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1 | /* Low level interface for debugging AIX 4.3+ pthreads. |
2 | ||
3 | Copyright 1999, 2000, 2002 Free Software Foundation, Inc. | |
4 | Written by Nick Duffek <nsd@redhat.com>. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | ||
24 | /* This module uses the libpthdebug.a library provided by AIX 4.3+ for | |
25 | debugging pthread applications. | |
26 | ||
27 | Some name prefix conventions: | |
28 | pthdb_ provided by libpthdebug.a | |
29 | pdc_ callbacks that this module provides to libpthdebug.a | |
30 | pd_ variables or functions interfacing with libpthdebug.a | |
31 | ||
32 | libpthdebug peculiarities: | |
33 | ||
0fe7bf7b MS |
34 | - pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but |
35 | it's not documented, and after several calls it stops working | |
36 | and causes other libpthdebug functions to fail. | |
c11d79f2 | 37 | |
0fe7bf7b MS |
38 | - pthdb_tid_pthread() doesn't always work after |
39 | pthdb_session_update(), but it does work after cycling through | |
40 | all threads using pthdb_pthread(). | |
c11d79f2 KB |
41 | |
42 | */ | |
43 | ||
44 | #include "defs.h" | |
61c5da0b | 45 | #include "gdb_assert.h" |
c11d79f2 KB |
46 | #include "gdbthread.h" |
47 | #include "target.h" | |
48 | #include "inferior.h" | |
49 | #include "regcache.h" | |
8e2c28d4 | 50 | #include "gdbcmd.h" |
27bae383 KB |
51 | #include "language.h" /* for local_hex_string() */ |
52 | #include "ppc-tdep.h" | |
c11d79f2 | 53 | |
c11d79f2 KB |
54 | #include <procinfo.h> |
55 | #include <sys/types.h> | |
56 | #include <sys/ptrace.h> | |
57 | #include <sys/reg.h> | |
c11d79f2 KB |
58 | #include <sched.h> |
59 | #include <sys/pthdebug.h> | |
60 | ||
0fe7bf7b | 61 | /* Whether to emit debugging output. */ |
8e2c28d4 | 62 | static int debug_aix_thread; |
c11d79f2 | 63 | |
0fe7bf7b | 64 | /* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */ |
c11d79f2 KB |
65 | #ifndef PTHDB_VERSION_3 |
66 | #define pthdb_tid_t tid_t | |
67 | #endif | |
68 | ||
0fe7bf7b | 69 | /* Return whether to treat PID as a debuggable thread id. */ |
c11d79f2 KB |
70 | |
71 | #define PD_TID(ptid) (pd_active && ptid_get_tid (ptid) != 0) | |
72 | ||
73 | /* Build a thread ptid. */ | |
74 | #define BUILD_THREAD(TID, PID) ptid_build (PID, 0, TID) | |
75 | ||
76 | /* Build and lwp ptid. */ | |
77 | #define BUILD_LWP(LWP, PID) MERGEPID (PID, LWP) | |
78 | ||
c11d79f2 | 79 | /* pthdb_user_t value that we pass to pthdb functions. 0 causes |
0fe7bf7b | 80 | PTHDB_BAD_USER errors, so use 1. */ |
c11d79f2 KB |
81 | |
82 | #define PD_USER 1 | |
83 | ||
0fe7bf7b | 84 | /* Success and failure values returned by pthdb callbacks. */ |
c11d79f2 KB |
85 | |
86 | #define PDC_SUCCESS PTHDB_SUCCESS | |
87 | #define PDC_FAILURE PTHDB_CALLBACK | |
88 | ||
0fe7bf7b | 89 | /* Private data attached to each element in GDB's thread list. */ |
c11d79f2 KB |
90 | |
91 | struct private_thread_info { | |
0fe7bf7b | 92 | pthdb_pthread_t pdtid; /* thread's libpthdebug id */ |
c11d79f2 KB |
93 | pthdb_tid_t tid; /* kernel thread id */ |
94 | }; | |
95 | ||
0fe7bf7b | 96 | /* Information about a thread of which libpthdebug is aware. */ |
c11d79f2 KB |
97 | |
98 | struct pd_thread { | |
99 | pthdb_pthread_t pdtid; | |
100 | pthread_t pthid; | |
101 | pthdb_tid_t tid; | |
102 | }; | |
103 | ||
0fe7bf7b | 104 | /* This module's target-specific operations, active while pd_able is true. */ |
c11d79f2 | 105 | |
206d3d3c | 106 | static struct target_ops aix_thread_ops; |
c11d79f2 | 107 | |
0fe7bf7b MS |
108 | /* Copy of the target over which ops is pushed. |
109 | This is more convenient than a pointer to child_ops or core_ops, | |
110 | because they lack current_target's default callbacks. */ | |
c11d79f2 | 111 | |
206d3d3c | 112 | static struct target_ops base_target; |
c11d79f2 | 113 | |
0fe7bf7b MS |
114 | /* Address of the function that libpthread will call when libpthdebug |
115 | is ready to be initialized. */ | |
c11d79f2 KB |
116 | |
117 | static CORE_ADDR pd_brk_addr; | |
118 | ||
0fe7bf7b | 119 | /* Whether the current application is debuggable by pthdb. */ |
c11d79f2 KB |
120 | |
121 | static int pd_able = 0; | |
122 | ||
0fe7bf7b | 123 | /* Whether a threaded application is being debugged. */ |
c11d79f2 KB |
124 | |
125 | static int pd_active = 0; | |
126 | ||
0fe7bf7b MS |
127 | /* Whether the current architecture is 64-bit. |
128 | Only valid when pd_able is true. */ | |
c11d79f2 KB |
129 | |
130 | static int arch64; | |
131 | ||
0fe7bf7b | 132 | /* Saved pointer to previous owner of target_new_objfile_hook. */ |
c11d79f2 KB |
133 | |
134 | static void (*target_new_objfile_chain)(struct objfile *); | |
135 | ||
0fe7bf7b | 136 | /* Forward declarations for pthdb callbacks. */ |
c11d79f2 KB |
137 | |
138 | static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int); | |
139 | static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t); | |
140 | static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t); | |
141 | static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid, | |
0fe7bf7b MS |
142 | unsigned long long flags, |
143 | pthdb_context_t *context); | |
c11d79f2 | 144 | static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid, |
0fe7bf7b MS |
145 | unsigned long long flags, |
146 | pthdb_context_t *context); | |
c11d79f2 KB |
147 | static int pdc_alloc (pthdb_user_t, size_t, void **); |
148 | static int pdc_realloc (pthdb_user_t, void *, size_t, void **); | |
149 | static int pdc_dealloc (pthdb_user_t, void *); | |
150 | ||
0fe7bf7b | 151 | /* pthdb callbacks. */ |
c11d79f2 KB |
152 | |
153 | static pthdb_callbacks_t pd_callbacks = { | |
154 | pdc_symbol_addrs, | |
155 | pdc_read_data, | |
156 | pdc_write_data, | |
157 | pdc_read_regs, | |
158 | pdc_write_regs, | |
159 | pdc_alloc, | |
160 | pdc_realloc, | |
161 | pdc_dealloc, | |
162 | NULL | |
163 | }; | |
164 | ||
0fe7bf7b | 165 | /* Current pthdb session. */ |
c11d79f2 KB |
166 | |
167 | static pthdb_session_t pd_session; | |
168 | ||
0fe7bf7b MS |
169 | /* Return a printable representation of pthdebug function return |
170 | STATUS. */ | |
c11d79f2 KB |
171 | |
172 | static char * | |
173 | pd_status2str (int status) | |
174 | { | |
175 | switch (status) | |
176 | { | |
177 | case PTHDB_SUCCESS: return "SUCCESS"; | |
178 | case PTHDB_NOSYS: return "NOSYS"; | |
179 | case PTHDB_NOTSUP: return "NOTSUP"; | |
180 | case PTHDB_BAD_VERSION: return "BAD_VERSION"; | |
181 | case PTHDB_BAD_USER: return "BAD_USER"; | |
182 | case PTHDB_BAD_SESSION: return "BAD_SESSION"; | |
183 | case PTHDB_BAD_MODE: return "BAD_MODE"; | |
184 | case PTHDB_BAD_FLAGS: return "BAD_FLAGS"; | |
185 | case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK"; | |
186 | case PTHDB_BAD_POINTER: return "BAD_POINTER"; | |
187 | case PTHDB_BAD_CMD: return "BAD_CMD"; | |
188 | case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD"; | |
189 | case PTHDB_BAD_ATTR: return "BAD_ATTR"; | |
190 | case PTHDB_BAD_MUTEX: return "BAD_MUTEX"; | |
191 | case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR"; | |
192 | case PTHDB_BAD_COND: return "BAD_COND"; | |
193 | case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR"; | |
194 | case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK"; | |
195 | case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR"; | |
196 | case PTHDB_BAD_KEY: return "BAD_KEY"; | |
197 | case PTHDB_BAD_PTID: return "BAD_PTID"; | |
198 | case PTHDB_BAD_TID: return "BAD_TID"; | |
199 | case PTHDB_CALLBACK: return "CALLBACK"; | |
200 | case PTHDB_CONTEXT: return "CONTEXT"; | |
201 | case PTHDB_HELD: return "HELD"; | |
202 | case PTHDB_NOT_HELD: return "NOT_HELD"; | |
203 | case PTHDB_MEMORY: return "MEMORY"; | |
204 | case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED"; | |
205 | case PTHDB_SYMBOL: return "SYMBOL"; | |
206 | case PTHDB_NOT_AVAIL: return "NOT_AVAIL"; | |
207 | case PTHDB_INTERNAL: return "INTERNAL"; | |
208 | default: return "UNKNOWN"; | |
209 | } | |
210 | } | |
211 | ||
0fe7bf7b MS |
212 | /* A call to ptrace(REQ, ID, ...) just returned RET. Check for |
213 | exceptional conditions and either return nonlocally or else return | |
214 | 1 for success and 0 for failure. */ | |
c11d79f2 KB |
215 | |
216 | static int | |
217 | ptrace_check (int req, int id, int ret) | |
