1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992-97, 1998 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs
4 compatibility by Geoffrey Noer at Cygnus Solutions.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 For information on the details of using /proc consult section proc(4)
26 in the UNIX System V Release 4 System Administrator's Reference Manual.
28 The general register and floating point register sets are manipulated
29 separately. This file makes the assumption that if FP0_REGNUM is
30 defined, then support for the floating point register set is desired,
31 regardless of whether or not the actual target has floating point hardware.
38 #include <sys/types.h>
40 #include <sys/fault.h>
41 #include <sys/syscall.h>
42 #include <sys/procfs.h>
45 #include "gdb_string.h"
55 #include "gdbthread.h"
57 #if !defined(SYS_lwp_create) && defined(SYS_lwpcreate)
58 # define SYS_lwp_create SYS_lwpcreate
61 #if !defined(SYS_lwp_exit) && defined(SYS_lwpexit)
62 # define SYS_lwp_exit SYS_lwpexit
65 #if !defined(SYS_lwp_wait) && defined(SYS_lwpwait)
66 # define SYS_lwp_wait SYS_lwpwait
69 #if !defined(SYS_lwp_self) && defined(SYS_lwpself)
70 # define SYS_lwp_self SYS_lwpself
73 #if !defined(SYS_lwp_info) && defined(SYS_lwpinfo)
74 # define SYS_lwp_info SYS_lwpinfo
77 #if !defined(SYS_lwp_private) && defined(SYS_lwpprivate)
78 # define SYS_lwp_private SYS_lwpprivate
81 #if !defined(SYS_lwp_kill) && defined(SYS_lwpkill)
82 # define SYS_lwp_kill SYS_lwpkill
85 #if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend)
86 # define SYS_lwp_suspend SYS_lwpsuspend
89 #if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue)
90 # define SYS_lwp_continue SYS_lwpcontinue
93 /* the name of the proc status struct depends on the implementation */
95 typedef pstatus_t gdb_prstatus_t;
97 typedef prstatus_t gdb_prstatus_t;
100 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
102 /* proc name formats may vary depending on the proc implementation */
103 #ifdef HAVE_MULTIPLE_PROC_FDS
104 # ifndef CTL_PROC_NAME_FMT
105 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
106 # define AS_PROC_NAME_FMT "/proc/%d/as"
107 # define MAP_PROC_NAME_FMT "/proc/%d/map"
108 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
110 #else /* HAVE_MULTIPLE_PROC_FDS */
111 # ifndef CTL_PROC_NAME_FMT
112 # define CTL_PROC_NAME_FMT "/proc/%05d"
113 # define AS_PROC_NAME_FMT "/proc/%05d"
114 # define MAP_PROC_NAME_FMT "/proc/%05d"
115 # define STATUS_PROC_NAME_FMT "/proc/%05d"
117 #endif /* HAVE_MULTIPLE_PROC_FDS */
120 /* These #ifdefs are for sol2.x in particular. sol2.x has
121 both a "gregset_t" and a "prgregset_t", which have
122 similar uses but different layouts. sol2.x gdb tries to
123 use prgregset_t (and prfpregset_t) everywhere. */
125 #ifdef GDB_GREGSET_TYPE
126 typedef GDB_GREGSET_TYPE gdb_gregset_t;
128 typedef gregset_t gdb_gregset_t;
131 #ifdef GDB_FPREGSET_TYPE
132 typedef GDB_FPREGSET_TYPE gdb_fpregset_t;
134 typedef fpregset_t gdb_fpregset_t;
138 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
140 struct target_ops procfs_ops;
142 int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
143 be a runnable target. Used by targets
144 that can sit atop procfs, such as solaris
147 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
148 CORE_ADDR kernel_u_addr;
151 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
153 #define si_pid _data._proc.pid
155 #define si_uid _data._proc._pdata._kill.uid
156 #endif /* BROKEN_SIGINFO_H */
158 /* Define structures for passing commands to /proc/pid/ctl file. Note that
159 while we create these for the PROCFS_USE_READ_WRITE world, we use them
160 and ignore the extra cmd int in other proc schemes.
