| 1 | /* Low level interface for debugging AIX 4.3+ pthreads. |
| 2 | |
| 3 | Copyright (C) 1999-2019 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | |
| 22 | /* This module uses the libpthdebug.a library provided by AIX 4.3+ for |
| 23 | debugging pthread applications. |
| 24 | |
| 25 | Some name prefix conventions: |
| 26 | pthdb_ provided by libpthdebug.a |
| 27 | pdc_ callbacks that this module provides to libpthdebug.a |
| 28 | pd_ variables or functions interfacing with libpthdebug.a |
| 29 | |
| 30 | libpthdebug peculiarities: |
| 31 | |
| 32 | - pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but |
| 33 | it's not documented, and after several calls it stops working |
| 34 | and causes other libpthdebug functions to fail. |
| 35 | |
| 36 | - pthdb_tid_pthread() doesn't always work after |
| 37 | pthdb_session_update(), but it does work after cycling through |
| 38 | all threads using pthdb_pthread(). |
| 39 | |
| 40 | */ |
| 41 | |
| 42 | #include "defs.h" |
| 43 | #include "gdbthread.h" |
| 44 | #include "target.h" |
| 45 | #include "inferior.h" |
| 46 | #include "regcache.h" |
| 47 | #include "gdbcmd.h" |
| 48 | #include "ppc-tdep.h" |
| 49 | #include "observable.h" |
| 50 | #include "objfiles.h" |
| 51 | |
| 52 | #include <procinfo.h> |
| 53 | #include <sys/types.h> |
| 54 | #include <sys/ptrace.h> |
| 55 | #include <sys/reg.h> |
| 56 | #include <sched.h> |
| 57 | #include <sys/pthdebug.h> |
| 58 | |
| 59 | #if !HAVE_DECL_GETTHRDS |
| 60 | extern int getthrds (pid_t, struct thrdsinfo64 *, int, tid_t *, int); |
| 61 | #endif |
| 62 | |
| 63 | /* Whether to emit debugging output. */ |
| 64 | static int debug_aix_thread; |
| 65 | |
| 66 | /* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */ |
| 67 | #ifndef PTHDB_VERSION_3 |
| 68 | #define pthdb_tid_t tid_t |
| 69 | #endif |
| 70 | |
| 71 | /* Return whether to treat PID as a debuggable thread id. */ |
| 72 | |
| 73 | #define PD_TID(ptid) (pd_active && ptid.tid () != 0) |
| 74 | |
| 75 | /* pthdb_user_t value that we pass to pthdb functions. 0 causes |
| 76 | PTHDB_BAD_USER errors, so use 1. */ |
| 77 | |
| 78 | #define PD_USER 1 |
| 79 | |
| 80 | /* Success and failure values returned by pthdb callbacks. */ |
| 81 | |
| 82 | #define PDC_SUCCESS PTHDB_SUCCESS |
| 83 | #define PDC_FAILURE PTHDB_CALLBACK |
| 84 | |
| 85 | /* Private data attached to each element in GDB's thread list. */ |
| 86 | |
| 87 | struct aix_thread_info : public private_thread_info |
| 88 | { |
| 89 | pthdb_pthread_t pdtid; /* thread's libpthdebug id */ |
| 90 | pthdb_tid_t tid; /* kernel thread id */ |
| 91 | }; |
| 92 | |
| 93 | /* Return the aix_thread_info attached to THREAD. */ |
| 94 | |
| 95 | static aix_thread_info * |
| 96 | get_aix_thread_info (thread_info *thread) |
| 97 | { |
| 98 | return static_cast<aix_thread_info *> (thread->priv.get ()); |
| 99 | } |
| 100 | |
| 101 | /* Information about a thread of which libpthdebug is aware. */ |
| 102 | |
| 103 | struct pd_thread { |
| 104 | pthdb_pthread_t pdtid; |
| 105 | pthread_t pthid; |
| 106 | pthdb_tid_t tid; |
| 107 | }; |
| 108 | |
| 109 | /* This module's target-specific operations, active while pd_able is true. */ |
| 110 | |
| 111 | static const target_info aix_thread_target_info = { |
| 112 | "aix-threads", |
| 113 | N_("AIX pthread support"), |
| 114 | N_("AIX pthread support") |
| 115 | }; |
| 116 | |
| 117 | class aix_thread_target final : public target_ops |
| 118 | { |
| 119 | public: |
| 120 | const target_info &info () const override |
| 121 | { return aix_thread_target_info; } |
| 122 | |
| 123 | strata stratum () const override { return thread_stratum; } |
| 124 | |
| 125 | void detach (inferior *, int) override; |
| 126 | void resume (ptid_t, int, enum gdb_signal) override; |
| 127 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; |
| 128 | |
| 129 | void fetch_registers (struct regcache *, int) override; |
| 130 | void store_registers (struct regcache *, int) override; |
| 131 | |
| 132 | enum target_xfer_status xfer_partial (enum target_object object, |
| 133 | const char *annex, |
| 134 | gdb_byte *readbuf, |
| 135 | const gdb_byte *writebuf, |
| 136 | ULONGEST offset, ULONGEST len, |
| 137 | ULONGEST *xfered_len) override; |
| 138 | |
| 139 | void mourn_inferior () override; |
| 140 | |
| 141 | bool thread_alive (ptid_t ptid) override; |
| 142 | |
| 143 | const char *pid_to_str (ptid_t) override; |
| 144 | |
| 145 | const char *extra_thread_info (struct thread_info *) override; |
| 146 | |
| 147 | ptid_t get_ada_task_ptid (long lwp, long thread) override; |
| 148 | }; |
| 149 | |
| 150 | static aix_thread_target aix_thread_ops; |
| 151 | |
| 152 | /* Address of the function that libpthread will call when libpthdebug |
| 153 | is ready to be initialized. */ |
| 154 | |
| 155 | static CORE_ADDR pd_brk_addr; |
| 156 | |
| 157 | /* Whether the current application is debuggable by pthdb. */ |
| 158 | |
| 159 | static int pd_able = 0; |
| 160 | |
| 161 | /* Whether a threaded application is being debugged. */ |
| 162 | |
| 163 | static int pd_active = 0; |
| 164 | |
| 165 | /* Whether the current architecture is 64-bit. |
| 166 | Only valid when pd_able is true. */ |
| 167 | |
| 168 | static int arch64; |
| 169 | |
| 170 | /* Forward declarations for pthdb callbacks. */ |
| 171 | |
| 172 | static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int); |
| 173 | static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t); |
| 174 | static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t); |
| 175 | static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid, |
| 176 | unsigned long long flags, |
| 177 | pthdb_context_t *context); |
| 178 | static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid, |
| 179 | unsigned long long flags, |
| 180 | pthdb_context_t *context); |
| 181 | static int pdc_alloc (pthdb_user_t, size_t, void **); |
| 182 | static int pdc_realloc (pthdb_user_t, void *, size_t, void **); |
| 183 | static int pdc_dealloc (pthdb_user_t, void *); |
| 184 | |
| 185 | /* pthdb callbacks. */ |
| 186 | |
| 187 | static pthdb_callbacks_t pd_callbacks = { |
| 188 | pdc_symbol_addrs, |
| 189 | pdc_read_data, |
| 190 | pdc_write_data, |
| 191 | pdc_read_regs, |
| 192 | pdc_write_regs, |
| 193 | pdc_alloc, |
| 194 | pdc_realloc, |
| 195 | pdc_dealloc, |
| 196 | NULL |
| 197 | }; |
| 198 | |
| 199 | /* Current pthdb session. */ |
| 200 | |
| 201 | static pthdb_session_t pd_session; |
| 202 | |
| 203 | /* Return a printable representation of pthdebug function return |
| 204 | STATUS. */ |
| 205 | |
| 206 | static const char * |
| 207 | pd_status2str (int status) |
| 208 | { |
| 209 | switch (status) |
| 210 | { |
| 211 | case PTHDB_SUCCESS: return "SUCCESS"; |
| 212 | case PTHDB_NOSYS: return "NOSYS"; |
| 213 | case PTHDB_NOTSUP: return "NOTSUP"; |
| 214 | case PTHDB_BAD_VERSION: return "BAD_VERSION"; |
| 215 | case PTHDB_BAD_USER: return "BAD_USER"; |
| 216 | case PTHDB_BAD_SESSION: return "BAD_SESSION"; |
| 217 | case PTHDB_BAD_MODE: return "BAD_MODE"; |
| 218 | case PTHDB_BAD_FLAGS: return "BAD_FLAGS"; |
| 219 | case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK"; |
| 220 | case PTHDB_BAD_POINTER: return "BAD_POINTER"; |
| 221 | case PTHDB_BAD_CMD: return "BAD_CMD"; |
| 222 | case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD"; |
| 223 | case PTHDB_BAD_ATTR: return "BAD_ATTR"; |
| 224 | case PTHDB_BAD_MUTEX: return "BAD_MUTEX"; |
| 225 | case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR"; |
| 226 | case PTHDB_BAD_COND: return "BAD_COND"; |
| 227 | case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR"; |
| 228 | case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK"; |
| 229 | case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR"; |
| 230 | case PTHDB_BAD_KEY: return "BAD_KEY"; |
| 231 | case PTHDB_BAD_PTID: return "BAD_PTID"; |
| 232 | case PTHDB_BAD_TID: return "BAD_TID"; |
| 233 | case PTHDB_CALLBACK: return "CALLBACK"; |
| 234 | case PTHDB_CONTEXT: return "CONTEXT"; |
| 235 | case PTHDB_HELD: return "HELD"; |
| 236 | case PTHDB_NOT_HELD: return "NOT_HELD"; |
| 237 | case PTHDB_MEMORY: return "MEMORY"; |
| 238 | case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED"; |
| 239 | case PTHDB_SYMBOL: return "SYMBOL"; |
| 240 | case PTHDB_NOT_AVAIL: return "NOT_AVAIL"; |
| 241 | case PTHDB_INTERNAL: return "INTERNAL"; |
