Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Low level interface to ptrace, for the remote server for GDB. |
b6ba6518 KB |
2 | Copyright 1995, 1996, 1998, 1999, 2000, 2001 |
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 | 21 | |
f29d9b6d | 22 | #include "server.h" |
c906108c SS |
23 | #include <sys/wait.h> |
24 | #include "frame.h" | |
25 | #include "inferior.h" | |
26 | ||
27 | #include <stdio.h> | |
28 | #include <sys/param.h> | |
29 | #include <sys/dir.h> | |
5c44784c | 30 | #include <sys/ptrace.h> |
c906108c SS |
31 | #include <sys/user.h> |
32 | #include <signal.h> | |
33 | #include <sys/ioctl.h> | |
c906108c SS |
34 | #include <fcntl.h> |
35 | ||
36 | /***************Begin MY defs*********************/ | |
5c44784c JM |
37 | static char my_registers[REGISTER_BYTES]; |
38 | char *registers = my_registers; | |
c906108c SS |
39 | /***************End MY defs*********************/ |
40 | ||
5c44784c | 41 | #ifdef HAVE_SYS_REG_H |
c906108c SS |
42 | #include <sys/reg.h> |
43 | #endif | |
44 | ||
5c44784c JM |
45 | /* Default the type of the ptrace transfer to int. */ |
46 | #ifndef PTRACE_XFER_TYPE | |
47 | #define PTRACE_XFER_TYPE int | |
48 | #endif | |
49 | ||
c906108c | 50 | extern int errno; |
c906108c | 51 | |
eafb8301 KB |
52 | static void initialize_arch (void); |
53 | ||
c906108c | 54 | /* Start an inferior process and returns its pid. |
bd2fa4f6 | 55 | ALLARGS is a vector of program-name and args. */ |
c906108c SS |
56 | |
57 | int | |
fba45db2 | 58 | create_inferior (char *program, char **allargs) |
c906108c SS |
59 | { |
60 | int pid; | |
61 | ||
62 | pid = fork (); | |
63 | if (pid < 0) | |
64 | perror_with_name ("fork"); | |
65 | ||
66 | if (pid == 0) | |
67 | { | |
68 | ptrace (PTRACE_TRACEME, 0, 0, 0); | |
69 | ||
70 | execv (program, allargs); | |
71 | ||
72 | fprintf (stderr, "Cannot exec %s: %s.\n", program, | |
73 | errno < sys_nerr ? sys_errlist[errno] : "unknown error"); | |
74 | fflush (stderr); | |
75 | _exit (0177); | |
76 | } | |
77 | ||
78 | return pid; | |
79 | } | |
80 | ||
81 | /* Kill the inferior process. Make us have no inferior. */ | |
82 | ||
83 | void | |
fba45db2 | 84 | kill_inferior (void) |
c906108c SS |
85 | { |
86 | if (inferior_pid == 0) | |
87 | return; | |
88 | ptrace (PTRACE_KILL, inferior_pid, 0, 0); | |
89 | wait (0); | |
c5aa993b | 90 | /*************inferior_died ();****VK**************/ |
c906108c SS |
91 | } |
92 | ||
93 | /* Return nonzero if the given thread is still alive. */ | |
94 | int | |
fba45db2 | 95 | mythread_alive (int pid) |
c906108c SS |
96 | { |
97 | return 1; | |
98 | } | |
99 | ||
100 | /* Wait for process, returns status */ | |
101 | ||
102 | unsigned char | |
fba45db2 | 103 | mywait (char *status) |
c906108c SS |
104 | { |
105 | int pid; | |
106 | union wait w; | |
107 | ||
cf30a8e1 C |
108 | enable_async_io (); |
109 | pid = waitpid (inferior_pid, &w, 0); | |
110 | disable_async_io (); | |
c906108c SS |
111 | if (pid != inferior_pid) |
112 | perror_with_name ("wait"); | |
113 | ||
114 | if (WIFEXITED (w)) | |
115 | { | |
116 | fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w)); | |
117 | *status = 'W'; | |
118 | return ((unsigned char) WEXITSTATUS (w)); | |
119 | } | |
120 | else if (!WIFSTOPPED (w)) | |
121 | { | |
