| 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
| 2 | Copyright 1991, 1992-96, 1997 Free Software Foundation, Inc. |
| 3 | Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs |
| 4 | compatibility by Geoffrey Noer at Cygnus Solutions. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | |
| 23 | /* N O T E S |
| 24 | |
| 25 | For information on the details of using /proc consult section proc(4) |
| 26 | in the UNIX System V Release 4 System Administrator's Reference Manual. |
| 27 | |
| 28 | The general register and floating point register sets are manipulated |
| 29 | separately. This file makes the assumption that if FP0_REGNUM is |
| 30 | defined, then support for the floating point register set is desired, |
| 31 | regardless of whether or not the actual target has floating point hardware. |
| 32 | |
| 33 | */ |
| 34 | |
| 35 | |
| 36 | #include "defs.h" |
| 37 | |
| 38 | #include <sys/types.h> |
| 39 | #include <time.h> |
| 40 | #include <sys/fault.h> |
| 41 | #include <sys/syscall.h> |
| 42 | #include <sys/procfs.h> |
| 43 | #include <fcntl.h> |
| 44 | #include <errno.h> |
| 45 | #include "gdb_string.h" |
| 46 | #include <stropts.h> |
| 47 | #include <poll.h> |
| 48 | #include <unistd.h> |
| 49 | #include "gdb_stat.h" |
| 50 | |
| 51 | #include "inferior.h" |
| 52 | #include "target.h" |
| 53 | #include "command.h" |
| 54 | #include "gdbcore.h" |
| 55 | #include "gdbthread.h" |
| 56 | |
| 57 | /* the name of the proc status struct depends on the implementation */ |
| 58 | #ifdef HAVE_PSTATUS_T |
| 59 | typedef pstatus_t gdb_prstatus_t; |
| 60 | #else |
| 61 | typedef prstatus_t gdb_prstatus_t; |
| 62 | #endif |
| 63 | |
| 64 | #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */ |
| 65 | |
| 66 | /* proc name formats may vary depending on the proc implementation */ |
| 67 | #ifdef HAVE_MULTIPLE_PROC_FDS |
| 68 | # ifndef CTL_PROC_NAME_FMT |
| 69 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" |
| 70 | # define AS_PROC_NAME_FMT "/proc/%d/as" |
| 71 | # define MAP_PROC_NAME_FMT "/proc/%d/map" |
| 72 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" |
| 73 | # endif |
| 74 | #else /* HAVE_MULTIPLE_PROC_FDS */ |
| 75 | # ifndef CTL_PROC_NAME_FMT |
| 76 | # define CTL_PROC_NAME_FMT "/proc/%05d" |
| 77 | # define AS_PROC_NAME_FMT "/proc/%05d" |
| 78 | # define MAP_PROC_NAME_FMT "/proc/%05d" |
| 79 | # define STATUS_PROC_NAME_FMT "/proc/%05d" |
| 80 | # endif |
| 81 | #endif /* HAVE_MULTIPLE_PROC_FDS */ |
| 82 | |
| 83 | #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status") |
| 84 | |
| 85 | extern struct target_ops procfs_ops; /* Forward declaration */ |
| 86 | |
| 87 | int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to |
| 88 | be a runnable target. Used by targets |
| 89 | that can sit atop procfs, such as solaris |
| 90 | thread support. */ |
| 91 | |
| 92 | #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */ |
| 93 | CORE_ADDR kernel_u_addr; |
| 94 | #endif |
| 95 | |
| 96 | #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */ |
| 97 | #undef si_pid |
| 98 | #define si_pid _data._proc.pid |
| 99 | #undef si_uid |
| 100 | #define si_uid _data._proc._pdata._kill.uid |
| 101 | #endif /* BROKEN_SIGINFO_H */ |
| 102 | |
| 103 | /* Define structures for passing commands to /proc/pid/ctl file. Note that |
| 104 | while we create these for the PROCFS_USE_READ_WRITE world, we use them |
| 105 | and ignore the extra cmd int in other proc schemes. |
| 106 | */ |
| 107 | /* generic ctl msg */ |
| 108 | struct proc_ctl { |
| 109 | int cmd; |
| 110 | long data; |
| 111 | }; |
| 112 | |
| 113 | /* set general registers */ |
| 114 | struct greg_ctl { |
| 115 | int cmd; |
| 116 | gregset_t gregset; |
| 117 | }; |
| 118 | |
| 119 | /* set fp registers */ |
| 120 | struct fpreg_ctl { |
| 121 | int cmd; |
| 122 | fpregset_t fpregset; |
| 123 | }; |
| 124 | |
| 125 | /* set signals to be traced */ |
| 126 | struct sig_ctl { |
| 127 | int cmd; |
| 128 | sigset_t sigset; |
| 129 | }; |
| 130 | |
| 131 | /* set faults to be traced */ |
| 132 | struct flt_ctl { |
| 133 | int cmd; |
| 134 | fltset_t fltset; |
| 135 | }; |
| 136 | |
| 137 | /* set system calls to be traced */ |
| 138 | struct sys_ctl { |
| 139 | int cmd; |
| 140 | sysset_t sysset; |
| 141 | }; |
| 142 | |
| 143 | /* set current signal to be traced */ |
| 144 | struct sigi_ctl { |
| 145 | int cmd; |
| 146 | siginfo_t siginfo; |
| 147 | }; |
| 148 | |
| 149 | /* All access to the inferior, either one started by gdb or one that has |
| 150 | been attached to, is controlled by an instance of a procinfo structure, |
| 151 | defined below. Since gdb currently only handles one inferior at a time, |
| 152 | the procinfo structure for the inferior is statically allocated and |
| 153 | only one exists at any given time. There is a separate procinfo |
| 154 | structure for use by the "info proc" command, so that we can print |
| 155 | useful information about any random process without interfering with |
| 156 | the inferior's procinfo information. */ |
| 157 | |
| 158 | struct procinfo { |
| 159 | struct procinfo *next; |
| 160 | int pid; /* Process ID of inferior */ |
| 161 | int ctl_fd; /* File descriptor for /proc ctl file */ |
| 162 | int status_fd; /* File descriptor for /proc status file */ |
| 163 | int as_fd; /* File descriptor for /proc as file */ |
| 164 | int map_fd; /* File descriptor for /proc map file */ |
| 165 | char *pathname; /* Pathname to /proc entry */ |
| 166 | int had_event; /* poll/select says something happened */ |
| 167 | int was_stopped; /* Nonzero if was stopped prior to attach */ |
| 168 | int nopass_next_sigstop; /* Don't pass a sigstop on next resume */ |
| 169 | #ifndef HAVE_NO_PRRUN_T |
| 170 | prrun_t prrun; /* Control state when it is run */ |
| 171 | #endif |
| 172 | gdb_prstatus_t prstatus; /* Current process status info */ |
| 173 | struct greg_ctl gregset; /* General register set */ |
| 174 | struct fpreg_ctl fpregset; /* Floating point register set */ |
| 175 | struct flt_ctl fltset; /* Current traced hardware fault set */ |
| 176 | struct sig_ctl trace; /* Current traced signal set */ |
| 177 | struct sys_ctl exitset; /* Current traced system call exit set */ |
| 178 | struct sys_ctl entryset; /* Current traced system call entry set */ |
| 179 | struct sig_ctl saved_sighold; /* Saved held signal set */ |
| 180 | struct flt_ctl saved_fltset; /* Saved traced hardware fault set */ |
| 181 | struct sig_ctl saved_trace; /* Saved traced signal set */ |
| 182 | struct sys_ctl saved_exitset; /* Saved traced system call exit set */ |
| 183 | struct sys_ctl saved_entryset;/* Saved traced system call entry set */ |
| 184 | int num_syscall_handlers; /* Number of syscall trap handlers |
| 185 | currently installed */ |
| 186 | /* Pointer to list of syscall trap handlers */ |
| 187 | struct procfs_syscall_handler *syscall_handlers; |
| 188 | int new_child; /* Non-zero if it's a new thread */ |
| 189 | }; |
| 190 | |
| 191 | /* List of inferior process information */ |
| 192 | static struct procinfo *procinfo_list = NULL; |
| 193 | static struct pollfd *poll_list; /* pollfds used for waiting on /proc */ |
| 194 | |
| 195 | static int num_poll_list = 0; /* Number of entries in poll_list */ |
| 196 | |
| 197 | /* Much of the information used in the /proc interface, particularly for |
| 198 | printing status information, is kept as tables of structures of the |
| 199 | following form. These tables can be used to map numeric values to |
| 200 | their symbolic names and to a string that describes their specific use. */ |
| 201 | |
| 202 | struct trans { |
| 203 | int value; /* The numeric value */ |
| 204 | char *name; /* The equivalent symbolic value */ |
| 205 | char *desc; /* Short description of value */ |
| 206 | }; |
| 207 | |
| 208 | /* Translate bits in the pr_flags member of the prstatus structure, into the |
| 209 | names and desc information. */ |
| 210 | |
| 211 | static struct trans pr_flag_table[] = |
| 212 | { |
| 213 | #if defined (PR_STOPPED) |
| 214 | { PR_STOPPED, "PR_STOPPED", "Process is stopped" }, |
| 215 | #endif |
| 216 | #if defined (PR_ISTOP) |
| 217 | { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" }, |
| 218 | #endif |
| 219 | #if defined (PR_DSTOP) |
| 220 | { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" }, |
| 221 | #endif |
| 222 | #if defined (PR_ASLEEP) |
| 223 | { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" }, |
| 224 | #endif |
| 225 | #if defined (PR_FORK) |
| 226 | { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" }, |
| 227 | #endif |
| 228 | #if defined (PR_RLC) |
| 229 | { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" }, |
| 230 | #endif |
| 231 | #if defined (PR_PTRACE) |
| 232 | { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" }, |
| 233 | #endif |
| 234 | #if defined (PR_PCINVAL) |
| 235 | { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" }, |
| 236 | #endif |
| 237 | #if defined (PR_ISSYS) |
| 238 | { PR_ISSYS, "PR_ISSYS", "Is a system process" }, |
| 239 | #endif |
| 240 | #if defined (PR_STEP) |
| 241 | { PR_STEP, "PR_STEP", "Process has single step pending" }, |
| 242 | #endif |
| 243 | #if defined (PR_KLC) |
| 244 | { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" }, |
| 245 | #endif |
| 246 | #if defined (PR_ASYNC) |
| 247 | { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" }, |
| 248 | #endif |
| 249 | #if defined (PR_PCOMPAT) |
| 250 | { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" }, |
| 251 | #endif |
| 252 | #if defined (PR_MSACCT) |
| 253 | { PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled" }, |
| 254 | #endif |
| 255 | #if defined (PR_BPTADJ) |
| 256 | { PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect" }, |
| 257 | #endif |
| 258 | #if defined (PR_ASLWP) |
| 259 | { PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP" }, |
| 260 | #endif |
| 261 | { 0, NULL, NULL } |
| 262 | }; |
| 263 | |
| 264 | /* Translate values in the pr_why field of the prstatus struct. */ |
| 265 | |
| 266 | static struct trans pr_why_table[] = |
| 267 | { |
| 268 | #if defined (PR_REQUESTED) |
| 269 | { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" }, |
| 270 | #endif |
| 271 | #if defined (PR_SIGNALLED) |
| 272 | { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" }, |
| 273 | #endif |
| 274 | #if defined (PR_SYSENTRY) |
| 275 | { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" }, |
| 276 | #endif |
| 277 | #if defined (PR_SYSEXIT) |
| 278 | { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" }, |
| 279 | #endif |
| 280 | #if defined (PR_JOBCONTROL) |
| 281 | { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" }, |
| 282 | #endif |
| 283 | #if defined (PR_FAULTED) |
| 284 | { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" }, |
| 285 | #endif |
| 286 | #if defined (PR_SUSPENDED) |
| 287 | { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" }, |
| 288 | #endif |
| 289 | #if defined (PR_CHECKPOINT) |
| 290 | { PR_CHECKPOINT, "PR_CHECKPOINT", "(???)" }, |
| 291 | #endif |
| 292 | { 0, NULL, NULL } |
| 293 | }; |
| 294 | |
| 295 | /* Hardware fault translation table. */ |
| 296 | |
| 297 | static struct trans faults_table[] = |
| 298 | { |
| 299 | #if defined (FLTILL) |
| 300 | { FLTILL, "FLTILL", "Illegal instruction" }, |
| 301 | #endif |
| 302 | #if defined (FLTPRIV) |
| 303 | { FLTPRIV, "FLTPRIV", "Privileged instruction" }, |
| 304 | #endif |
| 305 | #if defined (FLTBPT) |
| 306 | { FLTBPT, "FLTBPT", "Breakpoint trap" }, |
| 307 | #endif |
| 308 | #if defined (FLTTRACE) |
| 309 | { FLTTRACE, "FLTTRACE", "Trace trap" }, |
| 310 | #endif |
| 311 | #if defined (FLTACCESS) |
| 312 | { FLTACCESS, "FLTACCESS", "Memory access fault" }, |
| 313 | #endif |
| 314 | #if defined (FLTBOUNDS) |
| 315 | { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" }, |
| 316 | #endif |
| 317 | #if defined (FLTIOVF) |
| 318 | { FLTIOVF, "FLTIOVF", "Integer overflow" }, |
| 319 | #endif |
| 320 | #if defined (FLTIZDIV) |
| 321 | { FLTIZDIV, "FLTIZDIV", "Integer zero divide" }, |
| 322 | #endif |
| 323 | #if defined (FLTFPE) |
| 324 | { FLTFPE, "FLTFPE", "Floating-point exception" }, |
| 325 | #endif |
| 326 | #if defined (FLTSTACK) |
| 327 | { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" }, |
| 328 | #endif |
| 329 | #if defined (FLTPAGE) |
| 330 | { FLTPAGE, "FLTPAGE", "Recoverable page fault" }, |
| 331 | #endif |
| 332 | { 0, NULL, NULL } |
| 333 | }; |
| 334 | |
| 335 | /* Translation table for signal generation information. See UNIX System |
| 336 | V Release 4 Programmer's Reference Manual, siginfo(5). */ |
| 337 | |
| 338 | static struct sigcode { |
| 339 | int signo; |
| 340 | int code; |
| 341 | char *codename; |
| 342 | char *desc; |
| 343 | } siginfo_table[] = { |
| 344 | #if defined (SIGILL) && defined (ILL_ILLOPC) |
| 345 | { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" }, |
| 346 | #endif |
| 347 | #if defined (SIGILL) && defined (ILL_ILLOPN) |
| 348 | { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", }, |
| 349 | #endif |
| 350 | #if defined (SIGILL) && defined (ILL_ILLADR) |
| 351 | { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" }, |
| 352 | #endif |
| 353 | #if defined (SIGILL) && defined (ILL_ILLTRP) |
| 354 | { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" }, |
| 355 | #endif |
| 356 | #if defined (SIGILL) && defined (ILL_PRVOPC) |
| 357 | { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" }, |
| 358 | #endif |
| 359 | #if defined (SIGILL) && defined (ILL_PRVREG) |
| 360 | { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" }, |
| 361 | #endif |
| 362 | #if defined (SIGILL) && defined (ILL_COPROC) |
| 363 | { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" }, |
| 364 | #endif |
| 365 | #if defined (SIGILL) && defined (ILL_BADSTK) |
| 366 | { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" }, |
| 367 | #endif |
| 368 | #if defined (SIGFPE) && defined (FPE_INTDIV) |
| 369 | { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" }, |
| 370 | #endif |
| 371 | #if defined (SIGFPE) && defined (FPE_INTOVF) |
| 372 | { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" }, |
| 373 | #endif |
| 374 | #if defined (SIGFPE) && defined (FPE_FLTDIV) |
| 375 | { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" }, |
| 376 | #endif |
| 377 | #if defined (SIGFPE) && defined (FPE_FLTOVF) |
| 378 | { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" }, |
| 379 | #endif |
| 380 | #if defined (SIGFPE) && defined (FPE_FLTUND) |
| 381 | { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" }, |
| 382 | #endif |
| 383 | #if defined (SIGFPE) && defined (FPE_FLTRES) |
| 384 | { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" }, |
| 385 | #endif |
| 386 | #if defined (SIGFPE) && defined (FPE_FLTINV) |
| 387 | { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" }, |
| 388 | #endif |
| 389 | #if defined (SIGFPE) && defined (FPE_FLTSUB) |
| 390 | { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" }, |
| 391 | #endif |
| 392 | #if defined (SIGSEGV) && defined (SEGV_MAPERR) |
| 393 | { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" }, |
| 394 | #endif |
| 395 | #if defined (SIGSEGV) && defined (SEGV_ACCERR) |
| 396 | { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" }, |
| 397 | #endif |
| 398 | #if defined (SIGBUS) && defined (BUS_ADRALN) |
| 399 | { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" }, |
| 400 | #endif |
| 401 | #if defined (SIGBUS) && defined (BUS_ADRERR) |
| 402 | { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" }, |
| 403 | #endif |
| 404 | #if defined (SIGBUS) && defined (BUS_OBJERR) |
| 405 | { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" }, |
| 406 | #endif |
| 407 | #if defined (SIGTRAP) && defined (TRAP_BRKPT) |
| 408 | { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" }, |
| 409 | #endif |
| 410 | #if defined (SIGTRAP) && defined (TRAP_TRACE) |
| 411 | { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" }, |
| 412 | #endif |
| 413 | #if defined (SIGCLD) && defined (CLD_EXITED) |
| 414 | { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" }, |
| 415 | #endif |
| 416 | #if defined (SIGCLD) && defined (CLD_KILLED) |
| 417 | { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" }, |
| 418 | #endif |
| 419 | #if defined (SIGCLD) && defined (CLD_DUMPED) |
| 420 | { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" }, |
| 421 | #endif |
| 422 | #if defined (SIGCLD) && defined (CLD_TRAPPED) |
| 423 | { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" }, |
| 424 | #endif |
| 425 | #if defined (SIGCLD) && defined (CLD_STOPPED) |
| 426 | { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" }, |
| 427 | #endif |
| 428 | #if defined (SIGCLD) && defined (CLD_CONTINUED) |
| 429 | { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" }, |
| 430 | #endif |
| 431 | #if defined (SIGPOLL) && defined (POLL_IN) |
| 432 | { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" }, |
| 433 | #endif |
| 434 | #if defined (SIGPOLL) && defined (POLL_OUT) |
| 435 | { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" }, |
| 436 | #endif |
| 437 | #if defined (SIGPOLL) && defined (POLL_MSG) |
| 438 | { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" }, |
| 439 | #endif |
| 440 | #if defined (SIGPOLL) && defined (POLL_ERR) |
| 441 | { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" }, |
| 442 | #endif |
| 443 | #if defined (SIGPOLL) && defined (POLL_PRI) |
| 444 | { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" }, |
| 445 | #endif |
| 446 | #if defined (SIGPOLL) && defined (POLL_HUP) |
| 447 | { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" }, |
| 448 | #endif |
| 449 | { 0, 0, NULL, NULL } |
| 450 | }; |
| 451 | |
| 452 | static char *syscall_table[MAX_SYSCALLS]; |
| 453 | |
| 454 | /* Prototypes for local functions */ |
| 455 | |
| 456 | static void procfs_stop PARAMS ((void)); |
| 457 | |
| 458 | static int procfs_thread_alive PARAMS ((int)); |
| 459 | |
| 460 | static int procfs_can_run PARAMS ((void)); |
| 461 | |
| 462 | static void procfs_mourn_inferior PARAMS ((void)); |
| 463 | |
| 464 | static void procfs_fetch_registers PARAMS ((int)); |
| 465 | |
| 466 | static int procfs_wait PARAMS ((int, struct target_waitstatus *)); |
| 467 | |
| 468 | static void procfs_open PARAMS ((char *, int)); |
| 469 | |
| 470 | static void procfs_files_info PARAMS ((struct target_ops *)); |
| 471 | |
| 472 | static void procfs_prepare_to_store PARAMS ((void)); |
| 473 | |
| 474 | static void procfs_detach PARAMS ((char *, int)); |
| 475 | |
| 476 | static void procfs_attach PARAMS ((char *, int)); |
| 477 | |
| 478 | static void proc_set_exec_trap PARAMS ((void)); |
| 479 | |
| 480 | static int procfs_init_inferior PARAMS ((int)); |
| 481 | |
| 482 | static struct procinfo *create_procinfo PARAMS ((int)); |
| 483 | |
| 484 | static void procfs_store_registers PARAMS ((int)); |
| 485 | |
| 486 | static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *)); |
| 487 | |
| 488 | static void procfs_kill_inferior PARAMS ((void)); |
| 489 | |
| 490 | static char *sigcodedesc PARAMS ((siginfo_t *)); |
| 491 | |
| 492 | static char *sigcodename PARAMS ((siginfo_t *)); |
| 493 | |
| 494 | static struct procinfo *wait_fd PARAMS ((void)); |
| 495 | |
| 496 | static void remove_fd PARAMS ((struct procinfo *)); |
| 497 | |
| 498 | static void add_fd PARAMS ((struct procinfo *)); |
| 499 | |
| 500 | static void set_proc_siginfo PARAMS ((struct procinfo *, int)); |
| 501 | |
| 502 | static void init_syscall_table PARAMS ((void)); |
| 503 | |
| 504 | static char *syscallname PARAMS ((int)); |
| 505 | |
| 506 | static char *signalname PARAMS ((int)); |
| 507 | |
| 508 | static char *errnoname PARAMS ((int)); |
| 509 | |
| 510 | static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int)); |
| 511 | |
| 512 | static int open_proc_file PARAMS ((int, struct procinfo *, int, int)); |
| 513 | |
| 514 | static void close_proc_file PARAMS ((struct procinfo *)); |
| 515 | |
| 516 | static void unconditionally_kill_inferior PARAMS ((struct procinfo *)); |
| 517 | |
| 518 | static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN; |
| 519 | |
| 520 | static void info_proc PARAMS ((char *, int)); |
| 521 | |
| 522 | static void info_proc_flags PARAMS ((struct procinfo *, int)); |
| 523 | |
| 524 | static void info_proc_stop PARAMS ((struct procinfo *, int)); |
| 525 | |
| 526 | static void info_proc_siginfo PARAMS ((struct procinfo *, int)); |
| 527 | |
| 528 | static void info_proc_syscalls PARAMS ((struct procinfo *, int)); |
| 529 | |
| 530 | static void info_proc_mappings PARAMS ((struct procinfo *, int)); |
| 531 | |
| 532 | static void info_proc_signals PARAMS ((struct procinfo *, int)); |
| 533 | |
| 534 | static void info_proc_faults PARAMS ((struct procinfo *, int)); |
| 535 | |
| 536 | static char *mappingflags PARAMS ((long)); |
| 537 | |
| 538 | static char *lookupname PARAMS ((struct trans *, unsigned int, char *)); |
| 539 | |
| 540 | static char *lookupdesc PARAMS ((struct trans *, unsigned int)); |
| 541 | |
| 542 | static int do_attach PARAMS ((int pid)); |
| 543 | |
| 544 | static void do_detach PARAMS ((int siggnal)); |
| 545 | |
| 546 | static void procfs_create_inferior PARAMS ((char *, char *, char **)); |
| 547 | |
| 548 | static void procfs_notice_signals PARAMS ((int pid)); |
| 549 | |
| 550 | static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *)); |
| 551 | |
| 552 | static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail)); |
| 553 | |
| 554 | static int procfs_write_pcwstop PARAMS ((struct procinfo *)); |
| 555 | static int procfs_read_status PARAMS ((struct procinfo *)); |
| 556 | static void procfs_write_pckill PARAMS ((struct procinfo *)); |
| 557 | |
| 558 | typedef int syscall_func_t PARAMS ((struct procinfo *pi, int syscall_num, |
| 559 | int why, int *rtnval, int *statval)); |
| 560 | |
| 561 | static void procfs_set_syscall_trap PARAMS ((struct procinfo *pi, |
| 562 | int syscall_num, int flags, |
| 563 | syscall_func_t *func)); |
| 564 | |
| 565 | static void procfs_clear_syscall_trap PARAMS ((struct procinfo *pi, |
| 566 | int syscall_num, int errok)); |
| 567 | |
| 568 | #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */ |
| 569 | #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */ |
| 570 | |
| 571 | static syscall_func_t procfs_exit_handler; |
| 572 | |
| 573 | static syscall_func_t procfs_exec_handler; |
| 574 | |
| 575 | #ifdef SYS_sproc |
| 576 | static syscall_func_t procfs_sproc_handler; |
| 577 | static syscall_func_t procfs_fork_handler; |
| 578 | #endif |
| 579 | |
| 580 | #ifdef SYS_lwp_create |
| 581 | static syscall_func_t procfs_lwp_creation_handler; |
| 582 | #endif |
| 583 | |
| 584 | static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag)); |
| 585 | static void modify_run_on_last_close_flag PARAMS ((int fd, int flag)); |
| 586 | |
| 587 | /* */ |
| 588 | |
| 589 | struct procfs_syscall_handler |
| 590 | { |
| 591 | int syscall_num; /* The number of the system call being handled */ |
| 592 | /* The function to be called */ |
| 593 | syscall_func_t *func; |
| 594 | }; |
| 595 | |
| 596 | static void procfs_resume PARAMS ((int pid, int step, |
| 597 | enum target_signal signo)); |
| 598 | |
| 599 | /* External function prototypes that can't be easily included in any |
| 600 | header file because the args are typedefs in system include files. */ |
| 601 | |
| 602 | extern void supply_gregset PARAMS ((gregset_t *)); |
| 603 | |
| 604 | extern void fill_gregset PARAMS ((gregset_t *, int)); |
| 605 | |
| 606 | #ifdef FP0_REGNUM |
| 607 | extern void supply_fpregset PARAMS ((fpregset_t *)); |
| 608 | |