162 /* generic ctl msg */
168 /* set general registers */
171 gdb_gregset_t gregset;
174 /* set fp registers */
177 gdb_fpregset_t fpregset;
180 /* set signals to be traced */
186 /* set faults to be traced */
192 /* set system calls to be traced */
198 /* set current signal to be traced */
204 /* All access to the inferior, either one started by gdb or one that has
205 been attached to, is controlled by an instance of a procinfo structure,
206 defined below. Since gdb currently only handles one inferior at a time,
207 the procinfo structure for the inferior is statically allocated and
208 only one exists at any given time. There is a separate procinfo
209 structure for use by the "info proc" command, so that we can print
210 useful information about any random process without interfering with
211 the inferior's procinfo information. */
214 struct procinfo *next;
215 int pid; /* Process ID of inferior */
216 int ctl_fd; /* File descriptor for /proc ctl file */
217 int status_fd; /* File descriptor for /proc status file */
218 int as_fd; /* File descriptor for /proc as file */
219 int map_fd; /* File descriptor for /proc map file */
220 char *pathname; /* Pathname to /proc entry */
221 int had_event; /* poll/select says something happened */
222 int was_stopped; /* Nonzero if was stopped prior to attach */
223 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
224 #ifndef HAVE_NO_PRRUN_T
225 prrun_t prrun; /* Control state when it is run */
227 gdb_prstatus_t prstatus; /* Current process status info */
228 struct greg_ctl gregset; /* General register set */
229 struct fpreg_ctl fpregset; /* Floating point register set */
230 struct flt_ctl fltset; /* Current traced hardware fault set */
231 struct sig_ctl trace; /* Current traced signal set */
232 struct sys_ctl exitset; /* Current traced system call exit set */
233 struct sys_ctl entryset; /* Current traced system call entry set */
234 struct sig_ctl saved_sighold; /* Saved held signal set */
235 struct flt_ctl saved_fltset; /* Saved traced hardware fault set */
236 struct sig_ctl saved_trace; /* Saved traced signal set */
237 struct sys_ctl saved_exitset; /* Saved traced system call exit set */
238 struct sys_ctl saved_entryset;/* Saved traced system call entry set */
239 int num_syscall_handlers; /* Number of syscall trap handlers
240 currently installed */
241 /* Pointer to list of syscall trap handlers */
242 struct procfs_syscall_handler *syscall_handlers;
243 int saved_rtnval; /* return value and status for wait(), */
244 int saved_statval; /* as supplied by a syscall handler. */
245 int new_child; /* Non-zero if it's a new thread */
248 /* List of inferior process information */
249 static struct procinfo *procinfo_list = NULL;
250 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
252 static int num_poll_list = 0; /* Number of entries in poll_list */
254 /* Much of the information used in the /proc interface, particularly for
255 printing status information, is kept as tables of structures of the
256 following form. These tables can be used to map numeric values to
257 their symbolic names and to a string that describes their specific use. */
260 int value; /* The numeric value */
261 char *name; /* The equivalent symbolic value */
262 char *desc; /* Short description of value */
265 /* Translate bits in the pr_flags member of the prstatus structure, into the
266 names and desc information. */
268 static struct trans pr_flag_table[] =
270 #if defined (PR_STOPPED)
271 { PR_STOPPED, "PR_STOPPED", "Process is stopped" },
273 #if defined (PR_ISTOP)
274 { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" },
276 #if defined (PR_DSTOP)
277 { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" },
279 #if defined (PR_ASLEEP)
280 { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" },
282 #if defined (PR_FORK)
283 { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" },
286 { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" },
288 #if defined (PR_PTRACE)
289 { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" },
291 #if defined (PR_PCINVAL)
292 { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" },
294 #if defined (PR_ISSYS)
295 { PR_ISSYS, "PR_ISSYS", "Is a system process" },
297 #if defined (PR_STEP)
