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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 | 51 | #include "ppc-tdep.h" |
0d4d5484 | 52 | #include "gdb_string.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 | |
1df84f13 AC |
108 | /* Copy of the target over which ops is pushed. This is more |
109 | convenient than a pointer to deprecated_child_ops or core_ops, | |
0fe7bf7b | 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 | ||
9a4105ab AC |
132 | /* Saved pointer to previous owner of |
133 | deprecated_target_new_objfile_hook. */ | |
c11d79f2 KB |
134 | |
135 | static void (*target_new_objfile_chain)(struct objfile *); | |
136 | ||
0fe7bf7b | 137 | /* Forward declarations for pthdb callbacks. */ |
c11d79f2 KB |
138 | |
139 | static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int); | |
140 | static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t); | |
141 | static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t); | |
142 | static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid, | |
0fe7bf7b MS |
143 | unsigned long long flags, |
144 | pthdb_context_t *context); | |
c11d79f2 | 145 | static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid, |
0fe7bf7b MS |
146 | unsigned long long flags, |
147 | pthdb_context_t *context); | |
c11d79f2 KB |
148 | static int pdc_alloc (pthdb_user_t, size_t, void **); |
149 | static int pdc_realloc (pthdb_user_t, void *, size_t, void **); | |
150 | static int pdc_dealloc (pthdb_user_t, void *); | |
151 | ||
0fe7bf7b | 152 | /* pthdb callbacks. */ |
c11d79f2 KB |
153 | |
154 | static pthdb_callbacks_t pd_callbacks = { | |
155 | pdc_symbol_addrs, | |
156 | pdc_read_data, | |
157 | pdc_write_data, | |
158 | pdc_read_regs, | |
159 | pdc_write_regs, | |
160 | pdc_alloc, | |
161 | pdc_realloc, | |
162 | pdc_dealloc, | |
163 | NULL | |
164 | }; | |
165 | ||
0fe7bf7b | 166 | /* Current pthdb session. */ |
c11d79f2 KB |
167 | |
168 | static pthdb_session_t pd_session; | |
169 | ||
0fe7bf7b MS |
170 | /* Return a printable representation of pthdebug function return |
171 | STATUS. */ | |
c11d79f2 KB |
172 | |
173 | static char * | |
174 | pd_status2str (int status) | |
175 | { | |
176 | switch (status) | |
177 | { | |
178 | case PTHDB_SUCCESS: return "SUCCESS"; | |
179 | case PTHDB_NOSYS: return "NOSYS"; | |
180 | case PTHDB_NOTSUP: return "NOTSUP"; | |
181 | case PTHDB_BAD_VERSION: return "BAD_VERSION"; | |
182 | case PTHDB_BAD_USER: return "BAD_USER"; | |
183 | case PTHDB_BAD_SESSION: return "BAD_SESSION"; | |
184 | case PTHDB_BAD_MODE: return "BAD_MODE"; | |
185 | case PTHDB_BAD_FLAGS: return "BAD_FLAGS"; | |
186 | case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK"; | |
187 | case PTHDB_BAD_POINTER: return "BAD_POINTER"; | |
188 | case PTHDB_BAD_CMD: return "BAD_CMD"; | |
189 | case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD"; | |
190 | case PTHDB_BAD_ATTR: return "BAD_ATTR"; | |
191 | case PTHDB_BAD_MUTEX: return "BAD_MUTEX"; | |
192 | case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR"; | |
193 | case PTHDB_BAD_COND: return "BAD_COND"; | |
194 | case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR"; | |
195 | case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK"; | |
196 | case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR"; | |
197 | case PTHDB_BAD_KEY: return "BAD_KEY"; | |
198 | case PTHDB_BAD_PTID: return "BAD_PTID"; | |
199 | case PTHDB_BAD_TID: return "BAD_TID"; | |
200 | case PTHDB_CALLBACK: return "CALLBACK"; | |
201 | case PTHDB_CONTEXT: return "CONTEXT"; | |
202 | case PTHDB_HELD: return "HELD"; | |
203 | case PTHDB_NOT_HELD: return "NOT_HELD"; | |
204 | case PTHDB_MEMORY: return "MEMORY"; | |
205 | case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED"; | |
206 | case PTHDB_SYMBOL: return "SYMBOL"; | |
207 | case PTHDB_NOT_AVAIL: return "NOT_AVAIL"; | |
208 | case PTHDB_INTERNAL: return "INTERNAL"; | |
209 | default: return "UNKNOWN"; | |
210 | } | |
211 | } | |
212 | ||
0fe7bf7b MS |
213 | /* A call to ptrace(REQ, ID, ...) just returned RET. Check for |
214 | exceptional conditions and either return nonlocally or else return | |
215 | 1 for success and 0 for failure. */ | |
c11d79f2 KB |
216 | |
217 | static int | |
218 | ptrace_check (int req, int id, int ret) | |
219 | { | |
220 | if (ret == 0 && !errno) | |
221 | return 1; | |
222 | ||
0fe7bf7b MS |
223 | /* According to ptrace(2), ptrace may fail with EPERM if "the |
224 | Identifier parameter corresponds to a kernel thread which is | |
225 | stopped in kernel mode and whose computational state cannot be | |
226 | read or written." This happens quite often with register reads. */ | |
c11d79f2 KB |
227 | |
228 | switch (req) | |
229 | { | |
230 | case PTT_READ_GPRS: | |
231 | case PTT_READ_FPRS: | |
232 | case PTT_READ_SPRS: | |
233 | if (ret == -1 && errno == EPERM) | |
42cc437f KB |
234 | { |
235 | if (debug_aix_thread) | |
0fe7bf7b | 236 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 237 | "ptrace (%d, %d) = %d (errno = %d)\n", |
42cc437f KB |
238 | req, id, ret, errno); |
239 | return ret == -1 ? 0 : 1; | |
240 | } | |
c11d79f2 KB |
241 | break; |
242 | } | |
243 | error ("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)", | |
be006b8b | 244 | req, id, ret, errno, safe_strerror (errno)); |
0fe7bf7b | 245 | return 0; /* Not reached. */ |
c11d79f2 KB |
246 | } |
247 | ||
0fe7bf7b | 248 | /* Call ptracex (REQ, ID, ADDR, DATA, BUF). Return success. */ |
c11d79f2 KB |
249 | |
250 | static int | |
251 | ptrace64aix (int req, int id, long long addr, int data, int *buf) | |
252 | { | |
253 | errno = 0; | |
254 | return ptrace_check (req, id, ptracex (req, id, addr, data, buf)); | |
255 | } | |
256 | ||
0fe7bf7b | 257 | /* Call ptrace (REQ, ID, ADDR, DATA, BUF). Return success. */ |
c11d79f2 KB |
258 | |
259 | static int | |
260 | ptrace32 (int req, int id, int *addr, int data, int *buf) | |
261 | { | |
262 | errno = 0; | |
0fe7bf7b | 263 | return ptrace_check (req, id, |
206d3d3c | 264 | ptrace (req, id, (int *) addr, data, buf)); |
c11d79f2 KB |
265 | } |
266 | ||
0fe7bf7b MS |
267 | /* If *PIDP is a composite process/thread id, convert it to a |
268 | process id. */ | |
c11d79f2 KB |
269 | |
270 | static void | |
271 | pid_to_prc (ptid_t *ptidp) | |
272 | { | |
273 | ptid_t ptid; | |
274 | ||
275 | ptid = *ptidp; | |
276 | if (PD_TID (ptid)) | |
277 | *ptidp = pid_to_ptid (PIDGET (ptid)); | |
278 | } | |
279 | ||
0fe7bf7b MS |
280 | /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to |
281 | the address of SYMBOLS[<i>].name. */ | |
c11d79f2 KB |
282 | |
283 | static int | |
284 | pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) | |
285 | { | |
286 | struct minimal_symbol *ms; | |
287 | int i; | |
288 | char *name; | |
289 | ||
8e2c28d4 KB |
290 | if (debug_aix_thread) |
291 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 | 292 | "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n", |
8e2c28d4 | 293 | user, (long) symbols, count); |
c11d79f2 KB |
294 | |
295 | for (i = 0; i < count; i++) | |
296 | { | |
297 | name = symbols[i].name; | |
8e2c28d4 | 298 | if (debug_aix_thread) |
0fe7bf7b | 299 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 300 | " symbols[%d].name = \"%s\"\n", i, name); |
c11d79f2 KB |
301 | |
302 | if (!*name) | |
303 | symbols[i].addr = 0; | |
304 | else | |
305 | { | |
306 | if (!(ms = lookup_minimal_symbol (name, NULL, NULL))) | |
307 | { | |
8e2c28d4 | 308 | if (debug_aix_thread) |
27bae383 | 309 | fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n"); |
c11d79f2 KB |
310 | return PDC_FAILURE; |
311 | } | |
312 | symbols[i].addr = SYMBOL_VALUE_ADDRESS (ms); | |
313 | } | |
8e2c28d4 | 314 | if (debug_aix_thread) |
27bae383 | 315 | fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = %s\n", |
bb599908 | 316 | i, hex_string (symbols[i].addr)); |
c11d79f2 | 317 | } |
8e2c28d4 | 318 | if (debug_aix_thread) |
27bae383 | 319 | fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n"); |
c11d79f2 KB |
320 | return PDC_SUCCESS; |
321 | } | |
322 | ||
0fe7bf7b MS |
323 | /* Read registers call back function should be able to read the |
324 | context information of a debuggee kernel thread from an active | |
325 | process or from a core file. The information should be formatted | |
326 | in context64 form for both 32-bit and 64-bit process. | |
