| 1 | /* Low level interface for debugging AIX 4.3+ pthreads. |
| 2 | |
| 3 | Copyright (C) 1999, 2000, 2002, 2007, 2008 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 "gdb_assert.h" |
| 44 | #include "gdbthread.h" |
| 45 | #include "target.h" |
| 46 | #include "inferior.h" |
| 47 | #include "regcache.h" |
| 48 | #include "gdbcmd.h" |
| 49 | #include "ppc-tdep.h" |
| 50 | #include "gdb_string.h" |
| 51 | #include "observer.h" |
| 52 | |
| 53 | #include <procinfo.h> |
| 54 | #include <sys/types.h> |
| 55 | #include <sys/ptrace.h> |
| 56 | #include <sys/reg.h> |
| 57 | #include <sched.h> |
| 58 | #include <sys/pthdebug.h> |
| 59 | |
| 60 | /* Whether to emit debugging output. */ |
| 61 | static int debug_aix_thread; |
| 62 | |
| 63 | /* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */ |
| 64 | #ifndef PTHDB_VERSION_3 |
| 65 | #define pthdb_tid_t tid_t |
| 66 | #endif |
| 67 | |
| 68 | /* Return whether to treat PID as a debuggable thread id. */ |
| 69 | |
| 70 | #define PD_TID(ptid) (pd_active && ptid_get_tid (ptid) != 0) |
| 71 | |
| 72 | /* Build a thread ptid. */ |
| 73 | #define BUILD_THREAD(TID, PID) ptid_build (PID, 0, TID) |
| 74 | |
| 75 | /* Build and lwp ptid. */ |
| 76 | #define BUILD_LWP(LWP, PID) MERGEPID (PID, LWP) |
| 77 | |
| 78 | /* pthdb_user_t value that we pass to pthdb functions. 0 causes |
| 79 | PTHDB_BAD_USER errors, so use 1. */ |
| 80 | |
| 81 | #define PD_USER 1 |
| 82 | |
| 83 | /* Success and failure values returned by pthdb callbacks. */ |
| 84 | |
| 85 | #define PDC_SUCCESS PTHDB_SUCCESS |
| 86 | #define PDC_FAILURE PTHDB_CALLBACK |
| 87 | |
| 88 | /* Private data attached to each element in GDB's thread list. */ |
| 89 | |
| 90 | struct private_thread_info { |
| 91 | pthdb_pthread_t pdtid; /* thread's libpthdebug id */ |
| 92 | pthdb_tid_t tid; /* kernel thread id */ |
| 93 | }; |
| 94 | |
| 95 | /* Information about a thread of which libpthdebug is aware. */ |
| 96 | |
| 97 | struct pd_thread { |
| 98 | pthdb_pthread_t pdtid; |
| 99 | pthread_t pthid; |
| 100 | pthdb_tid_t tid; |
| 101 | }; |
| 102 | |
| 103 | /* This module's target-specific operations, active while pd_able is true. */ |
| 104 | |
| 105 | static struct target_ops aix_thread_ops; |
| 106 | |
| 107 | /* Copy of the target over which ops is pushed. This is more |
| 108 | convenient than a pointer to deprecated_child_ops or core_ops, |
| 109 | because they lack current_target's default callbacks. */ |
| 110 | |
| 111 | static struct target_ops base_target; |
| 112 | |
| 113 | /* Address of the function that libpthread will call when libpthdebug |
| 114 | is ready to be initialized. */ |
| 115 | |
| 116 | static CORE_ADDR pd_brk_addr; |
| 117 | |
| 118 | /* Whether the current application is debuggable by pthdb. */ |
| 119 | |
| 120 | static int pd_able = 0; |
| 121 | |
| 122 | /* Whether a threaded application is being debugged. */ |
| 123 | |
| 124 | static int pd_active = 0; |
| 125 | |
| 126 | /* Whether the current architecture is 64-bit. |
| 127 | Only valid when pd_able is true. */ |
| 128 | |
| 129 | static int arch64; |
| 130 | |
| 131 | /* Forward declarations for pthdb callbacks. */ |
| 132 | |
| 133 | static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int); |
| 134 | static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t); |
| 135 | static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t); |
| 136 | static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid, |
| 137 | unsigned long long flags, |
| 138 | pthdb_context_t *context); |
| 139 | static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid, |
| 140 | unsigned long long flags, |
| 141 | pthdb_context_t *context); |
| 142 | static int pdc_alloc (pthdb_user_t, size_t, void **); |
| 143 | static int pdc_realloc (pthdb_user_t, void *, size_t, void **); |
| 144 | static int pdc_dealloc (pthdb_user_t, void *); |
| 145 | |
| 146 | /* pthdb callbacks. */ |
| 147 | |
| 148 | static pthdb_callbacks_t pd_callbacks = { |
| 149 | pdc_symbol_addrs, |
| 150 | pdc_read_data, |
| 151 | pdc_write_data, |
| 152 | pdc_read_regs, |
| 153 | pdc_write_regs, |
| 154 | pdc_alloc, |
| 155 | pdc_realloc, |
| 156 | pdc_dealloc, |
| 157 | NULL |
| 158 | }; |
| 159 | |
| 160 | /* Current pthdb session. */ |
| 161 | |
| 162 | static pthdb_session_t pd_session; |
| 163 | |
| 164 | /* Return a printable representation of pthdebug function return |
| 165 | STATUS. */ |
| 166 | |
| 167 | static char * |
| 168 | pd_status2str (int status) |
| 169 | { |
| 170 | switch (status) |
| 171 | { |
| 172 | case PTHDB_SUCCESS: return "SUCCESS"; |
| 173 | case PTHDB_NOSYS: return "NOSYS"; |
| 174 | case PTHDB_NOTSUP: return "NOTSUP"; |
| 175 | case PTHDB_BAD_VERSION: return "BAD_VERSION"; |
| 176 | case PTHDB_BAD_USER: return "BAD_USER"; |
| 177 | case PTHDB_BAD_SESSION: return "BAD_SESSION"; |
| 178 | case PTHDB_BAD_MODE: return "BAD_MODE"; |
| 179 | case PTHDB_BAD_FLAGS: return "BAD_FLAGS"; |
| 180 | case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK"; |
| 181 | case PTHDB_BAD_POINTER: return "BAD_POINTER"; |
| 182 | case PTHDB_BAD_CMD: return "BAD_CMD"; |
| 183 | case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD"; |
| 184 | case PTHDB_BAD_ATTR: return "BAD_ATTR"; |
| 185 | case PTHDB_BAD_MUTEX: return "BAD_MUTEX"; |
| 186 | case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR"; |
| 187 | case PTHDB_BAD_COND: return "BAD_COND"; |
| 188 | case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR"; |
| 189 | case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK"; |
| 190 | case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR"; |
| 191 | case PTHDB_BAD_KEY: return "BAD_KEY"; |
| 192 | case PTHDB_BAD_PTID: return "BAD_PTID"; |
| 193 | case PTHDB_BAD_TID: return "BAD_TID"; |
| 194 | case PTHDB_CALLBACK: return "CALLBACK"; |
| 195 | case PTHDB_CONTEXT: return "CONTEXT"; |
| 196 | case PTHDB_HELD: return "HELD"; |
| 197 | case PTHDB_NOT_HELD: return "NOT_HELD"; |
| 198 | case PTHDB_MEMORY: return "MEMORY"; |
| 199 | case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED"; |
| 200 | case PTHDB_SYMBOL: return "SYMBOL"; |
| 201 | case PTHDB_NOT_AVAIL: return "NOT_AVAIL"; |
| 202 | case PTHDB_INTERNAL: return "INTERNAL"; |
| 203 | default: return "UNKNOWN"; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /* A call to ptrace(REQ, ID, ...) just returned RET. Check for |
| 208 | exceptional conditions and either return nonlocally or else return |
| 209 | 1 for success and 0 for failure. */ |
| 210 | |
| 211 | static int |
| 212 | ptrace_check (int req, int id, int ret) |
| 213 | { |
| 214 | if (ret == 0 && !errno) |
| 215 | return 1; |
| 216 | |
| 217 | /* According to ptrace(2), ptrace may fail with EPERM if "the |
| 218 | Identifier parameter corresponds to a kernel thread which is |
| 219 | stopped in kernel mode and whose computational state cannot be |
| 220 | read or written." This happens quite often with register reads. */ |
| 221 | |
| 222 | switch (req) |
| 223 | { |
| 224 | case PTT_READ_GPRS: |
| 225 | case PTT_READ_FPRS: |
| 226 | case PTT_READ_SPRS: |
| 227 | if (ret == -1 && errno == EPERM) |
| 228 | { |
| 229 | if (debug_aix_thread) |
| 230 | fprintf_unfiltered (gdb_stdlog, |
| 231 | "ptrace (%d, %d) = %d (errno = %d)\n", |
| 232 | req, id, ret, errno); |
| 233 | return ret == -1 ? 0 : 1; |
| 234 | } |
| 235 | break; |
| 236 | } |
| 237 | error (_("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)"), |
| 238 | req, id, ret, errno, safe_strerror (errno)); |
| 239 | return 0; /* Not reached. */ |
| 240 | } |
| 241 | |
| 242 | /* Call ptracex (REQ, ID, ADDR, DATA, BUF). Return success. */ |
| 243 | |
| 244 | static int |
| 245 | ptrace64aix (int req, int id, long long addr, int data, int *buf) |
| 246 | { |
| 247 | errno = 0; |
| 248 | return ptrace_check (req, id, ptracex (req, id, addr, data, buf)); |
| 249 | } |
| 250 | |
| 251 | /* Call ptrace (REQ, ID, ADDR, DATA, BUF). Return success. */ |
| 252 | |
| 253 | static int |
| 254 | ptrace32 (int req, int id, int *addr, int data, int *buf) |
| 255 | { |
| 256 | errno = 0; |
| 257 | return ptrace_check (req, id, |
| 258 | ptrace (req, id, (int *) addr, data, buf)); |
| 259 | } |
| 260 | |
