Commit | Line | Data |
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c906108c | 1 | /* Low level interface to ptrace, for the remote server for GDB. |
b6ba6518 KB |
2 | Copyright 1986, 1987, 1993, 1994, 1995, 1999, 2000 |
3 | Free Software Foundation, Inc. | |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #include "server.h" | |
23 | #include "frame.h" | |
24 | #include "inferior.h" | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <sys/param.h> | |
28 | #include <sys/dir.h> | |
29 | #define LYNXOS | |
30 | #include <sys/mem.h> | |
31 | #include <sys/signal.h> | |
32 | #include <sys/file.h> | |
33 | #include <sys/kernel.h> | |
34 | #ifndef __LYNXOS | |
35 | #define __LYNXOS | |
36 | #endif | |
37 | #include <sys/itimer.h> | |
38 | #include <sys/time.h> | |
39 | #include <sys/resource.h> | |
40 | #include <sys/proc.h> | |
41 | #include <signal.h> | |
42 | #include <sys/ioctl.h> | |
43 | #include <sgtty.h> | |
44 | #include <fcntl.h> | |
45 | #include <sys/wait.h> | |
46 | #include <sys/fpp.h> | |
47 | ||
5c44784c JM |
48 | static char my_registers[REGISTER_BYTES]; |
49 | char *registers = my_registers; | |
c906108c SS |
50 | |
51 | #include <sys/ptrace.h> | |
52 | ||
53 | /* Start an inferior process and returns its pid. | |
54 | ALLARGS is a vector of program-name and args. */ | |
55 | ||
56 | int | |
fba45db2 | 57 | create_inferior (char *program, char **allargs) |
c906108c SS |
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 | |
fba45db2 | 93 | kill_inferior (void) |
c906108c SS |
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 | |
fba45db2 | 105 | mythread_alive (int pid) |
c906108c SS |
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 | ||
120 | /* Wait for process, returns status */ | |
121 | ||
122 | unsigned char | |
fba45db2 | 123 | mywait (char *status) |
c906108c SS |
124 | { |
125 | int pid; | |
126 | union wait w; | |
127 | ||
128 | while (1) | |
129 | { | |
c5aa993b | 130 | enable_async_io (); |
c906108c SS |
131 | |
132 | pid = wait (&w); | |
133 | ||
c5aa993b | 134 | disable_async_io (); |
c906108c | 135 | |
c5aa993b | 136 | if (pid != PIDGET (inferior_pid)) |
c906108c SS |
137 | perror_with_name ("wait"); |
138 | ||
139 | thread_from_wait = w.w_tid; | |
140 | inferior_pid = BUILDPID (inferior_pid, w.w_tid); | |
141 | ||
c5aa993b JM |
142 | if (WIFSTOPPED (w) |
143 | && WSTOPSIG (w) == SIGTRAP) | |
c906108c SS |
144 | { |
145 | int realsig; | |
146 | ||
147 | realsig = ptrace (PTRACE_GETTRACESIG, inferior_pid, | |
c5aa993b | 148 | (PTRACE_ARG3_TYPE) 0, 0); |
c906108c SS |
149 | |
150 | if (realsig == SIGNEWTHREAD) | |
151 | { | |
152 | /* It's a new thread notification. Nothing to do here since | |
c5aa993b JM |
153 | the machine independent code in wait_for_inferior will |
154 | add the thread to the thread list and restart the thread | |
155 | when pid != inferior_pid and pid is not in the thread list. | |
156 | We don't even want to muck with realsig -- the code in | |
157 | wait_for_inferior expects SIGTRAP. */ | |
c906108c SS |
158 | ; |
159 | } | |
160 | } | |
161 | break; | |
162 | } | |
163 | ||
164 | if (WIFEXITED (w)) | |
165 | { | |
166 | *status = 'W'; | |
167 | return ((unsigned char) WEXITSTATUS (w)); | |
168 | } | |
