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cc61838f WJ |
1 | /*- |
2 | * This code is derived from software copyrighted by the Free Software | |
3 | * Foundation. | |
4 | * | |
5 | * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. | |
6 | * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. | |
7 | */ | |
8 | ||
9 | #ifndef lint | |
10 | static char sccsid[] = "@(#)infcmd.c 6.4 (Berkeley) 5/8/91"; | |
11 | #endif /* not lint */ | |
12 | ||
13 | /* Memory-access and commands for inferior process, for GDB. | |
14 | Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc. | |
15 | ||
16 | This file is part of GDB. | |
17 | ||
18 | GDB is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 1, or (at your option) | |
21 | any later version. | |
22 | ||
23 | GDB is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with GDB; see the file COPYING. If not, write to | |
30 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
32 | #include <stdio.h> | |
33 | #include "defs.h" | |
34 | #include "param.h" | |
35 | #include "symtab.h" | |
36 | #include "frame.h" | |
37 | #include "inferior.h" | |
38 | #include "environ.h" | |
39 | #include "value.h" | |
40 | ||
41 | #include <signal.h> | |
42 | #include <sys/param.h> | |
43 | ||
44 | extern char *sys_siglist[]; | |
45 | ||
46 | #define ERROR_NO_INFERIOR \ | |
47 | if (inferior_pid == 0) error ("The program is not being run."); | |
48 | ||
49 | /* String containing arguments to give to the program, | |
50 | with a space added at the front. Just a space means no args. */ | |
51 | ||
52 | static char *inferior_args; | |
53 | ||
54 | /* File name for default use for standard in/out in the inferior. */ | |
55 | ||
56 | char *inferior_io_terminal; | |
57 | ||
58 | /* Pid of our debugged inferior, or 0 if no inferior now. */ | |
59 | ||
60 | int inferior_pid; | |
61 | ||
62 | /* Last signal that the inferior received (why it stopped). */ | |
63 | ||
64 | int stop_signal; | |
65 | ||
66 | /* Address at which inferior stopped. */ | |
67 | ||
68 | CORE_ADDR stop_pc; | |
69 | ||
70 | /* Stack frame when program stopped. */ | |
71 | ||
72 | FRAME_ADDR stop_frame_address; | |
73 | ||
74 | /* Number of breakpoint it stopped at, or 0 if none. */ | |
75 | ||
76 | int stop_breakpoint; | |
77 | ||
78 | /* Nonzero if stopped due to a step command. */ | |
79 | ||
80 | int stop_step; | |
81 | ||
82 | /* Nonzero if stopped due to completion of a stack dummy routine. */ | |
83 | ||
84 | int stop_stack_dummy; | |
85 | ||
86 | /* Nonzero if stopped due to a random (unexpected) signal in inferior | |
87 | process. */ | |
88 | ||
89 | int stopped_by_random_signal; | |
90 | ||
91 | /* Range to single step within. | |
92 | If this is nonzero, respond to a single-step signal | |
93 | by continuing to step if the pc is in this range. */ | |
94 | ||
95 | CORE_ADDR step_range_start; /* Inclusive */ | |
96 | CORE_ADDR step_range_end; /* Exclusive */ | |
97 | ||
98 | /* Stack frame address as of when stepping command was issued. | |
99 | This is how we know when we step into a subroutine call, | |
100 | and how to set the frame for the breakpoint used to step out. */ | |
101 | ||
102 | FRAME_ADDR step_frame_address; | |
103 | ||
104 | /* 1 means step over all subroutine calls. | |
105 | -1 means step over calls to undebuggable functions. */ | |
106 | ||
107 | int step_over_calls; | |
108 | ||
109 | /* If stepping, nonzero means step count is > 1 | |
110 | so don't print frame next time inferior stops | |
111 | if it stops due to stepping. */ | |
112 | ||
113 | int step_multi; | |
114 | ||
115 | /* Environment to use for running inferior, | |
116 | in format described in environ.h. */ | |
117 | ||
118 | struct environ *inferior_environ; | |
119 | ||
120 | CORE_ADDR read_pc (); | |
121 | struct command_line *get_breakpoint_commands (); | |
122 | void breakpoint_clear_ignore_counts (); | |
123 | ||
124 | \f | |
125 | int | |
126 | have_inferior_p () | |
127 | { | |
128 | return inferior_pid != 0; | |
129 | } | |
130 | ||
131 | static void | |
132 | set_args_command (args) | |
133 | char *args; | |
134 | { | |
135 | free (inferior_args); | |
136 | if (!args) args = ""; | |
137 | inferior_args = concat (" ", args, ""); | |
138 | } | |
139 | ||
140 | void | |
141 | tty_command (file, from_tty) | |
142 | char *file; | |
143 | int from_tty; | |
144 | { | |
145 | if (file == 0) | |
146 | error_no_arg ("terminal name for running target process"); | |
147 | ||
148 | inferior_io_terminal = savestring (file, strlen (file)); | |
149 | } | |
150 | ||
151 | static void | |
152 | run_command (args, from_tty) | |
153 | char *args; | |
154 | int from_tty; | |
155 | { | |
156 | extern char **environ; | |
157 | register int i; | |
158 | char *exec_file; | |
159 | char *allargs; | |
160 | ||
161 | extern int sys_nerr; | |
162 | extern char *sys_errlist[]; | |
163 | extern int errno; | |
164 | ||
165 | dont_repeat (); | |
166 | ||
167 | if (inferior_pid) | |
168 | { | |
169 | extern int inhibit_confirm; | |