122 | fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w)); | |
123 | *status = 'X'; | |
124 | return ((unsigned char) WTERMSIG (w)); | |
125 | } | |
126 | ||
127 | fetch_inferior_registers (0); | |
128 | ||
129 | *status = 'T'; | |
130 | return ((unsigned char) WSTOPSIG (w)); | |
131 | } | |
132 | ||
133 | /* Resume execution of the inferior process. | |
134 | If STEP is nonzero, single-step it. | |
135 | If SIGNAL is nonzero, give it that signal. */ | |
136 | ||
137 | void | |
fba45db2 | 138 | myresume (int step, int signal) |
c906108c SS |
139 | { |
140 | errno = 0; | |
141 | ptrace (step ? PTRACE_SINGLESTEP : PTRACE_CONT, inferior_pid, 1, signal); | |
142 | if (errno) | |
143 | perror_with_name ("ptrace"); | |
144 | } | |
145 | ||
146 | ||
147 | #if !defined (offsetof) | |
148 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
149 | #endif | |
150 | ||
151 | /* U_REGS_OFFSET is the offset of the registers within the u area. */ | |
152 | #if !defined (U_REGS_OFFSET) | |
153 | #define U_REGS_OFFSET \ | |
154 | ptrace (PT_READ_U, inferior_pid, \ | |
155 | (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \ | |
156 | - KERNEL_U_ADDR | |
157 | #endif | |
158 | ||
5c44784c | 159 | #ifdef I386_GNULINUX_TARGET |
0eebe06a MK |
160 | /* This module only supports access to the general purpose registers. |
161 | Adjust the relevant constants accordingly. | |
162 | ||
163 | FIXME: kettenis/2001-03-28: We should really use PTRACE_GETREGS to | |
164 | get at the registers. Better yet, we should try to share code with | |
165 | i386-linux-nat.c. */ | |
166 | #undef NUM_FREGS | |
167 | #define NUM_FREGS 0 | |
168 | #undef NUM_REGS | |
169 | #define NUM_REGS NUM_GREGS | |
170 | ||
171 | /* This stuff comes from i386-tdep.c. */ | |
172 | ||
173 | /* i386_register_byte[i] is the offset into the register file of the | |
174 | start of register number i. We initialize this from | |
175 | i386_register_raw_size. */ | |
176 | int i386_register_byte[MAX_NUM_REGS]; | |
177 | ||
178 | /* i386_register_raw_size[i] is the number of bytes of storage in | |
179 | GDB's register array occupied by register i. */ | |
5c44784c JM |
180 | int i386_register_raw_size[MAX_NUM_REGS] = { |
181 | 4, 4, 4, 4, | |
182 | 4, 4, 4, 4, | |
183 | 4, 4, 4, 4, | |
184 | 4, 4, 4, 4, | |
185 | 10, 10, 10, 10, | |
186 | 10, 10, 10, 10, | |
187 | 4, 4, 4, 4, | |
188 | 4, 4, 4, 4, | |
189 | 16, 16, 16, 16, | |
190 | 16, 16, 16, 16, | |
191 | 4 | |
192 | }; | |
193 | ||
5c44784c | 194 | static void |
fba45db2 | 195 | initialize_arch (void) |
5c44784c JM |
196 | { |
197 | /* Initialize the table saying where each register starts in the | |
198 | register file. */ | |
199 | { | |
200 | int i, offset; | |
201 | ||
202 | offset = 0; | |
203 | for (i = 0; i < MAX_NUM_REGS; i++) | |
204 | { | |
205 | i386_register_byte[i] = offset; | |
206 | offset += i386_register_raw_size[i]; | |
207 | } | |
208 | } | |
209 | } | |
210 | ||
0eebe06a MK |
211 | /* This stuff comes from i386-linux-nat.c. */ |
212 | ||
213 | /* Mapping between the general-purpose registers in `struct user' | |
214 | format and GDB's register array layout. */ | |
215 | static int regmap[] = | |
c906108c SS |
216 | { |
217 | EAX, ECX, EDX, EBX, | |
218 | UESP, EBP, ESI, EDI, | |
219 | EIP, EFL, CS, SS, | |
0eebe06a | 220 | DS, ES, FS, GS |