327 | If successful return 0, else non-zero is returned. */ | |
328 | ||
c11d79f2 KB |
329 | static int |
330 | pdc_read_regs (pthdb_user_t user, | |
331 | pthdb_tid_t tid, | |
332 | unsigned long long flags, | |
333 | pthdb_context_t *context) | |
334 | { | |
0fe7bf7b MS |
335 | /* This function doesn't appear to be used, so we could probably |
336 | just return 0 here. HOWEVER, if it is not defined, the OS will | |
337 | complain and several thread debug functions will fail. In case | |
338 | this is needed, I have implemented what I think it should do, | |
339 | however this code is untested. */ | |
340 | ||
063715bf JB |
341 | uint64_t gprs64[ppc_num_gprs]; |
342 | uint32_t gprs32[ppc_num_gprs]; | |
343 | double fprs[ppc_num_fprs]; | |
c11d79f2 KB |
344 | struct ptxsprs sprs64; |
345 | struct ptsprs sprs32; | |
346 | ||
8e2c28d4 | 347 | if (debug_aix_thread) |
27bae383 | 348 | fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n", |
bb599908 | 349 | (int) tid, hex_string (flags)); |
c11d79f2 | 350 | |
0fe7bf7b | 351 | /* General-purpose registers. */ |
c11d79f2 KB |
352 | if (flags & PTHDB_FLAG_GPRS) |
353 | { | |
354 | if (arch64) | |
355 | { | |
0fe7bf7b MS |
356 | if (!ptrace64aix (PTT_READ_GPRS, tid, |
357 | (unsigned long) gprs64, 0, NULL)) | |
c11d79f2 KB |
358 | memset (gprs64, 0, sizeof (gprs64)); |
359 | memcpy (context->gpr, gprs64, sizeof(gprs64)); | |
360 | } | |
361 | else | |
362 | { | |
363 | if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) | |
364 | memset (gprs32, 0, sizeof (gprs32)); | |
365 | memcpy (context->gpr, gprs32, sizeof(gprs32)); | |
366 | } | |
367 | } | |
368 | ||
0fe7bf7b | 369 | /* Floating-point registers. */ |
c11d79f2 KB |
370 | if (flags & PTHDB_FLAG_FPRS) |
371 | { | |
372 | if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) | |
373 | memset (fprs, 0, sizeof (fprs)); | |
374 | memcpy (context->fpr, fprs, sizeof(fprs)); | |
375 | } | |
376 | ||
0fe7bf7b | 377 | /* Special-purpose registers. */ |
c11d79f2 KB |
378 | if (flags & PTHDB_FLAG_SPRS) |
379 | { | |
380 | if (arch64) | |
381 | { | |
0fe7bf7b MS |
382 | if (!ptrace64aix (PTT_READ_SPRS, tid, |
383 | (unsigned long) &sprs64, 0, NULL)) | |
c11d79f2 KB |
384 | memset (&sprs64, 0, sizeof (sprs64)); |
385 | memcpy (&context->msr, &sprs64, sizeof(sprs64)); | |
386 | } | |
387 | else | |
388 | { | |
389 | if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) | |
390 | memset (&sprs32, 0, sizeof (sprs32)); | |
391 | memcpy (&context->msr, &sprs32, sizeof(sprs32)); | |
392 | } | |
393 | } | |
394 | return 0; | |
395 | } | |
396 | ||
0fe7bf7b MS |
397 | /* Write register function should be able to write requested context |
398 | information to specified debuggee's kernel thread id. | |
399 | If successful return 0, else non-zero is returned. */ | |
400 | ||
c11d79f2 KB |
401 | static int |
402 | pdc_write_regs (pthdb_user_t user, | |
403 | pthdb_tid_t tid, | |
404 | unsigned long long flags, | |
405 | pthdb_context_t *context) | |
406 | { | |
0fe7bf7b MS |
407 | /* This function doesn't appear to be used, so we could probably |
408 | just return 0 here. HOWEVER, if it is not defined, the OS will | |
409 | complain and several thread debug functions will fail. In case | |
410 | this is needed, I have implemented what I think it should do, | |
411 | however this code is untested. */ | |
c11d79f2 | 412 | |
8e2c28d4 | 413 | if (debug_aix_thread) |
27bae383 | 414 | fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n", |
bb599908 | 415 | (int) tid, hex_string (flags)); |
c11d79f2 | 416 | |
0fe7bf7b | 417 | /* General-purpose registers. */ |
c11d79f2 KB |
418 | if (flags & PTHDB_FLAG_GPRS) |
419 | { | |
420 | if (arch64) | |
0fe7bf7b | 421 | ptrace64aix (PTT_WRITE_GPRS, tid, |
206d3d3c | 422 | (unsigned long) context->gpr, 0, NULL); |
c11d79f2 | 423 | else |
206d3d3c | 424 | ptrace32 (PTT_WRITE_GPRS, tid, (int *) context->gpr, 0, NULL); |
c11d79f2 KB |
425 | } |
426 | ||
0fe7bf7b | 427 | /* Floating-point registers. */ |
c11d79f2 KB |
428 | if (flags & PTHDB_FLAG_FPRS) |
429 | { | |
206d3d3c | 430 | ptrace32 (PTT_WRITE_FPRS, tid, (int *) context->fpr, 0, NULL); |
c11d79f2 KB |
431 | } |
432 | ||
0fe7bf7b | 433 | /* Special-purpose registers. */ |
c11d79f2 KB |
434 | if (flags & PTHDB_FLAG_SPRS) |
435 | { | |
436 | if (arch64) | |
437 | { | |
0fe7bf7b MS |
438 | ptrace64aix (PTT_WRITE_SPRS, tid, |
439 | (unsigned long) &context->msr, 0, NULL); | |
c11d79f2 KB |
440 | } |
441 | else | |
442 | { | |
206d3d3c | 443 | ptrace32 (PTT_WRITE_SPRS, tid, (int *) &context->msr, 0, NULL); |
c11d79f2 KB |
444 | } |
445 | } | |
446 | return 0; | |
447 | } | |
448 | ||
0fe7bf7b | 449 | /* pthdb callback: read LEN bytes from process ADDR into BUF. */ |
c11d79f2 KB |
450 | |
451 | static int | |
0fe7bf7b MS |
452 | pdc_read_data (pthdb_user_t user, void *buf, |
453 | pthdb_addr_t addr, size_t len) | |
c11d79f2 KB |
454 | { |
455 | int status, ret; | |
456 | ||
8e2c28d4 KB |
457 | if (debug_aix_thread) |
458 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 | 459 | "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
bb599908 | 460 | user, (long) buf, hex_string (addr), len); |
c11d79f2 KB |
461 | |
462 | status = target_read_memory (addr, buf, len); | |
463 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; | |
464 | ||
8e2c28d4 | 465 | if (debug_aix_thread) |
27bae383 | 466 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", |
0fe7bf7b | 467 | status, pd_status2str (ret)); |
c11d79f2 KB |
468 | return ret; |
469 | } | |
470 | ||
0fe7bf7b | 471 | /* pthdb callback: write LEN bytes from BUF to process ADDR. */ |
c11d79f2 KB |
472 | |
473 | static int | |
0fe7bf7b MS |
474 | pdc_write_data (pthdb_user_t user, void *buf, |
475 | pthdb_addr_t addr, size_t len) | |
c11d79f2 KB |
476 | { |
477 | int status, ret; | |
478 | ||
8e2c28d4 KB |
479 | if (debug_aix_thread) |
480 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 | 481 | "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
bb599908 | 482 | user, (long) buf, hex_string (addr), len); |
c11d79f2 KB |
483 | |
484 | status = target_write_memory (addr, buf, len); | |
485 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; | |
486 | ||
8e2c28d4 | 487 | if (debug_aix_thread) |
27bae383 | 488 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", status, |
8e2c28d4 | 489 | pd_status2str (ret)); |
c11d79f2 KB |
490 | return ret; |
491 | } | |
492 | ||
0fe7bf7b MS |
493 | /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it |
494 | in BUFP. */ | |
c11d79f2 KB |
495 | |
496 | static int | |
497 | pdc_alloc (pthdb_user_t user, size_t len, void **bufp) | |
498 | { | |
8e2c28d4 KB |
499 | if (debug_aix_thread) |
500 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 | 501 | "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n", |
8e2c28d4 | 502 | user, len, (long) bufp); |
c11d79f2 | 503 | *bufp = xmalloc (len); |
8e2c28d4 | 504 | if (debug_aix_thread) |
0fe7bf7b | 505 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 506 | " malloc returned 0x%lx\n", (long) *bufp); |
0fe7bf7b MS |
507 | |
508 | /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never | |
509 | be returned. */ | |
510 | ||
c11d79f2 KB |
511 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
512 | } | |
513 | ||
0fe7bf7b MS |
514 | /* pthdb callback: reallocate BUF, which was allocated by the alloc or |
515 | realloc callback, so that it contains LEN bytes, and store a | |
516 | pointer to the result in BUFP. */ | |
c11d79f2 KB |
517 | |
518 | static int | |
519 | pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp) | |
520 | { | |
8e2c28d4 KB |
521 | if (debug_aix_thread) |
522 | fprintf_unfiltered (gdb_stdlog, | |
27bae383 | 523 | "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n", |
8e2c28d4 | 524 | user, (long) buf, len, (long) bufp); |
be006b8b | 525 | *bufp = xrealloc (buf, len); |
8e2c28d4 | 526 | if (debug_aix_thread) |
0fe7bf7b | 527 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 528 | " realloc returned 0x%lx\n", (long) *bufp); |
c11d79f2 KB |
529 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
530 | } | |
531 | ||
0fe7bf7b MS |
532 | /* pthdb callback: free BUF, which was allocated by the alloc or |
533 | realloc callback. */ | |
c11d79f2 KB |
534 | |
535 | static int | |
536 | pdc_dealloc (pthdb_user_t user, void *buf) | |
537 | { | |
8e2c28d4 | 538 | if (debug_aix_thread) |