| 261 | /* If *PIDP is a composite process/thread id, convert it to a |
| 262 | process id. */ |
| 263 | |
| 264 | static void |
| 265 | pid_to_prc (ptid_t *ptidp) |
| 266 | { |
| 267 | ptid_t ptid; |
| 268 | |
| 269 | ptid = *ptidp; |
| 270 | if (PD_TID (ptid)) |
| 271 | *ptidp = pid_to_ptid (PIDGET (ptid)); |
| 272 | } |
| 273 | |
| 274 | /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to |
| 275 | the address of SYMBOLS[<i>].name. */ |
| 276 | |
| 277 | static int |
| 278 | pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) |
| 279 | { |
| 280 | struct minimal_symbol *ms; |
| 281 | int i; |
| 282 | char *name; |
| 283 | |
| 284 | if (debug_aix_thread) |
| 285 | fprintf_unfiltered (gdb_stdlog, |
| 286 | "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n", |
| 287 | user, (long) symbols, count); |
| 288 | |
| 289 | for (i = 0; i < count; i++) |
| 290 | { |
| 291 | name = symbols[i].name; |
| 292 | if (debug_aix_thread) |
| 293 | fprintf_unfiltered (gdb_stdlog, |
| 294 | " symbols[%d].name = \"%s\"\n", i, name); |
| 295 | |
| 296 | if (!*name) |
| 297 | symbols[i].addr = 0; |
| 298 | else |
| 299 | { |
| 300 | if (!(ms = lookup_minimal_symbol (name, NULL, NULL))) |
| 301 | { |
| 302 | if (debug_aix_thread) |
| 303 | fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n"); |
| 304 | return PDC_FAILURE; |
| 305 | } |
| 306 | symbols[i].addr = SYMBOL_VALUE_ADDRESS (ms); |
| 307 | } |
| 308 | if (debug_aix_thread) |
| 309 | fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = %s\n", |
| 310 | i, hex_string (symbols[i].addr)); |
| 311 | } |
| 312 | if (debug_aix_thread) |
| 313 | fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n"); |
| 314 | return PDC_SUCCESS; |
| 315 | } |
| 316 | |
| 317 | /* Read registers call back function should be able to read the |
| 318 | context information of a debuggee kernel thread from an active |
| 319 | process or from a core file. The information should be formatted |
| 320 | in context64 form for both 32-bit and 64-bit process. |
| 321 | If successful return 0, else non-zero is returned. */ |
| 322 | |
| 323 | static int |
| 324 | pdc_read_regs (pthdb_user_t user, |
| 325 | pthdb_tid_t tid, |
| 326 | unsigned long long flags, |
| 327 | pthdb_context_t *context) |
| 328 | { |
| 329 | /* This function doesn't appear to be used, so we could probably |
| 330 | just return 0 here. HOWEVER, if it is not defined, the OS will |
| 331 | complain and several thread debug functions will fail. In case |
| 332 | this is needed, I have implemented what I think it should do, |
| 333 | however this code is untested. */ |
| 334 | |
| 335 | uint64_t gprs64[ppc_num_gprs]; |
| 336 | uint32_t gprs32[ppc_num_gprs]; |
| 337 | double fprs[ppc_num_fprs]; |
| 338 | struct ptxsprs sprs64; |
| 339 | struct ptsprs sprs32; |
| 340 | |
| 341 | if (debug_aix_thread) |
| 342 | fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n", |
| 343 | (int) tid, hex_string (flags)); |
| 344 | |
| 345 | /* General-purpose registers. */ |
| 346 | if (flags & PTHDB_FLAG_GPRS) |
| 347 | { |
| 348 | if (arch64) |
| 349 | { |
| 350 | if (!ptrace64aix (PTT_READ_GPRS, tid, |
| 351 | (unsigned long) gprs64, 0, NULL)) |
| 352 | memset (gprs64, 0, sizeof (gprs64)); |
| 353 | memcpy (context->gpr, gprs64, sizeof(gprs64)); |
| 354 | } |
| 355 | else |
| 356 | { |
| 357 | if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) |
| 358 | memset (gprs32, 0, sizeof (gprs32)); |
| 359 | memcpy (context->gpr, gprs32, sizeof(gprs32)); |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | /* Floating-point registers. */ |
| 364 | if (flags & PTHDB_FLAG_FPRS) |
| 365 | { |
| 366 | if (!ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL)) |
| 367 | memset (fprs, 0, sizeof (fprs)); |
| 368 | memcpy (context->fpr, fprs, sizeof(fprs)); |
| 369 | } |
| 370 | |
| 371 | /* Special-purpose registers. */ |
| 372 | if (flags & PTHDB_FLAG_SPRS) |
| 373 | { |
| 374 | if (arch64) |
| 375 | { |
| 376 | if (!ptrace64aix (PTT_READ_SPRS, tid, |
| 377 | (unsigned long) &sprs64, 0, NULL)) |
| 378 | memset (&sprs64, 0, sizeof (sprs64)); |
| 379 | memcpy (&context->msr, &sprs64, sizeof(sprs64)); |
| 380 | } |
| 381 | else |
| 382 | { |
| 383 | if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) |
| 384 | memset (&sprs32, 0, sizeof (sprs32)); |
| 385 | memcpy (&context->msr, &sprs32, sizeof(sprs32)); |
| 386 | } |
| 387 | } |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | /* Write register function should be able to write requested context |
| 392 | information to specified debuggee's kernel thread id. |
| 393 | If successful return 0, else non-zero is returned. */ |
| 394 | |
| 395 | static int |
| 396 | pdc_write_regs (pthdb_user_t user, |
| 397 | pthdb_tid_t tid, |
| 398 | unsigned long long flags, |
| 399 | pthdb_context_t *context) |
| 400 | { |
| 401 | /* This function doesn't appear to be used, so we could probably |
| 402 | just return 0 here. HOWEVER, if it is not defined, the OS will |
| 403 | complain and several thread debug functions will fail. In case |
| 404 | this is needed, I have implemented what I think it should do, |
| 405 | however this code is untested. */ |
| 406 | |
| 407 | if (debug_aix_thread) |
| 408 | fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n", |
| 409 | (int) tid, hex_string (flags)); |
| 410 | |
| 411 | /* General-purpose registers. */ |
| 412 | if (flags & PTHDB_FLAG_GPRS) |
| 413 | { |
| 414 | if (arch64) |
| 415 | ptrace64aix (PTT_WRITE_GPRS, tid, |
| 416 | (unsigned long) context->gpr, 0, NULL); |
| 417 | else |
| 418 | ptrace32 (PTT_WRITE_GPRS, tid, (int *) context->gpr, 0, NULL); |
| 419 | } |
| 420 | |
| 421 | /* Floating-point registers. */ |
| 422 | if (flags & PTHDB_FLAG_FPRS) |
| 423 | { |
| 424 | ptrace32 (PTT_WRITE_FPRS, tid, (int *) context->fpr, 0, NULL); |
| 425 | } |
| 426 | |
| 427 | /* Special-purpose registers. */ |
| 428 | if (flags & PTHDB_FLAG_SPRS) |
| 429 | { |
| 430 | if (arch64) |
| 431 | { |
| 432 | ptrace64aix (PTT_WRITE_SPRS, tid, |
| 433 | (unsigned long) &context->msr, 0, NULL); |
| 434 | } |
| 435 | else |
| 436 | { |
| 437 | ptrace32 (PTT_WRITE_SPRS, tid, (void *) &context->msr, 0, NULL); |
| 438 | } |
| 439 | } |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | /* pthdb callback: read LEN bytes from process ADDR into BUF. */ |
| 444 | |
| 445 | static int |
| 446 | pdc_read_data (pthdb_user_t user, void *buf, |
| 447 | pthdb_addr_t addr, size_t len) |
| 448 | { |
| 449 | int status, ret; |
| 450 | |
| 451 | if (debug_aix_thread) |
| 452 | fprintf_unfiltered (gdb_stdlog, |
| 453 | "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
| 454 | user, (long) buf, hex_string (addr), len); |
| 455 | |
| 456 | status = target_read_memory (addr, buf, len); |
| 457 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; |
| 458 | |
| 459 | if (debug_aix_thread) |
| 460 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", |
| 461 | status, pd_status2str (ret)); |
| 462 | return ret; |
| 463 | } |
| 464 | |
| 465 | /* pthdb callback: write LEN bytes from BUF to process ADDR. */ |
| 466 | |
| 467 | static int |
| 468 | pdc_write_data (pthdb_user_t user, void *buf, |
| 469 | pthdb_addr_t addr, size_t len) |
| 470 | { |
| 471 | int status, ret; |
| 472 | |
| 473 | if (debug_aix_thread) |
| 474 | fprintf_unfiltered (gdb_stdlog, |
| 475 | "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
| 476 | user, (long) buf, hex_string (addr), len); |
| 477 | |
| 478 | status = target_write_memory (addr, buf, len); |
| 479 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; |
| 480 | |
| 481 | if (debug_aix_thread) |
| 482 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", status, |
| 483 | pd_status2str (ret)); |
| 484 | return ret; |
| 485 | } |
| 486 | |
| 487 | /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it |
| 488 | in BUFP. */ |
| 489 | |
| 490 | static int |
| 491 | pdc_alloc (pthdb_user_t user, size_t len, void **bufp) |
| 492 | { |
| 493 | if (debug_aix_thread) |
| 494 | fprintf_unfiltered (gdb_stdlog, |
| 495 | "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n", |
| 496 | user, len, (long) bufp); |
| 497 | *bufp = xmalloc (len); |
| 498 | if (debug_aix_thread) |