170 | if (!(inhibit_confirm || | |
171 | query ("The program being debugged has been started already.\n\ | |
172 | Start it from the beginning? "))) | |
173 | error ("Program not restarted."); | |
174 | kill_inferior (); | |
175 | } | |
176 | ||
177 | #if 0 | |
178 | /* On the other hand, some users want to do | |
179 | break open | |
180 | ignore 1 40 | |
181 | run | |
182 | So it's not clear what is best. */ | |
183 | ||
184 | /* It is confusing to the user for ignore counts to stick around | |
185 | from previous runs of the inferior. So clear them. */ | |
186 | breakpoint_clear_ignore_counts (); | |
187 | #endif | |
188 | ||
189 | exec_file = (char *) get_exec_file (1); | |
190 | ||
191 | if (remote_debugging) | |
192 | { | |
193 | if (from_tty) | |
194 | { | |
195 | printf ("Starting program: %s\n", exec_file); | |
196 | fflush (stdout); | |
197 | } | |
198 | } | |
199 | else | |
200 | { | |
201 | if (args) | |
202 | set_args_command (args); | |
203 | ||
204 | if (from_tty) | |
205 | { | |
206 | printf ("Starting program: %s%s\n", | |
207 | exec_file, inferior_args); | |
208 | fflush (stdout); | |
209 | } | |
210 | ||
211 | allargs = concat ("exec ", exec_file, inferior_args); | |
212 | inferior_pid = create_inferior (allargs, environ_vector (inferior_environ)); | |
213 | } | |
214 | ||
215 | clear_proceed_status (); | |
216 | ||
217 | start_inferior (); | |
218 | } | |
219 | \f | |
220 | void | |
221 | cont_command (proc_count_exp, from_tty) | |
222 | char *proc_count_exp; | |
223 | int from_tty; | |
224 | { | |
225 | ERROR_NO_INFERIOR; | |
226 | ||
227 | clear_proceed_status (); | |
228 | ||
229 | /* If have argument, set proceed count of breakpoint we stopped at. */ | |
230 | ||
231 | if (stop_breakpoint > 0 && proc_count_exp) | |
232 | { | |
233 | set_ignore_count (stop_breakpoint, | |
234 | parse_and_eval_address (proc_count_exp) - 1, | |
235 | from_tty); | |
236 | if (from_tty) | |
237 | printf (" "); | |
238 | } | |
239 | ||
240 | if (from_tty) | |
241 | printf ("Continuing.\n"); | |
242 | ||
243 | proceed (-1, -1, 0); | |
244 | } | |
245 | \f | |
246 | /* Step until outside of current statement. */ | |
247 | static void step_1 (); | |
248 | ||
249 | static void | |
250 | step_command (count_string) | |
251 | { | |
252 | step_1 (0, 0, count_string); | |
253 | } | |
254 | ||
255 | /* Likewise, but skip over subroutine calls as if single instructions. */ | |
256 | ||
257 | static void | |
258 | next_command (count_string) | |
259 | { | |
260 | step_1 (1, 0, count_string); | |
261 | } | |
262 | ||
263 | /* Likewise, but step only one instruction. */ | |
264 | ||
265 | static void | |
266 | stepi_command (count_string) | |
267 | { | |
268 | step_1 (0, 1, count_string); | |
269 | } | |
270 | ||
271 | static void | |
272 | nexti_command (count_string) | |
273 | { | |
274 | step_1 (1, 1, count_string); | |
275 | } | |
276 | ||
277 | static void | |
278 | step_1 (skip_subroutines, single_inst, count_string) | |
279 | int skip_subroutines; | |
280 | int single_inst; | |
281 | char *count_string; | |
282 | { | |
283 | register int count = 1; | |
284 | ||
285 | ERROR_NO_INFERIOR; | |
286 | count = count_string ? parse_and_eval_address (count_string) : 1; | |
287 | ||
288 | for (; count > 0; count--) | |
289 | { | |
290 | clear_proceed_status (); | |
291 | ||
292 | step_frame_address = FRAME_FP (get_current_frame ()); | |
293 | ||
294 | if (! single_inst) | |
295 | { | |
296 | find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end); | |
297 | if (step_range_end == 0) | |
298 | { | |
299 | int misc; | |
300 | ||
301 | misc = find_pc_misc_function (stop_pc); | |
302 | terminal_ours (); | |
303 | printf ("Current function has no line number information.\n"); | |
304 | fflush (stdout); | |
305 | ||
306 | /* No info or after _etext ("Can't happen") */ | |
307 | if (misc == -1 || misc == misc_function_count - 1) | |
308 | error ("No data available on pc function."); | |
309 | ||
310 | printf ("Single stepping until function exit.\n"); | |
311 | fflush (stdout); | |
312 | ||
313 | step_range_start = misc_function_vector[misc].address; | |
314 | step_range_end = misc_function_vector[misc + 1].address; | |
315 | } | |
316 | } | |
317 | else | |
318 | { | |
319 | /* Say we are stepping, but stop after one insn whatever it does. | |
320 | Don't step through subroutine calls even to undebuggable | |
321 | functions. */ | |
322 | step_range_start = step_range_end = 1; | |
323 | if (!skip_subroutines) | |
324 | step_over_calls = 0; | |
325 | } | |
326 | ||
327 | if (skip_subroutines) | |
328 | step_over_calls = 1; | |
329 | ||
330 | step_multi = (count > 1); | |
331 | proceed (-1, -1, 1); | |
332 | if (! stop_step) | |
333 | break; | |
334 | } | |
335 | } | |
336 | \f | |
337 | /* Continue program at specified address. */ | |
338 | ||
339 | static void | |
340 | jump_command (arg, from_tty) | |
341 | char *arg; | |
342 | int from_tty; | |
343 | { | |
344 | register CORE_ADDR addr; | |
345 | struct symtabs_and_lines sals; | |
