Commit | Line | Data |
---|---|---|
c906108c SS |
1 | /* Low level interface to ptrace, for the remote server for GDB. |
2 | Copyright (C) 1995, 1996 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 "defs.h" | |
22 | #include <sys/wait.h> | |
23 | #include "frame.h" | |
24 | #include "inferior.h" | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <sys/param.h> | |
28 | #include <sys/dir.h> | |
5c44784c | 29 | #include <sys/ptrace.h> |
c906108c SS |
30 | #include <sys/user.h> |
31 | #include <signal.h> | |
32 | #include <sys/ioctl.h> | |
c906108c SS |
33 | #include <fcntl.h> |
34 | ||
35 | /***************Begin MY defs*********************/ | |
36 | int quit_flag = 0; | |
5c44784c JM |
37 | static char my_registers[REGISTER_BYTES]; |
38 | char *registers = my_registers; | |
c906108c SS |
39 | |
40 | /* Index within `registers' of the first byte of the space for | |
41 | register N. */ | |
42 | ||
43 | ||
44 | char buf2[MAX_REGISTER_RAW_SIZE]; | |
45 | /***************End MY defs*********************/ | |
46 | ||
5c44784c | 47 | #ifdef HAVE_SYS_REG_H |
c906108c SS |
48 | #include <sys/reg.h> |
49 | #endif | |
50 | ||
5c44784c JM |
51 | /* Default the type of the ptrace transfer to int. */ |
52 | #ifndef PTRACE_XFER_TYPE | |
53 | #define PTRACE_XFER_TYPE int | |
54 | #endif | |
55 | ||
c906108c SS |
56 | extern char **environ; |
57 | extern int errno; | |
58 | extern int inferior_pid; | |
59 | void quit (), perror_with_name (); | |
60 | int query (); | |
61 | ||
eafb8301 KB |
62 | static void initialize_arch (void); |
63 | ||
c906108c SS |
64 | /* Start an inferior process and returns its pid. |
65 | ALLARGS is a vector of program-name and args. | |
66 | ENV is the environment vector to pass. */ | |
67 | ||
68 | int | |
69 | create_inferior (program, allargs) | |
70 | char *program; | |
71 | char **allargs; | |
72 | { | |
73 | int pid; | |
74 | ||
75 | pid = fork (); | |
76 | if (pid < 0) | |
77 | perror_with_name ("fork"); | |
78 | ||
79 | if (pid == 0) | |
80 | { | |
81 | ptrace (PTRACE_TRACEME, 0, 0, 0); | |
82 | ||
83 | execv (program, allargs); | |
84 | ||
85 | fprintf (stderr, "Cannot exec %s: %s.\n", program, | |
86 | errno < sys_nerr ? sys_errlist[errno] : "unknown error"); | |
87 | fflush (stderr); | |
88 | _exit (0177); | |
89 | } | |
90 | ||
91 | return pid; | |
92 | } | |
93 | ||
94 | /* Kill the inferior process. Make us have no inferior. */ | |
95 | ||
96 | void | |
97 | kill_inferior () | |
98 | { | |
99 | if (inferior_pid == 0) | |
100 | return; | |
101 | ptrace (PTRACE_KILL, inferior_pid, 0, 0); | |
102 | wait (0); | |
c5aa993b | 103 | /*************inferior_died ();****VK**************/ |
c906108c SS |
104 | } |
105 | ||
106 | /* Return nonzero if the given thread is still alive. */ | |
107 | int | |
108 | mythread_alive (pid) | |
109 | int pid; | |
110 | { | |
111 | return 1; | |
112 | } | |
113 | ||
114 | /* Wait for process, returns status */ | |
115 | ||
116 | unsigned char | |
117 | mywait (status) | |
118 | char *status; | |
119 | { | |
120 | int pid; | |
121 | union wait w; | |
122 | ||
123 | pid = wait (&w); | |
124 | if (pid != inferior_pid) | |
125 | perror_with_name ("wait"); | |
126 | ||
127 | if (WIFEXITED (w)) | |
128 | { | |
129 | fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w)); | |