| 609 | extern void fill_fpregset PARAMS ((fpregset_t *, int)); |
| 610 | #endif |
| 611 | |
| 612 | /* |
| 613 | |
| 614 | LOCAL FUNCTION |
| 615 | |
| 616 | find_procinfo -- convert a process id to a struct procinfo |
| 617 | |
| 618 | SYNOPSIS |
| 619 | |
| 620 | static struct procinfo * find_procinfo (pid_t pid, int okfail); |
| 621 | |
| 622 | DESCRIPTION |
| 623 | |
| 624 | Given a process id, look it up in the procinfo chain. Returns |
| 625 | a struct procinfo *. If can't find pid, then call error(), |
| 626 | unless okfail is set, in which case, return NULL; |
| 627 | */ |
| 628 | |
| 629 | static struct procinfo * |
| 630 | find_procinfo (pid, okfail) |
| 631 | pid_t pid; |
| 632 | int okfail; |
| 633 | { |
| 634 | struct procinfo *procinfo; |
| 635 | |
| 636 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 637 | if (procinfo->pid == pid) |
| 638 | return procinfo; |
| 639 | |
| 640 | if (okfail) |
| 641 | return NULL; |
| 642 | |
| 643 | error ("procfs (find_procinfo): Couldn't locate pid %d", pid); |
| 644 | } |
| 645 | |
| 646 | /* |
| 647 | |
| 648 | LOCAL MACRO |
| 649 | |
| 650 | current_procinfo -- convert inferior_pid to a struct procinfo |
| 651 | |
| 652 | SYNOPSIS |
| 653 | |
| 654 | static struct procinfo * current_procinfo; |
| 655 | |
| 656 | DESCRIPTION |
| 657 | |
| 658 | Looks up inferior_pid in the procinfo chain. Always returns a |
| 659 | struct procinfo *. If process can't be found, we error() out. |
| 660 | */ |
| 661 | |
| 662 | #define current_procinfo find_procinfo (inferior_pid, 0) |
| 663 | |
| 664 | /* |
| 665 | |
| 666 | LOCAL FUNCTION |
| 667 | |
| 668 | add_fd -- Add the fd to the poll/select list |
| 669 | |
| 670 | SYNOPSIS |
| 671 | |
| 672 | static void add_fd (struct procinfo *); |
| 673 | |
| 674 | DESCRIPTION |
| 675 | |
| 676 | Add the fd of the supplied procinfo to the list of fds used for |
| 677 | poll/select operations. |
| 678 | */ |
| 679 | |
| 680 | static void |
| 681 | add_fd (pi) |
| 682 | struct procinfo *pi; |
| 683 | { |
| 684 | if (num_poll_list <= 0) |
| 685 | poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd)); |
| 686 | else |
| 687 | poll_list = (struct pollfd *) xrealloc (poll_list, |
| 688 | (num_poll_list + 1) |
| 689 | * sizeof (struct pollfd)); |
| 690 | poll_list[num_poll_list].fd = pi->ctl_fd; |
| 691 | #ifdef UNIXWARE |
| 692 | poll_list[num_poll_list].events = POLLWRNORM; |
| 693 | #else |
| 694 | poll_list[num_poll_list].events = POLLPRI; |
| 695 | #endif |
| 696 | |
| 697 | num_poll_list++; |
| 698 | } |
| 699 | |
| 700 | /* |
| 701 | |
| 702 | LOCAL FUNCTION |
| 703 | |
| 704 | remove_fd -- Remove the fd from the poll/select list |
| 705 | |
| 706 | SYNOPSIS |
| 707 | |
| 708 | static void remove_fd (struct procinfo *); |
| 709 | |
| 710 | DESCRIPTION |
| 711 | |
| 712 | Remove the fd of the supplied procinfo from the list of fds used |
| 713 | for poll/select operations. |
| 714 | */ |
| 715 | |
| 716 | static void |
| 717 | remove_fd (pi) |
| 718 | struct procinfo *pi; |
| 719 | { |
| 720 | int i; |
| 721 | |
| 722 | for (i = 0; i < num_poll_list; i++) |
| 723 | { |
| 724 | if (poll_list[i].fd == pi->ctl_fd) |
| 725 | { |
| 726 | if (i != num_poll_list - 1) |
| 727 | memcpy (poll_list + i, poll_list + i + 1, |
| 728 | (num_poll_list - i - 1) * sizeof (struct pollfd)); |
| 729 | |
| 730 | num_poll_list--; |
| 731 | |
| 732 | if (num_poll_list == 0) |
| 733 | free (poll_list); |
| 734 | else |
| 735 | poll_list = (struct pollfd *) xrealloc (poll_list, |
| 736 | num_poll_list |
| 737 | * sizeof (struct pollfd)); |
| 738 | return; |
| 739 | } |
| 740 | } |
| 741 | } |
| 742 | |
| 743 | /* |
| 744 | |
| 745 | LOCAL FUNCTION |
| 746 | |
| 747 | procfs_read_status - get procfs fd status |
| 748 | |
| 749 | SYNOPSIS |
| 750 | |
| 751 | static int procfs_read_status (pi) struct procinfo *pi; |
| 752 | |
| 753 | DESCRIPTION |
| 754 | |
| 755 | Given a pointer to a procinfo struct, get the status of |
| 756 | the status_fd in the appropriate way. Returns 0 on failure, |
| 757 | 1 on success. |
| 758 | */ |
| 759 | |
| 760 | static int |
| 761 | procfs_read_status (pi) |
| 762 | struct procinfo *pi; |
| 763 | { |
| 764 | #ifdef PROCFS_USE_READ_WRITE |
| 765 | if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) || |
| 766 | (read (pi->status_fd, (char *) &pi->prstatus, |
| 767 | sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t))) |
| 768 | #else |
| 769 | if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0) |
| 770 | #endif |
| 771 | return 0; |
| 772 | else |
| 773 | return 1; |
| 774 | } |
| 775 | |
| 776 | /* |
| 777 | |
| 778 | LOCAL FUNCTION |
| 779 | |
| 780 | procfs_write_pcwstop - send a PCWSTOP to procfs fd |
| 781 | |
| 782 | SYNOPSIS |
| 783 | |
| 784 | static int procfs_write_pcwstop (pi) struct procinfo *pi; |
| 785 | |
| 786 | DESCRIPTION |
| 787 | |
| 788 | Given a pointer to a procinfo struct, send a PCWSTOP to |
| 789 | the ctl_fd in the appropriate way. Returns 0 on failure, |
| 790 | 1 on success. |
| 791 | */ |
| 792 | |
| 793 | static int |
| 794 | procfs_write_pcwstop (pi) |
| 795 | struct procinfo *pi; |
| 796 | { |
| 797 | #ifdef PROCFS_USE_READ_WRITE |
| 798 | long cmd = PCWSTOP; |
| 799 | if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0) |
| 800 | #else |
| 801 | if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0) |
| 802 | #endif |
| 803 | return 0; |
| 804 | else |
| 805 | return 1; |
| 806 | } |
| 807 | |
| 808 | /* |
| 809 | |
| 810 | LOCAL FUNCTION |
| 811 | |
| 812 | procfs_write_pckill - send a kill to procfs fd |
| 813 | |
| 814 | SYNOPSIS |
| 815 | |
| 816 | static void procfs_write_pckill (pi) struct procinfo *pi; |
| 817 | |
| 818 | DESCRIPTION |
| 819 | |
| 820 | Given a pointer to a procinfo struct, send a kill to |
| 821 | the ctl_fd in the appropriate way. Returns 0 on failure, |
| 822 | 1 on success. |
| 823 | */ |
| 824 | |
| 825 | static void |
| 826 | procfs_write_pckill (pi) |
| 827 | struct procinfo *pi; |
| 828 | { |
| 829 | #ifdef PROCFS_USE_READ_WRITE |
| 830 | struct proc_ctl pctl; |
| 831 | pctl.cmd = PCKILL; |
| 832 | pctl.data = SIGKILL; |
| 833 | write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl)); |
| 834 | #else |
| 835 | int signo = SIGKILL; |
| 836 | ioctl (pi->ctl_fd, PIOCKILL, &signo); |
| 837 | #endif |
| 838 | } |
| 839 | |
| 840 | static struct procinfo * |
| 841 | wait_fd () |
| 842 | { |
| 843 | struct procinfo *pi, *next_pi; |
| 844 | #ifndef LOSING_POLL |
| 845 | int num_fds; |
| 846 | int i; |
| 847 | #endif |
| 848 | |
| 849 | set_sigint_trap (); /* Causes SIGINT to be passed on to the |
| 850 | attached process. */ |
| 851 | set_sigio_trap (); |
| 852 | |
| 853 | wait_again: |
| 854 | #ifndef LOSING_POLL |
| 855 | while (1) |
| 856 | { |
| 857 | num_fds = poll (poll_list, num_poll_list, -1); |
| 858 | if (num_fds > 0) |
| 859 | break; |
| 860 | if (num_fds < 0 && errno == EINTR) |
| 861 | continue; |
| 862 | print_sys_errmsg ("poll failed", errno); |
| 863 | error ("Poll failed, returned %d", num_fds); |
| 864 | } |
| 865 | #else /* LOSING_POLL */ |
| 866 | pi = current_procinfo; |
| 867 | |
| 868 | while (!procfs_write_pcwstop (pi)) |
| 869 | { |
| 870 | if (errno == ENOENT) |
| 871 | { |
| 872 | /* Process exited. */ |
| 873 | pi->prstatus.pr_flags = 0; |
| 874 | break; |
| 875 | } |
| 876 | else if (errno != EINTR) |
| 877 | { |
| 878 | print_sys_errmsg (pi->pathname, errno); |
| 879 | error ("procfs_write_pcwstop failed"); |
| 880 | } |
| 881 | } |
| 882 | pi->had_event = 1; |
| 883 | #endif /* LOSING_POLL */ |
| 884 | |
| 885 | clear_sigint_trap (); |
| 886 | clear_sigio_trap (); |
| 887 | |
| 888 | #ifndef LOSING_POLL |
| 889 | |
| 890 | for (i = 0; i < num_poll_list && num_fds > 0; i++) |
| 891 | { |
| 892 | if (0 == (poll_list[i].revents & |
| 893 | (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL))) |
| 894 | continue; |
| 895 | for (pi = procinfo_list; pi; pi = next_pi) |
| 896 | { |
| 897 | next_pi = pi->next; |
| 898 | if (poll_list[i].fd == pi->ctl_fd) |
| 899 | { |
| 900 | num_fds--; |
| 901 | if ((poll_list[i].revents & POLLHUP) != 0 || |
| 902 | !procfs_read_status(pi)) |
| 903 | { /* The LWP has apparently terminated. */ |
| 904 | if (info_verbose) |
| 905 | printf_filtered ("LWP %d exited.\n", |
| 906 | (pi->pid >> 16) & 0xffff); |
| 907 | close_proc_file (pi); |
| 908 | if (num_fds != 0) |
| 909 | continue; /* already another event to process */ |
| 910 | else |
| 911 | goto wait_again; /* wait for another event */ |
| 912 | } |
| 913 | pi->had_event = 1; |
| 914 | break; |
| 915 | } |
| 916 | } |
| 917 | if (!pi) |
| 918 | error ("wait_fd: Couldn't find procinfo for fd %d\n", |
| 919 | poll_list[i].fd); |
| 920 | } |
| 921 | #endif /* LOSING_POLL */ |
| 922 | |
| 923 | return pi; |
| 924 | } |
| 925 | |
| 926 | /* |
| 927 | |
| 928 | LOCAL FUNCTION |
| 929 | |
| 930 | lookupdesc -- translate a value to a summary desc string |
| 931 | |
| 932 | SYNOPSIS |
| 933 | |
| 934 | static char *lookupdesc (struct trans *transp, unsigned int val); |
| 935 | |
| 936 | DESCRIPTION |
| 937 | |
| 938 | Given a pointer to a translation table and a value to be translated, |
| 939 | lookup the desc string and return it. |
| 940 | */ |
| 941 | |
| 942 | static char * |
| 943 | lookupdesc (transp, val) |
| 944 | struct trans *transp; |
| 945 | unsigned int val; |
| 946 | { |
| 947 | char *desc; |
| 948 | |
| 949 | for (desc = NULL; transp -> name != NULL; transp++) |
| 950 | { |
| 951 | if (transp -> value == val) |
| 952 | { |
| 953 | desc = transp -> desc; |
| 954 | break; |
| 955 | } |
| 956 | } |
| 957 | |
| 958 | /* Didn't find a translation for the specified value, set a default one. */ |
| 959 | |
| 960 | if (desc == NULL) |
| 961 | { |
| 962 | desc = "Unknown"; |
| 963 | } |
| 964 | return (desc); |
| 965 | } |
| 966 | |
| 967 | /* |
| 968 | |
| 969 | LOCAL FUNCTION |
| 970 | |
| 971 | lookupname -- translate a value to symbolic name |
| 972 | |
| 973 | SYNOPSIS |
| 974 | |
| 975 | static char *lookupname (struct trans *transp, unsigned int val, |
| 976 | char *prefix); |
| 977 | |
| 978 | DESCRIPTION |
| 979 | |
| 980 | Given a pointer to a translation table, a value to be translated, |
| 981 | and a default prefix to return if the value can't be translated, |
| 982 | match the value with one of the translation table entries and |
| 983 | return a pointer to the symbolic name. |
| 984 | |
| 985 | If no match is found it just returns the value as a printable string, |
| 986 | with the given prefix. The previous such value, if any, is freed |
| 987 | at this time. |
| 988 | */ |
| 989 | |
| 990 | static char * |
| 991 | lookupname (transp, val, prefix) |
| 992 | struct trans *transp; |
| 993 | unsigned int val; |
| 994 | char *prefix; |
| 995 | { |
| 996 | static char *locbuf; |
| 997 | char *name; |
| 998 | |
| 999 | for (name = NULL; transp -> name != NULL; transp++) |
| 1000 | { |
| 1001 | if (transp -> value == val) |
| 1002 | { |
| 1003 | name = transp -> name; |
| 1004 | break; |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | /* Didn't find a translation for the specified value, build a default |
| 1009 | one using the specified prefix and return it. The lifetime of |
| 1010 | the value is only until the next one is needed. */ |
| 1011 | |
| 1012 | if (name == NULL) |
| 1013 | { |
| 1014 | if (locbuf != NULL) |
| 1015 | { |
| 1016 | free (locbuf); |
| 1017 | } |
| 1018 | locbuf = xmalloc (strlen (prefix) + 16); |
| 1019 | sprintf (locbuf, "%s %u", prefix, val); |
| 1020 | name = locbuf; |
| 1021 | } |
| 1022 | return (name); |
| 1023 | } |
| 1024 | |
| 1025 | static char * |
| 1026 | sigcodename (sip) |
| 1027 | siginfo_t *sip; |
| 1028 | { |
| 1029 | struct sigcode *scp; |
| 1030 | char *name = NULL; |
| 1031 | static char locbuf[32]; |
| 1032 | |
| 1033 | for (scp = siginfo_table; scp -> codename != NULL; scp++) |
| 1034 | { |
| 1035 | if ((scp -> signo == sip -> si_signo) && |
| 1036 | (scp -> code == sip -> si_code)) |
| 1037 | { |
| 1038 | name = scp -> codename; |
| 1039 | break; |
| 1040 | } |
| 1041 | } |
| 1042 | if (name == NULL) |
| 1043 | { |
| 1044 | sprintf (locbuf, "sigcode %u", sip -> si_signo); |
| 1045 | name = locbuf; |
| 1046 | } |
| 1047 | return (name); |
| 1048 | } |
| 1049 | |
| 1050 | static char * |
| 1051 | sigcodedesc (sip) |
| 1052 | siginfo_t *sip; |
| 1053 | { |
| 1054 | struct sigcode *scp; |
| 1055 | char *desc = NULL; |
| 1056 | |
| 1057 | for (scp = siginfo_table; scp -> codename != NULL; scp++) |
| 1058 | { |
| 1059 | if ((scp -> signo == sip -> si_signo) && |
| 1060 | (scp -> code == sip -> si_code)) |
| 1061 | { |
| 1062 | desc = scp -> desc; |
| 1063 | break; |
| 1064 | } |
| 1065 | } |
| 1066 | if (desc == NULL) |
| 1067 | { |
| 1068 | desc = "Unrecognized signal or trap use"; |
| 1069 | } |
| 1070 | return (desc); |
| 1071 | } |
| 1072 | |
| 1073 | /* |
| 1074 | |
| 1075 | LOCAL FUNCTION |
| 1076 | |
| 1077 | syscallname - translate a system call number into a system call name |
| 1078 | |
| 1079 | SYNOPSIS |
| 1080 | |
| 1081 | char *syscallname (int syscallnum) |
| 1082 | |
| 1083 | DESCRIPTION |
| 1084 | |
| 1085 | Given a system call number, translate it into the printable name |
| 1086 | of a system call, or into "syscall <num>" if it is an unknown |
| 1087 | number. |
| 1088 | */ |
| 1089 | |
| 1090 | static char * |
| 1091 | syscallname (syscallnum) |
| 1092 | int syscallnum; |
| 1093 | { |
| 1094 | static char locbuf[32]; |
| 1095 | |
| 1096 | if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS |
| 1097 | && syscall_table[syscallnum] != NULL) |
| 1098 | return syscall_table[syscallnum]; |
| 1099 | else |
| 1100 | { |
| 1101 | sprintf (locbuf, "syscall %u", syscallnum); |
| 1102 | return locbuf; |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | /* |
| 1107 | |
| 1108 | LOCAL FUNCTION |
| 1109 | |
| 1110 | init_syscall_table - initialize syscall translation table |
| 1111 | |
| 1112 | SYNOPSIS |
| 1113 | |
| 1114 | void init_syscall_table (void) |
| 1115 | |
| 1116 | DESCRIPTION |
| 1117 | |
| 1118 | Dynamically initialize the translation table to convert system |
| 1119 | call numbers into printable system call names. Done once per |
| 1120 | gdb run, on initialization. |
| 1121 | |
| 1122 | NOTES |
| 1123 | |
| 1124 | This is awfully ugly, but preprocessor tricks to make it prettier |
| 1125 | tend to be nonportable. |
| 1126 | */ |
| 1127 | |
| 1128 | static void |
| 1129 | init_syscall_table () |
| 1130 | { |
| 1131 | #if defined (SYS_exit) |
| 1132 | syscall_table[SYS_exit] = "exit"; |
| 1133 | #endif |
| 1134 | #if defined (SYS_fork) |
| 1135 | syscall_table[SYS_fork] = "fork"; |
| 1136 | #endif |
| 1137 | #if defined (SYS_read) |
| 1138 | syscall_table[SYS_read] = "read"; |
| 1139 | #endif |
| 1140 | #if defined (SYS_write) |
| 1141 | syscall_table[SYS_write] = "write"; |
| 1142 | #endif |
| 1143 | #if defined (SYS_open) |
| 1144 | syscall_table[SYS_open] = "open"; |
| 1145 | #endif |
| 1146 | #if defined (SYS_close) |
| 1147 | syscall_table[SYS_close] = "close"; |
| 1148 | #endif |
| 1149 | #if defined (SYS_wait) |
| 1150 | syscall_table[SYS_wait] = "wait"; |
| 1151 | #endif |
| 1152 | #if defined (SYS_creat) |
| 1153 | syscall_table[SYS_creat] = "creat"; |
| 1154 | #endif |
| 1155 | #if defined (SYS_link) |
| 1156 | syscall_table[SYS_link] = "link"; |
| 1157 | #endif |
| 1158 | #if defined (SYS_unlink) |
| 1159 | syscall_table[SYS_unlink] = "unlink"; |
| 1160 | #endif |
| 1161 | #if defined (SYS_exec) |
| 1162 | syscall_table[SYS_exec] = "exec"; |
| 1163 | #endif |
| 1164 | #if defined (SYS_execv) |
| 1165 | syscall_table[SYS_execv] = "execv"; |
| 1166 | #endif |
| 1167 | #if defined (SYS_execve) |
| 1168 | syscall_table[SYS_execve] = "execve"; |
| 1169 | #endif |
| 1170 | #if defined (SYS_chdir) |
| 1171 | syscall_table[SYS_chdir] = "chdir"; |
| 1172 | #endif |
| 1173 | #if defined (SYS_time) |
| 1174 | syscall_table[SYS_time] = "time"; |
| 1175 | #endif |
| 1176 | #if defined (SYS_mknod) |
| 1177 | syscall_table[SYS_mknod] = "mknod"; |
| 1178 | #endif |
| 1179 | #if defined (SYS_chmod) |
| 1180 | syscall_table[SYS_chmod] = "chmod"; |
| 1181 | #endif |
| 1182 | #if defined (SYS_chown) |
| 1183 | syscall_table[SYS_chown] = "chown"; |
| 1184 | #endif |
| 1185 | #if defined (SYS_brk) |
| 1186 | syscall_table[SYS_brk] = "brk"; |
| 1187 | #endif |
| 1188 | #if defined (SYS_stat) |
| 1189 | syscall_table[SYS_stat] = "stat"; |
| 1190 | #endif |
| 1191 | #if defined (SYS_lseek) |
| 1192 | syscall_table[SYS_lseek] = "lseek"; |
| 1193 | #endif |
| 1194 | #if defined (SYS_getpid) |
| 1195 | syscall_table[SYS_getpid] = "getpid"; |
| 1196 | #endif |
| 1197 | #if defined (SYS_mount) |
| 1198 | syscall_table[SYS_mount] = "mount"; |
| 1199 | #endif |
| 1200 | #if defined (SYS_umount) |
| 1201 | syscall_table[SYS_umount] = "umount"; |
| 1202 | #endif |
| 1203 | #if defined (SYS_setuid) |
| 1204 | syscall_table[SYS_setuid] = "setuid"; |
| 1205 | #endif |
| 1206 | #if defined (SYS_getuid) |
| 1207 | syscall_table[SYS_getuid] = "getuid"; |
| 1208 | #endif |
| 1209 | #if defined (SYS_stime) |
| 1210 | syscall_table[SYS_stime] = "stime"; |
| 1211 | #endif |
| 1212 | #if defined (SYS_ptrace) |
| 1213 | syscall_table[SYS_ptrace] = "ptrace"; |
| 1214 | #endif |
| 1215 | #if defined (SYS_alarm) |
| 1216 | syscall_table[SYS_alarm] = "alarm"; |
| 1217 | #endif |
| 1218 | #if defined (SYS_fstat) |
| 1219 | syscall_table[SYS_fstat] = "fstat"; |
| 1220 | #endif |
| 1221 | #if defined (SYS_pause) |
| 1222 | syscall_table[SYS_pause] = "pause"; |
| 1223 | #endif |
| 1224 | #if defined (SYS_utime) |
| 1225 | syscall_table[SYS_utime] = "utime"; |
| 1226 | #endif |
| 1227 | #if defined (SYS_stty) |
| 1228 | syscall_table[SYS_stty] = "stty"; |
| 1229 | #endif |
| 1230 | #if defined (SYS_gtty) |
| 1231 | syscall_table[SYS_gtty] = "gtty"; |
| 1232 | #endif |
| 1233 | #if defined (SYS_access) |
| 1234 | syscall_table[SYS_access] = "access"; |
| 1235 | #endif |
| 1236 | #if defined (SYS_nice) |
| 1237 | syscall_table[SYS_nice] = "nice"; |
| 1238 | #endif |
| 1239 | #if defined (SYS_statfs) |
| 1240 | syscall_table[SYS_statfs] = "statfs"; |
| 1241 | #endif |
| 1242 | #if defined (SYS_sync) |
| 1243 | syscall_table[SYS_sync] = "sync"; |
| 1244 | #endif |
| 1245 | #if defined (SYS_kill) |
| 1246 | syscall_table[SYS_kill] = "kill"; |
| 1247 | #endif |
| 1248 | #if defined (SYS_fstatfs) |
| 1249 | syscall_table[SYS_fstatfs] = "fstatfs"; |
| 1250 | #endif |
| 1251 | #if defined (SYS_pgrpsys) |
| 1252 | syscall_table[SYS_pgrpsys] = "pgrpsys"; |
| 1253 | #endif |
| 1254 | #if defined (SYS_xenix) |
| 1255 | syscall_table[SYS_xenix] = "xenix"; |
| 1256 | #endif |
| 1257 | #if defined (SYS_dup) |
| 1258 | syscall_table[SYS_dup] = "dup"; |
| 1259 | #endif |
| 1260 | #if defined (SYS_pipe) |
| 1261 | syscall_table[SYS_pipe] = "pipe"; |
| 1262 | #endif |
| 1263 | #if defined (SYS_times) |
| 1264 | syscall_table[SYS_times] = "times"; |
| 1265 | #endif |
| 1266 | #if defined (SYS_profil) |
| 1267 | syscall_table[SYS_profil] = "profil"; |
| 1268 | #endif |
| 1269 | #if defined (SYS_plock) |
| 1270 | syscall_table[SYS_plock] = "plock"; |
| 1271 | #endif |
| 1272 | #if defined (SYS_setgid) |
| 1273 | syscall_table[SYS_setgid] = "setgid"; |
| 1274 | #endif |
| 1275 | #if defined (SYS_getgid) |
| 1276 | syscall_table[SYS_getgid] = "getgid"; |
| 1277 | #endif |
| 1278 | #if defined (SYS_signal) |
| 1279 | syscall_table[SYS_signal] = "signal"; |
| 1280 | #endif |
| 1281 | #if defined (SYS_msgsys) |
| 1282 | syscall_table[SYS_msgsys] = "msgsys"; |
| 1283 | #endif |
| 1284 | #if defined (SYS_sys3b) |
| 1285 | syscall_table[SYS_sys3b] = "sys3b"; |
| 1286 | #endif |
| 1287 | #if defined (SYS_sysi86) |
| 1288 | syscall_table[SYS_sysi86] = "sysi86"; |
| 1289 | #endif |
| 1290 | #if defined (SYS_acct) |
| 1291 | syscall_table[SYS_acct] = "acct"; |
| 1292 | #endif |
| 1293 | #if defined (SYS_shmsys) |
| 1294 | syscall_table[SYS_shmsys] = "shmsys"; |
| 1295 | #endif |
| 1296 | #if defined (SYS_semsys) |
| 1297 | syscall_table[SYS_semsys] = "semsys"; |
| 1298 | #endif |
| 1299 | #if defined (SYS_ioctl) |
| 1300 | syscall_table[SYS_ioctl] = "ioctl"; |
| 1301 | #endif |
| 1302 | #if defined (SYS_uadmin) |
| 1303 | syscall_table[SYS_uadmin] = "uadmin"; |
| 1304 | #endif |
| 1305 | #if defined (SYS_utssys) |
| 1306 | syscall_table[SYS_utssys] = "utssys"; |
| 1307 | #endif |
| 1308 | #if defined (SYS_fsync) |
| 1309 | syscall_table[SYS_fsync] = "fsync"; |
| 1310 | #endif |
| 1311 | #if defined (SYS_umask) |
| 1312 | syscall_table[SYS_umask] = "umask"; |
| 1313 | #endif |
| 1314 | #if defined (SYS_chroot) |
| 1315 | syscall_table[SYS_chroot] = "chroot"; |
| 1316 | #endif |
| 1317 | #if defined (SYS_fcntl) |
| 1318 | syscall_table[SYS_fcntl] = "fcntl"; |
| 1319 | #endif |
| 1320 | #if defined (SYS_ulimit) |
| 1321 | syscall_table[SYS_ulimit] = "ulimit"; |
| 1322 | #endif |
| 1323 | #if defined (SYS_rfsys) |
| 1324 | syscall_table[SYS_rfsys] = "rfsys"; |
| 1325 | #endif |
| 1326 | #if defined (SYS_rmdir) |
| 1327 | syscall_table[SYS_rmdir] = "rmdir"; |
| 1328 | #endif |
| 1329 | #if defined (SYS_mkdir) |
| 1330 | syscall_table[SYS_mkdir] = "mkdir"; |
| 1331 | #endif |
| 1332 | #if defined (SYS_getdents) |
| 1333 | syscall_table[SYS_getdents] = "getdents"; |
| 1334 | #endif |
| 1335 | #if defined (SYS_sysfs) |
| 1336 | syscall_table[SYS_sysfs] = "sysfs"; |
| 1337 | #endif |
| 1338 | #if defined (SYS_getmsg) |
| 1339 | syscall_table[SYS_getmsg] = "getmsg"; |
| 1340 | #endif |
| 1341 | #if defined (SYS_putmsg) |
| 1342 | syscall_table[SYS_putmsg] = "putmsg"; |
| 1343 | #endif |
| 1344 | #if defined (SYS_poll) |
| 1345 | syscall_table[SYS_poll] = "poll"; |
| 1346 | #endif |
| 1347 | #if defined (SYS_lstat) |
| 1348 | syscall_table[SYS_lstat] = "lstat"; |
| 1349 | #endif |
| 1350 | #if defined (SYS_symlink) |
| 1351 | syscall_table[SYS_symlink] = "symlink"; |
| 1352 | #endif |
| 1353 | #if defined (SYS_readlink) |
| 1354 | syscall_table[SYS_readlink] = "readlink"; |
| 1355 | #endif |
| 1356 | #if defined (SYS_setgroups) |
| 1357 | syscall_table[SYS_setgroups] = "setgroups"; |
| 1358 | #endif |
| 1359 | #if defined (SYS_getgroups) |
| 1360 | syscall_table[SYS_getgroups] = "getgroups"; |
| 1361 | #endif |
| 1362 | #if defined (SYS_fchmod) |
| 1363 | syscall_table[SYS_fchmod] = "fchmod"; |
| 1364 | #endif |
| 1365 | #if defined (SYS_fchown) |
| 1366 | syscall_table[SYS_fchown] = "fchown"; |
| 1367 | #endif |
| 1368 | #if defined (SYS_sigprocmask) |
| 1369 | syscall_table[SYS_sigprocmask] = "sigprocmask"; |
| 1370 | #endif |
| 1371 | #if defined (SYS_sigsuspend) |
| 1372 | syscall_table[SYS_sigsuspend] = "sigsuspend"; |
| 1373 | #endif |
| 1374 | #if defined (SYS_sigaltstack) |
| 1375 | syscall_table[SYS_sigaltstack] = "sigaltstack"; |
| 1376 | #endif |
| 1377 | #if defined (SYS_sigaction) |
| 1378 | syscall_table[SYS_sigaction] = "sigaction"; |
| 1379 | #endif |
| 1380 | #if defined (SYS_sigpending) |
| 1381 | syscall_table[SYS_sigpending] = "sigpending"; |
| 1382 | #endif |
| 1383 | #if defined (SYS_context) |
| 1384 | syscall_table[SYS_context] = "context"; |
| 1385 | #endif |
| 1386 | #if defined (SYS_evsys) |
| 1387 | syscall_table[SYS_evsys] = "evsys"; |
| 1388 | #endif |
| 1389 | #if defined (SYS_evtrapret) |
| 1390 | syscall_table[SYS_evtrapret] = "evtrapret"; |
| 1391 | #endif |
| 1392 | #if defined (SYS_statvfs) |
| 1393 | syscall_table[SYS_statvfs] = "statvfs"; |
| 1394 | #endif |
| 1395 | #if defined (SYS_fstatvfs) |
| 1396 | syscall_table[SYS_fstatvfs] = "fstatvfs"; |
| 1397 | #endif |
| 1398 | #if defined (SYS_nfssys) |
| 1399 | syscall_table[SYS_nfssys] = "nfssys"; |
| 1400 | #endif |
| 1401 | #if defined (SYS_waitsys) |
| 1402 | syscall_table[SYS_waitsys] = "waitsys"; |