0fe7bf7b | 539 | fprintf_unfiltered (gdb_stdlog, |
27bae383 | 540 | "pdc_free (user = %ld, buf = 0x%lx)\n", user, |
8e2c28d4 | 541 | (long) buf); |
c11d79f2 KB |
542 | xfree (buf); |
543 | return PDC_SUCCESS; | |
544 | } | |
545 | ||
0fe7bf7b | 546 | /* Return a printable representation of pthread STATE. */ |
c11d79f2 KB |
547 | |
548 | static char * | |
549 | state2str (pthdb_state_t state) | |
550 | { | |
551 | switch (state) | |
552 | { | |
553 | case PST_IDLE: return "idle"; /* being created */ | |
554 | case PST_RUN: return "running"; /* running */ | |
555 | case PST_SLEEP: return "sleeping"; /* awaiting an event */ | |
556 | case PST_READY: return "ready"; /* runnable */ | |
557 | case PST_TERM: return "finished"; /* awaiting a join/detach */ | |
558 | default: return "unknown"; | |
559 | } | |
560 | } | |
561 | ||
0fe7bf7b | 562 | /* qsort() comparison function for sorting pd_thread structs by pthid. */ |
c11d79f2 KB |
563 | |
564 | static int | |
565 | pcmp (const void *p1v, const void *p2v) | |
566 | { | |
567 | struct pd_thread *p1 = (struct pd_thread *) p1v; | |
568 | struct pd_thread *p2 = (struct pd_thread *) p2v; | |
569 | return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid; | |
570 | } | |
571 | ||
0fe7bf7b | 572 | /* iterate_over_threads() callback for counting GDB threads. */ |
c11d79f2 KB |
573 | |
574 | static int | |
575 | giter_count (struct thread_info *thread, void *countp) | |
576 | { | |
577 | (*(int *) countp)++; | |
578 | return 0; | |
579 | } | |
580 | ||
0fe7bf7b | 581 | /* iterate_over_threads() callback for accumulating GDB thread pids. */ |
c11d79f2 KB |
582 | |
583 | static int | |
584 | giter_accum (struct thread_info *thread, void *bufp) | |
585 | { | |
586 | **(struct thread_info ***) bufp = thread; | |
587 | (*(struct thread_info ***) bufp)++; | |
588 | return 0; | |
589 | } | |
590 | ||
591 | /* ptid comparison function */ | |
0fe7bf7b | 592 | |
c11d79f2 KB |
593 | static int |
594 | ptid_cmp (ptid_t ptid1, ptid_t ptid2) | |
595 | { | |
596 | int pid1, pid2; | |
597 | ||
598 | if (ptid_get_pid (ptid1) < ptid_get_pid (ptid2)) | |
599 | return -1; | |
600 | else if (ptid_get_pid (ptid1) > ptid_get_pid (ptid2)) | |
601 | return 1; | |
602 | else if (ptid_get_tid (ptid1) < ptid_get_tid (ptid2)) | |
603 | return -1; | |
604 | else if (ptid_get_tid (ptid1) > ptid_get_tid (ptid2)) | |
605 | return 1; | |
606 | else if (ptid_get_lwp (ptid1) < ptid_get_lwp (ptid2)) | |
607 | return -1; | |
608 | else if (ptid_get_lwp (ptid1) > ptid_get_lwp (ptid2)) | |
609 | return 1; | |
610 | else | |
611 | return 0; | |
612 | } | |
613 | ||
0fe7bf7b | 614 | /* qsort() comparison function for sorting thread_info structs by pid. */ |
c11d79f2 KB |
615 | |
616 | static int | |
617 | gcmp (const void *t1v, const void *t2v) | |
618 | { | |
619 | struct thread_info *t1 = *(struct thread_info **) t1v; | |
620 | struct thread_info *t2 = *(struct thread_info **) t2v; | |
621 | return ptid_cmp (t1->ptid, t2->ptid); | |
622 | } | |
623 | ||
9ad7bec7 JB |
624 | /* Search through the list of all kernel threads for the thread |
625 | that has stopped on a SIGTRAP signal, and return its TID. | |
626 | Return 0 if none found. */ | |
627 | ||
628 | static pthdb_tid_t | |
629 | get_signaled_thread (void) | |
630 | { | |
631 | struct thrdsinfo64 thrinf; | |
632 | pthdb_tid_t ktid = 0; | |
633 | int result = 0; | |
634 | ||
635 | /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */ | |
636 | extern int getthrds (pid_t, struct thrdsinfo64 *, | |
637 | int, pthdb_tid_t *, int); | |
638 | ||
639 | while (1) | |
640 | { | |
641 | if (getthrds (PIDGET (inferior_ptid), &thrinf, | |
642 | sizeof (thrinf), &ktid, 1) != 1) | |
643 | break; | |
644 | ||
645 | if (thrinf.ti_cursig == SIGTRAP) | |
646 | return thrinf.ti_tid; | |
647 | } | |
648 | ||
649 | /* Didn't find any thread stopped on a SIGTRAP signal. */ | |
650 | return 0; | |
651 | } | |
652 | ||
c11d79f2 KB |
653 | /* Synchronize GDB's thread list with libpthdebug's. |
654 | ||
655 | There are some benefits of doing this every time the inferior stops: | |
656 | ||
0fe7bf7b MS |
657 | - allows users to run thread-specific commands without needing to |
658 | run "info threads" first | |
c11d79f2 KB |
659 | |
660 | - helps pthdb_tid_pthread() work properly (see "libpthdebug | |
661 | peculiarities" at the top of this module) | |
662 | ||
0fe7bf7b MS |
663 | - simplifies the demands placed on libpthdebug, which seems to |
664 | have difficulty with certain call patterns */ | |
c11d79f2 KB |
665 | |
666 | static void | |
667 | sync_threadlists (void) | |
668 | { | |
669 | int cmd, status, infpid; | |
670 | int pcount, psize, pi, gcount, gi; | |
671 | struct pd_thread *pbuf; | |
672 | struct thread_info **gbuf, **g, *thread; | |
673 | pthdb_pthread_t pdtid; | |
674 | pthread_t pthid; | |
675 | pthdb_tid_t tid; | |
c11d79f2 | 676 | |
0fe7bf7b | 677 | /* Accumulate an array of libpthdebug threads sorted by pthread id. */ |
c11d79f2 KB |
678 | |
679 | pcount = 0; | |
680 | psize = 1; | |
681 | pbuf = (struct pd_thread *) xmalloc (psize * sizeof *pbuf); | |
682 | ||
683 | for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT) | |
684 | { | |
685 | status = pthdb_pthread (pd_session, &pdtid, cmd); | |
686 | if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD) | |
687 | break; | |
688 | ||
689 | status = pthdb_pthread_ptid (pd_session, pdtid, &pthid); | |
690 | if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID) | |
691 | continue; | |
692 | ||
693 | if (pcount == psize) | |
694 | { | |
695 | psize *= 2; | |
0fe7bf7b MS |
696 | pbuf = (struct pd_thread *) xrealloc (pbuf, |
697 | psize * sizeof *pbuf); | |
c11d79f2 KB |
698 | } |
699 | pbuf[pcount].pdtid = pdtid; | |
700 | pbuf[pcount].pthid = pthid; | |
701 | pcount++; | |
702 | } | |
703 | ||
704 | for (pi = 0; pi < pcount; pi++) | |
705 | { | |
706 | status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid); | |
707 | if (status != PTHDB_SUCCESS) | |
708 | tid = PTHDB_INVALID_TID; | |
709 | pbuf[pi].tid = tid; | |
710 | } | |
711 | ||
712 | qsort (pbuf, pcount, sizeof *pbuf, pcmp); | |
713 | ||
0fe7bf7b | 714 | /* Accumulate an array of GDB threads sorted by pid. */ |
c11d79f2 KB |
715 | |
716 | gcount = 0; | |
717 | iterate_over_threads (giter_count, &gcount); | |
718 | g = gbuf = (struct thread_info **) xmalloc (gcount * sizeof *gbuf); | |
719 | iterate_over_threads (giter_accum, &g); | |
720 | qsort (gbuf, gcount, sizeof *gbuf, gcmp); | |
721 | ||
0fe7bf7b | 722 | /* Apply differences between the two arrays to GDB's thread list. */ |
c11d79f2 KB |
723 | |
724 | infpid = PIDGET (inferior_ptid); | |
725 | for (pi = gi = 0; pi < pcount || gi < gcount;) | |
726 | { | |
c11d79f2 | 727 | if (pi == pcount) |
c11d79f2 | 728 | { |
42cc437f | 729 | delete_thread (gbuf[gi]->ptid); |
c11d79f2 KB |
730 | gi++; |
731 | } | |
42cc437f | 732 | else if (gi == gcount) |
c11d79f2 | 733 | { |
42cc437f | 734 | thread = add_thread (BUILD_THREAD (pbuf[pi].pthid, infpid)); |
c11d79f2 | 735 | thread->private = xmalloc (sizeof (struct private_thread_info)); |
42cc437f KB |
736 | thread->private->pdtid = pbuf[pi].pdtid; |
737 | thread->private->tid = pbuf[pi].tid; | |
c11d79f2 KB |
738 | pi++; |
739 | } | |
42cc437f KB |
740 | else |
741 | { | |
742 | ptid_t pptid, gptid; | |
743 | int cmp_result; | |
744 | ||
745 | pptid = BUILD_THREAD (pbuf[pi].pthid, infpid); | |
746 | gptid = gbuf[gi]->ptid; | |
747 | pdtid = pbuf[pi].pdtid; | |
748 | tid = pbuf[pi].tid; | |
c11d79f2 | 749 | |
42cc437f KB |
750 | cmp_result = ptid_cmp (pptid, gptid); |
751 | ||
752 | if (cmp_result == 0) | |
753 | { | |
754 | gbuf[gi]->private->pdtid = pdtid; | |
755 | gbuf[gi]->private->tid = tid; | |
756 | pi++; | |
757 | gi++; | |
758 | } | |
759 | else if (cmp_result > 0) | |
760 | { | |
761 | delete_thread (gptid); | |
762 | gi++; | |
763 | } | |
764 | else | |
765 | { | |
766 | thread = add_thread (pptid); | |
767 | thread->private = xmalloc (sizeof (struct private_thread_info)); | |
768 | thread->private->pdtid = pdtid; | |
769 | thread->private->tid = tid; | |
770 | pi++; | |
771 | } | |
772 | } | |
c11d79f2 KB |
773 | } |
774 | ||
775 | xfree (pbuf); | |
776 | xfree (gbuf); | |
777 | } | |
778 | ||
9ad7bec7 JB |
779 | /* Iterate_over_threads() callback for locating a thread, using |
780 | the TID of its associated kernel thread. */ | |
