| 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
| 2 | Copyright 1991, 1992, 1993, 1994, 1995 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/fault.h> |
| 40 | #include <sys/syscall.h> |
| 41 | #include <sys/procfs.h> |
| 42 | #include <fcntl.h> |
| 43 | #include <errno.h> |
| 44 | #include <string.h> |
| 45 | #include <stropts.h> |
| 46 | #include <poll.h> |
| 47 | #include <unistd.h> |
| 48 | #include <sys/stat.h> |
| 49 | |
| 50 | #include "inferior.h" |
| 51 | #include "target.h" |
| 52 | #include "command.h" |
| 53 | #include "gdbcore.h" |
| 54 | #include "thread.h" |
| 55 | |
| 56 | #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */ |
| 57 | |
| 58 | #ifndef PROC_NAME_FMT |
| 59 | #define PROC_NAME_FMT "/proc/%05d" |
| 60 | #endif |
| 61 | |
| 62 | extern struct target_ops procfs_ops; /* Forward declaration */ |
| 63 | |
| 64 | #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */ |
| 65 | CORE_ADDR kernel_u_addr; |
| 66 | #endif |
| 67 | |
| 68 | #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */ |
| 69 | #undef si_pid |
| 70 | #define si_pid _data._proc.pid |
| 71 | #undef si_uid |
| 72 | #define si_uid _data._proc._pdata._kill.uid |
| 73 | #endif /* BROKEN_SIGINFO_H */ |
| 74 | |
| 75 | /* All access to the inferior, either one started by gdb or one that has |
| 76 | been attached to, is controlled by an instance of a procinfo structure, |
| 77 | defined below. Since gdb currently only handles one inferior at a time, |
| 78 | the procinfo structure for the inferior is statically allocated and |
| 79 | only one exists at any given time. There is a separate procinfo |
| 80 | structure for use by the "info proc" command, so that we can print |
| 81 | useful information about any random process without interfering with |
| 82 | the inferior's procinfo information. */ |
| 83 | |
| 84 | struct procinfo { |
| 85 | struct procinfo *next; |
| 86 | int pid; /* Process ID of inferior */ |
| 87 | int fd; /* File descriptor for /proc entry */ |
| 88 | char *pathname; /* Pathname to /proc entry */ |
| 89 | int had_event; /* poll/select says something happened */ |
| 90 | int was_stopped; /* Nonzero if was stopped prior to attach */ |
| 91 | int nopass_next_sigstop; /* Don't pass a sigstop on next resume */ |
| 92 | prrun_t prrun; /* Control state when it is run */ |
| 93 | prstatus_t prstatus; /* Current process status info */ |
| 94 | gregset_t gregset; /* General register set */ |
| 95 | fpregset_t fpregset; /* Floating point register set */ |
| 96 | fltset_t fltset; /* Current traced hardware fault set */ |
| 97 | sigset_t trace; /* Current traced signal set */ |
| 98 | sysset_t exitset; /* Current traced system call exit set */ |
| 99 | sysset_t entryset; /* Current traced system call entry set */ |
| 100 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
| 101 | sigset_t saved_trace; /* Saved traced signal set */ |
| 102 | sigset_t saved_sighold; /* Saved held signal set */ |
| 103 | sysset_t saved_exitset; /* Saved traced system call exit set */ |
| 104 | sysset_t saved_entryset; /* Saved traced system call entry set */ |
| 105 | }; |
| 106 | |
| 107 | /* List of inferior process information */ |
| 108 | static struct procinfo *procinfo_list = NULL; |
| 109 | |
| 110 | static struct pollfd *poll_list; /* pollfds used for waiting on /proc */ |
| 111 | |
| 112 | static int num_poll_list = 0; /* Number of entries in poll_list */ |
| 113 | |
| 114 | static int last_resume_pid = -1; /* Last pid used with procfs_resume */ |
| 115 | |
| 116 | /* Much of the information used in the /proc interface, particularly for |
| 117 | printing status information, is kept as tables of structures of the |
| 118 | following form. These tables can be used to map numeric values to |
| 119 | their symbolic names and to a string that describes their specific use. */ |
| 120 | |
| 121 | struct trans { |
| 122 | int value; /* The numeric value */ |
| 123 | char *name; /* The equivalent symbolic value */ |
| 124 | char *desc; /* Short description of value */ |
| 125 | }; |
| 126 | |
| 127 | /* Translate bits in the pr_flags member of the prstatus structure, into the |
| 128 | names and desc information. */ |
| 129 | |
| 130 | static struct trans pr_flag_table[] = |
| 131 | { |
| 132 | #if defined (PR_STOPPED) |
| 133 | { PR_STOPPED, "PR_STOPPED", "Process is stopped" }, |
| 134 | #endif |
| 135 | #if defined (PR_ISTOP) |
| 136 | { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" }, |
| 137 | #endif |
| 138 | #if defined (PR_DSTOP) |
| 139 | { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" }, |
| 140 | #endif |
| 141 | #if defined (PR_ASLEEP) |
| 142 | { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" }, |
| 143 | #endif |
| 144 | #if defined (PR_FORK) |
| 145 | { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" }, |
| 146 | #endif |
| 147 | #if defined (PR_RLC) |
| 148 | { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" }, |
| 149 | #endif |
| 150 | #if defined (PR_PTRACE) |
| 151 | { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" }, |
| 152 | #endif |
| 153 | #if defined (PR_PCINVAL) |
| 154 | { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" }, |
| 155 | #endif |
| 156 | #if defined (PR_ISSYS) |
| 157 | { PR_ISSYS, "PR_ISSYS", "Is a system process" }, |
| 158 | #endif |
| 159 | #if defined (PR_STEP) |
| 160 | { PR_STEP, "PR_STEP", "Process has single step pending" }, |
| 161 | #endif |
| 162 | #if defined (PR_KLC) |
| 163 | { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" }, |
| 164 | #endif |
| 165 | #if defined (PR_ASYNC) |
| 166 | { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" }, |
| 167 | #endif |
| 168 | #if defined (PR_PCOMPAT) |
| 169 | { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" }, |
| 170 | #endif |
| 171 | { 0, NULL, NULL } |
| 172 | }; |
| 173 | |
| 174 | /* Translate values in the pr_why field of the prstatus struct. */ |
| 175 | |
| 176 | static struct trans pr_why_table[] = |
| 177 | { |
| 178 | #if defined (PR_REQUESTED) |
| 179 | { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" }, |
| 180 | #endif |
| 181 | #if defined (PR_SIGNALLED) |
| 182 | { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" }, |
| 183 | #endif |
| 184 | #if defined (PR_FAULTED) |
| 185 | { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" }, |
| 186 | #endif |
| 187 | #if defined (PR_SYSENTRY) |
| 188 | { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" }, |
| 189 | #endif |
| 190 | #if defined (PR_SYSEXIT) |
| 191 | { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" }, |
| 192 | #endif |
| 193 | #if defined (PR_JOBCONTROL) |
| 194 | { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" }, |
| 195 | #endif |
| 196 | #if defined (PR_SUSPENDED) |
| 197 | { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" }, |
| 198 | #endif |
| 199 | { 0, NULL, NULL } |
| 200 | }; |
| 201 | |
| 202 | /* Hardware fault translation table. */ |
| 203 | |
| 204 | static struct trans faults_table[] = |
| 205 | { |
| 206 | #if defined (FLTILL) |
| 207 | { FLTILL, "FLTILL", "Illegal instruction" }, |
| 208 | #endif |
| 209 | #if defined (FLTPRIV) |
| 210 | { FLTPRIV, "FLTPRIV", "Privileged instruction" }, |
| 211 | #endif |
| 212 | #if defined (FLTBPT) |
| 213 | { FLTBPT, "FLTBPT", "Breakpoint trap" }, |
| 214 | #endif |
| 215 | #if defined (FLTTRACE) |
| 216 | { FLTTRACE, "FLTTRACE", "Trace trap" }, |
| 217 | #endif |
| 218 | #if defined (FLTACCESS) |
| 219 | { FLTACCESS, "FLTACCESS", "Memory access fault" }, |
| 220 | #endif |
| 221 | #if defined (FLTBOUNDS) |
| 222 | { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" }, |
| 223 | #endif |
| 224 | #if defined (FLTIOVF) |
| 225 | { FLTIOVF, "FLTIOVF", "Integer overflow" }, |
| 226 | #endif |
| 227 | #if defined (FLTIZDIV) |
| 228 | { FLTIZDIV, "FLTIZDIV", "Integer zero divide" }, |
| 229 | #endif |
| 230 | #if defined (FLTFPE) |
| 231 | { FLTFPE, "FLTFPE", "Floating-point exception" }, |
| 232 | #endif |
| 233 | #if defined (FLTSTACK) |
| 234 | { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" }, |
| 235 | #endif |
| 236 | #if defined (FLTPAGE) |
| 237 | { FLTPAGE, "FLTPAGE", "Recoverable page fault" }, |
| 238 | #endif |
| 239 | { 0, NULL, NULL } |
| 240 | }; |
| 241 | |
| 242 | /* Translation table for signal generation information. See UNIX System |
| 243 | V Release 4 Programmer's Reference Manual, siginfo(5). */ |
| 244 | |
| 245 | static struct sigcode { |
| 246 | int signo; |
| 247 | int code; |
| 248 | char *codename; |
| 249 | char *desc; |
| 250 | } siginfo_table[] = { |
| 251 | #if defined (SIGILL) && defined (ILL_ILLOPC) |
| 252 | { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" }, |
| 253 | #endif |
| 254 | #if defined (SIGILL) && defined (ILL_ILLOPN) |
| 255 | { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", }, |
| 256 | #endif |
| 257 | #if defined (SIGILL) && defined (ILL_ILLADR) |
| 258 | { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" }, |
| 259 | #endif |
| 260 | #if defined (SIGILL) && defined (ILL_ILLTRP) |
| 261 | { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" }, |
| 262 | #endif |
| 263 | #if defined (SIGILL) && defined (ILL_PRVOPC) |
| 264 | { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" }, |
| 265 | #endif |
| 266 | #if defined (SIGILL) && defined (ILL_PRVREG) |
| 267 | { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" }, |
| 268 | #endif |
| 269 | #if defined (SIGILL) && defined (ILL_COPROC) |
| 270 | { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" }, |
| 271 | #endif |
| 272 | #if defined (SIGILL) && defined (ILL_BADSTK) |
| 273 | { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" }, |
| 274 | #endif |
| 275 | #if defined (SIGFPE) && defined (FPE_INTDIV) |
| 276 | { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" }, |
| 277 | #endif |
| 278 | #if defined (SIGFPE) && defined (FPE_INTOVF) |
| 279 | { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" }, |
| 280 | #endif |
| 281 | #if defined (SIGFPE) && defined (FPE_FLTDIV) |
| 282 | { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" }, |
| 283 | #endif |
| 284 | #if defined (SIGFPE) && defined (FPE_FLTOVF) |
| 285 | { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" }, |
| 286 | #endif |
| 287 | #if defined (SIGFPE) && defined (FPE_FLTUND) |
| 288 | { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" }, |
| 289 | #endif |
| 290 | #if defined (SIGFPE) && defined (FPE_FLTRES) |
| 291 | { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" }, |
| 292 | #endif |
| 293 | #if defined (SIGFPE) && defined (FPE_FLTINV) |
| 294 | { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" }, |
| 295 | #endif |
| 296 | #if defined (SIGFPE) && defined (FPE_FLTSUB) |
| 297 | { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" }, |
| 298 | #endif |
| 299 | #if defined (SIGSEGV) && defined (SEGV_MAPERR) |
| 300 | { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" }, |
| 301 | #endif |
| 302 | #if defined (SIGSEGV) && defined (SEGV_ACCERR) |
| 303 | { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" }, |
| 304 | #endif |
| 305 | #if defined (SIGBUS) && defined (BUS_ADRALN) |
| 306 | { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" }, |
| 307 | #endif |
| 308 | #if defined (SIGBUS) && defined (BUS_ADRERR) |
| 309 | { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" }, |
| 310 | #endif |
| 311 | #if defined (SIGBUS) && defined (BUS_OBJERR) |
| 312 | { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" }, |
| 313 | #endif |
| 314 | #if defined (SIGTRAP) && defined (TRAP_BRKPT) |
| 315 | { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" }, |
| 316 | #endif |
| 317 | #if defined (SIGTRAP) && defined (TRAP_TRACE) |
| 318 | { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" }, |
| 319 | #endif |
| 320 | #if defined (SIGCLD) && defined (CLD_EXITED) |
| 321 | { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" }, |
| 322 | #endif |
| 323 | #if defined (SIGCLD) && defined (CLD_KILLED) |
| 324 | { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" }, |
| 325 | #endif |
| 326 | #if defined (SIGCLD) && defined (CLD_DUMPED) |
| 327 | { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" }, |
| 328 | #endif |
| 329 | #if defined (SIGCLD) && defined (CLD_TRAPPED) |
| 330 | { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" }, |
| 331 | #endif |
| 332 | #if defined (SIGCLD) && defined (CLD_STOPPED) |
| 333 | { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" }, |
| 334 | #endif |
| 335 | #if defined (SIGCLD) && defined (CLD_CONTINUED) |
| 336 | { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" }, |
| 337 | #endif |
| 338 | #if defined (SIGPOLL) && defined (POLL_IN) |
| 339 | { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" }, |
| 340 | #endif |
| 341 | #if defined (SIGPOLL) && defined (POLL_OUT) |
| 342 | { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" }, |
| 343 | #endif |
| 344 | #if defined (SIGPOLL) && defined (POLL_MSG) |
| 345 | { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" }, |
| 346 | #endif |
| 347 | #if defined (SIGPOLL) && defined (POLL_ERR) |
| 348 | { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" }, |
| 349 | #endif |
| 350 | #if defined (SIGPOLL) && defined (POLL_PRI) |
| 351 | { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" }, |
| 352 | #endif |
| 353 | #if defined (SIGPOLL) && defined (POLL_HUP) |
| 354 | { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" }, |
| 355 | #endif |
| 356 | { 0, 0, NULL, NULL } |
| 357 | }; |
| 358 | |
| 359 | static char *syscall_table[MAX_SYSCALLS]; |
| 360 | |
| 361 | /* Prototypes for local functions */ |
| 362 | |
| 363 | static void set_proc_siginfo PARAMS ((struct procinfo *, int)); |
| 364 | |
| 365 | static void init_syscall_table PARAMS ((void)); |
| 366 | |
| 367 | static char *syscallname PARAMS ((int)); |
| 368 | |
| 369 | static char *signalname PARAMS ((int)); |
| 370 | |
| 371 | static char *errnoname PARAMS ((int)); |
| 372 | |
| 373 | static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int)); |
| 374 | |
| 375 | static int open_proc_file PARAMS ((int, struct procinfo *, int)); |
| 376 | |
| 377 | static void close_proc_file PARAMS ((struct procinfo *)); |
| 378 | |
| 379 | static void unconditionally_kill_inferior PARAMS ((struct procinfo *)); |
| 380 | |
| 381 | static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *)) ATTR_NORETURN; |
| 382 | |
| 383 | static void info_proc PARAMS ((char *, int)); |
| 384 | |
| 385 | static void info_proc_flags PARAMS ((struct procinfo *, int)); |
| 386 | |
| 387 | static void info_proc_stop PARAMS ((struct procinfo *, int)); |
| 388 | |
| 389 | static void info_proc_siginfo PARAMS ((struct procinfo *, int)); |
| 390 | |
| 391 | static void info_proc_syscalls PARAMS ((struct procinfo *, int)); |
| 392 | |
| 393 | static void info_proc_mappings PARAMS ((struct procinfo *, int)); |
| 394 | |
| 395 | static void info_proc_signals PARAMS ((struct procinfo *, int)); |
| 396 | |
| 397 | static void info_proc_faults PARAMS ((struct procinfo *, int)); |
| 398 | |
| 399 | static char *mappingflags PARAMS ((long)); |
| 400 | |
| 401 | static char *lookupname PARAMS ((struct trans *, unsigned int, char *)); |
| 402 | |
| 403 | static char *lookupdesc PARAMS ((struct trans *, unsigned int)); |
| 404 | |
| 405 | static int do_attach PARAMS ((int pid)); |
| 406 | |
| 407 | static void do_detach PARAMS ((int siggnal)); |
| 408 | |
| 409 | static void procfs_create_inferior PARAMS ((char *, char *, char **)); |
| 410 | |
| 411 | static void procfs_notice_signals PARAMS ((int pid)); |
| 412 | |
| 413 | static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail)); |
| 414 | |
| 415 | /* External function prototypes that can't be easily included in any |
| 416 | header file because the args are typedefs in system include files. */ |
