (errno) | |
439 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
c5aa993b | 440 | |
c906108c SS |
441 | memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fc.f.fregs, |
442 | 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); | |
443 | for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) | |
444 | register_valid[i] = 1; | |
445 | ||
c5aa993b | 446 | supply_register (FPS_REGNUM, (char *) &fc.fsr); |
c906108c SS |
447 | } |
448 | #endif | |
449 | } | |
450 | ||
451 | /* This routine handles storing of the I & L regs for the Sparc. The trick | |
452 | here is that they actually live on the stack. The really tricky part is | |
453 | that when changing the stack pointer, the I & L regs must be written to | |
454 | where the new SP points, otherwise the regs will be incorrect when the | |
455 | process is started up again. We assume that the I & L regs are valid at | |
456 | this point. */ | |
457 | ||
458 | void | |
459 | store_inferior_registers (regno) | |
460 | int regno; | |
461 | { | |
462 | #if 0 | |
463 | int whatregs = 0; | |
464 | ||
465 | if (regno == -1) | |
466 | whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; | |
467 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
468 | whatregs = WHATREGS_STACK; | |
469 | else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
470 | whatregs = WHATREGS_FLOAT; | |
471 | else if (regno == SP_REGNUM) | |
472 | whatregs = WHATREGS_STACK | WHATREGS_GEN; | |
473 | else | |
474 | whatregs = WHATREGS_GEN; | |
475 | ||
476 | if (whatregs & WHATREGS_GEN) | |
477 | { | |
c5aa993b | 478 | struct econtext ec; /* general regs */ |
c906108c SS |
479 | int retval; |
480 | ||
481 | ec.tbr = read_register (TBR_REGNUM); | |
482 | memcpy (&ec.g1, ®isters[REGISTER_BYTE (G1_REGNUM)], | |
483 | 4 * REGISTER_RAW_SIZE (G1_REGNUM)); | |
484 | ||
485 | ec.psr = read_register (PS_REGNUM); | |
486 | ec.y = read_register (Y_REGNUM); | |
487 | ec.pc = read_register (PC_REGNUM); | |
488 | ec.npc = read_register (NPC_REGNUM); | |
489 | ec.wim = read_register (WIM_REGNUM); | |
490 | ||
491 | memcpy (ec.o, ®isters[REGISTER_BYTE (O0_REGNUM)], | |
492 | 8 * REGISTER_RAW_SIZE (O0_REGNUM)); | |
493 | ||
494 | errno = 0; | |
c5aa993b | 495 | retval = ptrace (PTRACE_SETREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & ec, |
c906108c SS |
496 | 0); |
497 | if (errno) | |
498 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
499 | } | |
500 | ||
501 | if (whatregs & WHATREGS_STACK) | |
502 | { | |
503 | int regoffset; | |
504 | CORE_ADDR sp; | |
505 | ||
506 | sp = read_register (SP_REGNUM); | |
507 | ||
508 | if (regno == -1 || regno == SP_REGNUM) | |
509 | { | |
c5aa993b JM |
510 | if (!register_valid[L0_REGNUM + 5]) |
511 | abort (); | |
c906108c SS |
512 | target_xfer_memory (sp + FRAME_SAVED_I0, |
513 | ®isters[REGISTER_BYTE (I0_REGNUM)], | |
514 | 8 * REGISTER_RAW_SIZE (I0_REGNUM), 1); | |
515 | ||
516 | target_xfer_memory (sp + FRAME_SAVED_L0, | |
517 | ®isters[REGISTER_BYTE (L0_REGNUM)], | |
518 | 8 * REGISTER_RAW_SIZE (L0_REGNUM), 1); | |
519 | } | |
520 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
521 | { | |
522 | if (!register_valid[regno]) | |
c5aa993b | 523 | abort (); |
c906108c SS |
524 | if (regno >= L0_REGNUM && regno <= L0_REGNUM + 7) |
525 | regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM) | |
526 | + FRAME_SAVED_L0; | |
527 | else | |
528 | regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (I0_REGNUM) | |
529 | + FRAME_SAVED_I0; | |
530 | target_xfer_memory (sp + regoffset, ®isters[REGISTER_BYTE (regno)], | |
531 | REGISTER_RAW_SIZE (regno), 1); | |
532 | } | |
533 | } | |
534 | ||
535 | if (whatregs & WHATREGS_FLOAT) | |
536 | { | |
c5aa993b | 537 | struct fcontext fc; /* fp regs */ |
c906108c SS |
