| 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
| 2 | Copyright 1991, 1992 Free Software Foundation, Inc. |
| 3 | Written by Fred Fish at Cygnus Support. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | |
| 22 | /* N O T E S |
| 23 | |
| 24 | For information on the details of using /proc consult section proc(4) |
| 25 | in the UNIX System V Release 4 System Administrator's Reference Manual. |
| 26 | |
| 27 | The general register and floating point register sets are manipulated by |
| 28 | separate ioctl's. This file makes the assumption that if FP0_REGNUM is |
| 29 | defined, then support for the floating point register set is desired, |
| 30 | regardless of whether or not the actual target has floating point hardware. |
| 31 | |
| 32 | */ |
| 33 | |
| 34 | |
| 35 | #include "defs.h" |
| 36 | |
| 37 | #include <sys/types.h> |
| 38 | #include <time.h> |
| 39 | #include <sys/procfs.h> |
| 40 | #include <fcntl.h> |
| 41 | #include <errno.h> |
| 42 | #include <string.h> |
| 43 | #include <stropts.h> |
| 44 | #include <poll.h> |
| 45 | #include <unistd.h> |
| 46 | #include <sys/stat.h> |
| 47 | |
| 48 | #include "inferior.h" |
| 49 | #include "target.h" |
| 50 | #include "command.h" |
| 51 | #include "gdbcore.h" |
| 52 | |
| 53 | #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */ |
| 54 | |
| 55 | #ifndef PROC_NAME_FMT |
| 56 | #define PROC_NAME_FMT "/proc/%05d" |
| 57 | #endif |
| 58 | |
| 59 | extern struct target_ops procfs_ops; /* Forward declaration */ |
| 60 | |
| 61 | #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */ |
| 62 | CORE_ADDR kernel_u_addr; |
| 63 | #endif |
| 64 | |
| 65 | #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */ |
| 66 | #undef si_pid |
| 67 | #define si_pid _data._proc.pid |
| 68 | #undef si_uid |
| 69 | #define si_uid _data._proc._pdata._kill.uid |
| 70 | #endif /* BROKEN_SIGINFO_H */ |
| 71 | |
| 72 | /* All access to the inferior, either one started by gdb or one that has |
| 73 | been attached to, is controlled by an instance of a procinfo structure, |
| 74 | defined below. Since gdb currently only handles one inferior at a time, |
| 75 | the procinfo structure for the inferior is statically allocated and |
| 76 | only one exists at any given time. There is a separate procinfo |
| 77 | structure for use by the "info proc" command, so that we can print |
| 78 | useful information about any random process without interfering with |
| 79 | the inferior's procinfo information. */ |
| 80 | |
| 81 | struct procinfo { |
| 82 | struct procinfo *next; |
| 83 | int pid; /* Process ID of inferior */ |
| 84 | int fd; /* File descriptor for /proc entry */ |
| 85 | char *pathname; /* Pathname to /proc entry */ |
| 86 | int had_event; /* poll/select says something happened */ |
| 87 | int was_stopped; /* Nonzero if was stopped prior to attach */ |
| 88 | int nopass_next_sigstop; /* Don't pass a sigstop on next resume */ |
| 89 | prrun_t prrun; /* Control state when it is run */ |
| 90 | prstatus_t prstatus; /* Current process status info */ |
| 91 | gregset_t gregset; /* General register set */ |
| 92 | fpregset_t fpregset; /* Floating point register set */ |
| 93 | fltset_t fltset; /* Current traced hardware fault set */ |
| 94 | sigset_t trace; /* Current traced signal set */ |
| 95 | sysset_t exitset; /* Current traced system call exit set */ |
| 96 | sysset_t entryset; /* Current traced system call entry set */ |
| 97 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
| 98 | sigset_t saved_trace; /* Saved traced signal set */ |
| 99 | sigset_t saved_sighold; /* Saved held signal set */ |
| 100 | sysset_t saved_exitset; /* Saved traced system call exit set */ |
| 101 | sysset_t saved_entryset; /* Saved traced system call entry set */ |
| 102 | }; |
| 103 | |
| 104 | /* List of inferior process information */ |
| 105 | static struct procinfo *procinfo_list = NULL; |
| 106 | |
| 107 | static struct pollfd *poll_list; /* pollfds used for waiting on /proc */ |
| 108 | |
| 109 | static int num_poll_list = 0; /* Number of entries in poll_list */ |
| 110 | |
| 111 | static int last_resume_pid = -1; /* Last pid used with procfs_resume */ |
| 112 | |
| 113 | /* Much of the information used in the /proc interface, particularly for |
| 114 | printing status information, is kept as tables of structures of the |
| 115 | following form. These tables can be used to map numeric values to |
| 116 | their symbolic names and to a string that describes their specific use. */ |
| 117 | |
| 118 | struct trans { |
| 119 | int value; /* The numeric value */ |
| 120 | char *name; /* The equivalent symbolic value */ |
| 121 | char *desc; /* Short description of value */ |
| 122 | }; |
| 123 | |
| 124 | /* Translate bits in the pr_flags member of the prstatus structure, into the |
| 125 | names and desc information. */ |
| 126 | |
| 127 | static struct trans pr_flag_table[] = |
| 128 | { |
| 129 | #if defined (PR_STOPPED) |
| 130 | PR_STOPPED, "PR_STOPPED", "Process is stopped", |
| 131 | #endif |
| 132 | #if defined (PR_ISTOP) |
| 133 | PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest", |
| 134 | #endif |
| 135 | #if defined (PR_DSTOP) |
| 136 | PR_DSTOP, "PR_DSTOP", "A stop directive is in effect", |
| 137 | #endif |
| 138 | #if defined (PR_ASLEEP) |
| 139 | PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call", |
| 140 | #endif |
| 141 | #if defined (PR_FORK) |
| 142 | PR_FORK, "PR_FORK", "Inherit-on-fork is in effect", |
| 143 | #endif |
| 144 | #if defined (PR_RLC) |
| 145 | PR_RLC, "PR_RLC", "Run-on-last-close is in effect", |
| 146 | #endif |
| 147 | #if defined (PR_PTRACE) |
| 148 | PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace", |
| 149 | #endif |
| 150 | #if defined (PR_PCINVAL) |
| 151 | PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address", |
| 152 | #endif |
| 153 | #if defined (PR_ISSYS) |
| 154 | PR_ISSYS, "PR_ISSYS", "Is a system process", |
| 155 | #endif |
| 156 | #if defined (PR_STEP) |
| 157 | PR_STEP, "PR_STEP", "Process has single step pending", |
| 158 | #endif |
| 159 | #if defined (PR_KLC) |
| 160 | PR_KLC, "PR_KLC", "Kill-on-last-close is in effect", |
| 161 | #endif |
| 162 | #if defined (PR_ASYNC) |
| 163 | PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect", |
| 164 | #endif |
| 165 | #if defined (PR_PCOMPAT) |
| 166 | PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect", |
| 167 | #endif |
| 168 | 0, NULL, NULL |
| 169 | }; |
| 170 | |
| 171 | /* Translate values in the pr_why field of the prstatus struct. */ |
| 172 | |
| 173 | static struct trans pr_why_table[] = |
| 174 | { |
| 175 | #if defined (PR_REQUESTED) |
| 176 | PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP", |
| 177 | #endif |
| 178 | #if defined (PR_SIGNALLED) |
| 179 | PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal", |
| 180 | #endif |
| 181 | #if defined (PR_FAULTED) |
| 182 | PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault", |
| 183 | #endif |
| 184 | #if defined (PR_SYSENTRY) |
| 185 | PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call", |
| 186 | #endif |
| 187 | #if defined (PR_SYSEXIT) |
| 188 | PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call", |
| 189 | #endif |
| 190 | #if defined (PR_JOBCONTROL) |
| 191 | PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action", |
| 192 | #endif |
| 193 | #if defined (PR_SUSPENDED) |
| 194 | PR_SUSPENDED, "PR_SUSPENDED", "Process suspended", |
| 195 | #endif |
| 196 | 0, NULL, NULL |
| 197 | }; |
| 198 | |
| 199 | /* Hardware fault translation table. */ |
| 200 | |
| 201 | static struct trans faults_table[] = |
| 202 | { |
| 203 | #if defined (FLTILL) |
| 204 | FLTILL, "FLTILL", "Illegal instruction", |
| 205 | #endif |
| 206 | #if defined (FLTPRIV) |
| 207 | FLTPRIV, "FLTPRIV", "Privileged instruction", |
| 208 | #endif |
| 209 | #if defined (FLTBPT) |
| 210 | FLTBPT, "FLTBPT", "Breakpoint trap", |
| 211 | #endif |
| 212 | #if defined (FLTTRACE) |
| 213 | FLTTRACE, "FLTTRACE", "Trace trap", |
| 214 | #endif |
| 215 | #if defined (FLTACCESS) |
| 216 | FLTACCESS, "FLTACCESS", "Memory access fault", |
| 217 | #endif |
| 218 | #if defined (FLTBOUNDS) |
| 219 | FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation", |
| 220 | #endif |
| 221 | #if defined (FLTIOVF) |
| 222 | FLTIOVF, "FLTIOVF", "Integer overflow", |
| 223 | #endif |
| 224 | #if defined (FLTIZDIV) |
| 225 | FLTIZDIV, "FLTIZDIV", "Integer zero divide", |
| 226 | #endif |
| 227 | #if defined (FLTFPE) |
| 228 | FLTFPE, "FLTFPE", "Floating-point exception", |
| 229 | #endif |
| 230 | #if defined (FLTSTACK) |
| 231 | FLTSTACK, "FLTSTACK", "Unrecoverable stack fault", |
| 232 | #endif |
| 233 | #if defined (FLTPAGE) |
| 234 | FLTPAGE, "FLTPAGE", "Recoverable page fault", |
| 235 | #endif |
| 236 | 0, NULL, NULL |
| 237 | }; |
| 238 | |
| 239 | /* Translation table for signal generation information. See UNIX System |
| 240 | V Release 4 Programmer's Reference Manual, siginfo(5). */ |
| 241 | |
| 242 | static struct sigcode { |
| 243 | int signo; |
| 244 | int code; |
| 245 | char *codename; |
| 246 | char *desc; |
| 247 | } siginfo_table[] = { |
| 248 | #if defined (SIGILL) && defined (ILL_ILLOPC) |
| 249 | SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode", |
| 250 | #endif |
| 251 | #if defined (SIGILL) && defined (ILL_ILLOPN) |
| 252 | SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", |
| 253 | #endif |
| 254 | #if defined (SIGILL) && defined (ILL_ILLADR) |
| 255 | SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode", |
| 256 | #endif |
| 257 | #if defined (SIGILL) && defined (ILL_ILLTRP) |
| 258 | SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap", |
| 259 | #endif |
| 260 | #if defined (SIGILL) && defined (ILL_PRVOPC) |
| 261 | SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode", |
| 262 | #endif |
| 263 | #if defined (SIGILL) && defined (ILL_PRVREG) |
| 264 | SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register", |
| 265 | #endif |
| 266 | #if defined (SIGILL) && defined (ILL_COPROC) |
| 267 | SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error", |
| 268 | #endif |
| 269 | #if defined (SIGILL) && defined (ILL_BADSTK) |
| 270 | SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error", |
| 271 | #endif |
| 272 | #if defined (SIGFPE) && defined (FPE_INTDIV) |
| 273 | SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero", |
| 274 | #endif |
| 275 | #if defined (SIGFPE) && defined (FPE_INTOVF) |
| 276 | SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow", |
| 277 | #endif |
| 278 | #if defined (SIGFPE) && defined (FPE_FLTDIV) |
| 279 | SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero", |
| 280 | #endif |
| 281 | #if defined (SIGFPE) && defined (FPE_FLTOVF) |
| 282 | SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow", |
| 283 | #endif |
| 284 | #if defined (SIGFPE) && defined (FPE_FLTUND) |
| 285 | SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow", |
| 286 | #endif |
| 287 | #if defined (SIGFPE) && defined (FPE_FLTRES) |
| 288 | SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result", |
| 289 | #endif |
| 290 | #if defined (SIGFPE) && defined (FPE_FLTINV) |
| 291 | SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation", |
| 292 | #endif |
| 293 | #if defined (SIGFPE) && defined (FPE_FLTSUB) |
| 294 | SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range", |
| 295 | #endif |
| 296 | #if defined (SIGSEGV) && defined (SEGV_MAPERR) |
| 297 | SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object", |
| 298 | #endif |
| 299 | #if defined (SIGSEGV) && defined (SEGV_ACCERR) |
| 300 | SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object", |
| 301 | #endif |
| 302 | #if defined (SIGBUS) && defined (BUS_ADRALN) |
| 303 | SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment", |
| 304 | #endif |
| 305 | #if defined (SIGBUS) && defined (BUS_ADRERR) |
| 306 | SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address", |
| 307 | #endif |
| 308 | #if defined (SIGBUS) && defined (BUS_OBJERR) |
| 309 | SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error", |
| 310 | #endif |
| 311 | #if defined (SIGTRAP) && defined (TRAP_BRKPT) |
| 312 | SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint", |
| 313 | #endif |
| 314 | #if defined (SIGTRAP) && defined (TRAP_TRACE) |
| 315 | SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap", |
| 316 | #endif |
| 317 | #if defined (SIGCLD) && defined (CLD_EXITED) |
| 318 | SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited", |
| 319 | #endif |
| 320 | #if defined (SIGCLD) && defined (CLD_KILLED) |
| 321 | SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed", |
| 322 | #endif |
| 323 | #if defined (SIGCLD) && defined (CLD_DUMPED) |
| 324 | SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally", |
| 325 | #endif |
| 326 | #if defined (SIGCLD) && defined (CLD_TRAPPED) |
| 327 | SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped", |
| 328 | #endif |
| 329 | #if defined (SIGCLD) && defined (CLD_STOPPED) |
| 330 | SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped", |
| 331 | #endif |
| 332 | #if defined (SIGCLD) && defined (CLD_CONTINUED) |
| 333 | SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued", |
| 334 | #endif |
| 335 | #if defined (SIGPOLL) && defined (POLL_IN) |
| 336 | SIGPOLL, POLL_IN, "POLL_IN", "Input input available", |
| 337 | #endif |
| 338 | #if defined (SIGPOLL) && defined (POLL_OUT) |
| 339 | SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available", |
| 340 | #endif |
| 341 | #if defined (SIGPOLL) && defined (POLL_MSG) |
| 342 | SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available", |
| 343 | #endif |
| 344 | #if defined (SIGPOLL) && defined (POLL_ERR) |
| 345 | SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error", |
| 346 | #endif |
| 347 | #if defined (SIGPOLL) && defined (POLL_PRI) |
| 348 | SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available", |
| 349 | #endif |
| 350 | #if defined (SIGPOLL) && defined (POLL_HUP) |
| 351 | SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected", |
| 352 | #endif |
| 353 | 0, 0, NULL, NULL |
| 354 | }; |
| 355 | |
| 356 | static char *syscall_table[MAX_SYSCALLS]; |
| 357 | |
| 358 | /* Prototypes for local functions */ |
| 359 | |
| 360 | static void |
| 361 | set_proc_siginfo PARAMS ((struct procinfo *, int)); |
| 362 | |
| 363 | static void |
| 364 | init_syscall_table PARAMS ((void)); |
| 365 | |
| 366 | static char * |
| 367 | syscallname PARAMS ((int)); |
| 368 | |
| 369 | static char * |
| 370 | signalname PARAMS ((int)); |
| 371 | |
| 372 | static char * |
| 373 | errnoname PARAMS ((int)); |
| 374 | |
| 375 | static int |
| 376 | proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int)); |
| 377 | |
| 378 | static int |
| 379 | open_proc_file PARAMS ((int, struct procinfo *, int)); |