| 1403 | #endif |
| 1404 | #if defined (SYS_sigsendsys) |
| 1405 | syscall_table[SYS_sigsendsys] = "sigsendsys"; |
| 1406 | #endif |
| 1407 | #if defined (SYS_hrtsys) |
| 1408 | syscall_table[SYS_hrtsys] = "hrtsys"; |
| 1409 | #endif |
| 1410 | #if defined (SYS_acancel) |
| 1411 | syscall_table[SYS_acancel] = "acancel"; |
| 1412 | #endif |
| 1413 | #if defined (SYS_async) |
| 1414 | syscall_table[SYS_async] = "async"; |
| 1415 | #endif |
| 1416 | #if defined (SYS_priocntlsys) |
| 1417 | syscall_table[SYS_priocntlsys] = "priocntlsys"; |
| 1418 | #endif |
| 1419 | #if defined (SYS_pathconf) |
| 1420 | syscall_table[SYS_pathconf] = "pathconf"; |
| 1421 | #endif |
| 1422 | #if defined (SYS_mincore) |
| 1423 | syscall_table[SYS_mincore] = "mincore"; |
| 1424 | #endif |
| 1425 | #if defined (SYS_mmap) |
| 1426 | syscall_table[SYS_mmap] = "mmap"; |
| 1427 | #endif |
| 1428 | #if defined (SYS_mprotect) |
| 1429 | syscall_table[SYS_mprotect] = "mprotect"; |
| 1430 | #endif |
| 1431 | #if defined (SYS_munmap) |
| 1432 | syscall_table[SYS_munmap] = "munmap"; |
| 1433 | #endif |
| 1434 | #if defined (SYS_fpathconf) |
| 1435 | syscall_table[SYS_fpathconf] = "fpathconf"; |
| 1436 | #endif |
| 1437 | #if defined (SYS_vfork) |
| 1438 | syscall_table[SYS_vfork] = "vfork"; |
| 1439 | #endif |
| 1440 | #if defined (SYS_fchdir) |
| 1441 | syscall_table[SYS_fchdir] = "fchdir"; |
| 1442 | #endif |
| 1443 | #if defined (SYS_readv) |
| 1444 | syscall_table[SYS_readv] = "readv"; |
| 1445 | #endif |
| 1446 | #if defined (SYS_writev) |
| 1447 | syscall_table[SYS_writev] = "writev"; |
| 1448 | #endif |
| 1449 | #if defined (SYS_xstat) |
| 1450 | syscall_table[SYS_xstat] = "xstat"; |
| 1451 | #endif |
| 1452 | #if defined (SYS_lxstat) |
| 1453 | syscall_table[SYS_lxstat] = "lxstat"; |
| 1454 | #endif |
| 1455 | #if defined (SYS_fxstat) |
| 1456 | syscall_table[SYS_fxstat] = "fxstat"; |
| 1457 | #endif |
| 1458 | #if defined (SYS_xmknod) |
| 1459 | syscall_table[SYS_xmknod] = "xmknod"; |
| 1460 | #endif |
| 1461 | #if defined (SYS_clocal) |
| 1462 | syscall_table[SYS_clocal] = "clocal"; |
| 1463 | #endif |
| 1464 | #if defined (SYS_setrlimit) |
| 1465 | syscall_table[SYS_setrlimit] = "setrlimit"; |
| 1466 | #endif |
| 1467 | #if defined (SYS_getrlimit) |
| 1468 | syscall_table[SYS_getrlimit] = "getrlimit"; |
| 1469 | #endif |
| 1470 | #if defined (SYS_lchown) |
| 1471 | syscall_table[SYS_lchown] = "lchown"; |
| 1472 | #endif |
| 1473 | #if defined (SYS_memcntl) |
| 1474 | syscall_table[SYS_memcntl] = "memcntl"; |
| 1475 | #endif |
| 1476 | #if defined (SYS_getpmsg) |
| 1477 | syscall_table[SYS_getpmsg] = "getpmsg"; |
| 1478 | #endif |
| 1479 | #if defined (SYS_putpmsg) |
| 1480 | syscall_table[SYS_putpmsg] = "putpmsg"; |
| 1481 | #endif |
| 1482 | #if defined (SYS_rename) |
| 1483 | syscall_table[SYS_rename] = "rename"; |
| 1484 | #endif |
| 1485 | #if defined (SYS_uname) |
| 1486 | syscall_table[SYS_uname] = "uname"; |
| 1487 | #endif |
| 1488 | #if defined (SYS_setegid) |
| 1489 | syscall_table[SYS_setegid] = "setegid"; |
| 1490 | #endif |
| 1491 | #if defined (SYS_sysconfig) |
| 1492 | syscall_table[SYS_sysconfig] = "sysconfig"; |
| 1493 | #endif |
| 1494 | #if defined (SYS_adjtime) |
| 1495 | syscall_table[SYS_adjtime] = "adjtime"; |
| 1496 | #endif |
| 1497 | #if defined (SYS_systeminfo) |
| 1498 | syscall_table[SYS_systeminfo] = "systeminfo"; |
| 1499 | #endif |
| 1500 | #if defined (SYS_seteuid) |
| 1501 | syscall_table[SYS_seteuid] = "seteuid"; |
| 1502 | #endif |
| 1503 | #if defined (SYS_sproc) |
| 1504 | syscall_table[SYS_sproc] = "sproc"; |
| 1505 | #endif |
| 1506 | #if defined (SYS_keyctl) |
| 1507 | syscall_table[SYS_keyctl] = "keyctl"; |
| 1508 | #endif |
| 1509 | #if defined (SYS_secsys) |
| 1510 | syscall_table[SYS_secsys] = "secsys"; |
| 1511 | #endif |
| 1512 | #if defined (SYS_filepriv) |
| 1513 | syscall_table[SYS_filepriv] = "filepriv"; |
| 1514 | #endif |
| 1515 | #if defined (SYS_procpriv) |
| 1516 | syscall_table[SYS_procpriv] = "procpriv"; |
| 1517 | #endif |
| 1518 | #if defined (SYS_devstat) |
| 1519 | syscall_table[SYS_devstat] = "devstat"; |
| 1520 | #endif |
| 1521 | #if defined (SYS_aclipc) |
| 1522 | syscall_table[SYS_aclipc] = "aclipc"; |
| 1523 | #endif |
| 1524 | #if defined (SYS_fdevstat) |
| 1525 | syscall_table[SYS_fdevstat] = "fdevstat"; |
| 1526 | #endif |
| 1527 | #if defined (SYS_flvlfile) |
| 1528 | syscall_table[SYS_flvlfile] = "flvlfile"; |
| 1529 | #endif |
| 1530 | #if defined (SYS_lvlfile) |
| 1531 | syscall_table[SYS_lvlfile] = "lvlfile"; |
| 1532 | #endif |
| 1533 | #if defined (SYS_lvlequal) |
| 1534 | syscall_table[SYS_lvlequal] = "lvlequal"; |
| 1535 | #endif |
| 1536 | #if defined (SYS_lvlproc) |
| 1537 | syscall_table[SYS_lvlproc] = "lvlproc"; |
| 1538 | #endif |
| 1539 | #if defined (SYS_lvlipc) |
| 1540 | syscall_table[SYS_lvlipc] = "lvlipc"; |
| 1541 | #endif |
| 1542 | #if defined (SYS_acl) |
| 1543 | syscall_table[SYS_acl] = "acl"; |
| 1544 | #endif |
| 1545 | #if defined (SYS_auditevt) |
| 1546 | syscall_table[SYS_auditevt] = "auditevt"; |
| 1547 | #endif |
| 1548 | #if defined (SYS_auditctl) |
| 1549 | syscall_table[SYS_auditctl] = "auditctl"; |
| 1550 | #endif |
| 1551 | #if defined (SYS_auditdmp) |
| 1552 | syscall_table[SYS_auditdmp] = "auditdmp"; |
| 1553 | #endif |
| 1554 | #if defined (SYS_auditlog) |
| 1555 | syscall_table[SYS_auditlog] = "auditlog"; |
| 1556 | #endif |
| 1557 | #if defined (SYS_auditbuf) |
| 1558 | syscall_table[SYS_auditbuf] = "auditbuf"; |
| 1559 | #endif |
| 1560 | #if defined (SYS_lvldom) |
| 1561 | syscall_table[SYS_lvldom] = "lvldom"; |
| 1562 | #endif |
| 1563 | #if defined (SYS_lvlvfs) |
| 1564 | syscall_table[SYS_lvlvfs] = "lvlvfs"; |
| 1565 | #endif |
| 1566 | #if defined (SYS_mkmld) |
| 1567 | syscall_table[SYS_mkmld] = "mkmld"; |
| 1568 | #endif |
| 1569 | #if defined (SYS_mldmode) |
| 1570 | syscall_table[SYS_mldmode] = "mldmode"; |
| 1571 | #endif |
| 1572 | #if defined (SYS_secadvise) |
| 1573 | syscall_table[SYS_secadvise] = "secadvise"; |
| 1574 | #endif |
| 1575 | #if defined (SYS_online) |
| 1576 | syscall_table[SYS_online] = "online"; |
| 1577 | #endif |
| 1578 | #if defined (SYS_setitimer) |
| 1579 | syscall_table[SYS_setitimer] = "setitimer"; |
| 1580 | #endif |
| 1581 | #if defined (SYS_getitimer) |
| 1582 | syscall_table[SYS_getitimer] = "getitimer"; |
| 1583 | #endif |
| 1584 | #if defined (SYS_gettimeofday) |
| 1585 | syscall_table[SYS_gettimeofday] = "gettimeofday"; |
| 1586 | #endif |
| 1587 | #if defined (SYS_settimeofday) |
| 1588 | syscall_table[SYS_settimeofday] = "settimeofday"; |
| 1589 | #endif |
| 1590 | #if defined (SYS_lwp_create) |
| 1591 | syscall_table[SYS_lwp_create] = "_lwp_create"; |
| 1592 | #endif |
| 1593 | #if defined (SYS_lwp_exit) |
| 1594 | syscall_table[SYS_lwp_exit] = "_lwp_exit"; |
| 1595 | #endif |
| 1596 | #if defined (SYS_lwp_wait) |
| 1597 | syscall_table[SYS_lwp_wait] = "_lwp_wait"; |
| 1598 | #endif |
| 1599 | #if defined (SYS_lwp_self) |
| 1600 | syscall_table[SYS_lwp_self] = "_lwp_self"; |
| 1601 | #endif |
| 1602 | #if defined (SYS_lwp_info) |
| 1603 | syscall_table[SYS_lwp_info] = "_lwp_info"; |
| 1604 | #endif |
| 1605 | #if defined (SYS_lwp_private) |
| 1606 | syscall_table[SYS_lwp_private] = "_lwp_private"; |
| 1607 | #endif |
| 1608 | #if defined (SYS_processor_bind) |
| 1609 | syscall_table[SYS_processor_bind] = "processor_bind"; |
| 1610 | #endif |
| 1611 | #if defined (SYS_processor_exbind) |
| 1612 | syscall_table[SYS_processor_exbind] = "processor_exbind"; |
| 1613 | #endif |
| 1614 | #if defined (SYS_prepblock) |
| 1615 | syscall_table[SYS_prepblock] = "prepblock"; |
| 1616 | #endif |
| 1617 | #if defined (SYS_block) |
| 1618 | syscall_table[SYS_block] = "block"; |
| 1619 | #endif |
| 1620 | #if defined (SYS_rdblock) |
| 1621 | syscall_table[SYS_rdblock] = "rdblock"; |
| 1622 | #endif |
| 1623 | #if defined (SYS_unblock) |
| 1624 | syscall_table[SYS_unblock] = "unblock"; |
| 1625 | #endif |
| 1626 | #if defined (SYS_cancelblock) |
| 1627 | syscall_table[SYS_cancelblock] = "cancelblock"; |
| 1628 | #endif |
| 1629 | #if defined (SYS_pread) |
| 1630 | syscall_table[SYS_pread] = "pread"; |
| 1631 | #endif |
| 1632 | #if defined (SYS_pwrite) |
| 1633 | syscall_table[SYS_pwrite] = "pwrite"; |
| 1634 | #endif |
| 1635 | #if defined (SYS_truncate) |
| 1636 | syscall_table[SYS_truncate] = "truncate"; |
| 1637 | #endif |
| 1638 | #if defined (SYS_ftruncate) |
| 1639 | syscall_table[SYS_ftruncate] = "ftruncate"; |
| 1640 | #endif |
| 1641 | #if defined (SYS_lwp_kill) |
| 1642 | syscall_table[SYS_lwp_kill] = "_lwp_kill"; |
| 1643 | #endif |
| 1644 | #if defined (SYS_sigwait) |
| 1645 | syscall_table[SYS_sigwait] = "sigwait"; |
| 1646 | #endif |
| 1647 | #if defined (SYS_fork1) |
| 1648 | syscall_table[SYS_fork1] = "fork1"; |
| 1649 | #endif |
| 1650 | #if defined (SYS_forkall) |
| 1651 | syscall_table[SYS_forkall] = "forkall"; |
| 1652 | #endif |
| 1653 | #if defined (SYS_modload) |
| 1654 | syscall_table[SYS_modload] = "modload"; |
| 1655 | #endif |
| 1656 | #if defined (SYS_moduload) |
| 1657 | syscall_table[SYS_moduload] = "moduload"; |
| 1658 | #endif |
| 1659 | #if defined (SYS_modpath) |
| 1660 | syscall_table[SYS_modpath] = "modpath"; |
| 1661 | #endif |
| 1662 | #if defined (SYS_modstat) |
| 1663 | syscall_table[SYS_modstat] = "modstat"; |
| 1664 | #endif |
| 1665 | #if defined (SYS_modadm) |
| 1666 | syscall_table[SYS_modadm] = "modadm"; |
| 1667 | #endif |
| 1668 | #if defined (SYS_getksym) |
| 1669 | syscall_table[SYS_getksym] = "getksym"; |
| 1670 | #endif |
| 1671 | #if defined (SYS_lwp_suspend) |
| 1672 | syscall_table[SYS_lwp_suspend] = "_lwp_suspend"; |
| 1673 | #endif |
| 1674 | #if defined (SYS_lwp_continue) |
| 1675 | syscall_table[SYS_lwp_continue] = "_lwp_continue"; |
| 1676 | #endif |
| 1677 | #if defined (SYS_priocntllst) |
| 1678 | syscall_table[SYS_priocntllst] = "priocntllst"; |
| 1679 | #endif |
| 1680 | #if defined (SYS_sleep) |
| 1681 | syscall_table[SYS_sleep] = "sleep"; |
| 1682 | #endif |
| 1683 | #if defined (SYS_lwp_sema_wait) |
| 1684 | syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait"; |
| 1685 | #endif |
| 1686 | #if defined (SYS_lwp_sema_post) |
| 1687 | syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post"; |
| 1688 | #endif |
| 1689 | #if defined (SYS_lwp_sema_trywait) |
| 1690 | syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait"; |
| 1691 | #endif |
| 1692 | } |
| 1693 | |
| 1694 | /* |
| 1695 | |
| 1696 | LOCAL FUNCTION |
| 1697 | |
| 1698 | procfs_kill_inferior - kill any currently inferior |
| 1699 | |
| 1700 | SYNOPSIS |
| 1701 | |
| 1702 | void procfs_kill_inferior (void) |
| 1703 | |
| 1704 | DESCRIPTION |
| 1705 | |
| 1706 | Kill any current inferior. |
| 1707 | |
| 1708 | NOTES |
| 1709 | |
| 1710 | Kills even attached inferiors. Presumably the user has already |
| 1711 | been prompted that the inferior is an attached one rather than |
| 1712 | one started by gdb. (FIXME?) |
| 1713 | |
| 1714 | */ |
| 1715 | |
| 1716 | static void |
| 1717 | procfs_kill_inferior () |
| 1718 | { |
| 1719 | target_mourn_inferior (); |
| 1720 | } |
| 1721 | |
| 1722 | /* |
| 1723 | |
| 1724 | LOCAL FUNCTION |
| 1725 | |
| 1726 | unconditionally_kill_inferior - terminate the inferior |
| 1727 | |
| 1728 | SYNOPSIS |
| 1729 | |
| 1730 | static void unconditionally_kill_inferior (struct procinfo *) |
| 1731 | |
| 1732 | DESCRIPTION |
| 1733 | |
| 1734 | Kill the specified inferior. |
| 1735 | |
| 1736 | NOTE |
| 1737 | |
| 1738 | A possibly useful enhancement would be to first try sending |
| 1739 | the inferior a terminate signal, politely asking it to commit |
| 1740 | suicide, before we murder it (we could call that |
| 1741 | politely_kill_inferior()). |
| 1742 | |
| 1743 | */ |
| 1744 | |
| 1745 | static void |
| 1746 | unconditionally_kill_inferior (pi) |
| 1747 | struct procinfo *pi; |
| 1748 | { |
| 1749 | int ppid; |
| 1750 | struct proc_ctl pctl; |
| 1751 | |
| 1752 | ppid = pi->prstatus.pr_ppid; |
| 1753 | |
| 1754 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL |
| 1755 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal |
| 1756 | before the PIOCKILL, otherwise it might generate a corrupted core |
| 1757 | file for the inferior. */ |
| 1758 | ioctl (pi->ctl_fd, PIOCSSIG, NULL); |
| 1759 | #endif |
| 1760 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL |
| 1761 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal |
| 1762 | to kill the inferior, otherwise it might remain stopped with a |
| 1763 | pending SIGKILL. |
| 1764 | We do not check the result of the PIOCSSIG, the inferior might have |
| 1765 | died already. */ |
| 1766 | { |
| 1767 | struct siginfo newsiginfo; |
| 1768 | |
| 1769 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
| 1770 | newsiginfo.si_signo = SIGKILL; |
| 1771 | newsiginfo.si_code = 0; |
| 1772 | newsiginfo.si_errno = 0; |
| 1773 | newsiginfo.si_pid = getpid (); |
| 1774 | newsiginfo.si_uid = getuid (); |
| 1775 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
| 1776 | } |
| 1777 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
| 1778 | procfs_write_pckill (pi); |
| 1779 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
| 1780 | |
| 1781 | close_proc_file (pi); |
| 1782 | |
| 1783 | /* Only wait() for our direct children. Our grandchildren zombies are killed |
| 1784 | by the death of their parents. */ |
| 1785 | |
| 1786 | if (ppid == getpid()) |
| 1787 | wait ((int *) 0); |
| 1788 | } |
| 1789 | |
| 1790 | /* |
| 1791 | |
| 1792 | LOCAL FUNCTION |
| 1793 | |
| 1794 | procfs_xfer_memory -- copy data to or from inferior memory space |
| 1795 | |
| 1796 | SYNOPSIS |
| 1797 | |
| 1798 | int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, |
| 1799 | int dowrite, struct target_ops target) |
| 1800 | |
| 1801 | DESCRIPTION |
| 1802 | |
| 1803 | Copy LEN bytes to/from inferior's memory starting at MEMADDR |
| 1804 | from/to debugger memory starting at MYADDR. Copy from inferior |
| 1805 | if DOWRITE is zero or to inferior if DOWRITE is nonzero. |
| 1806 | |
| 1807 | Returns the length copied, which is either the LEN argument or |
| 1808 | zero. This xfer function does not do partial moves, since procfs_ops |
| 1809 | doesn't allow memory operations to cross below us in the target stack |
| 1810 | anyway. |
| 1811 | |
| 1812 | NOTES |
| 1813 | |
| 1814 | The /proc interface makes this an almost trivial task. |
| 1815 | */ |
| 1816 | |
| 1817 | static int |
| 1818 | procfs_xfer_memory (memaddr, myaddr, len, dowrite, target) |
| 1819 | CORE_ADDR memaddr; |
| 1820 | char *myaddr; |
| 1821 | int len; |
| 1822 | int dowrite; |
| 1823 | struct target_ops *target; /* ignored */ |
| 1824 | { |
| 1825 | int nbytes = 0; |
| 1826 | struct procinfo *pi; |
| 1827 | |
| 1828 | pi = current_procinfo; |
| 1829 | |
| 1830 | if (lseek(pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
| 1831 | { |
| 1832 | if (dowrite) |
| 1833 | { |
| 1834 | nbytes = write (pi->as_fd, myaddr, len); |
| 1835 | } |
| 1836 | else |
| 1837 | { |
| 1838 | nbytes = read (pi->as_fd, myaddr, len); |
| 1839 | } |
| 1840 | if (nbytes < 0) |
| 1841 | { |
| 1842 | nbytes = 0; |
| 1843 | } |
| 1844 | } |
| 1845 | return (nbytes); |
| 1846 | } |
| 1847 | |
| 1848 | /* |
| 1849 | |
| 1850 | LOCAL FUNCTION |
| 1851 | |
| 1852 | procfs_store_registers -- copy register values back to inferior |
| 1853 | |
| 1854 | SYNOPSIS |
| 1855 | |
| 1856 | void procfs_store_registers (int regno) |
| 1857 | |
| 1858 | DESCRIPTION |
| 1859 | |
| 1860 | Store our current register values back into the inferior. If |
| 1861 | REGNO is -1 then store all the register, otherwise store just |
| 1862 | the value specified by REGNO. |
| 1863 | |
| 1864 | NOTES |
| 1865 | |
| 1866 | If we are storing only a single register, we first have to get all |
| 1867 | the current values from the process, overwrite the desired register |
| 1868 | in the gregset with the one we want from gdb's registers, and then |
| 1869 | send the whole set back to the process. For writing all the |
| 1870 | registers, all we have to do is generate the gregset and send it to |
| 1871 | the process. |
| 1872 | |
| 1873 | Also note that the process has to be stopped on an event of interest |
| 1874 | for this to work, which basically means that it has to have been |
| 1875 | run under the control of one of the other /proc ioctl calls and not |
| 1876 | ptrace. Since we don't use ptrace anyway, we don't worry about this |
| 1877 | fine point, but it is worth noting for future reference. |
| 1878 | |
| 1879 | Gdb is confused about what this function is supposed to return. |
| 1880 | Some versions return a value, others return nothing. Some are |
| 1881 | declared to return a value and actually return nothing. Gdb ignores |
| 1882 | anything returned. (FIXME) |
| 1883 | |
| 1884 | */ |
| 1885 | |
| 1886 | static void |
| 1887 | procfs_store_registers (regno) |
| 1888 | int regno; |
| 1889 | { |
| 1890 | struct procinfo *pi; |
| 1891 | #ifdef PROCFS_USE_READ_WRITE |
| 1892 | struct greg_ctl greg; |
| 1893 | struct fpreg_ctl fpreg; |
| 1894 | #endif |
| 1895 | |
| 1896 | pi = current_procinfo; |
| 1897 | |
| 1898 | #ifdef PROCFS_USE_READ_WRITE |
| 1899 | if (regno != -1) |
| 1900 | { |
| 1901 | procfs_read_status (pi); |
| 1902 | memcpy ((char *) &greg.gregset, |
| 1903 | (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs, |
| 1904 | sizeof (gregset_t)); |
| 1905 | } |
| 1906 | fill_gregset (&greg.gregset, regno); |
| 1907 | greg.cmd = PCSREG; |
| 1908 | write (pi->ctl_fd, &greg, sizeof (greg)); |
| 1909 | #else /* PROCFS_USE_READ_WRITE */ |
| 1910 | if (regno != -1) |
| 1911 | { |
| 1912 | ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset); |
| 1913 | } |
| 1914 | fill_gregset (&pi->gregset.gregset, regno); |
| 1915 | ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset); |
| 1916 | #endif /* PROCFS_USE_READ_WRITE */ |
| 1917 | |
| 1918 | #if defined (FP0_REGNUM) |
| 1919 | |
| 1920 | /* Now repeat everything using the floating point register set, if the |
| 1921 | target has floating point hardware. Since we ignore the returned value, |
| 1922 | we'll never know whether it worked or not anyway. */ |
| 1923 | |
| 1924 | #ifdef PROCFS_USE_READ_WRITE |
| 1925 | if (regno != -1) |
| 1926 | { |
| 1927 | procfs_read_status (pi); |
| 1928 | memcpy ((char *) &fpreg.fpregset, |
| 1929 | (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs, |
| 1930 | sizeof (fpregset_t)); |
| 1931 | } |
| 1932 | fill_fpregset (&fpreg.fpregset, regno); |
| 1933 | fpreg.cmd = PCSFPREG; |
| 1934 | write (pi->ctl_fd, &fpreg, sizeof (fpreg)); |
| 1935 | #else /* PROCFS_USE_READ_WRITE */ |
| 1936 | if (regno != -1) |
| 1937 | { |
| 1938 | ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset); |
| 1939 | } |
| 1940 | fill_fpregset (&pi->fpregset.fpregset, regno); |
| 1941 | ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset); |
| 1942 | #endif /* PROCFS_USE_READ_WRITE */ |
| 1943 | |
| 1944 | #endif /* FP0_REGNUM */ |
| 1945 | |
| 1946 | } |
| 1947 | |
| 1948 | /* |
| 1949 | |
| 1950 | LOCAL FUNCTION |
| 1951 | |
| 1952 | init_procinfo - setup a procinfo struct and connect it to a process |
| 1953 | |
| 1954 | SYNOPSIS |
| 1955 | |
| 1956 | struct procinfo * init_procinfo (int pid) |
| 1957 | |
| 1958 | DESCRIPTION |
| 1959 | |
| 1960 | Allocate a procinfo structure, open the /proc file and then set up the |
| 1961 | set of signals and faults that are to be traced. Returns a pointer to |
| 1962 | the new procinfo structure. |
| 1963 | |
| 1964 | NOTES |
| 1965 | |
| 1966 | If proc_init_failed ever gets called, control returns to the command |
| 1967 | processing loop via the standard error handling code. |
| 1968 | |
| 1969 | */ |
| 1970 | |
| 1971 | static struct procinfo * |
| 1972 | init_procinfo (pid, kill) |
| 1973 | int pid; |
| 1974 | int kill; |
| 1975 | { |
| 1976 | struct procinfo *pi = (struct procinfo *) |
| 1977 | xmalloc (sizeof (struct procinfo)); |
| 1978 | |
| 1979 | memset ((char *) pi, 0, sizeof (*pi)); |
| 1980 | if (!open_proc_file (pid, pi, O_RDWR, 1)) |
| 1981 | proc_init_failed (pi, "can't open process file", kill); |
| 1982 | |
| 1983 | /* open_proc_file may modify pid. */ |
| 1984 | |
| 1985 | pid = pi -> pid; |
| 1986 | |
| 1987 | /* Add new process to process info list */ |
| 1988 | |
| 1989 | pi->next = procinfo_list; |
| 1990 | procinfo_list = pi; |
| 1991 | |
| 1992 | add_fd (pi); /* Add to list for poll/select */ |
| 1993 | |
| 1994 | /* Remember some things about the inferior that we will, or might, change |
| 1995 | so that we can restore them when we detach. */ |
| 1996 | #ifdef UNIXWARE |
| 1997 | memcpy ((char *) &pi->saved_trace.sigset, |
| 1998 | (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t)); |
| 1999 | memcpy ((char *) &pi->saved_fltset.fltset, |
| 2000 | (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t)); |
| 2001 | memcpy ((char *) &pi->saved_entryset.sysset, |
| 2002 | (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t)); |
| 2003 | memcpy ((char *) &pi->saved_exitset.sysset, |
| 2004 | (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t)); |
| 2005 | |
| 2006 | /* Set up trace and fault sets, as gdb expects them. */ |
| 2007 | |
| 2008 | prfillset (&sctl.sigset); |
| 2009 | notice_signals (pi, &sctl); |
| 2010 | prfillset (&fctl.fltset); |
| 2011 | prdelset (&fctl.fltset, FLTPAGE); |
| 2012 | |
| 2013 | #else /* ! UNIXWARE */ |
| 2014 | ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset); |
| 2015 | ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset); |
| 2016 | ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset); |
| 2017 | ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset); |
| 2018 | ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset); |
| 2019 | |
| 2020 | /* Set up trace and fault sets, as gdb expects them. */ |
| 2021 | |
| 2022 | memset ((char *) &pi->prrun, 0, sizeof (pi->prrun)); |
| 2023 | prfillset (&pi->prrun.pr_trace); |
| 2024 | procfs_notice_signals (pid); |
| 2025 | prfillset (&pi->prrun.pr_fault); |
| 2026 | prdelset (&pi->prrun.pr_fault, FLTPAGE); |
| 2027 | #ifdef PROCFS_DONT_TRACE_FAULTS |
| 2028 | premptyset (&pi->prrun.pr_fault); |
| 2029 | #endif |
| 2030 | #endif /* UNIXWARE */ |
| 2031 | |
| 2032 | if (!procfs_read_status (pi)) |
| 2033 | proc_init_failed (pi, "procfs_read_status failed", kill); |
| 2034 | |
| 2035 | return pi; |
| 2036 | } |
| 2037 | |
| 2038 | /* |
| 2039 | |
| 2040 | LOCAL FUNCTION |
| 2041 | |
| 2042 | create_procinfo - initialize access to a /proc entry |
| 2043 | |
| 2044 | SYNOPSIS |
| 2045 | |
| 2046 | struct procinfo * create_procinfo (int pid) |
| 2047 | |
| 2048 | DESCRIPTION |
| 2049 | |
| 2050 | Allocate a procinfo structure, open the /proc file and then set up the |
| 2051 | set of signals and faults that are to be traced. Returns a pointer to |
| 2052 | the new procinfo structure. |
| 2053 | |
| 2054 | NOTES |
| 2055 | |
| 2056 | If proc_init_failed ever gets called, control returns to the command |
| 2057 | processing loop via the standard error handling code. |
| 2058 | |
| 2059 | */ |
| 2060 | |
| 2061 | static struct procinfo * |
| 2062 | create_procinfo (pid) |
| 2063 | int pid; |
| 2064 | { |
| 2065 | struct procinfo *pi; |
| 2066 | struct sig_ctl sctl; |
| 2067 | struct flt_ctl fctl; |
| 2068 | |
| 2069 | pi = find_procinfo (pid, 1); |
| 2070 | if (pi != NULL) |
| 2071 | return pi; /* All done! It already exists */ |
| 2072 | |
| 2073 | pi = init_procinfo (pid, 1); |
| 2074 | |
| 2075 | #ifndef UNIXWARE |
| 2076 | /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are |
| 2077 | already stopped, even if they all have PR_ASYNC set. */ |