346 | struct symtab_and_line sal; | |
347 | ||
348 | ERROR_NO_INFERIOR; | |
349 | ||
350 | if (!arg) | |
351 | error_no_arg ("starting address"); | |
352 | ||
353 | sals = decode_line_spec_1 (arg, 1); | |
354 | if (sals.nelts != 1) | |
355 | { | |
356 | error ("Unreasonable jump request"); | |
357 | } | |
358 | ||
359 | sal = sals.sals[0]; | |
360 | free (sals.sals); | |
361 | ||
362 | if (sal.symtab == 0 && sal.pc == 0) | |
363 | error ("No source file has been specified."); | |
364 | ||
365 | if (sal.pc == 0) | |
366 | sal.pc = find_line_pc (sal.symtab, sal.line); | |
367 | ||
368 | { | |
369 | struct symbol *fn = get_frame_function (get_current_frame ()); | |
370 | struct symbol *sfn = find_pc_function (sal.pc); | |
371 | if (fn != 0 && sfn != fn | |
372 | && ! query ("Line %d is not in `%s'. Jump anyway? ", | |
373 | sal.line, SYMBOL_NAME (fn))) | |
374 | error ("Not confirmed."); | |
375 | } | |
376 | ||
377 | if (sal.pc == 0) | |
378 | error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename); | |
379 | ||
380 | addr = sal.pc; | |
381 | ||
382 | clear_proceed_status (); | |
383 | ||
384 | if (from_tty) | |
385 | printf ("Continuing at 0x%x.\n", addr); | |
386 | ||
387 | proceed (addr, 0, 0); | |
388 | } | |
389 | ||
390 | /* Continue program giving it specified signal. */ | |
391 | ||
392 | static void | |
393 | signal_command (signum_exp, from_tty) | |
394 | char *signum_exp; | |
395 | int from_tty; | |
396 | { | |
397 | register int signum; | |
398 | ||
399 | dont_repeat (); /* Too dangerous. */ | |
400 | ERROR_NO_INFERIOR; | |
401 | ||
402 | if (!signum_exp) | |
403 | error_no_arg ("signal number"); | |
404 | ||
405 | signum = parse_and_eval_address (signum_exp); | |
406 | ||
407 | clear_proceed_status (); | |
408 | ||
409 | if (from_tty) | |
410 | printf ("Continuing with signal %d.\n", signum); | |
411 | ||
412 | proceed (stop_pc, signum, 0); | |
413 | } | |
414 | ||
415 | /* Execute a "stack dummy", a piece of code stored in the stack | |
416 | by the debugger to be executed in the inferior. | |
417 | ||
418 | To call: first, do PUSH_DUMMY_FRAME. | |
419 | Then push the contents of the dummy. It should end with a breakpoint insn. | |
420 | Then call here, passing address at which to start the dummy. | |
421 | ||
422 | The contents of all registers are saved before the dummy frame is popped | |
423 | and copied into the buffer BUFFER. | |
424 | ||
425 | The dummy's frame is automatically popped whenever that break is hit. | |
426 | If that is the first time the program stops, run_stack_dummy | |
427 | returns to its caller with that frame already gone. | |
428 | Otherwise, the caller never gets returned to. */ | |
429 | ||
430 | /* 4 => return instead of letting the stack dummy run. */ | |
431 | ||
432 | static int stack_dummy_testing = 0; | |
433 | ||
434 | void | |
435 | run_stack_dummy (addr, buffer) | |
436 | CORE_ADDR addr; | |
437 | REGISTER_TYPE *buffer; | |
438 | { | |
439 | /* Now proceed, having reached the desired place. */ | |
440 | clear_proceed_status (); | |
441 | #ifdef notdef | |
442 | if (stack_dummy_testing & 4) | |
443 | { | |
444 | POP_FRAME; | |
445 | return; | |
446 | } | |
447 | #endif | |
448 | proceed (addr, 0, 0); | |
449 | ||
450 | if (!stop_stack_dummy) | |
451 | error ("Cannot continue previously requested operation."); | |
452 | ||
453 | /* On return, the stack dummy has been popped already. */ | |
454 | ||
455 | read_register_bytes(0, buffer, REGISTER_BYTES); | |
456 | } | |
457 | \f | |
458 | /* Proceed until we reach the given line as argument or exit the | |
459 | function. When called with no argument, proceed until we reach a | |
460 | different source line with pc greater than our current one or exit | |
461 | the function. We skip calls in both cases. | |
462 | ||
463 | The effect of this command with an argument is identical to setting | |
464 | a momentary breakpoint at the line specified and executing | |
465 | "finish". | |
466 | ||
467 | Note that eventually this command should probably be changed so | |
468 | that only source lines are printed out when we hit the breakpoint | |
469 | we set. I'm going to postpone this until after a hopeful rewrite | |
470 | of wait_for_inferior and the proceed status code. -- randy */ | |
471 | ||
472 | void | |
473 | until_next_command (arg, from_tty) | |
474 | char *arg; | |
475 | int from_tty; | |
476 | { | |
477 | FRAME frame; | |
478 | CORE_ADDR pc; | |
479 | struct symbol *func; | |
480 | struct symtab_and_line sal; | |
481 | ||
482 | clear_proceed_status (); | |
483 | ||
484 | frame = get_current_frame (); | |
485 | ||
486 | /* Step until either exited from this function or greater | |
487 | than the current line (if in symbolic section) or pc (if | |
488 | not). */ | |
489 | ||
490 | pc = read_pc (); | |
491 | func = find_pc_function (pc); | |
492 | ||
493 | if (!func) | |
494 | { | |
495 | int misc_func = find_pc_misc_function (pc); | |
496 | ||
497 | if (misc_func != -1) | |