218 | { | |
219 | if (ret == 0 && !errno) | |
220 | return 1; | |
221 | ||
0fe7bf7b MS |
222 | /* According to ptrace(2), ptrace may fail with EPERM if "the |
223 | Identifier parameter corresponds to a kernel thread which is | |
224 | stopped in kernel mode and whose computational state cannot be | |
225 | read or written." This happens quite often with register reads. */ | |
c11d79f2 KB |
226 | |
227 | switch (req) | |
228 | { | |
229 | case PTT_READ_GPRS: | |
230 | case PTT_READ_FPRS: | |
231 | case PTT_READ_SPRS: | |
232 | if (ret == -1 && errno == EPERM) | |
42cc437f KB |
233 | { |
234 | if (debug_aix_thread) | |
0fe7bf7b | 235 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 236 | "ptrace (%d, %d) = %d (errno = %d)\n", |
42cc437f KB |
237 | req, id, ret, errno); |
238 | return ret == -1 ? 0 : 1; | |
239 | } | |
c11d79f2 KB |
240 | break; |
241 | } | |
242 | error ("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)", | |
be006b8b | 243 | req, id, ret, errno, safe_strerror (errno)); |
0fe7bf7b | 244 | return 0; /* Not reached. */ |
c11d79f2 KB |
245 | } |
246 | ||
0fe7bf7b | 247 | /* Call ptracex (REQ, ID, ADDR, DATA, BUF). Return success. */ |
c11d79f2 KB |
248 | |
249 | static int | |
250 | ptrace64aix (int req, int id, long long addr, int data, int *buf) | |
251 | { | |
252 | errno = 0; | |
253 | return ptrace_check (req, id, ptracex (req, id, addr, data, buf)); | |
254 | } | |
255 | ||
0fe7bf7b | 256 | /* Call ptrace (REQ, ID, ADDR, DATA, BUF). Return success. */ |
c11d79f2 KB |
257 | |
258 | static int | |
259 | ptrace32 (int req, int id, int *addr, int data, int *buf) | |
260 | { | |
261 | errno = 0; | |
0fe7bf7b | 262 | return ptrace_check (req, id, |
206d3d3c | 263 | ptrace (req, id, (int *) addr, data, buf)); |
c11d79f2 KB |
264 | } |
265 | ||
0fe7bf7b MS |
266 | /* If *PIDP is a composite process/thread id, convert it to a |
267 | process id. */ | |
c11d79f2 KB |
268 | |
269 | static void | |
270 | pid_to_prc (ptid_t *ptidp) | |
271 | { | |
272 | ptid_t ptid; | |
273 | ||
274 | ptid = *ptidp; | |
275 | if (PD_TID (ptid)) | |
276 | *ptidp = pid_to_ptid (PIDGET (ptid)); | |
277 | } | |
278 | ||
0fe7bf7b MS |
279 | /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to |
280 | the address of SYMBOLS[<i>].name. */ | |
c11d79f2 KB |
281 | |
282 | static int | |
283 | pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) | |
284 | { | |
285 | struct minimal_symbol *ms; | |
286 | int i; | |
287 | char *name; | |
288 | ||
8e2c28d4 KB |
289 | if (debug_aix_thread) |
290 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 | 291 | "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n", |
8e2c28d4 | 292 | user, (long) symbols, count); |
c11d79f2 KB |
293 | |
294 | for (i = 0; i < count; i++) | |
295 | { | |
296 | name = symbols[i].name; | |
8e2c28d4 | 297 | if (debug_aix_thread) |
0fe7bf7b | 298 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 299 | " symbols[%d].name = \"%s\"\n", i, name); |
c11d79f2 KB |
300 | |
301 | if (!*name) | |
302 | symbols[i].addr = 0; | |
303 | else | |
304 | { | |
305 | if (!(ms = lookup_minimal_symbol (name, NULL, NULL))) | |
306 | { | |
8e2c28d4 | 307 | if (debug_aix_thread) |
27bae383 | 308 | fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n"); |
c11d79f2 KB |
309 | return PDC_FAILURE; |
310 | } | |
311 | symbols[i].addr = SYMBOL_VALUE_ADDRESS (ms); | |
312 | } | |
8e2c28d4 | 313 | if (debug_aix_thread) |
27bae383 KB |
314 | fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = %s\n", |
315 | i, local_hex_string (symbols[i].addr)); | |
c11d79f2 | 316 | } |
8e2c28d4 | 317 | if (debug_aix_thread) |
27bae383 | 318 | fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n"); |
c11d79f2 KB |
319 | return PDC_SUCCESS; |
320 | } | |
321 | ||
0fe7bf7b MS |
322 | /* Read registers call back function should be able to read the |
323 | context information of a debuggee kernel thread from an active | |
324 | process or from a core file. The information should be formatted | |
325 | in context64 form for both 32-bit and 64-bit process. | |
326 | If successful return 0, else non-zero is returned. */ | |
327 | ||
c11d79f2 KB |
328 | static int |
329 | pdc_read_regs (pthdb_user_t user, | |
330 | pthdb_tid_t tid, | |
331 | unsigned long long flags, | |
332 | pthdb_context_t *context) | |
333 | { | |
0fe7bf7b MS |
334 | /* This function doesn't appear to be used, so we could probably |
335 | just return 0 here. HOWEVER, if it is not defined, the OS will | |
336 | complain and several thread debug functions will fail. In case | |
337 | this is needed, I have implemented what I think it should do, | |
338 | however this code is untested. */ | |
339 | ||
c11d79f2 KB |
340 | uint64_t gprs64[32]; |
341 | uint32_t gprs32[32]; | |
342 | double fprs[32]; | |
343 | struct ptxsprs sprs64; | |
344 | struct ptsprs sprs32; | |
345 | ||
8e2c28d4 | 346 | if (debug_aix_thread) |
27bae383 KB |
347 | fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n", |
348 | (int) tid, local_hex_string (flags)); | |
c11d79f2 | 349 | |
0fe7bf7b | 350 | /* General-purpose registers. */ |
c11d79f2 KB |
351 | if (flags & PTHDB_FLAG_GPRS) |
352 | { | |
353 | if (arch64) | |
354 | { | |
0fe7bf7b MS |
355 | if (!ptrace64aix (PTT_READ_GPRS, tid, |
356 | (unsigned long) gprs64, 0, NULL)) | |
c11d79f2 KB |
357 | memset (gprs64, 0, sizeof (gprs64)); |
358 | memcpy (context->gpr, gprs64, sizeof(gprs64)); | |
359 | } | |
360 | else | |
361 | { | |
362 | if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) | |
363 | memset (gprs32, 0, sizeof (gprs32)); | |
364 | memcpy (context->gpr, gprs32, sizeof(gprs32)); | |
365 | } | |
366 | } | |
367 | ||
0fe7bf7b | 368 | /* Floating-point registers. */ |
c11d79f2 KB |
369 | if (flags & PTHDB_FLAG_FPRS) |
370 | { | |
371 | if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) | |
372 | memset (fprs, 0, sizeof (fprs)); | |
373 | memcpy (context->fpr, fprs, sizeof(fprs)); | |
374 | } | |
375 | ||
0fe7bf7b | 376 | /* Special-purpose registers. */ |
c11d79f2 KB |
377 | if (flags & PTHDB_FLAG_SPRS) |
378 | { | |
379 | if (arch64) | |
380 | { | |
0fe7bf7b MS |
381 | if (!ptrace64aix (PTT_READ_SPRS, tid, |
382 | (unsigned long) &sprs64, 0, NULL)) | |
c11d79f2 KB |
383 | memset (&sprs64, 0, sizeof (sprs64)); |
384 | memcpy (&context->msr, &sprs64, sizeof(sprs64)); | |
385 | } | |
386 | else | |
387 | { | |
388 | if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) | |
389 | memset (&sprs32, 0, sizeof (sprs32)); | |
390 | memcpy (&context->msr, &sprs32, sizeof(sprs32)); | |
391 | } | |
392 | } | |
393 | return 0; | |
394 | } | |
395 | ||
0fe7bf7b MS |
396 | /* Write register function should be able to write requested context |
397 | information to specified debuggee's kernel thread id. | |
398 | If successful return 0, else non-zero is returned. */ | |
399 | ||
c11d79f2 KB |
400 | static int |
401 | pdc_write_regs (pthdb_user_t user, | |
402 | pthdb_tid_t tid, | |
403 | unsigned long long flags, | |
404 | pthdb_context_t *context) | |
405 | { | |
0fe7bf7b MS |
406 | /* This function doesn't appear to be used, so we could probably |
407 | just return 0 here. HOWEVER, if it is not defined, the OS will | |
408 | complain and several thread debug functions will fail. In case | |
409 | this is needed, I have implemented what I think it should do, | |
410 | however this code is untested. */ | |
c11d79f2 | 411 | |
8e2c28d4 | 412 | if (debug_aix_thread) |
27bae383 KB |
413 | fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n", |
414 | (int) tid, local_hex_string (flags)); | |
c11d79f2 | 415 | |
0fe7bf7b | 416 | /* General-purpose registers. */ |
c11d79f2 KB |
417 | if (flags & PTHDB_FLAG_GPRS) |
418 | { | |
419 | if (arch64) | |
0fe7bf7b | 420 | ptrace64aix (PTT_WRITE_GPRS, tid, |
206d3d3c | 421 | (unsigned long) context->gpr, 0, NULL); |
c11d79f2 | 422 | else |
206d3d3c | 423 | ptrace32 (PTT_WRITE_GPRS, tid, (int *) context->gpr, 0, NULL); |
c11d79f2 KB |
424 | } |
425 | ||
0fe7bf7b | 426 | /* Floating-point registers. */ |
c11d79f2 KB |
427 | if (flags & PTHDB_FLAG_FPRS) |
428 | { | |
206d3d3c | 429 | ptrace32 (PTT_WRITE_FPRS, tid, (int *) context->fpr, 0, NULL); |
c11d79f2 KB |
430 | } |
431 | ||
0fe7bf7b | 432 | /* Special-purpose registers. */ |
c11d79f2 KB |
433 | if (flags & PTHDB_FLAG_SPRS) |