| 380 | |
| 381 | static void |
| 382 | close_proc_file PARAMS ((struct procinfo *)); |
| 383 | |
| 384 | static void |
| 385 | unconditionally_kill_inferior PARAMS ((struct procinfo *)); |
| 386 | |
| 387 | static NORETURN void |
| 388 | proc_init_failed PARAMS ((struct procinfo *, char *)); |
| 389 | |
| 390 | static void |
| 391 | info_proc PARAMS ((char *, int)); |
| 392 | |
| 393 | static void |
| 394 | info_proc_flags PARAMS ((struct procinfo *, int)); |
| 395 | |
| 396 | static void |
| 397 | info_proc_stop PARAMS ((struct procinfo *, int)); |
| 398 | |
| 399 | static void |
| 400 | info_proc_siginfo PARAMS ((struct procinfo *, int)); |
| 401 | |
| 402 | static void |
| 403 | info_proc_syscalls PARAMS ((struct procinfo *, int)); |
| 404 | |
| 405 | static void |
| 406 | info_proc_mappings PARAMS ((struct procinfo *, int)); |
| 407 | |
| 408 | static void |
| 409 | info_proc_signals PARAMS ((struct procinfo *, int)); |
| 410 | |
| 411 | static void |
| 412 | info_proc_faults PARAMS ((struct procinfo *, int)); |
| 413 | |
| 414 | static char * |
| 415 | mappingflags PARAMS ((long)); |
| 416 | |
| 417 | static char * |
| 418 | lookupname PARAMS ((struct trans *, unsigned int, char *)); |
| 419 | |
| 420 | static char * |
| 421 | lookupdesc PARAMS ((struct trans *, unsigned int)); |
| 422 | |
| 423 | static int |
| 424 | do_attach PARAMS ((int pid)); |
| 425 | |
| 426 | static void |
| 427 | do_detach PARAMS ((int siggnal)); |
| 428 | |
| 429 | static void |
| 430 | procfs_create_inferior PARAMS ((char *, char *, char **)); |
| 431 | |
| 432 | static void |
| 433 | procfs_notice_signals PARAMS ((int pid)); |
| 434 | |
| 435 | static struct procinfo * |
| 436 | find_procinfo PARAMS ((pid_t pid, int okfail)); |
| 437 | |
| 438 | /* External function prototypes that can't be easily included in any |
| 439 | header file because the args are typedefs in system include files. */ |
| 440 | |
| 441 | extern void |
| 442 | supply_gregset PARAMS ((gregset_t *)); |
| 443 | |
| 444 | extern void |
| 445 | fill_gregset PARAMS ((gregset_t *, int)); |
| 446 | |
| 447 | extern void |
| 448 | supply_fpregset PARAMS ((fpregset_t *)); |
| 449 | |
| 450 | extern void |
| 451 | fill_fpregset PARAMS ((fpregset_t *, int)); |
| 452 | |
| 453 | /* |
| 454 | |
| 455 | LOCAL FUNCTION |
| 456 | |
| 457 | find_procinfo -- convert a process id to a struct procinfo |
| 458 | |
| 459 | SYNOPSIS |
| 460 | |
| 461 | static struct procinfo * find_procinfo (pid_t pid, int okfail); |
| 462 | |
| 463 | DESCRIPTION |
| 464 | |
| 465 | Given a process id, look it up in the procinfo chain. Returns |
| 466 | a struct procinfo *. If can't find pid, then call error(), |
| 467 | unless okfail is set, in which case, return NULL; |
| 468 | */ |
| 469 | |
| 470 | static struct procinfo * |
| 471 | find_procinfo (pid, okfail) |
| 472 | pid_t pid; |
| 473 | int okfail; |
| 474 | { |
| 475 | struct procinfo *procinfo; |
| 476 | |
| 477 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 478 | if (procinfo->pid == pid) |
| 479 | return procinfo; |
| 480 | |
| 481 | if (okfail) |
| 482 | return NULL; |
| 483 | |
| 484 | error ("procfs (find_procinfo): Couldn't locate pid %d", pid); |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | |
| 489 | LOCAL MACRO |
| 490 | |
| 491 | current_procinfo -- convert inferior_pid to a struct procinfo |
| 492 | |
| 493 | SYNOPSIS |
| 494 | |
| 495 | static struct procinfo * current_procinfo; |
| 496 | |
| 497 | DESCRIPTION |
| 498 | |
| 499 | Looks up inferior_pid in the procinfo chain. Always returns a |
| 500 | struct procinfo *. If process can't be found, we error() out. |
| 501 | */ |
| 502 | |
| 503 | #define current_procinfo find_procinfo (inferior_pid, 0) |
| 504 | |
| 505 | /* |
| 506 | |
| 507 | LOCAL FUNCTION |
| 508 | |
| 509 | add_fd -- Add the fd to the poll/select list |
| 510 | |
| 511 | SYNOPSIS |
| 512 | |
| 513 | static void add_fd (struct procinfo *); |
| 514 | |
| 515 | DESCRIPTION |
| 516 | |
| 517 | Add the fd of the supplied procinfo to the list of fds used for |
| 518 | poll/select operations. |
| 519 | */ |
| 520 | |
| 521 | static void |
| 522 | add_fd (pi) |
| 523 | struct procinfo *pi; |
| 524 | { |
| 525 | if (num_poll_list <= 0) |
| 526 | poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd)); |
| 527 | else |
| 528 | poll_list = (struct pollfd *) xrealloc (poll_list, |
| 529 | (num_poll_list + 1) |
| 530 | * sizeof (struct pollfd)); |
| 531 | poll_list[num_poll_list].fd = pi->fd; |
| 532 | poll_list[num_poll_list].events = POLLPRI; |
| 533 | |
| 534 | num_poll_list++; |
| 535 | } |
| 536 | |
| 537 | static void |
| 538 | remove_fd (pi) |
| 539 | struct procinfo *pi; |
| 540 | { |
| 541 | int i; |
| 542 | |
| 543 | for (i = 0; i < num_poll_list; i++) |
| 544 | { |
| 545 | if (poll_list[i].fd == pi->fd) |
| 546 | { |
| 547 | if (i != num_poll_list - 1) |
| 548 | memcpy (poll_list, poll_list + i + 1, |
| 549 | (num_poll_list - i - 1) * sizeof (struct pollfd)); |
| 550 | |
| 551 | num_poll_list--; |
| 552 | |
| 553 | if (num_poll_list == 0) |
| 554 | free (poll_list); |
| 555 | else |
| 556 | poll_list = (struct pollfd *) xrealloc (poll_list, |
| 557 | num_poll_list |
| 558 | * sizeof (struct pollfd)); |
| 559 | return; |
| 560 | } |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | #define LOSING_POLL unixware_sux |
| 565 | |
| 566 | static struct procinfo * |
| 567 | wait_fd () |
| 568 | { |
| 569 | struct procinfo *pi; |
| 570 | int num_fds; |
| 571 | int i; |
| 572 | |
| 573 | if (attach_flag) |
| 574 | set_sigint_trap (); /* Causes SIGINT to be passed on to the |
| 575 | attached process. */ |
| 576 | |
| 577 | #ifndef LOSING_POLL |
| 578 | num_fds = poll (poll_list, num_poll_list, -1); |
| 579 | #else |
| 580 | pi = current_procinfo; |
| 581 | |
| 582 | if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) |
| 583 | { |
| 584 | print_sys_errmsg (pi->pathname, errno); |
| 585 | error ("PIOCWSTOP failed"); |
| 586 | } |
| 587 | pi->had_event = 1; |
| 588 | #endif |
| 589 | |
| 590 | if (attach_flag) |
| 591 | clear_sigint_trap(); |
| 592 | |
| 593 | #ifndef LOSING_POLL |
| 594 | |
| 595 | if (num_fds <= 0) |
| 596 | { |
| 597 | print_sys_errmsg ("poll failed\n", errno); |
| 598 | error ("Poll failed, returned %d", num_fds); |
| 599 | } |
| 600 | |
| 601 | for (i = 0; i < num_poll_list && num_fds > 0; i++) |
| 602 | { |
| 603 | if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0) |
| 604 | continue; |
| 605 | for (pi = procinfo_list; pi; pi = pi->next) |
| 606 | { |
| 607 | if (poll_list[i].fd == pi->fd) |
| 608 | { |
| 609 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
| 610 | { |
| 611 | print_sys_errmsg (pi->pathname, errno); |
| 612 | error ("PIOCSTATUS failed"); |
| 613 | } |
| 614 | num_fds--; |
| 615 | pi->had_event = 1; |
| 616 | break; |
| 617 | } |
| 618 | } |
| 619 | if (!pi) |
| 620 | error ("procfs_wait: Couldn't find procinfo for fd %d\n", |
| 621 | poll_list[i].fd); |
| 622 | } |
| 623 | #endif /* LOSING_POLL */ |
| 624 | |
| 625 | return pi; |
| 626 | } |
| 627 | |
| 628 | /* |
| 629 | |
| 630 | LOCAL FUNCTION |
| 631 | |
| 632 | lookupdesc -- translate a value to a summary desc string |
| 633 | |
| 634 | SYNOPSIS |
| 635 | |
| 636 | static char *lookupdesc (struct trans *transp, unsigned int val); |
| 637 | |
| 638 | DESCRIPTION |
| 639 | |
| 640 | Given a pointer to a translation table and a value to be translated, |
| 641 | lookup the desc string and return it. |
| 642 | */ |
| 643 | |
| 644 | static char * |
| 645 | lookupdesc (transp, val) |
| 646 | struct trans *transp; |
| 647 | unsigned int val; |
| 648 | { |
| 649 | char *desc; |
| 650 | |
| 651 | for (desc = NULL; transp -> name != NULL; transp++) |
| 652 | { |
| 653 | if (transp -> value == val) |
| 654 | { |
| 655 | desc = transp -> desc; |
| 656 | break; |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | /* Didn't find a translation for the specified value, set a default one. */ |
| 661 | |
| 662 | if (desc == NULL) |
| 663 | { |
| 664 | desc = "Unknown"; |
| 665 | } |
| 666 | return (desc); |
| 667 | } |
| 668 | |
| 669 | /* |
| 670 | |
| 671 | LOCAL FUNCTION |
| 672 | |
| 673 | lookupname -- translate a value to symbolic name |
| 674 | |
| 675 | SYNOPSIS |
| 676 | |
| 677 | static char *lookupname (struct trans *transp, unsigned int val, |
| 678 | char *prefix); |
| 679 | |
| 680 | DESCRIPTION |
| 681 | |
| 682 | Given a pointer to a translation table, a value to be translated, |
| 683 | and a default prefix to return if the value can't be translated, |
| 684 | match the value with one of the translation table entries and |
| 685 | return a pointer to the symbolic name. |
| 686 | |
| 687 | If no match is found it just returns the value as a printable string, |
| 688 | with the given prefix. The previous such value, if any, is freed |
| 689 | at this time. |
| 690 | */ |
| 691 | |
| 692 | static char * |
| 693 | lookupname (transp, val, prefix) |
| 694 | struct trans *transp; |
| 695 | unsigned int val; |
| 696 | char *prefix; |
| 697 | { |
| 698 | static char *locbuf; |
| 699 | char *name; |
| 700 | |
| 701 | for (name = NULL; transp -> name != NULL; transp++) |
| 702 | { |
| 703 | if (transp -> value == val) |
| 704 | { |
| 705 | name = transp -> name; |
| 706 | break; |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | /* Didn't find a translation for the specified value, build a default |
| 711 | one using the specified prefix and return it. The lifetime of |
| 712 | the value is only until the next one is needed. */ |
| 713 | |
| 714 | if (name == NULL) |
| 715 | { |
| 716 | if (locbuf != NULL) |
| 717 | { |
| 718 | free (locbuf); |
| 719 | } |
| 720 | locbuf = xmalloc (strlen (prefix) + 16); |
| 721 | sprintf (locbuf, "%s %u", prefix, val); |
| 722 | name = locbuf; |
| 723 | } |
| 724 | return (name); |
| 725 | } |
| 726 | |
| 727 | static char * |
| 728 | sigcodename (sip) |
| 729 | siginfo_t *sip; |
| 730 | { |
| 731 | struct sigcode *scp; |
| 732 | char *name = NULL; |
| 733 | static char locbuf[32]; |
| 734 | |
| 735 | for (scp = siginfo_table; scp -> codename != NULL; scp++) |
| 736 | { |
| 737 | if ((scp -> signo == sip -> si_signo) && |
| 738 | (scp -> code == sip -> si_code)) |
| 739 | { |
| 740 | name = scp -> codename; |
| 741 | break; |
| 742 | } |
| 743 | } |
| 744 | if (name == NULL) |
| 745 | { |
| 746 | sprintf (locbuf, "sigcode %u", sip -> si_signo); |
| 747 | name = locbuf; |
| 748 | } |
| 749 | return (name); |
| 750 | } |
| 751 | |
| 752 | static char * |
| 753 | sigcodedesc (sip) |
| 754 | siginfo_t *sip; |
| 755 | { |
| 756 | struct sigcode *scp; |
| 757 | char *desc = NULL; |
| 758 | |
| 759 | for (scp = siginfo_table; scp -> codename != NULL; scp++) |
| 760 | { |
| 761 | if ((scp -> signo == sip -> si_signo) && |
| 762 | (scp -> code == sip -> si_code)) |
| 763 | { |
| 764 | desc = scp -> desc; |
| 765 | break; |
| 766 | } |
| 767 | } |
| 768 | if (desc == NULL) |
| 769 | { |
| 770 | desc = "Unrecognized signal or trap use"; |
| 771 | } |
| 772 | return (desc); |
| 773 | } |
| 774 | |
| 775 | /* |
| 776 | |
| 777 | LOCAL FUNCTION |
| 778 | |
| 779 | syscallname - translate a system call number into a system call name |
| 780 | |
| 781 | SYNOPSIS |
| 782 | |
| 783 | char *syscallname (int syscallnum) |
| 784 | |
| 785 | DESCRIPTION |
| 786 | |
| 787 | Given a system call number, translate it into the printable name |
| 788 | of a system call, or into "syscall <num>" if it is an unknown |
| 789 | number. |
| 790 | */ |
| 791 | |
| 792 | static char * |
| 793 | syscallname (syscallnum) |
| 794 | int syscallnum; |
| 795 | { |
| 796 | static char locbuf[32]; |
| 797 | char *rtnval; |
| 798 | |
| 799 | if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS) |
| 800 | { |
| 801 | rtnval = syscall_table[syscallnum]; |
| 802 | } |
| 803 | else |
| 804 | { |
| 805 | sprintf (locbuf, "syscall %u", syscallnum); |
| 806 | rtnval = locbuf; |
| 807 | } |
| 808 | return (rtnval); |
| 809 | } |
| 810 | |
| 811 | /* |
| 812 | |
| 813 | LOCAL FUNCTION |
| 814 | |
| 815 | init_syscall_table - initialize syscall translation table |
| 816 | |
| 817 | SYNOPSIS |
| 818 | |
| 819 | void init_syscall_table (void) |
| 820 | |
| 821 | DESCRIPTION |
| 822 | |
| 823 | Dynamically initialize the translation table to convert system |
| 824 | call numbers into printable system call names. Done once per |
| 825 | gdb run, on initialization. |
| 826 | |
| 827 | NOTES |
| 828 | |
| 829 | This is awfully ugly, but preprocessor tricks to make it prettier |
| 830 | tend to be nonportable. |
| 831 | */ |
| 832 | |
| 833 | static void |
| 834 | init_syscall_table () |
| 835 | { |
| 836 | #if defined (SYS_exit) |
| 837 | syscall_table[SYS_exit] = "exit"; |
| 838 | #endif |
| 839 | #if defined (SYS_fork) |
| 840 | syscall_table[SYS_fork] = "fork"; |
| 841 | #endif |
| 842 | #if defined (SYS_read) |
| 843 | syscall_table[SYS_read] = "read"; |
| 844 | #endif |
| 845 | #if defined (SYS_write) |
| 846 | syscall_table[SYS_write] = "write"; |
| 847 | #endif |
| 848 | #if defined (SYS_open) |
| 849 | syscall_table[SYS_open] = "open"; |
| 850 | #endif |
| 851 | #if defined (SYS_close) |
| 852 | syscall_table[SYS_close] = "close"; |
| 853 | #endif |
| 854 | #if defined (SYS_wait) |
| 855 | syscall_table[SYS_wait] = "wait"; |
| 856 | #endif |
| 857 | #if defined (SYS_creat) |
| 858 | syscall_table[SYS_creat] = "creat"; |
| 859 | #endif |
| 860 | #if defined (SYS_link) |
| 861 | syscall_table[SYS_link] = "link"; |
| 862 | #endif |
| 863 | #if defined (SYS_unlink) |
| 864 | syscall_table[SYS_unlink] = "unlink"; |
| 865 | #endif |
| 866 | #if defined (SYS_exec) |
| 867 | syscall_table[SYS_exec] = "exec"; |
| 868 | #endif |
| 869 | #if defined (SYS_execv) |
| 870 | syscall_table[SYS_execv] = "execv"; |
| 871 | #endif |
| 872 | #if defined (SYS_execve) |
| 873 | syscall_table[SYS_execve] = "execve"; |
| 874 | #endif |
| 875 | #if defined (SYS_chdir) |
| 876 | syscall_table[SYS_chdir] = "chdir"; |
| 877 | #endif |
| 878 | #if defined (SYS_time) |
| 879 | syscall_table[SYS_time] = "time"; |
| 880 | #endif |
| 881 | #if defined (SYS_mknod) |
| 882 | syscall_table[SYS_mknod] = "mknod"; |
| 883 | #endif |
| 884 | #if defined (SYS_chmod) |
| 885 | syscall_table[SYS_chmod] = "chmod"; |
| 886 | #endif |
| 887 | #if defined (SYS_chown) |
| 888 | syscall_table[SYS_chown] = "chown"; |
| 889 | #endif |
| 890 | #if defined (SYS_brk) |
| 891 | syscall_table[SYS_brk] = "brk"; |
| 892 | #endif |
| 893 | #if defined (SYS_stat) |
| 894 | syscall_table[SYS_stat] = "stat"; |
| 895 | #endif |
| 896 | #if defined (SYS_lseek) |
| 897 | syscall_table[SYS_lseek] = "lseek"; |
| 898 | #endif |
| 899 | #if defined (SYS_getpid) |
| 900 | syscall_table[SYS_getpid] = "getpid"; |
| 901 | #endif |
| 902 | #if defined (SYS_mount) |
| 903 | syscall_table[SYS_mount] = "mount"; |
| 904 | #endif |
| 905 | #if defined (SYS_umount) |