c906108c SS |
221 | }; |
222 | ||
0eebe06a MK |
223 | /* Return the address of register REGNUM. BLOCKEND is the value of |
224 | u.u_ar0, which should point to the registers. */ | |
c5aa993b | 225 | |
0eebe06a MK |
226 | CORE_ADDR |
227 | register_u_addr (CORE_ADDR blockend, int regnum) | |
228 | { | |
229 | return (blockend + 4 * regmap[regnum]); | |
c906108c | 230 | } |
5c44784c JM |
231 | #elif defined(TARGET_M68K) |
232 | static void | |
fba45db2 | 233 | initialize_arch (void) |
5c44784c JM |
234 | { |
235 | return; | |
236 | } | |
237 | ||
c906108c | 238 | /* This table must line up with REGISTER_NAMES in tm-m68k.h */ |
c5aa993b | 239 | static int regmap[] = |
c906108c SS |
240 | { |
241 | #ifdef PT_D0 | |
242 | PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7, | |
243 | PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP, | |
244 | PT_SR, PT_PC, | |
245 | #else | |
246 | 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, | |
247 | 17, 18, | |
248 | #endif | |
249 | #ifdef PT_FP0 | |
250 | PT_FP0, PT_FP1, PT_FP2, PT_FP3, PT_FP4, PT_FP5, PT_FP6, PT_FP7, | |
251 | PT_FPCR, PT_FPSR, PT_FPIAR | |
252 | #else | |
253 | 21, 24, 27, 30, 33, 36, 39, 42, 45, 46, 47 | |
254 | #endif | |
255 | }; | |
256 | ||
257 | /* BLOCKEND is the value of u.u_ar0, and points to the place where GS | |
258 | is stored. */ | |
259 | ||
260 | int | |
fba45db2 | 261 | m68k_linux_register_u_addr (int blockend, int regnum) |
c906108c | 262 | { |
c5aa993b | 263 | return (blockend + 4 * regmap[regnum]); |
c906108c | 264 | } |
eafb8301 KB |
265 | #elif defined(IA64_GNULINUX_TARGET) |
266 | #undef NUM_FREGS | |
267 | #define NUM_FREGS 0 | |
268 | ||
269 | #include <asm/ptrace_offsets.h> | |
270 | ||
271 | static int u_offsets[] = | |
272 | { | |
273 | /* general registers */ | |
274 | -1, /* gr0 not available; i.e, it's always zero */ | |
275 | PT_R1, | |
276 | PT_R2, | |
277 | PT_R3, | |
278 | PT_R4, | |
279 | PT_R5, | |
280 | PT_R6, | |
281 | PT_R7, | |
282 | PT_R8, | |
283 | PT_R9, | |
284 | PT_R10, | |
285 | PT_R11, | |
286 | PT_R12, | |
287 | PT_R13, | |
288 | PT_R14, | |
289 | PT_R15, | |
290 | PT_R16, | |
291 | PT_R17, | |
292 | PT_R18, | |
293 | PT_R19, | |
294 | PT_R20, | |
295 | PT_R21, | |
296 | PT_R22, | |
297 | PT_R23, | |
298 | PT_R24, | |
299 | PT_R25, | |
300 | PT_R26, | |
301 | PT_R27, | |
302 | PT_R28, | |
303 | PT_R29, | |
304 | PT_R30, | |
305 | PT_R31, | |
306 | /* gr32 through gr127 not directly available via the ptrace interface */ | |
307 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
308 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
309 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
310 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
311 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
312 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
313 | /* Floating point registers */ | |
314 | -1, -1, /* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */ | |
315 | PT_F2, | |
316 | PT_F3, | |
317 | PT_F4, | |
318 | PT_F5, | |
319 | PT_F6, | |
320 | PT_F7, | |
321 | PT_F8, | |
322 | PT_F9, | |
323 | PT_F10, | |
324 | PT_F11, | |
325 | PT_F12, | |
326 | PT_F13, | |
327 | PT_F14, | |
328 | PT_F15, | |
329 | PT_F16, | |
330 | PT_F17, | |
331 | PT_F18, | |
332 | PT_F19, | |
333 | PT_F20, | |