| 417 | |
| 418 | extern void supply_gregset PARAMS ((gregset_t *)); |
| 419 | |
| 420 | extern void fill_gregset PARAMS ((gregset_t *, int)); |
| 421 | |
| 422 | extern void supply_fpregset PARAMS ((fpregset_t *)); |
| 423 | |
| 424 | extern void fill_fpregset PARAMS ((fpregset_t *, int)); |
| 425 | |
| 426 | /* |
| 427 | |
| 428 | LOCAL FUNCTION |
| 429 | |
| 430 | find_procinfo -- convert a process id to a struct procinfo |
| 431 | |
| 432 | SYNOPSIS |
| 433 | |
| 434 | static struct procinfo * find_procinfo (pid_t pid, int okfail); |
| 435 | |
| 436 | DESCRIPTION |
| 437 | |
| 438 | Given a process id, look it up in the procinfo chain. Returns |
| 439 | a struct procinfo *. If can't find pid, then call error(), |
| 440 | unless okfail is set, in which case, return NULL; |
| 441 | */ |
| 442 | |
| 443 | static struct procinfo * |
| 444 | find_procinfo (pid, okfail) |
| 445 | pid_t pid; |
| 446 | int okfail; |
| 447 | { |
| 448 | struct procinfo *procinfo; |
| 449 | |
| 450 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 451 | if (procinfo->pid == pid) |
| 452 | return procinfo; |
| 453 | |
| 454 | if (okfail) |
| 455 | return NULL; |
| 456 | |
| 457 | error ("procfs (find_procinfo): Couldn't locate pid %d", pid); |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | |
| 462 | LOCAL MACRO |
| 463 | |
| 464 | current_procinfo -- convert inferior_pid to a struct procinfo |
| 465 | |
| 466 | SYNOPSIS |
| 467 | |
| 468 | static struct procinfo * current_procinfo; |
| 469 | |
| 470 | DESCRIPTION |
| 471 | |
| 472 | Looks up inferior_pid in the procinfo chain. Always returns a |
| 473 | struct procinfo *. If process can't be found, we error() out. |
| 474 | */ |
| 475 | |
| 476 | #define current_procinfo find_procinfo (inferior_pid, 0) |
| 477 | |
| 478 | /* |
| 479 | |
| 480 | LOCAL FUNCTION |
| 481 | |
| 482 | add_fd -- Add the fd to the poll/select list |
| 483 | |
| 484 | SYNOPSIS |
| 485 | |
| 486 | static void add_fd (struct procinfo *); |
| 487 | |
| 488 | DESCRIPTION |
| 489 | |
| 490 | Add the fd of the supplied procinfo to the list of fds used for |
| 491 | poll/select operations. |
| 492 | */ |
| 493 | |
| 494 | static void |
| 495 | add_fd (pi) |
| 496 | struct procinfo *pi; |
| 497 | { |
| 498 | if (num_poll_list <= 0) |
| 499 | poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd)); |
| 500 | else |
| 501 | poll_list = (struct pollfd *) xrealloc (poll_list, |
| 502 | (num_poll_list + 1) |
| 503 | * sizeof (struct pollfd)); |
| 504 | poll_list[num_poll_list].fd = pi->fd; |
| 505 | poll_list[num_poll_list].events = POLLPRI; |
| 506 | |
| 507 | num_poll_list++; |
| 508 | } |
| 509 | |
| 510 | static void |
| 511 | remove_fd (pi) |
| 512 | struct procinfo *pi; |
| 513 | { |
| 514 | int i; |
| 515 | |
| 516 | for (i = 0; i < num_poll_list; i++) |
| 517 | { |
| 518 | if (poll_list[i].fd == pi->fd) |
| 519 | { |
| 520 | if (i != num_poll_list - 1) |
| 521 | memcpy (poll_list, poll_list + i + 1, |
| 522 | (num_poll_list - i - 1) * sizeof (struct pollfd)); |
| 523 | |
| 524 | num_poll_list--; |
| 525 | |
| 526 | if (num_poll_list == 0) |
| 527 | free (poll_list); |
| 528 | else |
| 529 | poll_list = (struct pollfd *) xrealloc (poll_list, |
| 530 | num_poll_list |
| 531 | * sizeof (struct pollfd)); |
| 532 | return; |
| 533 | } |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | #define LOSING_POLL unixware_sux |
| 538 | |
| 539 | static struct procinfo * |
| 540 | wait_fd () |
| 541 | { |
| 542 | struct procinfo *pi; |
| 543 | int num_fds; |
| 544 | int i; |
| 545 | |
| 546 | set_sigint_trap (); /* Causes SIGINT to be passed on to the |
| 547 | attached process. */ |
| 548 | set_sigio_trap (); |
| 549 | |
| 550 | #ifndef LOSING_POLL |
| 551 | num_fds = poll (poll_list, num_poll_list, -1); |
| 552 | #else |
| 553 | pi = current_procinfo; |
| 554 | |
| 555 | while (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) |
| 556 | { |
| 557 | if (errno == ENOENT) |
| 558 | { |
| 559 | /* Process exited. */ |
| 560 | pi->prstatus.pr_flags = 0; |
| 561 | break; |
| 562 | } |
| 563 | else if (errno != EINTR) |
| 564 | { |
| 565 | print_sys_errmsg (pi->pathname, errno); |
| 566 | error ("PIOCWSTOP failed"); |
| 567 | } |
| 568 | } |
| 569 | pi->had_event = 1; |
| 570 | #endif |
| 571 | |
| 572 | clear_sigint_trap (); |
| 573 | clear_sigio_trap (); |
| 574 | |
| 575 | #ifndef LOSING_POLL |
| 576 | |
| 577 | if (num_fds <= 0) |
| 578 | { |
| 579 | print_sys_errmsg ("poll failed\n", errno); |
| 580 | error ("Poll failed, returned %d", num_fds); |
| 581 | } |
| 582 | |
| 583 | for (i = 0; i < num_poll_list && num_fds > 0; i++) |
| 584 | { |
| 585 | if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0) |
| 586 | continue; |
| 587 | for (pi = procinfo_list; pi; pi = pi->next) |
| 588 | { |
| 589 | if (poll_list[i].fd == pi->fd) |
| 590 | { |
| 591 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
| 592 | { |
| 593 | print_sys_errmsg (pi->pathname, errno); |
| 594 | error ("PIOCSTATUS failed"); |
| 595 | } |
| 596 | num_fds--; |
| 597 | pi->had_event = 1; |
| 598 | break; |
| 599 | } |
| 600 | } |
| 601 | if (!pi) |
| 602 | error ("procfs_wait: Couldn't find procinfo for fd %d\n", |
| 603 | poll_list[i].fd); |
| 604 | } |
| 605 | #endif /* LOSING_POLL */ |
| 606 | |
| 607 | return pi; |
| 608 | } |
| 609 | |
| 610 | /* |
| 611 | |
| 612 | LOCAL FUNCTION |
| 613 | |
| 614 | lookupdesc -- translate a value to a summary desc string |
| 615 | |
| 616 | SYNOPSIS |
| 617 | |
| 618 | static char *lookupdesc (struct trans *transp, unsigned int val); |
| 619 | |
| 620 | DESCRIPTION |
| 621 | |
| 622 | Given a pointer to a translation table and a value to be translated, |
| 623 | lookup the desc string and return it. |
| 624 | */ |
| 625 | |
| 626 | static char * |
| 627 | lookupdesc (transp, val) |
| 628 | struct trans *transp; |
| 629 | unsigned int val; |
| 630 | { |
| 631 | char *desc; |
| 632 | |
| 633 | for (desc = NULL; transp -> name != NULL; transp++) |
| 634 | { |
| 635 | if (transp -> value == val) |
| 636 | { |
| 637 | desc = transp -> desc; |
| 638 | break; |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | /* Didn't find a translation for the specified value, set a default one. */ |
| 643 | |
| 644 | if (desc == NULL) |
| 645 | { |
| 646 | desc = "Unknown"; |
| 647 | } |
| 648 | return (desc); |
| 649 | } |
| 650 | |
| 651 | /* |
| 652 | |
| 653 | LOCAL FUNCTION |
| 654 | |
| 655 | lookupname -- translate a value to symbolic name |
| 656 | |
| 657 | SYNOPSIS |
| 658 | |
| 659 | static char *lookupname (struct trans *transp, unsigned int val, |
| 660 | char *prefix); |
| 661 | |
| 662 | DESCRIPTION |
| 663 | |
| 664 | Given a pointer to a translation table, a value to be translated, |
| 665 | and a default prefix to return if the value can't be translated, |
| 666 | match the value with one of the translation table entries and |
| 667 | return a pointer to the symbolic name. |
| 668 | |
| 669 | If no match is found it just returns the value as a printable string, |
| 670 | with the given prefix. The previous such value, if any, is freed |
| 671 | at this time. |
| 672 | */ |
| 673 | |
| 674 | static char * |
| 675 | lookupname (transp, val, prefix) |
| 676 | struct trans *transp; |
| 677 | unsigned int val; |
| 678 | char *prefix; |
| 679 | { |
| 680 | static char *locbuf; |
| 681 | char *name; |
| 682 | |
| 683 | for (name = NULL; transp -> name != NULL; transp++) |
| 684 | { |
| 685 | if (transp -> value == val) |
| 686 | { |
| 687 | name = transp -> name; |
| 688 | break; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | /* Didn't find a translation for the specified value, build a default |
| 693 | one using the specified prefix and return it. The lifetime of |
| 694 | the value is only until the next one is needed. */ |
| 695 | |
| 696 | if (name == NULL) |
| 697 | { |
| 698 | if (locbuf != NULL) |
| 699 | { |
| 700 | free (locbuf); |
| 701 | } |
| 702 | locbuf = xmalloc (strlen (prefix) + 16); |
| 703 | sprintf (locbuf, "%s %u", prefix, val); |
| 704 | name = locbuf; |
| 705 | } |
| 706 | return (name); |
| 707 | } |
| 708 | |
| 709 | static char * |
| 710 | sigcodename (sip) |
| 711 | siginfo_t *sip; |
| 712 | { |
| 713 | struct sigcode *scp; |
| 714 | char *name = NULL; |
| 715 | static char locbuf[32]; |
| 716 | |
| 717 | for (scp = siginfo_table; scp -> codename != NULL; scp++) |
| 718 | { |
| 719 | if ((scp -> signo == sip -> si_signo) && |
| 720 | (scp -> code == sip -> si_code)) |
| 721 | { |
| 722 | name = scp -> codename; |
| 723 | break; |
| 724 | } |
| 725 | } |
| 726 | if (name == NULL) |
| 727 | { |
| 728 | sprintf (locbuf, "sigcode %u", sip -> si_signo); |
| 729 | name = locbuf; |
| 730 | } |
| 731 | return (name); |
| 732 | } |
| 733 | |
| 734 | static char * |
| 735 | sigcodedesc (sip) |
| 736 | siginfo_t *sip; |
| 737 | { |
| 738 | struct sigcode *scp; |
| 739 | char *desc = NULL; |
| 740 | |
| 741 | for (scp = siginfo_table; scp -> codename != NULL; scp++) |
| 742 | { |
| 743 | if ((scp -> signo == sip -> si_signo) && |
| 744 | (scp -> code == sip -> si_code)) |
| 745 | { |
| 746 | desc = scp -> desc; |
| 747 | break; |
| 748 | } |
| 749 | } |
| 750 | if (desc == NULL) |
| 751 | { |
| 752 | desc = "Unrecognized signal or trap use"; |
| 753 | } |
| 754 | return (desc); |
| 755 | } |
| 756 | |
| 757 | /* |
| 758 | |
| 759 | LOCAL FUNCTION |
| 760 | |
| 761 | syscallname - translate a system call number into a system call name |
| 762 | |
| 763 | SYNOPSIS |
| 764 | |
| 765 | char *syscallname (int syscallnum) |
| 766 | |
| 767 | DESCRIPTION |
| 768 | |
| 769 | Given a system call number, translate it into the printable name |
| 770 | of a system call, or into "syscall <num>" if it is an unknown |
| 771 | number. |
| 772 | */ |
| 773 | |
| 774 | static char * |
| 775 | syscallname (syscallnum) |
| 776 | int syscallnum; |
| 777 | { |
| 778 | static char locbuf[32]; |
| 779 | char *rtnval; |
| 780 | |
| 781 | if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS) |
| 782 | { |
| 783 | rtnval = syscall_table[syscallnum]; |
| 784 | } |
| 785 | else |
| 786 | { |
| 787 | sprintf (locbuf, "syscall %u", syscallnum); |
| 788 | rtnval = locbuf; |
| 789 | } |
| 790 | return (rtnval); |
| 791 | } |
| 792 | |
| 793 | /* |
| 794 | |
| 795 | LOCAL FUNCTION |
| 796 | |
| 797 | init_syscall_table - initialize syscall translation table |
| 798 | |
| 799 | SYNOPSIS |
| 800 | |
| 801 | void init_syscall_table (void) |
| 802 | |
| 803 | DESCRIPTION |
| 804 | |
| 805 | Dynamically initialize the translation table to convert system |
| 806 | call numbers into printable system call names. Done once per |
| 807 | gdb run, on initialization. |
| 808 | |
| 809 | NOTES |
| 810 | |
| 811 | This is awfully ugly, but preprocessor tricks to make it prettier |
| 812 | tend to be nonportable. |
| 813 | */ |
| 814 | |
| 815 | static void |
| 816 | init_syscall_table () |
| 817 | { |
| 818 | #if defined (SYS_exit) |
| 819 | syscall_table[SYS_exit] = "exit"; |
| 820 | #endif |
| 821 | #if defined (SYS_fork) |
| 822 | syscall_table[SYS_fork] = "fork"; |
| 823 | #endif |
| 824 | #if defined (SYS_read) |
| 825 | syscall_table[SYS_read] = "read"; |
| 826 | #endif |
| 827 | #if defined (SYS_write) |
| 828 | syscall_table[SYS_write] = "write"; |
| 829 | #endif |
| 830 | #if defined (SYS_open) |
| 831 | syscall_table[SYS_open] = "open"; |
| 832 | #endif |
| 833 | #if defined (SYS_close) |
| 834 | syscall_table[SYS_close] = "close"; |
| 835 | #endif |
| 836 | #if defined (SYS_wait) |
| 837 | syscall_table[SYS_wait] = "wait"; |
| 838 | #endif |
| 839 | #if defined (SYS_creat) |
| 840 | syscall_table[SYS_creat] = "creat"; |
| 841 | #endif |
| 842 | #if defined (SYS_link) |
| 843 | syscall_table[SYS_link] = "link"; |
| 844 | #endif |
| 845 | #if defined (SYS_unlink) |
| 846 | syscall_table[SYS_unlink] = "unlink"; |
| 847 | #endif |
| 848 | #if defined (SYS_exec) |
| 849 | syscall_table[SYS_exec] = "exec"; |
| 850 | #endif |
| 851 | #if defined (SYS_execv) |
| 852 | syscall_table[SYS_execv] = "execv"; |
| 853 | #endif |
| 854 | #if defined (SYS_execve) |
| 855 | syscall_table[SYS_execve] = "execve"; |
| 856 | #endif |
| 857 | #if defined (SYS_chdir) |
| 858 | syscall_table[SYS_chdir] = "chdir"; |
| 859 | #endif |
| 860 | #if defined (SYS_time) |
| 861 | syscall_table[SYS_time] = "time"; |
| 862 | #endif |
| 863 | #if defined (SYS_mknod) |
| 864 | syscall_table[SYS_mknod] = "mknod"; |
| 865 | #endif |
| 866 | #if defined (SYS_chmod) |
| 867 | syscall_table[SYS_chmod] = "chmod"; |
| 868 | #endif |
| 869 | #if defined (SYS_chown) |
| 870 | syscall_table[SYS_chown] = "chown"; |
| 871 | #endif |
| 872 | #if defined (SYS_brk) |
| 873 | syscall_table[SYS_brk] = "brk"; |
| 874 | #endif |
| 875 | #if defined (SYS_stat) |
| 876 | syscall_table[SYS_stat] = "stat"; |
| 877 | #endif |
| 878 | #if defined (SYS_lseek) |
| 879 | syscall_table[SYS_lseek] = "lseek"; |
| 880 | #endif |
| 881 | #if defined (SYS_getpid) |
| 882 | syscall_table[SYS_getpid] = "getpid"; |
| 883 | #endif |
| 884 | #if defined (SYS_mount) |
| 885 | syscall_table[SYS_mount] = "mount"; |
| 886 | #endif |
| 887 | #if defined (SYS_umount) |
| 888 | syscall_table[SYS_umount] = "umount"; |
| 889 | #endif |
| 890 | #if defined (SYS_setuid) |
| 891 | syscall_table[SYS_setuid] = "setuid"; |
| 892 | #endif |
| 893 | #if defined (SYS_getuid) |
| 894 | syscall_table[SYS_getuid] = "getuid"; |
| 895 | #endif |
| 896 | #if defined (SYS_stime) |
| 897 | syscall_table[SYS_stime] = "stime"; |
| 898 | #endif |
| 899 | #if defined (SYS_ptrace) |
| 900 | syscall_table[SYS_ptrace] = "ptrace"; |
| 901 | #endif |
| 902 | #if defined (SYS_alarm) |
| 903 | syscall_table[SYS_alarm] = "alarm"; |
| 904 | #endif |
| 905 | #if defined (SYS_fstat) |
| 906 | syscall_table[SYS_fstat] = "fstat"; |
| 907 | #endif |
| 908 | #if defined (SYS_pause) |
| 909 | syscall_table[SYS_pause] = "pause"; |
| 910 | #endif |
| 911 | #if defined (SYS_utime) |
| 912 | syscall_table[SYS_utime] = "utime"; |
| 913 | #endif |
| 914 | #if defined (SYS_stty) |
| 915 | syscall_table[SYS_stty] = "stty"; |
| 916 | #endif |
| 917 | #if defined (SYS_gtty) |
| 918 | syscall_table[SYS_gtty] = "gtty"; |
| 919 | #endif |
| 920 | #if defined (SYS_access) |
| 921 | syscall_table[SYS_access] = "access"; |
| 922 | #endif |
| 923 | #if defined (SYS_nice) |
| 924 | syscall_table[SYS_nice] = "nice"; |
| 925 | #endif |
| 926 | #if defined (SYS_statfs) |
| 927 | syscall_table[SYS_statfs] = "statfs"; |
| 928 | #endif |
| 929 | #if defined (SYS_sync) |
| 930 | syscall_table[SYS_sync] = "sync"; |
| 931 | #endif |
| 932 | #if defined (SYS_kill) |
| 933 | syscall_table[SYS_kill] = "kill"; |
| 934 | #endif |
| 935 | #if defined (SYS_fstatfs) |
| 936 | syscall_table[SYS_fstatfs] = "fstatfs"; |
| 937 | #endif |
| 938 | #if defined (SYS_pgrpsys) |
| 939 | syscall_table[SYS_pgrpsys] = "pgrpsys"; |
| 940 | #endif |
| 941 | #if defined (SYS_xenix) |
| 942 | syscall_table[SYS_xenix] = "xenix"; |
| 943 | #endif |
| 944 | #if defined (SYS_dup) |
| 945 | syscall_table[SYS_dup] = "dup"; |
| 946 | #endif |
| 947 | #if defined (SYS_pipe) |
| 948 | syscall_table[SYS_pipe] = "pipe"; |
| 949 | #endif |
| 950 | #if defined (SYS_times) |
| 951 | syscall_table[SYS_times] = "times"; |
| 952 | #endif |
| 953 | #if defined (SYS_profil) |
| 954 | syscall_table[SYS_profil] = "profil"; |
| 955 | #endif |
| 956 | #if defined (SYS_plock) |
| 957 | syscall_table[SYS_plock] = "plock"; |
| 958 | #endif |
| 959 | #if defined (SYS_setgid) |
| 960 | syscall_table[SYS_setgid] = "setgid"; |
| 961 | #endif |
| 962 | #if defined (SYS_getgid) |
| 963 | syscall_table[SYS_getgid] = "getgid"; |
| 964 | #endif |
| 965 | #if defined (SYS_signal) |
| 966 | syscall_table[SYS_signal] = "signal"; |
| 967 | #endif |
| 968 | #if defined (SYS_msgsys) |
| 969 | syscall_table[SYS_msgsys] = "msgsys"; |
