| 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
| 2 | |
| 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007, 2008, 2009 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | Written by Michael Snyder at Cygnus Solutions. |
| 7 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. |
| 8 | |
| 9 | This file is part of GDB. |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License as published by |
| 13 | the Free Software Foundation; either version 3 of the License, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | This program is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License |
| 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 23 | |
| 24 | #include "defs.h" |
| 25 | #include "inferior.h" |
| 26 | #include "target.h" |
| 27 | #include "gdbcore.h" |
| 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
| 29 | #include "gdbcmd.h" |
| 30 | #include "gdbthread.h" |
| 31 | #include "regcache.h" |
| 32 | #include "inf-child.h" |
| 33 | |
| 34 | #if defined (NEW_PROC_API) |
| 35 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
| 36 | #endif |
| 37 | |
| 38 | #include <sys/procfs.h> |
| 39 | #ifdef HAVE_SYS_FAULT_H |
| 40 | #include <sys/fault.h> |
| 41 | #endif |
| 42 | #ifdef HAVE_SYS_SYSCALL_H |
| 43 | #include <sys/syscall.h> |
| 44 | #endif |
| 45 | #include <sys/errno.h> |
| 46 | #include "gdb_wait.h" |
| 47 | #include <signal.h> |
| 48 | #include <ctype.h> |
| 49 | #include "gdb_string.h" |
| 50 | #include "gdb_assert.h" |
| 51 | #include "inflow.h" |
| 52 | #include "auxv.h" |
| 53 | |
| 54 | /* |
| 55 | * PROCFS.C |
| 56 | * |
| 57 | * This module provides the interface between GDB and the |
| 58 | * /proc file system, which is used on many versions of Unix |
| 59 | * as a means for debuggers to control other processes. |
| 60 | * Examples of the systems that use this interface are: |
| 61 | * Irix |
| 62 | * Solaris |
| 63 | * OSF |
| 64 | * Unixware |
| 65 | * AIX5 |
| 66 | * |
| 67 | * /proc works by imitating a file system: you open a simulated file |
| 68 | * that represents the process you wish to interact with, and |
| 69 | * perform operations on that "file" in order to examine or change |
| 70 | * the state of the other process. |
| 71 | * |
| 72 | * The most important thing to know about /proc and this module |
| 73 | * is that there are two very different interfaces to /proc: |
| 74 | * One that uses the ioctl system call, and |
| 75 | * another that uses read and write system calls. |
| 76 | * This module has to support both /proc interfaces. This means |
| 77 | * that there are two different ways of doing every basic operation. |
| 78 | * |
| 79 | * In order to keep most of the code simple and clean, I have |
| 80 | * defined an interface "layer" which hides all these system calls. |
| 81 | * An ifdef (NEW_PROC_API) determines which interface we are using, |
| 82 | * and most or all occurrances of this ifdef should be confined to |
| 83 | * this interface layer. |
| 84 | */ |
| 85 | |
| 86 | |
| 87 | /* Determine which /proc API we are using: |
| 88 | The ioctl API defines PIOCSTATUS, while |
| 89 | the read/write (multiple fd) API never does. */ |
| 90 | |
| 91 | #ifdef NEW_PROC_API |
| 92 | #include <sys/types.h> |
| 93 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
| 94 | #endif |
| 95 | |
| 96 | #include <fcntl.h> /* for O_RDONLY */ |
| 97 | #include <unistd.h> /* for "X_OK" */ |
| 98 | #include "gdb_stat.h" /* for struct stat */ |
| 99 | |
| 100 | /* Note: procfs-utils.h must be included after the above system header |
| 101 | files, because it redefines various system calls using macros. |
| 102 | This may be incompatible with the prototype declarations. */ |
| 103 | |
| 104 | #include "proc-utils.h" |
| 105 | |
| 106 | /* Prototypes for supply_gregset etc. */ |
| 107 | #include "gregset.h" |
| 108 | |
| 109 | /* =================== TARGET_OPS "MODULE" =================== */ |
| 110 | |
| 111 | /* |
| 112 | * This module defines the GDB target vector and its methods. |
| 113 | */ |
| 114 | |
| 115 | static void procfs_attach (struct target_ops *, char *, int); |
| 116 | static void procfs_detach (struct target_ops *, char *, int); |
| 117 | static void procfs_resume (struct target_ops *, |
| 118 | ptid_t, int, enum target_signal); |
| 119 | static void procfs_stop (ptid_t); |
| 120 | static void procfs_files_info (struct target_ops *); |
| 121 | static void procfs_fetch_registers (struct target_ops *, |
| 122 | struct regcache *, int); |
| 123 | static void procfs_store_registers (struct target_ops *, |
| 124 | struct regcache *, int); |
| 125 | static void procfs_notice_signals (ptid_t); |
| 126 | static void procfs_kill_inferior (void); |
| 127 | static void procfs_mourn_inferior (struct target_ops *ops); |
| 128 | static void procfs_create_inferior (struct target_ops *, char *, |
| 129 | char *, char **, int); |
| 130 | static ptid_t procfs_wait (struct target_ops *, |
| 131 | ptid_t, struct target_waitstatus *); |
| 132 | static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
| 133 | struct mem_attrib *attrib, |
| 134 | struct target_ops *); |
| 135 | static LONGEST procfs_xfer_partial (struct target_ops *ops, |
| 136 | enum target_object object, |
| 137 | const char *annex, |
| 138 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 139 | ULONGEST offset, LONGEST len); |
| 140 | |
| 141 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
| 142 | |
| 143 | void procfs_find_new_threads (struct target_ops *ops); |
| 144 | char *procfs_pid_to_str (struct target_ops *, ptid_t); |
| 145 | |
| 146 | static int proc_find_memory_regions (int (*) (CORE_ADDR, |
| 147 | unsigned long, |
| 148 | int, int, int, |
| 149 | void *), |
| 150 | void *); |
| 151 | |
| 152 | static char * procfs_make_note_section (bfd *, int *); |
| 153 | |
| 154 | static int procfs_can_use_hw_breakpoint (int, int, int); |
| 155 | |
| 156 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
| 157 | /* When GDB is built as 64-bit application on Solaris, the auxv data is |
| 158 | presented in 64-bit format. We need to provide a custom parser to handle |
| 159 | that. */ |
| 160 | static int |
| 161 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, |
| 162 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
| 163 | { |
| 164 | gdb_byte *ptr = *readptr; |
| 165 | |
| 166 | if (endptr == ptr) |
| 167 | return 0; |
| 168 | |
| 169 | if (endptr - ptr < 8 * 2) |
| 170 | return -1; |
| 171 | |
| 172 | *typep = extract_unsigned_integer (ptr, 4); |
| 173 | ptr += 8; |
| 174 | /* The size of data is always 64-bit. If the application is 32-bit, |
| 175 | it will be zero extended, as expected. */ |
| 176 | *valp = extract_unsigned_integer (ptr, 8); |
| 177 | ptr += 8; |
| 178 | |
| 179 | *readptr = ptr; |
| 180 | return 1; |
| 181 | } |
| 182 | #endif |
| 183 | |
| 184 | static struct target_ops * |
| 185 | procfs_target (void) |
| 186 | { |
| 187 | struct target_ops *t = inf_child_target (); |
| 188 | |
| 189 | t->to_shortname = "procfs"; |
| 190 | t->to_longname = "Unix /proc child process"; |
| 191 | t->to_doc = |
| 192 | "Unix /proc child process (started by the \"run\" command)."; |
| 193 | t->to_create_inferior = procfs_create_inferior; |
| 194 | t->to_kill = procfs_kill_inferior; |
| 195 | t->to_mourn_inferior = procfs_mourn_inferior; |
| 196 | t->to_attach = procfs_attach; |
| 197 | t->to_detach = procfs_detach; |
| 198 | t->to_wait = procfs_wait; |
| 199 | t->to_resume = procfs_resume; |
| 200 | t->to_fetch_registers = procfs_fetch_registers; |
| 201 | t->to_store_registers = procfs_store_registers; |
| 202 | t->to_xfer_partial = procfs_xfer_partial; |
| 203 | t->deprecated_xfer_memory = procfs_xfer_memory; |
| 204 | t->to_notice_signals = procfs_notice_signals; |
| 205 | t->to_files_info = procfs_files_info; |
| 206 | t->to_stop = procfs_stop; |
| 207 | |
| 208 | t->to_find_new_threads = procfs_find_new_threads; |
| 209 | t->to_thread_alive = procfs_thread_alive; |
| 210 | t->to_pid_to_str = procfs_pid_to_str; |
| 211 | |
| 212 | t->to_has_thread_control = tc_schedlock; |
| 213 | t->to_find_memory_regions = proc_find_memory_regions; |
| 214 | t->to_make_corefile_notes = procfs_make_note_section; |
| 215 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
| 216 | |
| 217 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
| 218 | t->to_auxv_parse = procfs_auxv_parse; |
| 219 | #endif |
| 220 | |
| 221 | t->to_magic = OPS_MAGIC; |
| 222 | |
| 223 | return t; |
| 224 | } |
| 225 | |
| 226 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
| 227 | |
| 228 | /* |
| 229 | * World Unification: |
| 230 | * |
| 231 | * Put any typedefs, defines etc. here that are required for |
| 232 | * the unification of code that handles different versions of /proc. |
| 233 | */ |
| 234 | |
| 235 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ |
| 236 | #ifdef WA_READ |
| 237 | enum { READ_WATCHFLAG = WA_READ, |
| 238 | WRITE_WATCHFLAG = WA_WRITE, |
| 239 | EXEC_WATCHFLAG = WA_EXEC, |
| 240 | AFTER_WATCHFLAG = WA_TRAPAFTER |
| 241 | }; |
| 242 | #endif |
| 243 | #else /* Irix method for watchpoints */ |
| 244 | enum { READ_WATCHFLAG = MA_READ, |
| 245 | WRITE_WATCHFLAG = MA_WRITE, |
| 246 | EXEC_WATCHFLAG = MA_EXEC, |
| 247 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ |
| 248 | }; |
| 249 | #endif |
| 250 | |
| 251 | /* gdb_sigset_t */ |
| 252 | #ifdef HAVE_PR_SIGSET_T |
| 253 | typedef pr_sigset_t gdb_sigset_t; |
| 254 | #else |
| 255 | typedef sigset_t gdb_sigset_t; |
| 256 | #endif |
| 257 | |
| 258 | /* sigaction */ |
| 259 | #ifdef HAVE_PR_SIGACTION64_T |
| 260 | typedef pr_sigaction64_t gdb_sigaction_t; |
| 261 | #else |
| 262 | typedef struct sigaction gdb_sigaction_t; |
| 263 | #endif |
| 264 | |
| 265 | /* siginfo */ |
| 266 | #ifdef HAVE_PR_SIGINFO64_T |
| 267 | typedef pr_siginfo64_t gdb_siginfo_t; |
| 268 | #else |
| 269 | typedef struct siginfo gdb_siginfo_t; |
| 270 | #endif |
| 271 | |
| 272 | /* gdb_premptysysset */ |
| 273 | #ifdef premptysysset |
| 274 | #define gdb_premptysysset premptysysset |
| 275 | #else |
| 276 | #define gdb_premptysysset premptyset |
| 277 | #endif |
| 278 | |
| 279 | /* praddsysset */ |
| 280 | #ifdef praddsysset |
| 281 | #define gdb_praddsysset praddsysset |
| 282 | #else |
| 283 | #define gdb_praddsysset praddset |
| 284 | #endif |
| 285 | |
| 286 | /* prdelsysset */ |
| 287 | #ifdef prdelsysset |
| 288 | #define gdb_prdelsysset prdelsysset |
| 289 | #else |
| 290 | #define gdb_prdelsysset prdelset |
| 291 | #endif |
| 292 | |
| 293 | /* prissyssetmember */ |
| 294 | #ifdef prissyssetmember |
| 295 | #define gdb_pr_issyssetmember prissyssetmember |
| 296 | #else |
| 297 | #define gdb_pr_issyssetmember prismember |
| 298 | #endif |
| 299 | |
| 300 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't |
| 301 | as intuitively descriptive as it could be, so we'll define |
| 302 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of |
| 303 | this writing, this feature is only found on AIX5 systems and |
| 304 | basically means that the set of syscalls is not fixed. I.e, |
| 305 | there's no nice table that one can #include to get all of the |
| 306 | syscall numbers. Instead, they're stored in /proc/PID/sysent |
| 307 | for each process. We are at least guaranteed that they won't |
| 308 | change over the lifetime of the process. But each process could |
| 309 | (in theory) have different syscall numbers. |
| 310 | */ |
| 311 | #ifdef HAVE_PRSYSENT_T |
| 312 | #define DYNAMIC_SYSCALLS |
| 313 | #endif |
| 314 | |
| 315 | |
| 316 | |
| 317 | /* =================== STRUCT PROCINFO "MODULE" =================== */ |
| 318 | |
| 319 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ |
| 320 | |
| 321 | /* The procinfo struct is a wrapper to hold all the state information |
| 322 | concerning a /proc process. There should be exactly one procinfo |
| 323 | for each process, and since GDB currently can debug only one |
| 324 | process at a time, that means there should be only one procinfo. |
| 325 | All of the LWP's of a process can be accessed indirectly thru the |
| 326 | single process procinfo. |
| 327 | |
| 328 | However, against the day when GDB may debug more than one process, |
| 329 | this data structure is kept in a list (which for now will hold no |
| 330 | more than one member), and many functions will have a pointer to a |
| 331 | procinfo as an argument. |
| 332 | |
| 333 | There will be a separate procinfo structure for use by the (not yet |
| 334 | implemented) "info proc" command, so that we can print useful |
| 335 | information about any random process without interfering with the |
| 336 | inferior's procinfo information. */ |
| 337 | |
| 338 | #ifdef NEW_PROC_API |
| 339 | /* format strings for /proc paths */ |
| 340 | # ifndef CTL_PROC_NAME_FMT |
| 341 | # define MAIN_PROC_NAME_FMT "/proc/%d" |
| 342 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" |
| 343 | # define AS_PROC_NAME_FMT "/proc/%d/as" |
| 344 | # define MAP_PROC_NAME_FMT "/proc/%d/map" |
| 345 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" |
| 346 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") |
| 347 | # endif |
| 348 | /* the name of the proc status struct depends on the implementation */ |
| 349 | typedef pstatus_t gdb_prstatus_t; |
| 350 | typedef lwpstatus_t gdb_lwpstatus_t; |
| 351 | #else /* ! NEW_PROC_API */ |
| 352 | /* format strings for /proc paths */ |
| 353 | # ifndef CTL_PROC_NAME_FMT |
| 354 | # define MAIN_PROC_NAME_FMT "/proc/%05d" |
| 355 | # define CTL_PROC_NAME_FMT "/proc/%05d" |
| 356 | # define AS_PROC_NAME_FMT "/proc/%05d" |
| 357 | # define MAP_PROC_NAME_FMT "/proc/%05d" |
| 358 | # define STATUS_PROC_NAME_FMT "/proc/%05d" |
| 359 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") |
| 360 | # endif |
| 361 | /* the name of the proc status struct depends on the implementation */ |
| 362 | typedef prstatus_t gdb_prstatus_t; |
| 363 | typedef prstatus_t gdb_lwpstatus_t; |
| 364 | #endif /* NEW_PROC_API */ |
| 365 | |
| 366 | typedef struct procinfo { |
| 367 | struct procinfo *next; |
| 368 | int pid; /* Process ID */ |
| 369 | int tid; /* Thread/LWP id */ |
| 370 | |
| 371 | /* process state */ |
| 372 | int was_stopped; |
| 373 | int ignore_next_sigstop; |
| 374 | |
| 375 | /* The following four fd fields may be identical, or may contain |
| 376 | several different fd's, depending on the version of /proc |
| 377 | (old ioctl or new read/write). */ |
| 378 | |
| 379 | int ctl_fd; /* File descriptor for /proc control file */ |
| 380 | /* |
| 381 | * The next three file descriptors are actually only needed in the |
| 382 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). |
| 383 | * However, to avoid a bunch of #ifdefs in the code, we will use |
| 384 | * them uniformly by (in the case of the ioctl single-file-descriptor |
| 385 | * implementation) filling them with copies of the control fd. |
| 386 | */ |
| 387 | int status_fd; /* File descriptor for /proc status file */ |
| 388 | int as_fd; /* File descriptor for /proc as file */ |
| 389 | |
| 390 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
| 391 | |
| 392 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
| 393 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
| 394 | gdb_sigset_t saved_sighold; /* Saved held signal set */ |
| 395 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
| 396 | sysset_t *saved_entryset; /* Saved traced system call entry set */ |
| 397 | |
| 398 | gdb_prstatus_t prstatus; /* Current process status info */ |
| 399 | |
| 400 | #ifndef NEW_PROC_API |
| 401 | gdb_fpregset_t fpregset; /* Current floating point registers */ |
| 402 | #endif |
| 403 | |
| 404 | #ifdef DYNAMIC_SYSCALLS |
| 405 | int num_syscalls; /* Total number of syscalls */ |
| 406 | char **syscall_names; /* Syscall number to name map */ |
| 407 | #endif |
| 408 | |
| 409 | struct procinfo *thread_list; |
| 410 | |
| 411 | int status_valid : 1; |
| 412 | int gregs_valid : 1; |
| 413 | int fpregs_valid : 1; |
| 414 | int threads_valid: 1; |
| 415 | } procinfo; |
| 416 | |
| 417 | static char errmsg[128]; /* shared error msg buffer */ |
| 418 | |
| 419 | /* Function prototypes for procinfo module: */ |
| 420 | |
| 421 | static procinfo *find_procinfo_or_die (int pid, int tid); |
| 422 | static procinfo *find_procinfo (int pid, int tid); |
| 423 | static procinfo *create_procinfo (int pid, int tid); |
| 424 | static void destroy_procinfo (procinfo * p); |
| 425 | static void do_destroy_procinfo_cleanup (void *); |
| 426 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
| 427 | static int open_procinfo_files (procinfo * p, int which); |
| 428 | static void close_procinfo_files (procinfo * p); |
| 429 | static int sysset_t_size (procinfo *p); |
| 430 | static sysset_t *sysset_t_alloc (procinfo * pi); |
| 431 | #ifdef DYNAMIC_SYSCALLS |
| 432 | static void load_syscalls (procinfo *pi); |
| 433 | static void free_syscalls (procinfo *pi); |
| 434 | static int find_syscall (procinfo *pi, char *name); |
| 435 | #endif /* DYNAMIC_SYSCALLS */ |
| 436 | |
| 437 | /* The head of the procinfo list: */ |
| 438 | static procinfo * procinfo_list; |
| 439 | |
| 440 | /* |
| 441 | * Function: find_procinfo |
| 442 | * |
| 443 | * Search the procinfo list. |
| 444 | * |
| 445 | * Returns: pointer to procinfo, or NULL if not found. |
| 446 | */ |
| 447 | |
| 448 | static procinfo * |
| 449 | find_procinfo (int pid, int tid) |
| 450 | { |
| 451 | procinfo *pi; |
| 452 | |
| 453 | for (pi = procinfo_list; pi; pi = pi->next) |
| 454 | if (pi->pid == pid) |
| 455 | break; |
| 456 | |
| 457 | if (pi) |
| 458 | if (tid) |
| 459 | { |
| 460 | /* Don't check threads_valid. If we're updating the |
| 461 | thread_list, we want to find whatever threads are already |
| 462 | here. This means that in general it is the caller's |
| 463 | responsibility to check threads_valid and update before |
| 464 | calling find_procinfo, if the caller wants to find a new |
| 465 | thread. */ |
| 466 | |
| 467 | for (pi = pi->thread_list; pi; pi = pi->next) |
| 468 | if (pi->tid == tid) |
| 469 | break; |
| 470 | } |
| 471 | |
| 472 | return pi; |
| 473 | } |
| 474 | |
| 475 | /* |
| 476 | * Function: find_procinfo_or_die |
| 477 | * |
| 478 | * Calls find_procinfo, but errors on failure. |
| 479 | */ |
| 480 | |
| 481 | static procinfo * |
| 482 | find_procinfo_or_die (int pid, int tid) |
| 483 | { |
| 484 | procinfo *pi = find_procinfo (pid, tid); |
| 485 | |
| 486 | if (pi == NULL) |
| 487 | { |
| 488 | if (tid) |
| 489 | error (_("procfs: couldn't find pid %d (kernel thread %d) in procinfo list."), |
| 490 | pid, tid); |
| 491 | else |
| 492 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
| 493 | } |
| 494 | return pi; |
| 495 | } |
| 496 | |
| 497 | /* open_with_retry() is a wrapper for open(). The appropriate |
| 498 | open() call is attempted; if unsuccessful, it will be retried as |
| 499 | many times as needed for the EAGAIN and EINTR conditions. |
| 500 | |
| 501 | For other conditions, open_with_retry() will retry the open() a |
| 502 | limited number of times. In addition, a short sleep is imposed |
| 503 | prior to retrying the open(). The reason for this sleep is to give |
| 504 | the kernel a chance to catch up and create the file in question in |
| 505 | the event that GDB "wins" the race to open a file before the kernel |
| 506 | has created it. */ |
| 507 | |
| 508 | static int |
| 509 | open_with_retry (const char *pathname, int flags) |
| 510 | { |
| 511 | int retries_remaining, status; |
| 512 | |
| 513 | retries_remaining = 2; |
| 514 | |
| 515 | while (1) |
| 516 | { |
| 517 | status = open (pathname, flags); |
| 518 | |
| 519 | if (status >= 0 || retries_remaining == 0) |
| 520 | break; |
| 521 | else if (errno != EINTR && errno != EAGAIN) |
| 522 | { |
| 523 | retries_remaining--; |
| 524 | sleep (1); |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | return status; |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * Function: open_procinfo_files |
| 533 | * |
| 534 | * Open the file descriptor for the process or LWP. |
| 535 | * ifdef NEW_PROC_API, we only open the control file descriptor; |
| 536 | * the others are opened lazily as needed. |
| 537 | * else (if not NEW_PROC_API), there is only one real |
| 538 | * file descriptor, but we keep multiple copies of it so that |
| 539 | * the code that uses them does not have to be #ifdef'd. |
| 540 | * |
| 541 | * Return: file descriptor, or zero for failure. |
| 542 | */ |
| 543 | |
| 544 | enum { FD_CTL, FD_STATUS, FD_AS }; |
| 545 | |
| 546 | static int |
| 547 | open_procinfo_files (procinfo *pi, int which) |
| 548 | { |
| 549 | #ifdef NEW_PROC_API |
| 550 | char tmp[MAX_PROC_NAME_SIZE]; |
| 551 | #endif |
| 552 | int fd; |
| 553 | |
| 554 | /* |
| 555 | * This function is getting ALMOST long enough to break up into several. |
| 556 | * Here is some rationale: |
| 557 | * |
| 558 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): |
| 559 | * There are several file descriptors that may need to be open |
| 560 | * for any given process or LWP. The ones we're intereted in are: |
| 561 | * - control (ctl) write-only change the state |
| 562 | * - status (status) read-only query the state |
| 563 | * - address space (as) read/write access memory |
| 564 | * - map (map) read-only virtual addr map |
| 565 | * Most of these are opened lazily as they are needed. |
| 566 | * The pathnames for the 'files' for an LWP look slightly |
| 567 | * different from those of a first-class process: |
| 568 | * Pathnames for a process (<proc-id>): |
| 569 | * /proc/<proc-id>/ctl |
| 570 | * /proc/<proc-id>/status |
| 571 | * /proc/<proc-id>/as |
| 572 | * /proc/<proc-id>/map |
| 573 | * Pathnames for an LWP (lwp-id): |
| 574 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl |
| 575 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus |
| 576 | * An LWP has no map or address space file descriptor, since |
| 577 | * the memory map and address space are shared by all LWPs. |
| 578 | * |
| 579 | * Everyone else (Solaris 2.5, Irix, OSF) |
| 580 | * There is only one file descriptor for each process or LWP. |
| 581 | * For convenience, we copy the same file descriptor into all |
| 582 | * three fields of the procinfo struct (ctl_fd, status_fd, and |
| 583 | * as_fd, see NEW_PROC_API above) so that code that uses them |
| 584 | * doesn't need any #ifdef's. |
| 585 | * Pathname for all: |
| 586 | * /proc/<proc-id> |
| 587 | * |
| 588 | * Solaris 2.5 LWP's: |
| 589 | * Each LWP has an independent file descriptor, but these |
| 590 | * are not obtained via the 'open' system call like the rest: |
| 591 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) |
| 592 | * to the file descriptor of the parent process. |
| 593 | * |
| 594 | * OSF threads: |
| 595 | * These do not even have their own independent file descriptor. |
| 596 | * All operations are carried out on the file descriptor of the |
| 597 | * parent process. Therefore we just call open again for each |
| 598 | * thread, getting a new handle for the same 'file'. |
| 599 | */ |
| 600 | |
| 601 | #ifdef NEW_PROC_API |
| 602 | /* |
| 603 | * In this case, there are several different file descriptors that |
| 604 | * we might be asked to open. The control file descriptor will be |
| 605 | * opened early, but the others will be opened lazily as they are |
| 606 | * needed. |
| 607 | */ |
| 608 | |
| 609 | strcpy (tmp, pi->pathname); |
| 610 | switch (which) { /* which file descriptor to open? */ |
| 611 | case FD_CTL: |
| 612 | if (pi->tid) |
| 613 | strcat (tmp, "/lwpctl"); |
| 614 | else |
| 615 | strcat (tmp, "/ctl"); |
| 616 | fd = open_with_retry (tmp, O_WRONLY); |
| 617 | if (fd <= 0) |
| 618 | return 0; /* fail */ |
| 619 | pi->ctl_fd = fd; |
| 620 | break; |
| 621 | case FD_AS: |
| 622 | if (pi->tid) |
| 623 | return 0; /* there is no 'as' file descriptor for an lwp */ |
| 624 | strcat (tmp, "/as"); |
| 625 | fd = open_with_retry (tmp, O_RDWR); |
| 626 | if (fd <= 0) |
| 627 | return 0; /* fail */ |
| 628 | pi->as_fd = fd; |
| 629 | break; |
| 630 | case FD_STATUS: |
| 631 | if (pi->tid) |
| 632 | strcat (tmp, "/lwpstatus"); |
| 633 | else |
| 634 | strcat (tmp, "/status"); |
| 635 | fd = open_with_retry (tmp, O_RDONLY); |
| 636 | if (fd <= 0) |
| 637 | return 0; /* fail */ |
| 638 | pi->status_fd = fd; |
| 639 | break; |
| 640 | default: |
| 641 | return 0; /* unknown file descriptor */ |
| 642 | } |
| 643 | #else /* not NEW_PROC_API */ |
| 644 | /* |
| 645 | * In this case, there is only one file descriptor for each procinfo |
| 646 | * (ie. each process or LWP). In fact, only the file descriptor for |
| 647 | * the process can actually be opened by an 'open' system call. |
| 648 | * The ones for the LWPs have to be obtained thru an IOCTL call |
| 649 | * on the process's file descriptor. |
| 650 | * |
| 651 | * For convenience, we copy each procinfo's single file descriptor |
| 652 | * into all of the fields occupied by the several file descriptors |
| 653 | * of the NEW_PROC_API implementation. That way, the code that uses |
| 654 | * them can be written without ifdefs. |
| 655 | */ |
| 656 | |
| 657 | |
| 658 | #ifdef PIOCTSTATUS /* OSF */ |
| 659 | /* Only one FD; just open it. */ |
| 660 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) |
| 661 | return 0; |
| 662 | #else /* Sol 2.5, Irix, other? */ |
| 663 | if (pi->tid == 0) /* Master procinfo for the process */ |
| 664 | { |
| 665 | fd = open_with_retry (pi->pathname, O_RDWR); |
| 666 | if (fd <= 0) |
| 667 | return 0; /* fail */ |
| 668 | } |
| 669 | else /* LWP thread procinfo */ |
| 670 | { |
| 671 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ |
| 672 | procinfo *process; |
| 673 | int lwpid = pi->tid; |
| 674 | |
| 675 | /* Find the procinfo for the entire process. */ |
| 676 | if ((process = find_procinfo (pi->pid, 0)) == NULL) |
| 677 | return 0; /* fail */ |
| 678 | |
| 679 | /* Now obtain the file descriptor for the LWP. */ |
| 680 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) |
| 681 | return 0; /* fail */ |
| 682 | #else /* Irix, other? */ |
| 683 | return 0; /* Don't know how to open threads */ |
| 684 | #endif /* Sol 2.5 PIOCOPENLWP */ |
| 685 | } |
| 686 | #endif /* OSF PIOCTSTATUS */ |
| 687 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; |
| 688 | #endif /* NEW_PROC_API */ |
| 689 | |
| 690 | return 1; /* success */ |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * Function: create_procinfo |
| 695 | * |
| 696 | * Allocate a data structure and link it into the procinfo list. |
| 697 | * (First tries to find a pre-existing one (FIXME: why?) |
| 698 | * |
| 699 | * Return: pointer to new procinfo struct. |
| 700 | */ |
| 701 | |
| 702 | static procinfo * |
| 703 | create_procinfo (int pid, int tid) |
| 704 | { |
| 705 | procinfo *pi, *parent = NULL; |
| 706 | |