498 | error ("Execution is not within a known function."); | |
499 | ||
500 | step_range_start = misc_function_vector[misc_func].address; | |
501 | step_range_end = pc; | |
502 | } | |
503 | else | |
504 | { | |
505 | sal = find_pc_line (pc, 0); | |
506 | ||
507 | step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func)); | |
508 | step_range_end = sal.end; | |
509 | } | |
510 | ||
511 | step_over_calls = 1; | |
512 | step_frame_address = FRAME_FP (frame); | |
513 | ||
514 | step_multi = 0; /* Only one call to proceed */ | |
515 | ||
516 | proceed (-1, -1, 1); | |
517 | } | |
518 | ||
519 | void | |
520 | until_command (arg, from_tty) | |
521 | char *arg; | |
522 | int from_tty; | |
523 | { | |
524 | if (!have_inferior_p ()) | |
525 | error ("The program is not being run."); | |
526 | ||
527 | if (arg) | |
528 | until_break_command (arg, from_tty); | |
529 | else | |
530 | until_next_command (arg, from_tty); | |
531 | } | |
532 | \f | |
533 | /* "finish": Set a temporary breakpoint at the place | |
534 | the selected frame will return to, then continue. */ | |
535 | ||
536 | static void | |
537 | finish_command (arg, from_tty) | |
538 | char *arg; | |
539 | int from_tty; | |
540 | { | |
541 | struct symtab_and_line sal; | |
542 | register FRAME frame; | |
543 | struct frame_info *fi; | |
544 | register struct symbol *function; | |
545 | ||
546 | if (!have_inferior_p ()) | |
547 | error ("The program is not being run."); | |
548 | if (arg) | |
549 | error ("The \"finish\" command does not take any arguments."); | |
550 | ||
551 | frame = get_prev_frame (selected_frame); | |
552 | if (frame == 0) | |
553 | error ("\"finish\" not meaningful in the outermost frame."); | |
554 | ||
555 | clear_proceed_status (); | |
556 | ||
557 | fi = get_frame_info (frame); | |
558 | sal = find_pc_line (fi->pc, 0); | |
559 | sal.pc = fi->pc; | |
560 | set_momentary_breakpoint (sal, frame); | |
561 | ||
562 | /* Find the function we will return from. */ | |
563 | ||
564 | fi = get_frame_info (selected_frame); | |
565 | function = find_pc_function (fi->pc); | |
566 | ||
567 | if (from_tty) | |
568 | { | |
569 | printf ("Run till exit from "); | |
570 | print_selected_frame (); | |
571 | } | |
572 | ||
573 | proceed (-1, -1, 0); | |
574 | ||
575 | if (stop_breakpoint == -3 && function != 0) | |
576 | { | |
577 | struct type *value_type; | |
578 | register value val; | |
579 | CORE_ADDR funcaddr; | |
580 | extern char registers[]; | |
581 | ||
582 | value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function)); | |
583 | if (!value_type) | |
584 | fatal ("internal: finish_command: function has no target type"); | |
585 | ||
586 | if (TYPE_CODE (value_type) == TYPE_CODE_VOID) | |
587 | return; | |
588 | ||
589 | funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function)); | |
590 | ||
591 | val = value_being_returned (value_type, registers, | |
592 | using_struct_return (function, | |
593 | funcaddr, | |
594 | value_type)); | |
595 | ||
596 | printf ("Value returned is $%d = ", record_latest_value (val)); | |
597 | value_print (val, stdout, 0, Val_no_prettyprint); | |
598 | putchar ('\n'); | |
599 | } | |
600 | } | |
601 | \f | |
602 | static void | |
603 | program_info () | |
604 | { | |
605 | if (inferior_pid == 0) | |
606 | { | |
607 | printf ("The program being debugged is not being run.\n"); | |
608 | return; | |
609 | } | |
610 | ||
611 | printf ("Program being debugged is in process %d, stopped at 0x%x.\n", | |
612 | inferior_pid, stop_pc); | |
613 | if (stop_step) | |
614 | printf ("It stopped after being stepped.\n"); | |
615 | else if (stop_breakpoint > 0) | |
616 | printf ("It stopped at breakpoint %d.\n", stop_breakpoint); | |
617 | else if (stop_signal) | |
618 | printf ("It stopped with signal %d (%s).\n", | |
619 | stop_signal, sys_siglist[stop_signal]); | |
620 | ||
621 | printf ("\nType \"info stack\" or \"info reg\" for more information.\n"); | |
622 | } | |
623 | \f | |
624 | static void | |
625 | environment_info (var) | |
626 | char *var; | |
627 | { | |
628 | if (var) | |
629 | { | |
630 | register char *val = get_in_environ (inferior_environ, var); | |
631 | if (val) | |
632 | printf ("%s = %s\n", var, val); | |
633 | else | |
634 | printf ("Environment variable \"%s\" not defined.\n", var); | |
635 | } | |
636 | else | |
637 | { | |
638 | register char **vector = environ_vector (inferior_environ); | |
639 | while (*vector) | |
640 | printf ("%s\n", *vector++); | |
641 | } | |
642 | } | |
643 | ||
644 | static void | |
645 | set_environment_command (arg) | |
646 | char *arg; | |
647 | { | |
648 | register char *p, *val, *var; | |
649 | int nullset = 0; | |
650 | ||
651 | if (arg == 0) | |
652 | error_no_arg ("environment variable and value"); | |
653 | ||
654 | /* Find seperation between variable name and value */ | |
655 | p = (char *) index (arg, '='); | |
656 | val = (char *) index (arg, ' '); | |
657 | ||
658 | if (p != 0 && val != 0) | |
659 | { | |
660 | /* We have both a space and an equals. If the space is before the | |