434 | { | |
435 | if (arch64) | |
436 | { | |
0fe7bf7b MS |
437 | ptrace64aix (PTT_WRITE_SPRS, tid, |
438 | (unsigned long) &context->msr, 0, NULL); | |
c11d79f2 KB |
439 | } |
440 | else | |
441 | { | |
206d3d3c | 442 | ptrace32 (PTT_WRITE_SPRS, tid, (int *) &context->msr, 0, NULL); |
c11d79f2 KB |
443 | } |
444 | } | |
445 | return 0; | |
446 | } | |
447 | ||
0fe7bf7b | 448 | /* pthdb callback: read LEN bytes from process ADDR into BUF. */ |
c11d79f2 KB |
449 | |
450 | static int | |
0fe7bf7b MS |
451 | pdc_read_data (pthdb_user_t user, void *buf, |
452 | pthdb_addr_t addr, size_t len) | |
c11d79f2 KB |
453 | { |
454 | int status, ret; | |
455 | ||
8e2c28d4 KB |
456 | if (debug_aix_thread) |
457 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 KB |
458 | "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
459 | user, (long) buf, local_hex_string (addr), len); | |
c11d79f2 KB |
460 | |
461 | status = target_read_memory (addr, buf, len); | |
462 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; | |
463 | ||
8e2c28d4 | 464 | if (debug_aix_thread) |
27bae383 | 465 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", |
0fe7bf7b | 466 | status, pd_status2str (ret)); |
c11d79f2 KB |
467 | return ret; |
468 | } | |
469 | ||
0fe7bf7b | 470 | /* pthdb callback: write LEN bytes from BUF to process ADDR. */ |
c11d79f2 KB |
471 | |
472 | static int | |
0fe7bf7b MS |
473 | pdc_write_data (pthdb_user_t user, void *buf, |
474 | pthdb_addr_t addr, size_t len) | |
c11d79f2 KB |
475 | { |
476 | int status, ret; | |
477 | ||
8e2c28d4 KB |
478 | if (debug_aix_thread) |
479 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 KB |
480 | "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
481 | user, (long) buf, local_hex_string (addr), len); | |
c11d79f2 KB |
482 | |
483 | status = target_write_memory (addr, buf, len); | |
484 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; | |
485 | ||
8e2c28d4 | 486 | if (debug_aix_thread) |
27bae383 | 487 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", status, |
8e2c28d4 | 488 | pd_status2str (ret)); |
c11d79f2 KB |
489 | return ret; |
490 | } | |
491 | ||
0fe7bf7b MS |
492 | /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it |
493 | in BUFP. */ | |
c11d79f2 KB |
494 | |
495 | static int | |
496 | pdc_alloc (pthdb_user_t user, size_t len, void **bufp) | |
497 | { | |
8e2c28d4 KB |
498 | if (debug_aix_thread) |
499 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 | 500 | "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n", |
8e2c28d4 | 501 | user, len, (long) bufp); |
c11d79f2 | 502 | *bufp = xmalloc (len); |
8e2c28d4 | 503 | if (debug_aix_thread) |
0fe7bf7b | 504 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 505 | " malloc returned 0x%lx\n", (long) *bufp); |
0fe7bf7b MS |
506 | |
507 | /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never | |
508 | be returned. */ | |
509 | ||
c11d79f2 KB |
510 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
511 | } | |
512 | ||
0fe7bf7b MS |
513 | /* pthdb callback: reallocate BUF, which was allocated by the alloc or |
514 | realloc callback, so that it contains LEN bytes, and store a | |
515 | pointer to the result in BUFP. */ | |
c11d79f2 KB |
516 | |
517 | static int | |
518 | pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp) | |
519 | { | |
8e2c28d4 KB |
520 | if (debug_aix_thread) |
521 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 | 522 | "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n", |
8e2c28d4 | 523 | user, (long) buf, len, (long) bufp); |
be006b8b | 524 | *bufp = xrealloc (buf, len); |
8e2c28d4 | 525 | if (debug_aix_thread) |
0fe7bf7b | 526 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 527 | " realloc returned 0x%lx\n", (long) *bufp); |
c11d79f2 KB |
528 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
529 | } | |
530 | ||
0fe7bf7b MS |
531 | /* pthdb callback: free BUF, which was allocated by the alloc or |
532 | realloc callback. */ | |
c11d79f2 KB |
533 | |
534 | static int | |
535 | pdc_dealloc (pthdb_user_t user, void *buf) | |
536 | { | |
8e2c28d4 | 537 | if (debug_aix_thread) |
0fe7bf7b | 538 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 539 | "pdc_free (user = %ld, buf = 0x%lx)\n", user, |
8e2c28d4 | 540 | (long) buf); |
c11d79f2 KB |
541 | xfree (buf); |
542 | return PDC_SUCCESS; | |
543 | } | |
544 | ||
0fe7bf7b | 545 | /* Return a printable representation of pthread STATE. */ |
c11d79f2 KB |
546 | |
547 | static char * | |
548 | state2str (pthdb_state_t state) | |
549 | { | |
550 | switch (state) | |
551 | { | |
552 | case PST_IDLE: return "idle"; /* being created */ | |
553 | case PST_RUN: return "running"; /* running */ | |
554 | case PST_SLEEP: return "sleeping"; /* awaiting an event */ | |
555 | case PST_READY: return "ready"; /* runnable */ | |
556 | case PST_TERM: return "finished"; /* awaiting a join/detach */ | |
557 | default: return "unknown"; | |
558 | } | |
559 | } | |
560 | ||
0fe7bf7b | 561 | /* qsort() comparison function for sorting pd_thread structs by pthid. */ |
c11d79f2 KB |
562 | |
563 | static int | |
564 | pcmp (const void *p1v, const void *p2v) | |
565 | { | |
566 | struct pd_thread *p1 = (struct pd_thread *) p1v; | |
567 | struct pd_thread *p2 = (struct pd_thread *) p2v; | |
568 | return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid; | |
569 | } | |
570 | ||
0fe7bf7b | 571 | /* iterate_over_threads() callback for counting GDB threads. */ |
c11d79f2 KB |
572 | |
573 | static int | |
574 | giter_count (struct thread_info *thread, void *countp) | |
575 | { | |
576 | (*(int *) countp)++; | |
577 | return 0; | |
578 | } | |
579 | ||
0fe7bf7b | 580 | /* iterate_over_threads() callback for accumulating GDB thread pids. */ |
c11d79f2 KB |
581 | |
582 | static int | |
583 | giter_accum (struct thread_info *thread, void *bufp) | |
584 | { | |
585 | **(struct thread_info ***) bufp = thread; | |
586 | (*(struct thread_info ***) bufp)++; | |
587 | return 0; | |
588 | } | |
589 | ||
590 | /* ptid comparison function */ | |
0fe7bf7b | 591 | |
c11d79f2 KB |
592 | static int |
593 | ptid_cmp (ptid_t ptid1, ptid_t ptid2) | |
594 | { | |
595 | int pid1, pid2; | |
596 | ||
597 | if (ptid_get_pid (ptid1) < ptid_get_pid (ptid2)) | |
598 | return -1; | |
599 | else if (ptid_get_pid (ptid1) > ptid_get_pid (ptid2)) | |
600 | return 1; | |
601 | else if (ptid_get_tid (ptid1) < ptid_get_tid (ptid2)) | |
602 | return -1; | |
603 | else if (ptid_get_tid (ptid1) > ptid_get_tid (ptid2)) | |
604 | return 1; | |
605 | else if (ptid_get_lwp (ptid1) < ptid_get_lwp (ptid2)) | |
606 | return -1; | |
607 | else if (ptid_get_lwp (ptid1) > ptid_get_lwp (ptid2)) | |
608 | return 1; | |
609 | else | |
610 | return 0; | |
611 | } | |
612 | ||
0fe7bf7b | 613 | /* qsort() comparison function for sorting thread_info structs by pid. */ |
c11d79f2 KB |
614 | |
615 | static int | |
616 | gcmp (const void *t1v, const void *t2v) | |
617 | { | |
618 | struct thread_info *t1 = *(struct thread_info **) t1v; | |
619 | struct thread_info *t2 = *(struct thread_info **) t2v; | |
620 | return ptid_cmp (t1->ptid, t2->ptid); | |
621 | } | |
622 | ||
623 | /* Synchronize GDB's thread list with libpthdebug's. | |
624 | ||
625 | There are some benefits of doing this every time the inferior stops: | |
626 | ||
0fe7bf7b MS |
627 | - allows users to run thread-specific commands without needing to |
628 | run "info threads" first | |
c11d79f2 KB |
629 | |
630 | - helps pthdb_tid_pthread() work properly (see "libpthdebug | |
631 | peculiarities" at the top of this module) | |
632 | ||
0fe7bf7b MS |
633 | - simplifies the demands placed on libpthdebug, which seems to |
634 | have difficulty with certain call patterns */ | |
c11d79f2 KB |
635 | |
636 | static void | |
637 | sync_threadlists (void) | |
638 | { | |
639 | int cmd, status, infpid; | |
640 | int pcount, psize, pi, gcount, gi; | |
641 | struct pd_thread *pbuf; | |
642 | struct thread_info **gbuf, **g, *thread; | |
643 | pthdb_pthread_t pdtid; | |
644 | pthread_t pthid; | |
645 | pthdb_tid_t tid; | |
c11d79f2 | 646 | |
0fe7bf7b | 647 | /* Accumulate an array of libpthdebug threads sorted by pthread id. */ |
c11d79f2 KB |
648 | |
649 | pcount = 0; | |
650 | psize = 1; | |
651 | pbuf = (struct pd_thread *) xmalloc (psize * sizeof *pbuf); | |