169 | else if (!WIFSTOPPED (w)) | |
170 | { | |
171 | *status = 'X'; | |
172 | return ((unsigned char) WTERMSIG (w)); | |
173 | } | |
174 | ||
175 | fetch_inferior_registers (0); | |
176 | ||
177 | *status = 'T'; | |
178 | return ((unsigned char) WSTOPSIG (w)); | |
179 | } | |
180 | ||
181 | /* Resume execution of the inferior process. | |
182 | If STEP is nonzero, single-step it. | |
183 | If SIGNAL is nonzero, give it that signal. */ | |
184 | ||
185 | void | |
fba45db2 | 186 | myresume (int step, int signal) |
c906108c SS |
187 | { |
188 | errno = 0; | |
189 | ptrace (step ? PTRACE_SINGLESTEP_ONE : PTRACE_CONT, | |
190 | BUILDPID (inferior_pid, cont_thread == -1 ? 0 : cont_thread), | |
191 | 1, signal); | |
192 | if (errno) | |
193 | perror_with_name ("ptrace"); | |
194 | } | |
195 | ||
196 | #undef offsetof | |
197 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
198 | ||
199 | /* Mapping between GDB register #s and offsets into econtext. Must be | |
200 | consistent with REGISTER_NAMES macro in various tmXXX.h files. */ | |
201 | ||
202 | #define X(ENTRY)(offsetof(struct econtext, ENTRY)) | |
203 | ||
204 | #ifdef I386 | |
205 | /* Mappings from tm-i386v.h */ | |
206 | ||
207 | static int regmap[] = | |
208 | { | |
c5aa993b JM |
209 | X (eax), |
210 | X (ecx), | |
211 | X (edx), | |
212 | X (ebx), | |
213 | X (esp), /* sp */ | |
214 | X (ebp), /* fp */ | |
215 | X (esi), | |
216 | X (edi), | |
217 | X (eip), /* pc */ | |
218 | X (flags), /* ps */ | |
219 | X (cs), | |
220 | X (ss), | |
221 | X (ds), | |
222 | X (es), | |
223 | X (ecode), /* Lynx doesn't give us either fs or gs, so */ | |
224 | X (fault), /* we just substitute these two in the hopes | |
c906108c SS |
225 | that they are useful. */ |
226 | }; | |
227 | #endif | |
228 | ||
229 | #ifdef M68K | |
230 | /* Mappings from tm-m68k.h */ | |
231 | ||
232 | static int regmap[] = | |
233 | { | |
c5aa993b JM |
234 | X (regs[0]), /* d0 */ |
235 | X (regs[1]), /* d1 */ | |
236 | X (regs[2]), /* d2 */ | |
237 | X (regs[3]), /* d3 */ | |
238 | X (regs[4]), /* d4 */ | |
239 | X (regs[5]), /* d5 */ | |
240 | X (regs[6]), /* d6 */ | |
241 | X (regs[7]), /* d7 */ | |
242 | X (regs[8]), /* a0 */ | |
243 | X (regs[9]), /* a1 */ | |
244 | X (regs[10]), /* a2 */ | |
245 | X (regs[11]), /* a3 */ | |
246 | X (regs[12]), /* a4 */ | |
247 | X (regs[13]), /* a5 */ | |
248 | X (regs[14]), /* fp */ | |
c906108c | 249 | 0, /* sp */ |
c5aa993b JM |
250 | X (status), /* ps */ |
251 | X (pc), | |
252 | ||
253 | X (fregs[0 * 3]), /* fp0 */ | |
254 | X (fregs[1 * 3]), /* fp1 */ | |
255 | X (fregs[2 * 3]), /* fp2 */ | |
256 | X (fregs[3 * 3]), /* fp3 */ | |
257 | X (fregs[4 * 3]), /* fp4 */ | |
258 | X (fregs[5 * 3]), /* fp5 */ | |
259 | X (fregs[6 * 3]), /* fp6 */ | |
260 | X (fregs[7 * 3]), /* fp7 */ | |
261 | ||
262 | X (fcregs[0]), /* fpcontrol */ | |
263 | X (fcregs[1]), /* fpstatus */ | |
264 | X (fcregs[2]), /* fpiaddr */ | |
265 | X (ssw), /* fpcode */ | |
266 | X (fault), /* fpflags */ | |
c906108c SS |
267 | }; |
268 | #endif | |
269 | ||
270 | #ifdef SPARC | |
271 | /* Mappings from tm-sparc.h */ | |
272 | ||
273 | #define FX(ENTRY)(offsetof(struct fcontext, ENTRY)) | |
274 | ||
275 | static int regmap[] = | |
276 | { | |
277 | -1, /* g0 */ | |
c5aa993b JM |