661 | equals and the only thing between the two is more space, use | |
662 | the equals */ | |
663 | if (p > val) | |
664 | while (*val == ' ') | |
665 | val++; | |
666 | ||
667 | /* Take the smaller of the two. If there was space before the | |
668 | "=", they will be the same right now. */ | |
669 | p = arg + min (p - arg, val - arg); | |
670 | } | |
671 | else if (val != 0 && p == 0) | |
672 | p = val; | |
673 | ||
674 | if (p == arg) | |
675 | error_no_arg ("environment variable to set"); | |
676 | ||
677 | if (p == 0 || p[1] == 0) | |
678 | { | |
679 | nullset = 1; | |
680 | if (p == 0) | |
681 | p = arg + strlen (arg); /* So that savestring below will work */ | |
682 | } | |
683 | else | |
684 | { | |
685 | /* Not setting variable value to null */ | |
686 | val = p + 1; | |
687 | while (*val == ' ' || *val == '\t') | |
688 | val++; | |
689 | } | |
690 | ||
691 | while (p != arg && (p[-1] == ' ' || p[-1] == '\t')) p--; | |
692 | ||
693 | var = savestring (arg, p - arg); | |
694 | if (nullset) | |
695 | { | |
696 | printf ("Setting environment variable \"%s\" to null value.\n", var); | |
697 | set_in_environ (inferior_environ, var, ""); | |
698 | } | |
699 | else | |
700 | set_in_environ (inferior_environ, var, val); | |
701 | free (var); | |
702 | } | |
703 | ||
704 | static void | |
705 | unset_environment_command (var, from_tty) | |
706 | char *var; | |
707 | int from_tty; | |
708 | { | |
709 | if (var == 0) | |
710 | /* If there is no argument, delete all environment variables. | |
711 | Ask for confirmation if reading from the terminal. */ | |
712 | if (!from_tty || query ("Delete all environment variables? ")) | |
713 | { | |
714 | free_environ (inferior_environ); | |
715 | inferior_environ = make_environ (); | |
716 | } | |
717 | ||
718 | unset_in_environ (inferior_environ, var); | |
719 | } | |
720 | \f | |
721 | /* Read an integer from debugged memory, given address and number of bytes. */ | |
722 | ||
723 | long | |
724 | read_memory_integer (memaddr, len) | |
725 | CORE_ADDR memaddr; | |
726 | int len; | |
727 | { | |
728 | char cbuf; | |
729 | short sbuf; | |
730 | int ibuf; | |
731 | long lbuf; | |
732 | int result_err; | |
733 | extern int sys_nerr; | |
734 | extern char *sys_errlist[]; | |
735 | ||
736 | if (len == sizeof (char)) | |
737 | { | |
738 | result_err = read_memory (memaddr, &cbuf, len); | |
739 | if (result_err) | |
740 | error ("Error reading memory address 0x%x: %s (%d).", | |
741 | memaddr, (result_err < sys_nerr ? | |
742 | sys_errlist[result_err] : | |
743 | "uknown error"), result_err); | |
744 | return cbuf; | |
745 | } | |
746 | if (len == sizeof (short)) | |
747 | { | |
748 | result_err = read_memory (memaddr, &sbuf, len); | |
749 | if (result_err) | |
750 | error ("Error reading memory address 0x%x: %s (%d).", | |
751 | memaddr, (result_err < sys_nerr ? | |
752 | sys_errlist[result_err] : | |
753 | "uknown error"), result_err); | |
754 | return sbuf; | |
755 | } | |
756 | if (len == sizeof (int)) | |
757 | { | |
758 | result_err = read_memory (memaddr, &ibuf, len); | |
759 | if (result_err) | |
760 | error ("Error reading memory address 0x%x: %s (%d).", | |
761 | memaddr, (result_err < sys_nerr ? | |
762 | sys_errlist[result_err] : | |
763 | "uknown error"), result_err); | |
764 | return ibuf; | |
765 | } | |
766 | if (len == sizeof (lbuf)) | |
767 | { | |
768 | result_err = read_memory (memaddr, &lbuf, len); | |
769 | if (result_err) | |
770 | error ("Error reading memory address 0x%x: %s (%d).", | |
771 | memaddr, (result_err < sys_nerr ? | |
772 | sys_errlist[result_err] : | |
773 | "uknown error"), result_err); | |
774 | return lbuf; | |
775 | } | |
776 | error ("Cannot handle integers of %d bytes.", len); | |
777 | } | |
778 | \f | |
779 | CORE_ADDR | |
780 | read_pc () | |
781 | { | |
782 | return (CORE_ADDR) read_register (PC_REGNUM); | |
783 | } | |
784 | ||
785 | void | |
786 | write_pc (val) | |
787 | CORE_ADDR val; | |
788 | { | |
789 | write_register (PC_REGNUM, (long) val); | |
790 | #ifdef NPC_REGNUM | |
791 | write_register (NPC_REGNUM, (long) val+4); | |
792 | #endif | |
793 | } | |
794 | ||
795 | char *reg_names[] = REGISTER_NAMES; | |
796 | ||
797 | #if !defined (DO_REGISTERS_INFO) | |
798 | static void | |
799 | print_one_register(i) | |
800 | int i; | |
801 | { | |
802 | unsigned char raw_buffer[MAX_REGISTER_RAW_SIZE]; | |
803 | unsigned char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE]; | |
804 | REGISTER_TYPE val; | |
805 | ||
806 | /* Get the data in raw format, then convert also to virtual format. */ | |
807 | read_relative_register_raw_bytes (i, raw_buffer); | |
808 | REGISTER_CONVERT_TO_VIRTUAL (i, raw_buffer, virtual_buffer); | |
809 | ||
810 | fputs_filtered (reg_names[i], stdout); | |
811 | print_spaces_filtered (15 - strlen (reg_names[i]), stdout); | |
812 | ||
813 | /* If virtual format is floating, print it that way. */ | |
814 | if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT | |
