]>
Commit | Line | Data |
---|---|---|
e49d4fa6 SS |
1 | /* Native debugging support for Intel x86 running DJGPP. |
2 | Copyright 1997, 1999 Free Software Foundation, Inc. | |
3 | Written by Robert Hoehne. | |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
e49d4fa6 | 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. | |
e49d4fa6 | 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. | |
e49d4fa6 | 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. */ | |
e49d4fa6 SS |
21 | |
22 | #include <fcntl.h> | |
23 | ||
24 | #include "defs.h" | |
25 | #include "frame.h" /* required by inferior.h */ | |
26 | #include "inferior.h" | |
27 | #include "target.h" | |
28 | #include "wait.h" | |
29 | #include "gdbcore.h" | |
30 | #include "command.h" | |
31 | #include "floatformat.h" | |
32 | ||
c5aa993b | 33 | #include <stdio.h> /* required for __DJGPP_MINOR__ */ |
e49d4fa6 SS |
34 | #include <stdlib.h> |
35 | #include <string.h> | |
36 | #include <unistd.h> | |
37 | #include <debug/v2load.h> | |
38 | #include <debug/dbgcom.h> | |
39 | ||
b83266a0 SS |
40 | #if __DJGPP_MINOR__ < 3 |
41 | /* This code will be provided from DJGPP 2.03 on. Until then I code it | |
42 | here */ | |
c5aa993b JM |
43 | typedef struct |
44 | { | |
45 | unsigned short sig0; | |
46 | unsigned short sig1; | |
47 | unsigned short sig2; | |
48 | unsigned short sig3; | |
49 | unsigned short exponent:15; | |
50 | unsigned short sign:1; | |
51 | } | |
52 | NPXREG; | |
53 | ||
54 | typedef struct | |
55 | { | |
56 | unsigned int control; | |
57 | unsigned int status; | |
58 | unsigned int tag; | |
59 | unsigned int eip; | |
60 | unsigned int cs; | |
61 | unsigned int dataptr; | |
62 | unsigned int datasel; | |
63 | NPXREG reg[8]; | |
64 | } | |
65 | NPX; | |
b83266a0 SS |
66 | |
67 | static NPX npx; | |
68 | ||
c5aa993b JM |
69 | static void save_npx (void); /* Save the FPU of the debugged program */ |
70 | static void load_npx (void); /* Restore the FPU of the debugged program */ | |
b83266a0 SS |
71 | |
72 | /* ------------------------------------------------------------------------- */ | |
73 | /* Store the contents of the NPX in the global variable `npx'. */ | |
c5aa993b | 74 | /* *INDENT-OFF* */ |
b83266a0 SS |
75 | |
76 | static void | |
77 | save_npx (void) | |
78 | { | |
79 | asm ("inb $0xa0, %%al | |
c5aa993b JM |
80 | testb $0x20, %%al |
81 | jz 1f | |
82 | xorb %% al, %%al | |
83 | outb %% al, $0xf0 | |
84 | movb $0x20, %%al | |
85 | outb %% al, $0xa0 | |
86 | outb %% al, $0x20 | |
b83266a0 | 87 | 1: |
c5aa993b JM |
88 | fnsave % 0 |
89 | fwait " | |
90 | : "=m" (npx) | |
91 | : /* No input */ | |
92 | : "%eax"); | |
b83266a0 | 93 | } |
c5aa993b JM |
94 | |
95 | /* *INDENT-ON* */ | |
96 | ||
97 | ||
98 | ||
99 | ||
100 | ||
b83266a0 SS |
101 | /* ------------------------------------------------------------------------- */ |
102 | /* Reload the contents of the NPX from the global variable `npx'. */ | |
103 | ||
104 | static void | |
105 | load_npx (void) | |
106 | { | |
c5aa993b | 107 | asm ("frstor %0":"=m" (npx)); |
b83266a0 SS |
108 | } |
109 | #endif /* __DJGPP_MINOR < 3 */ | |
110 | ||
e49d4fa6 SS |
111 | extern void _initialize_go32_nat (void); |
112 | ||
113 | struct env387 | |
c5aa993b JM |
114 | { |
115 | unsigned short control; | |
116 | unsigned short r0; | |
117 | unsigned short status; | |