298 { PR_STEP, "PR_STEP", "Process has single step pending" },
301 { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" },
303 #if defined (PR_ASYNC)
304 { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" },
306 #if defined (PR_PCOMPAT)
307 { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
309 #if defined (PR_MSACCT)
310 { PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled" },
312 #if defined (PR_BPTADJ)
313 { PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect" },
315 #if defined (PR_ASLWP)
316 { PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP" },
321 /* Translate values in the pr_why field of the prstatus struct. */
323 static struct trans pr_why_table[] =
325 #if defined (PR_REQUESTED)
326 { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
328 #if defined (PR_SIGNALLED)
329 { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
331 #if defined (PR_SYSENTRY)
332 { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
334 #if defined (PR_SYSEXIT)
335 { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
337 #if defined (PR_JOBCONTROL)
338 { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
340 #if defined (PR_FAULTED)
341 { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
343 #if defined (PR_SUSPENDED)
344 { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
346 #if defined (PR_CHECKPOINT)
347 { PR_CHECKPOINT, "PR_CHECKPOINT", "(???)" },
352 /* Hardware fault translation table. */
354 static struct trans faults_table[] =
357 { FLTILL, "FLTILL", "Illegal instruction" },
359 #if defined (FLTPRIV)
360 { FLTPRIV, "FLTPRIV", "Privileged instruction" },
363 { FLTBPT, "FLTBPT", "Breakpoint trap" },
365 #if defined (FLTTRACE)
366 { FLTTRACE, "FLTTRACE", "Trace trap" },
368 #if defined (FLTACCESS)
369 { FLTACCESS, "FLTACCESS", "Memory access fault" },
371 #if defined (FLTBOUNDS)
372 { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" },
374 #if defined (FLTIOVF)
375 { FLTIOVF, "FLTIOVF", "Integer overflow" },
377 #if defined (FLTIZDIV)
378 { FLTIZDIV, "FLTIZDIV", "Integer zero divide" },
381 { FLTFPE, "FLTFPE", "Floating-point exception" },
383 #if defined (FLTSTACK)
384 { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" },
386 #if defined (FLTPAGE)
387 { FLTPAGE, "FLTPAGE", "Recoverable page fault" },
392 /* Translation table for signal generation information. See UNIX System
393 V Release 4 Programmer's Reference Manual, siginfo(5). */
395 static struct sigcode {
400 } siginfo_table[] = {
401 #if defined (SIGILL) && defined (ILL_ILLOPC)
402 { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" },
404 #if defined (SIGILL) && defined (ILL_ILLOPN)
405 { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", },
407 #if defined (SIGILL) && defined (ILL_ILLADR)
408 { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" },
410 #if defined (SIGILL) && defined (ILL_ILLTRP)
411 { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" },
413 #if defined (SIGILL) && defined (ILL_PRVOPC)
414 { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" },
416 #if defined (SIGILL) && defined (ILL_PRVREG)
417 { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" },
419 #if defined (SIGILL) && defined (ILL_COPROC)
420 { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" },
422 #if defined (SIGILL) && defined (ILL_BADSTK)
423 { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" },
425 #if defined (SIGFPE) && defined (FPE_INTDIV)
426 { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" },
428 #if defined (SIGFPE) && defined (FPE_INTOVF)
429 { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" },
431 #if defined (SIGFPE) && defined (FPE_FLTDIV)
432 { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" },
434 #if defined (SIGFPE) && defined (FPE_FLTOVF)
435 { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" },
437 #if defined (SIGFPE) && defined (FPE_FLTUND)
438 { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" },
440 #if defined (SIGFPE) && defined (FPE_FLTRES)
441 { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" },
443 #if defined (SIGFPE) && defined (FPE_FLTINV)
444 { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" },
446 #if defined (SIGFPE) && defined (FPE_FLTSUB)
