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d6e9fb05 JK |
1 | /* Low level interface to ptrace, for the remote server for GDB. |
2 | Copyright (C) 1986, 1987, 1993, 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include <sys/types.h> | |
22 | #include <sys/wait.h> | |
23 | #include "frame.h" | |
24 | #include "inferior.h" | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <errno.h> | |
28 | ||
29 | /***************Begin MY defs*********************/ | |
d6e9fb05 JK |
30 | static char my_registers[REGISTER_BYTES]; |
31 | char *registers = my_registers; | |
d6e9fb05 JK |
32 | /***************End MY defs*********************/ |
33 | ||
34 | #include <sys/ptrace.h> | |
35 | #include <machine/reg.h> | |
36 | ||
bd2fa4f6 | 37 | // extern int sys_nerr; |
d6e9fb05 | 38 | // extern char **sys_errlist; |
d6e9fb05 | 39 | extern int inferior_pid; |
bd2fa4f6 | 40 | void perror_with_name (); |
d6e9fb05 | 41 | |
9cebe72f C |
42 | #define RF(dst, src) \ |
43 | memcpy(®isters[REGISTER_BYTE(dst)], &src, sizeof(src)) | |
44 | ||
45 | #define RS(src, dst) \ | |
46 | memcpy(&dst, ®isters[REGISTER_BYTE(src)], sizeof(dst)) | |
47 | ||
48 | #ifdef __i386__ | |
49 | struct env387 | |
50 | { | |
51 | unsigned short control; | |
52 | unsigned short r0; | |
53 | unsigned short status; | |
54 | unsigned short r1; | |
55 | unsigned short tag; | |
56 | unsigned short r2; | |
57 | unsigned long eip; | |
58 | unsigned short code_seg; | |
59 | unsigned short opcode; | |
60 | unsigned long operand; | |
61 | unsigned short operand_seg; | |
62 | unsigned short r3; | |
63 | unsigned char regs[8][10]; | |
64 | }; | |
65 | ||
d6e9fb05 JK |
66 | /* i386_register_raw_size[i] is the number of bytes of storage in the |
67 | actual machine representation for register i. */ | |
68 | int i386_register_raw_size[MAX_NUM_REGS] = { | |
69 | 4, 4, 4, 4, | |
70 | 4, 4, 4, 4, | |
71 | 4, 4, 4, 4, | |
72 | 4, 4, 4, 4, | |
73 | 10, 10, 10, 10, | |
74 | 10, 10, 10, 10, | |
75 | 4, 4, 4, 4, | |
76 | 4, 4, 4, 4, | |
77 | 16, 16, 16, 16, | |
78 | 16, 16, 16, 16, | |
79 | 4 | |
80 | }; | |
81 | ||
82 | int i386_register_byte[MAX_NUM_REGS]; | |
83 | ||
84 | static void | |
fba45db2 | 85 | initialize_arch (void) |
d6e9fb05 JK |
86 | { |
87 | /* Initialize the table saying where each register starts in the | |
88 | register file. */ | |
89 | { | |
90 | int i, offset; | |
91 | ||
92 | offset = 0; | |
93 | for (i = 0; i < MAX_NUM_REGS; i++) | |
94 | { | |
95 | i386_register_byte[i] = offset; | |
96 | offset += i386_register_raw_size[i]; | |
97 | } | |
98 | } | |
99 | } | |
9cebe72f | 100 | #endif /* !__i386__ */ |
d6e9fb05 | 101 | |
bd2fa4f6 C |
102 | #ifdef __m68k__ |
103 | static void | |
104 | initialize_arch (void) | |
105 | { | |
106 | } | |
107 | #endif /* !__m68k__ */ | |
108 | ||
109 | #ifdef __ns32k__ | |
110 | static void | |
111 | initialize_arch (void) | |
112 | { | |
113 | } | |
114 | #endif /* !__ns32k__ */ | |
115 | ||
9cebe72f | 116 | #ifdef __powerpc__ |
22c72081 C |
117 | #include "ppc-tdep.h" |
118 | ||
9cebe72f | 119 | static void |
fba45db2 | 120 | initialize_arch (void) |
9cebe72f C |
121 | { |
122 | } | |
123 | #endif /* !__powerpc__ */ | |