118 | unsigned short r1; | |
119 | unsigned short tag; | |
120 | unsigned short r2; | |
121 | unsigned long eip; | |
122 | unsigned short code_seg; | |
123 | unsigned short opcode; | |
124 | unsigned long operand; | |
125 | unsigned short operand_seg; | |
126 | unsigned short r3; | |
127 | unsigned char regs[8][10]; | |
128 | }; | |
e49d4fa6 SS |
129 | |
130 | extern char **environ; | |
131 | ||
132 | #define SOME_PID 42 | |
133 | ||
e49d4fa6 | 134 | static int prog_has_started = 0; |
c5aa993b JM |
135 | static void print_387_status (unsigned short status, struct env387 *ep); |
136 | static void go32_open (char *name, int from_tty); | |
137 | static void go32_close (int quitting); | |
138 | static void go32_attach (char *args, int from_tty); | |
139 | static void go32_detach (char *args, int from_tty); | |
140 | static void go32_resume (int pid, int step, enum target_signal siggnal); | |
141 | static int go32_wait (int pid, struct target_waitstatus *status); | |
142 | static void go32_fetch_registers (int regno); | |
143 | static void store_register (int regno); | |
144 | static void go32_store_registers (int regno); | |
145 | static void go32_prepare_to_store (void); | |
146 | static int go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, | |
147 | int write, struct target_ops *target); | |
148 | static void go32_files_info (struct target_ops *target); | |
149 | static void go32_stop (void); | |
150 | static void go32_kill_inferior (void); | |
151 | static void go32_create_inferior (char *exec_file, char *args, char **env); | |
152 | static void go32_mourn_inferior (void); | |
153 | static int go32_can_run (void); | |
154 | static void ignore (void); | |
155 | static void ignore2 (char *a, int b); | |
b83266a0 | 156 | static int go32_insert_aligned_watchpoint (int pid, CORE_ADDR waddr, |
c5aa993b | 157 | CORE_ADDR addr, int len, int rw); |
b83266a0 | 158 | static int go32_insert_nonaligned_watchpoint (int pid, CORE_ADDR waddr, |
c5aa993b | 159 | CORE_ADDR addr, int len, int rw); |
b83266a0 SS |
160 | |
161 | static struct target_ops go32_ops; | |
c5aa993b JM |
162 | static void go32_terminal_init (void); |
163 | static void go32_terminal_inferior (void); | |
164 | static void go32_terminal_ours (void); | |
e49d4fa6 SS |
165 | |
166 | static void | |
167 | print_387_status (unsigned short status, struct env387 *ep) | |
168 | { | |
169 | int i; | |
170 | int bothstatus; | |
171 | int top; | |
172 | int fpreg; | |
173 | ||
174 | bothstatus = ((status != 0) && (ep->status != 0)); | |
175 | if (status != 0) | |
176 | { | |
177 | if (bothstatus) | |
178 | printf_unfiltered ("u: "); | |
179 | print_387_status_word (status); | |
180 | } | |
181 | ||
182 | if (ep->status != 0) | |
183 | { | |
184 | if (bothstatus) | |
185 | printf_unfiltered ("e: "); | |
186 | print_387_status_word (ep->status); | |
187 | } | |
188 | ||
189 | print_387_control_word (ep->control & 0xffff); | |
190 | printf_unfiltered ("last exception: "); | |
191 | printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode)); | |
192 | printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg)); | |
193 | printf_unfiltered ("%s; ", local_hex_string (ep->eip)); | |
194 | printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg)); | |
195 | printf_unfiltered (":%s\n", local_hex_string (ep->operand)); | |
196 | ||