334 | PT_F21, | |
335 | PT_F22, | |
336 | PT_F23, | |
337 | PT_F24, | |
338 | PT_F25, | |
339 | PT_F26, | |
340 | PT_F27, | |
341 | PT_F28, | |
342 | PT_F29, | |
343 | PT_F30, | |
344 | PT_F31, | |
345 | PT_F32, | |
346 | PT_F33, | |
347 | PT_F34, | |
348 | PT_F35, | |
349 | PT_F36, | |
350 | PT_F37, | |
351 | PT_F38, | |
352 | PT_F39, | |
353 | PT_F40, | |
354 | PT_F41, | |
355 | PT_F42, | |
356 | PT_F43, | |
357 | PT_F44, | |
358 | PT_F45, | |
359 | PT_F46, | |
360 | PT_F47, | |
361 | PT_F48, | |
362 | PT_F49, | |
363 | PT_F50, | |
364 | PT_F51, | |
365 | PT_F52, | |
366 | PT_F53, | |
367 | PT_F54, | |
368 | PT_F55, | |
369 | PT_F56, | |
370 | PT_F57, | |
371 | PT_F58, | |
372 | PT_F59, | |
373 | PT_F60, | |
374 | PT_F61, | |
375 | PT_F62, | |
376 | PT_F63, | |
377 | PT_F64, | |
378 | PT_F65, | |
379 | PT_F66, | |
380 | PT_F67, | |
381 | PT_F68, | |
382 | PT_F69, | |
383 | PT_F70, | |
384 | PT_F71, | |
385 | PT_F72, | |
386 | PT_F73, | |
387 | PT_F74, | |
388 | PT_F75, | |
389 | PT_F76, | |
390 | PT_F77, | |
391 | PT_F78, | |
392 | PT_F79, | |
393 | PT_F80, | |
394 | PT_F81, | |
395 | PT_F82, | |
396 | PT_F83, | |
397 | PT_F84, | |
398 | PT_F85, | |
399 | PT_F86, | |
400 | PT_F87, | |
401 | PT_F88, | |
402 | PT_F89, | |
403 | PT_F90, | |
404 | PT_F91, | |
405 | PT_F92, | |
406 | PT_F93, | |
407 | PT_F94, | |
408 | PT_F95, | |
409 | PT_F96, | |
410 | PT_F97, | |
411 | PT_F98, | |
412 | PT_F99, | |
413 | PT_F100, | |
414 | PT_F101, | |
415 | PT_F102, | |
416 | PT_F103, | |
417 | PT_F104, | |
418 | PT_F105, | |
419 | PT_F106, | |
420 | PT_F107, | |
421 | PT_F108, | |
422 | PT_F109, | |
423 | PT_F110, | |
424 | PT_F111, | |
425 | PT_F112, | |
426 | PT_F113, | |
427 | PT_F114, | |
428 | PT_F115, | |
429 | PT_F116, | |
430 | PT_F117, | |
431 | PT_F118, | |
432 | PT_F119, | |
433 | PT_F120, | |
434 | PT_F121, | |
435 | PT_F122, | |
436 | PT_F123, | |
437 | PT_F124, | |
438 | PT_F125, | |
439 | PT_F126, | |
440 | PT_F127, | |
441 | /* predicate registers - we don't fetch these individually */ | |
442 | -1, -1, -1, -1, -1, -1, -1, -1, | |
443 | -1, -1, -1, -1, -1, -1, -1, -1, | |
444 | -1, -1, -1, -1, -1, -1, -1, -1, | |
445 | -1, -1, -1, -1, -1, -1, -1, -1, | |
446 | -1, -1, -1, -1, -1, -1, -1, -1, | |
447 | -1, -1, -1, -1, -1, -1, -1, -1, | |
448 | -1, -1, -1, -1, -1, -1, -1, -1, | |
449 | -1, -1, -1, -1, -1, -1, -1, -1, | |
450 | /* branch registers */ | |
451 | PT_B0, | |
452 | PT_B1, | |
453 | PT_B2, | |
454 | PT_B3, | |
455 | PT_B4, | |
456 | PT_B5, | |
457 | PT_B6, | |
458 | PT_B7, | |
459 | /* virtual frame pointer and virtual return address pointer */ | |
460 | -1, -1, | |
461 | /* other registers */ | |
462 | PT_PR, | |
463 | PT_CR_IIP, /* ip */ | |
464 | PT_CR_IPSR, /* psr */ | |
9ac12c35 | 465 | PT_CFM, /* cfm */ |
eafb8301 KB |
466 | /* kernel registers not visible via ptrace interface (?) */ |
467 | -1, -1, -1, -1, -1, -1, -1, -1, | |
468 | /* hole */ | |
469 | -1, -1, -1, -1, -1, -1, -1, -1, | |
470 | PT_AR_RSC, | |
471 | PT_AR_BSP, | |
472 | PT_AR_BSPSTORE, | |
473 | PT_AR_RNAT, | |
474 | -1, | |
475 | -1, /* Not available: FCR, IA32 floating control register */ | |
476 | -1, -1, | |
477 | -1, /* Not available: EFLAG */ | |
478 | -1, /* Not available: CSD */ | |
479 | -1, /* Not available: SSD */ | |
480 | -1, /* Not available: CFLG */ | |