| 2078 | if (!(pi->prstatus.pr_flags & PR_STOPPED)) |
| 2079 | #endif |
| 2080 | if (!procfs_write_pcwstop (pi)) |
| 2081 | proc_init_failed (pi, "procfs_write_pcwstop failed", 1); |
| 2082 | |
| 2083 | #ifdef PROCFS_USE_READ_WRITE |
| 2084 | fctl.cmd = PCSFAULT; |
| 2085 | if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0) |
| 2086 | proc_init_failed (pi, "PCSFAULT failed", 1); |
| 2087 | #else |
| 2088 | if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0) |
| 2089 | proc_init_failed (pi, "PIOCSFAULT failed", 1); |
| 2090 | #endif |
| 2091 | |
| 2092 | return pi; |
| 2093 | } |
| 2094 | |
| 2095 | /* |
| 2096 | |
| 2097 | LOCAL FUNCTION |
| 2098 | |
| 2099 | procfs_exit_handler - handle entry into the _exit syscall |
| 2100 | |
| 2101 | SYNOPSIS |
| 2102 | |
| 2103 | int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 2104 | |
| 2105 | DESCRIPTION |
| 2106 | |
| 2107 | This routine is called when an inferior process enters the _exit() |
| 2108 | system call. It continues the process, and then collects the exit |
| 2109 | status and pid which are returned in *statvalp and *rtnvalp. After |
| 2110 | that it returns non-zero to indicate that procfs_wait should wake up. |
| 2111 | |
| 2112 | NOTES |
| 2113 | There is probably a better way to do this. |
| 2114 | |
| 2115 | */ |
| 2116 | |
| 2117 | static int |
| 2118 | procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 2119 | struct procinfo *pi; |
| 2120 | int syscall_num; |
| 2121 | int why; |
| 2122 | int *rtnvalp; |
| 2123 | int *statvalp; |
| 2124 | { |
| 2125 | struct procinfo *temp_pi, *next_pi; |
| 2126 | |
| 2127 | pi->prrun.pr_flags = PRCFAULT; |
| 2128 | |
| 2129 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) |
| 2130 | perror_with_name (pi->pathname); |
| 2131 | |
| 2132 | if (attach_flag) |
| 2133 | { |
| 2134 | /* Claim it exited (don't call wait). */ |
| 2135 | if (info_verbose) |
| 2136 | printf_filtered ("(attached process has exited)\n"); |
| 2137 | *statvalp = 0; |
| 2138 | *rtnvalp = inferior_pid; |
| 2139 | } |
| 2140 | else |
| 2141 | { |
| 2142 | *rtnvalp = wait (statvalp); |
| 2143 | if (*rtnvalp >= 0) |
| 2144 | *rtnvalp = pi->pid; |
| 2145 | } |
| 2146 | |
| 2147 | /* Close ALL open proc file handles, |
| 2148 | except the one that called SYS_exit. */ |
| 2149 | for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi) |
| 2150 | { |
| 2151 | next_pi = temp_pi->next; |
| 2152 | if (temp_pi == pi) |
| 2153 | continue; /* Handled below */ |
| 2154 | close_proc_file (temp_pi); |
| 2155 | } |
| 2156 | return 1; |
| 2157 | } |
| 2158 | |
| 2159 | /* |
| 2160 | |
| 2161 | LOCAL FUNCTION |
| 2162 | |
| 2163 | procfs_exec_handler - handle exit from the exec family of syscalls |
| 2164 | |
| 2165 | SYNOPSIS |
| 2166 | |
| 2167 | int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 2168 | |
| 2169 | DESCRIPTION |
| 2170 | |
| 2171 | This routine is called when an inferior process is about to finish any |
| 2172 | of the exec() family of system calls. It pretends that we got a |
| 2173 | SIGTRAP (for compatibility with ptrace behavior), and returns non-zero |
| 2174 | to tell procfs_wait to wake up. |
| 2175 | |
| 2176 | NOTES |
| 2177 | This need for compatibility with ptrace is questionable. In the |
| 2178 | future, it shouldn't be necessary. |
| 2179 | |
| 2180 | */ |
| 2181 | |
| 2182 | static int |
| 2183 | procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 2184 | struct procinfo *pi; |
| 2185 | int syscall_num; |
| 2186 | int why; |
| 2187 | int *rtnvalp; |
| 2188 | int *statvalp; |
| 2189 | { |
| 2190 | *statvalp = (SIGTRAP << 8) | 0177; |
| 2191 | |
| 2192 | return 1; |
| 2193 | } |
| 2194 | |
| 2195 | #if defined(SYS_sproc) && !defined(UNIXWARE) |
| 2196 | /* IRIX lwp creation system call */ |
| 2197 | |
| 2198 | /* |
| 2199 | |
| 2200 | LOCAL FUNCTION |
| 2201 | |
| 2202 | procfs_sproc_handler - handle exit from the sproc syscall |
| 2203 | |
| 2204 | SYNOPSIS |
| 2205 | |
| 2206 | int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 2207 | |
| 2208 | DESCRIPTION |
| 2209 | |
| 2210 | This routine is called when an inferior process is about to finish an |
| 2211 | sproc() system call. This is the system call that IRIX uses to create |
| 2212 | a lightweight process. When the target process gets this event, we can |
| 2213 | look at rval1 to find the new child processes ID, and create a new |
| 2214 | procinfo struct from that. |
| 2215 | |
| 2216 | After that, it pretends that we got a SIGTRAP, and returns non-zero |
| 2217 | to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets |
| 2218 | woken up, sees the new process and continues it. |
| 2219 | |
| 2220 | NOTES |
| 2221 | We actually never see the child exiting from sproc because we will |
| 2222 | shortly stop the child with PIOCSTOP, which is then registered as the |
| 2223 | event of interest. |
| 2224 | */ |
| 2225 | |
| 2226 | static int |
| 2227 | procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 2228 | struct procinfo *pi; |
| 2229 | int syscall_num; |
| 2230 | int why; |
| 2231 | int *rtnvalp; |
| 2232 | int *statvalp; |
| 2233 | { |
| 2234 | /* We've just detected the completion of an sproc system call. Now we need to |
| 2235 | setup a procinfo struct for this thread, and notify the thread system of the |
| 2236 | new arrival. */ |
| 2237 | |
| 2238 | /* If sproc failed, then nothing interesting happened. Continue the process |
| 2239 | and go back to sleep. */ |
| 2240 | |
| 2241 | if (pi->prstatus.pr_errno != 0) |
| 2242 | { |
| 2243 | pi->prrun.pr_flags &= PRSTEP; |
| 2244 | pi->prrun.pr_flags |= PRCFAULT; |
| 2245 | |
| 2246 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) |
| 2247 | perror_with_name (pi->pathname); |
| 2248 | |
| 2249 | return 0; |
| 2250 | } |
| 2251 | |
| 2252 | /* At this point, the new thread is stopped at it's first instruction, and |
| 2253 | the parent is stopped at the exit from sproc. */ |
| 2254 | |
| 2255 | /* Notify the caller of the arrival of a new thread. */ |
| 2256 | create_procinfo (pi->prstatus.pr_rval1); |
| 2257 | |
| 2258 | *rtnvalp = pi->prstatus.pr_rval1; |
| 2259 | *statvalp = (SIGTRAP << 8) | 0177; |
| 2260 | |
| 2261 | return 1; |
| 2262 | } |
| 2263 | |
| 2264 | /* |
| 2265 | |
| 2266 | LOCAL FUNCTION |
| 2267 | |
| 2268 | procfs_fork_handler - handle exit from the fork syscall |
| 2269 | |
| 2270 | SYNOPSIS |
| 2271 | |
| 2272 | int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 2273 | |
| 2274 | DESCRIPTION |
| 2275 | |
| 2276 | This routine is called when an inferior process is about to finish a |
| 2277 | fork() system call. We will open up the new process, and then close |
| 2278 | it, which releases it from the clutches of the debugger. |
| 2279 | |
| 2280 | After that, we continue the target process as though nothing had |
| 2281 | happened. |
| 2282 | |
| 2283 | NOTES |
| 2284 | This is necessary for IRIX because we have to set PR_FORK in order |
| 2285 | to catch the creation of lwps (via sproc()). When an actual fork |
| 2286 | occurs, it becomes necessary to reset the forks debugger flags and |
| 2287 | continue it because we can't hack multiple processes yet. |
| 2288 | */ |
| 2289 | |
| 2290 | static int |
| 2291 | procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 2292 | struct procinfo *pi; |
| 2293 | int syscall_num; |
| 2294 | int why; |
| 2295 | int *rtnvalp; |
| 2296 | int *statvalp; |
| 2297 | { |
| 2298 | struct procinfo *pitemp; |
| 2299 | |
| 2300 | /* At this point, we've detected the completion of a fork (or vfork) call in |
| 2301 | our child. The grandchild is also stopped because we set inherit-on-fork |
| 2302 | earlier. (Note that nobody has the grandchilds' /proc file open at this |
| 2303 | point.) We will release the grandchild from the debugger by opening it's |
| 2304 | /proc file and then closing it. Since run-on-last-close is set, the |
| 2305 | grandchild continues on its' merry way. */ |
| 2306 | |
| 2307 | |
| 2308 | pitemp = create_procinfo (pi->prstatus.pr_rval1); |
| 2309 | if (pitemp) |
| 2310 | close_proc_file (pitemp); |
| 2311 | |
| 2312 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) |
| 2313 | perror_with_name (pi->pathname); |
| 2314 | |
| 2315 | return 0; |
| 2316 | } |
| 2317 | #endif /* SYS_sproc && !UNIXWARE */ |
| 2318 | |
| 2319 | /* |
| 2320 | |
| 2321 | LOCAL FUNCTION |
| 2322 | |
| 2323 | procfs_set_inferior_syscall_traps - setup the syscall traps |
| 2324 | |
| 2325 | SYNOPSIS |
| 2326 | |
| 2327 | void procfs_set_inferior_syscall_traps (struct procinfo *pip) |
| 2328 | |
| 2329 | DESCRIPTION |
| 2330 | |
| 2331 | Called for each "procinfo" (process, thread, or LWP) in the |
| 2332 | inferior, to register for notification of and handlers for |
| 2333 | syscall traps in the inferior. |
| 2334 | |
| 2335 | */ |
| 2336 | |
| 2337 | static void |
| 2338 | procfs_set_inferior_syscall_traps (pip) |
| 2339 | struct procinfo *pip; |
| 2340 | { |
| 2341 | procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY, |
| 2342 | procfs_exit_handler); |
| 2343 | |
| 2344 | #ifndef PRFS_STOPEXEC |
| 2345 | #ifdef SYS_exec |
| 2346 | procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT, |
| 2347 | procfs_exec_handler); |
| 2348 | #endif |
| 2349 | #ifdef SYS_execv |
| 2350 | procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT, |
| 2351 | procfs_exec_handler); |
| 2352 | #endif |
| 2353 | #ifdef SYS_execve |
| 2354 | procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT, |
| 2355 | procfs_exec_handler); |
| 2356 | #endif |
| 2357 | #endif /* PRFS_STOPEXEC */ |
| 2358 | |
| 2359 | /* Setup traps on exit from sproc() */ |
| 2360 | |
| 2361 | #ifdef SYS_sproc |
| 2362 | procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT, |
| 2363 | procfs_sproc_handler); |
| 2364 | procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT, |
| 2365 | procfs_fork_handler); |
| 2366 | #ifdef SYS_vfork |
| 2367 | procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT, |
| 2368 | procfs_fork_handler); |
| 2369 | #endif |
| 2370 | /* Turn on inherit-on-fork flag so that all children of the target process |
| 2371 | start with tracing flags set. This allows us to trap lwp creation. Note |
| 2372 | that we also have to trap on fork and vfork in order to disable all tracing |
| 2373 | in the targets child processes. */ |
| 2374 | |
| 2375 | modify_inherit_on_fork_flag (pip->ctl_fd, 1); |
| 2376 | #endif |
| 2377 | |
| 2378 | #ifdef SYS_lwp_create |
| 2379 | procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT, |
| 2380 | procfs_lwp_creation_handler); |
| 2381 | #endif |
| 2382 | } |
| 2383 | |
| 2384 | /* |
| 2385 | |
| 2386 | LOCAL FUNCTION |
| 2387 | |
| 2388 | procfs_init_inferior - initialize target vector and access to a |
| 2389 | /proc entry |
| 2390 | |
| 2391 | SYNOPSIS |
| 2392 | |
| 2393 | int procfs_init_inferior (int pid) |
| 2394 | |
| 2395 | DESCRIPTION |
| 2396 | |
| 2397 | When gdb starts an inferior, this function is called in the parent |
| 2398 | process immediately after the fork. It waits for the child to stop |
| 2399 | on the return from the exec system call (the child itself takes care |
| 2400 | of ensuring that this is set up), then sets up the set of signals |
| 2401 | and faults that are to be traced. Returns the pid, which may have had |
| 2402 | the thread-id added to it. |
| 2403 | |
| 2404 | NOTES |
| 2405 | |
| 2406 | If proc_init_failed ever gets called, control returns to the command |
| 2407 | processing loop via the standard error handling code. |
| 2408 | |
| 2409 | */ |
| 2410 | |
| 2411 | static int |
| 2412 | procfs_init_inferior (pid) |
| 2413 | int pid; |
| 2414 | { |
| 2415 | struct procinfo *pip; |
| 2416 | |
| 2417 | push_target (&procfs_ops); |
| 2418 | |
| 2419 | pip = create_procinfo (pid); |
| 2420 | |
| 2421 | procfs_set_inferior_syscall_traps (pip); |
| 2422 | |
| 2423 | /* create_procinfo may change the pid, so we have to update inferior_pid |
| 2424 | here before calling other gdb routines that need the right pid. */ |
| 2425 | |
| 2426 | pid = pip -> pid; |
| 2427 | inferior_pid = pid; |
| 2428 | |
| 2429 | add_thread (pip -> pid); /* Setup initial thread */ |
| 2430 | |
| 2431 | #ifdef START_INFERIOR_TRAPS_EXPECTED |
| 2432 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
| 2433 | #else |
| 2434 | /* One trap to exec the shell, one to exec the program being debugged. */ |
| 2435 | startup_inferior (2); |
| 2436 | #endif |
| 2437 | |
| 2438 | return pid; |
| 2439 | } |
| 2440 | |
| 2441 | /* |
| 2442 | |
| 2443 | GLOBAL FUNCTION |
| 2444 | |
| 2445 | procfs_notice_signals |
| 2446 | |
| 2447 | SYNOPSIS |
| 2448 | |
| 2449 | static void procfs_notice_signals (int pid); |
| 2450 | |
| 2451 | DESCRIPTION |
| 2452 | |
| 2453 | When the user changes the state of gdb's signal handling via the |
| 2454 | "handle" command, this function gets called to see if any change |
| 2455 | in the /proc interface is required. It is also called internally |
| 2456 | by other /proc interface functions to initialize the state of |
| 2457 | the traced signal set. |
| 2458 | |
| 2459 | One thing it does is that signals for which the state is "nostop", |
| 2460 | "noprint", and "pass", have their trace bits reset in the pr_trace |
| 2461 | field, so that they are no longer traced. This allows them to be |
| 2462 | delivered directly to the inferior without the debugger ever being |
| 2463 | involved. |
| 2464 | */ |
| 2465 | |
| 2466 | static void |
| 2467 | procfs_notice_signals (pid) |
| 2468 | int pid; |
| 2469 | { |
| 2470 | struct procinfo *pi; |
| 2471 | struct sig_ctl sctl; |
| 2472 | |
| 2473 | pi = find_procinfo (pid, 0); |
| 2474 | |
| 2475 | #ifdef UNIXWARE |
| 2476 | premptyset (&sctl.sigset); |
| 2477 | #else |
| 2478 | sctl.sigset = pi->prrun.pr_trace; |
| 2479 | #endif |
| 2480 | |
| 2481 | notice_signals (pi, &sctl); |
| 2482 | |
| 2483 | #ifndef UNIXWARE |
| 2484 | pi->prrun.pr_trace = sctl.sigset; |
| 2485 | #endif |
| 2486 | } |
| 2487 | |
| 2488 | static void |
| 2489 | notice_signals (pi, sctl) |
| 2490 | struct procinfo *pi; |
| 2491 | struct sig_ctl *sctl; |
| 2492 | { |
| 2493 | int signo; |
| 2494 | |
| 2495 | for (signo = 0; signo < NSIG; signo++) |
| 2496 | { |
| 2497 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && |
| 2498 | signal_print_state (target_signal_from_host (signo)) == 0 && |
| 2499 | signal_pass_state (target_signal_from_host (signo)) == 1) |
| 2500 | { |
| 2501 | prdelset (&sctl->sigset, signo); |
| 2502 | } |
| 2503 | else |
| 2504 | { |
| 2505 | praddset (&sctl->sigset, signo); |
| 2506 | } |
| 2507 | } |
| 2508 | #ifdef PROCFS_USE_READ_WRITE |
| 2509 | sctl->cmd = PCSTRACE; |
| 2510 | if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0) |
| 2511 | #else |
| 2512 | if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset)) |
| 2513 | #endif |
| 2514 | { |
| 2515 | print_sys_errmsg ("PIOCSTRACE failed", errno); |
| 2516 | } |
| 2517 | } |
| 2518 | |
| 2519 | /* |
| 2520 | |
| 2521 | LOCAL FUNCTION |
| 2522 | |
| 2523 | proc_set_exec_trap -- arrange for exec'd child to halt at startup |
| 2524 | |
| 2525 | SYNOPSIS |
| 2526 | |
| 2527 | void proc_set_exec_trap (void) |
| 2528 | |
| 2529 | DESCRIPTION |
| 2530 | |
| 2531 | This function is called in the child process when starting up |
| 2532 | an inferior, prior to doing the exec of the actual inferior. |
| 2533 | It sets the child process's exitset to make exit from the exec |
| 2534 | system call an event of interest to stop on, and then simply |
| 2535 | returns. The child does the exec, the system call returns, and |
| 2536 | the child stops at the first instruction, ready for the gdb |
| 2537 | parent process to take control of it. |
| 2538 | |
| 2539 | NOTE |
| 2540 | |
| 2541 | We need to use all local variables since the child may be sharing |
| 2542 | it's data space with the parent, if vfork was used rather than |
| 2543 | fork. |
| 2544 | |
| 2545 | Also note that we want to turn off the inherit-on-fork flag in |
| 2546 | the child process so that any grand-children start with all |
| 2547 | tracing flags cleared. |
| 2548 | */ |
| 2549 | |
| 2550 | static void |
| 2551 | proc_set_exec_trap () |
| 2552 | { |
| 2553 | struct sys_ctl exitset; |
| 2554 | struct sys_ctl entryset; |
| 2555 | char procname[MAX_PROC_NAME_SIZE]; |
| 2556 | int fd; |
| 2557 | |
| 2558 | sprintf (procname, CTL_PROC_NAME_FMT, getpid ()); |
| 2559 | #ifdef UNIXWARE |
| 2560 | if ((fd = open (procname, O_WRONLY)) < 0) |
| 2561 | #else |
| 2562 | if ((fd = open (procname, O_RDWR)) < 0) |
| 2563 | #endif |
| 2564 | { |
| 2565 | perror (procname); |
| 2566 | gdb_flush (gdb_stderr); |
| 2567 | _exit (127); |
| 2568 | } |
| 2569 | premptyset (&exitset.sysset); |
| 2570 | premptyset (&entryset.sysset); |
| 2571 | |
| 2572 | #ifdef PRFS_STOPEXEC |
| 2573 | /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace |
| 2574 | exits from exec system calls because of the user level loader. */ |
| 2575 | { |
| 2576 | int prfs_flags; |
| 2577 | |
| 2578 | if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0) |
| 2579 | { |
| 2580 | perror (procname); |
| 2581 | gdb_flush (gdb_stderr); |
| 2582 | _exit (127); |
| 2583 | } |
| 2584 | prfs_flags |= PRFS_STOPEXEC; |
| 2585 | if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0) |
| 2586 | { |
| 2587 | perror (procname); |
| 2588 | gdb_flush (gdb_stderr); |
| 2589 | _exit (127); |
| 2590 | } |
| 2591 | } |
| 2592 | #else /* PRFS_STOPEXEC */ |
| 2593 | /* GW: Rationale... |
| 2594 | Not all systems with /proc have all the exec* syscalls with the same |
| 2595 | names. On the SGI, for example, there is no SYS_exec, but there |
| 2596 | *is* a SYS_execv. So, we try to account for that. */ |
| 2597 | |
| 2598 | #ifdef SYS_exec |
| 2599 | praddset (&exitset.sysset, SYS_exec); |
| 2600 | #endif |
| 2601 | #ifdef SYS_execve |
| 2602 | praddset (&exitset.sysset, SYS_execve); |
| 2603 | #endif |
| 2604 | #ifdef SYS_execv |
| 2605 | praddset (&exitset.sysset, SYS_execv); |
| 2606 | #endif |
| 2607 | |
| 2608 | #ifdef PROCFS_USE_READ_WRITE |
| 2609 | exitset.cmd = PCSEXIT; |
| 2610 | if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0) |
| 2611 | #else |
| 2612 | if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0) |
| 2613 | #endif |
| 2614 | { |
| 2615 | perror (procname); |
| 2616 | gdb_flush (gdb_stderr); |
| 2617 | _exit (127); |
| 2618 | } |
| 2619 | #endif /* PRFS_STOPEXEC */ |
| 2620 | |
| 2621 | praddset (&entryset.sysset, SYS_exit); |
| 2622 | |
| 2623 | #ifdef PROCFS_USE_READ_WRITE |
| 2624 | entryset.cmd = PCSENTRY; |
| 2625 | if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0) |
| 2626 | #else |
| 2627 | if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0) |
| 2628 | #endif |
| 2629 | { |
| 2630 | perror (procname); |
| 2631 | gdb_flush (gdb_stderr); |
| 2632 | _exit (126); |
| 2633 | } |
| 2634 | |
| 2635 | /* Turn off inherit-on-fork flag so that all grand-children of gdb |
| 2636 | start with tracing flags cleared. */ |
| 2637 | |
| 2638 | modify_inherit_on_fork_flag (fd, 0); |
| 2639 | |
| 2640 | /* Turn on run-on-last-close flag so that this process will not hang |
| 2641 | if GDB goes away for some reason. */ |
| 2642 | |
| 2643 | modify_run_on_last_close_flag (fd, 1); |
| 2644 | |
| 2645 | #ifdef PR_ASYNC |
| 2646 | { |
| 2647 | long pr_flags; |
| 2648 | struct proc_ctl pctl; |
| 2649 | |
| 2650 | /* Solaris needs this to make procfs treat all threads seperately. Without |
| 2651 | this, all threads halt whenever something happens to any thread. Since |
| 2652 | GDB wants to control all this itself, it needs to set PR_ASYNC. */ |
| 2653 | |
| 2654 | pr_flags = PR_ASYNC; |
| 2655 | #ifdef PROCFS_USE_READ_WRITE |
| 2656 | pctl.cmd = PCSET; |
| 2657 | pctl.data = PR_FORK|PR_ASYNC; |
| 2658 | write (fd, (char *) &pctl, sizeof (struct proc_ctl)); |
| 2659 | #else |
| 2660 | ioctl (fd, PIOCSET, &pr_flags); |
| 2661 | #endif |
| 2662 | } |
| 2663 | #endif /* PR_ASYNC */ |
| 2664 | } |
| 2665 | |
| 2666 | /* |
| 2667 | |
| 2668 | GLOBAL FUNCTION |
| 2669 | |
| 2670 | proc_iterate_over_mappings -- call function for every mapped space |
| 2671 | |
| 2672 | SYNOPSIS |
| 2673 | |
| 2674 | int proc_iterate_over_mappings (int (*func)()) |
| 2675 | |
| 2676 | DESCRIPTION |
| 2677 | |
| 2678 | Given a pointer to a function, call that function for every |
| 2679 | mapped address space, passing it an open file descriptor for |
| 2680 | the file corresponding to that mapped address space (if any) |
| 2681 | and the base address of the mapped space. Quit when we hit |
| 2682 | the end of the mappings or the function returns nonzero. |
| 2683 | */ |
| 2684 | |
| 2685 | #ifdef UNIXWARE |
| 2686 | int |
| 2687 | proc_iterate_over_mappings (func) |
| 2688 | int (*func) PARAMS ((int, CORE_ADDR)); |
| 2689 | { |
| 2690 | int nmap; |
| 2691 | int fd; |
| 2692 | int funcstat = 0; |
| 2693 | prmap_t *prmaps; |
| 2694 | prmap_t *prmap; |
| 2695 | struct procinfo *pi; |
| 2696 | struct stat sbuf; |
| 2697 | |
| 2698 | pi = current_procinfo; |
| 2699 | |
| 2700 | if (fstat (pi->map_fd, &sbuf) < 0) |
| 2701 | return 0; |
| 2702 | |
| 2703 | nmap = sbuf.st_size / sizeof (prmap_t); |
| 2704 | prmaps = (prmap_t *) alloca (nmap * sizeof(prmap_t)); |
| 2705 | if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) && |
| 2706 | (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) == |
| 2707 | (nmap * sizeof (prmap_t)))) |
| 2708 | { |
| 2709 | int i = 0; |
| 2710 | for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i) |
| 2711 | { |
| 2712 | char name[sizeof ("/proc/1234567890/object") + |
| 2713 | sizeof (prmap->pr_mapname)]; |
| 2714 | sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname); |
| 2715 | if ((fd = open (name, O_RDONLY)) == -1) |
| 2716 | { |
| 2717 | funcstat = 1; |
| 2718 | break; |
| 2719 | } |
| 2720 | funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr); |
| 2721 | close (fd); |
| 2722 | } |
| 2723 | } |
| 2724 | return (funcstat); |
| 2725 | } |
| 2726 | #else /* UNIXWARE */ |
| 2727 | int |
| 2728 | proc_iterate_over_mappings (func) |
| 2729 | int (*func) PARAMS ((int, CORE_ADDR)); |
| 2730 | { |
| 2731 | int nmap; |
| 2732 | int fd; |
| 2733 | int funcstat = 0; |
| 2734 | struct prmap *prmaps; |
| 2735 | struct prmap *prmap; |
| 2736 | struct procinfo *pi; |
| 2737 | |
| 2738 | pi = current_procinfo; |
| 2739 | |
| 2740 | if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0) |
| 2741 | { |
| 2742 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 2743 | if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0) |
| 2744 | { |
| 2745 | for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap) |
| 2746 | { |
| 2747 | fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0); |
| 2748 | funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr); |
| 2749 | close (fd); |
| 2750 | } |
| 2751 | } |
| 2752 | } |
| 2753 | return (funcstat); |
| 2754 | } |
| 2755 | #endif /* UNIXWARE */ |
| 2756 | |
| 2757 | #if 0 /* Currently unused */ |
| 2758 | /* |
| 2759 | |
| 2760 | GLOBAL FUNCTION |
| 2761 | |
| 2762 | proc_base_address -- find base address for segment containing address |
| 2763 | |
| 2764 | SYNOPSIS |
| 2765 | |
| 2766 | CORE_ADDR proc_base_address (CORE_ADDR addr) |
| 2767 | |
| 2768 | DESCRIPTION |
| 2769 | |
| 2770 | Given an address of a location in the inferior, find and return |
| 2771 | the base address of the mapped segment containing that address. |
| 2772 | |
| 2773 | This is used for example, by the shared library support code, |
| 2774 | where we have the pc value for some location in the shared library |
| 2775 | where we are stopped, and need to know the base address of the |
| 2776 | segment containing that address. |
| 2777 | */ |
| 2778 | |