197 | top = (ep->status >> 11) & 7; | |
198 | ||
199 | printf_unfiltered ("regno tag msb lsb value\n"); | |
200 | for (fpreg = 0; fpreg < 8; fpreg++) | |
201 | { | |
202 | long double val; | |
203 | ||
204 | printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg); | |
205 | ||
206 | switch ((ep->tag >> (fpreg * 2)) & 3) | |
207 | { | |
208 | case 0: | |
209 | printf_unfiltered ("valid "); | |
210 | break; | |
211 | case 1: | |
212 | printf_unfiltered ("zero "); | |
213 | break; | |
214 | case 2: | |
215 | printf_unfiltered ("trap "); | |
216 | break; | |
217 | case 3: | |
218 | printf_unfiltered ("empty "); | |
219 | break; | |
220 | } | |
221 | for (i = 0; i < 8; i++) | |
222 | printf_unfiltered ("%02x", ep->regs[fpreg][i]); | |
223 | ||
224 | REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM + fpreg, builtin_type_long_double, | |
225 | &ep->regs[fpreg], &val); | |
226 | ||
227 | printf_unfiltered (" %LG\n", val); | |
228 | } | |
229 | } | |
230 | ||
231 | void | |
232 | i386_go32_float_info (void) | |
233 | { | |
234 | print_387_status (0, (struct env387 *) &npx); | |
235 | } | |
236 | ||
237 | #define r_ofs(x) ((int)(&(((TSS *)0)->x))) | |
238 | ||
239 | static struct | |
240 | { | |
241 | int tss_ofs; | |
242 | int size; | |
243 | } | |
244 | regno_mapping[] = | |
245 | { | |
246 | r_ofs (tss_eax), 4, | |
c5aa993b JM |
247 | r_ofs (tss_ecx), 4, |
248 | r_ofs (tss_edx), 4, | |
249 | r_ofs (tss_ebx), 4, | |
250 | r_ofs (tss_esp), 4, | |
251 | r_ofs (tss_ebp), 4, | |
252 | r_ofs (tss_esi), 4, | |
253 | r_ofs (tss_edi), 4, | |
254 | r_ofs (tss_eip), 4, | |
255 | r_ofs (tss_eflags), 4, | |
256 | r_ofs (tss_cs), 2, | |
257 | r_ofs (tss_ss), 2, | |
258 | r_ofs (tss_ds), 2, | |
259 | r_ofs (tss_es), 2, | |
260 | r_ofs (tss_fs), 2, | |
261 | r_ofs (tss_gs), 2, | |
262 | 0, 10, | |
263 | 1, 10, | |
264 | 2, 10, | |
265 | 3, 10, | |
266 | 4, 10, | |
267 | 5, 10, | |
268 | 6, 10, | |
269 | 7, 10, | |
270 | 0, 2, | |
271 | 4, 2, | |
272 | 8, 2, | |
273 | 12, 4, | |
274 | 16, 2, | |
275 | 20, 4, | |
276 | 24, 2 | |
e49d4fa6 SS |
277 | }; |
278 | ||
279 | static struct | |
280 | { | |
281 | int go32_sig; | |
282 | int gdb_sig; | |
283 | } | |
284 | sig_map[] = | |
285 | { | |
286 | 0, TARGET_SIGNAL_FPE, | |
c5aa993b JM |
287 | 1, TARGET_SIGNAL_TRAP, |
288 | 2, TARGET_SIGNAL_UNKNOWN, | |
289 | 3, TARGET_SIGNAL_TRAP, | |
290 | 4, TARGET_SIGNAL_FPE, | |
291 | 5, TARGET_SIGNAL_SEGV, | |
292 | 6, TARGET_SIGNAL_ILL, | |
293 | 7, TARGET_SIGNAL_FPE, | |
294 | 8, TARGET_SIGNAL_SEGV, | |
295 | 9, TARGET_SIGNAL_SEGV, | |
296 | 10, TARGET_SIGNAL_BUS, | |
297 | 11, TARGET_SIGNAL_SEGV, | |
298 | 12, TARGET_SIGNAL_SEGV, | |
299 | 13, TARGET_SIGNAL_ABRT, | |
300 | 14, TARGET_SIGNAL_SEGV, | |
301 | 16, TARGET_SIGNAL_FPE, | |
302 | 31, TARGET_SIGNAL_ILL, | |
303 | 0x75, TARGET_SIGNAL_FPE, | |
304 | 0x79, TARGET_SIGNAL_INT, | |
305 | 0x1b, TARGET_SIGNAL_INT, | |
306 | -1, -1 | |
e49d4fa6 SS |
307 | }; |
308 | ||
309 | static void | |
310 | go32_open (char *name, int from_tty) | |
311 | { | |
312 | printf_unfiltered ("Use the `run' command to run go32 programs\n"); | |
313 | } | |
314 | ||
315 | static void | |
316 | go32_close (int quitting) | |
317 | { | |
318 | } | |
319 | ||
320 | static void | |
321 | go32_attach (char *args, int from_tty) | |
322 | { | |
323 | printf_unfiltered ("Use the `run' command to run go32 programs\n"); | |