538 | int retval; |
539 | ||
540 | /* We read fcontext first so that we can get good values for fq_t... */ | |
541 | errno = 0; | |
c5aa993b | 542 | retval = ptrace (PTRACE_GETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, |
c906108c SS |
543 | 0); |
544 | if (errno) | |
545 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
c5aa993b | 546 | |
c906108c SS |
547 | memcpy (fc.f.fregs, ®isters[REGISTER_BYTE (FP0_REGNUM)], |
548 | 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); | |
549 | ||
550 | fc.fsr = read_register (FPS_REGNUM); | |
551 | ||
552 | errno = 0; | |
c5aa993b | 553 | retval = ptrace (PTRACE_SETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, |
c906108c SS |
554 | 0); |
555 | if (errno) | |
556 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
c5aa993b | 557 | } |
c906108c SS |
558 | #endif |
559 | } | |
560 | #endif /* SPARC */ | |
561 | ||
562 | #ifndef SPARC | |
563 | ||
564 | /* Return the offset relative to the start of the per-thread data to the | |
565 | saved context block. */ | |
566 | ||
567 | static unsigned long | |
c5aa993b | 568 | lynx_registers_addr () |
c906108c SS |
569 | { |
570 | CORE_ADDR stblock; | |
c5aa993b | 571 | int ecpoff = offsetof (st_t, ecp); |
c906108c SS |
572 | CORE_ADDR ecp; |
573 | ||
574 | errno = 0; | |
575 | stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, BUILDPID (inferior_pid, general_thread), | |
c5aa993b | 576 | (PTRACE_ARG3_TYPE) 0, 0); |
c906108c SS |
577 | if (errno) |
578 | perror_with_name ("PTRACE_THREADUSER"); | |
579 | ||
580 | ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, BUILDPID (inferior_pid, general_thread), | |
c5aa993b | 581 | (PTRACE_ARG3_TYPE) ecpoff, 0); |
c906108c SS |
582 | if (errno) |
583 | perror_with_name ("lynx_registers_addr(PTRACE_PEEKTHREAD)"); | |
584 | ||
585 | return ecp - stblock; | |
586 | } | |
587 | ||
588 | /* Fetch one or more registers from the inferior. REGNO == -1 to get | |
589 | them all. We actually fetch more than requested, when convenient, | |
590 | marking them as valid so we won't fetch them again. */ | |
591 | ||
592 | void | |
593 | fetch_inferior_registers (ignored) | |
594 | int ignored; | |
595 | { | |
596 | int regno; | |
597 | unsigned long reg; | |
598 | unsigned long ecp; | |
599 | ||
c5aa993b | 600 | ecp = lynx_registers_addr (); |
c906108c SS |
601 | |
602 | for (regno = 0; regno < NUM_REGS; regno++) | |
603 | { | |
604 | int ptrace_fun = PTRACE_PEEKTHREAD; | |
605 | ||
606 | #ifdef PTRACE_PEEKUSP | |
607 | ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD; | |
608 | #endif | |
609 | ||
610 | errno = 0; | |
611 | reg = ptrace (ptrace_fun, BUILDPID (inferior_pid, general_thread), | |
612 | (PTRACE_ARG3_TYPE) (ecp + regmap[regno]), 0); | |
613 | if (errno) | |
614 | perror_with_name ("fetch_inferior_registers(PTRACE_PEEKTHREAD)"); | |
c5aa993b JM |
615 | |
616 | *(unsigned long *) ®isters[REGISTER_BYTE (regno)] = reg; | |
c906108c SS |
617 | } |
618 | } | |
619 | ||
620 | /* Store our register values back into the inferior. | |
621 | If REGNO is -1, do this for all registers. | |
622 | Otherwise, REGNO specifies which register (so we can save time). */ | |
623 | ||
624 | void | |
625 | store_inferior_registers (ignored) | |
626 | int ignored; | |
627 | { | |
628 | int regno; | |
629 | unsigned long reg; | |
630 | unsigned long ecp; | |
631 | ||
c5aa993b | 632 | ecp = lynx_registers_addr (); |
c906108c SS |
633 | |
634 | for (regno = 0; regno < NUM_REGS; regno++) | |
635 | { | |
636 | int ptrace_fun = PTRACE_POKEUSER; | |
637 | ||
638 | #ifdef PTRACE_POKEUSP | |
639 | ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER; | |
640 | #endif | |
641 | ||
c5aa993b | 642 | reg = *(unsigned long *) ®isters[REGISTER_BYTE (regno)]; |
c906108c SS |