d6e9fb05 JK |
124 | |
125 | ||
126 | /* Start an inferior process and returns its pid. | |
bd2fa4f6 | 127 | ALLARGS is a vector of program-name and args. */ |
d6e9fb05 JK |
128 | |
129 | int | |
fba45db2 | 130 | create_inferior (char *program, char **allargs) |
d6e9fb05 JK |
131 | { |
132 | int pid; | |
133 | ||
134 | pid = fork (); | |
135 | if (pid < 0) | |
136 | perror_with_name ("fork"); | |
137 | ||
138 | if (pid == 0) | |
139 | { | |
140 | ptrace (PT_TRACE_ME, 0, 0, 0); | |
141 | ||
142 | execv (program, allargs); | |
143 | ||
144 | fprintf (stderr, "Cannot exec %s: %s.\n", program, | |
145 | errno < sys_nerr ? sys_errlist[errno] : "unknown error"); | |
146 | fflush (stderr); | |
147 | _exit (0177); | |
148 | } | |
149 | ||
150 | return pid; | |
151 | } | |
152 | ||
153 | /* Kill the inferior process. Make us have no inferior. */ | |
154 | ||
155 | void | |
fba45db2 | 156 | kill_inferior (void) |
d6e9fb05 JK |
157 | { |
158 | if (inferior_pid == 0) | |
159 | return; | |
160 | ptrace (PT_KILL, inferior_pid, 0, 0); | |
161 | wait (0); | |
162 | /*************inferior_died ();****VK**************/ | |
163 | } | |
164 | ||
165 | /* Return nonzero if the given thread is still alive. */ | |
166 | int | |
fba45db2 | 167 | mythread_alive (int pid) |
d6e9fb05 JK |
168 | { |
169 | return 1; | |
170 | } | |
171 | ||
172 | /* Wait for process, returns status */ | |
173 | ||
174 | unsigned char | |
fba45db2 | 175 | mywait (char *status) |
d6e9fb05 JK |
176 | { |
177 | int pid; | |
178 | int w; | |
179 | ||
180 | pid = wait (&w); | |
181 | if (pid != inferior_pid) | |
182 | perror_with_name ("wait"); | |
183 | ||
184 | if (WIFEXITED (w)) | |
185 | { | |
186 | fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w)); | |
187 | *status = 'W'; | |
188 | return ((unsigned char) WEXITSTATUS (w)); | |
189 | } | |
190 | else if (!WIFSTOPPED (w)) | |
191 | { | |
192 | fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w)); | |
193 | *status = 'X'; | |
194 | return ((unsigned char) WTERMSIG (w)); | |
195 | } | |
196 | ||
197 | fetch_inferior_registers (0); | |
198 | ||
199 | *status = 'T'; | |
200 | return ((unsigned char) WSTOPSIG (w)); | |
201 | } | |
202 | ||
203 | /* Resume execution of the inferior process. | |
204 | If STEP is nonzero, single-step it. | |
205 | If SIGNAL is nonzero, give it that signal. */ | |
206 | ||
207 | void | |
fba45db2 | 208 | myresume (int step, int signal) |
d6e9fb05 JK |
209 | { |
210 | errno = 0; | |
211 | ptrace (step ? PT_STEP : PT_CONTINUE, inferior_pid, | |
212 | (PTRACE_ARG3_TYPE) 1, signal); | |
213 | if (errno) | |
214 | perror_with_name ("ptrace"); | |
215 | } | |
216 | ||
9cebe72f C |
217 | |
218 | #ifdef __i386__ | |
d6e9fb05 JK |
219 | /* Fetch one or more registers from the inferior. REGNO == -1 to get |
220 | them all. We actually fetch more than requested, when convenient, | |
221 | marking them as valid so we won't fetch them again. */ | |
222 | ||
223 | void | |
fba45db2 | 224 | fetch_inferior_registers (int ignored) |
d6e9fb05 JK |
225 | { |
226 | struct reg inferior_registers; | |
9cebe72f | 227 | struct env387 inferior_fp_registers; |
d6e9fb05 JK |
228 | |
229 | ptrace (PT_GETREGS, inferior_pid, | |