c11d79f2 KB |
781 | |
782 | static int | |
9ad7bec7 | 783 | iter_tid (struct thread_info *thread, void *tidp) |
c11d79f2 | 784 | { |
9ad7bec7 | 785 | const pthdb_tid_t tid = *(pthdb_tid_t *)tidp; |
c11d79f2 | 786 | |
9ad7bec7 | 787 | return (thread->private->tid == tid); |
c11d79f2 KB |
788 | } |
789 | ||
0fe7bf7b MS |
790 | /* Synchronize libpthdebug's state with the inferior and with GDB, |
791 | generate a composite process/thread <pid> for the current thread, | |
792 | set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */ | |
c11d79f2 KB |
793 | |
794 | static ptid_t | |
795 | pd_update (int set_infpid) | |
796 | { | |
797 | int status; | |
798 | ptid_t ptid; | |
9ad7bec7 JB |
799 | pthdb_tid_t tid; |
800 | struct thread_info *thread = NULL; | |
c11d79f2 KB |
801 | |
802 | if (!pd_active) | |
803 | return inferior_ptid; | |
804 | ||
805 | status = pthdb_session_update (pd_session); | |
806 | if (status != PTHDB_SUCCESS) | |
807 | return inferior_ptid; | |
808 | ||
809 | sync_threadlists (); | |
810 | ||
0fe7bf7b | 811 | /* Define "current thread" as one that just received a trap signal. */ |
c11d79f2 | 812 | |
9ad7bec7 JB |
813 | tid = get_signaled_thread (); |
814 | if (tid != 0) | |
815 | thread = iterate_over_threads (iter_tid, &tid); | |
c11d79f2 KB |
816 | if (!thread) |
817 | ptid = inferior_ptid; | |
818 | else | |
819 | { | |
820 | ptid = thread->ptid; | |
821 | if (set_infpid) | |
822 | inferior_ptid = ptid; | |
823 | } | |
824 | return ptid; | |
825 | } | |
826 | ||
0fe7bf7b MS |
827 | /* Try to start debugging threads in the current process. |
828 | If successful and SET_INFPID, set inferior_ptid to reflect the | |
829 | current thread. */ | |
c11d79f2 KB |
830 | |
831 | static ptid_t | |
832 | pd_activate (int set_infpid) | |
833 | { | |
834 | int status; | |
835 | ||
836 | status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT, | |
0fe7bf7b MS |
837 | PTHDB_FLAG_REGS, &pd_callbacks, |
838 | &pd_session); | |
c11d79f2 KB |
839 | if (status != PTHDB_SUCCESS) |
840 | { | |
841 | return inferior_ptid; | |
842 | } | |
843 | pd_active = 1; | |
844 | return pd_update (set_infpid); | |
845 | } | |
846 | ||
0fe7bf7b | 847 | /* Undo the effects of pd_activate(). */ |
c11d79f2 KB |
848 | |
849 | static void | |
850 | pd_deactivate (void) | |
851 | { | |
852 | if (!pd_active) | |
853 | return; | |
854 | pthdb_session_destroy (pd_session); | |
855 | ||
856 | pid_to_prc (&inferior_ptid); | |
857 | pd_active = 0; | |
858 | } | |
859 | ||
0fe7bf7b MS |
860 | /* An object file has just been loaded. Check whether the current |
861 | application is pthreaded, and if so, prepare for thread debugging. */ | |
c11d79f2 KB |
862 | |
863 | static void | |
864 | pd_enable (void) | |
865 | { | |
866 | int status; | |
867 | char *stub_name; | |
868 | struct minimal_symbol *ms; | |
869 | ||
0fe7bf7b | 870 | /* Don't initialize twice. */ |
c11d79f2 KB |
871 | if (pd_able) |
872 | return; | |
873 | ||
0fe7bf7b | 874 | /* Check application word size. */ |
3acba339 | 875 | arch64 = register_size (current_gdbarch, 0) == 8; |
c11d79f2 | 876 | |
0fe7bf7b | 877 | /* Check whether the application is pthreaded. */ |
c11d79f2 | 878 | stub_name = NULL; |
0fe7bf7b MS |
879 | status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS, |
880 | &pd_callbacks, &stub_name); | |
881 | if ((status != PTHDB_SUCCESS && | |
882 | status != PTHDB_NOT_PTHREADED) || !stub_name) | |
c11d79f2 KB |
883 | return; |
884 | ||
0fe7bf7b | 885 | /* Set a breakpoint on the returned stub function. */ |
c11d79f2 KB |
886 | if (!(ms = lookup_minimal_symbol (stub_name, NULL, NULL))) |
887 | return; | |
888 | pd_brk_addr = SYMBOL_VALUE_ADDRESS (ms); | |
889 | if (!create_thread_event_breakpoint (pd_brk_addr)) | |
890 | return; | |
891 | ||
0fe7bf7b | 892 | /* Prepare for thread debugging. */ |
206d3d3c KB |
893 | base_target = current_target; |
894 | push_target (&aix_thread_ops); | |
c11d79f2 KB |
895 | pd_able = 1; |
896 | ||
0fe7bf7b MS |
897 | /* If we're debugging a core file or an attached inferior, the |
898 | pthread library may already have been initialized, so try to | |
899 | activate thread debugging. */ | |
c11d79f2 KB |
900 | pd_activate (1); |
901 | } | |
902 | ||
0fe7bf7b | 903 | /* Undo the effects of pd_enable(). */ |
c11d79f2 KB |
904 | |
905 | static void | |
906 | pd_disable (void) | |
907 | { | |
908 | if (!pd_able) | |
909 | return; | |
910 | if (pd_active) | |
911 | pd_deactivate (); | |
912 | pd_able = 0; | |
206d3d3c | 913 | unpush_target (&aix_thread_ops); |
c11d79f2 KB |
914 | } |
915 | ||
9a4105ab | 916 | /* deprecated_target_new_objfile_hook callback. |
c11d79f2 | 917 | |
0fe7bf7b MS |
918 | If OBJFILE is non-null, check whether a threaded application is |
919 | being debugged, and if so, prepare for thread debugging. | |
c11d79f2 | 920 | |
0fe7bf7b | 921 | If OBJFILE is null, stop debugging threads. */ |
c11d79f2 KB |
922 | |
923 | static void | |
924 | new_objfile (struct objfile *objfile) | |
925 | { | |
926 | if (objfile) | |
927 | pd_enable (); | |
928 | else | |
929 | pd_disable (); | |
930 | ||
931 | if (target_new_objfile_chain) | |
932 | target_new_objfile_chain (objfile); | |
933 | } | |
934 | ||
0fe7bf7b | 935 | /* Attach to process specified by ARGS. */ |
c11d79f2 KB |
936 | |
937 | static void | |
206d3d3c | 938 | aix_thread_attach (char *args, int from_tty) |
c11d79f2 | 939 | { |
206d3d3c | 940 | base_target.to_attach (args, from_tty); |
c11d79f2 KB |
941 | pd_activate (1); |
942 | } | |
943 | ||
206d3d3c | 944 | /* Detach from the process attached to by aix_thread_attach(). */ |
c11d79f2 KB |
945 | |
946 | static void | |
206d3d3c | 947 | aix_thread_detach (char *args, int from_tty) |
c11d79f2 | 948 | { |
6c0c456d | 949 | pd_disable (); |
206d3d3c | 950 | base_target.to_detach (args, from_tty); |
c11d79f2 KB |
951 | } |
952 | ||
953 | /* Tell the inferior process to continue running thread PID if != -1 | |
0fe7bf7b | 954 | and all threads otherwise. */ |
c11d79f2 KB |
955 | |
956 | static void | |
206d3d3c | 957 | aix_thread_resume (ptid_t ptid, int step, enum target_signal sig) |
c11d79f2 KB |
958 | { |
959 | struct thread_info *thread; | |
960 | pthdb_tid_t tid[2]; | |
961 | ||
962 | if (!PD_TID (ptid)) | |
14fa3751 KB |
963 | { |
964 | struct cleanup *cleanup = save_inferior_ptid (); | |
965 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
206d3d3c | 966 | base_target.to_resume (ptid, step, sig); |
14fa3751 KB |
967 | do_cleanups (cleanup); |
968 | } | |
c11d79f2 KB |
969 | else |
970 | { | |
971 | thread = find_thread_pid (ptid); | |
972 | if (!thread) | |
0fe7bf7b MS |
973 | error ("aix-thread resume: unknown pthread %ld", |
974 | TIDGET (ptid)); | |
c11d79f2 KB |
975 | |
976 | tid[0] = thread->private->tid; | |
977 | if (tid[0] == PTHDB_INVALID_TID) | |
0fe7bf7b MS |
978 | error ("aix-thread resume: no tid for pthread %ld", |
979 | TIDGET (ptid)); | |
c11d79f2 KB |
980 | tid[1] = 0; |
981 | ||
982 | if (arch64) | |
0fe7bf7b | 983 | ptrace64aix (PTT_CONTINUE, tid[0], 1, |
206d3d3c | 984 | target_signal_to_host (sig), (int *) tid); |
c11d79f2 KB |
985 | else |
986 | ptrace32 (PTT_CONTINUE, tid[0], (int *) 1, | |
206d3d3c | 987 | target_signal_to_host (sig), (int *) tid); |
c11d79f2 KB |
988 | } |
989 | } | |
990 | ||
0fe7bf7b MS |
991 | /* Wait for thread/process ID if != -1 or for any thread otherwise. |
992 | If an error occurs, return -1, else return the pid of the stopped | |
993 | thread. */ | |
c11d79f2 KB |
994 | |
995 | static ptid_t | |
206d3d3c | 996 | aix_thread_wait (ptid_t ptid, struct target_waitstatus *status) |
c11d79f2 | 997 | { |
14fa3751 KB |
998 | struct cleanup *cleanup = save_inferior_ptid (); |
999 | ||
c11d79f2 | 1000 | pid_to_prc (&ptid); |
14fa3751 KB |
1001 | |
1002 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
206d3d3c | 1003 | ptid = base_target.to_wait (ptid, status); |
14fa3751 KB |
1004 | do_cleanups (cleanup); |
1005 | ||
c11d79f2 KB |
1006 | if (PIDGET (ptid) == -1) |
1007 | return pid_to_ptid (-1); | |
1008 | ||
0fe7bf7b | 1009 | /* Check whether libpthdebug might be ready to be initialized. */ |
c11d79f2 KB |
1010 | if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED && |
1011 | status->value.sig == TARGET_SIGNAL_TRAP && | |
1012 | read_pc_pid (ptid) - DECR_PC_AFTER_BREAK == pd_brk_addr) | |
1013 | return pd_activate (0); | |
1014 | ||
