Commit | Line | Data |
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c906108c | 1 | /* Native support code for HPUX PA-RISC. |
b83266a0 | 2 | Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1998, 1999 |
c906108c SS |
3 | Free Software Foundation, Inc. |
4 | ||
5 | Contributed by the Center for Software Science at the | |
6 | University of Utah (pa-gdb-bugs@cs.utah.edu). | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
24 | |
25 | ||
26 | #include "defs.h" | |
27 | #include "inferior.h" | |
28 | #include "target.h" | |
29 | #include <sys/ptrace.h> | |
30 | #include "gdbcore.h" | |
a526d713 | 31 | #include "gdb_wait.h" |
c906108c SS |
32 | #include <signal.h> |
33 | ||
34 | extern CORE_ADDR text_end; | |
35 | ||
a14ed312 | 36 | static void fetch_register (int); |
c906108c SS |
37 | |
38 | void | |
39 | fetch_inferior_registers (regno) | |
40 | int regno; | |
41 | { | |
42 | if (regno == -1) | |
43 | for (regno = 0; regno < NUM_REGS; regno++) | |
44 | fetch_register (regno); | |
45 | else | |
46 | fetch_register (regno); | |
47 | } | |
48 | ||
7be570e7 JM |
49 | /* Our own version of the offsetof macro, since we can't assume ANSI C. */ |
50 | #define HPPAH_OFFSETOF(type, member) ((int) (&((type *) 0)->member)) | |
51 | ||
c906108c SS |
52 | /* Store our register values back into the inferior. |
53 | If REGNO is -1, do this for all registers. | |
54 | Otherwise, REGNO specifies which register (so we can save time). */ | |
55 | ||
56 | void | |
57 | store_inferior_registers (regno) | |
58 | int regno; | |
59 | { | |
60 | register unsigned int regaddr; | |
61 | char buf[80]; | |
c906108c SS |
62 | register int i; |
63 | unsigned int offset = U_REGS_OFFSET; | |
64 | int scratch; | |
65 | ||
66 | if (regno >= 0) | |
67 | { | |
7be570e7 JM |
68 | unsigned int addr, len, offset; |
69 | ||
c906108c SS |
70 | if (CANNOT_STORE_REGISTER (regno)) |
71 | return; | |
7be570e7 JM |
72 | |
73 | offset = 0; | |
74 | len = REGISTER_RAW_SIZE (regno); | |
75 | ||
76 | /* Requests for register zero actually want the save_state's | |
77 | ss_flags member. As RM says: "Oh, what a hack!" */ | |
78 | if (regno == 0) | |
b83266a0 | 79 | { |
7be570e7 JM |
80 | save_state_t ss; |
81 | addr = HPPAH_OFFSETOF (save_state_t, ss_flags); | |
82 | len = sizeof (ss.ss_flags); | |
83 | ||
84 | /* Note that ss_flags is always an int, no matter what | |
85 | REGISTER_RAW_SIZE(0) says. Assuming all HP-UX PA machines | |
86 | are big-endian, put it at the least significant end of the | |
87 | value, and zap the rest of the buffer. */ | |
88 | offset = REGISTER_RAW_SIZE (0) - len; | |
89 | } | |
90 | ||
91 | /* Floating-point registers come from the ss_fpblock area. */ | |
92 | else if (regno >= FP0_REGNUM) | |
93 | addr = (HPPAH_OFFSETOF (save_state_t, ss_fpblock) | |
94 | + (REGISTER_BYTE (regno) - REGISTER_BYTE (FP0_REGNUM))); | |
95 | ||
96 | /* Wide registers come from the ss_wide area. | |
97 | I think it's more PC to test (ss_flags & SS_WIDEREGS) to select | |
98 | between ss_wide and ss_narrow than to use the raw register size. | |
99 | But checking ss_flags would require an extra ptrace call for | |
100 | every register reference. Bleah. */ | |
101 | else if (len == 8) | |
102 | addr = (HPPAH_OFFSETOF (save_state_t, ss_wide) | |
103 | + REGISTER_BYTE (regno)); | |
104 | ||
105 | /* Narrow registers come from the ss_narrow area. Note that | |
106 | ss_narrow starts with gr1, not gr0. */ | |
107 | else if (len == 4) | |
108 | addr = (HPPAH_OFFSETOF (save_state_t, ss_narrow) | |
109 | + (REGISTER_BYTE (regno) - REGISTER_BYTE (1))); | |
110 | else | |
111 | internal_error ("hppah-nat.c (write_register): unexpected register size"); | |
112 | ||
113 | #ifdef GDB_TARGET_IS_HPPA_20W | |
114 | /* Unbelieveable. The PC head and tail must be written in 64bit hunks | |
115 | or we will get an error. Worse yet, the oddball ptrace/ttrace | |
116 | layering will not allow us to perform a 64bit register store. | |
117 | ||
118 | What a crock. */ | |
119 | if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM && len == 8) | |
120 | { | |
121 | CORE_ADDR temp; | |
122 | ||
123 | temp = *(CORE_ADDR *)®isters[REGISTER_BYTE (regno)]; | |
124 | ||
125 | /* Set the priv level (stored in the low two bits of the PC. */ | |
126 | temp |= 0x3; | |
127 | ||
128 | ttrace_write_reg_64 (inferior_pid, (CORE_ADDR)addr, (CORE_ADDR)&temp); | |
129 | ||
130 | /* If we fail to write the PC, give a true error instead of | |
131 | just a warning. */ | |
b83266a0 SS |
132 | if (errno != 0) |
133 | { | |
7be570e7 JM |
134 | char *err = safe_strerror (errno); |
135 | char *msg = alloca (strlen (err) + 128); | |
136 | sprintf (msg, "writing `%s' register: %s", | |
137 | REGISTER_NAME (regno), err); | |
138 | perror_with_name (msg); | |
b83266a0 | 139 | } |
7be570e7 | 140 | return; |
b83266a0 | 141 | } |
53a5351d JM |
142 | |
143 | /* Another crock. HPUX complains if you write a nonzero value to | |
144 | the high part of IPSW. What will it take for HP to catch a | |
145 | clue about building sensible interfaces? */ | |
146 | if (regno == IPSW_REGNUM && len == 8) | |
147 | *(int *)®isters[REGISTER_BYTE (regno)] = 0; | |
7be570e7 JM |
148 | #endif |
149 | ||
150 | for (i = 0; i < len; i += sizeof (int)) | |
151 | { | |
152 | errno = 0; | |
153 | call_ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) addr + i, | |
154 | *(int *) ®isters[REGISTER_BYTE (regno) + i]); | |
155 | if (errno != 0) | |
156 | { | |
157 | /* Warning, not error, in case we are attached; sometimes | |