| 707 | if ((pi = find_procinfo (pid, tid))) |
| 708 | return pi; /* Already exists, nothing to do. */ |
| 709 | |
| 710 | /* find parent before doing malloc, to save having to cleanup */ |
| 711 | if (tid != 0) |
| 712 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I |
| 713 | create it if it |
| 714 | doesn't exist yet? */ |
| 715 | |
| 716 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
| 717 | memset (pi, 0, sizeof (procinfo)); |
| 718 | pi->pid = pid; |
| 719 | pi->tid = tid; |
| 720 | |
| 721 | #ifdef DYNAMIC_SYSCALLS |
| 722 | load_syscalls (pi); |
| 723 | #endif |
| 724 | |
| 725 | pi->saved_entryset = sysset_t_alloc (pi); |
| 726 | pi->saved_exitset = sysset_t_alloc (pi); |
| 727 | |
| 728 | /* Chain into list. */ |
| 729 | if (tid == 0) |
| 730 | { |
| 731 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); |
| 732 | pi->next = procinfo_list; |
| 733 | procinfo_list = pi; |
| 734 | } |
| 735 | else |
| 736 | { |
| 737 | #ifdef NEW_PROC_API |
| 738 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); |
| 739 | #else |
| 740 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); |
| 741 | #endif |
| 742 | pi->next = parent->thread_list; |
| 743 | parent->thread_list = pi; |
| 744 | } |
| 745 | return pi; |
| 746 | } |
| 747 | |
| 748 | /* |
| 749 | * Function: close_procinfo_files |
| 750 | * |
| 751 | * Close all file descriptors associated with the procinfo |
| 752 | */ |
| 753 | |
| 754 | static void |
| 755 | close_procinfo_files (procinfo *pi) |
| 756 | { |
| 757 | if (pi->ctl_fd > 0) |
| 758 | close (pi->ctl_fd); |
| 759 | #ifdef NEW_PROC_API |
| 760 | if (pi->as_fd > 0) |
| 761 | close (pi->as_fd); |
| 762 | if (pi->status_fd > 0) |
| 763 | close (pi->status_fd); |
| 764 | #endif |
| 765 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
| 766 | } |
| 767 | |
| 768 | /* |
| 769 | * Function: destroy_procinfo |
| 770 | * |
| 771 | * Destructor function. Close, unlink and deallocate the object. |
| 772 | */ |
| 773 | |
| 774 | static void |
| 775 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
| 776 | { |
| 777 | procinfo *ptr; |
| 778 | |
| 779 | /* Step one: unlink the procinfo from its list */ |
| 780 | if (pi == *list) |
| 781 | *list = pi->next; |
| 782 | else |
| 783 | for (ptr = *list; ptr; ptr = ptr->next) |
| 784 | if (ptr->next == pi) |
| 785 | { |
| 786 | ptr->next = pi->next; |
| 787 | break; |
| 788 | } |
| 789 | |
| 790 | /* Step two: close any open file descriptors */ |
| 791 | close_procinfo_files (pi); |
| 792 | |
| 793 | /* Step three: free the memory. */ |
| 794 | #ifdef DYNAMIC_SYSCALLS |
| 795 | free_syscalls (pi); |
| 796 | #endif |
| 797 | xfree (pi->saved_entryset); |
| 798 | xfree (pi->saved_exitset); |
| 799 | xfree (pi); |
| 800 | } |
| 801 | |
| 802 | static void |
| 803 | destroy_procinfo (procinfo *pi) |
| 804 | { |
| 805 | procinfo *tmp; |
| 806 | |
| 807 | if (pi->tid != 0) /* destroy a thread procinfo */ |
| 808 | { |
| 809 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ |
| 810 | destroy_one_procinfo (&tmp->thread_list, pi); |
| 811 | } |
| 812 | else /* destroy a process procinfo and all its threads */ |
| 813 | { |
| 814 | /* First destroy the children, if any; */ |
| 815 | while (pi->thread_list != NULL) |
| 816 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); |
| 817 | /* Then destroy the parent. Genocide!!! */ |
| 818 | destroy_one_procinfo (&procinfo_list, pi); |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | static void |
| 823 | do_destroy_procinfo_cleanup (void *pi) |
| 824 | { |
| 825 | destroy_procinfo (pi); |
| 826 | } |
| 827 | |
| 828 | enum { NOKILL, KILL }; |
| 829 | |
| 830 | /* |
| 831 | * Function: dead_procinfo |
| 832 | * |
| 833 | * To be called on a non_recoverable error for a procinfo. |
| 834 | * Prints error messages, optionally sends a SIGKILL to the process, |
| 835 | * then destroys the data structure. |
| 836 | */ |
| 837 | |
| 838 | static void |
| 839 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
| 840 | { |
| 841 | char procfile[80]; |
| 842 | |
| 843 | if (pi->pathname) |
| 844 | { |
| 845 | print_sys_errmsg (pi->pathname, errno); |
| 846 | } |
| 847 | else |
| 848 | { |
| 849 | sprintf (procfile, "process %d", pi->pid); |
| 850 | print_sys_errmsg (procfile, errno); |
| 851 | } |
| 852 | if (kill_p == KILL) |
| 853 | kill (pi->pid, SIGKILL); |
| 854 | |
| 855 | destroy_procinfo (pi); |
| 856 | error ("%s", msg); |
| 857 | } |
| 858 | |
| 859 | /* |
| 860 | * Function: sysset_t_size |
| 861 | * |
| 862 | * Returns the (complete) size of a sysset_t struct. Normally, this |
| 863 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual |
| 864 | * size of sysset_t isn't known until runtime. |
| 865 | */ |
| 866 | |
| 867 | static int |
| 868 | sysset_t_size (procinfo * pi) |
| 869 | { |
| 870 | #ifndef DYNAMIC_SYSCALLS |
| 871 | return sizeof (sysset_t); |
| 872 | #else |
| 873 | return sizeof (sysset_t) - sizeof (uint64_t) |
| 874 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
| 875 | / (8 * sizeof (uint64_t))); |
| 876 | #endif |
| 877 | } |
| 878 | |
| 879 | /* Function: sysset_t_alloc |
| 880 | |
| 881 | Allocate and (partially) initialize a sysset_t struct. */ |
| 882 | |
| 883 | static sysset_t * |
| 884 | sysset_t_alloc (procinfo * pi) |
| 885 | { |
| 886 | sysset_t *ret; |
| 887 | int size = sysset_t_size (pi); |
| 888 | ret = xmalloc (size); |
| 889 | #ifdef DYNAMIC_SYSCALLS |
| 890 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
| 891 | / (8 * sizeof (uint64_t)); |
| 892 | #endif |
| 893 | return ret; |
| 894 | } |
| 895 | |
| 896 | #ifdef DYNAMIC_SYSCALLS |
| 897 | |
| 898 | /* Function: load_syscalls |
| 899 | |
| 900 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
| 901 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
| 902 | with the names. (Certain numbers may be skipped in which case the |
| 903 | names for these numbers will be left as NULL.) */ |
| 904 | |
| 905 | #define MAX_SYSCALL_NAME_LENGTH 256 |
| 906 | #define MAX_SYSCALLS 65536 |
| 907 | |
| 908 | static void |
| 909 | load_syscalls (procinfo *pi) |
| 910 | { |
| 911 | char pathname[MAX_PROC_NAME_SIZE]; |
| 912 | int sysent_fd; |
| 913 | prsysent_t header; |
| 914 | prsyscall_t *syscalls; |
| 915 | int i, size, maxcall; |
| 916 | |
| 917 | pi->num_syscalls = 0; |
| 918 | pi->syscall_names = 0; |
| 919 | |
| 920 | /* Open the file descriptor for the sysent file */ |
| 921 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
| 922 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
| 923 | if (sysent_fd < 0) |
| 924 | { |
| 925 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
| 926 | } |
| 927 | |
| 928 | size = sizeof header - sizeof (prsyscall_t); |
| 929 | if (read (sysent_fd, &header, size) != size) |
| 930 | { |
| 931 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
| 932 | } |
| 933 | |
| 934 | if (header.pr_nsyscalls == 0) |
| 935 | { |
| 936 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); |
| 937 | } |
| 938 | |
| 939 | size = header.pr_nsyscalls * sizeof (prsyscall_t); |
| 940 | syscalls = xmalloc (size); |
| 941 | |
| 942 | if (read (sysent_fd, syscalls, size) != size) |
| 943 | { |
| 944 | xfree (syscalls); |
| 945 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
| 946 | } |
| 947 | |
| 948 | /* Find maximum syscall number. This may not be the same as |
| 949 | pr_nsyscalls since that value refers to the number of entries |
| 950 | in the table. (Also, the docs indicate that some system |
| 951 | call numbers may be skipped.) */ |
| 952 | |
| 953 | maxcall = syscalls[0].pr_number; |
| 954 | |
| 955 | for (i = 1; i < header.pr_nsyscalls; i++) |
| 956 | if (syscalls[i].pr_number > maxcall |
| 957 | && syscalls[i].pr_nameoff > 0 |
| 958 | && syscalls[i].pr_number < MAX_SYSCALLS) |
| 959 | maxcall = syscalls[i].pr_number; |
| 960 | |
| 961 | pi->num_syscalls = maxcall+1; |
| 962 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); |
| 963 | |
| 964 | for (i = 0; i < pi->num_syscalls; i++) |
| 965 | pi->syscall_names[i] = NULL; |
| 966 | |
| 967 | /* Read the syscall names in */ |
| 968 | for (i = 0; i < header.pr_nsyscalls; i++) |
| 969 | { |
| 970 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; |
| 971 | int nread; |
| 972 | int callnum; |
| 973 | |
| 974 | if (syscalls[i].pr_number >= MAX_SYSCALLS |
| 975 | || syscalls[i].pr_number < 0 |
| 976 | || syscalls[i].pr_nameoff <= 0 |
| 977 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) |
| 978 | != (off_t) syscalls[i].pr_nameoff)) |
| 979 | continue; |
| 980 | |
| 981 | nread = read (sysent_fd, namebuf, sizeof namebuf); |
| 982 | if (nread <= 0) |
| 983 | continue; |
| 984 | |
| 985 | callnum = syscalls[i].pr_number; |
| 986 | |
| 987 | if (pi->syscall_names[callnum] != NULL) |
| 988 | { |
| 989 | /* FIXME: Generate warning */ |
| 990 | continue; |
| 991 | } |
| 992 | |
| 993 | namebuf[nread-1] = '\0'; |
| 994 | size = strlen (namebuf) + 1; |
| 995 | pi->syscall_names[callnum] = xmalloc (size); |
| 996 | strncpy (pi->syscall_names[callnum], namebuf, size-1); |
| 997 | pi->syscall_names[callnum][size-1] = '\0'; |
| 998 | } |
| 999 | |
| 1000 | close (sysent_fd); |
| 1001 | xfree (syscalls); |
| 1002 | } |
| 1003 | |
| 1004 | /* Function: free_syscalls |
| 1005 | |
| 1006 | Free the space allocated for the syscall names from the procinfo |
| 1007 | structure. */ |
| 1008 | |
| 1009 | static void |
| 1010 | free_syscalls (procinfo *pi) |
| 1011 | { |
| 1012 | if (pi->syscall_names) |
| 1013 | { |
| 1014 | int i; |
| 1015 | |
| 1016 | for (i = 0; i < pi->num_syscalls; i++) |
| 1017 | if (pi->syscall_names[i] != NULL) |
| 1018 | xfree (pi->syscall_names[i]); |
| 1019 | |
| 1020 | xfree (pi->syscall_names); |
| 1021 | pi->syscall_names = 0; |
| 1022 | } |
| 1023 | } |
| 1024 | |
| 1025 | /* Function: find_syscall |
| 1026 | |
| 1027 | Given a name, look up (and return) the corresponding syscall number. |
| 1028 | If no match is found, return -1. */ |
| 1029 | |
| 1030 | static int |
| 1031 | find_syscall (procinfo *pi, char *name) |
| 1032 | { |
| 1033 | int i; |
| 1034 | for (i = 0; i < pi->num_syscalls; i++) |
| 1035 | { |
| 1036 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) |
| 1037 | return i; |
| 1038 | } |
| 1039 | return -1; |
| 1040 | } |
| 1041 | #endif |
| 1042 | |
| 1043 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
| 1044 | |
| 1045 | /* =================== /proc "MODULE" =================== */ |
| 1046 | |
| 1047 | /* |
| 1048 | * This "module" is the interface layer between the /proc system API |
| 1049 | * and the gdb target vector functions. This layer consists of |
| 1050 | * access functions that encapsulate each of the basic operations |
| 1051 | * that we need to use from the /proc API. |
| 1052 | * |
| 1053 | * The main motivation for this layer is to hide the fact that |
| 1054 | * there are two very different implementations of the /proc API. |
| 1055 | * Rather than have a bunch of #ifdefs all thru the gdb target vector |
| 1056 | * functions, we do our best to hide them all in here. |
| 1057 | */ |
| 1058 | |
| 1059 | int proc_get_status (procinfo * pi); |
| 1060 | long proc_flags (procinfo * pi); |
| 1061 | int proc_why (procinfo * pi); |
| 1062 | int proc_what (procinfo * pi); |
| 1063 | int proc_set_run_on_last_close (procinfo * pi); |
| 1064 | int proc_unset_run_on_last_close (procinfo * pi); |
| 1065 | int proc_set_inherit_on_fork (procinfo * pi); |
| 1066 | int proc_unset_inherit_on_fork (procinfo * pi); |
| 1067 | int proc_set_async (procinfo * pi); |
| 1068 | int proc_unset_async (procinfo * pi); |
| 1069 | int proc_stop_process (procinfo * pi); |
| 1070 | int proc_trace_signal (procinfo * pi, int signo); |
| 1071 | int proc_ignore_signal (procinfo * pi, int signo); |
| 1072 | int proc_clear_current_fault (procinfo * pi); |
| 1073 | int proc_set_current_signal (procinfo * pi, int signo); |
| 1074 | int proc_clear_current_signal (procinfo * pi); |
| 1075 | int proc_set_gregs (procinfo * pi); |
| 1076 | int proc_set_fpregs (procinfo * pi); |
| 1077 | int proc_wait_for_stop (procinfo * pi); |
| 1078 | int proc_run_process (procinfo * pi, int step, int signo); |
| 1079 | int proc_kill (procinfo * pi, int signo); |
| 1080 | int proc_parent_pid (procinfo * pi); |
| 1081 | int proc_get_nthreads (procinfo * pi); |
| 1082 | int proc_get_current_thread (procinfo * pi); |
| 1083 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
| 1084 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
| 1085 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); |
| 1086 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); |
| 1087 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
| 1088 | |
| 1089 | int proc_update_threads (procinfo * pi); |
| 1090 | int proc_iterate_over_threads (procinfo * pi, |
| 1091 | int (*func) (procinfo *, procinfo *, void *), |
| 1092 | void *ptr); |
| 1093 | |
| 1094 | gdb_gregset_t *proc_get_gregs (procinfo * pi); |
| 1095 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); |
| 1096 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); |
| 1097 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); |
| 1098 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); |
| 1099 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
| 1100 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); |
| 1101 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); |
| 1102 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); |
| 1103 | |
| 1104 | void proc_warn (procinfo * pi, char *func, int line); |
| 1105 | void proc_error (procinfo * pi, char *func, int line); |
| 1106 | |
| 1107 | void |
| 1108 | proc_warn (procinfo *pi, char *func, int line) |
| 1109 | { |
| 1110 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); |
| 1111 | print_sys_errmsg (errmsg, errno); |
| 1112 | } |
| 1113 | |
| 1114 | void |
| 1115 | proc_error (procinfo *pi, char *func, int line) |
| 1116 | { |
| 1117 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); |
| 1118 | perror_with_name (errmsg); |
| 1119 | } |
| 1120 | |
| 1121 | /* |
| 1122 | * Function: proc_get_status |
| 1123 | * |
| 1124 | * Updates the status struct in the procinfo. |
| 1125 | * There is a 'valid' flag, to let other functions know when |
| 1126 | * this function needs to be called (so the status is only |
| 1127 | * read when it is needed). The status file descriptor is |
| 1128 | * also only opened when it is needed. |
| 1129 | * |
| 1130 | * Return: non-zero for success, zero for failure. |
| 1131 | */ |
| 1132 | |
| 1133 | int |
| 1134 | proc_get_status (procinfo *pi) |
| 1135 | { |
| 1136 | /* Status file descriptor is opened "lazily" */ |
| 1137 | if (pi->status_fd == 0 && |
| 1138 | open_procinfo_files (pi, FD_STATUS) == 0) |
| 1139 | { |
| 1140 | pi->status_valid = 0; |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | #ifdef NEW_PROC_API |
| 1145 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
| 1146 | pi->status_valid = 0; /* fail */ |
| 1147 | else |
| 1148 | { |
| 1149 | /* Sigh... I have to read a different data structure, |
| 1150 | depending on whether this is a main process or an LWP. */ |
| 1151 | if (pi->tid) |
| 1152 | pi->status_valid = (read (pi->status_fd, |
| 1153 | (char *) &pi->prstatus.pr_lwp, |
| 1154 | sizeof (lwpstatus_t)) |
| 1155 | == sizeof (lwpstatus_t)); |
| 1156 | else |
| 1157 | { |
| 1158 | pi->status_valid = (read (pi->status_fd, |
| 1159 | (char *) &pi->prstatus, |
| 1160 | sizeof (gdb_prstatus_t)) |
| 1161 | == sizeof (gdb_prstatus_t)); |
| 1162 | #if 0 /*def UNIXWARE*/ |
| 1163 | if (pi->status_valid && |
| 1164 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && |
| 1165 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) |
| 1166 | /* Unixware peculiarity -- read the damn thing again! */ |
| 1167 | pi->status_valid = (read (pi->status_fd, |
| 1168 | (char *) &pi->prstatus, |
| 1169 | sizeof (gdb_prstatus_t)) |
| 1170 | == sizeof (gdb_prstatus_t)); |
| 1171 | #endif /* UNIXWARE */ |
| 1172 | } |
| 1173 | } |
| 1174 | #else /* ioctl method */ |
| 1175 | #ifdef PIOCTSTATUS /* osf */ |
| 1176 | if (pi->tid == 0) /* main process */ |
| 1177 | { |
| 1178 | /* Just read the danged status. Now isn't that simple? */ |
| 1179 | pi->status_valid = |
| 1180 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
| 1181 | } |
| 1182 | else |
| 1183 | { |
| 1184 | int win; |
| 1185 | struct { |
| 1186 | long pr_count; |
| 1187 | tid_t pr_error_thread; |
| 1188 | struct prstatus status; |
| 1189 | } thread_status; |
| 1190 | |
| 1191 | thread_status.pr_count = 1; |
| 1192 | thread_status.status.pr_tid = pi->tid; |
| 1193 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); |
| 1194 | if (win) |
| 1195 | { |
| 1196 | memcpy (&pi->prstatus, &thread_status.status, |
| 1197 | sizeof (pi->prstatus)); |
| 1198 | pi->status_valid = 1; |
| 1199 | } |
| 1200 | } |
| 1201 | #else |
| 1202 | /* Just read the danged status. Now isn't that simple? */ |
| 1203 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
| 1204 | #endif |
| 1205 | #endif |
| 1206 | |
| 1207 | if (pi->status_valid) |
| 1208 | { |
| 1209 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
| 1210 | proc_why (pi), |
| 1211 | proc_what (pi), |
| 1212 | proc_get_current_thread (pi)); |
| 1213 | } |
| 1214 | |
| 1215 | /* The status struct includes general regs, so mark them valid too */ |
| 1216 | pi->gregs_valid = pi->status_valid; |
| 1217 | #ifdef NEW_PROC_API |
| 1218 | /* In the read/write multiple-fd model, |
| 1219 | the status struct includes the fp regs too, so mark them valid too */ |
| 1220 | pi->fpregs_valid = pi->status_valid; |
| 1221 | #endif |
| 1222 | return pi->status_valid; /* True if success, false if failure. */ |
| 1223 | } |
| 1224 | |
| 1225 | /* |
| 1226 | * Function: proc_flags |
| 1227 | * |
| 1228 | * returns the process flags (pr_flags field). |
| 1229 | */ |
| 1230 | |
| 1231 | long |
| 1232 | proc_flags (procinfo *pi) |
| 1233 | { |
| 1234 | if (!pi->status_valid) |
| 1235 | if (!proc_get_status (pi)) |
| 1236 | return 0; /* FIXME: not a good failure value (but what is?) */ |
| 1237 | |
| 1238 | #ifdef NEW_PROC_API |
| 1239 | # ifdef UNIXWARE |
| 1240 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in |
| 1241 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. |
| 1242 | The two sets of flags don't overlap. */ |
| 1243 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; |
| 1244 | # else |
| 1245 | return pi->prstatus.pr_lwp.pr_flags; |
| 1246 | # endif |
| 1247 | #else |
| 1248 | return pi->prstatus.pr_flags; |
| 1249 | #endif |
| 1250 | } |
| 1251 | |
| 1252 | /* |
| 1253 | * Function: proc_why |
| 1254 | * |
| 1255 | * returns the pr_why field (why the process stopped). |
| 1256 | */ |
| 1257 | |
| 1258 | int |
| 1259 | proc_why (procinfo *pi) |
| 1260 | { |
| 1261 | if (!pi->status_valid) |
| 1262 | if (!proc_get_status (pi)) |
| 1263 | return 0; /* FIXME: not a good failure value (but what is?) */ |
| 1264 | |
| 1265 | #ifdef NEW_PROC_API |
| 1266 | return pi->prstatus.pr_lwp.pr_why; |
| 1267 | #else |
| 1268 | return pi->prstatus.pr_why; |
| 1269 | #endif |
| 1270 | } |
| 1271 | |
| 1272 | /* |
| 1273 | * Function: proc_what |
| 1274 | * |
| 1275 | * returns the pr_what field (details of why the process stopped). |
| 1276 | */ |
| 1277 | |
| 1278 | int |
| 1279 | proc_what (procinfo *pi) |
| 1280 | { |
| 1281 | if (!pi->status_valid) |
| 1282 | if (!proc_get_status (pi)) |
| 1283 | return 0; /* FIXME: not a good failure value (but what is?) */ |
| 1284 | |
| 1285 | #ifdef NEW_PROC_API |
| 1286 | return pi->prstatus.pr_lwp.pr_what; |
| 1287 | #else |
| 1288 | return pi->prstatus.pr_what; |
| 1289 | #endif |
| 1290 | } |
| 1291 | |
| 1292 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
| 1293 | /* |
| 1294 | * Function: proc_nsysarg |
| 1295 | * |
| 1296 | * returns the pr_nsysarg field (number of args to the current syscall). |
| 1297 | */ |
| 1298 | |
| 1299 | int |
| 1300 | proc_nsysarg (procinfo *pi) |
| 1301 | { |
| 1302 | if (!pi->status_valid) |
| 1303 | if (!proc_get_status (pi)) |
| 1304 | return 0; |
| 1305 | |
| 1306 | #ifdef NEW_PROC_API |
| 1307 | return pi->prstatus.pr_lwp.pr_nsysarg; |
| 1308 | #else |
| 1309 | return pi->prstatus.pr_nsysarg; |
| 1310 | #endif |
| 1311 | } |
| 1312 | |
| 1313 | /* |
| 1314 | * Function: proc_sysargs |
| 1315 | * |
| 1316 | * returns the pr_sysarg field (pointer to the arguments of current syscall). |
| 1317 | */ |
| 1318 | |
| 1319 | long * |
| 1320 | proc_sysargs (procinfo *pi) |
| 1321 | { |
| 1322 | if (!pi->status_valid) |
| 1323 | if (!proc_get_status (pi)) |
| 1324 | return NULL; |
| 1325 | |
| 1326 | #ifdef NEW_PROC_API |
| 1327 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
| 1328 | #else |
| 1329 | return (long *) &pi->prstatus.pr_sysarg; |
| 1330 | #endif |
| 1331 | } |
| 1332 | |
| 1333 | /* |
| 1334 | * Function: proc_syscall |
| 1335 | * |
| 1336 | * returns the pr_syscall field (id of current syscall if we are in one). |
| 1337 | */ |
| 1338 | |
| 1339 | int |
| 1340 | proc_syscall (procinfo *pi) |
| 1341 | { |
| 1342 | if (!pi->status_valid) |
| 1343 | if (!proc_get_status (pi)) |
| 1344 | return 0; |
| 1345 | |
| 1346 | #ifdef NEW_PROC_API |
| 1347 | return pi->prstatus.pr_lwp.pr_syscall; |
| 1348 | #else |
| 1349 | return pi->prstatus.pr_syscall; |
| 1350 | #endif |
| 1351 | } |
| 1352 | #endif /* PIOCSSPCACT */ |
| 1353 | |
| 1354 | /* |
| 1355 | * Function: proc_cursig: |
| 1356 | * |
| 1357 | * returns the pr_cursig field (current signal). |
| 1358 | */ |
| 1359 | |
| 1360 | long |
| 1361 | proc_cursig (struct procinfo *pi) |
| 1362 | { |
| 1363 | if (!pi->status_valid) |
| 1364 | if (!proc_get_status (pi)) |
| 1365 | return 0; /* FIXME: not a good failure value (but what is?) */ |
| 1366 | |
| 1367 | #ifdef NEW_PROC_API |
| 1368 | return pi->prstatus.pr_lwp.pr_cursig; |
| 1369 | #else |
| 1370 | return pi->prstatus.pr_cursig; |
| 1371 | #endif |
| 1372 | } |
| 1373 | |
| 1374 | /* |
| 1375 | * Function: proc_modify_flag |
| 1376 | * |
| 1377 | * === I appologize for the messiness of this function. |
| 1378 | * === This is an area where the different versions of |
| 1379 | * === /proc are more inconsistent than usual. MVS |
| 1380 | * |
| 1381 | * Set or reset any of the following process flags: |
| 1382 | * PR_FORK -- forked child will inherit trace flags |
| 1383 | * PR_RLC -- traced process runs when last /proc file closed. |
| 1384 | * PR_KLC -- traced process is killed when last /proc file closed. |
| 1385 | * PR_ASYNC -- LWP's get to run/stop independently. |
| 1386 | * |
| 1387 | * There are three methods for doing this function: |
| 1388 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] |
| 1389 | * [Sol6, Sol7, UW] |
| 1390 | * 2) Middle: PIOCSET/PIOCRESET |
| 1391 | * [Irix, Sol5] |
| 1392 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC |
| 1393 | * [OSF, Sol5] |
| 1394 | * |
| 1395 | * Note: Irix does not define PR_ASYNC. |
| 1396 | * Note: OSF does not define PR_KLC. |
| 1397 | * Note: OSF is the only one that can ONLY use the oldest method. |
| 1398 | * |
| 1399 | * Arguments: |
| 1400 | * pi -- the procinfo |
| 1401 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC |
| 1402 | * mode -- 1 for set, 0 for reset. |
| 1403 | * |
| 1404 | * Returns non-zero for success, zero for failure. |
| 1405 | */ |
| 1406 | |
| 1407 | enum { FLAG_RESET, FLAG_SET }; |
| 1408 | |
| 1409 | static int |
| 1410 | proc_modify_flag (procinfo *pi, long flag, long mode) |
| 1411 | { |
| 1412 | long win = 0; /* default to fail */ |
| 1413 | |
| 1414 | /* |
| 1415 | * These operations affect the process as a whole, and applying |
| 1416 | * them to an individual LWP has the same meaning as applying them |
| 1417 | * to the main process. Therefore, if we're ever called with a |
| 1418 | * pointer to an LWP's procinfo, let's substitute the process's |
| 1419 | * procinfo and avoid opening the LWP's file descriptor |
| 1420 | * unnecessarily. |
| 1421 | */ |
| 1422 | |
| 1423 | if (pi->pid != 0) |
| 1424 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1425 | |
| 1426 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ |
| 1427 | /* First normalize the PCUNSET/PCRESET command opcode |
| 1428 | (which for no obvious reason has a different definition |
| 1429 | from one operating system to the next...) */ |
| 1430 | #ifdef PCUNSET |
| 1431 | #define GDBRESET PCUNSET |
| 1432 | #else |
| 1433 | #ifdef PCRESET |
| 1434 | #define GDBRESET PCRESET |
| 1435 | #endif |
| 1436 | #endif |
| 1437 | { |
| 1438 | procfs_ctl_t arg[2]; |
| 1439 | |
| 1440 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
| 1441 | arg[0] = PCSET; |
| 1442 | else /* Reset the flag */ |
| 1443 | arg[0] = GDBRESET; |
| 1444 | |
| 1445 | arg[1] = flag; |
| 1446 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 1447 | } |
| 1448 | #else |
| 1449 | #ifdef PIOCSET /* Irix/Sol5 method */ |
| 1450 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ |
| 1451 | { |
| 1452 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); |
| 1453 | } |
| 1454 | else /* Reset the flag */ |
| 1455 | { |
| 1456 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); |
| 1457 | } |
| 1458 | |
| 1459 | #else |
| 1460 | #ifdef PIOCSRLC /* Oldest method: OSF */ |
| 1461 | switch (flag) { |
| 1462 | case PR_RLC: |
| 1463 | if (mode == FLAG_SET) /* Set run-on-last-close */ |
| 1464 | { |
| 1465 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); |
| 1466 | } |
| 1467 | else /* Clear run-on-last-close */ |
| 1468 | { |
| 1469 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); |
| 1470 | } |
| 1471 | break; |
| 1472 | case PR_FORK: |
| 1473 | if (mode == FLAG_SET) /* Set inherit-on-fork */ |
| 1474 | { |
| 1475 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); |
| 1476 | } |
| 1477 | else /* Clear inherit-on-fork */ |
| 1478 | { |
| 1479 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); |
| 1480 | } |
| 1481 | break; |
| 1482 | default: |
| 1483 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ |
| 1484 | break; |
| 1485 | } |
| 1486 | #endif |
| 1487 | #endif |
| 1488 | #endif |
| 1489 | #undef GDBRESET |
| 1490 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
| 1491 | pi->status_valid = 0; |
| 1492 | |
| 1493 | if (!win) |
| 1494 | warning (_("procfs: modify_flag failed to turn %s %s"), |
| 1495 | flag == PR_FORK ? "PR_FORK" : |
| 1496 | flag == PR_RLC ? "PR_RLC" : |
| 1497 | #ifdef PR_ASYNC |
| 1498 | flag == PR_ASYNC ? "PR_ASYNC" : |
| 1499 | #endif |
| 1500 | #ifdef PR_KLC |
| 1501 | flag == PR_KLC ? "PR_KLC" : |
| 1502 | #endif |
| 1503 | "<unknown flag>", |
| 1504 | mode == FLAG_RESET ? "off" : "on"); |
| 1505 | |
| 1506 | return win; |
| 1507 | } |
| 1508 | |
| 1509 | /* |
| 1510 | * Function: proc_set_run_on_last_close |
| 1511 | * |
| 1512 | * Set the run_on_last_close flag. |
| 1513 | * Process with all threads will become runnable |