| 242 | default: return "UNKNOWN"; |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | /* A call to ptrace(REQ, ID, ...) just returned RET. Check for |
| 247 | exceptional conditions and either return nonlocally or else return |
| 248 | 1 for success and 0 for failure. */ |
| 249 | |
| 250 | static int |
| 251 | ptrace_check (int req, int id, int ret) |
| 252 | { |
| 253 | if (ret == 0 && !errno) |
| 254 | return 1; |
| 255 | |
| 256 | /* According to ptrace(2), ptrace may fail with EPERM if "the |
| 257 | Identifier parameter corresponds to a kernel thread which is |
| 258 | stopped in kernel mode and whose computational state cannot be |
| 259 | read or written." This happens quite often with register reads. */ |
| 260 | |
| 261 | switch (req) |
| 262 | { |
| 263 | case PTT_READ_GPRS: |
| 264 | case PTT_READ_FPRS: |
| 265 | case PTT_READ_SPRS: |
| 266 | if (ret == -1 && errno == EPERM) |
| 267 | { |
| 268 | if (debug_aix_thread) |
| 269 | fprintf_unfiltered (gdb_stdlog, |
| 270 | "ptrace (%d, %d) = %d (errno = %d)\n", |
| 271 | req, id, ret, errno); |
| 272 | return ret == -1 ? 0 : 1; |
| 273 | } |
| 274 | break; |
| 275 | } |
| 276 | error (_("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)"), |
| 277 | req, id, ret, errno, safe_strerror (errno)); |
| 278 | return 0; /* Not reached. */ |
| 279 | } |
| 280 | |
| 281 | /* Call ptracex (REQ, ID, ADDR, DATA, BUF) or |
| 282 | ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64. |
| 283 | Return success. */ |
| 284 | |
| 285 | #ifdef HAVE_PTRACE64 |
| 286 | # define ptracex(request, pid, addr, data, buf) \ |
| 287 | ptrace64 (request, pid, addr, data, buf) |
| 288 | #endif |
| 289 | |
| 290 | static int |
| 291 | ptrace64aix (int req, int id, long long addr, int data, int *buf) |
| 292 | { |
| 293 | errno = 0; |
| 294 | return ptrace_check (req, id, ptracex (req, id, addr, data, buf)); |
| 295 | } |
| 296 | |
| 297 | /* Call ptrace (REQ, ID, ADDR, DATA, BUF) or |
| 298 | ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64. |
| 299 | Return success. */ |
| 300 | |
| 301 | #ifdef HAVE_PTRACE64 |
| 302 | # define ptrace(request, pid, addr, data, buf) \ |
| 303 | ptrace64 (request, pid, addr, data, buf) |
| 304 | # define addr_ptr long long |
| 305 | #else |
| 306 | # define addr_ptr int * |
| 307 | #endif |
| 308 | |
| 309 | static int |
| 310 | ptrace32 (int req, int id, addr_ptr addr, int data, int *buf) |
| 311 | { |
| 312 | errno = 0; |
| 313 | return ptrace_check (req, id, |
| 314 | ptrace (req, id, addr, data, buf)); |
| 315 | } |
| 316 | |
| 317 | /* If *PIDP is a composite process/thread id, convert it to a |
| 318 | process id. */ |
| 319 | |
| 320 | static void |
| 321 | pid_to_prc (ptid_t *ptidp) |
| 322 | { |
| 323 | ptid_t ptid; |
| 324 | |
| 325 | ptid = *ptidp; |
| 326 | if (PD_TID (ptid)) |
| 327 | *ptidp = ptid_t (ptid.pid ()); |
| 328 | } |
| 329 | |
| 330 | /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to |
| 331 | the address of SYMBOLS[<i>].name. */ |
| 332 | |
| 333 | static int |
| 334 | pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) |
| 335 | { |
| 336 | struct bound_minimal_symbol ms; |
| 337 | int i; |
| 338 | char *name; |
| 339 | |
| 340 | if (debug_aix_thread) |
| 341 | fprintf_unfiltered (gdb_stdlog, |
| 342 | "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n", |
| 343 | user, (long) symbols, count); |
| 344 | |
| 345 | for (i = 0; i < count; i++) |
| 346 | { |
| 347 | name = symbols[i].name; |
| 348 | if (debug_aix_thread) |
| 349 | fprintf_unfiltered (gdb_stdlog, |
| 350 | " symbols[%d].name = \"%s\"\n", i, name); |
| 351 | |
| 352 | if (!*name) |
| 353 | symbols[i].addr = 0; |
| 354 | else |
| 355 | { |
| 356 | ms = lookup_minimal_symbol (name, NULL, NULL); |
| 357 | if (ms.minsym == NULL) |
| 358 | { |
| 359 | if (debug_aix_thread) |
| 360 | fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n"); |
| 361 | return PDC_FAILURE; |
| 362 | } |
| 363 | symbols[i].addr = BMSYMBOL_VALUE_ADDRESS (ms); |
| 364 | } |
| 365 | if (debug_aix_thread) |
| 366 | fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = %s\n", |
| 367 | i, hex_string (symbols[i].addr)); |
| 368 | } |
| 369 | if (debug_aix_thread) |
| 370 | fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n"); |
| 371 | return PDC_SUCCESS; |
| 372 | } |
| 373 | |
| 374 | /* Read registers call back function should be able to read the |
| 375 | context information of a debuggee kernel thread from an active |
| 376 | process or from a core file. The information should be formatted |
| 377 | in context64 form for both 32-bit and 64-bit process. |
| 378 | If successful return 0, else non-zero is returned. */ |
| 379 | |
| 380 | static int |
| 381 | pdc_read_regs (pthdb_user_t user, |
| 382 | pthdb_tid_t tid, |
| 383 | unsigned long long flags, |
| 384 | pthdb_context_t *context) |
| 385 | { |
| 386 | /* This function doesn't appear to be used, so we could probably |
| 387 | just return 0 here. HOWEVER, if it is not defined, the OS will |
| 388 | complain and several thread debug functions will fail. In case |
| 389 | this is needed, I have implemented what I think it should do, |
| 390 | however this code is untested. */ |
| 391 | |
| 392 | uint64_t gprs64[ppc_num_gprs]; |
| 393 | uint32_t gprs32[ppc_num_gprs]; |
| 394 | double fprs[ppc_num_fprs]; |
| 395 | struct ptxsprs sprs64; |
| 396 | struct ptsprs sprs32; |
| 397 | |
| 398 | if (debug_aix_thread) |
| 399 | fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n", |
| 400 | (int) tid, hex_string (flags)); |
| 401 | |
| 402 | /* General-purpose registers. */ |
| 403 | if (flags & PTHDB_FLAG_GPRS) |
| 404 | { |
| 405 | if (arch64) |
| 406 | { |
| 407 | if (!ptrace64aix (PTT_READ_GPRS, tid, |
| 408 | (unsigned long) gprs64, 0, NULL)) |
| 409 | memset (gprs64, 0, sizeof (gprs64)); |
| 410 | memcpy (context->gpr, gprs64, sizeof(gprs64)); |
| 411 | } |
| 412 | else |
| 413 | { |
| 414 | if (!ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL)) |
| 415 | memset (gprs32, 0, sizeof (gprs32)); |
| 416 | memcpy (context->gpr, gprs32, sizeof(gprs32)); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | /* Floating-point registers. */ |
| 421 | if (flags & PTHDB_FLAG_FPRS) |
| 422 | { |
| 423 | if (!ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL)) |
| 424 | memset (fprs, 0, sizeof (fprs)); |
| 425 | memcpy (context->fpr, fprs, sizeof(fprs)); |
| 426 | } |
| 427 | |
| 428 | /* Special-purpose registers. */ |
| 429 | if (flags & PTHDB_FLAG_SPRS) |
| 430 | { |
| 431 | if (arch64) |
| 432 | { |
| 433 | if (!ptrace64aix (PTT_READ_SPRS, tid, |
| 434 | (unsigned long) &sprs64, 0, NULL)) |
| 435 | memset (&sprs64, 0, sizeof (sprs64)); |
| 436 | memcpy (&context->msr, &sprs64, sizeof(sprs64)); |
| 437 | } |
| 438 | else |
| 439 | { |
| 440 | if (!ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL)) |
| 441 | memset (&sprs32, 0, sizeof (sprs32)); |
| 442 | memcpy (&context->msr, &sprs32, sizeof(sprs32)); |
| 443 | } |
| 444 | } |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | /* Write register function should be able to write requested context |
| 449 | information to specified debuggee's kernel thread id. |
| 450 | If successful return 0, else non-zero is returned. */ |
| 451 | |
| 452 | static int |
| 453 | pdc_write_regs (pthdb_user_t user, |
| 454 | pthdb_tid_t tid, |
| 455 | unsigned long long flags, |
| 456 | pthdb_context_t *context) |
| 457 | { |
| 458 | /* This function doesn't appear to be used, so we could probably |
| 459 | just return 0 here. HOWEVER, if it is not defined, the OS will |
| 460 | complain and several thread debug functions will fail. In case |
| 461 | this is needed, I have implemented what I think it should do, |
| 462 | however this code is untested. */ |
| 463 | |
| 464 | if (debug_aix_thread) |
| 465 | fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n", |
| 466 | (int) tid, hex_string (flags)); |
| 467 | |
| 468 | /* General-purpose registers. */ |
| 469 | if (flags & PTHDB_FLAG_GPRS) |
| 470 | { |
| 471 | if (arch64) |
| 472 | ptrace64aix (PTT_WRITE_GPRS, tid, |
| 473 | (unsigned long) context->gpr, 0, NULL); |
| 474 | else |
| 475 | ptrace32 (PTT_WRITE_GPRS, tid, (uintptr_t) context->gpr, 0, NULL); |
| 476 | } |
| 477 | |
| 478 | /* Floating-point registers. */ |
| 479 | if (flags & PTHDB_FLAG_FPRS) |
| 480 | { |
| 481 | ptrace32 (PTT_WRITE_FPRS, tid, (uintptr_t) context->fpr, 0, NULL); |
| 482 | } |
| 483 | |