158 | the kernel doesn't let us at the registers. */ | |
159 | char *err = safe_strerror (errno); | |
160 | char *msg = alloca (strlen (err) + 128); | |
53a5351d | 161 | sprintf (msg, "writing `%s' register: %s", |
7be570e7 JM |
162 | REGISTER_NAME (regno), err); |
163 | /* If we fail to write the PC, give a true error instead of | |
164 | just a warning. */ | |
165 | if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM) | |
166 | perror_with_name (msg); | |
167 | else | |
c906108c | 168 | warning (msg); |
7be570e7 JM |
169 | return; |
170 | } | |
171 | } | |
c906108c SS |
172 | } |
173 | else | |
174 | for (regno = 0; regno < NUM_REGS; regno++) | |
175 | store_inferior_registers (regno); | |
176 | } | |
177 | ||
c906108c | 178 | |
adf40b2e | 179 | /* Fetch a register's value from the process's U area. */ |
c906108c SS |
180 | static void |
181 | fetch_register (regno) | |
182 | int regno; | |
183 | { | |
c906108c | 184 | char buf[MAX_REGISTER_RAW_SIZE]; |
adf40b2e JM |
185 | unsigned int addr, len, offset; |
186 | int i; | |
c906108c | 187 | |
adf40b2e JM |
188 | offset = 0; |
189 | len = REGISTER_RAW_SIZE (regno); | |
190 | ||
191 | /* Requests for register zero actually want the save_state's | |
192 | ss_flags member. As RM says: "Oh, what a hack!" */ | |
193 | if (regno == 0) | |
194 | { | |
195 | save_state_t ss; | |
196 | addr = HPPAH_OFFSETOF (save_state_t, ss_flags); | |
197 | len = sizeof (ss.ss_flags); | |
198 | ||
199 | /* Note that ss_flags is always an int, no matter what | |
200 | REGISTER_RAW_SIZE(0) says. Assuming all HP-UX PA machines | |
201 | are big-endian, put it at the least significant end of the | |
202 | value, and zap the rest of the buffer. */ | |
203 | offset = REGISTER_RAW_SIZE (0) - len; | |
204 | memset (buf, 0, sizeof (buf)); | |
205 | } | |
c906108c | 206 | |
adf40b2e JM |
207 | /* Floating-point registers come from the ss_fpblock area. */ |
208 | else if (regno >= FP0_REGNUM) | |
209 | addr = (HPPAH_OFFSETOF (save_state_t, ss_fpblock) | |
210 | + (REGISTER_BYTE (regno) - REGISTER_BYTE (FP0_REGNUM))); | |
211 | ||
212 | /* Wide registers come from the ss_wide area. | |
213 | I think it's more PC to test (ss_flags & SS_WIDEREGS) to select | |
214 | between ss_wide and ss_narrow than to use the raw register size. | |
215 | But checking ss_flags would require an extra ptrace call for | |
216 | every register reference. Bleah. */ | |
217 | else if (len == 8) | |
218 | addr = (HPPAH_OFFSETOF (save_state_t, ss_wide) | |
219 | + REGISTER_BYTE (regno)); | |
220 | ||
221 | /* Narrow registers come from the ss_narrow area. Note that | |
222 | ss_narrow starts with gr1, not gr0. */ | |
223 | else if (len == 4) | |
224 | addr = (HPPAH_OFFSETOF (save_state_t, ss_narrow) | |
225 | + (REGISTER_BYTE (regno) - REGISTER_BYTE (1))); | |
c906108c | 226 | |
adf40b2e | 227 | else |
96baa820 | 228 | internal_error ("hppa-nat.c (fetch_register): unexpected register size"); |
adf40b2e JM |
229 | |
230 | for (i = 0; i < len; i += sizeof (int)) | |
c906108c SS |
231 | { |
232 | errno = 0; | |
adf40b2e JM |
233 | /* Copy an int from the U area to buf. Fill the least |
234 | significant end if len != raw_size. */ | |
235 | * (int *) &buf[offset + i] = | |
236 | call_ptrace (PT_RUREGS, inferior_pid, | |
237 | (PTRACE_ARG3_TYPE) addr + i, 0); | |
c906108c SS |
238 | if (errno != 0) |
239 | { | |
adf40b2e JM |
240 | /* Warning, not error, in case we are attached; sometimes |
241 | the kernel doesn't let us at the registers. */ | |
c906108c SS |
242 | char *err = safe_strerror (errno); |
243 | char *msg = alloca (strlen (err) + 128); | |
adf40b2e JM |
244 | sprintf (msg, "reading `%s' register: %s", |
245 | REGISTER_NAME (regno), err); | |
c906108c | 246 | warning (msg); |
adf40b2e | 247 | return; |
c906108c SS |
248 | } |
249 | } | |
adf40b2e JM |
250 | |
251 | /* If we're reading an address from the instruction address queue, | |
252 | mask out the bottom two bits --- they contain the privilege | |
253 | level. */ | |
c906108c | 254 | if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM) |
adf40b2e JM |
255 | buf[len - 1] &= ~0x3; |
256 | ||
c906108c | 257 | supply_register (regno, buf); |
c906108c SS |
258 | } |
259 | ||
adf40b2e | 260 | |
c906108c SS |
261 | /* Copy LEN bytes to or from inferior's memory starting at MEMADDR |
262 | to debugger memory starting at MYADDR. Copy to inferior if | |
263 | WRITE is nonzero. | |
c5aa993b | 264 | |
c906108c SS |
265 | Returns the length copied, which is either the LEN argument or zero. |
266 | This xfer function does not do partial moves, since child_ops | |
267 | doesn't allow memory operations to cross below us in the target stack | |
268 | anyway. */ | |
269 | ||
270 | int | |
271 | child_xfer_memory (memaddr, myaddr, len, write, target) | |
272 | CORE_ADDR memaddr; | |
273 | char *myaddr; | |
274 | int len; | |
275 | int write; | |
c5aa993b | 276 | struct target_ops *target; /* ignored */ |
c906108c SS |
277 | { |
278 | register int i; | |
279 | /* Round starting address down to longword boundary. */ | |
a0b3c4fd | 280 | register CORE_ADDR addr = memaddr & - (CORE_ADDR)(sizeof (int)); |
c906108c SS |
281 | /* Round ending address up; get number of longwords that makes. */ |
282 | register int count | |
c5aa993b | 283 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); |
c906108c | 284 | |
b83266a0 SS |
285 | /* Allocate buffer of that many longwords. |
286 | Note -- do not use alloca to allocate this buffer since there is no | |