| 1514 | * when debugger closes all /proc fds. |
| 1515 | * |
| 1516 | * Returns non-zero for success, zero for failure. |
| 1517 | */ |
| 1518 | |
| 1519 | int |
| 1520 | proc_set_run_on_last_close (procinfo *pi) |
| 1521 | { |
| 1522 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
| 1523 | } |
| 1524 | |
| 1525 | /* |
| 1526 | * Function: proc_unset_run_on_last_close |
| 1527 | * |
| 1528 | * Reset the run_on_last_close flag. |
| 1529 | * Process will NOT become runnable |
| 1530 | * when debugger closes its file handles. |
| 1531 | * |
| 1532 | * Returns non-zero for success, zero for failure. |
| 1533 | */ |
| 1534 | |
| 1535 | int |
| 1536 | proc_unset_run_on_last_close (procinfo *pi) |
| 1537 | { |
| 1538 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); |
| 1539 | } |
| 1540 | |
| 1541 | #ifdef PR_KLC |
| 1542 | /* |
| 1543 | * Function: proc_set_kill_on_last_close |
| 1544 | * |
| 1545 | * Set the kill_on_last_close flag. |
| 1546 | * Process with all threads will be killed when debugger |
| 1547 | * closes all /proc fds (or debugger exits or dies). |
| 1548 | * |
| 1549 | * Returns non-zero for success, zero for failure. |
| 1550 | */ |
| 1551 | |
| 1552 | int |
| 1553 | proc_set_kill_on_last_close (procinfo *pi) |
| 1554 | { |
| 1555 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); |
| 1556 | } |
| 1557 | |
| 1558 | /* |
| 1559 | * Function: proc_unset_kill_on_last_close |
| 1560 | * |
| 1561 | * Reset the kill_on_last_close flag. |
| 1562 | * Process will NOT be killed when debugger |
| 1563 | * closes its file handles (or exits or dies). |
| 1564 | * |
| 1565 | * Returns non-zero for success, zero for failure. |
| 1566 | */ |
| 1567 | |
| 1568 | int |
| 1569 | proc_unset_kill_on_last_close (procinfo *pi) |
| 1570 | { |
| 1571 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); |
| 1572 | } |
| 1573 | #endif /* PR_KLC */ |
| 1574 | |
| 1575 | /* |
| 1576 | * Function: proc_set_inherit_on_fork |
| 1577 | * |
| 1578 | * Set inherit_on_fork flag. |
| 1579 | * If the process forks a child while we are registered for events |
| 1580 | * in the parent, then we will also recieve events from the child. |
| 1581 | * |
| 1582 | * Returns non-zero for success, zero for failure. |
| 1583 | */ |
| 1584 | |
| 1585 | int |
| 1586 | proc_set_inherit_on_fork (procinfo *pi) |
| 1587 | { |
| 1588 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); |
| 1589 | } |
| 1590 | |
| 1591 | /* |
| 1592 | * Function: proc_unset_inherit_on_fork |
| 1593 | * |
| 1594 | * Reset inherit_on_fork flag. |
| 1595 | * If the process forks a child while we are registered for events |
| 1596 | * in the parent, then we will NOT recieve events from the child. |
| 1597 | * |
| 1598 | * Returns non-zero for success, zero for failure. |
| 1599 | */ |
| 1600 | |
| 1601 | int |
| 1602 | proc_unset_inherit_on_fork (procinfo *pi) |
| 1603 | { |
| 1604 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); |
| 1605 | } |
| 1606 | |
| 1607 | #ifdef PR_ASYNC |
| 1608 | /* |
| 1609 | * Function: proc_set_async |
| 1610 | * |
| 1611 | * Set PR_ASYNC flag. |
| 1612 | * If one LWP stops because of a debug event (signal etc.), |
| 1613 | * the remaining LWPs will continue to run. |
| 1614 | * |
| 1615 | * Returns non-zero for success, zero for failure. |
| 1616 | */ |
| 1617 | |
| 1618 | int |
| 1619 | proc_set_async (procinfo *pi) |
| 1620 | { |
| 1621 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); |
| 1622 | } |
| 1623 | |
| 1624 | /* |
| 1625 | * Function: proc_unset_async |
| 1626 | * |
| 1627 | * Reset PR_ASYNC flag. |
| 1628 | * If one LWP stops because of a debug event (signal etc.), |
| 1629 | * then all other LWPs will stop as well. |
| 1630 | * |
| 1631 | * Returns non-zero for success, zero for failure. |
| 1632 | */ |
| 1633 | |
| 1634 | int |
| 1635 | proc_unset_async (procinfo *pi) |
| 1636 | { |
| 1637 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); |
| 1638 | } |
| 1639 | #endif /* PR_ASYNC */ |
| 1640 | |
| 1641 | /* |
| 1642 | * Function: proc_stop_process |
| 1643 | * |
| 1644 | * Request the process/LWP to stop. Does not wait. |
| 1645 | * Returns non-zero for success, zero for failure. |
| 1646 | */ |
| 1647 | |
| 1648 | int |
| 1649 | proc_stop_process (procinfo *pi) |
| 1650 | { |
| 1651 | int win; |
| 1652 | |
| 1653 | /* |
| 1654 | * We might conceivably apply this operation to an LWP, and |
| 1655 | * the LWP's ctl file descriptor might not be open. |
| 1656 | */ |
| 1657 | |
| 1658 | if (pi->ctl_fd == 0 && |
| 1659 | open_procinfo_files (pi, FD_CTL) == 0) |
| 1660 | return 0; |
| 1661 | else |
| 1662 | { |
| 1663 | #ifdef NEW_PROC_API |
| 1664 | procfs_ctl_t cmd = PCSTOP; |
| 1665 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 1666 | #else /* ioctl method */ |
| 1667 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); |
| 1668 | /* Note: the call also reads the prstatus. */ |
| 1669 | if (win) |
| 1670 | { |
| 1671 | pi->status_valid = 1; |
| 1672 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
| 1673 | proc_why (pi), |
| 1674 | proc_what (pi), |
| 1675 | proc_get_current_thread (pi)); |
| 1676 | } |
| 1677 | #endif |
| 1678 | } |
| 1679 | |
| 1680 | return win; |
| 1681 | } |
| 1682 | |
| 1683 | /* |
| 1684 | * Function: proc_wait_for_stop |
| 1685 | * |
| 1686 | * Wait for the process or LWP to stop (block until it does). |
| 1687 | * Returns non-zero for success, zero for failure. |
| 1688 | */ |
| 1689 | |
| 1690 | int |
| 1691 | proc_wait_for_stop (procinfo *pi) |
| 1692 | { |
| 1693 | int win; |
| 1694 | |
| 1695 | /* |
| 1696 | * We should never have to apply this operation to any procinfo |
| 1697 | * except the one for the main process. If that ever changes |
| 1698 | * for any reason, then take out the following clause and |
| 1699 | * replace it with one that makes sure the ctl_fd is open. |
| 1700 | */ |
| 1701 | |
| 1702 | if (pi->tid != 0) |
| 1703 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1704 | |
| 1705 | #ifdef NEW_PROC_API |
| 1706 | { |
| 1707 | procfs_ctl_t cmd = PCWSTOP; |
| 1708 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 1709 | /* We been runnin' and we stopped -- need to update status. */ |
| 1710 | pi->status_valid = 0; |
| 1711 | } |
| 1712 | #else /* ioctl method */ |
| 1713 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); |
| 1714 | /* Above call also refreshes the prstatus. */ |
| 1715 | if (win) |
| 1716 | { |
| 1717 | pi->status_valid = 1; |
| 1718 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
| 1719 | proc_why (pi), |
| 1720 | proc_what (pi), |
| 1721 | proc_get_current_thread (pi)); |
| 1722 | } |
| 1723 | #endif |
| 1724 | |
| 1725 | return win; |
| 1726 | } |
| 1727 | |
| 1728 | /* |
| 1729 | * Function: proc_run_process |
| 1730 | * |
| 1731 | * Make the process or LWP runnable. |
| 1732 | * Options (not all are implemented): |
| 1733 | * - single-step |
| 1734 | * - clear current fault |
| 1735 | * - clear current signal |
| 1736 | * - abort the current system call |
| 1737 | * - stop as soon as finished with system call |
| 1738 | * - (ioctl): set traced signal set |
| 1739 | * - (ioctl): set held signal set |
| 1740 | * - (ioctl): set traced fault set |
| 1741 | * - (ioctl): set start pc (vaddr) |
| 1742 | * Always clear the current fault. |
| 1743 | * Clear the current signal if 'signo' is zero. |
| 1744 | * |
| 1745 | * Arguments: |
| 1746 | * pi the process or LWP to operate on. |
| 1747 | * step if true, set the process or LWP to trap after one instr. |
| 1748 | * signo if zero, clear the current signal if any. |
| 1749 | * if non-zero, set the current signal to this one. |
| 1750 | * |
| 1751 | * Returns non-zero for success, zero for failure. |
| 1752 | */ |
| 1753 | |
| 1754 | int |
| 1755 | proc_run_process (procinfo *pi, int step, int signo) |
| 1756 | { |
| 1757 | int win; |
| 1758 | int runflags; |
| 1759 | |
| 1760 | /* |
| 1761 | * We will probably have to apply this operation to individual threads, |
| 1762 | * so make sure the control file descriptor is open. |
| 1763 | */ |
| 1764 | |
| 1765 | if (pi->ctl_fd == 0 && |
| 1766 | open_procinfo_files (pi, FD_CTL) == 0) |
| 1767 | { |
| 1768 | return 0; |
| 1769 | } |
| 1770 | |
| 1771 | runflags = PRCFAULT; /* always clear current fault */ |
| 1772 | if (step) |
| 1773 | runflags |= PRSTEP; |
| 1774 | if (signo == 0) |
| 1775 | runflags |= PRCSIG; |
| 1776 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ |
| 1777 | proc_set_current_signal (pi, signo); |
| 1778 | |
| 1779 | #ifdef NEW_PROC_API |
| 1780 | { |
| 1781 | procfs_ctl_t cmd[2]; |
| 1782 | |
| 1783 | cmd[0] = PCRUN; |
| 1784 | cmd[1] = runflags; |
| 1785 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 1786 | } |
| 1787 | #else /* ioctl method */ |
| 1788 | { |
| 1789 | prrun_t prrun; |
| 1790 | |
| 1791 | memset (&prrun, 0, sizeof (prrun)); |
| 1792 | prrun.pr_flags = runflags; |
| 1793 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); |
| 1794 | } |
| 1795 | #endif |
| 1796 | |
| 1797 | return win; |
| 1798 | } |
| 1799 | |
| 1800 | /* |
| 1801 | * Function: proc_set_traced_signals |
| 1802 | * |
| 1803 | * Register to trace signals in the process or LWP. |
| 1804 | * Returns non-zero for success, zero for failure. |
| 1805 | */ |
| 1806 | |
| 1807 | int |
| 1808 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
| 1809 | { |
| 1810 | int win; |
| 1811 | |
| 1812 | /* |
| 1813 | * We should never have to apply this operation to any procinfo |
| 1814 | * except the one for the main process. If that ever changes |
| 1815 | * for any reason, then take out the following clause and |
| 1816 | * replace it with one that makes sure the ctl_fd is open. |
| 1817 | */ |
| 1818 | |
| 1819 | if (pi->tid != 0) |
| 1820 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1821 | |
| 1822 | #ifdef NEW_PROC_API |
| 1823 | { |
| 1824 | struct { |
| 1825 | procfs_ctl_t cmd; |
| 1826 | /* Use char array to avoid alignment issues. */ |
| 1827 | char sigset[sizeof (gdb_sigset_t)]; |
| 1828 | } arg; |
| 1829 | |
| 1830 | arg.cmd = PCSTRACE; |
| 1831 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
| 1832 | |
| 1833 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
| 1834 | } |
| 1835 | #else /* ioctl method */ |
| 1836 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); |
| 1837 | #endif |
| 1838 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
| 1839 | pi->status_valid = 0; |
| 1840 | |
| 1841 | if (!win) |
| 1842 | warning (_("procfs: set_traced_signals failed")); |
| 1843 | return win; |
| 1844 | } |
| 1845 | |
| 1846 | /* |
| 1847 | * Function: proc_set_traced_faults |
| 1848 | * |
| 1849 | * Register to trace hardware faults in the process or LWP. |
| 1850 | * Returns non-zero for success, zero for failure. |
| 1851 | */ |
| 1852 | |
| 1853 | int |
| 1854 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
| 1855 | { |
| 1856 | int win; |
| 1857 | |
| 1858 | /* |
| 1859 | * We should never have to apply this operation to any procinfo |
| 1860 | * except the one for the main process. If that ever changes |
| 1861 | * for any reason, then take out the following clause and |
| 1862 | * replace it with one that makes sure the ctl_fd is open. |
| 1863 | */ |
| 1864 | |
| 1865 | if (pi->tid != 0) |
| 1866 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1867 | |
| 1868 | #ifdef NEW_PROC_API |
| 1869 | { |
| 1870 | struct { |
| 1871 | procfs_ctl_t cmd; |
| 1872 | /* Use char array to avoid alignment issues. */ |
| 1873 | char fltset[sizeof (fltset_t)]; |
| 1874 | } arg; |
| 1875 | |
| 1876 | arg.cmd = PCSFAULT; |
| 1877 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); |
| 1878 | |
| 1879 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
| 1880 | } |
| 1881 | #else /* ioctl method */ |
| 1882 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); |
| 1883 | #endif |
| 1884 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
| 1885 | pi->status_valid = 0; |
| 1886 | |
| 1887 | return win; |
| 1888 | } |
| 1889 | |
| 1890 | /* |
| 1891 | * Function: proc_set_traced_sysentry |
| 1892 | * |
| 1893 | * Register to trace entry to system calls in the process or LWP. |
| 1894 | * Returns non-zero for success, zero for failure. |
| 1895 | */ |
| 1896 | |
| 1897 | int |
| 1898 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
| 1899 | { |
| 1900 | int win; |
| 1901 | |
| 1902 | /* |
| 1903 | * We should never have to apply this operation to any procinfo |
| 1904 | * except the one for the main process. If that ever changes |
| 1905 | * for any reason, then take out the following clause and |
| 1906 | * replace it with one that makes sure the ctl_fd is open. |
| 1907 | */ |
| 1908 | |
| 1909 | if (pi->tid != 0) |
| 1910 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1911 | |
| 1912 | #ifdef NEW_PROC_API |
| 1913 | { |
| 1914 | struct gdb_proc_ctl_pcsentry { |
| 1915 | procfs_ctl_t cmd; |
| 1916 | /* Use char array to avoid alignment issues. */ |
| 1917 | char sysset[sizeof (sysset_t)]; |
| 1918 | } *argp; |
| 1919 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) |
| 1920 | - sizeof (sysset_t) |
| 1921 | + sysset_t_size (pi); |
| 1922 | |
| 1923 | argp = xmalloc (argp_size); |
| 1924 | |
| 1925 | argp->cmd = PCSENTRY; |
| 1926 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); |
| 1927 | |
| 1928 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
| 1929 | xfree (argp); |
| 1930 | } |
| 1931 | #else /* ioctl method */ |
| 1932 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); |
| 1933 | #endif |
| 1934 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
| 1935 | pi->status_valid = 0; |
| 1936 | |
| 1937 | return win; |
| 1938 | } |
| 1939 | |
| 1940 | /* |
| 1941 | * Function: proc_set_traced_sysexit |
| 1942 | * |
| 1943 | * Register to trace exit from system calls in the process or LWP. |
| 1944 | * Returns non-zero for success, zero for failure. |
| 1945 | */ |
| 1946 | |
| 1947 | int |
| 1948 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
| 1949 | { |
| 1950 | int win; |
| 1951 | |
| 1952 | /* |
| 1953 | * We should never have to apply this operation to any procinfo |
| 1954 | * except the one for the main process. If that ever changes |
| 1955 | * for any reason, then take out the following clause and |
| 1956 | * replace it with one that makes sure the ctl_fd is open. |
| 1957 | */ |
| 1958 | |
| 1959 | if (pi->tid != 0) |
| 1960 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1961 | |
| 1962 | #ifdef NEW_PROC_API |
| 1963 | { |
| 1964 | struct gdb_proc_ctl_pcsexit { |
| 1965 | procfs_ctl_t cmd; |
| 1966 | /* Use char array to avoid alignment issues. */ |
| 1967 | char sysset[sizeof (sysset_t)]; |
| 1968 | } *argp; |
| 1969 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) |
| 1970 | - sizeof (sysset_t) |
| 1971 | + sysset_t_size (pi); |
| 1972 | |
| 1973 | argp = xmalloc (argp_size); |
| 1974 | |
| 1975 | argp->cmd = PCSEXIT; |
| 1976 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); |
| 1977 | |
| 1978 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
| 1979 | xfree (argp); |
| 1980 | } |
| 1981 | #else /* ioctl method */ |
| 1982 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); |
| 1983 | #endif |
| 1984 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
| 1985 | pi->status_valid = 0; |
| 1986 | |
| 1987 | return win; |
| 1988 | } |
| 1989 | |
| 1990 | /* |
| 1991 | * Function: proc_set_held_signals |
| 1992 | * |
| 1993 | * Specify the set of blocked / held signals in the process or LWP. |
| 1994 | * Returns non-zero for success, zero for failure. |
| 1995 | */ |
| 1996 | |
| 1997 | int |
| 1998 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
| 1999 | { |
| 2000 | int win; |
| 2001 | |
| 2002 | /* |
| 2003 | * We should never have to apply this operation to any procinfo |
| 2004 | * except the one for the main process. If that ever changes |
| 2005 | * for any reason, then take out the following clause and |
| 2006 | * replace it with one that makes sure the ctl_fd is open. |
| 2007 | */ |
| 2008 | |
| 2009 | if (pi->tid != 0) |
| 2010 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2011 | |
| 2012 | #ifdef NEW_PROC_API |
| 2013 | { |
| 2014 | struct { |
| 2015 | procfs_ctl_t cmd; |
| 2016 | /* Use char array to avoid alignment issues. */ |
| 2017 | char hold[sizeof (gdb_sigset_t)]; |
| 2018 | } arg; |
| 2019 | |
| 2020 | arg.cmd = PCSHOLD; |
| 2021 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
| 2022 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2023 | } |
| 2024 | #else |
| 2025 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
| 2026 | #endif |
| 2027 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
| 2028 | pi->status_valid = 0; |
| 2029 | |
| 2030 | return win; |
| 2031 | } |
| 2032 | |
| 2033 | /* |
| 2034 | * Function: proc_get_pending_signals |
| 2035 | * |
| 2036 | * returns the set of signals that are pending in the process or LWP. |
| 2037 | * Will also copy the sigset if 'save' is non-zero. |
| 2038 | */ |
| 2039 | |
| 2040 | gdb_sigset_t * |
| 2041 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) |
| 2042 | { |
| 2043 | gdb_sigset_t *ret = NULL; |
| 2044 | |
| 2045 | /* |
| 2046 | * We should never have to apply this operation to any procinfo |
| 2047 | * except the one for the main process. If that ever changes |
| 2048 | * for any reason, then take out the following clause and |
| 2049 | * replace it with one that makes sure the ctl_fd is open. |
| 2050 | */ |
| 2051 | |
| 2052 | if (pi->tid != 0) |
| 2053 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2054 | |
| 2055 | if (!pi->status_valid) |
| 2056 | if (!proc_get_status (pi)) |
| 2057 | return NULL; |
| 2058 | |
| 2059 | #ifdef NEW_PROC_API |
| 2060 | ret = &pi->prstatus.pr_lwp.pr_lwppend; |
| 2061 | #else |
| 2062 | ret = &pi->prstatus.pr_sigpend; |
| 2063 | #endif |
| 2064 | if (save && ret) |
| 2065 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
| 2066 | |
| 2067 | return ret; |
| 2068 | } |
| 2069 | |
| 2070 | /* |
| 2071 | * Function: proc_get_signal_actions |
| 2072 | * |
| 2073 | * returns the set of signal actions. |
| 2074 | * Will also copy the sigactionset if 'save' is non-zero. |
| 2075 | */ |
| 2076 | |
| 2077 | gdb_sigaction_t * |
| 2078 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) |
| 2079 | { |
| 2080 | gdb_sigaction_t *ret = NULL; |
| 2081 | |
| 2082 | /* |
| 2083 | * We should never have to apply this operation to any procinfo |
| 2084 | * except the one for the main process. If that ever changes |
| 2085 | * for any reason, then take out the following clause and |
| 2086 | * replace it with one that makes sure the ctl_fd is open. |
| 2087 | */ |
| 2088 | |
| 2089 | if (pi->tid != 0) |
| 2090 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2091 | |
| 2092 | if (!pi->status_valid) |
| 2093 | if (!proc_get_status (pi)) |
| 2094 | return NULL; |
| 2095 | |
| 2096 | #ifdef NEW_PROC_API |
| 2097 | ret = &pi->prstatus.pr_lwp.pr_action; |
| 2098 | #else |
| 2099 | ret = &pi->prstatus.pr_action; |
| 2100 | #endif |
| 2101 | if (save && ret) |
| 2102 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
| 2103 | |
| 2104 | return ret; |
| 2105 | } |
| 2106 | |
| 2107 | /* |
| 2108 | * Function: proc_get_held_signals |
| 2109 | * |
| 2110 | * returns the set of signals that are held / blocked. |
| 2111 | * Will also copy the sigset if 'save' is non-zero. |
| 2112 | */ |
| 2113 | |
| 2114 | gdb_sigset_t * |
| 2115 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) |
| 2116 | { |
| 2117 | gdb_sigset_t *ret = NULL; |
| 2118 | |
| 2119 | /* |
| 2120 | * We should never have to apply this operation to any procinfo |
| 2121 | * except the one for the main process. If that ever changes |
| 2122 | * for any reason, then take out the following clause and |
| 2123 | * replace it with one that makes sure the ctl_fd is open. |
| 2124 | */ |
| 2125 | |
| 2126 | if (pi->tid != 0) |
| 2127 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2128 | |
| 2129 | #ifdef NEW_PROC_API |
| 2130 | if (!pi->status_valid) |
| 2131 | if (!proc_get_status (pi)) |
| 2132 | return NULL; |
| 2133 | |
| 2134 | #ifdef UNIXWARE |
| 2135 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; |
| 2136 | #else |
| 2137 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
| 2138 | #endif /* UNIXWARE */ |
| 2139 | #else /* not NEW_PROC_API */ |
| 2140 | { |
| 2141 | static gdb_sigset_t sigheld; |
| 2142 | |
| 2143 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) |
| 2144 | ret = &sigheld; |
| 2145 | } |
| 2146 | #endif /* NEW_PROC_API */ |
| 2147 | if (save && ret) |
| 2148 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
| 2149 | |
| 2150 | return ret; |
| 2151 | } |
| 2152 | |
| 2153 | /* |
| 2154 | * Function: proc_get_traced_signals |
| 2155 | * |
| 2156 | * returns the set of signals that are traced / debugged. |
| 2157 | * Will also copy the sigset if 'save' is non-zero. |
| 2158 | */ |
| 2159 | |
| 2160 | gdb_sigset_t * |
| 2161 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) |
| 2162 | { |
| 2163 | gdb_sigset_t *ret = NULL; |
| 2164 | |
| 2165 | /* |
| 2166 | * We should never have to apply this operation to any procinfo |
| 2167 | * except the one for the main process. If that ever changes |
| 2168 | * for any reason, then take out the following clause and |
| 2169 | * replace it with one that makes sure the ctl_fd is open. |
| 2170 | */ |
| 2171 | |
| 2172 | if (pi->tid != 0) |
| 2173 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2174 | |
| 2175 | #ifdef NEW_PROC_API |
| 2176 | if (!pi->status_valid) |
| 2177 | if (!proc_get_status (pi)) |
| 2178 | return NULL; |
| 2179 | |
| 2180 | ret = &pi->prstatus.pr_sigtrace; |
| 2181 | #else |
| 2182 | { |
| 2183 | static gdb_sigset_t sigtrace; |
| 2184 | |
| 2185 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) |
| 2186 | ret = &sigtrace; |
| 2187 | } |
| 2188 | #endif |
| 2189 | if (save && ret) |
| 2190 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
| 2191 | |
| 2192 | return ret; |
| 2193 | } |
| 2194 | |
| 2195 | /* |
| 2196 | * Function: proc_trace_signal |
| 2197 | * |
| 2198 | * Add 'signo' to the set of signals that are traced. |
| 2199 | * Returns non-zero for success, zero for failure. |
| 2200 | */ |
| 2201 | |
| 2202 | int |
| 2203 | proc_trace_signal (procinfo *pi, int signo) |
| 2204 | { |
| 2205 | gdb_sigset_t temp; |
| 2206 | |
| 2207 | /* |
| 2208 | * We should never have to apply this operation to any procinfo |
| 2209 | * except the one for the main process. If that ever changes |
| 2210 | * for any reason, then take out the following clause and |
| 2211 | * replace it with one that makes sure the ctl_fd is open. |
| 2212 | */ |
| 2213 | |
| 2214 | if (pi->tid != 0) |
| 2215 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2216 | |
| 2217 | if (pi) |
| 2218 | { |
| 2219 | if (proc_get_traced_signals (pi, &temp)) |
| 2220 | { |
| 2221 | praddset (&temp, signo); |
| 2222 | return proc_set_traced_signals (pi, &temp); |
| 2223 | } |
| 2224 | } |
| 2225 | |
| 2226 | return 0; /* failure */ |
| 2227 | } |
| 2228 | |
| 2229 | /* |
| 2230 | * Function: proc_ignore_signal |
| 2231 | * |
| 2232 | * Remove 'signo' from the set of signals that are traced. |
| 2233 | * Returns non-zero for success, zero for failure. |
| 2234 | */ |
| 2235 | |
| 2236 | int |
| 2237 | proc_ignore_signal (procinfo *pi, int signo) |
| 2238 | { |
| 2239 | gdb_sigset_t temp; |
| 2240 | |
| 2241 | /* |
| 2242 | * We should never have to apply this operation to any procinfo |
| 2243 | * except the one for the main process. If that ever changes |
| 2244 | * for any reason, then take out the following clause and |
| 2245 | * replace it with one that makes sure the ctl_fd is open. |
| 2246 | */ |
| 2247 | |
| 2248 | if (pi->tid != 0) |
| 2249 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2250 | |
| 2251 | if (pi) |
| 2252 | { |
| 2253 | if (proc_get_traced_signals (pi, &temp)) |
| 2254 | { |
| 2255 | prdelset (&temp, signo); |
| 2256 | return proc_set_traced_signals (pi, &temp); |
| 2257 | } |
| 2258 | } |
| 2259 | |
| 2260 | return 0; /* failure */ |
| 2261 | } |
| 2262 | |
| 2263 | /* |
| 2264 | * Function: proc_get_traced_faults |
| 2265 | * |
| 2266 | * returns the set of hardware faults that are traced /debugged. |
| 2267 | * Will also copy the faultset if 'save' is non-zero. |
| 2268 | */ |
| 2269 | |
| 2270 | fltset_t * |
| 2271 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
| 2272 | { |
| 2273 | fltset_t *ret = NULL; |
| 2274 | |
| 2275 | /* |
| 2276 | * We should never have to apply this operation to any procinfo |
| 2277 | * except the one for the main process. If that ever changes |
| 2278 | * for any reason, then take out the following clause and |
| 2279 | * replace it with one that makes sure the ctl_fd is open. |
| 2280 | */ |
| 2281 | |
| 2282 | if (pi->tid != 0) |
| 2283 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2284 | |
| 2285 | #ifdef NEW_PROC_API |
| 2286 | if (!pi->status_valid) |
| 2287 | if (!proc_get_status (pi)) |
| 2288 | return NULL; |
| 2289 | |
| 2290 | ret = &pi->prstatus.pr_flttrace; |
| 2291 | #else |
| 2292 | { |
| 2293 | static fltset_t flttrace; |
| 2294 | |
| 2295 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) |
| 2296 | ret = &flttrace; |
| 2297 | } |
| 2298 | #endif |
| 2299 | if (save && ret) |
| 2300 | memcpy (save, ret, sizeof (fltset_t)); |
| 2301 | |
| 2302 | return ret; |
| 2303 | } |
| 2304 | |
| 2305 | /* |
| 2306 | * Function: proc_get_traced_sysentry |
| 2307 | * |
| 2308 | * returns the set of syscalls that are traced /debugged on entry. |
| 2309 | * Will also copy the syscall set if 'save' is non-zero. |
| 2310 | */ |
| 2311 | |
| 2312 | sysset_t * |
| 2313 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
| 2314 | { |
| 2315 | sysset_t *ret = NULL; |
| 2316 | |
| 2317 | /* |
| 2318 | * We should never have to apply this operation to any procinfo |
| 2319 | * except the one for the main process. If that ever changes |
| 2320 | * for any reason, then take out the following clause and |
| 2321 | * replace it with one that makes sure the ctl_fd is open. |
| 2322 | */ |
| 2323 | |
| 2324 | if (pi->tid != 0) |
| 2325 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2326 | |
| 2327 | #ifdef NEW_PROC_API |
| 2328 | if (!pi->status_valid) |
| 2329 | if (!proc_get_status (pi)) |
| 2330 | return NULL; |
| 2331 | |
| 2332 | #ifndef DYNAMIC_SYSCALLS |
| 2333 | ret = &pi->prstatus.pr_sysentry; |
| 2334 | #else /* DYNAMIC_SYSCALLS */ |
| 2335 | { |
| 2336 | static sysset_t *sysentry; |
| 2337 | size_t size; |
| 2338 | |
| 2339 | if (!sysentry) |
| 2340 | sysentry = sysset_t_alloc (pi); |
| 2341 | ret = sysentry; |
| 2342 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) |
| 2343 | return NULL; |
| 2344 | if (pi->prstatus.pr_sysentry_offset == 0) |