| 906 | syscall_table[SYS_umount] = "umount"; |
| 907 | #endif |
| 908 | #if defined (SYS_setuid) |
| 909 | syscall_table[SYS_setuid] = "setuid"; |
| 910 | #endif |
| 911 | #if defined (SYS_getuid) |
| 912 | syscall_table[SYS_getuid] = "getuid"; |
| 913 | #endif |
| 914 | #if defined (SYS_stime) |
| 915 | syscall_table[SYS_stime] = "stime"; |
| 916 | #endif |
| 917 | #if defined (SYS_ptrace) |
| 918 | syscall_table[SYS_ptrace] = "ptrace"; |
| 919 | #endif |
| 920 | #if defined (SYS_alarm) |
| 921 | syscall_table[SYS_alarm] = "alarm"; |
| 922 | #endif |
| 923 | #if defined (SYS_fstat) |
| 924 | syscall_table[SYS_fstat] = "fstat"; |
| 925 | #endif |
| 926 | #if defined (SYS_pause) |
| 927 | syscall_table[SYS_pause] = "pause"; |
| 928 | #endif |
| 929 | #if defined (SYS_utime) |
| 930 | syscall_table[SYS_utime] = "utime"; |
| 931 | #endif |
| 932 | #if defined (SYS_stty) |
| 933 | syscall_table[SYS_stty] = "stty"; |
| 934 | #endif |
| 935 | #if defined (SYS_gtty) |
| 936 | syscall_table[SYS_gtty] = "gtty"; |
| 937 | #endif |
| 938 | #if defined (SYS_access) |
| 939 | syscall_table[SYS_access] = "access"; |
| 940 | #endif |
| 941 | #if defined (SYS_nice) |
| 942 | syscall_table[SYS_nice] = "nice"; |
| 943 | #endif |
| 944 | #if defined (SYS_statfs) |
| 945 | syscall_table[SYS_statfs] = "statfs"; |
| 946 | #endif |
| 947 | #if defined (SYS_sync) |
| 948 | syscall_table[SYS_sync] = "sync"; |
| 949 | #endif |
| 950 | #if defined (SYS_kill) |
| 951 | syscall_table[SYS_kill] = "kill"; |
| 952 | #endif |
| 953 | #if defined (SYS_fstatfs) |
| 954 | syscall_table[SYS_fstatfs] = "fstatfs"; |
| 955 | #endif |
| 956 | #if defined (SYS_pgrpsys) |
| 957 | syscall_table[SYS_pgrpsys] = "pgrpsys"; |
| 958 | #endif |
| 959 | #if defined (SYS_xenix) |
| 960 | syscall_table[SYS_xenix] = "xenix"; |
| 961 | #endif |
| 962 | #if defined (SYS_dup) |
| 963 | syscall_table[SYS_dup] = "dup"; |
| 964 | #endif |
| 965 | #if defined (SYS_pipe) |
| 966 | syscall_table[SYS_pipe] = "pipe"; |
| 967 | #endif |
| 968 | #if defined (SYS_times) |
| 969 | syscall_table[SYS_times] = "times"; |
| 970 | #endif |
| 971 | #if defined (SYS_profil) |
| 972 | syscall_table[SYS_profil] = "profil"; |
| 973 | #endif |
| 974 | #if defined (SYS_plock) |
| 975 | syscall_table[SYS_plock] = "plock"; |
| 976 | #endif |
| 977 | #if defined (SYS_setgid) |
| 978 | syscall_table[SYS_setgid] = "setgid"; |
| 979 | #endif |
| 980 | #if defined (SYS_getgid) |
| 981 | syscall_table[SYS_getgid] = "getgid"; |
| 982 | #endif |
| 983 | #if defined (SYS_signal) |
| 984 | syscall_table[SYS_signal] = "signal"; |
| 985 | #endif |
| 986 | #if defined (SYS_msgsys) |
| 987 | syscall_table[SYS_msgsys] = "msgsys"; |
| 988 | #endif |
| 989 | #if defined (SYS_sys3b) |
| 990 | syscall_table[SYS_sys3b] = "sys3b"; |
| 991 | #endif |
| 992 | #if defined (SYS_acct) |
| 993 | syscall_table[SYS_acct] = "acct"; |
| 994 | #endif |
| 995 | #if defined (SYS_shmsys) |
| 996 | syscall_table[SYS_shmsys] = "shmsys"; |
| 997 | #endif |
| 998 | #if defined (SYS_semsys) |
| 999 | syscall_table[SYS_semsys] = "semsys"; |
| 1000 | #endif |
| 1001 | #if defined (SYS_ioctl) |
| 1002 | syscall_table[SYS_ioctl] = "ioctl"; |
| 1003 | #endif |
| 1004 | #if defined (SYS_uadmin) |
| 1005 | syscall_table[SYS_uadmin] = "uadmin"; |
| 1006 | #endif |
| 1007 | #if defined (SYS_utssys) |
| 1008 | syscall_table[SYS_utssys] = "utssys"; |
| 1009 | #endif |
| 1010 | #if defined (SYS_fsync) |
| 1011 | syscall_table[SYS_fsync] = "fsync"; |
| 1012 | #endif |
| 1013 | #if defined (SYS_umask) |
| 1014 | syscall_table[SYS_umask] = "umask"; |
| 1015 | #endif |
| 1016 | #if defined (SYS_chroot) |
| 1017 | syscall_table[SYS_chroot] = "chroot"; |
| 1018 | #endif |
| 1019 | #if defined (SYS_fcntl) |
| 1020 | syscall_table[SYS_fcntl] = "fcntl"; |
| 1021 | #endif |
| 1022 | #if defined (SYS_ulimit) |
| 1023 | syscall_table[SYS_ulimit] = "ulimit"; |
| 1024 | #endif |
| 1025 | #if defined (SYS_rfsys) |
| 1026 | syscall_table[SYS_rfsys] = "rfsys"; |
| 1027 | #endif |
| 1028 | #if defined (SYS_rmdir) |
| 1029 | syscall_table[SYS_rmdir] = "rmdir"; |
| 1030 | #endif |
| 1031 | #if defined (SYS_mkdir) |
| 1032 | syscall_table[SYS_mkdir] = "mkdir"; |
| 1033 | #endif |
| 1034 | #if defined (SYS_getdents) |
| 1035 | syscall_table[SYS_getdents] = "getdents"; |
| 1036 | #endif |
| 1037 | #if defined (SYS_sysfs) |
| 1038 | syscall_table[SYS_sysfs] = "sysfs"; |
| 1039 | #endif |
| 1040 | #if defined (SYS_getmsg) |
| 1041 | syscall_table[SYS_getmsg] = "getmsg"; |
| 1042 | #endif |
| 1043 | #if defined (SYS_putmsg) |
| 1044 | syscall_table[SYS_putmsg] = "putmsg"; |
| 1045 | #endif |
| 1046 | #if defined (SYS_poll) |
| 1047 | syscall_table[SYS_poll] = "poll"; |
| 1048 | #endif |
| 1049 | #if defined (SYS_lstat) |
| 1050 | syscall_table[SYS_lstat] = "lstat"; |
| 1051 | #endif |
| 1052 | #if defined (SYS_symlink) |
| 1053 | syscall_table[SYS_symlink] = "symlink"; |
| 1054 | #endif |
| 1055 | #if defined (SYS_readlink) |
| 1056 | syscall_table[SYS_readlink] = "readlink"; |
| 1057 | #endif |
| 1058 | #if defined (SYS_setgroups) |
| 1059 | syscall_table[SYS_setgroups] = "setgroups"; |
| 1060 | #endif |
| 1061 | #if defined (SYS_getgroups) |
| 1062 | syscall_table[SYS_getgroups] = "getgroups"; |
| 1063 | #endif |
| 1064 | #if defined (SYS_fchmod) |
| 1065 | syscall_table[SYS_fchmod] = "fchmod"; |
| 1066 | #endif |
| 1067 | #if defined (SYS_fchown) |
| 1068 | syscall_table[SYS_fchown] = "fchown"; |
| 1069 | #endif |
| 1070 | #if defined (SYS_sigprocmask) |
| 1071 | syscall_table[SYS_sigprocmask] = "sigprocmask"; |
| 1072 | #endif |
| 1073 | #if defined (SYS_sigsuspend) |
| 1074 | syscall_table[SYS_sigsuspend] = "sigsuspend"; |
| 1075 | #endif |
| 1076 | #if defined (SYS_sigaltstack) |
| 1077 | syscall_table[SYS_sigaltstack] = "sigaltstack"; |
| 1078 | #endif |
| 1079 | #if defined (SYS_sigaction) |
| 1080 | syscall_table[SYS_sigaction] = "sigaction"; |
| 1081 | #endif |
| 1082 | #if defined (SYS_sigpending) |
| 1083 | syscall_table[SYS_sigpending] = "sigpending"; |
| 1084 | #endif |
| 1085 | #if defined (SYS_context) |
| 1086 | syscall_table[SYS_context] = "context"; |
| 1087 | #endif |
| 1088 | #if defined (SYS_evsys) |
| 1089 | syscall_table[SYS_evsys] = "evsys"; |
| 1090 | #endif |
| 1091 | #if defined (SYS_evtrapret) |
| 1092 | syscall_table[SYS_evtrapret] = "evtrapret"; |
| 1093 | #endif |
| 1094 | #if defined (SYS_statvfs) |
| 1095 | syscall_table[SYS_statvfs] = "statvfs"; |
| 1096 | #endif |
| 1097 | #if defined (SYS_fstatvfs) |
| 1098 | syscall_table[SYS_fstatvfs] = "fstatvfs"; |
| 1099 | #endif |
| 1100 | #if defined (SYS_nfssys) |
| 1101 | syscall_table[SYS_nfssys] = "nfssys"; |
| 1102 | #endif |
| 1103 | #if defined (SYS_waitsys) |
| 1104 | syscall_table[SYS_waitsys] = "waitsys"; |
| 1105 | #endif |
| 1106 | #if defined (SYS_sigsendsys) |
| 1107 | syscall_table[SYS_sigsendsys] = "sigsendsys"; |
| 1108 | #endif |
| 1109 | #if defined (SYS_hrtsys) |
| 1110 | syscall_table[SYS_hrtsys] = "hrtsys"; |
| 1111 | #endif |
| 1112 | #if defined (SYS_acancel) |
| 1113 | syscall_table[SYS_acancel] = "acancel"; |
| 1114 | #endif |
| 1115 | #if defined (SYS_async) |
| 1116 | syscall_table[SYS_async] = "async"; |
| 1117 | #endif |
| 1118 | #if defined (SYS_priocntlsys) |
| 1119 | syscall_table[SYS_priocntlsys] = "priocntlsys"; |
| 1120 | #endif |
| 1121 | #if defined (SYS_pathconf) |
| 1122 | syscall_table[SYS_pathconf] = "pathconf"; |
| 1123 | #endif |
| 1124 | #if defined (SYS_mincore) |
| 1125 | syscall_table[SYS_mincore] = "mincore"; |
| 1126 | #endif |
| 1127 | #if defined (SYS_mmap) |
| 1128 | syscall_table[SYS_mmap] = "mmap"; |
| 1129 | #endif |
| 1130 | #if defined (SYS_mprotect) |
| 1131 | syscall_table[SYS_mprotect] = "mprotect"; |
| 1132 | #endif |
| 1133 | #if defined (SYS_munmap) |
| 1134 | syscall_table[SYS_munmap] = "munmap"; |
| 1135 | #endif |
| 1136 | #if defined (SYS_fpathconf) |
| 1137 | syscall_table[SYS_fpathconf] = "fpathconf"; |
| 1138 | #endif |
| 1139 | #if defined (SYS_vfork) |
| 1140 | syscall_table[SYS_vfork] = "vfork"; |
| 1141 | #endif |
| 1142 | #if defined (SYS_fchdir) |
| 1143 | syscall_table[SYS_fchdir] = "fchdir"; |
| 1144 | #endif |
| 1145 | #if defined (SYS_readv) |
| 1146 | syscall_table[SYS_readv] = "readv"; |
| 1147 | #endif |
| 1148 | #if defined (SYS_writev) |
| 1149 | syscall_table[SYS_writev] = "writev"; |
| 1150 | #endif |
| 1151 | #if defined (SYS_xstat) |
| 1152 | syscall_table[SYS_xstat] = "xstat"; |
| 1153 | #endif |
| 1154 | #if defined (SYS_lxstat) |
| 1155 | syscall_table[SYS_lxstat] = "lxstat"; |
| 1156 | #endif |
| 1157 | #if defined (SYS_fxstat) |
| 1158 | syscall_table[SYS_fxstat] = "fxstat"; |
| 1159 | #endif |
| 1160 | #if defined (SYS_xmknod) |
| 1161 | syscall_table[SYS_xmknod] = "xmknod"; |
| 1162 | #endif |
| 1163 | #if defined (SYS_clocal) |
| 1164 | syscall_table[SYS_clocal] = "clocal"; |
| 1165 | #endif |
| 1166 | #if defined (SYS_setrlimit) |
| 1167 | syscall_table[SYS_setrlimit] = "setrlimit"; |
| 1168 | #endif |
| 1169 | #if defined (SYS_getrlimit) |
| 1170 | syscall_table[SYS_getrlimit] = "getrlimit"; |
| 1171 | #endif |
| 1172 | #if defined (SYS_lchown) |
| 1173 | syscall_table[SYS_lchown] = "lchown"; |
| 1174 | #endif |
| 1175 | #if defined (SYS_memcntl) |
| 1176 | syscall_table[SYS_memcntl] = "memcntl"; |
| 1177 | #endif |
| 1178 | #if defined (SYS_getpmsg) |
| 1179 | syscall_table[SYS_getpmsg] = "getpmsg"; |
| 1180 | #endif |
| 1181 | #if defined (SYS_putpmsg) |
| 1182 | syscall_table[SYS_putpmsg] = "putpmsg"; |
| 1183 | #endif |
| 1184 | #if defined (SYS_rename) |
| 1185 | syscall_table[SYS_rename] = "rename"; |
| 1186 | #endif |
| 1187 | #if defined (SYS_uname) |
| 1188 | syscall_table[SYS_uname] = "uname"; |
| 1189 | #endif |
| 1190 | #if defined (SYS_setegid) |
| 1191 | syscall_table[SYS_setegid] = "setegid"; |
| 1192 | #endif |
| 1193 | #if defined (SYS_sysconfig) |
| 1194 | syscall_table[SYS_sysconfig] = "sysconfig"; |
| 1195 | #endif |
| 1196 | #if defined (SYS_adjtime) |
| 1197 | syscall_table[SYS_adjtime] = "adjtime"; |
| 1198 | #endif |
| 1199 | #if defined (SYS_systeminfo) |
| 1200 | syscall_table[SYS_systeminfo] = "systeminfo"; |
| 1201 | #endif |
| 1202 | #if defined (SYS_seteuid) |
| 1203 | syscall_table[SYS_seteuid] = "seteuid"; |
| 1204 | #endif |
| 1205 | #if defined (SYS_sproc) |
| 1206 | syscall_table[SYS_sproc] = "sproc"; |
| 1207 | #endif |
| 1208 | } |
| 1209 | |
| 1210 | /* |
| 1211 | |
| 1212 | LOCAL FUNCTION |
| 1213 | |
| 1214 | procfs_kill_inferior - kill any currently inferior |
| 1215 | |
| 1216 | SYNOPSIS |
| 1217 | |
| 1218 | void procfs_kill_inferior (void) |
| 1219 | |
| 1220 | DESCRIPTION |
| 1221 | |
| 1222 | Kill any current inferior. |
| 1223 | |
| 1224 | NOTES |
| 1225 | |
| 1226 | Kills even attached inferiors. Presumably the user has already |
| 1227 | been prompted that the inferior is an attached one rather than |
| 1228 | one started by gdb. (FIXME?) |
| 1229 | |
| 1230 | */ |
| 1231 | |
| 1232 | static void |
| 1233 | procfs_kill_inferior () |
| 1234 | { |
| 1235 | target_mourn_inferior (); |
| 1236 | } |
| 1237 | |
| 1238 | /* |
| 1239 | |
| 1240 | LOCAL FUNCTION |
| 1241 | |
| 1242 | unconditionally_kill_inferior - terminate the inferior |
| 1243 | |
| 1244 | SYNOPSIS |
| 1245 | |
| 1246 | static void unconditionally_kill_inferior (struct procinfo *) |
| 1247 | |
| 1248 | DESCRIPTION |
| 1249 | |
| 1250 | Kill the specified inferior. |
| 1251 | |
| 1252 | NOTE |
| 1253 | |
| 1254 | A possibly useful enhancement would be to first try sending |
| 1255 | the inferior a terminate signal, politely asking it to commit |
| 1256 | suicide, before we murder it (we could call that |
| 1257 | politely_kill_inferior()). |
| 1258 | |
| 1259 | */ |
| 1260 | |
| 1261 | static void |
| 1262 | unconditionally_kill_inferior (pi) |
| 1263 | struct procinfo *pi; |
| 1264 | { |
| 1265 | int signo; |
| 1266 | int ppid; |
| 1267 | |
| 1268 | ppid = pi->prstatus.pr_ppid; |
| 1269 | |
| 1270 | signo = SIGKILL; |
| 1271 | ioctl (pi->fd, PIOCKILL, &signo); |
| 1272 | close_proc_file (pi); |
| 1273 | |
| 1274 | /* Only wait() for our direct children. Our grandchildren zombies are killed |
| 1275 | by the death of their parents. */ |
| 1276 | |
| 1277 | if (ppid == getpid()) |
| 1278 | wait ((int *) 0); |
| 1279 | } |
| 1280 | |
| 1281 | /* |
| 1282 | |
| 1283 | LOCAL FUNCTION |
| 1284 | |
| 1285 | procfs_xfer_memory -- copy data to or from inferior memory space |
| 1286 | |
| 1287 | SYNOPSIS |
| 1288 | |
| 1289 | int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, |
| 1290 | int dowrite, struct target_ops target) |
| 1291 | |
| 1292 | DESCRIPTION |
| 1293 | |
| 1294 | Copy LEN bytes to/from inferior's memory starting at MEMADDR |
| 1295 | from/to debugger memory starting at MYADDR. Copy from inferior |
| 1296 | if DOWRITE is zero or to inferior if DOWRITE is nonzero. |
| 1297 | |
| 1298 | Returns the length copied, which is either the LEN argument or |
| 1299 | zero. This xfer function does not do partial moves, since procfs_ops |
| 1300 | doesn't allow memory operations to cross below us in the target stack |
| 1301 | anyway. |
| 1302 | |
| 1303 | NOTES |
| 1304 | |
| 1305 | The /proc interface makes this an almost trivial task. |
| 1306 | */ |
| 1307 | |
| 1308 | static int |
| 1309 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) |
| 1310 | CORE_ADDR memaddr; |
| 1311 | char *myaddr; |
| 1312 | int len; |
| 1313 | int dowrite; |
| 1314 | struct target_ops *target; /* ignored */ |
| 1315 | { |
| 1316 | int nbytes = 0; |
| 1317 | struct procinfo *pi; |
| 1318 | |
| 1319 | pi = current_procinfo; |
| 1320 | |
| 1321 | if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr) |
| 1322 | { |
| 1323 | if (dowrite) |
| 1324 | { |
| 1325 | nbytes = write (pi->fd, myaddr, len); |
| 1326 | } |
| 1327 | else |
| 1328 | { |
| 1329 | nbytes = read (pi->fd, myaddr, len); |
| 1330 | } |
| 1331 | if (nbytes < 0) |
| 1332 | { |
| 1333 | nbytes = 0; |
| 1334 | } |
| 1335 | } |
| 1336 | return (nbytes); |
| 1337 | } |
| 1338 | |
| 1339 | /* |
| 1340 | |
| 1341 | LOCAL FUNCTION |
| 1342 | |
| 1343 | procfs_store_registers -- copy register values back to inferior |
| 1344 | |
| 1345 | SYNOPSIS |
| 1346 | |
| 1347 | void procfs_store_registers (int regno) |
| 1348 | |
| 1349 | DESCRIPTION |
| 1350 | |
| 1351 | Store our current register values back into the inferior. If |
| 1352 | REGNO is -1 then store all the register, otherwise store just |
| 1353 | the value specified by REGNO. |
| 1354 | |
| 1355 | NOTES |
| 1356 | |
| 1357 | If we are storing only a single register, we first have to get all |
| 1358 | the current values from the process, overwrite the desired register |
| 1359 | in the gregset with the one we want from gdb's registers, and then |
| 1360 | send the whole set back to the process. For writing all the |
| 1361 | registers, all we have to do is generate the gregset and send it to |
