Commit | Line | Data |
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c906108c | 1 | /* Native support code for HPUX PA-RISC. |
b6ba6518 KB |
2 | Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
3 | 1998, 1999, 2000, 2001 | |
c906108c SS |
4 | Free Software Foundation, Inc. |
5 | ||
6 | Contributed by the Center for Software Science at the | |
7 | University of Utah (pa-gdb-bugs@cs.utah.edu). | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b JM |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
25 | |
26 | ||
27 | #include "defs.h" | |
28 | #include "inferior.h" | |
29 | #include "target.h" | |
30 | #include <sys/ptrace.h> | |
31 | #include "gdbcore.h" | |
a526d713 | 32 | #include "gdb_wait.h" |
4e052eda | 33 | #include "regcache.h" |
c906108c SS |
34 | #include <signal.h> |
35 | ||
36 | extern CORE_ADDR text_end; | |
37 | ||
47932f85 DJ |
38 | extern int hpux_has_forked (int pid, int *childpid); |
39 | extern int hpux_has_vforked (int pid, int *childpid); | |
40 | extern int hpux_has_execd (int pid, char **execd_pathname); | |
41 | extern int hpux_has_syscall_event (int pid, enum target_waitkind *kind, | |
42 | int *syscall_id); | |
43 | ||
a14ed312 | 44 | static void fetch_register (int); |
c906108c SS |
45 | |
46 | void | |
fba45db2 | 47 | fetch_inferior_registers (int regno) |
c906108c SS |
48 | { |
49 | if (regno == -1) | |
50 | for (regno = 0; regno < NUM_REGS; regno++) | |
51 | fetch_register (regno); | |
52 | else | |
53 | fetch_register (regno); | |
54 | } | |
55 | ||
7be570e7 JM |
56 | /* Our own version of the offsetof macro, since we can't assume ANSI C. */ |
57 | #define HPPAH_OFFSETOF(type, member) ((int) (&((type *) 0)->member)) | |
58 | ||
c906108c SS |
59 | /* Store our register values back into the inferior. |
60 | If REGNO is -1, do this for all registers. | |
61 | Otherwise, REGNO specifies which register (so we can save time). */ | |
62 | ||
63 | void | |
fba45db2 | 64 | store_inferior_registers (int regno) |
c906108c SS |
65 | { |
66 | register unsigned int regaddr; | |
67 | char buf[80]; | |
c906108c SS |
68 | register int i; |
69 | unsigned int offset = U_REGS_OFFSET; | |
70 | int scratch; | |
71 | ||
72 | if (regno >= 0) | |
73 | { | |
7be570e7 JM |
74 | unsigned int addr, len, offset; |
75 | ||
c906108c SS |
76 | if (CANNOT_STORE_REGISTER (regno)) |
77 | return; | |
7be570e7 JM |
78 | |
79 | offset = 0; | |
80 | len = REGISTER_RAW_SIZE (regno); | |
81 | ||
82 | /* Requests for register zero actually want the save_state's | |
83 | ss_flags member. As RM says: "Oh, what a hack!" */ | |
84 | if (regno == 0) | |
b83266a0 | 85 | { |
7be570e7 JM |
86 | save_state_t ss; |
87 | addr = HPPAH_OFFSETOF (save_state_t, ss_flags); | |
88 | len = sizeof (ss.ss_flags); | |
89 | ||
90 | /* Note that ss_flags is always an int, no matter what | |
91 | REGISTER_RAW_SIZE(0) says. Assuming all HP-UX PA machines | |
92 | are big-endian, put it at the least significant end of the | |
93 | value, and zap the rest of the buffer. */ | |
94 | offset = REGISTER_RAW_SIZE (0) - len; | |
95 | } | |
96 | ||
97 | /* Floating-point registers come from the ss_fpblock area. */ | |
98 | else if (regno >= FP0_REGNUM) | |
99 | addr = (HPPAH_OFFSETOF (save_state_t, ss_fpblock) | |
100 | + (REGISTER_BYTE (regno) - REGISTER_BYTE (FP0_REGNUM))); | |
101 | ||
102 | /* Wide registers come from the ss_wide area. | |
103 | I think it's more PC to test (ss_flags & SS_WIDEREGS) to select | |
104 | between ss_wide and ss_narrow than to use the raw register size. | |
105 | But checking ss_flags would require an extra ptrace call for | |
106 | every register reference. Bleah. */ | |
107 | else if (len == 8) | |
108 | addr = (HPPAH_OFFSETOF (save_state_t, ss_wide) | |
109 | + REGISTER_BYTE (regno)); | |
110 | ||
111 | /* Narrow registers come from the ss_narrow area. Note that | |
112 | ss_narrow starts with gr1, not gr0. */ | |
113 | else if (len == 4) | |
114 | addr = (HPPAH_OFFSETOF (save_state_t, ss_narrow) | |
115 | + (REGISTER_BYTE (regno) - REGISTER_BYTE (1))); | |
116 | else | |
8e65ff28 AC |
117 | internal_error (__FILE__, __LINE__, |
118 | "hppah-nat.c (write_register): unexpected register size"); | |
7be570e7 JM |
119 | |
120 | #ifdef GDB_TARGET_IS_HPPA_20W | |
121 | /* Unbelieveable. The PC head and tail must be written in 64bit hunks | |
122 | or we will get an error. Worse yet, the oddball ptrace/ttrace | |
123 | layering will not allow us to perform a 64bit register store. | |
124 | ||
125 | What a crock. */ | |
126 | if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM && len == 8) | |
127 | { | |
128 | CORE_ADDR temp; | |
129 | ||
524d7c18 | 130 | temp = *(CORE_ADDR *)&deprecated_registers[REGISTER_BYTE (regno)]; |
7be570e7 JM |
131 | |
132 | /* Set the priv level (stored in the low two bits of the PC. */ | |
133 | temp |= 0x3; | |
134 | ||
39f77062 KB |
135 | ttrace_write_reg_64 (PIDGET (inferior_ptid), (CORE_ADDR)addr, |
136 | (CORE_ADDR)&temp); | |
7be570e7 JM |
137 | |
138 | /* If we fail to write the PC, give a true error instead of | |
139 | just a warning. */ | |
b83266a0 SS |
140 | if (errno != 0) |
141 | { | |
7be570e7 JM |
142 | char *err = safe_strerror (errno); |
143 | char *msg = alloca (strlen (err) + 128); | |
144 | sprintf (msg, "writing `%s' register: %s", | |
145 | REGISTER_NAME (regno), err); | |
146 | perror_with_name (msg); | |
b83266a0 | 147 | } |
7be570e7 | 148 | return; |
b83266a0 | 149 | } |
53a5351d JM |
150 | |
151 | /* Another crock. HPUX complains if you write a nonzero value to | |
152 | the high part of IPSW. What will it take for HP to catch a | |
153 | clue about building sensible interfaces? */ | |
154 | if (regno == IPSW_REGNUM && len == 8) | |
524d7c18 | 155 | *(int *)&deprecated_registers[REGISTER_BYTE (regno)] = 0; |
7be570e7 JM |
156 | #endif |
157 | ||
158 | for (i = 0; i < len; i += sizeof (int)) | |
159 | { | |
160 | errno = 0; | |
39f77062 KB |
161 | call_ptrace (PT_WUREGS, PIDGET (inferior_ptid), |
162 | (PTRACE_ARG3_TYPE) addr + i, | |