652 | ||
653 | for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT) | |
654 | { | |
655 | status = pthdb_pthread (pd_session, &pdtid, cmd); | |
656 | if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD) | |
657 | break; | |
658 | ||
659 | status = pthdb_pthread_ptid (pd_session, pdtid, &pthid); | |
660 | if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID) | |
661 | continue; | |
662 | ||
663 | if (pcount == psize) | |
664 | { | |
665 | psize *= 2; | |
0fe7bf7b MS |
666 | pbuf = (struct pd_thread *) xrealloc (pbuf, |
667 | psize * sizeof *pbuf); | |
c11d79f2 KB |
668 | } |
669 | pbuf[pcount].pdtid = pdtid; | |
670 | pbuf[pcount].pthid = pthid; | |
671 | pcount++; | |
672 | } | |
673 | ||
674 | for (pi = 0; pi < pcount; pi++) | |
675 | { | |
676 | status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid); | |
677 | if (status != PTHDB_SUCCESS) | |
678 | tid = PTHDB_INVALID_TID; | |
679 | pbuf[pi].tid = tid; | |
680 | } | |
681 | ||
682 | qsort (pbuf, pcount, sizeof *pbuf, pcmp); | |
683 | ||
0fe7bf7b | 684 | /* Accumulate an array of GDB threads sorted by pid. */ |
c11d79f2 KB |
685 | |
686 | gcount = 0; | |
687 | iterate_over_threads (giter_count, &gcount); | |
688 | g = gbuf = (struct thread_info **) xmalloc (gcount * sizeof *gbuf); | |
689 | iterate_over_threads (giter_accum, &g); | |
690 | qsort (gbuf, gcount, sizeof *gbuf, gcmp); | |
691 | ||
0fe7bf7b | 692 | /* Apply differences between the two arrays to GDB's thread list. */ |
c11d79f2 KB |
693 | |
694 | infpid = PIDGET (inferior_ptid); | |
695 | for (pi = gi = 0; pi < pcount || gi < gcount;) | |
696 | { | |
c11d79f2 | 697 | if (pi == pcount) |
c11d79f2 | 698 | { |
42cc437f | 699 | delete_thread (gbuf[gi]->ptid); |
c11d79f2 KB |
700 | gi++; |
701 | } | |
42cc437f | 702 | else if (gi == gcount) |
c11d79f2 | 703 | { |
42cc437f | 704 | thread = add_thread (BUILD_THREAD (pbuf[pi].pthid, infpid)); |
c11d79f2 | 705 | thread->private = xmalloc (sizeof (struct private_thread_info)); |
42cc437f KB |
706 | thread->private->pdtid = pbuf[pi].pdtid; |
707 | thread->private->tid = pbuf[pi].tid; | |
c11d79f2 KB |
708 | pi++; |
709 | } | |
42cc437f KB |
710 | else |
711 | { | |
712 | ptid_t pptid, gptid; | |
713 | int cmp_result; | |
714 | ||
715 | pptid = BUILD_THREAD (pbuf[pi].pthid, infpid); | |
716 | gptid = gbuf[gi]->ptid; | |
717 | pdtid = pbuf[pi].pdtid; | |
718 | tid = pbuf[pi].tid; | |
c11d79f2 | 719 | |
42cc437f KB |
720 | cmp_result = ptid_cmp (pptid, gptid); |
721 | ||
722 | if (cmp_result == 0) | |
723 | { | |
724 | gbuf[gi]->private->pdtid = pdtid; | |
725 | gbuf[gi]->private->tid = tid; | |
726 | pi++; | |
727 | gi++; | |
728 | } | |
729 | else if (cmp_result > 0) | |
730 | { | |
731 | delete_thread (gptid); | |
732 | gi++; | |
733 | } | |
734 | else | |
735 | { | |
736 | thread = add_thread (pptid); | |
737 | thread->private = xmalloc (sizeof (struct private_thread_info)); | |
738 | thread->private->pdtid = pdtid; | |
739 | thread->private->tid = tid; | |
740 | pi++; | |
741 | } | |
742 | } | |
c11d79f2 KB |
743 | } |
744 | ||
745 | xfree (pbuf); | |
746 | xfree (gbuf); | |
747 | } | |
748 | ||
0fe7bf7b MS |
749 | /* Iterate_over_threads() callback for locating a thread whose kernel |
750 | thread just received a trap signal. */ | |
c11d79f2 KB |
751 | |
752 | static int | |
753 | iter_trap (struct thread_info *thread, void *unused) | |
754 | { | |
755 | struct thrdsinfo64 thrinf; | |
756 | pthdb_tid_t tid; | |
757 | ||
0fe7bf7b MS |
758 | /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */ |
759 | extern int getthrds (pid_t, struct thrdsinfo64 *, | |
760 | int, pthdb_tid_t *, int); | |
c11d79f2 KB |
761 | |
762 | tid = thread->private->tid; | |
763 | if (tid == PTHDB_INVALID_TID) | |
764 | return 0; | |
765 | ||
0fe7bf7b MS |
766 | if (getthrds (PIDGET (inferior_ptid), &thrinf, |
767 | sizeof (thrinf), &tid, 1) != 1) | |
c11d79f2 KB |
768 | return 0; |
769 | ||
770 | return thrinf.ti_cursig == SIGTRAP; | |
771 | } | |
772 | ||
0fe7bf7b MS |
773 | /* Synchronize libpthdebug's state with the inferior and with GDB, |
774 | generate a composite process/thread <pid> for the current thread, | |
775 | set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */ | |
c11d79f2 KB |
776 | |
777 | static ptid_t | |
778 | pd_update (int set_infpid) | |
779 | { | |
780 | int status; | |
781 | ptid_t ptid; | |
782 | struct thread_info *thread; | |
783 | ||
784 | if (!pd_active) | |
785 | return inferior_ptid; | |
786 | ||
787 | status = pthdb_session_update (pd_session); | |
788 | if (status != PTHDB_SUCCESS) | |
789 | return inferior_ptid; | |
790 | ||
791 | sync_threadlists (); | |
792 | ||
0fe7bf7b | 793 | /* Define "current thread" as one that just received a trap signal. */ |
c11d79f2 KB |
794 | |
795 | thread = iterate_over_threads (iter_trap, NULL); | |
796 | if (!thread) | |
797 | ptid = inferior_ptid; | |
798 | else | |
799 | { | |
800 | ptid = thread->ptid; | |
801 | if (set_infpid) | |
802 | inferior_ptid = ptid; | |
803 | } | |
804 | return ptid; | |
805 | } | |
806 | ||
0fe7bf7b MS |
807 | /* Try to start debugging threads in the current process. |
808 | If successful and SET_INFPID, set inferior_ptid to reflect the | |
809 | current thread. */ | |
c11d79f2 KB |
810 | |
811 | static ptid_t | |
812 | pd_activate (int set_infpid) | |
813 | { | |
814 | int status; | |
815 | ||
816 | status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT, | |
0fe7bf7b MS |
817 | PTHDB_FLAG_REGS, &pd_callbacks, |
818 | &pd_session); | |
c11d79f2 KB |
819 | if (status != PTHDB_SUCCESS) |
820 | { | |
821 | return inferior_ptid; | |
822 | } | |
823 | pd_active = 1; | |
824 | return pd_update (set_infpid); | |
825 | } | |
826 | ||
0fe7bf7b | 827 | /* Undo the effects of pd_activate(). */ |
c11d79f2 KB |
828 | |
829 | static void | |
830 | pd_deactivate (void) | |
831 | { | |
832 | if (!pd_active) | |
833 | return; | |
834 | pthdb_session_destroy (pd_session); | |
835 | ||
836 | pid_to_prc (&inferior_ptid); | |
837 | pd_active = 0; | |
838 | } | |
839 | ||
0fe7bf7b MS |
840 | /* An object file has just been loaded. Check whether the current |
841 | application is pthreaded, and if so, prepare for thread debugging. */ | |
c11d79f2 KB |
842 | |
843 | static void | |
844 | pd_enable (void) | |
845 | { | |
846 | int status; | |
847 | char *stub_name; | |
848 | struct minimal_symbol *ms; | |
849 | ||
0fe7bf7b | 850 | /* Don't initialize twice. */ |
c11d79f2 KB |
851 | if (pd_able) |
852 | return; | |
853 | ||
0fe7bf7b | 854 | /* Check application word size. */ |
12c266ea | 855 | arch64 = DEPRECATED_REGISTER_RAW_SIZE (0) == 8; |
c11d79f2 | 856 | |
0fe7bf7b | 857 | /* Check whether the application is pthreaded. */ |
c11d79f2 | 858 | stub_name = NULL; |
0fe7bf7b MS |
859 | status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS, |
860 | &pd_callbacks, &stub_name); | |
861 | if ((status != PTHDB_SUCCESS && | |
862 | status != PTHDB_NOT_PTHREADED) || !stub_name) | |
c11d79f2 KB |
863 | return; |
864 | ||
0fe7bf7b | 865 | /* Set a breakpoint on the returned stub function. */ |
c11d79f2 KB |
866 | if (!(ms = lookup_minimal_symbol (stub_name, NULL, NULL))) |
867 | return; | |
868 | pd_brk_addr = SYMBOL_VALUE_ADDRESS (ms); | |
869 | if (!create_thread_event_breakpoint (pd_brk_addr)) | |
870 | return; | |
871 | ||
0fe7bf7b | 872 | /* Prepare for thread debugging. */ |
206d3d3c KB |
873 | base_target = current_target; |
874 | push_target (&aix_thread_ops); | |
c11d79f2 KB |
875 | pd_able = 1; |
876 | ||
0fe7bf7b MS |
877 | /* If we're debugging a core file or an attached inferior, the |
878 | pthread library may already have been initialized, so try to | |
879 | activate thread debugging. */ | |
c11d79f2 KB |
880 | pd_activate (1); |
881 | } | |
882 | ||
0fe7bf7b | 883 | /* Undo the effects of pd_enable(). */ |
c11d79f2 KB |
884 | |
885 | static void | |
886 | pd_disable (void) | |
887 | { | |
888 | if (!pd_able) | |
889 | return; | |
890 | if (pd_active) | |
891 | pd_deactivate (); | |
892 | pd_able = 0; | |
206d3d3c | 893 | unpush_target (&aix_thread_ops); |
c11d79f2 KB |
894 | } |
895 | ||
896 | /* target_new_objfile_hook callback. | |
897 | ||
0fe7bf7b MS |
898 | If OBJFILE is non-null, check whether a threaded application is |
899 | being debugged, and if so, prepare for thread debugging. | |