| 499 | fprintf_unfiltered (gdb_stdlog, |
| 500 | " malloc returned 0x%lx\n", (long) *bufp); |
| 501 | |
| 502 | /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never |
| 503 | be returned. */ |
| 504 | |
| 505 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
| 506 | } |
| 507 | |
| 508 | /* pthdb callback: reallocate BUF, which was allocated by the alloc or |
| 509 | realloc callback, so that it contains LEN bytes, and store a |
| 510 | pointer to the result in BUFP. */ |
| 511 | |
| 512 | static int |
| 513 | pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp) |
| 514 | { |
| 515 | if (debug_aix_thread) |
| 516 | fprintf_unfiltered (gdb_stdlog, |
| 517 | "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n", |
| 518 | user, (long) buf, len, (long) bufp); |
| 519 | *bufp = xrealloc (buf, len); |
| 520 | if (debug_aix_thread) |
| 521 | fprintf_unfiltered (gdb_stdlog, |
| 522 | " realloc returned 0x%lx\n", (long) *bufp); |
| 523 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
| 524 | } |
| 525 | |
| 526 | /* pthdb callback: free BUF, which was allocated by the alloc or |
| 527 | realloc callback. */ |
| 528 | |
| 529 | static int |
| 530 | pdc_dealloc (pthdb_user_t user, void *buf) |
| 531 | { |
| 532 | if (debug_aix_thread) |
| 533 | fprintf_unfiltered (gdb_stdlog, |
| 534 | "pdc_free (user = %ld, buf = 0x%lx)\n", user, |
| 535 | (long) buf); |
| 536 | xfree (buf); |
| 537 | return PDC_SUCCESS; |
| 538 | } |
| 539 | |
| 540 | /* Return a printable representation of pthread STATE. */ |
| 541 | |
| 542 | static char * |
| 543 | state2str (pthdb_state_t state) |
| 544 | { |
| 545 | switch (state) |
| 546 | { |
| 547 | case PST_IDLE: |
| 548 | /* i18n: Like "Thread-Id %d, [state] idle" */ |
| 549 | return _("idle"); /* being created */ |
| 550 | case PST_RUN: |
| 551 | /* i18n: Like "Thread-Id %d, [state] running" */ |
| 552 | return _("running"); /* running */ |
| 553 | case PST_SLEEP: |
| 554 | /* i18n: Like "Thread-Id %d, [state] sleeping" */ |
| 555 | return _("sleeping"); /* awaiting an event */ |
| 556 | case PST_READY: |
| 557 | /* i18n: Like "Thread-Id %d, [state] ready" */ |
| 558 | return _("ready"); /* runnable */ |
| 559 | case PST_TERM: |
| 560 | /* i18n: Like "Thread-Id %d, [state] finished" */ |
| 561 | return _("finished"); /* awaiting a join/detach */ |
| 562 | default: |
| 563 | /* i18n: Like "Thread-Id %d, [state] unknown" */ |
| 564 | return _("unknown"); |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | /* qsort() comparison function for sorting pd_thread structs by pthid. */ |
| 569 | |
| 570 | static int |
| 571 | pcmp (const void *p1v, const void *p2v) |
| 572 | { |
| 573 | struct pd_thread *p1 = (struct pd_thread *) p1v; |
| 574 | struct pd_thread *p2 = (struct pd_thread *) p2v; |
| 575 | return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid; |
| 576 | } |
| 577 | |
| 578 | /* iterate_over_threads() callback for counting GDB threads. */ |
| 579 | |
| 580 | static int |
| 581 | giter_count (struct thread_info *thread, void *countp) |
| 582 | { |
| 583 | (*(int *) countp)++; |
| 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | /* iterate_over_threads() callback for accumulating GDB thread pids. */ |
| 588 | |
| 589 | static int |
| 590 | giter_accum (struct thread_info *thread, void *bufp) |
| 591 | { |
| 592 | **(struct thread_info ***) bufp = thread; |
| 593 | (*(struct thread_info ***) bufp)++; |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | /* ptid comparison function */ |
| 598 | |
| 599 | static int |
| 600 | ptid_cmp (ptid_t ptid1, ptid_t ptid2) |
| 601 | { |
| 602 | int pid1, pid2; |
| 603 | |
| 604 | if (ptid_get_pid (ptid1) < ptid_get_pid (ptid2)) |
| 605 | return -1; |
| 606 | else if (ptid_get_pid (ptid1) > ptid_get_pid (ptid2)) |
| 607 | return 1; |
| 608 | else if (ptid_get_tid (ptid1) < ptid_get_tid (ptid2)) |
| 609 | return -1; |
| 610 | else if (ptid_get_tid (ptid1) > ptid_get_tid (ptid2)) |
| 611 | return 1; |
| 612 | else if (ptid_get_lwp (ptid1) < ptid_get_lwp (ptid2)) |
| 613 | return -1; |
| 614 | else if (ptid_get_lwp (ptid1) > ptid_get_lwp (ptid2)) |
| 615 | return 1; |
| 616 | else |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | /* qsort() comparison function for sorting thread_info structs by pid. */ |
| 621 | |
| 622 | static int |
| 623 | gcmp (const void *t1v, const void *t2v) |
| 624 | { |
| 625 | struct thread_info *t1 = *(struct thread_info **) t1v; |
| 626 | struct thread_info *t2 = *(struct thread_info **) t2v; |
| 627 | return ptid_cmp (t1->ptid, t2->ptid); |
| 628 | } |
| 629 | |
| 630 | /* Search through the list of all kernel threads for the thread |
| 631 | that has stopped on a SIGTRAP signal, and return its TID. |
| 632 | Return 0 if none found. */ |
| 633 | |
| 634 | static pthdb_tid_t |
| 635 | get_signaled_thread (void) |
| 636 | { |
| 637 | struct thrdsinfo64 thrinf; |
| 638 | pthdb_tid_t ktid = 0; |
| 639 | int result = 0; |
| 640 | |
| 641 | /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */ |
| 642 | extern int getthrds (pid_t, struct thrdsinfo64 *, |
| 643 | int, pthdb_tid_t *, int); |
| 644 | |
| 645 | while (1) |
| 646 | { |
| 647 | if (getthrds (PIDGET (inferior_ptid), &thrinf, |
| 648 | sizeof (thrinf), &ktid, 1) != 1) |
| 649 | break; |
| 650 | |
| 651 | if (thrinf.ti_cursig == SIGTRAP) |
| 652 | return thrinf.ti_tid; |
| 653 | } |
| 654 | |
| 655 | /* Didn't find any thread stopped on a SIGTRAP signal. */ |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | /* Synchronize GDB's thread list with libpthdebug's. |
| 660 | |
| 661 | There are some benefits of doing this every time the inferior stops: |
| 662 | |
| 663 | - allows users to run thread-specific commands without needing to |
| 664 | run "info threads" first |
| 665 | |
| 666 | - helps pthdb_tid_pthread() work properly (see "libpthdebug |
| 667 | peculiarities" at the top of this module) |
| 668 | |
| 669 | - simplifies the demands placed on libpthdebug, which seems to |
| 670 | have difficulty with certain call patterns */ |
| 671 | |
| 672 | static void |
| 673 | sync_threadlists (void) |
| 674 | { |
| 675 | int cmd, status, infpid; |
| 676 | int pcount, psize, pi, gcount, gi; |
| 677 | struct pd_thread *pbuf; |
| 678 | struct thread_info **gbuf, **g, *thread; |
| 679 | pthdb_pthread_t pdtid; |
| 680 | pthread_t pthid; |
| 681 | pthdb_tid_t tid; |
| 682 | |
| 683 | /* Accumulate an array of libpthdebug threads sorted by pthread id. */ |
| 684 | |
| 685 | pcount = 0; |
| 686 | psize = 1; |
| 687 | pbuf = (struct pd_thread *) xmalloc (psize * sizeof *pbuf); |
| 688 | |
| 689 | for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT) |
| 690 | { |
| 691 | status = pthdb_pthread (pd_session, &pdtid, cmd); |
| 692 | if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD) |
| 693 | break; |
| 694 | |
| 695 | status = pthdb_pthread_ptid (pd_session, pdtid, &pthid); |
| 696 | if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID) |
| 697 | continue; |
| 698 | |
| 699 | if (pcount == psize) |
| 700 | { |
| 701 | psize *= 2; |
| 702 | pbuf = (struct pd_thread *) xrealloc (pbuf, |
| 703 | psize * sizeof *pbuf); |
| 704 | } |
| 705 | pbuf[pcount].pdtid = pdtid; |
| 706 | pbuf[pcount].pthid = pthid; |
| 707 | pcount++; |
| 708 | } |
| 709 | |
| 710 | for (pi = 0; pi < pcount; pi++) |
| 711 | { |
| 712 | status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid); |
| 713 | if (status != PTHDB_SUCCESS) |
| 714 | tid = PTHDB_INVALID_TID; |
| 715 | pbuf[pi].tid = tid; |
| 716 | } |
| 717 | |
| 718 | qsort (pbuf, pcount, sizeof *pbuf, pcmp); |
| 719 | |
| 720 | /* Accumulate an array of GDB threads sorted by pid. */ |
| 721 | |
| 722 | gcount = 0; |
| 723 | iterate_over_threads (giter_count, &gcount); |
| 724 | g = gbuf = (struct thread_info **) xmalloc (gcount * sizeof *gbuf); |
| 725 | iterate_over_threads (giter_accum, &g); |
| 726 | qsort (gbuf, gcount, sizeof *gbuf, gcmp); |
| 727 | |
| 728 | /* Apply differences between the two arrays to GDB's thread list. */ |
| 729 | |
| 730 | infpid = PIDGET (inferior_ptid); |
| 731 | for (pi = gi = 0; pi < pcount || gi < gcount;) |
| 732 | { |
| 733 | if (pi == pcount) |
| 734 | { |
| 735 | delete_thread (gbuf[gi]->ptid); |
| 736 | gi++; |