| 1362 | the process. |
| 1363 | |
| 1364 | Also note that the process has to be stopped on an event of interest |
| 1365 | for this to work, which basically means that it has to have been |
| 1366 | run under the control of one of the other /proc ioctl calls and not |
| 1367 | ptrace. Since we don't use ptrace anyway, we don't worry about this |
| 1368 | fine point, but it is worth noting for future reference. |
| 1369 | |
| 1370 | Gdb is confused about what this function is supposed to return. |
| 1371 | Some versions return a value, others return nothing. Some are |
| 1372 | declared to return a value and actually return nothing. Gdb ignores |
| 1373 | anything returned. (FIXME) |
| 1374 | |
| 1375 | */ |
| 1376 | |
| 1377 | static void |
| 1378 | procfs_store_registers (regno) |
| 1379 | int regno; |
| 1380 | { |
| 1381 | struct procinfo *pi; |
| 1382 | |
| 1383 | pi = current_procinfo; |
| 1384 | |
| 1385 | if (regno != -1) |
| 1386 | { |
| 1387 | ioctl (pi->fd, PIOCGREG, &pi->gregset); |
| 1388 | } |
| 1389 | fill_gregset (&pi->gregset, regno); |
| 1390 | ioctl (pi->fd, PIOCSREG, &pi->gregset); |
| 1391 | |
| 1392 | #if defined (FP0_REGNUM) |
| 1393 | |
| 1394 | /* Now repeat everything using the floating point register set, if the |
| 1395 | target has floating point hardware. Since we ignore the returned value, |
| 1396 | we'll never know whether it worked or not anyway. */ |
| 1397 | |
| 1398 | if (regno != -1) |
| 1399 | { |
| 1400 | ioctl (pi->fd, PIOCGFPREG, &pi->fpregset); |
| 1401 | } |
| 1402 | fill_fpregset (&pi->fpregset, regno); |
| 1403 | ioctl (pi->fd, PIOCSFPREG, &pi->fpregset); |
| 1404 | |
| 1405 | #endif /* FP0_REGNUM */ |
| 1406 | |
| 1407 | } |
| 1408 | |
| 1409 | /* |
| 1410 | |
| 1411 | LOCAL FUNCTION |
| 1412 | |
| 1413 | create_procinfo - initialize access to a /proc entry |
| 1414 | |
| 1415 | SYNOPSIS |
| 1416 | |
| 1417 | void create_procinfo (int pid) |
| 1418 | |
| 1419 | DESCRIPTION |
| 1420 | |
| 1421 | Allocate a procinfo structure, open the /proc file and then sets up |
| 1422 | the set of signals and faults that are to be traced. |
| 1423 | |
| 1424 | NOTES |
| 1425 | |
| 1426 | If proc_init_failed ever gets called, control returns to the command |
| 1427 | processing loop via the standard error handling code. |
| 1428 | |
| 1429 | */ |
| 1430 | |
| 1431 | static void |
| 1432 | create_procinfo (pid) |
| 1433 | int pid; |
| 1434 | { |
| 1435 | struct procinfo *pi; |
| 1436 | |
| 1437 | if (find_procinfo (pid, 1)) |
| 1438 | return; /* All done! It already exists */ |
| 1439 | |
| 1440 | pi = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
| 1441 | |
| 1442 | if (!open_proc_file (pid, pi, O_RDWR)) |
| 1443 | proc_init_failed (pi, "can't open process file"); |
| 1444 | |
| 1445 | /* Add new process to process info list */ |
| 1446 | |
| 1447 | pi->next = procinfo_list; |
| 1448 | procinfo_list = pi; |
| 1449 | |
| 1450 | add_fd (pi); /* Add to list for poll/select */ |
| 1451 | |
| 1452 | memset ((char *) &pi->prrun, 0, sizeof (pi->prrun)); |
| 1453 | prfillset (&pi->prrun.pr_trace); |
| 1454 | procfs_notice_signals (pid); |
| 1455 | prfillset (&pi->prrun.pr_fault); |
| 1456 | prdelset (&pi->prrun.pr_fault, FLTPAGE); |
| 1457 | |
| 1458 | if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) |
| 1459 | proc_init_failed (pi, "PIOCWSTOP failed"); |
| 1460 | |
| 1461 | if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0) |
| 1462 | proc_init_failed (pi, "PIOCSFAULT failed"); |
| 1463 | } |
| 1464 | |
| 1465 | /* |
| 1466 | |
| 1467 | LOCAL FUNCTION |
| 1468 | |
| 1469 | procfs_init_inferior - initialize target vector and access to a |
| 1470 | /proc entry |
| 1471 | |
| 1472 | SYNOPSIS |
| 1473 | |
| 1474 | void procfs_init_inferior (int pid) |
| 1475 | |
| 1476 | DESCRIPTION |
| 1477 | |
| 1478 | When gdb starts an inferior, this function is called in the parent |
| 1479 | process immediately after the fork. It waits for the child to stop |
| 1480 | on the return from the exec system call (the child itself takes care |
| 1481 | of ensuring that this is set up), then sets up the set of signals |
| 1482 | and faults that are to be traced. |
| 1483 | |
| 1484 | NOTES |
| 1485 | |
| 1486 | If proc_init_failed ever gets called, control returns to the command |
| 1487 | processing loop via the standard error handling code. |
| 1488 | |
| 1489 | */ |
| 1490 | |
| 1491 | static void |
| 1492 | procfs_init_inferior (pid) |
| 1493 | int pid; |
| 1494 | { |
| 1495 | push_target (&procfs_ops); |
| 1496 | |
| 1497 | create_procinfo (pid); |
| 1498 | add_thread (pid); /* Setup initial thread */ |
| 1499 | |
| 1500 | /* One trap to exec the shell, one to exec the program being debugged. */ |
| 1501 | startup_inferior (2); |
| 1502 | } |
| 1503 | |
| 1504 | /* |
| 1505 | |
| 1506 | GLOBAL FUNCTION |
| 1507 | |
| 1508 | procfs_notice_signals |
| 1509 | |
| 1510 | SYNOPSIS |
| 1511 | |
| 1512 | static void procfs_notice_signals (int pid); |
| 1513 | |
| 1514 | DESCRIPTION |
| 1515 | |
| 1516 | When the user changes the state of gdb's signal handling via the |
| 1517 | "handle" command, this function gets called to see if any change |
| 1518 | in the /proc interface is required. It is also called internally |
| 1519 | by other /proc interface functions to initialize the state of |
| 1520 | the traced signal set. |
| 1521 | |
| 1522 | One thing it does is that signals for which the state is "nostop", |
| 1523 | "noprint", and "pass", have their trace bits reset in the pr_trace |
| 1524 | field, so that they are no longer traced. This allows them to be |
| 1525 | delivered directly to the inferior without the debugger ever being |
| 1526 | involved. |
| 1527 | */ |
| 1528 | |
| 1529 | static void |
| 1530 | procfs_notice_signals (pid) |
| 1531 | int pid; |
| 1532 | { |
| 1533 | int signo; |
| 1534 | struct procinfo *pi; |
| 1535 | |
| 1536 | pi = find_procinfo (pid, 0); |
| 1537 | |
| 1538 | for (signo = 0; signo < NSIG; signo++) |
| 1539 | { |
| 1540 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && |
| 1541 | signal_print_state (target_signal_from_host (signo)) == 0 && |
| 1542 | signal_pass_state (target_signal_from_host (signo)) == 1) |
| 1543 | { |
| 1544 | prdelset (&pi->prrun.pr_trace, signo); |
| 1545 | } |
| 1546 | else |
| 1547 | { |
| 1548 | praddset (&pi->prrun.pr_trace, signo); |
| 1549 | } |
| 1550 | } |
| 1551 | if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace)) |
| 1552 | { |
| 1553 | print_sys_errmsg ("PIOCSTRACE failed", errno); |
| 1554 | } |
| 1555 | } |
| 1556 | |
| 1557 | /* |
| 1558 | |
| 1559 | LOCAL FUNCTION |
| 1560 | |
| 1561 | proc_set_exec_trap -- arrange for exec'd child to halt at startup |
| 1562 | |
| 1563 | SYNOPSIS |
| 1564 | |
| 1565 | void proc_set_exec_trap (void) |
| 1566 | |
| 1567 | DESCRIPTION |
| 1568 | |
| 1569 | This function is called in the child process when starting up |
| 1570 | an inferior, prior to doing the exec of the actual inferior. |
| 1571 | It sets the child process's exitset to make exit from the exec |
| 1572 | system call an event of interest to stop on, and then simply |
| 1573 | returns. The child does the exec, the system call returns, and |
| 1574 | the child stops at the first instruction, ready for the gdb |
| 1575 | parent process to take control of it. |
| 1576 | |
| 1577 | NOTE |
| 1578 | |
| 1579 | We need to use all local variables since the child may be sharing |
| 1580 | it's data space with the parent, if vfork was used rather than |
| 1581 | fork. |
| 1582 | |
| 1583 | Also note that we want to turn off the inherit-on-fork flag in |
| 1584 | the child process so that any grand-children start with all |
| 1585 | tracing flags cleared. |
| 1586 | */ |
| 1587 | |
| 1588 | static void |
| 1589 | proc_set_exec_trap () |
| 1590 | { |
| 1591 | sysset_t exitset; |
| 1592 | sysset_t entryset; |
| 1593 | auto char procname[32]; |
| 1594 | int fd; |
| 1595 | |
| 1596 | sprintf (procname, PROC_NAME_FMT, getpid ()); |
| 1597 | if ((fd = open (procname, O_RDWR)) < 0) |
| 1598 | { |
| 1599 | perror (procname); |
| 1600 | gdb_flush (gdb_stderr); |
| 1601 | _exit (127); |
| 1602 | } |
| 1603 | premptyset (&exitset); |
| 1604 | premptyset (&entryset); |
| 1605 | |
| 1606 | /* GW: Rationale... |
| 1607 | Not all systems with /proc have all the exec* syscalls with the same |
| 1608 | names. On the SGI, for example, there is no SYS_exec, but there |
| 1609 | *is* a SYS_execv. So, we try to account for that. */ |
| 1610 | |
| 1611 | #ifdef SYS_exec |
| 1612 | praddset (&exitset, SYS_exec); |
| 1613 | #endif |
| 1614 | #ifdef SYS_execve |
| 1615 | praddset (&exitset, SYS_execve); |
| 1616 | #endif |
| 1617 | #ifdef SYS_execv |
| 1618 | praddset (&exitset, SYS_execv); |
| 1619 | #endif |
| 1620 | |
| 1621 | if (ioctl (fd, PIOCSEXIT, &exitset) < 0) |
| 1622 | { |
| 1623 | perror (procname); |
| 1624 | gdb_flush (gdb_stderr); |
| 1625 | _exit (127); |
| 1626 | } |
| 1627 | |
| 1628 | praddset (&entryset, SYS_exit); |
| 1629 | |
| 1630 | if (ioctl (fd, PIOCSENTRY, &entryset) < 0) |
| 1631 | { |
| 1632 | perror (procname); |
| 1633 | gdb_flush (gdb_stderr); |
| 1634 | _exit (126); |
| 1635 | } |
| 1636 | |
| 1637 | /* Turn off inherit-on-fork flag so that all grand-children of gdb |
| 1638 | start with tracing flags cleared. */ |
| 1639 | |
| 1640 | #if defined (PIOCRESET) /* New method */ |
| 1641 | { |
| 1642 | long pr_flags; |
| 1643 | pr_flags = PR_FORK; |
| 1644 | ioctl (fd, PIOCRESET, &pr_flags); |
| 1645 | } |
| 1646 | #else |
| 1647 | #if defined (PIOCRFORK) /* Original method */ |
| 1648 | ioctl (fd, PIOCRFORK, NULL); |
| 1649 | #endif |
| 1650 | #endif |
| 1651 | |
| 1652 | /* Turn on run-on-last-close flag so that this process will not hang |
| 1653 | if GDB goes away for some reason. */ |
| 1654 | |
| 1655 | #if defined (PIOCSET) /* New method */ |
| 1656 | { |
| 1657 | long pr_flags; |
| 1658 | pr_flags = PR_RLC; |
| 1659 | (void) ioctl (fd, PIOCSET, &pr_flags); |
| 1660 | } |
| 1661 | #else |
| 1662 | #if defined (PIOCSRLC) /* Original method */ |
| 1663 | (void) ioctl (fd, PIOCSRLC, 0); |
| 1664 | #endif |
| 1665 | #endif |
| 1666 | } |
| 1667 | |
| 1668 | /* |
| 1669 | |
| 1670 | GLOBAL FUNCTION |
| 1671 | |
| 1672 | proc_iterate_over_mappings -- call function for every mapped space |
| 1673 | |
| 1674 | SYNOPSIS |
| 1675 | |
| 1676 | int proc_iterate_over_mappings (int (*func)()) |
| 1677 | |
| 1678 | DESCRIPTION |
| 1679 | |
| 1680 | Given a pointer to a function, call that function for every |
| 1681 | mapped address space, passing it an open file descriptor for |
| 1682 | the file corresponding to that mapped address space (if any) |
| 1683 | and the base address of the mapped space. Quit when we hit |
| 1684 | the end of the mappings or the function returns nonzero. |
| 1685 | */ |
| 1686 | |
| 1687 | int |
| 1688 | proc_iterate_over_mappings (func) |
| 1689 | int (*func) PARAMS ((int, CORE_ADDR)); |
| 1690 | { |
| 1691 | int nmap; |
| 1692 | int fd; |
| 1693 | int funcstat = 0; |
| 1694 | struct prmap *prmaps; |
| 1695 | struct prmap *prmap; |
| 1696 | struct procinfo *pi; |
| 1697 | |
| 1698 | pi = current_procinfo; |
| 1699 | |
| 1700 | if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0) |
| 1701 | { |
| 1702 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 1703 | if (ioctl (pi->fd, PIOCMAP, prmaps) == 0) |
| 1704 | { |
| 1705 | for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap) |
| 1706 | { |
| 1707 | fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0); |
| 1708 | funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr); |
| 1709 | close (fd); |
| 1710 | } |
| 1711 | } |
| 1712 | } |
| 1713 | return (funcstat); |
| 1714 | } |
| 1715 | |
| 1716 | #if 0 /* Currently unused */ |
| 1717 | /* |
| 1718 | |
| 1719 | GLOBAL FUNCTION |
| 1720 | |
| 1721 | proc_base_address -- find base address for segment containing address |
| 1722 | |
| 1723 | SYNOPSIS |
| 1724 | |
| 1725 | CORE_ADDR proc_base_address (CORE_ADDR addr) |
| 1726 | |
| 1727 | DESCRIPTION |
| 1728 | |
| 1729 | Given an address of a location in the inferior, find and return |
| 1730 | the base address of the mapped segment containing that address. |
| 1731 | |
| 1732 | This is used for example, by the shared library support code, |
| 1733 | where we have the pc value for some location in the shared library |
| 1734 | where we are stopped, and need to know the base address of the |
| 1735 | segment containing that address. |
| 1736 | */ |
| 1737 | |
| 1738 | CORE_ADDR |
| 1739 | proc_base_address (addr) |
| 1740 | CORE_ADDR addr; |
| 1741 | { |
| 1742 | int nmap; |
| 1743 | struct prmap *prmaps; |
| 1744 | struct prmap *prmap; |
| 1745 | CORE_ADDR baseaddr = 0; |
| 1746 | struct procinfo *pi; |
| 1747 | |
| 1748 | pi = current_procinfo; |
| 1749 | |
| 1750 | if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0) |
| 1751 | { |
| 1752 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 1753 | if (ioctl (pi->fd, PIOCMAP, prmaps) == 0) |
| 1754 | { |
| 1755 | for (prmap = prmaps; prmap -> pr_size; ++prmap) |
| 1756 | { |
| 1757 | if ((prmap -> pr_vaddr <= (caddr_t) addr) && |
| 1758 | (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr)) |
| 1759 | { |
| 1760 | baseaddr = (CORE_ADDR) prmap -> pr_vaddr; |
| 1761 | break; |
| 1762 | } |
| 1763 | } |
| 1764 | } |
| 1765 | } |
| 1766 | return (baseaddr); |
| 1767 | } |
| 1768 | |
| 1769 | #endif /* 0 */ |
| 1770 | |
| 1771 | /* |
| 1772 | |
| 1773 | LOCAL FUNCTION |
| 1774 | |
| 1775 | proc_address_to_fd -- return open fd for file mapped to address |
| 1776 | |
| 1777 | SYNOPSIS |
| 1778 | |
| 1779 | int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain) |
| 1780 | |
| 1781 | DESCRIPTION |
| 1782 | |
| 1783 | Given an address in the current inferior's address space, use the |
| 1784 | /proc interface to find an open file descriptor for the file that |
| 1785 | this address was mapped in from. Return -1 if there is no current |
| 1786 | inferior. Print a warning message if there is an inferior but |
| 1787 | the address corresponds to no file (IE a bogus address). |
| 1788 | |
| 1789 | */ |
| 1790 | |
| 1791 | static int |
| 1792 | proc_address_to_fd (pi, addr, complain) |
| 1793 | struct procinfo *pi; |
| 1794 | CORE_ADDR addr; |
| 1795 | int complain; |
| 1796 | { |
| 1797 | int fd = -1; |
| 1798 | |
| 1799 | if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0) |
| 1800 | { |
| 1801 | if (complain) |
| 1802 | { |
| 1803 | print_sys_errmsg (pi->pathname, errno); |
| 1804 | warning ("can't find mapped file for address 0x%x", addr); |
| 1805 | } |
| 1806 | } |
| 1807 | return (fd); |
| 1808 | } |
| 1809 | |
| 1810 | |
| 1811 | /* Attach to process PID, then initialize for debugging it |
| 1812 | and wait for the trace-trap that results from attaching. */ |
| 1813 | |
| 1814 | static void |
| 1815 | procfs_attach (args, from_tty) |