524d7c18 | 163 | *(int *) &deprecated_registers[REGISTER_BYTE (regno) + i]); |
7be570e7 JM |
164 | if (errno != 0) |
165 | { | |
166 | /* Warning, not error, in case we are attached; sometimes | |
167 | the kernel doesn't let us at the registers. */ | |
168 | char *err = safe_strerror (errno); | |
169 | char *msg = alloca (strlen (err) + 128); | |
53a5351d | 170 | sprintf (msg, "writing `%s' register: %s", |
7be570e7 JM |
171 | REGISTER_NAME (regno), err); |
172 | /* If we fail to write the PC, give a true error instead of | |
173 | just a warning. */ | |
174 | if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM) | |
175 | perror_with_name (msg); | |
176 | else | |
c906108c | 177 | warning (msg); |
7be570e7 JM |
178 | return; |
179 | } | |
180 | } | |
c906108c SS |
181 | } |
182 | else | |
183 | for (regno = 0; regno < NUM_REGS; regno++) | |
184 | store_inferior_registers (regno); | |
185 | } | |
186 | ||
c906108c | 187 | |
adf40b2e | 188 | /* Fetch a register's value from the process's U area. */ |
c906108c | 189 | static void |
fba45db2 | 190 | fetch_register (int regno) |
c906108c | 191 | { |
c906108c | 192 | char buf[MAX_REGISTER_RAW_SIZE]; |
adf40b2e JM |
193 | unsigned int addr, len, offset; |
194 | int i; | |
c906108c | 195 | |
adf40b2e JM |
196 | offset = 0; |
197 | len = REGISTER_RAW_SIZE (regno); | |
198 | ||
199 | /* Requests for register zero actually want the save_state's | |
200 | ss_flags member. As RM says: "Oh, what a hack!" */ | |
201 | if (regno == 0) | |
202 | { | |
203 | save_state_t ss; | |
204 | addr = HPPAH_OFFSETOF (save_state_t, ss_flags); | |
205 | len = sizeof (ss.ss_flags); | |
206 | ||
207 | /* Note that ss_flags is always an int, no matter what | |
208 | REGISTER_RAW_SIZE(0) says. Assuming all HP-UX PA machines | |
209 | are big-endian, put it at the least significant end of the | |
210 | value, and zap the rest of the buffer. */ | |
211 | offset = REGISTER_RAW_SIZE (0) - len; | |
212 | memset (buf, 0, sizeof (buf)); | |
213 | } | |
c906108c | 214 | |
adf40b2e JM |
215 | /* Floating-point registers come from the ss_fpblock area. */ |
216 | else if (regno >= FP0_REGNUM) | |
217 | addr = (HPPAH_OFFSETOF (save_state_t, ss_fpblock) | |
218 | + (REGISTER_BYTE (regno) - REGISTER_BYTE (FP0_REGNUM))); | |
219 | ||
220 | /* Wide registers come from the ss_wide area. | |
221 | I think it's more PC to test (ss_flags & SS_WIDEREGS) to select | |
222 | between ss_wide and ss_narrow than to use the raw register size. | |
223 | But checking ss_flags would require an extra ptrace call for | |
224 | every register reference. Bleah. */ | |
225 | else if (len == 8) | |
226 | addr = (HPPAH_OFFSETOF (save_state_t, ss_wide) | |
227 | + REGISTER_BYTE (regno)); | |
228 | ||
229 | /* Narrow registers come from the ss_narrow area. Note that | |
230 | ss_narrow starts with gr1, not gr0. */ | |
231 | else if (len == 4) | |
232 | addr = (HPPAH_OFFSETOF (save_state_t, ss_narrow) | |
233 | + (REGISTER_BYTE (regno) - REGISTER_BYTE (1))); | |
c906108c | 234 | |
adf40b2e | 235 | else |
8e65ff28 AC |
236 | internal_error (__FILE__, __LINE__, |
237 | "hppa-nat.c (fetch_register): unexpected register size"); | |
adf40b2e JM |
238 | |
239 | for (i = 0; i < len; i += sizeof (int)) | |
c906108c SS |
240 | { |
241 | errno = 0; | |
adf40b2e JM |
242 | /* Copy an int from the U area to buf. Fill the least |
243 | significant end if len != raw_size. */ | |
244 | * (int *) &buf[offset + i] = | |
39f77062 | 245 | call_ptrace (PT_RUREGS, PIDGET (inferior_ptid), |
adf40b2e | 246 | (PTRACE_ARG3_TYPE) addr + i, 0); |
c906108c SS |
247 | if (errno != 0) |
248 | { | |
adf40b2e JM |
249 | /* Warning, not error, in case we are attached; sometimes |
250 | the kernel doesn't let us at the registers. */ | |
c906108c SS |
251 | char *err = safe_strerror (errno); |
252 | char *msg = alloca (strlen (err) + 128); | |
adf40b2e JM |
253 | sprintf (msg, "reading `%s' register: %s", |
254 | REGISTER_NAME (regno), err); | |
c906108c | 255 | warning (msg); |
adf40b2e | 256 | return; |
c906108c SS |
257 | } |
258 | } | |
adf40b2e JM |
259 | |
260 | /* If we're reading an address from the instruction address queue, | |
261 | mask out the bottom two bits --- they contain the privilege | |
262 | level. */ | |
c906108c | 263 | if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM) |
adf40b2e JM |
264 | buf[len - 1] &= ~0x3; |
265 | ||
c906108c | 266 | supply_register (regno, buf); |
c906108c SS |
267 | } |
268 | ||
adf40b2e | 269 | |
c906108c SS |
270 | /* Copy LEN bytes to or from inferior's memory starting at MEMADDR |
271 | to debugger memory starting at MYADDR. Copy to inferior if | |
272 | WRITE is nonzero. | |
c5aa993b | 273 | |
c906108c SS |
274 | Returns the length copied, which is either the LEN argument or zero. |
275 | This xfer function does not do partial moves, since child_ops | |
276 | doesn't allow memory operations to cross below us in the target stack | |
8fef05cc | 277 | anyway. TARGET is ignored. */ |
c906108c SS |
278 | |
279 | int | |
8fef05cc | 280 | child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
240be855 | 281 | struct mem_attrib *mem, |
8fef05cc | 282 | struct target_ops *target) |
c906108c SS |
283 | { |
284 | register int i; | |
285 | /* Round starting address down to longword boundary. */ | |
a0b3c4fd | 286 | register CORE_ADDR addr = memaddr & - (CORE_ADDR)(sizeof (int)); |
c906108c SS |
287 | /* Round ending address up; get number of longwords that makes. */ |
288 | register int count | |
c5aa993b | 289 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); |
c906108c | 290 | |
b83266a0 SS |
291 | /* Allocate buffer of that many longwords. |
292 | Note -- do not use alloca to allocate this buffer since there is no | |
293 | guarantee of when the buffer will actually be deallocated. | |
294 | ||
295 | This routine can be called over and over with the same call chain; | |
296 | this (in effect) would pile up all those alloca requests until a call | |
297 | to alloca was made from a point higher than this routine in the | |