324 | } | |
325 | ||
326 | static void | |
327 | go32_detach (char *args, int from_tty) | |
328 | { | |
329 | } | |
330 | ||
331 | static int resume_is_step; | |
332 | ||
333 | static void | |
334 | go32_resume (int pid, int step, enum target_signal siggnal) | |
c5aa993b JM |
335 | { |
336 | resume_is_step = step; | |
337 | } | |
e49d4fa6 SS |
338 | |
339 | static int | |
340 | go32_wait (int pid, struct target_waitstatus *status) | |
341 | { | |
342 | int i; | |
343 | ||
344 | if (resume_is_step) | |
345 | a_tss.tss_eflags |= 0x0100; | |
346 | else | |
347 | a_tss.tss_eflags &= 0xfeff; | |
348 | ||
b83266a0 SS |
349 | #if __DJGPP_MINOR__ < 3 |
350 | save_npx (); | |
351 | #endif | |
e49d4fa6 | 352 | run_child (); |
b83266a0 SS |
353 | #if __DJGPP_MINOR__ < 3 |
354 | load_npx (); | |
355 | #endif | |
e49d4fa6 SS |
356 | |
357 | if (a_tss.tss_irqn == 0x21) | |
358 | { | |
359 | status->kind = TARGET_WAITKIND_EXITED; | |
360 | status->value.integer = a_tss.tss_eax & 0xff; | |
361 | } | |
362 | else | |
363 | { | |
364 | status->value.sig = TARGET_SIGNAL_UNKNOWN; | |
365 | status->kind = TARGET_WAITKIND_STOPPED; | |
366 | for (i = 0; sig_map[i].go32_sig != -1; i++) | |
367 | { | |
368 | if (a_tss.tss_irqn == sig_map[i].go32_sig) | |
369 | { | |
370 | if ((status->value.sig = sig_map[i].gdb_sig) != | |
371 | TARGET_SIGNAL_TRAP) | |
372 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
373 | break; | |
374 | } | |
375 | } | |
376 | } | |
377 | return SOME_PID; | |
378 | } | |
379 | ||
380 | static void | |
381 | go32_fetch_registers (int regno) | |
382 | { | |
c5aa993b | 383 | /*JHW */ |
e49d4fa6 SS |
384 | int end_reg = regno + 1; /* just one reg initially */ |
385 | ||
386 | if (regno < 0) /* do the all registers */ | |
387 | { | |
388 | regno = 0; /* start at first register */ | |
389 | /* # regs in table */ | |
390 | end_reg = sizeof (regno_mapping) / sizeof (regno_mapping[0]); | |
391 | } | |
392 | ||
393 | for (; regno < end_reg; regno++) | |
394 | { | |
395 | if (regno < 16) | |
396 | supply_register (regno, | |
397 | (char *) &a_tss + regno_mapping[regno].tss_ofs); | |
398 | else if (regno < 24) | |
399 | supply_register (regno, | |
400 | (char *) &npx.reg[regno_mapping[regno].tss_ofs]); | |
401 | else if (regno < 31) | |
402 | supply_register (regno, | |
403 | (char *) &npx.reg + regno_mapping[regno].tss_ofs); | |
404 | else | |
405 | { | |
406 | printf_unfiltered ("Invalid register in go32_fetch_register(%d)", | |
407 | regno); | |
408 | exit (1); | |
409 | } | |
410 | } | |
411 | } | |
412 | ||
413 | static void | |
414 | store_register (int regno) | |
415 | { | |
416 | void *rp; | |
417 | void *v = (void *) ®isters[REGISTER_BYTE (regno)]; | |
418 | ||
419 | if (regno < 16) | |
420 | rp = (char *) &a_tss + regno_mapping[regno].tss_ofs; | |
421 | else if (regno < 24) | |
422 | rp = (char *) &npx.reg[regno_mapping[regno].tss_ofs]; | |
423 | else if (regno > 31) | |
424 | rp = (char *) &npx + regno_mapping[regno].tss_ofs; | |
425 | else | |
426 | { | |
427 | printf_unfiltered ("Invalid register in store_register(%d)", regno); | |
428 | exit (1); | |
429 | } | |
430 | memcpy (rp, v, regno_mapping[regno].size); | |
431 | } | |
432 | ||
433 | static void | |
434 | go32_store_registers (int regno) | |
435 | { | |
436 | int r; | |
437 | ||
438 | if (regno >= 0) | |