287 | guarantee of when the buffer will actually be deallocated. | |
288 | ||
289 | This routine can be called over and over with the same call chain; | |
290 | this (in effect) would pile up all those alloca requests until a call | |
291 | to alloca was made from a point higher than this routine in the | |
292 | call chain. */ | |
c906108c SS |
293 | register int *buffer = (int *) xmalloc (count * sizeof (int)); |
294 | ||
295 | if (write) | |
296 | { | |
297 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
c5aa993b | 298 | if (addr != memaddr || len < (int) sizeof (int)) |
b83266a0 SS |
299 | { |
300 | /* Need part of initial word -- fetch it. */ | |
c5aa993b | 301 | buffer[0] = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, |
b83266a0 SS |
302 | inferior_pid, (PTRACE_ARG3_TYPE) addr, 0); |
303 | } | |
c906108c SS |
304 | |
305 | if (count > 1) /* FIXME, avoid if even boundary */ | |
306 | { | |
307 | buffer[count - 1] | |
b83266a0 SS |
308 | = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, |
309 | inferior_pid, | |
310 | (PTRACE_ARG3_TYPE) (addr | |
311 | + (count - 1) * sizeof (int)), | |
312 | 0); | |
c906108c SS |
313 | } |
314 | ||
315 | /* Copy data to be written over corresponding part of buffer */ | |
c906108c SS |
316 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); |
317 | ||
318 | /* Write the entire buffer. */ | |
c906108c SS |
319 | for (i = 0; i < count; i++, addr += sizeof (int)) |
320 | { | |
b83266a0 SS |
321 | int pt_status; |
322 | int pt_request; | |
323 | /* The HP-UX kernel crashes if you use PT_WDUSER to write into the | |
324 | text segment. FIXME -- does it work to write into the data | |
325 | segment using WIUSER, or do these idiots really expect us to | |
326 | figure out which segment the address is in, so we can use a | |
327 | separate system call for it??! */ | |
c906108c | 328 | errno = 0; |
b83266a0 | 329 | pt_request = (addr < text_end) ? PT_WIUSER : PT_WDUSER; |
c906108c | 330 | pt_status = call_ptrace (pt_request, |
c5aa993b | 331 | inferior_pid, |
b83266a0 SS |
332 | (PTRACE_ARG3_TYPE) addr, |
333 | buffer[i]); | |
334 | ||
335 | /* Did we fail? Might we've guessed wrong about which | |
336 | segment this address resides in? Try the other request, | |
337 | and see if that works... */ | |
338 | if ((pt_status == -1) && errno) | |
339 | { | |
340 | errno = 0; | |
341 | pt_request = (pt_request == PT_WIUSER) ? PT_WDUSER : PT_WIUSER; | |
342 | pt_status = call_ptrace (pt_request, | |
c5aa993b | 343 | inferior_pid, |
b83266a0 SS |
344 | (PTRACE_ARG3_TYPE) addr, |
345 | buffer[i]); | |
346 | ||
347 | /* No, we still fail. Okay, time to punt. */ | |
348 | if ((pt_status == -1) && errno) | |
349 | { | |
c5aa993b | 350 | free (buffer); |
b83266a0 SS |
351 | return 0; |
352 | } | |
353 | } | |
c906108c SS |
354 | } |
355 | } | |
356 | else | |
357 | { | |
358 | /* Read all the longwords */ | |
359 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
360 | { | |
361 | errno = 0; | |
c5aa993b | 362 | buffer[i] = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, |
b83266a0 SS |
363 | inferior_pid, (PTRACE_ARG3_TYPE) addr, 0); |
364 | if (errno) | |
365 | { | |
c5aa993b | 366 | free (buffer); |
b83266a0 SS |
367 | return 0; |
368 | } | |
c906108c SS |
369 | QUIT; |
370 | } | |
371 | ||
372 | /* Copy appropriate bytes out of the buffer. */ | |
373 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
374 | } | |
c5aa993b | 375 | free (buffer); |
c906108c SS |
376 | return len; |
377 | } | |
378 | ||
379 | ||
380 | void | |
381 | child_post_follow_inferior_by_clone () | |
382 | { | |
b83266a0 | 383 | int status; |
c906108c SS |
384 | |
385 | /* This function is used when following both the parent and child | |
386 | of a fork. In this case, the debugger clones itself. The original | |
387 | debugger follows the parent, the clone follows the child. The | |
388 | original detaches from the child, delivering a SIGSTOP to it to | |
389 | keep it from running away until the clone can attach itself. | |
390 | ||
391 | At this point, the clone has attached to the child. Because of | |
392 | the SIGSTOP, we must now deliver a SIGCONT to the child, or it | |
393 | won't behave properly. */ | |
394 | status = kill (inferior_pid, SIGCONT); | |
395 | } | |
396 | ||
397 | ||
398 | void | |
399 | child_post_follow_vfork (parent_pid, followed_parent, child_pid, followed_child) | |
b83266a0 SS |
400 | int parent_pid; |
401 | int followed_parent; | |
402 | int child_pid; | |
403 | int followed_child; | |
c906108c | 404 | { |
c906108c SS |
405 | /* Are we a debugger that followed the parent of a vfork? If so, |
406 | then recall that the child's vfork event was delivered to us | |
407 | first. And, that the parent was suspended by the OS until the | |
408 | child's exec or exit events were received. | |
409 | ||
410 | Upon receiving that child vfork, then, we were forced to remove | |
411 | all breakpoints in the child and continue it so that it could | |
412 | reach the exec or exit point. | |
413 | ||
414 | But also recall that the parent and child of a vfork share the | |
415 | same address space. Thus, removing bp's in the child also | |
416 | removed them from the parent. | |
417 | ||
418 | Now that the child has safely exec'd or exited, we must restore | |
419 | the parent's breakpoints before we continue it. Else, we may | |
420 | cause it run past expected stopping points. */ | |
421 | if (followed_parent) | |
422 | { | |
423 | reattach_breakpoints (parent_pid); | |
424 | } | |
425 | ||