| 737 | } |
| 738 | else if (gi == gcount) |
| 739 | { |
| 740 | thread = add_thread (BUILD_THREAD (pbuf[pi].pthid, infpid)); |
| 741 | thread->private = xmalloc (sizeof (struct private_thread_info)); |
| 742 | thread->private->pdtid = pbuf[pi].pdtid; |
| 743 | thread->private->tid = pbuf[pi].tid; |
| 744 | pi++; |
| 745 | } |
| 746 | else |
| 747 | { |
| 748 | ptid_t pptid, gptid; |
| 749 | int cmp_result; |
| 750 | |
| 751 | pptid = BUILD_THREAD (pbuf[pi].pthid, infpid); |
| 752 | gptid = gbuf[gi]->ptid; |
| 753 | pdtid = pbuf[pi].pdtid; |
| 754 | tid = pbuf[pi].tid; |
| 755 | |
| 756 | cmp_result = ptid_cmp (pptid, gptid); |
| 757 | |
| 758 | if (cmp_result == 0) |
| 759 | { |
| 760 | gbuf[gi]->private->pdtid = pdtid; |
| 761 | gbuf[gi]->private->tid = tid; |
| 762 | pi++; |
| 763 | gi++; |
| 764 | } |
| 765 | else if (cmp_result > 0) |
| 766 | { |
| 767 | delete_thread (gptid); |
| 768 | gi++; |
| 769 | } |
| 770 | else |
| 771 | { |
| 772 | thread = add_thread (pptid); |
| 773 | thread->private = xmalloc (sizeof (struct private_thread_info)); |
| 774 | thread->private->pdtid = pdtid; |
| 775 | thread->private->tid = tid; |
| 776 | pi++; |
| 777 | } |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | xfree (pbuf); |
| 782 | xfree (gbuf); |
| 783 | } |
| 784 | |
| 785 | /* Iterate_over_threads() callback for locating a thread, using |
| 786 | the TID of its associated kernel thread. */ |
| 787 | |
| 788 | static int |
| 789 | iter_tid (struct thread_info *thread, void *tidp) |
| 790 | { |
| 791 | const pthdb_tid_t tid = *(pthdb_tid_t *)tidp; |
| 792 | |
| 793 | return (thread->private->tid == tid); |
| 794 | } |
| 795 | |
| 796 | /* Synchronize libpthdebug's state with the inferior and with GDB, |
| 797 | generate a composite process/thread <pid> for the current thread, |
| 798 | set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */ |
| 799 | |
| 800 | static ptid_t |
| 801 | pd_update (int set_infpid) |
| 802 | { |
| 803 | int status; |
| 804 | ptid_t ptid; |
| 805 | pthdb_tid_t tid; |
| 806 | struct thread_info *thread = NULL; |
| 807 | |
| 808 | if (!pd_active) |
| 809 | return inferior_ptid; |
| 810 | |
| 811 | status = pthdb_session_update (pd_session); |
| 812 | if (status != PTHDB_SUCCESS) |
| 813 | return inferior_ptid; |
| 814 | |
| 815 | sync_threadlists (); |
| 816 | |
| 817 | /* Define "current thread" as one that just received a trap signal. */ |
| 818 | |
| 819 | tid = get_signaled_thread (); |
| 820 | if (tid != 0) |
| 821 | thread = iterate_over_threads (iter_tid, &tid); |
| 822 | if (!thread) |
| 823 | ptid = inferior_ptid; |
| 824 | else |
| 825 | { |
| 826 | ptid = thread->ptid; |
| 827 | if (set_infpid) |
| 828 | inferior_ptid = ptid; |
| 829 | } |
| 830 | return ptid; |
| 831 | } |
| 832 | |
| 833 | /* Try to start debugging threads in the current process. |
| 834 | If successful and SET_INFPID, set inferior_ptid to reflect the |
| 835 | current thread. */ |
| 836 | |
| 837 | static ptid_t |
| 838 | pd_activate (int set_infpid) |
| 839 | { |
| 840 | int status; |
| 841 | |
| 842 | status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT, |
| 843 | PTHDB_FLAG_REGS, &pd_callbacks, |
| 844 | &pd_session); |
| 845 | if (status != PTHDB_SUCCESS) |
| 846 | { |
| 847 | return inferior_ptid; |
| 848 | } |
| 849 | pd_active = 1; |
| 850 | return pd_update (set_infpid); |
| 851 | } |
| 852 | |
| 853 | /* Undo the effects of pd_activate(). */ |
| 854 | |
| 855 | static void |
| 856 | pd_deactivate (void) |
| 857 | { |
| 858 | if (!pd_active) |
| 859 | return; |
| 860 | pthdb_session_destroy (pd_session); |
| 861 | |
| 862 | pid_to_prc (&inferior_ptid); |
| 863 | pd_active = 0; |
| 864 | } |
| 865 | |
| 866 | /* An object file has just been loaded. Check whether the current |
| 867 | application is pthreaded, and if so, prepare for thread debugging. */ |
| 868 | |
| 869 | static void |
| 870 | pd_enable (void) |
| 871 | { |
| 872 | int status; |
| 873 | char *stub_name; |
| 874 | struct minimal_symbol *ms; |
| 875 | |
| 876 | /* Don't initialize twice. */ |
| 877 | if (pd_able) |
| 878 | return; |
| 879 | |
| 880 | /* Check application word size. */ |
| 881 | arch64 = register_size (current_gdbarch, 0) == 8; |
| 882 | |
| 883 | /* Check whether the application is pthreaded. */ |
| 884 | stub_name = NULL; |
| 885 | status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS, |
| 886 | &pd_callbacks, &stub_name); |
| 887 | if ((status != PTHDB_SUCCESS && |
| 888 | status != PTHDB_NOT_PTHREADED) || !stub_name) |
| 889 | return; |
| 890 | |
| 891 | /* Set a breakpoint on the returned stub function. */ |
| 892 | if (!(ms = lookup_minimal_symbol (stub_name, NULL, NULL))) |
| 893 | return; |
| 894 | pd_brk_addr = SYMBOL_VALUE_ADDRESS (ms); |
| 895 | if (!create_thread_event_breakpoint (pd_brk_addr)) |
| 896 | return; |
| 897 | |
| 898 | /* Prepare for thread debugging. */ |
| 899 | base_target = current_target; |
| 900 | push_target (&aix_thread_ops); |
| 901 | pd_able = 1; |
| 902 | |
| 903 | /* If we're debugging a core file or an attached inferior, the |
| 904 | pthread library may already have been initialized, so try to |
| 905 | activate thread debugging. */ |
| 906 | pd_activate (1); |
| 907 | } |
| 908 | |
| 909 | /* Undo the effects of pd_enable(). */ |
| 910 | |
| 911 | static void |
| 912 | pd_disable (void) |
| 913 | { |
| 914 | if (!pd_able) |
| 915 | return; |
| 916 | if (pd_active) |
| 917 | pd_deactivate (); |
| 918 | pd_able = 0; |
| 919 | unpush_target (&aix_thread_ops); |
| 920 | } |
| 921 | |
| 922 | /* new_objfile observer callback. |
| 923 | |
| 924 | If OBJFILE is non-null, check whether a threaded application is |
| 925 | being debugged, and if so, prepare for thread debugging. |
| 926 | |
| 927 | If OBJFILE is null, stop debugging threads. */ |
| 928 | |
| 929 | static void |
| 930 | new_objfile (struct objfile *objfile) |
| 931 | { |
| 932 | if (objfile) |
| 933 | pd_enable (); |
| 934 | else |
| 935 | pd_disable (); |
| 936 | } |
| 937 | |
| 938 | /* Attach to process specified by ARGS. */ |
| 939 | |
| 940 | static void |
| 941 | aix_thread_attach (struct target_ops *ops, char *args, int from_tty) |
| 942 | { |
| 943 | base_target.to_attach (&base_target, args, from_tty); |
| 944 | pd_activate (1); |
| 945 | } |
| 946 | |
| 947 | /* Detach from the process attached to by aix_thread_attach(). */ |
| 948 | |
| 949 | static void |
| 950 | aix_thread_detach (struct target_ops *ops, char *args, int from_tty) |
| 951 | { |
| 952 | pd_disable (); |
| 953 | base_target.to_detach (&base_target, args, from_tty); |
| 954 | } |
| 955 | |
| 956 | /* Tell the inferior process to continue running thread PID if != -1 |
| 957 | and all threads otherwise. */ |
| 958 | |
| 959 | static void |
| 960 | aix_thread_resume (ptid_t ptid, int step, enum target_signal sig) |
| 961 | { |
| 962 | struct thread_info *thread; |
| 963 | pthdb_tid_t tid[2]; |
| 964 | |
| 965 | if (!PD_TID (ptid)) |
| 966 | { |
| 967 | struct cleanup *cleanup = save_inferior_ptid (); |
| 968 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); |
| 969 | base_target.to_resume (ptid, step, sig); |
| 970 | do_cleanups (cleanup); |
| 971 | } |
| 972 | else |
| 973 | { |
| 974 | thread = find_thread_pid (ptid); |
| 975 | if (!thread) |
| 976 | error (_("aix-thread resume: unknown pthread %ld"), |
| 977 | TIDGET (ptid)); |
| 978 | |
| 979 | tid[0] = thread->private->tid; |
| 980 | if (tid[0] == PTHDB_INVALID_TID) |
| 981 | error (_("aix-thread resume: no tid for pthread %ld"), |
| 982 | TIDGET (ptid)); |
| 983 | tid[1] = 0; |
| 984 | |
| 985 | if (arch64) |
| 986 | ptrace64aix (PTT_CONTINUE, tid[0], 1, |
| 987 | target_signal_to_host (sig), (void *) tid); |
| 988 | else |
| 989 | ptrace32 (PTT_CONTINUE, tid[0], (int *) 1, |
| 990 | target_signal_to_host (sig), (void *) tid); |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | /* Wait for thread/process ID if != -1 or for any thread otherwise. |
| 995 | If an error occurs, return -1, else return the pid of the stopped |
| 996 | thread. */ |
| 997 | |
| 998 | static ptid_t |
| 999 | aix_thread_wait (ptid_t ptid, struct target_waitstatus *status) |
| 1000 | { |
| 1001 | struct cleanup *cleanup = save_inferior_ptid (); |