| 2779 | CORE_ADDR |
| 2780 | proc_base_address (addr) |
| 2781 | CORE_ADDR addr; |
| 2782 | { |
| 2783 | int nmap; |
| 2784 | struct prmap *prmaps; |
| 2785 | struct prmap *prmap; |
| 2786 | CORE_ADDR baseaddr = 0; |
| 2787 | struct procinfo *pi; |
| 2788 | |
| 2789 | pi = current_procinfo; |
| 2790 | |
| 2791 | if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0) |
| 2792 | { |
| 2793 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 2794 | if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0) |
| 2795 | { |
| 2796 | for (prmap = prmaps; prmap -> pr_size; ++prmap) |
| 2797 | { |
| 2798 | if ((prmap -> pr_vaddr <= (caddr_t) addr) && |
| 2799 | (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr)) |
| 2800 | { |
| 2801 | baseaddr = (CORE_ADDR) prmap -> pr_vaddr; |
| 2802 | break; |
| 2803 | } |
| 2804 | } |
| 2805 | } |
| 2806 | } |
| 2807 | return (baseaddr); |
| 2808 | } |
| 2809 | |
| 2810 | #endif /* 0 */ |
| 2811 | |
| 2812 | /* |
| 2813 | |
| 2814 | LOCAL FUNCTION |
| 2815 | |
| 2816 | proc_address_to_fd -- return open fd for file mapped to address |
| 2817 | |
| 2818 | SYNOPSIS |
| 2819 | |
| 2820 | int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain) |
| 2821 | |
| 2822 | DESCRIPTION |
| 2823 | |
| 2824 | Given an address in the current inferior's address space, use the |
| 2825 | /proc interface to find an open file descriptor for the file that |
| 2826 | this address was mapped in from. Return -1 if there is no current |
| 2827 | inferior. Print a warning message if there is an inferior but |
| 2828 | the address corresponds to no file (IE a bogus address). |
| 2829 | |
| 2830 | */ |
| 2831 | |
| 2832 | static int |
| 2833 | proc_address_to_fd (pi, addr, complain) |
| 2834 | struct procinfo *pi; |
| 2835 | CORE_ADDR addr; |
| 2836 | int complain; |
| 2837 | { |
| 2838 | int fd = -1; |
| 2839 | |
| 2840 | if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) &addr)) < 0) |
| 2841 | { |
| 2842 | if (complain) |
| 2843 | { |
| 2844 | print_sys_errmsg (pi->pathname, errno); |
| 2845 | warning ("can't find mapped file for address 0x%x", addr); |
| 2846 | } |
| 2847 | } |
| 2848 | return (fd); |
| 2849 | } |
| 2850 | |
| 2851 | |
| 2852 | /* Attach to process PID, then initialize for debugging it |
| 2853 | and wait for the trace-trap that results from attaching. */ |
| 2854 | |
| 2855 | static void |
| 2856 | procfs_attach (args, from_tty) |
| 2857 | char *args; |
| 2858 | int from_tty; |
| 2859 | { |
| 2860 | char *exec_file; |
| 2861 | int pid; |
| 2862 | |
| 2863 | if (!args) |
| 2864 | error_no_arg ("process-id to attach"); |
| 2865 | |
| 2866 | pid = atoi (args); |
| 2867 | |
| 2868 | if (pid == getpid()) /* Trying to masturbate? */ |
| 2869 | error ("I refuse to debug myself!"); |
| 2870 | |
| 2871 | if (from_tty) |
| 2872 | { |
| 2873 | exec_file = (char *) get_exec_file (0); |
| 2874 | |
| 2875 | if (exec_file) |
| 2876 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid)); |
| 2877 | else |
| 2878 | printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid)); |
| 2879 | |
| 2880 | gdb_flush (gdb_stdout); |
| 2881 | } |
| 2882 | |
| 2883 | inferior_pid = pid = do_attach (pid); |
| 2884 | push_target (&procfs_ops); |
| 2885 | } |
| 2886 | |
| 2887 | |
| 2888 | /* Take a program previously attached to and detaches it. |
| 2889 | The program resumes execution and will no longer stop |
| 2890 | on signals, etc. We'd better not have left any breakpoints |
| 2891 | in the program or it'll die when it hits one. For this |
| 2892 | to work, it may be necessary for the process to have been |
| 2893 | previously attached. It *might* work if the program was |
| 2894 | started via the normal ptrace (PTRACE_TRACEME). */ |
| 2895 | |
| 2896 | static void |
| 2897 | procfs_detach (args, from_tty) |
| 2898 | char *args; |
| 2899 | int from_tty; |
| 2900 | { |
| 2901 | int siggnal = 0; |
| 2902 | |
| 2903 | if (from_tty) |
| 2904 | { |
| 2905 | char *exec_file = get_exec_file (0); |
| 2906 | if (exec_file == 0) |
| 2907 | exec_file = ""; |
| 2908 | printf_unfiltered ("Detaching from program: %s %s\n", |
| 2909 | exec_file, target_pid_to_str (inferior_pid)); |
| 2910 | gdb_flush (gdb_stdout); |
| 2911 | } |
| 2912 | if (args) |
| 2913 | siggnal = atoi (args); |
| 2914 | |
| 2915 | do_detach (siggnal); |
| 2916 | inferior_pid = 0; |
| 2917 | unpush_target (&procfs_ops); /* Pop out of handling an inferior */ |
| 2918 | } |
| 2919 | |
| 2920 | /* Get ready to modify the registers array. On machines which store |
| 2921 | individual registers, this doesn't need to do anything. On machines |
| 2922 | which store all the registers in one fell swoop, this makes sure |
| 2923 | that registers contains all the registers from the program being |
| 2924 | debugged. */ |
| 2925 | |
| 2926 | static void |
| 2927 | procfs_prepare_to_store () |
| 2928 | { |
| 2929 | #ifdef CHILD_PREPARE_TO_STORE |
| 2930 | CHILD_PREPARE_TO_STORE (); |
| 2931 | #endif |
| 2932 | } |
| 2933 | |
| 2934 | /* Print status information about what we're accessing. */ |
| 2935 | |
| 2936 | static void |
| 2937 | procfs_files_info (ignore) |
| 2938 | struct target_ops *ignore; |
| 2939 | { |
| 2940 | printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n", |
| 2941 | attach_flag? "attached": "child", target_pid_to_str (inferior_pid)); |
| 2942 | } |
| 2943 | |
| 2944 | /* ARGSUSED */ |
| 2945 | static void |
| 2946 | procfs_open (arg, from_tty) |
| 2947 | char *arg; |
| 2948 | int from_tty; |
| 2949 | { |
| 2950 | error ("Use the \"run\" command to start a Unix child process."); |
| 2951 | } |
| 2952 | |
| 2953 | /* |
| 2954 | |
| 2955 | LOCAL FUNCTION |
| 2956 | |
| 2957 | do_attach -- attach to an already existing process |
| 2958 | |
| 2959 | SYNOPSIS |
| 2960 | |
| 2961 | int do_attach (int pid) |
| 2962 | |
| 2963 | DESCRIPTION |
| 2964 | |
| 2965 | Attach to an already existing process with the specified process |
| 2966 | id. If the process is not already stopped, query whether to |
| 2967 | stop it or not. |
| 2968 | |
| 2969 | NOTES |
| 2970 | |
| 2971 | The option of stopping at attach time is specific to the /proc |
| 2972 | versions of gdb. Versions using ptrace force the attachee |
| 2973 | to stop. (I have changed this version to do so, too. All you |
| 2974 | have to do is "continue" to make it go on. -- gnu@cygnus.com) |
| 2975 | |
| 2976 | */ |
| 2977 | |
| 2978 | static int |
| 2979 | do_attach (pid) |
| 2980 | int pid; |
| 2981 | { |
| 2982 | struct procinfo *pi; |
| 2983 | struct sig_ctl sctl; |
| 2984 | struct flt_ctl fctl; |
| 2985 | int nlwp, *lwps; |
| 2986 | |
| 2987 | pi = init_procinfo (pid, 0); |
| 2988 | |
| 2989 | #ifdef PIOCLWPIDS |
| 2990 | nlwp = pi->prstatus.pr_nlwp; |
| 2991 | lwps = alloca ((2 * nlwp + 2) * sizeof (id_t)); |
| 2992 | |
| 2993 | if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps)) |
| 2994 | { |
| 2995 | print_sys_errmsg (pi -> pathname, errno); |
| 2996 | error ("PIOCLWPIDS failed"); |
| 2997 | } |
| 2998 | #else /* PIOCLWPIDS */ |
| 2999 | nlwp = 1; |
| 3000 | lwps = alloca ((2 * nlwp + 2) * sizeof *lwps); |
| 3001 | lwps[0] = 0; |
| 3002 | #endif |
| 3003 | for (; nlwp > 0; nlwp--, lwps++) |
| 3004 | { |
| 3005 | /* First one has already been created above. */ |
| 3006 | if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0) |
| 3007 | pi = init_procinfo ((*lwps << 16) | pid, 0); |
| 3008 | |
| 3009 | #ifdef UNIXWARE |
| 3010 | if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 3011 | #else |
| 3012 | if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 3013 | #endif |
| 3014 | { |
| 3015 | pi->was_stopped = 1; |
| 3016 | } |
| 3017 | else |
| 3018 | { |
| 3019 | pi->was_stopped = 0; |
| 3020 | if (1 || query ("Process is currently running, stop it? ")) |
| 3021 | { |
| 3022 | long cmd; |
| 3023 | /* Make it run again when we close it. */ |
| 3024 | modify_run_on_last_close_flag (pi->ctl_fd, 1); |
| 3025 | #ifdef PROCFS_USE_READ_WRITE |
| 3026 | cmd = PCSTOP; |
| 3027 | if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0) |
| 3028 | #else |
| 3029 | if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0) |
| 3030 | #endif |
| 3031 | { |
| 3032 | print_sys_errmsg (pi->pathname, errno); |
| 3033 | close_proc_file (pi); |
| 3034 | error ("PIOCSTOP failed"); |
| 3035 | } |
| 3036 | #ifdef UNIXWARE |
| 3037 | if (!procfs_read_status (pi)) |
| 3038 | { |
| 3039 | print_sys_errmsg (pi->pathname, errno); |
| 3040 | close_proc_file (pi); |
| 3041 | error ("procfs_read_status failed"); |
| 3042 | } |
| 3043 | #endif |
| 3044 | pi->nopass_next_sigstop = 1; |
| 3045 | } |
| 3046 | else |
| 3047 | { |
| 3048 | printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", |
| 3049 | target_pid_to_str (pi->pid)); |
| 3050 | } |
| 3051 | } |
| 3052 | |
| 3053 | #ifdef PROCFS_USE_READ_WRITE |
| 3054 | fctl.cmd = PCSFAULT; |
| 3055 | if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0) |
| 3056 | print_sys_errmsg ("PCSFAULT failed", errno); |
| 3057 | #else /* PROCFS_USE_READ_WRITE */ |
| 3058 | if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault)) |
| 3059 | { |
| 3060 | print_sys_errmsg ("PIOCSFAULT failed", errno); |
| 3061 | } |
| 3062 | if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace)) |
| 3063 | { |
| 3064 | print_sys_errmsg ("PIOCSTRACE failed", errno); |
| 3065 | } |
| 3066 | add_thread (pi->pid); |
| 3067 | procfs_set_inferior_syscall_traps (pi); |
| 3068 | } |
| 3069 | #endif /* PROCFS_USE_READ_WRITE */ |
| 3070 | attach_flag = 1; |
| 3071 | return (pi->pid); |
| 3072 | } |
| 3073 | |
| 3074 | /* |
| 3075 | |
| 3076 | LOCAL FUNCTION |
| 3077 | |
| 3078 | do_detach -- detach from an attached-to process |
| 3079 | |
| 3080 | SYNOPSIS |
| 3081 | |
| 3082 | void do_detach (int signal) |
| 3083 | |
| 3084 | DESCRIPTION |
| 3085 | |
| 3086 | Detach from the current attachee. |
| 3087 | |
| 3088 | If signal is non-zero, the attachee is started running again and sent |
| 3089 | the specified signal. |
| 3090 | |
| 3091 | If signal is zero and the attachee was not already stopped when we |
| 3092 | attached to it, then we make it runnable again when we detach. |
| 3093 | |
| 3094 | Otherwise, we query whether or not to make the attachee runnable |
| 3095 | again, since we may simply want to leave it in the state it was in |
| 3096 | when we attached. |
| 3097 | |
| 3098 | We report any problems, but do not consider them errors, since we |
| 3099 | MUST detach even if some things don't seem to go right. This may not |
| 3100 | be the ideal situation. (FIXME). |
| 3101 | */ |
| 3102 | |
| 3103 | static void |
| 3104 | do_detach (signal) |
| 3105 | int signal; |
| 3106 | { |
| 3107 | struct procinfo *pi; |
| 3108 | |
| 3109 | for (pi = procinfo_list; pi; pi = pi->next) |
| 3110 | { |
| 3111 | if (signal) |
| 3112 | { |
| 3113 | set_proc_siginfo (pi, signal); |
| 3114 | } |
| 3115 | #ifdef PROCFS_USE_READ_WRITE |
| 3116 | pi->saved_exitset.cmd = PCSEXIT; |
| 3117 | if (write (pi->ctl_fd, (char *) &pi->saved_exitset, |
| 3118 | sizeof (struct sys_ctl)) < 0) |
| 3119 | #else |
| 3120 | if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0) |
| 3121 | #endif |
| 3122 | { |
| 3123 | print_sys_errmsg (pi->pathname, errno); |
| 3124 | printf_unfiltered ("PIOCSEXIT failed.\n"); |
| 3125 | } |
| 3126 | #ifdef PROCFS_USE_READ_WRITE |
| 3127 | pi->saved_entryset.cmd = PCSENTRY; |
| 3128 | if (write (pi->ctl_fd, (char *) &pi->saved_entryset, |
| 3129 | sizeof (struct sys_ctl)) < 0) |
| 3130 | #else |
| 3131 | if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0) |
| 3132 | #endif |
| 3133 | { |
| 3134 | print_sys_errmsg (pi->pathname, errno); |
| 3135 | printf_unfiltered ("PIOCSENTRY failed.\n"); |
| 3136 | } |
| 3137 | #ifdef PROCFS_USE_READ_WRITE |
| 3138 | pi->saved_trace.cmd = PCSTRACE; |
| 3139 | if (write (pi->ctl_fd, (char *) &pi->saved_trace, |
| 3140 | sizeof (struct sig_ctl)) < 0) |
| 3141 | #else |
| 3142 | if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0) |
| 3143 | #endif |
| 3144 | { |
| 3145 | print_sys_errmsg (pi->pathname, errno); |
| 3146 | printf_unfiltered ("PIOCSTRACE failed.\n"); |
| 3147 | } |
| 3148 | #ifndef UNIXWARE |
| 3149 | if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0) |
| 3150 | { |
| 3151 | print_sys_errmsg (pi->pathname, errno); |
| 3152 | printf_unfiltered ("PIOSCHOLD failed.\n"); |
| 3153 | } |
| 3154 | #endif |
| 3155 | #ifdef PROCFS_USE_READ_WRITE |
| 3156 | pi->saved_fltset.cmd = PCSFAULT; |
| 3157 | if (write (pi->ctl_fd, (char *) &pi->saved_fltset, |
| 3158 | sizeof (struct flt_ctl)) < 0) |
| 3159 | #else |
| 3160 | if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0) |
| 3161 | #endif |
| 3162 | { |
| 3163 | print_sys_errmsg (pi->pathname, errno); |
| 3164 | printf_unfiltered ("PIOCSFAULT failed.\n"); |
| 3165 | } |
| 3166 | if (!procfs_read_status (pi)) |
| 3167 | { |
| 3168 | print_sys_errmsg (pi->pathname, errno); |
| 3169 | printf_unfiltered ("procfs_read_status failed.\n"); |
| 3170 | } |
| 3171 | else |
| 3172 | { |
| 3173 | #ifdef UNIXWARE |
| 3174 | if (signal || (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))) |
| 3175 | #else |
| 3176 | if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))) |
| 3177 | #endif |
| 3178 | { |
| 3179 | long cmd; |
| 3180 | struct proc_ctl pctl; |
| 3181 | |
| 3182 | if (signal || !pi->was_stopped || |
| 3183 | query ("Was stopped when attached, make it runnable again? ")) |
| 3184 | { |
| 3185 | /* Clear any pending signal if we want to detach without |
| 3186 | a signal. */ |
| 3187 | if (signal == 0) |
| 3188 | set_proc_siginfo (pi, signal); |
| 3189 | |
| 3190 | /* Clear any fault that might have stopped it. */ |
| 3191 | #ifdef PROCFS_USE_READ_WRITE |
| 3192 | cmd = PCCFAULT; |
| 3193 | if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0) |
| 3194 | #else |
| 3195 | if (ioctl (pi->ctl_fd, PIOCCFAULT, 0)) |
| 3196 | #endif |
| 3197 | { |
| 3198 | print_sys_errmsg (pi->pathname, errno); |
| 3199 | printf_unfiltered ("PIOCCFAULT failed.\n"); |
| 3200 | } |
| 3201 | |
| 3202 | /* Make it run again when we close it. */ |
| 3203 | |
| 3204 | modify_run_on_last_close_flag (pi->ctl_fd, 1); |
| 3205 | } |
| 3206 | } |
| 3207 | } |
| 3208 | close_proc_file (pi); |
| 3209 | } |
| 3210 | attach_flag = 0; |
| 3211 | } |
| 3212 | |
| 3213 | /* emulate wait() as much as possible. |
| 3214 | Wait for child to do something. Return pid of child, or -1 in case |
| 3215 | of error; store status in *OURSTATUS. |
| 3216 | |
| 3217 | Not sure why we can't |
| 3218 | just use wait(), but it seems to have problems when applied to a |
| 3219 | process being controlled with the /proc interface. |
| 3220 | |
| 3221 | We have a race problem here with no obvious solution. We need to let |
| 3222 | the inferior run until it stops on an event of interest, which means |
| 3223 | that we need to use the PIOCWSTOP ioctl. However, we cannot use this |
| 3224 | ioctl if the process is already stopped on something that is not an |
| 3225 | event of interest, or the call will hang indefinitely. Thus we first |
| 3226 | use PIOCSTATUS to see if the process is not stopped. If not, then we |
| 3227 | use PIOCWSTOP. But during the window between the two, if the process |
| 3228 | stops for any reason that is not an event of interest (such as a job |
| 3229 | control signal) then gdb will hang. One possible workaround is to set |
| 3230 | an alarm to wake up every minute of so and check to see if the process |
| 3231 | is still running, and if so, then reissue the PIOCWSTOP. But this is |
| 3232 | a real kludge, so has not been implemented. FIXME: investigate |
| 3233 | alternatives. |
| 3234 | |
| 3235 | FIXME: Investigate why wait() seems to have problems with programs |
| 3236 | being control by /proc routines. */ |
| 3237 | static int |
| 3238 | procfs_wait (pid, ourstatus) |
| 3239 | int pid; |
| 3240 | struct target_waitstatus *ourstatus; |
| 3241 | { |
| 3242 | short what; |
| 3243 | short why; |
| 3244 | int statval = 0; |
| 3245 | int checkerr = 0; |
| 3246 | int rtnval = -1; |
| 3247 | struct procinfo *pi; |
| 3248 | struct proc_ctl pctl; |
| 3249 | |
| 3250 | #ifndef UNIXWARE |
| 3251 | if (pid != -1) /* Non-specific process? */ |
| 3252 | pi = NULL; |
| 3253 | else |
| 3254 | for (pi = procinfo_list; pi; pi = pi->next) |
| 3255 | if (pi->had_event) |
| 3256 | break; |
| 3257 | |
| 3258 | if (!pi) |
| 3259 | { |
| 3260 | wait_again: |
| 3261 | |
| 3262 | if (pi) |
| 3263 | pi->had_event = 0; |
| 3264 | |
| 3265 | pi = wait_fd (); |
| 3266 | } |
| 3267 | |
| 3268 | if (pid != -1) |
| 3269 | for (pi = procinfo_list; pi; pi = pi->next) |
| 3270 | if (pi->pid == pid && pi->had_event) |
| 3271 | break; |
| 3272 | #endif |
| 3273 | |
| 3274 | if (!pi && !checkerr) |
| 3275 | goto wait_again; |
| 3276 | |
| 3277 | #ifdef UNIXWARE |
| 3278 | if (!checkerr && !(pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))) |
| 3279 | #else |
| 3280 | if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))) |
| 3281 | #endif |
| 3282 | { |
| 3283 | if (!procfs_write_pcwstop (pi)) |
| 3284 | { |
| 3285 | checkerr++; |
| 3286 | } |
| 3287 | } |
| 3288 | if (checkerr) |
| 3289 | { |
| 3290 | if (errno == ENOENT) |
| 3291 | { |
| 3292 | /* XXX Fixme -- what to do if attached? Can't call wait... */ |
| 3293 | rtnval = wait (&statval); |
| 3294 | if ((rtnval) != (inferior_pid)) |
| 3295 | { |
| 3296 | print_sys_errmsg (pi->pathname, errno); |
| 3297 | error ("procfs_wait: wait failed, returned %d", rtnval); |
| 3298 | /* NOTREACHED */ |
| 3299 | } |
| 3300 | } |
| 3301 | else |
| 3302 | { |
| 3303 | print_sys_errmsg (pi->pathname, errno); |
| 3304 | error ("PIOCSTATUS or PIOCWSTOP failed."); |
| 3305 | /* NOTREACHED */ |
| 3306 | } |
| 3307 | } |
| 3308 | else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 3309 | { |
| 3310 | #ifdef UNIXWARE |
| 3311 | rtnval = pi->prstatus.pr_pid; |
| 3312 | why = pi->prstatus.pr_lwp.pr_why; |
| 3313 | what = pi->prstatus.pr_lwp.pr_what; |
| 3314 | #else |
| 3315 | rtnval = pi->pid; |
| 3316 | why = pi->prstatus.pr_why; |
| 3317 | what = pi->prstatus.pr_what; |
| 3318 | #endif |
| 3319 | |
| 3320 | switch (why) |
| 3321 | { |
| 3322 | case PR_SIGNALLED: |
| 3323 | statval = (what << 8) | 0177; |
| 3324 | break; |
| 3325 | case PR_SYSENTRY: |
| 3326 | case PR_SYSEXIT: |
| 3327 | { |
| 3328 | int i; |
| 3329 | int found_handler = 0; |
| 3330 | |
| 3331 | for (i = 0; i < pi->num_syscall_handlers; i++) |
| 3332 | if (pi->syscall_handlers[i].syscall_num == what) |
| 3333 | { |
| 3334 | found_handler = 1; |
| 3335 | if (!pi->syscall_handlers[i].func (pi, what, why, |
| 3336 | &rtnval, &statval)) |
| 3337 | goto wait_again; |
| 3338 | |
| 3339 | break; |
| 3340 | } |
| 3341 | |
| 3342 | if (!found_handler) |
| 3343 | if (why == PR_SYSENTRY) |
| 3344 | error ("PR_SYSENTRY, unhandled system call %d", what); |
| 3345 | else |
| 3346 | error ("PR_SYSEXIT, unhandled system call %d", what); |
| 3347 | } |
| 3348 | break; |
| 3349 | case PR_REQUESTED: |
| 3350 | statval = (SIGSTOP << 8) | 0177; |
| 3351 | break; |
| 3352 | case PR_JOBCONTROL: |
| 3353 | statval = (what << 8) | 0177; |
| 3354 | break; |
| 3355 | case PR_FAULTED: |
| 3356 | switch (what) |
| 3357 | { |
| 3358 | #ifdef FLTWATCH |
| 3359 | case FLTWATCH: |
| 3360 | statval = (SIGTRAP << 8) | 0177; |
| 3361 | break; |
| 3362 | #endif |
| 3363 | #ifdef FLTKWATCH |
| 3364 | case FLTKWATCH: |
| 3365 | statval = (SIGTRAP << 8) | 0177; |
| 3366 | break; |
| 3367 | #endif |
| 3368 | #ifndef FAULTED_USE_SIGINFO |
| 3369 | /* Irix, contrary to the documentation, fills in 0 for si_signo. |
| 3370 | Solaris fills in si_signo. I'm not sure about others. */ |
| 3371 | case FLTPRIV: |
| 3372 | case FLTILL: |
| 3373 | statval = (SIGILL << 8) | 0177; |
| 3374 | break; |
| 3375 | case FLTBPT: |
| 3376 | case FLTTRACE: |
| 3377 | statval = (SIGTRAP << 8) | 0177; |
| 3378 | break; |
| 3379 | case FLTSTACK: |
| 3380 | case FLTACCESS: |
| 3381 | case FLTBOUNDS: |
| 3382 | statval = (SIGSEGV << 8) | 0177; |
| 3383 | break; |
| 3384 | case FLTIOVF: |
| 3385 | case FLTIZDIV: |
| 3386 | case FLTFPE: |
| 3387 | statval = (SIGFPE << 8) | 0177; |
| 3388 | break; |
| 3389 | case FLTPAGE: /* Recoverable page fault */ |
| 3390 | #endif /* not FAULTED_USE_SIGINFO */ |
| 3391 | default: |
| 3392 | /* Use the signal which the kernel assigns. This is better than |
| 3393 | trying to second-guess it from the fault. In fact, I suspect |
| 3394 | that FLTACCESS can be either SIGSEGV or SIGBUS. */ |
| 3395 | #ifdef UNIXWARE |
| 3396 | statval = ((pi->prstatus.pr_lwp.pr_info.si_signo) << 8) | 0177; |
| 3397 | #else |
| 3398 | statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177; |
| 3399 | #endif |
| 3400 | break; |
| 3401 | } |
| 3402 | break; |
| 3403 | default: |
| 3404 | error ("PIOCWSTOP, unknown why %d, what %d", why, what); |
| 3405 | } |
| 3406 | /* Stop all the other threads when any of them stops. */ |
| 3407 | |
| 3408 | { |
| 3409 | struct procinfo *procinfo, *next_pi; |
| 3410 | |
| 3411 | for (procinfo = procinfo_list; procinfo; procinfo = next_pi) |
| 3412 | { |
| 3413 | next_pi = procinfo->next; |
| 3414 | if (!procinfo->had_event) |
| 3415 | { |
| 3416 | #ifdef PROCFS_USE_READ_WRITE |
| 3417 | cmd = PCSTOP; |
| 3418 | if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0) |
| 3419 | { |
| 3420 | print_sys_errmsg (procinfo->pathname, errno); |
| 3421 | error ("PCSTOP failed"); |
| 3422 | } |
| 3423 | #else |
| 3424 | /* A bug in Solaris (2.5) causes us to hang when trying to |
| 3425 | stop a stopped process. So, we have to check first in |
| 3426 | order to avoid the hang. */ |
| 3427 | if (!procfs_read_status (procinfo)) |
| 3428 | { |
| 3429 | /* The LWP has apparently terminated. */ |
| 3430 | if (info_verbose) |
| 3431 | printf_filtered ("LWP %d doesn't respond.\n", |
| 3432 | (procinfo->pid >> 16) & 0xffff); |
| 3433 | close_proc_file (procinfo); |
| 3434 | continue; |
| 3435 | } |
| 3436 | |
| 3437 | if (!(procinfo->prstatus.pr_flags & PR_STOPPED)) |
| 3438 | if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus) |
| 3439 | < 0) |
| 3440 | { |
| 3441 | print_sys_errmsg (procinfo->pathname, errno); |
| 3442 | warning ("PIOCSTOP failed"); |
| 3443 | } |
| 3444 | #endif |
| 3445 | } |
| 3446 | } |
| 3447 | } |
| 3448 | } |
| 3449 | else |
| 3450 | { |
| 3451 | error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x", |
| 3452 | pi->prstatus.pr_flags); |
| 3453 | } |
| 3454 | |
| 3455 | store_waitstatus (ourstatus, statval); |
| 3456 | |
| 3457 | if (rtnval == -1) /* No more children to wait for */ |
| 3458 | { |
| 3459 | warning ("Child process unexpectedly missing"); |
| 3460 | /* Claim it exited with unknown signal. */ |
| 3461 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| 3462 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
| 3463 | return rtnval; |
| 3464 | } |
| 3465 | |
| 3466 | pi->had_event = 0; /* Indicate that we've seen this one */ |
| 3467 | return (rtnval); |
| 3468 | } |
| 3469 | |
| 3470 | /* |
| 3471 | |
| 3472 | LOCAL FUNCTION |
| 3473 | |
| 3474 | set_proc_siginfo - set a process's current signal info |
| 3475 | |
| 3476 | SYNOPSIS |
| 3477 | |
| 3478 | void set_proc_siginfo (struct procinfo *pip, int signo); |
| 3479 | |
| 3480 | DESCRIPTION |
| 3481 | |
| 3482 | Given a pointer to a process info struct in PIP and a signal number |
| 3483 | in SIGNO, set the process's current signal and its associated signal |
| 3484 | information. The signal will be delivered to the process immediately |
| 3485 | after execution is resumed, even if it is being held. In addition, |
| 3486 | this particular delivery will not cause another PR_SIGNALLED stop |
| 3487 | even if the signal is being traced. |
| 3488 | |