1015 | return pd_update (0); | |
1016 | } | |
1017 | ||
0fe7bf7b | 1018 | /* Record that the 64-bit general-purpose registers contain VALS. */ |
c11d79f2 KB |
1019 | |
1020 | static void | |
1021 | supply_gprs64 (uint64_t *vals) | |
1022 | { | |
cdf2c5f5 | 1023 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c11d79f2 KB |
1024 | int regno; |
1025 | ||
063715bf | 1026 | for (regno = 0; regno < ppc_num_gprs; regno++) |
23a6d369 AC |
1027 | regcache_raw_supply (current_regcache, tdep->ppc_gp0_regnum + regno, |
1028 | (char *) (vals + regno)); | |
c11d79f2 KB |
1029 | } |
1030 | ||
0fe7bf7b | 1031 | /* Record that 32-bit register REGNO contains VAL. */ |
c11d79f2 KB |
1032 | |
1033 | static void | |
1034 | supply_reg32 (int regno, uint32_t val) | |
1035 | { | |
23a6d369 | 1036 | regcache_raw_supply (current_regcache, regno, (char *) &val); |
c11d79f2 KB |
1037 | } |
1038 | ||
0fe7bf7b | 1039 | /* Record that the floating-point registers contain VALS. */ |
c11d79f2 KB |
1040 | |
1041 | static void | |
1042 | supply_fprs (double *vals) | |
1043 | { | |
366f009f | 1044 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c11d79f2 KB |
1045 | int regno; |
1046 | ||
383f0f5b JB |
1047 | /* This function should never be called on architectures without |
1048 | floating-point registers. */ | |
552e377b | 1049 | gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); |
383f0f5b | 1050 | |
063715bf | 1051 | for (regno = 0; regno < ppc_num_fprs; regno++) |
23a6d369 AC |
1052 | regcache_raw_supply (current_regcache, regno + tdep->ppc_fp0_regnum, |
1053 | (char *) (vals + regno)); | |
c11d79f2 KB |
1054 | } |
1055 | ||
f1a91342 KB |
1056 | /* Predicate to test whether given register number is a "special" register. */ |
1057 | static int | |
1058 | special_register_p (int regno) | |
1059 | { | |
1060 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
1061 | ||
1062 | return regno == PC_REGNUM | |
1063 | || regno == tdep->ppc_ps_regnum | |
1064 | || regno == tdep->ppc_cr_regnum | |
1065 | || regno == tdep->ppc_lr_regnum | |
1066 | || regno == tdep->ppc_ctr_regnum | |
1067 | || regno == tdep->ppc_xer_regnum | |
383f0f5b | 1068 | || (tdep->ppc_fpscr_regnum >= 0 && regno == tdep->ppc_fpscr_regnum) |
f1a91342 KB |
1069 | || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum); |
1070 | } | |
1071 | ||
1072 | ||
0fe7bf7b MS |
1073 | /* Record that the special registers contain the specified 64-bit and |
1074 | 32-bit values. */ | |
c11d79f2 KB |
1075 | |
1076 | static void | |
1077 | supply_sprs64 (uint64_t iar, uint64_t msr, uint32_t cr, | |
0e061eef KB |
1078 | uint64_t lr, uint64_t ctr, uint32_t xer, |
1079 | uint32_t fpscr) | |
c11d79f2 | 1080 | { |
f1a91342 KB |
1081 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1082 | ||
23a6d369 AC |
1083 | regcache_raw_supply (current_regcache, PC_REGNUM, (char *) &iar); |
1084 | regcache_raw_supply (current_regcache, tdep->ppc_ps_regnum, (char *) &msr); | |
1085 | regcache_raw_supply (current_regcache, tdep->ppc_cr_regnum, (char *) &cr); | |
1086 | regcache_raw_supply (current_regcache, tdep->ppc_lr_regnum, (char *) &lr); | |
1087 | regcache_raw_supply (current_regcache, tdep->ppc_ctr_regnum, (char *) &ctr); | |
1088 | regcache_raw_supply (current_regcache, tdep->ppc_xer_regnum, (char *) &xer); | |
383f0f5b | 1089 | if (tdep->ppc_fpscr_regnum >= 0) |
23a6d369 AC |
1090 | regcache_raw_supply (current_regcache, tdep->ppc_fpscr_regnum, |
1091 | (char *) &fpscr); | |
c11d79f2 KB |
1092 | } |
1093 | ||
0fe7bf7b MS |
1094 | /* Record that the special registers contain the specified 32-bit |
1095 | values. */ | |
c11d79f2 KB |
1096 | |
1097 | static void | |
1098 | supply_sprs32 (uint32_t iar, uint32_t msr, uint32_t cr, | |
0e061eef KB |
1099 | uint32_t lr, uint32_t ctr, uint32_t xer, |
1100 | uint32_t fpscr) | |
c11d79f2 | 1101 | { |
f1a91342 KB |
1102 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1103 | ||
23a6d369 AC |
1104 | regcache_raw_supply (current_regcache, PC_REGNUM, (char *) &iar); |
1105 | regcache_raw_supply (current_regcache, tdep->ppc_ps_regnum, (char *) &msr); | |
1106 | regcache_raw_supply (current_regcache, tdep->ppc_cr_regnum, (char *) &cr); | |
1107 | regcache_raw_supply (current_regcache, tdep->ppc_lr_regnum, (char *) &lr); | |
1108 | regcache_raw_supply (current_regcache, tdep->ppc_ctr_regnum, (char *) &ctr); | |
1109 | regcache_raw_supply (current_regcache, tdep->ppc_xer_regnum, (char *) &xer); | |
383f0f5b | 1110 | if (tdep->ppc_fpscr_regnum >= 0) |
23a6d369 AC |
1111 | regcache_raw_supply (current_regcache, tdep->ppc_fpscr_regnum, |
1112 | (char *) &fpscr); | |
c11d79f2 KB |
1113 | } |
1114 | ||
1115 | /* Fetch all registers from pthread PDTID, which doesn't have a kernel | |
1116 | thread. | |
1117 | ||
0fe7bf7b MS |
1118 | There's no way to query a single register from a non-kernel |
1119 | pthread, so there's no need for a single-register version of this | |
1120 | function. */ | |
c11d79f2 KB |
1121 | |
1122 | static void | |
206d3d3c | 1123 | fetch_regs_user_thread (pthdb_pthread_t pdtid) |
c11d79f2 | 1124 | { |
cdf2c5f5 | 1125 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c11d79f2 KB |
1126 | int status, i; |
1127 | pthdb_context_t ctx; | |
1128 | ||
8e2c28d4 | 1129 | if (debug_aix_thread) |
206d3d3c KB |
1130 | fprintf_unfiltered (gdb_stdlog, |
1131 | "fetch_regs_user_thread %lx\n", (long) pdtid); | |
c11d79f2 KB |
1132 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
1133 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1134 | error ("aix-thread: fetch_registers: pthdb_pthread_context returned %s", |
1135 | pd_status2str (status)); | |
c11d79f2 | 1136 | |
0fe7bf7b | 1137 | /* General-purpose registers. */ |
c11d79f2 KB |
1138 | |
1139 | if (arch64) | |
1140 | supply_gprs64 (ctx.gpr); | |
1141 | else | |
063715bf | 1142 | for (i = 0; i < ppc_num_gprs; i++) |
cdf2c5f5 | 1143 | supply_reg32 (tdep->ppc_gp0_regnum + i, ctx.gpr[i]); |
c11d79f2 | 1144 | |
0fe7bf7b | 1145 | /* Floating-point registers. */ |
c11d79f2 | 1146 | |
552e377b | 1147 | if (ppc_floating_point_unit_p (current_gdbarch)) |
383f0f5b | 1148 | supply_fprs (ctx.fpr); |
c11d79f2 | 1149 | |
0fe7bf7b | 1150 | /* Special registers. */ |
c11d79f2 KB |
1151 | |
1152 | if (arch64) | |
0e061eef KB |
1153 | supply_sprs64 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer, |
1154 | ctx.fpscr); | |
c11d79f2 | 1155 | else |
0e061eef KB |
1156 | supply_sprs32 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer, |
1157 | ctx.fpscr); | |
c11d79f2 KB |
1158 | } |
1159 | ||
0fe7bf7b MS |
1160 | /* Fetch register REGNO if != -1 or all registers otherwise from |
1161 | kernel thread TID. | |
c11d79f2 | 1162 | |
0fe7bf7b MS |
1163 | AIX provides a way to query all of a kernel thread's GPRs, FPRs, or |
1164 | SPRs, but there's no way to query individual registers within those | |
1165 | groups. Therefore, if REGNO != -1, this function fetches an entire | |
1166 | group. | |
c11d79f2 | 1167 | |
0fe7bf7b MS |
1168 | Unfortunately, kernel thread register queries often fail with |
1169 | EPERM, indicating that the thread is in kernel space. This breaks | |
1170 | backtraces of threads other than the current one. To make that | |
1171 | breakage obvious without throwing an error to top level (which is | |
1172 | bad e.g. during "info threads" output), zero registers that can't | |
1173 | be retrieved. */ | |
c11d79f2 KB |
1174 | |
1175 | static void | |
206d3d3c | 1176 | fetch_regs_kernel_thread (int regno, pthdb_tid_t tid) |
c11d79f2 | 1177 | { |
366f009f | 1178 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
063715bf JB |
1179 | uint64_t gprs64[ppc_num_gprs]; |
1180 | uint32_t gprs32[ppc_num_gprs]; | |
1181 | double fprs[ppc_num_fprs]; | |
c11d79f2 KB |
1182 | struct ptxsprs sprs64; |
1183 | struct ptsprs sprs32; | |
1184 | int i; | |
1185 | ||
8e2c28d4 KB |
1186 | if (debug_aix_thread) |
1187 | fprintf_unfiltered (gdb_stdlog, | |
206d3d3c KB |
1188 | "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n", |
1189 | (long) tid, regno, arch64); | |
c11d79f2 | 1190 | |
0fe7bf7b | 1191 | /* General-purpose registers. */ |
daf6dc85 JB |
1192 | if (regno == -1 |
1193 | || (tdep->ppc_gp0_regnum <= regno | |
1194 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)) | |
c11d79f2 KB |
1195 | { |
1196 | if (arch64) | |
1197 | { | |
0fe7bf7b MS |
1198 | if (!ptrace64aix (PTT_READ_GPRS, tid, |
