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e20520b8 SG |
1 | /* Low level interface to ptrace, for the remote server for GDB. |
2 | Copyright (C) 1986, 1987, 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
41e170e2 | 20 | #include "server.h" |
e20520b8 SG |
21 | #include "frame.h" |
22 | #include "inferior.h" | |
e20520b8 SG |
23 | |
24 | #include <stdio.h> | |
25 | #include <sys/param.h> | |
26 | #include <sys/dir.h> | |
e20520b8 SG |
27 | #define LYNXOS |
28 | #include <sys/mem.h> | |
29 | #include <sys/signal.h> | |
30 | #include <sys/file.h> | |
31 | #include <sys/kernel.h> | |
b292fca8 SS |
32 | #ifndef __LYNXOS |
33 | #define __LYNXOS | |
34 | #endif | |
e20520b8 SG |
35 | #include <sys/itimer.h> |
36 | #include <sys/time.h> | |
37 | #include <sys/resource.h> | |
38 | #include <sys/proc.h> | |
39 | #include <signal.h> | |
40 | #include <sys/ioctl.h> | |
41 | #include <sgtty.h> | |
42 | #include <fcntl.h> | |
4c0b3e57 | 43 | #include <sys/wait.h> |
b292fca8 | 44 | #include <sys/fpp.h> |
e20520b8 | 45 | |
e20520b8 SG |
46 | char registers[REGISTER_BYTES]; |
47 | ||
e20520b8 | 48 | #include <sys/ptrace.h> |
e20520b8 SG |
49 | |
50 | /* Start an inferior process and returns its pid. | |
db691e4b | 51 | ALLARGS is a vector of program-name and args. */ |
e20520b8 SG |
52 | |
53 | int | |
f450d101 SG |
54 | create_inferior (program, allargs) |
55 | char *program; | |
e20520b8 | 56 | char **allargs; |
e20520b8 SG |
57 | { |
58 | int pid; | |
e20520b8 SG |
59 | |
60 | pid = fork (); | |
61 | if (pid < 0) | |
62 | perror_with_name ("fork"); | |
63 | ||
64 | if (pid == 0) | |
65 | { | |
db691e4b SG |
66 | int pgrp; |
67 | ||
68 | /* Switch child to it's own process group so that signals won't | |
69 | directly affect gdbserver. */ | |
70 | ||
71 | pgrp = getpid(); | |
72 | setpgrp(0, pgrp); | |
73 | ioctl (0, TIOCSPGRP, &pgrp); | |
74 | ||
d3006726 | 75 | ptrace (PTRACE_TRACEME, 0, (PTRACE_ARG3_TYPE)0, 0); |
e20520b8 | 76 | |
f450d101 | 77 | execv (program, allargs); |
e20520b8 | 78 | |
db691e4b SG |
79 | fprintf (stderr, "GDBserver (process %d): Cannot exec %s: %s.\n", |
80 | getpid(), program, | |
e20520b8 SG |
81 | errno < sys_nerr ? sys_errlist[errno] : "unknown error"); |
82 | fflush (stderr); | |
83 | _exit (0177); | |
84 | } | |
85 | ||
86 | return pid; | |
87 | } | |
88 | ||
89 | /* Kill the inferior process. Make us have no inferior. */ | |
90 | ||
91 | void | |
92 | kill_inferior () | |
93 | { | |
94 | if (inferior_pid == 0) | |
95 | return; | |
41e170e2 | 96 | ptrace (PTRACE_KILL, inferior_pid, 0, 0); |
e20520b8 | 97 | wait (0); |
41e170e2 SG |
98 | |
99 | inferior_pid = 0; | |
e20520b8 SG |
100 | } |
101 | ||
43fc25c8 JL |
102 | /* Return nonzero if the given thread is still alive. */ |
103 | int | |
104 | mythread_alive (pid) | |
105 | int pid; | |
106 | { | |
107 | /* Arggh. Apparently pthread_kill only works for threads within | |
108 | the process that calls pthread_kill. | |
109 | ||
110 | We want to avoid the lynx signal extensions as they simply don't | |