c11d79f2 | 900 | |
0fe7bf7b | 901 | If OBJFILE is null, stop debugging threads. */ |
c11d79f2 KB |
902 | |
903 | static void | |
904 | new_objfile (struct objfile *objfile) | |
905 | { | |
906 | if (objfile) | |
907 | pd_enable (); | |
908 | else | |
909 | pd_disable (); | |
910 | ||
911 | if (target_new_objfile_chain) | |
912 | target_new_objfile_chain (objfile); | |
913 | } | |
914 | ||
0fe7bf7b | 915 | /* Attach to process specified by ARGS. */ |
c11d79f2 KB |
916 | |
917 | static void | |
206d3d3c | 918 | aix_thread_attach (char *args, int from_tty) |
c11d79f2 | 919 | { |
206d3d3c | 920 | base_target.to_attach (args, from_tty); |
c11d79f2 KB |
921 | pd_activate (1); |
922 | } | |
923 | ||
206d3d3c | 924 | /* Detach from the process attached to by aix_thread_attach(). */ |
c11d79f2 KB |
925 | |
926 | static void | |
206d3d3c | 927 | aix_thread_detach (char *args, int from_tty) |
c11d79f2 | 928 | { |
6c0c456d | 929 | pd_disable (); |
206d3d3c | 930 | base_target.to_detach (args, from_tty); |
c11d79f2 KB |
931 | } |
932 | ||
933 | /* Tell the inferior process to continue running thread PID if != -1 | |
0fe7bf7b | 934 | and all threads otherwise. */ |
c11d79f2 KB |
935 | |
936 | static void | |
206d3d3c | 937 | aix_thread_resume (ptid_t ptid, int step, enum target_signal sig) |
c11d79f2 KB |
938 | { |
939 | struct thread_info *thread; | |
940 | pthdb_tid_t tid[2]; | |
941 | ||
942 | if (!PD_TID (ptid)) | |
14fa3751 KB |
943 | { |
944 | struct cleanup *cleanup = save_inferior_ptid (); | |
945 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
206d3d3c | 946 | base_target.to_resume (ptid, step, sig); |
14fa3751 KB |
947 | do_cleanups (cleanup); |
948 | } | |
c11d79f2 KB |
949 | else |
950 | { | |
951 | thread = find_thread_pid (ptid); | |
952 | if (!thread) | |
0fe7bf7b MS |
953 | error ("aix-thread resume: unknown pthread %ld", |
954 | TIDGET (ptid)); | |
c11d79f2 KB |
955 | |
956 | tid[0] = thread->private->tid; | |
957 | if (tid[0] == PTHDB_INVALID_TID) | |
0fe7bf7b MS |
958 | error ("aix-thread resume: no tid for pthread %ld", |
959 | TIDGET (ptid)); | |
c11d79f2 KB |
960 | tid[1] = 0; |
961 | ||
962 | if (arch64) | |
0fe7bf7b | 963 | ptrace64aix (PTT_CONTINUE, tid[0], 1, |
206d3d3c | 964 | target_signal_to_host (sig), (int *) tid); |
c11d79f2 KB |
965 | else |
966 | ptrace32 (PTT_CONTINUE, tid[0], (int *) 1, | |
206d3d3c | 967 | target_signal_to_host (sig), (int *) tid); |
c11d79f2 KB |
968 | } |
969 | } | |
970 | ||
0fe7bf7b MS |
971 | /* Wait for thread/process ID if != -1 or for any thread otherwise. |
972 | If an error occurs, return -1, else return the pid of the stopped | |
973 | thread. */ | |
c11d79f2 KB |
974 | |
975 | static ptid_t | |
206d3d3c | 976 | aix_thread_wait (ptid_t ptid, struct target_waitstatus *status) |
c11d79f2 | 977 | { |
14fa3751 KB |
978 | struct cleanup *cleanup = save_inferior_ptid (); |
979 | ||
c11d79f2 | 980 | pid_to_prc (&ptid); |
14fa3751 KB |
981 | |
982 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
206d3d3c | 983 | ptid = base_target.to_wait (ptid, status); |
14fa3751 KB |
984 | do_cleanups (cleanup); |
985 | ||
c11d79f2 KB |
986 | if (PIDGET (ptid) == -1) |
987 | return pid_to_ptid (-1); | |
988 | ||
0fe7bf7b | 989 | /* Check whether libpthdebug might be ready to be initialized. */ |
c11d79f2 KB |
990 | if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED && |
991 | status->value.sig == TARGET_SIGNAL_TRAP && | |
992 | read_pc_pid (ptid) - DECR_PC_AFTER_BREAK == pd_brk_addr) | |
993 | return pd_activate (0); | |
994 | ||
995 | return pd_update (0); | |
996 | } | |
997 | ||
0fe7bf7b | 998 | /* Record that the 64-bit general-purpose registers contain VALS. */ |
c11d79f2 KB |
999 | |
1000 | static void | |
1001 | supply_gprs64 (uint64_t *vals) | |
1002 | { | |
1003 | int regno; | |
1004 | ||
1005 | for (regno = 0; regno < 32; regno++) | |
1006 | supply_register (regno, (char *) (vals + regno)); | |
1007 | } | |
1008 | ||
0fe7bf7b | 1009 | /* Record that 32-bit register REGNO contains VAL. */ |
c11d79f2 KB |
1010 | |
1011 | static void | |
1012 | supply_reg32 (int regno, uint32_t val) | |
1013 | { | |
1014 | supply_register (regno, (char *) &val); | |
1015 | } | |
1016 | ||
0fe7bf7b | 1017 | /* Record that the floating-point registers contain VALS. */ |
c11d79f2 KB |
1018 | |
1019 | static void | |
1020 | supply_fprs (double *vals) | |
1021 | { | |
1022 | int regno; | |
1023 | ||
1024 | for (regno = 0; regno < 32; regno++) | |
1025 | supply_register (regno + FP0_REGNUM, (char *) (vals + regno)); | |
1026 | } | |
1027 | ||
f1a91342 KB |
1028 | /* Predicate to test whether given register number is a "special" register. */ |
1029 | static int | |
1030 | special_register_p (int regno) | |
1031 | { | |
1032 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
1033 | ||
1034 | return regno == PC_REGNUM | |
1035 | || regno == tdep->ppc_ps_regnum | |
1036 | || regno == tdep->ppc_cr_regnum | |
1037 | || regno == tdep->ppc_lr_regnum | |
1038 | || regno == tdep->ppc_ctr_regnum | |
1039 | || regno == tdep->ppc_xer_regnum | |
0e061eef | 1040 | || regno == tdep->ppc_fpscr_regnum |
f1a91342 KB |
1041 | || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum); |
1042 | } | |
1043 | ||
1044 | ||
0fe7bf7b MS |
1045 | /* Record that the special registers contain the specified 64-bit and |
1046 | 32-bit values. */ | |
c11d79f2 KB |
1047 | |
1048 | static void | |
1049 | supply_sprs64 (uint64_t iar, uint64_t msr, uint32_t cr, | |
0e061eef KB |
1050 | uint64_t lr, uint64_t ctr, uint32_t xer, |
1051 | uint32_t fpscr) | |
c11d79f2 | 1052 | { |
f1a91342 KB |
1053 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1054 | ||
1055 | supply_register (PC_REGNUM, (char *) &iar); | |
1056 | supply_register (tdep->ppc_ps_regnum, (char *) &msr); | |
1057 | supply_register (tdep->ppc_cr_regnum, (char *) &cr); | |
1058 | supply_register (tdep->ppc_lr_regnum, (char *) &lr); | |
1059 | supply_register (tdep->ppc_ctr_regnum, (char *) &ctr); | |
1060 | supply_register (tdep->ppc_xer_regnum, (char *) &xer); | |
0e061eef | 1061 | supply_register (tdep->ppc_fpscr_regnum, (char *) &fpscr); |
c11d79f2 KB |
1062 | } |
1063 | ||
0fe7bf7b MS |
1064 | /* Record that the special registers contain the specified 32-bit |
1065 | values. */ | |
c11d79f2 KB |
1066 | |
1067 | static void | |
1068 | supply_sprs32 (uint32_t iar, uint32_t msr, uint32_t cr, | |
0e061eef KB |
1069 | uint32_t lr, uint32_t ctr, uint32_t xer, |
1070 | uint32_t fpscr) | |
c11d79f2 | 1071 | { |
f1a91342 KB |
1072 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1073 | ||
1074 | supply_register (PC_REGNUM, (char *) &iar); | |
1075 | supply_register (tdep->ppc_ps_regnum, (char *) &msr); | |
1076 | supply_register (tdep->ppc_cr_regnum, (char *) &cr); | |
1077 | supply_register (tdep->ppc_lr_regnum, (char *) &lr); | |
1078 | supply_register (tdep->ppc_ctr_regnum, (char *) &ctr); | |
1079 | supply_register (tdep->ppc_xer_regnum, (char *) &xer); | |
0e061eef | 1080 | supply_register (tdep->ppc_fpscr_regnum, (char *) &fpscr); |
c11d79f2 KB |
1081 | } |
1082 | ||
1083 | /* Fetch all registers from pthread PDTID, which doesn't have a kernel | |
1084 | thread. | |
1085 | ||
0fe7bf7b MS |
1086 | There's no way to query a single register from a non-kernel |
1087 | pthread, so there's no need for a single-register version of this | |
1088 | function. */ | |
c11d79f2 KB |
1089 | |
1090 | static void | |
206d3d3c | 1091 | fetch_regs_user_thread (pthdb_pthread_t pdtid) |
c11d79f2 KB |
1092 | { |
1093 | int status, i; | |
1094 | pthdb_context_t ctx; | |
1095 | ||
8e2c28d4 | 1096 | if (debug_aix_thread) |
206d3d3c KB |
1097 | fprintf_unfiltered (gdb_stdlog, |
1098 | "fetch_regs_user_thread %lx\n", (long) pdtid); | |
c11d79f2 KB |
1099 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
1100 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1101 | error ("aix-thread: fetch_registers: pthdb_pthread_context returned %s", |
1102 | pd_status2str (status)); | |
c11d79f2 | 1103 | |
0fe7bf7b | 1104 | /* General-purpose registers. */ |
c11d79f2 KB |
1105 | |
1106 | if (arch64) | |
1107 | supply_gprs64 (ctx.gpr); | |
1108 | else | |
1109 | for (i = 0; i < 32; i++) | |
1110 | supply_reg32 (i, ctx.gpr[i]); | |
1111 | ||
0fe7bf7b | 1112 | /* Floating-point registers. */ |