815 | && ! INVALID_FLOAT (virtual_buffer, REGISTER_VIRTUAL_SIZE (i))) | |
816 | val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, | |
817 | stdout, 0, 1, 0, Val_pretty_default); | |
818 | /* Else if virtual format is too long for printf, | |
819 | print in hex a byte at a time. */ | |
820 | else if (REGISTER_VIRTUAL_SIZE (i) > sizeof (long)) | |
821 | { | |
822 | register int j; | |
823 | printf_filtered ("0x"); | |
824 | for (j = 0; j < REGISTER_VIRTUAL_SIZE (i); j++) | |
825 | printf_filtered ("%02x", virtual_buffer[j]); | |
826 | } | |
827 | /* Else print as integer in hex and in decimal. */ | |
828 | else | |
829 | { | |
830 | long val; | |
831 | ||
832 | bcopy (virtual_buffer, &val, sizeof (long)); | |
833 | if (val == 0) | |
834 | printf_filtered ("0"); | |
835 | else | |
836 | printf_filtered ("0x%08x %d", val, val); | |
837 | } | |
838 | ||
839 | /* If register has different raw and virtual formats, | |
840 | print the raw format in hex now. */ | |
841 | ||
842 | if (REGISTER_CONVERTIBLE (i)) | |
843 | { | |
844 | register int j; | |
845 | ||
846 | printf_filtered (" (raw 0x"); | |
847 | for (j = 0; j < REGISTER_RAW_SIZE (i); j++) | |
848 | printf_filtered ("%02x", raw_buffer[j]); | |
849 | printf_filtered (")"); | |
850 | } | |
851 | printf_filtered ("\n"); | |
852 | } | |
853 | ||
854 | ||
855 | /* Print out the machine register regnum. If regnum is -1, | |
856 | print all registers. | |
857 | For most machines, having all_registers_info() print the | |
858 | register(s) one per line is good enough. If a different format | |
859 | is required, (eg, for SPARC or Pyramid 90x, which both have | |
860 | lots of regs), or there is an existing convention for showing | |
861 | all the registers, define the macro DO_REGISTERS_INFO(regnum) | |
862 | to provide that format. */ | |
863 | static void | |
864 | do_registers_info (regnum, fpregs) | |
865 | int regnum; | |
866 | int fpregs; | |
867 | { | |
868 | register int i; | |
869 | ||
870 | if (regnum >= 0) { | |
871 | print_one_register(regnum); | |
872 | return; | |
873 | } | |
874 | #ifdef notdef | |
875 | printf_filtered ( | |
876 | "Register Contents (relative to selected stack frame)\n\n"); | |
877 | #endif | |
878 | for (i = 0; i < NUM_REGS; i++) | |
879 | if (TYPE_CODE(REGISTER_VIRTUAL_TYPE(i)) != TYPE_CODE_FLT || | |
880 | fpregs) | |
881 | print_one_register(i); | |
882 | } | |
883 | #endif /* no DO_REGISTERS_INFO. */ | |
884 | ||
885 | static void | |
886 | registers_info (addr_exp, fpregs) | |
887 | char *addr_exp; | |
888 | int fpregs; | |
889 | { | |
890 | int regnum; | |
891 | ||
892 | if (!have_inferior_p () && !have_core_file_p ()) | |
893 | error ("No inferior or core file"); | |
894 | ||
895 | if (addr_exp) | |
896 | { | |
897 | if (*addr_exp >= '0' && *addr_exp <= '9') | |
898 | regnum = atoi (addr_exp); | |
899 | else | |
900 | { | |
901 | register char *p = addr_exp; | |
902 | if (p[0] == '$') | |
903 | p++; | |
904 | for (regnum = 0; regnum < NUM_REGS; regnum++) | |
905 | if (!strcmp (p, reg_names[regnum])) | |
906 | break; | |
907 | if (regnum == NUM_REGS) | |
908 | error ("%s: invalid register name.", addr_exp); | |
909 | } | |
910 | } | |
911 | else | |
912 | regnum = -1; | |
913 | ||
914 | #ifdef DO_REGISTERS_INFO | |
915 | DO_REGISTERS_INFO(regnum); | |
916 | #else | |
917 | do_registers_info(regnum, fpregs); | |
918 | #endif | |
919 | } | |
920 | ||
921 | static void | |
922 | all_registers_info (addr_exp) | |
923 | char *addr_exp; | |
924 | { | |
925 | registers_info(addr_exp, 1); | |
926 | } | |
927 | ||
928 | static void | |
929 | nofp_registers_info (addr_exp) | |
930 | char *addr_exp; | |
931 | { | |
932 | registers_info(addr_exp, 0); | |
933 | } | |
934 | ||
935 | \f | |
936 | #ifdef ATTACH_DETACH | |
937 | #define PROCESS_ATTACH_ALLOWED 1 | |
938 | #else | |
939 | #define PROCESS_ATTACH_ALLOWED 0 | |
940 | #endif | |
941 | /* | |
942 | * TODO: | |
943 | * Should save/restore the tty state since it might be that the | |
944 | * program to be debugged was started on this tty and it wants | |
945 | * the tty in some state other than what we want. If it's running | |
946 | * on another terminal or without a terminal, then saving and | |
947 | * restoring the tty state is a harmless no-op. | |
948 | * This only needs to be done if we are attaching to a process. | |
949 | */ | |
950 | ||
951 | /* | |
952 | * attach_command -- | |
953 | * takes a program started up outside of gdb and ``attaches'' to it. | |
954 | * This stops it cold in its tracks and allows us to start tracing it. | |
955 | * For this to work, we must be able to send the process a | |
956 | * signal and we must have the same effective uid as the program. | |
957 | */ | |
958 | static void | |
959 | attach_command (args, from_tty) | |
960 | char *args; | |
961 | int from_tty; | |
962 | { | |
963 | char *exec_file; | |
964 | int pid; | |
965 | int remote = 0; | |
966 | ||
967 | dont_repeat(); | |
968 | ||
969 | if (!args) | |
970 | error_no_arg ("process-id or device file to attach"); | |