130 | *status = 'W'; | |
131 | return ((unsigned char) WEXITSTATUS (w)); | |
132 | } | |
133 | else if (!WIFSTOPPED (w)) | |
134 | { | |
135 | fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w)); | |
136 | *status = 'X'; | |
137 | return ((unsigned char) WTERMSIG (w)); | |
138 | } | |
139 | ||
140 | fetch_inferior_registers (0); | |
141 | ||
142 | *status = 'T'; | |
143 | return ((unsigned char) WSTOPSIG (w)); | |
144 | } | |
145 | ||
146 | /* Resume execution of the inferior process. | |
147 | If STEP is nonzero, single-step it. | |
148 | If SIGNAL is nonzero, give it that signal. */ | |
149 | ||
150 | void | |
151 | myresume (step, signal) | |
152 | int step; | |
153 | int signal; | |
154 | { | |
155 | errno = 0; | |
156 | ptrace (step ? PTRACE_SINGLESTEP : PTRACE_CONT, inferior_pid, 1, signal); | |
157 | if (errno) | |
158 | perror_with_name ("ptrace"); | |
159 | } | |
160 | ||
161 | ||
162 | #if !defined (offsetof) | |
163 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
164 | #endif | |
165 | ||
166 | /* U_REGS_OFFSET is the offset of the registers within the u area. */ | |
167 | #if !defined (U_REGS_OFFSET) | |
168 | #define U_REGS_OFFSET \ | |
169 | ptrace (PT_READ_U, inferior_pid, \ | |
170 | (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \ | |
171 | - KERNEL_U_ADDR | |
172 | #endif | |
173 | ||
5c44784c JM |
174 | #ifdef I386_GNULINUX_TARGET |
175 | /* i386_register_raw_size[i] is the number of bytes of storage in the | |
176 | actual machine representation for register i. */ | |
177 | int i386_register_raw_size[MAX_NUM_REGS] = { | |
178 | 4, 4, 4, 4, | |
179 | 4, 4, 4, 4, | |
180 | 4, 4, 4, 4, | |
181 | 4, 4, 4, 4, | |
182 | 10, 10, 10, 10, | |
183 | 10, 10, 10, 10, | |
184 | 4, 4, 4, 4, | |
185 | 4, 4, 4, 4, | |
186 | 16, 16, 16, 16, | |
187 | 16, 16, 16, 16, | |
188 | 4 | |
189 | }; | |
190 | ||
191 | int i386_register_byte[MAX_NUM_REGS]; | |
192 | ||
193 | static void | |
eafb8301 | 194 | initialize_arch () |
5c44784c JM |
195 | { |
196 | /* Initialize the table saying where each register starts in the | |
197 | register file. */ | |
198 | { | |
199 | int i, offset; | |
200 | ||
201 | offset = 0; | |
202 | for (i = 0; i < MAX_NUM_REGS; i++) | |
203 | { | |
204 | i386_register_byte[i] = offset; | |
205 | offset += i386_register_raw_size[i]; | |
206 | } | |
207 | } | |
208 | } | |
209 | ||
c906108c SS |
210 | /* this table must line up with REGISTER_NAMES in tm-i386v.h */ |
211 | /* symbols like 'EAX' come from <sys/reg.h> */ | |
c5aa993b | 212 | static int regmap[] = |
c906108c SS |
213 | { |
214 | EAX, ECX, EDX, EBX, | |
215 | UESP, EBP, ESI, EDI, | |
216 | EIP, EFL, CS, SS, | |
217 | DS, ES, FS, GS, | |
218 | }; | |
219 | ||
220 | int | |
221 | i386_register_u_addr (blockend, regnum) | |
222 | int blockend; | |
223 | int regnum; | |
224 | { | |
225 | #if 0 | |
226 | /* this will be needed if fp registers are reinstated */ | |
227 | /* for now, you can look at them with 'info float' | |
228 | * sys5 wont let you change them with ptrace anyway | |
229 | */ | |
c5aa993b | 230 | if (regnum >= FP0_REGNUM && regnum <= FP7_REGNUM) |
c906108c SS |
231 | { |
232 | int ubase, fpstate; | |
233 | struct user u; | |
234 | ubase = blockend + 4 * (SS + 1) - KSTKSZ; | |