230 | (PTRACE_ARG3_TYPE) &inferior_registers, 0); | |
d6e9fb05 JK |
231 | ptrace (PT_GETFPREGS, inferior_pid, |
232 | (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); | |
9cebe72f C |
233 | |
234 | RF ( 0, inferior_registers.r_eax); | |
235 | RF ( 1, inferior_registers.r_ecx); | |
236 | RF ( 2, inferior_registers.r_edx); | |
237 | RF ( 3, inferior_registers.r_ebx); | |
238 | RF ( 4, inferior_registers.r_esp); | |
239 | RF ( 5, inferior_registers.r_ebp); | |
240 | RF ( 6, inferior_registers.r_esi); | |
241 | RF ( 7, inferior_registers.r_edi); | |
242 | RF ( 8, inferior_registers.r_eip); | |
243 | RF ( 9, inferior_registers.r_eflags); | |
244 | RF (10, inferior_registers.r_cs); | |
245 | RF (11, inferior_registers.r_ss); | |
246 | RF (12, inferior_registers.r_ds); | |
247 | RF (13, inferior_registers.r_es); | |
248 | RF (14, inferior_registers.r_fs); | |
249 | RF (15, inferior_registers.r_gs); | |
250 | ||
0c9f8a69 C |
251 | RF (FP0_REGNUM, inferior_fp_registers.regs[0]); |
252 | RF (FP0_REGNUM + 1, inferior_fp_registers.regs[1]); | |
253 | RF (FP0_REGNUM + 2, inferior_fp_registers.regs[2]); | |
254 | RF (FP0_REGNUM + 3, inferior_fp_registers.regs[3]); | |
255 | RF (FP0_REGNUM + 4, inferior_fp_registers.regs[4]); | |
256 | RF (FP0_REGNUM + 5, inferior_fp_registers.regs[5]); | |
257 | RF (FP0_REGNUM + 6, inferior_fp_registers.regs[6]); | |
258 | RF (FP0_REGNUM + 7, inferior_fp_registers.regs[7]); | |
9cebe72f | 259 | |
0c9f8a69 C |
260 | RF (FCTRL_REGNUM, inferior_fp_registers.control); |
261 | RF (FSTAT_REGNUM, inferior_fp_registers.status); | |
262 | RF (FTAG_REGNUM, inferior_fp_registers.tag); | |
263 | RF (FCS_REGNUM, inferior_fp_registers.code_seg); | |
264 | RF (FCOFF_REGNUM, inferior_fp_registers.eip); | |
265 | RF (FDS_REGNUM, inferior_fp_registers.operand_seg); | |
266 | RF (FDOFF_REGNUM, inferior_fp_registers.operand); | |
267 | RF (FOP_REGNUM, inferior_fp_registers.opcode); | |
d6e9fb05 JK |
268 | } |
269 | ||
270 | /* Store our register values back into the inferior. | |
271 | If REGNO is -1, do this for all registers. | |
272 | Otherwise, REGNO specifies which register (so we can save time). */ | |
273 | ||
274 | void | |
fba45db2 | 275 | store_inferior_registers (int ignored) |
d6e9fb05 JK |
276 | { |
277 | struct reg inferior_registers; | |
9cebe72f C |
278 | struct env387 inferior_fp_registers; |
279 | ||
280 | RS ( 0, inferior_registers.r_eax); | |
281 | RS ( 1, inferior_registers.r_ecx); | |
282 | RS ( 2, inferior_registers.r_edx); | |
283 | RS ( 3, inferior_registers.r_ebx); | |
284 | RS ( 4, inferior_registers.r_esp); | |
285 | RS ( 5, inferior_registers.r_ebp); | |
286 | RS ( 6, inferior_registers.r_esi); | |
287 | RS ( 7, inferior_registers.r_edi); | |
288 | RS ( 8, inferior_registers.r_eip); | |
289 | RS ( 9, inferior_registers.r_eflags); | |
290 | RS (10, inferior_registers.r_cs); | |
291 | RS (11, inferior_registers.r_ss); | |
292 | RS (12, inferior_registers.r_ds); | |
293 | RS (13, inferior_registers.r_es); | |
294 | RS (14, inferior_registers.r_fs); | |
295 | RS (15, inferior_registers.r_gs); | |
296 | ||
0c9f8a69 C |
297 | RS (FP0_REGNUM, inferior_fp_registers.regs[0]); |