111 | map well to the generic gdb interface we want to keep. | |
112 | ||
113 | All we want to do is determine if a particular thread is alive; | |
114 | it appears as if we can just make a harmless thread specific | |
115 | ptrace call to do that. */ | |
116 | return (ptrace (PTRACE_THREADUSER, | |
117 | BUILDPID (PIDGET (inferior_pid), pid), 0, 0) != -1); | |
118 | } | |
119 | ||
e20520b8 SG |
120 | /* Wait for process, returns status */ |
121 | ||
122 | unsigned char | |
123 | mywait (status) | |
124 | char *status; | |
125 | { | |
126 | int pid; | |
127 | union wait w; | |
128 | ||
4cc1b3f7 JK |
129 | while (1) |
130 | { | |
131 | enable_async_io(); | |
132 | ||
133 | pid = wait (&w); | |
134 | ||
135 | disable_async_io(); | |
41e170e2 | 136 | |
4cc1b3f7 JK |
137 | if (pid != PIDGET(inferior_pid)) |
138 | perror_with_name ("wait"); | |
41e170e2 | 139 | |
4cc1b3f7 JK |
140 | thread_from_wait = w.w_tid; |
141 | inferior_pid = BUILDPID (inferior_pid, w.w_tid); | |
4cc1b3f7 JK |
142 | |
143 | if (WIFSTOPPED(w) | |
144 | && WSTOPSIG(w) == SIGTRAP) | |
145 | { | |
146 | int realsig; | |
41e170e2 | 147 | |
4cc1b3f7 JK |
148 | realsig = ptrace (PTRACE_GETTRACESIG, inferior_pid, |
149 | (PTRACE_ARG3_TYPE)0, 0); | |
e20520b8 | 150 | |
4cc1b3f7 JK |
151 | if (realsig == SIGNEWTHREAD) |
152 | { | |
43fc25c8 JL |
153 | /* It's a new thread notification. Nothing to do here since |
154 | the machine independent code in wait_for_inferior will | |
155 | add the thread to the thread list and restart the thread | |
156 | when pid != inferior_pid and pid is not in the thread list. | |
157 | We don't even want to muck with realsig -- the code in | |
158 | wait_for_inferior expects SIGTRAP. */ | |
159 | ; | |
4cc1b3f7 JK |
160 | } |
161 | } | |
162 | break; | |
163 | } | |
e20520b8 SG |
164 | |
165 | if (WIFEXITED (w)) | |
166 | { | |
4cc1b3f7 JK |
167 | *status = 'W'; |
168 | return ((unsigned char) WEXITSTATUS (w)); | |
e20520b8 SG |
169 | } |
170 | else if (!WIFSTOPPED (w)) | |
171 | { | |
4cc1b3f7 | 172 | *status = 'X'; |
e20520b8 SG |
173 | return ((unsigned char) WTERMSIG (w)); |
174 | } | |
175 | ||
176 | fetch_inferior_registers (0); | |
177 | ||
4cc1b3f7 | 178 | *status = 'T'; |
e20520b8 SG |
179 | return ((unsigned char) WSTOPSIG (w)); |
180 | } | |
181 | ||
182 | /* Resume execution of the inferior process. | |
183 | If STEP is nonzero, single-step it. | |
184 | If SIGNAL is nonzero, give it that signal. */ | |
185 | ||
186 | void | |
187 | myresume (step, signal) | |
188 | int step; | |
189 | int signal; | |
190 | { | |
191 | errno = 0; | |
4cc1b3f7 JK |
192 | ptrace (step ? PTRACE_SINGLESTEP_ONE : PTRACE_CONT, |
193 | BUILDPID (inferior_pid, cont_thread == -1 ? 0 : cont_thread), | |
194 | 1, signal); | |
e20520b8 SG |
195 | if (errno) |
196 | perror_with_name ("ptrace"); | |
197 | } | |
198 | ||
199 | #undef offsetof | |
200 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
201 | ||
9a13e99e SG |
202 | /* Mapping between GDB register #s and offsets into econtext. Must be |