c5aa993b | 235 | fpstate = ubase + ((char *) &u.u_fpstate - (char *) &u); |
c906108c | 236 | return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM)); |
c5aa993b | 237 | } |
c906108c SS |
238 | else |
239 | #endif | |
240 | return (blockend + 4 * regmap[regnum]); | |
c5aa993b | 241 | |
c906108c | 242 | } |
5c44784c JM |
243 | #elif defined(TARGET_M68K) |
244 | static void | |
eafb8301 | 245 | initialize_arch () |
5c44784c JM |
246 | { |
247 | return; | |
248 | } | |
249 | ||
c906108c | 250 | /* This table must line up with REGISTER_NAMES in tm-m68k.h */ |
c5aa993b | 251 | static int regmap[] = |
c906108c SS |
252 | { |
253 | #ifdef PT_D0 | |
254 | PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7, | |
255 | PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP, | |
256 | PT_SR, PT_PC, | |
257 | #else | |
258 | 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, | |
259 | 17, 18, | |
260 | #endif | |
261 | #ifdef PT_FP0 | |
262 | PT_FP0, PT_FP1, PT_FP2, PT_FP3, PT_FP4, PT_FP5, PT_FP6, PT_FP7, | |
263 | PT_FPCR, PT_FPSR, PT_FPIAR | |
264 | #else | |
265 | 21, 24, 27, 30, 33, 36, 39, 42, 45, 46, 47 | |
266 | #endif | |
267 | }; | |
268 | ||
269 | /* BLOCKEND is the value of u.u_ar0, and points to the place where GS | |
270 | is stored. */ | |
271 | ||
272 | int | |
273 | m68k_linux_register_u_addr (blockend, regnum) | |
274 | int blockend; | |
275 | int regnum; | |
276 | { | |
c5aa993b | 277 | return (blockend + 4 * regmap[regnum]); |
c906108c | 278 | } |
eafb8301 KB |
279 | #elif defined(IA64_GNULINUX_TARGET) |
280 | #undef NUM_FREGS | |
281 | #define NUM_FREGS 0 | |
282 | ||
283 | #include <asm/ptrace_offsets.h> | |
284 | ||
285 | static int u_offsets[] = | |
286 | { | |
287 | /* general registers */ | |
288 | -1, /* gr0 not available; i.e, it's always zero */ | |
289 | PT_R1, | |
290 | PT_R2, | |
291 | PT_R3, | |
292 | PT_R4, | |
293 | PT_R5, | |
294 | PT_R6, | |
295 | PT_R7, | |
296 | PT_R8, | |
297 | PT_R9, | |
298 | PT_R10, | |
299 | PT_R11, | |
300 | PT_R12, | |
301 | PT_R13, | |
302 | PT_R14, | |
303 | PT_R15, | |
304 | PT_R16, | |
305 | PT_R17, | |
306 | PT_R18, | |
307 | PT_R19, | |
308 | PT_R20, | |
309 | PT_R21, | |
310 | PT_R22, | |
311 | PT_R23, | |
312 | PT_R24, | |
313 | PT_R25, | |
314 | PT_R26, | |
315 | PT_R27, | |
316 | PT_R28, | |
317 | PT_R29, | |
318 | PT_R30, | |
319 | PT_R31, | |
320 | /* gr32 through gr127 not directly available via the ptrace interface */ | |
321 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
322 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
323 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
324 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
325 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
326 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
327 | /* Floating point registers */ | |
328 | -1, -1, /* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */ | |
329 | PT_F2, | |
330 | PT_F3, | |
331 | PT_F4, | |
332 | PT_F5, | |
333 | PT_F6, | |
334 | PT_F7, | |
335 | PT_F8, | |
336 | PT_F9, | |
337 | PT_F10, | |
338 | PT_F11, | |
339 | PT_F12, | |
340 | PT_F13, | |
341 | PT_F14, | |
342 | PT_F15, | |
343 | PT_F16, | |
344 | PT_F17, | |
345 | PT_F18, | |
346 | PT_F19, | |
347 | PT_F20, | |
348 | PT_F21, | |
349 | PT_F22, | |