| 2345 | { |
| 2346 | gdb_premptysysset (sysentry); |
| 2347 | } |
| 2348 | else |
| 2349 | { |
| 2350 | int rsize; |
| 2351 | |
| 2352 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, |
| 2353 | SEEK_SET) |
| 2354 | != (off_t) pi->prstatus.pr_sysentry_offset) |
| 2355 | return NULL; |
| 2356 | size = sysset_t_size (pi); |
| 2357 | gdb_premptysysset (sysentry); |
| 2358 | rsize = read (pi->status_fd, sysentry, size); |
| 2359 | if (rsize < 0) |
| 2360 | return NULL; |
| 2361 | } |
| 2362 | } |
| 2363 | #endif /* DYNAMIC_SYSCALLS */ |
| 2364 | #else /* !NEW_PROC_API */ |
| 2365 | { |
| 2366 | static sysset_t sysentry; |
| 2367 | |
| 2368 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
| 2369 | ret = &sysentry; |
| 2370 | } |
| 2371 | #endif /* NEW_PROC_API */ |
| 2372 | if (save && ret) |
| 2373 | memcpy (save, ret, sysset_t_size (pi)); |
| 2374 | |
| 2375 | return ret; |
| 2376 | } |
| 2377 | |
| 2378 | /* |
| 2379 | * Function: proc_get_traced_sysexit |
| 2380 | * |
| 2381 | * returns the set of syscalls that are traced /debugged on exit. |
| 2382 | * Will also copy the syscall set if 'save' is non-zero. |
| 2383 | */ |
| 2384 | |
| 2385 | sysset_t * |
| 2386 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
| 2387 | { |
| 2388 | sysset_t * ret = NULL; |
| 2389 | |
| 2390 | /* |
| 2391 | * We should never have to apply this operation to any procinfo |
| 2392 | * except the one for the main process. If that ever changes |
| 2393 | * for any reason, then take out the following clause and |
| 2394 | * replace it with one that makes sure the ctl_fd is open. |
| 2395 | */ |
| 2396 | |
| 2397 | if (pi->tid != 0) |
| 2398 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2399 | |
| 2400 | #ifdef NEW_PROC_API |
| 2401 | if (!pi->status_valid) |
| 2402 | if (!proc_get_status (pi)) |
| 2403 | return NULL; |
| 2404 | |
| 2405 | #ifndef DYNAMIC_SYSCALLS |
| 2406 | ret = &pi->prstatus.pr_sysexit; |
| 2407 | #else /* DYNAMIC_SYSCALLS */ |
| 2408 | { |
| 2409 | static sysset_t *sysexit; |
| 2410 | size_t size; |
| 2411 | |
| 2412 | if (!sysexit) |
| 2413 | sysexit = sysset_t_alloc (pi); |
| 2414 | ret = sysexit; |
| 2415 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) |
| 2416 | return NULL; |
| 2417 | if (pi->prstatus.pr_sysexit_offset == 0) |
| 2418 | { |
| 2419 | gdb_premptysysset (sysexit); |
| 2420 | } |
| 2421 | else |
| 2422 | { |
| 2423 | int rsize; |
| 2424 | |
| 2425 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) |
| 2426 | != (off_t) pi->prstatus.pr_sysexit_offset) |
| 2427 | return NULL; |
| 2428 | size = sysset_t_size (pi); |
| 2429 | gdb_premptysysset (sysexit); |
| 2430 | rsize = read (pi->status_fd, sysexit, size); |
| 2431 | if (rsize < 0) |
| 2432 | return NULL; |
| 2433 | } |
| 2434 | } |
| 2435 | #endif /* DYNAMIC_SYSCALLS */ |
| 2436 | #else |
| 2437 | { |
| 2438 | static sysset_t sysexit; |
| 2439 | |
| 2440 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
| 2441 | ret = &sysexit; |
| 2442 | } |
| 2443 | #endif |
| 2444 | if (save && ret) |
| 2445 | memcpy (save, ret, sysset_t_size (pi)); |
| 2446 | |
| 2447 | return ret; |
| 2448 | } |
| 2449 | |
| 2450 | /* |
| 2451 | * Function: proc_clear_current_fault |
| 2452 | * |
| 2453 | * The current fault (if any) is cleared; the associated signal |
| 2454 | * will not be sent to the process or LWP when it resumes. |
| 2455 | * Returns non-zero for success, zero for failure. |
| 2456 | */ |
| 2457 | |
| 2458 | int |
| 2459 | proc_clear_current_fault (procinfo *pi) |
| 2460 | { |
| 2461 | int win; |
| 2462 | |
| 2463 | /* |
| 2464 | * We should never have to apply this operation to any procinfo |
| 2465 | * except the one for the main process. If that ever changes |
| 2466 | * for any reason, then take out the following clause and |
| 2467 | * replace it with one that makes sure the ctl_fd is open. |
| 2468 | */ |
| 2469 | |
| 2470 | if (pi->tid != 0) |
| 2471 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2472 | |
| 2473 | #ifdef NEW_PROC_API |
| 2474 | { |
| 2475 | procfs_ctl_t cmd = PCCFAULT; |
| 2476 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 2477 | } |
| 2478 | #else |
| 2479 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); |
| 2480 | #endif |
| 2481 | |
| 2482 | return win; |
| 2483 | } |
| 2484 | |
| 2485 | /* |
| 2486 | * Function: proc_set_current_signal |
| 2487 | * |
| 2488 | * Set the "current signal" that will be delivered next to the process. |
| 2489 | * NOTE: semantics are different from those of KILL. |
| 2490 | * This signal will be delivered to the process or LWP |
| 2491 | * immediately when it is resumed (even if the signal is held/blocked); |
| 2492 | * it will NOT immediately cause another event of interest, and will NOT |
| 2493 | * first trap back to the debugger. |
| 2494 | * |
| 2495 | * Returns non-zero for success, zero for failure. |
| 2496 | */ |
| 2497 | |
| 2498 | int |
| 2499 | proc_set_current_signal (procinfo *pi, int signo) |
| 2500 | { |
| 2501 | int win; |
| 2502 | struct { |
| 2503 | procfs_ctl_t cmd; |
| 2504 | /* Use char array to avoid alignment issues. */ |
| 2505 | char sinfo[sizeof (gdb_siginfo_t)]; |
| 2506 | } arg; |
| 2507 | gdb_siginfo_t *mysinfo; |
| 2508 | ptid_t wait_ptid; |
| 2509 | struct target_waitstatus wait_status; |
| 2510 | |
| 2511 | /* |
| 2512 | * We should never have to apply this operation to any procinfo |
| 2513 | * except the one for the main process. If that ever changes |
| 2514 | * for any reason, then take out the following clause and |
| 2515 | * replace it with one that makes sure the ctl_fd is open. |
| 2516 | */ |
| 2517 | |
| 2518 | if (pi->tid != 0) |
| 2519 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2520 | |
| 2521 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
| 2522 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it |
| 2523 | * receives a PIOCSSIG with a signal identical to the current signal, |
| 2524 | * it messes up the current signal. Work around the kernel bug. |
| 2525 | */ |
| 2526 | if (signo > 0 && |
| 2527 | signo == proc_cursig (pi)) |
| 2528 | return 1; /* I assume this is a success? */ |
| 2529 | #endif |
| 2530 | |
| 2531 | /* The pointer is just a type alias. */ |
| 2532 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
| 2533 | get_last_target_status (&wait_ptid, &wait_status); |
| 2534 | if (ptid_equal (wait_ptid, inferior_ptid) |
| 2535 | && wait_status.kind == TARGET_WAITKIND_STOPPED |
| 2536 | && wait_status.value.sig == target_signal_from_host (signo) |
| 2537 | && proc_get_status (pi) |
| 2538 | #ifdef NEW_PROC_API |
| 2539 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
| 2540 | #else |
| 2541 | && pi->prstatus.pr_info.si_signo == signo |
| 2542 | #endif |
| 2543 | ) |
| 2544 | /* Use the siginfo associated with the signal being |
| 2545 | redelivered. */ |
| 2546 | #ifdef NEW_PROC_API |
| 2547 | memcpy (mysinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
| 2548 | #else |
| 2549 | memcpy (mysinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
| 2550 | #endif |
| 2551 | else |
| 2552 | { |
| 2553 | mysinfo->si_signo = signo; |
| 2554 | mysinfo->si_code = 0; |
| 2555 | mysinfo->si_pid = getpid (); /* ?why? */ |
| 2556 | mysinfo->si_uid = getuid (); /* ?why? */ |
| 2557 | } |
| 2558 | |
| 2559 | #ifdef NEW_PROC_API |
| 2560 | arg.cmd = PCSSIG; |
| 2561 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2562 | #else |
| 2563 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); |
| 2564 | #endif |
| 2565 | |
| 2566 | return win; |
| 2567 | } |
| 2568 | |
| 2569 | /* |
| 2570 | * Function: proc_clear_current_signal |
| 2571 | * |
| 2572 | * The current signal (if any) is cleared, and |
| 2573 | * is not sent to the process or LWP when it resumes. |
| 2574 | * Returns non-zero for success, zero for failure. |
| 2575 | */ |
| 2576 | |
| 2577 | int |
| 2578 | proc_clear_current_signal (procinfo *pi) |
| 2579 | { |
| 2580 | int win; |
| 2581 | |
| 2582 | /* |
| 2583 | * We should never have to apply this operation to any procinfo |
| 2584 | * except the one for the main process. If that ever changes |
| 2585 | * for any reason, then take out the following clause and |
| 2586 | * replace it with one that makes sure the ctl_fd is open. |
| 2587 | */ |
| 2588 | |
| 2589 | if (pi->tid != 0) |
| 2590 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2591 | |
| 2592 | #ifdef NEW_PROC_API |
| 2593 | { |
| 2594 | struct { |
| 2595 | procfs_ctl_t cmd; |
| 2596 | /* Use char array to avoid alignment issues. */ |
| 2597 | char sinfo[sizeof (gdb_siginfo_t)]; |
| 2598 | } arg; |
| 2599 | gdb_siginfo_t *mysinfo; |
| 2600 | |
| 2601 | arg.cmd = PCSSIG; |
| 2602 | /* The pointer is just a type alias. */ |
| 2603 | mysinfo = (gdb_siginfo_t *) &arg.sinfo; |
| 2604 | mysinfo->si_signo = 0; |
| 2605 | mysinfo->si_code = 0; |
| 2606 | mysinfo->si_errno = 0; |
| 2607 | mysinfo->si_pid = getpid (); /* ?why? */ |
| 2608 | mysinfo->si_uid = getuid (); /* ?why? */ |
| 2609 | |
| 2610 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2611 | } |
| 2612 | #else |
| 2613 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); |
| 2614 | #endif |
| 2615 | |
| 2616 | return win; |
| 2617 | } |
| 2618 | |
| 2619 | /* Return the general-purpose registers for the process or LWP |
| 2620 | corresponding to PI. Upon failure, return NULL. */ |
| 2621 | |
| 2622 | gdb_gregset_t * |
| 2623 | proc_get_gregs (procinfo *pi) |
| 2624 | { |
| 2625 | if (!pi->status_valid || !pi->gregs_valid) |
| 2626 | if (!proc_get_status (pi)) |
| 2627 | return NULL; |
| 2628 | |
| 2629 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
| 2630 | because in this case Unixware and Solaris/RW differ. */ |
| 2631 | |
| 2632 | #ifdef NEW_PROC_API |
| 2633 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
| 2634 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
| 2635 | # else |
| 2636 | return &pi->prstatus.pr_lwp.pr_reg; |
| 2637 | # endif |
| 2638 | #else |
| 2639 | return &pi->prstatus.pr_reg; |
| 2640 | #endif |
| 2641 | } |
| 2642 | |
| 2643 | /* Return the general-purpose registers for the process or LWP |
| 2644 | corresponding to PI. Upon failure, return NULL. */ |
| 2645 | |
| 2646 | gdb_fpregset_t * |
| 2647 | proc_get_fpregs (procinfo *pi) |
| 2648 | { |
| 2649 | #ifdef NEW_PROC_API |
| 2650 | if (!pi->status_valid || !pi->fpregs_valid) |
| 2651 | if (!proc_get_status (pi)) |
| 2652 | return NULL; |
| 2653 | |
| 2654 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
| 2655 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
| 2656 | # else |
| 2657 | return &pi->prstatus.pr_lwp.pr_fpreg; |
| 2658 | # endif |
| 2659 | |
| 2660 | #else /* not NEW_PROC_API */ |
| 2661 | if (pi->fpregs_valid) |
| 2662 | return &pi->fpregset; /* Already got 'em. */ |
| 2663 | else |
| 2664 | { |
| 2665 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
| 2666 | { |
| 2667 | return NULL; |
| 2668 | } |
| 2669 | else |
| 2670 | { |
| 2671 | # ifdef PIOCTGFPREG |
| 2672 | struct { |
| 2673 | long pr_count; |
| 2674 | tid_t pr_error_thread; |
| 2675 | tfpregset_t thread_1; |
| 2676 | } thread_fpregs; |
| 2677 | |
| 2678 | thread_fpregs.pr_count = 1; |
| 2679 | thread_fpregs.thread_1.tid = pi->tid; |
| 2680 | |
| 2681 | if (pi->tid == 0 |
| 2682 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
| 2683 | { |
| 2684 | pi->fpregs_valid = 1; |
| 2685 | return &pi->fpregset; /* Got 'em now! */ |
| 2686 | } |
| 2687 | else if (pi->tid != 0 |
| 2688 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) |
| 2689 | { |
| 2690 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, |
| 2691 | sizeof (pi->fpregset)); |
| 2692 | pi->fpregs_valid = 1; |
| 2693 | return &pi->fpregset; /* Got 'em now! */ |
| 2694 | } |
| 2695 | else |
| 2696 | { |
| 2697 | return NULL; |
| 2698 | } |
| 2699 | # else |
| 2700 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
| 2701 | { |
| 2702 | pi->fpregs_valid = 1; |
| 2703 | return &pi->fpregset; /* Got 'em now! */ |
| 2704 | } |
| 2705 | else |
| 2706 | { |
| 2707 | return NULL; |
| 2708 | } |
| 2709 | # endif |
| 2710 | } |
| 2711 | } |
| 2712 | #endif /* NEW_PROC_API */ |
| 2713 | } |
| 2714 | |
| 2715 | /* Write the general-purpose registers back to the process or LWP |
| 2716 | corresponding to PI. Return non-zero for success, zero for |
| 2717 | failure. */ |
| 2718 | |
| 2719 | int |
| 2720 | proc_set_gregs (procinfo *pi) |
| 2721 | { |
| 2722 | gdb_gregset_t *gregs; |
| 2723 | int win; |
| 2724 | |
| 2725 | gregs = proc_get_gregs (pi); |
| 2726 | if (gregs == NULL) |
| 2727 | return 0; /* proc_get_regs has already warned. */ |
| 2728 | |
| 2729 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
| 2730 | { |
| 2731 | return 0; |
| 2732 | } |
| 2733 | else |
| 2734 | { |
| 2735 | #ifdef NEW_PROC_API |
| 2736 | struct { |
| 2737 | procfs_ctl_t cmd; |
| 2738 | /* Use char array to avoid alignment issues. */ |
| 2739 | char gregs[sizeof (gdb_gregset_t)]; |
| 2740 | } arg; |
| 2741 | |
| 2742 | arg.cmd = PCSREG; |
| 2743 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
| 2744 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2745 | #else |
| 2746 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); |
| 2747 | #endif |
| 2748 | } |
| 2749 | |
| 2750 | /* Policy: writing the registers invalidates our cache. */ |
| 2751 | pi->gregs_valid = 0; |
| 2752 | return win; |
| 2753 | } |
| 2754 | |
| 2755 | /* Write the floating-pointer registers back to the process or LWP |
| 2756 | corresponding to PI. Return non-zero for success, zero for |
| 2757 | failure. */ |
| 2758 | |
| 2759 | int |
| 2760 | proc_set_fpregs (procinfo *pi) |
| 2761 | { |
| 2762 | gdb_fpregset_t *fpregs; |
| 2763 | int win; |
| 2764 | |
| 2765 | fpregs = proc_get_fpregs (pi); |
| 2766 | if (fpregs == NULL) |
| 2767 | return 0; /* proc_get_fpregs has already warned. */ |
| 2768 | |
| 2769 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
| 2770 | { |
| 2771 | return 0; |
| 2772 | } |
| 2773 | else |
| 2774 | { |
| 2775 | #ifdef NEW_PROC_API |
| 2776 | struct { |
| 2777 | procfs_ctl_t cmd; |
| 2778 | /* Use char array to avoid alignment issues. */ |
| 2779 | char fpregs[sizeof (gdb_fpregset_t)]; |
| 2780 | } arg; |
| 2781 | |
| 2782 | arg.cmd = PCSFPREG; |
| 2783 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
| 2784 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2785 | #else |
| 2786 | # ifdef PIOCTSFPREG |
| 2787 | if (pi->tid == 0) |
| 2788 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
| 2789 | else |
| 2790 | { |
| 2791 | struct { |
| 2792 | long pr_count; |
| 2793 | tid_t pr_error_thread; |
| 2794 | tfpregset_t thread_1; |
| 2795 | } thread_fpregs; |
| 2796 | |
| 2797 | thread_fpregs.pr_count = 1; |
| 2798 | thread_fpregs.thread_1.tid = pi->tid; |
| 2799 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, |
| 2800 | sizeof (*fpregs)); |
| 2801 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); |
| 2802 | } |
| 2803 | # else |
| 2804 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
| 2805 | # endif |
| 2806 | #endif /* NEW_PROC_API */ |
| 2807 | } |
| 2808 | |
| 2809 | /* Policy: writing the registers invalidates our cache. */ |
| 2810 | pi->fpregs_valid = 0; |
| 2811 | return win; |
| 2812 | } |
| 2813 | |
| 2814 | /* |
| 2815 | * Function: proc_kill |
| 2816 | * |
| 2817 | * Send a signal to the proc or lwp with the semantics of "kill()". |
| 2818 | * Returns non-zero for success, zero for failure. |
| 2819 | */ |
| 2820 | |
| 2821 | int |
| 2822 | proc_kill (procinfo *pi, int signo) |
| 2823 | { |
| 2824 | int win; |
| 2825 | |
| 2826 | /* |
| 2827 | * We might conceivably apply this operation to an LWP, and |
| 2828 | * the LWP's ctl file descriptor might not be open. |
| 2829 | */ |
| 2830 | |
| 2831 | if (pi->ctl_fd == 0 && |
| 2832 | open_procinfo_files (pi, FD_CTL) == 0) |
| 2833 | { |
| 2834 | return 0; |
| 2835 | } |
| 2836 | else |
| 2837 | { |
| 2838 | #ifdef NEW_PROC_API |
| 2839 | procfs_ctl_t cmd[2]; |
| 2840 | |
| 2841 | cmd[0] = PCKILL; |
| 2842 | cmd[1] = signo; |
| 2843 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 2844 | #else /* ioctl method */ |
| 2845 | /* FIXME: do I need the Alpha OSF fixups present in |
| 2846 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
| 2847 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
| 2848 | #endif |
| 2849 | } |
| 2850 | |
| 2851 | return win; |
| 2852 | } |
| 2853 | |
| 2854 | /* |
| 2855 | * Function: proc_parent_pid |
| 2856 | * |
| 2857 | * Find the pid of the process that started this one. |
| 2858 | * Returns the parent process pid, or zero. |
| 2859 | */ |
| 2860 | |
| 2861 | int |
| 2862 | proc_parent_pid (procinfo *pi) |
| 2863 | { |
| 2864 | /* |
| 2865 | * We should never have to apply this operation to any procinfo |
| 2866 | * except the one for the main process. If that ever changes |
| 2867 | * for any reason, then take out the following clause and |
| 2868 | * replace it with one that makes sure the ctl_fd is open. |
| 2869 | */ |
| 2870 | |
| 2871 | if (pi->tid != 0) |
| 2872 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2873 | |
| 2874 | if (!pi->status_valid) |
| 2875 | if (!proc_get_status (pi)) |
| 2876 | return 0; |
| 2877 | |
| 2878 | return pi->prstatus.pr_ppid; |
| 2879 | } |
| 2880 | |
| 2881 | |
| 2882 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
| 2883 | (a.k.a void pointer)! */ |
| 2884 | |
| 2885 | static void * |
| 2886 | procfs_address_to_host_pointer (CORE_ADDR addr) |
| 2887 | { |
| 2888 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
| 2889 | void *ptr; |
| 2890 | |
| 2891 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
| 2892 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
| 2893 | (gdb_byte *) &ptr, addr); |
| 2894 | return ptr; |
| 2895 | } |
| 2896 | |
| 2897 | /* |
| 2898 | * Function: proc_set_watchpoint |
| 2899 | * |
| 2900 | */ |
| 2901 | |
| 2902 | int |
| 2903 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
| 2904 | { |
| 2905 | #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS) |
| 2906 | return 0; |
| 2907 | #else |
| 2908 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ |
| 2909 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ |
| 2910 | return 0; |
| 2911 | #else |
| 2912 | struct { |
| 2913 | procfs_ctl_t cmd; |
| 2914 | char watch[sizeof (prwatch_t)]; |
| 2915 | } arg; |
| 2916 | prwatch_t *pwatch; |
| 2917 | |
| 2918 | pwatch = (prwatch_t *) &arg.watch; |
| 2919 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
| 2920 | convert a target address into something that can be stored in a |
| 2921 | native data structure. */ |
| 2922 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
| 2923 | pwatch->pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
| 2924 | #else |
| 2925 | pwatch->pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
| 2926 | #endif |
| 2927 | pwatch->pr_size = len; |
| 2928 | pwatch->pr_wflags = wflags; |
| 2929 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
| 2930 | arg.cmd = PCWATCH; |
| 2931 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
| 2932 | #else |
| 2933 | #if defined (PIOCSWATCH) |
| 2934 | return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0); |
| 2935 | #else |
| 2936 | return 0; /* Fail */ |
| 2937 | #endif |
| 2938 | #endif |
| 2939 | #endif |
| 2940 | #endif |
| 2941 | } |
| 2942 | |
| 2943 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
| 2944 | |
| 2945 | #include <sys/sysi86.h> |
| 2946 | |
| 2947 | /* |
| 2948 | * Function: proc_get_LDT_entry |
| 2949 | * |
| 2950 | * Inputs: |
| 2951 | * procinfo *pi; |
| 2952 | * int key; |
| 2953 | * |
| 2954 | * The 'key' is actually the value of the lower 16 bits of |
| 2955 | * the GS register for the LWP that we're interested in. |
| 2956 | * |
| 2957 | * Return: matching ssh struct (LDT entry). |
| 2958 | */ |
| 2959 | |
| 2960 | struct ssd * |
| 2961 | proc_get_LDT_entry (procinfo *pi, int key) |
| 2962 | { |
| 2963 | static struct ssd *ldt_entry = NULL; |
| 2964 | #ifdef NEW_PROC_API |
| 2965 | char pathname[MAX_PROC_NAME_SIZE]; |
| 2966 | struct cleanup *old_chain = NULL; |
| 2967 | int fd; |
| 2968 | |
| 2969 | /* Allocate space for one LDT entry. |
| 2970 | This alloc must persist, because we return a pointer to it. */ |
| 2971 | if (ldt_entry == NULL) |
| 2972 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); |
| 2973 | |
| 2974 | /* Open the file descriptor for the LDT table. */ |
| 2975 | sprintf (pathname, "/proc/%d/ldt", pi->pid); |
| 2976 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
| 2977 | { |
| 2978 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
| 2979 | return NULL; |
| 2980 | } |
| 2981 | /* Make sure it gets closed again! */ |
| 2982 | old_chain = make_cleanup_close (fd); |
| 2983 | |
| 2984 | /* Now 'read' thru the table, find a match and return it. */ |
| 2985 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) |
| 2986 | { |
| 2987 | if (ldt_entry->sel == 0 && |
| 2988 | ldt_entry->bo == 0 && |
| 2989 | ldt_entry->acc1 == 0 && |
| 2990 | ldt_entry->acc2 == 0) |
| 2991 | break; /* end of table */ |
| 2992 | /* If key matches, return this entry. */ |
| 2993 | if (ldt_entry->sel == key) |
| 2994 | return ldt_entry; |
| 2995 | } |
| 2996 | /* Loop ended, match not found. */ |
| 2997 | return NULL; |
| 2998 | #else |
| 2999 | int nldt, i; |
| 3000 | static int nalloc = 0; |
| 3001 | |
| 3002 | /* Get the number of LDT entries. */ |
| 3003 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) |
| 3004 | { |
| 3005 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
| 3006 | return NULL; |
| 3007 | } |
| 3008 | |
| 3009 | /* Allocate space for the number of LDT entries. */ |
| 3010 | /* This alloc has to persist, 'cause we return a pointer to it. */ |
| 3011 | if (nldt > nalloc) |
| 3012 | { |
| 3013 | ldt_entry = (struct ssd *) |
| 3014 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
| 3015 | nalloc = nldt; |
| 3016 | } |
| 3017 | |
| 3018 | /* Read the whole table in one gulp. */ |
| 3019 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) |
| 3020 | { |
| 3021 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); |
| 3022 | return NULL; |
| 3023 | } |
| 3024 | |
| 3025 | /* Search the table and return the (first) entry matching 'key'. */ |
| 3026 | for (i = 0; i < nldt; i++) |
| 3027 | if (ldt_entry[i].sel == key) |
| 3028 | return &ldt_entry[i]; |
| 3029 | |
| 3030 | /* Loop ended, match not found. */ |
| 3031 | return NULL; |
| 3032 | #endif |
| 3033 | } |
| 3034 | |
| 3035 | /* |
| 3036 | * Function: procfs_find_LDT_entry |
| 3037 | * |
| 3038 | * Input: |
| 3039 | * ptid_t ptid; // The GDB-style pid-plus-LWP. |
| 3040 | * |
| 3041 | * Return: |
| 3042 | * pointer to the corresponding LDT entry. |
| 3043 | */ |
| 3044 | |
| 3045 | struct ssd * |
| 3046 | procfs_find_LDT_entry (ptid_t ptid) |
| 3047 | { |
| 3048 | gdb_gregset_t *gregs; |
| 3049 | int key; |
| 3050 | procinfo *pi; |
| 3051 | |
| 3052 | /* Find procinfo for the lwp. */ |
| 3053 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) |
| 3054 | { |
| 3055 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
| 3056 | PIDGET (ptid), TIDGET (ptid)); |
| 3057 | return NULL; |
| 3058 | } |
| 3059 | /* get its general registers. */ |
| 3060 | if ((gregs = proc_get_gregs (pi)) == NULL) |
| 3061 | { |
| 3062 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
| 3063 | PIDGET (ptid), TIDGET (ptid)); |
| 3064 | return NULL; |
| 3065 | } |
| 3066 | /* Now extract the GS register's lower 16 bits. */ |
| 3067 | key = (*gregs)[GS] & 0xffff; |
| 3068 | |
| 3069 | /* Find the matching entry and return it. */ |
| 3070 | return proc_get_LDT_entry (pi, key); |
| 3071 | } |
| 3072 | |
| 3073 | #endif |
| 3074 | |
| 3075 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
| 3076 | |
| 3077 | /* =================== Thread "MODULE" =================== */ |
| 3078 | |
| 3079 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
| 3080 | since there is a different way to do threads on every OS. */ |
| 3081 | |
| 3082 | /* |
| 3083 | * Function: proc_get_nthreads |
| 3084 | * |
| 3085 | * Return the number of threads for the process |
| 3086 | */ |
| 3087 | |
| 3088 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
| 3089 | /* |
| 3090 | * OSF version |
| 3091 | */ |
| 3092 | int |
| 3093 | proc_get_nthreads (procinfo *pi) |
| 3094 | { |
| 3095 | int nthreads = 0; |
| 3096 | |
| 3097 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
| 3098 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); |
| 3099 | |
| 3100 | return nthreads; |
| 3101 | } |
| 3102 | |
| 3103 | #else |
| 3104 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ |
| 3105 | /* |
| 3106 | * Solaris and Unixware version |
| 3107 | */ |
| 3108 | int |
| 3109 | proc_get_nthreads (procinfo *pi) |
| 3110 | { |
| 3111 | if (!pi->status_valid) |
| 3112 | if (!proc_get_status (pi)) |
| 3113 | return 0; |
| 3114 | |
| 3115 | /* |
| 3116 | * NEW_PROC_API: only works for the process procinfo, |
| 3117 | * because the LWP procinfos do not get prstatus filled in. |
| 3118 | */ |
| 3119 | #ifdef NEW_PROC_API |
| 3120 | if (pi->tid != 0) /* find the parent process procinfo */ |
| 3121 | pi = find_procinfo_or_die (pi->pid, 0); |
| 3122 | #endif |
| 3123 | return pi->prstatus.pr_nlwp; |
| 3124 | } |
| 3125 | |
| 3126 | #else |
| 3127 | /* |
| 3128 | * Default version |
| 3129 | */ |
| 3130 | int |
| 3131 | proc_get_nthreads (procinfo *pi) |
| 3132 | { |
| 3133 | return 0; |
| 3134 | } |
| 3135 | #endif |
| 3136 | #endif |
| 3137 | |
| 3138 | /* |
| 3139 | * Function: proc_get_current_thread (LWP version) |
| 3140 | * |
| 3141 | * Return the ID of the thread that had an event of interest. |
| 3142 | * (ie. the one that hit a breakpoint or other traced event). |
| 3143 | * All other things being equal, this should be the ID of a |
| 3144 | * thread that is currently executing. |
| 3145 | */ |
| 3146 | |
| 3147 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ |
| 3148 | /* |
| 3149 | * Solaris and Unixware version |
| 3150 | */ |
| 3151 | int |
| 3152 | proc_get_current_thread (procinfo *pi) |
| 3153 | { |
| 3154 | /* |
| 3155 | * Note: this should be applied to the root procinfo for the process, |
| 3156 | * not to the procinfo for an LWP. If applied to the procinfo for |
| 3157 | * an LWP, it will simply return that LWP's ID. In that case, |
| 3158 | * find the parent process procinfo. |
| 3159 | */ |
| 3160 | |
| 3161 | if (pi->tid != 0) |
| 3162 | pi = find_procinfo_or_die (pi->pid, 0); |
| 3163 | |
| 3164 | if (!pi->status_valid) |
| 3165 | if (!proc_get_status (pi)) |
| 3166 | return 0; |
| 3167 | |
| 3168 | #ifdef NEW_PROC_API |
| 3169 | return pi->prstatus.pr_lwp.pr_lwpid; |
| 3170 | #else |
| 3171 | return pi->prstatus.pr_who; |
| 3172 | #endif |
| 3173 | } |
| 3174 | |
| 3175 | #else |
| 3176 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