481 | -1, /* Not available: FSR */ | |
482 | -1, /* Not available: FIR */ | |
483 | -1, /* Not available: FDR */ | |
484 | -1, | |
485 | PT_AR_CCV, | |
486 | -1, -1, -1, | |
487 | PT_AR_UNAT, | |
488 | -1, -1, -1, | |
489 | PT_AR_FPSR, | |
490 | -1, -1, -1, | |
491 | -1, /* Not available: ITC */ | |
492 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
493 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
494 | PT_AR_PFS, | |
495 | PT_AR_LC, | |
496 | -1, /* Not available: EC, the Epilog Count register */ | |
497 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
498 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
499 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
500 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
501 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
502 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
503 | -1, | |
504 | /* nat bits - not fetched directly; instead we obtain these bits from | |
505 | either rnat or unat or from memory. */ | |
506 | -1, -1, -1, -1, -1, -1, -1, -1, | |
507 | -1, -1, -1, -1, -1, -1, -1, -1, | |
508 | -1, -1, -1, -1, -1, -1, -1, -1, | |
509 | -1, -1, -1, -1, -1, -1, -1, -1, | |
510 | -1, -1, -1, -1, -1, -1, -1, -1, | |
511 | -1, -1, -1, -1, -1, -1, -1, -1, | |
512 | -1, -1, -1, -1, -1, -1, -1, -1, | |
513 | -1, -1, -1, -1, -1, -1, -1, -1, | |
514 | -1, -1, -1, -1, -1, -1, -1, -1, | |
515 | -1, -1, -1, -1, -1, -1, -1, -1, | |
516 | -1, -1, -1, -1, -1, -1, -1, -1, | |
517 | -1, -1, -1, -1, -1, -1, -1, -1, | |
518 | -1, -1, -1, -1, -1, -1, -1, -1, | |
519 | -1, -1, -1, -1, -1, -1, -1, -1, | |
520 | -1, -1, -1, -1, -1, -1, -1, -1, | |
521 | -1, -1, -1, -1, -1, -1, -1, -1, | |
522 | }; | |
523 | ||
524 | int | |
525 | ia64_register_u_addr (int blockend, int regnum) | |
526 | { | |
527 | int addr; | |
528 | ||
529 | if (regnum < 0 || regnum >= NUM_REGS) | |
530 | error ("Invalid register number %d.", regnum); | |
531 | ||
532 | addr = u_offsets[regnum]; | |
533 | if (addr == -1) | |
534 | addr = 0; | |
535 | ||
536 | return addr; | |
537 | } | |
538 | ||
539 | static void | |
fba45db2 | 540 | initialize_arch (void) |
eafb8301 KB |
541 | { |
542 | return; | |
543 | } | |
c906108c SS |
544 | #endif |
545 | ||
546 | CORE_ADDR | |
fba45db2 | 547 | register_addr (int regno, CORE_ADDR blockend) |
c906108c SS |
548 | { |
549 | CORE_ADDR addr; | |
550 | ||
a728f042 | 551 | if (regno < 0 || regno >= NUM_REGS) |
c906108c SS |
552 | error ("Invalid register number %d.", regno); |
553 | ||
554 | REGISTER_U_ADDR (addr, blockend, regno); | |
555 | ||
556 | return addr; | |
557 | } | |
558 | ||
559 | /* Fetch one register. */ | |
560 | ||
561 | static void | |
fba45db2 | 562 | fetch_register (int regno) |
c906108c | 563 | { |
5c44784c | 564 | CORE_ADDR regaddr; |
c906108c SS |
565 | register int i; |
566 | ||
567 | /* Offset of registers within the u area. */ | |
568 | unsigned int offset; | |
569 | ||
570 | offset = U_REGS_OFFSET; | |
571 | ||
572 | regaddr = register_addr (regno, offset); | |
5c44784c | 573 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) |
c906108c SS |
574 | { |
575 | errno = 0; | |
5c44784c JM |
576 | *(PTRACE_XFER_TYPE *) ®isters[REGISTER_BYTE (regno) + i] = |
577 | ptrace (PTRACE_PEEKUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, 0); | |