| 484 | /* Special-purpose registers. */ |
| 485 | if (flags & PTHDB_FLAG_SPRS) |
| 486 | { |
| 487 | if (arch64) |
| 488 | { |
| 489 | ptrace64aix (PTT_WRITE_SPRS, tid, |
| 490 | (unsigned long) &context->msr, 0, NULL); |
| 491 | } |
| 492 | else |
| 493 | { |
| 494 | ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &context->msr, 0, NULL); |
| 495 | } |
| 496 | } |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | /* pthdb callback: read LEN bytes from process ADDR into BUF. */ |
| 501 | |
| 502 | static int |
| 503 | pdc_read_data (pthdb_user_t user, void *buf, |
| 504 | pthdb_addr_t addr, size_t len) |
| 505 | { |
| 506 | int status, ret; |
| 507 | |
| 508 | if (debug_aix_thread) |
| 509 | fprintf_unfiltered (gdb_stdlog, |
| 510 | "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
| 511 | user, (long) buf, hex_string (addr), len); |
| 512 | |
| 513 | status = target_read_memory (addr, (gdb_byte *) buf, len); |
| 514 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; |
| 515 | |
| 516 | if (debug_aix_thread) |
| 517 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", |
| 518 | status, pd_status2str (ret)); |
| 519 | return ret; |
| 520 | } |
| 521 | |
| 522 | /* pthdb callback: write LEN bytes from BUF to process ADDR. */ |
| 523 | |
| 524 | static int |
| 525 | pdc_write_data (pthdb_user_t user, void *buf, |
| 526 | pthdb_addr_t addr, size_t len) |
| 527 | { |
| 528 | int status, ret; |
| 529 | |
| 530 | if (debug_aix_thread) |
| 531 | fprintf_unfiltered (gdb_stdlog, |
| 532 | "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
| 533 | user, (long) buf, hex_string (addr), len); |
| 534 | |
| 535 | status = target_write_memory (addr, (gdb_byte *) buf, len); |
| 536 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; |
| 537 | |
| 538 | if (debug_aix_thread) |
| 539 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", status, |
| 540 | pd_status2str (ret)); |
| 541 | return ret; |
| 542 | } |
| 543 | |
| 544 | /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it |
| 545 | in BUFP. */ |
| 546 | |
| 547 | static int |
| 548 | pdc_alloc (pthdb_user_t user, size_t len, void **bufp) |
| 549 | { |
| 550 | if (debug_aix_thread) |
| 551 | fprintf_unfiltered (gdb_stdlog, |
| 552 | "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n", |
| 553 | user, len, (long) bufp); |
| 554 | *bufp = xmalloc (len); |
| 555 | if (debug_aix_thread) |
| 556 | fprintf_unfiltered (gdb_stdlog, |
| 557 | " malloc returned 0x%lx\n", (long) *bufp); |
| 558 | |
| 559 | /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never |
| 560 | be returned. */ |
| 561 | |
| 562 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
| 563 | } |
| 564 | |
| 565 | /* pthdb callback: reallocate BUF, which was allocated by the alloc or |
| 566 | realloc callback, so that it contains LEN bytes, and store a |
| 567 | pointer to the result in BUFP. */ |
| 568 | |
| 569 | static int |
| 570 | pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp) |
| 571 | { |
| 572 | if (debug_aix_thread) |
| 573 | fprintf_unfiltered (gdb_stdlog, |
| 574 | "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n", |
| 575 | user, (long) buf, len, (long) bufp); |
| 576 | *bufp = xrealloc (buf, len); |
| 577 | if (debug_aix_thread) |
| 578 | fprintf_unfiltered (gdb_stdlog, |
| 579 | " realloc returned 0x%lx\n", (long) *bufp); |
| 580 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
| 581 | } |
| 582 | |
| 583 | /* pthdb callback: free BUF, which was allocated by the alloc or |
| 584 | realloc callback. */ |
| 585 | |
| 586 | static int |
| 587 | pdc_dealloc (pthdb_user_t user, void *buf) |
| 588 | { |
| 589 | if (debug_aix_thread) |
| 590 | fprintf_unfiltered (gdb_stdlog, |
| 591 | "pdc_free (user = %ld, buf = 0x%lx)\n", user, |
| 592 | (long) buf); |
| 593 | xfree (buf); |
| 594 | return PDC_SUCCESS; |
| 595 | } |
| 596 | |
| 597 | /* Return a printable representation of pthread STATE. */ |
| 598 | |
| 599 | static char * |
| 600 | state2str (pthdb_state_t state) |
| 601 | { |
| 602 | switch (state) |
| 603 | { |
| 604 | case PST_IDLE: |
| 605 | /* i18n: Like "Thread-Id %d, [state] idle" */ |
| 606 | return _("idle"); /* being created */ |
| 607 | case PST_RUN: |
| 608 | /* i18n: Like "Thread-Id %d, [state] running" */ |
| 609 | return _("running"); /* running */ |
| 610 | case PST_SLEEP: |
| 611 | /* i18n: Like "Thread-Id %d, [state] sleeping" */ |
| 612 | return _("sleeping"); /* awaiting an event */ |
| 613 | case PST_READY: |
| 614 | /* i18n: Like "Thread-Id %d, [state] ready" */ |
| 615 | return _("ready"); /* runnable */ |
| 616 | case PST_TERM: |
| 617 | /* i18n: Like "Thread-Id %d, [state] finished" */ |
| 618 | return _("finished"); /* awaiting a join/detach */ |
| 619 | default: |
| 620 | /* i18n: Like "Thread-Id %d, [state] unknown" */ |
| 621 | return _("unknown"); |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | /* qsort() comparison function for sorting pd_thread structs by pthid. */ |
| 626 | |
| 627 | static int |
| 628 | pcmp (const void *p1v, const void *p2v) |
| 629 | { |
| 630 | struct pd_thread *p1 = (struct pd_thread *) p1v; |
| 631 | struct pd_thread *p2 = (struct pd_thread *) p2v; |
| 632 | return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid; |
| 633 | } |
| 634 | |
| 635 | /* iterate_over_threads() callback for counting GDB threads. |
| 636 | |
| 637 | Do not count the main thread (whose tid is zero). This matches |
| 638 | the list of threads provided by the pthreaddebug library, which |
| 639 | does not include that main thread either, and thus allows us |
| 640 | to compare the two lists. */ |
| 641 | |
| 642 | static int |
| 643 | giter_count (struct thread_info *thread, void *countp) |
| 644 | { |
| 645 | if (PD_TID (thread->ptid)) |
| 646 | (*(int *) countp)++; |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | /* iterate_over_threads() callback for accumulating GDB thread pids. |
| 651 | |
| 652 | Do not include the main thread (whose tid is zero). This matches |
| 653 | the list of threads provided by the pthreaddebug library, which |
| 654 | does not include that main thread either, and thus allows us |
| 655 | to compare the two lists. */ |
| 656 | |
| 657 | static int |
| 658 | giter_accum (struct thread_info *thread, void *bufp) |
| 659 | { |
| 660 | if (PD_TID (thread->ptid)) |
| 661 | { |
| 662 | **(struct thread_info ***) bufp = thread; |
| 663 | (*(struct thread_info ***) bufp)++; |
| 664 | } |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | /* ptid comparison function */ |
| 669 | |
| 670 | static int |
| 671 | ptid_cmp (ptid_t ptid1, ptid_t ptid2) |
| 672 | { |
| 673 | int pid1, pid2; |
| 674 | |
| 675 | if (ptid1.pid () < ptid2.pid ()) |
| 676 | return -1; |
| 677 | else if (ptid1.pid () > ptid2.pid ()) |
| 678 | return 1; |
| 679 | else if (ptid1.tid () < ptid2.tid ()) |
| 680 | return -1; |
| 681 | else if (ptid1.tid () > ptid2.tid ()) |
| 682 | return 1; |
| 683 | else if (ptid1.lwp () < ptid2.lwp ()) |
| 684 | return -1; |
| 685 | else if (ptid1.lwp () > ptid2.lwp ()) |
| 686 | return 1; |
| 687 | else |
| 688 | return 0; |
| 689 | } |
| 690 | |
| 691 | /* qsort() comparison function for sorting thread_info structs by pid. */ |
| 692 | |
| 693 | static int |
| 694 | gcmp (const void *t1v, const void *t2v) |
| 695 | { |
| 696 | struct thread_info *t1 = *(struct thread_info **) t1v; |
| 697 | struct thread_info *t2 = *(struct thread_info **) t2v; |
| 698 | return ptid_cmp (t1->ptid, t2->ptid); |
| 699 | } |
| 700 | |
| 701 | /* Search through the list of all kernel threads for the thread |
| 702 | that has stopped on a SIGTRAP signal, and return its TID. |
| 703 | Return 0 if none found. */ |
| 704 | |
| 705 | static pthdb_tid_t |
| 706 | get_signaled_thread (void) |
| 707 | { |
| 708 | struct thrdsinfo64 thrinf; |
| 709 | tid_t ktid = 0; |
| 710 | int result = 0; |
| 711 | |
| 712 | while (1) |
| 713 | { |
| 714 | if (getthrds (inferior_ptid.pid (), &thrinf, |
| 715 | sizeof (thrinf), &ktid, 1) != 1) |
| 716 | break; |
| 717 | |
| 718 | if (thrinf.ti_cursig == SIGTRAP) |
| 719 | return thrinf.ti_tid; |
| 720 | } |
| 721 | |
| 722 | /* Didn't find any thread stopped on a SIGTRAP signal. */ |
| 723 | return 0; |
| 724 | } |
| 725 | |
| 726 | /* Synchronize GDB's thread list with libpthdebug's. |
| 727 | |
| 728 | There are some benefits of doing this every time the inferior stops: |
| 729 | |