| 3177 | /* |
| 3178 | * OSF version |
| 3179 | */ |
| 3180 | int |
| 3181 | proc_get_current_thread (procinfo *pi) |
| 3182 | { |
| 3183 | #if 0 /* FIXME: not ready for prime time? */ |
| 3184 | return pi->prstatus.pr_tid; |
| 3185 | #else |
| 3186 | return 0; |
| 3187 | #endif |
| 3188 | } |
| 3189 | |
| 3190 | #else |
| 3191 | /* |
| 3192 | * Default version |
| 3193 | */ |
| 3194 | int |
| 3195 | proc_get_current_thread (procinfo *pi) |
| 3196 | { |
| 3197 | return 0; |
| 3198 | } |
| 3199 | |
| 3200 | #endif |
| 3201 | #endif |
| 3202 | |
| 3203 | /* |
| 3204 | * Function: proc_update_threads |
| 3205 | * |
| 3206 | * Discover the IDs of all the threads within the process, and |
| 3207 | * create a procinfo for each of them (chained to the parent). |
| 3208 | * |
| 3209 | * This unfortunately requires a different method on every OS. |
| 3210 | * |
| 3211 | * Return: non-zero for success, zero for failure. |
| 3212 | */ |
| 3213 | |
| 3214 | int |
| 3215 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
| 3216 | { |
| 3217 | if (thread && parent) /* sanity */ |
| 3218 | { |
| 3219 | thread->status_valid = 0; |
| 3220 | if (!proc_get_status (thread)) |
| 3221 | destroy_one_procinfo (&parent->thread_list, thread); |
| 3222 | } |
| 3223 | return 0; /* keep iterating */ |
| 3224 | } |
| 3225 | |
| 3226 | #if defined (PIOCLSTATUS) |
| 3227 | /* |
| 3228 | * Solaris 2.5 (ioctl) version |
| 3229 | */ |
| 3230 | int |
| 3231 | proc_update_threads (procinfo *pi) |
| 3232 | { |
| 3233 | gdb_prstatus_t *prstatus; |
| 3234 | struct cleanup *old_chain = NULL; |
| 3235 | procinfo *thread; |
| 3236 | int nlwp, i; |
| 3237 | |
| 3238 | /* |
| 3239 | * We should never have to apply this operation to any procinfo |
| 3240 | * except the one for the main process. If that ever changes |
| 3241 | * for any reason, then take out the following clause and |
| 3242 | * replace it with one that makes sure the ctl_fd is open. |
| 3243 | */ |
| 3244 | |
| 3245 | if (pi->tid != 0) |
| 3246 | pi = find_procinfo_or_die (pi->pid, 0); |
| 3247 | |
| 3248 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); |
| 3249 | |
| 3250 | if ((nlwp = proc_get_nthreads (pi)) <= 1) |
| 3251 | return 1; /* Process is not multi-threaded; nothing to do. */ |
| 3252 | |
| 3253 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
| 3254 | |
| 3255 | old_chain = make_cleanup (xfree, prstatus); |
| 3256 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
| 3257 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); |
| 3258 | |
| 3259 | /* Skip element zero, which represents the process as a whole. */ |
| 3260 | for (i = 1; i < nlwp + 1; i++) |
| 3261 | { |
| 3262 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) |
| 3263 | proc_error (pi, "update_threads, create_procinfo", __LINE__); |
| 3264 | |
| 3265 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
| 3266 | thread->status_valid = 1; |
| 3267 | } |
| 3268 | pi->threads_valid = 1; |
| 3269 | do_cleanups (old_chain); |
| 3270 | return 1; |
| 3271 | } |
| 3272 | #else |
| 3273 | #ifdef NEW_PROC_API |
| 3274 | /* |
| 3275 | * Unixware and Solaris 6 (and later) version |
| 3276 | */ |
| 3277 | static void |
| 3278 | do_closedir_cleanup (void *dir) |
| 3279 | { |
| 3280 | closedir (dir); |
| 3281 | } |
| 3282 | |
| 3283 | int |
| 3284 | proc_update_threads (procinfo *pi) |
| 3285 | { |
| 3286 | char pathname[MAX_PROC_NAME_SIZE + 16]; |
| 3287 | struct dirent *direntry; |
| 3288 | struct cleanup *old_chain = NULL; |
| 3289 | procinfo *thread; |
| 3290 | DIR *dirp; |
| 3291 | int lwpid; |
| 3292 | |
| 3293 | /* |
| 3294 | * We should never have to apply this operation to any procinfo |
| 3295 | * except the one for the main process. If that ever changes |
| 3296 | * for any reason, then take out the following clause and |
| 3297 | * replace it with one that makes sure the ctl_fd is open. |
| 3298 | */ |
| 3299 | |
| 3300 | if (pi->tid != 0) |
| 3301 | pi = find_procinfo_or_die (pi->pid, 0); |
| 3302 | |
| 3303 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); |
| 3304 | |
| 3305 | /* |
| 3306 | * Unixware |
| 3307 | * |
| 3308 | * Note: this brute-force method is the only way I know of |
| 3309 | * to accomplish this task on Unixware. This method will |
| 3310 | * also work on Solaris 2.6 and 2.7. There is a much simpler |
| 3311 | * and more elegant way to do this on Solaris, but the margins |
| 3312 | * of this manuscript are too small to write it here... ;-) |
| 3313 | */ |
| 3314 | |
| 3315 | strcpy (pathname, pi->pathname); |
| 3316 | strcat (pathname, "/lwp"); |
| 3317 | if ((dirp = opendir (pathname)) == NULL) |
| 3318 | proc_error (pi, "update_threads, opendir", __LINE__); |
| 3319 | |
| 3320 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
| 3321 | while ((direntry = readdir (dirp)) != NULL) |
| 3322 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ |
| 3323 | { |
| 3324 | lwpid = atoi (&direntry->d_name[0]); |
| 3325 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) |
| 3326 | proc_error (pi, "update_threads, create_procinfo", __LINE__); |
| 3327 | } |
| 3328 | pi->threads_valid = 1; |
| 3329 | do_cleanups (old_chain); |
| 3330 | return 1; |
| 3331 | } |
| 3332 | #else |
| 3333 | #ifdef PIOCTLIST |
| 3334 | /* |
| 3335 | * OSF version |
| 3336 | */ |
| 3337 | int |
| 3338 | proc_update_threads (procinfo *pi) |
| 3339 | { |
| 3340 | int nthreads, i; |
| 3341 | tid_t *threads; |
| 3342 | |
| 3343 | /* |
| 3344 | * We should never have to apply this operation to any procinfo |
| 3345 | * except the one for the main process. If that ever changes |
| 3346 | * for any reason, then take out the following clause and |
| 3347 | * replace it with one that makes sure the ctl_fd is open. |
| 3348 | */ |
| 3349 | |
| 3350 | if (pi->tid != 0) |
| 3351 | pi = find_procinfo_or_die (pi->pid, 0); |
| 3352 | |
| 3353 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); |
| 3354 | |
| 3355 | nthreads = proc_get_nthreads (pi); |
| 3356 | if (nthreads < 2) |
| 3357 | return 0; /* nothing to do for 1 or fewer threads */ |
| 3358 | |
| 3359 | threads = xmalloc (nthreads * sizeof (tid_t)); |
| 3360 | |
| 3361 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
| 3362 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); |
| 3363 | |
| 3364 | for (i = 0; i < nthreads; i++) |
| 3365 | { |
| 3366 | if (!find_procinfo (pi->pid, threads[i])) |
| 3367 | if (!create_procinfo (pi->pid, threads[i])) |
| 3368 | proc_error (pi, "update_threads, create_procinfo", __LINE__); |
| 3369 | } |
| 3370 | pi->threads_valid = 1; |
| 3371 | return 1; |
| 3372 | } |
| 3373 | #else |
| 3374 | /* |
| 3375 | * Default version |
| 3376 | */ |
| 3377 | int |
| 3378 | proc_update_threads (procinfo *pi) |
| 3379 | { |
| 3380 | return 0; |
| 3381 | } |
| 3382 | #endif /* OSF PIOCTLIST */ |
| 3383 | #endif /* NEW_PROC_API */ |
| 3384 | #endif /* SOL 2.5 PIOCLSTATUS */ |
| 3385 | |
| 3386 | /* |
| 3387 | * Function: proc_iterate_over_threads |
| 3388 | * |
| 3389 | * Description: |
| 3390 | * Given a pointer to a function, call that function once |
| 3391 | * for each lwp in the procinfo list, until the function |
| 3392 | * returns non-zero, in which event return the value |
| 3393 | * returned by the function. |
| 3394 | * |
| 3395 | * Note: this function does NOT call update_threads. |
| 3396 | * If you want to discover new threads first, you must |
| 3397 | * call that function explicitly. This function just makes |
| 3398 | * a quick pass over the currently-known procinfos. |
| 3399 | * |
| 3400 | * Arguments: |
| 3401 | * pi - parent process procinfo |
| 3402 | * func - per-thread function |
| 3403 | * ptr - opaque parameter for function. |
| 3404 | * |
| 3405 | * Return: |
| 3406 | * First non-zero return value from the callee, or zero. |
| 3407 | */ |
| 3408 | |
| 3409 | int |
| 3410 | proc_iterate_over_threads (procinfo *pi, |
| 3411 | int (*func) (procinfo *, procinfo *, void *), |
| 3412 | void *ptr) |
| 3413 | { |
| 3414 | procinfo *thread, *next; |
| 3415 | int retval = 0; |
| 3416 | |
| 3417 | /* |
| 3418 | * We should never have to apply this operation to any procinfo |
| 3419 | * except the one for the main process. If that ever changes |
| 3420 | * for any reason, then take out the following clause and |
| 3421 | * replace it with one that makes sure the ctl_fd is open. |
| 3422 | */ |
| 3423 | |
| 3424 | if (pi->tid != 0) |
| 3425 | pi = find_procinfo_or_die (pi->pid, 0); |
| 3426 | |
| 3427 | for (thread = pi->thread_list; thread != NULL; thread = next) |
| 3428 | { |
| 3429 | next = thread->next; /* in case thread is destroyed */ |
| 3430 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
| 3431 | break; |
| 3432 | } |
| 3433 | |
| 3434 | return retval; |
| 3435 | } |
| 3436 | |
| 3437 | /* =================== END, Thread "MODULE" =================== */ |
| 3438 | |
| 3439 | /* =================== END, /proc "MODULE" =================== */ |
| 3440 | |
| 3441 | /* =================== GDB "MODULE" =================== */ |
| 3442 | |
| 3443 | /* |
| 3444 | * Here are all of the gdb target vector functions and their friends. |
| 3445 | */ |
| 3446 | |
| 3447 | static ptid_t do_attach (ptid_t ptid); |
| 3448 | static void do_detach (int signo); |
| 3449 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
| 3450 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
| 3451 | int entry_or_exit, int mode, int from_tty); |
| 3452 | static int insert_dbx_link_breakpoint (procinfo *pi); |
| 3453 | static void remove_dbx_link_breakpoint (void); |
| 3454 | |
| 3455 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during |
| 3456 | the startup phase. The following two variables are used to record |
| 3457 | the address of the breakpoint, and the code that was replaced by |
| 3458 | a breakpoint. */ |
| 3459 | static int dbx_link_bpt_addr = 0; |
| 3460 | static void *dbx_link_bpt; |
| 3461 | |
| 3462 | /* |
| 3463 | * Function: procfs_debug_inferior |
| 3464 | * |
| 3465 | * Sets up the inferior to be debugged. |
| 3466 | * Registers to trace signals, hardware faults, and syscalls. |
| 3467 | * Note: does not set RLC flag: caller may want to customize that. |
| 3468 | * |
| 3469 | * Returns: zero for success (note! unlike most functions in this module) |
| 3470 | * On failure, returns the LINE NUMBER where it failed! |
| 3471 | */ |
| 3472 | |
| 3473 | static int |
| 3474 | procfs_debug_inferior (procinfo *pi) |
| 3475 | { |
| 3476 | fltset_t traced_faults; |
| 3477 | gdb_sigset_t traced_signals; |
| 3478 | sysset_t *traced_syscall_entries; |
| 3479 | sysset_t *traced_syscall_exits; |
| 3480 | int status; |
| 3481 | |
| 3482 | #ifdef PROCFS_DONT_TRACE_FAULTS |
| 3483 | /* On some systems (OSF), we don't trace hardware faults. |
| 3484 | Apparently it's enough that we catch them as signals. |
| 3485 | Wonder why we don't just do that in general? */ |
| 3486 | premptyset (&traced_faults); /* don't trace faults. */ |
| 3487 | #else |
| 3488 | /* Register to trace hardware faults in the child. */ |
| 3489 | prfillset (&traced_faults); /* trace all faults... */ |
| 3490 | prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
| 3491 | #endif |
| 3492 | if (!proc_set_traced_faults (pi, &traced_faults)) |
| 3493 | return __LINE__; |
| 3494 | |
| 3495 | /* Register to trace selected signals in the child. */ |
| 3496 | premptyset (&traced_signals); |
| 3497 | if (!register_gdb_signals (pi, &traced_signals)) |
| 3498 | return __LINE__; |
| 3499 | |
| 3500 | |
| 3501 | /* Register to trace the 'exit' system call (on entry). */ |
| 3502 | traced_syscall_entries = sysset_t_alloc (pi); |
| 3503 | gdb_premptysysset (traced_syscall_entries); |
| 3504 | #ifdef SYS_exit |
| 3505 | gdb_praddsysset (traced_syscall_entries, SYS_exit); |
| 3506 | #endif |
| 3507 | #ifdef SYS_lwpexit |
| 3508 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
| 3509 | #endif |
| 3510 | #ifdef SYS_lwp_exit |
| 3511 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
| 3512 | #endif |
| 3513 | #ifdef DYNAMIC_SYSCALLS |
| 3514 | { |
| 3515 | int callnum = find_syscall (pi, "_exit"); |
| 3516 | if (callnum >= 0) |
| 3517 | gdb_praddsysset (traced_syscall_entries, callnum); |
| 3518 | } |
| 3519 | #endif |
| 3520 | |
| 3521 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
| 3522 | xfree (traced_syscall_entries); |
| 3523 | if (!status) |
| 3524 | return __LINE__; |
| 3525 | |
| 3526 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
| 3527 | /* OSF method for tracing exec syscalls. Quoting: |
| 3528 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace |
| 3529 | exits from exec system calls because of the user level loader. */ |
| 3530 | /* FIXME: make nice and maybe move into an access function. */ |
| 3531 | { |
| 3532 | int prfs_flags; |
| 3533 | |
| 3534 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
| 3535 | return __LINE__; |
| 3536 | |
| 3537 | prfs_flags |= PRFS_STOPEXEC; |
| 3538 | |
| 3539 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
| 3540 | return __LINE__; |
| 3541 | } |
| 3542 | #else /* not PRFS_STOPEXEC */ |
| 3543 | /* Everyone else's (except OSF) method for tracing exec syscalls */ |
| 3544 | /* GW: Rationale... |
| 3545 | Not all systems with /proc have all the exec* syscalls with the same |
| 3546 | names. On the SGI, for example, there is no SYS_exec, but there |
| 3547 | *is* a SYS_execv. So, we try to account for that. */ |
| 3548 | |
| 3549 | traced_syscall_exits = sysset_t_alloc (pi); |
| 3550 | gdb_premptysysset (traced_syscall_exits); |
| 3551 | #ifdef SYS_exec |
| 3552 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
| 3553 | #endif |
| 3554 | #ifdef SYS_execve |
| 3555 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
| 3556 | #endif |
| 3557 | #ifdef SYS_execv |
| 3558 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
| 3559 | #endif |
| 3560 | |
| 3561 | #ifdef SYS_lwpcreate |
| 3562 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
| 3563 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); |
| 3564 | #endif |
| 3565 | |
| 3566 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
| 3567 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
| 3568 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); |
| 3569 | #endif |
| 3570 | |
| 3571 | #ifdef DYNAMIC_SYSCALLS |
| 3572 | { |
| 3573 | int callnum = find_syscall (pi, "execve"); |
| 3574 | if (callnum >= 0) |
| 3575 | gdb_praddsysset (traced_syscall_exits, callnum); |
| 3576 | callnum = find_syscall (pi, "ra_execve"); |
| 3577 | if (callnum >= 0) |
| 3578 | gdb_praddsysset (traced_syscall_exits, callnum); |
| 3579 | } |
| 3580 | #endif |
| 3581 | |
| 3582 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
| 3583 | xfree (traced_syscall_exits); |
| 3584 | if (!status) |
| 3585 | return __LINE__; |
| 3586 | |
| 3587 | #endif /* PRFS_STOPEXEC */ |
| 3588 | return 0; |
| 3589 | } |
| 3590 | |
| 3591 | static void |
| 3592 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
| 3593 | { |
| 3594 | char *exec_file; |
| 3595 | int pid; |
| 3596 | |
| 3597 | if (!args) |
| 3598 | error_no_arg (_("process-id to attach")); |
| 3599 | |
| 3600 | pid = atoi (args); |
| 3601 | if (pid == getpid ()) |
| 3602 | error (_("Attaching GDB to itself is not a good idea...")); |
| 3603 | |
| 3604 | if (from_tty) |
| 3605 | { |
| 3606 | exec_file = get_exec_file (0); |
| 3607 | |
| 3608 | if (exec_file) |
| 3609 | printf_filtered (_("Attaching to program `%s', %s\n"), |
| 3610 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
| 3611 | else |
| 3612 | printf_filtered (_("Attaching to %s\n"), |
| 3613 | target_pid_to_str (pid_to_ptid (pid))); |
| 3614 | |
| 3615 | fflush (stdout); |
| 3616 | } |
| 3617 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
| 3618 | push_target (ops); |
| 3619 | } |
| 3620 | |
| 3621 | static void |
| 3622 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
| 3623 | { |
| 3624 | int sig = 0; |
| 3625 | int pid = PIDGET (inferior_ptid); |
| 3626 | |
| 3627 | if (args) |
| 3628 | sig = atoi (args); |
| 3629 | |
| 3630 | if (from_tty) |
| 3631 | { |
| 3632 | char *exec_file; |
| 3633 | |
| 3634 | exec_file = get_exec_file (0); |
| 3635 | if (exec_file == NULL) |
| 3636 | exec_file = ""; |
| 3637 | |
| 3638 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
| 3639 | target_pid_to_str (pid_to_ptid (pid))); |
| 3640 | gdb_flush (gdb_stdout); |
| 3641 | } |
| 3642 | |
| 3643 | do_detach (sig); |
| 3644 | |
| 3645 | inferior_ptid = null_ptid; |
| 3646 | detach_inferior (pid); |
| 3647 | unpush_target (ops); |
| 3648 | } |
| 3649 | |
| 3650 | static ptid_t |
| 3651 | do_attach (ptid_t ptid) |
| 3652 | { |
| 3653 | procinfo *pi; |
| 3654 | struct inferior *inf; |
| 3655 | int fail; |
| 3656 | int lwpid; |
| 3657 | |
| 3658 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
| 3659 | perror (_("procfs: out of memory in 'attach'")); |
| 3660 | |
| 3661 | if (!open_procinfo_files (pi, FD_CTL)) |
| 3662 | { |
| 3663 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); |
| 3664 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
| 3665 | PIDGET (ptid)); |
| 3666 | dead_procinfo (pi, errmsg, NOKILL); |
| 3667 | } |
| 3668 | |
| 3669 | /* Stop the process (if it isn't already stopped). */ |
| 3670 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
| 3671 | { |
| 3672 | pi->was_stopped = 1; |
| 3673 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); |
| 3674 | } |
| 3675 | else |
| 3676 | { |
| 3677 | pi->was_stopped = 0; |
| 3678 | /* Set the process to run again when we close it. */ |
| 3679 | if (!proc_set_run_on_last_close (pi)) |
| 3680 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); |
| 3681 | |
| 3682 | /* Now stop the process. */ |
| 3683 | if (!proc_stop_process (pi)) |
| 3684 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); |
| 3685 | pi->ignore_next_sigstop = 1; |
| 3686 | } |
| 3687 | /* Save some of the /proc state to be restored if we detach. */ |
| 3688 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) |
| 3689 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); |
| 3690 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
| 3691 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); |
| 3692 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
| 3693 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
| 3694 | NOKILL); |
| 3695 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
| 3696 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
| 3697 | NOKILL); |
| 3698 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) |
| 3699 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); |
| 3700 | |
| 3701 | if ((fail = procfs_debug_inferior (pi)) != 0) |
| 3702 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); |
| 3703 | |
| 3704 | inf = add_inferior (pi->pid); |
| 3705 | /* Let GDB know that the inferior was attached. */ |
| 3706 | inf->attach_flag = 1; |
| 3707 | |
| 3708 | /* Create a procinfo for the current lwp. */ |
| 3709 | lwpid = proc_get_current_thread (pi); |
| 3710 | create_procinfo (pi->pid, lwpid); |
| 3711 | |
| 3712 | /* Add it to gdb's thread list. */ |
| 3713 | ptid = MERGEPID (pi->pid, lwpid); |
| 3714 | add_thread (ptid); |
| 3715 | |
| 3716 | return ptid; |
| 3717 | } |
| 3718 | |
| 3719 | static void |
| 3720 | do_detach (int signo) |
| 3721 | { |
| 3722 | procinfo *pi; |
| 3723 | |
| 3724 | /* Find procinfo for the main process */ |
| 3725 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
| 3726 | if (signo) |
| 3727 | if (!proc_set_current_signal (pi, signo)) |
| 3728 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); |
| 3729 | |
| 3730 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
| 3731 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); |
| 3732 | |
| 3733 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
| 3734 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); |
| 3735 | |
| 3736 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
| 3737 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
| 3738 | |
| 3739 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
| 3740 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
| 3741 | |
| 3742 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) |
| 3743 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); |
| 3744 | |
| 3745 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) |
| 3746 | if (signo || !(pi->was_stopped) || |
| 3747 | query (_("Was stopped when attached, make it runnable again? "))) |
| 3748 | { |
| 3749 | /* Clear any pending signal. */ |
| 3750 | if (!proc_clear_current_fault (pi)) |
| 3751 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); |
| 3752 | |
| 3753 | if (signo == 0 && !proc_clear_current_signal (pi)) |
| 3754 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
| 3755 | |
| 3756 | if (!proc_set_run_on_last_close (pi)) |
| 3757 | proc_warn (pi, "do_detach, set_rlc", __LINE__); |
| 3758 | } |
| 3759 | |
| 3760 | destroy_procinfo (pi); |
| 3761 | } |
| 3762 | |
| 3763 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| 3764 | for all registers. |
| 3765 | |
| 3766 | ??? Is the following note still relevant? We can't get individual |
| 3767 | registers with the PT_GETREGS ptrace(2) request either, yet we |
| 3768 | don't bother with caching at all in that case. |
| 3769 | |
| 3770 | NOTE: Since the /proc interface cannot give us individual |
| 3771 | registers, we pay no attention to REGNUM, and just fetch them all. |
| 3772 | This results in the possibility that we will do unnecessarily many |
| 3773 | fetches, since we may be called repeatedly for individual |
| 3774 | registers. So we cache the results, and mark the cache invalid |
| 3775 | when the process is resumed. */ |
| 3776 | |
| 3777 | static void |
| 3778 | procfs_fetch_registers (struct target_ops *ops, |
| 3779 | struct regcache *regcache, int regnum) |
| 3780 | { |
| 3781 | gdb_gregset_t *gregs; |
| 3782 | procinfo *pi; |
| 3783 | int pid = PIDGET (inferior_ptid); |
| 3784 | int tid = TIDGET (inferior_ptid); |
| 3785 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 3786 | |
| 3787 | pi = find_procinfo_or_die (pid, tid); |
| 3788 | |
| 3789 | if (pi == NULL) |
| 3790 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
| 3791 | target_pid_to_str (inferior_ptid)); |
| 3792 | |
| 3793 | gregs = proc_get_gregs (pi); |
| 3794 | if (gregs == NULL) |
| 3795 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
| 3796 | |
| 3797 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
| 3798 | |
| 3799 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
| 3800 | { |
| 3801 | gdb_fpregset_t *fpregs; |
| 3802 | |
| 3803 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
| 3804 | || regnum == gdbarch_pc_regnum (gdbarch) |
| 3805 | || regnum == gdbarch_sp_regnum (gdbarch)) |
| 3806 | return; /* Not a floating point register. */ |
| 3807 | |
| 3808 | fpregs = proc_get_fpregs (pi); |
| 3809 | if (fpregs == NULL) |
| 3810 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
| 3811 | |
| 3812 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
| 3813 | } |
| 3814 | } |
| 3815 | |
| 3816 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| 3817 | this for all registers. |
| 3818 | |
| 3819 | NOTE: Since the /proc interface will not read individual registers, |
| 3820 | we will cache these requests until the process is resumed, and only |
| 3821 | then write them back to the inferior process. |
| 3822 | |
| 3823 | FIXME: is that a really bad idea? Have to think about cases where |
| 3824 | writing one register might affect the value of others, etc. */ |
| 3825 | |
| 3826 | static void |
| 3827 | procfs_store_registers (struct target_ops *ops, |
| 3828 | struct regcache *regcache, int regnum) |
| 3829 | { |
| 3830 | gdb_gregset_t *gregs; |
| 3831 | procinfo *pi; |
| 3832 | int pid = PIDGET (inferior_ptid); |
| 3833 | int tid = TIDGET (inferior_ptid); |
| 3834 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 3835 | |
| 3836 | pi = find_procinfo_or_die (pid, tid); |
| 3837 | |
| 3838 | if (pi == NULL) |
| 3839 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
| 3840 | target_pid_to_str (inferior_ptid)); |
| 3841 | |
| 3842 | gregs = proc_get_gregs (pi); |
| 3843 | if (gregs == NULL) |
| 3844 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
| 3845 | |
| 3846 | fill_gregset (regcache, gregs, regnum); |
| 3847 | if (!proc_set_gregs (pi)) |
| 3848 | proc_error (pi, "store_registers, set_gregs", __LINE__); |
| 3849 | |
| 3850 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
| 3851 | { |
| 3852 | gdb_fpregset_t *fpregs; |
| 3853 | |
| 3854 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
| 3855 | || regnum == gdbarch_pc_regnum (gdbarch) |
| 3856 | || regnum == gdbarch_sp_regnum (gdbarch)) |
| 3857 | return; /* Not a floating point register. */ |
| 3858 | |
| 3859 | fpregs = proc_get_fpregs (pi); |
| 3860 | if (fpregs == NULL) |
| 3861 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
| 3862 | |
| 3863 | fill_fpregset (regcache, fpregs, regnum); |
| 3864 | if (!proc_set_fpregs (pi)) |
| 3865 | proc_error (pi, "store_registers, set_fpregs", __LINE__); |
| 3866 | } |
| 3867 | } |
| 3868 | |
| 3869 | static int |
| 3870 | syscall_is_lwp_exit (procinfo *pi, int scall) |
| 3871 | { |
| 3872 | |
| 3873 | #ifdef SYS_lwp_exit |
| 3874 | if (scall == SYS_lwp_exit) |
| 3875 | return 1; |
| 3876 | #endif |
| 3877 | #ifdef SYS_lwpexit |
| 3878 | if (scall == SYS_lwpexit) |
| 3879 | return 1; |
| 3880 | #endif |
| 3881 | return 0; |
| 3882 | } |
| 3883 | |
| 3884 | static int |
| 3885 | syscall_is_exit (procinfo *pi, int scall) |
| 3886 | { |
| 3887 | #ifdef SYS_exit |
| 3888 | if (scall == SYS_exit) |
| 3889 | return 1; |
| 3890 | #endif |
| 3891 | #ifdef DYNAMIC_SYSCALLS |
| 3892 | if (find_syscall (pi, "_exit") == scall) |
| 3893 | return 1; |
| 3894 | #endif |
| 3895 | return 0; |
| 3896 | } |
| 3897 | |
| 3898 | static int |
| 3899 | syscall_is_exec (procinfo *pi, int scall) |
| 3900 | { |
| 3901 | #ifdef SYS_exec |
| 3902 | if (scall == SYS_exec) |
| 3903 | return 1; |
| 3904 | #endif |
| 3905 | #ifdef SYS_execv |
| 3906 | if (scall == SYS_execv) |
| 3907 | return 1; |
| 3908 | #endif |
| 3909 | #ifdef SYS_execve |
| 3910 | if (scall == SYS_execve) |
| 3911 | return 1; |
| 3912 | #endif |
| 3913 | #ifdef DYNAMIC_SYSCALLS |
| 3914 | if (find_syscall (pi, "_execve")) |
| 3915 | return 1; |
| 3916 | if (find_syscall (pi, "ra_execve")) |
| 3917 | return 1; |
| 3918 | #endif |
| 3919 | return 0; |
| 3920 | } |
| 3921 | |
| 3922 | static int |
| 3923 | syscall_is_lwp_create (procinfo *pi, int scall) |
| 3924 | { |
| 3925 | #ifdef SYS_lwp_create |
| 3926 | if (scall == SYS_lwp_create) |
| 3927 | return 1; |
| 3928 | #endif |
| 3929 | #ifdef SYS_lwpcreate |
| 3930 | if (scall == SYS_lwpcreate) |
| 3931 | return 1; |
| 3932 | #endif |
| 3933 | return 0; |
| 3934 | } |