439 | store_register (regno); | |
440 | else | |
441 | { | |
442 | for (r = 0; r < sizeof (regno_mapping) / sizeof (regno_mapping[0]); r++) | |
443 | store_register (r); | |
444 | } | |
445 | } | |
446 | ||
447 | static void | |
448 | go32_prepare_to_store (void) | |
449 | { | |
450 | } | |
451 | ||
452 | static int | |
453 | go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, | |
454 | struct target_ops *target) | |
455 | { | |
456 | if (write) | |
457 | { | |
458 | if (write_child (memaddr, myaddr, len)) | |
459 | { | |
460 | return 0; | |
461 | } | |
462 | else | |
463 | { | |
464 | return len; | |
465 | } | |
466 | } | |
467 | else | |
468 | { | |
469 | if (read_child (memaddr, myaddr, len)) | |
470 | { | |
471 | return 0; | |
472 | } | |
473 | else | |
474 | { | |
475 | return len; | |
476 | } | |
477 | } | |
478 | } | |
479 | ||
480 | static void | |
481 | go32_files_info (struct target_ops *target) | |
482 | { | |
483 | printf_unfiltered ("You are running a DJGPP V2 program\n"); | |
484 | } | |
485 | ||
486 | static void | |
487 | go32_stop (void) | |
488 | { | |
489 | normal_stop (); | |
490 | cleanup_client (); | |
491 | inferior_pid = 0; | |
492 | prog_has_started = 0; | |
493 | } | |
494 | ||
495 | static void | |
496 | go32_kill_inferior (void) | |
497 | { | |
e49d4fa6 SS |
498 | unpush_target (&go32_ops); |
499 | } | |
500 | ||
501 | static void | |
502 | go32_create_inferior (char *exec_file, char *args, char **env) | |
503 | { | |
504 | jmp_buf start_state; | |
505 | char *cmdline; | |
506 | char **env_save = environ; | |
507 | ||
508 | if (prog_has_started) | |
509 | { | |
b83266a0 | 510 | go32_stop (); |
e49d4fa6 SS |
511 | go32_kill_inferior (); |
512 | } | |
513 | ||
514 | cmdline = (char *) alloca (strlen (args) + 4); | |
515 | cmdline[0] = strlen (args); | |
516 | strcpy (cmdline + 1, args); | |
517 | cmdline[strlen (args) + 1] = 13; | |
518 | ||
519 | environ = env; | |
520 | ||
521 | if (v2loadimage (exec_file, cmdline, start_state)) | |
522 | { | |
523 | environ = env_save; | |
524 | printf_unfiltered ("Load failed for image %s\n", exec_file); | |
525 | exit (1); | |
526 | } | |
527 | environ = env_save; | |
528 | ||
529 | edi_init (start_state); | |
530 | ||
531 | inferior_pid = SOME_PID; | |
532 | push_target (&go32_ops); | |
533 | clear_proceed_status (); | |
534 | insert_breakpoints (); | |
535 | proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); | |
b83266a0 | 536 | prog_has_started = 1; |
e49d4fa6 SS |
537 | } |
538 | ||
539 | static void | |
540 | go32_mourn_inferior (void) | |
541 | { | |
542 | go32_kill_inferior (); | |
543 | generic_mourn_inferior (); | |
544 | } | |
545 | ||
546 | static int | |
547 | go32_can_run (void) | |
548 | { | |
549 | return 1; | |
550 | } | |
551 | ||
552 | static void | |
553 | ignore (void) | |
554 | { | |
555 | } | |
556 | ||
557 | static void | |
558 | ignore2 (char *a, int b) | |
559 | { | |
560 | } | |
561 | ||
562 | /* Hardware watchpoint support. */ | |
563 | ||
564 | #define DR_STATUS 6 | |
565 | #define DR_CONTROL 7 | |
566 | #define DR_ENABLE_SIZE 2 | |
567 | #define DR_LOCAL_ENABLE_SHIFT 0 | |
568 | #define DR_GLOBAL_ENABLE_SHIFT 1 | |
569 | #define DR_LOCAL_SLOWDOWN 0x100 | |
570 | #define DR_GLOBAL_SLOWDOWN 0x200 | |
571 | #define DR_CONTROL_SHIFT 16 | |
572 | #define DR_CONTROL_SIZE 4 | |