| 730 | - allows users to run thread-specific commands without needing to |
| 731 | run "info threads" first |
| 732 | |
| 733 | - helps pthdb_tid_pthread() work properly (see "libpthdebug |
| 734 | peculiarities" at the top of this module) |
| 735 | |
| 736 | - simplifies the demands placed on libpthdebug, which seems to |
| 737 | have difficulty with certain call patterns */ |
| 738 | |
| 739 | static void |
| 740 | sync_threadlists (void) |
| 741 | { |
| 742 | int cmd, status, infpid; |
| 743 | int pcount, psize, pi, gcount, gi; |
| 744 | struct pd_thread *pbuf; |
| 745 | struct thread_info **gbuf, **g, *thread; |
| 746 | pthdb_pthread_t pdtid; |
| 747 | pthread_t pthid; |
| 748 | pthdb_tid_t tid; |
| 749 | |
| 750 | /* Accumulate an array of libpthdebug threads sorted by pthread id. */ |
| 751 | |
| 752 | pcount = 0; |
| 753 | psize = 1; |
| 754 | pbuf = XNEWVEC (struct pd_thread, psize); |
| 755 | |
| 756 | for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT) |
| 757 | { |
| 758 | status = pthdb_pthread (pd_session, &pdtid, cmd); |
| 759 | if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD) |
| 760 | break; |
| 761 | |
| 762 | status = pthdb_pthread_ptid (pd_session, pdtid, &pthid); |
| 763 | if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID) |
| 764 | continue; |
| 765 | |
| 766 | if (pcount == psize) |
| 767 | { |
| 768 | psize *= 2; |
| 769 | pbuf = (struct pd_thread *) xrealloc (pbuf, |
| 770 | psize * sizeof *pbuf); |
| 771 | } |
| 772 | pbuf[pcount].pdtid = pdtid; |
| 773 | pbuf[pcount].pthid = pthid; |
| 774 | pcount++; |
| 775 | } |
| 776 | |
| 777 | for (pi = 0; pi < pcount; pi++) |
| 778 | { |
| 779 | status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid); |
| 780 | if (status != PTHDB_SUCCESS) |
| 781 | tid = PTHDB_INVALID_TID; |
| 782 | pbuf[pi].tid = tid; |
| 783 | } |
| 784 | |
| 785 | qsort (pbuf, pcount, sizeof *pbuf, pcmp); |
| 786 | |
| 787 | /* Accumulate an array of GDB threads sorted by pid. */ |
| 788 | |
| 789 | gcount = 0; |
| 790 | iterate_over_threads (giter_count, &gcount); |
| 791 | g = gbuf = XNEWVEC (struct thread_info *, gcount); |
| 792 | iterate_over_threads (giter_accum, &g); |
| 793 | qsort (gbuf, gcount, sizeof *gbuf, gcmp); |
| 794 | |
| 795 | /* Apply differences between the two arrays to GDB's thread list. */ |
| 796 | |
| 797 | infpid = inferior_ptid.pid (); |
| 798 | for (pi = gi = 0; pi < pcount || gi < gcount;) |
| 799 | { |
| 800 | if (pi == pcount) |
| 801 | { |
| 802 | delete_thread (gbuf[gi]); |
| 803 | gi++; |
| 804 | } |
| 805 | else if (gi == gcount) |
| 806 | { |
| 807 | aix_thread_info *priv = new aix_thread_info; |
| 808 | priv->pdtid = pbuf[pi].pdtid; |
| 809 | priv->tid = pbuf[pi].tid; |
| 810 | |
| 811 | thread = add_thread_with_info (ptid_t (infpid, 0, pbuf[pi].pthid), priv); |
| 812 | |
| 813 | pi++; |
| 814 | } |
| 815 | else |
| 816 | { |
| 817 | ptid_t pptid, gptid; |
| 818 | int cmp_result; |
| 819 | |
| 820 | pptid = ptid_t (infpid, 0, pbuf[pi].pthid); |
| 821 | gptid = gbuf[gi]->ptid; |
| 822 | pdtid = pbuf[pi].pdtid; |
| 823 | tid = pbuf[pi].tid; |
| 824 | |
| 825 | cmp_result = ptid_cmp (pptid, gptid); |
| 826 | |
| 827 | if (cmp_result == 0) |
| 828 | { |
| 829 | aix_thread_info *priv = get_aix_thread_info (gbuf[gi]); |
| 830 | |
| 831 | priv->pdtid = pdtid; |
| 832 | priv->tid = tid; |
| 833 | pi++; |
| 834 | gi++; |
| 835 | } |
| 836 | else if (cmp_result > 0) |
| 837 | { |
| 838 | delete_thread (gbuf[gi]); |
| 839 | gi++; |
| 840 | } |
| 841 | else |
| 842 | { |
| 843 | thread = add_thread (pptid); |
| 844 | |
| 845 | aix_thread_info *priv = new aix_thread_info; |
| 846 | thread->priv.reset (priv); |
| 847 | priv->pdtid = pdtid; |
| 848 | priv->tid = tid; |
| 849 | pi++; |
| 850 | } |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | xfree (pbuf); |
| 855 | xfree (gbuf); |
| 856 | } |
| 857 | |
| 858 | /* Iterate_over_threads() callback for locating a thread, using |
| 859 | the TID of its associated kernel thread. */ |
| 860 | |
| 861 | static int |
| 862 | iter_tid (struct thread_info *thread, void *tidp) |
| 863 | { |
| 864 | const pthdb_tid_t tid = *(pthdb_tid_t *)tidp; |
| 865 | aix_thread_info *priv = get_aix_thread_info (thread); |
| 866 | |
| 867 | return priv->tid == tid; |
| 868 | } |
| 869 | |
| 870 | /* Synchronize libpthdebug's state with the inferior and with GDB, |
| 871 | generate a composite process/thread <pid> for the current thread, |
| 872 | set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */ |
| 873 | |
| 874 | static ptid_t |
| 875 | pd_update (int set_infpid) |
| 876 | { |
| 877 | int status; |
| 878 | ptid_t ptid; |
| 879 | pthdb_tid_t tid; |
| 880 | struct thread_info *thread = NULL; |
| 881 | |
| 882 | if (!pd_active) |
| 883 | return inferior_ptid; |
| 884 | |
| 885 | status = pthdb_session_update (pd_session); |
| 886 | if (status != PTHDB_SUCCESS) |
| 887 | return inferior_ptid; |
| 888 | |
| 889 | sync_threadlists (); |
| 890 | |
| 891 | /* Define "current thread" as one that just received a trap signal. */ |
| 892 | |
| 893 | tid = get_signaled_thread (); |
| 894 | if (tid != 0) |
| 895 | thread = iterate_over_threads (iter_tid, &tid); |
| 896 | if (!thread) |
| 897 | ptid = inferior_ptid; |
| 898 | else |
| 899 | { |
| 900 | ptid = thread->ptid; |
| 901 | if (set_infpid) |
| 902 | inferior_ptid = ptid; |
| 903 | } |
| 904 | return ptid; |
| 905 | } |
| 906 | |
| 907 | /* Try to start debugging threads in the current process. |
| 908 | If successful and SET_INFPID, set inferior_ptid to reflect the |
| 909 | current thread. */ |
| 910 | |
| 911 | static ptid_t |
| 912 | pd_activate (int set_infpid) |
| 913 | { |
| 914 | int status; |
| 915 | |
| 916 | status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT, |
| 917 | PTHDB_FLAG_REGS, &pd_callbacks, |
| 918 | &pd_session); |
| 919 | if (status != PTHDB_SUCCESS) |
| 920 | { |
| 921 | return inferior_ptid; |
| 922 | } |
| 923 | pd_active = 1; |
| 924 | return pd_update (set_infpid); |
| 925 | } |
| 926 | |
| 927 | /* Undo the effects of pd_activate(). */ |
| 928 | |
| 929 | static void |
| 930 | pd_deactivate (void) |
| 931 | { |
| 932 | if (!pd_active) |
| 933 | return; |
| 934 | pthdb_session_destroy (pd_session); |
| 935 | |
| 936 | pid_to_prc (&inferior_ptid); |
| 937 | pd_active = 0; |
| 938 | } |
| 939 | |
| 940 | /* An object file has just been loaded. Check whether the current |
| 941 | application is pthreaded, and if so, prepare for thread debugging. */ |
| 942 | |
| 943 | static void |
| 944 | pd_enable (void) |
| 945 | { |
| 946 | int status; |
| 947 | char *stub_name; |
| 948 | struct bound_minimal_symbol ms; |
| 949 | |
| 950 | /* Don't initialize twice. */ |
| 951 | if (pd_able) |
| 952 | return; |
| 953 | |
| 954 | /* Check application word size. */ |
| 955 | arch64 = register_size (target_gdbarch (), 0) == 8; |
| 956 | |
| 957 | /* Check whether the application is pthreaded. */ |
| 958 | stub_name = NULL; |
| 959 | status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS, |
| 960 | &pd_callbacks, &stub_name); |
| 961 | if ((status != PTHDB_SUCCESS |
| 962 | && status != PTHDB_NOT_PTHREADED) || !stub_name) |
| 963 | return; |
| 964 | |
| 965 | /* Set a breakpoint on the returned stub function. */ |
| 966 | ms = lookup_minimal_symbol (stub_name, NULL, NULL); |
| 967 | if (ms.minsym == NULL) |
| 968 | return; |
| 969 | pd_brk_addr = BMSYMBOL_VALUE_ADDRESS (ms); |
| 970 | if (!create_thread_event_breakpoint (target_gdbarch (), pd_brk_addr)) |
| 971 | return; |
| 972 | |
| 973 | /* Prepare for thread debugging. */ |
| 974 | push_target (&aix_thread_ops); |
| 975 | pd_able = 1; |
| 976 | |
| 977 | /* If we're debugging a core file or an attached inferior, the |
| 978 | pthread library may already have been initialized, so try to |
| 979 | activate thread debugging. */ |
| 980 | pd_activate (1); |
| 981 | } |
| 982 | |
| 983 | /* Undo the effects of pd_enable(). */ |
| 984 | |
| 985 | static void |
| 986 | pd_disable (void) |
| 987 | { |
| 988 | if (!pd_able) |
| 989 | return; |
| 990 | if (pd_active) |
| 991 | pd_deactivate (); |
| 992 | pd_able = 0; |
| 993 | unpush_target (&aix_thread_ops); |
| 994 | } |
| 995 | |
| 996 | /* new_objfile observer callback. |
| 997 | |
| 998 | If OBJFILE is non-null, check whether a threaded application is |
| 999 | being debugged, and if so, prepare for thread debugging. |
| 1000 | |
| 1001 | If OBJFILE is null, stop debugging threads. */ |