426 | /* Are we a debugger that followed the child of a vfork? If so, | |
427 | then recall that we don't actually acquire control of the child | |
b83266a0 | 428 | until after it has exec'd or exited. */ |
c906108c SS |
429 | if (followed_child) |
430 | { | |
431 | /* If the child has exited, then there's nothing for us to do. | |
c5aa993b JM |
432 | In the case of an exec event, we'll let that be handled by |
433 | the normal mechanism that notices and handles exec events, in | |
434 | resume(). */ | |
c906108c SS |
435 | } |
436 | } | |
437 | ||
b83266a0 SS |
438 | /* Format a process id, given PID. Be sure to terminate |
439 | this with a null--it's going to be printed via a "%s". */ | |
c906108c | 440 | char * |
ed9a39eb | 441 | child_pid_to_str (pid) |
c5aa993b | 442 | pid_t pid; |
c906108c | 443 | { |
c5aa993b JM |
444 | /* Static because address returned */ |
445 | static char buf[30]; | |
c906108c | 446 | |
c5aa993b JM |
447 | /* Extra NULLs for paranoia's sake */ |
448 | sprintf (buf, "process %d\0\0\0\0", pid); | |
449 | ||
450 | return buf; | |
c906108c SS |
451 | } |
452 | ||
b83266a0 SS |
453 | /* Format a thread id, given TID. Be sure to terminate |
454 | this with a null--it's going to be printed via a "%s". | |
455 | ||
456 | Note: This is a core-gdb tid, not the actual system tid. | |
c5aa993b | 457 | See infttrace.c for details. */ |
c906108c | 458 | char * |
b83266a0 | 459 | hppa_tid_to_str (tid) |
c5aa993b | 460 | pid_t tid; |
c906108c | 461 | { |
c5aa993b JM |
462 | /* Static because address returned */ |
463 | static char buf[30]; | |
464 | ||
465 | /* Extra NULLs for paranoia's sake */ | |
466 | sprintf (buf, "system thread %d\0\0\0\0", tid); | |
c906108c | 467 | |
c5aa993b | 468 | return buf; |
c906108c SS |
469 | } |
470 | ||
471 | #if !defined (GDB_NATIVE_HPUX_11) | |
472 | ||
473 | /* The following code is a substitute for the infttrace.c versions used | |
474 | with ttrace() in HPUX 11. */ | |
475 | ||
476 | /* This value is an arbitrary integer. */ | |
477 | #define PT_VERSION 123456 | |
478 | ||
479 | /* This semaphore is used to coordinate the child and parent processes | |
480 | after a fork(), and before an exec() by the child. See | |
481 | parent_attach_all for details. */ | |
482 | ||
c5aa993b JM |
483 | typedef struct |
484 | { | |
485 | int parent_channel[2]; /* Parent "talks" to [1], child "listens" to [0] */ | |
486 | int child_channel[2]; /* Child "talks" to [1], parent "listens" to [0] */ | |
487 | } | |
488 | startup_semaphore_t; | |
c906108c SS |
489 | |
490 | #define SEM_TALK (1) | |
491 | #define SEM_LISTEN (0) | |
492 | ||
c5aa993b | 493 | static startup_semaphore_t startup_semaphore; |
c906108c | 494 | |
a14ed312 | 495 | extern int parent_attach_all (int, PTRACE_ARG3_TYPE, int); |
c906108c SS |
496 | |
497 | #ifdef PT_SETTRC | |
498 | /* This function causes the caller's process to be traced by its | |
499 | parent. This is intended to be called after GDB forks itself, | |
500 | and before the child execs the target. | |
501 | ||
502 | Note that HP-UX ptrace is rather funky in how this is done. | |
503 | If the parent wants to get the initial exec event of a child, | |
504 | it must set the ptrace event mask of the child to include execs. | |
505 | (The child cannot do this itself.) This must be done after the | |
506 | child is forked, but before it execs. | |
507 | ||
508 | To coordinate the parent and child, we implement a semaphore using | |
509 | pipes. After SETTRC'ing itself, the child tells the parent that | |
510 | it is now traceable by the parent, and waits for the parent's | |
511 | acknowledgement. The parent can then set the child's event mask, | |
512 | and notify the child that it can now exec. | |
513 | ||
514 | (The acknowledgement by parent happens as a result of a call to | |
515 | child_acknowledge_created_inferior.) */ | |
516 | ||
517 | int | |
518 | parent_attach_all (pid, addr, data) | |
519 | int pid; | |
520 | PTRACE_ARG3_TYPE addr; | |
521 | int data; | |
522 | { | |
523 | int pt_status = 0; | |
524 | ||
525 | /* We need a memory home for a constant. */ | |
526 | int tc_magic_child = PT_VERSION; | |
527 | int tc_magic_parent = 0; | |
528 | ||
529 | /* The remainder of this function is only useful for HPUX 10.0 and | |
530 | later, as it depends upon the ability to request notification | |
531 | of specific kinds of events by the kernel. */ | |
532 | #if defined(PT_SET_EVENT_MASK) | |
533 | ||
534 | /* Notify the parent that we're potentially ready to exec(). */ | |
535 | write (startup_semaphore.child_channel[SEM_TALK], | |
b83266a0 SS |
536 | &tc_magic_child, |
537 | sizeof (tc_magic_child)); | |
c906108c SS |
538 | |
539 | /* Wait for acknowledgement from the parent. */ | |
540 | read (startup_semaphore.parent_channel[SEM_LISTEN], | |
b83266a0 SS |
541 | &tc_magic_parent, |
542 | sizeof (tc_magic_parent)); | |
c906108c | 543 | if (tc_magic_child != tc_magic_parent) |
c5aa993b | 544 | warning ("mismatched semaphore magic"); |
c906108c SS |
545 | |
546 | /* Discard our copy of the semaphore. */ | |
547 | (void) close (startup_semaphore.parent_channel[SEM_LISTEN]); | |
548 | (void) close (startup_semaphore.parent_channel[SEM_TALK]); | |
549 | (void) close (startup_semaphore.child_channel[SEM_LISTEN]); | |
550 | (void) close (startup_semaphore.child_channel[SEM_TALK]); | |
551 | #endif | |
c5aa993b | 552 | |
c906108c SS |
553 | return 0; |
554 | } | |
555 | #endif | |
556 | ||
557 | int | |
558 | hppa_require_attach (pid) | |
559 | int pid; | |