298 | call chain. */ | |
c906108c SS |
299 | register int *buffer = (int *) xmalloc (count * sizeof (int)); |
300 | ||
301 | if (write) | |
302 | { | |
303 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
c5aa993b | 304 | if (addr != memaddr || len < (int) sizeof (int)) |
b83266a0 SS |
305 | { |
306 | /* Need part of initial word -- fetch it. */ | |
c5aa993b | 307 | buffer[0] = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, |
39f77062 KB |
308 | PIDGET (inferior_ptid), |
309 | (PTRACE_ARG3_TYPE) addr, 0); | |
b83266a0 | 310 | } |
c906108c SS |
311 | |
312 | if (count > 1) /* FIXME, avoid if even boundary */ | |
313 | { | |
314 | buffer[count - 1] | |
b83266a0 | 315 | = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, |
39f77062 | 316 | PIDGET (inferior_ptid), |
b83266a0 SS |
317 | (PTRACE_ARG3_TYPE) (addr |
318 | + (count - 1) * sizeof (int)), | |
319 | 0); | |
c906108c SS |
320 | } |
321 | ||
322 | /* Copy data to be written over corresponding part of buffer */ | |
c906108c SS |
323 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); |
324 | ||
325 | /* Write the entire buffer. */ | |
c906108c SS |
326 | for (i = 0; i < count; i++, addr += sizeof (int)) |
327 | { | |
b83266a0 SS |
328 | int pt_status; |
329 | int pt_request; | |
330 | /* The HP-UX kernel crashes if you use PT_WDUSER to write into the | |
331 | text segment. FIXME -- does it work to write into the data | |
332 | segment using WIUSER, or do these idiots really expect us to | |
333 | figure out which segment the address is in, so we can use a | |
334 | separate system call for it??! */ | |
c906108c | 335 | errno = 0; |
b83266a0 | 336 | pt_request = (addr < text_end) ? PT_WIUSER : PT_WDUSER; |
c906108c | 337 | pt_status = call_ptrace (pt_request, |
39f77062 | 338 | PIDGET (inferior_ptid), |
b83266a0 SS |
339 | (PTRACE_ARG3_TYPE) addr, |
340 | buffer[i]); | |
341 | ||
342 | /* Did we fail? Might we've guessed wrong about which | |
343 | segment this address resides in? Try the other request, | |
344 | and see if that works... */ | |
345 | if ((pt_status == -1) && errno) | |
346 | { | |
347 | errno = 0; | |
348 | pt_request = (pt_request == PT_WIUSER) ? PT_WDUSER : PT_WIUSER; | |
349 | pt_status = call_ptrace (pt_request, | |
39f77062 | 350 | PIDGET (inferior_ptid), |
b83266a0 SS |
351 | (PTRACE_ARG3_TYPE) addr, |
352 | buffer[i]); | |
353 | ||
354 | /* No, we still fail. Okay, time to punt. */ | |
355 | if ((pt_status == -1) && errno) | |
356 | { | |
b8c9b27d | 357 | xfree (buffer); |
b83266a0 SS |
358 | return 0; |
359 | } | |
360 | } | |
c906108c SS |
361 | } |
362 | } | |
363 | else | |
364 | { | |
365 | /* Read all the longwords */ | |
366 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
367 | { | |
368 | errno = 0; | |
c5aa993b | 369 | buffer[i] = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, |
39f77062 KB |
370 | PIDGET (inferior_ptid), |
371 | (PTRACE_ARG3_TYPE) addr, 0); | |
b83266a0 SS |
372 | if (errno) |
373 | { | |
b8c9b27d | 374 | xfree (buffer); |
b83266a0 SS |
375 | return 0; |
376 | } | |
c906108c SS |
377 | QUIT; |
378 | } | |
379 | ||
380 | /* Copy appropriate bytes out of the buffer. */ | |
381 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
382 | } | |
b8c9b27d | 383 | xfree (buffer); |
c906108c SS |
384 | return len; |
385 | } | |
386 | ||
387 | ||
c906108c | 388 | void |
fba45db2 KB |
389 | child_post_follow_vfork (int parent_pid, int followed_parent, int child_pid, |
390 | int followed_child) | |
c906108c | 391 | { |
c906108c SS |
392 | /* Are we a debugger that followed the parent of a vfork? If so, |
393 | then recall that the child's vfork event was delivered to us | |
394 | first. And, that the parent was suspended by the OS until the | |
395 | child's exec or exit events were received. | |
396 | ||
397 | Upon receiving that child vfork, then, we were forced to remove | |
398 | all breakpoints in the child and continue it so that it could | |
399 | reach the exec or exit point. | |
400 | ||
401 | But also recall that the parent and child of a vfork share the | |
402 | same address space. Thus, removing bp's in the child also | |
403 | removed them from the parent. | |
404 | ||
405 | Now that the child has safely exec'd or exited, we must restore | |
406 | the parent's breakpoints before we continue it. Else, we may | |
407 | cause it run past expected stopping points. */ | |
408 | if (followed_parent) | |
409 | { | |
410 | reattach_breakpoints (parent_pid); | |
411 | } | |
412 | ||
413 | /* Are we a debugger that followed the child of a vfork? If so, | |
414 | then recall that we don't actually acquire control of the child | |
b83266a0 | 415 | until after it has exec'd or exited. */ |
c906108c SS |
416 | if (followed_child) |
417 | { | |
418 | /* If the child has exited, then there's nothing for us to do. | |
c5aa993b JM |
419 | In the case of an exec event, we'll let that be handled by |
420 | the normal mechanism that notices and handles exec events, in | |
421 | resume(). */ | |
c906108c SS |
422 | } |
423 | } | |
424 | ||
b83266a0 SS |
425 | /* Format a process id, given PID. Be sure to terminate |
426 | this with a null--it's going to be printed via a "%s". */ | |
c906108c | 427 | char * |
39f77062 | 428 | child_pid_to_str (ptid_t ptid) |
c906108c | 429 | { |
c5aa993b JM |
430 | /* Static because address returned */ |
431 | static char buf[30]; | |
39f77062 | 432 | pid_t pid = PIDGET (ptid); |
c906108c | 433 | |
ce414844 AC |
434 | /* Extra NUL for paranoia's sake */ |
435 | sprintf (buf, "process %d%c", pid, '\0'); | |
c5aa993b JM |
436 | |
437 | return buf; | |
c906108c SS |
438 | } |
439 | ||
b83266a0 SS |
440 | /* Format a thread id, given TID. Be sure to terminate |
441 | this with a null--it's going to be printed via a "%s". | |
442 | ||
443 | Note: This is a core-gdb tid, not the actual system tid. | |
c5aa993b | 444 | See infttrace.c for details. */ |
c906108c | 445 | char * |
39f77062 | 446 | hppa_tid_to_str (ptid_t ptid) |