| 1002 | |
| 1003 | static void |
| 1004 | new_objfile (struct objfile *objfile) |
| 1005 | { |
| 1006 | if (objfile) |
| 1007 | pd_enable (); |
| 1008 | else |
| 1009 | pd_disable (); |
| 1010 | } |
| 1011 | |
| 1012 | /* Attach to process specified by ARGS. */ |
| 1013 | |
| 1014 | static void |
| 1015 | aix_thread_inferior_created (struct target_ops *ops, int from_tty) |
| 1016 | { |
| 1017 | pd_enable (); |
| 1018 | } |
| 1019 | |
| 1020 | /* Detach from the process attached to by aix_thread_attach(). */ |
| 1021 | |
| 1022 | void |
| 1023 | aix_thread_target::detach (inferior *inf, int from_tty) |
| 1024 | { |
| 1025 | target_ops *beneath = this->beneath (); |
| 1026 | |
| 1027 | pd_disable (); |
| 1028 | beneath->detach (inf, from_tty); |
| 1029 | } |
| 1030 | |
| 1031 | /* Tell the inferior process to continue running thread PID if != -1 |
| 1032 | and all threads otherwise. */ |
| 1033 | |
| 1034 | void |
| 1035 | aix_thread_target::resume (ptid_t ptid, int step, enum gdb_signal sig) |
| 1036 | { |
| 1037 | struct thread_info *thread; |
| 1038 | pthdb_tid_t tid[2]; |
| 1039 | |
| 1040 | if (!PD_TID (ptid)) |
| 1041 | { |
| 1042 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| 1043 | |
| 1044 | inferior_ptid = ptid_t (inferior_ptid.pid ()); |
| 1045 | beneath ()->resume (ptid, step, sig); |
| 1046 | } |
| 1047 | else |
| 1048 | { |
| 1049 | thread = find_thread_ptid (ptid); |
| 1050 | if (!thread) |
| 1051 | error (_("aix-thread resume: unknown pthread %ld"), |
| 1052 | ptid.lwp ()); |
| 1053 | |
| 1054 | aix_thread_info *priv = get_aix_thread_info (thread); |
| 1055 | |
| 1056 | tid[0] = priv->tid; |
| 1057 | if (tid[0] == PTHDB_INVALID_TID) |
| 1058 | error (_("aix-thread resume: no tid for pthread %ld"), |
| 1059 | ptid.lwp ()); |
| 1060 | tid[1] = 0; |
| 1061 | |
| 1062 | if (arch64) |
| 1063 | ptrace64aix (PTT_CONTINUE, tid[0], (long long) 1, |
| 1064 | gdb_signal_to_host (sig), (PTRACE_TYPE_ARG5) tid); |
| 1065 | else |
| 1066 | ptrace32 (PTT_CONTINUE, tid[0], (addr_ptr) 1, |
| 1067 | gdb_signal_to_host (sig), (PTRACE_TYPE_ARG5) tid); |
| 1068 | } |
| 1069 | } |
| 1070 | |
| 1071 | /* Wait for thread/process ID if != -1 or for any thread otherwise. |
| 1072 | If an error occurs, return -1, else return the pid of the stopped |
| 1073 | thread. */ |
| 1074 | |
| 1075 | ptid_t |
| 1076 | aix_thread_target::wait (ptid_t ptid, struct target_waitstatus *status, |
| 1077 | int options) |
| 1078 | { |
| 1079 | { |
| 1080 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| 1081 | |
| 1082 | pid_to_prc (&ptid); |
| 1083 | |
| 1084 | inferior_ptid = ptid_t (inferior_ptid.pid ()); |
| 1085 | ptid = beneath ()->wait (ptid, status, options); |
| 1086 | } |
| 1087 | |
| 1088 | if (ptid.pid () == -1) |
| 1089 | return ptid_t (-1); |
| 1090 | |
| 1091 | /* Check whether libpthdebug might be ready to be initialized. */ |
| 1092 | if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED |
| 1093 | && status->value.sig == GDB_SIGNAL_TRAP) |
| 1094 | { |
| 1095 | struct regcache *regcache = get_thread_regcache (ptid); |
| 1096 | struct gdbarch *gdbarch = regcache->arch (); |
| 1097 | |
| 1098 | if (regcache_read_pc (regcache) |
| 1099 | - gdbarch_decr_pc_after_break (gdbarch) == pd_brk_addr) |
| 1100 | return pd_activate (0); |
| 1101 | } |
| 1102 | |
| 1103 | return pd_update (0); |
| 1104 | } |
| 1105 | |
| 1106 | /* Record that the 64-bit general-purpose registers contain VALS. */ |
| 1107 | |
| 1108 | static void |
| 1109 | supply_gprs64 (struct regcache *regcache, uint64_t *vals) |
| 1110 | { |
| 1111 | struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| 1112 | int regno; |
| 1113 | |
| 1114 | for (regno = 0; regno < ppc_num_gprs; regno++) |
| 1115 | regcache->raw_supply (tdep->ppc_gp0_regnum + regno, |
| 1116 | (char *) (vals + regno)); |
| 1117 | } |
| 1118 | |
| 1119 | /* Record that 32-bit register REGNO contains VAL. */ |
| 1120 | |
| 1121 | static void |
| 1122 | supply_reg32 (struct regcache *regcache, int regno, uint32_t val) |
| 1123 | { |
| 1124 | regcache->raw_supply (regno, (char *) &val); |
| 1125 | } |
| 1126 | |
| 1127 | /* Record that the floating-point registers contain VALS. */ |
| 1128 | |
| 1129 | static void |
| 1130 | supply_fprs (struct regcache *regcache, double *vals) |
| 1131 | { |
| 1132 | struct gdbarch *gdbarch = regcache->arch (); |
| 1133 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1134 | int regno; |
| 1135 | |
| 1136 | /* This function should never be called on architectures without |
| 1137 | floating-point registers. */ |
| 1138 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
| 1139 | |
| 1140 | for (regno = tdep->ppc_fp0_regnum; |
| 1141 | regno < tdep->ppc_fp0_regnum + ppc_num_fprs; |
| 1142 | regno++) |
| 1143 | regcache->raw_supply (regno, |
| 1144 | (char *) (vals + regno - tdep->ppc_fp0_regnum)); |
| 1145 | } |
| 1146 | |
| 1147 | /* Predicate to test whether given register number is a "special" register. */ |
| 1148 | static int |
| 1149 | special_register_p (struct gdbarch *gdbarch, int regno) |
| 1150 | { |
| 1151 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1152 | |
| 1153 | return regno == gdbarch_pc_regnum (gdbarch) |
| 1154 | || regno == tdep->ppc_ps_regnum |
| 1155 | || regno == tdep->ppc_cr_regnum |
| 1156 | || regno == tdep->ppc_lr_regnum |
| 1157 | || regno == tdep->ppc_ctr_regnum |
| 1158 | || regno == tdep->ppc_xer_regnum |
| 1159 | || (tdep->ppc_fpscr_regnum >= 0 && regno == tdep->ppc_fpscr_regnum) |
| 1160 | || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum); |
| 1161 | } |
| 1162 | |
| 1163 | |
| 1164 | /* Record that the special registers contain the specified 64-bit and |
| 1165 | 32-bit values. */ |
| 1166 | |
| 1167 | static void |
| 1168 | supply_sprs64 (struct regcache *regcache, |
| 1169 | uint64_t iar, uint64_t msr, uint32_t cr, |
| 1170 | uint64_t lr, uint64_t ctr, uint32_t xer, |
| 1171 | uint32_t fpscr) |
| 1172 | { |
| 1173 | struct gdbarch *gdbarch = regcache->arch (); |
| 1174 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1175 | |
| 1176 | regcache->raw_supply (gdbarch_pc_regnum (gdbarch), (char *) &iar); |
| 1177 | regcache->raw_supply (tdep->ppc_ps_regnum, (char *) &msr); |
| 1178 | regcache->raw_supply (tdep->ppc_cr_regnum, (char *) &cr); |
| 1179 | regcache->raw_supply (tdep->ppc_lr_regnum, (char *) &lr); |
| 1180 | regcache->raw_supply (tdep->ppc_ctr_regnum, (char *) &ctr); |
| 1181 | regcache->raw_supply (tdep->ppc_xer_regnum, (char *) &xer); |
| 1182 | if (tdep->ppc_fpscr_regnum >= 0) |
| 1183 | regcache->raw_supply (tdep->ppc_fpscr_regnum, (char *) &fpscr); |
| 1184 | } |
| 1185 | |
| 1186 | /* Record that the special registers contain the specified 32-bit |
| 1187 | values. */ |
| 1188 | |
| 1189 | static void |
| 1190 | supply_sprs32 (struct regcache *regcache, |
| 1191 | uint32_t iar, uint32_t msr, uint32_t cr, |
| 1192 | uint32_t lr, uint32_t ctr, uint32_t xer, |
| 1193 | uint32_t fpscr) |
| 1194 | { |
| 1195 | struct gdbarch *gdbarch = regcache->arch (); |
| 1196 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1197 | |
| 1198 | regcache->raw_supply (gdbarch_pc_regnum (gdbarch), (char *) &iar); |
| 1199 | regcache->raw_supply (tdep->ppc_ps_regnum, (char *) &msr); |
| 1200 | regcache->raw_supply (tdep->ppc_cr_regnum, (char *) &cr); |
| 1201 | regcache->raw_supply (tdep->ppc_lr_regnum, (char *) &lr); |
| 1202 | regcache->raw_supply (tdep->ppc_ctr_regnum, (char *) &ctr); |
| 1203 | regcache->raw_supply (tdep->ppc_xer_regnum, (char *) &xer); |
| 1204 | if (tdep->ppc_fpscr_regnum >= 0) |
| 1205 | regcache->raw_supply (tdep->ppc_fpscr_regnum, (char *) &fpscr); |
| 1206 | } |
| 1207 | |
| 1208 | /* Fetch all registers from pthread PDTID, which doesn't have a kernel |
| 1209 | thread. |
| 1210 | |
| 1211 | There's no way to query a single register from a non-kernel |
| 1212 | pthread, so there's no need for a single-register version of this |
| 1213 | function. */ |
| 1214 | |
| 1215 | static void |
| 1216 | fetch_regs_user_thread (struct regcache *regcache, pthdb_pthread_t pdtid) |
| 1217 | { |
| 1218 | struct gdbarch *gdbarch = regcache->arch (); |
| 1219 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1220 | int status, i; |
| 1221 | pthdb_context_t ctx; |
| 1222 | |
| 1223 | if (debug_aix_thread) |
| 1224 | fprintf_unfiltered (gdb_stdlog, |
| 1225 | "fetch_regs_user_thread %lx\n", (long) pdtid); |