560 | { | |
561 | int pt_status; | |
b83266a0 SS |
562 | CORE_ADDR pc; |
563 | CORE_ADDR pc_addr; | |
c906108c SS |
564 | unsigned int regs_offset; |
565 | ||
566 | /* Are we already attached? There appears to be no explicit way to | |
567 | answer this via ptrace, so we try something which should be | |
568 | innocuous if we are attached. If that fails, then we assume | |
569 | we're not attached, and so attempt to make it so. */ | |
570 | ||
571 | errno = 0; | |
572 | regs_offset = U_REGS_OFFSET; | |
573 | pc_addr = register_addr (PC_REGNUM, regs_offset); | |
574 | pc = call_ptrace (PT_READ_U, pid, (PTRACE_ARG3_TYPE) pc_addr, 0); | |
575 | ||
576 | if (errno) | |
577 | { | |
578 | errno = 0; | |
579 | pt_status = call_ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0); | |
580 | ||
581 | if (errno) | |
b83266a0 | 582 | return -1; |
c906108c SS |
583 | |
584 | /* Now we really are attached. */ | |
585 | errno = 0; | |
586 | } | |
587 | attach_flag = 1; | |
588 | return pid; | |
589 | } | |
590 | ||
591 | int | |
592 | hppa_require_detach (pid, signal) | |
c5aa993b JM |
593 | int pid; |
594 | int signal; | |
c906108c SS |
595 | { |
596 | errno = 0; | |
597 | call_ptrace (PT_DETACH, pid, (PTRACE_ARG3_TYPE) 1, signal); | |
c5aa993b | 598 | errno = 0; /* Ignore any errors. */ |
c906108c SS |
599 | return pid; |
600 | } | |
601 | ||
602 | /* Since ptrace doesn't support memory page-protection events, which | |
603 | are used to implement "hardware" watchpoints on HP-UX, these are | |
604 | dummy versions, which perform no useful work. */ | |
605 | ||
606 | void | |
607 | hppa_enable_page_protection_events (pid) | |
608 | int pid; | |
609 | { | |
610 | } | |
611 | ||
612 | void | |
613 | hppa_disable_page_protection_events (pid) | |
614 | int pid; | |
615 | { | |
616 | } | |
617 | ||
618 | int | |
619 | hppa_insert_hw_watchpoint (pid, start, len, type) | |
620 | int pid; | |
621 | CORE_ADDR start; | |
622 | LONGEST len; | |
623 | int type; | |
624 | { | |
625 | error ("Hardware watchpoints not implemented on this platform."); | |
626 | } | |
627 | ||
628 | int | |
629 | hppa_remove_hw_watchpoint (pid, start, len, type) | |
630 | int pid; | |
631 | CORE_ADDR start; | |
632 | LONGEST len; | |
633 | enum bptype type; | |
634 | { | |
635 | error ("Hardware watchpoints not implemented on this platform."); | |
636 | } | |
637 | ||
638 | int | |
639 | hppa_can_use_hw_watchpoint (type, cnt, ot) | |
640 | enum bptype type; | |
641 | int cnt; | |
642 | enum bptype ot; | |
643 | { | |
644 | return 0; | |
645 | } | |
646 | ||
647 | int | |
648 | hppa_range_profitable_for_hw_watchpoint (pid, start, len) | |
649 | int pid; | |
650 | CORE_ADDR start; | |
651 | LONGEST len; | |
652 | { | |
653 | error ("Hardware watchpoints not implemented on this platform."); | |
654 | } | |
655 | ||
656 | char * | |
657 | hppa_pid_or_tid_to_str (id) | |
658 | pid_t id; | |
659 | { | |
660 | /* In the ptrace world, there are only processes. */ | |
ed9a39eb | 661 | return child_pid_to_str (id); |
c906108c SS |
662 | } |
663 | ||
664 | /* This function has no meaning in a non-threaded world. Thus, we | |
665 | return 0 (FALSE). See the use of "hppa_prepare_to_proceed" in | |
666 | hppa-tdep.c. */ | |
667 | ||
668 | pid_t | |
669 | hppa_switched_threads (pid) | |
670 | pid_t pid; | |
671 | { | |
672 | return (pid_t) 0; | |
673 | } | |
674 | ||
675 | void | |
676 | hppa_ensure_vforking_parent_remains_stopped (pid) | |
677 | int pid; | |
678 | { | |
679 | /* This assumes that the vforked parent is presently stopped, and | |
680 | that the vforked child has just delivered its first exec event. | |
681 | Calling kill() this way will cause the SIGTRAP to be delivered as | |
682 | soon as the parent is resumed, which happens as soon as the | |
683 | vforked child is resumed. See wait_for_inferior for the use of | |
684 | this function. */ | |
685 | kill (pid, SIGTRAP); | |
686 | } | |
687 | ||
688 | int | |
689 | hppa_resume_execd_vforking_child_to_get_parent_vfork () | |
690 | { | |
c5aa993b | 691 | return 1; /* Yes, the child must be resumed. */ |
c906108c SS |
692 | } |
693 | ||
694 | void | |
695 | require_notification_of_events (pid) | |
b83266a0 | 696 | int pid; |
c906108c SS |
697 | { |
698 | #if defined(PT_SET_EVENT_MASK) | |
699 | int pt_status; | |
700 | ptrace_event_t ptrace_events; | |
c2d11a7d JM |
701 | int nsigs; |
702 | int signum; | |
c906108c SS |
703 | |
704 | /* Instruct the kernel as to the set of events we wish to be | |
705 | informed of. (This support does not exist before HPUX 10.0. | |
706 | We'll assume if PT_SET_EVENT_MASK has not been defined by | |
b83266a0 | 707 | <sys/ptrace.h>, then we're being built on pre-10.0.) */ |
c906108c SS |
708 | memset (&ptrace_events, 0, sizeof (ptrace_events)); |
709 | ||
710 | /* Note: By default, all signals are visible to us. If we wish | |
711 | the kernel to keep certain signals hidden from us, we do it | |
712 | by calling sigdelset (ptrace_events.pe_signals, signal) for | |
b83266a0 | 713 | each such signal here, before doing PT_SET_EVENT_MASK. */ |
c2d11a7d JM |
714 | /* RM: The above comment is no longer true. We start with ignoring |
715 | all signals, and then add the ones we are interested in. We could | |
716 | do it the other way: start by looking at all signals and then | |
717 | deleting the ones that we aren't interested in, except that | |
718 | multiple gdb signals may be mapped to the same host signal | |
719 | (eg. TARGET_SIGNAL_IO and TARGET_SIGNAL_POLL both get mapped to | |