| 970 | #endif |
| 971 | #if defined (SYS_sys3b) |
| 972 | syscall_table[SYS_sys3b] = "sys3b"; |
| 973 | #endif |
| 974 | #if defined (SYS_acct) |
| 975 | syscall_table[SYS_acct] = "acct"; |
| 976 | #endif |
| 977 | #if defined (SYS_shmsys) |
| 978 | syscall_table[SYS_shmsys] = "shmsys"; |
| 979 | #endif |
| 980 | #if defined (SYS_semsys) |
| 981 | syscall_table[SYS_semsys] = "semsys"; |
| 982 | #endif |
| 983 | #if defined (SYS_ioctl) |
| 984 | syscall_table[SYS_ioctl] = "ioctl"; |
| 985 | #endif |
| 986 | #if defined (SYS_uadmin) |
| 987 | syscall_table[SYS_uadmin] = "uadmin"; |
| 988 | #endif |
| 989 | #if defined (SYS_utssys) |
| 990 | syscall_table[SYS_utssys] = "utssys"; |
| 991 | #endif |
| 992 | #if defined (SYS_fsync) |
| 993 | syscall_table[SYS_fsync] = "fsync"; |
| 994 | #endif |
| 995 | #if defined (SYS_umask) |
| 996 | syscall_table[SYS_umask] = "umask"; |
| 997 | #endif |
| 998 | #if defined (SYS_chroot) |
| 999 | syscall_table[SYS_chroot] = "chroot"; |
| 1000 | #endif |
| 1001 | #if defined (SYS_fcntl) |
| 1002 | syscall_table[SYS_fcntl] = "fcntl"; |
| 1003 | #endif |
| 1004 | #if defined (SYS_ulimit) |
| 1005 | syscall_table[SYS_ulimit] = "ulimit"; |
| 1006 | #endif |
| 1007 | #if defined (SYS_rfsys) |
| 1008 | syscall_table[SYS_rfsys] = "rfsys"; |
| 1009 | #endif |
| 1010 | #if defined (SYS_rmdir) |
| 1011 | syscall_table[SYS_rmdir] = "rmdir"; |
| 1012 | #endif |
| 1013 | #if defined (SYS_mkdir) |
| 1014 | syscall_table[SYS_mkdir] = "mkdir"; |
| 1015 | #endif |
| 1016 | #if defined (SYS_getdents) |
| 1017 | syscall_table[SYS_getdents] = "getdents"; |
| 1018 | #endif |
| 1019 | #if defined (SYS_sysfs) |
| 1020 | syscall_table[SYS_sysfs] = "sysfs"; |
| 1021 | #endif |
| 1022 | #if defined (SYS_getmsg) |
| 1023 | syscall_table[SYS_getmsg] = "getmsg"; |
| 1024 | #endif |
| 1025 | #if defined (SYS_putmsg) |
| 1026 | syscall_table[SYS_putmsg] = "putmsg"; |
| 1027 | #endif |
| 1028 | #if defined (SYS_poll) |
| 1029 | syscall_table[SYS_poll] = "poll"; |
| 1030 | #endif |
| 1031 | #if defined (SYS_lstat) |
| 1032 | syscall_table[SYS_lstat] = "lstat"; |
| 1033 | #endif |
| 1034 | #if defined (SYS_symlink) |
| 1035 | syscall_table[SYS_symlink] = "symlink"; |
| 1036 | #endif |
| 1037 | #if defined (SYS_readlink) |
| 1038 | syscall_table[SYS_readlink] = "readlink"; |
| 1039 | #endif |
| 1040 | #if defined (SYS_setgroups) |
| 1041 | syscall_table[SYS_setgroups] = "setgroups"; |
| 1042 | #endif |
| 1043 | #if defined (SYS_getgroups) |
| 1044 | syscall_table[SYS_getgroups] = "getgroups"; |
| 1045 | #endif |
| 1046 | #if defined (SYS_fchmod) |
| 1047 | syscall_table[SYS_fchmod] = "fchmod"; |
| 1048 | #endif |
| 1049 | #if defined (SYS_fchown) |
| 1050 | syscall_table[SYS_fchown] = "fchown"; |
| 1051 | #endif |
| 1052 | #if defined (SYS_sigprocmask) |
| 1053 | syscall_table[SYS_sigprocmask] = "sigprocmask"; |
| 1054 | #endif |
| 1055 | #if defined (SYS_sigsuspend) |
| 1056 | syscall_table[SYS_sigsuspend] = "sigsuspend"; |
| 1057 | #endif |
| 1058 | #if defined (SYS_sigaltstack) |
| 1059 | syscall_table[SYS_sigaltstack] = "sigaltstack"; |
| 1060 | #endif |
| 1061 | #if defined (SYS_sigaction) |
| 1062 | syscall_table[SYS_sigaction] = "sigaction"; |
| 1063 | #endif |
| 1064 | #if defined (SYS_sigpending) |
| 1065 | syscall_table[SYS_sigpending] = "sigpending"; |
| 1066 | #endif |
| 1067 | #if defined (SYS_context) |
| 1068 | syscall_table[SYS_context] = "context"; |
| 1069 | #endif |
| 1070 | #if defined (SYS_evsys) |
| 1071 | syscall_table[SYS_evsys] = "evsys"; |
| 1072 | #endif |
| 1073 | #if defined (SYS_evtrapret) |
| 1074 | syscall_table[SYS_evtrapret] = "evtrapret"; |
| 1075 | #endif |
| 1076 | #if defined (SYS_statvfs) |
| 1077 | syscall_table[SYS_statvfs] = "statvfs"; |
| 1078 | #endif |
| 1079 | #if defined (SYS_fstatvfs) |
| 1080 | syscall_table[SYS_fstatvfs] = "fstatvfs"; |
| 1081 | #endif |
| 1082 | #if defined (SYS_nfssys) |
| 1083 | syscall_table[SYS_nfssys] = "nfssys"; |
| 1084 | #endif |
| 1085 | #if defined (SYS_waitsys) |
| 1086 | syscall_table[SYS_waitsys] = "waitsys"; |
| 1087 | #endif |
| 1088 | #if defined (SYS_sigsendsys) |
| 1089 | syscall_table[SYS_sigsendsys] = "sigsendsys"; |
| 1090 | #endif |
| 1091 | #if defined (SYS_hrtsys) |
| 1092 | syscall_table[SYS_hrtsys] = "hrtsys"; |
| 1093 | #endif |
| 1094 | #if defined (SYS_acancel) |
| 1095 | syscall_table[SYS_acancel] = "acancel"; |
| 1096 | #endif |
| 1097 | #if defined (SYS_async) |
| 1098 | syscall_table[SYS_async] = "async"; |
| 1099 | #endif |
| 1100 | #if defined (SYS_priocntlsys) |
| 1101 | syscall_table[SYS_priocntlsys] = "priocntlsys"; |
| 1102 | #endif |
| 1103 | #if defined (SYS_pathconf) |
| 1104 | syscall_table[SYS_pathconf] = "pathconf"; |
| 1105 | #endif |
| 1106 | #if defined (SYS_mincore) |
| 1107 | syscall_table[SYS_mincore] = "mincore"; |
| 1108 | #endif |
| 1109 | #if defined (SYS_mmap) |
| 1110 | syscall_table[SYS_mmap] = "mmap"; |
| 1111 | #endif |
| 1112 | #if defined (SYS_mprotect) |
| 1113 | syscall_table[SYS_mprotect] = "mprotect"; |
| 1114 | #endif |
| 1115 | #if defined (SYS_munmap) |
| 1116 | syscall_table[SYS_munmap] = "munmap"; |
| 1117 | #endif |
| 1118 | #if defined (SYS_fpathconf) |
| 1119 | syscall_table[SYS_fpathconf] = "fpathconf"; |
| 1120 | #endif |
| 1121 | #if defined (SYS_vfork) |
| 1122 | syscall_table[SYS_vfork] = "vfork"; |
| 1123 | #endif |
| 1124 | #if defined (SYS_fchdir) |
| 1125 | syscall_table[SYS_fchdir] = "fchdir"; |
| 1126 | #endif |
| 1127 | #if defined (SYS_readv) |
| 1128 | syscall_table[SYS_readv] = "readv"; |
| 1129 | #endif |
| 1130 | #if defined (SYS_writev) |
| 1131 | syscall_table[SYS_writev] = "writev"; |
| 1132 | #endif |
| 1133 | #if defined (SYS_xstat) |
| 1134 | syscall_table[SYS_xstat] = "xstat"; |
| 1135 | #endif |
| 1136 | #if defined (SYS_lxstat) |
| 1137 | syscall_table[SYS_lxstat] = "lxstat"; |
| 1138 | #endif |
| 1139 | #if defined (SYS_fxstat) |
| 1140 | syscall_table[SYS_fxstat] = "fxstat"; |
| 1141 | #endif |
| 1142 | #if defined (SYS_xmknod) |
| 1143 | syscall_table[SYS_xmknod] = "xmknod"; |
| 1144 | #endif |
| 1145 | #if defined (SYS_clocal) |
| 1146 | syscall_table[SYS_clocal] = "clocal"; |
| 1147 | #endif |
| 1148 | #if defined (SYS_setrlimit) |
| 1149 | syscall_table[SYS_setrlimit] = "setrlimit"; |
| 1150 | #endif |
| 1151 | #if defined (SYS_getrlimit) |
| 1152 | syscall_table[SYS_getrlimit] = "getrlimit"; |
| 1153 | #endif |
| 1154 | #if defined (SYS_lchown) |
| 1155 | syscall_table[SYS_lchown] = "lchown"; |
| 1156 | #endif |
| 1157 | #if defined (SYS_memcntl) |
| 1158 | syscall_table[SYS_memcntl] = "memcntl"; |
| 1159 | #endif |
| 1160 | #if defined (SYS_getpmsg) |
| 1161 | syscall_table[SYS_getpmsg] = "getpmsg"; |
| 1162 | #endif |
| 1163 | #if defined (SYS_putpmsg) |
| 1164 | syscall_table[SYS_putpmsg] = "putpmsg"; |
| 1165 | #endif |
| 1166 | #if defined (SYS_rename) |
| 1167 | syscall_table[SYS_rename] = "rename"; |
| 1168 | #endif |
| 1169 | #if defined (SYS_uname) |
| 1170 | syscall_table[SYS_uname] = "uname"; |
| 1171 | #endif |
| 1172 | #if defined (SYS_setegid) |
| 1173 | syscall_table[SYS_setegid] = "setegid"; |
| 1174 | #endif |
| 1175 | #if defined (SYS_sysconfig) |
| 1176 | syscall_table[SYS_sysconfig] = "sysconfig"; |
| 1177 | #endif |
| 1178 | #if defined (SYS_adjtime) |
| 1179 | syscall_table[SYS_adjtime] = "adjtime"; |
| 1180 | #endif |
| 1181 | #if defined (SYS_systeminfo) |
| 1182 | syscall_table[SYS_systeminfo] = "systeminfo"; |
| 1183 | #endif |
| 1184 | #if defined (SYS_seteuid) |
| 1185 | syscall_table[SYS_seteuid] = "seteuid"; |
| 1186 | #endif |
| 1187 | #if defined (SYS_sproc) |
| 1188 | syscall_table[SYS_sproc] = "sproc"; |
| 1189 | #endif |
| 1190 | } |
| 1191 | |
| 1192 | /* |
| 1193 | |
| 1194 | LOCAL FUNCTION |
| 1195 | |
| 1196 | procfs_kill_inferior - kill any currently inferior |
| 1197 | |
| 1198 | SYNOPSIS |
| 1199 | |
| 1200 | void procfs_kill_inferior (void) |
| 1201 | |
| 1202 | DESCRIPTION |
| 1203 | |
| 1204 | Kill any current inferior. |
| 1205 | |
| 1206 | NOTES |
| 1207 | |
| 1208 | Kills even attached inferiors. Presumably the user has already |
| 1209 | been prompted that the inferior is an attached one rather than |
| 1210 | one started by gdb. (FIXME?) |
| 1211 | |
| 1212 | */ |
| 1213 | |
| 1214 | static void |
| 1215 | procfs_kill_inferior () |
| 1216 | { |
| 1217 | target_mourn_inferior (); |
| 1218 | } |
| 1219 | |
| 1220 | /* |
| 1221 | |
| 1222 | LOCAL FUNCTION |
| 1223 | |
| 1224 | unconditionally_kill_inferior - terminate the inferior |
| 1225 | |
| 1226 | SYNOPSIS |
| 1227 | |
| 1228 | static void unconditionally_kill_inferior (struct procinfo *) |
| 1229 | |
| 1230 | DESCRIPTION |
| 1231 | |
| 1232 | Kill the specified inferior. |
| 1233 | |
| 1234 | NOTE |
| 1235 | |
| 1236 | A possibly useful enhancement would be to first try sending |
| 1237 | the inferior a terminate signal, politely asking it to commit |
| 1238 | suicide, before we murder it (we could call that |
| 1239 | politely_kill_inferior()). |
| 1240 | |
| 1241 | */ |
| 1242 | |
| 1243 | static void |
| 1244 | unconditionally_kill_inferior (pi) |
| 1245 | struct procinfo *pi; |
| 1246 | { |
| 1247 | int signo; |
| 1248 | int ppid; |
| 1249 | |
| 1250 | ppid = pi->prstatus.pr_ppid; |
| 1251 | |
| 1252 | signo = SIGKILL; |
| 1253 | |
| 1254 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL |
| 1255 | /* Alpha OSF/1 procfs needs a PIOCSSIG call with a SIGKILL signal |
| 1256 | to kill the inferior, otherwise it might remain stopped with a |
| 1257 | pending SIGKILL. |
| 1258 | We do not check the result of the PIOCSSIG, the inferior might have |
| 1259 | died already. */ |
| 1260 | { |
| 1261 | struct siginfo newsiginfo; |
| 1262 | |
| 1263 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
| 1264 | newsiginfo.si_signo = signo; |
| 1265 | newsiginfo.si_code = 0; |
| 1266 | newsiginfo.si_errno = 0; |
| 1267 | newsiginfo.si_pid = getpid (); |
| 1268 | newsiginfo.si_uid = getuid (); |
| 1269 | ioctl (pi->fd, PIOCSSIG, &newsiginfo); |
| 1270 | } |
| 1271 | #else |
| 1272 | ioctl (pi->fd, PIOCKILL, &signo); |
| 1273 | #endif |
| 1274 | |
| 1275 | close_proc_file (pi); |
| 1276 | |
| 1277 | /* Only wait() for our direct children. Our grandchildren zombies are killed |
| 1278 | by the death of their parents. */ |
| 1279 | |
| 1280 | if (ppid == getpid()) |
| 1281 | wait ((int *) 0); |
| 1282 | } |
| 1283 | |
| 1284 | /* |
| 1285 | |
| 1286 | LOCAL FUNCTION |
| 1287 | |
| 1288 | procfs_xfer_memory -- copy data to or from inferior memory space |
| 1289 | |
| 1290 | SYNOPSIS |
| 1291 | |
| 1292 | int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, |
| 1293 | int dowrite, struct target_ops target) |
| 1294 | |
| 1295 | DESCRIPTION |
| 1296 | |
| 1297 | Copy LEN bytes to/from inferior's memory starting at MEMADDR |
| 1298 | from/to debugger memory starting at MYADDR. Copy from inferior |
| 1299 | if DOWRITE is zero or to inferior if DOWRITE is nonzero. |
| 1300 | |
| 1301 | Returns the length copied, which is either the LEN argument or |
| 1302 | zero. This xfer function does not do partial moves, since procfs_ops |
| 1303 | doesn't allow memory operations to cross below us in the target stack |
| 1304 | anyway. |
| 1305 | |
| 1306 | NOTES |
| 1307 | |
| 1308 | The /proc interface makes this an almost trivial task. |
| 1309 | */ |
| 1310 | |
| 1311 | static int |
| 1312 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) |
| 1313 | CORE_ADDR memaddr; |
| 1314 | char *myaddr; |
| 1315 | int len; |
| 1316 | int dowrite; |
| 1317 | struct target_ops *target; /* ignored */ |
| 1318 | { |
| 1319 | int nbytes = 0; |
| 1320 | struct procinfo *pi; |
| 1321 | |
| 1322 | pi = current_procinfo; |
| 1323 | |
| 1324 | if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr) |
| 1325 | { |
| 1326 | if (dowrite) |
| 1327 | { |
| 1328 | nbytes = write (pi->fd, myaddr, len); |
| 1329 | } |
| 1330 | else |
| 1331 | { |
| 1332 | nbytes = read (pi->fd, myaddr, len); |
| 1333 | } |
| 1334 | if (nbytes < 0) |
| 1335 | { |
| 1336 | nbytes = 0; |
| 1337 | } |
| 1338 | } |
| 1339 | return (nbytes); |
| 1340 | } |
| 1341 | |
| 1342 | /* |
| 1343 | |
| 1344 | LOCAL FUNCTION |
| 1345 | |
| 1346 | procfs_store_registers -- copy register values back to inferior |
| 1347 | |
| 1348 | SYNOPSIS |
| 1349 | |
| 1350 | void procfs_store_registers (int regno) |
| 1351 | |
| 1352 | DESCRIPTION |
| 1353 | |
| 1354 | Store our current register values back into the inferior. If |
| 1355 | REGNO is -1 then store all the register, otherwise store just |
| 1356 | the value specified by REGNO. |
| 1357 | |
| 1358 | NOTES |
| 1359 | |
| 1360 | If we are storing only a single register, we first have to get all |
| 1361 | the current values from the process, overwrite the desired register |
| 1362 | in the gregset with the one we want from gdb's registers, and then |
| 1363 | send the whole set back to the process. For writing all the |
| 1364 | registers, all we have to do is generate the gregset and send it to |
| 1365 | the process. |
| 1366 | |
| 1367 | Also note that the process has to be stopped on an event of interest |
| 1368 | for this to work, which basically means that it has to have been |
| 1369 | run under the control of one of the other /proc ioctl calls and not |
| 1370 | ptrace. Since we don't use ptrace anyway, we don't worry about this |
| 1371 | fine point, but it is worth noting for future reference. |
| 1372 | |
| 1373 | Gdb is confused about what this function is supposed to return. |
| 1374 | Some versions return a value, others return nothing. Some are |
| 1375 | declared to return a value and actually return nothing. Gdb ignores |
| 1376 | anything returned. (FIXME) |
| 1377 | |
| 1378 | */ |
| 1379 | |
| 1380 | static void |
| 1381 | procfs_store_registers (regno) |
| 1382 | int regno; |
| 1383 | { |
| 1384 | struct procinfo *pi; |
| 1385 | |
| 1386 | pi = current_procinfo; |
| 1387 | |
| 1388 | if (regno != -1) |
| 1389 | { |
| 1390 | ioctl (pi->fd, PIOCGREG, &pi->gregset); |
| 1391 | } |
| 1392 | fill_gregset (&pi->gregset, regno); |
| 1393 | ioctl (pi->fd, PIOCSREG, &pi->gregset); |
| 1394 | |
| 1395 | #if defined (FP0_REGNUM) |
| 1396 | |
| 1397 | /* Now repeat everything using the floating point register set, if the |
| 1398 | target has floating point hardware. Since we ignore the returned value, |
| 1399 | we'll never know whether it worked or not anyway. */ |
| 1400 | |
| 1401 | if (regno != -1) |
| 1402 | { |
| 1403 | ioctl (pi->fd, PIOCGFPREG, &pi->fpregset); |
| 1404 | } |
| 1405 | fill_fpregset (&pi->fpregset, regno); |
| 1406 | ioctl (pi->fd, PIOCSFPREG, &pi->fpregset); |
| 1407 | |
| 1408 | #endif /* FP0_REGNUM */ |
| 1409 | |
| 1410 | } |
| 1411 | |
| 1412 | /* |
| 1413 | |
| 1414 | LOCAL FUNCTION |
| 1415 | |
| 1416 | create_procinfo - initialize access to a /proc entry |
| 1417 | |
| 1418 | SYNOPSIS |
| 1419 | |
| 1420 | struct procinfo * create_procinfo (int pid) |
| 1421 | |
| 1422 | DESCRIPTION |
| 1423 | |
| 1424 | Allocate a procinfo structure, open the /proc file and then set up the |
| 1425 | set of signals and faults that are to be traced. Returns a pointer to |
| 1426 | the new procinfo structure. |
| 1427 | |
| 1428 | NOTES |
| 1429 | |
| 1430 | If proc_init_failed ever gets called, control returns to the command |
| 1431 | processing loop via the standard error handling code. |
| 1432 | |
| 1433 | */ |
| 1434 | |
| 1435 | static struct procinfo * |
| 1436 | create_procinfo (pid) |
| 1437 | int pid; |
| 1438 | { |
| 1439 | struct procinfo *pi; |
| 1440 | |
| 1441 | pi = find_procinfo (pid, 1); |
| 1442 | if (pi != NULL) |
| 1443 | return pi; /* All done! It already exists */ |
| 1444 | |
| 1445 | pi = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
| 1446 | |
| 1447 | if (!open_proc_file (pid, pi, O_RDWR)) |
| 1448 | proc_init_failed (pi, "can't open process file"); |