573 | #define DR_RW_READ 0x3 | |
574 | #define DR_RW_WRITE 0x1 | |
575 | #define DR_CONTROL_MASK 0xf | |
576 | #define DR_ENABLE_MASK 0x3 | |
577 | #define DR_LEN_1 0x0 | |
578 | #define DR_LEN_2 0x4 | |
579 | #define DR_LEN_4 0xc | |
580 | ||
581 | #define D_REGS edi.dr | |
582 | #define CONTROL D_REGS[DR_CONTROL] | |
583 | #define STATUS D_REGS[DR_STATUS] | |
584 | ||
585 | #define IS_REG_FREE(index) \ | |
586 | (!(CONTROL & (3 << (DR_ENABLE_SIZE * index)))) | |
587 | ||
588 | #define LOCAL_ENABLE_REG(index) \ | |
589 | (CONTROL |= (1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * index))) | |
590 | ||
591 | #define GLOBAL_ENABLE_REG(index) \ | |
592 | (CONTROL |= (1 << (DR_GLOBAL_ENABLE_SHIFT + DR_ENABLE_SIZE * index))) | |
593 | ||
594 | #define DISABLE_REG(index) \ | |
595 | (CONTROL &= ~(3 << (DR_ENABLE_SIZE * index))) | |
596 | ||
597 | #define SET_LOCAL_EXACT() \ | |
598 | (CONTROL |= DR_LOCAL_SLOWDOWN) | |
599 | ||
600 | #define SET_GLOBAL_EXACT() \ | |
601 | (CONTROL |= DR_GLOBAL_SLOWDOWN) | |
602 | ||
603 | #define SET_BREAK(index,address) \ | |
604 | do {\ | |
605 | CONTROL &= ~(DR_CONTROL_MASK << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * index));\ | |
606 | D_REGS[index] = address;\ | |
607 | } while(0) | |
608 | ||
609 | #define SET_WATCH(index,address,rw,len) \ | |
610 | do {\ | |
611 | SET_BREAK(index,address);\ | |
612 | CONTROL |= (len | rw) << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * index);\ | |
613 | } while (0) | |
614 | ||
615 | #define WATCH_HIT(index) \ | |
616 | (\ | |
617 | (STATUS & (1 << index)) && \ | |
618 | (CONTROL & (DR_CONTROL_MASK << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * index)))\ | |
619 | ) | |
620 | ||
c5aa993b | 621 | #if 0 /* use debugging macro */ |
e49d4fa6 SS |
622 | #define SHOW_DR(text) \ |
623 | do { \ | |
624 | fprintf(stderr,"%08x %08x ",edi.dr[7],edi.dr[6]); \ | |
625 | fprintf(stderr,"%08x %08x ",edi.dr[0],edi.dr[1]); \ | |
626 | fprintf(stderr,"%08x %08x ",edi.dr[2],edi.dr[3]); \ | |
627 | fprintf(stderr,"(%s)\n",#text); \ | |
628 | } while (0) | |
629 | #else | |
630 | #define SHOW_DR(text) do {} while (0) | |
631 | #endif | |
632 | ||
e49d4fa6 SS |
633 | /* Insert a watchpoint. */ |
634 | ||
635 | int | |
636 | go32_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw) | |
637 | { | |
638 | int ret = go32_insert_aligned_watchpoint (pid, addr, addr, len, rw); | |
639 | ||
640 | SHOW_DR (insert_watch); | |
641 | return ret; | |
642 | } | |
643 | ||
644 | static int | |
645 | go32_insert_aligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr, | |
646 | int len, int rw) | |
647 | { | |
648 | int i; | |
649 | int read_write_bits, len_bits; | |
650 | ||
651 | /* Look for a free debug register. */ | |
652 | for (i = 0; i <= 3; i++) | |
653 | { | |
654 | if (IS_REG_FREE (i)) | |
655 | break; | |
656 | } | |
657 | ||
658 | /* No more debug registers! */ | |
659 | if (i > 3) | |
660 | return -1; | |
661 | ||
662 | read_write_bits = ((rw & 1) ? DR_RW_READ : 0) | ((rw & 2) ? DR_RW_WRITE : 0); | |
663 | ||
664 | if (len == 1) | |
665 | len_bits = DR_LEN_1; | |
666 | else if (len == 2) | |
667 | { | |
668 | if (addr % 2) | |
669 | return go32_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); | |
670 | len_bits = DR_LEN_2; | |
671 | } | |
672 | else if (len == 4) | |
673 | { | |
674 | if (addr % 4) | |