720 | signal 22 on HPUX 10.20) We want to be notified if we are | |
721 | interested in either signal. */ | |
722 | sigfillset (&ptrace_events.pe_signals); | |
723 | ||
724 | /* RM: Let's not bother with signals we don't care about */ | |
725 | nsigs = (int) TARGET_SIGNAL_LAST; | |
726 | for (signum = nsigs; signum > 0; signum--) | |
727 | { | |
728 | if ((signal_stop_state (signum)) || | |
729 | (signal_print_state (signum)) || | |
730 | (!signal_pass_state (signum))) | |
731 | { | |
732 | if (target_signal_to_host_p (signum)) | |
733 | sigdelset (&ptrace_events.pe_signals, | |
734 | target_signal_to_host (signum)); | |
735 | } | |
736 | } | |
c906108c SS |
737 | |
738 | ptrace_events.pe_set_event = 0; | |
739 | ||
740 | ptrace_events.pe_set_event |= PTRACE_SIGNAL; | |
741 | ptrace_events.pe_set_event |= PTRACE_EXEC; | |
742 | ptrace_events.pe_set_event |= PTRACE_FORK; | |
743 | ptrace_events.pe_set_event |= PTRACE_VFORK; | |
744 | /* ??rehrauer: Add this one when we're prepared to catch it... | |
c5aa993b JM |
745 | ptrace_events.pe_set_event |= PTRACE_EXIT; |
746 | */ | |
c906108c SS |
747 | |
748 | errno = 0; | |
749 | pt_status = call_ptrace (PT_SET_EVENT_MASK, | |
c5aa993b JM |
750 | pid, |
751 | (PTRACE_ARG3_TYPE) & ptrace_events, | |
752 | sizeof (ptrace_events)); | |
c906108c SS |
753 | if (errno) |
754 | perror_with_name ("ptrace"); | |
755 | if (pt_status < 0) | |
756 | return; | |
757 | #endif | |
758 | } | |
759 | ||
760 | void | |
761 | require_notification_of_exec_events (pid) | |
b83266a0 | 762 | int pid; |
c906108c SS |
763 | { |
764 | #if defined(PT_SET_EVENT_MASK) | |
765 | int pt_status; | |
766 | ptrace_event_t ptrace_events; | |
767 | ||
768 | /* Instruct the kernel as to the set of events we wish to be | |
769 | informed of. (This support does not exist before HPUX 10.0. | |
770 | We'll assume if PT_SET_EVENT_MASK has not been defined by | |
b83266a0 | 771 | <sys/ptrace.h>, then we're being built on pre-10.0.) */ |
c906108c SS |
772 | memset (&ptrace_events, 0, sizeof (ptrace_events)); |
773 | ||
774 | /* Note: By default, all signals are visible to us. If we wish | |
775 | the kernel to keep certain signals hidden from us, we do it | |
776 | by calling sigdelset (ptrace_events.pe_signals, signal) for | |
b83266a0 | 777 | each such signal here, before doing PT_SET_EVENT_MASK. */ |
c906108c SS |
778 | sigemptyset (&ptrace_events.pe_signals); |
779 | ||
780 | ptrace_events.pe_set_event = 0; | |
781 | ||
782 | ptrace_events.pe_set_event |= PTRACE_EXEC; | |
783 | /* ??rehrauer: Add this one when we're prepared to catch it... | |
c5aa993b JM |
784 | ptrace_events.pe_set_event |= PTRACE_EXIT; |
785 | */ | |
c906108c SS |
786 | |
787 | errno = 0; | |
788 | pt_status = call_ptrace (PT_SET_EVENT_MASK, | |
c5aa993b JM |
789 | pid, |
790 | (PTRACE_ARG3_TYPE) & ptrace_events, | |
791 | sizeof (ptrace_events)); | |
c906108c SS |
792 | if (errno) |
793 | perror_with_name ("ptrace"); | |
794 | if (pt_status < 0) | |
795 | return; | |
796 | #endif | |
797 | } | |
798 | ||
799 | /* This function is called by the parent process, with pid being the | |
800 | ID of the child process, after the debugger has forked. */ | |
801 | ||
802 | void | |
803 | child_acknowledge_created_inferior (pid) | |
b83266a0 | 804 | int pid; |
c906108c SS |
805 | { |
806 | /* We need a memory home for a constant. */ | |
807 | int tc_magic_parent = PT_VERSION; | |
808 | int tc_magic_child = 0; | |
809 | ||
b83266a0 SS |
810 | /* The remainder of this function is only useful for HPUX 10.0 and |
811 | later, as it depends upon the ability to request notification | |
812 | of specific kinds of events by the kernel. */ | |
813 | #if defined(PT_SET_EVENT_MASK) | |
c906108c SS |
814 | /* Wait for the child to tell us that it has forked. */ |
815 | read (startup_semaphore.child_channel[SEM_LISTEN], | |
b83266a0 | 816 | &tc_magic_child, |
c5aa993b | 817 | sizeof (tc_magic_child)); |
c906108c SS |
818 | |
819 | /* Notify the child that it can exec. | |
820 | ||
821 | In the infttrace.c variant of this function, we set the child's | |
822 | event mask after the fork but before the exec. In the ptrace | |
823 | world, it seems we can't set the event mask until after the exec. */ | |
c906108c | 824 | write (startup_semaphore.parent_channel[SEM_TALK], |
b83266a0 SS |
825 | &tc_magic_parent, |
826 | sizeof (tc_magic_parent)); | |
c906108c SS |
827 | |
828 | /* We'd better pause a bit before trying to set the event mask, | |
829 | though, to ensure that the exec has happened. We don't want to | |
830 | wait() on the child, because that'll screw up the upper layers | |
831 | of gdb's execution control that expect to see the exec event. | |
832 | ||
833 | After an exec, the child is no longer executing gdb code. Hence, | |
834 | we can't have yet another synchronization via the pipes. We'll | |
835 | just sleep for a second, and hope that's enough delay... */ | |
c906108c SS |
836 | sleep (1); |
837 | ||
838 | /* Instruct the kernel as to the set of events we wish to be | |
839 | informed of. */ | |
c906108c SS |
840 | require_notification_of_exec_events (pid); |
841 | ||
842 | /* Discard our copy of the semaphore. */ | |
843 | (void) close (startup_semaphore.parent_channel[SEM_LISTEN]); | |
844 | (void) close (startup_semaphore.parent_channel[SEM_TALK]); | |
845 | (void) close (startup_semaphore.child_channel[SEM_LISTEN]); | |
846 | (void) close (startup_semaphore.child_channel[SEM_TALK]); | |
b83266a0 | 847 | #endif |
c906108c SS |
848 | } |