278 | X (g1), |
279 | X (g2), | |
280 | X (g3), | |
281 | X (g4), | |
c906108c SS |
282 | -1, /* g5->g7 aren't saved by Lynx */ |
283 | -1, | |
284 | -1, | |
285 | ||
c5aa993b JM |
286 | X (o[0]), |
287 | X (o[1]), | |
288 | X (o[2]), | |
289 | X (o[3]), | |
290 | X (o[4]), | |
291 | X (o[5]), | |
292 | X (o[6]), /* sp */ | |
293 | X (o[7]), /* ra */ | |
294 | ||
295 | -1, -1, -1, -1, -1, -1, -1, -1, /* l0 -> l7 */ | |
296 | ||
297 | -1, -1, -1, -1, -1, -1, -1, -1, /* i0 -> i7 */ | |
298 | ||
299 | FX (f.fregs[0]), /* f0 */ | |
300 | FX (f.fregs[1]), | |
301 | FX (f.fregs[2]), | |
302 | FX (f.fregs[3]), | |
303 | FX (f.fregs[4]), | |
304 | FX (f.fregs[5]), | |
305 | FX (f.fregs[6]), | |
306 | FX (f.fregs[7]), | |
307 | FX (f.fregs[8]), | |
308 | FX (f.fregs[9]), | |
309 | FX (f.fregs[10]), | |
310 | FX (f.fregs[11]), | |
311 | FX (f.fregs[12]), | |
312 | FX (f.fregs[13]), | |
313 | FX (f.fregs[14]), | |
314 | FX (f.fregs[15]), | |
315 | FX (f.fregs[16]), | |
316 | FX (f.fregs[17]), | |
317 | FX (f.fregs[18]), | |
318 | FX (f.fregs[19]), | |
319 | FX (f.fregs[20]), | |
320 | FX (f.fregs[21]), | |
321 | FX (f.fregs[22]), | |
322 | FX (f.fregs[23]), | |
323 | FX (f.fregs[24]), | |
324 | FX (f.fregs[25]), | |
325 | FX (f.fregs[26]), | |
326 | FX (f.fregs[27]), | |
327 | FX (f.fregs[28]), | |
328 | FX (f.fregs[29]), | |
329 | FX (f.fregs[30]), | |
330 | FX (f.fregs[31]), | |
331 | ||
332 | X (y), | |
333 | X (psr), | |
334 | X (wim), | |
335 | X (tbr), | |
336 | X (pc), | |
337 | X (npc), | |
338 | FX (fsr), /* fpsr */ | |
c906108c SS |
339 | -1, /* cpsr */ |
340 | }; | |
341 | #endif | |
342 | ||
343 | #ifdef SPARC | |
344 | ||
345 | /* This routine handles some oddball cases for Sparc registers and LynxOS. | |
346 | In partucular, it causes refs to G0, g5->7, and all fp regs to return zero. | |
347 | It also handles knows where to find the I & L regs on the stack. */ | |
348 | ||
349 | void | |
fba45db2 | 350 | fetch_inferior_registers (int regno) |
c906108c SS |
351 | { |
352 | #if 0 | |
353 | int whatregs = 0; | |
354 | ||
355 | #define WHATREGS_FLOAT 1 | |
356 | #define WHATREGS_GEN 2 | |
357 | #define WHATREGS_STACK 4 | |
358 | ||
359 | if (regno == -1) | |
360 | whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; | |
361 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
362 | whatregs = WHATREGS_STACK; | |
363 | else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
364 | whatregs = WHATREGS_FLOAT; | |
365 | else | |
366 | whatregs = WHATREGS_GEN; | |
367 | ||
368 | if (whatregs & WHATREGS_GEN) | |
369 | { | |
c5aa993b | 370 | struct econtext ec; /* general regs */ |
c906108c SS |
371 | char buf[MAX_REGISTER_RAW_SIZE]; |
372 | int retval; | |
373 | int i; | |
374 | ||
375 | errno = 0; | |
376 | retval = ptrace (PTRACE_GETREGS, | |
377 | BUILDPID (inferior_pid, general_thread), | |
c5aa993b | 378 | (PTRACE_ARG3_TYPE) & ec, |
c906108c SS |
379 | 0); |
380 | if (errno) | |
381 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
c5aa993b | 382 | |
c906108c SS |
383 | memset (buf, 0, REGISTER_RAW_SIZE (G0_REGNUM)); |
384 | supply_register (G0_REGNUM, buf); | |
c5aa993b | 385 | supply_register (TBR_REGNUM, (char *) &ec.tbr); |
c906108c SS |
386 | |
387 | memcpy (®isters[REGISTER_BYTE (G1_REGNUM)], &ec.g1, | |