c906108c | 447 | { |
c5aa993b JM |
448 | /* Static because address returned */ |
449 | static char buf[30]; | |
39f77062 KB |
450 | /* This seems strange, but when I did the ptid conversion, it looked |
451 | as though a pid was always being passed. - Kevin Buettner */ | |
452 | pid_t tid = PIDGET (ptid); | |
c5aa993b JM |
453 | |
454 | /* Extra NULLs for paranoia's sake */ | |
ce414844 | 455 | sprintf (buf, "system thread %d%c", tid, '\0'); |
c906108c | 456 | |
c5aa993b | 457 | return buf; |
c906108c SS |
458 | } |
459 | ||
47932f85 DJ |
460 | /*## */ |
461 | /* Enable HACK for ttrace work. In | |
462 | * infttrace.c/require_notification_of_events, | |
463 | * this is set to 0 so that the loop in child_wait | |
464 | * won't loop. | |
465 | */ | |
466 | int not_same_real_pid = 1; | |
467 | /*## */ | |
468 | ||
469 | ||
470 | /* Wait for child to do something. Return pid of child, or -1 in case | |
471 | of error; store status through argument pointer OURSTATUS. */ | |
472 | ||
473 | ptid_t | |
474 | child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) | |
475 | { | |
476 | int save_errno; | |
477 | int status; | |
478 | char *execd_pathname = NULL; | |
479 | int exit_status; | |
480 | int related_pid; | |
481 | int syscall_id; | |
482 | enum target_waitkind kind; | |
483 | int pid; | |
484 | ||
485 | do | |
486 | { | |
487 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
488 | attached process. */ | |
489 | set_sigio_trap (); | |
490 | ||
491 | pid = ptrace_wait (inferior_ptid, &status); | |
492 | ||
493 | save_errno = errno; | |
494 | ||
495 | clear_sigio_trap (); | |
496 | ||
497 | clear_sigint_trap (); | |
498 | ||
499 | if (pid == -1) | |
500 | { | |
501 | if (save_errno == EINTR) | |
502 | continue; | |
503 | ||
504 | fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", | |
505 | safe_strerror (save_errno)); | |
506 | ||
507 | /* Claim it exited with unknown signal. */ | |
508 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
509 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
510 | return pid_to_ptid (-1); | |
511 | } | |
512 | ||
513 | /* Did it exit? | |
514 | */ | |
515 | if (target_has_exited (pid, status, &exit_status)) | |
516 | { | |
517 | /* ??rehrauer: For now, ignore this. */ | |
518 | continue; | |
519 | } | |
520 | ||
521 | if (!target_thread_alive (pid_to_ptid (pid))) | |
522 | { | |
523 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
524 | return pid_to_ptid (pid); | |
525 | } | |
526 | ||
527 | if (hpux_has_forked (pid, &related_pid) | |
528 | && ((pid == PIDGET (inferior_ptid)) | |
529 | || (related_pid == PIDGET (inferior_ptid)))) | |
530 | { | |
531 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
532 | ourstatus->value.related_pid = related_pid; | |
533 | return pid_to_ptid (pid); | |
534 | } | |
535 | ||
536 | if (hpux_has_vforked (pid, &related_pid) | |
537 | && ((pid == PIDGET (inferior_ptid)) | |
538 | || (related_pid == PIDGET (inferior_ptid)))) | |
539 | { | |
540 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
541 | ourstatus->value.related_pid = related_pid; | |
542 | return pid_to_ptid (pid); | |
543 | } | |
544 | ||
545 | if (hpux_has_execd (pid, &execd_pathname)) | |
546 | { | |
547 | /* Are we ignoring initial exec events? (This is likely because | |
548 | we're in the process of starting up the inferior, and another | |
549 | (older) mechanism handles those.) If so, we'll report this | |
550 | as a regular stop, not an exec. | |
551 | */ | |
552 | if (inferior_ignoring_startup_exec_events) | |
553 | { | |
554 | inferior_ignoring_startup_exec_events--; | |
555 | } | |
556 | else | |
557 | { | |
558 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
559 | ourstatus->value.execd_pathname = execd_pathname; | |
560 | return pid_to_ptid (pid); | |
561 | } | |
562 | } | |
563 | ||
564 | /* All we must do with these is communicate their occurrence | |
565 | to wait_for_inferior... | |
566 | */ | |
567 | if (hpux_has_syscall_event (pid, &kind, &syscall_id)) | |
568 | { | |
569 | ourstatus->kind = kind; | |
570 | ourstatus->value.syscall_id = syscall_id; | |
571 | return pid_to_ptid (pid); | |
572 | } | |
573 | ||
574 | /*## } while (pid != PIDGET (inferior_ptid)); ## *//* Some other child died or stopped */ | |
575 | /* hack for thread testing */ | |
576 | } | |
577 | while ((pid != PIDGET (inferior_ptid)) && not_same_real_pid); | |
578 | /*## */ | |
579 | ||
580 | store_waitstatus (ourstatus, status); | |
581 | return pid_to_ptid (pid); | |
582 | } | |
583 | ||
c906108c SS |
584 | #if !defined (GDB_NATIVE_HPUX_11) |
585 | ||
586 | /* The following code is a substitute for the infttrace.c versions used | |
587 | with ttrace() in HPUX 11. */ | |
588 | ||
589 | /* This value is an arbitrary integer. */ | |
590 | #define PT_VERSION 123456 | |
591 | ||
592 | /* This semaphore is used to coordinate the child and parent processes | |
593 | after a fork(), and before an exec() by the child. See | |
594 | parent_attach_all for details. */ | |
595 | ||
c5aa993b JM |
596 | typedef struct |
597 | { | |
598 | int parent_channel[2]; /* Parent "talks" to [1], child "listens" to [0] */ | |
599 | int child_channel[2]; /* Child "talks" to [1], parent "listens" to [0] */ | |
600 | } | |
601 | startup_semaphore_t; | |
c906108c SS |
602 | |
603 | #define SEM_TALK (1) | |
604 | #define SEM_LISTEN (0) | |
605 | ||
c5aa993b | 606 | static startup_semaphore_t startup_semaphore; |
c906108c | 607 | |
a14ed312 | 608 | extern int parent_attach_all (int, PTRACE_ARG3_TYPE, int); |
c906108c SS |
609 | |
610 | #ifdef PT_SETTRC | |
611 | /* This function causes the caller's process to be traced by its | |
612 | parent. This is intended to be called after GDB forks itself, | |
613 | and before the child execs the target. | |
614 | ||
615 | Note that HP-UX ptrace is rather funky in how this is done. | |
616 | If the parent wants to get the initial exec event of a child, | |
617 | it must set the ptrace event mask of the child to include execs. | |