447 { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" },
449 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
450 { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" },
452 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
453 { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" },
455 #if defined (SIGBUS) && defined (BUS_ADRALN)
456 { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" },
458 #if defined (SIGBUS) && defined (BUS_ADRERR)
459 { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" },
461 #if defined (SIGBUS) && defined (BUS_OBJERR)
462 { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" },
464 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
465 { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" },
467 #if defined (SIGTRAP) && defined (TRAP_TRACE)
468 { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" },
470 #if defined (SIGCLD) && defined (CLD_EXITED)
471 { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" },
473 #if defined (SIGCLD) && defined (CLD_KILLED)
474 { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" },
476 #if defined (SIGCLD) && defined (CLD_DUMPED)
477 { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" },
479 #if defined (SIGCLD) && defined (CLD_TRAPPED)
480 { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" },
482 #if defined (SIGCLD) && defined (CLD_STOPPED)
483 { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" },
485 #if defined (SIGCLD) && defined (CLD_CONTINUED)
486 { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" },
488 #if defined (SIGPOLL) && defined (POLL_IN)
489 { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" },
491 #if defined (SIGPOLL) && defined (POLL_OUT)
492 { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" },
494 #if defined (SIGPOLL) && defined (POLL_MSG)
495 { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" },
497 #if defined (SIGPOLL) && defined (POLL_ERR)
498 { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" },
500 #if defined (SIGPOLL) && defined (POLL_PRI)
501 { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" },
503 #if defined (SIGPOLL) && defined (POLL_HUP)
504 { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" },
509 static char *syscall_table[MAX_SYSCALLS];
511 /* Prototypes for local functions */
513 static void procfs_stop PARAMS ((void));
515 static int procfs_thread_alive PARAMS ((int));
517 static int procfs_can_run PARAMS ((void));
519 static void procfs_mourn_inferior PARAMS ((void));
521 static void procfs_fetch_registers PARAMS ((int));
523 static int procfs_wait PARAMS ((int, struct target_waitstatus *));
525 static void procfs_open PARAMS ((char *, int));
527 static void procfs_files_info PARAMS ((struct target_ops *));
529 static void procfs_prepare_to_store PARAMS ((void));
531 static void procfs_detach PARAMS ((char *, int));
533 static void procfs_attach PARAMS ((char *, int));
535 static void proc_set_exec_trap PARAMS ((void));
537 static void procfs_init_inferior PARAMS ((int));
539 static struct procinfo *create_procinfo PARAMS ((int));
541 static void procfs_store_registers PARAMS ((int));
543 static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
545 static void procfs_kill_inferior PARAMS ((void));
547 static char *sigcodedesc PARAMS ((siginfo_t *));
549 static char *sigcodename PARAMS ((siginfo_t *));
551 static struct procinfo *wait_fd PARAMS ((void));
553 static void remove_fd PARAMS ((struct procinfo *));
555 static void add_fd PARAMS ((struct procinfo *));
557 static void set_proc_siginfo PARAMS ((struct procinfo *, int));
559 static void init_syscall_table PARAMS ((void));
561 static char *syscallname PARAMS ((int));
563 static char *signalname PARAMS ((int));
565 static char *errnoname PARAMS ((int));
567 static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
569 static int open_proc_file PARAMS ((int, struct procinfo *, int, int));
571 static void close_proc_file PARAMS ((struct procinfo *));
573 static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
575 static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN;
577 static void info_proc PARAMS ((char *, int));
579 static void info_proc_flags PARAMS ((struct procinfo *, int));
581 static void info_proc_stop PARAMS ((struct procinfo *, int));