203 | consistent with REGISTER_NAMES macro in various tmXXX.h files. */ | |
e20520b8 | 204 | |
9a13e99e | 205 | #define X(ENTRY)(offsetof(struct econtext, ENTRY)) |
e20520b8 | 206 | |
9a13e99e SG |
207 | #ifdef I386 |
208 | /* Mappings from tm-i386v.h */ | |
e20520b8 | 209 | |
9a13e99e SG |
210 | static int regmap[] = |
211 | { | |
e20520b8 SG |
212 | X(eax), |
213 | X(ecx), | |
214 | X(edx), | |
215 | X(ebx), | |
9a13e99e SG |
216 | X(esp), /* sp */ |
217 | X(ebp), /* fp */ | |
e20520b8 SG |
218 | X(esi), |
219 | X(edi), | |
9a13e99e | 220 | X(eip), /* pc */ |
e20520b8 SG |
221 | X(flags), /* ps */ |
222 | X(cs), | |
223 | X(ss), | |
224 | X(ds), | |
225 | X(es), | |
226 | X(ecode), /* Lynx doesn't give us either fs or gs, so */ | |
9a13e99e | 227 | X(fault), /* we just substitute these two in the hopes |
e20520b8 | 228 | that they are useful. */ |
9a13e99e SG |
229 | }; |
230 | #endif | |
231 | ||
232 | #ifdef M68K | |
233 | /* Mappings from tm-m68k.h */ | |
234 | ||
235 | static int regmap[] = | |
236 | { | |
237 | X(regs[0]), /* d0 */ | |
238 | X(regs[1]), /* d1 */ | |
239 | X(regs[2]), /* d2 */ | |
240 | X(regs[3]), /* d3 */ | |
241 | X(regs[4]), /* d4 */ | |
242 | X(regs[5]), /* d5 */ | |
243 | X(regs[6]), /* d6 */ | |
244 | X(regs[7]), /* d7 */ | |
245 | X(regs[8]), /* a0 */ | |
246 | X(regs[9]), /* a1 */ | |
247 | X(regs[10]), /* a2 */ | |
248 | X(regs[11]), /* a3 */ | |
249 | X(regs[12]), /* a4 */ | |
250 | X(regs[13]), /* a5 */ | |
251 | X(regs[14]), /* fp */ | |
252 | 0, /* sp */ | |
253 | X(status), /* ps */ | |
254 | X(pc), | |
255 | ||
256 | X(fregs[0*3]), /* fp0 */ | |
257 | X(fregs[1*3]), /* fp1 */ | |
258 | X(fregs[2*3]), /* fp2 */ | |
259 | X(fregs[3*3]), /* fp3 */ | |
260 | X(fregs[4*3]), /* fp4 */ | |
261 | X(fregs[5*3]), /* fp5 */ | |
262 | X(fregs[6*3]), /* fp6 */ | |
263 | X(fregs[7*3]), /* fp7 */ | |
264 | ||
265 | X(fcregs[0]), /* fpcontrol */ | |
266 | X(fcregs[1]), /* fpstatus */ | |
267 | X(fcregs[2]), /* fpiaddr */ | |
268 | X(ssw), /* fpcode */ | |
269 | X(fault), /* fpflags */ | |
270 | }; | |
271 | #endif | |
272 | ||
b292fca8 SS |
273 | #ifdef SPARC |
274 | /* Mappings from tm-sparc.h */ | |
275 | ||
276 | #define FX(ENTRY)(offsetof(struct fcontext, ENTRY)) | |
277 | ||
278 | static int regmap[] = | |
279 | { | |
280 | -1, /* g0 */ | |
281 | X(g1), | |
282 | X(g2), | |
283 | X(g3), | |
284 | X(g4), | |
285 | -1, /* g5->g7 aren't saved by Lynx */ | |
286 | -1, | |
287 | -1, | |
288 | ||
289 | X(o[0]), | |
290 | X(o[1]), | |
291 | X(o[2]), | |
292 | X(o[3]), | |
293 | X(o[4]), | |
294 | X(o[5]), | |
295 | X(o[6]), /* sp */ | |
296 | X(o[7]), /* ra */ | |
297 | ||
298 | -1,-1,-1,-1,-1,-1,-1,-1, /* l0 -> l7 */ | |
299 | ||
300 | -1,-1,-1,-1,-1,-1,-1,-1, /* i0 -> i7 */ | |
301 | ||
302 | FX(f.fregs[0]), /* f0 */ | |
303 | FX(f.fregs[1]), | |
304 | FX(f.fregs[2]), | |
305 | FX(f.fregs[3]), | |
306 | FX(f.fregs[4]), | |
307 | FX(f.fregs[5]), | |
308 | FX(f.fregs[6]), | |
309 | FX(f.fregs[7]), | |
310 | FX(f.fregs[8]), | |
311 | FX(f.fregs[9]), | |
312 | FX(f.fregs[10]), | |
313 | FX(f.fregs[11]), | |