618 | (The child cannot do this itself.) This must be done after the | |
619 | child is forked, but before it execs. | |
620 | ||
621 | To coordinate the parent and child, we implement a semaphore using | |
622 | pipes. After SETTRC'ing itself, the child tells the parent that | |
623 | it is now traceable by the parent, and waits for the parent's | |
624 | acknowledgement. The parent can then set the child's event mask, | |
625 | and notify the child that it can now exec. | |
626 | ||
627 | (The acknowledgement by parent happens as a result of a call to | |
628 | child_acknowledge_created_inferior.) */ | |
629 | ||
630 | int | |
fba45db2 | 631 | parent_attach_all (int pid, PTRACE_ARG3_TYPE addr, int data) |
c906108c SS |
632 | { |
633 | int pt_status = 0; | |
634 | ||
635 | /* We need a memory home for a constant. */ | |
636 | int tc_magic_child = PT_VERSION; | |
637 | int tc_magic_parent = 0; | |
638 | ||
639 | /* The remainder of this function is only useful for HPUX 10.0 and | |
640 | later, as it depends upon the ability to request notification | |
641 | of specific kinds of events by the kernel. */ | |
642 | #if defined(PT_SET_EVENT_MASK) | |
643 | ||
644 | /* Notify the parent that we're potentially ready to exec(). */ | |
645 | write (startup_semaphore.child_channel[SEM_TALK], | |
b83266a0 SS |
646 | &tc_magic_child, |
647 | sizeof (tc_magic_child)); | |
c906108c SS |
648 | |
649 | /* Wait for acknowledgement from the parent. */ | |
650 | read (startup_semaphore.parent_channel[SEM_LISTEN], | |
b83266a0 SS |
651 | &tc_magic_parent, |
652 | sizeof (tc_magic_parent)); | |
c906108c | 653 | if (tc_magic_child != tc_magic_parent) |
c5aa993b | 654 | warning ("mismatched semaphore magic"); |
c906108c SS |
655 | |
656 | /* Discard our copy of the semaphore. */ | |
657 | (void) close (startup_semaphore.parent_channel[SEM_LISTEN]); | |
658 | (void) close (startup_semaphore.parent_channel[SEM_TALK]); | |
659 | (void) close (startup_semaphore.child_channel[SEM_LISTEN]); | |
660 | (void) close (startup_semaphore.child_channel[SEM_TALK]); | |
661 | #endif | |
c5aa993b | 662 | |
c906108c SS |
663 | return 0; |
664 | } | |
665 | #endif | |
666 | ||
667 | int | |
fba45db2 | 668 | hppa_require_attach (int pid) |
c906108c SS |
669 | { |
670 | int pt_status; | |
b83266a0 SS |
671 | CORE_ADDR pc; |
672 | CORE_ADDR pc_addr; | |
c906108c SS |
673 | unsigned int regs_offset; |
674 | ||
675 | /* Are we already attached? There appears to be no explicit way to | |
676 | answer this via ptrace, so we try something which should be | |
677 | innocuous if we are attached. If that fails, then we assume | |
678 | we're not attached, and so attempt to make it so. */ | |
679 | ||
680 | errno = 0; | |
681 | regs_offset = U_REGS_OFFSET; | |
682 | pc_addr = register_addr (PC_REGNUM, regs_offset); | |
683 | pc = call_ptrace (PT_READ_U, pid, (PTRACE_ARG3_TYPE) pc_addr, 0); | |
684 | ||
685 | if (errno) | |
686 | { | |
687 | errno = 0; | |
688 | pt_status = call_ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0); | |
689 | ||
690 | if (errno) | |
b83266a0 | 691 | return -1; |
c906108c SS |
692 | |
693 | /* Now we really are attached. */ | |
694 | errno = 0; | |
695 | } | |
696 | attach_flag = 1; | |
697 | return pid; | |
698 | } | |
699 | ||
700 | int | |
fba45db2 | 701 | hppa_require_detach (int pid, int signal) |
c906108c SS |
702 | { |
703 | errno = 0; | |
704 | call_ptrace (PT_DETACH, pid, (PTRACE_ARG3_TYPE) 1, signal); | |
c5aa993b | 705 | errno = 0; /* Ignore any errors. */ |
c906108c SS |
706 | return pid; |
707 | } | |
708 | ||
709 | /* Since ptrace doesn't support memory page-protection events, which | |
710 | are used to implement "hardware" watchpoints on HP-UX, these are | |
711 | dummy versions, which perform no useful work. */ | |
712 | ||
713 | void | |
fba45db2 | 714 | hppa_enable_page_protection_events (int pid) |
c906108c SS |
715 | { |
716 | } | |
717 | ||
718 | void | |
fba45db2 | 719 | hppa_disable_page_protection_events (int pid) |
c906108c SS |
720 | { |
721 | } | |
722 | ||
723 | int | |
fba45db2 | 724 | hppa_insert_hw_watchpoint (int pid, CORE_ADDR start, LONGEST len, int type) |
c906108c SS |
725 | { |
726 | error ("Hardware watchpoints not implemented on this platform."); | |
727 | } | |
728 | ||
729 | int | |
fba45db2 KB |
730 | hppa_remove_hw_watchpoint (int pid, CORE_ADDR start, LONGEST len, |
731 | enum bptype type) | |
c906108c SS |
732 | { |
733 | error ("Hardware watchpoints not implemented on this platform."); | |
734 | } | |
735 | ||
736 | int | |
fba45db2 | 737 | hppa_can_use_hw_watchpoint (enum bptype type, int cnt, enum bptype ot) |
c906108c SS |
738 | { |
739 | return 0; | |
740 | } | |
741 | ||
742 | int | |
fba45db2 | 743 | hppa_range_profitable_for_hw_watchpoint (int pid, CORE_ADDR start, LONGEST len) |
c906108c SS |
744 | { |
745 | error ("Hardware watchpoints not implemented on this platform."); | |
746 | } | |
747 | ||
748 | char * | |
39f77062 | 749 | hppa_pid_or_tid_to_str (ptid_t id) |
c906108c SS |
750 | { |
751 | /* In the ptrace world, there are only processes. */ | |
ed9a39eb | 752 | return child_pid_to_str (id); |
c906108c SS |
753 | } |
754 | ||
755 | /* This function has no meaning in a non-threaded world. Thus, we | |
756 | return 0 (FALSE). See the use of "hppa_prepare_to_proceed" in | |
757 | hppa-tdep.c. */ | |
758 | ||
759 | pid_t | |
fba45db2 | 760 | hppa_switched_threads (pid_t pid) |
c906108c SS |
761 | { |
762 | return (pid_t) 0; | |
763 | } | |
764 | ||
765 | void | |
fba45db2 | 766 | hppa_ensure_vforking_parent_remains_stopped (int pid) |
c906108c SS |
767 | { |
768 | /* This assumes that the vforked parent is presently stopped, and | |
769 | that the vforked child has just delivered its first exec event. | |
770 | Calling kill() this way will cause the SIGTRAP to be delivered as | |
771 | soon as the parent is resumed, which happens as soon as the | |
772 | vforked child is resumed. See wait_for_inferior for the use of | |
773 | this function. */ | |