643 | |
644 | errno = 0; | |
645 | ptrace (ptrace_fun, BUILDPID (inferior_pid, general_thread), | |
646 | (PTRACE_ARG3_TYPE) (ecp + regmap[regno]), reg); | |
647 | if (errno) | |
648 | perror_with_name ("PTRACE_POKEUSER"); | |
649 | } | |
650 | } | |
651 | ||
652 | #endif /* ! SPARC */ | |
653 | ||
654 | /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory | |
655 | in the NEW_SUN_PTRACE case. | |
656 | It ought to be straightforward. But it appears that writing did | |
657 | not write the data that I specified. I cannot understand where | |
658 | it got the data that it actually did write. */ | |
659 | ||
660 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
661 | to debugger memory starting at MYADDR. */ | |
662 | ||
663 | void | |
664 | read_inferior_memory (memaddr, myaddr, len) | |
665 | CORE_ADDR memaddr; | |
666 | char *myaddr; | |
667 | int len; | |
668 | { | |
669 | register int i; | |
670 | /* Round starting address down to longword boundary. */ | |
671 | register CORE_ADDR addr = memaddr & -sizeof (int); | |
672 | /* Round ending address up; get number of longwords that makes. */ | |
673 | register int count | |
674 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
675 | /* Allocate buffer of that many longwords. */ | |
676 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
677 | ||
678 | /* Read all the longwords */ | |
679 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
680 | { | |
681 | buffer[i] = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), addr, 0); | |
682 | } | |
683 | ||
684 | /* Copy appropriate bytes out of the buffer. */ | |
685 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
686 | } | |
687 | ||
688 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
689 | to inferior's memory at MEMADDR. | |
690 | On failure (cannot write the inferior) | |
691 | returns the value of errno. */ | |
692 | ||
693 | int | |
694 | write_inferior_memory (memaddr, myaddr, len) | |
695 | CORE_ADDR memaddr; | |
696 | char *myaddr; | |
697 | int len; | |
698 | { | |
699 | register int i; | |
700 | /* Round starting address down to longword boundary. */ | |
701 | register CORE_ADDR addr = memaddr & -sizeof (int); | |
702 | /* Round ending address up; get number of longwords that makes. */ | |
703 | register int count | |
704 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
705 | /* Allocate buffer of that many longwords. */ | |
706 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
707 | extern int errno; | |
708 | ||
709 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
710 | ||
711 | buffer[0] = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), addr, 0); | |
712 | ||
713 | if (count > 1) | |
714 | { | |
715 | buffer[count - 1] | |
716 | = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), | |
717 | addr + (count - 1) * sizeof (int), 0); | |
718 | } | |
719 | ||
720 | /* Copy data to be written over corresponding part of buffer */ | |
721 | ||
722 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); | |
723 | ||
724 | /* Write the entire buffer. */ | |
725 | ||
726 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
727 | { | |
728 | while (1) | |
729 | { | |
730 | errno = 0; | |
731 | ptrace (PTRACE_POKETEXT, BUILDPID (inferior_pid, general_thread), addr, buffer[i]); | |
732 | if (errno) | |
733 | { | |
c5aa993b | 734 | fprintf (stderr, "\ |
c906108c | 735 | ptrace (PTRACE_POKETEXT): errno=%d, pid=0x%x, addr=0x%x, buffer[i] = 0x%x\n", |
c5aa993b JM |
736 | errno, BUILDPID (inferior_pid, general_thread), |
737 | addr, buffer[i]); | |
738 | fprintf (stderr, "Sleeping for 1 second\n"); | |
739 | sleep (1); | |
c906108c SS |
740 | } |
741 | else | |
742 | break; | |
743 | } | |
744 | } | |
745 | ||
746 | return 0; | |
747 | } |