314 | FX(f.fregs[12]), | |
315 | FX(f.fregs[13]), | |
316 | FX(f.fregs[14]), | |
317 | FX(f.fregs[15]), | |
318 | FX(f.fregs[16]), | |
319 | FX(f.fregs[17]), | |
320 | FX(f.fregs[18]), | |
321 | FX(f.fregs[19]), | |
322 | FX(f.fregs[20]), | |
323 | FX(f.fregs[21]), | |
324 | FX(f.fregs[22]), | |
325 | FX(f.fregs[23]), | |
326 | FX(f.fregs[24]), | |
327 | FX(f.fregs[25]), | |
328 | FX(f.fregs[26]), | |
329 | FX(f.fregs[27]), | |
330 | FX(f.fregs[28]), | |
331 | FX(f.fregs[29]), | |
332 | FX(f.fregs[30]), | |
333 | FX(f.fregs[31]), | |
334 | ||
335 | X(y), | |
336 | X(psr), | |
337 | X(wim), | |
338 | X(tbr), | |
339 | X(pc), | |
340 | X(npc), | |
341 | FX(fsr), /* fpsr */ | |
342 | -1, /* cpsr */ | |
343 | }; | |
344 | #endif | |
345 | ||
346 | #ifdef SPARC | |
347 | ||
348 | /* This routine handles some oddball cases for Sparc registers and LynxOS. | |
349 | In partucular, it causes refs to G0, g5->7, and all fp regs to return zero. | |
350 | It also handles knows where to find the I & L regs on the stack. */ | |
351 | ||
352 | void | |
353 | fetch_inferior_registers (regno) | |
354 | int regno; | |
355 | { | |
356 | #if 0 | |
357 | int whatregs = 0; | |
358 | ||
359 | #define WHATREGS_FLOAT 1 | |
360 | #define WHATREGS_GEN 2 | |
361 | #define WHATREGS_STACK 4 | |
362 | ||
363 | if (regno == -1) | |
364 | whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; | |
365 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
366 | whatregs = WHATREGS_STACK; | |
367 | else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
368 | whatregs = WHATREGS_FLOAT; | |
369 | else | |
370 | whatregs = WHATREGS_GEN; | |
371 | ||
372 | if (whatregs & WHATREGS_GEN) | |
373 | { | |
374 | struct econtext ec; /* general regs */ | |
375 | char buf[MAX_REGISTER_RAW_SIZE]; | |
376 | int retval; | |
377 | int i; | |
378 | ||
379 | errno = 0; | |
4cc1b3f7 JK |
380 | retval = ptrace (PTRACE_GETREGS, |
381 | BUILDPID (inferior_pid, general_thread), | |
382 | (PTRACE_ARG3_TYPE) &ec, | |
b292fca8 SS |
383 | 0); |
384 | if (errno) | |
385 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
386 | ||
387 | memset (buf, 0, REGISTER_RAW_SIZE (G0_REGNUM)); | |
388 | supply_register (G0_REGNUM, buf); | |
389 | supply_register (TBR_REGNUM, (char *)&ec.tbr); | |
390 | ||
391 | memcpy (®isters[REGISTER_BYTE (G1_REGNUM)], &ec.g1, | |
392 | 4 * REGISTER_RAW_SIZE (G1_REGNUM)); | |
393 | for (i = G1_REGNUM; i <= G1_REGNUM + 3; i++) | |
394 | register_valid[i] = 1; | |
395 | ||
396 | supply_register (PS_REGNUM, (char *)&ec.psr); | |
397 | supply_register (Y_REGNUM, (char *)&ec.y); | |
398 | supply_register (PC_REGNUM, (char *)&ec.pc); | |
399 | supply_register (NPC_REGNUM, (char *)&ec.npc); | |
400 | supply_register (WIM_REGNUM, (char *)&ec.wim); | |
401 | ||
402 | memcpy (®isters[REGISTER_BYTE (O0_REGNUM)], ec.o, | |
403 | 8 * REGISTER_RAW_SIZE (O0_REGNUM)); | |
404 | for (i = O0_REGNUM; i <= O0_REGNUM + 7; i++) | |
405 | register_valid[i] = 1; | |
406 | } | |
407 | ||
408 | if (whatregs & WHATREGS_STACK) | |
409 | { | |
410 | CORE_ADDR sp; | |