774 | kill (pid, SIGTRAP); | |
775 | } | |
776 | ||
777 | int | |
fba45db2 | 778 | hppa_resume_execd_vforking_child_to_get_parent_vfork (void) |
c906108c | 779 | { |
c5aa993b | 780 | return 1; /* Yes, the child must be resumed. */ |
c906108c SS |
781 | } |
782 | ||
783 | void | |
fba45db2 | 784 | require_notification_of_events (int pid) |
c906108c SS |
785 | { |
786 | #if defined(PT_SET_EVENT_MASK) | |
787 | int pt_status; | |
788 | ptrace_event_t ptrace_events; | |
c2d11a7d JM |
789 | int nsigs; |
790 | int signum; | |
c906108c SS |
791 | |
792 | /* Instruct the kernel as to the set of events we wish to be | |
793 | informed of. (This support does not exist before HPUX 10.0. | |
794 | We'll assume if PT_SET_EVENT_MASK has not been defined by | |
b83266a0 | 795 | <sys/ptrace.h>, then we're being built on pre-10.0.) */ |
c906108c SS |
796 | memset (&ptrace_events, 0, sizeof (ptrace_events)); |
797 | ||
798 | /* Note: By default, all signals are visible to us. If we wish | |
799 | the kernel to keep certain signals hidden from us, we do it | |
800 | by calling sigdelset (ptrace_events.pe_signals, signal) for | |
b83266a0 | 801 | each such signal here, before doing PT_SET_EVENT_MASK. */ |
c2d11a7d JM |
802 | /* RM: The above comment is no longer true. We start with ignoring |
803 | all signals, and then add the ones we are interested in. We could | |
804 | do it the other way: start by looking at all signals and then | |
805 | deleting the ones that we aren't interested in, except that | |
806 | multiple gdb signals may be mapped to the same host signal | |
807 | (eg. TARGET_SIGNAL_IO and TARGET_SIGNAL_POLL both get mapped to | |
808 | signal 22 on HPUX 10.20) We want to be notified if we are | |
809 | interested in either signal. */ | |
810 | sigfillset (&ptrace_events.pe_signals); | |
811 | ||
812 | /* RM: Let's not bother with signals we don't care about */ | |
813 | nsigs = (int) TARGET_SIGNAL_LAST; | |
814 | for (signum = nsigs; signum > 0; signum--) | |
815 | { | |
816 | if ((signal_stop_state (signum)) || | |
817 | (signal_print_state (signum)) || | |
818 | (!signal_pass_state (signum))) | |
819 | { | |
820 | if (target_signal_to_host_p (signum)) | |
821 | sigdelset (&ptrace_events.pe_signals, | |
822 | target_signal_to_host (signum)); | |
823 | } | |
824 | } | |
c906108c SS |
825 | |
826 | ptrace_events.pe_set_event = 0; | |
827 | ||
828 | ptrace_events.pe_set_event |= PTRACE_SIGNAL; | |
829 | ptrace_events.pe_set_event |= PTRACE_EXEC; | |
830 | ptrace_events.pe_set_event |= PTRACE_FORK; | |
831 | ptrace_events.pe_set_event |= PTRACE_VFORK; | |
832 | /* ??rehrauer: Add this one when we're prepared to catch it... | |
c5aa993b JM |
833 | ptrace_events.pe_set_event |= PTRACE_EXIT; |
834 | */ | |
c906108c SS |
835 | |
836 | errno = 0; | |
837 | pt_status = call_ptrace (PT_SET_EVENT_MASK, | |
c5aa993b JM |
838 | pid, |
839 | (PTRACE_ARG3_TYPE) & ptrace_events, | |
840 | sizeof (ptrace_events)); | |
c906108c SS |
841 | if (errno) |
842 | perror_with_name ("ptrace"); | |
843 | if (pt_status < 0) | |
844 | return; | |
845 | #endif | |
846 | } | |
847 | ||
848 | void | |
fba45db2 | 849 | require_notification_of_exec_events (int pid) |
c906108c SS |
850 | { |
851 | #if defined(PT_SET_EVENT_MASK) | |
852 | int pt_status; | |
853 | ptrace_event_t ptrace_events; | |
854 | ||
855 | /* Instruct the kernel as to the set of events we wish to be | |
856 | informed of. (This support does not exist before HPUX 10.0. | |
857 | We'll assume if PT_SET_EVENT_MASK has not been defined by | |
b83266a0 | 858 | <sys/ptrace.h>, then we're being built on pre-10.0.) */ |
c906108c SS |
859 | memset (&ptrace_events, 0, sizeof (ptrace_events)); |
860 | ||
861 | /* Note: By default, all signals are visible to us. If we wish | |
862 | the kernel to keep certain signals hidden from us, we do it | |
863 | by calling sigdelset (ptrace_events.pe_signals, signal) for | |
b83266a0 | 864 | each such signal here, before doing PT_SET_EVENT_MASK. */ |
c906108c SS |
865 | sigemptyset (&ptrace_events.pe_signals); |
866 | ||
867 | ptrace_events.pe_set_event = 0; | |
868 | ||
869 | ptrace_events.pe_set_event |= PTRACE_EXEC; | |
870 | /* ??rehrauer: Add this one when we're prepared to catch it... | |
c5aa993b JM |
871 | ptrace_events.pe_set_event |= PTRACE_EXIT; |
872 | */ | |
c906108c SS |
873 | |
874 | errno = 0; | |
875 | pt_status = call_ptrace (PT_SET_EVENT_MASK, | |
c5aa993b JM |
876 | pid, |
877 | (PTRACE_ARG3_TYPE) & ptrace_events, | |
878 | sizeof (ptrace_events)); | |
c906108c SS |
879 | if (errno) |
880 | perror_with_name ("ptrace"); | |
881 | if (pt_status < 0) | |
882 | return; | |
883 | #endif | |
884 | } | |
885 | ||
886 | /* This function is called by the parent process, with pid being the | |
887 | ID of the child process, after the debugger has forked. */ | |
888 | ||
889 | void | |
fba45db2 | 890 | child_acknowledge_created_inferior (int pid) |
c906108c SS |
891 | { |
892 | /* We need a memory home for a constant. */ | |
893 | int tc_magic_parent = PT_VERSION; | |
894 | int tc_magic_child = 0; | |
895 | ||
b83266a0 SS |
896 | /* The remainder of this function is only useful for HPUX 10.0 and |
897 | later, as it depends upon the ability to request notification | |
898 | of specific kinds of events by the kernel. */ | |
899 | #if defined(PT_SET_EVENT_MASK) | |
c906108c SS |
900 | /* Wait for the child to tell us that it has forked. */ |
901 | read (startup_semaphore.child_channel[SEM_LISTEN], | |
b83266a0 | 902 | &tc_magic_child, |
c5aa993b | 903 | sizeof (tc_magic_child)); |
c906108c SS |
904 | |
905 | /* Notify the child that it can exec. | |
906 | ||
907 | In the infttrace.c variant of this function, we set the child's | |
908 | event mask after the fork but before the exec. In the ptrace | |
909 | world, it seems we can't set the event mask until after the exec. */ | |
c906108c | 910 | write (startup_semaphore.parent_channel[SEM_TALK], |
b83266a0 SS |
911 | &tc_magic_parent, |
912 | sizeof (tc_magic_parent)); | |
c906108c SS |