1199 | (unsigned long) gprs64, 0, NULL)) | |
c11d79f2 KB |
1200 | memset (gprs64, 0, sizeof (gprs64)); |
1201 | supply_gprs64 (gprs64); | |
1202 | } | |
1203 | else | |
1204 | { | |
1205 | if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) | |
1206 | memset (gprs32, 0, sizeof (gprs32)); | |
063715bf | 1207 | for (i = 0; i < ppc_num_gprs; i++) |
cdf2c5f5 | 1208 | supply_reg32 (tdep->ppc_gp0_regnum + i, gprs32[i]); |
c11d79f2 KB |
1209 | } |
1210 | } | |
1211 | ||
0fe7bf7b | 1212 | /* Floating-point registers. */ |
c11d79f2 | 1213 | |
383f0f5b JB |
1214 | if (ppc_floating_point_unit_p (current_gdbarch) |
1215 | && (regno == -1 | |
1216 | || (regno >= tdep->ppc_fp0_regnum | |
1217 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) | |
c11d79f2 KB |
1218 | { |
1219 | if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) | |
1220 | memset (fprs, 0, sizeof (fprs)); | |
1221 | supply_fprs (fprs); | |
1222 | } | |
1223 | ||
0fe7bf7b | 1224 | /* Special-purpose registers. */ |
c11d79f2 | 1225 | |
f1a91342 | 1226 | if (regno == -1 || special_register_p (regno)) |
c11d79f2 KB |
1227 | { |
1228 | if (arch64) | |
1229 | { | |
0fe7bf7b MS |
1230 | if (!ptrace64aix (PTT_READ_SPRS, tid, |
1231 | (unsigned long) &sprs64, 0, NULL)) | |
c11d79f2 KB |
1232 | memset (&sprs64, 0, sizeof (sprs64)); |
1233 | supply_sprs64 (sprs64.pt_iar, sprs64.pt_msr, sprs64.pt_cr, | |
0e061eef KB |
1234 | sprs64.pt_lr, sprs64.pt_ctr, sprs64.pt_xer, |
1235 | sprs64.pt_fpscr); | |
c11d79f2 KB |
1236 | } |
1237 | else | |
1238 | { | |
f1a91342 KB |
1239 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1240 | ||
c11d79f2 KB |
1241 | if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) |
1242 | memset (&sprs32, 0, sizeof (sprs32)); | |
1243 | supply_sprs32 (sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr, | |
0e061eef KB |
1244 | sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer, |
1245 | sprs32.pt_fpscr); | |
c11d79f2 | 1246 | |
f1a91342 | 1247 | if (tdep->ppc_mq_regnum >= 0) |
23a6d369 AC |
1248 | regcache_raw_supply (current_regcache, tdep->ppc_mq_regnum, |
1249 | (char *) &sprs32.pt_mq); | |
c11d79f2 KB |
1250 | } |
1251 | } | |
1252 | } | |
1253 | ||
1254 | /* Fetch register REGNO if != -1 or all registers otherwise in the | |
0fe7bf7b | 1255 | thread/process specified by inferior_ptid. */ |
c11d79f2 KB |
1256 | |
1257 | static void | |
206d3d3c | 1258 | aix_thread_fetch_registers (int regno) |
c11d79f2 KB |
1259 | { |
1260 | struct thread_info *thread; | |
1261 | pthdb_tid_t tid; | |
1262 | ||
1263 | if (!PD_TID (inferior_ptid)) | |
206d3d3c | 1264 | base_target.to_fetch_registers (regno); |
c11d79f2 KB |
1265 | else |
1266 | { | |
1267 | thread = find_thread_pid (inferior_ptid); | |
1268 | tid = thread->private->tid; | |
1269 | ||
1270 | if (tid == PTHDB_INVALID_TID) | |
206d3d3c | 1271 | fetch_regs_user_thread (thread->private->pdtid); |
c11d79f2 | 1272 | else |
206d3d3c | 1273 | fetch_regs_kernel_thread (regno, tid); |
c11d79f2 KB |
1274 | } |
1275 | } | |
1276 | ||
61c5da0b KB |
1277 | /* Store the gp registers into an array of uint32_t or uint64_t. */ |
1278 | ||
1279 | static void | |
1280 | fill_gprs64 (uint64_t *vals) | |
1281 | { | |
366f009f | 1282 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
61c5da0b KB |
1283 | int regno; |
1284 | ||
daf6dc85 JB |
1285 | for (regno = 0; regno < ppc_num_gprs; regno++) |
1286 | if (register_cached (tdep->ppc_gp0_regnum + regno)) | |
822c9732 AC |
1287 | regcache_raw_collect (current_regcache, tdep->ppc_gp0_regnum + regno, |
1288 | vals + regno); | |
61c5da0b KB |
1289 | } |
1290 | ||
1291 | static void | |
1292 | fill_gprs32 (uint32_t *vals) | |
1293 | { | |
366f009f | 1294 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
61c5da0b KB |
1295 | int regno; |
1296 | ||
daf6dc85 JB |
1297 | for (regno = 0; regno < ppc_num_gprs; regno++) |
1298 | if (register_cached (tdep->ppc_gp0_regnum + regno)) | |
822c9732 AC |
1299 | regcache_raw_collect (current_regcache, tdep->ppc_gp0_regnum + regno, |
1300 | vals + regno); | |
61c5da0b KB |
1301 | } |
1302 | ||
1303 | /* Store the floating point registers into a double array. */ | |
1304 | static void | |
1305 | fill_fprs (double *vals) | |
1306 | { | |
366f009f | 1307 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
61c5da0b KB |
1308 | int regno; |
1309 | ||
383f0f5b JB |
1310 | /* This function should never be called on architectures without |
1311 | floating-point registers. */ | |
552e377b | 1312 | gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); |
383f0f5b | 1313 | |
366f009f JB |
1314 | for (regno = tdep->ppc_fp0_regnum; |
1315 | regno < tdep->ppc_fp0_regnum + ppc_num_fprs; | |
1316 | regno++) | |
cbe92db4 | 1317 | if (register_cached (regno)) |
822c9732 | 1318 | regcache_raw_collect (current_regcache, regno, vals + regno); |
61c5da0b KB |
1319 | } |
1320 | ||
c11d79f2 | 1321 | /* Store the special registers into the specified 64-bit and 32-bit |
0fe7bf7b | 1322 | locations. */ |
c11d79f2 KB |
1323 | |
1324 | static void | |
1325 | fill_sprs64 (uint64_t *iar, uint64_t *msr, uint32_t *cr, | |
0e061eef KB |
1326 | uint64_t *lr, uint64_t *ctr, uint32_t *xer, |
1327 | uint32_t *fpscr) | |
c11d79f2 | 1328 | { |
f1a91342 KB |
1329 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1330 | ||
1331 | /* Verify that the size of the size of the IAR buffer is the | |
1332 | same as the raw size of the PC (in the register cache). If | |
1333 | they're not, then either GDB has been built incorrectly, or | |
1334 | there's some other kind of internal error. To be really safe, | |
1335 | we should check all of the sizes. */ | |
3acba339 | 1336 | gdb_assert (sizeof (*iar) == register_size (current_gdbarch, PC_REGNUM)); |
f1a91342 KB |
1337 | |
1338 | if (register_cached (PC_REGNUM)) | |
822c9732 | 1339 | regcache_raw_collect (current_regcache, PC_REGNUM, iar); |
f1a91342 | 1340 | if (register_cached (tdep->ppc_ps_regnum)) |
822c9732 | 1341 | regcache_raw_collect (current_regcache, tdep->ppc_ps_regnum, msr); |
f1a91342 | 1342 | if (register_cached (tdep->ppc_cr_regnum)) |
822c9732 | 1343 | regcache_raw_collect (current_regcache, tdep->ppc_cr_regnum, cr); |
f1a91342 | 1344 | if (register_cached (tdep->ppc_lr_regnum)) |
822c9732 | 1345 | regcache_raw_collect (current_regcache, tdep->ppc_lr_regnum, lr); |
f1a91342 | 1346 | if (register_cached (tdep->ppc_ctr_regnum)) |
822c9732 | 1347 | regcache_raw_collect (current_regcache, tdep->ppc_ctr_regnum, ctr); |
f1a91342 | 1348 | if (register_cached (tdep->ppc_xer_regnum)) |
822c9732 | 1349 | regcache_raw_collect (current_regcache, tdep->ppc_xer_regnum, xer); |
383f0f5b JB |
1350 | if (tdep->ppc_fpscr_regnum >= 0 |
1351 | && register_cached (tdep->ppc_fpscr_regnum)) | |
822c9732 | 1352 | regcache_raw_collect (current_regcache, tdep->ppc_fpscr_regnum, fpscr); |
61c5da0b KB |
1353 | } |
1354 | ||
1355 | static void | |
1356 | fill_sprs32 (unsigned long *iar, unsigned long *msr, unsigned long *cr, | |
0e061eef KB |
1357 | unsigned long *lr, unsigned long *ctr, unsigned long *xer, |
1358 | unsigned long *fpscr) | |
61c5da0b | 1359 | { |
f1a91342 KB |
1360 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
1361 | ||
1362 | /* Verify that the size of the size of the IAR buffer is the | |
1363 | same as the raw size of the PC (in the register cache). If | |
1364 | they're not, then either GDB has been built incorrectly, or | |
1365 | there's some other kind of internal error. To be really safe, | |
1366 | we should check all of the sizes. | |
61c5da0b | 1367 | |
f1a91342 | 1368 | If this assert() fails, the most likely reason is that GDB was |
61c5da0b KB |
1369 | built incorrectly. In order to make use of many of the header |
1370 | files in /usr/include/sys, GDB needs to be configured so that | |
1371 | sizeof (long) == 4). */ | |
3acba339 | 1372 | gdb_assert (sizeof (*iar) == register_size (current_gdbarch, PC_REGNUM)); |
f1a91342 KB |
1373 | |
1374 | if (register_cached (PC_REGNUM)) | |
822c9732 | 1375 | regcache_raw_collect (current_regcache, PC_REGNUM, iar); |
f1a91342 | 1376 | if (register_cached (tdep->ppc_ps_regnum)) |
822c9732 | 1377 | regcache_raw_collect (current_regcache, tdep->ppc_ps_regnum, msr); |
f1a91342 | 1378 | if (register_cached (tdep->ppc_cr_regnum)) |
822c9732 | 1379 | regcache_raw_collect (current_regcache, tdep->ppc_cr_regnum, cr); |