c11d79f2 KB |
1113 | |
1114 | supply_fprs (ctx.fpr); | |
1115 | ||
0fe7bf7b | 1116 | /* Special registers. */ |
c11d79f2 KB |
1117 | |
1118 | if (arch64) | |
0e061eef KB |
1119 | supply_sprs64 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer, |
1120 | ctx.fpscr); | |
c11d79f2 | 1121 | else |
0e061eef KB |
1122 | supply_sprs32 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer, |
1123 | ctx.fpscr); | |
c11d79f2 KB |
1124 | } |
1125 | ||
0fe7bf7b MS |
1126 | /* Fetch register REGNO if != -1 or all registers otherwise from |
1127 | kernel thread TID. | |
c11d79f2 | 1128 | |
0fe7bf7b MS |
1129 | AIX provides a way to query all of a kernel thread's GPRs, FPRs, or |
1130 | SPRs, but there's no way to query individual registers within those | |
1131 | groups. Therefore, if REGNO != -1, this function fetches an entire | |
1132 | group. | |
c11d79f2 | 1133 | |
0fe7bf7b MS |
1134 | Unfortunately, kernel thread register queries often fail with |
1135 | EPERM, indicating that the thread is in kernel space. This breaks | |
1136 | backtraces of threads other than the current one. To make that | |
1137 | breakage obvious without throwing an error to top level (which is | |
1138 | bad e.g. during "info threads" output), zero registers that can't | |
1139 | be retrieved. */ | |
c11d79f2 KB |
1140 | |
1141 | static void | |
206d3d3c | 1142 | fetch_regs_kernel_thread (int regno, pthdb_tid_t tid) |
c11d79f2 KB |
1143 | { |
1144 | uint64_t gprs64[32]; | |
1145 | uint32_t gprs32[32]; | |
1146 | double fprs[32]; | |
1147 | struct ptxsprs sprs64; | |
1148 | struct ptsprs sprs32; | |
1149 | int i; | |
1150 | ||
8e2c28d4 KB |
1151 | if (debug_aix_thread) |
1152 | fprintf_unfiltered (gdb_stdlog, | |
206d3d3c KB |
1153 | "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n", |
1154 | (long) tid, regno, arch64); | |
c11d79f2 | 1155 | |
0fe7bf7b | 1156 | /* General-purpose registers. */ |
c11d79f2 KB |
1157 | if (regno == -1 || regno < FP0_REGNUM) |
1158 | { | |
1159 | if (arch64) | |
1160 | { | |
0fe7bf7b MS |
1161 | if (!ptrace64aix (PTT_READ_GPRS, tid, |
1162 | (unsigned long) gprs64, 0, NULL)) | |
c11d79f2 KB |
1163 | memset (gprs64, 0, sizeof (gprs64)); |
1164 | supply_gprs64 (gprs64); | |
1165 | } | |
1166 | else | |
1167 | { | |
1168 | if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) | |
1169 | memset (gprs32, 0, sizeof (gprs32)); | |
1170 | for (i = 0; i < 32; i++) | |
1171 | supply_reg32 (i, gprs32[i]); | |
1172 | } | |
1173 | } | |
1174 | ||
0fe7bf7b | 1175 | /* Floating-point registers. */ |
c11d79f2 KB |
1176 | |
1177 | if (regno == -1 || (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)) | |
1178 | { | |
1179 | if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) | |
1180 | memset (fprs, 0, sizeof (fprs)); | |
1181 | supply_fprs (fprs); | |
1182 | } | |
1183 | ||
0fe7bf7b | 1184 | /* Special-purpose registers. */ |
c11d79f2 | 1185 | |
f1a91342 | 1186 | if (regno == -1 || special_register_p (regno)) |
c11d79f2 KB |
1187 | { |
1188 | if (arch64) | |
1189 | { | |
0fe7bf7b MS |
1190 | if (!ptrace64aix (PTT_READ_SPRS, tid, |
1191 | (unsigned long) &sprs64, 0, NULL)) | |
c11d79f2 KB |
1192 | memset (&sprs64, 0, sizeof (sprs64)); |
1193 | supply_sprs64 (sprs64.pt_iar, sprs64.pt_msr, sprs64.pt_cr, | |
0e061eef KB |
1194 | sprs64.pt_lr, sprs64.pt_ctr, sprs64.pt_xer, |
1195 | sprs64.pt_fpscr); | |
c11d79f2 KB |
1196 | } |
1197 | else | |
1198 | { | |
f1a91342 KB |
1199 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1200 | ||
c11d79f2 KB |
1201 | if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) |
1202 | memset (&sprs32, 0, sizeof (sprs32)); | |
1203 | supply_sprs32 (sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr, | |
0e061eef KB |
1204 | sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer, |
1205 | sprs32.pt_fpscr); | |
c11d79f2 | 1206 | |
f1a91342 KB |
1207 | if (tdep->ppc_mq_regnum >= 0) |
1208 | supply_register (tdep->ppc_mq_regnum, (char *) &sprs32.pt_mq); | |
c11d79f2 KB |
1209 | } |
1210 | } | |
1211 | } | |
1212 | ||
1213 | /* Fetch register REGNO if != -1 or all registers otherwise in the | |
0fe7bf7b | 1214 | thread/process specified by inferior_ptid. */ |
c11d79f2 KB |
1215 | |
1216 | static void | |
206d3d3c | 1217 | aix_thread_fetch_registers (int regno) |
c11d79f2 KB |
1218 | { |
1219 | struct thread_info *thread; | |
1220 | pthdb_tid_t tid; | |
1221 | ||
1222 | if (!PD_TID (inferior_ptid)) | |
206d3d3c | 1223 | base_target.to_fetch_registers (regno); |
c11d79f2 KB |
1224 | else |
1225 | { | |
1226 | thread = find_thread_pid (inferior_ptid); | |
1227 | tid = thread->private->tid; | |
1228 | ||
1229 | if (tid == PTHDB_INVALID_TID) | |
206d3d3c | 1230 | fetch_regs_user_thread (thread->private->pdtid); |
c11d79f2 | 1231 | else |
206d3d3c | 1232 | fetch_regs_kernel_thread (regno, tid); |
c11d79f2 KB |
1233 | } |
1234 | } | |
1235 | ||
61c5da0b KB |
1236 | /* Store the gp registers into an array of uint32_t or uint64_t. */ |
1237 | ||
1238 | static void | |
1239 | fill_gprs64 (uint64_t *vals) | |
1240 | { | |
1241 | int regno; | |
1242 | ||
1243 | for (regno = 0; regno < FP0_REGNUM; regno++) | |
cbe92db4 KB |
1244 | if (register_cached (regno)) |
1245 | regcache_collect (regno, vals + regno); | |
61c5da0b KB |
1246 | } |
1247 | ||
1248 | static void | |
1249 | fill_gprs32 (uint32_t *vals) | |
1250 | { | |
1251 | int regno; | |
1252 | ||
1253 | for (regno = 0; regno < FP0_REGNUM; regno++) | |
cbe92db4 KB |
1254 | if (register_cached (regno)) |
1255 | regcache_collect (regno, vals + regno); | |
61c5da0b KB |
1256 | } |
1257 | ||
1258 | /* Store the floating point registers into a double array. */ | |
1259 | static void | |
1260 | fill_fprs (double *vals) | |
1261 | { | |
1262 | int regno; | |
1263 | ||
1264 | for (regno = FP0_REGNUM; regno < FPLAST_REGNUM; regno++) | |
cbe92db4 KB |
1265 | if (register_cached (regno)) |
1266 | regcache_collect (regno, vals + regno); | |
61c5da0b KB |
1267 | } |
1268 | ||
c11d79f2 | 1269 | /* Store the special registers into the specified 64-bit and 32-bit |
0fe7bf7b | 1270 | locations. */ |
c11d79f2 KB |
1271 | |
1272 | static void | |
1273 | fill_sprs64 (uint64_t *iar, uint64_t *msr, uint32_t *cr, | |
0e061eef KB |
1274 | uint64_t *lr, uint64_t *ctr, uint32_t *xer, |
1275 | uint32_t *fpscr) | |
c11d79f2 | 1276 | { |
f1a91342 KB |
1277 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1278 | ||
1279 | /* Verify that the size of the size of the IAR buffer is the | |
1280 | same as the raw size of the PC (in the register cache). If | |
1281 | they're not, then either GDB has been built incorrectly, or | |
1282 | there's some other kind of internal error. To be really safe, | |
1283 | we should check all of the sizes. */ | |
12c266ea | 1284 | gdb_assert (sizeof (*iar) == DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM)); |
f1a91342 KB |
1285 | |
1286 | if (register_cached (PC_REGNUM)) | |
1287 | regcache_collect (PC_REGNUM, iar); | |
1288 | if (register_cached (tdep->ppc_ps_regnum)) | |
1289 | regcache_collect (tdep->ppc_ps_regnum, msr); | |
1290 | if (register_cached (tdep->ppc_cr_regnum)) | |
1291 | regcache_collect (tdep->ppc_cr_regnum, cr); | |
1292 | if (register_cached (tdep->ppc_lr_regnum)) | |
1293 | regcache_collect (tdep->ppc_lr_regnum, lr); | |
1294 | if (register_cached (tdep->ppc_ctr_regnum)) | |
1295 | regcache_collect (tdep->ppc_ctr_regnum, ctr); | |
1296 | if (register_cached (tdep->ppc_xer_regnum)) | |
1297 | regcache_collect (tdep->ppc_xer_regnum, xer); | |
0e061eef KB |
1298 | if (register_cached (tdep->ppc_fpscr_regnum)) |
1299 | regcache_collect (tdep->ppc_fpscr_regnum, fpscr); | |
61c5da0b KB |
1300 | } |
1301 | ||
1302 | static void | |
1303 | fill_sprs32 (unsigned long *iar, unsigned long *msr, unsigned long *cr, | |
0e061eef KB |
1304 | unsigned long *lr, unsigned long *ctr, unsigned long *xer, |
1305 | unsigned long *fpscr) | |
61c5da0b | 1306 | { |
f1a91342 KB |
1307 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1308 | ||
1309 | /* Verify that the size of the size of the IAR buffer is the | |
1310 | same as the raw size of the PC (in the register cache). If | |
1311 | they're not, then either GDB has been built incorrectly, or | |
1312 | there's some other kind of internal error. To be really safe, | |