913 | |
914 | /* We'd better pause a bit before trying to set the event mask, | |
915 | though, to ensure that the exec has happened. We don't want to | |
916 | wait() on the child, because that'll screw up the upper layers | |
917 | of gdb's execution control that expect to see the exec event. | |
918 | ||
919 | After an exec, the child is no longer executing gdb code. Hence, | |
920 | we can't have yet another synchronization via the pipes. We'll | |
921 | just sleep for a second, and hope that's enough delay... */ | |
c906108c SS |
922 | sleep (1); |
923 | ||
924 | /* Instruct the kernel as to the set of events we wish to be | |
925 | informed of. */ | |
c906108c SS |
926 | require_notification_of_exec_events (pid); |
927 | ||
928 | /* Discard our copy of the semaphore. */ | |
929 | (void) close (startup_semaphore.parent_channel[SEM_LISTEN]); | |
930 | (void) close (startup_semaphore.parent_channel[SEM_TALK]); | |
931 | (void) close (startup_semaphore.child_channel[SEM_LISTEN]); | |
932 | (void) close (startup_semaphore.child_channel[SEM_TALK]); | |
b83266a0 | 933 | #endif |
c906108c SS |
934 | } |
935 | ||
936 | void | |
39f77062 | 937 | child_post_startup_inferior (ptid_t ptid) |
c906108c | 938 | { |
39f77062 | 939 | require_notification_of_events (PIDGET (ptid)); |
c906108c SS |
940 | } |
941 | ||
942 | void | |
fba45db2 | 943 | child_post_attach (int pid) |
c906108c SS |
944 | { |
945 | require_notification_of_events (pid); | |
946 | } | |
947 | ||
948 | int | |
fba45db2 | 949 | child_insert_fork_catchpoint (int pid) |
c906108c SS |
950 | { |
951 | /* This request is only available on HPUX 10.0 and later. */ | |
952 | #if !defined(PT_SET_EVENT_MASK) | |
953 | error ("Unable to catch forks prior to HPUX 10.0"); | |
954 | #else | |
955 | /* Enable reporting of fork events from the kernel. */ | |
956 | /* ??rehrauer: For the moment, we're always enabling these events, | |
b83266a0 | 957 | and just ignoring them if there's no catchpoint to catch them. */ |
c906108c SS |
958 | return 0; |
959 | #endif | |
960 | } | |
961 | ||
962 | int | |
fba45db2 | 963 | child_remove_fork_catchpoint (int pid) |
c906108c SS |
964 | { |
965 | /* This request is only available on HPUX 10.0 and later. */ | |
966 | #if !defined(PT_SET_EVENT_MASK) | |
967 | error ("Unable to catch forks prior to HPUX 10.0"); | |
968 | #else | |
969 | /* Disable reporting of fork events from the kernel. */ | |
970 | /* ??rehrauer: For the moment, we're always enabling these events, | |
971 | and just ignoring them if there's no catchpoint to catch them. */ | |
972 | return 0; | |
973 | #endif | |
974 | } | |
975 | ||
976 | int | |
fba45db2 | 977 | child_insert_vfork_catchpoint (int pid) |
c906108c SS |
978 | { |
979 | /* This request is only available on HPUX 10.0 and later. */ | |
980 | #if !defined(PT_SET_EVENT_MASK) | |
981 | error ("Unable to catch vforks prior to HPUX 10.0"); | |
982 | #else | |
983 | /* Enable reporting of vfork events from the kernel. */ | |
984 | /* ??rehrauer: For the moment, we're always enabling these events, | |
985 | and just ignoring them if there's no catchpoint to catch them. */ | |
986 | return 0; | |
987 | #endif | |
988 | } | |
989 | ||
990 | int | |
fba45db2 | 991 | child_remove_vfork_catchpoint (int pid) |
c906108c SS |
992 | { |
993 | /* This request is only available on HPUX 10.0 and later. */ | |
994 | #if !defined(PT_SET_EVENT_MASK) | |
995 | error ("Unable to catch vforks prior to HPUX 10.0"); | |
996 | #else | |
997 | /* Disable reporting of vfork events from the kernel. */ | |
998 | /* ??rehrauer: For the moment, we're always enabling these events, | |
999 | and just ignoring them if there's no catchpoint to catch them. */ | |
1000 | return 0; | |
1001 | #endif | |
1002 | } | |
1003 | ||
1004 | int | |
47932f85 | 1005 | hpux_has_forked (int pid, int *childpid) |
c906108c SS |
1006 | { |
1007 | /* This request is only available on HPUX 10.0 and later. */ | |
1008 | #if !defined(PT_GET_PROCESS_STATE) | |
1009 | *childpid = 0; | |
1010 | return 0; | |
1011 | #else | |
1012 | int pt_status; | |
c5aa993b | 1013 | ptrace_state_t ptrace_state; |
c906108c SS |
1014 | |
1015 | errno = 0; | |
1016 | pt_status = call_ptrace (PT_GET_PROCESS_STATE, | |
b83266a0 | 1017 | pid, |
c5aa993b | 1018 | (PTRACE_ARG3_TYPE) & ptrace_state, |
b83266a0 | 1019 | sizeof (ptrace_state)); |
c906108c SS |
1020 | if (errno) |
1021 | perror_with_name ("ptrace"); | |
1022 | if (pt_status < 0) | |
1023 | return 0; | |
1024 | ||
1025 | if (ptrace_state.pe_report_event & PTRACE_FORK) | |
1026 | { | |
1027 | *childpid = ptrace_state.pe_other_pid; | |
1028 | return 1; | |
1029 | } | |
1030 | ||
1031 | return 0; | |
1032 | #endif | |
1033 | } | |
1034 | ||
1035 | int | |
47932f85 | 1036 | hpux_has_vforked (int pid, int *childpid) |
c906108c SS |
1037 | { |
1038 | /* This request is only available on HPUX 10.0 and later. */ | |
1039 | #if !defined(PT_GET_PROCESS_STATE) | |
1040 | *childpid = 0; | |
1041 | return 0; | |
1042 | ||
1043 | #else | |
1044 | int pt_status; | |
c5aa993b | 1045 | ptrace_state_t ptrace_state; |
c906108c SS |
1046 | |
1047 | errno = 0; | |
1048 | pt_status = call_ptrace (PT_GET_PROCESS_STATE, | |
b83266a0 | 1049 | pid, |
c5aa993b | 1050 | (PTRACE_ARG3_TYPE) & ptrace_state, |
b83266a0 | 1051 | sizeof (ptrace_state)); |
c906108c SS |
1052 | if (errno) |
1053 | perror_with_name ("ptrace"); | |
1054 | if (pt_status < 0) | |
1055 | return 0; | |
1056 | ||
1057 | if (ptrace_state.pe_report_event & PTRACE_VFORK) | |
1058 | { | |
1059 | *childpid = ptrace_state.pe_other_pid; | |
1060 | return 1; | |
1061 | } | |
1062 | ||
1063 | return 0; | |
1064 | #endif | |
1065 | } | |
1066 | ||
c906108c | 1067 | int |
fba45db2 | 1068 | child_insert_exec_catchpoint (int pid) |
c906108c | 1069 | { |
b83266a0 | 1070 | /* This request is only available on HPUX 10.0 and later. */ |
c906108c SS |
1071 | #if !defined(PT_SET_EVENT_MASK) |
1072 | error ("Unable to catch execs prior to HPUX 10.0"); | |
1073 | ||
1074 | #else | |