578 | regaddr += sizeof (PTRACE_XFER_TYPE); | |
c906108c SS |
579 | if (errno != 0) |
580 | { | |
581 | /* Warning, not error, in case we are attached; sometimes the | |
582 | kernel doesn't let us at the registers. */ | |
583 | char *err = strerror (errno); | |
584 | char *msg = alloca (strlen (err) + 128); | |
585 | sprintf (msg, "reading register %d: %s", regno, err); | |
586 | error (msg); | |
587 | goto error_exit; | |
588 | } | |
589 | } | |
c5aa993b | 590 | error_exit:; |
c906108c SS |
591 | } |
592 | ||
593 | /* Fetch all registers, or just one, from the child process. */ | |
594 | ||
595 | void | |
fba45db2 | 596 | fetch_inferior_registers (int regno) |
c906108c SS |
597 | { |
598 | if (regno == -1 || regno == 0) | |
c5aa993b | 599 | for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++) |
c906108c SS |
600 | fetch_register (regno); |
601 | else | |
602 | fetch_register (regno); | |
603 | } | |
604 | ||
605 | /* Store our register values back into the inferior. | |
606 | If REGNO is -1, do this for all registers. | |
607 | Otherwise, REGNO specifies which register (so we can save time). */ | |
608 | ||
609 | void | |
fba45db2 | 610 | store_inferior_registers (int regno) |
c906108c | 611 | { |
5c44784c JM |
612 | CORE_ADDR regaddr; |
613 | int i; | |
c906108c SS |
614 | unsigned int offset = U_REGS_OFFSET; |
615 | ||
616 | if (regno >= 0) | |
617 | { | |
618 | #if 0 | |
619 | if (CANNOT_STORE_REGISTER (regno)) | |
620 | return; | |
621 | #endif | |
622 | regaddr = register_addr (regno, offset); | |
623 | errno = 0; | |
624 | #if 0 | |
625 | if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM) | |
c5aa993b JM |
626 | { |
627 | scratch = *(int *) ®isters[REGISTER_BYTE (regno)] | 0x3; | |
628 | ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, | |
629 | scratch, 0); | |
630 | if (errno != 0) | |
631 | { | |
c906108c | 632 | /* Error, even if attached. Failing to write these two |
c5aa993b JM |
633 | registers is pretty serious. */ |
634 | sprintf (buf, "writing register number %d", regno); | |
635 | perror_with_name (buf); | |
636 | } | |
637 | } | |
c906108c SS |
638 | else |
639 | #endif | |
c5aa993b | 640 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) |
c906108c SS |
641 | { |
642 | errno = 0; | |
5c44784c | 643 | ptrace (PTRACE_POKEUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, |
c906108c SS |
644 | *(int *) ®isters[REGISTER_BYTE (regno) + i]); |
645 | if (errno != 0) | |
646 | { | |
647 | /* Warning, not error, in case we are attached; sometimes the | |
648 | kernel doesn't let us at the registers. */ | |
649 | char *err = strerror (errno); | |
650 | char *msg = alloca (strlen (err) + 128); | |
651 | sprintf (msg, "writing register %d: %s", | |
652 | regno, err); | |
653 | error (msg); | |
654 | return; | |
655 | } | |
c5aa993b | 656 | regaddr += sizeof (int); |
c906108c SS |
657 | } |
658 | } | |
659 | else | |
c5aa993b | 660 | for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++) |
c906108c SS |
661 | store_inferior_registers (regno); |
662 | } | |
663 | ||
664 | /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory | |
665 | in the NEW_SUN_PTRACE case. | |
666 | It ought to be straightforward. But it appears that writing did | |
667 | not write the data that I specified. I cannot understand where | |