350 | PT_F23, | |
351 | PT_F24, | |
352 | PT_F25, | |
353 | PT_F26, | |
354 | PT_F27, | |
355 | PT_F28, | |
356 | PT_F29, | |
357 | PT_F30, | |
358 | PT_F31, | |
359 | PT_F32, | |
360 | PT_F33, | |
361 | PT_F34, | |
362 | PT_F35, | |
363 | PT_F36, | |
364 | PT_F37, | |
365 | PT_F38, | |
366 | PT_F39, | |
367 | PT_F40, | |
368 | PT_F41, | |
369 | PT_F42, | |
370 | PT_F43, | |
371 | PT_F44, | |
372 | PT_F45, | |
373 | PT_F46, | |
374 | PT_F47, | |
375 | PT_F48, | |
376 | PT_F49, | |
377 | PT_F50, | |
378 | PT_F51, | |
379 | PT_F52, | |
380 | PT_F53, | |
381 | PT_F54, | |
382 | PT_F55, | |
383 | PT_F56, | |
384 | PT_F57, | |
385 | PT_F58, | |
386 | PT_F59, | |
387 | PT_F60, | |
388 | PT_F61, | |
389 | PT_F62, | |
390 | PT_F63, | |
391 | PT_F64, | |
392 | PT_F65, | |
393 | PT_F66, | |
394 | PT_F67, | |
395 | PT_F68, | |
396 | PT_F69, | |
397 | PT_F70, | |
398 | PT_F71, | |
399 | PT_F72, | |
400 | PT_F73, | |
401 | PT_F74, | |
402 | PT_F75, | |
403 | PT_F76, | |
404 | PT_F77, | |
405 | PT_F78, | |
406 | PT_F79, | |
407 | PT_F80, | |
408 | PT_F81, | |
409 | PT_F82, | |
410 | PT_F83, | |
411 | PT_F84, | |
412 | PT_F85, | |
413 | PT_F86, | |
414 | PT_F87, | |
415 | PT_F88, | |
416 | PT_F89, | |
417 | PT_F90, | |
418 | PT_F91, | |
419 | PT_F92, | |
420 | PT_F93, | |
421 | PT_F94, | |
422 | PT_F95, | |
423 | PT_F96, | |
424 | PT_F97, | |
425 | PT_F98, | |
426 | PT_F99, | |
427 | PT_F100, | |
428 | PT_F101, | |
429 | PT_F102, | |
430 | PT_F103, | |
431 | PT_F104, | |
432 | PT_F105, | |
433 | PT_F106, | |
434 | PT_F107, | |
435 | PT_F108, | |
436 | PT_F109, | |
437 | PT_F110, | |
438 | PT_F111, | |
439 | PT_F112, | |
440 | PT_F113, | |
441 | PT_F114, | |
442 | PT_F115, | |
443 | PT_F116, | |
444 | PT_F117, | |
445 | PT_F118, | |
446 | PT_F119, | |
447 | PT_F120, | |
448 | PT_F121, | |
449 | PT_F122, | |
450 | PT_F123, | |
451 | PT_F124, | |
452 | PT_F125, | |
453 | PT_F126, | |
454 | PT_F127, | |
455 | /* predicate registers - we don't fetch these individually */ | |
456 | -1, -1, -1, -1, -1, -1, -1, -1, | |
457 | -1, -1, -1, -1, -1, -1, -1, -1, | |
458 | -1, -1, -1, -1, -1, -1, -1, -1, | |
459 | -1, -1, -1, -1, -1, -1, -1, -1, | |
460 | -1, -1, -1, -1, -1, -1, -1, -1, | |
461 | -1, -1, -1, -1, -1, -1, -1, -1, | |
462 | -1, -1, -1, -1, -1, -1, -1, -1, | |
463 | -1, -1, -1, -1, -1, -1, -1, -1, | |
464 | /* branch registers */ | |
465 | PT_B0, | |
466 | PT_B1, | |
467 | PT_B2, | |
468 | PT_B3, | |
469 | PT_B4, | |
470 | PT_B5, | |
471 | PT_B6, | |
472 | PT_B7, | |
473 | /* virtual frame pointer and virtual return address pointer */ | |
474 | -1, -1, | |
475 | /* other registers */ | |
476 | PT_PR, | |
477 | PT_CR_IIP, /* ip */ | |
478 | PT_CR_IPSR, /* psr */ | |
9ac12c35 | 479 | PT_CFM, /* cfm */ |
eafb8301 KB |
480 | /* kernel registers not visible via ptrace interface (?) */ |
481 | -1, -1, -1, -1, -1, -1, -1, -1, | |
482 | /* hole */ | |
483 | -1, -1, -1, -1, -1, -1, -1, -1, | |
484 | PT_AR_RSC, | |
485 | PT_AR_BSP, | |
486 | PT_AR_BSPSTORE, | |
487 | PT_AR_RNAT, | |
488 | -1, | |
489 | -1, /* Not available: FCR, IA32 floating control register */ | |
490 | -1, -1, | |
491 | -1, /* Not available: EFLAG */ | |
492 | -1, /* Not available: CSD */ | |
493 | -1, /* Not available: SSD */ | |
494 | -1, /* Not available: CFLG */ | |