| 3935 | |
| 3936 | /* |
| 3937 | * Function: target_wait |
| 3938 | * |
| 3939 | * Retrieve the next stop event from the child process. |
| 3940 | * If child has not stopped yet, wait for it to stop. |
| 3941 | * Translate /proc eventcodes (or possibly wait eventcodes) |
| 3942 | * into gdb internal event codes. |
| 3943 | * |
| 3944 | * Return: id of process (and possibly thread) that incurred the event. |
| 3945 | * event codes are returned thru a pointer parameter. |
| 3946 | */ |
| 3947 | |
| 3948 | static ptid_t |
| 3949 | procfs_wait (struct target_ops *ops, |
| 3950 | ptid_t ptid, struct target_waitstatus *status) |
| 3951 | { |
| 3952 | /* First cut: loosely based on original version 2.1 */ |
| 3953 | procinfo *pi; |
| 3954 | int wstat; |
| 3955 | int temp_tid; |
| 3956 | ptid_t retval, temp_ptid; |
| 3957 | int why, what, flags; |
| 3958 | int retry = 0; |
| 3959 | |
| 3960 | wait_again: |
| 3961 | |
| 3962 | retry++; |
| 3963 | wstat = 0; |
| 3964 | retval = pid_to_ptid (-1); |
| 3965 | |
| 3966 | /* Find procinfo for main process */ |
| 3967 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
| 3968 | if (pi) |
| 3969 | { |
| 3970 | /* We must assume that the status is stale now... */ |
| 3971 | pi->status_valid = 0; |
| 3972 | pi->gregs_valid = 0; |
| 3973 | pi->fpregs_valid = 0; |
| 3974 | |
| 3975 | #if 0 /* just try this out... */ |
| 3976 | flags = proc_flags (pi); |
| 3977 | why = proc_why (pi); |
| 3978 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) |
| 3979 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
| 3980 | #endif |
| 3981 | /* If child is not stopped, wait for it to stop. */ |
| 3982 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && |
| 3983 | !proc_wait_for_stop (pi)) |
| 3984 | { |
| 3985 | /* wait_for_stop failed: has the child terminated? */ |
| 3986 | if (errno == ENOENT) |
| 3987 | { |
| 3988 | int wait_retval; |
| 3989 | |
| 3990 | /* /proc file not found; presumably child has terminated. */ |
| 3991 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
| 3992 | |
| 3993 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
| 3994 | error (_("procfs: couldn't stop process %d: wait returned %d."), |
| 3995 | PIDGET (inferior_ptid), wait_retval); |
| 3996 | /* FIXME: might I not just use waitpid? |
| 3997 | Or try find_procinfo to see if I know about this child? */ |
| 3998 | retval = pid_to_ptid (wait_retval); |
| 3999 | } |
| 4000 | else if (errno == EINTR) |
| 4001 | goto wait_again; |
| 4002 | else |
| 4003 | { |
| 4004 | /* Unknown error from wait_for_stop. */ |
| 4005 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
| 4006 | } |
| 4007 | } |
| 4008 | else |
| 4009 | { |
| 4010 | /* This long block is reached if either: |
| 4011 | a) the child was already stopped, or |
| 4012 | b) we successfully waited for the child with wait_for_stop. |
| 4013 | This block will analyze the /proc status, and translate it |
| 4014 | into a waitstatus for GDB. |
| 4015 | |
| 4016 | If we actually had to call wait because the /proc file |
| 4017 | is gone (child terminated), then we skip this block, |
| 4018 | because we already have a waitstatus. */ |
| 4019 | |
| 4020 | flags = proc_flags (pi); |
| 4021 | why = proc_why (pi); |
| 4022 | what = proc_what (pi); |
| 4023 | |
| 4024 | if (flags & (PR_STOPPED | PR_ISTOP)) |
| 4025 | { |
| 4026 | #ifdef PR_ASYNC |
| 4027 | /* If it's running async (for single_thread control), |
| 4028 | set it back to normal again. */ |
| 4029 | if (flags & PR_ASYNC) |
| 4030 | if (!proc_unset_async (pi)) |
| 4031 | proc_error (pi, "target_wait, unset_async", __LINE__); |
| 4032 | #endif |
| 4033 | |
| 4034 | if (info_verbose) |
| 4035 | proc_prettyprint_why (why, what, 1); |
| 4036 | |
| 4037 | /* The 'pid' we will return to GDB is composed of |
| 4038 | the process ID plus the lwp ID. */ |
| 4039 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); |
| 4040 | |
| 4041 | switch (why) { |
| 4042 | case PR_SIGNALLED: |
| 4043 | wstat = (what << 8) | 0177; |
| 4044 | break; |
| 4045 | case PR_SYSENTRY: |
| 4046 | if (syscall_is_lwp_exit (pi, what)) |
| 4047 | { |
| 4048 | if (print_thread_events) |
| 4049 | printf_unfiltered (_("[%s exited]\n"), |
| 4050 | target_pid_to_str (retval)); |
| 4051 | delete_thread (retval); |
| 4052 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 4053 | return retval; |
| 4054 | } |
| 4055 | else if (syscall_is_exit (pi, what)) |
| 4056 | { |
| 4057 | struct inferior *inf; |
| 4058 | |
| 4059 | /* Handle SYS_exit call only */ |
| 4060 | /* Stopped at entry to SYS_exit. |
| 4061 | Make it runnable, resume it, then use |
| 4062 | the wait system call to get its exit code. |
| 4063 | Proc_run_process always clears the current |
| 4064 | fault and signal. |
| 4065 | Then return its exit status. */ |
| 4066 | pi->status_valid = 0; |
| 4067 | wstat = 0; |
| 4068 | /* FIXME: what we should do is return |
| 4069 | TARGET_WAITKIND_SPURIOUS. */ |
| 4070 | if (!proc_run_process (pi, 0, 0)) |
| 4071 | proc_error (pi, "target_wait, run_process", __LINE__); |
| 4072 | |
| 4073 | inf = find_inferior_pid (pi->pid); |
| 4074 | if (inf->attach_flag) |
| 4075 | { |
| 4076 | /* Don't call wait: simulate waiting for exit, |
| 4077 | return a "success" exit code. Bogus: what if |
| 4078 | it returns something else? */ |
| 4079 | wstat = 0; |
| 4080 | retval = inferior_ptid; /* ? ? ? */ |
| 4081 | } |
| 4082 | else |
| 4083 | { |
| 4084 | int temp = wait (&wstat); |
| 4085 | |
| 4086 | /* FIXME: shouldn't I make sure I get the right |
| 4087 | event from the right process? If (for |
| 4088 | instance) I have killed an earlier inferior |
| 4089 | process but failed to clean up after it |
| 4090 | somehow, I could get its termination event |
| 4091 | here. */ |
| 4092 | |
| 4093 | /* If wait returns -1, that's what we return to GDB. */ |
| 4094 | if (temp < 0) |
| 4095 | retval = pid_to_ptid (temp); |
| 4096 | } |
| 4097 | } |
| 4098 | else |
| 4099 | { |
| 4100 | printf_filtered (_("procfs: trapped on entry to ")); |
| 4101 | proc_prettyprint_syscall (proc_what (pi), 0); |
| 4102 | printf_filtered ("\n"); |
| 4103 | #ifndef PIOCSSPCACT |
| 4104 | { |
| 4105 | long i, nsysargs, *sysargs; |
| 4106 | |
| 4107 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
| 4108 | (sysargs = proc_sysargs (pi)) != NULL) |
| 4109 | { |
| 4110 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
| 4111 | for (i = 0; i < nsysargs; i++) |
| 4112 | printf_filtered ("#%ld: 0x%08lx\n", |
| 4113 | i, sysargs[i]); |
| 4114 | } |
| 4115 | |
| 4116 | } |
| 4117 | #endif |
| 4118 | if (status) |
| 4119 | { |
| 4120 | /* How to exit gracefully, returning "unknown event" */ |
| 4121 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 4122 | return inferior_ptid; |
| 4123 | } |
| 4124 | else |
| 4125 | { |
| 4126 | /* How to keep going without returning to wfi: */ |
| 4127 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
| 4128 | goto wait_again; |
| 4129 | } |
| 4130 | } |
| 4131 | break; |
| 4132 | case PR_SYSEXIT: |
| 4133 | if (syscall_is_exec (pi, what)) |
| 4134 | { |
| 4135 | /* Hopefully this is our own "fork-child" execing |
| 4136 | the real child. Hoax this event into a trap, and |
| 4137 | GDB will see the child about to execute its start |
| 4138 | address. */ |
| 4139 | wstat = (SIGTRAP << 8) | 0177; |
| 4140 | } |
| 4141 | #ifdef SYS_syssgi |
| 4142 | else if (what == SYS_syssgi) |
| 4143 | { |
| 4144 | /* see if we can break on dbx_link(). If yes, then |
| 4145 | we no longer need the SYS_syssgi notifications. */ |
| 4146 | if (insert_dbx_link_breakpoint (pi)) |
| 4147 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, |
| 4148 | FLAG_RESET, 0); |
| 4149 | |
| 4150 | /* This is an internal event and should be transparent |
| 4151 | to wfi, so resume the execution and wait again. See |
| 4152 | comment in procfs_init_inferior() for more details. */ |
| 4153 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
| 4154 | goto wait_again; |
| 4155 | } |
| 4156 | #endif |
| 4157 | else if (syscall_is_lwp_create (pi, what)) |
| 4158 | { |
| 4159 | /* |
| 4160 | * This syscall is somewhat like fork/exec. |
| 4161 | * We will get the event twice: once for the parent LWP, |
| 4162 | * and once for the child. We should already know about |
| 4163 | * the parent LWP, but the child will be new to us. So, |
| 4164 | * whenever we get this event, if it represents a new |
| 4165 | * thread, simply add the thread to the list. |
| 4166 | */ |
| 4167 | |
| 4168 | /* If not in procinfo list, add it. */ |
| 4169 | temp_tid = proc_get_current_thread (pi); |
| 4170 | if (!find_procinfo (pi->pid, temp_tid)) |
| 4171 | create_procinfo (pi->pid, temp_tid); |
| 4172 | |
| 4173 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
| 4174 | /* If not in GDB's thread list, add it. */ |
| 4175 | if (!in_thread_list (temp_ptid)) |
| 4176 | add_thread (temp_ptid); |
| 4177 | |
| 4178 | /* Return to WFI, but tell it to immediately resume. */ |
| 4179 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 4180 | return inferior_ptid; |
| 4181 | } |
| 4182 | else if (syscall_is_lwp_exit (pi, what)) |
| 4183 | { |
| 4184 | if (print_thread_events) |
| 4185 | printf_unfiltered (_("[%s exited]\n"), |
| 4186 | target_pid_to_str (retval)); |
| 4187 | delete_thread (retval); |
| 4188 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 4189 | return retval; |
| 4190 | } |
| 4191 | else if (0) |
| 4192 | { |
| 4193 | /* FIXME: Do we need to handle SYS_sproc, |
| 4194 | SYS_fork, or SYS_vfork here? The old procfs |
| 4195 | seemed to use this event to handle threads on |
| 4196 | older (non-LWP) systems, where I'm assuming |
| 4197 | that threads were actually separate processes. |
| 4198 | Irix, maybe? Anyway, low priority for now. */ |
| 4199 | } |
| 4200 | else |
| 4201 | { |
| 4202 | printf_filtered (_("procfs: trapped on exit from ")); |
| 4203 | proc_prettyprint_syscall (proc_what (pi), 0); |
| 4204 | printf_filtered ("\n"); |
| 4205 | #ifndef PIOCSSPCACT |
| 4206 | { |
| 4207 | long i, nsysargs, *sysargs; |
| 4208 | |
| 4209 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
| 4210 | (sysargs = proc_sysargs (pi)) != NULL) |
| 4211 | { |
| 4212 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
| 4213 | for (i = 0; i < nsysargs; i++) |
| 4214 | printf_filtered ("#%ld: 0x%08lx\n", |
| 4215 | i, sysargs[i]); |
| 4216 | } |
| 4217 | } |
| 4218 | #endif |
| 4219 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 4220 | return inferior_ptid; |
| 4221 | } |
| 4222 | break; |
| 4223 | case PR_REQUESTED: |
| 4224 | #if 0 /* FIXME */ |
| 4225 | wstat = (SIGSTOP << 8) | 0177; |
| 4226 | break; |
| 4227 | #else |
| 4228 | if (retry < 5) |
| 4229 | { |
| 4230 | printf_filtered (_("Retry #%d:\n"), retry); |
| 4231 | pi->status_valid = 0; |
| 4232 | goto wait_again; |
| 4233 | } |
| 4234 | else |
| 4235 | { |
| 4236 | /* If not in procinfo list, add it. */ |
| 4237 | temp_tid = proc_get_current_thread (pi); |
| 4238 | if (!find_procinfo (pi->pid, temp_tid)) |
| 4239 | create_procinfo (pi->pid, temp_tid); |
| 4240 | |
| 4241 | /* If not in GDB's thread list, add it. */ |
| 4242 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
| 4243 | if (!in_thread_list (temp_ptid)) |
| 4244 | add_thread (temp_ptid); |
| 4245 | |
| 4246 | status->kind = TARGET_WAITKIND_STOPPED; |
| 4247 | status->value.sig = 0; |
| 4248 | return retval; |
| 4249 | } |
| 4250 | #endif |
| 4251 | case PR_JOBCONTROL: |
| 4252 | wstat = (what << 8) | 0177; |
| 4253 | break; |
| 4254 | case PR_FAULTED: |
| 4255 | switch (what) { |
| 4256 | #ifdef FLTWATCH |
| 4257 | case FLTWATCH: |
| 4258 | wstat = (SIGTRAP << 8) | 0177; |
| 4259 | break; |
| 4260 | #endif |
| 4261 | #ifdef FLTKWATCH |
| 4262 | case FLTKWATCH: |
| 4263 | wstat = (SIGTRAP << 8) | 0177; |
| 4264 | break; |
| 4265 | #endif |
| 4266 | /* FIXME: use si_signo where possible. */ |
| 4267 | case FLTPRIV: |
| 4268 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ |
| 4269 | case FLTILL: |
| 4270 | #endif |
| 4271 | wstat = (SIGILL << 8) | 0177; |
| 4272 | break; |
| 4273 | case FLTBPT: |
| 4274 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ |
| 4275 | case FLTTRACE: |
| 4276 | #endif |
| 4277 | /* If we hit our __dbx_link() internal breakpoint, |
| 4278 | then remove it. See comments in procfs_init_inferior() |
| 4279 | for more details. */ |
| 4280 | if (dbx_link_bpt_addr != 0 |
| 4281 | && dbx_link_bpt_addr == read_pc ()) |
| 4282 | remove_dbx_link_breakpoint (); |
| 4283 | |
| 4284 | wstat = (SIGTRAP << 8) | 0177; |
| 4285 | break; |
| 4286 | case FLTSTACK: |
| 4287 | case FLTACCESS: |
| 4288 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ |
| 4289 | case FLTBOUNDS: |
| 4290 | #endif |
| 4291 | wstat = (SIGSEGV << 8) | 0177; |
| 4292 | break; |
| 4293 | case FLTIOVF: |
| 4294 | case FLTIZDIV: |
| 4295 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ |
| 4296 | case FLTFPE: |
| 4297 | #endif |
| 4298 | wstat = (SIGFPE << 8) | 0177; |
| 4299 | break; |
| 4300 | case FLTPAGE: /* Recoverable page fault */ |
| 4301 | default: /* FIXME: use si_signo if possible for fault */ |
| 4302 | retval = pid_to_ptid (-1); |
| 4303 | printf_filtered ("procfs:%d -- ", __LINE__); |
| 4304 | printf_filtered (_("child stopped for unknown reason:\n")); |
| 4305 | proc_prettyprint_why (why, what, 1); |
| 4306 | error (_("... giving up...")); |
| 4307 | break; |
| 4308 | } |
| 4309 | break; /* case PR_FAULTED: */ |
| 4310 | default: /* switch (why) unmatched */ |
| 4311 | printf_filtered ("procfs:%d -- ", __LINE__); |
| 4312 | printf_filtered (_("child stopped for unknown reason:\n")); |
| 4313 | proc_prettyprint_why (why, what, 1); |
| 4314 | error (_("... giving up...")); |
| 4315 | break; |
| 4316 | } |
| 4317 | /* |
| 4318 | * Got this far without error: |
| 4319 | * If retval isn't in the threads database, add it. |
| 4320 | */ |
| 4321 | if (PIDGET (retval) > 0 && |
| 4322 | !ptid_equal (retval, inferior_ptid) && |
| 4323 | !in_thread_list (retval)) |
| 4324 | { |
| 4325 | /* |
| 4326 | * We have a new thread. |
| 4327 | * We need to add it both to GDB's list and to our own. |
| 4328 | * If we don't create a procinfo, resume may be unhappy |
| 4329 | * later. |
| 4330 | */ |
| 4331 | add_thread (retval); |
| 4332 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) |
| 4333 | create_procinfo (PIDGET (retval), TIDGET (retval)); |
| 4334 | } |
| 4335 | } |
| 4336 | else /* flags do not indicate STOPPED */ |
| 4337 | { |
| 4338 | /* surely this can't happen... */ |
| 4339 | printf_filtered ("procfs:%d -- process not stopped.\n", |
| 4340 | __LINE__); |
| 4341 | proc_prettyprint_flags (flags, 1); |
| 4342 | error (_("procfs: ...giving up...")); |
| 4343 | } |
| 4344 | } |
| 4345 | |
| 4346 | if (status) |
| 4347 | store_waitstatus (status, wstat); |
| 4348 | } |
| 4349 | |
| 4350 | return retval; |
| 4351 | } |
| 4352 | |
| 4353 | /* Perform a partial transfer to/from the specified object. For |
| 4354 | memory transfers, fall back to the old memory xfer functions. */ |
| 4355 | |
| 4356 | static LONGEST |
| 4357 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
| 4358 | const char *annex, gdb_byte *readbuf, |
| 4359 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) |
| 4360 | { |
| 4361 | switch (object) |
| 4362 | { |
| 4363 | case TARGET_OBJECT_MEMORY: |
| 4364 | if (readbuf) |
| 4365 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
| 4366 | len, 0/*read*/, NULL, ops); |
| 4367 | if (writebuf) |
| 4368 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
| 4369 | len, 1/*write*/, NULL, ops); |
| 4370 | return -1; |
| 4371 | |
| 4372 | #ifdef NEW_PROC_API |
| 4373 | case TARGET_OBJECT_AUXV: |
| 4374 | return procfs_xfer_auxv (ops, object, annex, readbuf, writebuf, |
| 4375 | offset, len); |
| 4376 | #endif |
| 4377 | |
| 4378 | default: |
| 4379 | if (ops->beneath != NULL) |
| 4380 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
| 4381 | readbuf, writebuf, offset, len); |
| 4382 | return -1; |
| 4383 | } |
| 4384 | } |
| 4385 | |
| 4386 | |
| 4387 | /* Transfer LEN bytes between GDB address MYADDR and target address |
| 4388 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, |
| 4389 | otherwise transfer them from the target. TARGET is unused. |
| 4390 | |
| 4391 | The return value is 0 if an error occurred or no bytes were |
| 4392 | transferred. Otherwise, it will be a positive value which |
| 4393 | indicates the number of bytes transferred between gdb and the |
| 4394 | target. (Note that the interface also makes provisions for |
| 4395 | negative values, but this capability isn't implemented here.) */ |
| 4396 | |
| 4397 | static int |
| 4398 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
| 4399 | struct mem_attrib *attrib, struct target_ops *target) |
| 4400 | { |
| 4401 | procinfo *pi; |
| 4402 | int nbytes = 0; |
| 4403 | |
| 4404 | /* Find procinfo for main process */ |
| 4405 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
| 4406 | if (pi->as_fd == 0 && |
| 4407 | open_procinfo_files (pi, FD_AS) == 0) |
| 4408 | { |
| 4409 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
| 4410 | return 0; |
| 4411 | } |
| 4412 | |
| 4413 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
| 4414 | { |
| 4415 | if (dowrite) |
| 4416 | { |
| 4417 | #ifdef NEW_PROC_API |
| 4418 | PROCFS_NOTE ("write memory: "); |
| 4419 | #else |
| 4420 | PROCFS_NOTE ("write memory: \n"); |
| 4421 | #endif |
| 4422 | nbytes = write (pi->as_fd, myaddr, len); |
| 4423 | } |
| 4424 | else |
| 4425 | { |
| 4426 | PROCFS_NOTE ("read memory: \n"); |
| 4427 | nbytes = read (pi->as_fd, myaddr, len); |
| 4428 | } |
| 4429 | if (nbytes < 0) |
| 4430 | { |
| 4431 | nbytes = 0; |
| 4432 | } |
| 4433 | } |
| 4434 | return nbytes; |
| 4435 | } |
| 4436 | |
| 4437 | /* |
| 4438 | * Function: invalidate_cache |
| 4439 | * |
| 4440 | * Called by target_resume before making child runnable. |
| 4441 | * Mark cached registers and status's invalid. |
| 4442 | * If there are "dirty" caches that need to be written back |
| 4443 | * to the child process, do that. |
| 4444 | * |
| 4445 | * File descriptors are also cached. |
| 4446 | * As they are a limited resource, we cannot hold onto them indefinitely. |
| 4447 | * However, as they are expensive to open, we don't want to throw them |
| 4448 | * away indescriminately either. As a compromise, we will keep the |
| 4449 | * file descriptors for the parent process, but discard any file |
| 4450 | * descriptors we may have accumulated for the threads. |
| 4451 | * |
| 4452 | * Return value: |
| 4453 | * As this function is called by iterate_over_threads, it always |
| 4454 | * returns zero (so that iterate_over_threads will keep iterating). |
| 4455 | */ |
| 4456 | |
| 4457 | |
| 4458 | static int |
| 4459 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
| 4460 | { |
| 4461 | /* |
| 4462 | * About to run the child; invalidate caches and do any other cleanup. |
| 4463 | */ |
| 4464 | |
| 4465 | #if 0 |
| 4466 | if (pi->gregs_dirty) |
| 4467 | if (parent == NULL || |
| 4468 | proc_get_current_thread (parent) != pi->tid) |
| 4469 | if (!proc_set_gregs (pi)) /* flush gregs cache */ |
| 4470 | proc_warn (pi, "target_resume, set_gregs", |
| 4471 | __LINE__); |
| 4472 | if (gdbarch_fp0_regnum (current_gdbarch) >= 0) |
| 4473 | if (pi->fpregs_dirty) |
| 4474 | if (parent == NULL || |
| 4475 | proc_get_current_thread (parent) != pi->tid) |
| 4476 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ |
| 4477 | proc_warn (pi, "target_resume, set_fpregs", |
| 4478 | __LINE__); |
| 4479 | #endif |
| 4480 | |
| 4481 | if (parent != NULL) |
| 4482 | { |
| 4483 | /* The presence of a parent indicates that this is an LWP. |
| 4484 | Close any file descriptors that it might have open. |
| 4485 | We don't do this to the master (parent) procinfo. */ |
| 4486 | |
| 4487 | close_procinfo_files (pi); |
| 4488 | } |
| 4489 | pi->gregs_valid = 0; |
| 4490 | pi->fpregs_valid = 0; |
| 4491 | #if 0 |
| 4492 | pi->gregs_dirty = 0; |
| 4493 | pi->fpregs_dirty = 0; |
| 4494 | #endif |
| 4495 | pi->status_valid = 0; |
| 4496 | pi->threads_valid = 0; |
| 4497 | |
| 4498 | return 0; |
| 4499 | } |
| 4500 | |
| 4501 | #if 0 |
| 4502 | /* |
| 4503 | * Function: make_signal_thread_runnable |
| 4504 | * |
| 4505 | * A callback function for iterate_over_threads. |
| 4506 | * Find the asynchronous signal thread, and make it runnable. |
| 4507 | * See if that helps matters any. |
| 4508 | */ |
| 4509 | |
| 4510 | static int |
| 4511 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
| 4512 | { |
| 4513 | #ifdef PR_ASLWP |
| 4514 | if (proc_flags (pi) & PR_ASLWP) |
| 4515 | { |
| 4516 | if (!proc_run_process (pi, 0, -1)) |
| 4517 | proc_error (pi, "make_signal_thread_runnable", __LINE__); |
| 4518 | return 1; |
| 4519 | } |
| 4520 | #endif |
| 4521 | return 0; |
| 4522 | } |
| 4523 | #endif |
| 4524 | |
| 4525 | /* |
| 4526 | * Function: target_resume |
| 4527 | * |
| 4528 | * Make the child process runnable. Normally we will then call |
| 4529 | * procfs_wait and wait for it to stop again (unles gdb is async). |
| 4530 | * |
| 4531 | * Arguments: |
| 4532 | * step: if true, then arrange for the child to stop again |
| 4533 | * after executing a single instruction. |
| 4534 | * signo: if zero, then cancel any pending signal. |
| 4535 | * If non-zero, then arrange for the indicated signal |
| 4536 | * to be delivered to the child when it runs. |
| 4537 | * pid: if -1, then allow any child thread to run. |
| 4538 | * if non-zero, then allow only the indicated thread to run. |
| 4539 | ******* (not implemented yet) |
| 4540 | */ |
| 4541 | |
| 4542 | static void |
| 4543 | procfs_resume (struct target_ops *ops, |
| 4544 | ptid_t ptid, int step, enum target_signal signo) |
| 4545 | { |
| 4546 | procinfo *pi, *thread; |
| 4547 | int native_signo; |
| 4548 | |
| 4549 | /* 2.1: |
| 4550 | prrun.prflags |= PRSVADDR; |
| 4551 | prrun.pr_vaddr = $PC; set resume address |
| 4552 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
| 4553 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
| 4554 | prrun.prflags |= PRCFAULT; clear current fault. |
| 4555 | |
| 4556 | PRSTRACE and PRSFAULT can be done by other means |
| 4557 | (proc_trace_signals, proc_trace_faults) |
| 4558 | PRSVADDR is unnecessary. |
| 4559 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) |
| 4560 | This basically leaves PRSTEP and PRCSIG. |
| 4561 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). |
| 4562 | So basically PR_STEP is the sole argument that must be passed |
| 4563 | to proc_run_process (for use in the prrun struct by ioctl). */ |
| 4564 | |
| 4565 | /* Find procinfo for main process */ |
| 4566 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
| 4567 | |
| 4568 | /* First cut: ignore pid argument */ |
| 4569 | errno = 0; |
| 4570 | |
| 4571 | /* Convert signal to host numbering. */ |
| 4572 | if (signo == 0 || |
| 4573 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
| 4574 | native_signo = 0; |
| 4575 | else |
| 4576 | native_signo = target_signal_to_host (signo); |
| 4577 | |
| 4578 | pi->ignore_next_sigstop = 0; |
| 4579 | |
| 4580 | /* Running the process voids all cached registers and status. */ |
| 4581 | /* Void the threads' caches first */ |
| 4582 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
| 4583 | /* Void the process procinfo's caches. */ |
| 4584 | invalidate_cache (NULL, pi, NULL); |
| 4585 | |
| 4586 | if (PIDGET (ptid) != -1) |
| 4587 | { |
| 4588 | /* Resume a specific thread, presumably suppressing the others. */ |
| 4589 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
| 4590 | if (thread != NULL) |
| 4591 | { |
| 4592 | if (thread->tid != 0) |
| 4593 | { |
| 4594 | /* We're to resume a specific thread, and not the others. |
| 4595 | * Set the child process's PR_ASYNC flag. |
| 4596 | */ |
| 4597 | #ifdef PR_ASYNC |
| 4598 | if (!proc_set_async (pi)) |
| 4599 | proc_error (pi, "target_resume, set_async", __LINE__); |
| 4600 | #endif |
| 4601 | #if 0 |
| 4602 | proc_iterate_over_threads (pi, |
| 4603 | make_signal_thread_runnable, |
| 4604 | NULL); |
| 4605 | #endif |
| 4606 | pi = thread; /* substitute the thread's procinfo for run */ |
| 4607 | } |
| 4608 | } |
| 4609 | } |
| 4610 | |
| 4611 | if (!proc_run_process (pi, step, native_signo)) |
| 4612 | { |
| 4613 | if (errno == EBUSY) |
| 4614 | warning (_("resume: target already running. Pretend to resume, and hope for the best!")); |
| 4615 | else |
| 4616 | proc_error (pi, "target_resume", __LINE__); |
| 4617 | } |
| 4618 | } |
| 4619 | |
| 4620 | /* |
| 4621 | * Function: register_gdb_signals |
| 4622 | * |
| 4623 | * Traverse the list of signals that GDB knows about |
| 4624 | * (see "handle" command), and arrange for the target |
| 4625 | * to be stopped or not, according to these settings. |
| 4626 | * |
| 4627 | * Returns non-zero for success, zero for failure. |
| 4628 | */ |
| 4629 | |
| 4630 | static int |
| 4631 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
| 4632 | { |
| 4633 | int signo; |
| 4634 | |
| 4635 | for (signo = 0; signo < NSIG; signo ++) |
| 4636 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && |
| 4637 | signal_print_state (target_signal_from_host (signo)) == 0 && |
| 4638 | signal_pass_state (target_signal_from_host (signo)) == 1) |
| 4639 | prdelset (signals, signo); |
| 4640 | else |
| 4641 | praddset (signals, signo); |
| 4642 | |
| 4643 | return proc_set_traced_signals (pi, signals); |
| 4644 | } |
| 4645 | |
| 4646 | /* |
| 4647 | * Function: target_notice_signals |
| 4648 | * |
| 4649 | * Set up to trace signals in the child process. |
| 4650 | */ |
| 4651 | |
| 4652 | static void |
| 4653 | procfs_notice_signals (ptid_t ptid) |
| 4654 | { |
| 4655 | gdb_sigset_t signals; |
| 4656 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
| 4657 | |
| 4658 | if (proc_get_traced_signals (pi, &signals) && |
| 4659 | register_gdb_signals (pi, &signals)) |
| 4660 | return; |
| 4661 | else |
| 4662 | proc_error (pi, "notice_signals", __LINE__); |
| 4663 | } |
| 4664 | |
| 4665 | /* |
| 4666 | * Function: target_files_info |
| 4667 | * |
| 4668 | * Print status information about the child process. |
| 4669 | */ |
| 4670 | |
| 4671 | static void |
| 4672 | procfs_files_info (struct target_ops *ignore) |
| 4673 | { |
| 4674 | struct inferior *inf = current_inferior (); |
| 4675 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
| 4676 | inf->attach_flag? "attached": "child", |
| 4677 | target_pid_to_str (inferior_ptid)); |
| 4678 | } |
| 4679 | |
| 4680 | /* |
| 4681 | * Function: target_stop |
| 4682 | * |
| 4683 | * Stop the child process asynchronously, as when the |
| 4684 | * gdb user types control-c or presses a "stop" button. |
| 4685 | * |
| 4686 | * Works by sending kill(SIGINT) to the child's process group. |
| 4687 | */ |
| 4688 | |
| 4689 | static void |