411 | int i; | |
412 | ||
413 | sp = read_register (SP_REGNUM); | |
414 | ||
415 | target_xfer_memory (sp + FRAME_SAVED_I0, | |
416 | ®isters[REGISTER_BYTE(I0_REGNUM)], | |
417 | 8 * REGISTER_RAW_SIZE (I0_REGNUM), 0); | |
418 | for (i = I0_REGNUM; i <= I7_REGNUM; i++) | |
419 | register_valid[i] = 1; | |
420 | ||
421 | target_xfer_memory (sp + FRAME_SAVED_L0, | |
422 | ®isters[REGISTER_BYTE(L0_REGNUM)], | |
423 | 8 * REGISTER_RAW_SIZE (L0_REGNUM), 0); | |
424 | for (i = L0_REGNUM; i <= L0_REGNUM + 7; i++) | |
425 | register_valid[i] = 1; | |
426 | } | |
427 | ||
428 | if (whatregs & WHATREGS_FLOAT) | |
429 | { | |
430 | struct fcontext fc; /* fp regs */ | |
431 | int retval; | |
432 | int i; | |
433 | ||
434 | errno = 0; | |
4cc1b3f7 | 435 | retval = ptrace (PTRACE_GETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) &fc, |
b292fca8 SS |
436 | 0); |
437 | if (errno) | |
438 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
439 | ||
440 | memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fc.f.fregs, | |
441 | 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); | |
442 | for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) | |
443 | register_valid[i] = 1; | |
444 | ||
445 | supply_register (FPS_REGNUM, (char *)&fc.fsr); | |
446 | } | |
447 | #endif | |
448 | } | |
449 | ||
450 | /* This routine handles storing of the I & L regs for the Sparc. The trick | |
451 | here is that they actually live on the stack. The really tricky part is | |
452 | that when changing the stack pointer, the I & L regs must be written to | |
453 | where the new SP points, otherwise the regs will be incorrect when the | |
454 | process is started up again. We assume that the I & L regs are valid at | |
455 | this point. */ | |
456 | ||
457 | void | |
458 | store_inferior_registers (regno) | |
459 | int regno; | |
460 | { | |
461 | #if 0 | |
462 | int whatregs = 0; | |
463 | ||
464 | if (regno == -1) | |
465 | whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; | |
466 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
467 | whatregs = WHATREGS_STACK; | |
468 | else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
469 | whatregs = WHATREGS_FLOAT; | |
470 | else if (regno == SP_REGNUM) | |
471 | whatregs = WHATREGS_STACK | WHATREGS_GEN; | |
472 | else | |
473 | whatregs = WHATREGS_GEN; | |
474 | ||
475 | if (whatregs & WHATREGS_GEN) | |
476 | { | |
477 | struct econtext ec; /* general regs */ | |
478 | int retval; | |
479 | ||
480 | ec.tbr = read_register (TBR_REGNUM); | |
481 | memcpy (&ec.g1, ®isters[REGISTER_BYTE (G1_REGNUM)], | |
482 | 4 * REGISTER_RAW_SIZE (G1_REGNUM)); | |
483 | ||
484 | ec.psr = read_register (PS_REGNUM); | |
485 | ec.y = read_register (Y_REGNUM); | |
486 | ec.pc = read_register (PC_REGNUM); | |
487 | ec.npc = read_register (NPC_REGNUM); | |
488 | ec.wim = read_register (WIM_REGNUM); | |
489 | ||
490 | memcpy (ec.o, ®isters[REGISTER_BYTE (O0_REGNUM)], | |
491 | 8 * REGISTER_RAW_SIZE (O0_REGNUM)); | |
492 | ||
493 | errno = 0; | |