495 | -1, /* Not available: FSR */ | |
496 | -1, /* Not available: FIR */ | |
497 | -1, /* Not available: FDR */ | |
498 | -1, | |
499 | PT_AR_CCV, | |
500 | -1, -1, -1, | |
501 | PT_AR_UNAT, | |
502 | -1, -1, -1, | |
503 | PT_AR_FPSR, | |
504 | -1, -1, -1, | |
505 | -1, /* Not available: ITC */ | |
506 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
507 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
508 | PT_AR_PFS, | |
509 | PT_AR_LC, | |
510 | -1, /* Not available: EC, the Epilog Count register */ | |
511 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
512 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
513 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
514 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
515 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
516 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
517 | -1, | |
518 | /* nat bits - not fetched directly; instead we obtain these bits from | |
519 | either rnat or unat or from memory. */ | |
520 | -1, -1, -1, -1, -1, -1, -1, -1, | |
521 | -1, -1, -1, -1, -1, -1, -1, -1, | |
522 | -1, -1, -1, -1, -1, -1, -1, -1, | |
523 | -1, -1, -1, -1, -1, -1, -1, -1, | |
524 | -1, -1, -1, -1, -1, -1, -1, -1, | |
525 | -1, -1, -1, -1, -1, -1, -1, -1, | |
526 | -1, -1, -1, -1, -1, -1, -1, -1, | |
527 | -1, -1, -1, -1, -1, -1, -1, -1, | |
528 | -1, -1, -1, -1, -1, -1, -1, -1, | |
529 | -1, -1, -1, -1, -1, -1, -1, -1, | |
530 | -1, -1, -1, -1, -1, -1, -1, -1, | |
531 | -1, -1, -1, -1, -1, -1, -1, -1, | |
532 | -1, -1, -1, -1, -1, -1, -1, -1, | |
533 | -1, -1, -1, -1, -1, -1, -1, -1, | |
534 | -1, -1, -1, -1, -1, -1, -1, -1, | |
535 | -1, -1, -1, -1, -1, -1, -1, -1, | |
536 | }; | |
537 | ||
538 | int | |
539 | ia64_register_u_addr (int blockend, int regnum) | |
540 | { | |
541 | int addr; | |
542 | ||
543 | if (regnum < 0 || regnum >= NUM_REGS) | |
544 | error ("Invalid register number %d.", regnum); | |
545 | ||
546 | addr = u_offsets[regnum]; | |
547 | if (addr == -1) | |
548 | addr = 0; | |
549 | ||
550 | return addr; | |
551 | } | |
552 | ||
553 | static void | |
554 | initialize_arch () | |
555 | { | |
556 | return; | |
557 | } | |
c906108c SS |
558 | #endif |
559 | ||
560 | CORE_ADDR | |
561 | register_addr (regno, blockend) | |
562 | int regno; | |
563 | CORE_ADDR blockend; | |
564 | { | |
565 | CORE_ADDR addr; | |
566 | ||
567 | if (regno < 0 || regno >= ARCH_NUM_REGS) | |
568 | error ("Invalid register number %d.", regno); | |
569 | ||
570 | REGISTER_U_ADDR (addr, blockend, regno); | |
571 | ||
572 | return addr; | |
573 | } | |
574 | ||
575 | /* Fetch one register. */ | |
576 | ||
577 | static void | |
578 | fetch_register (regno) | |
579 | int regno; | |
580 | { | |
5c44784c | 581 | CORE_ADDR regaddr; |
c906108c SS |
582 | register int i; |
583 | ||
584 | /* Offset of registers within the u area. */ | |
585 | unsigned int offset; | |
586 | ||
587 | offset = U_REGS_OFFSET; | |
588 | ||
589 | regaddr = register_addr (regno, offset); | |
5c44784c | 590 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) |
c906108c SS |
591 | { |
592 | errno = 0; | |
5c44784c JM |
593 | *(PTRACE_XFER_TYPE *) ®isters[REGISTER_BYTE (regno) + i] = |
594 | ptrace (PTRACE_PEEKUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, 0); | |