| 1226 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
| 1227 | if (status != PTHDB_SUCCESS) |
| 1228 | error (_("aix-thread: fetch_registers: pthdb_pthread_context returned %s"), |
| 1229 | pd_status2str (status)); |
| 1230 | |
| 1231 | /* General-purpose registers. */ |
| 1232 | |
| 1233 | if (arch64) |
| 1234 | supply_gprs64 (regcache, ctx.gpr); |
| 1235 | else |
| 1236 | for (i = 0; i < ppc_num_gprs; i++) |
| 1237 | supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, ctx.gpr[i]); |
| 1238 | |
| 1239 | /* Floating-point registers. */ |
| 1240 | |
| 1241 | if (ppc_floating_point_unit_p (gdbarch)) |
| 1242 | supply_fprs (regcache, ctx.fpr); |
| 1243 | |
| 1244 | /* Special registers. */ |
| 1245 | |
| 1246 | if (arch64) |
| 1247 | supply_sprs64 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, |
| 1248 | ctx.xer, ctx.fpscr); |
| 1249 | else |
| 1250 | supply_sprs32 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, |
| 1251 | ctx.xer, ctx.fpscr); |
| 1252 | } |
| 1253 | |
| 1254 | /* Fetch register REGNO if != -1 or all registers otherwise from |
| 1255 | kernel thread TID. |
| 1256 | |
| 1257 | AIX provides a way to query all of a kernel thread's GPRs, FPRs, or |
| 1258 | SPRs, but there's no way to query individual registers within those |
| 1259 | groups. Therefore, if REGNO != -1, this function fetches an entire |
| 1260 | group. |
| 1261 | |
| 1262 | Unfortunately, kernel thread register queries often fail with |
| 1263 | EPERM, indicating that the thread is in kernel space. This breaks |
| 1264 | backtraces of threads other than the current one. To make that |
| 1265 | breakage obvious without throwing an error to top level (which is |
| 1266 | bad e.g. during "info threads" output), zero registers that can't |
| 1267 | be retrieved. */ |
| 1268 | |
| 1269 | static void |
| 1270 | fetch_regs_kernel_thread (struct regcache *regcache, int regno, |
| 1271 | pthdb_tid_t tid) |
| 1272 | { |
| 1273 | struct gdbarch *gdbarch = regcache->arch (); |
| 1274 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1275 | uint64_t gprs64[ppc_num_gprs]; |
| 1276 | uint32_t gprs32[ppc_num_gprs]; |
| 1277 | double fprs[ppc_num_fprs]; |
| 1278 | struct ptxsprs sprs64; |
| 1279 | struct ptsprs sprs32; |
| 1280 | int i; |
| 1281 | |
| 1282 | if (debug_aix_thread) |
| 1283 | fprintf_unfiltered (gdb_stdlog, |
| 1284 | "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n", |
| 1285 | (long) tid, regno, arch64); |
| 1286 | |
| 1287 | /* General-purpose registers. */ |
| 1288 | if (regno == -1 |
| 1289 | || (tdep->ppc_gp0_regnum <= regno |
| 1290 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)) |
| 1291 | { |
| 1292 | if (arch64) |
| 1293 | { |
| 1294 | if (!ptrace64aix (PTT_READ_GPRS, tid, |
| 1295 | (unsigned long) gprs64, 0, NULL)) |
| 1296 | memset (gprs64, 0, sizeof (gprs64)); |
| 1297 | supply_gprs64 (regcache, gprs64); |
| 1298 | } |
| 1299 | else |
| 1300 | { |
| 1301 | if (!ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL)) |
| 1302 | memset (gprs32, 0, sizeof (gprs32)); |
| 1303 | for (i = 0; i < ppc_num_gprs; i++) |
| 1304 | supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, gprs32[i]); |
| 1305 | } |
| 1306 | } |
| 1307 | |
| 1308 | /* Floating-point registers. */ |
| 1309 | |
| 1310 | if (ppc_floating_point_unit_p (gdbarch) |
| 1311 | && (regno == -1 |
| 1312 | || (regno >= tdep->ppc_fp0_regnum |
| 1313 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) |
| 1314 | { |
| 1315 | if (!ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL)) |
| 1316 | memset (fprs, 0, sizeof (fprs)); |
| 1317 | supply_fprs (regcache, fprs); |
| 1318 | } |
| 1319 | |
| 1320 | /* Special-purpose registers. */ |
| 1321 | |
| 1322 | if (regno == -1 || special_register_p (gdbarch, regno)) |
| 1323 | { |
| 1324 | if (arch64) |
| 1325 | { |
| 1326 | if (!ptrace64aix (PTT_READ_SPRS, tid, |
| 1327 | (unsigned long) &sprs64, 0, NULL)) |
| 1328 | memset (&sprs64, 0, sizeof (sprs64)); |
| 1329 | supply_sprs64 (regcache, sprs64.pt_iar, sprs64.pt_msr, |
| 1330 | sprs64.pt_cr, sprs64.pt_lr, sprs64.pt_ctr, |
| 1331 | sprs64.pt_xer, sprs64.pt_fpscr); |
| 1332 | } |
| 1333 | else |
| 1334 | { |
| 1335 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1336 | |
| 1337 | if (!ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL)) |
| 1338 | memset (&sprs32, 0, sizeof (sprs32)); |
| 1339 | supply_sprs32 (regcache, sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr, |
| 1340 | sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer, |
| 1341 | sprs32.pt_fpscr); |
| 1342 | |
| 1343 | if (tdep->ppc_mq_regnum >= 0) |
| 1344 | regcache->raw_supply (tdep->ppc_mq_regnum, (char *) &sprs32.pt_mq); |
| 1345 | } |
| 1346 | } |
| 1347 | } |
| 1348 | |
| 1349 | /* Fetch register REGNO if != -1 or all registers otherwise from the |
| 1350 | thread/process connected to REGCACHE. */ |
| 1351 | |
| 1352 | void |
| 1353 | aix_thread_target::fetch_registers (struct regcache *regcache, int regno) |
| 1354 | { |
| 1355 | struct thread_info *thread; |
| 1356 | pthdb_tid_t tid; |
| 1357 | |
| 1358 | if (!PD_TID (regcache->ptid ())) |
| 1359 | beneath ()->fetch_registers (regcache, regno); |
| 1360 | else |
| 1361 | { |
| 1362 | thread = find_thread_ptid (regcache->ptid ()); |
| 1363 | aix_thread_info *priv = get_aix_thread_info (thread); |
| 1364 | tid = priv->tid; |
| 1365 | |
| 1366 | if (tid == PTHDB_INVALID_TID) |
| 1367 | fetch_regs_user_thread (regcache, priv->pdtid); |
| 1368 | else |
| 1369 | fetch_regs_kernel_thread (regcache, regno, tid); |
| 1370 | } |
| 1371 | } |
| 1372 | |
| 1373 | /* Store the gp registers into an array of uint32_t or uint64_t. */ |
| 1374 | |
| 1375 | static void |
| 1376 | fill_gprs64 (const struct regcache *regcache, uint64_t *vals) |
| 1377 | { |
| 1378 | struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| 1379 | int regno; |
| 1380 | |
| 1381 | for (regno = 0; regno < ppc_num_gprs; regno++) |
| 1382 | if (REG_VALID == regcache->get_register_status |
| 1383 | (tdep->ppc_gp0_regnum + regno)) |
| 1384 | regcache->raw_collect (tdep->ppc_gp0_regnum + regno, vals + regno); |
| 1385 | } |
| 1386 | |
| 1387 | static void |
| 1388 | fill_gprs32 (const struct regcache *regcache, uint32_t *vals) |
| 1389 | { |
| 1390 | struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| 1391 | int regno; |
| 1392 | |
| 1393 | for (regno = 0; regno < ppc_num_gprs; regno++) |
| 1394 | if (REG_VALID == regcache->get_register_status |
| 1395 | (tdep->ppc_gp0_regnum + regno)) |
| 1396 | regcache->raw_collect (tdep->ppc_gp0_regnum + regno, vals + regno); |
| 1397 | } |
| 1398 | |
| 1399 | /* Store the floating point registers into a double array. */ |
| 1400 | static void |
| 1401 | fill_fprs (const struct regcache *regcache, double *vals) |
| 1402 | { |
| 1403 | struct gdbarch *gdbarch = regcache->arch (); |
| 1404 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1405 | int regno; |
| 1406 | |
| 1407 | /* This function should never be called on architectures without |
| 1408 | floating-point registers. */ |
| 1409 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
| 1410 | |
| 1411 | for (regno = tdep->ppc_fp0_regnum; |
| 1412 | regno < tdep->ppc_fp0_regnum + ppc_num_fprs; |
| 1413 | regno++) |
| 1414 | if (REG_VALID == regcache->get_register_status (regno)) |
| 1415 | regcache->raw_collect (regno, vals + regno - tdep->ppc_fp0_regnum); |
| 1416 | } |
| 1417 | |
| 1418 | /* Store the special registers into the specified 64-bit and 32-bit |
| 1419 | locations. */ |
| 1420 | |
| 1421 | static void |
| 1422 | fill_sprs64 (const struct regcache *regcache, |
| 1423 | uint64_t *iar, uint64_t *msr, uint32_t *cr, |
| 1424 | uint64_t *lr, uint64_t *ctr, uint32_t *xer, |
| 1425 | uint32_t *fpscr) |
| 1426 | { |
| 1427 | struct gdbarch *gdbarch = regcache->arch (); |
| 1428 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1429 | |
| 1430 | /* Verify that the size of the size of the IAR buffer is the |
| 1431 | same as the raw size of the PC (in the register cache). If |
| 1432 | they're not, then either GDB has been built incorrectly, or |
| 1433 | there's some other kind of internal error. To be really safe, |
| 1434 | we should check all of the sizes. */ |
| 1435 | gdb_assert (sizeof (*iar) == register_size |
| 1436 | (gdbarch, gdbarch_pc_regnum (gdbarch))); |
| 1437 | |
| 1438 | if (REG_VALID == regcache->get_register_status (gdbarch_pc_regnum (gdbarch))) |