4cc1b3f7 | 494 | retval = ptrace (PTRACE_SETREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) &ec, |
b292fca8 SS |
495 | 0); |
496 | if (errno) | |
497 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
498 | } | |
499 | ||
500 | if (whatregs & WHATREGS_STACK) | |
501 | { | |
502 | int regoffset; | |
503 | CORE_ADDR sp; | |
504 | ||
505 | sp = read_register (SP_REGNUM); | |
506 | ||
507 | if (regno == -1 || regno == SP_REGNUM) | |
508 | { | |
509 | if (!register_valid[L0_REGNUM+5]) | |
510 | abort(); | |
511 | target_xfer_memory (sp + FRAME_SAVED_I0, | |
512 | ®isters[REGISTER_BYTE (I0_REGNUM)], | |
513 | 8 * REGISTER_RAW_SIZE (I0_REGNUM), 1); | |
514 | ||
515 | target_xfer_memory (sp + FRAME_SAVED_L0, | |
516 | ®isters[REGISTER_BYTE (L0_REGNUM)], | |
517 | 8 * REGISTER_RAW_SIZE (L0_REGNUM), 1); | |
518 | } | |
519 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
520 | { | |
521 | if (!register_valid[regno]) | |
522 | abort(); | |
523 | if (regno >= L0_REGNUM && regno <= L0_REGNUM + 7) | |
524 | regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM) | |
525 | + FRAME_SAVED_L0; | |
526 | else | |
527 | regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (I0_REGNUM) | |
528 | + FRAME_SAVED_I0; | |
529 | target_xfer_memory (sp + regoffset, ®isters[REGISTER_BYTE (regno)], | |
530 | REGISTER_RAW_SIZE (regno), 1); | |
531 | } | |
532 | } | |
533 | ||
534 | if (whatregs & WHATREGS_FLOAT) | |
535 | { | |
536 | struct fcontext fc; /* fp regs */ | |
537 | int retval; | |
538 | ||
539 | /* We read fcontext first so that we can get good values for fq_t... */ | |
540 | errno = 0; | |
4cc1b3f7 | 541 | retval = ptrace (PTRACE_GETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) &fc, |
b292fca8 SS |
542 | 0); |
543 | if (errno) | |
544 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
545 | ||
546 | memcpy (fc.f.fregs, ®isters[REGISTER_BYTE (FP0_REGNUM)], | |
547 | 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); | |
548 | ||
549 | fc.fsr = read_register (FPS_REGNUM); | |
550 | ||
551 | errno = 0; | |
4cc1b3f7 | 552 | retval = ptrace (PTRACE_SETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) &fc, |
b292fca8 SS |
553 | 0); |
554 | if (errno) | |
555 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
556 | } | |
557 | #endif | |
558 | } | |
559 | #endif /* SPARC */ | |
560 | ||
561 | #ifndef SPARC | |
562 | ||
9a13e99e SG |
563 | /* Return the offset relative to the start of the per-thread data to the |
564 | saved context block. */ | |
565 | ||
566 | static unsigned long | |
567 | lynx_registers_addr() | |
568 | { | |
569 | CORE_ADDR stblock; | |
570 | int ecpoff = offsetof(st_t, ecp); | |
571 | CORE_ADDR ecp; | |
572 | ||
573 | errno = 0; | |
4cc1b3f7 | 574 | stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, BUILDPID (inferior_pid, general_thread), |
9a13e99e SG |
575 | (PTRACE_ARG3_TYPE)0, 0); |
576 | if (errno) | |
577 | perror_with_name ("PTRACE_THREADUSER"); | |
578 | ||
4cc1b3f7 | 579 | ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, BUILDPID (inferior_pid, general_thread), |
9a13e99e SG |