595 | regaddr += sizeof (PTRACE_XFER_TYPE); | |
c906108c SS |
596 | if (errno != 0) |
597 | { | |
598 | /* Warning, not error, in case we are attached; sometimes the | |
599 | kernel doesn't let us at the registers. */ | |
600 | char *err = strerror (errno); | |
601 | char *msg = alloca (strlen (err) + 128); | |
602 | sprintf (msg, "reading register %d: %s", regno, err); | |
603 | error (msg); | |
604 | goto error_exit; | |
605 | } | |
606 | } | |
c5aa993b | 607 | error_exit:; |
c906108c SS |
608 | } |
609 | ||
610 | /* Fetch all registers, or just one, from the child process. */ | |
611 | ||
612 | void | |
613 | fetch_inferior_registers (regno) | |
614 | int regno; | |
615 | { | |
616 | if (regno == -1 || regno == 0) | |
c5aa993b | 617 | for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++) |
c906108c SS |
618 | fetch_register (regno); |
619 | else | |
620 | fetch_register (regno); | |
621 | } | |
622 | ||
623 | /* Store our register values back into the inferior. | |
624 | If REGNO is -1, do this for all registers. | |
625 | Otherwise, REGNO specifies which register (so we can save time). */ | |
626 | ||
627 | void | |
628 | store_inferior_registers (regno) | |
629 | int regno; | |
630 | { | |
5c44784c JM |
631 | CORE_ADDR regaddr; |
632 | int i; | |
c906108c SS |
633 | unsigned int offset = U_REGS_OFFSET; |
634 | ||
635 | if (regno >= 0) | |
636 | { | |
637 | #if 0 | |
638 | if (CANNOT_STORE_REGISTER (regno)) | |
639 | return; | |
640 | #endif | |
641 | regaddr = register_addr (regno, offset); | |
642 | errno = 0; | |
643 | #if 0 | |
644 | if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM) | |
c5aa993b JM |
645 | { |
646 | scratch = *(int *) ®isters[REGISTER_BYTE (regno)] | 0x3; | |
647 | ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, | |
648 | scratch, 0); | |
649 | if (errno != 0) | |
650 | { | |
c906108c | 651 | /* Error, even if attached. Failing to write these two |
c5aa993b JM |
652 | registers is pretty serious. */ |
653 | sprintf (buf, "writing register number %d", regno); | |
654 | perror_with_name (buf); | |
655 | } | |
656 | } | |
c906108c SS |
657 | else |
658 | #endif | |
c5aa993b | 659 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) |
c906108c SS |
660 | { |
661 | errno = 0; | |
5c44784c | 662 | ptrace (PTRACE_POKEUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, |
c906108c SS |
663 | *(int *) ®isters[REGISTER_BYTE (regno) + i]); |
664 | if (errno != 0) | |
665 | { | |
666 | /* Warning, not error, in case we are attached; sometimes the | |
667 | kernel doesn't let us at the registers. */ | |
668 | char *err = strerror (errno); | |
669 | char *msg = alloca (strlen (err) + 128); | |
670 | sprintf (msg, "writing register %d: %s", | |
671 | regno, err); | |
672 | error (msg); | |
673 | return; | |
674 | } | |
c5aa993b | 675 | regaddr += sizeof (int); |
c906108c SS |
676 | } |
677 | } | |
678 | else | |
c5aa993b | 679 | for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++) |
c906108c SS |
680 | store_inferior_registers (regno); |
681 | } | |
682 | ||
683 | /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory | |
684 | in the NEW_SUN_PTRACE case. | |
685 | It ought to be straightforward. But it appears that writing did | |