| 4690 | procfs_stop (ptid_t ptid) |
| 4691 | { |
| 4692 | kill (-inferior_process_group, SIGINT); |
| 4693 | } |
| 4694 | |
| 4695 | /* |
| 4696 | * Function: unconditionally_kill_inferior |
| 4697 | * |
| 4698 | * Make it die. Wait for it to die. Clean up after it. |
| 4699 | * Note: this should only be applied to the real process, |
| 4700 | * not to an LWP, because of the check for parent-process. |
| 4701 | * If we need this to work for an LWP, it needs some more logic. |
| 4702 | */ |
| 4703 | |
| 4704 | static void |
| 4705 | unconditionally_kill_inferior (procinfo *pi) |
| 4706 | { |
| 4707 | int parent_pid; |
| 4708 | |
| 4709 | parent_pid = proc_parent_pid (pi); |
| 4710 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL |
| 4711 | /* FIXME: use access functions */ |
| 4712 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal |
| 4713 | before the PIOCKILL, otherwise it might generate a corrupted core |
| 4714 | file for the inferior. */ |
| 4715 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) |
| 4716 | { |
| 4717 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); |
| 4718 | } |
| 4719 | #endif |
| 4720 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL |
| 4721 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal |
| 4722 | to kill the inferior, otherwise it might remain stopped with a |
| 4723 | pending SIGKILL. |
| 4724 | We do not check the result of the PIOCSSIG, the inferior might have |
| 4725 | died already. */ |
| 4726 | { |
| 4727 | gdb_siginfo_t newsiginfo; |
| 4728 | |
| 4729 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
| 4730 | newsiginfo.si_signo = SIGKILL; |
| 4731 | newsiginfo.si_code = 0; |
| 4732 | newsiginfo.si_errno = 0; |
| 4733 | newsiginfo.si_pid = getpid (); |
| 4734 | newsiginfo.si_uid = getuid (); |
| 4735 | /* FIXME: use proc_set_current_signal */ |
| 4736 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
| 4737 | } |
| 4738 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
| 4739 | if (!proc_kill (pi, SIGKILL)) |
| 4740 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
| 4741 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
| 4742 | destroy_procinfo (pi); |
| 4743 | |
| 4744 | /* If pi is GDB's child, wait for it to die. */ |
| 4745 | if (parent_pid == getpid ()) |
| 4746 | /* FIXME: should we use waitpid to make sure we get the right event? |
| 4747 | Should we check the returned event? */ |
| 4748 | { |
| 4749 | #if 0 |
| 4750 | int status, ret; |
| 4751 | |
| 4752 | ret = waitpid (pi->pid, &status, 0); |
| 4753 | #else |
| 4754 | wait (NULL); |
| 4755 | #endif |
| 4756 | } |
| 4757 | } |
| 4758 | |
| 4759 | /* |
| 4760 | * Function: target_kill_inferior |
| 4761 | * |
| 4762 | * We're done debugging it, and we want it to go away. |
| 4763 | * Then we want GDB to forget all about it. |
| 4764 | */ |
| 4765 | |
| 4766 | static void |
| 4767 | procfs_kill_inferior (void) |
| 4768 | { |
| 4769 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
| 4770 | { |
| 4771 | /* Find procinfo for main process */ |
| 4772 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
| 4773 | |
| 4774 | if (pi) |
| 4775 | unconditionally_kill_inferior (pi); |
| 4776 | target_mourn_inferior (); |
| 4777 | } |
| 4778 | } |
| 4779 | |
| 4780 | /* |
| 4781 | * Function: target_mourn_inferior |
| 4782 | * |
| 4783 | * Forget we ever debugged this thing! |
| 4784 | */ |
| 4785 | |
| 4786 | static void |
| 4787 | procfs_mourn_inferior (struct target_ops *ops) |
| 4788 | { |
| 4789 | procinfo *pi; |
| 4790 | |
| 4791 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 4792 | { |
| 4793 | /* Find procinfo for main process */ |
| 4794 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
| 4795 | if (pi) |
| 4796 | destroy_procinfo (pi); |
| 4797 | } |
| 4798 | unpush_target (ops); |
| 4799 | |
| 4800 | if (dbx_link_bpt != NULL) |
| 4801 | { |
| 4802 | deprecated_remove_raw_breakpoint (dbx_link_bpt); |
| 4803 | dbx_link_bpt_addr = 0; |
| 4804 | dbx_link_bpt = NULL; |
| 4805 | } |
| 4806 | |
| 4807 | generic_mourn_inferior (); |
| 4808 | } |
| 4809 | |
| 4810 | /* |
| 4811 | * Function: init_inferior |
| 4812 | * |
| 4813 | * When GDB forks to create a runnable inferior process, |
| 4814 | * this function is called on the parent side of the fork. |
| 4815 | * It's job is to do whatever is necessary to make the child |
| 4816 | * ready to be debugged, and then wait for the child to synchronize. |
| 4817 | */ |
| 4818 | |
| 4819 | static void |
| 4820 | procfs_init_inferior (struct target_ops *ops, int pid) |
| 4821 | { |
| 4822 | procinfo *pi; |
| 4823 | gdb_sigset_t signals; |
| 4824 | int fail; |
| 4825 | int lwpid; |
| 4826 | |
| 4827 | /* This routine called on the parent side (GDB side) |
| 4828 | after GDB forks the inferior. */ |
| 4829 | push_target (ops); |
| 4830 | |
| 4831 | if ((pi = create_procinfo (pid, 0)) == NULL) |
| 4832 | perror ("procfs: out of memory in 'init_inferior'"); |
| 4833 | |
| 4834 | if (!open_procinfo_files (pi, FD_CTL)) |
| 4835 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); |
| 4836 | |
| 4837 | /* |
| 4838 | xmalloc // done |
| 4839 | open_procinfo_files // done |
| 4840 | link list // done |
| 4841 | prfillset (trace) |
| 4842 | procfs_notice_signals |
| 4843 | prfillset (fault) |
| 4844 | prdelset (FLTPAGE) |
| 4845 | PIOCWSTOP |
| 4846 | PIOCSFAULT |
| 4847 | */ |
| 4848 | |
| 4849 | /* If not stopped yet, wait for it to stop. */ |
| 4850 | if (!(proc_flags (pi) & PR_STOPPED) && |
| 4851 | !(proc_wait_for_stop (pi))) |
| 4852 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); |
| 4853 | |
| 4854 | /* Save some of the /proc state to be restored if we detach. */ |
| 4855 | /* FIXME: Why? In case another debugger was debugging it? |
| 4856 | We're it's parent, for Ghu's sake! */ |
| 4857 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
| 4858 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); |
| 4859 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) |
| 4860 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); |
| 4861 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) |
| 4862 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); |
| 4863 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
| 4864 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
| 4865 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
| 4866 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
| 4867 | |
| 4868 | /* Register to trace selected signals in the child. */ |
| 4869 | prfillset (&signals); |
| 4870 | if (!register_gdb_signals (pi, &signals)) |
| 4871 | proc_error (pi, "init_inferior, register_signals", __LINE__); |
| 4872 | |
| 4873 | if ((fail = procfs_debug_inferior (pi)) != 0) |
| 4874 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); |
| 4875 | |
| 4876 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
| 4877 | and possibly even turning ON kill-on-last-close at this point. But |
| 4878 | I can't make that change without careful testing which I don't have |
| 4879 | time to do right now... */ |
| 4880 | /* Turn on run-on-last-close flag so that the child |
| 4881 | will die if GDB goes away for some reason. */ |
| 4882 | if (!proc_set_run_on_last_close (pi)) |
| 4883 | proc_error (pi, "init_inferior, set_RLC", __LINE__); |
| 4884 | |
| 4885 | /* We now have have access to the lwpid of the main thread/lwp. */ |
| 4886 | lwpid = proc_get_current_thread (pi); |
| 4887 | |
| 4888 | /* Create a procinfo for the main lwp. */ |
| 4889 | create_procinfo (pid, lwpid); |
| 4890 | |
| 4891 | /* We already have a main thread registered in the thread table at |
| 4892 | this point, but it didn't have any lwp info yet. Notify the core |
| 4893 | about it. This changes inferior_ptid as well. */ |
| 4894 | thread_change_ptid (pid_to_ptid (pid), |
| 4895 | MERGEPID (pid, lwpid)); |
| 4896 | |
| 4897 | /* Typically two, one trap to exec the shell, one to exec the |
| 4898 | program being debugged. Defined by "inferior.h". */ |
| 4899 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
| 4900 | |
| 4901 | #ifdef SYS_syssgi |
| 4902 | /* On mips-irix, we need to stop the inferior early enough during |
| 4903 | the startup phase in order to be able to load the shared library |
| 4904 | symbols and insert the breakpoints that are located in these shared |
| 4905 | libraries. Stopping at the program entry point is not good enough |
| 4906 | because the -init code is executed before the execution reaches |
| 4907 | that point. |
| 4908 | |
| 4909 | So what we need to do is to insert a breakpoint in the runtime |
| 4910 | loader (rld), more precisely in __dbx_link(). This procedure is |
| 4911 | called by rld once all shared libraries have been mapped, but before |
| 4912 | the -init code is executed. Unfortuantely, this is not straightforward, |
| 4913 | as rld is not part of the executable we are running, and thus we need |
| 4914 | the inferior to run until rld itself has been mapped in memory. |
| 4915 | |
| 4916 | For this, we trace all syssgi() syscall exit events. Each time |
| 4917 | we detect such an event, we iterate over each text memory maps, |
| 4918 | get its associated fd, and scan the symbol table for __dbx_link(). |
| 4919 | When found, we know that rld has been mapped, and that we can insert |
| 4920 | the breakpoint at the symbol address. Once the dbx_link() breakpoint |
| 4921 | has been inserted, the syssgi() notifications are no longer necessary, |
| 4922 | so they should be canceled. */ |
| 4923 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); |
| 4924 | #endif |
| 4925 | } |
| 4926 | |
| 4927 | /* |
| 4928 | * Function: set_exec_trap |
| 4929 | * |
| 4930 | * When GDB forks to create a new process, this function is called |
| 4931 | * on the child side of the fork before GDB exec's the user program. |
| 4932 | * Its job is to make the child minimally debuggable, so that the |
| 4933 | * parent GDB process can connect to the child and take over. |
| 4934 | * This function should do only the minimum to make that possible, |
| 4935 | * and to synchronize with the parent process. The parent process |
| 4936 | * should take care of the details. |
| 4937 | */ |
| 4938 | |
| 4939 | static void |
| 4940 | procfs_set_exec_trap (void) |
| 4941 | { |
| 4942 | /* This routine called on the child side (inferior side) |
| 4943 | after GDB forks the inferior. It must use only local variables, |
| 4944 | because it may be sharing data space with its parent. */ |
| 4945 | |
| 4946 | procinfo *pi; |
| 4947 | sysset_t *exitset; |
| 4948 | |
| 4949 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
| 4950 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
| 4951 | |
| 4952 | if (open_procinfo_files (pi, FD_CTL) == 0) |
| 4953 | { |
| 4954 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); |
| 4955 | gdb_flush (gdb_stderr); |
| 4956 | /* no need to call "dead_procinfo", because we're going to exit. */ |
| 4957 | _exit (127); |
| 4958 | } |
| 4959 | |
| 4960 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
| 4961 | /* OSF method for tracing exec syscalls. Quoting: |
| 4962 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace |
| 4963 | exits from exec system calls because of the user level loader. */ |
| 4964 | /* FIXME: make nice and maybe move into an access function. */ |
| 4965 | { |
| 4966 | int prfs_flags; |
| 4967 | |
| 4968 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
| 4969 | { |
| 4970 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); |
| 4971 | gdb_flush (gdb_stderr); |
| 4972 | _exit (127); |
| 4973 | } |
| 4974 | prfs_flags |= PRFS_STOPEXEC; |
| 4975 | |
| 4976 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
| 4977 | { |
| 4978 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); |
| 4979 | gdb_flush (gdb_stderr); |
| 4980 | _exit (127); |
| 4981 | } |
| 4982 | } |
| 4983 | #else /* not PRFS_STOPEXEC */ |
| 4984 | /* Everyone else's (except OSF) method for tracing exec syscalls */ |
| 4985 | /* GW: Rationale... |
| 4986 | Not all systems with /proc have all the exec* syscalls with the same |
| 4987 | names. On the SGI, for example, there is no SYS_exec, but there |
| 4988 | *is* a SYS_execv. So, we try to account for that. */ |
| 4989 | |
| 4990 | exitset = sysset_t_alloc (pi); |
| 4991 | gdb_premptysysset (exitset); |
| 4992 | #ifdef SYS_exec |
| 4993 | gdb_praddsysset (exitset, SYS_exec); |
| 4994 | #endif |
| 4995 | #ifdef SYS_execve |
| 4996 | gdb_praddsysset (exitset, SYS_execve); |
| 4997 | #endif |
| 4998 | #ifdef SYS_execv |
| 4999 | gdb_praddsysset (exitset, SYS_execv); |
| 5000 | #endif |
| 5001 | #ifdef DYNAMIC_SYSCALLS |
| 5002 | { |
| 5003 | int callnum = find_syscall (pi, "execve"); |
| 5004 | |
| 5005 | if (callnum >= 0) |
| 5006 | gdb_praddsysset (exitset, callnum); |
| 5007 | |
| 5008 | callnum = find_syscall (pi, "ra_execve"); |
| 5009 | if (callnum >= 0) |
| 5010 | gdb_praddsysset (exitset, callnum); |
| 5011 | } |
| 5012 | #endif /* DYNAMIC_SYSCALLS */ |
| 5013 | |
| 5014 | if (!proc_set_traced_sysexit (pi, exitset)) |
| 5015 | { |
| 5016 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
| 5017 | gdb_flush (gdb_stderr); |
| 5018 | _exit (127); |
| 5019 | } |
| 5020 | #endif /* PRFS_STOPEXEC */ |
| 5021 | |
| 5022 | /* FIXME: should this be done in the parent instead? */ |
| 5023 | /* Turn off inherit on fork flag so that all grand-children |
| 5024 | of gdb start with tracing flags cleared. */ |
| 5025 | if (!proc_unset_inherit_on_fork (pi)) |
| 5026 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); |
| 5027 | |
| 5028 | /* Turn off run on last close flag, so that the child process |
| 5029 | cannot run away just because we close our handle on it. |
| 5030 | We want it to wait for the parent to attach. */ |
| 5031 | if (!proc_unset_run_on_last_close (pi)) |
| 5032 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); |
| 5033 | |
| 5034 | /* FIXME: No need to destroy the procinfo -- |
| 5035 | we have our own address space, and we're about to do an exec! */ |
| 5036 | /*destroy_procinfo (pi);*/ |
| 5037 | } |
| 5038 | |
| 5039 | /* |
| 5040 | * Function: create_inferior |
| 5041 | * |
| 5042 | * This function is called BEFORE gdb forks the inferior process. |
| 5043 | * Its only real responsibility is to set things up for the fork, |
| 5044 | * and tell GDB which two functions to call after the fork (one |
| 5045 | * for the parent, and one for the child). |
| 5046 | * |
| 5047 | * This function does a complicated search for a unix shell program, |
| 5048 | * which it then uses to parse arguments and environment variables |
| 5049 | * to be sent to the child. I wonder whether this code could not |
| 5050 | * be abstracted out and shared with other unix targets such as |
| 5051 | * infptrace? |
| 5052 | */ |
| 5053 | |
| 5054 | static void |
| 5055 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
| 5056 | char *allargs, char **env, int from_tty) |
| 5057 | { |
| 5058 | char *shell_file = getenv ("SHELL"); |
| 5059 | char *tryname; |
| 5060 | int pid; |
| 5061 | |
| 5062 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
| 5063 | { |
| 5064 | |
| 5065 | /* We will be looking down the PATH to find shell_file. If we |
| 5066 | just do this the normal way (via execlp, which operates by |
| 5067 | attempting an exec for each element of the PATH until it |
| 5068 | finds one which succeeds), then there will be an exec for |
| 5069 | each failed attempt, each of which will cause a PR_SYSEXIT |
| 5070 | stop, and we won't know how to distinguish the PR_SYSEXIT's |
| 5071 | for these failed execs with the ones for successful execs |
| 5072 | (whether the exec has succeeded is stored at that time in the |
| 5073 | carry bit or some such architecture-specific and |
| 5074 | non-ABI-specified place). |
| 5075 | |
| 5076 | So I can't think of anything better than to search the PATH |
| 5077 | now. This has several disadvantages: (1) There is a race |
| 5078 | condition; if we find a file now and it is deleted before we |
| 5079 | exec it, we lose, even if the deletion leaves a valid file |
| 5080 | further down in the PATH, (2) there is no way to know exactly |
| 5081 | what an executable (in the sense of "capable of being |
| 5082 | exec'd") file is. Using access() loses because it may lose |
| 5083 | if the caller is the superuser; failing to use it loses if |
| 5084 | there are ACLs or some such. */ |
| 5085 | |
| 5086 | char *p; |
| 5087 | char *p1; |
| 5088 | /* FIXME-maybe: might want "set path" command so user can change what |
| 5089 | path is used from within GDB. */ |
| 5090 | char *path = getenv ("PATH"); |
| 5091 | int len; |
| 5092 | struct stat statbuf; |
| 5093 | |
| 5094 | if (path == NULL) |
| 5095 | path = "/bin:/usr/bin"; |
| 5096 | |
| 5097 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); |
| 5098 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
| 5099 | { |
| 5100 | p1 = strchr (p, ':'); |
| 5101 | if (p1 != NULL) |
| 5102 | len = p1 - p; |
| 5103 | else |
| 5104 | len = strlen (p); |
| 5105 | strncpy (tryname, p, len); |
| 5106 | tryname[len] = '\0'; |
| 5107 | strcat (tryname, "/"); |
| 5108 | strcat (tryname, shell_file); |
| 5109 | if (access (tryname, X_OK) < 0) |
| 5110 | continue; |
| 5111 | if (stat (tryname, &statbuf) < 0) |
| 5112 | continue; |
| 5113 | if (!S_ISREG (statbuf.st_mode)) |
| 5114 | /* We certainly need to reject directories. I'm not quite |
| 5115 | as sure about FIFOs, sockets, etc., but I kind of doubt |
| 5116 | that people want to exec() these things. */ |
| 5117 | continue; |
| 5118 | break; |
| 5119 | } |
| 5120 | if (p == NULL) |
| 5121 | /* Not found. This must be an error rather than merely passing |
| 5122 | the file to execlp(), because execlp() would try all the |
| 5123 | exec()s, causing GDB to get confused. */ |
| 5124 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
| 5125 | __LINE__, shell_file); |
| 5126 | |
| 5127 | shell_file = tryname; |
| 5128 | } |
| 5129 | |
| 5130 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
| 5131 | NULL, NULL, shell_file); |
| 5132 | |
| 5133 | procfs_init_inferior (ops, pid); |
| 5134 | |
| 5135 | #ifdef SYS_syssgi |
| 5136 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
| 5137 | They should normally have been removed by now, but they may still |
| 5138 | be activated if the inferior doesn't use shared libraries, or if |
| 5139 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. |
| 5140 | See procfs_init_inferior() for more details. */ |
| 5141 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
| 5142 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); |
| 5143 | #endif |
| 5144 | } |
| 5145 | |
| 5146 | /* |
| 5147 | * Function: notice_thread |
| 5148 | * |
| 5149 | * Callback for find_new_threads. |
| 5150 | * Calls "add_thread". |
| 5151 | */ |
| 5152 | |
| 5153 | static int |
| 5154 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
| 5155 | { |
| 5156 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
| 5157 | |
| 5158 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
| 5159 | add_thread (gdb_threadid); |
| 5160 | |
| 5161 | return 0; |
| 5162 | } |
| 5163 | |
| 5164 | /* |
| 5165 | * Function: target_find_new_threads |
| 5166 | * |
| 5167 | * Query all the threads that the target knows about, |
| 5168 | * and give them back to GDB to add to its list. |
| 5169 | */ |
| 5170 | |
| 5171 | void |
| 5172 | procfs_find_new_threads (struct target_ops *ops) |
| 5173 | { |
| 5174 | procinfo *pi; |
| 5175 | |
| 5176 | /* Find procinfo for main process */ |
| 5177 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
| 5178 | proc_update_threads (pi); |
| 5179 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); |
| 5180 | } |
| 5181 | |
| 5182 | /* |
| 5183 | * Function: target_thread_alive |
| 5184 | * |
| 5185 | * Return true if the thread is still 'alive'. |
| 5186 | * |
| 5187 | * This guy doesn't really seem to be doing his job. |
| 5188 | * Got to investigate how to tell when a thread is really gone. |
| 5189 | */ |
| 5190 | |
| 5191 | static int |
| 5192 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 5193 | { |
| 5194 | int proc, thread; |
| 5195 | procinfo *pi; |
| 5196 | |
| 5197 | proc = PIDGET (ptid); |
| 5198 | thread = TIDGET (ptid); |
| 5199 | /* If I don't know it, it ain't alive! */ |
| 5200 | if ((pi = find_procinfo (proc, thread)) == NULL) |
| 5201 | return 0; |
| 5202 | |
| 5203 | /* If I can't get its status, it ain't alive! |
| 5204 | What's more, I need to forget about it! */ |
| 5205 | if (!proc_get_status (pi)) |
| 5206 | { |
| 5207 | destroy_procinfo (pi); |
| 5208 | return 0; |
| 5209 | } |
| 5210 | /* I couldn't have got its status if it weren't alive, so it's alive. */ |
| 5211 | return 1; |
| 5212 | } |
| 5213 | |
| 5214 | /* Convert PTID to a string. Returns the string in a static buffer. */ |
| 5215 | |
| 5216 | char * |
| 5217 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 5218 | { |
| 5219 | static char buf[80]; |
| 5220 | |
| 5221 | if (TIDGET (ptid) == 0) |
| 5222 | sprintf (buf, "process %d", PIDGET (ptid)); |
| 5223 | else |
| 5224 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
| 5225 | |
| 5226 | return buf; |
| 5227 | } |
| 5228 | |
| 5229 | /* |
| 5230 | * Function: procfs_set_watchpoint |
| 5231 | * Insert a watchpoint |
| 5232 | */ |
| 5233 | |
| 5234 | int |
| 5235 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
| 5236 | int after) |
| 5237 | { |
| 5238 | #ifndef UNIXWARE |
| 5239 | #ifndef AIX5 |
| 5240 | int pflags = 0; |
| 5241 | procinfo *pi; |
| 5242 | |
| 5243 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
| 5244 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
| 5245 | |
| 5246 | /* Translate from GDB's flags to /proc's */ |
| 5247 | if (len > 0) /* len == 0 means delete watchpoint */ |
| 5248 | { |
| 5249 | switch (rwflag) { /* FIXME: need an enum! */ |
| 5250 | case hw_write: /* default watchpoint (write) */ |
| 5251 | pflags = WRITE_WATCHFLAG; |
| 5252 | break; |
| 5253 | case hw_read: /* read watchpoint */ |
| 5254 | pflags = READ_WATCHFLAG; |
| 5255 | break; |
| 5256 | case hw_access: /* access watchpoint */ |
| 5257 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; |
| 5258 | break; |
| 5259 | case hw_execute: /* execution HW breakpoint */ |
| 5260 | pflags = EXEC_WATCHFLAG; |
| 5261 | break; |
| 5262 | default: /* Something weird. Return error. */ |
| 5263 | return -1; |
| 5264 | } |
| 5265 | if (after) /* Stop after r/w access is completed. */ |
| 5266 | pflags |= AFTER_WATCHFLAG; |
| 5267 | } |
| 5268 | |
| 5269 | if (!proc_set_watchpoint (pi, addr, len, pflags)) |
| 5270 | { |
| 5271 | if (errno == E2BIG) /* Typical error for no resources */ |
| 5272 | return -1; /* fail */ |
| 5273 | /* GDB may try to remove the same watchpoint twice. |
| 5274 | If a remove request returns no match, don't error. */ |
| 5275 | if (errno == ESRCH && len == 0) |
| 5276 | return 0; /* ignore */ |
| 5277 | proc_error (pi, "set_watchpoint", __LINE__); |
| 5278 | } |
| 5279 | #endif /* AIX5 */ |
| 5280 | #endif /* UNIXWARE */ |
| 5281 | return 0; |
| 5282 | } |
| 5283 | |
| 5284 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
| 5285 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, |
| 5286 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so |
| 5287 | far. |
| 5288 | |
| 5289 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
| 5290 | procfs.c targets due to the fact that some of them still define |
| 5291 | TARGET_CAN_USE_HARDWARE_WATCHPOINT. */ |
| 5292 | |
| 5293 | static int |
| 5294 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) |
| 5295 | { |
| 5296 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS |
| 5297 | return 0; |
| 5298 | #else |
| 5299 | /* Due to the way that proc_set_watchpoint() is implemented, host |
| 5300 | and target pointers must be of the same size. If they are not, |
| 5301 | we can't use hardware watchpoints. This limitation is due to the |
| 5302 | fact that proc_set_watchpoint() calls |
| 5303 | procfs_address_to_host_pointer(); a close inspection of |
| 5304 | procfs_address_to_host_pointer will reveal that an internal error |
| 5305 | will be generated when the host and target pointer sizes are |
| 5306 | different. */ |
| 5307 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
| 5308 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
| 5309 | return 0; |
| 5310 | |
| 5311 | /* Other tests here??? */ |
| 5312 | |
| 5313 | return 1; |
| 5314 | #endif |
| 5315 | } |
| 5316 | |
| 5317 | /* |
| 5318 | * Function: stopped_by_watchpoint |
| 5319 | * |
| 5320 | * Returns non-zero if process is stopped on a hardware watchpoint fault, |
| 5321 | * else returns zero. |
| 5322 | */ |
| 5323 | |
| 5324 | int |
| 5325 | procfs_stopped_by_watchpoint (ptid_t ptid) |
| 5326 | { |
| 5327 | procinfo *pi; |
| 5328 | |
| 5329 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
| 5330 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
| 5331 | |
| 5332 | if (!pi) /* If no process, then not stopped by watchpoint! */ |
| 5333 | return 0; |
| 5334 | |
| 5335 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
| 5336 | { |
| 5337 | if (proc_why (pi) == PR_FAULTED) |
| 5338 | { |
| 5339 | #ifdef FLTWATCH |
| 5340 | if (proc_what (pi) == FLTWATCH) |
| 5341 | return 1; |
| 5342 | #endif |
| 5343 | #ifdef FLTKWATCH |
| 5344 | if (proc_what (pi) == FLTKWATCH) |
| 5345 | return 1; |
| 5346 | #endif |
| 5347 | } |
| 5348 | } |
| 5349 | return 0; |
| 5350 | } |
| 5351 | |
| 5352 | /* |
| 5353 | * Memory Mappings Functions: |
| 5354 | */ |
| 5355 | |
| 5356 | /* |
| 5357 | * Function: iterate_over_mappings |
| 5358 | * |
| 5359 | * Call a callback function once for each mapping, passing it the mapping, |
| 5360 | * an optional secondary callback function, and some optional opaque data. |
| 5361 | * Quit and return the first non-zero value returned from the callback. |
| 5362 | * |
| 5363 | * Arguments: |
| 5364 | * pi -- procinfo struct for the process to be mapped. |
| 5365 | * func -- callback function to be called by this iterator. |
| 5366 | * data -- optional opaque data to be passed to the callback function. |
| 5367 | * child_func -- optional secondary function pointer to be passed |
| 5368 | * to the child function. |
| 5369 | * |
| 5370 | * Return: First non-zero return value from the callback function, |
| 5371 | * or zero. |
| 5372 | */ |
| 5373 | |
| 5374 | static int |
| 5375 | iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data, |
| 5376 | int (*func) (struct prmap *map, |
| 5377 | int (*child_func) (), |
| 5378 | void *data)) |
| 5379 | { |
| 5380 | char pathname[MAX_PROC_NAME_SIZE]; |
| 5381 | struct prmap *prmaps; |
| 5382 | struct prmap *prmap; |
| 5383 | int funcstat; |
| 5384 | int map_fd; |
| 5385 | int nmap; |
| 5386 | #ifdef NEW_PROC_API |
| 5387 | struct stat sbuf; |