580 | (PTRACE_ARG3_TYPE)ecpoff, 0); |
581 | if (errno) | |
582 | perror_with_name ("lynx_registers_addr(PTRACE_PEEKTHREAD)"); | |
583 | ||
584 | return ecp - stblock; | |
585 | } | |
e20520b8 SG |
586 | |
587 | /* Fetch one or more registers from the inferior. REGNO == -1 to get | |
588 | them all. We actually fetch more than requested, when convenient, | |
589 | marking them as valid so we won't fetch them again. */ | |
590 | ||
591 | void | |
592 | fetch_inferior_registers (ignored) | |
593 | int ignored; | |
594 | { | |
595 | int regno; | |
596 | unsigned long reg; | |
9a13e99e | 597 | unsigned long ecp; |
e20520b8 SG |
598 | |
599 | ecp = lynx_registers_addr(); | |
600 | ||
601 | for (regno = 0; regno < NUM_REGS; regno++) | |
602 | { | |
9a13e99e SG |
603 | int ptrace_fun = PTRACE_PEEKTHREAD; |
604 | ||
605 | #ifdef PTRACE_PEEKUSP | |
606 | ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD; | |
607 | #endif | |
608 | ||
e20520b8 | 609 | errno = 0; |
4cc1b3f7 | 610 | reg = ptrace (ptrace_fun, BUILDPID (inferior_pid, general_thread), |
9a13e99e | 611 | (PTRACE_ARG3_TYPE) (ecp + regmap[regno]), 0); |
e20520b8 SG |
612 | if (errno) |
613 | perror_with_name ("fetch_inferior_registers(PTRACE_PEEKTHREAD)"); | |
614 | ||
615 | *(unsigned long *)®isters[REGISTER_BYTE (regno)] = reg; | |
616 | } | |
617 | } | |
618 | ||
619 | /* Store our register values back into the inferior. | |
620 | If REGNO is -1, do this for all registers. | |
621 | Otherwise, REGNO specifies which register (so we can save time). */ | |
622 | ||
623 | void | |
624 | store_inferior_registers (ignored) | |
625 | int ignored; | |
626 | { | |
627 | int regno; | |
628 | unsigned long reg; | |
9a13e99e | 629 | unsigned long ecp; |
e20520b8 SG |
630 | |
631 | ecp = lynx_registers_addr(); | |
632 | ||
633 | for (regno = 0; regno < NUM_REGS; regno++) | |
634 | { | |
9a13e99e SG |
635 | int ptrace_fun = PTRACE_POKEUSER; |
636 | ||
637 | #ifdef PTRACE_POKEUSP | |
638 | ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER; | |
639 | #endif | |
640 | ||
e20520b8 SG |
641 | reg = *(unsigned long *)®isters[REGISTER_BYTE (regno)]; |
642 | ||
643 | errno = 0; | |
4cc1b3f7 | 644 | ptrace (ptrace_fun, BUILDPID (inferior_pid, general_thread), |
9a13e99e | 645 | (PTRACE_ARG3_TYPE) (ecp + regmap[regno]), reg); |
e20520b8 SG |
646 | if (errno) |
647 | perror_with_name ("PTRACE_POKEUSER"); | |
648 | } | |
649 | } | |
650 | ||
b292fca8 SS |
651 | #endif /* ! SPARC */ |
652 | ||
e20520b8 SG |
653 | /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory |
654 | in the NEW_SUN_PTRACE case. | |
655 | It ought to be straightforward. But it appears that writing did | |
656 | not write the data that I specified. I cannot understand where | |
657 | it got the data that it actually did write. */ | |
658 | ||
659 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
660 | to debugger memory starting at MYADDR. */ | |
661 | ||
41e170e2 | 662 | void |
e20520b8 SG |
663 | read_inferior_memory (memaddr, myaddr, len) |
664 | CORE_ADDR memaddr; | |