298 | RS (FP0_REGNUM + 1, inferior_fp_registers.regs[1]); | |
299 | RS (FP0_REGNUM + 2, inferior_fp_registers.regs[2]); | |
300 | RS (FP0_REGNUM + 3, inferior_fp_registers.regs[3]); | |
301 | RS (FP0_REGNUM + 4, inferior_fp_registers.regs[4]); | |
302 | RS (FP0_REGNUM + 5, inferior_fp_registers.regs[5]); | |
303 | RS (FP0_REGNUM + 6, inferior_fp_registers.regs[6]); | |
304 | RS (FP0_REGNUM + 7, inferior_fp_registers.regs[7]); | |
9cebe72f | 305 | |
0c9f8a69 C |
306 | RS (FCTRL_REGNUM, inferior_fp_registers.control); |
307 | RS (FSTAT_REGNUM, inferior_fp_registers.status); | |
308 | RS (FTAG_REGNUM, inferior_fp_registers.tag); | |
309 | RS (FCS_REGNUM, inferior_fp_registers.code_seg); | |
310 | RS (FCOFF_REGNUM, inferior_fp_registers.eip); | |
311 | RS (FDS_REGNUM, inferior_fp_registers.operand_seg); | |
312 | RS (FDOFF_REGNUM, inferior_fp_registers.operand); | |
313 | RS (FOP_REGNUM, inferior_fp_registers.opcode); | |
d6e9fb05 | 314 | |
d6e9fb05 JK |
315 | ptrace (PT_SETREGS, inferior_pid, |
316 | (PTRACE_ARG3_TYPE) &inferior_registers, 0); | |
d6e9fb05 JK |
317 | ptrace (PT_SETFPREGS, inferior_pid, |
318 | (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); | |
d6e9fb05 | 319 | } |
9cebe72f C |
320 | #endif /* !__i386__ */ |
321 | ||
bd2fa4f6 C |
322 | #ifdef __m68k__ |
323 | /* Fetch one or more registers from the inferior. REGNO == -1 to get | |
324 | them all. We actually fetch more than requested, when convenient, | |
325 | marking them as valid so we won't fetch them again. */ | |
326 | ||
327 | void | |
328 | fetch_inferior_registers (int regno) | |
329 | { | |
330 | struct reg inferior_registers; | |
331 | struct fpreg inferior_fp_registers; | |
332 | ||
333 | ptrace (PT_GETREGS, inferior_pid, | |
334 | (PTRACE_ARG3_TYPE) & inferior_registers, 0); | |
335 | memcpy (®isters[REGISTER_BYTE (0)], &inferior_registers, | |
336 | sizeof (inferior_registers)); | |
337 | ||
338 | ptrace (PT_GETFPREGS, inferior_pid, | |
339 | (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0); | |
340 | memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers, | |
341 | sizeof (inferior_fp_registers)); | |
342 | } | |
343 | ||
344 | /* Store our register values back into the inferior. | |
345 | If REGNO is -1, do this for all registers. | |
346 | Otherwise, REGNO specifies which register (so we can save time). */ | |
347 | ||
348 | void | |
349 | store_inferior_registers (int regno) | |
350 | { | |
351 | struct reg inferior_registers; | |
352 | struct fpreg inferior_fp_registers; | |
353 | ||
354 | memcpy (&inferior_registers, ®isters[REGISTER_BYTE (0)], | |
355 | sizeof (inferior_registers)); | |
356 | ptrace (PT_SETREGS, inferior_pid, | |
357 | (PTRACE_ARG3_TYPE) & inferior_registers, 0); | |
358 | ||
359 | memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)], | |
360 | sizeof (inferior_fp_registers)); | |
361 | ptrace (PT_SETFPREGS, inferior_pid, | |
362 | (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0); | |
363 | } | |
364 | #endif /* !__m68k__ */ | |
365 | ||
366 | ||
367 | #ifdef __ns32k__ | |
368 | /* Fetch one or more registers from the inferior. REGNO == -1 to get | |