| 3489 | If we are not delivering the same signal that the prstatus siginfo |
| 3490 | struct contains information about, then synthesize a siginfo struct |
| 3491 | to match the signal we are doing to deliver, make it of the type |
| 3492 | "generated by a user process", and send this synthesized copy. When |
| 3493 | used to set the inferior's signal state, this will be required if we |
| 3494 | are not currently stopped because of a traced signal, or if we decide |
| 3495 | to continue with a different signal. |
| 3496 | |
| 3497 | Note that when continuing the inferior from a stop due to receipt |
| 3498 | of a traced signal, we either have set PRCSIG to clear the existing |
| 3499 | signal, or we have to call this function to do a PIOCSSIG with either |
| 3500 | the existing siginfo struct from pr_info, or one we have synthesized |
| 3501 | appropriately for the signal we want to deliver. Otherwise if the |
| 3502 | signal is still being traced, the inferior will immediately stop |
| 3503 | again. |
| 3504 | |
| 3505 | See siginfo(5) for more details. |
| 3506 | */ |
| 3507 | |
| 3508 | static void |
| 3509 | set_proc_siginfo (pip, signo) |
| 3510 | struct procinfo *pip; |
| 3511 | int signo; |
| 3512 | { |
| 3513 | struct siginfo newsiginfo; |
| 3514 | struct siginfo *sip; |
| 3515 | struct sigi_ctl sictl; |
| 3516 | |
| 3517 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
| 3518 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it |
| 3519 | receives a PIOCSSIG with a signal identical to the current signal, |
| 3520 | it messes up the current signal. Work around the kernel bug. */ |
| 3521 | #ifdef UNIXWARE |
| 3522 | if (signo == pip -> prstatus.pr_lwp.pr_cursig) |
| 3523 | #else |
| 3524 | if (signo == pip -> prstatus.pr_cursig) |
| 3525 | #endif |
| 3526 | return; |
| 3527 | #endif |
| 3528 | |
| 3529 | #ifdef UNIXWARE |
| 3530 | if (signo == pip->prstatus.pr_lwp.pr_info.si_signo) |
| 3531 | { |
| 3532 | memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info, |
| 3533 | sizeof (siginfo_t)); |
| 3534 | } |
| 3535 | #else |
| 3536 | if (signo == pip -> prstatus.pr_info.si_signo) |
| 3537 | { |
| 3538 | sip = &pip -> prstatus.pr_info; |
| 3539 | } |
| 3540 | #endif |
| 3541 | else |
| 3542 | { |
| 3543 | #ifdef UNIXWARE |
| 3544 | siginfo_t *sip = &sictl.siginfo; |
| 3545 | memset ((char *) sip, 0, sizeof (siginfo_t)); |
| 3546 | #else |
| 3547 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
| 3548 | sip = &newsiginfo; |
| 3549 | #endif |
| 3550 | sip -> si_signo = signo; |
| 3551 | sip -> si_code = 0; |
| 3552 | sip -> si_errno = 0; |
| 3553 | sip -> si_pid = getpid (); |
| 3554 | sip -> si_uid = getuid (); |
| 3555 | } |
| 3556 | #ifdef PROCFS_USE_READ_WRITE |
| 3557 | sictl.cmd = PCSSIG; |
| 3558 | if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0) |
| 3559 | #else |
| 3560 | if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0) |
| 3561 | #endif |
| 3562 | { |
| 3563 | print_sys_errmsg (pip -> pathname, errno); |
| 3564 | warning ("PIOCSSIG failed"); |
| 3565 | } |
| 3566 | } |
| 3567 | |
| 3568 | /* Resume execution of process PID. If STEP is nozero, then |
| 3569 | just single step it. If SIGNAL is nonzero, restart it with that |
| 3570 | signal activated. */ |
| 3571 | |
| 3572 | static void |
| 3573 | procfs_resume (pid, step, signo) |
| 3574 | int pid; |
| 3575 | int step; |
| 3576 | enum target_signal signo; |
| 3577 | { |
| 3578 | int signal_to_pass; |
| 3579 | struct procinfo *pi, *procinfo, *next_pi; |
| 3580 | struct proc_ctl pctl; |
| 3581 | |
| 3582 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); |
| 3583 | |
| 3584 | errno = 0; |
| 3585 | #ifdef UNIXWARE |
| 3586 | pctl.cmd = PCRUN; |
| 3587 | pctl.data = PRCFAULT; |
| 3588 | #else |
| 3589 | pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT; |
| 3590 | #endif |
| 3591 | |
| 3592 | #if 0 |
| 3593 | /* It should not be necessary. If the user explicitly changes the value, |
| 3594 | value_assign calls write_register_bytes, which writes it. */ |
| 3595 | /* It may not be absolutely necessary to specify the PC value for |
| 3596 | restarting, but to be safe we use the value that gdb considers |
| 3597 | to be current. One case where this might be necessary is if the |
| 3598 | user explicitly changes the PC value that gdb considers to be |
| 3599 | current. FIXME: Investigate if this is necessary or not. */ |
| 3600 | |
| 3601 | #ifdef PRSVADDR_BROKEN |
| 3602 | /* Can't do this under Solaris running on a Sparc, as there seems to be no |
| 3603 | place to put nPC. In fact, if you use this, nPC seems to be set to some |
| 3604 | random garbage. We have to rely on the fact that PC and nPC have been |
| 3605 | written previously via PIOCSREG during a register flush. */ |
| 3606 | |
| 3607 | pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)]; |
| 3608 | pi->prrun.pr_flags != PRSVADDR; |
| 3609 | #endif |
| 3610 | #endif |
| 3611 | |
| 3612 | if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop) |
| 3613 | /* When attaching to a child process, if we forced it to stop with |
| 3614 | a PIOCSTOP, then we will have set the nopass_next_sigstop flag. |
| 3615 | Upon resuming the first time after such a stop, we explicitly |
| 3616 | inhibit sending it another SIGSTOP, which would be the normal |
| 3617 | result of default signal handling. One potential drawback to |
| 3618 | this is that we will also ignore any attempt to by the user |
| 3619 | to explicitly continue after the attach with a SIGSTOP. Ultimately |
| 3620 | this problem should be dealt with by making the routines that |
| 3621 | deal with the inferior a little smarter, and possibly even allow |
| 3622 | an inferior to continue running at the same time as gdb. (FIXME?) */ |
| 3623 | signal_to_pass = 0; |
| 3624 | else if (signo == TARGET_SIGNAL_TSTP |
| 3625 | #ifdef UNIXWARE |
| 3626 | && pi->prstatus.pr_lwp.pr_cursig == SIGTSTP |
| 3627 | && pi->prstatus.pr_lwp.pr_action.sa_handler == SIG_DFL |
| 3628 | #else |
| 3629 | && pi->prstatus.pr_cursig == SIGTSTP |
| 3630 | && pi->prstatus.pr_action.sa_handler == SIG_DFL |
| 3631 | #endif |
| 3632 | ) |
| 3633 | |
| 3634 | /* We are about to pass the inferior a SIGTSTP whose action is |
| 3635 | SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop |
| 3636 | (notifying the parent via wait()), and then keep going from the |
| 3637 | same place when the parent is ready for you to keep going. So |
| 3638 | under the debugger, it should do nothing (as if the program had |
| 3639 | been stopped and then later resumed. Under ptrace, this |
| 3640 | happens for us, but under /proc, the system obligingly stops |
| 3641 | the process, and wait_for_inferior would have no way of |
| 3642 | distinguishing that type of stop (which indicates that we |
| 3643 | should just start it again), with a stop due to the pr_trace |
| 3644 | field of the prrun_t struct. |
| 3645 | |
| 3646 | Note that if the SIGTSTP is being caught, we *do* need to pass it, |
| 3647 | because the handler needs to get executed. */ |
| 3648 | signal_to_pass = 0; |
| 3649 | else |
| 3650 | signal_to_pass = target_signal_to_host (signo); |
| 3651 | |
| 3652 | if (signal_to_pass) |
| 3653 | { |
| 3654 | set_proc_siginfo (pi, signal_to_pass); |
| 3655 | } |
| 3656 | else |
| 3657 | { |
| 3658 | #ifdef UNIXWARE |
| 3659 | pctl.data |= PRCSIG; |
| 3660 | #else |
| 3661 | pi->prrun.pr_flags |= PRCSIG; |
| 3662 | #endif |
| 3663 | } |
| 3664 | pi->nopass_next_sigstop = 0; |
| 3665 | if (step) |
| 3666 | { |
| 3667 | #ifdef UNIXWARE |
| 3668 | pctl.data |= PRSTEP; |
| 3669 | #else |
| 3670 | pi->prrun.pr_flags |= PRSTEP; |
| 3671 | #endif |
| 3672 | } |
| 3673 | pi->had_event = 0; |
| 3674 | /* Don't try to start a process unless it's stopped on an |
| 3675 | `event of interest'. Doing so will cause errors. */ |
| 3676 | |
| 3677 | if (!procfs_read_status (pi)) |
| 3678 | { |
| 3679 | /* The LWP has apparently terminated. */ |
| 3680 | if (info_verbose) |
| 3681 | printf_filtered ("LWP %d doesn't respond.\n", |
| 3682 | (pi->pid >> 16) & 0xffff); |
| 3683 | close_proc_file (pi); |
| 3684 | } |
| 3685 | else |
| 3686 | { |
| 3687 | #ifdef PROCFS_USE_READ_WRITE |
| 3688 | if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) |
| 3689 | #else |
| 3690 | if ((pi->prstatus.pr_flags & PR_ISTOP) |
| 3691 | && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) |
| 3692 | #endif |
| 3693 | { |
| 3694 | /* The LWP has apparently terminated. */ |
| 3695 | if (info_verbose) |
| 3696 | printf_filtered ("LWP %d doesn't respond.\n", |
| 3697 | (pi->pid >> 16) & 0xffff); |
| 3698 | close_proc_file (pi); |
| 3699 | } |
| 3700 | } |
| 3701 | |
| 3702 | /* Continue all the other threads that haven't had an event of interest. |
| 3703 | Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only |
| 3704 | set by do_attach, and means this is the first resume after an attach. |
| 3705 | All threads were CSTOP'd by do_attach, and should be resumed now. */ |
| 3706 | |
| 3707 | if (pid == -1) |
| 3708 | for (procinfo = procinfo_list; procinfo; procinfo = next_pi) |
| 3709 | { |
| 3710 | next_pi = procinfo->next; |
| 3711 | if (pi != procinfo) |
| 3712 | if (!procinfo->had_event || |
| 3713 | (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP)) |
| 3714 | { |
| 3715 | procinfo->had_event = procinfo->nopass_next_sigstop = 0; |
| 3716 | #ifdef PROCFS_USE_READ_WRITE |
| 3717 | pctl.data = PRCFAULT | PRCSIG; |
| 3718 | if (write (procinfo->ctl_fd, (char *) &pctl, |
| 3719 | sizeof (struct proc_ctl)) < 0) |
| 3720 | { |
| 3721 | if (!procfs_read_status (procinfo)) |
| 3722 | fprintf_unfiltered(gdb_stderr, |
| 3723 | "procfs_read_status failed, errno=%d\n", |
| 3724 | errno); |
| 3725 | print_sys_errmsg (procinfo->pathname, errno); |
| 3726 | error ("PCRUN failed"); |
| 3727 | } |
| 3728 | procfs_read_status (procinfo); |
| 3729 | #else |
| 3730 | procinfo->prrun.pr_flags &= PRSTEP; |
| 3731 | procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG; |
| 3732 | if (!procfs_read_status (procinfo)) |
| 3733 | { |
| 3734 | /* The LWP has apparently terminated. */ |
| 3735 | if (info_verbose) |
| 3736 | printf_filtered ("LWP %d doesn't respond.\n", |
| 3737 | (procinfo->pid >> 16) & 0xffff); |
| 3738 | close_proc_file (procinfo); |
| 3739 | continue; |
| 3740 | } |
| 3741 | |
| 3742 | /* Don't try to start a process unless it's stopped on an |
| 3743 | `event of interest'. Doing so will cause errors. */ |
| 3744 | |
| 3745 | if ((procinfo->prstatus.pr_flags & PR_ISTOP) |
| 3746 | && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0) |
| 3747 | { |
| 3748 | if (!procfs_read_status (procinfo)) |
| 3749 | fprintf_unfiltered(gdb_stderr, |
| 3750 | "procfs_read_status failed, errno=%d\n", |
| 3751 | errno); |
| 3752 | print_sys_errmsg (procinfo->pathname, errno); |
| 3753 | warning ("PIOCRUN failed"); |
| 3754 | } |
| 3755 | } |
| 3756 | procfs_read_status (procinfo); |
| 3757 | #endif |
| 3758 | } |
| 3759 | } |
| 3760 | |
| 3761 | /* |
| 3762 | |
| 3763 | LOCAL FUNCTION |
| 3764 | |
| 3765 | procfs_fetch_registers -- fetch current registers from inferior |
| 3766 | |
| 3767 | SYNOPSIS |
| 3768 | |
| 3769 | void procfs_fetch_registers (int regno) |
| 3770 | |
| 3771 | DESCRIPTION |
| 3772 | |
| 3773 | Read the current values of the inferior's registers, both the |
| 3774 | general register set and floating point registers (if supported) |
| 3775 | and update gdb's idea of their current values. |
| 3776 | |
| 3777 | */ |
| 3778 | |
| 3779 | static void |
| 3780 | procfs_fetch_registers (regno) |
| 3781 | int regno; |
| 3782 | { |
| 3783 | struct procinfo *pi; |
| 3784 | |
| 3785 | pi = current_procinfo; |
| 3786 | |
| 3787 | #ifdef UNIXWARE |
| 3788 | if (procfs_read_status (pi)) |
| 3789 | { |
| 3790 | supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs); |
| 3791 | #if defined (FP0_REGNUM) |
| 3792 | supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs); |
| 3793 | #endif |
| 3794 | } |
| 3795 | #else /* UNIXWARE */ |
| 3796 | if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1) |
| 3797 | { |
| 3798 | supply_gregset (&pi->gregset.gregset); |
| 3799 | } |
| 3800 | #if defined (FP0_REGNUM) |
| 3801 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1) |
| 3802 | { |
| 3803 | supply_fpregset (&pi->fpregset.fpregset); |
| 3804 | } |
| 3805 | #endif |
| 3806 | #endif /* UNIXWARE */ |
| 3807 | } |
| 3808 | |
| 3809 | /* |
| 3810 | |
| 3811 | LOCAL FUNCTION |
| 3812 | |
| 3813 | proc_init_failed - called when /proc access initialization fails |
| 3814 | fails |
| 3815 | |
| 3816 | SYNOPSIS |
| 3817 | |
| 3818 | static void proc_init_failed (struct procinfo *pi, |
| 3819 | char *why, int kill_p) |
| 3820 | |
| 3821 | DESCRIPTION |
| 3822 | |
| 3823 | This function is called whenever initialization of access to a /proc |
| 3824 | entry fails. It prints a suitable error message, does some cleanup, |
| 3825 | and then invokes the standard error processing routine which dumps |
| 3826 | us back into the command loop. If KILL_P is true, sends SIGKILL. |
| 3827 | */ |
| 3828 | |
| 3829 | static void |
| 3830 | proc_init_failed (pi, why, kill_p) |
| 3831 | struct procinfo *pi; |
| 3832 | char *why; |
| 3833 | int kill_p; |
| 3834 | { |
| 3835 | print_sys_errmsg (pi->pathname, errno); |
| 3836 | if (kill_p) |
| 3837 | kill (pi->pid, SIGKILL); |
| 3838 | close_proc_file (pi); |
| 3839 | error (why); |
| 3840 | /* NOTREACHED */ |
| 3841 | } |
| 3842 | |
| 3843 | /* |
| 3844 | |
| 3845 | LOCAL FUNCTION |
| 3846 | |
| 3847 | close_proc_file - close any currently open /proc entry |
| 3848 | |
| 3849 | SYNOPSIS |
| 3850 | |
| 3851 | static void close_proc_file (struct procinfo *pip) |
| 3852 | |
| 3853 | DESCRIPTION |
| 3854 | |
| 3855 | Close any currently open /proc entry and mark the process information |
| 3856 | entry as invalid. In order to ensure that we don't try to reuse any |
| 3857 | stale information, the pid, fd, and pathnames are explicitly |
| 3858 | invalidated, which may be overkill. |
| 3859 | |
| 3860 | */ |
| 3861 | |
| 3862 | static void |
| 3863 | close_proc_file (pip) |
| 3864 | struct procinfo *pip; |
| 3865 | { |
| 3866 | struct procinfo *procinfo; |
| 3867 | |
| 3868 | delete_thread (pip->pid); /* remove thread from GDB's thread list */ |
| 3869 | remove_fd (pip); /* Remove fd from poll/select list */ |
| 3870 | |
| 3871 | close (pip->ctl_fd); |
| 3872 | #ifdef HAVE_MULTIPLE_PROC_FDS |
| 3873 | close (pip->as_fd); |
| 3874 | close (pip->status_fd); |
| 3875 | close (pip->map_fd); |
| 3876 | #endif |
| 3877 | |
| 3878 | free (pip -> pathname); |
| 3879 | |
| 3880 | /* Unlink pip from the procinfo chain. Note pip might not be on the list. */ |
| 3881 | |
| 3882 | if (procinfo_list == pip) |
| 3883 | procinfo_list = pip->next; |
| 3884 | else |
| 3885 | { |
| 3886 | for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next) |
| 3887 | { |
| 3888 | if (procinfo->next == pip) |
| 3889 | { |
| 3890 | procinfo->next = pip->next; |
| 3891 | break; |
| 3892 | } |
| 3893 | } |
| 3894 | free (pip); |
| 3895 | } |
| 3896 | } |
| 3897 | |
| 3898 | /* |
| 3899 | |
| 3900 | LOCAL FUNCTION |
| 3901 | |
| 3902 | open_proc_file - open a /proc entry for a given process id |
| 3903 | |
| 3904 | SYNOPSIS |
| 3905 | |
| 3906 | static int open_proc_file (int pid, struct procinfo *pip, int mode) |
| 3907 | |
| 3908 | DESCRIPTION |
| 3909 | |
| 3910 | Given a process id and a mode, close the existing open /proc |
| 3911 | entry (if any) and open one for the new process id, in the |
| 3912 | specified mode. Once it is open, then mark the local process |
| 3913 | information structure as valid, which guarantees that the pid, |
| 3914 | fd, and pathname fields match an open /proc entry. Returns |
| 3915 | zero if the open fails, nonzero otherwise. |
| 3916 | |
| 3917 | Note that the pathname is left intact, even when the open fails, |
| 3918 | so that callers can use it to construct meaningful error messages |
| 3919 | rather than just "file open failed". |
| 3920 | |
| 3921 | Note that for Solaris, the process-id also includes an LWP-id, so we |
| 3922 | actually attempt to open that. If we are handed a pid with a 0 LWP-id, |
| 3923 | then we will ask the kernel what it is and add it to the pid. Hence, |
| 3924 | the pid can be changed by us. |
| 3925 | */ |
| 3926 | |
| 3927 | static int |
| 3928 | open_proc_file (pid, pip, mode, control) |
| 3929 | int pid; |
| 3930 | struct procinfo *pip; |
| 3931 | int mode; |
| 3932 | int control; |
| 3933 | { |
| 3934 | int tmp, tmpfd; |
| 3935 | |
| 3936 | pip -> next = NULL; |
| 3937 | pip -> had_event = 0; |
| 3938 | pip -> pathname = xmalloc (MAX_PROC_NAME_SIZE); |
| 3939 | pip -> pid = pid; |
| 3940 | |
| 3941 | #ifndef PIOCOPENLWP |
| 3942 | tmp = pid; |
| 3943 | #else |
| 3944 | tmp = pid & 0xffff; |
| 3945 | #endif |
| 3946 | |
| 3947 | #ifdef HAVE_MULTIPLE_PROC_FDS |
| 3948 | sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp); |
| 3949 | if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0) |
| 3950 | { |
| 3951 | return 0; |
| 3952 | } |
| 3953 | |
| 3954 | sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp); |
| 3955 | if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0) |
| 3956 | { |
| 3957 | close (pip->status_fd); |
| 3958 | return 0; |
| 3959 | } |
| 3960 | |
| 3961 | sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp); |
| 3962 | if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0) |
| 3963 | { |
| 3964 | close (pip->status_fd); |
| 3965 | close (pip->as_fd); |
| 3966 | return 0; |
| 3967 | } |
| 3968 | |
| 3969 | sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp); |
| 3970 | if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0) |
| 3971 | { |
| 3972 | close (pip->status_fd); |
| 3973 | close (pip->as_fd); |
| 3974 | return 0; |
| 3975 | } |
| 3976 | |
| 3977 | if (control) |
| 3978 | { |
| 3979 | sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp); |
| 3980 | if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0) |
| 3981 | { |
| 3982 | close (pip->status_fd); |
| 3983 | close (pip->as_fd); |
| 3984 | close (pip->map_fd); |
| 3985 | return 0; |
| 3986 | } |
| 3987 | } |
| 3988 | |
| 3989 | #else /* HAVE_MULTIPLE_PROC_FDS */ |
| 3990 | sprintf (pip -> pathname, CTL_PROC_NAME_FMT, tmp); |
| 3991 | |
| 3992 | if ((tmpfd = open (pip -> pathname, mode)) < 0) |
| 3993 | return 0; |
| 3994 | |
| 3995 | #ifndef PIOCOPENLWP |
| 3996 | pip -> ctl_fd = tmpfd; |
| 3997 | pip -> as_fd = tmpfd; |
| 3998 | pip -> map_fd = tmpfd; |
| 3999 | pip -> status_fd = tmpfd; |
| 4000 | #else |
| 4001 | tmp = (pid >> 16) & 0xffff; /* Extract thread id */ |
| 4002 | |
| 4003 | if (tmp == 0) |
| 4004 | { /* Don't know thread id yet */ |
| 4005 | if (ioctl (tmpfd, PIOCSTATUS, &pip -> prstatus) < 0) |
| 4006 | { |
| 4007 | print_sys_errmsg (pip -> pathname, errno); |
| 4008 | close (tmpfd); |
| 4009 | error ("open_proc_file: PIOCSTATUS failed"); |
| 4010 | } |
| 4011 | |
| 4012 | tmp = pip -> prstatus.pr_who; /* Get thread id from prstatus_t */ |
| 4013 | pip -> pid = (tmp << 16) | pid; /* Update pip */ |
| 4014 | } |
| 4015 | |
| 4016 | if ((pip -> ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0) |
| 4017 | { |
| 4018 | close (tmpfd); |
| 4019 | return 0; |
| 4020 | } |
| 4021 | |
| 4022 | #ifdef PIOCSET /* New method */ |
| 4023 | { |
| 4024 | long pr_flags; |
| 4025 | pr_flags = PR_ASYNC; |
| 4026 | ioctl (pip -> ctl_fd, PIOCSET, &pr_flags); |
| 4027 | } |
| 4028 | #endif |
| 4029 | |
| 4030 | /* keep extra fds in sync */ |
| 4031 | pip->as_fd = pip->ctl_fd; |
| 4032 | pip->map_fd = pip->ctl_fd; |
| 4033 | pip->status_fd = pip->ctl_fd; |
| 4034 | |
| 4035 | close (tmpfd); /* All done with main pid */ |
| 4036 | #endif /* PIOCOPENLWP */ |
| 4037 | |
| 4038 | #endif /* HAVE_MULTIPLE_PROC_FDS */ |
| 4039 | |
| 4040 | return 1; |
| 4041 | } |
| 4042 | |
| 4043 | static char * |
| 4044 | mappingflags (flags) |
| 4045 | long flags; |
| 4046 | { |
| 4047 | static char asciiflags[8]; |
| 4048 | |
| 4049 | strcpy (asciiflags, "-------"); |
| 4050 | #if defined (MA_PHYS) |
| 4051 | if (flags & MA_PHYS) asciiflags[0] = 'd'; |
| 4052 | #endif |
| 4053 | if (flags & MA_STACK) asciiflags[1] = 's'; |
| 4054 | if (flags & MA_BREAK) asciiflags[2] = 'b'; |
| 4055 | if (flags & MA_SHARED) asciiflags[3] = 's'; |
| 4056 | if (flags & MA_READ) asciiflags[4] = 'r'; |
| 4057 | if (flags & MA_WRITE) asciiflags[5] = 'w'; |
| 4058 | if (flags & MA_EXEC) asciiflags[6] = 'x'; |
| 4059 | return (asciiflags); |
| 4060 | } |
| 4061 | |
| 4062 | static void |
| 4063 | info_proc_flags (pip, summary) |
| 4064 | struct procinfo *pip; |
| 4065 | int summary; |
| 4066 | { |
| 4067 | struct trans *transp; |
| 4068 | #ifdef UNIXWARE |
| 4069 | long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags; |
| 4070 | #else |
| 4071 | long flags = pip->prstatus.pr_flags; |
| 4072 | #endif |
| 4073 | |
| 4074 | printf_filtered ("%-32s", "Process status flags:"); |
| 4075 | if (!summary) |
| 4076 | { |
| 4077 | printf_filtered ("\n\n"); |
| 4078 | } |
| 4079 | for (transp = pr_flag_table; transp -> name != NULL; transp++) |
| 4080 | { |
| 4081 | if (flags & transp -> value) |
| 4082 | { |
| 4083 | if (summary) |
| 4084 | { |
| 4085 | printf_filtered ("%s ", transp -> name); |
| 4086 | } |
| 4087 | else |
| 4088 | { |
| 4089 | printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc); |
| 4090 | } |
| 4091 | } |
| 4092 | } |
| 4093 | printf_filtered ("\n"); |
| 4094 | } |
| 4095 | |
| 4096 | static void |
| 4097 | info_proc_stop (pip, summary) |
| 4098 | struct procinfo *pip; |
| 4099 | int summary; |
| 4100 | { |
| 4101 | struct trans *transp; |
| 4102 | int why; |
| 4103 | int what; |
| 4104 | |
| 4105 | #ifdef UNIXWARE |
| 4106 | why = pip -> prstatus.pr_lwp.pr_why; |
| 4107 | what = pip -> prstatus.pr_lwp.pr_what; |
| 4108 | #else |
| 4109 | why = pip -> prstatus.pr_why; |
| 4110 | what = pip -> prstatus.pr_what; |
| 4111 | #endif |
| 4112 | |
| 4113 | #ifdef UNIXWARE |
| 4114 | if (pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED) |
| 4115 | #else |
| 4116 | if (pip -> prstatus.pr_flags & PR_STOPPED) |
| 4117 | #endif |
| 4118 | { |
| 4119 | printf_filtered ("%-32s", "Reason for stopping:"); |
| 4120 | if (!summary) |
| 4121 | { |
| 4122 | printf_filtered ("\n\n"); |
| 4123 | } |
| 4124 | for (transp = pr_why_table; transp -> name != NULL; transp++) |
| 4125 | { |
| 4126 | if (why == transp -> value) |
| 4127 | { |
| 4128 | if (summary) |
| 4129 | { |
| 4130 | printf_filtered ("%s ", transp -> name); |
| 4131 | } |
| 4132 | else |
| 4133 | { |
| 4134 | printf_filtered ("\t%-16s %s.\n", |
| 4135 | transp -> name, transp -> desc); |
| 4136 | } |
| 4137 | break; |
| 4138 | } |
| 4139 | } |
| 4140 | |
| 4141 | /* Use the pr_why field to determine what the pr_what field means, and |
| 4142 | print more information. */ |
| 4143 | |
| 4144 | switch (why) |
| 4145 | { |
| 4146 | case PR_REQUESTED: |
| 4147 | /* pr_what is unused for this case */ |
| 4148 | break; |
| 4149 | case PR_JOBCONTROL: |
| 4150 | case PR_SIGNALLED: |
| 4151 | if (summary) |
| 4152 | { |
| 4153 | printf_filtered ("%s ", signalname (what)); |
| 4154 | } |
| 4155 | else |
| 4156 | { |
| 4157 | printf_filtered ("\t%-16s %s.\n", signalname (what), |
| 4158 | safe_strsignal (what)); |
| 4159 | } |
| 4160 | break; |
| 4161 | case PR_SYSENTRY: |
| 4162 | if (summary) |
| 4163 | { |
| 4164 | printf_filtered ("%s ", syscallname (what)); |
| 4165 | } |
| 4166 | else |
| 4167 | { |
| 4168 | printf_filtered ("\t%-16s %s.\n", syscallname (what), |
| 4169 | "Entered this system call"); |
| 4170 | } |
| 4171 | break; |
| 4172 | case PR_SYSEXIT: |
| 4173 | if (summary) |
| 4174 | { |
| 4175 | printf_filtered ("%s ", syscallname (what)); |