583 static void info_proc_siginfo PARAMS ((struct procinfo *, int));
585 static void info_proc_syscalls PARAMS ((struct procinfo *, int));
587 static void info_proc_mappings PARAMS ((struct procinfo *, int));
589 static void info_proc_signals PARAMS ((struct procinfo *, int));
591 static void info_proc_faults PARAMS ((struct procinfo *, int));
593 static char *mappingflags PARAMS ((long));
595 static char *lookupname PARAMS ((struct trans *, unsigned int, char *));
597 static char *lookupdesc PARAMS ((struct trans *, unsigned int));
599 static int do_attach PARAMS ((int pid));
601 static void do_detach PARAMS ((int siggnal));
603 static void procfs_create_inferior PARAMS ((char *, char *, char **));
605 static void procfs_notice_signals PARAMS ((int pid));
607 static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *));
609 static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
611 static int procfs_write_pcwstop PARAMS ((struct procinfo *));
612 static int procfs_read_status PARAMS ((struct procinfo *));
613 static void procfs_write_pckill PARAMS ((struct procinfo *));
615 typedef int syscall_func_t PARAMS ((struct procinfo *pi, int syscall_num,
616 int why, int *rtnval, int *statval));
618 static void procfs_set_syscall_trap PARAMS ((struct procinfo *pi,
619 int syscall_num, int flags,
620 syscall_func_t *func));
622 static void procfs_clear_syscall_trap PARAMS ((struct procinfo *pi,
623 int syscall_num, int errok));
625 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
626 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
628 static syscall_func_t procfs_exit_handler;
630 static syscall_func_t procfs_exec_handler;
633 static syscall_func_t procfs_sproc_handler;
634 static syscall_func_t procfs_fork_handler;
637 #ifdef SYS_lwp_create
638 static syscall_func_t procfs_lwp_creation_handler;
641 static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag));
642 static void modify_run_on_last_close_flag PARAMS ((int fd, int flag));
646 struct procfs_syscall_handler
648 int syscall_num; /* The number of the system call being handled */
649 /* The function to be called */
650 syscall_func_t *func;
653 static void procfs_resume PARAMS ((int pid, int step,
654 enum target_signal signo));
656 static void init_procfs_ops PARAMS ((void));
658 /* External function prototypes that can't be easily included in any
659 header file because the args are typedefs in system include files. */
661 extern void supply_gregset PARAMS ((gdb_gregset_t *));
663 extern void fill_gregset PARAMS ((gdb_gregset_t *, int));
666 extern void supply_fpregset PARAMS ((gdb_fpregset_t *));
668 extern void fill_fpregset PARAMS ((gdb_fpregset_t *, int));
675 find_procinfo -- convert a process id to a struct procinfo
679 static struct procinfo * find_procinfo (pid_t pid, int okfail);
683 Given a process id, look it up in the procinfo chain. Returns
684 a struct procinfo *. If can't find pid, then call error(),
685 unless okfail is set, in which case, return NULL;
688 static struct procinfo *
689 find_procinfo (pid, okfail)
693 struct procinfo *procinfo;
695 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
696 if (procinfo->pid == pid)
702 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
709 current_procinfo -- convert inferior_pid to a struct procinfo
713 static struct procinfo * current_procinfo;
717 Looks up inferior_pid in the procinfo chain. Always returns a
718 struct procinfo *. If process can't be found, we error() out.
721 #define current_procinfo find_procinfo (inferior_pid, 0)
727 add_fd -- Add the fd to the poll/select list
731 static void add_fd (struct procinfo *);
735 Add the fd of the supplied procinfo to the list of fds used for
736 poll/select operations.
743 if (num_poll_list <= 0)
744 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
746 poll_list = (struct pollfd *) xrealloc (poll_list,
748 * sizeof (struct pollfd));
749 poll_list[num_poll_list].fd = pi->ctl_fd;
751 poll_list[num_poll_list].events = POLLWRNORM;
753 poll_list[num_poll_list].events = POLLPRI;
763 remove_fd -- Remove the fd from the poll/select list
767 static void remove_fd (struct procinfo *);
771 Remove the fd of the supplied procinfo from the list of fds used
772 for poll/select operations.