369 | them all. We actually fetch more than requested, when convenient, | |
370 | marking them as valid so we won't fetch them again. */ | |
371 | ||
372 | void | |
373 | fetch_inferior_registers (int regno) | |
374 | { | |
375 | struct reg inferior_registers; | |
376 | struct fpreg inferior_fpregisters; | |
377 | ||
378 | ptrace (PT_GETREGS, inferior_pid, | |
379 | (PTRACE_ARG3_TYPE) & inferior_registers, 0); | |
380 | ptrace (PT_GETFPREGS, inferior_pid, | |
381 | (PTRACE_ARG3_TYPE) & inferior_fpregisters, 0); | |
382 | ||
383 | RF (R0_REGNUM + 0, inferior_registers.r_r0); | |
384 | RF (R0_REGNUM + 1, inferior_registers.r_r1); | |
385 | RF (R0_REGNUM + 2, inferior_registers.r_r2); | |
386 | RF (R0_REGNUM + 3, inferior_registers.r_r3); | |
387 | RF (R0_REGNUM + 4, inferior_registers.r_r4); | |
388 | RF (R0_REGNUM + 5, inferior_registers.r_r5); | |
389 | RF (R0_REGNUM + 6, inferior_registers.r_r6); | |
390 | RF (R0_REGNUM + 7, inferior_registers.r_r7); | |
391 | ||
392 | RF (SP_REGNUM, inferior_registers.r_sp); | |
393 | RF (FP_REGNUM, inferior_registers.r_fp); | |
394 | RF (PC_REGNUM, inferior_registers.r_pc); | |
395 | RF (PS_REGNUM, inferior_registers.r_psr); | |
396 | ||
397 | RF (FPS_REGNUM, inferior_fpregisters.r_fsr); | |
398 | RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]); | |
399 | RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]); | |
400 | RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]); | |
401 | RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]); | |
402 | RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]); | |
403 | RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]); | |
404 | RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]); | |
405 | RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]); | |
406 | } | |
407 | ||
408 | /* Store our register values back into the inferior. | |
409 | If REGNO is -1, do this for all registers. | |
410 | Otherwise, REGNO specifies which register (so we can save time). */ | |
411 | ||
412 | void | |
413 | store_inferior_registers (int regno) | |
414 | { | |
415 | struct reg inferior_registers; | |
416 | struct fpreg inferior_fpregisters; | |
417 | ||
418 | RS (R0_REGNUM + 0, inferior_registers.r_r0); | |
419 | RS (R0_REGNUM + 1, inferior_registers.r_r1); | |
420 | RS (R0_REGNUM + 2, inferior_registers.r_r2); | |
421 | RS (R0_REGNUM + 3, inferior_registers.r_r3); | |
422 | RS (R0_REGNUM + 4, inferior_registers.r_r4); | |
423 | RS (R0_REGNUM + 5, inferior_registers.r_r5); | |
424 | RS (R0_REGNUM + 6, inferior_registers.r_r6); | |
425 | RS (R0_REGNUM + 7, inferior_registers.r_r7); | |
426 | ||
427 | RS (SP_REGNUM, inferior_registers.r_sp); | |
428 | RS (FP_REGNUM, inferior_registers.r_fp); | |
429 | RS (PC_REGNUM, inferior_registers.r_pc); | |
430 | RS (PS_REGNUM, inferior_registers.r_psr); | |
431 | ||
432 | RS (FPS_REGNUM, inferior_fpregisters.r_fsr); | |
433 | RS (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]); | |
434 | RS (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]); | |
435 | RS (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]); | |
436 | RS (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]); | |