675 | return go32_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); | |
676 | len_bits = DR_LEN_4; | |
677 | } | |
678 | else | |
679 | return go32_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); | |
680 | ||
681 | SET_WATCH (i, addr, read_write_bits, len_bits); | |
682 | LOCAL_ENABLE_REG (i); | |
683 | SET_LOCAL_EXACT (); | |
684 | } | |
685 | ||
686 | static int | |
687 | go32_insert_nonaligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr, | |
688 | int len, int rw) | |
689 | { | |
690 | int align; | |
691 | int size; | |
692 | int rv = 0; | |
693 | ||
694 | static int size_try_array[16] = | |
695 | { | |
696 | 1, 1, 1, 1, /* trying size one */ | |
697 | 2, 1, 2, 1, /* trying size two */ | |
698 | 2, 1, 2, 1, /* trying size three */ | |
699 | 4, 1, 2, 1 /* trying size four */ | |
700 | }; | |
701 | ||
702 | while (len > 0) | |
703 | { | |
704 | align = addr % 4; | |
705 | /* Four is the maximum length for 386. */ | |
706 | size = (len > 4) ? 3 : len - 1; | |
707 | size = size_try_array[size * 4 + align]; | |
708 | rv = go32_insert_aligned_watchpoint (pid, waddr, addr, size, rw); | |
709 | if (rv) | |
710 | { | |
711 | go32_remove_watchpoint (pid, waddr, size); | |
712 | return rv; | |
713 | } | |
714 | addr += size; | |
715 | len -= size; | |
716 | } | |
717 | return rv; | |
718 | } | |
719 | ||
720 | /* Remove a watchpoint. */ | |
721 | ||
722 | int | |
723 | go32_remove_watchpoint (int pid, CORE_ADDR addr, int len) | |
724 | { | |
725 | int i; | |
726 | ||
727 | for (i = 0; i <= 3; i++) | |
728 | { | |
729 | if (D_REGS[i] == addr) | |
730 | { | |
731 | DISABLE_REG (i); | |
732 | } | |
733 | } | |
734 | SHOW_DR (remove_watch); | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | /* Check if stopped by a watchpoint. */ | |
740 | ||
741 | CORE_ADDR | |
742 | go32_stopped_by_watchpoint (int pid) | |
743 | { | |
744 | int i, ret = 0; | |
745 | int status; | |
746 | ||
747 | status = edi.dr[DR_STATUS]; | |
748 | SHOW_DR (stopped_by); | |
749 | for (i = 0; i <= 3; i++) | |
750 | { | |
751 | if (WATCH_HIT (i)) | |
752 | { | |
753 | SHOW_DR (HIT); | |
754 | ret = D_REGS[i]; | |
755 | } | |
756 | } | |
757 | /* this is a hack to GDB. If we stopped at a hardware breakpoint, | |
758 | the stop_pc must incremented by DECR_PC_AFTER_BREAK. I tried everything | |
759 | with the DECR_PC_AFTER_HW_BREAK, but nothing works. */ | |
760 | /* This is probably fixed by jtc's recent patch -sts 2/19/99 */ | |
761 | if (STATUS && !ret) | |
762 | stop_pc += DECR_PC_AFTER_BREAK; | |
763 | STATUS = 0; | |
764 | ||
765 | return ret; | |
766 | } | |
767 | ||
768 | /* Remove a breakpoint. */ | |
769 | ||
770 | int | |
771 | go32_remove_hw_breakpoint (CORE_ADDR addr, CORE_ADDR shadow) | |
772 | { | |
773 | int i; | |
774 | for (i = 0; i <= 3; i++) | |
775 | { | |
776 | if (D_REGS[i] == addr) | |
777 | { | |
778 | DISABLE_REG (i); | |
779 | } | |
780 | } | |
781 | SHOW_DR (remove_hw); | |
782 | return 0; | |
783 | } | |
784 | ||
785 | int | |
786 | go32_insert_hw_breakpoint (CORE_ADDR addr, CORE_ADDR shadow) | |
787 | { | |
788 | int i; | |
789 | int read_write_bits, len_bits; | |
790 | int free_debug_register; | |
791 | int register_number; | |
792 | ||
793 | /* Look for a free debug register. */ | |
794 | for (i = 0; i <= 3; i++) | |
795 | { | |
796 | if (IS_REG_FREE (i)) | |
797 | break; | |