| 1816 | char *args; |
| 1817 | int from_tty; |
| 1818 | { |
| 1819 | char *exec_file; |
| 1820 | int pid; |
| 1821 | |
| 1822 | if (!args) |
| 1823 | error_no_arg ("process-id to attach"); |
| 1824 | |
| 1825 | pid = atoi (args); |
| 1826 | |
| 1827 | if (pid == getpid()) /* Trying to masturbate? */ |
| 1828 | error ("I refuse to debug myself!"); |
| 1829 | |
| 1830 | if (from_tty) |
| 1831 | { |
| 1832 | exec_file = (char *) get_exec_file (0); |
| 1833 | |
| 1834 | if (exec_file) |
| 1835 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid)); |
| 1836 | else |
| 1837 | printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid)); |
| 1838 | |
| 1839 | gdb_flush (gdb_stdout); |
| 1840 | } |
| 1841 | |
| 1842 | do_attach (pid); |
| 1843 | inferior_pid = pid; |
| 1844 | push_target (&procfs_ops); |
| 1845 | } |
| 1846 | |
| 1847 | |
| 1848 | /* Take a program previously attached to and detaches it. |
| 1849 | The program resumes execution and will no longer stop |
| 1850 | on signals, etc. We'd better not have left any breakpoints |
| 1851 | in the program or it'll die when it hits one. For this |
| 1852 | to work, it may be necessary for the process to have been |
| 1853 | previously attached. It *might* work if the program was |
| 1854 | started via the normal ptrace (PTRACE_TRACEME). */ |
| 1855 | |
| 1856 | static void |
| 1857 | procfs_detach (args, from_tty) |
| 1858 | char *args; |
| 1859 | int from_tty; |
| 1860 | { |
| 1861 | int siggnal = 0; |
| 1862 | |
| 1863 | if (from_tty) |
| 1864 | { |
| 1865 | char *exec_file = get_exec_file (0); |
| 1866 | if (exec_file == 0) |
| 1867 | exec_file = ""; |
| 1868 | printf_unfiltered ("Detaching from program: %s %s\n", |
| 1869 | exec_file, target_pid_to_str (inferior_pid)); |
| 1870 | gdb_flush (gdb_stdout); |
| 1871 | } |
| 1872 | if (args) |
| 1873 | siggnal = atoi (args); |
| 1874 | |
| 1875 | do_detach (siggnal); |
| 1876 | inferior_pid = 0; |
| 1877 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ |
| 1878 | } |
| 1879 | |
| 1880 | /* Get ready to modify the registers array. On machines which store |
| 1881 | individual registers, this doesn't need to do anything. On machines |
| 1882 | which store all the registers in one fell swoop, this makes sure |
| 1883 | that registers contains all the registers from the program being |
| 1884 | debugged. */ |
| 1885 | |
| 1886 | static void |
| 1887 | procfs_prepare_to_store () |
| 1888 | { |
| 1889 | #ifdef CHILD_PREPARE_TO_STORE |
| 1890 | CHILD_PREPARE_TO_STORE (); |
| 1891 | #endif |
| 1892 | } |
| 1893 | |
| 1894 | /* Print status information about what we're accessing. */ |
| 1895 | |
| 1896 | static void |
| 1897 | procfs_files_info (ignore) |
| 1898 | struct target_ops *ignore; |
| 1899 | { |
| 1900 | printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n", |
| 1901 | attach_flag? "attached": "child", target_pid_to_str (inferior_pid)); |
| 1902 | } |
| 1903 | |
| 1904 | /* ARGSUSED */ |
| 1905 | static void |
| 1906 | procfs_open (arg, from_tty) |
| 1907 | char *arg; |
| 1908 | int from_tty; |
| 1909 | { |
| 1910 | error ("Use the \"run\" command to start a Unix child process."); |
| 1911 | } |
| 1912 | |
| 1913 | /* |
| 1914 | |
| 1915 | LOCAL FUNCTION |
| 1916 | |
| 1917 | do_attach -- attach to an already existing process |
| 1918 | |
| 1919 | SYNOPSIS |
| 1920 | |
| 1921 | int do_attach (int pid) |
| 1922 | |
| 1923 | DESCRIPTION |
| 1924 | |
| 1925 | Attach to an already existing process with the specified process |
| 1926 | id. If the process is not already stopped, query whether to |
| 1927 | stop it or not. |
| 1928 | |
| 1929 | NOTES |
| 1930 | |
| 1931 | The option of stopping at attach time is specific to the /proc |
| 1932 | versions of gdb. Versions using ptrace force the attachee |
| 1933 | to stop. (I have changed this version to do so, too. All you |
| 1934 | have to do is "continue" to make it go on. -- gnu@cygnus.com) |
| 1935 | |
| 1936 | */ |
| 1937 | |
| 1938 | static int |
| 1939 | do_attach (pid) |
| 1940 | int pid; |
| 1941 | { |
| 1942 | int result; |
| 1943 | struct procinfo *pi; |
| 1944 | |
| 1945 | pi = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
| 1946 | |
| 1947 | if (!open_proc_file (pid, pi, O_RDWR)) |
| 1948 | { |
| 1949 | free (pi); |
| 1950 | perror_with_name (pi->pathname); |
| 1951 | /* NOTREACHED */ |
| 1952 | } |
| 1953 | |
| 1954 | /* Add new process to process info list */ |
| 1955 | |
| 1956 | pi->next = procinfo_list; |
| 1957 | procinfo_list = pi; |
| 1958 | |
| 1959 | add_fd (pi); /* Add to list for poll/select */ |
| 1960 | |
| 1961 | /* Get current status of process and if it is not already stopped, |
| 1962 | then stop it. Remember whether or not it was stopped when we first |
| 1963 | examined it. */ |
| 1964 | |
| 1965 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
| 1966 | { |
| 1967 | print_sys_errmsg (pi->pathname, errno); |
| 1968 | close_proc_file (pi); |
| 1969 | error ("PIOCSTATUS failed"); |
| 1970 | } |
| 1971 | if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 1972 | { |
| 1973 | pi->was_stopped = 1; |
| 1974 | } |
| 1975 | else |
| 1976 | { |
| 1977 | pi->was_stopped = 0; |
| 1978 | if (1 || query ("Process is currently running, stop it? ")) |
| 1979 | { |
| 1980 | /* Make it run again when we close it. */ |
| 1981 | #if defined (PIOCSET) /* New method */ |
| 1982 | { |
| 1983 | long pr_flags; |
| 1984 | pr_flags = PR_RLC; |
| 1985 | result = ioctl (pi->fd, PIOCSET, &pr_flags); |
| 1986 | } |
| 1987 | #else |
| 1988 | #if defined (PIOCSRLC) /* Original method */ |
| 1989 | result = ioctl (pi->fd, PIOCSRLC, 0); |
| 1990 | #endif |
| 1991 | #endif |
| 1992 | if (result < 0) |
| 1993 | { |
| 1994 | print_sys_errmsg (pi->pathname, errno); |
| 1995 | close_proc_file (pi); |
| 1996 | error ("PIOCSRLC or PIOCSET failed"); |
| 1997 | } |
| 1998 | if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0) |
| 1999 | { |
| 2000 | print_sys_errmsg (pi->pathname, errno); |
| 2001 | close_proc_file (pi); |
| 2002 | error ("PIOCSTOP failed"); |
| 2003 | } |
| 2004 | pi->nopass_next_sigstop = 1; |
| 2005 | } |
| 2006 | else |
| 2007 | { |
| 2008 | printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid)); |
| 2009 | } |
| 2010 | } |
| 2011 | |
| 2012 | /* Remember some things about the inferior that we will, or might, change |
| 2013 | so that we can restore them when we detach. */ |
| 2014 | |
| 2015 | ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace); |
| 2016 | ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold); |
| 2017 | ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset); |
| 2018 | ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset); |
| 2019 | ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset); |
| 2020 | |
| 2021 | /* Set up trace and fault sets, as gdb expects them. */ |
| 2022 | |
| 2023 | memset (&pi->prrun, 0, sizeof (pi->prrun)); |
| 2024 | prfillset (&pi->prrun.pr_trace); |
| 2025 | procfs_notice_signals (pid); |
| 2026 | prfillset (&pi->prrun.pr_fault); |
| 2027 | prdelset (&pi->prrun.pr_fault, FLTPAGE); |
| 2028 | if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault)) |
| 2029 | { |
| 2030 | print_sys_errmsg ("PIOCSFAULT failed", errno); |
| 2031 | } |
| 2032 | if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace)) |
| 2033 | { |
| 2034 | print_sys_errmsg ("PIOCSTRACE failed", errno); |
| 2035 | } |
| 2036 | attach_flag = 1; |
| 2037 | return (pid); |
| 2038 | } |
| 2039 | |
| 2040 | /* |
| 2041 | |
| 2042 | LOCAL FUNCTION |
| 2043 | |
| 2044 | do_detach -- detach from an attached-to process |
| 2045 | |
| 2046 | SYNOPSIS |
| 2047 | |
| 2048 | void do_detach (int signal) |
| 2049 | |
| 2050 | DESCRIPTION |
| 2051 | |
| 2052 | Detach from the current attachee. |
| 2053 | |
| 2054 | If signal is non-zero, the attachee is started running again and sent |
| 2055 | the specified signal. |
| 2056 | |
| 2057 | If signal is zero and the attachee was not already stopped when we |
| 2058 | attached to it, then we make it runnable again when we detach. |
| 2059 | |
| 2060 | Otherwise, we query whether or not to make the attachee runnable |
| 2061 | again, since we may simply want to leave it in the state it was in |
| 2062 | when we attached. |
| 2063 | |
| 2064 | We report any problems, but do not consider them errors, since we |
| 2065 | MUST detach even if some things don't seem to go right. This may not |
| 2066 | be the ideal situation. (FIXME). |
| 2067 | */ |
| 2068 | |
| 2069 | static void |
| 2070 | do_detach (signal) |
| 2071 | int signal; |
| 2072 | { |
| 2073 | int result; |
| 2074 | struct procinfo *pi; |
| 2075 | |
| 2076 | pi = current_procinfo; |
| 2077 | |
| 2078 | if (signal) |
| 2079 | { |
| 2080 | set_proc_siginfo (pi, signal); |
| 2081 | } |
| 2082 | if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0) |
| 2083 | { |
| 2084 | print_sys_errmsg (pi->pathname, errno); |
| 2085 | printf_unfiltered ("PIOCSEXIT failed.\n"); |
| 2086 | } |
| 2087 | if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0) |
| 2088 | { |
| 2089 | print_sys_errmsg (pi->pathname, errno); |
| 2090 | printf_unfiltered ("PIOCSENTRY failed.\n"); |
| 2091 | } |
| 2092 | if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0) |
| 2093 | { |
| 2094 | print_sys_errmsg (pi->pathname, errno); |
| 2095 | printf_unfiltered ("PIOCSTRACE failed.\n"); |
| 2096 | } |
| 2097 | if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0) |
| 2098 | { |
| 2099 | print_sys_errmsg (pi->pathname, errno); |
| 2100 | printf_unfiltered ("PIOSCHOLD failed.\n"); |
| 2101 | } |
| 2102 | if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0) |
| 2103 | { |
| 2104 | print_sys_errmsg (pi->pathname, errno); |
| 2105 | printf_unfiltered ("PIOCSFAULT failed.\n"); |
| 2106 | } |
| 2107 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
| 2108 | { |
| 2109 | print_sys_errmsg (pi->pathname, errno); |
| 2110 | printf_unfiltered ("PIOCSTATUS failed.\n"); |
| 2111 | } |
| 2112 | else |
| 2113 | { |
| 2114 | if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))) |
| 2115 | { |
| 2116 | if (signal || !pi->was_stopped || |
| 2117 | query ("Was stopped when attached, make it runnable again? ")) |
| 2118 | { |
| 2119 | /* Clear any fault that might have stopped it. */ |
| 2120 | if (ioctl (pi->fd, PIOCCFAULT, 0)) |
| 2121 | { |
| 2122 | print_sys_errmsg (pi->pathname, errno); |
| 2123 | printf_unfiltered ("PIOCCFAULT failed.\n"); |
| 2124 | } |
| 2125 | |
| 2126 | /* Make it run again when we close it. */ |
| 2127 | #if defined (PIOCSET) /* New method */ |
| 2128 | { |
| 2129 | long pr_flags; |
| 2130 | pr_flags = PR_RLC; |
| 2131 | result = ioctl (pi->fd, PIOCSET, &pr_flags); |
| 2132 | } |
| 2133 | #else |
| 2134 | #if defined (PIOCSRLC) /* Original method */ |
| 2135 | result = ioctl (pi->fd, PIOCSRLC, 0); |
| 2136 | #endif |
| 2137 | #endif |
| 2138 | if (result) |
| 2139 | { |
| 2140 | print_sys_errmsg (pi->pathname, errno); |
| 2141 | printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n"); |
| 2142 | } |
| 2143 | } |
| 2144 | } |
| 2145 | } |
| 2146 | close_proc_file (pi); |
| 2147 | attach_flag = 0; |
| 2148 | } |
| 2149 | |
| 2150 | /* emulate wait() as much as possible. |
| 2151 | Wait for child to do something. Return pid of child, or -1 in case |
| 2152 | of error; store status in *OURSTATUS. |
| 2153 | |
| 2154 | Not sure why we can't |
| 2155 | just use wait(), but it seems to have problems when applied to a |
| 2156 | process being controlled with the /proc interface. |
| 2157 | |
| 2158 | We have a race problem here with no obvious solution. We need to let |
| 2159 | the inferior run until it stops on an event of interest, which means |
| 2160 | that we need to use the PIOCWSTOP ioctl. However, we cannot use this |
| 2161 | ioctl if the process is already stopped on something that is not an |
| 2162 | event of interest, or the call will hang indefinitely. Thus we first |
| 2163 | use PIOCSTATUS to see if the process is not stopped. If not, then we |
| 2164 | use PIOCWSTOP. But during the window between the two, if the process |
| 2165 | stops for any reason that is not an event of interest (such as a job |
| 2166 | control signal) then gdb will hang. One possible workaround is to set |
| 2167 | an alarm to wake up every minute of so and check to see if the process |
| 2168 | is still running, and if so, then reissue the PIOCWSTOP. But this is |
| 2169 | a real kludge, so has not been implemented. FIXME: investigate |
| 2170 | alternatives. |
| 2171 | |
| 2172 | FIXME: Investigate why wait() seems to have problems with programs |
| 2173 | being control by /proc routines. */ |
| 2174 | |
| 2175 | static int |
| 2176 | procfs_wait (pid, ourstatus) |
| 2177 | int pid; |
| 2178 | struct target_waitstatus *ourstatus; |
| 2179 | { |
| 2180 | short what; |
| 2181 | short why; |
| 2182 | int statval = 0; |
| 2183 | int checkerr = 0; |
| 2184 | int rtnval = -1; |
| 2185 | struct procinfo *pi; |
| 2186 | |
| 2187 | if (pid != -1) /* Non-specific process? */ |
| 2188 | pi = NULL; |
| 2189 | else |
| 2190 | for (pi = procinfo_list; pi; pi = pi->next) |
| 2191 | if (pi->had_event) |
| 2192 | break; |
| 2193 | |
| 2194 | wait_again: |
| 2195 | |
| 2196 | if (!pi) |
| 2197 | pi = wait_fd (); |
| 2198 | |
| 2199 | if (pid != -1) |
| 2200 | for (pi = procinfo_list; pi; pi = pi->next) |
| 2201 | if (pi->pid == pid && pi->had_event) |
| 2202 | break; |
| 2203 | |
| 2204 | if (!pi && !checkerr) |
| 2205 | goto wait_again; |
| 2206 | |
| 2207 | if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))) |
| 2208 | { |
| 2209 | if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) |
| 2210 | { |
| 2211 | checkerr++; |
| 2212 | } |
| 2213 | } |
| 2214 | if (checkerr) |
| 2215 | { |
| 2216 | if (errno == ENOENT) |
| 2217 | { |
| 2218 | rtnval = wait (&statval); |
| 2219 | if (rtnval != inferior_pid) |
| 2220 | { |
| 2221 | print_sys_errmsg (pi->pathname, errno); |
| 2222 | error ("PIOCWSTOP, wait failed, returned %d", rtnval); |
| 2223 | /* NOTREACHED */ |
| 2224 | } |
| 2225 | } |
| 2226 | else |
| 2227 | { |
| 2228 | print_sys_errmsg (pi->pathname, errno); |
| 2229 | error ("PIOCSTATUS or PIOCWSTOP failed."); |
| 2230 | /* NOTREACHED */ |
| 2231 | } |
| 2232 | } |
| 2233 | else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 2234 | { |
| 2235 | rtnval = pi->prstatus.pr_pid; |
| 2236 | why = pi->prstatus.pr_why; |
| 2237 | what = pi->prstatus.pr_what; |
| 2238 | |
| 2239 | switch (why) |
| 2240 | { |
| 2241 | case PR_SIGNALLED: |
| 2242 | statval = (what << 8) | 0177; |
| 2243 | break; |
| 2244 | case PR_SYSENTRY: |
| 2245 | if (what != SYS_exit) |
| 2246 | error ("PR_SYSENTRY, unknown system call %d", what); |
| 2247 | |
| 2248 | pi->prrun.pr_flags = PRCFAULT; |
| 2249 | |
| 2250 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) |
| 2251 | perror_with_name (pi->pathname); |
| 2252 | |