437 | RS (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]); | |
438 | RS (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]); | |
439 | RS (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]); | |
440 | RS (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]); | |
441 | ||
442 | ptrace (PT_SETREGS, inferior_pid, | |
443 | (PTRACE_ARG3_TYPE) & inferior_registers, 0); | |
444 | ptrace (PT_SETFPREGS, inferior_pid, | |
445 | (PTRACE_ARG3_TYPE) & inferior_fpregisters, 0); | |
446 | ||
447 | } | |
448 | #endif /* !__ns32k__ */ | |
449 | ||
9cebe72f C |
450 | #ifdef __powerpc__ |
451 | /* Fetch one or more registers from the inferior. REGNO == -1 to get | |
452 | them all. We actually fetch more than requested, when convenient, | |
453 | marking them as valid so we won't fetch them again. */ | |
454 | ||
455 | void | |
fba45db2 | 456 | fetch_inferior_registers (int regno) |
9cebe72f C |
457 | { |
458 | struct reg inferior_registers; | |
22c72081 | 459 | #ifdef PT_GETFPREGS |
9cebe72f | 460 | struct fpreg inferior_fp_registers; |
22c72081 | 461 | #endif |
9cebe72f C |
462 | int i; |
463 | ||
464 | ptrace (PT_GETREGS, inferior_pid, | |
465 | (PTRACE_ARG3_TYPE) & inferior_registers, 0); | |
9cebe72f C |
466 | for (i = 0; i < 32; i++) |
467 | RF (i, inferior_registers.fixreg[i]); | |
22c72081 C |
468 | RF (PPC_LR_REGNUM, inferior_registers.lr); |
469 | RF (PPC_CR_REGNUM, inferior_registers.cr); | |
470 | RF (PPC_XER_REGNUM, inferior_registers.xer); | |
471 | RF (PPC_CTR_REGNUM, inferior_registers.ctr); | |
9cebe72f C |
472 | RF (PC_REGNUM, inferior_registers.pc); |
473 | ||
22c72081 C |
474 | #ifdef PT_GETFPREGS |
475 | ptrace (PT_GETFPREGS, inferior_pid, | |
476 | (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0); | |
9cebe72f C |
477 | for (i = 0; i < 32; i++) |
478 | RF (FP0_REGNUM + i, inferior_fp_registers.r_regs[i]); | |
22c72081 | 479 | #endif |
9cebe72f C |
480 | } |
481 | ||
482 | /* Store our register values back into the inferior. | |
483 | If REGNO is -1, do this for all registers. | |
484 | Otherwise, REGNO specifies which register (so we can save time). */ | |
485 | ||
486 | void | |
fba45db2 | 487 | store_inferior_registers (int regno) |
9cebe72f C |
488 | { |
489 | struct reg inferior_registers; | |
22c72081 | 490 | #ifdef PT_SETFPREGS |
9cebe72f | 491 | struct fpreg inferior_fp_registers; |
22c72081 | 492 | #endif |
9cebe72f C |
493 | int i; |
494 | ||
495 | for (i = 0; i < 32; i++) | |
496 | RS (i, inferior_registers.fixreg[i]); | |
22c72081 C |
497 | RS (PPC_LR_REGNUM, inferior_registers.lr); |
498 | RS (PPC_CR_REGNUM, inferior_registers.cr); | |
499 | RS (PPC_XER_REGNUM, inferior_registers.xer); | |
500 | RS (PPC_CTR_REGNUM, inferior_registers.ctr); | |
9cebe72f | 501 | RS (PC_REGNUM, inferior_registers.pc); |
22c72081 C |
502 | ptrace (PT_SETREGS, inferior_pid, |
503 | (PTRACE_ARG3_TYPE) & inferior_registers, 0); | |
9cebe72f | 504 | |
22c72081 | 505 | #ifdef PT_SETFPREGS |
9cebe72f C |
506 | for (i = 0; i < 32; i++) |
507 | RS (FP0_REGNUM + i, inferior_fp_registers.r_regs[i]); | |
9cebe72f C |
508 | ptrace (PT_SETFPREGS, inferior_pid, |
509 | (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0); | |