| 1449 | |
| 1450 | /* Add new process to process info list */ |
| 1451 | |
| 1452 | pi->next = procinfo_list; |
| 1453 | procinfo_list = pi; |
| 1454 | |
| 1455 | add_fd (pi); /* Add to list for poll/select */ |
| 1456 | |
| 1457 | memset ((char *) &pi->prrun, 0, sizeof (pi->prrun)); |
| 1458 | prfillset (&pi->prrun.pr_trace); |
| 1459 | procfs_notice_signals (pid); |
| 1460 | prfillset (&pi->prrun.pr_fault); |
| 1461 | prdelset (&pi->prrun.pr_fault, FLTPAGE); |
| 1462 | |
| 1463 | #ifdef PROCFS_DONT_TRACE_FAULTS |
| 1464 | premptyset (&pi->prrun.pr_fault); |
| 1465 | #endif |
| 1466 | |
| 1467 | if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) |
| 1468 | proc_init_failed (pi, "PIOCWSTOP failed"); |
| 1469 | |
| 1470 | if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0) |
| 1471 | proc_init_failed (pi, "PIOCSFAULT failed"); |
| 1472 | |
| 1473 | return pi; |
| 1474 | } |
| 1475 | |
| 1476 | /* |
| 1477 | |
| 1478 | LOCAL FUNCTION |
| 1479 | |
| 1480 | procfs_init_inferior - initialize target vector and access to a |
| 1481 | /proc entry |
| 1482 | |
| 1483 | SYNOPSIS |
| 1484 | |
| 1485 | void procfs_init_inferior (int pid) |
| 1486 | |
| 1487 | DESCRIPTION |
| 1488 | |
| 1489 | When gdb starts an inferior, this function is called in the parent |
| 1490 | process immediately after the fork. It waits for the child to stop |
| 1491 | on the return from the exec system call (the child itself takes care |
| 1492 | of ensuring that this is set up), then sets up the set of signals |
| 1493 | and faults that are to be traced. |
| 1494 | |
| 1495 | NOTES |
| 1496 | |
| 1497 | If proc_init_failed ever gets called, control returns to the command |
| 1498 | processing loop via the standard error handling code. |
| 1499 | |
| 1500 | */ |
| 1501 | |
| 1502 | static void |
| 1503 | procfs_init_inferior (pid) |
| 1504 | int pid; |
| 1505 | { |
| 1506 | push_target (&procfs_ops); |
| 1507 | |
| 1508 | create_procinfo (pid); |
| 1509 | add_thread (pid); /* Setup initial thread */ |
| 1510 | |
| 1511 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
| 1512 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
| 1513 | #else |
| 1514 | /* One trap to exec the shell, one to exec the program being debugged. */ |
| 1515 | startup_inferior (2); |
| 1516 | #endif |
| 1517 | } |
| 1518 | |
| 1519 | /* |
| 1520 | |
| 1521 | GLOBAL FUNCTION |
| 1522 | |
| 1523 | procfs_notice_signals |
| 1524 | |
| 1525 | SYNOPSIS |
| 1526 | |
| 1527 | static void procfs_notice_signals (int pid); |
| 1528 | |
| 1529 | DESCRIPTION |
| 1530 | |
| 1531 | When the user changes the state of gdb's signal handling via the |
| 1532 | "handle" command, this function gets called to see if any change |
| 1533 | in the /proc interface is required. It is also called internally |
| 1534 | by other /proc interface functions to initialize the state of |
| 1535 | the traced signal set. |
| 1536 | |
| 1537 | One thing it does is that signals for which the state is "nostop", |
| 1538 | "noprint", and "pass", have their trace bits reset in the pr_trace |
| 1539 | field, so that they are no longer traced. This allows them to be |
| 1540 | delivered directly to the inferior without the debugger ever being |
| 1541 | involved. |
| 1542 | */ |
| 1543 | |
| 1544 | static void |
| 1545 | procfs_notice_signals (pid) |
| 1546 | int pid; |
| 1547 | { |
| 1548 | int signo; |
| 1549 | struct procinfo *pi; |
| 1550 | |
| 1551 | pi = find_procinfo (pid, 0); |
| 1552 | |
| 1553 | for (signo = 0; signo < NSIG; signo++) |
| 1554 | { |
| 1555 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && |
| 1556 | signal_print_state (target_signal_from_host (signo)) == 0 && |
| 1557 | signal_pass_state (target_signal_from_host (signo)) == 1) |
| 1558 | { |
| 1559 | prdelset (&pi->prrun.pr_trace, signo); |
| 1560 | } |
| 1561 | else |
| 1562 | { |
| 1563 | praddset (&pi->prrun.pr_trace, signo); |
| 1564 | } |
| 1565 | } |
| 1566 | if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace)) |
| 1567 | { |
| 1568 | print_sys_errmsg ("PIOCSTRACE failed", errno); |
| 1569 | } |
| 1570 | } |
| 1571 | |
| 1572 | /* |
| 1573 | |
| 1574 | LOCAL FUNCTION |
| 1575 | |
| 1576 | proc_set_exec_trap -- arrange for exec'd child to halt at startup |
| 1577 | |
| 1578 | SYNOPSIS |
| 1579 | |
| 1580 | void proc_set_exec_trap (void) |
| 1581 | |
| 1582 | DESCRIPTION |
| 1583 | |
| 1584 | This function is called in the child process when starting up |
| 1585 | an inferior, prior to doing the exec of the actual inferior. |
| 1586 | It sets the child process's exitset to make exit from the exec |
| 1587 | system call an event of interest to stop on, and then simply |
| 1588 | returns. The child does the exec, the system call returns, and |
| 1589 | the child stops at the first instruction, ready for the gdb |
| 1590 | parent process to take control of it. |
| 1591 | |
| 1592 | NOTE |
| 1593 | |
| 1594 | We need to use all local variables since the child may be sharing |
| 1595 | it's data space with the parent, if vfork was used rather than |
| 1596 | fork. |
| 1597 | |
| 1598 | Also note that we want to turn off the inherit-on-fork flag in |
| 1599 | the child process so that any grand-children start with all |
| 1600 | tracing flags cleared. |
| 1601 | */ |
| 1602 | |
| 1603 | static void |
| 1604 | proc_set_exec_trap () |
| 1605 | { |
| 1606 | sysset_t exitset; |
| 1607 | sysset_t entryset; |
| 1608 | auto char procname[32]; |
| 1609 | int fd; |
| 1610 | |
| 1611 | sprintf (procname, PROC_NAME_FMT, getpid ()); |
| 1612 | if ((fd = open (procname, O_RDWR)) < 0) |
| 1613 | { |
| 1614 | perror (procname); |
| 1615 | gdb_flush (gdb_stderr); |
| 1616 | _exit (127); |
| 1617 | } |
| 1618 | premptyset (&exitset); |
| 1619 | premptyset (&entryset); |
| 1620 | |
| 1621 | #ifdef PIOCSSPCACT |
| 1622 | /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace |
| 1623 | exits from exec system calls because of the user level loader. */ |
| 1624 | { |
| 1625 | int prfs_flags; |
| 1626 | |
| 1627 | if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0) |
| 1628 | { |
| 1629 | perror (procname); |
| 1630 | gdb_flush (gdb_stderr); |
| 1631 | _exit (127); |
| 1632 | } |
| 1633 | prfs_flags |= PRFS_STOPEXEC; |
| 1634 | if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0) |
| 1635 | { |
| 1636 | perror (procname); |
| 1637 | gdb_flush (gdb_stderr); |
| 1638 | _exit (127); |
| 1639 | } |
| 1640 | } |
| 1641 | #else |
| 1642 | /* GW: Rationale... |
| 1643 | Not all systems with /proc have all the exec* syscalls with the same |
| 1644 | names. On the SGI, for example, there is no SYS_exec, but there |
| 1645 | *is* a SYS_execv. So, we try to account for that. */ |
| 1646 | |
| 1647 | #ifdef SYS_exec |
| 1648 | praddset (&exitset, SYS_exec); |
| 1649 | #endif |
| 1650 | #ifdef SYS_execve |
| 1651 | praddset (&exitset, SYS_execve); |
| 1652 | #endif |
| 1653 | #ifdef SYS_execv |
| 1654 | praddset (&exitset, SYS_execv); |
| 1655 | #endif |
| 1656 | |
| 1657 | if (ioctl (fd, PIOCSEXIT, &exitset) < 0) |
| 1658 | { |
| 1659 | perror (procname); |
| 1660 | gdb_flush (gdb_stderr); |
| 1661 | _exit (127); |
| 1662 | } |
| 1663 | #endif |
| 1664 | |
| 1665 | praddset (&entryset, SYS_exit); |
| 1666 | |
| 1667 | if (ioctl (fd, PIOCSENTRY, &entryset) < 0) |
| 1668 | { |
| 1669 | perror (procname); |
| 1670 | gdb_flush (gdb_stderr); |
| 1671 | _exit (126); |
| 1672 | } |
| 1673 | |
| 1674 | /* Turn off inherit-on-fork flag so that all grand-children of gdb |
| 1675 | start with tracing flags cleared. */ |
| 1676 | |
| 1677 | #if defined (PIOCRESET) /* New method */ |
| 1678 | { |
| 1679 | long pr_flags; |
| 1680 | pr_flags = PR_FORK; |
| 1681 | ioctl (fd, PIOCRESET, &pr_flags); |
| 1682 | } |
| 1683 | #else |
| 1684 | #if defined (PIOCRFORK) /* Original method */ |
| 1685 | ioctl (fd, PIOCRFORK, NULL); |
| 1686 | #endif |
| 1687 | #endif |
| 1688 | |
| 1689 | /* Turn on run-on-last-close flag so that this process will not hang |
| 1690 | if GDB goes away for some reason. */ |
| 1691 | |
| 1692 | #if defined (PIOCSET) /* New method */ |
| 1693 | { |
| 1694 | long pr_flags; |
| 1695 | pr_flags = PR_RLC; |
| 1696 | (void) ioctl (fd, PIOCSET, &pr_flags); |
| 1697 | } |
| 1698 | #else |
| 1699 | #if defined (PIOCSRLC) /* Original method */ |
| 1700 | (void) ioctl (fd, PIOCSRLC, 0); |
| 1701 | #endif |
| 1702 | #endif |
| 1703 | } |
| 1704 | |
| 1705 | /* |
| 1706 | |
| 1707 | GLOBAL FUNCTION |
| 1708 | |
| 1709 | proc_iterate_over_mappings -- call function for every mapped space |
| 1710 | |
| 1711 | SYNOPSIS |
| 1712 | |
| 1713 | int proc_iterate_over_mappings (int (*func)()) |
| 1714 | |
| 1715 | DESCRIPTION |
| 1716 | |
| 1717 | Given a pointer to a function, call that function for every |
| 1718 | mapped address space, passing it an open file descriptor for |
| 1719 | the file corresponding to that mapped address space (if any) |
| 1720 | and the base address of the mapped space. Quit when we hit |
| 1721 | the end of the mappings or the function returns nonzero. |
| 1722 | */ |
| 1723 | |
| 1724 | int |
| 1725 | proc_iterate_over_mappings (func) |
| 1726 | int (*func) PARAMS ((int, CORE_ADDR)); |
| 1727 | { |
| 1728 | int nmap; |
| 1729 | int fd; |
| 1730 | int funcstat = 0; |
| 1731 | struct prmap *prmaps; |
| 1732 | struct prmap *prmap; |
| 1733 | struct procinfo *pi; |
| 1734 | |
| 1735 | pi = current_procinfo; |
| 1736 | |
| 1737 | if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0) |
| 1738 | { |
| 1739 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 1740 | if (ioctl (pi->fd, PIOCMAP, prmaps) == 0) |
| 1741 | { |
| 1742 | for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap) |
| 1743 | { |
| 1744 | fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0); |
| 1745 | funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr); |
| 1746 | close (fd); |
| 1747 | } |
| 1748 | } |
| 1749 | } |
| 1750 | return (funcstat); |
| 1751 | } |
| 1752 | |
| 1753 | #if 0 /* Currently unused */ |
| 1754 | /* |
| 1755 | |
| 1756 | GLOBAL FUNCTION |
| 1757 | |
| 1758 | proc_base_address -- find base address for segment containing address |
| 1759 | |
| 1760 | SYNOPSIS |
| 1761 | |
| 1762 | CORE_ADDR proc_base_address (CORE_ADDR addr) |
| 1763 | |
| 1764 | DESCRIPTION |
| 1765 | |
| 1766 | Given an address of a location in the inferior, find and return |
| 1767 | the base address of the mapped segment containing that address. |
| 1768 | |
| 1769 | This is used for example, by the shared library support code, |
| 1770 | where we have the pc value for some location in the shared library |
| 1771 | where we are stopped, and need to know the base address of the |
| 1772 | segment containing that address. |
| 1773 | */ |
| 1774 | |
| 1775 | CORE_ADDR |
| 1776 | proc_base_address (addr) |
| 1777 | CORE_ADDR addr; |
| 1778 | { |
| 1779 | int nmap; |
| 1780 | struct prmap *prmaps; |
| 1781 | struct prmap *prmap; |
| 1782 | CORE_ADDR baseaddr = 0; |
| 1783 | struct procinfo *pi; |
| 1784 | |
| 1785 | pi = current_procinfo; |
| 1786 | |
| 1787 | if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0) |
| 1788 | { |
| 1789 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 1790 | if (ioctl (pi->fd, PIOCMAP, prmaps) == 0) |
| 1791 | { |
| 1792 | for (prmap = prmaps; prmap -> pr_size; ++prmap) |
| 1793 | { |
| 1794 | if ((prmap -> pr_vaddr <= (caddr_t) addr) && |
| 1795 | (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr)) |
| 1796 | { |
| 1797 | baseaddr = (CORE_ADDR) prmap -> pr_vaddr; |
| 1798 | break; |
| 1799 | } |
| 1800 | } |
| 1801 | } |
| 1802 | } |
| 1803 | return (baseaddr); |
| 1804 | } |
| 1805 | |
| 1806 | #endif /* 0 */ |
| 1807 | |
| 1808 | /* |
| 1809 | |
| 1810 | LOCAL FUNCTION |
| 1811 | |
| 1812 | proc_address_to_fd -- return open fd for file mapped to address |
| 1813 | |
| 1814 | SYNOPSIS |
| 1815 | |
| 1816 | int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain) |
| 1817 | |
| 1818 | DESCRIPTION |
| 1819 | |
| 1820 | Given an address in the current inferior's address space, use the |
| 1821 | /proc interface to find an open file descriptor for the file that |
| 1822 | this address was mapped in from. Return -1 if there is no current |
| 1823 | inferior. Print a warning message if there is an inferior but |
| 1824 | the address corresponds to no file (IE a bogus address). |
| 1825 | |
| 1826 | */ |
| 1827 | |
| 1828 | static int |
| 1829 | proc_address_to_fd (pi, addr, complain) |
| 1830 | struct procinfo *pi; |
| 1831 | CORE_ADDR addr; |
| 1832 | int complain; |
| 1833 | { |
| 1834 | int fd = -1; |
| 1835 | |
| 1836 | if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0) |
| 1837 | { |
| 1838 | if (complain) |
| 1839 | { |
| 1840 | print_sys_errmsg (pi->pathname, errno); |
| 1841 | warning ("can't find mapped file for address 0x%x", addr); |
| 1842 | } |
| 1843 | } |
| 1844 | return (fd); |
| 1845 | } |
| 1846 | |
| 1847 | |
| 1848 | /* Attach to process PID, then initialize for debugging it |
| 1849 | and wait for the trace-trap that results from attaching. */ |
| 1850 | |
| 1851 | static void |
| 1852 | procfs_attach (args, from_tty) |
| 1853 | char *args; |
| 1854 | int from_tty; |
| 1855 | { |
| 1856 | char *exec_file; |
| 1857 | int pid; |
| 1858 | |
| 1859 | if (!args) |
| 1860 | error_no_arg ("process-id to attach"); |
| 1861 | |
| 1862 | pid = atoi (args); |
| 1863 | |
| 1864 | if (pid == getpid()) /* Trying to masturbate? */ |
| 1865 | error ("I refuse to debug myself!"); |
| 1866 | |
| 1867 | if (from_tty) |
| 1868 | { |
| 1869 | exec_file = (char *) get_exec_file (0); |
| 1870 | |
| 1871 | if (exec_file) |
| 1872 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid)); |
| 1873 | else |
| 1874 | printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid)); |
| 1875 | |
| 1876 | gdb_flush (gdb_stdout); |
| 1877 | } |
| 1878 | |
| 1879 | do_attach (pid); |
| 1880 | inferior_pid = pid; |
| 1881 | push_target (&procfs_ops); |
| 1882 | } |
| 1883 | |
| 1884 | |
| 1885 | /* Take a program previously attached to and detaches it. |
| 1886 | The program resumes execution and will no longer stop |
| 1887 | on signals, etc. We'd better not have left any breakpoints |
| 1888 | in the program or it'll die when it hits one. For this |
| 1889 | to work, it may be necessary for the process to have been |
| 1890 | previously attached. It *might* work if the program was |
| 1891 | started via the normal ptrace (PTRACE_TRACEME). */ |
| 1892 | |
| 1893 | static void |
| 1894 | procfs_detach (args, from_tty) |
| 1895 | char *args; |
| 1896 | int from_tty; |
| 1897 | { |
| 1898 | int siggnal = 0; |
| 1899 | |
| 1900 | if (from_tty) |
| 1901 | { |
| 1902 | char *exec_file = get_exec_file (0); |
| 1903 | if (exec_file == 0) |
| 1904 | exec_file = ""; |
| 1905 | printf_unfiltered ("Detaching from program: %s %s\n", |
| 1906 | exec_file, target_pid_to_str (inferior_pid)); |
| 1907 | gdb_flush (gdb_stdout); |
| 1908 | } |
| 1909 | if (args) |
| 1910 | siggnal = atoi (args); |
| 1911 | |
| 1912 | do_detach (siggnal); |
| 1913 | inferior_pid = 0; |
| 1914 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ |
| 1915 | } |
| 1916 | |
| 1917 | /* Get ready to modify the registers array. On machines which store |
| 1918 | individual registers, this doesn't need to do anything. On machines |
| 1919 | which store all the registers in one fell swoop, this makes sure |
| 1920 | that registers contains all the registers from the program being |
| 1921 | debugged. */ |
| 1922 | |
| 1923 | static void |
| 1924 | procfs_prepare_to_store () |
| 1925 | { |
| 1926 | #ifdef CHILD_PREPARE_TO_STORE |
| 1927 | CHILD_PREPARE_TO_STORE (); |
| 1928 | #endif |
| 1929 | } |
| 1930 | |
| 1931 | /* Print status information about what we're accessing. */ |
| 1932 | |
| 1933 | static void |
| 1934 | procfs_files_info (ignore) |