849 | ||
850 | void | |
851 | child_post_startup_inferior (pid) | |
b83266a0 | 852 | int pid; |
c906108c SS |
853 | { |
854 | require_notification_of_events (pid); | |
855 | } | |
856 | ||
857 | void | |
858 | child_post_attach (pid) | |
b83266a0 | 859 | int pid; |
c906108c SS |
860 | { |
861 | require_notification_of_events (pid); | |
862 | } | |
863 | ||
864 | int | |
865 | child_insert_fork_catchpoint (pid) | |
b83266a0 | 866 | int pid; |
c906108c SS |
867 | { |
868 | /* This request is only available on HPUX 10.0 and later. */ | |
869 | #if !defined(PT_SET_EVENT_MASK) | |
870 | error ("Unable to catch forks prior to HPUX 10.0"); | |
871 | #else | |
872 | /* Enable reporting of fork events from the kernel. */ | |
873 | /* ??rehrauer: For the moment, we're always enabling these events, | |
b83266a0 | 874 | and just ignoring them if there's no catchpoint to catch them. */ |
c906108c SS |
875 | return 0; |
876 | #endif | |
877 | } | |
878 | ||
879 | int | |
880 | child_remove_fork_catchpoint (pid) | |
b83266a0 | 881 | int pid; |
c906108c SS |
882 | { |
883 | /* This request is only available on HPUX 10.0 and later. */ | |
884 | #if !defined(PT_SET_EVENT_MASK) | |
885 | error ("Unable to catch forks prior to HPUX 10.0"); | |
886 | #else | |
887 | /* Disable reporting of fork events from the kernel. */ | |
888 | /* ??rehrauer: For the moment, we're always enabling these events, | |
889 | and just ignoring them if there's no catchpoint to catch them. */ | |
890 | return 0; | |
891 | #endif | |
892 | } | |
893 | ||
894 | int | |
895 | child_insert_vfork_catchpoint (pid) | |
b83266a0 | 896 | int pid; |
c906108c SS |
897 | { |
898 | /* This request is only available on HPUX 10.0 and later. */ | |
899 | #if !defined(PT_SET_EVENT_MASK) | |
900 | error ("Unable to catch vforks prior to HPUX 10.0"); | |
901 | #else | |
902 | /* Enable reporting of vfork events from the kernel. */ | |
903 | /* ??rehrauer: For the moment, we're always enabling these events, | |
904 | and just ignoring them if there's no catchpoint to catch them. */ | |
905 | return 0; | |
906 | #endif | |
907 | } | |
908 | ||
909 | int | |
910 | child_remove_vfork_catchpoint (pid) | |
b83266a0 | 911 | int pid; |
c906108c SS |
912 | { |
913 | /* This request is only available on HPUX 10.0 and later. */ | |
914 | #if !defined(PT_SET_EVENT_MASK) | |
915 | error ("Unable to catch vforks prior to HPUX 10.0"); | |
916 | #else | |
917 | /* Disable reporting of vfork events from the kernel. */ | |
918 | /* ??rehrauer: For the moment, we're always enabling these events, | |
919 | and just ignoring them if there's no catchpoint to catch them. */ | |
920 | return 0; | |
921 | #endif | |
922 | } | |
923 | ||
924 | int | |
925 | child_has_forked (pid, childpid) | |
b83266a0 SS |
926 | int pid; |
927 | int *childpid; | |
c906108c SS |
928 | { |
929 | /* This request is only available on HPUX 10.0 and later. */ | |
930 | #if !defined(PT_GET_PROCESS_STATE) | |
931 | *childpid = 0; | |
932 | return 0; | |
933 | #else | |
934 | int pt_status; | |
c5aa993b | 935 | ptrace_state_t ptrace_state; |
c906108c SS |
936 | |
937 | errno = 0; | |
938 | pt_status = call_ptrace (PT_GET_PROCESS_STATE, | |
b83266a0 | 939 | pid, |
c5aa993b | 940 | (PTRACE_ARG3_TYPE) & ptrace_state, |
b83266a0 | 941 | sizeof (ptrace_state)); |
c906108c SS |
942 | if (errno) |
943 | perror_with_name ("ptrace"); | |
944 | if (pt_status < 0) | |
945 | return 0; | |
946 | ||
947 | if (ptrace_state.pe_report_event & PTRACE_FORK) | |
948 | { | |
949 | *childpid = ptrace_state.pe_other_pid; | |
950 | return 1; | |
951 | } | |
952 | ||
953 | return 0; | |
954 | #endif | |
955 | } | |
956 | ||
957 | int | |
958 | child_has_vforked (pid, childpid) | |
b83266a0 SS |
959 | int pid; |
960 | int *childpid; | |
c906108c SS |
961 | { |
962 | /* This request is only available on HPUX 10.0 and later. */ | |
963 | #if !defined(PT_GET_PROCESS_STATE) | |
964 | *childpid = 0; | |
965 | return 0; | |
966 | ||
967 | #else | |
968 | int pt_status; | |
c5aa993b | 969 | ptrace_state_t ptrace_state; |
c906108c SS |
970 | |
971 | errno = 0; | |
972 | pt_status = call_ptrace (PT_GET_PROCESS_STATE, | |
b83266a0 | 973 | pid, |
c5aa993b | 974 | (PTRACE_ARG3_TYPE) & ptrace_state, |
b83266a0 | 975 | sizeof (ptrace_state)); |
c906108c SS |
976 | if (errno) |
977 | perror_with_name ("ptrace"); | |
978 | if (pt_status < 0) | |
979 | return 0; | |
980 | ||
981 | if (ptrace_state.pe_report_event & PTRACE_VFORK) | |
982 | { | |
983 | *childpid = ptrace_state.pe_other_pid; | |
984 | return 1; | |
985 | } | |
986 | ||
987 | return 0; | |
988 | #endif | |
989 | } | |
990 | ||
991 | int | |
992 | child_can_follow_vfork_prior_to_exec () | |
993 | { | |
994 | /* ptrace doesn't allow this. */ | |
995 | return 0; | |
996 | } | |
997 | ||
998 | int | |
999 | child_insert_exec_catchpoint (pid) | |
b83266a0 | 1000 | int pid; |
c906108c | 1001 | { |
b83266a0 | 1002 | /* This request is only available on HPUX 10.0 and later. */ |
c906108c SS |
1003 | #if !defined(PT_SET_EVENT_MASK) |
1004 | error ("Unable to catch execs prior to HPUX 10.0"); | |
1005 | ||
1006 | #else | |
b83266a0 | 1007 | /* Enable reporting of exec events from the kernel. */ |
c906108c | 1008 | /* ??rehrauer: For the moment, we're always enabling these events, |
b83266a0 | 1009 | and just ignoring them if there's no catchpoint to catch them. */ |
c906108c SS |
1010 | return 0; |
1011 | #endif | |
1012 | } | |
1013 | ||
1014 | int | |
1015 | child_remove_exec_catchpoint (pid) | |
b83266a0 | 1016 | int pid; |