22c72081 | 510 | #endif |
9cebe72f C |
511 | } |
512 | #endif /* !__powerpc__ */ | |
d6e9fb05 JK |
513 | |
514 | /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory | |
515 | in the NEW_SUN_PTRACE case. | |
516 | It ought to be straightforward. But it appears that writing did | |
517 | not write the data that I specified. I cannot understand where | |
518 | it got the data that it actually did write. */ | |
519 | ||
520 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
521 | to debugger memory starting at MYADDR. */ | |
522 | ||
fba45db2 | 523 | read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
d6e9fb05 JK |
524 | { |
525 | register int i; | |
526 | /* Round starting address down to longword boundary. */ | |
527 | register CORE_ADDR addr = memaddr & -sizeof (int); | |
528 | /* Round ending address up; get number of longwords that makes. */ | |
529 | register int count | |
530 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
531 | /* Allocate buffer of that many longwords. */ | |
532 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
533 | ||
534 | /* Read all the longwords */ | |
535 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
536 | { | |
537 | buffer[i] = ptrace (PT_READ_D, inferior_pid, (PTRACE_ARG3_TYPE) addr, 0); | |
538 | } | |
539 | ||
540 | /* Copy appropriate bytes out of the buffer. */ | |
541 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
542 | } | |
543 | ||
544 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
545 | to inferior's memory at MEMADDR. | |
546 | On failure (cannot write the inferior) | |
547 | returns the value of errno. */ | |
548 | ||
549 | int | |
fba45db2 | 550 | write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
d6e9fb05 JK |
551 | { |
552 | register int i; | |
553 | /* Round starting address down to longword boundary. */ | |
554 | register CORE_ADDR addr = memaddr & -sizeof (int); | |
555 | /* Round ending address up; get number of longwords that makes. */ | |
556 | register int count | |
557 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
558 | /* Allocate buffer of that many longwords. */ | |
559 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
560 | extern int errno; | |
561 | ||
562 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
563 | ||
564 | buffer[0] = ptrace (PT_READ_D, inferior_pid, (PTRACE_ARG3_TYPE) addr, 0); | |
565 | ||
566 | if (count > 1) | |
567 | { | |
568 | buffer[count - 1] | |
569 | = ptrace (PT_READ_D, inferior_pid, | |
570 | (PTRACE_ARG3_TYPE) addr + (count - 1) * sizeof (int), 0); | |
571 | } | |
572 | ||
573 | /* Copy data to be written over corresponding part of buffer */ | |
574 | ||
575 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); | |
576 | ||
577 | /* Write the entire buffer. */ | |
578 | ||
579 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
580 | { | |
581 | errno = 0; | |
582 | ptrace (PT_WRITE_D, inferior_pid, (PTRACE_ARG3_TYPE) addr, buffer[i]); | |
583 | if (errno) | |
584 | return errno; | |
585 | } | |
586 | ||
587 | return 0; | |
588 | } | |
589 | \f | |
590 | void | |
fba45db2 | 591 | initialize_low (void) |
d6e9fb05 JK |
592 | { |
593 | initialize_arch (); | |
594 | } |