| 1935 | struct target_ops *ignore; |
| 1936 | { |
| 1937 | printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n", |
| 1938 | attach_flag? "attached": "child", target_pid_to_str (inferior_pid)); |
| 1939 | } |
| 1940 | |
| 1941 | /* ARGSUSED */ |
| 1942 | static void |
| 1943 | procfs_open (arg, from_tty) |
| 1944 | char *arg; |
| 1945 | int from_tty; |
| 1946 | { |
| 1947 | error ("Use the \"run\" command to start a Unix child process."); |
| 1948 | } |
| 1949 | |
| 1950 | /* |
| 1951 | |
| 1952 | LOCAL FUNCTION |
| 1953 | |
| 1954 | do_attach -- attach to an already existing process |
| 1955 | |
| 1956 | SYNOPSIS |
| 1957 | |
| 1958 | int do_attach (int pid) |
| 1959 | |
| 1960 | DESCRIPTION |
| 1961 | |
| 1962 | Attach to an already existing process with the specified process |
| 1963 | id. If the process is not already stopped, query whether to |
| 1964 | stop it or not. |
| 1965 | |
| 1966 | NOTES |
| 1967 | |
| 1968 | The option of stopping at attach time is specific to the /proc |
| 1969 | versions of gdb. Versions using ptrace force the attachee |
| 1970 | to stop. (I have changed this version to do so, too. All you |
| 1971 | have to do is "continue" to make it go on. -- gnu@cygnus.com) |
| 1972 | |
| 1973 | */ |
| 1974 | |
| 1975 | static int |
| 1976 | do_attach (pid) |
| 1977 | int pid; |
| 1978 | { |
| 1979 | int result; |
| 1980 | struct procinfo *pi; |
| 1981 | |
| 1982 | pi = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
| 1983 | |
| 1984 | if (!open_proc_file (pid, pi, O_RDWR)) |
| 1985 | { |
| 1986 | free (pi); |
| 1987 | perror_with_name (pi->pathname); |
| 1988 | /* NOTREACHED */ |
| 1989 | } |
| 1990 | |
| 1991 | /* Add new process to process info list */ |
| 1992 | |
| 1993 | pi->next = procinfo_list; |
| 1994 | procinfo_list = pi; |
| 1995 | |
| 1996 | add_fd (pi); /* Add to list for poll/select */ |
| 1997 | |
| 1998 | /* Get current status of process and if it is not already stopped, |
| 1999 | then stop it. Remember whether or not it was stopped when we first |
| 2000 | examined it. */ |
| 2001 | |
| 2002 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
| 2003 | { |
| 2004 | print_sys_errmsg (pi->pathname, errno); |
| 2005 | close_proc_file (pi); |
| 2006 | error ("PIOCSTATUS failed"); |
| 2007 | } |
| 2008 | if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 2009 | { |
| 2010 | pi->was_stopped = 1; |
| 2011 | } |
| 2012 | else |
| 2013 | { |
| 2014 | pi->was_stopped = 0; |
| 2015 | if (1 || query ("Process is currently running, stop it? ")) |
| 2016 | { |
| 2017 | /* Make it run again when we close it. */ |
| 2018 | #if defined (PIOCSET) /* New method */ |
| 2019 | { |
| 2020 | long pr_flags; |
| 2021 | pr_flags = PR_RLC; |
| 2022 | result = ioctl (pi->fd, PIOCSET, &pr_flags); |
| 2023 | } |
| 2024 | #else |
| 2025 | #if defined (PIOCSRLC) /* Original method */ |
| 2026 | result = ioctl (pi->fd, PIOCSRLC, 0); |
| 2027 | #endif |
| 2028 | #endif |
| 2029 | if (result < 0) |
| 2030 | { |
| 2031 | print_sys_errmsg (pi->pathname, errno); |
| 2032 | close_proc_file (pi); |
| 2033 | error ("PIOCSRLC or PIOCSET failed"); |
| 2034 | } |
| 2035 | if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0) |
| 2036 | { |
| 2037 | print_sys_errmsg (pi->pathname, errno); |
| 2038 | close_proc_file (pi); |
| 2039 | error ("PIOCSTOP failed"); |
| 2040 | } |
| 2041 | pi->nopass_next_sigstop = 1; |
| 2042 | } |
| 2043 | else |
| 2044 | { |
| 2045 | printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid)); |
| 2046 | } |
| 2047 | } |
| 2048 | |
| 2049 | /* Remember some things about the inferior that we will, or might, change |
| 2050 | so that we can restore them when we detach. */ |
| 2051 | |
| 2052 | ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace); |
| 2053 | ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold); |
| 2054 | ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset); |
| 2055 | ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset); |
| 2056 | ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset); |
| 2057 | |
| 2058 | /* Set up trace and fault sets, as gdb expects them. */ |
| 2059 | |
| 2060 | memset (&pi->prrun, 0, sizeof (pi->prrun)); |
| 2061 | prfillset (&pi->prrun.pr_trace); |
| 2062 | procfs_notice_signals (pid); |
| 2063 | prfillset (&pi->prrun.pr_fault); |
| 2064 | prdelset (&pi->prrun.pr_fault, FLTPAGE); |
| 2065 | |
| 2066 | #ifdef PROCFS_DONT_TRACE_FAULTS |
| 2067 | premptyset (&pi->prrun.pr_fault); |
| 2068 | #endif |
| 2069 | |
| 2070 | if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault)) |
| 2071 | { |
| 2072 | print_sys_errmsg ("PIOCSFAULT failed", errno); |
| 2073 | } |
| 2074 | if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace)) |
| 2075 | { |
| 2076 | print_sys_errmsg ("PIOCSTRACE failed", errno); |
| 2077 | } |
| 2078 | attach_flag = 1; |
| 2079 | return (pid); |
| 2080 | } |
| 2081 | |
| 2082 | /* |
| 2083 | |
| 2084 | LOCAL FUNCTION |
| 2085 | |
| 2086 | do_detach -- detach from an attached-to process |
| 2087 | |
| 2088 | SYNOPSIS |
| 2089 | |
| 2090 | void do_detach (int signal) |
| 2091 | |
| 2092 | DESCRIPTION |
| 2093 | |
| 2094 | Detach from the current attachee. |
| 2095 | |
| 2096 | If signal is non-zero, the attachee is started running again and sent |
| 2097 | the specified signal. |
| 2098 | |
| 2099 | If signal is zero and the attachee was not already stopped when we |
| 2100 | attached to it, then we make it runnable again when we detach. |
| 2101 | |
| 2102 | Otherwise, we query whether or not to make the attachee runnable |
| 2103 | again, since we may simply want to leave it in the state it was in |
| 2104 | when we attached. |
| 2105 | |
| 2106 | We report any problems, but do not consider them errors, since we |
| 2107 | MUST detach even if some things don't seem to go right. This may not |
| 2108 | be the ideal situation. (FIXME). |
| 2109 | */ |
| 2110 | |
| 2111 | static void |
| 2112 | do_detach (signal) |
| 2113 | int signal; |
| 2114 | { |
| 2115 | int result; |
| 2116 | struct procinfo *pi; |
| 2117 | |
| 2118 | pi = current_procinfo; |
| 2119 | |
| 2120 | if (signal) |
| 2121 | { |
| 2122 | set_proc_siginfo (pi, signal); |
| 2123 | } |
| 2124 | if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0) |
| 2125 | { |
| 2126 | print_sys_errmsg (pi->pathname, errno); |
| 2127 | printf_unfiltered ("PIOCSEXIT failed.\n"); |
| 2128 | } |
| 2129 | if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0) |
| 2130 | { |
| 2131 | print_sys_errmsg (pi->pathname, errno); |
| 2132 | printf_unfiltered ("PIOCSENTRY failed.\n"); |
| 2133 | } |
| 2134 | if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0) |
| 2135 | { |
| 2136 | print_sys_errmsg (pi->pathname, errno); |
| 2137 | printf_unfiltered ("PIOCSTRACE failed.\n"); |
| 2138 | } |
| 2139 | if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0) |
| 2140 | { |
| 2141 | print_sys_errmsg (pi->pathname, errno); |
| 2142 | printf_unfiltered ("PIOSCHOLD failed.\n"); |
| 2143 | } |
| 2144 | if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0) |
| 2145 | { |
| 2146 | print_sys_errmsg (pi->pathname, errno); |
| 2147 | printf_unfiltered ("PIOCSFAULT failed.\n"); |
| 2148 | } |
| 2149 | if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0) |
| 2150 | { |
| 2151 | print_sys_errmsg (pi->pathname, errno); |
| 2152 | printf_unfiltered ("PIOCSTATUS failed.\n"); |
| 2153 | } |
| 2154 | else |
| 2155 | { |
| 2156 | if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))) |
| 2157 | { |
| 2158 | if (signal || !pi->was_stopped || |
| 2159 | query ("Was stopped when attached, make it runnable again? ")) |
| 2160 | { |
| 2161 | /* Clear any pending signal if we want to detach without |
| 2162 | a signal. */ |
| 2163 | if (signal == 0) |
| 2164 | set_proc_siginfo (pi, signal); |
| 2165 | |
| 2166 | /* Clear any fault that might have stopped it. */ |
| 2167 | if (ioctl (pi->fd, PIOCCFAULT, 0)) |
| 2168 | { |
| 2169 | print_sys_errmsg (pi->pathname, errno); |
| 2170 | printf_unfiltered ("PIOCCFAULT failed.\n"); |
| 2171 | } |
| 2172 | |
| 2173 | /* Make it run again when we close it. */ |
| 2174 | #if defined (PIOCSET) /* New method */ |
| 2175 | { |
| 2176 | long pr_flags; |
| 2177 | pr_flags = PR_RLC; |
| 2178 | result = ioctl (pi->fd, PIOCSET, &pr_flags); |
| 2179 | } |
| 2180 | #else |
| 2181 | #if defined (PIOCSRLC) /* Original method */ |
| 2182 | result = ioctl (pi->fd, PIOCSRLC, 0); |
| 2183 | #endif |
| 2184 | #endif |
| 2185 | if (result) |
| 2186 | { |
| 2187 | print_sys_errmsg (pi->pathname, errno); |
| 2188 | printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n"); |
| 2189 | } |
| 2190 | } |
| 2191 | } |
| 2192 | } |
| 2193 | close_proc_file (pi); |
| 2194 | attach_flag = 0; |
| 2195 | } |
| 2196 | |
| 2197 | /* emulate wait() as much as possible. |
| 2198 | Wait for child to do something. Return pid of child, or -1 in case |
| 2199 | of error; store status in *OURSTATUS. |
| 2200 | |
| 2201 | Not sure why we can't |
| 2202 | just use wait(), but it seems to have problems when applied to a |
| 2203 | process being controlled with the /proc interface. |
| 2204 | |
| 2205 | We have a race problem here with no obvious solution. We need to let |
| 2206 | the inferior run until it stops on an event of interest, which means |
| 2207 | that we need to use the PIOCWSTOP ioctl. However, we cannot use this |
| 2208 | ioctl if the process is already stopped on something that is not an |
| 2209 | event of interest, or the call will hang indefinitely. Thus we first |
| 2210 | use PIOCSTATUS to see if the process is not stopped. If not, then we |
| 2211 | use PIOCWSTOP. But during the window between the two, if the process |
| 2212 | stops for any reason that is not an event of interest (such as a job |
| 2213 | control signal) then gdb will hang. One possible workaround is to set |
| 2214 | an alarm to wake up every minute of so and check to see if the process |
| 2215 | is still running, and if so, then reissue the PIOCWSTOP. But this is |
| 2216 | a real kludge, so has not been implemented. FIXME: investigate |
| 2217 | alternatives. |
| 2218 | |
| 2219 | FIXME: Investigate why wait() seems to have problems with programs |
| 2220 | being control by /proc routines. */ |
| 2221 | |
| 2222 | static int |
| 2223 | procfs_wait (pid, ourstatus) |
| 2224 | int pid; |
| 2225 | struct target_waitstatus *ourstatus; |
| 2226 | { |
| 2227 | short what; |
| 2228 | short why; |
| 2229 | int statval = 0; |
| 2230 | int checkerr = 0; |
| 2231 | int rtnval = -1; |
| 2232 | struct procinfo *pi; |
| 2233 | |
| 2234 | if (pid != -1) /* Non-specific process? */ |
| 2235 | pi = NULL; |
| 2236 | else |
| 2237 | for (pi = procinfo_list; pi; pi = pi->next) |
| 2238 | if (pi->had_event) |
| 2239 | break; |
| 2240 | |
| 2241 | if (!pi) |
| 2242 | { |
| 2243 | wait_again: |
| 2244 | |
| 2245 | pi = wait_fd (); |
| 2246 | } |
| 2247 | |
| 2248 | if (pid != -1) |
| 2249 | for (pi = procinfo_list; pi; pi = pi->next) |
| 2250 | if (pi->pid == pid && pi->had_event) |
| 2251 | break; |
| 2252 | |
| 2253 | if (!pi && !checkerr) |
| 2254 | goto wait_again; |
| 2255 | |
| 2256 | if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))) |
| 2257 | { |
| 2258 | if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0) |
| 2259 | { |
| 2260 | checkerr++; |
| 2261 | } |
| 2262 | } |
| 2263 | if (checkerr) |
| 2264 | { |
| 2265 | if (errno == ENOENT) |
| 2266 | { |
| 2267 | rtnval = wait (&statval); |
| 2268 | if (rtnval != inferior_pid) |
| 2269 | { |
| 2270 | print_sys_errmsg (pi->pathname, errno); |
| 2271 | error ("PIOCWSTOP, wait failed, returned %d", rtnval); |
| 2272 | /* NOTREACHED */ |
| 2273 | } |
| 2274 | } |
| 2275 | else |
| 2276 | { |
| 2277 | print_sys_errmsg (pi->pathname, errno); |
| 2278 | error ("PIOCSTATUS or PIOCWSTOP failed."); |
| 2279 | /* NOTREACHED */ |
| 2280 | } |
| 2281 | } |
| 2282 | else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 2283 | { |
| 2284 | rtnval = pi->prstatus.pr_pid; |
| 2285 | why = pi->prstatus.pr_why; |
| 2286 | what = pi->prstatus.pr_what; |
| 2287 | |
| 2288 | switch (why) |
| 2289 | { |
| 2290 | case PR_SIGNALLED: |
| 2291 | statval = (what << 8) | 0177; |
| 2292 | break; |
| 2293 | case PR_SYSENTRY: |
| 2294 | if (what != SYS_exit) |
| 2295 | error ("PR_SYSENTRY, unknown system call %d", what); |
| 2296 | |
| 2297 | pi->prrun.pr_flags = PRCFAULT; |
| 2298 | |
| 2299 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) |
| 2300 | perror_with_name (pi->pathname); |
| 2301 | |
| 2302 | rtnval = wait (&statval); |
| 2303 | |
| 2304 | break; |
| 2305 | case PR_SYSEXIT: |
| 2306 | switch (what) |
| 2307 | { |
| 2308 | #ifdef SYS_exec |
| 2309 | case SYS_exec: |
| 2310 | #endif |
| 2311 | #ifdef SYS_execve |
| 2312 | case SYS_execve: |
| 2313 | #endif |
| 2314 | #ifdef SYS_execv |
| 2315 | case SYS_execv: |
| 2316 | #endif |
| 2317 | statval = (SIGTRAP << 8) | 0177; |
| 2318 | break; |
| 2319 | #ifdef SYS_sproc |
| 2320 | case SYS_sproc: |
| 2321 | /* We've just detected the completion of an sproc system call. Now we need to |
| 2322 | setup a procinfo struct for this thread, and notify the thread system of the |
| 2323 | new arrival. */ |
| 2324 | |
| 2325 | /* If sproc failed, then nothing interesting happened. Continue the process and |
| 2326 | go back to sleep. */ |
| 2327 | |
| 2328 | if (pi->prstatus.pr_errno != 0) |
| 2329 | { |
| 2330 | pi->prrun.pr_flags &= PRSTEP; |
| 2331 | pi->prrun.pr_flags |= PRCFAULT; |
| 2332 | |
| 2333 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) |
| 2334 | perror_with_name (pi->pathname); |
| 2335 | |
| 2336 | goto wait_again; |
| 2337 | } |
| 2338 | |
| 2339 | /* At this point, the new thread is stopped at it's first instruction, and |
| 2340 | the parent is stopped at the exit from sproc. */ |
| 2341 | |
| 2342 | /* Notify the caller of the arrival of a new thread. */ |
| 2343 | create_procinfo (pi->prstatus.pr_rval1); |
| 2344 | |
| 2345 | rtnval = pi->prstatus.pr_rval1; |
| 2346 | statval = (SIGTRAP << 8) | 0177; |
| 2347 | |
| 2348 | break; |
| 2349 | case SYS_fork: |
| 2350 | #ifdef SYS_vfork |
| 2351 | case SYS_vfork: |
| 2352 | #endif |
| 2353 | /* At this point, we've detected the completion of a fork (or vfork) call in |
| 2354 | our child. The grandchild is also stopped because we set inherit-on-fork |
| 2355 | earlier. (Note that nobody has the grandchilds' /proc file open at this |
| 2356 | point.) We will release the grandchild from the debugger by opening it's |
| 2357 | /proc file and then closing it. Since run-on-last-close is set, the |
| 2358 | grandchild continues on its' merry way. */ |
| 2359 | |
| 2360 | { |
| 2361 | struct procinfo *pitemp; |
| 2362 | |
| 2363 | pitemp = create_procinfo (pi->prstatus.pr_rval1); |
| 2364 | if (pitemp) |
| 2365 | close_proc_file (pitemp); |
| 2366 | |
| 2367 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) |
| 2368 | perror_with_name (pi->pathname); |
| 2369 | } |
| 2370 | goto wait_again; |
| 2371 | #endif /* SYS_sproc */ |
| 2372 | |
| 2373 | default: |
| 2374 | error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what); |
| 2375 | } |
| 2376 | break; |
| 2377 | case PR_REQUESTED: |
| 2378 | statval = (SIGSTOP << 8) | 0177; |
| 2379 | break; |
| 2380 | case PR_JOBCONTROL: |
| 2381 | statval = (what << 8) | 0177; |
| 2382 | break; |
| 2383 | case PR_FAULTED: |
| 2384 | switch (what) |
| 2385 | { |
| 2386 | #ifdef FLTWATCH |
| 2387 | case FLTWATCH: |
| 2388 | statval = (SIGTRAP << 8) | 0177; |
| 2389 | break; |
| 2390 | #endif |
| 2391 | #ifdef FLTKWATCH |
| 2392 | case FLTKWATCH: |
| 2393 | statval = (SIGTRAP << 8) | 0177; |
| 2394 | break; |
| 2395 | #endif |
| 2396 | #ifndef FAULTED_USE_SIGINFO |
| 2397 | /* Irix, contrary to the documentation, fills in 0 for si_signo. |
| 2398 | Solaris fills in si_signo. I'm not sure about others. */ |
| 2399 | case FLTPRIV: |