| 2253 | rtnval = wait (&statval); |
| 2254 | |
| 2255 | break; |
| 2256 | case PR_SYSEXIT: |
| 2257 | switch (what) |
| 2258 | { |
| 2259 | #ifdef SYS_exec |
| 2260 | case SYS_exec: |
| 2261 | #endif |
| 2262 | #ifdef SYS_execve |
| 2263 | case SYS_execve: |
| 2264 | #endif |
| 2265 | #ifdef SYS_execv |
| 2266 | case SYS_execv: |
| 2267 | #endif |
| 2268 | statval = (SIGTRAP << 8) | 0177; |
| 2269 | break; |
| 2270 | #ifdef SYS_sproc |
| 2271 | case SYS_sproc: |
| 2272 | /* We've just detected the completion of an sproc system call. Now we need to |
| 2273 | setup a procinfo struct for this thread, and notify the thread system of the |
| 2274 | new arrival. */ |
| 2275 | |
| 2276 | /* If sproc failed, then nothing interesting happened. Continue the process and |
| 2277 | go back to sleep. */ |
| 2278 | |
| 2279 | if (pi->prstatus.pr_errno != 0) |
| 2280 | { |
| 2281 | pi->prrun.pr_flags &= PRSTEP; |
| 2282 | pi->prrun.pr_flags |= PRCFAULT; |
| 2283 | |
| 2284 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) |
| 2285 | perror_with_name (pi->pathname); |
| 2286 | |
| 2287 | goto wait_again; |
| 2288 | } |
| 2289 | |
| 2290 | /* At this point, the new thread is stopped at it's first instruction, and |
| 2291 | the parent is stopped at the exit from sproc. */ |
| 2292 | |
| 2293 | /* Notify the caller of the arrival of a new thread. */ |
| 2294 | create_procinfo (pi->prstatus.pr_rval1); |
| 2295 | |
| 2296 | rtnval = pi->prstatus.pr_rval1; |
| 2297 | statval = (SIGTRAP << 8) | 0177; |
| 2298 | |
| 2299 | break; |
| 2300 | #endif /* SYS_sproc */ |
| 2301 | |
| 2302 | default: |
| 2303 | error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what); |
| 2304 | } |
| 2305 | break; |
| 2306 | case PR_REQUESTED: |
| 2307 | statval = (SIGSTOP << 8) | 0177; |
| 2308 | break; |
| 2309 | case PR_JOBCONTROL: |
| 2310 | statval = (what << 8) | 0177; |
| 2311 | break; |
| 2312 | case PR_FAULTED: |
| 2313 | switch (what) |
| 2314 | { |
| 2315 | case FLTPRIV: |
| 2316 | case FLTILL: |
| 2317 | statval = (SIGILL << 8) | 0177; |
| 2318 | break; |
| 2319 | case FLTBPT: |
| 2320 | case FLTTRACE: |
| 2321 | statval = (SIGTRAP << 8) | 0177; |
| 2322 | break; |
| 2323 | case FLTSTACK: |
| 2324 | case FLTACCESS: |
| 2325 | case FLTBOUNDS: |
| 2326 | statval = (SIGSEGV << 8) | 0177; |
| 2327 | break; |
| 2328 | case FLTIOVF: |
| 2329 | case FLTIZDIV: |
| 2330 | case FLTFPE: |
| 2331 | statval = (SIGFPE << 8) | 0177; |
| 2332 | break; |
| 2333 | case FLTPAGE: /* Recoverable page fault */ |
| 2334 | default: |
| 2335 | error ("PIOCWSTOP, unknown why %d, what %d", why, what); |
| 2336 | } |
| 2337 | break; |
| 2338 | default: |
| 2339 | error ("PIOCWSTOP, unknown why %d, what %d", why, what); |
| 2340 | } |
| 2341 | /* Stop all the other threads when any of them stops. */ |
| 2342 | |
| 2343 | { |
| 2344 | struct procinfo *procinfo; |
| 2345 | |
| 2346 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 2347 | { |
| 2348 | if (!procinfo->had_event) |
| 2349 | if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0) |
| 2350 | { |
| 2351 | print_sys_errmsg (procinfo->pathname, errno); |
| 2352 | error ("PIOCSTOP failed"); |
| 2353 | } |
| 2354 | } |
| 2355 | } |
| 2356 | } |
| 2357 | else |
| 2358 | { |
| 2359 | error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x", |
| 2360 | pi->prstatus.pr_flags); |
| 2361 | } |
| 2362 | |
| 2363 | store_waitstatus (ourstatus, statval); |
| 2364 | |
| 2365 | if (rtnval == -1) /* No more children to wait for */ |
| 2366 | { |
| 2367 | fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n"); |
| 2368 | /* Claim it exited with unknown signal. */ |
| 2369 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| 2370 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
| 2371 | return rtnval; |
| 2372 | } |
| 2373 | |
| 2374 | pi->had_event = 0; /* Indicate that we've seen this one */ |
| 2375 | return (rtnval); |
| 2376 | } |
| 2377 | |
| 2378 | /* |
| 2379 | |
| 2380 | LOCAL FUNCTION |
| 2381 | |
| 2382 | set_proc_siginfo - set a process's current signal info |
| 2383 | |
| 2384 | SYNOPSIS |
| 2385 | |
| 2386 | void set_proc_siginfo (struct procinfo *pip, int signo); |
| 2387 | |
| 2388 | DESCRIPTION |
| 2389 | |
| 2390 | Given a pointer to a process info struct in PIP and a signal number |
| 2391 | in SIGNO, set the process's current signal and its associated signal |
| 2392 | information. The signal will be delivered to the process immediately |
| 2393 | after execution is resumed, even if it is being held. In addition, |
| 2394 | this particular delivery will not cause another PR_SIGNALLED stop |
| 2395 | even if the signal is being traced. |
| 2396 | |
| 2397 | If we are not delivering the same signal that the prstatus siginfo |
| 2398 | struct contains information about, then synthesize a siginfo struct |
| 2399 | to match the signal we are doing to deliver, make it of the type |
| 2400 | "generated by a user process", and send this synthesized copy. When |
| 2401 | used to set the inferior's signal state, this will be required if we |
| 2402 | are not currently stopped because of a traced signal, or if we decide |
| 2403 | to continue with a different signal. |
| 2404 | |
| 2405 | Note that when continuing the inferior from a stop due to receipt |
| 2406 | of a traced signal, we either have set PRCSIG to clear the existing |
| 2407 | signal, or we have to call this function to do a PIOCSSIG with either |
| 2408 | the existing siginfo struct from pr_info, or one we have synthesized |
| 2409 | appropriately for the signal we want to deliver. Otherwise if the |
| 2410 | signal is still being traced, the inferior will immediately stop |
| 2411 | again. |
| 2412 | |
| 2413 | See siginfo(5) for more details. |
| 2414 | */ |
| 2415 | |
| 2416 | static void |
| 2417 | set_proc_siginfo (pip, signo) |
| 2418 | struct procinfo *pip; |
| 2419 | int signo; |
| 2420 | { |
| 2421 | struct siginfo newsiginfo; |
| 2422 | struct siginfo *sip; |
| 2423 | |
| 2424 | if (signo == pip -> prstatus.pr_info.si_signo) |
| 2425 | { |
| 2426 | sip = &pip -> prstatus.pr_info; |
| 2427 | } |
| 2428 | else |
| 2429 | { |
| 2430 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
| 2431 | sip = &newsiginfo; |
| 2432 | sip -> si_signo = signo; |
| 2433 | sip -> si_code = 0; |
| 2434 | sip -> si_errno = 0; |
| 2435 | sip -> si_pid = getpid (); |
| 2436 | sip -> si_uid = getuid (); |
| 2437 | } |
| 2438 | if (ioctl (pip -> fd, PIOCSSIG, sip) < 0) |
| 2439 | { |
| 2440 | print_sys_errmsg (pip -> pathname, errno); |
| 2441 | warning ("PIOCSSIG failed"); |
| 2442 | } |
| 2443 | } |
| 2444 | |
| 2445 | /* Resume execution of process PID. If STEP is nozero, then |
| 2446 | just single step it. If SIGNAL is nonzero, restart it with that |
| 2447 | signal activated. */ |
| 2448 | |
| 2449 | static void |
| 2450 | procfs_resume (pid, step, signo) |
| 2451 | int pid; |
| 2452 | int step; |
| 2453 | enum target_signal signo; |
| 2454 | { |
| 2455 | int signal_to_pass; |
| 2456 | struct procinfo *pi, *procinfo; |
| 2457 | |
| 2458 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); |
| 2459 | |
| 2460 | errno = 0; |
| 2461 | pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT; |
| 2462 | |
| 2463 | #if 0 |
| 2464 | /* It should not be necessary. If the user explicitly changes the value, |
| 2465 | value_assign calls write_register_bytes, which writes it. */ |
| 2466 | /* It may not be absolutely necessary to specify the PC value for |
| 2467 | restarting, but to be safe we use the value that gdb considers |
| 2468 | to be current. One case where this might be necessary is if the |
| 2469 | user explicitly changes the PC value that gdb considers to be |
| 2470 | current. FIXME: Investigate if this is necessary or not. */ |
| 2471 | |
| 2472 | #ifdef PRSVADDR_BROKEN |
| 2473 | /* Can't do this under Solaris running on a Sparc, as there seems to be no |
| 2474 | place to put nPC. In fact, if you use this, nPC seems to be set to some |
| 2475 | random garbage. We have to rely on the fact that PC and nPC have been |
| 2476 | written previously via PIOCSREG during a register flush. */ |
| 2477 | |
| 2478 | pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)]; |
| 2479 | pi->prrun.pr_flags != PRSVADDR; |
| 2480 | #endif |
| 2481 | #endif |
| 2482 | |
| 2483 | if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop) |
| 2484 | /* When attaching to a child process, if we forced it to stop with |
| 2485 | a PIOCSTOP, then we will have set the nopass_next_sigstop flag. |
| 2486 | Upon resuming the first time after such a stop, we explicitly |
| 2487 | inhibit sending it another SIGSTOP, which would be the normal |
| 2488 | result of default signal handling. One potential drawback to |
| 2489 | this is that we will also ignore any attempt to by the user |
| 2490 | to explicitly continue after the attach with a SIGSTOP. Ultimately |
| 2491 | this problem should be dealt with by making the routines that |
| 2492 | deal with the inferior a little smarter, and possibly even allow |
| 2493 | an inferior to continue running at the same time as gdb. (FIXME?) */ |
| 2494 | signal_to_pass = 0; |
| 2495 | else if (signo == TARGET_SIGNAL_TSTP |
| 2496 | && pi->prstatus.pr_cursig == SIGTSTP |
| 2497 | && pi->prstatus.pr_action.sa_handler == SIG_DFL) |
| 2498 | |
| 2499 | /* We are about to pass the inferior a SIGTSTP whose action is |
| 2500 | SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop |
| 2501 | (notifying the parent via wait()), and then keep going from the |
| 2502 | same place when the parent is ready for you to keep going. So |
| 2503 | under the debugger, it should do nothing (as if the program had |
| 2504 | been stopped and then later resumed. Under ptrace, this |
| 2505 | happens for us, but under /proc, the system obligingly stops |
| 2506 | the process, and wait_for_inferior would have no way of |
| 2507 | distinguishing that type of stop (which indicates that we |
| 2508 | should just start it again), with a stop due to the pr_trace |
| 2509 | field of the prrun_t struct. |
| 2510 | |
| 2511 | Note that if the SIGTSTP is being caught, we *do* need to pass it, |
| 2512 | because the handler needs to get executed. */ |
| 2513 | signal_to_pass = 0; |
| 2514 | else |
| 2515 | signal_to_pass = target_signal_to_host (signo); |
| 2516 | |
| 2517 | if (signal_to_pass) |
| 2518 | { |
| 2519 | set_proc_siginfo (pi, signal_to_pass); |
| 2520 | } |
| 2521 | else |
| 2522 | { |
| 2523 | pi->prrun.pr_flags |= PRCSIG; |
| 2524 | } |
| 2525 | pi->nopass_next_sigstop = 0; |
| 2526 | if (step) |
| 2527 | { |
| 2528 | pi->prrun.pr_flags |= PRSTEP; |
| 2529 | } |
| 2530 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) |
| 2531 | { |
| 2532 | perror_with_name (pi->pathname); |
| 2533 | /* NOTREACHED */ |
| 2534 | } |
| 2535 | |
| 2536 | pi->had_event = 0; |
| 2537 | |
| 2538 | /* Continue all the other threads that haven't had an event of |
| 2539 | interest. */ |
| 2540 | |
| 2541 | if (pid == -1) |
| 2542 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 2543 | { |
| 2544 | if (pi != procinfo && !procinfo->had_event) |
| 2545 | { |
| 2546 | procinfo->prrun.pr_flags &= PRSTEP; |
| 2547 | procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG; |
| 2548 | ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus); |
| 2549 | if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0) |
| 2550 | { |
| 2551 | if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0) |
| 2552 | { |
| 2553 | fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno); |
| 2554 | } |
| 2555 | print_sys_errmsg (procinfo->pathname, errno); |
| 2556 | error ("PIOCRUN failed"); |
| 2557 | } |
| 2558 | ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus); |
| 2559 | } |
| 2560 | } |
| 2561 | } |
| 2562 | |
| 2563 | /* |
| 2564 | |
| 2565 | LOCAL FUNCTION |
| 2566 | |
| 2567 | procfs_fetch_registers -- fetch current registers from inferior |
| 2568 | |
| 2569 | SYNOPSIS |
| 2570 | |
| 2571 | void procfs_fetch_registers (int regno) |
| 2572 | |
| 2573 | DESCRIPTION |
| 2574 | |
| 2575 | Read the current values of the inferior's registers, both the |
| 2576 | general register set and floating point registers (if supported) |
| 2577 | and update gdb's idea of their current values. |
| 2578 | |
| 2579 | */ |
| 2580 | |
| 2581 | static void |
| 2582 | procfs_fetch_registers (regno) |
| 2583 | int regno; |
| 2584 | { |
| 2585 | struct procinfo *pi; |
| 2586 | |
| 2587 | pi = current_procinfo; |
| 2588 | |
| 2589 | if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1) |
| 2590 | { |
| 2591 | supply_gregset (&pi->gregset); |
| 2592 | } |
| 2593 | #if defined (FP0_REGNUM) |
| 2594 | if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1) |
| 2595 | { |
| 2596 | supply_fpregset (&pi->fpregset); |
| 2597 | } |
| 2598 | #endif |
| 2599 | } |
| 2600 | |
| 2601 | /* |
| 2602 | |
| 2603 | LOCAL FUNCTION |
| 2604 | |
| 2605 | proc_init_failed - called whenever /proc access initialization |
| 2606 | fails |
| 2607 | |
| 2608 | SYNOPSIS |
| 2609 | |
| 2610 | static void proc_init_failed (struct procinfo *pi, char *why) |
| 2611 | |
| 2612 | DESCRIPTION |
| 2613 | |
| 2614 | This function is called whenever initialization of access to a /proc |
| 2615 | entry fails. It prints a suitable error message, does some cleanup, |
| 2616 | and then invokes the standard error processing routine which dumps |
| 2617 | us back into the command loop. |
| 2618 | */ |
| 2619 | |
| 2620 | static void |
| 2621 | proc_init_failed (pi, why) |
| 2622 | struct procinfo *pi; |
| 2623 | char *why; |
| 2624 | { |
| 2625 | print_sys_errmsg (pi->pathname, errno); |
| 2626 | kill (pi->pid, SIGKILL); |
| 2627 | close_proc_file (pi); |
| 2628 | error (why); |
| 2629 | /* NOTREACHED */ |
| 2630 | } |
| 2631 | |
| 2632 | /* |
| 2633 | |
| 2634 | LOCAL FUNCTION |
| 2635 | |
| 2636 | close_proc_file - close any currently open /proc entry |
| 2637 | |
| 2638 | SYNOPSIS |
| 2639 | |
| 2640 | static void close_proc_file (struct procinfo *pip) |
| 2641 | |
| 2642 | DESCRIPTION |
| 2643 | |
| 2644 | Close any currently open /proc entry and mark the process information |
| 2645 | entry as invalid. In order to ensure that we don't try to reuse any |
| 2646 | stale information, the pid, fd, and pathnames are explicitly |
| 2647 | invalidated, which may be overkill. |
| 2648 | |
| 2649 | */ |
| 2650 | |
| 2651 | static void |
| 2652 | close_proc_file (pip) |
| 2653 | struct procinfo *pip; |
| 2654 | { |
| 2655 | struct procinfo *procinfo; |
| 2656 | |
| 2657 | remove_fd (pip); /* Remove fd from poll/select list */ |
| 2658 | |
| 2659 | close (pip -> fd); |
| 2660 | |
| 2661 | free (pip -> pathname); |
| 2662 | |
| 2663 | /* Unlink pip from the procinfo chain. Note pip might not be on the list. */ |
| 2664 | |
| 2665 | if (procinfo_list == pip) |
| 2666 | procinfo_list = pip->next; |
| 2667 | else |