668 | it got the data that it actually did write. */ | |
669 | ||
670 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
671 | to debugger memory starting at MYADDR. */ | |
672 | ||
673 | void | |
fba45db2 | 674 | read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
675 | { |
676 | register int i; | |
677 | /* Round starting address down to longword boundary. */ | |
5c44784c | 678 | register CORE_ADDR addr = memaddr & -sizeof (PTRACE_XFER_TYPE); |
c906108c | 679 | /* Round ending address up; get number of longwords that makes. */ |
5c44784c JM |
680 | register int count |
681 | = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) | |
682 | / sizeof (PTRACE_XFER_TYPE); | |
c906108c | 683 | /* Allocate buffer of that many longwords. */ |
5c44784c JM |
684 | register PTRACE_XFER_TYPE *buffer |
685 | = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE)); | |
c906108c SS |
686 | |
687 | /* Read all the longwords */ | |
5c44784c | 688 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) |
c906108c SS |
689 | { |
690 | buffer[i] = ptrace (PTRACE_PEEKTEXT, inferior_pid, addr, 0); | |
691 | } | |
692 | ||
693 | /* Copy appropriate bytes out of the buffer. */ | |
5c44784c | 694 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), len); |
c906108c SS |
695 | } |
696 | ||
697 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
698 | to inferior's memory at MEMADDR. | |
699 | On failure (cannot write the inferior) | |
700 | returns the value of errno. */ | |
701 | ||
702 | int | |
fba45db2 | 703 | write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
704 | { |
705 | register int i; | |
706 | /* Round starting address down to longword boundary. */ | |
5c44784c | 707 | register CORE_ADDR addr = memaddr & -sizeof (PTRACE_XFER_TYPE); |
c906108c SS |
708 | /* Round ending address up; get number of longwords that makes. */ |
709 | register int count | |
5c44784c | 710 | = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) / sizeof (PTRACE_XFER_TYPE); |
c906108c | 711 | /* Allocate buffer of that many longwords. */ |
5c44784c | 712 | register PTRACE_XFER_TYPE *buffer = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE)); |
c906108c SS |
713 | extern int errno; |
714 | ||
715 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
716 | ||
717 | buffer[0] = ptrace (PTRACE_PEEKTEXT, inferior_pid, addr, 0); | |
718 | ||
719 | if (count > 1) | |
720 | { | |
721 | buffer[count - 1] | |
722 | = ptrace (PTRACE_PEEKTEXT, inferior_pid, | |
5c44784c | 723 | addr + (count - 1) * sizeof (PTRACE_XFER_TYPE), 0); |
c906108c SS |
724 | } |
725 | ||
726 | /* Copy data to be written over corresponding part of buffer */ | |
727 | ||
5c44784c | 728 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), myaddr, len); |
c906108c SS |
729 | |
730 | /* Write the entire buffer. */ | |
731 | ||
5c44784c | 732 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) |
c906108c SS |
733 | { |
734 | errno = 0; | |
735 | ptrace (PTRACE_POKETEXT, inferior_pid, addr, buffer[i]); | |
736 | if (errno) | |
737 | return errno; | |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | \f | |
743 | void | |
fba45db2 | 744 | initialize_low (void) |
c906108c | 745 | { |
eafb8301 | 746 | initialize_arch (); |
c906108c | 747 | } |