f1a91342 | 1380 | if (register_cached (tdep->ppc_lr_regnum)) |
822c9732 | 1381 | regcache_raw_collect (current_regcache, tdep->ppc_lr_regnum, lr); |
f1a91342 | 1382 | if (register_cached (tdep->ppc_ctr_regnum)) |
822c9732 | 1383 | regcache_raw_collect (current_regcache, tdep->ppc_ctr_regnum, ctr); |
f1a91342 | 1384 | if (register_cached (tdep->ppc_xer_regnum)) |
822c9732 | 1385 | regcache_raw_collect (current_regcache, tdep->ppc_xer_regnum, xer); |
383f0f5b JB |
1386 | if (tdep->ppc_fpscr_regnum >= 0 |
1387 | && register_cached (tdep->ppc_fpscr_regnum)) | |
822c9732 | 1388 | regcache_raw_collect (current_regcache, tdep->ppc_fpscr_regnum, fpscr); |
c11d79f2 KB |
1389 | } |
1390 | ||
1391 | /* Store all registers into pthread PDTID, which doesn't have a kernel | |
1392 | thread. | |
1393 | ||
0fe7bf7b MS |
1394 | It's possible to store a single register into a non-kernel pthread, |
1395 | but I doubt it's worth the effort. */ | |
c11d79f2 KB |
1396 | |
1397 | static void | |
206d3d3c | 1398 | store_regs_user_thread (pthdb_pthread_t pdtid) |
c11d79f2 | 1399 | { |
cdf2c5f5 | 1400 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c11d79f2 KB |
1401 | int status, i; |
1402 | pthdb_context_t ctx; | |
61c5da0b KB |
1403 | uint32_t int32; |
1404 | uint64_t int64; | |
1405 | double dbl; | |
c11d79f2 | 1406 | |
8e2c28d4 | 1407 | if (debug_aix_thread) |
0fe7bf7b | 1408 | fprintf_unfiltered (gdb_stdlog, |
206d3d3c | 1409 | "store_regs_user_thread %lx\n", (long) pdtid); |
c11d79f2 | 1410 | |
0fe7bf7b MS |
1411 | /* Retrieve the thread's current context for its non-register |
1412 | values. */ | |
c11d79f2 KB |
1413 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
1414 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1415 | error ("aix-thread: store_registers: pthdb_pthread_context returned %s", |
1416 | pd_status2str (status)); | |
c11d79f2 | 1417 | |
61c5da0b | 1418 | /* Collect general-purpose register values from the regcache. */ |
c11d79f2 | 1419 | |
063715bf | 1420 | for (i = 0; i < ppc_num_gprs; i++) |
cdf2c5f5 | 1421 | if (register_cached (tdep->ppc_gp0_regnum + i)) |
cbe92db4 KB |
1422 | { |
1423 | if (arch64) | |
1424 | { | |
822c9732 AC |
1425 | regcache_raw_collect (current_regcache, tdep->ppc_gp0_regnum + i, |
1426 | (void *) &int64); | |
cbe92db4 KB |
1427 | ctx.gpr[i] = int64; |
1428 | } | |
1429 | else | |
1430 | { | |
822c9732 AC |
1431 | regcache_raw_collect (current_regcache, tdep->ppc_gp0_regnum + i, |
1432 | (void *) &int32); | |
cbe92db4 KB |
1433 | ctx.gpr[i] = int32; |
1434 | } | |
1435 | } | |
c11d79f2 | 1436 | |
61c5da0b | 1437 | /* Collect floating-point register values from the regcache. */ |
552e377b | 1438 | if (ppc_floating_point_unit_p (current_gdbarch)) |
383f0f5b | 1439 | fill_fprs (ctx.fpr); |
c11d79f2 | 1440 | |
61c5da0b KB |
1441 | /* Special registers (always kept in ctx as 64 bits). */ |
1442 | if (arch64) | |
1443 | { | |
0e061eef KB |
1444 | fill_sprs64 (&ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr, &ctx.xer, |
1445 | &ctx.fpscr); | |
61c5da0b KB |
1446 | } |
1447 | else | |
1448 | { | |
1449 | /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32. | |
1450 | Solution: use 32-bit temp variables. (The assert() in fill_sprs32() | |
1451 | will fail if the size of an unsigned long is incorrect. If this | |
1452 | happens, GDB needs to be reconfigured so that longs are 32-bits.) */ | |
0e061eef KB |
1453 | unsigned long tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, |
1454 | tmp_fpscr; | |
61c5da0b | 1455 | |
0e061eef KB |
1456 | fill_sprs32 (&tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr, &tmp_xer, |
1457 | &tmp_fpscr); | |
f1a91342 | 1458 | if (register_cached (PC_REGNUM)) |
cbe92db4 | 1459 | ctx.iar = tmp_iar; |
f1a91342 | 1460 | if (register_cached (tdep->ppc_ps_regnum)) |
cbe92db4 | 1461 | ctx.msr = tmp_msr; |
f1a91342 | 1462 | if (register_cached (tdep->ppc_cr_regnum)) |
cbe92db4 | 1463 | ctx.cr = tmp_cr; |
f1a91342 | 1464 | if (register_cached (tdep->ppc_lr_regnum)) |
cbe92db4 | 1465 | ctx.lr = tmp_lr; |
f1a91342 | 1466 | if (register_cached (tdep->ppc_ctr_regnum)) |
cbe92db4 | 1467 | ctx.ctr = tmp_ctr; |
f1a91342 | 1468 | if (register_cached (tdep->ppc_xer_regnum)) |
cbe92db4 | 1469 | ctx.xer = tmp_xer; |
0e061eef KB |
1470 | if (register_cached (tdep->ppc_xer_regnum)) |
1471 | ctx.fpscr = tmp_fpscr; | |
61c5da0b | 1472 | } |
c11d79f2 KB |
1473 | |
1474 | status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx); | |
1475 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1476 | error ("aix-thread: store_registers: pthdb_pthread_setcontext returned %s", |
1477 | pd_status2str (status)); | |
c11d79f2 KB |
1478 | } |
1479 | ||
0fe7bf7b MS |
1480 | /* Store register REGNO if != -1 or all registers otherwise into |
1481 | kernel thread TID. | |
c11d79f2 | 1482 | |
0fe7bf7b MS |
1483 | AIX provides a way to set all of a kernel thread's GPRs, FPRs, or |
1484 | SPRs, but there's no way to set individual registers within those | |
1485 | groups. Therefore, if REGNO != -1, this function stores an entire | |
1486 | group. */ | |
c11d79f2 KB |
1487 | |
1488 | static void | |
206d3d3c | 1489 | store_regs_kernel_thread (int regno, pthdb_tid_t tid) |
c11d79f2 | 1490 | { |
366f009f | 1491 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
063715bf JB |
1492 | uint64_t gprs64[ppc_num_gprs]; |
1493 | uint32_t gprs32[ppc_num_gprs]; | |
1494 | double fprs[ppc_num_fprs]; | |
c11d79f2 | 1495 | struct ptxsprs sprs64; |
61c5da0b KB |
1496 | struct ptsprs sprs32; |
1497 | int i; | |
c11d79f2 | 1498 | |
8e2c28d4 | 1499 | if (debug_aix_thread) |
206d3d3c KB |
1500 | fprintf_unfiltered (gdb_stdlog, |
1501 | "store_regs_kernel_thread tid=%lx regno=%d\n", | |
1502 | (long) tid, regno); | |
c11d79f2 | 1503 | |
0fe7bf7b | 1504 | /* General-purpose registers. */ |
daf6dc85 JB |
1505 | if (regno == -1 |
1506 | || (tdep->ppc_gp0_regnum <= regno | |
1507 | && regno < tdep->ppc_gp0_regnum + ppc_num_fprs)) | |
c11d79f2 | 1508 | { |
c11d79f2 | 1509 | if (arch64) |
61c5da0b | 1510 | { |
cbe92db4 KB |
1511 | /* Pre-fetch: some regs may not be in the cache. */ |
1512 | ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL); | |
61c5da0b KB |
1513 | fill_gprs64 (gprs64); |
1514 | ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL); | |
1515 | } | |
c11d79f2 | 1516 | else |
61c5da0b | 1517 | { |
cbe92db4 KB |
1518 | /* Pre-fetch: some regs may not be in the cache. */ |
1519 | ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL); | |
61c5da0b KB |
1520 | fill_gprs32 (gprs32); |
1521 | ptrace32 (PTT_WRITE_GPRS, tid, gprs32, 0, NULL); | |
1522 | } | |
c11d79f2 KB |
1523 | } |
1524 | ||
0fe7bf7b | 1525 | /* Floating-point registers. */ |
c11d79f2 | 1526 | |
383f0f5b JB |
1527 | if (ppc_floating_point_unit_p (current_gdbarch) |
1528 | && (regno == -1 | |
1529 | || (regno >= tdep->ppc_fp0_regnum | |
1530 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) | |
c11d79f2 | 1531 | { |
cbe92db4 KB |
1532 | /* Pre-fetch: some regs may not be in the cache. */ |
1533 | ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL); | |
61c5da0b KB |
1534 | fill_fprs (fprs); |
1535 | ptrace32 (PTT_WRITE_FPRS, tid, (int *) fprs, 0, NULL); | |
c11d79f2 KB |
1536 | } |
1537 | ||
0fe7bf7b | 1538 | /* Special-purpose registers. */ |
c11d79f2 | 1539 | |
f1a91342 | 1540 | if (regno == -1 || special_register_p (regno)) |
c11d79f2 KB |
1541 | { |
1542 | if (arch64) | |
1543 | { | |
cbe92db4 | 1544 | /* Pre-fetch: some registers won't be in the cache. */ |
0fe7bf7b MS |
1545 | ptrace64aix (PTT_READ_SPRS, tid, |
1546 | (unsigned long) &sprs64, 0, NULL); | |
c11d79f2 | 1547 | fill_sprs64 (&sprs64.pt_iar, &sprs64.pt_msr, &sprs64.pt_cr, |
0e061eef KB |
1548 | &sprs64.pt_lr, &sprs64.pt_ctr, &sprs64.pt_xer, |
1549 | &sprs64.pt_fpscr); | |
0fe7bf7b MS |
1550 | ptrace64aix (PTT_WRITE_SPRS, tid, |
1551 | (unsigned long) &sprs64, 0, NULL); | |
c11d79f2 KB |
1552 | } |
1553 | else | |
1554 | { | |
cbe92db4 | 1555 | /* Pre-fetch: some registers won't be in the cache. */ |
c11d79f2 KB |
1556 | ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL); |
1557 | ||
61c5da0b | 1558 | fill_sprs32 (&sprs32.pt_iar, &sprs32.pt_msr, &sprs32.pt_cr, |
0e061eef KB |
1559 | &sprs32.pt_lr, &sprs32.pt_ctr, &sprs32.pt_xer, |
1560 | &sprs32.pt_fpscr); | |
c11d79f2 | 1561 | |
f1a91342 KB |
1562 | if (tdep->ppc_mq_regnum >= 0) |