388 | 4 * REGISTER_RAW_SIZE (G1_REGNUM)); | |
389 | for (i = G1_REGNUM; i <= G1_REGNUM + 3; i++) | |
390 | register_valid[i] = 1; | |
391 | ||
c5aa993b JM |
392 | supply_register (PS_REGNUM, (char *) &ec.psr); |
393 | supply_register (Y_REGNUM, (char *) &ec.y); | |
394 | supply_register (PC_REGNUM, (char *) &ec.pc); | |
395 | supply_register (NPC_REGNUM, (char *) &ec.npc); | |
396 | supply_register (WIM_REGNUM, (char *) &ec.wim); | |
c906108c SS |
397 | |
398 | memcpy (®isters[REGISTER_BYTE (O0_REGNUM)], ec.o, | |
399 | 8 * REGISTER_RAW_SIZE (O0_REGNUM)); | |
400 | for (i = O0_REGNUM; i <= O0_REGNUM + 7; i++) | |
401 | register_valid[i] = 1; | |
402 | } | |
403 | ||
404 | if (whatregs & WHATREGS_STACK) | |
405 | { | |
406 | CORE_ADDR sp; | |
407 | int i; | |
408 | ||
409 | sp = read_register (SP_REGNUM); | |
410 | ||
411 | target_xfer_memory (sp + FRAME_SAVED_I0, | |
c5aa993b | 412 | ®isters[REGISTER_BYTE (I0_REGNUM)], |
c906108c SS |
413 | 8 * REGISTER_RAW_SIZE (I0_REGNUM), 0); |
414 | for (i = I0_REGNUM; i <= I7_REGNUM; i++) | |
415 | register_valid[i] = 1; | |
416 | ||
417 | target_xfer_memory (sp + FRAME_SAVED_L0, | |
c5aa993b | 418 | ®isters[REGISTER_BYTE (L0_REGNUM)], |
c906108c SS |
419 | 8 * REGISTER_RAW_SIZE (L0_REGNUM), 0); |
420 | for (i = L0_REGNUM; i <= L0_REGNUM + 7; i++) | |
421 | register_valid[i] = 1; | |
422 | } | |
423 | ||
424 | if (whatregs & WHATREGS_FLOAT) | |
425 | { | |
c5aa993b | 426 | struct fcontext fc; /* fp regs */ |
c906108c SS |
427 | int retval; |
428 | int i; | |
429 | ||
430 | errno = 0; | |
c5aa993b | 431 | retval = ptrace (PTRACE_GETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, |
c906108c SS |
432 | 0); |
433 | if (errno) | |
434 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
c5aa993b | 435 | |
c906108c SS |
436 | memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fc.f.fregs, |
437 | 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); | |
438 | for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) | |
439 | register_valid[i] = 1; | |
440 | ||
c5aa993b | 441 | supply_register (FPS_REGNUM, (char *) &fc.fsr); |
c906108c SS |
442 | } |
443 | #endif | |
444 | } | |
445 | ||
446 | /* This routine handles storing of the I & L regs for the Sparc. The trick | |
447 | here is that they actually live on the stack. The really tricky part is | |
448 | that when changing the stack pointer, the I & L regs must be written to | |
449 | where the new SP points, otherwise the regs will be incorrect when the | |
450 | process is started up again. We assume that the I & L regs are valid at | |
451 | this point. */ | |
452 | ||
453 | void | |
fba45db2 | 454 | store_inferior_registers (int regno) |
c906108c SS |
455 | { |
456 | #if 0 | |
457 | int whatregs = 0; | |
458 | ||
459 | if (regno == -1) | |
460 | whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; | |
461 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
462 | whatregs = WHATREGS_STACK; | |
463 | else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
464 | whatregs = WHATREGS_FLOAT; | |
465 | else if (regno == SP_REGNUM) | |
466 | whatregs = WHATREGS_STACK | WHATREGS_GEN; | |
467 | else | |
468 | whatregs = WHATREGS_GEN; | |
469 | ||
470 | if (whatregs & WHATREGS_GEN) | |