b83266a0 | 1075 | /* Enable reporting of exec events from the kernel. */ |
c906108c | 1076 | /* ??rehrauer: For the moment, we're always enabling these events, |
b83266a0 | 1077 | and just ignoring them if there's no catchpoint to catch them. */ |
c906108c SS |
1078 | return 0; |
1079 | #endif | |
1080 | } | |
1081 | ||
1082 | int | |
fba45db2 | 1083 | child_remove_exec_catchpoint (int pid) |
c906108c | 1084 | { |
b83266a0 | 1085 | /* This request is only available on HPUX 10.0 and later. */ |
c906108c SS |
1086 | #if !defined(PT_SET_EVENT_MASK) |
1087 | error ("Unable to catch execs prior to HPUX 10.0"); | |
1088 | ||
1089 | #else | |
1090 | /* Disable reporting of exec events from the kernel. */ | |
1091 | /* ??rehrauer: For the moment, we're always enabling these events, | |
b83266a0 | 1092 | and just ignoring them if there's no catchpoint to catch them. */ |
c906108c SS |
1093 | return 0; |
1094 | #endif | |
1095 | } | |
1096 | ||
1097 | int | |
47932f85 | 1098 | hpux_has_execd (int pid, char **execd_pathname) |
c906108c | 1099 | { |
b83266a0 | 1100 | /* This request is only available on HPUX 10.0 and later. */ |
c906108c SS |
1101 | #if !defined(PT_GET_PROCESS_STATE) |
1102 | *execd_pathname = NULL; | |
1103 | return 0; | |
1104 | ||
1105 | #else | |
1106 | int pt_status; | |
c5aa993b | 1107 | ptrace_state_t ptrace_state; |
c906108c SS |
1108 | |
1109 | errno = 0; | |
1110 | pt_status = call_ptrace (PT_GET_PROCESS_STATE, | |
b83266a0 | 1111 | pid, |
c5aa993b | 1112 | (PTRACE_ARG3_TYPE) & ptrace_state, |
b83266a0 | 1113 | sizeof (ptrace_state)); |
c906108c SS |
1114 | if (errno) |
1115 | perror_with_name ("ptrace"); | |
1116 | if (pt_status < 0) | |
1117 | return 0; | |
1118 | ||
1119 | if (ptrace_state.pe_report_event & PTRACE_EXEC) | |
1120 | { | |
c5aa993b | 1121 | char *exec_file = target_pid_to_exec_file (pid); |
c906108c SS |
1122 | *execd_pathname = savestring (exec_file, strlen (exec_file)); |
1123 | return 1; | |
1124 | } | |
1125 | ||
1126 | return 0; | |
1127 | #endif | |
1128 | } | |
1129 | ||
1130 | int | |
fba45db2 | 1131 | child_reported_exec_events_per_exec_call (void) |
c906108c | 1132 | { |
c5aa993b | 1133 | return 2; /* ptrace reports the event twice per call. */ |
c906108c SS |
1134 | } |
1135 | ||
1136 | int | |
47932f85 | 1137 | hpux_has_syscall_event (int pid, enum target_waitkind *kind, int *syscall_id) |
c906108c SS |
1138 | { |
1139 | /* This request is only available on HPUX 10.30 and later, via | |
1140 | the ttrace interface. */ | |
1141 | ||
1142 | *kind = TARGET_WAITKIND_SPURIOUS; | |
1143 | *syscall_id = -1; | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | char * | |
fba45db2 | 1148 | child_pid_to_exec_file (int pid) |
c906108c | 1149 | { |
b83266a0 | 1150 | static char exec_file_buffer[1024]; |
c906108c | 1151 | int pt_status; |
b83266a0 SS |
1152 | CORE_ADDR top_of_stack; |
1153 | char four_chars[4]; | |
c906108c SS |
1154 | int name_index; |
1155 | int i; | |
39f77062 | 1156 | ptid_t saved_inferior_ptid; |
b83266a0 | 1157 | boolean done; |
c5aa993b | 1158 | |
c906108c SS |
1159 | #ifdef PT_GET_PROCESS_PATHNAME |
1160 | /* As of 10.x HP-UX, there's an explicit request to get the pathname. */ | |
1161 | pt_status = call_ptrace (PT_GET_PROCESS_PATHNAME, | |
b83266a0 SS |
1162 | pid, |
1163 | (PTRACE_ARG3_TYPE) exec_file_buffer, | |
1164 | sizeof (exec_file_buffer) - 1); | |
c906108c SS |
1165 | if (pt_status == 0) |
1166 | return exec_file_buffer; | |
1167 | #endif | |
1168 | ||
1169 | /* It appears that this request is broken prior to 10.30. | |
1170 | If it fails, try a really, truly amazingly gross hack | |
1171 | that DDE uses, of pawing through the process' data | |
1172 | segment to find the pathname. */ | |
1173 | ||
1174 | top_of_stack = 0x7b03a000; | |
1175 | name_index = 0; | |
1176 | done = 0; | |
1177 | ||
39f77062 KB |
1178 | /* On the chance that pid != inferior_ptid, set inferior_ptid |
1179 | to pid, so that (grrrr!) implicit uses of inferior_ptid get | |
c906108c SS |
1180 | the right id. */ |
1181 | ||
39f77062 KB |
1182 | saved_inferior_ptid = inferior_ptid; |
1183 | inferior_ptid = pid_to_ptid (pid); | |
c906108c SS |
1184 | |
1185 | /* Try to grab a null-terminated string. */ | |
c5aa993b | 1186 | while (!done) |
c906108c SS |
1187 | { |
1188 | if (target_read_memory (top_of_stack, four_chars, 4) != 0) | |
1189 | { | |
39f77062 | 1190 | inferior_ptid = saved_inferior_ptid; |
c906108c SS |
1191 | return NULL; |
1192 | } | |
1193 | for (i = 0; i < 4; i++) | |
1194 | { | |
1195 | exec_file_buffer[name_index++] = four_chars[i]; | |
1196 | done = (four_chars[i] == '\0'); | |
1197 | if (done) | |
1198 | break; | |
1199 | } | |
1200 | top_of_stack += 4; | |
1201 | } | |
1202 | ||
1203 | if (exec_file_buffer[0] == '\0') | |
1204 | { | |
39f77062 | 1205 | inferior_ptid = saved_inferior_ptid; |
c906108c SS |
1206 | return NULL; |
1207 | } | |
1208 | ||
39f77062 | 1209 | inferior_ptid = saved_inferior_ptid; |
c906108c SS |
1210 | return exec_file_buffer; |
1211 | } | |
1212 | ||
1213 | void | |
fba45db2 | 1214 | pre_fork_inferior (void) |
c906108c SS |
1215 | { |
1216 | int status; | |
1217 | ||
1218 | status = pipe (startup_semaphore.parent_channel); | |
1219 | if (status < 0) | |
1220 | { | |
1221 | warning ("error getting parent pipe for startup semaphore"); | |
1222 | return; | |
1223 | } | |
1224 | ||
1225 | status = pipe (startup_semaphore.child_channel); | |
1226 | if (status < 0) | |
1227 | { | |
1228 | warning ("error getting child pipe for startup semaphore"); | |
1229 | return; | |
1230 | } | |
1231 | } | |
c906108c | 1232 | \f |
c5aa993b | 1233 | |
c906108c SS |
1234 | /* Check to see if the given thread is alive. |
1235 | ||
1236 | This is a no-op, as ptrace doesn't support threads, so we just | |
1237 | return "TRUE". */ | |
1238 | ||
1239 | int | |
39f77062 | 1240 | child_thread_alive (ptid_t ptid) |
c906108c | 1241 | { |
c5aa993b | 1242 | return 1; |
c906108c SS |
1243 | } |
1244 | ||
1245 | #endif /* ! GDB_NATIVE_HPUX_11 */ |