| 1002 | |
| 1003 | pid_to_prc (&ptid); |
| 1004 | |
| 1005 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); |
| 1006 | ptid = base_target.to_wait (ptid, status); |
| 1007 | do_cleanups (cleanup); |
| 1008 | |
| 1009 | if (PIDGET (ptid) == -1) |
| 1010 | return pid_to_ptid (-1); |
| 1011 | |
| 1012 | /* Check whether libpthdebug might be ready to be initialized. */ |
| 1013 | if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED |
| 1014 | && status->value.sig == TARGET_SIGNAL_TRAP) |
| 1015 | { |
| 1016 | struct regcache *regcache = get_thread_regcache (ptid); |
| 1017 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1018 | |
| 1019 | if (regcache_read_pc (regcache) |
| 1020 | - gdbarch_decr_pc_after_break (gdbarch) == pd_brk_addr) |
| 1021 | return pd_activate (0); |
| 1022 | } |
| 1023 | |
| 1024 | return pd_update (0); |
| 1025 | } |
| 1026 | |
| 1027 | /* Record that the 64-bit general-purpose registers contain VALS. */ |
| 1028 | |
| 1029 | static void |
| 1030 | supply_gprs64 (struct regcache *regcache, uint64_t *vals) |
| 1031 | { |
| 1032 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache)); |
| 1033 | int regno; |
| 1034 | |
| 1035 | for (regno = 0; regno < ppc_num_gprs; regno++) |
| 1036 | regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + regno, |
| 1037 | (char *) (vals + regno)); |
| 1038 | } |
| 1039 | |
| 1040 | /* Record that 32-bit register REGNO contains VAL. */ |
| 1041 | |
| 1042 | static void |
| 1043 | supply_reg32 (struct regcache *regcache, int regno, uint32_t val) |
| 1044 | { |
| 1045 | regcache_raw_supply (regcache, regno, (char *) &val); |
| 1046 | } |
| 1047 | |
| 1048 | /* Record that the floating-point registers contain VALS. */ |
| 1049 | |
| 1050 | static void |
| 1051 | supply_fprs (struct regcache *regcache, double *vals) |
| 1052 | { |
| 1053 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1054 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1055 | int regno; |
| 1056 | |
| 1057 | /* This function should never be called on architectures without |
| 1058 | floating-point registers. */ |
| 1059 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
| 1060 | |
| 1061 | for (regno = 0; regno < ppc_num_fprs; regno++) |
| 1062 | regcache_raw_supply (regcache, regno + tdep->ppc_fp0_regnum, |
| 1063 | (char *) (vals + regno)); |
| 1064 | } |
| 1065 | |
| 1066 | /* Predicate to test whether given register number is a "special" register. */ |
| 1067 | static int |
| 1068 | special_register_p (struct gdbarch *gdbarch, int regno) |
| 1069 | { |
| 1070 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1071 | |
| 1072 | return regno == gdbarch_pc_regnum (gdbarch) |
| 1073 | || regno == tdep->ppc_ps_regnum |
| 1074 | || regno == tdep->ppc_cr_regnum |
| 1075 | || regno == tdep->ppc_lr_regnum |
| 1076 | || regno == tdep->ppc_ctr_regnum |
| 1077 | || regno == tdep->ppc_xer_regnum |
| 1078 | || (tdep->ppc_fpscr_regnum >= 0 && regno == tdep->ppc_fpscr_regnum) |
| 1079 | || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum); |
| 1080 | } |
| 1081 | |
| 1082 | |
| 1083 | /* Record that the special registers contain the specified 64-bit and |
| 1084 | 32-bit values. */ |
| 1085 | |
| 1086 | static void |
| 1087 | supply_sprs64 (struct regcache *regcache, |
| 1088 | uint64_t iar, uint64_t msr, uint32_t cr, |
| 1089 | uint64_t lr, uint64_t ctr, uint32_t xer, |
| 1090 | uint32_t fpscr) |
| 1091 | { |
| 1092 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1093 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1094 | |
| 1095 | regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), |
| 1096 | (char *) &iar); |
| 1097 | regcache_raw_supply (regcache, tdep->ppc_ps_regnum, (char *) &msr); |
| 1098 | regcache_raw_supply (regcache, tdep->ppc_cr_regnum, (char *) &cr); |
| 1099 | regcache_raw_supply (regcache, tdep->ppc_lr_regnum, (char *) &lr); |
| 1100 | regcache_raw_supply (regcache, tdep->ppc_ctr_regnum, (char *) &ctr); |
| 1101 | regcache_raw_supply (regcache, tdep->ppc_xer_regnum, (char *) &xer); |
| 1102 | if (tdep->ppc_fpscr_regnum >= 0) |
| 1103 | regcache_raw_supply (regcache, tdep->ppc_fpscr_regnum, |
| 1104 | (char *) &fpscr); |
| 1105 | } |
| 1106 | |
| 1107 | /* Record that the special registers contain the specified 32-bit |
| 1108 | values. */ |
| 1109 | |
| 1110 | static void |
| 1111 | supply_sprs32 (struct regcache *regcache, |
| 1112 | uint32_t iar, uint32_t msr, uint32_t cr, |
| 1113 | uint32_t lr, uint32_t ctr, uint32_t xer, |
| 1114 | uint32_t fpscr) |
| 1115 | { |
| 1116 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1117 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1118 | |
| 1119 | regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), |
| 1120 | (char *) &iar); |
| 1121 | regcache_raw_supply (regcache, tdep->ppc_ps_regnum, (char *) &msr); |
| 1122 | regcache_raw_supply (regcache, tdep->ppc_cr_regnum, (char *) &cr); |
| 1123 | regcache_raw_supply (regcache, tdep->ppc_lr_regnum, (char *) &lr); |
| 1124 | regcache_raw_supply (regcache, tdep->ppc_ctr_regnum, (char *) &ctr); |
| 1125 | regcache_raw_supply (regcache, tdep->ppc_xer_regnum, (char *) &xer); |
| 1126 | if (tdep->ppc_fpscr_regnum >= 0) |
| 1127 | regcache_raw_supply (regcache, tdep->ppc_fpscr_regnum, |
| 1128 | (char *) &fpscr); |
| 1129 | } |
| 1130 | |
| 1131 | /* Fetch all registers from pthread PDTID, which doesn't have a kernel |
| 1132 | thread. |
| 1133 | |
| 1134 | There's no way to query a single register from a non-kernel |
| 1135 | pthread, so there's no need for a single-register version of this |
| 1136 | function. */ |
| 1137 | |
| 1138 | static void |
| 1139 | fetch_regs_user_thread (struct regcache *regcache, pthdb_pthread_t pdtid) |
| 1140 | { |
| 1141 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1142 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1143 | int status, i; |
| 1144 | pthdb_context_t ctx; |
| 1145 | |
| 1146 | if (debug_aix_thread) |
| 1147 | fprintf_unfiltered (gdb_stdlog, |
| 1148 | "fetch_regs_user_thread %lx\n", (long) pdtid); |
| 1149 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
| 1150 | if (status != PTHDB_SUCCESS) |
| 1151 | error (_("aix-thread: fetch_registers: pthdb_pthread_context returned %s"), |
| 1152 | pd_status2str (status)); |
| 1153 | |
| 1154 | /* General-purpose registers. */ |
| 1155 | |
| 1156 | if (arch64) |
| 1157 | supply_gprs64 (regcache, ctx.gpr); |
| 1158 | else |
| 1159 | for (i = 0; i < ppc_num_gprs; i++) |
| 1160 | supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, ctx.gpr[i]); |
| 1161 | |
| 1162 | /* Floating-point registers. */ |
| 1163 | |
| 1164 | if (ppc_floating_point_unit_p (gdbarch)) |
| 1165 | supply_fprs (regcache, ctx.fpr); |
| 1166 | |
| 1167 | /* Special registers. */ |
| 1168 | |
| 1169 | if (arch64) |
| 1170 | supply_sprs64 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, |
| 1171 | ctx.xer, ctx.fpscr); |
| 1172 | else |
| 1173 | supply_sprs32 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, |
| 1174 | ctx.xer, ctx.fpscr); |
| 1175 | } |
| 1176 | |
| 1177 | /* Fetch register REGNO if != -1 or all registers otherwise from |
| 1178 | kernel thread TID. |
| 1179 | |
| 1180 | AIX provides a way to query all of a kernel thread's GPRs, FPRs, or |
| 1181 | SPRs, but there's no way to query individual registers within those |
| 1182 | groups. Therefore, if REGNO != -1, this function fetches an entire |
| 1183 | group. |
| 1184 | |
| 1185 | Unfortunately, kernel thread register queries often fail with |
| 1186 | EPERM, indicating that the thread is in kernel space. This breaks |
| 1187 | backtraces of threads other than the current one. To make that |
| 1188 | breakage obvious without throwing an error to top level (which is |
| 1189 | bad e.g. during "info threads" output), zero registers that can't |
| 1190 | be retrieved. */ |
| 1191 | |
| 1192 | static void |
| 1193 | fetch_regs_kernel_thread (struct regcache *regcache, int regno, |
| 1194 | pthdb_tid_t tid) |
| 1195 | { |
| 1196 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1197 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1198 | uint64_t gprs64[ppc_num_gprs]; |
| 1199 | uint32_t gprs32[ppc_num_gprs]; |