| 2400 | case FLTILL: |
| 2401 | statval = (SIGILL << 8) | 0177; |
| 2402 | break; |
| 2403 | case FLTBPT: |
| 2404 | case FLTTRACE: |
| 2405 | statval = (SIGTRAP << 8) | 0177; |
| 2406 | break; |
| 2407 | case FLTSTACK: |
| 2408 | case FLTACCESS: |
| 2409 | case FLTBOUNDS: |
| 2410 | statval = (SIGSEGV << 8) | 0177; |
| 2411 | break; |
| 2412 | case FLTIOVF: |
| 2413 | case FLTIZDIV: |
| 2414 | case FLTFPE: |
| 2415 | statval = (SIGFPE << 8) | 0177; |
| 2416 | break; |
| 2417 | case FLTPAGE: /* Recoverable page fault */ |
| 2418 | #endif /* not FAULTED_USE_SIGINFO */ |
| 2419 | default: |
| 2420 | /* Use the signal which the kernel assigns. This is better than |
| 2421 | trying to second-guess it from the fault. In fact, I suspect |
| 2422 | that FLTACCESS can be either SIGSEGV or SIGBUS. */ |
| 2423 | statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177; |
| 2424 | break; |
| 2425 | } |
| 2426 | break; |
| 2427 | default: |
| 2428 | error ("PIOCWSTOP, unknown why %d, what %d", why, what); |
| 2429 | } |
| 2430 | /* Stop all the other threads when any of them stops. */ |
| 2431 | |
| 2432 | { |
| 2433 | struct procinfo *procinfo; |
| 2434 | |
| 2435 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 2436 | { |
| 2437 | if (!procinfo->had_event) |
| 2438 | if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0) |
| 2439 | { |
| 2440 | print_sys_errmsg (procinfo->pathname, errno); |
| 2441 | error ("PIOCSTOP failed"); |
| 2442 | } |
| 2443 | } |
| 2444 | } |
| 2445 | } |
| 2446 | else |
| 2447 | { |
| 2448 | error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x", |
| 2449 | pi->prstatus.pr_flags); |
| 2450 | } |
| 2451 | |
| 2452 | store_waitstatus (ourstatus, statval); |
| 2453 | |
| 2454 | if (rtnval == -1) /* No more children to wait for */ |
| 2455 | { |
| 2456 | fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n"); |
| 2457 | /* Claim it exited with unknown signal. */ |
| 2458 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| 2459 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
| 2460 | return rtnval; |
| 2461 | } |
| 2462 | |
| 2463 | pi->had_event = 0; /* Indicate that we've seen this one */ |
| 2464 | return (rtnval); |
| 2465 | } |
| 2466 | |
| 2467 | /* |
| 2468 | |
| 2469 | LOCAL FUNCTION |
| 2470 | |
| 2471 | set_proc_siginfo - set a process's current signal info |
| 2472 | |
| 2473 | SYNOPSIS |
| 2474 | |
| 2475 | void set_proc_siginfo (struct procinfo *pip, int signo); |
| 2476 | |
| 2477 | DESCRIPTION |
| 2478 | |
| 2479 | Given a pointer to a process info struct in PIP and a signal number |
| 2480 | in SIGNO, set the process's current signal and its associated signal |
| 2481 | information. The signal will be delivered to the process immediately |
| 2482 | after execution is resumed, even if it is being held. In addition, |
| 2483 | this particular delivery will not cause another PR_SIGNALLED stop |
| 2484 | even if the signal is being traced. |
| 2485 | |
| 2486 | If we are not delivering the same signal that the prstatus siginfo |
| 2487 | struct contains information about, then synthesize a siginfo struct |
| 2488 | to match the signal we are doing to deliver, make it of the type |
| 2489 | "generated by a user process", and send this synthesized copy. When |
| 2490 | used to set the inferior's signal state, this will be required if we |
| 2491 | are not currently stopped because of a traced signal, or if we decide |
| 2492 | to continue with a different signal. |
| 2493 | |
| 2494 | Note that when continuing the inferior from a stop due to receipt |
| 2495 | of a traced signal, we either have set PRCSIG to clear the existing |
| 2496 | signal, or we have to call this function to do a PIOCSSIG with either |
| 2497 | the existing siginfo struct from pr_info, or one we have synthesized |
| 2498 | appropriately for the signal we want to deliver. Otherwise if the |
| 2499 | signal is still being traced, the inferior will immediately stop |
| 2500 | again. |
| 2501 | |
| 2502 | See siginfo(5) for more details. |
| 2503 | */ |
| 2504 | |
| 2505 | static void |
| 2506 | set_proc_siginfo (pip, signo) |
| 2507 | struct procinfo *pip; |
| 2508 | int signo; |
| 2509 | { |
| 2510 | struct siginfo newsiginfo; |
| 2511 | struct siginfo *sip; |
| 2512 | |
| 2513 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
| 2514 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it |
| 2515 | receives a PIOCSSIG with a signal identical to the current signal, |
| 2516 | it messes up the current signal. Work around the kernel bug. */ |
| 2517 | if (signo == pip -> prstatus.pr_cursig) |
| 2518 | return; |
| 2519 | #endif |
| 2520 | |
| 2521 | if (signo == pip -> prstatus.pr_info.si_signo) |
| 2522 | { |
| 2523 | sip = &pip -> prstatus.pr_info; |
| 2524 | } |
| 2525 | else |
| 2526 | { |
| 2527 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
| 2528 | sip = &newsiginfo; |
| 2529 | sip -> si_signo = signo; |
| 2530 | sip -> si_code = 0; |
| 2531 | sip -> si_errno = 0; |
| 2532 | sip -> si_pid = getpid (); |
| 2533 | sip -> si_uid = getuid (); |
| 2534 | } |
| 2535 | if (ioctl (pip -> fd, PIOCSSIG, sip) < 0) |
| 2536 | { |
| 2537 | print_sys_errmsg (pip -> pathname, errno); |
| 2538 | warning ("PIOCSSIG failed"); |
| 2539 | } |
| 2540 | } |
| 2541 | |
| 2542 | /* Resume execution of process PID. If STEP is nozero, then |
| 2543 | just single step it. If SIGNAL is nonzero, restart it with that |
| 2544 | signal activated. */ |
| 2545 | |
| 2546 | static void |
| 2547 | procfs_resume (pid, step, signo) |
| 2548 | int pid; |
| 2549 | int step; |
| 2550 | enum target_signal signo; |
| 2551 | { |
| 2552 | int signal_to_pass; |
| 2553 | struct procinfo *pi, *procinfo; |
| 2554 | |
| 2555 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); |
| 2556 | |
| 2557 | errno = 0; |
| 2558 | pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT; |
| 2559 | |
| 2560 | #if 0 |
| 2561 | /* It should not be necessary. If the user explicitly changes the value, |
| 2562 | value_assign calls write_register_bytes, which writes it. */ |
| 2563 | /* It may not be absolutely necessary to specify the PC value for |
| 2564 | restarting, but to be safe we use the value that gdb considers |
| 2565 | to be current. One case where this might be necessary is if the |
| 2566 | user explicitly changes the PC value that gdb considers to be |
| 2567 | current. FIXME: Investigate if this is necessary or not. */ |
| 2568 | |
| 2569 | #ifdef PRSVADDR_BROKEN |
| 2570 | /* Can't do this under Solaris running on a Sparc, as there seems to be no |
| 2571 | place to put nPC. In fact, if you use this, nPC seems to be set to some |
| 2572 | random garbage. We have to rely on the fact that PC and nPC have been |
| 2573 | written previously via PIOCSREG during a register flush. */ |
| 2574 | |
| 2575 | pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)]; |
| 2576 | pi->prrun.pr_flags != PRSVADDR; |
| 2577 | #endif |
| 2578 | #endif |
| 2579 | |
| 2580 | if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop) |
| 2581 | /* When attaching to a child process, if we forced it to stop with |
| 2582 | a PIOCSTOP, then we will have set the nopass_next_sigstop flag. |
| 2583 | Upon resuming the first time after such a stop, we explicitly |
| 2584 | inhibit sending it another SIGSTOP, which would be the normal |
| 2585 | result of default signal handling. One potential drawback to |
| 2586 | this is that we will also ignore any attempt to by the user |
| 2587 | to explicitly continue after the attach with a SIGSTOP. Ultimately |
| 2588 | this problem should be dealt with by making the routines that |
| 2589 | deal with the inferior a little smarter, and possibly even allow |
| 2590 | an inferior to continue running at the same time as gdb. (FIXME?) */ |
| 2591 | signal_to_pass = 0; |
| 2592 | else if (signo == TARGET_SIGNAL_TSTP |
| 2593 | && pi->prstatus.pr_cursig == SIGTSTP |
| 2594 | && pi->prstatus.pr_action.sa_handler == SIG_DFL) |
| 2595 | |
| 2596 | /* We are about to pass the inferior a SIGTSTP whose action is |
| 2597 | SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop |
| 2598 | (notifying the parent via wait()), and then keep going from the |
| 2599 | same place when the parent is ready for you to keep going. So |
| 2600 | under the debugger, it should do nothing (as if the program had |
| 2601 | been stopped and then later resumed. Under ptrace, this |
| 2602 | happens for us, but under /proc, the system obligingly stops |
| 2603 | the process, and wait_for_inferior would have no way of |
| 2604 | distinguishing that type of stop (which indicates that we |
| 2605 | should just start it again), with a stop due to the pr_trace |
| 2606 | field of the prrun_t struct. |
| 2607 | |
| 2608 | Note that if the SIGTSTP is being caught, we *do* need to pass it, |
| 2609 | because the handler needs to get executed. */ |
| 2610 | signal_to_pass = 0; |
| 2611 | else |
| 2612 | signal_to_pass = target_signal_to_host (signo); |
| 2613 | |
| 2614 | if (signal_to_pass) |
| 2615 | { |
| 2616 | set_proc_siginfo (pi, signal_to_pass); |
| 2617 | } |
| 2618 | else |
| 2619 | { |
| 2620 | pi->prrun.pr_flags |= PRCSIG; |
| 2621 | } |
| 2622 | pi->nopass_next_sigstop = 0; |
| 2623 | if (step) |
| 2624 | { |
| 2625 | pi->prrun.pr_flags |= PRSTEP; |
| 2626 | } |
| 2627 | if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0) |
| 2628 | { |
| 2629 | perror_with_name (pi->pathname); |
| 2630 | /* NOTREACHED */ |
| 2631 | } |
| 2632 | |
| 2633 | pi->had_event = 0; |
| 2634 | |
| 2635 | /* Continue all the other threads that haven't had an event of |
| 2636 | interest. */ |
| 2637 | |
| 2638 | if (pid == -1) |
| 2639 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 2640 | { |
| 2641 | if (pi != procinfo && !procinfo->had_event) |
| 2642 | { |
| 2643 | procinfo->prrun.pr_flags &= PRSTEP; |
| 2644 | procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG; |
| 2645 | ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus); |
| 2646 | if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0) |
| 2647 | { |
| 2648 | if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0) |
| 2649 | { |
| 2650 | fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno); |
| 2651 | } |
| 2652 | print_sys_errmsg (procinfo->pathname, errno); |
| 2653 | error ("PIOCRUN failed"); |
| 2654 | } |
| 2655 | ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus); |
| 2656 | } |
| 2657 | } |
| 2658 | } |
| 2659 | |
| 2660 | /* |
| 2661 | |
| 2662 | LOCAL FUNCTION |
| 2663 | |
| 2664 | procfs_fetch_registers -- fetch current registers from inferior |
| 2665 | |
| 2666 | SYNOPSIS |
| 2667 | |
| 2668 | void procfs_fetch_registers (int regno) |
| 2669 | |
| 2670 | DESCRIPTION |
| 2671 | |
| 2672 | Read the current values of the inferior's registers, both the |
| 2673 | general register set and floating point registers (if supported) |
| 2674 | and update gdb's idea of their current values. |
| 2675 | |
| 2676 | */ |
| 2677 | |
| 2678 | static void |
| 2679 | procfs_fetch_registers (regno) |
| 2680 | int regno; |
| 2681 | { |
| 2682 | struct procinfo *pi; |
| 2683 | |
| 2684 | pi = current_procinfo; |
| 2685 | |
| 2686 | if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1) |
| 2687 | { |
| 2688 | supply_gregset (&pi->gregset); |
| 2689 | } |
| 2690 | #if defined (FP0_REGNUM) |
| 2691 | if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1) |
| 2692 | { |
| 2693 | supply_fpregset (&pi->fpregset); |
| 2694 | } |
| 2695 | #endif |
| 2696 | } |
| 2697 | |
| 2698 | /* |
| 2699 | |
| 2700 | LOCAL FUNCTION |
| 2701 | |
| 2702 | proc_init_failed - called whenever /proc access initialization |
| 2703 | fails |
| 2704 | |
| 2705 | SYNOPSIS |
| 2706 | |
| 2707 | static void proc_init_failed (struct procinfo *pi, char *why) |
| 2708 | |
| 2709 | DESCRIPTION |
| 2710 | |
| 2711 | This function is called whenever initialization of access to a /proc |
| 2712 | entry fails. It prints a suitable error message, does some cleanup, |
| 2713 | and then invokes the standard error processing routine which dumps |
| 2714 | us back into the command loop. |
| 2715 | */ |
| 2716 | |
| 2717 | static void |
| 2718 | proc_init_failed (pi, why) |
| 2719 | struct procinfo *pi; |
| 2720 | char *why; |
| 2721 | { |
| 2722 | print_sys_errmsg (pi->pathname, errno); |
| 2723 | kill (pi->pid, SIGKILL); |
| 2724 | close_proc_file (pi); |
| 2725 | error (why); |
| 2726 | /* NOTREACHED */ |
| 2727 | } |
| 2728 | |
| 2729 | /* |
| 2730 | |
| 2731 | LOCAL FUNCTION |
| 2732 | |
| 2733 | close_proc_file - close any currently open /proc entry |
| 2734 | |
| 2735 | SYNOPSIS |
| 2736 | |
| 2737 | static void close_proc_file (struct procinfo *pip) |
| 2738 | |
| 2739 | DESCRIPTION |
| 2740 | |
| 2741 | Close any currently open /proc entry and mark the process information |
| 2742 | entry as invalid. In order to ensure that we don't try to reuse any |
| 2743 | stale information, the pid, fd, and pathnames are explicitly |
| 2744 | invalidated, which may be overkill. |
| 2745 | |
| 2746 | */ |
| 2747 | |
| 2748 | static void |
| 2749 | close_proc_file (pip) |
| 2750 | struct procinfo *pip; |
| 2751 | { |
| 2752 | struct procinfo *procinfo; |
| 2753 | |
| 2754 | remove_fd (pip); /* Remove fd from poll/select list */ |
| 2755 | |
| 2756 | close (pip -> fd); |
| 2757 | |
| 2758 | free (pip -> pathname); |
| 2759 | |
| 2760 | /* Unlink pip from the procinfo chain. Note pip might not be on the list. */ |
| 2761 | |
| 2762 | if (procinfo_list == pip) |
| 2763 | procinfo_list = pip->next; |
| 2764 | else |
| 2765 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 2766 | if (procinfo->next == pip) |
| 2767 | procinfo->next = pip->next; |
| 2768 | |
| 2769 | free (pip); |
| 2770 | } |
| 2771 | |
| 2772 | /* |
| 2773 | |
| 2774 | LOCAL FUNCTION |
| 2775 | |
| 2776 | open_proc_file - open a /proc entry for a given process id |
| 2777 | |
| 2778 | SYNOPSIS |
| 2779 | |
| 2780 | static int open_proc_file (int pid, struct procinfo *pip, int mode) |
| 2781 | |
| 2782 | DESCRIPTION |
| 2783 | |
| 2784 | Given a process id and a mode, close the existing open /proc |
| 2785 | entry (if any) and open one for the new process id, in the |
| 2786 | specified mode. Once it is open, then mark the local process |
| 2787 | information structure as valid, which guarantees that the pid, |
| 2788 | fd, and pathname fields match an open /proc entry. Returns |
| 2789 | zero if the open fails, nonzero otherwise. |
| 2790 | |
| 2791 | Note that the pathname is left intact, even when the open fails, |
| 2792 | so that callers can use it to construct meaningful error messages |
| 2793 | rather than just "file open failed". |
| 2794 | */ |
| 2795 | |
| 2796 | static int |
| 2797 | open_proc_file (pid, pip, mode) |
| 2798 | int pid; |
| 2799 | struct procinfo *pip; |
| 2800 | int mode; |
| 2801 | { |
| 2802 | pip -> next = NULL; |
| 2803 | pip -> had_event = 0; |
| 2804 | pip -> pathname = xmalloc (32); |
| 2805 | pip -> pid = pid; |
| 2806 | |
| 2807 | sprintf (pip -> pathname, PROC_NAME_FMT, pid); |
| 2808 | if ((pip -> fd = open (pip -> pathname, mode)) < 0) |
| 2809 | return 0; |
| 2810 | |
| 2811 | return 1; |
| 2812 | } |
| 2813 | |
| 2814 | static char * |
| 2815 | mappingflags (flags) |
| 2816 | long flags; |
| 2817 | { |
| 2818 | static char asciiflags[8]; |
| 2819 | |
| 2820 | strcpy (asciiflags, "-------"); |
| 2821 | #if defined (MA_PHYS) |
| 2822 | if (flags & MA_PHYS) asciiflags[0] = 'd'; |
| 2823 | #endif |
| 2824 | if (flags & MA_STACK) asciiflags[1] = 's'; |
| 2825 | if (flags & MA_BREAK) asciiflags[2] = 'b'; |
| 2826 | if (flags & MA_SHARED) asciiflags[3] = 's'; |
| 2827 | if (flags & MA_READ) asciiflags[4] = 'r'; |
| 2828 | if (flags & MA_WRITE) asciiflags[5] = 'w'; |
| 2829 | if (flags & MA_EXEC) asciiflags[6] = 'x'; |
| 2830 | return (asciiflags); |