| 2668 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 2669 | if (procinfo->next == pip) |
| 2670 | procinfo->next = pip->next; |
| 2671 | |
| 2672 | free (pip); |
| 2673 | } |
| 2674 | |
| 2675 | /* |
| 2676 | |
| 2677 | LOCAL FUNCTION |
| 2678 | |
| 2679 | open_proc_file - open a /proc entry for a given process id |
| 2680 | |
| 2681 | SYNOPSIS |
| 2682 | |
| 2683 | static int open_proc_file (int pid, struct procinfo *pip, int mode) |
| 2684 | |
| 2685 | DESCRIPTION |
| 2686 | |
| 2687 | Given a process id and a mode, close the existing open /proc |
| 2688 | entry (if any) and open one for the new process id, in the |
| 2689 | specified mode. Once it is open, then mark the local process |
| 2690 | information structure as valid, which guarantees that the pid, |
| 2691 | fd, and pathname fields match an open /proc entry. Returns |
| 2692 | zero if the open fails, nonzero otherwise. |
| 2693 | |
| 2694 | Note that the pathname is left intact, even when the open fails, |
| 2695 | so that callers can use it to construct meaningful error messages |
| 2696 | rather than just "file open failed". |
| 2697 | */ |
| 2698 | |
| 2699 | static int |
| 2700 | open_proc_file (pid, pip, mode) |
| 2701 | int pid; |
| 2702 | struct procinfo *pip; |
| 2703 | int mode; |
| 2704 | { |
| 2705 | pip -> next = NULL; |
| 2706 | pip -> had_event = 0; |
| 2707 | pip -> pathname = xmalloc (32); |
| 2708 | pip -> pid = pid; |
| 2709 | |
| 2710 | sprintf (pip -> pathname, PROC_NAME_FMT, pid); |
| 2711 | if ((pip -> fd = open (pip -> pathname, mode)) < 0) |
| 2712 | return 0; |
| 2713 | |
| 2714 | return 1; |
| 2715 | } |
| 2716 | |
| 2717 | static char * |
| 2718 | mappingflags (flags) |
| 2719 | long flags; |
| 2720 | { |
| 2721 | static char asciiflags[8]; |
| 2722 | |
| 2723 | strcpy (asciiflags, "-------"); |
| 2724 | #if defined (MA_PHYS) |
| 2725 | if (flags & MA_PHYS) asciiflags[0] = 'd'; |
| 2726 | #endif |
| 2727 | if (flags & MA_STACK) asciiflags[1] = 's'; |
| 2728 | if (flags & MA_BREAK) asciiflags[2] = 'b'; |
| 2729 | if (flags & MA_SHARED) asciiflags[3] = 's'; |
| 2730 | if (flags & MA_READ) asciiflags[4] = 'r'; |
| 2731 | if (flags & MA_WRITE) asciiflags[5] = 'w'; |
| 2732 | if (flags & MA_EXEC) asciiflags[6] = 'x'; |
| 2733 | return (asciiflags); |
| 2734 | } |
| 2735 | |
| 2736 | static void |
| 2737 | info_proc_flags (pip, summary) |
| 2738 | struct procinfo *pip; |
| 2739 | int summary; |
| 2740 | { |
| 2741 | struct trans *transp; |
| 2742 | |
| 2743 | printf_filtered ("%-32s", "Process status flags:"); |
| 2744 | if (!summary) |
| 2745 | { |
| 2746 | printf_filtered ("\n\n"); |
| 2747 | } |
| 2748 | for (transp = pr_flag_table; transp -> name != NULL; transp++) |
| 2749 | { |
| 2750 | if (pip -> prstatus.pr_flags & transp -> value) |
| 2751 | { |
| 2752 | if (summary) |
| 2753 | { |
| 2754 | printf_filtered ("%s ", transp -> name); |
| 2755 | } |
| 2756 | else |
| 2757 | { |
| 2758 | printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc); |
| 2759 | } |
| 2760 | } |
| 2761 | } |
| 2762 | printf_filtered ("\n"); |
| 2763 | } |
| 2764 | |
| 2765 | static void |
| 2766 | info_proc_stop (pip, summary) |
| 2767 | struct procinfo *pip; |
| 2768 | int summary; |
| 2769 | { |
| 2770 | struct trans *transp; |
| 2771 | int why; |
| 2772 | int what; |
| 2773 | |
| 2774 | why = pip -> prstatus.pr_why; |
| 2775 | what = pip -> prstatus.pr_what; |
| 2776 | |
| 2777 | if (pip -> prstatus.pr_flags & PR_STOPPED) |
| 2778 | { |
| 2779 | printf_filtered ("%-32s", "Reason for stopping:"); |
| 2780 | if (!summary) |
| 2781 | { |
| 2782 | printf_filtered ("\n\n"); |
| 2783 | } |
| 2784 | for (transp = pr_why_table; transp -> name != NULL; transp++) |
| 2785 | { |
| 2786 | if (why == transp -> value) |
| 2787 | { |
| 2788 | if (summary) |
| 2789 | { |
| 2790 | printf_filtered ("%s ", transp -> name); |
| 2791 | } |
| 2792 | else |
| 2793 | { |
| 2794 | printf_filtered ("\t%-16s %s.\n", |
| 2795 | transp -> name, transp -> desc); |
| 2796 | } |
| 2797 | break; |
| 2798 | } |
| 2799 | } |
| 2800 | |
| 2801 | /* Use the pr_why field to determine what the pr_what field means, and |
| 2802 | print more information. */ |
| 2803 | |
| 2804 | switch (why) |
| 2805 | { |
| 2806 | case PR_REQUESTED: |
| 2807 | /* pr_what is unused for this case */ |
| 2808 | break; |
| 2809 | case PR_JOBCONTROL: |
| 2810 | case PR_SIGNALLED: |
| 2811 | if (summary) |
| 2812 | { |
| 2813 | printf_filtered ("%s ", signalname (what)); |
| 2814 | } |
| 2815 | else |
| 2816 | { |
| 2817 | printf_filtered ("\t%-16s %s.\n", signalname (what), |
| 2818 | safe_strsignal (what)); |
| 2819 | } |
| 2820 | break; |
| 2821 | case PR_SYSENTRY: |
| 2822 | if (summary) |
| 2823 | { |
| 2824 | printf_filtered ("%s ", syscallname (what)); |
| 2825 | } |
| 2826 | else |
| 2827 | { |
| 2828 | printf_filtered ("\t%-16s %s.\n", syscallname (what), |
| 2829 | "Entered this system call"); |
| 2830 | } |
| 2831 | break; |
| 2832 | case PR_SYSEXIT: |
| 2833 | if (summary) |
| 2834 | { |
| 2835 | printf_filtered ("%s ", syscallname (what)); |
| 2836 | } |
| 2837 | else |
| 2838 | { |
| 2839 | printf_filtered ("\t%-16s %s.\n", syscallname (what), |
| 2840 | "Returned from this system call"); |
| 2841 | } |
| 2842 | break; |
| 2843 | case PR_FAULTED: |
| 2844 | if (summary) |
| 2845 | { |
| 2846 | printf_filtered ("%s ", |
| 2847 | lookupname (faults_table, what, "fault")); |
| 2848 | } |
| 2849 | else |
| 2850 | { |
| 2851 | printf_filtered ("\t%-16s %s.\n", |
| 2852 | lookupname (faults_table, what, "fault"), |
| 2853 | lookupdesc (faults_table, what)); |
| 2854 | } |
| 2855 | break; |
| 2856 | } |
| 2857 | printf_filtered ("\n"); |
| 2858 | } |
| 2859 | } |
| 2860 | |
| 2861 | static void |
| 2862 | info_proc_siginfo (pip, summary) |
| 2863 | struct procinfo *pip; |
| 2864 | int summary; |
| 2865 | { |
| 2866 | struct siginfo *sip; |
| 2867 | |
| 2868 | if ((pip -> prstatus.pr_flags & PR_STOPPED) && |
| 2869 | (pip -> prstatus.pr_why == PR_SIGNALLED || |
| 2870 | pip -> prstatus.pr_why == PR_FAULTED)) |
| 2871 | { |
| 2872 | printf_filtered ("%-32s", "Additional signal/fault info:"); |
| 2873 | sip = &pip -> prstatus.pr_info; |
| 2874 | if (summary) |
| 2875 | { |
| 2876 | printf_filtered ("%s ", signalname (sip -> si_signo)); |
| 2877 | if (sip -> si_errno > 0) |
| 2878 | { |
| 2879 | printf_filtered ("%s ", errnoname (sip -> si_errno)); |
| 2880 | } |
| 2881 | if (sip -> si_code <= 0) |
| 2882 | { |
| 2883 | printf_filtered ("sent by %s, uid %d ", |
| 2884 | target_pid_to_str (sip -> si_pid), |
| 2885 | sip -> si_uid); |
| 2886 | } |
| 2887 | else |
| 2888 | { |
| 2889 | printf_filtered ("%s ", sigcodename (sip)); |
| 2890 | if ((sip -> si_signo == SIGILL) || |
| 2891 | (sip -> si_signo == SIGFPE) || |
| 2892 | (sip -> si_signo == SIGSEGV) || |
| 2893 | (sip -> si_signo == SIGBUS)) |
| 2894 | { |
| 2895 | printf_filtered ("addr=%#x ", sip -> si_addr); |
| 2896 | } |
| 2897 | else if ((sip -> si_signo == SIGCHLD)) |
| 2898 | { |
| 2899 | printf_filtered ("child %s, status %u ", |
| 2900 | target_pid_to_str (sip -> si_pid), |
| 2901 | sip -> si_status); |
| 2902 | } |
| 2903 | else if ((sip -> si_signo == SIGPOLL)) |
| 2904 | { |
| 2905 | printf_filtered ("band %u ", sip -> si_band); |
| 2906 | } |
| 2907 | } |
| 2908 | } |
| 2909 | else |
| 2910 | { |
| 2911 | printf_filtered ("\n\n"); |
| 2912 | printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo), |
| 2913 | safe_strsignal (sip -> si_signo)); |
| 2914 | if (sip -> si_errno > 0) |
| 2915 | { |
| 2916 | printf_filtered ("\t%-16s %s.\n", |
| 2917 | errnoname (sip -> si_errno), |
| 2918 | safe_strerror (sip -> si_errno)); |
| 2919 | } |
| 2920 | if (sip -> si_code <= 0) |
| 2921 | { |
| 2922 | printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */ |
| 2923 | "PID of process sending signal"); |
| 2924 | printf_filtered ("\t%-16u %s\n", sip -> si_uid, |
| 2925 | "UID of process sending signal"); |
| 2926 | } |
| 2927 | else |
| 2928 | { |
| 2929 | printf_filtered ("\t%-16s %s.\n", sigcodename (sip), |
| 2930 | sigcodedesc (sip)); |
| 2931 | if ((sip -> si_signo == SIGILL) || |
| 2932 | (sip -> si_signo == SIGFPE)) |
| 2933 | { |
| 2934 | printf_filtered ("\t%-16#x %s.\n", sip -> si_addr, |
| 2935 | "Address of faulting instruction"); |
| 2936 | } |
| 2937 | else if ((sip -> si_signo == SIGSEGV) || |
| 2938 | (sip -> si_signo == SIGBUS)) |
| 2939 | { |
| 2940 | printf_filtered ("\t%-16#x %s.\n", sip -> si_addr, |
| 2941 | "Address of faulting memory reference"); |
| 2942 | } |
| 2943 | else if ((sip -> si_signo == SIGCHLD)) |
| 2944 | { |
| 2945 | printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */ |
| 2946 | "Child process ID"); |
| 2947 | printf_filtered ("\t%-16u %s.\n", sip -> si_status, |
| 2948 | "Child process exit value or signal"); |
| 2949 | } |
| 2950 | else if ((sip -> si_signo == SIGPOLL)) |
| 2951 | { |
| 2952 | printf_filtered ("\t%-16u %s.\n", sip -> si_band, |
| 2953 | "Band event for POLL_{IN,OUT,MSG}"); |
| 2954 | } |
| 2955 | } |
| 2956 | } |
| 2957 | printf_filtered ("\n"); |
| 2958 | } |
| 2959 | } |
| 2960 | |
| 2961 | static void |
| 2962 | info_proc_syscalls (pip, summary) |
| 2963 | struct procinfo *pip; |
| 2964 | int summary; |
| 2965 | { |
| 2966 | int syscallnum; |
| 2967 | |
| 2968 | if (!summary) |
| 2969 | { |
| 2970 | |
| 2971 | #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */ |
| 2972 | if (pip -> prstatus.pr_flags & PR_ASLEEP) |
| 2973 | { |
| 2974 | int syscallnum = pip -> prstatus.pr_reg[R_D0]; |
| 2975 | if (summary) |
| 2976 | { |
| 2977 | printf_filtered ("%-32s", "Sleeping in system call:"); |
| 2978 | printf_filtered ("%s", syscallname (syscallnum)); |
| 2979 | } |
| 2980 | else |
| 2981 | { |
| 2982 | printf_filtered ("Sleeping in system call '%s'.\n", |
| 2983 | syscallname (syscallnum)); |
| 2984 | } |
| 2985 | } |
| 2986 | #endif |
| 2987 | |
| 2988 | if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0) |
| 2989 | { |
| 2990 | print_sys_errmsg (pip -> pathname, errno); |
| 2991 | error ("PIOCGENTRY failed"); |
| 2992 | } |
| 2993 | |
| 2994 | if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0) |
| 2995 | { |
| 2996 | print_sys_errmsg (pip -> pathname, errno); |
| 2997 | error ("PIOCGEXIT failed"); |
| 2998 | } |
| 2999 | |
| 3000 | printf_filtered ("System call tracing information:\n\n"); |
| 3001 | |
| 3002 | printf_filtered ("\t%-12s %-8s %-8s\n", |
| 3003 | "System call", |
| 3004 | "Entry", |
| 3005 | "Exit"); |
| 3006 | for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++) |
| 3007 | { |
| 3008 | QUIT; |
| 3009 | if (syscall_table[syscallnum] != NULL) |
| 3010 | { |
| 3011 | printf_filtered ("\t%-12s ", syscall_table[syscallnum]); |
| 3012 | printf_filtered ("%-8s ", |
| 3013 | prismember (&pip -> entryset, syscallnum) |
| 3014 | ? "on" : "off"); |
| 3015 | printf_filtered ("%-8s ", |
| 3016 | prismember (&pip -> exitset, syscallnum) |
| 3017 | ? "on" : "off"); |
| 3018 | printf_filtered ("\n"); |
| 3019 | } |
| 3020 | } |
| 3021 | printf_filtered ("\n"); |
| 3022 | } |
| 3023 | } |
| 3024 | |
| 3025 | static char * |
| 3026 | signalname (signo) |
| 3027 | int signo; |
| 3028 | { |
| 3029 | char *name; |
| 3030 | static char locbuf[32]; |
| 3031 | |
| 3032 | name = strsigno (signo); |
| 3033 | if (name == NULL) |
| 3034 | { |
| 3035 | sprintf (locbuf, "Signal %d", signo); |
| 3036 | } |
| 3037 | else |
| 3038 | { |
| 3039 | sprintf (locbuf, "%s (%d)", name, signo); |
| 3040 | } |
| 3041 | return (locbuf); |
| 3042 | } |
| 3043 | |
| 3044 | static char * |
| 3045 | errnoname (errnum) |
| 3046 | int errnum; |
| 3047 | { |
| 3048 | char *name; |
| 3049 | static char locbuf[32]; |
| 3050 | |
| 3051 | name = strerrno (errnum); |
| 3052 | if (name == NULL) |
| 3053 | { |
| 3054 | sprintf (locbuf, "Errno %d", errnum); |
| 3055 | } |
| 3056 | else |
| 3057 | { |
| 3058 | sprintf (locbuf, "%s (%d)", name, errnum); |
| 3059 | } |
| 3060 | return (locbuf); |
| 3061 | } |
| 3062 | |
| 3063 | static void |
| 3064 | info_proc_signals (pip, summary) |
| 3065 | struct procinfo *pip; |
| 3066 | int summary; |
| 3067 | { |
| 3068 | int signo; |
| 3069 | |
| 3070 | if (!summary) |
| 3071 | { |
| 3072 | if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0) |
| 3073 | { |
| 3074 | print_sys_errmsg (pip -> pathname, errno); |
| 3075 | error ("PIOCGTRACE failed"); |
| 3076 | } |
| 3077 | |
| 3078 | printf_filtered ("Disposition of signals:\n\n"); |
| 3079 | printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n", |
| 3080 | "Signal", "Trace", "Hold", "Pending", "Description"); |
| 3081 | for (signo = 0; signo < NSIG; signo++) |
| 3082 | { |
| 3083 | QUIT; |
| 3084 | printf_filtered ("\t%-15s ", signalname (signo)); |
| 3085 | printf_filtered ("%-8s ", |
| 3086 | prismember (&pip -> trace, signo) |
| 3087 | ? "on" : "off"); |
| 3088 | printf_filtered ("%-8s ", |
| 3089 | prismember (&pip -> prstatus.pr_sighold, signo) |
| 3090 | ? "on" : "off"); |
| 3091 | printf_filtered ("%-8s ", |
| 3092 | prismember (&pip -> prstatus.pr_sigpend, signo) |
| 3093 | ? "yes" : "no"); |
| 3094 | printf_filtered (" %s\n", safe_strsignal (signo)); |
| 3095 | } |
| 3096 | printf_filtered ("\n"); |
| 3097 | } |
| 3098 | } |
| 3099 | |
| 3100 | static void |
| 3101 | info_proc_faults (pip, summary) |
| 3102 | struct procinfo *pip; |
| 3103 | int summary; |
| 3104 | { |
| 3105 | struct trans *transp; |
| 3106 | |
| 3107 | if (!summary) |
| 3108 | { |
| 3109 | if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0) |
| 3110 | { |
| 3111 | print_sys_errmsg (pip -> pathname, errno); |
| 3112 | error ("PIOCGFAULT failed"); |
| 3113 | } |
| 3114 | |
| 3115 | printf_filtered ("Current traced hardware fault set:\n\n"); |
| 3116 | printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace"); |
| 3117 | |
| 3118 | for (transp = faults_table; transp -> name != NULL; transp++) |
| 3119 | { |
| 3120 | QUIT; |
| 3121 | printf_filtered ("\t%-12s ", transp -> name); |
| 3122 | printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value) |
| 3123 | ? "on" : "off"); |
| 3124 | printf_filtered ("\n"); |
| 3125 | } |
| 3126 | printf_filtered ("\n"); |
| 3127 | } |
| 3128 | } |
| 3129 | |
| 3130 | static void |
| 3131 | info_proc_mappings (pip, summary) |
| 3132 | struct procinfo *pip; |
| 3133 | int summary; |
| 3134 | { |
| 3135 | int nmap; |
| 3136 | struct prmap *prmaps; |
| 3137 | struct prmap *prmap; |
| 3138 | |
| 3139 | if (!summary) |
| 3140 | { |
| 3141 | printf_filtered ("Mapped address spaces:\n\n"); |
| 3142 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
| 3143 | "Start Addr", |
| 3144 | " End Addr", |
| 3145 | " Size", |
| 3146 | " Offset", |
| 3147 | "Flags"); |
| 3148 | if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0) |
| 3149 | { |
| 3150 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 3151 | if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0) |