471 | { | |
c5aa993b | 472 | struct econtext ec; /* general regs */ |
c906108c SS |
473 | int retval; |
474 | ||
475 | ec.tbr = read_register (TBR_REGNUM); | |
476 | memcpy (&ec.g1, ®isters[REGISTER_BYTE (G1_REGNUM)], | |
477 | 4 * REGISTER_RAW_SIZE (G1_REGNUM)); | |
478 | ||
479 | ec.psr = read_register (PS_REGNUM); | |
480 | ec.y = read_register (Y_REGNUM); | |
481 | ec.pc = read_register (PC_REGNUM); | |
482 | ec.npc = read_register (NPC_REGNUM); | |
483 | ec.wim = read_register (WIM_REGNUM); | |
484 | ||
485 | memcpy (ec.o, ®isters[REGISTER_BYTE (O0_REGNUM)], | |
486 | 8 * REGISTER_RAW_SIZE (O0_REGNUM)); | |
487 | ||
488 | errno = 0; | |
c5aa993b | 489 | retval = ptrace (PTRACE_SETREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & ec, |
c906108c SS |
490 | 0); |
491 | if (errno) | |
492 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
493 | } | |
494 | ||
495 | if (whatregs & WHATREGS_STACK) | |
496 | { | |
497 | int regoffset; | |
498 | CORE_ADDR sp; | |
499 | ||
500 | sp = read_register (SP_REGNUM); | |
501 | ||
502 | if (regno == -1 || regno == SP_REGNUM) | |
503 | { | |
c5aa993b JM |
504 | if (!register_valid[L0_REGNUM + 5]) |
505 | abort (); | |
c906108c SS |
506 | target_xfer_memory (sp + FRAME_SAVED_I0, |
507 | ®isters[REGISTER_BYTE (I0_REGNUM)], | |
508 | 8 * REGISTER_RAW_SIZE (I0_REGNUM), 1); | |
509 | ||
510 | target_xfer_memory (sp + FRAME_SAVED_L0, | |
511 | ®isters[REGISTER_BYTE (L0_REGNUM)], | |
512 | 8 * REGISTER_RAW_SIZE (L0_REGNUM), 1); | |
513 | } | |
514 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
515 | { | |
516 | if (!register_valid[regno]) | |
c5aa993b | 517 | abort (); |
c906108c SS |
518 | if (regno >= L0_REGNUM && regno <= L0_REGNUM + 7) |
519 | regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM) | |
520 | + FRAME_SAVED_L0; | |
521 | else | |
522 | regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (I0_REGNUM) | |
523 | + FRAME_SAVED_I0; | |
524 | target_xfer_memory (sp + regoffset, ®isters[REGISTER_BYTE (regno)], | |
525 | REGISTER_RAW_SIZE (regno), 1); | |
526 | } | |
527 | } | |
528 | ||
529 | if (whatregs & WHATREGS_FLOAT) | |
530 | { | |
c5aa993b | 531 | struct fcontext fc; /* fp regs */ |
c906108c SS |
532 | int retval; |
533 | ||
534 | /* We read fcontext first so that we can get good values for fq_t... */ | |
535 | errno = 0; | |
c5aa993b | 536 | retval = ptrace (PTRACE_GETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, |
c906108c SS |
537 | 0); |
538 | if (errno) | |
539 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
c5aa993b | 540 | |
c906108c SS |
541 | memcpy (fc.f.fregs, ®isters[REGISTER_BYTE (FP0_REGNUM)], |
542 | 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); | |
543 | ||
544 | fc.fsr = read_register (FPS_REGNUM); | |
545 | ||
546 | errno = 0; | |
c5aa993b | 547 | retval = ptrace (PTRACE_SETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, |
c906108c SS |
548 | 0); |
549 | if (errno) | |
550 | perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); | |
c5aa993b | 551 | } |
c906108c SS |
552 | #endif |
553 | } | |
554 | #endif /* SPARC */ | |
555 | ||
556 | #ifndef SPARC | |
557 | ||
558 | /* Return the offset relative to the start of the per-thread data to the | |
559 | saved context block. */ | |