1313 | we should check all of the sizes. | |
61c5da0b | 1314 | |
f1a91342 | 1315 | If this assert() fails, the most likely reason is that GDB was |
61c5da0b KB |
1316 | built incorrectly. In order to make use of many of the header |
1317 | files in /usr/include/sys, GDB needs to be configured so that | |
1318 | sizeof (long) == 4). */ | |
12c266ea | 1319 | gdb_assert (sizeof (*iar) == DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM)); |
f1a91342 KB |
1320 | |
1321 | if (register_cached (PC_REGNUM)) | |
1322 | regcache_collect (PC_REGNUM, iar); | |
1323 | if (register_cached (tdep->ppc_ps_regnum)) | |
1324 | regcache_collect (tdep->ppc_ps_regnum, msr); | |
1325 | if (register_cached (tdep->ppc_cr_regnum)) | |
1326 | regcache_collect (tdep->ppc_cr_regnum, cr); | |
1327 | if (register_cached (tdep->ppc_lr_regnum)) | |
1328 | regcache_collect (tdep->ppc_lr_regnum, lr); | |
1329 | if (register_cached (tdep->ppc_ctr_regnum)) | |
1330 | regcache_collect (tdep->ppc_ctr_regnum, ctr); | |
1331 | if (register_cached (tdep->ppc_xer_regnum)) | |
1332 | regcache_collect (tdep->ppc_xer_regnum, xer); | |
0e061eef KB |
1333 | if (register_cached (tdep->ppc_fpscr_regnum)) |
1334 | regcache_collect (tdep->ppc_fpscr_regnum, fpscr); | |
c11d79f2 KB |
1335 | } |
1336 | ||
1337 | /* Store all registers into pthread PDTID, which doesn't have a kernel | |
1338 | thread. | |
1339 | ||
0fe7bf7b MS |
1340 | It's possible to store a single register into a non-kernel pthread, |
1341 | but I doubt it's worth the effort. */ | |
c11d79f2 KB |
1342 | |
1343 | static void | |
206d3d3c | 1344 | store_regs_user_thread (pthdb_pthread_t pdtid) |
c11d79f2 KB |
1345 | { |
1346 | int status, i; | |
1347 | pthdb_context_t ctx; | |
61c5da0b KB |
1348 | uint32_t int32; |
1349 | uint64_t int64; | |
1350 | double dbl; | |
c11d79f2 | 1351 | |
8e2c28d4 | 1352 | if (debug_aix_thread) |
0fe7bf7b | 1353 | fprintf_unfiltered (gdb_stdlog, |
206d3d3c | 1354 | "store_regs_user_thread %lx\n", (long) pdtid); |
c11d79f2 | 1355 | |
0fe7bf7b MS |
1356 | /* Retrieve the thread's current context for its non-register |
1357 | values. */ | |
c11d79f2 KB |
1358 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
1359 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1360 | error ("aix-thread: store_registers: pthdb_pthread_context returned %s", |
1361 | pd_status2str (status)); | |
c11d79f2 | 1362 | |
61c5da0b | 1363 | /* Collect general-purpose register values from the regcache. */ |
c11d79f2 KB |
1364 | |
1365 | for (i = 0; i < 32; i++) | |
cbe92db4 KB |
1366 | if (register_cached (i)) |
1367 | { | |
1368 | if (arch64) | |
1369 | { | |
1370 | regcache_collect (i, (void *) &int64); | |
1371 | ctx.gpr[i] = int64; | |
1372 | } | |
1373 | else | |
1374 | { | |
1375 | regcache_collect (i, (void *) &int32); | |
1376 | ctx.gpr[i] = int32; | |
1377 | } | |
1378 | } | |
c11d79f2 | 1379 | |
61c5da0b KB |
1380 | /* Collect floating-point register values from the regcache. */ |
1381 | fill_fprs (ctx.fpr); | |
c11d79f2 | 1382 | |
61c5da0b KB |
1383 | /* Special registers (always kept in ctx as 64 bits). */ |
1384 | if (arch64) | |
1385 | { | |
0e061eef KB |
1386 | fill_sprs64 (&ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr, &ctx.xer, |
1387 | &ctx.fpscr); | |
61c5da0b KB |
1388 | } |
1389 | else | |
1390 | { | |
1391 | /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32. | |
1392 | Solution: use 32-bit temp variables. (The assert() in fill_sprs32() | |
1393 | will fail if the size of an unsigned long is incorrect. If this | |
1394 | happens, GDB needs to be reconfigured so that longs are 32-bits.) */ | |
0e061eef KB |
1395 | unsigned long tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, |
1396 | tmp_fpscr; | |
f1a91342 | 1397 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
61c5da0b | 1398 | |
0e061eef KB |
1399 | fill_sprs32 (&tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr, &tmp_xer, |
1400 | &tmp_fpscr); | |
f1a91342 | 1401 | if (register_cached (PC_REGNUM)) |
cbe92db4 | 1402 | ctx.iar = tmp_iar; |
f1a91342 | 1403 | if (register_cached (tdep->ppc_ps_regnum)) |
cbe92db4 | 1404 | ctx.msr = tmp_msr; |
f1a91342 | 1405 | if (register_cached (tdep->ppc_cr_regnum)) |
cbe92db4 | 1406 | ctx.cr = tmp_cr; |
f1a91342 | 1407 | if (register_cached (tdep->ppc_lr_regnum)) |
cbe92db4 | 1408 | ctx.lr = tmp_lr; |
f1a91342 | 1409 | if (register_cached (tdep->ppc_ctr_regnum)) |
cbe92db4 | 1410 | ctx.ctr = tmp_ctr; |
f1a91342 | 1411 | if (register_cached (tdep->ppc_xer_regnum)) |
cbe92db4 | 1412 | ctx.xer = tmp_xer; |
0e061eef KB |
1413 | if (register_cached (tdep->ppc_xer_regnum)) |
1414 | ctx.fpscr = tmp_fpscr; | |
61c5da0b | 1415 | } |
c11d79f2 KB |
1416 | |
1417 | status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx); | |
1418 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1419 | error ("aix-thread: store_registers: pthdb_pthread_setcontext returned %s", |
1420 | pd_status2str (status)); | |
c11d79f2 KB |
1421 | } |
1422 | ||
0fe7bf7b MS |
1423 | /* Store register REGNO if != -1 or all registers otherwise into |
1424 | kernel thread TID. | |
c11d79f2 | 1425 | |
0fe7bf7b MS |
1426 | AIX provides a way to set all of a kernel thread's GPRs, FPRs, or |
1427 | SPRs, but there's no way to set individual registers within those | |
1428 | groups. Therefore, if REGNO != -1, this function stores an entire | |
1429 | group. */ | |
c11d79f2 KB |
1430 | |
1431 | static void | |
206d3d3c | 1432 | store_regs_kernel_thread (int regno, pthdb_tid_t tid) |
c11d79f2 | 1433 | { |
61c5da0b KB |
1434 | uint64_t gprs64[32]; |
1435 | uint32_t gprs32[32]; | |
1436 | double fprs[32]; | |
c11d79f2 | 1437 | struct ptxsprs sprs64; |
61c5da0b KB |
1438 | struct ptsprs sprs32; |
1439 | int i; | |
f1a91342 | 1440 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c11d79f2 | 1441 | |
8e2c28d4 | 1442 | if (debug_aix_thread) |
206d3d3c KB |
1443 | fprintf_unfiltered (gdb_stdlog, |
1444 | "store_regs_kernel_thread tid=%lx regno=%d\n", | |
1445 | (long) tid, regno); | |
c11d79f2 | 1446 | |
0fe7bf7b | 1447 | /* General-purpose registers. */ |
c11d79f2 KB |
1448 | if (regno == -1 || regno < FP0_REGNUM) |
1449 | { | |
c11d79f2 | 1450 | if (arch64) |
61c5da0b | 1451 | { |
cbe92db4 KB |
1452 | /* Pre-fetch: some regs may not be in the cache. */ |
1453 | ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL); | |
61c5da0b KB |
1454 | fill_gprs64 (gprs64); |
1455 | ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL); | |
1456 | } | |
c11d79f2 | 1457 | else |
61c5da0b | 1458 | { |
cbe92db4 KB |
1459 | /* Pre-fetch: some regs may not be in the cache. */ |
1460 | ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL); | |
61c5da0b KB |
1461 | fill_gprs32 (gprs32); |
1462 | ptrace32 (PTT_WRITE_GPRS, tid, gprs32, 0, NULL); | |
1463 | } | |
c11d79f2 KB |
1464 | } |
1465 | ||
0fe7bf7b | 1466 | /* Floating-point registers. */ |
c11d79f2 KB |
1467 | |
1468 | if (regno == -1 || (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)) | |
1469 | { | |
cbe92db4 KB |
1470 | /* Pre-fetch: some regs may not be in the cache. */ |
1471 | ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL); | |
61c5da0b KB |
1472 | fill_fprs (fprs); |
1473 | ptrace32 (PTT_WRITE_FPRS, tid, (int *) fprs, 0, NULL); | |
c11d79f2 KB |
1474 | } |
1475 | ||
0fe7bf7b | 1476 | /* Special-purpose registers. */ |
c11d79f2 | 1477 | |
f1a91342 | 1478 | if (regno == -1 || special_register_p (regno)) |
c11d79f2 KB |
1479 | { |
1480 | if (arch64) | |
1481 | { | |
cbe92db4 | 1482 | /* Pre-fetch: some registers won't be in the cache. */ |
0fe7bf7b MS |
1483 | ptrace64aix (PTT_READ_SPRS, tid, |
1484 | (unsigned long) &sprs64, 0, NULL); | |
c11d79f2 | 1485 | fill_sprs64 (&sprs64.pt_iar, &sprs64.pt_msr, &sprs64.pt_cr, |
0e061eef KB |
1486 | &sprs64.pt_lr, &sprs64.pt_ctr, &sprs64.pt_xer, |
1487 | &sprs64.pt_fpscr); | |
0fe7bf7b MS |
1488 | ptrace64aix (PTT_WRITE_SPRS, tid, |
1489 | (unsigned long) &sprs64, 0, NULL); | |
c11d79f2 KB |
1490 | } |
1491 | else | |
1492 | { | |
cbe92db4 | 1493 | /* Pre-fetch: some registers won't be in the cache. */ |
c11d79f2 KB |
1494 | ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL); |
1495 | ||
61c5da0b | 1496 | fill_sprs32 (&sprs32.pt_iar, &sprs32.pt_msr, &sprs32.pt_cr, |
0e061eef KB |
1497 | &sprs32.pt_lr, &sprs32.pt_ctr, &sprs32.pt_xer, |