| 1200 | double fprs[ppc_num_fprs]; |
| 1201 | struct ptxsprs sprs64; |
| 1202 | struct ptsprs sprs32; |
| 1203 | int i; |
| 1204 | |
| 1205 | if (debug_aix_thread) |
| 1206 | fprintf_unfiltered (gdb_stdlog, |
| 1207 | "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n", |
| 1208 | (long) tid, regno, arch64); |
| 1209 | |
| 1210 | /* General-purpose registers. */ |
| 1211 | if (regno == -1 |
| 1212 | || (tdep->ppc_gp0_regnum <= regno |
| 1213 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)) |
| 1214 | { |
| 1215 | if (arch64) |
| 1216 | { |
| 1217 | if (!ptrace64aix (PTT_READ_GPRS, tid, |
| 1218 | (unsigned long) gprs64, 0, NULL)) |
| 1219 | memset (gprs64, 0, sizeof (gprs64)); |
| 1220 | supply_gprs64 (regcache, gprs64); |
| 1221 | } |
| 1222 | else |
| 1223 | { |
| 1224 | if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) |
| 1225 | memset (gprs32, 0, sizeof (gprs32)); |
| 1226 | for (i = 0; i < ppc_num_gprs; i++) |
| 1227 | supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, gprs32[i]); |
| 1228 | } |
| 1229 | } |
| 1230 | |
| 1231 | /* Floating-point registers. */ |
| 1232 | |
| 1233 | if (ppc_floating_point_unit_p (gdbarch) |
| 1234 | && (regno == -1 |
| 1235 | || (regno >= tdep->ppc_fp0_regnum |
| 1236 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) |
| 1237 | { |
| 1238 | if (!ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL)) |
| 1239 | memset (fprs, 0, sizeof (fprs)); |
| 1240 | supply_fprs (regcache, fprs); |
| 1241 | } |
| 1242 | |
| 1243 | /* Special-purpose registers. */ |
| 1244 | |
| 1245 | if (regno == -1 || special_register_p (gdbarch, regno)) |
| 1246 | { |
| 1247 | if (arch64) |
| 1248 | { |
| 1249 | if (!ptrace64aix (PTT_READ_SPRS, tid, |
| 1250 | (unsigned long) &sprs64, 0, NULL)) |
| 1251 | memset (&sprs64, 0, sizeof (sprs64)); |
| 1252 | supply_sprs64 (regcache, sprs64.pt_iar, sprs64.pt_msr, |
| 1253 | sprs64.pt_cr, sprs64.pt_lr, sprs64.pt_ctr, |
| 1254 | sprs64.pt_xer, sprs64.pt_fpscr); |
| 1255 | } |
| 1256 | else |
| 1257 | { |
| 1258 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1259 | |
| 1260 | if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) |
| 1261 | memset (&sprs32, 0, sizeof (sprs32)); |
| 1262 | supply_sprs32 (regcache, sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr, |
| 1263 | sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer, |
| 1264 | sprs32.pt_fpscr); |
| 1265 | |
| 1266 | if (tdep->ppc_mq_regnum >= 0) |
| 1267 | regcache_raw_supply (regcache, tdep->ppc_mq_regnum, |
| 1268 | (char *) &sprs32.pt_mq); |
| 1269 | } |
| 1270 | } |
| 1271 | } |
| 1272 | |
| 1273 | /* Fetch register REGNO if != -1 or all registers otherwise in the |
| 1274 | thread/process specified by inferior_ptid. */ |
| 1275 | |
| 1276 | static void |
| 1277 | aix_thread_fetch_registers (struct regcache *regcache, int regno) |
| 1278 | { |
| 1279 | struct thread_info *thread; |
| 1280 | pthdb_tid_t tid; |
| 1281 | |
| 1282 | if (!PD_TID (inferior_ptid)) |
| 1283 | base_target.to_fetch_registers (regcache, regno); |
| 1284 | else |
| 1285 | { |
| 1286 | thread = find_thread_pid (inferior_ptid); |
| 1287 | tid = thread->private->tid; |
| 1288 | |
| 1289 | if (tid == PTHDB_INVALID_TID) |
| 1290 | fetch_regs_user_thread (regcache, thread->private->pdtid); |
| 1291 | else |
| 1292 | fetch_regs_kernel_thread (regcache, regno, tid); |
| 1293 | } |
| 1294 | } |
| 1295 | |
| 1296 | /* Store the gp registers into an array of uint32_t or uint64_t. */ |
| 1297 | |
| 1298 | static void |
| 1299 | fill_gprs64 (const struct regcache *regcache, uint64_t *vals) |
| 1300 | { |
| 1301 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache)); |
| 1302 | int regno; |
| 1303 | |
| 1304 | for (regno = 0; regno < ppc_num_gprs; regno++) |
| 1305 | if (regcache_valid_p (regcache, tdep->ppc_gp0_regnum + regno)) |
| 1306 | regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + regno, |
| 1307 | vals + regno); |
| 1308 | } |
| 1309 | |
| 1310 | static void |
| 1311 | fill_gprs32 (const struct regcache *regcache, uint32_t *vals) |
| 1312 | { |
| 1313 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache)); |
| 1314 | int regno; |
| 1315 | |
| 1316 | for (regno = 0; regno < ppc_num_gprs; regno++) |
| 1317 | if (regcache_valid_p (regcache, tdep->ppc_gp0_regnum + regno)) |
| 1318 | regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + regno, |
| 1319 | vals + regno); |
| 1320 | } |
| 1321 | |
| 1322 | /* Store the floating point registers into a double array. */ |
| 1323 | static void |
| 1324 | fill_fprs (const struct regcache *regcache, double *vals) |
| 1325 | { |
| 1326 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1327 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1328 | int regno; |
| 1329 | |
| 1330 | /* This function should never be called on architectures without |
| 1331 | floating-point registers. */ |
| 1332 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
| 1333 | |
| 1334 | for (regno = tdep->ppc_fp0_regnum; |
| 1335 | regno < tdep->ppc_fp0_regnum + ppc_num_fprs; |
| 1336 | regno++) |
| 1337 | if (regcache_valid_p (regcache, regno)) |
| 1338 | regcache_raw_collect (regcache, regno, vals + regno); |
| 1339 | } |
| 1340 | |
| 1341 | /* Store the special registers into the specified 64-bit and 32-bit |
| 1342 | locations. */ |
| 1343 | |
| 1344 | static void |
| 1345 | fill_sprs64 (const struct regcache *regcache, |
| 1346 | uint64_t *iar, uint64_t *msr, uint32_t *cr, |
| 1347 | uint64_t *lr, uint64_t *ctr, uint32_t *xer, |
| 1348 | uint32_t *fpscr) |
| 1349 | { |
| 1350 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1351 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1352 | |
| 1353 | /* Verify that the size of the size of the IAR buffer is the |
| 1354 | same as the raw size of the PC (in the register cache). If |
| 1355 | they're not, then either GDB has been built incorrectly, or |
| 1356 | there's some other kind of internal error. To be really safe, |
| 1357 | we should check all of the sizes. */ |
| 1358 | gdb_assert (sizeof (*iar) == register_size |
| 1359 | (gdbarch, gdbarch_pc_regnum (gdbarch))); |
| 1360 | |
| 1361 | if (regcache_valid_p (regcache, gdbarch_pc_regnum (gdbarch))) |
| 1362 | regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), iar); |
| 1363 | if (regcache_valid_p (regcache, tdep->ppc_ps_regnum)) |
| 1364 | regcache_raw_collect (regcache, tdep->ppc_ps_regnum, msr); |
| 1365 | if (regcache_valid_p (regcache, tdep->ppc_cr_regnum)) |
| 1366 | regcache_raw_collect (regcache, tdep->ppc_cr_regnum, cr); |
| 1367 | if (regcache_valid_p (regcache, tdep->ppc_lr_regnum)) |
| 1368 | regcache_raw_collect (regcache, tdep->ppc_lr_regnum, lr); |
| 1369 | if (regcache_valid_p (regcache, tdep->ppc_ctr_regnum)) |
| 1370 | regcache_raw_collect (regcache, tdep->ppc_ctr_regnum, ctr); |
| 1371 | if (regcache_valid_p (regcache, tdep->ppc_xer_regnum)) |
| 1372 | regcache_raw_collect (regcache, tdep->ppc_xer_regnum, xer); |
| 1373 | if (tdep->ppc_fpscr_regnum >= 0 |
| 1374 | && regcache_valid_p (regcache, tdep->ppc_fpscr_regnum)) |
| 1375 | regcache_raw_collect (regcache, tdep->ppc_fpscr_regnum, fpscr); |
| 1376 | } |
| 1377 | |
| 1378 | static void |
| 1379 | fill_sprs32 (const struct regcache *regcache, |
| 1380 | uint32_t *iar, uint32_t *msr, uint32_t *cr, |
| 1381 | uint32_t *lr, uint32_t *ctr, uint32_t *xer, |
| 1382 | uint32_t *fpscr) |
| 1383 | { |
| 1384 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1385 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1386 | |
| 1387 | /* Verify that the size of the size of the IAR buffer is the |
| 1388 | same as the raw size of the PC (in the register cache). If |
| 1389 | they're not, then either GDB has been built incorrectly, or |
| 1390 | there's some other kind of internal error. To be really safe, |
| 1391 | we should check all of the sizes. */ |
| 1392 | gdb_assert (sizeof (*iar) == register_size (gdbarch, |
| 1393 | gdbarch_pc_regnum (gdbarch))); |
| 1394 | |
| 1395 | if (regcache_valid_p (regcache, gdbarch_pc_regnum (gdbarch))) |
| 1396 | regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), iar); |
| 1397 | if (regcache_valid_p (regcache, tdep->ppc_ps_regnum)) |