971 | ||
972 | while (*args == ' ' || *args == '\t') args++; | |
973 | ||
974 | if (args[0] < '0' || args[0] > '9') | |
975 | remote = 1; | |
976 | else | |
977 | #ifndef ATTACH_DETACH | |
978 | error ("Can't attach to a process on this machine."); | |
979 | #else | |
980 | pid = atoi (args); | |
981 | #endif | |
982 | ||
983 | if (inferior_pid) | |
984 | { | |
985 | if (query ("A program is being debugged already. Kill it? ")) | |
986 | kill_inferior (); | |
987 | else | |
988 | error ("Inferior not killed."); | |
989 | } | |
990 | ||
991 | exec_file = (char *) get_exec_file (1); | |
992 | ||
993 | if (from_tty) | |
994 | { | |
995 | if (remote) | |
996 | printf ("Attaching remote machine\n"); | |
997 | else | |
998 | printf ("Attaching program: %s pid %d\n", | |
999 | exec_file, pid); | |
1000 | fflush (stdout); | |
1001 | } | |
1002 | ||
1003 | if (remote) | |
1004 | { | |
1005 | remote_open (args, from_tty); | |
1006 | start_remote (); | |
1007 | } | |
1008 | #ifdef ATTACH_DETACH | |
1009 | else | |
1010 | attach_program (pid); | |
1011 | #endif | |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * detach_command -- | |
1016 | * takes a program previously attached to and detaches it. | |
1017 | * The program resumes execution and will no longer stop | |
1018 | * on signals, etc. We better not have left any breakpoints | |
1019 | * in the program or it'll die when it hits one. For this | |
1020 | * to work, it may be necessary for the process to have been | |
1021 | * previously attached. It *might* work if the program was | |
1022 | * started via the normal ptrace (PTRACE_TRACEME). | |
1023 | */ | |
1024 | ||
1025 | static void | |
1026 | detach_command (args, from_tty) | |
1027 | char *args; | |
1028 | int from_tty; | |
1029 | { | |
1030 | int signal = 0; | |
1031 | ||
1032 | #ifdef ATTACH_DETACH | |
1033 | if (inferior_pid && !remote_debugging) | |
1034 | { | |
1035 | if (from_tty) | |
1036 | { | |
1037 | char *exec_file = (char *)get_exec_file (0); | |
1038 | if (exec_file == 0) | |
1039 | exec_file = ""; | |
1040 | printf ("Detaching program: %s pid %d\n", | |
1041 | exec_file, inferior_pid); | |
1042 | fflush (stdout); | |
1043 | } | |
1044 | if (args) | |
1045 | signal = atoi (args); | |
1046 | ||
1047 | detach (signal); | |
1048 | inferior_pid = 0; | |
1049 | } | |
1050 | else | |
1051 | #endif | |
1052 | { | |
1053 | if (!remote_debugging) | |
1054 | error ("Not currently attached to subsidiary or remote process."); | |
1055 | ||
1056 | if (args) | |
1057 | error ("Argument given to \"detach\" when remotely debugging."); | |
1058 | ||
1059 | inferior_pid = 0; | |
1060 | remote_close (from_tty); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | /* ARGSUSED */ | |
1065 | static void | |
1066 | float_info (addr_exp) | |
1067 | char *addr_exp; | |
1068 | { | |
1069 | #ifdef FLOAT_INFO | |
1070 | FLOAT_INFO; | |
1071 | #else | |
1072 | printf ("No floating point info available for this processor.\n"); | |
1073 | #endif | |
1074 | } | |
1075 | \f | |
1076 | extern struct cmd_list_element *setlist, *deletelist; | |
1077 | ||
1078 | void | |
1079 | _initialize_infcmd () | |
1080 | { | |
1081 | add_com ("tty", class_run, tty_command, | |
1082 | "Set terminal for future runs of program being debugged."); | |
1083 | ||
1084 | add_cmd ("args", class_run, set_args_command, | |
1085 | "Specify arguments to give program being debugged when it is started.\n\ | |
1086 | Follow this command with any number of args, to be passed to the program.", | |
1087 | &setlist); | |
1088 | ||
1089 | add_info ("environment", environment_info, | |
1090 | "The environment to give the program, or one variable's value.\n\ | |
1091 | With an argument VAR, prints the value of environment variable VAR to\n\ | |
1092 | give the program being debugged. With no arguments, prints the entire\n\ | |
1093 | environment to be given to the program."); | |
1094 | ||
1095 | add_cmd ("environment", class_run, unset_environment_command, | |
1096 | "Cancel environment variable VAR for the program.\n\ | |
1097 | This does not affect the program until the next \"run\" command.", | |
1098 | &deletelist); | |
1099 | ||
1100 | add_cmd ("environment", class_run, set_environment_command, | |
1101 | "Set environment variable value to give the program.\n\ | |
1102 | Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\ | |
1103 | VALUES of environment variables are uninterpreted strings.\n\ | |
1104 | This does not affect the program until the next \"run\" command.", | |
1105 | &setlist); | |
1106 | ||
1107 | #ifdef ATTACH_DETACH | |
1108 | add_com ("attach", class_run, attach_command, | |
1109 | "Attach to a process that was started up outside of GDB.\n\ | |
1110 | This command may take as argument a process id or a device file.\n\ | |
1111 | For a process id, you must have permission to send the process a signal,\n\ | |
1112 | and it must have the same effective uid as the debugger.\n\ | |
1113 | For a device file, the file must be a connection to a remote debug server.\n\n\ | |