| 1439 | regcache->raw_collect (gdbarch_pc_regnum (gdbarch), iar); |
| 1440 | if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum)) |
| 1441 | regcache->raw_collect (tdep->ppc_ps_regnum, msr); |
| 1442 | if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum)) |
| 1443 | regcache->raw_collect (tdep->ppc_cr_regnum, cr); |
| 1444 | if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum)) |
| 1445 | regcache->raw_collect (tdep->ppc_lr_regnum, lr); |
| 1446 | if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum)) |
| 1447 | regcache->raw_collect (tdep->ppc_ctr_regnum, ctr); |
| 1448 | if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum)) |
| 1449 | regcache->raw_collect (tdep->ppc_xer_regnum, xer); |
| 1450 | if (tdep->ppc_fpscr_regnum >= 0 |
| 1451 | && REG_VALID == regcache->get_register_status (tdep->ppc_fpscr_regnum)) |
| 1452 | regcache->raw_collect (tdep->ppc_fpscr_regnum, fpscr); |
| 1453 | } |
| 1454 | |
| 1455 | static void |
| 1456 | fill_sprs32 (const struct regcache *regcache, |
| 1457 | uint32_t *iar, uint32_t *msr, uint32_t *cr, |
| 1458 | uint32_t *lr, uint32_t *ctr, uint32_t *xer, |
| 1459 | uint32_t *fpscr) |
| 1460 | { |
| 1461 | struct gdbarch *gdbarch = regcache->arch (); |
| 1462 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1463 | |
| 1464 | /* Verify that the size of the size of the IAR buffer is the |
| 1465 | same as the raw size of the PC (in the register cache). If |
| 1466 | they're not, then either GDB has been built incorrectly, or |
| 1467 | there's some other kind of internal error. To be really safe, |
| 1468 | we should check all of the sizes. */ |
| 1469 | gdb_assert (sizeof (*iar) == register_size (gdbarch, |
| 1470 | gdbarch_pc_regnum (gdbarch))); |
| 1471 | |
| 1472 | if (REG_VALID == regcache->get_register_status (gdbarch_pc_regnum (gdbarch))) |
| 1473 | regcache->raw_collect (gdbarch_pc_regnum (gdbarch), iar); |
| 1474 | if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum)) |
| 1475 | regcache->raw_collect (tdep->ppc_ps_regnum, msr); |
| 1476 | if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum)) |
| 1477 | regcache->raw_collect (tdep->ppc_cr_regnum, cr); |
| 1478 | if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum)) |
| 1479 | regcache->raw_collect (tdep->ppc_lr_regnum, lr); |
| 1480 | if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum)) |
| 1481 | regcache->raw_collect (tdep->ppc_ctr_regnum, ctr); |
| 1482 | if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum)) |
| 1483 | regcache->raw_collect (tdep->ppc_xer_regnum, xer); |
| 1484 | if (tdep->ppc_fpscr_regnum >= 0 |
| 1485 | && REG_VALID == regcache->get_register_status (tdep->ppc_fpscr_regnum)) |
| 1486 | regcache->raw_collect (tdep->ppc_fpscr_regnum, fpscr); |
| 1487 | } |
| 1488 | |
| 1489 | /* Store all registers into pthread PDTID, which doesn't have a kernel |
| 1490 | thread. |
| 1491 | |
| 1492 | It's possible to store a single register into a non-kernel pthread, |
| 1493 | but I doubt it's worth the effort. */ |
| 1494 | |
| 1495 | static void |
| 1496 | store_regs_user_thread (const struct regcache *regcache, pthdb_pthread_t pdtid) |
| 1497 | { |
| 1498 | struct gdbarch *gdbarch = regcache->arch (); |
| 1499 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1500 | int status, i; |
| 1501 | pthdb_context_t ctx; |
| 1502 | uint32_t int32; |
| 1503 | uint64_t int64; |
| 1504 | double dbl; |
| 1505 | |
| 1506 | if (debug_aix_thread) |
| 1507 | fprintf_unfiltered (gdb_stdlog, |
| 1508 | "store_regs_user_thread %lx\n", (long) pdtid); |
| 1509 | |
| 1510 | /* Retrieve the thread's current context for its non-register |
| 1511 | values. */ |
| 1512 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
| 1513 | if (status != PTHDB_SUCCESS) |
| 1514 | error (_("aix-thread: store_registers: pthdb_pthread_context returned %s"), |
| 1515 | pd_status2str (status)); |
| 1516 | |
| 1517 | /* Collect general-purpose register values from the regcache. */ |
| 1518 | |
| 1519 | for (i = 0; i < ppc_num_gprs; i++) |
| 1520 | if (REG_VALID == regcache->get_register_status (tdep->ppc_gp0_regnum + i)) |
| 1521 | { |
| 1522 | if (arch64) |
| 1523 | { |
| 1524 | regcache->raw_collect (tdep->ppc_gp0_regnum + i, (void *) &int64); |
| 1525 | ctx.gpr[i] = int64; |
| 1526 | } |
| 1527 | else |
| 1528 | { |
| 1529 | regcache->raw_collect (tdep->ppc_gp0_regnum + i, (void *) &int32); |
| 1530 | ctx.gpr[i] = int32; |
| 1531 | } |
| 1532 | } |
| 1533 | |
| 1534 | /* Collect floating-point register values from the regcache. */ |
| 1535 | if (ppc_floating_point_unit_p (gdbarch)) |
| 1536 | fill_fprs (regcache, ctx.fpr); |
| 1537 | |
| 1538 | /* Special registers (always kept in ctx as 64 bits). */ |
| 1539 | if (arch64) |
| 1540 | { |
| 1541 | fill_sprs64 (regcache, &ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr, |
| 1542 | &ctx.xer, &ctx.fpscr); |
| 1543 | } |
| 1544 | else |
| 1545 | { |
| 1546 | /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32. |
| 1547 | Solution: use 32-bit temp variables. */ |
| 1548 | uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, |
| 1549 | tmp_fpscr; |
| 1550 | |
| 1551 | fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr, |
| 1552 | &tmp_xer, &tmp_fpscr); |
| 1553 | if (REG_VALID == regcache->get_register_status |
| 1554 | (gdbarch_pc_regnum (gdbarch))) |
| 1555 | ctx.iar = tmp_iar; |
| 1556 | if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum)) |
| 1557 | ctx.msr = tmp_msr; |
| 1558 | if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum)) |
| 1559 | ctx.cr = tmp_cr; |
| 1560 | if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum)) |
| 1561 | ctx.lr = tmp_lr; |
| 1562 | if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum)) |
| 1563 | ctx.ctr = tmp_ctr; |
| 1564 | if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum)) |
| 1565 | ctx.xer = tmp_xer; |
| 1566 | if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum)) |
| 1567 | ctx.fpscr = tmp_fpscr; |
| 1568 | } |
| 1569 | |
| 1570 | status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx); |
| 1571 | if (status != PTHDB_SUCCESS) |
| 1572 | error (_("aix-thread: store_registers: " |
| 1573 | "pthdb_pthread_setcontext returned %s"), |
| 1574 | pd_status2str (status)); |
| 1575 | } |
| 1576 | |
| 1577 | /* Store register REGNO if != -1 or all registers otherwise into |
| 1578 | kernel thread TID. |
| 1579 | |
| 1580 | AIX provides a way to set all of a kernel thread's GPRs, FPRs, or |
| 1581 | SPRs, but there's no way to set individual registers within those |
| 1582 | groups. Therefore, if REGNO != -1, this function stores an entire |
| 1583 | group. */ |
| 1584 | |
| 1585 | static void |
| 1586 | store_regs_kernel_thread (const struct regcache *regcache, int regno, |
| 1587 | pthdb_tid_t tid) |
| 1588 | { |
| 1589 | struct gdbarch *gdbarch = regcache->arch (); |
| 1590 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1591 | uint64_t gprs64[ppc_num_gprs]; |
| 1592 | uint32_t gprs32[ppc_num_gprs]; |
| 1593 | double fprs[ppc_num_fprs]; |
| 1594 | struct ptxsprs sprs64; |
| 1595 | struct ptsprs sprs32; |
| 1596 | int i; |
| 1597 | |
| 1598 | if (debug_aix_thread) |
| 1599 | fprintf_unfiltered (gdb_stdlog, |
| 1600 | "store_regs_kernel_thread tid=%lx regno=%d\n", |
| 1601 | (long) tid, regno); |
| 1602 | |
| 1603 | /* General-purpose registers. */ |
| 1604 | if (regno == -1 |
| 1605 | || (tdep->ppc_gp0_regnum <= regno |
| 1606 | && regno < tdep->ppc_gp0_regnum + ppc_num_fprs)) |
| 1607 | { |
| 1608 | if (arch64) |
| 1609 | { |
| 1610 | /* Pre-fetch: some regs may not be in the cache. */ |
| 1611 | ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL); |
| 1612 | fill_gprs64 (regcache, gprs64); |
| 1613 | ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL); |
| 1614 | } |
| 1615 | else |
| 1616 | { |
| 1617 | /* Pre-fetch: some regs may not be in the cache. */ |
| 1618 | ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL); |
| 1619 | fill_gprs32 (regcache, gprs32); |
| 1620 | ptrace32 (PTT_WRITE_GPRS, tid, (uintptr_t) gprs32, 0, NULL); |
| 1621 | } |
| 1622 | } |
| 1623 | |
| 1624 | /* Floating-point registers. */ |
| 1625 | |
| 1626 | if (ppc_floating_point_unit_p (gdbarch) |
| 1627 | && (regno == -1 |
| 1628 | || (regno >= tdep->ppc_fp0_regnum |
| 1629 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) |
| 1630 | { |
| 1631 | /* Pre-fetch: some regs may not be in the cache. */ |