| 3152 | { |
| 3153 | for (prmap = prmaps; prmap -> pr_size; ++prmap) |
| 3154 | { |
| 3155 | printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n", |
| 3156 | prmap -> pr_vaddr, |
| 3157 | prmap -> pr_vaddr + prmap -> pr_size - 1, |
| 3158 | prmap -> pr_size, |
| 3159 | prmap -> pr_off, |
| 3160 | mappingflags (prmap -> pr_mflags)); |
| 3161 | } |
| 3162 | } |
| 3163 | } |
| 3164 | printf_filtered ("\n"); |
| 3165 | } |
| 3166 | } |
| 3167 | |
| 3168 | /* |
| 3169 | |
| 3170 | LOCAL FUNCTION |
| 3171 | |
| 3172 | info_proc -- implement the "info proc" command |
| 3173 | |
| 3174 | SYNOPSIS |
| 3175 | |
| 3176 | void info_proc (char *args, int from_tty) |
| 3177 | |
| 3178 | DESCRIPTION |
| 3179 | |
| 3180 | Implement gdb's "info proc" command by using the /proc interface |
| 3181 | to print status information about any currently running process. |
| 3182 | |
| 3183 | Examples of the use of "info proc" are: |
| 3184 | |
| 3185 | info proc (prints summary info for current inferior) |
| 3186 | info proc 123 (prints summary info for process with pid 123) |
| 3187 | info proc mappings (prints address mappings) |
| 3188 | info proc times (prints process/children times) |
| 3189 | info proc id (prints pid, ppid, gid, sid, etc) |
| 3190 | FIXME: i proc id not implemented. |
| 3191 | info proc status (prints general process state info) |
| 3192 | FIXME: i proc status not implemented. |
| 3193 | info proc signals (prints info about signal handling) |
| 3194 | info proc all (prints all info) |
| 3195 | |
| 3196 | */ |
| 3197 | |
| 3198 | static void |
| 3199 | info_proc (args, from_tty) |
| 3200 | char *args; |
| 3201 | int from_tty; |
| 3202 | { |
| 3203 | int pid; |
| 3204 | struct procinfo *pip; |
| 3205 | struct cleanup *old_chain; |
| 3206 | char **argv; |
| 3207 | int argsize; |
| 3208 | int summary = 1; |
| 3209 | int flags = 0; |
| 3210 | int syscalls = 0; |
| 3211 | int signals = 0; |
| 3212 | int faults = 0; |
| 3213 | int mappings = 0; |
| 3214 | int times = 0; |
| 3215 | int id = 0; |
| 3216 | int status = 0; |
| 3217 | int all = 0; |
| 3218 | |
| 3219 | old_chain = make_cleanup (null_cleanup, 0); |
| 3220 | |
| 3221 | /* Default to using the current inferior if no pid specified. Note |
| 3222 | that inferior_pid may be 0, hence we set okerr. */ |
| 3223 | |
| 3224 | pip = find_procinfo (inferior_pid, 1); |
| 3225 | |
| 3226 | if (args != NULL) |
| 3227 | { |
| 3228 | if ((argv = buildargv (args)) == NULL) |
| 3229 | { |
| 3230 | nomem (0); |
| 3231 | } |
| 3232 | make_cleanup (freeargv, (char *) argv); |
| 3233 | |
| 3234 | while (*argv != NULL) |
| 3235 | { |
| 3236 | argsize = strlen (*argv); |
| 3237 | if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0) |
| 3238 | { |
| 3239 | summary = 0; |
| 3240 | all = 1; |
| 3241 | } |
| 3242 | else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0) |
| 3243 | { |
| 3244 | summary = 0; |
| 3245 | faults = 1; |
| 3246 | } |
| 3247 | else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0) |
| 3248 | { |
| 3249 | summary = 0; |
| 3250 | flags = 1; |
| 3251 | } |
| 3252 | else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0) |
| 3253 | { |
| 3254 | summary = 0; |
| 3255 | id = 1; |
| 3256 | } |
| 3257 | else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0) |
| 3258 | { |
| 3259 | summary = 0; |
| 3260 | mappings = 1; |
| 3261 | } |
| 3262 | else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0) |
| 3263 | { |
| 3264 | summary = 0; |
| 3265 | signals = 1; |
| 3266 | } |
| 3267 | else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0) |
| 3268 | { |
| 3269 | summary = 0; |
| 3270 | status = 1; |
| 3271 | } |
| 3272 | else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0) |
| 3273 | { |
| 3274 | summary = 0; |
| 3275 | syscalls = 1; |
| 3276 | } |
| 3277 | else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0) |
| 3278 | { |
| 3279 | summary = 0; |
| 3280 | times = 1; |
| 3281 | } |
| 3282 | else if ((pid = atoi (*argv)) > 0) |
| 3283 | { |
| 3284 | pip = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
| 3285 | memset (pip, 0, sizeof (*pip)); |
| 3286 | |
| 3287 | pip->pid = pid; |
| 3288 | if (!open_proc_file (pid, pip, O_RDONLY)) |
| 3289 | { |
| 3290 | perror_with_name (pip -> pathname); |
| 3291 | /* NOTREACHED */ |
| 3292 | } |
| 3293 | make_cleanup (close_proc_file, pip); |
| 3294 | } |
| 3295 | else if (**argv != '\000') |
| 3296 | { |
| 3297 | error ("Unrecognized or ambiguous keyword `%s'.", *argv); |
| 3298 | } |
| 3299 | argv++; |
| 3300 | } |
| 3301 | } |
| 3302 | |
| 3303 | /* If we don't have a valid open process at this point, then we have no |
| 3304 | inferior or didn't specify a specific pid. */ |
| 3305 | |
| 3306 | if (!pip) |
| 3307 | { |
| 3308 | error ("\ |
| 3309 | No process. Start debugging a program or specify an explicit process ID."); |
| 3310 | } |
| 3311 | if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0) |
| 3312 | { |
| 3313 | print_sys_errmsg (pip -> pathname, errno); |
| 3314 | error ("PIOCSTATUS failed"); |
| 3315 | } |
| 3316 | |
| 3317 | /* Print verbose information of the requested type(s), or just a summary |
| 3318 | of the information for all types. */ |
| 3319 | |
| 3320 | printf_filtered ("\nInformation for %s:\n\n", pip -> pathname); |
| 3321 | if (summary || all || flags) |
| 3322 | { |
| 3323 | info_proc_flags (pip, summary); |
| 3324 | } |
| 3325 | if (summary || all) |
| 3326 | { |
| 3327 | info_proc_stop (pip, summary); |
| 3328 | } |
| 3329 | if (summary || all || signals || faults) |
| 3330 | { |
| 3331 | info_proc_siginfo (pip, summary); |
| 3332 | } |
| 3333 | if (summary || all || syscalls) |
| 3334 | { |
| 3335 | info_proc_syscalls (pip, summary); |
| 3336 | } |
| 3337 | if (summary || all || mappings) |
| 3338 | { |
| 3339 | info_proc_mappings (pip, summary); |
| 3340 | } |
| 3341 | if (summary || all || signals) |
| 3342 | { |
| 3343 | info_proc_signals (pip, summary); |
| 3344 | } |
| 3345 | if (summary || all || faults) |
| 3346 | { |
| 3347 | info_proc_faults (pip, summary); |
| 3348 | } |
| 3349 | printf_filtered ("\n"); |
| 3350 | |
| 3351 | /* All done, deal with closing any temporary process info structure, |
| 3352 | freeing temporary memory , etc. */ |
| 3353 | |
| 3354 | do_cleanups (old_chain); |
| 3355 | } |
| 3356 | |
| 3357 | /* |
| 3358 | |
| 3359 | LOCAL FUNCTION |
| 3360 | |
| 3361 | procfs_set_sproc_trap -- arrange for exec'd child stop on sproc |
| 3362 | |
| 3363 | SYNOPSIS |
| 3364 | |
| 3365 | void procfs_set_sproc_trap (void) |
| 3366 | |
| 3367 | DESCRIPTION |
| 3368 | |
| 3369 | This function sets up a trap on sproc system call exits so that we can |
| 3370 | detect the arrival of a new thread. We are called with the child |
| 3371 | stopped prior to it's first instruction. |
| 3372 | |
| 3373 | Also note that we turn on the inherit-on-fork flag in the child process |
| 3374 | so that any grand-children start with all tracing flags set. |
| 3375 | */ |
| 3376 | |
| 3377 | #ifdef SYS_sproc |
| 3378 | |
| 3379 | static void |
| 3380 | procfs_set_sproc_trap (pi) |
| 3381 | struct procinfo *pi; |
| 3382 | { |
| 3383 | sysset_t exitset; |
| 3384 | |
| 3385 | if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0) |
| 3386 | { |
| 3387 | print_sys_errmsg (pi->pathname, errno); |
| 3388 | error ("PIOCGEXIT failed"); |
| 3389 | } |
| 3390 | |
| 3391 | praddset (&exitset, SYS_sproc); |
| 3392 | |
| 3393 | if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0) |
| 3394 | { |
| 3395 | print_sys_errmsg (pi->pathname, errno); |
| 3396 | error ("PIOCSEXIT failed"); |
| 3397 | } |
| 3398 | |
| 3399 | /* Turn on inherit-on-fork flag so that all grand-children of gdb start with |
| 3400 | tracing flags set. */ |
| 3401 | |
| 3402 | #ifdef PIOCSET /* New method */ |
| 3403 | { |
| 3404 | long pr_flags; |
| 3405 | pr_flags = PR_FORK; |
| 3406 | ioctl (pi->fd, PIOCSET, &pr_flags); |
| 3407 | } |
| 3408 | #else |
| 3409 | #ifdef PIOCSFORK /* Original method */ |
| 3410 | ioctl (pi->fd, PIOCSFORK, NULL); |
| 3411 | #endif |
| 3412 | #endif |
| 3413 | } |
| 3414 | #endif /* SYS_sproc */ |
| 3415 | |
| 3416 | /* Fork an inferior process, and start debugging it with /proc. */ |
| 3417 | |
| 3418 | static void |
| 3419 | procfs_create_inferior (exec_file, allargs, env) |
| 3420 | char *exec_file; |
| 3421 | char *allargs; |
| 3422 | char **env; |
| 3423 | { |
| 3424 | char *shell_file = getenv ("SHELL"); |
| 3425 | char *tryname; |
| 3426 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
| 3427 | { |
| 3428 | |
| 3429 | /* We will be looking down the PATH to find shell_file. If we |
| 3430 | just do this the normal way (via execlp, which operates by |
| 3431 | attempting an exec for each element of the PATH until it |
| 3432 | finds one which succeeds), then there will be an exec for |
| 3433 | each failed attempt, each of which will cause a PR_SYSEXIT |
| 3434 | stop, and we won't know how to distinguish the PR_SYSEXIT's |
| 3435 | for these failed execs with the ones for successful execs |
| 3436 | (whether the exec has succeeded is stored at that time in the |
| 3437 | carry bit or some such architecture-specific and |
| 3438 | non-ABI-specified place). |
| 3439 | |
| 3440 | So I can't think of anything better than to search the PATH |
| 3441 | now. This has several disadvantages: (1) There is a race |
| 3442 | condition; if we find a file now and it is deleted before we |
| 3443 | exec it, we lose, even if the deletion leaves a valid file |
| 3444 | further down in the PATH, (2) there is no way to know exactly |
| 3445 | what an executable (in the sense of "capable of being |
| 3446 | exec'd") file is. Using access() loses because it may lose |
| 3447 | if the caller is the superuser; failing to use it loses if |
| 3448 | there are ACLs or some such. */ |
| 3449 | |
| 3450 | char *p; |
| 3451 | char *p1; |
| 3452 | /* FIXME-maybe: might want "set path" command to replace putenv hack |
| 3453 | in set_in_environ. */ |
| 3454 | char *path = getenv ("PATH"); |
| 3455 | int len; |
| 3456 | struct stat statbuf; |
| 3457 | |
| 3458 | if (path == NULL) |
| 3459 | path = "/bin:/usr/bin"; |
| 3460 | |
| 3461 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); |
| 3462 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
| 3463 | { |
| 3464 | p1 = strchr (p, ':'); |
| 3465 | if (p1 != NULL) |
| 3466 | len = p1 - p; |
| 3467 | else |
| 3468 | len = strlen (p); |
| 3469 | strncpy (tryname, p, len); |
| 3470 | tryname[len] = '\0'; |
| 3471 | strcat (tryname, "/"); |
| 3472 | strcat (tryname, shell_file); |
| 3473 | if (access (tryname, X_OK) < 0) |
| 3474 | continue; |
| 3475 | if (stat (tryname, &statbuf) < 0) |
| 3476 | continue; |
| 3477 | if (!S_ISREG (statbuf.st_mode)) |
| 3478 | /* We certainly need to reject directories. I'm not quite |
| 3479 | as sure about FIFOs, sockets, etc., but I kind of doubt |
| 3480 | that people want to exec() these things. */ |
| 3481 | continue; |
| 3482 | break; |
| 3483 | } |
| 3484 | if (p == NULL) |
| 3485 | /* Not found. This must be an error rather than merely passing |
| 3486 | the file to execlp(), because execlp() would try all the |
| 3487 | exec()s, causing GDB to get confused. */ |
| 3488 | error ("Can't find shell %s in PATH", shell_file); |
| 3489 | |
| 3490 | shell_file = tryname; |
| 3491 | } |
| 3492 | |
| 3493 | fork_inferior (exec_file, allargs, env, |
| 3494 | proc_set_exec_trap, procfs_init_inferior, shell_file); |
| 3495 | |
| 3496 | /* We are at the first instruction we care about. */ |
| 3497 | /* Pedal to the metal... */ |
| 3498 | |
| 3499 | /* Setup traps on exit from sproc() */ |
| 3500 | |
| 3501 | #ifdef SYS_sproc |
| 3502 | procfs_set_sproc_trap (current_procinfo); |
| 3503 | #endif |
| 3504 | |
| 3505 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
| 3506 | } |
| 3507 | |
| 3508 | /* Clean up after the inferior dies. */ |
| 3509 | |
| 3510 | static void |
| 3511 | procfs_mourn_inferior () |
| 3512 | { |
| 3513 | struct procinfo *pi; |
| 3514 | |
| 3515 | for (pi = procinfo_list; pi; pi = pi->next) |
| 3516 | unconditionally_kill_inferior (pi); |
| 3517 | |
| 3518 | unpush_target (&procfs_ops); |
| 3519 | generic_mourn_inferior (); |
| 3520 | } |
| 3521 | |
| 3522 | /* Mark our target-struct as eligible for stray "run" and "attach" commands. */ |
| 3523 | static int |
| 3524 | procfs_can_run () |
| 3525 | { |
| 3526 | return(1); |
| 3527 | } |
| 3528 | \f |
| 3529 | struct target_ops procfs_ops = { |
| 3530 | "procfs", /* to_shortname */ |
| 3531 | "Unix /proc child process", /* to_longname */ |
| 3532 | "Unix /proc child process (started by the \"run\" command).", /* to_doc */ |
| 3533 | procfs_open, /* to_open */ |
| 3534 | 0, /* to_close */ |
| 3535 | procfs_attach, /* to_attach */ |
| 3536 | procfs_detach, /* to_detach */ |
| 3537 | procfs_resume, /* to_resume */ |
| 3538 | procfs_wait, /* to_wait */ |
| 3539 | procfs_fetch_registers, /* to_fetch_registers */ |
| 3540 | procfs_store_registers, /* to_store_registers */ |
| 3541 | procfs_prepare_to_store, /* to_prepare_to_store */ |
| 3542 | procfs_xfer_memory, /* to_xfer_memory */ |
| 3543 | procfs_files_info, /* to_files_info */ |
| 3544 | memory_insert_breakpoint, /* to_insert_breakpoint */ |
| 3545 | memory_remove_breakpoint, /* to_remove_breakpoint */ |
| 3546 | terminal_init_inferior, /* to_terminal_init */ |
| 3547 | terminal_inferior, /* to_terminal_inferior */ |
| 3548 | terminal_ours_for_output, /* to_terminal_ours_for_output */ |
| 3549 | terminal_ours, /* to_terminal_ours */ |
| 3550 | child_terminal_info, /* to_terminal_info */ |
| 3551 | procfs_kill_inferior, /* to_kill */ |
| 3552 | 0, /* to_load */ |
| 3553 | 0, /* to_lookup_symbol */ |
| 3554 | procfs_create_inferior, /* to_create_inferior */ |
| 3555 | procfs_mourn_inferior, /* to_mourn_inferior */ |
| 3556 | procfs_can_run, /* to_can_run */ |
| 3557 | procfs_notice_signals, /* to_notice_signals */ |
| 3558 | process_stratum, /* to_stratum */ |
| 3559 | 0, /* to_next */ |
| 3560 | 1, /* to_has_all_memory */ |
| 3561 | 1, /* to_has_memory */ |
| 3562 | 1, /* to_has_stack */ |
| 3563 | 1, /* to_has_registers */ |
| 3564 | 1, /* to_has_execution */ |
| 3565 | 0, /* sections */ |
| 3566 | 0, /* sections_end */ |
| 3567 | OPS_MAGIC /* to_magic */ |
| 3568 | }; |
| 3569 | |
| 3570 | void |
| 3571 | _initialize_procfs () |
| 3572 | { |
| 3573 | add_target (&procfs_ops); |
| 3574 | |
| 3575 | add_info ("proc", info_proc, |
| 3576 | "Show process status information using /proc entry.\n\ |
| 3577 | Specify process id or use current inferior by default.\n\ |
| 3578 | Specify keywords for detailed information; default is summary.\n\ |
| 3579 | Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\ |
| 3580 | `status', `syscalls', and `times'.\n\ |
| 3581 | Unambiguous abbreviations may be used."); |
| 3582 | |
| 3583 | init_syscall_table (); |
| 3584 | } |