665 | char *myaddr; | |
666 | int len; | |
667 | { | |
668 | register int i; | |
669 | /* Round starting address down to longword boundary. */ | |
670 | register CORE_ADDR addr = memaddr & -sizeof (int); | |
671 | /* Round ending address up; get number of longwords that makes. */ | |
672 | register int count | |
673 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
674 | /* Allocate buffer of that many longwords. */ | |
675 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
676 | ||
677 | /* Read all the longwords */ | |
678 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
679 | { | |
4cc1b3f7 | 680 | buffer[i] = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), addr, 0); |
e20520b8 SG |
681 | } |
682 | ||
683 | /* Copy appropriate bytes out of the buffer. */ | |
a6e0dae9 | 684 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); |
e20520b8 SG |
685 | } |
686 | ||
687 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
688 | to inferior's memory at MEMADDR. | |
689 | On failure (cannot write the inferior) | |
690 | returns the value of errno. */ | |
691 | ||
692 | int | |
693 | write_inferior_memory (memaddr, myaddr, len) | |
694 | CORE_ADDR memaddr; | |
695 | char *myaddr; | |
696 | int len; | |
697 | { | |
698 | register int i; | |
699 | /* Round starting address down to longword boundary. */ | |
700 | register CORE_ADDR addr = memaddr & -sizeof (int); | |
701 | /* Round ending address up; get number of longwords that makes. */ | |
702 | register int count | |
703 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
704 | /* Allocate buffer of that many longwords. */ | |
705 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
706 | extern int errno; | |
707 | ||
708 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
709 | ||
4cc1b3f7 | 710 | buffer[0] = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), addr, 0); |
e20520b8 SG |
711 | |
712 | if (count > 1) | |
713 | { | |
714 | buffer[count - 1] | |
4cc1b3f7 | 715 | = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), |
e20520b8 SG |
716 | addr + (count - 1) * sizeof (int), 0); |
717 | } | |
718 | ||
719 | /* Copy data to be written over corresponding part of buffer */ | |
720 | ||
a6e0dae9 | 721 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); |
e20520b8 SG |
722 | |
723 | /* Write the entire buffer. */ | |
724 | ||
725 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
726 | { | |
db691e4b SG |
727 | while (1) |
728 | { | |
729 | errno = 0; | |
4cc1b3f7 | 730 | ptrace (PTRACE_POKETEXT, BUILDPID (inferior_pid, general_thread), addr, buffer[i]); |
db691e4b SG |
731 | if (errno) |
732 | { | |
4cc1b3f7 JK |
733 | fprintf(stderr, "\ |
734 | ptrace (PTRACE_POKETEXT): errno=%d, pid=0x%x, addr=0x%x, buffer[i] = 0x%x\n", | |
735 | errno, BUILDPID (inferior_pid, general_thread), | |
736 | addr, buffer[i]); | |
db691e4b SG |
737 | fprintf(stderr, "Sleeping for 1 second\n"); |
738 | sleep(1); | |
739 | } | |
740 | else | |
741 | break; | |
742 | } | |
e20520b8 SG |
743 | } |
744 | ||
745 | return 0; | |
746 | } |