1114 | Before using \"attach\", you must use the \"exec-file\" command\n\ | |
1115 | to specify the program running in the process,\n\ | |
1116 | and the \"symbol-file\" command to load its symbol table."); | |
1117 | #else | |
1118 | add_com ("attach", class_run, attach_command, | |
1119 | "Attach to a process that was started up outside of GDB.\n\ | |
1120 | This commands takes as an argument the name of a device file.\n\ | |
1121 | This file must be a connection to a remote debug server.\n\n\ | |
1122 | Before using \"attach\", you must use the \"exec-file\" command\n\ | |
1123 | to specify the program running in the process,\n\ | |
1124 | and the \"symbol-file\" command to load its symbol table."); | |
1125 | #endif | |
1126 | add_com ("detach", class_run, detach_command, | |
1127 | "Detach the process previously attached.\n\ | |
1128 | The process is no longer traced and continues its execution."); | |
1129 | ||
1130 | add_com ("signal", class_run, signal_command, | |
1131 | "Continue program giving it signal number SIGNUMBER."); | |
1132 | ||
1133 | add_com ("stepi", class_run, stepi_command, | |
1134 | "Step one instruction exactly.\n\ | |
1135 | Argument N means do this N times (or till program stops for another reason)."); | |
1136 | add_com_alias ("si", "stepi", class_alias, 0); | |
1137 | ||
1138 | add_com ("nexti", class_run, nexti_command, | |
1139 | "Step one instruction, but proceed through subroutine calls.\n\ | |
1140 | Argument N means do this N times (or till program stops for another reason)."); | |
1141 | add_com_alias ("ni", "nexti", class_alias, 0); | |
1142 | ||
1143 | add_com ("finish", class_run, finish_command, | |
1144 | "Execute until selected stack frame returns.\n\ | |
1145 | Upon return, the value returned is printed and put in the value history."); | |
1146 | ||
1147 | add_com ("next", class_run, next_command, | |
1148 | "Step program, proceeding through subroutine calls.\n\ | |
1149 | Like the \"step\" command as long as subroutine calls do not happen;\n\ | |
1150 | when they do, the call is treated as one instruction.\n\ | |
1151 | Argument N means do this N times (or till program stops for another reason)."); | |
1152 | add_com_alias ("n", "next", class_run, 1); | |
1153 | ||
1154 | add_com ("step", class_run, step_command, | |
1155 | "Step program until it reaches a different source line.\n\ | |
1156 | Argument N means do this N times (or till program stops for another reason)."); | |
1157 | add_com_alias ("s", "step", class_run, 1); | |
1158 | ||
1159 | add_com ("until", class_run, until_command, | |
1160 | "Execute until the program reaches a source line greater than the current\n\ | |
1161 | or a specified line or address or function (same args as break command).\n\ | |
1162 | Execution will also stop upon exit from the current stack frame."); | |
1163 | add_com_alias ("u", "until", class_run, 1); | |
1164 | ||
1165 | add_com ("jump", class_run, jump_command, | |
1166 | "Continue program being debugged at specified line or address.\n\ | |
1167 | Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\ | |
1168 | for an address to start at."); | |
1169 | ||
1170 | add_com ("cont", class_run, cont_command, | |
1171 | "Continue program being debugged, after signal or breakpoint.\n\ | |
1172 | If proceeding from breakpoint, a number N may be used as an argument:\n\ | |
1173 | then the same breakpoint won't break until the Nth time it is reached."); | |
1174 | add_com_alias ("c", "cont", class_run, 1); | |
1175 | ||
1176 | add_com ("run", class_run, run_command, | |
1177 | "Start debugged program. You may specify arguments to give it.\n\ | |
1178 | Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\ | |
1179 | Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\ | |
1180 | With no arguments, uses arguments last specified (with \"run\" or \"set args\".\n\ | |
1181 | To cancel previous arguments and run with no arguments,\n\ | |
1182 | use \"set args\" without arguments."); | |
1183 | add_com_alias ("r", "run", class_run, 1); | |
1184 | ||
1185 | add_info ("registers", nofp_registers_info, | |
1186 | "List of registers and their contents, for selected stack frame.\n\ | |
1187 | Register name as argument means describe only that register.\n\ | |
1188 | (Doesn't display floating point registers; use 'info all-registers'.)\n"); | |
1189 | ||
1190 | add_info ("all-registers", all_registers_info, | |
1191 | "List of registers and their contents, for selected stack frame.\n\ | |
1192 | Register name as argument means describe only that register."); | |
1193 | ||
1194 | add_info ("program", program_info, | |
1195 | "Execution status of the program."); | |
1196 | ||
1197 | add_info ("float", float_info, | |
1198 | "Print the status of the floating point unit\n"); | |
1199 | ||
1200 | inferior_args = savestring (" ", 1); /* By default, no args. */ | |
1201 | inferior_environ = make_environ (); | |
1202 | init_environ (inferior_environ); | |
1203 | } | |
1204 |