c906108c | 1017 | { |
b83266a0 | 1018 | /* This request is only available on HPUX 10.0 and later. */ |
c906108c SS |
1019 | #if !defined(PT_SET_EVENT_MASK) |
1020 | error ("Unable to catch execs prior to HPUX 10.0"); | |
1021 | ||
1022 | #else | |
1023 | /* Disable reporting of exec events from the kernel. */ | |
1024 | /* ??rehrauer: For the moment, we're always enabling these events, | |
b83266a0 | 1025 | and just ignoring them if there's no catchpoint to catch them. */ |
c906108c SS |
1026 | return 0; |
1027 | #endif | |
1028 | } | |
1029 | ||
1030 | int | |
1031 | child_has_execd (pid, execd_pathname) | |
b83266a0 SS |
1032 | int pid; |
1033 | char **execd_pathname; | |
c906108c | 1034 | { |
b83266a0 | 1035 | /* This request is only available on HPUX 10.0 and later. */ |
c906108c SS |
1036 | #if !defined(PT_GET_PROCESS_STATE) |
1037 | *execd_pathname = NULL; | |
1038 | return 0; | |
1039 | ||
1040 | #else | |
1041 | int pt_status; | |
c5aa993b | 1042 | ptrace_state_t ptrace_state; |
c906108c SS |
1043 | |
1044 | errno = 0; | |
1045 | pt_status = call_ptrace (PT_GET_PROCESS_STATE, | |
b83266a0 | 1046 | pid, |
c5aa993b | 1047 | (PTRACE_ARG3_TYPE) & ptrace_state, |
b83266a0 | 1048 | sizeof (ptrace_state)); |
c906108c SS |
1049 | if (errno) |
1050 | perror_with_name ("ptrace"); | |
1051 | if (pt_status < 0) | |
1052 | return 0; | |
1053 | ||
1054 | if (ptrace_state.pe_report_event & PTRACE_EXEC) | |
1055 | { | |
c5aa993b | 1056 | char *exec_file = target_pid_to_exec_file (pid); |
c906108c SS |
1057 | *execd_pathname = savestring (exec_file, strlen (exec_file)); |
1058 | return 1; | |
1059 | } | |
1060 | ||
1061 | return 0; | |
1062 | #endif | |
1063 | } | |
1064 | ||
1065 | int | |
1066 | child_reported_exec_events_per_exec_call () | |
1067 | { | |
c5aa993b | 1068 | return 2; /* ptrace reports the event twice per call. */ |
c906108c SS |
1069 | } |
1070 | ||
1071 | int | |
1072 | child_has_syscall_event (pid, kind, syscall_id) | |
1073 | int pid; | |
1074 | enum target_waitkind *kind; | |
1075 | int *syscall_id; | |
1076 | { | |
1077 | /* This request is only available on HPUX 10.30 and later, via | |
1078 | the ttrace interface. */ | |
1079 | ||
1080 | *kind = TARGET_WAITKIND_SPURIOUS; | |
1081 | *syscall_id = -1; | |
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | char * | |
1086 | child_pid_to_exec_file (pid) | |
b83266a0 | 1087 | int pid; |
c906108c | 1088 | { |
b83266a0 | 1089 | static char exec_file_buffer[1024]; |
c906108c | 1090 | int pt_status; |
b83266a0 SS |
1091 | CORE_ADDR top_of_stack; |
1092 | char four_chars[4]; | |
c906108c SS |
1093 | int name_index; |
1094 | int i; | |
1095 | int saved_inferior_pid; | |
b83266a0 | 1096 | boolean done; |
c5aa993b | 1097 | |
c906108c SS |
1098 | #ifdef PT_GET_PROCESS_PATHNAME |
1099 | /* As of 10.x HP-UX, there's an explicit request to get the pathname. */ | |
1100 | pt_status = call_ptrace (PT_GET_PROCESS_PATHNAME, | |
b83266a0 SS |
1101 | pid, |
1102 | (PTRACE_ARG3_TYPE) exec_file_buffer, | |
1103 | sizeof (exec_file_buffer) - 1); | |
c906108c SS |
1104 | if (pt_status == 0) |
1105 | return exec_file_buffer; | |
1106 | #endif | |
1107 | ||
1108 | /* It appears that this request is broken prior to 10.30. | |
1109 | If it fails, try a really, truly amazingly gross hack | |
1110 | that DDE uses, of pawing through the process' data | |
1111 | segment to find the pathname. */ | |
1112 | ||
1113 | top_of_stack = 0x7b03a000; | |
1114 | name_index = 0; | |
1115 | done = 0; | |
1116 | ||
1117 | /* On the chance that pid != inferior_pid, set inferior_pid | |
1118 | to pid, so that (grrrr!) implicit uses of inferior_pid get | |
1119 | the right id. */ | |
1120 | ||
1121 | saved_inferior_pid = inferior_pid; | |
1122 | inferior_pid = pid; | |
1123 | ||
1124 | /* Try to grab a null-terminated string. */ | |
c5aa993b | 1125 | while (!done) |
c906108c SS |
1126 | { |
1127 | if (target_read_memory (top_of_stack, four_chars, 4) != 0) | |
1128 | { | |
1129 | inferior_pid = saved_inferior_pid; | |
1130 | return NULL; | |
1131 | } | |
1132 | for (i = 0; i < 4; i++) | |
1133 | { | |
1134 | exec_file_buffer[name_index++] = four_chars[i]; | |
1135 | done = (four_chars[i] == '\0'); | |
1136 | if (done) | |
1137 | break; | |
1138 | } | |
1139 | top_of_stack += 4; | |
1140 | } | |
1141 | ||
1142 | if (exec_file_buffer[0] == '\0') | |
1143 | { | |
1144 | inferior_pid = saved_inferior_pid; | |
1145 | return NULL; | |
1146 | } | |
1147 | ||
1148 | inferior_pid = saved_inferior_pid; | |
1149 | return exec_file_buffer; | |
1150 | } | |
1151 | ||
1152 | void | |
1153 | pre_fork_inferior () | |
1154 | { | |
1155 | int status; | |
1156 | ||
1157 | status = pipe (startup_semaphore.parent_channel); | |
1158 | if (status < 0) | |
1159 | { | |
1160 | warning ("error getting parent pipe for startup semaphore"); | |
1161 | return; | |
1162 | } | |
1163 | ||
1164 | status = pipe (startup_semaphore.child_channel); | |
1165 | if (status < 0) | |
1166 | { | |
1167 | warning ("error getting child pipe for startup semaphore"); | |
1168 | return; | |
1169 | } | |
1170 | } | |
c906108c | 1171 | \f |
c5aa993b | 1172 | |
c906108c SS |
1173 | /* Check to see if the given thread is alive. |
1174 | ||
1175 | This is a no-op, as ptrace doesn't support threads, so we just | |
1176 | return "TRUE". */ | |
1177 | ||
1178 | int | |
1179 | child_thread_alive (pid) | |
1180 | int pid; | |
1181 | { | |
c5aa993b | 1182 | return 1; |
c906108c SS |
1183 | } |
1184 | ||
1185 | #endif /* ! GDB_NATIVE_HPUX_11 */ |