798 | } | |
799 | ||
800 | /* No more debug registers! */ | |
801 | if (i > 3) | |
802 | return -1; | |
803 | ||
804 | SET_BREAK (i, addr); | |
805 | LOCAL_ENABLE_REG (i); | |
806 | SHOW_DR (insert_hw); | |
807 | ||
808 | return 0; | |
809 | } | |
810 | ||
cce74817 JM |
811 | static int inf_flags_valid = 0; |
812 | static int inf_in_flag; | |
813 | static int inf_out_flag; | |
814 | ||
815 | static void | |
816 | go32_terminal_init (void) | |
817 | { | |
818 | /* Save the filemodes for stdin/stout */ | |
c5aa993b JM |
819 | inf_in_flag = setmode (0, 0); |
820 | setmode (0, inf_in_flag); | |
821 | inf_out_flag = setmode (1, 0); | |
822 | setmode (1, inf_out_flag); | |
cce74817 JM |
823 | inf_flags_valid = 1; |
824 | } | |
825 | ||
826 | static void | |
827 | go32_terminal_inferior (void) | |
828 | { | |
829 | /* set the filemodes for stdin/stdout of the inferior */ | |
830 | if (inf_flags_valid) | |
c5aa993b JM |
831 | { |
832 | setmode (0, inf_in_flag); | |
833 | setmode (1, inf_out_flag); | |
834 | } | |
cce74817 JM |
835 | } |
836 | ||
837 | static void | |
838 | go32_terminal_ours (void) | |
839 | { | |
840 | /* Switch to text mode on stdin/stdout always on the gdb terminal and | |
841 | save the inferior modes to be restored later */ | |
c5aa993b JM |
842 | inf_in_flag = setmode (0, O_TEXT); |
843 | inf_out_flag = setmode (1, O_TEXT); | |
cce74817 JM |
844 | } |
845 | ||
e49d4fa6 SS |
846 | static void |
847 | init_go32_ops (void) | |
848 | { | |
849 | go32_ops.to_shortname = "djgpp"; | |
850 | go32_ops.to_longname = "djgpp target process"; | |
851 | go32_ops.to_doc = | |
852 | "Program loaded by djgpp, when gdb is used as an external debugger"; | |
853 | go32_ops.to_open = go32_open; | |
854 | go32_ops.to_close = go32_close; | |
855 | go32_ops.to_detach = go32_detach; | |
856 | go32_ops.to_resume = go32_resume; | |
857 | go32_ops.to_wait = go32_wait; | |
858 | go32_ops.to_fetch_registers = go32_fetch_registers; | |
859 | go32_ops.to_store_registers = go32_store_registers; | |
860 | go32_ops.to_prepare_to_store = go32_prepare_to_store; | |
861 | go32_ops.to_xfer_memory = go32_xfer_memory; | |
862 | go32_ops.to_files_info = go32_files_info; | |
863 | go32_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
864 | go32_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
cce74817 JM |
865 | go32_ops.to_terminal_init = go32_terminal_init; |
866 | go32_ops.to_terminal_inferior = go32_terminal_inferior; | |
e49d4fa6 | 867 | go32_ops.to_terminal_ours_for_output = ignore; |
cce74817 | 868 | go32_ops.to_terminal_ours = go32_terminal_ours; |
e49d4fa6 SS |
869 | go32_ops.to_terminal_info = ignore2; |
870 | go32_ops.to_kill = go32_kill_inferior; | |
871 | go32_ops.to_create_inferior = go32_create_inferior; | |
872 | go32_ops.to_mourn_inferior = go32_mourn_inferior; | |
873 | go32_ops.to_can_run = go32_can_run; | |
874 | go32_ops.to_stop = go32_stop; | |
875 | go32_ops.to_stratum = process_stratum; | |
876 | go32_ops.to_has_all_memory = 1; | |
877 | go32_ops.to_has_memory = 1; | |
878 | go32_ops.to_has_stack = 1; | |
879 | go32_ops.to_has_registers = 1; | |
880 | go32_ops.to_has_execution = 1; | |
881 | go32_ops.to_magic = OPS_MAGIC; | |
882 | } | |
883 | ||
884 | void | |
885 | _initialize_go32_nat (void) | |
886 | { | |
887 | init_go32_ops (); | |
888 | add_target (&go32_ops); | |
889 | } |