| 1398 | regcache_raw_collect (regcache, tdep->ppc_ps_regnum, msr); |
| 1399 | if (regcache_valid_p (regcache, tdep->ppc_cr_regnum)) |
| 1400 | regcache_raw_collect (regcache, tdep->ppc_cr_regnum, cr); |
| 1401 | if (regcache_valid_p (regcache, tdep->ppc_lr_regnum)) |
| 1402 | regcache_raw_collect (regcache, tdep->ppc_lr_regnum, lr); |
| 1403 | if (regcache_valid_p (regcache, tdep->ppc_ctr_regnum)) |
| 1404 | regcache_raw_collect (regcache, tdep->ppc_ctr_regnum, ctr); |
| 1405 | if (regcache_valid_p (regcache, tdep->ppc_xer_regnum)) |
| 1406 | regcache_raw_collect (regcache, tdep->ppc_xer_regnum, xer); |
| 1407 | if (tdep->ppc_fpscr_regnum >= 0 |
| 1408 | && regcache_valid_p (regcache, tdep->ppc_fpscr_regnum)) |
| 1409 | regcache_raw_collect (regcache, tdep->ppc_fpscr_regnum, fpscr); |
| 1410 | } |
| 1411 | |
| 1412 | /* Store all registers into pthread PDTID, which doesn't have a kernel |
| 1413 | thread. |
| 1414 | |
| 1415 | It's possible to store a single register into a non-kernel pthread, |
| 1416 | but I doubt it's worth the effort. */ |
| 1417 | |
| 1418 | static void |
| 1419 | store_regs_user_thread (const struct regcache *regcache, pthdb_pthread_t pdtid) |
| 1420 | { |
| 1421 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1422 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1423 | int status, i; |
| 1424 | pthdb_context_t ctx; |
| 1425 | uint32_t int32; |
| 1426 | uint64_t int64; |
| 1427 | double dbl; |
| 1428 | |
| 1429 | if (debug_aix_thread) |
| 1430 | fprintf_unfiltered (gdb_stdlog, |
| 1431 | "store_regs_user_thread %lx\n", (long) pdtid); |
| 1432 | |
| 1433 | /* Retrieve the thread's current context for its non-register |
| 1434 | values. */ |
| 1435 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
| 1436 | if (status != PTHDB_SUCCESS) |
| 1437 | error (_("aix-thread: store_registers: pthdb_pthread_context returned %s"), |
| 1438 | pd_status2str (status)); |
| 1439 | |
| 1440 | /* Collect general-purpose register values from the regcache. */ |
| 1441 | |
| 1442 | for (i = 0; i < ppc_num_gprs; i++) |
| 1443 | if (regcache_valid_p (regcache, tdep->ppc_gp0_regnum + i)) |
| 1444 | { |
| 1445 | if (arch64) |
| 1446 | { |
| 1447 | regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + i, |
| 1448 | (void *) &int64); |
| 1449 | ctx.gpr[i] = int64; |
| 1450 | } |
| 1451 | else |
| 1452 | { |
| 1453 | regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + i, |
| 1454 | (void *) &int32); |
| 1455 | ctx.gpr[i] = int32; |
| 1456 | } |
| 1457 | } |
| 1458 | |
| 1459 | /* Collect floating-point register values from the regcache. */ |
| 1460 | if (ppc_floating_point_unit_p (gdbarch)) |
| 1461 | fill_fprs (regcache, ctx.fpr); |
| 1462 | |
| 1463 | /* Special registers (always kept in ctx as 64 bits). */ |
| 1464 | if (arch64) |
| 1465 | { |
| 1466 | fill_sprs64 (regcache, &ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr, |
| 1467 | &ctx.xer, &ctx.fpscr); |
| 1468 | } |
| 1469 | else |
| 1470 | { |
| 1471 | /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32. |
| 1472 | Solution: use 32-bit temp variables. */ |
| 1473 | uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, |
| 1474 | tmp_fpscr; |
| 1475 | |
| 1476 | fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr, |
| 1477 | &tmp_xer, &tmp_fpscr); |
| 1478 | if (regcache_valid_p (regcache, gdbarch_pc_regnum (gdbarch))) |
| 1479 | ctx.iar = tmp_iar; |
| 1480 | if (regcache_valid_p (regcache, tdep->ppc_ps_regnum)) |
| 1481 | ctx.msr = tmp_msr; |
| 1482 | if (regcache_valid_p (regcache, tdep->ppc_cr_regnum)) |
| 1483 | ctx.cr = tmp_cr; |
| 1484 | if (regcache_valid_p (regcache, tdep->ppc_lr_regnum)) |
| 1485 | ctx.lr = tmp_lr; |
| 1486 | if (regcache_valid_p (regcache, tdep->ppc_ctr_regnum)) |
| 1487 | ctx.ctr = tmp_ctr; |
| 1488 | if (regcache_valid_p (regcache, tdep->ppc_xer_regnum)) |
| 1489 | ctx.xer = tmp_xer; |
| 1490 | if (regcache_valid_p (regcache, tdep->ppc_xer_regnum)) |
| 1491 | ctx.fpscr = tmp_fpscr; |
| 1492 | } |
| 1493 | |
| 1494 | status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx); |
| 1495 | if (status != PTHDB_SUCCESS) |
| 1496 | error (_("aix-thread: store_registers: pthdb_pthread_setcontext returned %s"), |
| 1497 | pd_status2str (status)); |
| 1498 | } |
| 1499 | |
| 1500 | /* Store register REGNO if != -1 or all registers otherwise into |
| 1501 | kernel thread TID. |
| 1502 | |
| 1503 | AIX provides a way to set all of a kernel thread's GPRs, FPRs, or |
| 1504 | SPRs, but there's no way to set individual registers within those |
| 1505 | groups. Therefore, if REGNO != -1, this function stores an entire |
| 1506 | group. */ |
| 1507 | |
| 1508 | static void |
| 1509 | store_regs_kernel_thread (const struct regcache *regcache, int regno, |
| 1510 | pthdb_tid_t tid) |
| 1511 | { |
| 1512 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1513 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1514 | uint64_t gprs64[ppc_num_gprs]; |
| 1515 | uint32_t gprs32[ppc_num_gprs]; |
| 1516 | double fprs[ppc_num_fprs]; |
| 1517 | struct ptxsprs sprs64; |
| 1518 | struct ptsprs sprs32; |
| 1519 | int i; |
| 1520 | |
| 1521 | if (debug_aix_thread) |
| 1522 | fprintf_unfiltered (gdb_stdlog, |
| 1523 | "store_regs_kernel_thread tid=%lx regno=%d\n", |
| 1524 | (long) tid, regno); |
| 1525 | |
| 1526 | /* General-purpose registers. */ |
| 1527 | if (regno == -1 |
| 1528 | || (tdep->ppc_gp0_regnum <= regno |
| 1529 | && regno < tdep->ppc_gp0_regnum + ppc_num_fprs)) |
| 1530 | { |
| 1531 | if (arch64) |
| 1532 | { |
| 1533 | /* Pre-fetch: some regs may not be in the cache. */ |
| 1534 | ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL); |
| 1535 | fill_gprs64 (regcache, gprs64); |
| 1536 | ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL); |
| 1537 | } |
| 1538 | else |
| 1539 | { |
| 1540 | /* Pre-fetch: some regs may not be in the cache. */ |
| 1541 | ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL); |
| 1542 | fill_gprs32 (regcache, gprs32); |
| 1543 | ptrace32 (PTT_WRITE_GPRS, tid, gprs32, 0, NULL); |
| 1544 | } |
| 1545 | } |
| 1546 | |
| 1547 | /* Floating-point registers. */ |
| 1548 | |
| 1549 | if (ppc_floating_point_unit_p (gdbarch) |
| 1550 | && (regno == -1 |
| 1551 | || (regno >= tdep->ppc_fp0_regnum |
| 1552 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) |
| 1553 | { |
| 1554 | /* Pre-fetch: some regs may not be in the cache. */ |
| 1555 | ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL); |
| 1556 | fill_fprs (regcache, fprs); |
| 1557 | ptrace32 (PTT_WRITE_FPRS, tid, (void *) fprs, 0, NULL); |
| 1558 | } |
| 1559 | |
| 1560 | /* Special-purpose registers. */ |
| 1561 | |
| 1562 | if (regno == -1 || special_register_p (gdbarch, regno)) |
| 1563 | { |
| 1564 | if (arch64) |
| 1565 | { |
| 1566 | /* Pre-fetch: some registers won't be in the cache. */ |
| 1567 | ptrace64aix (PTT_READ_SPRS, tid, |
| 1568 | (unsigned long) &sprs64, 0, NULL); |
| 1569 | fill_sprs64 (regcache, &sprs64.pt_iar, &sprs64.pt_msr, |
| 1570 | &sprs64.pt_cr, &sprs64.pt_lr, &sprs64.pt_ctr, |
| 1571 | &sprs64.pt_xer, &sprs64.pt_fpscr); |
| 1572 | ptrace64aix (PTT_WRITE_SPRS, tid, |
| 1573 | (unsigned long) &sprs64, 0, NULL); |
| 1574 | } |
| 1575 | else |
| 1576 | { |
| 1577 | /* The contents of "struct ptspr" were declared as "unsigned |
| 1578 | long" up to AIX 5.2, but are "unsigned int" since 5.3. |
| 1579 | Use temporaries to work around this problem. Also, add an |
| 1580 | assert here to make sure we fail if the system header files |
| 1581 | use "unsigned long", and the size of that type is not what |
| 1582 | the headers expect. */ |
| 1583 | uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, |
| 1584 | tmp_fpscr; |
| 1585 | |
| 1586 | gdb_assert (sizeof (sprs32.pt_iar) == 4); |
| 1587 | |
| 1588 | /* Pre-fetch: some registers won't be in the cache. */ |
| 1589 | ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL); |
| 1590 | |
| 1591 | fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, |
| 1592 | &tmp_ctr, &tmp_xer, &tmp_fpscr); |
| 1593 | |
| 1594 | sprs32.pt_iar = tmp_iar; |
| 1595 | sprs32.pt_msr = tmp_msr; |
| 1596 | sprs32.pt_cr = tmp_cr; |
| 1597 | sprs32.pt_lr = tmp_lr; |
| 1598 | sprs32.pt_ctr = tmp_ctr; |