1498 | &sprs32.pt_fpscr); | |
c11d79f2 | 1499 | |
f1a91342 KB |
1500 | if (tdep->ppc_mq_regnum >= 0) |
1501 | if (register_cached (tdep->ppc_mq_regnum)) | |
1502 | regcache_collect (tdep->ppc_mq_regnum, &sprs32.pt_mq); | |
c11d79f2 KB |
1503 | |
1504 | ptrace32 (PTT_WRITE_SPRS, tid, (int *) &sprs32, 0, NULL); | |
1505 | } | |
1506 | } | |
1507 | } | |
1508 | ||
0fe7bf7b MS |
1509 | /* Store gdb's current view of the register set into the |
1510 | thread/process specified by inferior_ptid. */ | |
c11d79f2 KB |
1511 | |
1512 | static void | |
206d3d3c | 1513 | aix_thread_store_registers (int regno) |
c11d79f2 KB |
1514 | { |
1515 | struct thread_info *thread; | |
1516 | pthdb_tid_t tid; | |
1517 | ||
1518 | if (!PD_TID (inferior_ptid)) | |
206d3d3c | 1519 | base_target.to_store_registers (regno); |
c11d79f2 KB |
1520 | else |
1521 | { | |
1522 | thread = find_thread_pid (inferior_ptid); | |
1523 | tid = thread->private->tid; | |
1524 | ||
1525 | if (tid == PTHDB_INVALID_TID) | |
206d3d3c | 1526 | store_regs_user_thread (thread->private->pdtid); |
c11d79f2 | 1527 | else |
206d3d3c | 1528 | store_regs_kernel_thread (regno, tid); |
c11d79f2 KB |
1529 | } |
1530 | } | |
1531 | ||
0fe7bf7b MS |
1532 | /* Transfer LEN bytes of memory from GDB address MYADDR to target |
1533 | address MEMADDR if WRITE and vice versa otherwise. */ | |
c11d79f2 KB |
1534 | |
1535 | static int | |
206d3d3c KB |
1536 | aix_thread_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
1537 | struct mem_attrib *attrib, | |
1538 | struct target_ops *target) | |
c11d79f2 KB |
1539 | { |
1540 | int n; | |
14fa3751 KB |
1541 | struct cleanup *cleanup = save_inferior_ptid (); |
1542 | ||
1543 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
206d3d3c KB |
1544 | n = base_target.to_xfer_memory (memaddr, myaddr, len, |
1545 | write, attrib, &base_target); | |
14fa3751 | 1546 | do_cleanups (cleanup); |
c11d79f2 | 1547 | |
c11d79f2 KB |
1548 | return n; |
1549 | } | |
1550 | ||
0fe7bf7b | 1551 | /* Kill and forget about the inferior process. */ |
c11d79f2 KB |
1552 | |
1553 | static void | |
206d3d3c | 1554 | aix_thread_kill (void) |
c11d79f2 | 1555 | { |
14fa3751 KB |
1556 | struct cleanup *cleanup = save_inferior_ptid (); |
1557 | ||
1558 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
206d3d3c | 1559 | base_target.to_kill (); |
14fa3751 | 1560 | do_cleanups (cleanup); |
c11d79f2 KB |
1561 | } |
1562 | ||
0fe7bf7b | 1563 | /* Clean up after the inferior exits. */ |
c11d79f2 KB |
1564 | |
1565 | static void | |
206d3d3c | 1566 | aix_thread_mourn_inferior (void) |
c11d79f2 KB |
1567 | { |
1568 | pd_deactivate (); | |
206d3d3c | 1569 | base_target.to_mourn_inferior (); |
c11d79f2 KB |
1570 | } |
1571 | ||
0fe7bf7b | 1572 | /* Return whether thread PID is still valid. */ |
c11d79f2 KB |
1573 | |
1574 | static int | |
206d3d3c | 1575 | aix_thread_thread_alive (ptid_t ptid) |
c11d79f2 KB |
1576 | { |
1577 | if (!PD_TID (ptid)) | |
206d3d3c | 1578 | return base_target.to_thread_alive (ptid); |
c11d79f2 | 1579 | |
0fe7bf7b MS |
1580 | /* We update the thread list every time the child stops, so all |
1581 | valid threads should be in the thread list. */ | |
c11d79f2 KB |
1582 | return in_thread_list (ptid); |
1583 | } | |
1584 | ||
0fe7bf7b MS |
1585 | /* Return a printable representation of composite PID for use in |
1586 | "info threads" output. */ | |
c11d79f2 KB |
1587 | |
1588 | static char * | |
206d3d3c | 1589 | aix_thread_pid_to_str (ptid_t ptid) |
c11d79f2 KB |
1590 | { |
1591 | static char *ret = NULL; | |
1592 | ||
1593 | if (!PD_TID (ptid)) | |
206d3d3c | 1594 | return base_target.to_pid_to_str (ptid); |
c11d79f2 KB |
1595 | |
1596 | /* Free previous return value; a new one will be allocated by | |
1597 | xasprintf(). */ | |
1598 | xfree (ret); | |
1599 | ||
1600 | xasprintf (&ret, "Thread %ld", ptid_get_tid (ptid)); | |
1601 | return ret; | |
1602 | } | |
1603 | ||
0fe7bf7b MS |
1604 | /* Return a printable representation of extra information about |
1605 | THREAD, for use in "info threads" output. */ | |
c11d79f2 KB |
1606 | |
1607 | static char * | |
206d3d3c | 1608 | aix_thread_extra_thread_info (struct thread_info *thread) |
c11d79f2 KB |
1609 | { |
1610 | struct ui_file *buf; | |
1611 | int status; | |
1612 | pthdb_pthread_t pdtid; | |
1613 | pthdb_tid_t tid; | |
1614 | pthdb_state_t state; | |
1615 | pthdb_suspendstate_t suspendstate; | |
1616 | pthdb_detachstate_t detachstate; | |
1617 | int cancelpend; | |
1618 | long length; | |
1619 | static char *ret = NULL; | |
1620 | ||
1621 | if (!PD_TID (thread->ptid)) | |
1622 | return NULL; | |
1623 | ||
1624 | buf = mem_fileopen (); | |
1625 | ||
1626 | pdtid = thread->private->pdtid; | |
1627 | tid = thread->private->tid; | |
1628 | ||
1629 | if (tid != PTHDB_INVALID_TID) | |
1630 | fprintf_unfiltered (buf, "tid %d", tid); | |
1631 | ||
1632 | status = pthdb_pthread_state (pd_session, pdtid, &state); | |
1633 | if (status != PTHDB_SUCCESS) | |
1634 | state = PST_NOTSUP; | |
1635 | fprintf_unfiltered (buf, ", %s", state2str (state)); | |
1636 | ||
0fe7bf7b MS |
1637 | status = pthdb_pthread_suspendstate (pd_session, pdtid, |
1638 | &suspendstate); | |
c11d79f2 KB |
1639 | if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED) |
1640 | fprintf_unfiltered (buf, ", suspended"); | |
1641 | ||
0fe7bf7b MS |
1642 | status = pthdb_pthread_detachstate (pd_session, pdtid, |
1643 | &detachstate); | |
c11d79f2 KB |
1644 | if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED) |
1645 | fprintf_unfiltered (buf, ", detached"); | |
1646 | ||
1647 | pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend); | |
1648 | if (status == PTHDB_SUCCESS && cancelpend) | |
1649 | fprintf_unfiltered (buf, ", cancel pending"); | |
1650 | ||
1651 | ui_file_write (buf, "", 1); | |
1652 | ||
1653 | xfree (ret); /* Free old buffer. */ | |
1654 | ||
1655 | ret = ui_file_xstrdup (buf, &length); | |
1656 | ui_file_delete (buf); | |
1657 | ||
1658 | return ret; | |
1659 | } | |
1660 | ||
206d3d3c | 1661 | /* Initialize target aix_thread_ops. */ |
c11d79f2 KB |
1662 | |
1663 | static void | |
206d3d3c | 1664 | init_aix_thread_ops (void) |
c11d79f2 | 1665 | { |
206d3d3c KB |
1666 | aix_thread_ops.to_shortname = "aix-threads"; |
1667 | aix_thread_ops.to_longname = "AIX pthread support"; | |
1668 | aix_thread_ops.to_doc = "AIX pthread support"; | |
1669 | ||
1670 | aix_thread_ops.to_attach = aix_thread_attach; | |
1671 | aix_thread_ops.to_detach = aix_thread_detach; | |
1672 | aix_thread_ops.to_resume = aix_thread_resume; | |
1673 | aix_thread_ops.to_wait = aix_thread_wait; | |
1674 | aix_thread_ops.to_fetch_registers = aix_thread_fetch_registers; | |
1675 | aix_thread_ops.to_store_registers = aix_thread_store_registers; | |
1676 | aix_thread_ops.to_xfer_memory = aix_thread_xfer_memory; | |
1677 | /* No need for aix_thread_ops.to_create_inferior, because we activate thread | |
0fe7bf7b | 1678 | debugging when the inferior reaches pd_brk_addr. */ |
206d3d3c KB |
1679 | aix_thread_ops.to_kill = aix_thread_kill; |
1680 | aix_thread_ops.to_mourn_inferior = aix_thread_mourn_inferior; | |
1681 | aix_thread_ops.to_thread_alive = aix_thread_thread_alive; | |
1682 | aix_thread_ops.to_pid_to_str = aix_thread_pid_to_str; | |
1683 | aix_thread_ops.to_extra_thread_info = aix_thread_extra_thread_info; | |
1684 | aix_thread_ops.to_stratum = thread_stratum; | |
1685 | aix_thread_ops.to_magic = OPS_MAGIC; | |
c11d79f2 KB |
1686 | } |
1687 | ||
1688 | /* Module startup initialization function, automagically called by | |
0fe7bf7b | 1689 | init.c. */ |
c11d79f2 KB |
1690 | |
1691 | void | |
1692 | _initialize_aix_thread (void) | |
1693 | { | |
206d3d3c KB |
1694 | init_aix_thread_ops (); |
1695 | add_target (&aix_thread_ops); | |
c11d79f2 | 1696 | |
0fe7bf7b | 1697 | /* Notice when object files get loaded and unloaded. */ |
c11d79f2 KB |
1698 | target_new_objfile_chain = target_new_objfile_hook; |
1699 | target_new_objfile_hook = new_objfile; | |
8e2c28d4 KB |
1700 | |
1701 | add_show_from_set (add_set_cmd ("aix-thread", no_class, var_zinteger, | |
1702 | (char *) &debug_aix_thread, | |
1703 | "Set debugging of AIX thread module.\n" | |
1704 | "Enables printf debugging output.\n", | |
1705 | &setdebuglist), | |
1706 | &showdebuglist); | |
c11d79f2 | 1707 | } |