| 4176 | } |
| 4177 | else |
| 4178 | { |
| 4179 | printf_filtered ("\t%-16s %s.\n", syscallname (what), |
| 4180 | "Returned from this system call"); |
| 4181 | } |
| 4182 | break; |
| 4183 | case PR_FAULTED: |
| 4184 | if (summary) |
| 4185 | { |
| 4186 | printf_filtered ("%s ", |
| 4187 | lookupname (faults_table, what, "fault")); |
| 4188 | } |
| 4189 | else |
| 4190 | { |
| 4191 | printf_filtered ("\t%-16s %s.\n", |
| 4192 | lookupname (faults_table, what, "fault"), |
| 4193 | lookupdesc (faults_table, what)); |
| 4194 | } |
| 4195 | break; |
| 4196 | } |
| 4197 | printf_filtered ("\n"); |
| 4198 | } |
| 4199 | } |
| 4200 | |
| 4201 | static void |
| 4202 | info_proc_siginfo (pip, summary) |
| 4203 | struct procinfo *pip; |
| 4204 | int summary; |
| 4205 | { |
| 4206 | struct siginfo *sip; |
| 4207 | |
| 4208 | #ifdef UNIXWARE |
| 4209 | if ((pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED) && |
| 4210 | (pip -> prstatus.pr_lwp.pr_why == PR_SIGNALLED || |
| 4211 | pip -> prstatus.pr_lwp.pr_why == PR_FAULTED)) |
| 4212 | #else |
| 4213 | if ((pip -> prstatus.pr_flags & PR_STOPPED) && |
| 4214 | (pip -> prstatus.pr_why == PR_SIGNALLED || |
| 4215 | pip -> prstatus.pr_why == PR_FAULTED)) |
| 4216 | #endif |
| 4217 | { |
| 4218 | printf_filtered ("%-32s", "Additional signal/fault info:"); |
| 4219 | #ifdef UNIXWARE |
| 4220 | sip = &pip -> prstatus.pr_lwp.pr_info; |
| 4221 | #else |
| 4222 | sip = &pip -> prstatus.pr_info; |
| 4223 | #endif |
| 4224 | if (summary) |
| 4225 | { |
| 4226 | printf_filtered ("%s ", signalname (sip -> si_signo)); |
| 4227 | if (sip -> si_errno > 0) |
| 4228 | { |
| 4229 | printf_filtered ("%s ", errnoname (sip -> si_errno)); |
| 4230 | } |
| 4231 | if (sip -> si_code <= 0) |
| 4232 | { |
| 4233 | printf_filtered ("sent by %s, uid %d ", |
| 4234 | target_pid_to_str (sip -> si_pid), |
| 4235 | sip -> si_uid); |
| 4236 | } |
| 4237 | else |
| 4238 | { |
| 4239 | printf_filtered ("%s ", sigcodename (sip)); |
| 4240 | if ((sip -> si_signo == SIGILL) || |
| 4241 | (sip -> si_signo == SIGFPE) || |
| 4242 | (sip -> si_signo == SIGSEGV) || |
| 4243 | (sip -> si_signo == SIGBUS)) |
| 4244 | { |
| 4245 | printf_filtered ("addr=%#lx ", |
| 4246 | (unsigned long) sip -> si_addr); |
| 4247 | } |
| 4248 | else if ((sip -> si_signo == SIGCHLD)) |
| 4249 | { |
| 4250 | printf_filtered ("child %s, status %u ", |
| 4251 | target_pid_to_str (sip -> si_pid), |
| 4252 | sip -> si_status); |
| 4253 | } |
| 4254 | else if ((sip -> si_signo == SIGPOLL)) |
| 4255 | { |
| 4256 | printf_filtered ("band %u ", sip -> si_band); |
| 4257 | } |
| 4258 | } |
| 4259 | } |
| 4260 | else |
| 4261 | { |
| 4262 | printf_filtered ("\n\n"); |
| 4263 | printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo), |
| 4264 | safe_strsignal (sip -> si_signo)); |
| 4265 | if (sip -> si_errno > 0) |
| 4266 | { |
| 4267 | printf_filtered ("\t%-16s %s.\n", |
| 4268 | errnoname (sip -> si_errno), |
| 4269 | safe_strerror (sip -> si_errno)); |
| 4270 | } |
| 4271 | if (sip -> si_code <= 0) |
| 4272 | { |
| 4273 | printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */ |
| 4274 | "PID of process sending signal"); |
| 4275 | printf_filtered ("\t%-16u %s\n", sip -> si_uid, |
| 4276 | "UID of process sending signal"); |
| 4277 | } |
| 4278 | else |
| 4279 | { |
| 4280 | printf_filtered ("\t%-16s %s.\n", sigcodename (sip), |
| 4281 | sigcodedesc (sip)); |
| 4282 | if ((sip -> si_signo == SIGILL) || |
| 4283 | (sip -> si_signo == SIGFPE)) |
| 4284 | { |
| 4285 | printf_filtered ("\t%#-16lx %s.\n", |
| 4286 | (unsigned long) sip -> si_addr, |
| 4287 | "Address of faulting instruction"); |
| 4288 | } |
| 4289 | else if ((sip -> si_signo == SIGSEGV) || |
| 4290 | (sip -> si_signo == SIGBUS)) |
| 4291 | { |
| 4292 | printf_filtered ("\t%#-16lx %s.\n", |
| 4293 | (unsigned long) sip -> si_addr, |
| 4294 | "Address of faulting memory reference"); |
| 4295 | } |
| 4296 | else if ((sip -> si_signo == SIGCHLD)) |
| 4297 | { |
| 4298 | printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */ |
| 4299 | "Child process ID"); |
| 4300 | printf_filtered ("\t%-16u %s.\n", sip -> si_status, |
| 4301 | "Child process exit value or signal"); |
| 4302 | } |
| 4303 | else if ((sip -> si_signo == SIGPOLL)) |
| 4304 | { |
| 4305 | printf_filtered ("\t%-16u %s.\n", sip -> si_band, |
| 4306 | "Band event for POLL_{IN,OUT,MSG}"); |
| 4307 | } |
| 4308 | } |
| 4309 | } |
| 4310 | printf_filtered ("\n"); |
| 4311 | } |
| 4312 | } |
| 4313 | |
| 4314 | static void |
| 4315 | info_proc_syscalls (pip, summary) |
| 4316 | struct procinfo *pip; |
| 4317 | int summary; |
| 4318 | { |
| 4319 | int syscallnum; |
| 4320 | |
| 4321 | if (!summary) |
| 4322 | { |
| 4323 | |
| 4324 | #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */ |
| 4325 | if (pip -> prstatus.pr_flags & PR_ASLEEP) |
| 4326 | { |
| 4327 | int syscallnum = pip -> prstatus.pr_reg[R_D0]; |
| 4328 | if (summary) |
| 4329 | { |
| 4330 | printf_filtered ("%-32s", "Sleeping in system call:"); |
| 4331 | printf_filtered ("%s", syscallname (syscallnum)); |
| 4332 | } |
| 4333 | else |
| 4334 | { |
| 4335 | printf_filtered ("Sleeping in system call '%s'.\n", |
| 4336 | syscallname (syscallnum)); |
| 4337 | } |
| 4338 | } |
| 4339 | #endif |
| 4340 | |
| 4341 | #ifndef UNIXWARE |
| 4342 | if (ioctl (pip -> ctl_fd, PIOCGENTRY, &pip -> entryset) < 0) |
| 4343 | { |
| 4344 | print_sys_errmsg (pip -> pathname, errno); |
| 4345 | error ("PIOCGENTRY failed"); |
| 4346 | } |
| 4347 | |
| 4348 | if (ioctl (pip -> ctl_fd, PIOCGEXIT, &pip -> exitset) < 0) |
| 4349 | { |
| 4350 | print_sys_errmsg (pip -> pathname, errno); |
| 4351 | error ("PIOCGEXIT failed"); |
| 4352 | } |
| 4353 | #endif |
| 4354 | |
| 4355 | printf_filtered ("System call tracing information:\n\n"); |
| 4356 | |
| 4357 | printf_filtered ("\t%-12s %-8s %-8s\n", |
| 4358 | "System call", |
| 4359 | "Entry", |
| 4360 | "Exit"); |
| 4361 | for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++) |
| 4362 | { |
| 4363 | QUIT; |
| 4364 | if (syscall_table[syscallnum] != NULL) |
| 4365 | printf_filtered ("\t%-12s ", syscall_table[syscallnum]); |
| 4366 | else |
| 4367 | printf_filtered ("\t%-12d ", syscallnum); |
| 4368 | |
| 4369 | #ifdef UNIXWARE |
| 4370 | printf_filtered ("%-8s ", |
| 4371 | prismember (&pip->prstatus.pr_sysentry, syscallnum) |
| 4372 | ? "on" : "off"); |
| 4373 | printf_filtered ("%-8s ", |
| 4374 | prismember (&pip->prstatus.pr_sysexit, syscallnum) |
| 4375 | ? "on" : "off"); |
| 4376 | #else |
| 4377 | printf_filtered ("%-8s ", |
| 4378 | prismember (&pip -> entryset, syscallnum) |
| 4379 | ? "on" : "off"); |
| 4380 | printf_filtered ("%-8s ", |
| 4381 | prismember (&pip -> exitset, syscallnum) |
| 4382 | ? "on" : "off"); |
| 4383 | #endif |
| 4384 | printf_filtered ("\n"); |
| 4385 | } |
| 4386 | printf_filtered ("\n"); |
| 4387 | } |
| 4388 | } |
| 4389 | |
| 4390 | static char * |
| 4391 | signalname (signo) |
| 4392 | int signo; |
| 4393 | { |
| 4394 | const char *name; |
| 4395 | static char locbuf[32]; |
| 4396 | |
| 4397 | name = strsigno (signo); |
| 4398 | if (name == NULL) |
| 4399 | { |
| 4400 | sprintf (locbuf, "Signal %d", signo); |
| 4401 | } |
| 4402 | else |
| 4403 | { |
| 4404 | sprintf (locbuf, "%s (%d)", name, signo); |
| 4405 | } |
| 4406 | return (locbuf); |
| 4407 | } |
| 4408 | |
| 4409 | static char * |
| 4410 | errnoname (errnum) |
| 4411 | int errnum; |
| 4412 | { |
| 4413 | const char *name; |
| 4414 | static char locbuf[32]; |
| 4415 | |
| 4416 | name = strerrno (errnum); |
| 4417 | if (name == NULL) |
| 4418 | { |
| 4419 | sprintf (locbuf, "Errno %d", errnum); |
| 4420 | } |
| 4421 | else |
| 4422 | { |
| 4423 | sprintf (locbuf, "%s (%d)", name, errnum); |
| 4424 | } |
| 4425 | return (locbuf); |
| 4426 | } |
| 4427 | |
| 4428 | static void |
| 4429 | info_proc_signals (pip, summary) |
| 4430 | struct procinfo *pip; |
| 4431 | int summary; |
| 4432 | { |
| 4433 | int signo; |
| 4434 | |
| 4435 | if (!summary) |
| 4436 | { |
| 4437 | #ifndef PROCFS_USE_READ_WRITE |
| 4438 | if (ioctl (pip -> ctl_fd, PIOCGTRACE, &pip -> trace) < 0) |
| 4439 | { |
| 4440 | print_sys_errmsg (pip -> pathname, errno); |
| 4441 | error ("PIOCGTRACE failed"); |
| 4442 | } |
| 4443 | #endif |
| 4444 | |
| 4445 | printf_filtered ("Disposition of signals:\n\n"); |
| 4446 | printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n", |
| 4447 | "Signal", "Trace", "Hold", "Pending", "Description"); |
| 4448 | for (signo = 0; signo < NSIG; signo++) |
| 4449 | { |
| 4450 | QUIT; |
| 4451 | printf_filtered ("\t%-15s ", signalname (signo)); |
| 4452 | #ifdef UNIXWARE |
| 4453 | printf_filtered ("%-8s ", |
| 4454 | prismember (&pip -> prstatus.pr_sigtrace, signo) |
| 4455 | ? "on" : "off"); |
| 4456 | printf_filtered ("%-8s ", |
| 4457 | prismember (&pip -> prstatus.pr_lwp.pr_context.uc_sigmask, signo) |
| 4458 | ? "on" : "off"); |
| 4459 | #else |
| 4460 | printf_filtered ("%-8s ", |
| 4461 | prismember (&pip -> trace, signo) |
| 4462 | ? "on" : "off"); |
| 4463 | printf_filtered ("%-8s ", |
| 4464 | prismember (&pip -> prstatus.pr_sighold, signo) |
| 4465 | ? "on" : "off"); |
| 4466 | #endif |
| 4467 | |
| 4468 | #ifdef UNIXWARE |
| 4469 | if (prismember (&pip->prstatus.pr_sigpend, signo) || |
| 4470 | prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo)) |
| 4471 | printf_filtered("%-8s ", "yes"); |
| 4472 | else |
| 4473 | printf_filtered("%-8s ", "no"); |
| 4474 | #else /* UNIXWARE */ |
| 4475 | #ifdef PROCFS_SIGPEND_OFFSET |
| 4476 | /* Alpha OSF/1 numbers the pending signals from 1. */ |
| 4477 | printf_filtered ("%-8s ", |
| 4478 | (signo ? prismember (&pip -> prstatus.pr_sigpend, |
| 4479 | signo - 1) |
| 4480 | : 0) |
| 4481 | ? "yes" : "no"); |
| 4482 | #else |
| 4483 | printf_filtered ("%-8s ", |
| 4484 | prismember (&pip -> prstatus.pr_sigpend, signo) |
| 4485 | ? "yes" : "no"); |
| 4486 | #endif |
| 4487 | #endif /* UNIXWARE */ |
| 4488 | printf_filtered (" %s\n", safe_strsignal (signo)); |
| 4489 | } |
| 4490 | printf_filtered ("\n"); |
| 4491 | } |
| 4492 | } |
| 4493 | |
| 4494 | static void |
| 4495 | info_proc_faults (pip, summary) |
| 4496 | struct procinfo *pip; |
| 4497 | int summary; |
| 4498 | { |
| 4499 | struct trans *transp; |
| 4500 | |
| 4501 | if (!summary) |
| 4502 | { |
| 4503 | #ifndef UNIXWARE |
| 4504 | if (ioctl (pip -> ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0) |
| 4505 | { |
| 4506 | print_sys_errmsg (pip -> pathname, errno); |
| 4507 | error ("PIOCGFAULT failed"); |
| 4508 | } |
| 4509 | #endif |
| 4510 | |
| 4511 | printf_filtered ("Current traced hardware fault set:\n\n"); |
| 4512 | printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace"); |
| 4513 | |
| 4514 | for (transp = faults_table; transp -> name != NULL; transp++) |
| 4515 | { |
| 4516 | QUIT; |
| 4517 | printf_filtered ("\t%-12s ", transp -> name); |
| 4518 | #ifdef UNIXWARE |
| 4519 | printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp -> value) |
| 4520 | ? "on" : "off"); |
| 4521 | #else |
| 4522 | printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp -> value) |
| 4523 | ? "on" : "off"); |
| 4524 | #endif |
| 4525 | printf_filtered ("\n"); |
| 4526 | } |
| 4527 | printf_filtered ("\n"); |
| 4528 | } |
| 4529 | } |
| 4530 | |
| 4531 | static void |
| 4532 | info_proc_mappings (pip, summary) |
| 4533 | struct procinfo *pip; |
| 4534 | int summary; |
| 4535 | { |
| 4536 | int nmap; |
| 4537 | struct prmap *prmaps; |
| 4538 | struct prmap *prmap; |
| 4539 | struct stat sbuf; |
| 4540 | |
| 4541 | if (!summary) |
| 4542 | { |
| 4543 | printf_filtered ("Mapped address spaces:\n\n"); |
| 4544 | #ifdef BFD_HOST_64_BIT |
| 4545 | printf_filtered (" %18s %18s %10s %10s %7s\n", |
| 4546 | #else |
| 4547 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
| 4548 | #endif |
| 4549 | "Start Addr", |
| 4550 | " End Addr", |
| 4551 | " Size", |
| 4552 | " Offset", |
| 4553 | "Flags"); |
| 4554 | #ifdef PROCFS_USE_READ_WRITE |
| 4555 | if (fstat (pip->map_fd, &sbuf) == 0) |
| 4556 | { |
| 4557 | nmap = sbuf.st_size / sizeof (prmap_t); |
| 4558 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 4559 | if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) && |
| 4560 | (read (pip->map_fd, (char *) prmaps, |
| 4561 | nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps)))) |
| 4562 | { |
| 4563 | int i = 0; |
| 4564 | for (prmap = prmaps; i < nmap; ++prmap, ++i) |
| 4565 | #else |
| 4566 | if (ioctl (pip -> ctl_fd, PIOCNMAP, &nmap) == 0) |
| 4567 | { |
| 4568 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 4569 | if (ioctl (pip -> ctl_fd, PIOCMAP, prmaps) == 0) |
| 4570 | { |
| 4571 | for (prmap = prmaps; prmap -> pr_size; ++prmap) |
| 4572 | #endif /* PROCFS_USE_READ_WRITE */ |
| 4573 | { |
| 4574 | #ifdef BFD_HOST_64_BIT |
| 4575 | printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n", |
| 4576 | #else |
| 4577 | printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n", |
| 4578 | #endif |
| 4579 | (unsigned long)prmap -> pr_vaddr, |
| 4580 | (unsigned long)prmap -> pr_vaddr |
| 4581 | + prmap -> pr_size - 1, |
| 4582 | prmap -> pr_size, |
| 4583 | prmap -> pr_off, |
| 4584 | mappingflags (prmap -> pr_mflags)); |
| 4585 | } |
| 4586 | } |
| 4587 | } |
| 4588 | printf_filtered ("\n"); |
| 4589 | } |
| 4590 | } |
| 4591 | |
| 4592 | /* |
| 4593 | |
| 4594 | LOCAL FUNCTION |
| 4595 | |
| 4596 | info_proc -- implement the "info proc" command |
| 4597 | |
| 4598 | SYNOPSIS |
| 4599 | |
| 4600 | void info_proc (char *args, int from_tty) |
| 4601 | |
| 4602 | DESCRIPTION |
| 4603 | |
| 4604 | Implement gdb's "info proc" command by using the /proc interface |
| 4605 | to print status information about any currently running process. |
| 4606 | |
| 4607 | Examples of the use of "info proc" are: |
| 4608 | |
| 4609 | info proc (prints summary info for current inferior) |
| 4610 | info proc 123 (prints summary info for process with pid 123) |
| 4611 | info proc mappings (prints address mappings) |
| 4612 | info proc times (prints process/children times) |
| 4613 | info proc id (prints pid, ppid, gid, sid, etc) |
| 4614 | FIXME: i proc id not implemented. |
| 4615 | info proc status (prints general process state info) |
| 4616 | FIXME: i proc status not implemented. |
| 4617 | info proc signals (prints info about signal handling) |
| 4618 | info proc all (prints all info) |
| 4619 | |
| 4620 | */ |
| 4621 | |
| 4622 | static void |
| 4623 | info_proc (args, from_tty) |
| 4624 | char *args; |
| 4625 | int from_tty; |
| 4626 | { |
| 4627 | int pid; |
| 4628 | struct procinfo *pip; |
| 4629 | struct cleanup *old_chain; |
| 4630 | char **argv; |
| 4631 | int argsize; |
| 4632 | int summary = 1; |
| 4633 | int flags = 0; |
| 4634 | int syscalls = 0; |
| 4635 | int signals = 0; |
| 4636 | int faults = 0; |
| 4637 | int mappings = 0; |
| 4638 | int times = 0; |
| 4639 | int id = 0; |
| 4640 | int status = 0; |
| 4641 | int all = 0; |
| 4642 | int nlwp; |
| 4643 | int *lwps; |
| 4644 | |
| 4645 | old_chain = make_cleanup (null_cleanup, 0); |
| 4646 | |
| 4647 | /* Default to using the current inferior if no pid specified. Note |
| 4648 | that inferior_pid may be 0, hence we set okerr. */ |
| 4649 | |
| 4650 | pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */ |
| 4651 | if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */ |
| 4652 | pip = procinfo_list; /* take first available */ |
| 4653 | pid = pid & 0xffff; /* extract "real" pid */ |
| 4654 | |
| 4655 | if (args != NULL) |
| 4656 | { |
| 4657 | if ((argv = buildargv (args)) == NULL) |
| 4658 | { |
| 4659 | nomem (0); |
| 4660 | } |
| 4661 | make_cleanup (freeargv, (char *) argv); |
| 4662 | |
| 4663 | while (*argv != NULL) |
| 4664 | { |
| 4665 | argsize = strlen (*argv); |
| 4666 | if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0) |
| 4667 | { |
| 4668 | summary = 0; |
| 4669 | all = 1; |
| 4670 | } |
| 4671 | else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0) |
| 4672 | { |
| 4673 | summary = 0; |
| 4674 | faults = 1; |
| 4675 | } |
| 4676 | else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0) |
| 4677 | { |
| 4678 | summary = 0; |
| 4679 | flags = 1; |
| 4680 | } |
| 4681 | else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0) |
| 4682 | { |
| 4683 | summary = 0; |
| 4684 | id = 1; |
| 4685 | } |
| 4686 | else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0) |
| 4687 | { |
| 4688 | summary = 0; |
| 4689 | mappings = 1; |
| 4690 | } |
| 4691 | else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0) |
| 4692 | { |
| 4693 | summary = 0; |
| 4694 | signals = 1; |
| 4695 | } |
| 4696 | else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0) |
| 4697 | { |
| 4698 | summary = 0; |
| 4699 | status = 1; |
| 4700 | } |
| 4701 | else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0) |
| 4702 | { |
| 4703 | summary = 0; |
| 4704 | syscalls = 1; |
| 4705 | } |
| 4706 | else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0) |
| 4707 | { |
| 4708 | summary = 0; |
| 4709 | times = 1; |
| 4710 | } |
| 4711 | else if ((pid = atoi (*argv)) > 0) |
| 4712 | { |
| 4713 | pip = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
| 4714 | memset (pip, 0, sizeof (*pip)); |
| 4715 | |
| 4716 | pip->pid = pid; |
| 4717 | if (!open_proc_file (pid, pip, O_RDONLY, 0)) |
| 4718 | { |
| 4719 | perror_with_name (pip -> pathname); |
| 4720 | /* NOTREACHED */ |
| 4721 | } |
| 4722 | pid = pip->pid; |
| 4723 | make_cleanup (close_proc_file, pip); |
| 4724 | } |
| 4725 | else if (**argv != '\000') |
| 4726 | { |
| 4727 | error ("Unrecognized or ambiguous keyword `%s'.", *argv); |
| 4728 | } |
| 4729 | argv++; |
| 4730 | } |
| 4731 | } |
| 4732 | |
| 4733 | /* If we don't have a valid open process at this point, then we have no |
| 4734 | inferior or didn't specify a specific pid. */ |
| 4735 | |
| 4736 | if (!pip) |
| 4737 | { |
| 4738 | error ("\ |
| 4739 | No process. Start debugging a program or specify an explicit process ID."); |
| 4740 | } |
| 4741 | |
| 4742 | if (!procfs_read_status (pip)) |
| 4743 | { |
| 4744 | print_sys_errmsg (pip -> pathname, errno); |
| 4745 | error ("procfs_read_status failed"); |
| 4746 | } |
| 4747 | |
| 4748 | #ifndef PROCFS_USE_READ_WRITE |
| 4749 | #ifdef PIOCLWPIDS |
| 4750 | nlwp = pip->prstatus.pr_nlwp; |
| 4751 | lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps)); |
| 4752 | |
| 4753 | if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps)) |
| 4754 | { |
| 4755 | print_sys_errmsg (pip -> pathname, errno); |
| 4756 | error ("PIOCLWPIDS failed"); |
| 4757 | } |
| 4758 | #else /* PIOCLWPIDS */ |
| 4759 | nlwp = 1; |
| 4760 | lwps = alloca ((2 * nlwp + 2) * sizeof *lwps); |
| 4761 | lwps[0] = 0; |
| 4762 | #endif /* PIOCLWPIDS */ |
| 4763 | |
| 4764 | for (; nlwp > 0; nlwp--, lwps++) |
| 4765 | { |
| 4766 | pip = find_procinfo ((*lwps << 16) | pid, 1); |
| 4767 | |
| 4768 | if (!pip) |
| 4769 | { |
| 4770 | pip = (struct procinfo *) xmalloc (sizeof (struct procinfo)); |
| 4771 | memset (pip, 0, sizeof (*pip)); |
| 4772 | if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0)) |
| 4773 | continue; |
| 4774 | |
| 4775 | make_cleanup (close_proc_file, pip); |
| 4776 | |
| 4777 | if (!procfs_read_status (pip)) |
| 4778 | { |
| 4779 | print_sys_errmsg (pip -> pathname, errno); |
| 4780 | error ("procfs_read_status failed"); |
| 4781 | } |
| 4782 | } |
| 4783 | |
| 4784 | #endif /* PROCFS_USE_READ_WRITE */ |
| 4785 | |
| 4786 | /* Print verbose information of the requested type(s), or just a summary |
| 4787 | of the information for all types. */ |
| 4788 | |
| 4789 | printf_filtered ("\nInformation for %s.%d:\n\n", pip -> pathname, *lwps); |
| 4790 | if (summary || all || flags) |
| 4791 | { |
| 4792 | info_proc_flags (pip, summary); |
| 4793 | } |
| 4794 | if (summary || all) |
| 4795 | { |
| 4796 | info_proc_stop (pip, summary); |
| 4797 | supply_gregset (&pip->prstatus.pr_reg); |
| 4798 | printf_filtered ("PC: "); |
| 4799 | print_address (read_pc (), gdb_stdout); |
| 4800 | printf_filtered ("\n"); |
| 4801 | } |
| 4802 | if (summary || all || signals || faults) |
| 4803 | { |
| 4804 | info_proc_siginfo (pip, summary); |
| 4805 | } |
| 4806 | if (summary || all || syscalls) |
| 4807 | { |
| 4808 | info_proc_syscalls (pip, summary); |
| 4809 | } |
| 4810 | if (summary || all || mappings) |
| 4811 | { |
| 4812 | info_proc_mappings (pip, summary); |
| 4813 | } |
| 4814 | if (summary || all || signals) |
| 4815 | { |
| 4816 | info_proc_signals (pip, summary); |
| 4817 | } |
| 4818 | if (summary || all || faults) |
| 4819 | { |
| 4820 | info_proc_faults (pip, summary); |
| 4821 | } |
| 4822 | printf_filtered ("\n"); |
| 4823 | |
| 4824 | /* All done, deal with closing any temporary process info structure, |
| 4825 | freeing temporary memory , etc. */ |
| 4826 | |
| 4827 | do_cleanups (old_chain); |
| 4828 | #ifndef PROCFS_USE_READ_WRITE |
| 4829 | } |
| 4830 | #endif |
| 4831 | } |
| 4832 | |
| 4833 | /* |
| 4834 | |
| 4835 | LOCAL FUNCTION |
| 4836 | |
| 4837 | modify_inherit_on_fork_flag - Change the inherit-on-fork flag |
| 4838 | |
| 4839 | SYNOPSIS |
| 4840 | |
| 4841 | void modify_inherit_on_fork_flag (fd, flag) |
| 4842 | |
| 4843 | DESCRIPTION |
| 4844 | |
| 4845 | Call this routine to modify the inherit-on-fork flag. This routine is |
| 4846 | just a nice wrapper to hide the #ifdefs needed by various systems to |
| 4847 | control this flag. |
| 4848 | |
| 4849 | */ |
| 4850 | |
| 4851 | static void |
| 4852 | modify_inherit_on_fork_flag (fd, flag) |
| 4853 | int fd; |
| 4854 | int flag; |
| 4855 | { |
| 4856 | #if defined (PIOCSET) || defined (PCSET) |
| 4857 | long pr_flags; |
| 4858 | #endif |
| 4859 | int retval = 0; |
| 4860 | struct proc_ctl pctl; |
| 4861 | |
| 4862 | #if defined (PIOCSET) || defined (PCSET) /* New method */ |
| 4863 | pr_flags = PR_FORK; |
| 4864 | if (flag) |
| 4865 | { |
| 4866 | #ifdef PROCFS_USE_READ_WRITE |
| 4867 | pctl.cmd = PCSET; |
| 4868 | pctl.data = PR_FORK; |
| 4869 | if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) |
| 4870 | retval = -1; |
| 4871 | #else |
| 4872 | retval = ioctl (fd, PIOCSET, &pr_flags); |
| 4873 | #endif |
| 4874 | } |
| 4875 | else |
| 4876 | { |
| 4877 | #ifdef PROCFS_USE_READ_WRITE |
| 4878 | pctl.cmd = PCRESET; |
| 4879 | pctl.data = PR_FORK; |
| 4880 | if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) |
| 4881 | retval = -1; |
| 4882 | #else |
| 4883 | retval = ioctl (fd, PIOCRESET, &pr_flags); |
| 4884 | #endif |
| 4885 | } |
| 4886 | |
| 4887 | #else |
| 4888 | #ifdef PIOCSFORK /* Original method */ |
| 4889 | if (flag) |
| 4890 | { |
| 4891 | retval = ioctl (fd, PIOCSFORK, NULL); |
| 4892 | } |
| 4893 | else |
| 4894 | { |
| 4895 | retval = ioctl (fd, PIOCRFORK, NULL); |
| 4896 | } |
| 4897 | #else |
| 4898 | Neither PR_FORK nor PIOCSFORK exist!!! |
| 4899 | #endif |
| 4900 | #endif |
| 4901 | |
| 4902 | if (!retval) |
| 4903 | return; |
| 4904 | |
| 4905 | print_sys_errmsg ("modify_inherit_on_fork_flag", errno); |
| 4906 | error ("PIOCSFORK or PR_FORK modification failed"); |
| 4907 | } |
| 4908 | |
| 4909 | /* |
| 4910 | |
| 4911 | LOCAL FUNCTION |
| 4912 | |
| 4913 | modify_run_on_last_close_flag - Change the run-on-last-close flag |
| 4914 | |
| 4915 | SYNOPSIS |
| 4916 | |
| 4917 | void modify_run_on_last_close_flag (fd, flag) |
| 4918 | |
| 4919 | DESCRIPTION |
| 4920 | |
| 4921 | Call this routine to modify the run-on-last-close flag. This routine |
| 4922 | is just a nice wrapper to hide the #ifdefs needed by various systems to |
| 4923 | control this flag. |
| 4924 | |
| 4925 | */ |
| 4926 | |
| 4927 | static void |
| 4928 | modify_run_on_last_close_flag (fd, flag) |
| 4929 | int fd; |
| 4930 | int flag; |