686 | not write the data that I specified. I cannot understand where | |
687 | it got the data that it actually did write. */ | |
688 | ||
689 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
690 | to debugger memory starting at MYADDR. */ | |
691 | ||
692 | void | |
693 | read_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. */ | |
5c44784c | 700 | register CORE_ADDR addr = memaddr & -sizeof (PTRACE_XFER_TYPE); |
c906108c | 701 | /* Round ending address up; get number of longwords that makes. */ |
5c44784c JM |
702 | register int count |
703 | = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) | |
704 | / sizeof (PTRACE_XFER_TYPE); | |
c906108c | 705 | /* Allocate buffer of that many longwords. */ |
5c44784c JM |
706 | register PTRACE_XFER_TYPE *buffer |
707 | = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE)); | |
c906108c SS |
708 | |
709 | /* Read all the longwords */ | |
5c44784c | 710 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) |
c906108c SS |
711 | { |
712 | buffer[i] = ptrace (PTRACE_PEEKTEXT, inferior_pid, addr, 0); | |
713 | } | |
714 | ||
715 | /* Copy appropriate bytes out of the buffer. */ | |
5c44784c | 716 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), len); |
c906108c SS |
717 | } |
718 | ||
719 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
720 | to inferior's memory at MEMADDR. | |
721 | On failure (cannot write the inferior) | |
722 | returns the value of errno. */ | |
723 | ||
724 | int | |
725 | write_inferior_memory (memaddr, myaddr, len) | |
726 | CORE_ADDR memaddr; | |
727 | char *myaddr; | |
728 | int len; | |
729 | { | |
730 | register int i; | |
731 | /* Round starting address down to longword boundary. */ | |
5c44784c | 732 | register CORE_ADDR addr = memaddr & -sizeof (PTRACE_XFER_TYPE); |
c906108c SS |
733 | /* Round ending address up; get number of longwords that makes. */ |
734 | register int count | |
5c44784c | 735 | = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) / sizeof (PTRACE_XFER_TYPE); |
c906108c | 736 | /* Allocate buffer of that many longwords. */ |
5c44784c | 737 | register PTRACE_XFER_TYPE *buffer = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE)); |
c906108c SS |
738 | extern int errno; |
739 | ||
740 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
741 | ||
742 | buffer[0] = ptrace (PTRACE_PEEKTEXT, inferior_pid, addr, 0); | |
743 | ||
744 | if (count > 1) | |
745 | { | |
746 | buffer[count - 1] | |
747 | = ptrace (PTRACE_PEEKTEXT, inferior_pid, | |
5c44784c | 748 | addr + (count - 1) * sizeof (PTRACE_XFER_TYPE), 0); |
c906108c SS |
749 | } |
750 | ||
751 | /* Copy data to be written over corresponding part of buffer */ | |
752 | ||
5c44784c | 753 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), myaddr, len); |
c906108c SS |
754 | |
755 | /* Write the entire buffer. */ | |
756 | ||
5c44784c | 757 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) |
c906108c SS |
758 | { |
759 | errno = 0; | |
760 | ptrace (PTRACE_POKETEXT, inferior_pid, addr, buffer[i]); | |
761 | if (errno) | |
762 | return errno; | |
763 | } | |
764 | ||
765 | return 0; | |
766 | } | |
767 | \f | |
768 | void | |
4ce44c66 | 769 | initialize_low () |
c906108c | 770 | { |
eafb8301 | 771 | initialize_arch (); |
c906108c | 772 | } |