| 2831 | } |
| 2832 | |
| 2833 | static void |
| 2834 | info_proc_flags (pip, summary) |
| 2835 | struct procinfo *pip; |
| 2836 | int summary; |
| 2837 | { |
| 2838 | struct trans *transp; |
| 2839 | |
| 2840 | printf_filtered ("%-32s", "Process status flags:"); |
| 2841 | if (!summary) |
| 2842 | { |
| 2843 | printf_filtered ("\n\n"); |
| 2844 | } |
| 2845 | for (transp = pr_flag_table; transp -> name != NULL; transp++) |
| 2846 | { |
| 2847 | if (pip -> prstatus.pr_flags & transp -> value) |
| 2848 | { |
| 2849 | if (summary) |
| 2850 | { |
| 2851 | printf_filtered ("%s ", transp -> name); |
| 2852 | } |
| 2853 | else |
| 2854 | { |
| 2855 | printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc); |
| 2856 | } |
| 2857 | } |
| 2858 | } |
| 2859 | printf_filtered ("\n"); |
| 2860 | } |
| 2861 | |
| 2862 | static void |
| 2863 | info_proc_stop (pip, summary) |
| 2864 | struct procinfo *pip; |
| 2865 | int summary; |
| 2866 | { |
| 2867 | struct trans *transp; |
| 2868 | int why; |
| 2869 | int what; |
| 2870 | |
| 2871 | why = pip -> prstatus.pr_why; |
| 2872 | what = pip -> prstatus.pr_what; |
| 2873 | |
| 2874 | if (pip -> prstatus.pr_flags & PR_STOPPED) |
| 2875 | { |
| 2876 | printf_filtered ("%-32s", "Reason for stopping:"); |
| 2877 | if (!summary) |
| 2878 | { |
| 2879 | printf_filtered ("\n\n"); |
| 2880 | } |
| 2881 | for (transp = pr_why_table; transp -> name != NULL; transp++) |
| 2882 | { |
| 2883 | if (why == transp -> value) |
| 2884 | { |
| 2885 | if (summary) |
| 2886 | { |
| 2887 | printf_filtered ("%s ", transp -> name); |
| 2888 | } |
| 2889 | else |
| 2890 | { |
| 2891 | printf_filtered ("\t%-16s %s.\n", |
| 2892 | transp -> name, transp -> desc); |
| 2893 | } |
| 2894 | break; |
| 2895 | } |
| 2896 | } |
| 2897 | |
| 2898 | /* Use the pr_why field to determine what the pr_what field means, and |
| 2899 | print more information. */ |
| 2900 | |
| 2901 | switch (why) |
| 2902 | { |
| 2903 | case PR_REQUESTED: |
| 2904 | /* pr_what is unused for this case */ |
| 2905 | break; |
| 2906 | case PR_JOBCONTROL: |
| 2907 | case PR_SIGNALLED: |
| 2908 | if (summary) |
| 2909 | { |
| 2910 | printf_filtered ("%s ", signalname (what)); |
| 2911 | } |
| 2912 | else |
| 2913 | { |
| 2914 | printf_filtered ("\t%-16s %s.\n", signalname (what), |
| 2915 | safe_strsignal (what)); |
| 2916 | } |
| 2917 | break; |
| 2918 | case PR_SYSENTRY: |
| 2919 | if (summary) |
| 2920 | { |
| 2921 | printf_filtered ("%s ", syscallname (what)); |
| 2922 | } |
| 2923 | else |
| 2924 | { |
| 2925 | printf_filtered ("\t%-16s %s.\n", syscallname (what), |
| 2926 | "Entered this system call"); |
| 2927 | } |
| 2928 | break; |
| 2929 | case PR_SYSEXIT: |
| 2930 | if (summary) |
| 2931 | { |
| 2932 | printf_filtered ("%s ", syscallname (what)); |
| 2933 | } |
| 2934 | else |
| 2935 | { |
| 2936 | printf_filtered ("\t%-16s %s.\n", syscallname (what), |
| 2937 | "Returned from this system call"); |
| 2938 | } |
| 2939 | break; |
| 2940 | case PR_FAULTED: |
| 2941 | if (summary) |
| 2942 | { |
| 2943 | printf_filtered ("%s ", |
| 2944 | lookupname (faults_table, what, "fault")); |
| 2945 | } |
| 2946 | else |
| 2947 | { |
| 2948 | printf_filtered ("\t%-16s %s.\n", |
| 2949 | lookupname (faults_table, what, "fault"), |
| 2950 | lookupdesc (faults_table, what)); |
| 2951 | } |
| 2952 | break; |
| 2953 | } |
| 2954 | printf_filtered ("\n"); |
| 2955 | } |
| 2956 | } |
| 2957 | |
| 2958 | static void |
| 2959 | info_proc_siginfo (pip, summary) |
| 2960 | struct procinfo *pip; |
| 2961 | int summary; |
| 2962 | { |
| 2963 | struct siginfo *sip; |
| 2964 | |
| 2965 | if ((pip -> prstatus.pr_flags & PR_STOPPED) && |
| 2966 | (pip -> prstatus.pr_why == PR_SIGNALLED || |
| 2967 | pip -> prstatus.pr_why == PR_FAULTED)) |
| 2968 | { |
| 2969 | printf_filtered ("%-32s", "Additional signal/fault info:"); |
| 2970 | sip = &pip -> prstatus.pr_info; |
| 2971 | if (summary) |
| 2972 | { |
| 2973 | printf_filtered ("%s ", signalname (sip -> si_signo)); |
| 2974 | if (sip -> si_errno > 0) |
| 2975 | { |
| 2976 | printf_filtered ("%s ", errnoname (sip -> si_errno)); |
| 2977 | } |
| 2978 | if (sip -> si_code <= 0) |
| 2979 | { |
| 2980 | printf_filtered ("sent by %s, uid %d ", |
| 2981 | target_pid_to_str (sip -> si_pid), |
| 2982 | sip -> si_uid); |
| 2983 | } |
| 2984 | else |
| 2985 | { |
| 2986 | printf_filtered ("%s ", sigcodename (sip)); |
| 2987 | if ((sip -> si_signo == SIGILL) || |
| 2988 | (sip -> si_signo == SIGFPE) || |
| 2989 | (sip -> si_signo == SIGSEGV) || |
| 2990 | (sip -> si_signo == SIGBUS)) |
| 2991 | { |
| 2992 | printf_filtered ("addr=%#lx ", |
| 2993 | (unsigned long) sip -> si_addr); |
| 2994 | } |
| 2995 | else if ((sip -> si_signo == SIGCHLD)) |
| 2996 | { |
| 2997 | printf_filtered ("child %s, status %u ", |
| 2998 | target_pid_to_str (sip -> si_pid), |
| 2999 | sip -> si_status); |
| 3000 | } |
| 3001 | else if ((sip -> si_signo == SIGPOLL)) |
| 3002 | { |
| 3003 | printf_filtered ("band %u ", sip -> si_band); |
| 3004 | } |
| 3005 | } |
| 3006 | } |
| 3007 | else |
| 3008 | { |
| 3009 | printf_filtered ("\n\n"); |
| 3010 | printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo), |
| 3011 | safe_strsignal (sip -> si_signo)); |
| 3012 | if (sip -> si_errno > 0) |
| 3013 | { |
| 3014 | printf_filtered ("\t%-16s %s.\n", |
| 3015 | errnoname (sip -> si_errno), |
| 3016 | safe_strerror (sip -> si_errno)); |
| 3017 | } |
| 3018 | if (sip -> si_code <= 0) |
| 3019 | { |
| 3020 | printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */ |
| 3021 | "PID of process sending signal"); |
| 3022 | printf_filtered ("\t%-16u %s\n", sip -> si_uid, |
| 3023 | "UID of process sending signal"); |
| 3024 | } |
| 3025 | else |
| 3026 | { |
| 3027 | printf_filtered ("\t%-16s %s.\n", sigcodename (sip), |
| 3028 | sigcodedesc (sip)); |
| 3029 | if ((sip -> si_signo == SIGILL) || |
| 3030 | (sip -> si_signo == SIGFPE)) |
| 3031 | { |
| 3032 | printf_filtered ("\t%#-16lx %s.\n", |
| 3033 | (unsigned long) sip -> si_addr, |
| 3034 | "Address of faulting instruction"); |
| 3035 | } |
| 3036 | else if ((sip -> si_signo == SIGSEGV) || |
| 3037 | (sip -> si_signo == SIGBUS)) |
| 3038 | { |
| 3039 | printf_filtered ("\t%#-16lx %s.\n", |
| 3040 | (unsigned long) sip -> si_addr, |
| 3041 | "Address of faulting memory reference"); |
| 3042 | } |
| 3043 | else if ((sip -> si_signo == SIGCHLD)) |
| 3044 | { |
| 3045 | printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */ |
| 3046 | "Child process ID"); |
| 3047 | printf_filtered ("\t%-16u %s.\n", sip -> si_status, |
| 3048 | "Child process exit value or signal"); |
| 3049 | } |
| 3050 | else if ((sip -> si_signo == SIGPOLL)) |
| 3051 | { |
| 3052 | printf_filtered ("\t%-16u %s.\n", sip -> si_band, |
| 3053 | "Band event for POLL_{IN,OUT,MSG}"); |
| 3054 | } |
| 3055 | } |
| 3056 | } |
| 3057 | printf_filtered ("\n"); |
| 3058 | } |
| 3059 | } |
| 3060 | |
| 3061 | static void |
| 3062 | info_proc_syscalls (pip, summary) |
| 3063 | struct procinfo *pip; |
| 3064 | int summary; |
| 3065 | { |
| 3066 | int syscallnum; |
| 3067 | |
| 3068 | if (!summary) |
| 3069 | { |
| 3070 | |
| 3071 | #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */ |
| 3072 | if (pip -> prstatus.pr_flags & PR_ASLEEP) |
| 3073 | { |
| 3074 | int syscallnum = pip -> prstatus.pr_reg[R_D0]; |
| 3075 | if (summary) |
| 3076 | { |
| 3077 | printf_filtered ("%-32s", "Sleeping in system call:"); |
| 3078 | printf_filtered ("%s", syscallname (syscallnum)); |
| 3079 | } |
| 3080 | else |
| 3081 | { |
| 3082 | printf_filtered ("Sleeping in system call '%s'.\n", |
| 3083 | syscallname (syscallnum)); |
| 3084 | } |
| 3085 | } |
| 3086 | #endif |
| 3087 | |
| 3088 | if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0) |
| 3089 | { |
| 3090 | print_sys_errmsg (pip -> pathname, errno); |
| 3091 | error ("PIOCGENTRY failed"); |
| 3092 | } |
| 3093 | |
| 3094 | if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0) |
| 3095 | { |
| 3096 | print_sys_errmsg (pip -> pathname, errno); |
| 3097 | error ("PIOCGEXIT failed"); |
| 3098 | } |
| 3099 | |
| 3100 | printf_filtered ("System call tracing information:\n\n"); |
| 3101 | |
| 3102 | printf_filtered ("\t%-12s %-8s %-8s\n", |
| 3103 | "System call", |
| 3104 | "Entry", |
| 3105 | "Exit"); |
| 3106 | for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++) |
| 3107 | { |
| 3108 | QUIT; |
| 3109 | if (syscall_table[syscallnum] != NULL) |
| 3110 | { |
| 3111 | printf_filtered ("\t%-12s ", syscall_table[syscallnum]); |
| 3112 | printf_filtered ("%-8s ", |
| 3113 | prismember (&pip -> entryset, syscallnum) |
| 3114 | ? "on" : "off"); |
| 3115 | printf_filtered ("%-8s ", |
| 3116 | prismember (&pip -> exitset, syscallnum) |
| 3117 | ? "on" : "off"); |
| 3118 | printf_filtered ("\n"); |
| 3119 | } |
| 3120 | } |
| 3121 | printf_filtered ("\n"); |
| 3122 | } |
| 3123 | } |
| 3124 | |
| 3125 | static char * |
| 3126 | signalname (signo) |
| 3127 | int signo; |
| 3128 | { |
| 3129 | const char *name; |
| 3130 | static char locbuf[32]; |
| 3131 | |
| 3132 | name = strsigno (signo); |
| 3133 | if (name == NULL) |
| 3134 | { |
| 3135 | sprintf (locbuf, "Signal %d", signo); |
| 3136 | } |
| 3137 | else |
| 3138 | { |
| 3139 | sprintf (locbuf, "%s (%d)", name, signo); |
| 3140 | } |
| 3141 | return (locbuf); |
| 3142 | } |
| 3143 | |
| 3144 | static char * |
| 3145 | errnoname (errnum) |
| 3146 | int errnum; |
| 3147 | { |
| 3148 | const char *name; |
| 3149 | static char locbuf[32]; |
| 3150 | |
| 3151 | name = strerrno (errnum); |
| 3152 | if (name == NULL) |
| 3153 | { |
| 3154 | sprintf (locbuf, "Errno %d", errnum); |
| 3155 | } |
| 3156 | else |
| 3157 | { |
| 3158 | sprintf (locbuf, "%s (%d)", name, errnum); |
| 3159 | } |
| 3160 | return (locbuf); |
| 3161 | } |
| 3162 | |
| 3163 | static void |
| 3164 | info_proc_signals (pip, summary) |
| 3165 | struct procinfo *pip; |
| 3166 | int summary; |
| 3167 | { |
| 3168 | int signo; |
| 3169 | |
| 3170 | if (!summary) |
| 3171 | { |
| 3172 | if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0) |
| 3173 | { |
| 3174 | print_sys_errmsg (pip -> pathname, errno); |
| 3175 | error ("PIOCGTRACE failed"); |
| 3176 | } |
| 3177 | |
| 3178 | printf_filtered ("Disposition of signals:\n\n"); |
| 3179 | printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n", |
| 3180 | "Signal", "Trace", "Hold", "Pending", "Description"); |
| 3181 | for (signo = 0; signo < NSIG; signo++) |
| 3182 | { |
| 3183 | QUIT; |
| 3184 | printf_filtered ("\t%-15s ", signalname (signo)); |
| 3185 | printf_filtered ("%-8s ", |
| 3186 | prismember (&pip -> trace, signo) |
| 3187 | ? "on" : "off"); |
| 3188 | printf_filtered ("%-8s ", |
| 3189 | prismember (&pip -> prstatus.pr_sighold, signo) |
| 3190 | ? "on" : "off"); |
| 3191 | |
| 3192 | #ifdef PROCFS_SIGPEND_OFFSET |
| 3193 | /* Alpha OSF/1 numbers the pending signals from 1. */ |
| 3194 | printf_filtered ("%-8s ", |
| 3195 | (signo ? prismember (&pip -> prstatus.pr_sigpend, |
| 3196 | signo - 1) |
| 3197 | : 0) |
| 3198 | ? "yes" : "no"); |
| 3199 | #else |
| 3200 | printf_filtered ("%-8s ", |
| 3201 | prismember (&pip -> prstatus.pr_sigpend, signo) |
| 3202 | ? "yes" : "no"); |
| 3203 | #endif |
| 3204 | printf_filtered (" %s\n", safe_strsignal (signo)); |
| 3205 | } |
| 3206 | printf_filtered ("\n"); |
| 3207 | } |
| 3208 | } |
| 3209 | |
| 3210 | static void |
| 3211 | info_proc_faults (pip, summary) |
| 3212 | struct procinfo *pip; |
| 3213 | int summary; |
| 3214 | { |
| 3215 | struct trans *transp; |
| 3216 | |
| 3217 | if (!summary) |
| 3218 | { |
| 3219 | if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0) |
| 3220 | { |
| 3221 | print_sys_errmsg (pip -> pathname, errno); |
| 3222 | error ("PIOCGFAULT failed"); |
| 3223 | } |
| 3224 | |
| 3225 | printf_filtered ("Current traced hardware fault set:\n\n"); |
| 3226 | printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace"); |
| 3227 | |
| 3228 | for (transp = faults_table; transp -> name != NULL; transp++) |
| 3229 | { |
| 3230 | QUIT; |
| 3231 | printf_filtered ("\t%-12s ", transp -> name); |
| 3232 | printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value) |
| 3233 | ? "on" : "off"); |
| 3234 | printf_filtered ("\n"); |
| 3235 | } |
| 3236 | printf_filtered ("\n"); |
| 3237 | } |
| 3238 | } |
| 3239 | |
| 3240 | static void |
| 3241 | info_proc_mappings (pip, summary) |
| 3242 | struct procinfo *pip; |
| 3243 | int summary; |
| 3244 | { |
| 3245 | int nmap; |
| 3246 | struct prmap *prmaps; |
| 3247 | struct prmap *prmap; |
| 3248 | |
| 3249 | if (!summary) |
| 3250 | { |
| 3251 | printf_filtered ("Mapped address spaces:\n\n"); |
| 3252 | #ifdef BFD_HOST_64_BIT |
| 3253 | printf_filtered (" %18s %18s %10s %10s %7s\n", |
| 3254 | #else |
| 3255 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
| 3256 | #endif |
| 3257 | "Start Addr", |
| 3258 | " End Addr", |
| 3259 | " Size", |
| 3260 | " Offset", |
| 3261 | "Flags"); |
| 3262 | if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0) |
| 3263 | { |
| 3264 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 3265 | if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0) |
| 3266 | { |
| 3267 | for (prmap = prmaps; prmap -> pr_size; ++prmap) |
| 3268 | { |
| 3269 | #ifdef BFD_HOST_64_BIT |
| 3270 | printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n", |
| 3271 | #else |
| 3272 | printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n", |
| 3273 | #endif |
| 3274 | (unsigned long)prmap -> pr_vaddr, |
| 3275 | (unsigned long)prmap -> pr_vaddr |
| 3276 | + prmap -> pr_size - 1, |
| 3277 | prmap -> pr_size, |
| 3278 | prmap -> pr_off, |
| 3279 | mappingflags (prmap -> pr_mflags)); |
| 3280 | } |
| 3281 | } |
| 3282 | } |
| 3283 | printf_filtered ("\n"); |
| 3284 | } |
| 3285 | } |
| 3286 | |
| 3287 | /* |
| 3288 | |
| 3289 | LOCAL FUNCTION |
| 3290 | |
| 3291 | info_proc -- implement the "info proc" command |
| 3292 | |
| 3293 | SYNOPSIS |
| 3294 | |
| 3295 | void info_proc (char *args, int from_tty) |
| 3296 | |
| 3297 | DESCRIPTION |
| 3298 | |
| 3299 | Implement gdb's "info proc" command by using the /proc interface |
| 3300 | to print status information about any currently running process. |
| 3301 | |
| 3302 | Examples of the use of "info proc" are: |
| 3303 | |
| 3304 | info proc (prints summary info for current inferior) |
| 3305 | info proc 123 (prints summary info for process with pid 123) |
| 3306 | info proc mappings (prints address mappings) |
| 3307 | info proc times (prints process/children times) |
| 3308 | info proc id (prints pid, ppid, gid, sid, etc) |
| 3309 | FIXME: i proc id not implemented. |
| 3310 | info proc status (prints general process state info) |
| 3311 | FIXME: i proc status not implemented. |
| 3312 | info proc signals (prints info about signal handling) |
| 3313 | info proc all (prints all info) |
| 3314 | |
| 3315 | */ |
| 3316 | |
| 3317 | static void |
| 3318 | info_proc (args, from_tty) |
| 3319 | char *args; |
| 3320 | int from_tty; |
| 3321 | { |
| 3322 | int pid; |
| 3323 | struct procinfo *pip; |
| 3324 | struct cleanup *old_chain; |
| 3325 | char **argv; |
| 3326 | int argsize; |
| 3327 | int summary = 1; |
| 3328 | int flags = 0; |
| 3329 | int syscalls = 0; |
| 3330 | int signals = 0; |
| 3331 | int faults = 0; |
| 3332 | int mappings = 0; |
| 3333 | int times = 0; |
| 3334 | int id = 0; |
| 3335 | int status = 0; |
| 3336 | int all = 0; |
| 3337 | |
| 3338 | old_chain = make_cleanup (null_cleanup, 0); |
| 3339 | |
| 3340 | /* Default to using the current inferior if no pid specified. Note |
| 3341 | that inferior_pid may be 0, hence we set okerr. */ |
| 3342 | |
| 3343 | pip = find_procinfo (inferior_pid, 1); |
| 3344 | |
| 3345 | if (args != NULL) |
| 3346 | { |
| 3347 | if ((argv = buildargv (args)) == NULL) |
| 3348 | { |
| 3349 | nomem (0); |
| 3350 | } |