560 | ||
561 | static unsigned long | |
fba45db2 | 562 | lynx_registers_addr (void) |
c906108c SS |
563 | { |
564 | CORE_ADDR stblock; | |
c5aa993b | 565 | int ecpoff = offsetof (st_t, ecp); |
c906108c SS |
566 | CORE_ADDR ecp; |
567 | ||
568 | errno = 0; | |
569 | stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, BUILDPID (inferior_pid, general_thread), | |
c5aa993b | 570 | (PTRACE_ARG3_TYPE) 0, 0); |
c906108c SS |
571 | if (errno) |
572 | perror_with_name ("PTRACE_THREADUSER"); | |
573 | ||
574 | ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, BUILDPID (inferior_pid, general_thread), | |
c5aa993b | 575 | (PTRACE_ARG3_TYPE) ecpoff, 0); |
c906108c SS |
576 | if (errno) |
577 | perror_with_name ("lynx_registers_addr(PTRACE_PEEKTHREAD)"); | |
578 | ||
579 | return ecp - stblock; | |
580 | } | |
581 | ||
582 | /* Fetch one or more registers from the inferior. REGNO == -1 to get | |
583 | them all. We actually fetch more than requested, when convenient, | |
584 | marking them as valid so we won't fetch them again. */ | |
585 | ||
586 | void | |
fba45db2 | 587 | fetch_inferior_registers (int ignored) |
c906108c SS |
588 | { |
589 | int regno; | |
590 | unsigned long reg; | |
591 | unsigned long ecp; | |
592 | ||
c5aa993b | 593 | ecp = lynx_registers_addr (); |
c906108c SS |
594 | |
595 | for (regno = 0; regno < NUM_REGS; regno++) | |
596 | { | |
597 | int ptrace_fun = PTRACE_PEEKTHREAD; | |
598 | ||
599 | #ifdef PTRACE_PEEKUSP | |
600 | ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD; | |
601 | #endif | |
602 | ||
603 | errno = 0; | |
604 | reg = ptrace (ptrace_fun, BUILDPID (inferior_pid, general_thread), | |
605 | (PTRACE_ARG3_TYPE) (ecp + regmap[regno]), 0); | |
606 | if (errno) | |
607 | perror_with_name ("fetch_inferior_registers(PTRACE_PEEKTHREAD)"); | |
c5aa993b JM |
608 | |
609 | *(unsigned long *) ®isters[REGISTER_BYTE (regno)] = reg; | |
c906108c SS |
610 | } |
611 | } | |
612 | ||
613 | /* Store our register values back into the inferior. | |
614 | If REGNO is -1, do this for all registers. | |
615 | Otherwise, REGNO specifies which register (so we can save time). */ | |
616 | ||
617 | void | |
fba45db2 | 618 | store_inferior_registers (int ignored) |
c906108c SS |
619 | { |
620 | int regno; | |
621 | unsigned long reg; | |
622 | unsigned long ecp; | |
623 | ||
c5aa993b | 624 | ecp = lynx_registers_addr (); |
c906108c SS |
625 | |
626 | for (regno = 0; regno < NUM_REGS; regno++) | |
627 | { | |
628 | int ptrace_fun = PTRACE_POKEUSER; | |
629 | ||
630 | #ifdef PTRACE_POKEUSP | |
631 | ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER; | |
632 | #endif | |
633 | ||
c5aa993b | 634 | reg = *(unsigned long *) ®isters[REGISTER_BYTE (regno)]; |
c906108c SS |
635 | |
636 | errno = 0; | |
637 | ptrace (ptrace_fun, BUILDPID (inferior_pid, general_thread), | |
638 | (PTRACE_ARG3_TYPE) (ecp + regmap[regno]), reg); | |
639 | if (errno) | |
640 | perror_with_name ("PTRACE_POKEUSER"); | |
641 | } | |
642 | } | |
643 | ||
644 | #endif /* ! SPARC */ | |
645 | ||
646 | /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory | |
647 | in the NEW_SUN_PTRACE case. | |
648 | It ought to be straightforward. But it appears that writing did | |