| 1599 | sprs32.pt_xer = tmp_xer; |
| 1600 | sprs32.pt_fpscr = tmp_fpscr; |
| 1601 | |
| 1602 | if (tdep->ppc_mq_regnum >= 0) |
| 1603 | if (regcache_valid_p (regcache, tdep->ppc_mq_regnum)) |
| 1604 | regcache_raw_collect (regcache, tdep->ppc_mq_regnum, |
| 1605 | &sprs32.pt_mq); |
| 1606 | |
| 1607 | ptrace32 (PTT_WRITE_SPRS, tid, (int *) &sprs32, 0, NULL); |
| 1608 | } |
| 1609 | } |
| 1610 | } |
| 1611 | |
| 1612 | /* Store gdb's current view of the register set into the |
| 1613 | thread/process specified by inferior_ptid. */ |
| 1614 | |
| 1615 | static void |
| 1616 | aix_thread_store_registers (struct regcache *regcache, int regno) |
| 1617 | { |
| 1618 | struct thread_info *thread; |
| 1619 | pthdb_tid_t tid; |
| 1620 | |
| 1621 | if (!PD_TID (inferior_ptid)) |
| 1622 | base_target.to_store_registers (regcache, regno); |
| 1623 | else |
| 1624 | { |
| 1625 | thread = find_thread_pid (inferior_ptid); |
| 1626 | tid = thread->private->tid; |
| 1627 | |
| 1628 | if (tid == PTHDB_INVALID_TID) |
| 1629 | store_regs_user_thread (regcache, thread->private->pdtid); |
| 1630 | else |
| 1631 | store_regs_kernel_thread (regcache, regno, tid); |
| 1632 | } |
| 1633 | } |
| 1634 | |
| 1635 | /* Attempt a transfer all LEN bytes starting at OFFSET between the |
| 1636 | inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer. |
| 1637 | Return the number of bytes actually transferred. */ |
| 1638 | |
| 1639 | static LONGEST |
| 1640 | aix_thread_xfer_partial (struct target_ops *ops, enum target_object object, |
| 1641 | const char *annex, gdb_byte *readbuf, |
| 1642 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) |
| 1643 | { |
| 1644 | struct cleanup *old_chain = save_inferior_ptid (); |
| 1645 | LONGEST xfer; |
| 1646 | |
| 1647 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); |
| 1648 | xfer = base_target.to_xfer_partial (ops, object, annex, |
| 1649 | readbuf, writebuf, offset, len); |
| 1650 | |
| 1651 | do_cleanups (old_chain); |
| 1652 | return xfer; |
| 1653 | } |
| 1654 | |
| 1655 | /* Kill and forget about the inferior process. */ |
| 1656 | |
| 1657 | static void |
| 1658 | aix_thread_kill (void) |
| 1659 | { |
| 1660 | struct cleanup *cleanup = save_inferior_ptid (); |
| 1661 | |
| 1662 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); |
| 1663 | base_target.to_kill (); |
| 1664 | do_cleanups (cleanup); |
| 1665 | } |
| 1666 | |
| 1667 | /* Clean up after the inferior exits. */ |
| 1668 | |
| 1669 | static void |
| 1670 | aix_thread_mourn_inferior (struct target_ops *ops) |
| 1671 | { |
| 1672 | pd_deactivate (); |
| 1673 | base_target.to_mourn_inferior (&base_target); |
| 1674 | } |
| 1675 | |
| 1676 | /* Return whether thread PID is still valid. */ |
| 1677 | |
| 1678 | static int |
| 1679 | aix_thread_thread_alive (ptid_t ptid) |
| 1680 | { |
| 1681 | if (!PD_TID (ptid)) |
| 1682 | return base_target.to_thread_alive (ptid); |
| 1683 | |
| 1684 | /* We update the thread list every time the child stops, so all |
| 1685 | valid threads should be in the thread list. */ |
| 1686 | return in_thread_list (ptid); |
| 1687 | } |
| 1688 | |
| 1689 | /* Return a printable representation of composite PID for use in |
| 1690 | "info threads" output. */ |
| 1691 | |
| 1692 | static char * |
| 1693 | aix_thread_pid_to_str (ptid_t ptid) |
| 1694 | { |
| 1695 | static char *ret = NULL; |
| 1696 | |
| 1697 | if (!PD_TID (ptid)) |
| 1698 | return base_target.to_pid_to_str (ptid); |
| 1699 | |
| 1700 | /* Free previous return value; a new one will be allocated by |
| 1701 | xstrprintf(). */ |
| 1702 | xfree (ret); |
| 1703 | |
| 1704 | ret = xstrprintf (_("Thread %ld"), ptid_get_tid (ptid)); |
| 1705 | return ret; |
| 1706 | } |
| 1707 | |
| 1708 | /* Return a printable representation of extra information about |
| 1709 | THREAD, for use in "info threads" output. */ |
| 1710 | |
| 1711 | static char * |
| 1712 | aix_thread_extra_thread_info (struct thread_info *thread) |
| 1713 | { |
| 1714 | struct ui_file *buf; |
| 1715 | int status; |
| 1716 | pthdb_pthread_t pdtid; |
| 1717 | pthdb_tid_t tid; |
| 1718 | pthdb_state_t state; |
| 1719 | pthdb_suspendstate_t suspendstate; |
| 1720 | pthdb_detachstate_t detachstate; |
| 1721 | int cancelpend; |
| 1722 | long length; |
| 1723 | static char *ret = NULL; |
| 1724 | |
| 1725 | if (!PD_TID (thread->ptid)) |
| 1726 | return NULL; |
| 1727 | |
| 1728 | buf = mem_fileopen (); |
| 1729 | |
| 1730 | pdtid = thread->private->pdtid; |
| 1731 | tid = thread->private->tid; |
| 1732 | |
| 1733 | if (tid != PTHDB_INVALID_TID) |
| 1734 | /* i18n: Like "thread-identifier %d, [state] running, suspended" */ |
| 1735 | fprintf_unfiltered (buf, _("tid %d"), (int)tid); |
| 1736 | |
| 1737 | status = pthdb_pthread_state (pd_session, pdtid, &state); |
| 1738 | if (status != PTHDB_SUCCESS) |
| 1739 | state = PST_NOTSUP; |
| 1740 | fprintf_unfiltered (buf, ", %s", state2str (state)); |
| 1741 | |
| 1742 | status = pthdb_pthread_suspendstate (pd_session, pdtid, |
| 1743 | &suspendstate); |
| 1744 | if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED) |
| 1745 | /* i18n: Like "Thread-Id %d, [state] running, suspended" */ |
| 1746 | fprintf_unfiltered (buf, _(", suspended")); |
| 1747 | |
| 1748 | status = pthdb_pthread_detachstate (pd_session, pdtid, |
| 1749 | &detachstate); |
| 1750 | if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED) |
| 1751 | /* i18n: Like "Thread-Id %d, [state] running, detached" */ |
| 1752 | fprintf_unfiltered (buf, _(", detached")); |
| 1753 | |
| 1754 | pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend); |
| 1755 | if (status == PTHDB_SUCCESS && cancelpend) |
| 1756 | /* i18n: Like "Thread-Id %d, [state] running, cancel pending" */ |
| 1757 | fprintf_unfiltered (buf, _(", cancel pending")); |
| 1758 | |
| 1759 | ui_file_write (buf, "", 1); |
| 1760 | |
| 1761 | xfree (ret); /* Free old buffer. */ |
| 1762 | |
| 1763 | ret = ui_file_xstrdup (buf, &length); |
| 1764 | ui_file_delete (buf); |
| 1765 | |
| 1766 | return ret; |
| 1767 | } |
| 1768 | |
| 1769 | /* Initialize target aix_thread_ops. */ |
| 1770 | |
| 1771 | static void |
| 1772 | init_aix_thread_ops (void) |
| 1773 | { |
| 1774 | aix_thread_ops.to_shortname = "aix-threads"; |
| 1775 | aix_thread_ops.to_longname = _("AIX pthread support"); |
| 1776 | aix_thread_ops.to_doc = _("AIX pthread support"); |
| 1777 | |
| 1778 | aix_thread_ops.to_attach = aix_thread_attach; |
| 1779 | aix_thread_ops.to_detach = aix_thread_detach; |
| 1780 | aix_thread_ops.to_resume = aix_thread_resume; |
| 1781 | aix_thread_ops.to_wait = aix_thread_wait; |
| 1782 | aix_thread_ops.to_fetch_registers = aix_thread_fetch_registers; |
| 1783 | aix_thread_ops.to_store_registers = aix_thread_store_registers; |
| 1784 | aix_thread_ops.to_xfer_partial = aix_thread_xfer_partial; |
| 1785 | /* No need for aix_thread_ops.to_create_inferior, because we activate thread |
| 1786 | debugging when the inferior reaches pd_brk_addr. */ |
| 1787 | aix_thread_ops.to_kill = aix_thread_kill; |
| 1788 | aix_thread_ops.to_mourn_inferior = aix_thread_mourn_inferior; |
| 1789 | aix_thread_ops.to_thread_alive = aix_thread_thread_alive; |
| 1790 | aix_thread_ops.to_pid_to_str = aix_thread_pid_to_str; |
| 1791 | aix_thread_ops.to_extra_thread_info = aix_thread_extra_thread_info; |
| 1792 | aix_thread_ops.to_stratum = thread_stratum; |
| 1793 | aix_thread_ops.to_magic = OPS_MAGIC; |
| 1794 | } |
| 1795 | |
| 1796 | /* Module startup initialization function, automagically called by |
| 1797 | init.c. */ |
| 1798 | |
| 1799 | void |
| 1800 | _initialize_aix_thread (void) |
| 1801 | { |
| 1802 | init_aix_thread_ops (); |
| 1803 | add_target (&aix_thread_ops); |
| 1804 | |
| 1805 | /* Notice when object files get loaded and unloaded. */ |
| 1806 | observer_attach_new_objfile (new_objfile); |
| 1807 | |
| 1808 | add_setshow_boolean_cmd ("aix-thread", class_maintenance, &debug_aix_thread, |
| 1809 | _("Set debugging of AIX thread module."), |
| 1810 | _("Show debugging of AIX thread module."), |
| 1811 | _("Enables debugging output (used to debug GDB)."), |
| 1812 | NULL, NULL, /* FIXME: i18n: Debugging of AIX thread module is \"%d\". */ |
| 1813 | &setdebuglist, &showdebuglist); |
| 1814 | } |