1563 | if (register_cached (tdep->ppc_mq_regnum)) | |
822c9732 AC |
1564 | regcache_raw_collect (current_regcache, tdep->ppc_mq_regnum, |
1565 | &sprs32.pt_mq); | |
c11d79f2 KB |
1566 | |
1567 | ptrace32 (PTT_WRITE_SPRS, tid, (int *) &sprs32, 0, NULL); | |
1568 | } | |
1569 | } | |
1570 | } | |
1571 | ||
0fe7bf7b MS |
1572 | /* Store gdb's current view of the register set into the |
1573 | thread/process specified by inferior_ptid. */ | |
c11d79f2 KB |
1574 | |
1575 | static void | |
206d3d3c | 1576 | aix_thread_store_registers (int regno) |
c11d79f2 KB |
1577 | { |
1578 | struct thread_info *thread; | |
1579 | pthdb_tid_t tid; | |
1580 | ||
1581 | if (!PD_TID (inferior_ptid)) | |
206d3d3c | 1582 | base_target.to_store_registers (regno); |
c11d79f2 KB |
1583 | else |
1584 | { | |
1585 | thread = find_thread_pid (inferior_ptid); | |
1586 | tid = thread->private->tid; | |
1587 | ||
1588 | if (tid == PTHDB_INVALID_TID) | |
206d3d3c | 1589 | store_regs_user_thread (thread->private->pdtid); |
c11d79f2 | 1590 | else |
206d3d3c | 1591 | store_regs_kernel_thread (regno, tid); |
c11d79f2 KB |
1592 | } |
1593 | } | |
1594 | ||
0fe7bf7b MS |
1595 | /* Transfer LEN bytes of memory from GDB address MYADDR to target |
1596 | address MEMADDR if WRITE and vice versa otherwise. */ | |
c11d79f2 KB |
1597 | |
1598 | static int | |
206d3d3c KB |
1599 | aix_thread_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
1600 | struct mem_attrib *attrib, | |
1601 | struct target_ops *target) | |
c11d79f2 KB |
1602 | { |
1603 | int n; | |
14fa3751 KB |
1604 | struct cleanup *cleanup = save_inferior_ptid (); |
1605 | ||
1606 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
c8e73a31 AC |
1607 | n = base_target.deprecated_xfer_memory (memaddr, myaddr, len, |
1608 | write, attrib, &base_target); | |
14fa3751 | 1609 | do_cleanups (cleanup); |
c11d79f2 | 1610 | |
c11d79f2 KB |
1611 | return n; |
1612 | } | |
1613 | ||
0fe7bf7b | 1614 | /* Kill and forget about the inferior process. */ |
c11d79f2 KB |
1615 | |
1616 | static void | |
206d3d3c | 1617 | aix_thread_kill (void) |
c11d79f2 | 1618 | { |
14fa3751 KB |
1619 | struct cleanup *cleanup = save_inferior_ptid (); |
1620 | ||
1621 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
206d3d3c | 1622 | base_target.to_kill (); |
14fa3751 | 1623 | do_cleanups (cleanup); |
c11d79f2 KB |
1624 | } |
1625 | ||
0fe7bf7b | 1626 | /* Clean up after the inferior exits. */ |
c11d79f2 KB |
1627 | |
1628 | static void | |
206d3d3c | 1629 | aix_thread_mourn_inferior (void) |
c11d79f2 KB |
1630 | { |
1631 | pd_deactivate (); | |
206d3d3c | 1632 | base_target.to_mourn_inferior (); |
c11d79f2 KB |
1633 | } |
1634 | ||
0fe7bf7b | 1635 | /* Return whether thread PID is still valid. */ |
c11d79f2 KB |
1636 | |
1637 | static int | |
206d3d3c | 1638 | aix_thread_thread_alive (ptid_t ptid) |
c11d79f2 KB |
1639 | { |
1640 | if (!PD_TID (ptid)) | |
206d3d3c | 1641 | return base_target.to_thread_alive (ptid); |
c11d79f2 | 1642 | |
0fe7bf7b MS |
1643 | /* We update the thread list every time the child stops, so all |
1644 | valid threads should be in the thread list. */ | |
c11d79f2 KB |
1645 | return in_thread_list (ptid); |
1646 | } | |
1647 | ||
0fe7bf7b MS |
1648 | /* Return a printable representation of composite PID for use in |
1649 | "info threads" output. */ | |
c11d79f2 KB |
1650 | |
1651 | static char * | |
206d3d3c | 1652 | aix_thread_pid_to_str (ptid_t ptid) |
c11d79f2 KB |
1653 | { |
1654 | static char *ret = NULL; | |
1655 | ||
1656 | if (!PD_TID (ptid)) | |
206d3d3c | 1657 | return base_target.to_pid_to_str (ptid); |
c11d79f2 KB |
1658 | |
1659 | /* Free previous return value; a new one will be allocated by | |
b435e160 | 1660 | xstrprintf(). */ |
c11d79f2 KB |
1661 | xfree (ret); |
1662 | ||
b435e160 | 1663 | ret = xstrprintf ("Thread %ld", ptid_get_tid (ptid)); |
c11d79f2 KB |
1664 | return ret; |
1665 | } | |
1666 | ||
0fe7bf7b MS |
1667 | /* Return a printable representation of extra information about |
1668 | THREAD, for use in "info threads" output. */ | |
c11d79f2 KB |
1669 | |
1670 | static char * | |
206d3d3c | 1671 | aix_thread_extra_thread_info (struct thread_info *thread) |
c11d79f2 KB |
1672 | { |
1673 | struct ui_file *buf; | |
1674 | int status; | |
1675 | pthdb_pthread_t pdtid; | |
1676 | pthdb_tid_t tid; | |
1677 | pthdb_state_t state; | |
1678 | pthdb_suspendstate_t suspendstate; | |
1679 | pthdb_detachstate_t detachstate; | |
1680 | int cancelpend; | |
1681 | long length; | |
1682 | static char *ret = NULL; | |
1683 | ||
1684 | if (!PD_TID (thread->ptid)) | |
1685 | return NULL; | |
1686 | ||
1687 | buf = mem_fileopen (); | |
1688 | ||
1689 | pdtid = thread->private->pdtid; | |
1690 | tid = thread->private->tid; | |
1691 | ||
1692 | if (tid != PTHDB_INVALID_TID) | |
1693 | fprintf_unfiltered (buf, "tid %d", tid); | |
1694 | ||
1695 | status = pthdb_pthread_state (pd_session, pdtid, &state); | |
1696 | if (status != PTHDB_SUCCESS) | |
1697 | state = PST_NOTSUP; | |
1698 | fprintf_unfiltered (buf, ", %s", state2str (state)); | |
1699 | ||
0fe7bf7b MS |
1700 | status = pthdb_pthread_suspendstate (pd_session, pdtid, |
1701 | &suspendstate); | |
c11d79f2 KB |
1702 | if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED) |
1703 | fprintf_unfiltered (buf, ", suspended"); | |
1704 | ||
0fe7bf7b MS |
1705 | status = pthdb_pthread_detachstate (pd_session, pdtid, |
1706 | &detachstate); | |
c11d79f2 KB |
1707 | if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED) |
1708 | fprintf_unfiltered (buf, ", detached"); | |
1709 | ||
1710 | pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend); | |
1711 | if (status == PTHDB_SUCCESS && cancelpend) | |
1712 | fprintf_unfiltered (buf, ", cancel pending"); | |
1713 | ||
1714 | ui_file_write (buf, "", 1); | |
1715 | ||
1716 | xfree (ret); /* Free old buffer. */ | |
1717 | ||
1718 | ret = ui_file_xstrdup (buf, &length); | |
1719 | ui_file_delete (buf); | |
1720 | ||
1721 | return ret; | |
1722 | } | |
1723 | ||
206d3d3c | 1724 | /* Initialize target aix_thread_ops. */ |
c11d79f2 KB |
1725 | |
1726 | static void | |
206d3d3c | 1727 | init_aix_thread_ops (void) |
c11d79f2 | 1728 | { |
206d3d3c KB |
1729 | aix_thread_ops.to_shortname = "aix-threads"; |
1730 | aix_thread_ops.to_longname = "AIX pthread support"; | |
1731 | aix_thread_ops.to_doc = "AIX pthread support"; | |
1732 | ||
1733 | aix_thread_ops.to_attach = aix_thread_attach; | |
1734 | aix_thread_ops.to_detach = aix_thread_detach; | |
1735 | aix_thread_ops.to_resume = aix_thread_resume; | |
1736 | aix_thread_ops.to_wait = aix_thread_wait; | |
1737 | aix_thread_ops.to_fetch_registers = aix_thread_fetch_registers; | |
1738 | aix_thread_ops.to_store_registers = aix_thread_store_registers; | |
c8e73a31 | 1739 | aix_thread_ops.deprecated_xfer_memory = aix_thread_xfer_memory; |
206d3d3c | 1740 | /* No need for aix_thread_ops.to_create_inferior, because we activate thread |
0fe7bf7b | 1741 | debugging when the inferior reaches pd_brk_addr. */ |
206d3d3c KB |
1742 | aix_thread_ops.to_kill = aix_thread_kill; |
1743 | aix_thread_ops.to_mourn_inferior = aix_thread_mourn_inferior; | |
1744 | aix_thread_ops.to_thread_alive = aix_thread_thread_alive; | |
1745 | aix_thread_ops.to_pid_to_str = aix_thread_pid_to_str; | |
1746 | aix_thread_ops.to_extra_thread_info = aix_thread_extra_thread_info; | |
1747 | aix_thread_ops.to_stratum = thread_stratum; | |
1748 | aix_thread_ops.to_magic = OPS_MAGIC; | |
c11d79f2 KB |
1749 | } |
1750 | ||
1751 | /* Module startup initialization function, automagically called by | |
0fe7bf7b | 1752 | init.c. */ |
c11d79f2 KB |
1753 | |
1754 | void | |
1755 | _initialize_aix_thread (void) | |
1756 | { | |
206d3d3c KB |
1757 | init_aix_thread_ops (); |
1758 | add_target (&aix_thread_ops); | |
c11d79f2 | 1759 | |
0fe7bf7b | 1760 | /* Notice when object files get loaded and unloaded. */ |
9a4105ab AC |
1761 | target_new_objfile_chain = deprecated_target_new_objfile_hook; |
1762 | deprecated_target_new_objfile_hook = new_objfile; | |
8e2c28d4 | 1763 | |
cb1a6d5f AC |
1764 | deprecated_add_show_from_set |
1765 | (add_set_cmd ("aix-thread", no_class, var_zinteger, | |
1766 | (char *) &debug_aix_thread, | |
1767 | "Set debugging of AIX thread module.\n" | |
1768 | "Enables printf debugging output.\n", | |
1769 | &setdebuglist), | |
1770 | &showdebuglist); | |
c11d79f2 | 1771 | } |