| 4931 | { |
| 4932 | #if defined (PIOCSET) || defined (PCSET) |
| 4933 | long pr_flags; |
| 4934 | #endif |
| 4935 | int retval = 0; |
| 4936 | struct proc_ctl pctl; |
| 4937 | |
| 4938 | #if defined (PIOCSET) || defined (PCSET) /* New method */ |
| 4939 | pr_flags = PR_RLC; |
| 4940 | if (flag) |
| 4941 | { |
| 4942 | #ifdef PROCFS_USE_READ_WRITE |
| 4943 | pctl.cmd = PCSET; |
| 4944 | pctl.data = PR_RLC; |
| 4945 | if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) |
| 4946 | retval = -1; |
| 4947 | #else |
| 4948 | retval = ioctl (fd, PIOCSET, &pr_flags); |
| 4949 | #endif |
| 4950 | } |
| 4951 | else |
| 4952 | { |
| 4953 | #ifdef PROCFS_USE_READ_WRITE |
| 4954 | pctl.cmd = PCRESET; |
| 4955 | pctl.data = PR_RLC; |
| 4956 | if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0) |
| 4957 | retval = -1; |
| 4958 | #else |
| 4959 | retval = ioctl (fd, PIOCRESET, &pr_flags); |
| 4960 | #endif |
| 4961 | } |
| 4962 | |
| 4963 | #else |
| 4964 | #ifdef PIOCSRLC /* Original method */ |
| 4965 | if (flag) |
| 4966 | retval = ioctl (fd, PIOCSRLC, NULL); |
| 4967 | else |
| 4968 | retval = ioctl (fd, PIOCRRLC, NULL); |
| 4969 | #else |
| 4970 | Neither PR_RLC nor PIOCSRLC exist!!! |
| 4971 | #endif |
| 4972 | #endif |
| 4973 | |
| 4974 | if (!retval) |
| 4975 | return; |
| 4976 | |
| 4977 | print_sys_errmsg ("modify_run_on_last_close_flag", errno); |
| 4978 | error ("PIOCSRLC or PR_RLC modification failed"); |
| 4979 | } |
| 4980 | |
| 4981 | /* |
| 4982 | |
| 4983 | LOCAL FUNCTION |
| 4984 | |
| 4985 | procfs_clear_syscall_trap -- Deletes the trap for the specified system call. |
| 4986 | |
| 4987 | SYNOPSIS |
| 4988 | |
| 4989 | void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok) |
| 4990 | |
| 4991 | DESCRIPTION |
| 4992 | |
| 4993 | This function function disables traps for the specified system call. |
| 4994 | errok is non-zero if errors should be ignored. |
| 4995 | */ |
| 4996 | |
| 4997 | static void |
| 4998 | procfs_clear_syscall_trap (pi, syscall_num, errok) |
| 4999 | struct procinfo *pi; |
| 5000 | int syscall_num; |
| 5001 | int errok; |
| 5002 | { |
| 5003 | sysset_t sysset; |
| 5004 | int goterr, i; |
| 5005 | |
| 5006 | goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0; |
| 5007 | |
| 5008 | if (goterr && !errok) |
| 5009 | { |
| 5010 | print_sys_errmsg (pi->pathname, errno); |
| 5011 | error ("PIOCGENTRY failed"); |
| 5012 | } |
| 5013 | |
| 5014 | if (!goterr) |
| 5015 | { |
| 5016 | prdelset (&sysset, syscall_num); |
| 5017 | |
| 5018 | if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok) |
| 5019 | { |
| 5020 | print_sys_errmsg (pi->pathname, errno); |
| 5021 | error ("PIOCSENTRY failed"); |
| 5022 | } |
| 5023 | } |
| 5024 | |
| 5025 | goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0; |
| 5026 | |
| 5027 | if (goterr && !errok) |
| 5028 | { |
| 5029 | procfs_clear_syscall_trap (pi, syscall_num, 1); |
| 5030 | print_sys_errmsg (pi->pathname, errno); |
| 5031 | error ("PIOCGEXIT failed"); |
| 5032 | } |
| 5033 | |
| 5034 | if (!goterr) |
| 5035 | { |
| 5036 | praddset (&sysset, syscall_num); |
| 5037 | |
| 5038 | if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok) |
| 5039 | { |
| 5040 | procfs_clear_syscall_trap (pi, syscall_num, 1); |
| 5041 | print_sys_errmsg (pi->pathname, errno); |
| 5042 | error ("PIOCSEXIT failed"); |
| 5043 | } |
| 5044 | } |
| 5045 | |
| 5046 | if (!pi->syscall_handlers) |
| 5047 | { |
| 5048 | if (!errok) |
| 5049 | error ("procfs_clear_syscall_trap: syscall_handlers is empty"); |
| 5050 | return; |
| 5051 | } |
| 5052 | |
| 5053 | /* Remove handler func from the handler list */ |
| 5054 | |
| 5055 | for (i = 0; i < pi->num_syscall_handlers; i++) |
| 5056 | if (pi->syscall_handlers[i].syscall_num == syscall_num) |
| 5057 | { |
| 5058 | if (i + 1 != pi->num_syscall_handlers) |
| 5059 | { /* Not the last entry. |
| 5060 | Move subsequent entries fwd. */ |
| 5061 | memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1], |
| 5062 | (pi->num_syscall_handlers - i - 1) |
| 5063 | * sizeof (struct procfs_syscall_handler)); |
| 5064 | } |
| 5065 | |
| 5066 | pi->syscall_handlers = xrealloc (pi->syscall_handlers, |
| 5067 | (pi->num_syscall_handlers - 1) |
| 5068 | * sizeof (struct procfs_syscall_handler)); |
| 5069 | pi->num_syscall_handlers--; |
| 5070 | return; |
| 5071 | } |
| 5072 | |
| 5073 | if (!errok) |
| 5074 | error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d", |
| 5075 | syscall_num); |
| 5076 | } |
| 5077 | |
| 5078 | /* |
| 5079 | |
| 5080 | LOCAL FUNCTION |
| 5081 | |
| 5082 | procfs_set_syscall_trap -- arrange for a function to be called when the |
| 5083 | child executes the specified system call. |
| 5084 | |
| 5085 | SYNOPSIS |
| 5086 | |
| 5087 | void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags, |
| 5088 | syscall_func_t *function) |
| 5089 | |
| 5090 | DESCRIPTION |
| 5091 | |
| 5092 | This function sets up an entry and/or exit trap for the specified system |
| 5093 | call. When the child executes the specified system call, your function |
| 5094 | will be called with the call #, a flag that indicates entry or exit, and |
| 5095 | pointers to rtnval and statval (which are used by procfs_wait). The |
| 5096 | function should return non-zero if something interesting happened, zero |
| 5097 | otherwise. |
| 5098 | */ |
| 5099 | |
| 5100 | static void |
| 5101 | procfs_set_syscall_trap (pi, syscall_num, flags, func) |
| 5102 | struct procinfo *pi; |
| 5103 | int syscall_num; |
| 5104 | int flags; |
| 5105 | syscall_func_t *func; |
| 5106 | { |
| 5107 | sysset_t sysset; |
| 5108 | |
| 5109 | if (flags & PROCFS_SYSCALL_ENTRY) |
| 5110 | { |
| 5111 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0) |
| 5112 | { |
| 5113 | print_sys_errmsg (pi->pathname, errno); |
| 5114 | error ("PIOCGENTRY failed"); |
| 5115 | } |
| 5116 | |
| 5117 | praddset (&sysset, syscall_num); |
| 5118 | |
| 5119 | if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) |
| 5120 | { |
| 5121 | print_sys_errmsg (pi->pathname, errno); |
| 5122 | error ("PIOCSENTRY failed"); |
| 5123 | } |
| 5124 | } |
| 5125 | |
| 5126 | if (flags & PROCFS_SYSCALL_EXIT) |
| 5127 | { |
| 5128 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0) |
| 5129 | { |
| 5130 | procfs_clear_syscall_trap (pi, syscall_num, 1); |
| 5131 | print_sys_errmsg (pi->pathname, errno); |
| 5132 | error ("PIOCGEXIT failed"); |
| 5133 | } |
| 5134 | |
| 5135 | praddset (&sysset, syscall_num); |
| 5136 | |
| 5137 | if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) |
| 5138 | { |
| 5139 | procfs_clear_syscall_trap (pi, syscall_num, 1); |
| 5140 | print_sys_errmsg (pi->pathname, errno); |
| 5141 | error ("PIOCSEXIT failed"); |
| 5142 | } |
| 5143 | } |
| 5144 | |
| 5145 | if (!pi->syscall_handlers) |
| 5146 | { |
| 5147 | pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler)); |
| 5148 | pi->syscall_handlers[0].syscall_num = syscall_num; |
| 5149 | pi->syscall_handlers[0].func = func; |
| 5150 | pi->num_syscall_handlers = 1; |
| 5151 | } |
| 5152 | else |
| 5153 | { |
| 5154 | int i; |
| 5155 | |
| 5156 | for (i = 0; i < pi->num_syscall_handlers; i++) |
| 5157 | if (pi->syscall_handlers[i].syscall_num == syscall_num) |
| 5158 | { |
| 5159 | pi->syscall_handlers[i].func = func; |
| 5160 | return; |
| 5161 | } |
| 5162 | |
| 5163 | pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1) |
| 5164 | * sizeof (struct procfs_syscall_handler)); |
| 5165 | pi->syscall_handlers[i].syscall_num = syscall_num; |
| 5166 | pi->syscall_handlers[i].func = func; |
| 5167 | pi->num_syscall_handlers++; |
| 5168 | } |
| 5169 | } |
| 5170 | |
| 5171 | #ifdef SYS_lwp_create |
| 5172 | |
| 5173 | /* |
| 5174 | |
| 5175 | LOCAL FUNCTION |
| 5176 | |
| 5177 | procfs_lwp_creation_handler - handle exit from the _lwp_create syscall |
| 5178 | |
| 5179 | SYNOPSIS |
| 5180 | |
| 5181 | int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 5182 | |
| 5183 | DESCRIPTION |
| 5184 | |
| 5185 | This routine is called both when an inferior process and it's new lwp |
| 5186 | are about to finish a _lwp_create() system call. This is the system |
| 5187 | call that Solaris uses to create a lightweight process. When the |
| 5188 | target process gets this event, we can look at sysarg[2] to find the |
| 5189 | new childs lwp ID, and create a procinfo struct from that. After that, |
| 5190 | we pretend that we got a SIGTRAP, and return non-zero to tell |
| 5191 | procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up, |
| 5192 | sees the new process and continues it. |
| 5193 | |
| 5194 | When we see the child exiting from lwp_create, we just contine it, |
| 5195 | since everything was handled when the parent trapped. |
| 5196 | |
| 5197 | NOTES |
| 5198 | In effect, we are only paying attention to the parent's completion of |
| 5199 | the lwp_create syscall. If we only paid attention to the child |
| 5200 | instead, then we wouldn't detect the creation of a suspended thread. |
| 5201 | */ |
| 5202 | |
| 5203 | static int |
| 5204 | procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp) |
| 5205 | struct procinfo *pi; |
| 5206 | int syscall_num; |
| 5207 | int why; |
| 5208 | int *rtnvalp; |
| 5209 | int *statvalp; |
| 5210 | { |
| 5211 | int lwp_id; |
| 5212 | struct procinfo *childpi; |
| 5213 | |
| 5214 | /* We've just detected the completion of an lwp_create system call. Now we |
| 5215 | need to setup a procinfo struct for this thread, and notify the thread |
| 5216 | system of the new arrival. */ |
| 5217 | |
| 5218 | /* If lwp_create failed, then nothing interesting happened. Continue the |
| 5219 | process and go back to sleep. */ |
| 5220 | |
| 5221 | if (pi->prstatus.pr_reg[R_PSR] & PS_FLAG_CARRY) |
| 5222 | { /* _lwp_create failed */ |
| 5223 | pi->prrun.pr_flags &= PRSTEP; |
| 5224 | pi->prrun.pr_flags |= PRCFAULT; |
| 5225 | |
| 5226 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) |
| 5227 | perror_with_name (pi->pathname); |
| 5228 | |
| 5229 | return 0; |
| 5230 | } |
| 5231 | |
| 5232 | /* At this point, the new thread is stopped at it's first instruction, and |
| 5233 | the parent is stopped at the exit from lwp_create. */ |
| 5234 | |
| 5235 | if (pi->new_child) /* Child? */ |
| 5236 | { /* Yes, just continue it */ |
| 5237 | pi->prrun.pr_flags &= PRSTEP; |
| 5238 | pi->prrun.pr_flags |= PRCFAULT; |
| 5239 | |
| 5240 | if ((pi->prstatus.pr_flags & PR_ISTOP) |
| 5241 | && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) |
| 5242 | perror_with_name (pi->pathname); |
| 5243 | |
| 5244 | pi->new_child = 0; /* No longer new */ |
| 5245 | |
| 5246 | return 0; |
| 5247 | } |
| 5248 | |
| 5249 | /* We're the proud parent of a new thread. Setup an exit trap for lwp_create |
| 5250 | in the child and continue the parent. */ |
| 5251 | |
| 5252 | /* Third arg is pointer to new thread id. */ |
| 5253 | lwp_id = read_memory_integer (pi->prstatus.pr_sysarg[2], sizeof (int)); |
| 5254 | |
| 5255 | lwp_id = (lwp_id << 16) | PIDGET (pi->pid); |
| 5256 | |
| 5257 | childpi = create_procinfo (lwp_id); |
| 5258 | |
| 5259 | /* The new process has actually inherited the lwp_create syscall trap from |
| 5260 | it's parent, but we still have to call this to register handlers for |
| 5261 | that child. */ |
| 5262 | |
| 5263 | procfs_set_inferior_syscall_traps (childpi); |
| 5264 | add_thread (lwp_id); |
| 5265 | printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id)); |
| 5266 | |
| 5267 | /* Continue the parent */ |
| 5268 | |
| 5269 | pi->prrun.pr_flags &= PRSTEP; |
| 5270 | pi->prrun.pr_flags |= PRCFAULT; |
| 5271 | if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0) |
| 5272 | perror_with_name (pi->pathname); |
| 5273 | |
| 5274 | /* The new child may have been created in one of two states: |
| 5275 | SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run. |
| 5276 | If suspended, we flag it to be continued later, when it has an event. */ |
| 5277 | |
| 5278 | if (childpi->prstatus.pr_why == PR_SUSPENDED) |
| 5279 | childpi->new_child = 1; /* Flag this as an unseen child process */ |
| 5280 | else |
| 5281 | { |
| 5282 | /* Continue the child */ |
| 5283 | childpi->prrun.pr_flags &= PRSTEP; |
| 5284 | childpi->prrun.pr_flags |= PRCFAULT; |
| 5285 | |
| 5286 | if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0) |
| 5287 | perror_with_name (childpi->pathname); |
| 5288 | } |
| 5289 | return 0; |
| 5290 | } |
| 5291 | #endif /* SYS_lwp_create */ |
| 5292 | |
| 5293 | /* Fork an inferior process, and start debugging it with /proc. */ |
| 5294 | |
| 5295 | static void |
| 5296 | procfs_create_inferior (exec_file, allargs, env) |
| 5297 | char *exec_file; |
| 5298 | char *allargs; |
| 5299 | char **env; |
| 5300 | { |
| 5301 | char *shell_file = getenv ("SHELL"); |
| 5302 | char *tryname; |
| 5303 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
| 5304 | { |
| 5305 | |
| 5306 | /* We will be looking down the PATH to find shell_file. If we |
| 5307 | just do this the normal way (via execlp, which operates by |
| 5308 | attempting an exec for each element of the PATH until it |
| 5309 | finds one which succeeds), then there will be an exec for |
| 5310 | each failed attempt, each of which will cause a PR_SYSEXIT |
| 5311 | stop, and we won't know how to distinguish the PR_SYSEXIT's |
| 5312 | for these failed execs with the ones for successful execs |
| 5313 | (whether the exec has succeeded is stored at that time in the |
| 5314 | carry bit or some such architecture-specific and |
| 5315 | non-ABI-specified place). |
| 5316 | |
| 5317 | So I can't think of anything better than to search the PATH |
| 5318 | now. This has several disadvantages: (1) There is a race |
| 5319 | condition; if we find a file now and it is deleted before we |
| 5320 | exec it, we lose, even if the deletion leaves a valid file |
| 5321 | further down in the PATH, (2) there is no way to know exactly |
| 5322 | what an executable (in the sense of "capable of being |
| 5323 | exec'd") file is. Using access() loses because it may lose |
| 5324 | if the caller is the superuser; failing to use it loses if |
| 5325 | there are ACLs or some such. */ |
| 5326 | |
| 5327 | char *p; |
| 5328 | char *p1; |
| 5329 | /* FIXME-maybe: might want "set path" command so user can change what |
| 5330 | path is used from within GDB. */ |
| 5331 | char *path = getenv ("PATH"); |
| 5332 | int len; |
| 5333 | struct stat statbuf; |
| 5334 | |
| 5335 | if (path == NULL) |
| 5336 | path = "/bin:/usr/bin"; |
| 5337 | |
| 5338 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); |
| 5339 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
| 5340 | { |
| 5341 | p1 = strchr (p, ':'); |
| 5342 | if (p1 != NULL) |
| 5343 | len = p1 - p; |
| 5344 | else |
| 5345 | len = strlen (p); |
| 5346 | strncpy (tryname, p, len); |
| 5347 | tryname[len] = '\0'; |
| 5348 | strcat (tryname, "/"); |
| 5349 | strcat (tryname, shell_file); |
| 5350 | if (access (tryname, X_OK) < 0) |
| 5351 | continue; |
| 5352 | if (stat (tryname, &statbuf) < 0) |
| 5353 | continue; |
| 5354 | if (!S_ISREG (statbuf.st_mode)) |
| 5355 | /* We certainly need to reject directories. I'm not quite |
| 5356 | as sure about FIFOs, sockets, etc., but I kind of doubt |
| 5357 | that people want to exec() these things. */ |
| 5358 | continue; |
| 5359 | break; |
| 5360 | } |
| 5361 | if (p == NULL) |
| 5362 | /* Not found. This must be an error rather than merely passing |
| 5363 | the file to execlp(), because execlp() would try all the |
| 5364 | exec()s, causing GDB to get confused. */ |
| 5365 | error ("Can't find shell %s in PATH", shell_file); |
| 5366 | |
| 5367 | shell_file = tryname; |
| 5368 | } |
| 5369 | |
| 5370 | fork_inferior (exec_file, allargs, env, |
| 5371 | proc_set_exec_trap, procfs_init_inferior, shell_file); |
| 5372 | |
| 5373 | /* We are at the first instruction we care about. */ |
| 5374 | /* Pedal to the metal... */ |
| 5375 | |
| 5376 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
| 5377 | } |
| 5378 | |
| 5379 | /* Clean up after the inferior dies. */ |
| 5380 | |
| 5381 | static void |
| 5382 | procfs_mourn_inferior () |
| 5383 | { |
| 5384 | struct procinfo *pi; |
| 5385 | struct procinfo *next_pi; |
| 5386 | |
| 5387 | for (pi = procinfo_list; pi; pi = next_pi) |
| 5388 | { |
| 5389 | next_pi = pi->next; |
| 5390 | unconditionally_kill_inferior (pi); |
| 5391 | } |
| 5392 | |
| 5393 | unpush_target (&procfs_ops); |
| 5394 | generic_mourn_inferior (); |
| 5395 | } |
| 5396 | |
| 5397 | |
| 5398 | /* Mark our target-struct as eligible for stray "run" and "attach" commands. */ |
| 5399 | static int |
| 5400 | procfs_can_run () |
| 5401 | { |
| 5402 | /* This variable is controlled by modules that sit atop procfs that may layer |
| 5403 | their own process structure atop that provided here. sol-thread.c does |
| 5404 | this because of the Solaris two-level thread model. */ |
| 5405 | |
| 5406 | return !procfs_suppress_run; |
| 5407 | } |
| 5408 | #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS |
| 5409 | \f |
| 5410 | /* Insert a watchpoint */ |
| 5411 | int |
| 5412 | procfs_set_watchpoint(pid, addr, len, rw) |
| 5413 | int pid; |
| 5414 | CORE_ADDR addr; |
| 5415 | int len; |
| 5416 | int rw; |
| 5417 | { |
| 5418 | struct procinfo *pi; |
| 5419 | prwatch_t wpt; |
| 5420 | |
| 5421 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); |
| 5422 | wpt.pr_vaddr = (caddr_t)addr; |
| 5423 | wpt.pr_size = len; |
| 5424 | wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0); |
| 5425 | if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0) |
| 5426 | { |
| 5427 | if (errno == E2BIG) |
| 5428 | return -1; |
| 5429 | /* Currently it sometimes happens that the same watchpoint gets |
| 5430 | deleted twice - don't die in this case (FIXME please) */ |
| 5431 | if (errno == ESRCH && len == 0) |
| 5432 | return 0; |
| 5433 | print_sys_errmsg (pi->pathname, errno); |
| 5434 | error ("PIOCSWATCH failed"); |
| 5435 | } |
| 5436 | return 0; |
| 5437 | } |
| 5438 | |
| 5439 | int |
| 5440 | procfs_stopped_by_watchpoint(pid) |
| 5441 | int pid; |
| 5442 | { |
| 5443 | struct procinfo *pi; |
| 5444 | short what; |
| 5445 | short why; |
| 5446 | |
| 5447 | pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0); |
| 5448 | if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) |
| 5449 | { |
| 5450 | why = pi->prstatus.pr_why; |
| 5451 | what = pi->prstatus.pr_what; |
| 5452 | if (why == PR_FAULTED |
| 5453 | #if defined (FLTWATCH) && defined (FLTKWATCH) |
| 5454 | && (what == FLTWATCH || what == FLTKWATCH) |
| 5455 | #else |
| 5456 | #ifdef FLTWATCH |
| 5457 | && (what == FLTWATCH) |
| 5458 | #endif |
| 5459 | #ifdef FLTKWATCH |
| 5460 | && (what == FLTKWATCH) |
| 5461 | #endif |
| 5462 | #endif |
| 5463 | ) |
| 5464 | return what; |
| 5465 | } |
| 5466 | return 0; |
| 5467 | } |
| 5468 | #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */ |
| 5469 | |
| 5470 | /* Why is this necessary? Shouldn't dead threads just be removed from the |
| 5471 | thread database? */ |
| 5472 | |
| 5473 | static int |
| 5474 | procfs_thread_alive (pid) |
| 5475 | int pid; |
| 5476 | { |
| 5477 | struct procinfo *pi, *next_pi; |
| 5478 | |
| 5479 | for (pi = procinfo_list; pi; pi = next_pi) |
| 5480 | { |
| 5481 | next_pi = pi->next; |
| 5482 | if (pi -> pid == pid) |
| 5483 | if (procfs_read_status (pi)) /* alive */ |
| 5484 | return 1; |
| 5485 | else /* defunct (exited) */ |
| 5486 | { |
| 5487 | close_proc_file (pi); |
| 5488 | return 0; |
| 5489 | } |
| 5490 | } |
| 5491 | return 0; |
| 5492 | } |
| 5493 | |
| 5494 | int |
| 5495 | procfs_first_available () |
| 5496 | { |
| 5497 | struct procinfo *pi; |
| 5498 | |
| 5499 | for (pi = procinfo_list; pi; pi = pi->next) |
| 5500 | { |
| 5501 | if (procfs_read_status (pi)) |
| 5502 | return pi->pid; |
| 5503 | } |
| 5504 | return -1; |
| 5505 | } |
| 5506 | |
| 5507 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 5508 | ^C on the controlling terminal. |
| 5509 | |
| 5510 | XXX - This may not be correct for all systems. Some may want to use |
| 5511 | killpg() instead of kill (-pgrp). */ |
| 5512 | |
| 5513 | static void |
| 5514 | procfs_stop () |
| 5515 | { |
| 5516 | extern pid_t inferior_process_group; |
| 5517 | |
| 5518 | kill (-inferior_process_group, SIGINT); |
| 5519 | } |
| 5520 | \f |
| 5521 | /* Convert a pid to printable form. */ |
| 5522 | |
| 5523 | #ifdef TIDGET |
| 5524 | char * |
| 5525 | procfs_pid_to_str (pid) |
| 5526 | int pid; |
| 5527 | { |
| 5528 | static char buf[100]; |
| 5529 | |
| 5530 | sprintf (buf, "Kernel thread %d", TIDGET (pid)); |
| 5531 | |
| 5532 | return buf; |
| 5533 | } |
| 5534 | #endif /* TIDGET */ |
| 5535 | \f |
| 5536 | struct target_ops procfs_ops = { |
| 5537 | "procfs", /* to_shortname */ |
| 5538 | "Unix /proc child process", /* to_longname */ |
| 5539 | "Unix /proc child process (started by the \"run\" command).", /* to_doc */ |
| 5540 | procfs_open, /* to_open */ |
| 5541 | 0, /* to_close */ |
| 5542 | procfs_attach, /* to_attach */ |
| 5543 | procfs_detach, /* to_detach */ |
| 5544 | procfs_resume, /* to_resume */ |
| 5545 | procfs_wait, /* to_wait */ |
| 5546 | procfs_fetch_registers, /* to_fetch_registers */ |
| 5547 | procfs_store_registers, /* to_store_registers */ |
| 5548 | procfs_prepare_to_store, /* to_prepare_to_store */ |
| 5549 | procfs_xfer_memory, /* to_xfer_memory */ |
| 5550 | procfs_files_info, /* to_files_info */ |
| 5551 | memory_insert_breakpoint, /* to_insert_breakpoint */ |
| 5552 | memory_remove_breakpoint, /* to_remove_breakpoint */ |
| 5553 | terminal_init_inferior, /* to_terminal_init */ |
| 5554 | terminal_inferior, /* to_terminal_inferior */ |
| 5555 | terminal_ours_for_output, /* to_terminal_ours_for_output */ |
| 5556 | terminal_ours, /* to_terminal_ours */ |
| 5557 | child_terminal_info, /* to_terminal_info */ |
| 5558 | procfs_kill_inferior, /* to_kill */ |
| 5559 | 0, /* to_load */ |
| 5560 | 0, /* to_lookup_symbol */ |
| 5561 | procfs_create_inferior, /* to_create_inferior */ |
| 5562 | procfs_mourn_inferior, /* to_mourn_inferior */ |
| 5563 | procfs_can_run, /* to_can_run */ |
| 5564 | procfs_notice_signals, /* to_notice_signals */ |
| 5565 | procfs_thread_alive, /* to_thread_alive */ |
| 5566 | procfs_stop, /* to_stop */ |
| 5567 | process_stratum, /* to_stratum */ |
| 5568 | 0, /* to_next */ |
| 5569 | 1, /* to_has_all_memory */ |
| 5570 | 1, /* to_has_memory */ |
| 5571 | 1, /* to_has_stack */ |
| 5572 | 1, /* to_has_registers */ |
| 5573 | 1, /* to_has_execution */ |
| 5574 | 0, /* sections */ |
| 5575 | 0, /* sections_end */ |
| 5576 | OPS_MAGIC /* to_magic */ |
| 5577 | }; |
| 5578 | |
| 5579 | void |
| 5580 | _initialize_procfs () |
| 5581 | { |
| 5582 | #ifdef HAVE_OPTIONAL_PROC_FS |
| 5583 | char procname[MAX_PROC_NAME_SIZE]; |
| 5584 | int fd; |
| 5585 | |
| 5586 | /* If we have an optional /proc filesystem (e.g. under OSF/1), |
| 5587 | don't add procfs support if we cannot access the running |
| 5588 | GDB via /proc. */ |
| 5589 | sprintf (procname, STATUS_PROC_NAME_FMT, getpid ()); |
| 5590 | if ((fd = open (procname, O_RDONLY)) < 0) |
| 5591 | return; |
| 5592 | close (fd); |
| 5593 | #endif |
| 5594 | |
| 5595 | add_target (&procfs_ops); |
| 5596 | |
| 5597 | add_info ("processes", info_proc, |
| 5598 | "Show process status information using /proc entry.\n\ |
| 5599 | Specify process id or use current inferior by default.\n\ |
| 5600 | Specify keywords for detailed information; default is summary.\n\ |
| 5601 | Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\ |
| 5602 | `status', `syscalls', and `times'.\n\ |
| 5603 | Unambiguous abbreviations may be used."); |
| 5604 | |
| 5605 | init_syscall_table (); |
| 5606 | } |