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