| 5388 | #endif |
| 5389 | |
| 5390 | /* Get the number of mappings, allocate space, |
| 5391 | and read the mappings into prmaps. */ |
| 5392 | #ifdef NEW_PROC_API |
| 5393 | /* Open map fd. */ |
| 5394 | sprintf (pathname, "/proc/%d/map", pi->pid); |
| 5395 | if ((map_fd = open (pathname, O_RDONLY)) < 0) |
| 5396 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); |
| 5397 | |
| 5398 | /* Make sure it gets closed again. */ |
| 5399 | make_cleanup_close (map_fd); |
| 5400 | |
| 5401 | /* Use stat to determine the file size, and compute |
| 5402 | the number of prmap_t objects it contains. */ |
| 5403 | if (fstat (map_fd, &sbuf) != 0) |
| 5404 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); |
| 5405 | |
| 5406 | nmap = sbuf.st_size / sizeof (prmap_t); |
| 5407 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 5408 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) |
| 5409 | != (nmap * sizeof (*prmaps))) |
| 5410 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); |
| 5411 | #else |
| 5412 | /* Use ioctl command PIOCNMAP to get number of mappings. */ |
| 5413 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) |
| 5414 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); |
| 5415 | |
| 5416 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 5417 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) |
| 5418 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); |
| 5419 | #endif |
| 5420 | |
| 5421 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) |
| 5422 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) |
| 5423 | return funcstat; |
| 5424 | |
| 5425 | return 0; |
| 5426 | } |
| 5427 | |
| 5428 | /* |
| 5429 | * Function: solib_mappings_callback |
| 5430 | * |
| 5431 | * Calls the supplied callback function once for each mapped address |
| 5432 | * space in the process. The callback function receives an open |
| 5433 | * file descriptor for the file corresponding to that mapped |
| 5434 | * address space (if there is one), and the base address of the |
| 5435 | * mapped space. Quit when the callback function returns a |
| 5436 | * nonzero value, or at teh end of the mappings. |
| 5437 | * |
| 5438 | * Returns: the first non-zero return value of the callback function, |
| 5439 | * or zero. |
| 5440 | */ |
| 5441 | |
| 5442 | int solib_mappings_callback (struct prmap *map, |
| 5443 | int (*func) (int, CORE_ADDR), |
| 5444 | void *data) |
| 5445 | { |
| 5446 | procinfo *pi = data; |
| 5447 | int fd; |
| 5448 | |
| 5449 | #ifdef NEW_PROC_API |
| 5450 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; |
| 5451 | |
| 5452 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
| 5453 | return -1; /* sanity */ |
| 5454 | |
| 5455 | if (map->pr_mapname[0] == 0) |
| 5456 | { |
| 5457 | fd = -1; /* no map file */ |
| 5458 | } |
| 5459 | else |
| 5460 | { |
| 5461 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); |
| 5462 | /* Note: caller's responsibility to close this fd! */ |
| 5463 | fd = open_with_retry (name, O_RDONLY); |
| 5464 | /* Note: we don't test the above call for failure; |
| 5465 | we just pass the FD on as given. Sometimes there is |
| 5466 | no file, so the open may return failure, but that's |
| 5467 | not a problem. */ |
| 5468 | } |
| 5469 | #else |
| 5470 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); |
| 5471 | /* Note: we don't test the above call for failure; |
| 5472 | we just pass the FD on as given. Sometimes there is |
| 5473 | no file, so the ioctl may return failure, but that's |
| 5474 | not a problem. */ |
| 5475 | #endif |
| 5476 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); |
| 5477 | } |
| 5478 | |
| 5479 | /* |
| 5480 | * Function: proc_iterate_over_mappings |
| 5481 | * |
| 5482 | * Uses the unified "iterate_over_mappings" function |
| 5483 | * to implement the exported interface to solib-svr4.c. |
| 5484 | * |
| 5485 | * Given a pointer to a function, call that function once for every |
| 5486 | * mapped address space in the process. The callback function |
| 5487 | * receives an open file descriptor for the file corresponding to |
| 5488 | * that mapped address space (if there is one), and the base address |
| 5489 | * of the mapped space. Quit when the callback function returns a |
| 5490 | * nonzero value, or at teh end of the mappings. |
| 5491 | * |
| 5492 | * Returns: the first non-zero return value of the callback function, |
| 5493 | * or zero. |
| 5494 | */ |
| 5495 | |
| 5496 | int |
| 5497 | proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) |
| 5498 | { |
| 5499 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
| 5500 | |
| 5501 | return iterate_over_mappings (pi, func, pi, solib_mappings_callback); |
| 5502 | } |
| 5503 | |
| 5504 | /* |
| 5505 | * Function: find_memory_regions_callback |
| 5506 | * |
| 5507 | * Implements the to_find_memory_regions method. |
| 5508 | * Calls an external function for each memory region. |
| 5509 | * External function will have the signiture: |
| 5510 | * |
| 5511 | * int callback (CORE_ADDR vaddr, |
| 5512 | * unsigned long size, |
| 5513 | * int read, int write, int execute, |
| 5514 | * void *data); |
| 5515 | * |
| 5516 | * Returns the integer value returned by the callback. |
| 5517 | */ |
| 5518 | |
| 5519 | static int |
| 5520 | find_memory_regions_callback (struct prmap *map, |
| 5521 | int (*func) (CORE_ADDR, |
| 5522 | unsigned long, |
| 5523 | int, int, int, |
| 5524 | void *), |
| 5525 | void *data) |
| 5526 | { |
| 5527 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
| 5528 | map->pr_size, |
| 5529 | (map->pr_mflags & MA_READ) != 0, |
| 5530 | (map->pr_mflags & MA_WRITE) != 0, |
| 5531 | (map->pr_mflags & MA_EXEC) != 0, |
| 5532 | data); |
| 5533 | } |
| 5534 | |
| 5535 | /* |
| 5536 | * Function: proc_find_memory_regions |
| 5537 | * |
| 5538 | * External interface. Calls a callback function once for each |
| 5539 | * mapped memory region in the child process, passing as arguments |
| 5540 | * CORE_ADDR virtual_address, |
| 5541 | * unsigned long size, |
| 5542 | * int read, TRUE if region is readable by the child |
| 5543 | * int write, TRUE if region is writable by the child |
| 5544 | * int execute TRUE if region is executable by the child. |
| 5545 | * |
| 5546 | * Stops iterating and returns the first non-zero value |
| 5547 | * returned by the callback. |
| 5548 | */ |
| 5549 | |
| 5550 | static int |
| 5551 | proc_find_memory_regions (int (*func) (CORE_ADDR, |
| 5552 | unsigned long, |
| 5553 | int, int, int, |
| 5554 | void *), |
| 5555 | void *data) |
| 5556 | { |
| 5557 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
| 5558 | |
| 5559 | return iterate_over_mappings (pi, func, data, |
| 5560 | find_memory_regions_callback); |
| 5561 | } |
| 5562 | |
| 5563 | /* Remove the breakpoint that we inserted in __dbx_link(). |
| 5564 | Does nothing if the breakpoint hasn't been inserted or has already |
| 5565 | been removed. */ |
| 5566 | |
| 5567 | static void |
| 5568 | remove_dbx_link_breakpoint (void) |
| 5569 | { |
| 5570 | if (dbx_link_bpt_addr == 0) |
| 5571 | return; |
| 5572 | |
| 5573 | if (deprecated_remove_raw_breakpoint (dbx_link_bpt) != 0) |
| 5574 | warning (_("Unable to remove __dbx_link breakpoint.")); |
| 5575 | |
| 5576 | dbx_link_bpt_addr = 0; |
| 5577 | dbx_link_bpt = NULL; |
| 5578 | } |
| 5579 | |
| 5580 | /* Return the address of the __dbx_link() function in the file |
| 5581 | refernced by ABFD by scanning its symbol table. Return 0 if |
| 5582 | the symbol was not found. */ |
| 5583 | |
| 5584 | static CORE_ADDR |
| 5585 | dbx_link_addr (bfd *abfd) |
| 5586 | { |
| 5587 | long storage_needed; |
| 5588 | asymbol **symbol_table; |
| 5589 | long number_of_symbols; |
| 5590 | long i; |
| 5591 | |
| 5592 | storage_needed = bfd_get_symtab_upper_bound (abfd); |
| 5593 | if (storage_needed <= 0) |
| 5594 | return 0; |
| 5595 | |
| 5596 | symbol_table = (asymbol **) xmalloc (storage_needed); |
| 5597 | make_cleanup (xfree, symbol_table); |
| 5598 | |
| 5599 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); |
| 5600 | |
| 5601 | for (i = 0; i < number_of_symbols; i++) |
| 5602 | { |
| 5603 | asymbol *sym = symbol_table[i]; |
| 5604 | |
| 5605 | if ((sym->flags & BSF_GLOBAL) |
| 5606 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
| 5607 | return (sym->value + sym->section->vma); |
| 5608 | } |
| 5609 | |
| 5610 | /* Symbol not found, return NULL. */ |
| 5611 | return 0; |
| 5612 | } |
| 5613 | |
| 5614 | /* Search the symbol table of the file referenced by FD for a symbol |
| 5615 | named __dbx_link(). If found, then insert a breakpoint at this location, |
| 5616 | and return nonzero. Return zero otherwise. */ |
| 5617 | |
| 5618 | static int |
| 5619 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) |
| 5620 | { |
| 5621 | bfd *abfd; |
| 5622 | long storage_needed; |
| 5623 | CORE_ADDR sym_addr; |
| 5624 | |
| 5625 | abfd = bfd_fdopenr ("unamed", 0, fd); |
| 5626 | if (abfd == NULL) |
| 5627 | { |
| 5628 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); |
| 5629 | return 0; |
| 5630 | } |
| 5631 | |
| 5632 | if (!bfd_check_format (abfd, bfd_object)) |
| 5633 | { |
| 5634 | /* Not the correct format, so we can not possibly find the dbx_link |
| 5635 | symbol in it. */ |
| 5636 | bfd_close (abfd); |
| 5637 | return 0; |
| 5638 | } |
| 5639 | |
| 5640 | sym_addr = dbx_link_addr (abfd); |
| 5641 | if (sym_addr != 0) |
| 5642 | { |
| 5643 | /* Insert the breakpoint. */ |
| 5644 | dbx_link_bpt_addr = sym_addr; |
| 5645 | dbx_link_bpt = deprecated_insert_raw_breakpoint (sym_addr); |
| 5646 | if (dbx_link_bpt == NULL) |
| 5647 | { |
| 5648 | warning (_("Failed to insert dbx_link breakpoint.")); |
| 5649 | bfd_close (abfd); |
| 5650 | return 0; |
| 5651 | } |
| 5652 | bfd_close (abfd); |
| 5653 | return 1; |
| 5654 | } |
| 5655 | |
| 5656 | bfd_close (abfd); |
| 5657 | return 0; |
| 5658 | } |
| 5659 | |
| 5660 | /* If the given memory region MAP contains a symbol named __dbx_link, |
| 5661 | insert a breakpoint at this location and return nonzero. Return |
| 5662 | zero otherwise. */ |
| 5663 | |
| 5664 | static int |
| 5665 | insert_dbx_link_bpt_in_region (struct prmap *map, |
| 5666 | int (*child_func) (), |
| 5667 | void *data) |
| 5668 | { |
| 5669 | procinfo *pi = (procinfo *) data; |
| 5670 | |
| 5671 | /* We know the symbol we're looking for is in a text region, so |
| 5672 | only look for it if the region is a text one. */ |
| 5673 | if (map->pr_mflags & MA_EXEC) |
| 5674 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); |
| 5675 | |
| 5676 | return 0; |
| 5677 | } |
| 5678 | |
| 5679 | /* Search all memory regions for a symbol named __dbx_link. If found, |
| 5680 | insert a breakpoint at its location, and return nonzero. Return zero |
| 5681 | otherwise. */ |
| 5682 | |
| 5683 | static int |
| 5684 | insert_dbx_link_breakpoint (procinfo *pi) |
| 5685 | { |
| 5686 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); |
| 5687 | } |
| 5688 | |
| 5689 | /* |
| 5690 | * Function: mappingflags |
| 5691 | * |
| 5692 | * Returns an ascii representation of a memory mapping's flags. |
| 5693 | */ |
| 5694 | |
| 5695 | static char * |
| 5696 | mappingflags (long flags) |
| 5697 | { |
| 5698 | static char asciiflags[8]; |
| 5699 | |
| 5700 | strcpy (asciiflags, "-------"); |
| 5701 | #if defined (MA_PHYS) |
| 5702 | if (flags & MA_PHYS) |
| 5703 | asciiflags[0] = 'd'; |
| 5704 | #endif |
| 5705 | if (flags & MA_STACK) |
| 5706 | asciiflags[1] = 's'; |
| 5707 | if (flags & MA_BREAK) |
| 5708 | asciiflags[2] = 'b'; |
| 5709 | if (flags & MA_SHARED) |
| 5710 | asciiflags[3] = 's'; |
| 5711 | if (flags & MA_READ) |
| 5712 | asciiflags[4] = 'r'; |
| 5713 | if (flags & MA_WRITE) |
| 5714 | asciiflags[5] = 'w'; |
| 5715 | if (flags & MA_EXEC) |
| 5716 | asciiflags[6] = 'x'; |
| 5717 | return (asciiflags); |
| 5718 | } |
| 5719 | |
| 5720 | /* |
| 5721 | * Function: info_mappings_callback |
| 5722 | * |
| 5723 | * Callback function, does the actual work for 'info proc mappings'. |
| 5724 | */ |
| 5725 | |
| 5726 | static int |
| 5727 | info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused) |
| 5728 | { |
| 5729 | unsigned int pr_off; |
| 5730 | |
| 5731 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
| 5732 | pr_off = (unsigned int) map->pr_offset; |
| 5733 | #else |
| 5734 | pr_off = map->pr_off; |
| 5735 | #endif |
| 5736 | |
| 5737 | if (gdbarch_addr_bit (current_gdbarch) == 32) |
| 5738 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
| 5739 | (unsigned long) map->pr_vaddr, |
| 5740 | (unsigned long) map->pr_vaddr + map->pr_size - 1, |
| 5741 | (unsigned long) map->pr_size, |
| 5742 | pr_off, |
| 5743 | mappingflags (map->pr_mflags)); |
| 5744 | else |
| 5745 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
| 5746 | (unsigned long) map->pr_vaddr, |
| 5747 | (unsigned long) map->pr_vaddr + map->pr_size - 1, |
| 5748 | (unsigned long) map->pr_size, |
| 5749 | pr_off, |
| 5750 | mappingflags (map->pr_mflags)); |
| 5751 | |
| 5752 | return 0; |
| 5753 | } |
| 5754 | |
| 5755 | /* |
| 5756 | * Function: info_proc_mappings |
| 5757 | * |
| 5758 | * Implement the "info proc mappings" subcommand. |
| 5759 | */ |
| 5760 | |
| 5761 | static void |
| 5762 | info_proc_mappings (procinfo *pi, int summary) |
| 5763 | { |
| 5764 | if (summary) |
| 5765 | return; /* No output for summary mode. */ |
| 5766 | |
| 5767 | printf_filtered (_("Mapped address spaces:\n\n")); |
| 5768 | if (gdbarch_ptr_bit (current_gdbarch) == 32) |
| 5769 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
| 5770 | "Start Addr", |
| 5771 | " End Addr", |
| 5772 | " Size", |
| 5773 | " Offset", |
| 5774 | "Flags"); |
| 5775 | else |
| 5776 | printf_filtered (" %18s %18s %10s %10s %7s\n", |
| 5777 | "Start Addr", |
| 5778 | " End Addr", |
| 5779 | " Size", |
| 5780 | " Offset", |
| 5781 | "Flags"); |
| 5782 | |
| 5783 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
| 5784 | printf_filtered ("\n"); |
| 5785 | } |
| 5786 | |
| 5787 | /* |
| 5788 | * Function: info_proc_cmd |
| 5789 | * |
| 5790 | * Implement the "info proc" command. |
| 5791 | */ |
| 5792 | |
| 5793 | static void |
| 5794 | info_proc_cmd (char *args, int from_tty) |
| 5795 | { |
| 5796 | struct cleanup *old_chain; |
| 5797 | procinfo *process = NULL; |
| 5798 | procinfo *thread = NULL; |
| 5799 | char **argv = NULL; |
| 5800 | char *tmp = NULL; |
| 5801 | int pid = 0; |
| 5802 | int tid = 0; |
| 5803 | int mappings = 0; |
| 5804 | |
| 5805 | old_chain = make_cleanup (null_cleanup, 0); |
| 5806 | if (args) |
| 5807 | { |
| 5808 | argv = gdb_buildargv (args); |
| 5809 | make_cleanup_freeargv (argv); |
| 5810 | } |
| 5811 | while (argv != NULL && *argv != NULL) |
| 5812 | { |
| 5813 | if (isdigit (argv[0][0])) |
| 5814 | { |
| 5815 | pid = strtoul (argv[0], &tmp, 10); |
| 5816 | if (*tmp == '/') |
| 5817 | tid = strtoul (++tmp, NULL, 10); |
| 5818 | } |
| 5819 | else if (argv[0][0] == '/') |
| 5820 | { |
| 5821 | tid = strtoul (argv[0] + 1, NULL, 10); |
| 5822 | } |
| 5823 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
| 5824 | { |
| 5825 | mappings = 1; |
| 5826 | } |
| 5827 | else |
| 5828 | { |
| 5829 | /* [...] */ |
| 5830 | } |
| 5831 | argv++; |
| 5832 | } |
| 5833 | if (pid == 0) |
| 5834 | pid = PIDGET (inferior_ptid); |
| 5835 | if (pid == 0) |
| 5836 | error (_("No current process: you must name one.")); |
| 5837 | else |
| 5838 | { |
| 5839 | /* Have pid, will travel. |
| 5840 | First see if it's a process we're already debugging. */ |
| 5841 | process = find_procinfo (pid, 0); |
| 5842 | if (process == NULL) |
| 5843 | { |
| 5844 | /* No. So open a procinfo for it, but |
| 5845 | remember to close it again when finished. */ |
| 5846 | process = create_procinfo (pid, 0); |
| 5847 | make_cleanup (do_destroy_procinfo_cleanup, process); |
| 5848 | if (!open_procinfo_files (process, FD_CTL)) |
| 5849 | proc_error (process, "info proc, open_procinfo_files", __LINE__); |
| 5850 | } |
| 5851 | } |
| 5852 | if (tid != 0) |
| 5853 | thread = create_procinfo (pid, tid); |
| 5854 | |
| 5855 | if (process) |
| 5856 | { |
| 5857 | printf_filtered (_("process %d flags:\n"), process->pid); |
| 5858 | proc_prettyprint_flags (proc_flags (process), 1); |
| 5859 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) |
| 5860 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); |
| 5861 | if (proc_get_nthreads (process) > 1) |
| 5862 | printf_filtered ("Process has %d threads.\n", |
| 5863 | proc_get_nthreads (process)); |
| 5864 | } |
| 5865 | if (thread) |
| 5866 | { |
| 5867 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
| 5868 | proc_prettyprint_flags (proc_flags (thread), 1); |
| 5869 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) |
| 5870 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); |
| 5871 | } |
| 5872 | |
| 5873 | if (mappings) |
| 5874 | { |
| 5875 | info_proc_mappings (process, 0); |
| 5876 | } |
| 5877 | |
| 5878 | do_cleanups (old_chain); |
| 5879 | } |
| 5880 | |
| 5881 | /* Modify the status of the system call identified by SYSCALLNUM in |
| 5882 | the set of syscalls that are currently traced/debugged. |
| 5883 | |
| 5884 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set |
| 5885 | will be updated. Otherwise, the exit syscalls set will be updated. |
| 5886 | |
| 5887 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
| 5888 | will be disabled. */ |
| 5889 | |
| 5890 | static void |
| 5891 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, |
| 5892 | int mode, int from_tty) |
| 5893 | { |
| 5894 | sysset_t *sysset; |
| 5895 | |
| 5896 | if (entry_or_exit == PR_SYSENTRY) |
| 5897 | sysset = proc_get_traced_sysentry (pi, NULL); |
| 5898 | else |
| 5899 | sysset = proc_get_traced_sysexit (pi, NULL); |
| 5900 | |
| 5901 | if (sysset == NULL) |
| 5902 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); |
| 5903 | |
| 5904 | if (mode == FLAG_SET) |
| 5905 | gdb_praddsysset (sysset, syscallnum); |
| 5906 | else |
| 5907 | gdb_prdelsysset (sysset, syscallnum); |
| 5908 | |
| 5909 | if (entry_or_exit == PR_SYSENTRY) |
| 5910 | { |
| 5911 | if (!proc_set_traced_sysentry (pi, sysset)) |
| 5912 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
| 5913 | } |
| 5914 | else |
| 5915 | { |
| 5916 | if (!proc_set_traced_sysexit (pi, sysset)) |
| 5917 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
| 5918 | } |
| 5919 | } |
| 5920 | |
| 5921 | static void |
| 5922 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
| 5923 | { |
| 5924 | procinfo *pi; |
| 5925 | |
| 5926 | if (PIDGET (inferior_ptid) <= 0) |
| 5927 | error (_("you must be debugging a process to use this command.")); |
| 5928 | |
| 5929 | if (args == NULL || args[0] == 0) |
| 5930 | error_no_arg (_("system call to trace")); |
| 5931 | |
| 5932 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
| 5933 | if (isdigit (args[0])) |
| 5934 | { |
| 5935 | const int syscallnum = atoi (args); |
| 5936 | |
| 5937 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
| 5938 | } |
| 5939 | } |
| 5940 | |
| 5941 | static void |
| 5942 | proc_trace_sysentry_cmd (char *args, int from_tty) |
| 5943 | { |
| 5944 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
| 5945 | } |
| 5946 | |
| 5947 | static void |
| 5948 | proc_trace_sysexit_cmd (char *args, int from_tty) |
| 5949 | { |
| 5950 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); |
| 5951 | } |
| 5952 | |
| 5953 | static void |
| 5954 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
| 5955 | { |
| 5956 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); |
| 5957 | } |
| 5958 | |
| 5959 | static void |
| 5960 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
| 5961 | { |
| 5962 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
| 5963 | } |
| 5964 | |
| 5965 | |
| 5966 | void |
| 5967 | _initialize_procfs (void) |
| 5968 | { |
| 5969 | struct target_ops * t; |
| 5970 | |
| 5971 | t = procfs_target (); |
| 5972 | |
| 5973 | add_target (t); |
| 5974 | |
| 5975 | add_info ("proc", info_proc_cmd, _("\ |
| 5976 | Show /proc process information about any running process.\n\ |
| 5977 | Specify process id, or use the program being debugged by default.\n\ |
| 5978 | Specify keyword 'mappings' for detailed info on memory mappings.")); |
| 5979 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
| 5980 | _("Give a trace of entries into the syscall.")); |
| 5981 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
| 5982 | _("Give a trace of exits from the syscall.")); |
| 5983 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
| 5984 | _("Cancel a trace of entries into the syscall.")); |
| 5985 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
| 5986 | _("Cancel a trace of exits from the syscall.")); |
| 5987 | } |
| 5988 | |
| 5989 | /* =================== END, GDB "MODULE" =================== */ |
| 5990 | |
| 5991 | |
| 5992 | |
| 5993 | /* miscellaneous stubs: */ |
| 5994 | /* The following satisfy a few random symbols mostly created by */ |
| 5995 | /* the solaris threads implementation, which I will chase down */ |
| 5996 | /* later. */ |
| 5997 | |
| 5998 | /* |
| 5999 | * Return a pid for which we guarantee |
| 6000 | * we will be able to find a 'live' procinfo. |
| 6001 | */ |
| 6002 | |
| 6003 | ptid_t |
| 6004 | procfs_first_available (void) |
| 6005 | { |
| 6006 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
| 6007 | } |
| 6008 | |
| 6009 | static int |
| 6010 | find_signalled_thread (struct thread_info *info, void *data) |
| 6011 | { |
| 6012 | if (info->stop_signal != TARGET_SIGNAL_0 |
| 6013 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
| 6014 | return 1; |
| 6015 | |
| 6016 | return 0; |
| 6017 | } |
| 6018 | |
| 6019 | static enum target_signal |
| 6020 | find_stop_signal (void) |
| 6021 | { |
| 6022 | struct thread_info *info = |
| 6023 | iterate_over_threads (find_signalled_thread, NULL); |
| 6024 | |
| 6025 | if (info) |
| 6026 | return info->stop_signal; |
| 6027 | else |
| 6028 | return TARGET_SIGNAL_0; |
| 6029 | } |
| 6030 | |
| 6031 | /* =================== GCORE .NOTE "MODULE" =================== */ |
| 6032 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
| 6033 | /* gcore only implemented on solaris and unixware (so far) */ |
| 6034 | |
| 6035 | static char * |
| 6036 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
| 6037 | char *note_data, int *note_size, |
| 6038 | enum target_signal stop_signal) |
| 6039 | { |
| 6040 | struct regcache *regcache = get_thread_regcache (ptid); |
| 6041 | gdb_gregset_t gregs; |
| 6042 | gdb_fpregset_t fpregs; |
| 6043 | unsigned long merged_pid; |
| 6044 | |
| 6045 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); |
| 6046 | |
| 6047 | fill_gregset (regcache, &gregs, -1); |
| 6048 | #if defined (UNIXWARE) |
| 6049 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
| 6050 | note_data, |
| 6051 | note_size, |
| 6052 | merged_pid, |
| 6053 | stop_signal, |
| 6054 | &gregs); |
| 6055 | #else |
| 6056 | note_data = (char *) elfcore_write_prstatus (obfd, |
| 6057 | note_data, |
| 6058 | note_size, |
| 6059 | merged_pid, |
| 6060 | stop_signal, |
| 6061 | &gregs); |
| 6062 | #endif |
| 6063 | fill_fpregset (regcache, &fpregs, -1); |
| 6064 | note_data = (char *) elfcore_write_prfpreg (obfd, |
| 6065 | note_data, |
| 6066 | note_size, |
| 6067 | &fpregs, |
| 6068 | sizeof (fpregs)); |
| 6069 | return note_data; |
| 6070 | } |
| 6071 | |
| 6072 | struct procfs_corefile_thread_data { |
| 6073 | bfd *obfd; |
| 6074 | char *note_data; |
| 6075 | int *note_size; |
| 6076 | enum target_signal stop_signal; |
| 6077 | }; |
| 6078 | |
| 6079 | static int |
| 6080 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
| 6081 | { |
| 6082 | struct procfs_corefile_thread_data *args = data; |
| 6083 | |
| 6084 | if (pi != NULL) |
| 6085 | { |
| 6086 | ptid_t saved_ptid = inferior_ptid; |
| 6087 | inferior_ptid = MERGEPID (pi->pid, thread->tid); |
| 6088 | args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid, |
| 6089 | args->note_data, |
| 6090 | args->note_size, |
| 6091 | args->stop_signal); |
| 6092 | inferior_ptid = saved_ptid; |
| 6093 | } |
| 6094 | return 0; |
| 6095 | } |
| 6096 | |
| 6097 | static char * |
| 6098 | procfs_make_note_section (bfd *obfd, int *note_size) |
| 6099 | { |
| 6100 | struct cleanup *old_chain; |
| 6101 | gdb_gregset_t gregs; |
| 6102 | gdb_fpregset_t fpregs; |
| 6103 | char fname[16] = {'\0'}; |
| 6104 | char psargs[80] = {'\0'}; |
| 6105 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
| 6106 | char *note_data = NULL; |
| 6107 | char *inf_args; |
| 6108 | struct procfs_corefile_thread_data thread_args; |
| 6109 | gdb_byte *auxv; |
| 6110 | int auxv_len; |
| 6111 | |
| 6112 | if (get_exec_file (0)) |
| 6113 | { |
| 6114 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); |
| 6115 | strncpy (psargs, get_exec_file (0), |
| 6116 | sizeof (psargs)); |
| 6117 | |
| 6118 | inf_args = get_inferior_args (); |
| 6119 | if (inf_args && *inf_args && |
| 6120 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) |
| 6121 | { |
| 6122 | strncat (psargs, " ", |
| 6123 | sizeof (psargs) - strlen (psargs)); |
| 6124 | strncat (psargs, inf_args, |
| 6125 | sizeof (psargs) - strlen (psargs)); |
| 6126 | } |
| 6127 | } |
| 6128 | |
| 6129 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
| 6130 | note_data, |
| 6131 | note_size, |
| 6132 | fname, |
| 6133 | psargs); |
| 6134 | |
| 6135 | #ifdef UNIXWARE |
| 6136 | fill_gregset (get_current_regcache (), &gregs, -1); |
| 6137 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
| 6138 | PIDGET (inferior_ptid), |
| 6139 | stop_signal, &gregs); |
| 6140 | #endif |
| 6141 | |
| 6142 | thread_args.obfd = obfd; |
| 6143 | thread_args.note_data = note_data; |
| 6144 | thread_args.note_size = note_size; |
| 6145 | thread_args.stop_signal = find_stop_signal (); |
| 6146 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
| 6147 | |
| 6148 | /* There should be always at least one thread. */ |
| 6149 | gdb_assert (thread_args.note_data != note_data); |
| 6150 | note_data = thread_args.note_data; |
| 6151 | |
| 6152 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
| 6153 | NULL, &auxv); |
| 6154 | if (auxv_len > 0) |
| 6155 | { |
| 6156 | note_data = elfcore_write_note (obfd, note_data, note_size, |
| 6157 | "CORE", NT_AUXV, auxv, auxv_len); |
| 6158 | xfree (auxv); |
| 6159 | } |
| 6160 | |
| 6161 | make_cleanup (xfree, note_data); |
| 6162 | return note_data; |
| 6163 | } |
| 6164 | #else /* !(Solaris or Unixware) */ |
| 6165 | static char * |
| 6166 | procfs_make_note_section (bfd *obfd, int *note_size) |
| 6167 | { |
| 6168 | error (_("gcore not implemented for this host.")); |
| 6169 | return NULL; /* lint */ |
| 6170 | } |
| 6171 | #endif /* Solaris or Unixware */ |
| 6172 | /* =================== END GCORE .NOTE "MODULE" =================== */ |