| 3351 | make_cleanup (freeargv, (char *) argv); |
| 3352 | |
| 3353 | while (*argv != NULL) |
| 3354 | { |
| 3355 | argsize = strlen (*argv); |
| 3356 | if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0) |
| 3357 | { |
| 3358 | summary = 0; |
| 3359 | all = 1; |
| 3360 | } |
| 3361 | else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0) |
| 3362 | { |
| 3363 | summary = 0; |
| 3364 | faults = 1; |
| 3365 | } |
| 3366 | else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0) |
| 3367 | { |
| 3368 | summary = 0; |
| 3369 | flags = 1; |
| 3370 | } |
| 3371 | else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0) |
| 3372 | { |
| 3373 | summary = 0; |
| 3374 | id = 1; |
| 3375 | } |
| 3376 | else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0) |
| 3377 | { |
| 3378 | summary = 0; |
| 3379 | mappings = 1; |
| 3380 | } |
| 3381 | else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0) |
| 3382 | { |
| 3383 | summary = 0; |
| 3384 | signals = 1; |
| 3385 | } |
| 3386 | else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0) |
| 3387 | { |
| 3388 | summary = 0; |
| 3389 | status = 1; |
| 3390 | } |
| 3391 | else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0) |
| 3392 | { |
| 3393 | summary = 0; |
| 3394 | syscalls = 1; |
| 3395 | } |
| 3396 | else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0) |
| 3397 | { |
| 3398 | summary = 0; |
| 3399 | times = 1; |
| 3400 | } |
| 3401 | else if ((pid = atoi (*argv)) > 0) |
| 3402 | { |
| 3403 | pip = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
| 3404 | memset (pip, 0, sizeof (*pip)); |
| 3405 | |
| 3406 | pip->pid = pid; |
| 3407 | if (!open_proc_file (pid, pip, O_RDONLY)) |
| 3408 | { |
| 3409 | perror_with_name (pip -> pathname); |
| 3410 | /* NOTREACHED */ |
| 3411 | } |
| 3412 | make_cleanup (close_proc_file, pip); |
| 3413 | } |
| 3414 | else if (**argv != '\000') |
| 3415 | { |
| 3416 | error ("Unrecognized or ambiguous keyword `%s'.", *argv); |
| 3417 | } |
| 3418 | argv++; |
| 3419 | } |
| 3420 | } |
| 3421 | |
| 3422 | /* If we don't have a valid open process at this point, then we have no |
| 3423 | inferior or didn't specify a specific pid. */ |
| 3424 | |
| 3425 | if (!pip) |
| 3426 | { |
| 3427 | error ("\ |
| 3428 | No process. Start debugging a program or specify an explicit process ID."); |
| 3429 | } |
| 3430 | if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0) |
| 3431 | { |
| 3432 | print_sys_errmsg (pip -> pathname, errno); |
| 3433 | error ("PIOCSTATUS failed"); |
| 3434 | } |
| 3435 | |
| 3436 | /* Print verbose information of the requested type(s), or just a summary |
| 3437 | of the information for all types. */ |
| 3438 | |
| 3439 | printf_filtered ("\nInformation for %s:\n\n", pip -> pathname); |
| 3440 | if (summary || all || flags) |
| 3441 | { |
| 3442 | info_proc_flags (pip, summary); |
| 3443 | } |
| 3444 | if (summary || all) |
| 3445 | { |
| 3446 | info_proc_stop (pip, summary); |
| 3447 | } |
| 3448 | if (summary || all || signals || faults) |
| 3449 | { |
| 3450 | info_proc_siginfo (pip, summary); |
| 3451 | } |
| 3452 | if (summary || all || syscalls) |
| 3453 | { |
| 3454 | info_proc_syscalls (pip, summary); |
| 3455 | } |
| 3456 | if (summary || all || mappings) |
| 3457 | { |
| 3458 | info_proc_mappings (pip, summary); |
| 3459 | } |
| 3460 | if (summary || all || signals) |
| 3461 | { |
| 3462 | info_proc_signals (pip, summary); |
| 3463 | } |
| 3464 | if (summary || all || faults) |
| 3465 | { |
| 3466 | info_proc_faults (pip, summary); |
| 3467 | } |
| 3468 | printf_filtered ("\n"); |
| 3469 | |
| 3470 | /* All done, deal with closing any temporary process info structure, |
| 3471 | freeing temporary memory , etc. */ |
| 3472 | |
| 3473 | do_cleanups (old_chain); |
| 3474 | } |
| 3475 | |
| 3476 | /* |
| 3477 | |
| 3478 | LOCAL FUNCTION |
| 3479 | |
| 3480 | procfs_set_sproc_trap -- arrange for child to stop on sproc(). |
| 3481 | |
| 3482 | SYNOPSIS |
| 3483 | |
| 3484 | void procfs_set_sproc_trap (struct procinfo *) |
| 3485 | |
| 3486 | DESCRIPTION |
| 3487 | |
| 3488 | This function sets up a trap on sproc system call exits so that we can |
| 3489 | detect the arrival of a new thread. We are called with the new thread |
| 3490 | stopped prior to it's first instruction. |
| 3491 | |
| 3492 | Also note that we turn on the inherit-on-fork flag in the child process |
| 3493 | so that any grand-children start with all tracing flags set. |
| 3494 | */ |
| 3495 | |
| 3496 | #ifdef SYS_sproc |
| 3497 | |
| 3498 | static void |
| 3499 | procfs_set_sproc_trap (pi) |
| 3500 | struct procinfo *pi; |
| 3501 | { |
| 3502 | sysset_t exitset; |
| 3503 | |
| 3504 | if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0) |
| 3505 | { |
| 3506 | print_sys_errmsg (pi->pathname, errno); |
| 3507 | error ("PIOCGEXIT failed"); |
| 3508 | } |
| 3509 | |
| 3510 | praddset (&exitset, SYS_sproc); |
| 3511 | |
| 3512 | /* We trap on fork() and vfork() in order to disable debugging in our grand- |
| 3513 | children and descendant processes. At this time, GDB can only handle |
| 3514 | threads (multiple processes, one address space). forks (and execs) result |
| 3515 | in the creation of multiple address spaces, which GDB can't handle yet. */ |
| 3516 | |
| 3517 | praddset (&exitset, SYS_fork); |
| 3518 | #ifdef SYS_vfork |
| 3519 | praddset (&exitset, SYS_vfork); |
| 3520 | #endif |
| 3521 | |
| 3522 | if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0) |
| 3523 | { |
| 3524 | print_sys_errmsg (pi->pathname, errno); |
| 3525 | error ("PIOCSEXIT failed"); |
| 3526 | } |
| 3527 | |
| 3528 | /* Turn on inherit-on-fork flag so that all grand-children of gdb start with |
| 3529 | tracing flags set. */ |
| 3530 | |
| 3531 | #ifdef PIOCSET /* New method */ |
| 3532 | { |
| 3533 | long pr_flags; |
| 3534 | pr_flags = PR_FORK; |
| 3535 | ioctl (pi->fd, PIOCSET, &pr_flags); |
| 3536 | } |
| 3537 | #else |
| 3538 | #ifdef PIOCSFORK /* Original method */ |
| 3539 | ioctl (pi->fd, PIOCSFORK, NULL); |
| 3540 | #endif |
| 3541 | #endif |
| 3542 | } |
| 3543 | #endif /* SYS_sproc */ |
| 3544 | |
| 3545 | /* Fork an inferior process, and start debugging it with /proc. */ |
| 3546 | |
| 3547 | static void |
| 3548 | procfs_create_inferior (exec_file, allargs, env) |
| 3549 | char *exec_file; |
| 3550 | char *allargs; |
| 3551 | char **env; |
| 3552 | { |
| 3553 | char *shell_file = getenv ("SHELL"); |
| 3554 | char *tryname; |
| 3555 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
| 3556 | { |
| 3557 | |
| 3558 | /* We will be looking down the PATH to find shell_file. If we |
| 3559 | just do this the normal way (via execlp, which operates by |
| 3560 | attempting an exec for each element of the PATH until it |
| 3561 | finds one which succeeds), then there will be an exec for |
| 3562 | each failed attempt, each of which will cause a PR_SYSEXIT |
| 3563 | stop, and we won't know how to distinguish the PR_SYSEXIT's |
| 3564 | for these failed execs with the ones for successful execs |
| 3565 | (whether the exec has succeeded is stored at that time in the |
| 3566 | carry bit or some such architecture-specific and |
| 3567 | non-ABI-specified place). |
| 3568 | |
| 3569 | So I can't think of anything better than to search the PATH |
| 3570 | now. This has several disadvantages: (1) There is a race |
| 3571 | condition; if we find a file now and it is deleted before we |
| 3572 | exec it, we lose, even if the deletion leaves a valid file |
| 3573 | further down in the PATH, (2) there is no way to know exactly |
| 3574 | what an executable (in the sense of "capable of being |
| 3575 | exec'd") file is. Using access() loses because it may lose |
| 3576 | if the caller is the superuser; failing to use it loses if |
| 3577 | there are ACLs or some such. */ |
| 3578 | |
| 3579 | char *p; |
| 3580 | char *p1; |
| 3581 | /* FIXME-maybe: might want "set path" command so user can change what |
| 3582 | path is used from within GDB. */ |
| 3583 | char *path = getenv ("PATH"); |
| 3584 | int len; |
| 3585 | struct stat statbuf; |
| 3586 | |
| 3587 | if (path == NULL) |
| 3588 | path = "/bin:/usr/bin"; |
| 3589 | |
| 3590 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); |
| 3591 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
| 3592 | { |
| 3593 | p1 = strchr (p, ':'); |
| 3594 | if (p1 != NULL) |
| 3595 | len = p1 - p; |
| 3596 | else |
| 3597 | len = strlen (p); |
| 3598 | strncpy (tryname, p, len); |
| 3599 | tryname[len] = '\0'; |
| 3600 | strcat (tryname, "/"); |
| 3601 | strcat (tryname, shell_file); |
| 3602 | if (access (tryname, X_OK) < 0) |
| 3603 | continue; |
| 3604 | if (stat (tryname, &statbuf) < 0) |
| 3605 | continue; |
| 3606 | if (!S_ISREG (statbuf.st_mode)) |
| 3607 | /* We certainly need to reject directories. I'm not quite |
| 3608 | as sure about FIFOs, sockets, etc., but I kind of doubt |
| 3609 | that people want to exec() these things. */ |
| 3610 | continue; |
| 3611 | break; |
| 3612 | } |
| 3613 | if (p == NULL) |
| 3614 | /* Not found. This must be an error rather than merely passing |
| 3615 | the file to execlp(), because execlp() would try all the |
| 3616 | exec()s, causing GDB to get confused. */ |
| 3617 | error ("Can't find shell %s in PATH", shell_file); |
| 3618 | |
| 3619 | shell_file = tryname; |
| 3620 | } |
| 3621 | |
| 3622 | fork_inferior (exec_file, allargs, env, |
| 3623 | proc_set_exec_trap, procfs_init_inferior, shell_file); |
| 3624 | |
| 3625 | /* We are at the first instruction we care about. */ |
| 3626 | /* Pedal to the metal... */ |
| 3627 | |
| 3628 | /* Setup traps on exit from sproc() */ |
| 3629 | |
| 3630 | #ifdef SYS_sproc |
| 3631 | procfs_set_sproc_trap (current_procinfo); |
| 3632 | #endif |
| 3633 | |
| 3634 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
| 3635 | } |
| 3636 | |
| 3637 | /* Clean up after the inferior dies. */ |
| 3638 | |
| 3639 | static void |
| 3640 | procfs_mourn_inferior () |
| 3641 | { |
| 3642 | struct procinfo *pi; |
| 3643 | struct procinfo *next_pi; |
| 3644 | |
| 3645 | for (pi = procinfo_list; pi; pi = next_pi) |
| 3646 | { |
| 3647 | next_pi = pi->next; |
| 3648 | unconditionally_kill_inferior (pi); |
| 3649 | } |
| 3650 | |
| 3651 | unpush_target (&procfs_ops); |
| 3652 | generic_mourn_inferior (); |
| 3653 | } |
| 3654 | |
| 3655 | |
| 3656 | /* Mark our target-struct as eligible for stray "run" and "attach" commands. */ |
| 3657 | static int |
| 3658 | procfs_can_run () |
| 3659 | { |
| 3660 | return(1); |
| 3661 | } |
| 3662 | #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS |
| 3663 | \f |
| 3664 | /* Insert a watchpoint */ |
| 3665 | int |
| 3666 | procfs_set_watchpoint(pid, addr, len, rw) |
| 3667 | int pid; |
| 3668 | CORE_ADDR addr; |
| 3669 | int len; |
| 3670 | int rw; |
| 3671 | { |
| 3672 | struct procinfo *pi; |
| 3673 | prwatch_t wpt; |
| 3674 | |
| 3675 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); |
| 3676 | wpt.pr_vaddr = (caddr_t)addr; |
| 3677 | wpt.pr_size = len; |
| 3678 | wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0); |
| 3679 | if (ioctl (pi->fd, PIOCSWATCH, &wpt) < 0) |
| 3680 | { |
| 3681 | if (errno == E2BIG) |
| 3682 | return -1; |
| 3683 | /* Currently it sometimes happens that the same watchpoint gets |
| 3684 | deleted twice - don't die in this case (FIXME please) */ |
| 3685 | if (errno == ESRCH && len == 0) |
| 3686 | return 0; |
| 3687 | print_sys_errmsg (pi->pathname, errno); |
| 3688 | error ("PIOCSWATCH failed"); |
| 3689 | } |
| 3690 | return 0; |
| 3691 | } |
| 3692 | |
| 3693 | int |
| 3694 | procfs_stopped_by_watchpoint(pid) |
| 3695 | int pid; |
| 3696 | { |
| 3697 | struct procinfo *pi; |
| 3698 | short what; |
| 3699 | short why; |
| 3700 | |
| 3701 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); |
| 3702 | if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 3703 | { |
| 3704 | why = pi->prstatus.pr_why; |
| 3705 | what = pi->prstatus.pr_what; |
| 3706 | if (why == PR_FAULTED |
| 3707 | #if defined (FLTWATCH) && defined (FLTKWATCH) |
| 3708 | && (what == FLTWATCH) || (what == FLTKWATCH) |
| 3709 | #else |
| 3710 | #ifdef FLTWATCH |
| 3711 | && (what == FLTWATCH) |
| 3712 | #endif |
| 3713 | #ifdef FLTKWATCH |
| 3714 | && (what == FLTKWATCH) |
| 3715 | #endif |
| 3716 | #endif |
| 3717 | ) |
| 3718 | return what; |
| 3719 | } |
| 3720 | return 0; |
| 3721 | } |
| 3722 | #endif |
| 3723 | |
| 3724 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 3725 | ^C on the controlling terminal. |
| 3726 | |
| 3727 | XXX - This may not be correct for all systems. Some may want to use |
| 3728 | killpg() instead of kill (-pgrp). */ |
| 3729 | |
| 3730 | void |
| 3731 | procfs_stop () |
| 3732 | { |
| 3733 | extern pid_t inferior_process_group; |
| 3734 | |
| 3735 | kill (-inferior_process_group, SIGINT); |
| 3736 | } |
| 3737 | |
| 3738 | \f |
| 3739 | struct target_ops procfs_ops = { |
| 3740 | "procfs", /* to_shortname */ |
| 3741 | "Unix /proc child process", /* to_longname */ |
| 3742 | "Unix /proc child process (started by the \"run\" command).", /* to_doc */ |
| 3743 | procfs_open, /* to_open */ |
| 3744 | 0, /* to_close */ |
| 3745 | procfs_attach, /* to_attach */ |
| 3746 | procfs_detach, /* to_detach */ |
| 3747 | procfs_resume, /* to_resume */ |
| 3748 | procfs_wait, /* to_wait */ |
| 3749 | procfs_fetch_registers, /* to_fetch_registers */ |
| 3750 | procfs_store_registers, /* to_store_registers */ |
| 3751 | procfs_prepare_to_store, /* to_prepare_to_store */ |
| 3752 | procfs_xfer_memory, /* to_xfer_memory */ |
| 3753 | procfs_files_info, /* to_files_info */ |
| 3754 | memory_insert_breakpoint, /* to_insert_breakpoint */ |
| 3755 | memory_remove_breakpoint, /* to_remove_breakpoint */ |
| 3756 | terminal_init_inferior, /* to_terminal_init */ |
| 3757 | terminal_inferior, /* to_terminal_inferior */ |
| 3758 | terminal_ours_for_output, /* to_terminal_ours_for_output */ |
| 3759 | terminal_ours, /* to_terminal_ours */ |
| 3760 | child_terminal_info, /* to_terminal_info */ |
| 3761 | procfs_kill_inferior, /* to_kill */ |
| 3762 | 0, /* to_load */ |
| 3763 | 0, /* to_lookup_symbol */ |
| 3764 | procfs_create_inferior, /* to_create_inferior */ |
| 3765 | procfs_mourn_inferior, /* to_mourn_inferior */ |
| 3766 | procfs_can_run, /* to_can_run */ |
| 3767 | procfs_notice_signals, /* to_notice_signals */ |
| 3768 | 0 /* to_thread_alive */ |
| 3769 | procfs_stop, /* to_stop */ |
| 3770 | process_stratum, /* to_stratum */ |
| 3771 | 0, /* to_next */ |
| 3772 | 1, /* to_has_all_memory */ |
| 3773 | 1, /* to_has_memory */ |
| 3774 | 1, /* to_has_stack */ |
| 3775 | 1, /* to_has_registers */ |
| 3776 | 1, /* to_has_execution */ |
| 3777 | 0, /* sections */ |
| 3778 | 0, /* sections_end */ |
| 3779 | OPS_MAGIC /* to_magic */ |
| 3780 | }; |
| 3781 | |
| 3782 | void |
| 3783 | _initialize_procfs () |
| 3784 | { |
| 3785 | #ifdef HAVE_OPTIONAL_PROC_FS |
| 3786 | char procname[32]; |
| 3787 | int fd; |
| 3788 | |
| 3789 | /* If we have an optional /proc filesystem (e.g. under OSF/1), |
| 3790 | don't add procfs support if we cannot access the running |
| 3791 | GDB via /proc. */ |
| 3792 | sprintf (procname, PROC_NAME_FMT, getpid ()); |
| 3793 | if ((fd = open (procname, O_RDONLY)) < 0) |
| 3794 | return; |
| 3795 | close (fd); |
| 3796 | #endif |
| 3797 | |
| 3798 | add_target (&procfs_ops); |
| 3799 | |
| 3800 | add_info ("proc", info_proc, |
| 3801 | "Show process status information using /proc entry.\n\ |
| 3802 | Specify process id or use current inferior by default.\n\ |
| 3803 | Specify keywords for detailed information; default is summary.\n\ |
| 3804 | Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\ |
| 3805 | `status', `syscalls', and `times'.\n\ |
| 3806 | Unambiguous abbreviations may be used."); |
| 3807 | |
| 3808 | init_syscall_table (); |
| 3809 | } |