649 | not write the data that I specified. I cannot understand where | |
650 | it got the data that it actually did write. */ | |
651 | ||
652 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
653 | to debugger memory starting at MYADDR. */ | |
654 | ||
655 | void | |
fba45db2 | 656 | read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
657 | { |
658 | register int i; | |
659 | /* Round starting address down to longword boundary. */ | |
660 | register CORE_ADDR addr = memaddr & -sizeof (int); | |
661 | /* Round ending address up; get number of longwords that makes. */ | |
662 | register int count | |
663 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
664 | /* Allocate buffer of that many longwords. */ | |
665 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
666 | ||
667 | /* Read all the longwords */ | |
668 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
669 | { | |
670 | buffer[i] = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), addr, 0); | |
671 | } | |
672 | ||
673 | /* Copy appropriate bytes out of the buffer. */ | |
674 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
675 | } | |
676 | ||
677 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
678 | to inferior's memory at MEMADDR. | |
679 | On failure (cannot write the inferior) | |
680 | returns the value of errno. */ | |
681 | ||
682 | int | |
fba45db2 | 683 | write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
684 | { |
685 | register int i; | |
686 | /* Round starting address down to longword boundary. */ | |
687 | register CORE_ADDR addr = memaddr & -sizeof (int); | |
688 | /* Round ending address up; get number of longwords that makes. */ | |
689 | register int count | |
690 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
691 | /* Allocate buffer of that many longwords. */ | |
692 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
693 | extern int errno; | |
694 | ||
695 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
696 | ||
697 | buffer[0] = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), addr, 0); | |
698 | ||
699 | if (count > 1) | |
700 | { | |
701 | buffer[count - 1] | |
702 | = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), | |
703 | addr + (count - 1) * sizeof (int), 0); | |
704 | } | |
705 | ||
706 | /* Copy data to be written over corresponding part of buffer */ | |
707 | ||
708 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); | |
709 | ||
710 | /* Write the entire buffer. */ | |
711 | ||
712 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
713 | { | |
714 | while (1) | |
715 | { | |
716 | errno = 0; | |
717 | ptrace (PTRACE_POKETEXT, BUILDPID (inferior_pid, general_thread), addr, buffer[i]); | |
718 | if (errno) | |
719 | { | |
c5aa993b | 720 | fprintf (stderr, "\ |
c906108c | 721 | ptrace (PTRACE_POKETEXT): errno=%d, pid=0x%x, addr=0x%x, buffer[i] = 0x%x\n", |
c5aa993b JM |
722 | errno, BUILDPID (inferior_pid, general_thread), |
723 | addr, buffer[i]); | |
724 | fprintf (stderr, "Sleeping for 1 second\n"); | |
725 | sleep (1); | |
c906108c SS |
726 | } |
727 | else | |
728 | break; | |
729 | } | |
730 | } | |
731 | ||
732 | return 0; | |
733 | } | |
4ce44c66 JM |
734 | \f |
735 | void | |
fba45db2 | 736 | initialize_low (void) |
4ce44c66 JM |
737 | { |
738 | } |