| 1632 | ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL); |
| 1633 | fill_fprs (regcache, fprs); |
| 1634 | ptrace32 (PTT_WRITE_FPRS, tid, (uintptr_t) fprs, 0, NULL); |
| 1635 | } |
| 1636 | |
| 1637 | /* Special-purpose registers. */ |
| 1638 | |
| 1639 | if (regno == -1 || special_register_p (gdbarch, regno)) |
| 1640 | { |
| 1641 | if (arch64) |
| 1642 | { |
| 1643 | /* Pre-fetch: some registers won't be in the cache. */ |
| 1644 | ptrace64aix (PTT_READ_SPRS, tid, |
| 1645 | (unsigned long) &sprs64, 0, NULL); |
| 1646 | fill_sprs64 (regcache, &sprs64.pt_iar, &sprs64.pt_msr, |
| 1647 | &sprs64.pt_cr, &sprs64.pt_lr, &sprs64.pt_ctr, |
| 1648 | &sprs64.pt_xer, &sprs64.pt_fpscr); |
| 1649 | ptrace64aix (PTT_WRITE_SPRS, tid, |
| 1650 | (unsigned long) &sprs64, 0, NULL); |
| 1651 | } |
| 1652 | else |
| 1653 | { |
| 1654 | /* The contents of "struct ptspr" were declared as "unsigned |
| 1655 | long" up to AIX 5.2, but are "unsigned int" since 5.3. |
| 1656 | Use temporaries to work around this problem. Also, add an |
| 1657 | assert here to make sure we fail if the system header files |
| 1658 | use "unsigned long", and the size of that type is not what |
| 1659 | the headers expect. */ |
| 1660 | uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, |
| 1661 | tmp_fpscr; |
| 1662 | |
| 1663 | gdb_assert (sizeof (sprs32.pt_iar) == 4); |
| 1664 | |
| 1665 | /* Pre-fetch: some registers won't be in the cache. */ |
| 1666 | ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL); |
| 1667 | |
| 1668 | fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, |
| 1669 | &tmp_ctr, &tmp_xer, &tmp_fpscr); |
| 1670 | |
| 1671 | sprs32.pt_iar = tmp_iar; |
| 1672 | sprs32.pt_msr = tmp_msr; |
| 1673 | sprs32.pt_cr = tmp_cr; |
| 1674 | sprs32.pt_lr = tmp_lr; |
| 1675 | sprs32.pt_ctr = tmp_ctr; |
| 1676 | sprs32.pt_xer = tmp_xer; |
| 1677 | sprs32.pt_fpscr = tmp_fpscr; |
| 1678 | |
| 1679 | if (tdep->ppc_mq_regnum >= 0) |
| 1680 | if (REG_VALID == regcache->get_register_status |
| 1681 | (tdep->ppc_mq_regnum)) |
| 1682 | regcache->raw_collect (tdep->ppc_mq_regnum, &sprs32.pt_mq); |
| 1683 | |
| 1684 | ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &sprs32, 0, NULL); |
| 1685 | } |
| 1686 | } |
| 1687 | } |
| 1688 | |
| 1689 | /* Store gdb's current view of the register set into the |
| 1690 | thread/process connected to REGCACHE. */ |
| 1691 | |
| 1692 | void |
| 1693 | aix_thread_target::store_registers (struct regcache *regcache, int regno) |
| 1694 | { |
| 1695 | struct thread_info *thread; |
| 1696 | pthdb_tid_t tid; |
| 1697 | |
| 1698 | if (!PD_TID (regcache->ptid ())) |
| 1699 | beneath ()->store_registers (regcache, regno); |
| 1700 | else |
| 1701 | { |
| 1702 | thread = find_thread_ptid (regcache->ptid ()); |
| 1703 | aix_thread_info *priv = get_aix_thread_info (thread); |
| 1704 | tid = priv->tid; |
| 1705 | |
| 1706 | if (tid == PTHDB_INVALID_TID) |
| 1707 | store_regs_user_thread (regcache, priv->pdtid); |
| 1708 | else |
| 1709 | store_regs_kernel_thread (regcache, regno, tid); |
| 1710 | } |
| 1711 | } |
| 1712 | |
| 1713 | /* Implement the to_xfer_partial target_ops method. */ |
| 1714 | |
| 1715 | enum target_xfer_status |
| 1716 | aix_thread_target::xfer_partial (enum target_object object, |
| 1717 | const char *annex, gdb_byte *readbuf, |
| 1718 | const gdb_byte *writebuf, |
| 1719 | ULONGEST offset, ULONGEST len, |
| 1720 | ULONGEST *xfered_len) |
| 1721 | { |
| 1722 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| 1723 | |
| 1724 | inferior_ptid = ptid_t (inferior_ptid.pid ()); |
| 1725 | return beneath ()->xfer_partial (object, annex, readbuf, |
| 1726 | writebuf, offset, len, xfered_len); |
| 1727 | } |
| 1728 | |
| 1729 | /* Clean up after the inferior exits. */ |
| 1730 | |
| 1731 | void |
| 1732 | aix_thread_target::mourn_inferior () |
| 1733 | { |
| 1734 | target_ops *beneath = this->beneath (); |
| 1735 | |
| 1736 | pd_deactivate (); |
| 1737 | beneath->mourn_inferior (); |
| 1738 | } |
| 1739 | |
| 1740 | /* Return whether thread PID is still valid. */ |
| 1741 | |
| 1742 | bool |
| 1743 | aix_thread_target::thread_alive (ptid_t ptid) |
| 1744 | { |
| 1745 | if (!PD_TID (ptid)) |
| 1746 | return beneath ()->thread_alive (ptid); |
| 1747 | |
| 1748 | /* We update the thread list every time the child stops, so all |
| 1749 | valid threads should be in the thread list. */ |
| 1750 | return in_thread_list (ptid); |
| 1751 | } |
| 1752 | |
| 1753 | /* Return a printable representation of composite PID for use in |
| 1754 | "info threads" output. */ |
| 1755 | |
| 1756 | const char * |
| 1757 | aix_thread_target::pid_to_str (ptid_t ptid) |
| 1758 | { |
| 1759 | static char *ret = NULL; |
| 1760 | |
| 1761 | if (!PD_TID (ptid)) |
| 1762 | return beneath ()->pid_to_str (ptid); |
| 1763 | |
| 1764 | /* Free previous return value; a new one will be allocated by |
| 1765 | xstrprintf(). */ |
| 1766 | xfree (ret); |
| 1767 | |
| 1768 | ret = xstrprintf (_("Thread %ld"), ptid.tid ()); |
| 1769 | return ret; |
| 1770 | } |
| 1771 | |
| 1772 | /* Return a printable representation of extra information about |
| 1773 | THREAD, for use in "info threads" output. */ |
| 1774 | |
| 1775 | const char * |
| 1776 | aix_thread_target::extra_thread_info (struct thread_info *thread) |
| 1777 | { |
| 1778 | int status; |
| 1779 | pthdb_pthread_t pdtid; |
| 1780 | pthdb_tid_t tid; |
| 1781 | pthdb_state_t state; |
| 1782 | pthdb_suspendstate_t suspendstate; |
| 1783 | pthdb_detachstate_t detachstate; |
| 1784 | int cancelpend; |
| 1785 | static char *ret = NULL; |
| 1786 | |
| 1787 | if (!PD_TID (thread->ptid)) |
| 1788 | return NULL; |
| 1789 | |
| 1790 | string_file buf; |
| 1791 | aix_thread_info *priv = get_aix_thread_info (thread); |
| 1792 | |
| 1793 | pdtid = priv->pdtid; |
| 1794 | tid = priv->tid; |
| 1795 | |
| 1796 | if (tid != PTHDB_INVALID_TID) |
| 1797 | /* i18n: Like "thread-identifier %d, [state] running, suspended" */ |
| 1798 | buf.printf (_("tid %d"), (int)tid); |
| 1799 | |
| 1800 | status = pthdb_pthread_state (pd_session, pdtid, &state); |
| 1801 | if (status != PTHDB_SUCCESS) |
| 1802 | state = PST_NOTSUP; |
| 1803 | buf.printf (", %s", state2str (state)); |
| 1804 | |
| 1805 | status = pthdb_pthread_suspendstate (pd_session, pdtid, |
| 1806 | &suspendstate); |
| 1807 | if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED) |
| 1808 | /* i18n: Like "Thread-Id %d, [state] running, suspended" */ |
| 1809 | buf.printf (_(", suspended")); |
| 1810 | |
| 1811 | status = pthdb_pthread_detachstate (pd_session, pdtid, |
| 1812 | &detachstate); |
| 1813 | if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED) |
| 1814 | /* i18n: Like "Thread-Id %d, [state] running, detached" */ |
| 1815 | buf.printf (_(", detached")); |
| 1816 | |
| 1817 | pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend); |
| 1818 | if (status == PTHDB_SUCCESS && cancelpend) |
| 1819 | /* i18n: Like "Thread-Id %d, [state] running, cancel pending" */ |
| 1820 | buf.printf (_(", cancel pending")); |
| 1821 | |
| 1822 | buf.write ("", 1); |
| 1823 | |
| 1824 | xfree (ret); /* Free old buffer. */ |
| 1825 | |
| 1826 | ret = xstrdup (buf.c_str ()); |
| 1827 | |
| 1828 | return ret; |
| 1829 | } |
| 1830 | |
| 1831 | ptid_t |
| 1832 | aix_thread_target::get_ada_task_ptid (long lwp, long thread) |
| 1833 | { |
| 1834 | return ptid_t (inferior_ptid.pid (), 0, thread); |
| 1835 | } |
| 1836 | |
| 1837 | |
| 1838 | /* Module startup initialization function, automagically called by |
| 1839 | init.c. */ |
| 1840 | |
| 1841 | void |
| 1842 | _initialize_aix_thread (void) |
| 1843 | { |
| 1844 | /* Notice when object files get loaded and unloaded. */ |
| 1845 | gdb::observers::new_objfile.attach (new_objfile); |
| 1846 | |
| 1847 | /* Add ourselves to inferior_created event chain. |
| 1848 | This is needed to enable the thread target on "attach". */ |
| 1849 | gdb::observers::inferior_created.attach (aix_thread_inferior_created); |
| 1850 | |
| 1851 | add_setshow_boolean_cmd ("aix-thread", class_maintenance, &debug_aix_thread, |
| 1852 | _("Set debugging of AIX thread module."), |
| 1853 | _("Show debugging of AIX thread module."), |
| 1854 | _("Enables debugging output (used to debug GDB)."), |
| 1855 | NULL, NULL, |
| 1856 | /* FIXME: i18n: Debugging of AIX thread |
| 1857 | module is \"%d\". */ |
| 1858 | &setdebuglist, &showdebuglist); |
| 1859 | } |