781 for (i = 0; i < num_poll_list; i++)
783 if (poll_list[i].fd == pi->ctl_fd)
785 if (i != num_poll_list - 1)
786 memcpy (poll_list + i, poll_list + i + 1,
787 (num_poll_list - i - 1) * sizeof (struct pollfd));
791 if (num_poll_list == 0)
794 poll_list = (struct pollfd *) xrealloc (poll_list,
796 * sizeof (struct pollfd));
806 procfs_read_status - get procfs fd status
810 static int procfs_read_status (pi) struct procinfo *pi;
814 Given a pointer to a procinfo struct, get the status of
815 the status_fd in the appropriate way. Returns 0 on failure,
820 procfs_read_status (pi)
823 #ifdef PROCFS_USE_READ_WRITE
824 if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) ||
825 (read (pi->status_fd, (char *) &pi->prstatus,
826 sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t)))
828 if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0)
839 procfs_write_pcwstop - send a PCWSTOP to procfs fd
843 static int procfs_write_pcwstop (pi) struct procinfo *pi;
847 Given a pointer to a procinfo struct, send a PCWSTOP to
848 the ctl_fd in the appropriate way. Returns 0 on failure,
853 procfs_write_pcwstop (pi)
856 #ifdef PROCFS_USE_READ_WRITE
858 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
860 if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0)
871 procfs_write_pckill - send a kill to procfs fd
875 static void procfs_write_pckill (pi) struct procinfo *pi;
879 Given a pointer to a procinfo struct, send a kill to
880 the ctl_fd in the appropriate way. Returns 0 on failure,
885 procfs_write_pckill (pi)
888 #ifdef PROCFS_USE_READ_WRITE
889 struct proc_ctl pctl;
892 write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl));
895 ioctl (pi->ctl_fd, PIOCKILL, &signo);
899 static struct procinfo *
902 struct procinfo *pi, *next_pi;
908 set_sigint_trap (); /* Causes SIGINT to be passed on to the
916 num_fds = poll (poll_list, num_poll_list, -1);
919 if (num_fds < 0 && errno == EINTR)
921 print_sys_errmsg ("poll failed", errno);
922 error ("Poll failed, returned %d", num_fds);
924 #else /* LOSING_POLL */
925 pi = current_procinfo;
927 while (!procfs_write_pcwstop (pi))
931 /* Process exited. */
932 pi->prstatus.pr_flags = 0;
935 else if (errno != EINTR)
937 print_sys_errmsg (pi->pathname, errno);
938 error ("procfs_write_pcwstop failed");
942 #endif /* LOSING_POLL */
944 clear_sigint_trap ();
949 for (i = 0; i < num_poll_list && num_fds > 0; i++)
951 if (0 == (poll_list[i].revents &
952 (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL)))
954 for (pi = procinfo_list; pi; pi = next_pi)
957 if (poll_list[i].fd == pi->ctl_fd)
960 if ((poll_list[i].revents & POLLHUP) != 0 ||
961 !procfs_read_status(pi))
962 { /* The LWP has apparently terminated. */
963 if (num_poll_list <= 1)
965 pi->prstatus.pr_flags = 0;
970 printf_filtered ("LWP %d exited.\n",
971 (pi->pid >> 16) & 0xffff);
972 close_proc_file (pi);
973 i--; /* don't skip deleted entry */
975 break; /* already another event to process */
977 goto wait_again; /* wait for another event */
984 error ("wait_fd: Couldn't find procinfo for fd %d\n",
987 #endif /* LOSING_POLL */
996 lookupdesc -- translate a value to a summary desc string
1000 static char *lookupdesc (struct trans *transp, unsigned int val);
1004 Given a pointer to a translation table and a value to be translated,
1005 lookup the desc string and return it.
1009 lookupdesc (transp, val)
1010 struct trans *transp;
1015 for (desc = NULL; transp -> name != NULL; transp++)
1017 if (transp -> value == val)
1019 desc = transp -> desc;
1024 /* Didn't find a translation for the specified value, set a default one. */
1037 lookupname -- translate a value to symbolic name
1041 static char *lookupname (struct trans *transp, unsigned int val,
1046 Given a pointer to a translation table, a value to be translated,
1047 and a default prefix to return if the value can't be translated,
1048 match the value with one of the translation table entries and
1049 return a pointer to the symbolic name.
1051 If no match is found it just returns the value as a printable string,
1052 with the given prefix. The previous such value, if any, is freed
1057 lookupname (transp, val, prefix)
1058 struct trans *transp;
1062 static char *locbuf;
1065 for (name = NULL; transp -> name != NULL; transp++)
1067 if (transp -> value == val)
1069 name = transp -> name;
1074 /* Didn't find a translation for the specified value, build a default
1075 one using the specified prefix and return it. The lifetime of
1076 the value is only until the next one is needed. */
1084 locbuf = xmalloc (strlen (prefix) + 16);
1085 sprintf (locbuf, "%s %u", prefix, val);
1095 struct sigcode *scp;
1097 static char locbuf[32];
1099 for (scp = siginfo_table; scp -> codename != NULL; scp++)
1101 if ((scp -> signo == sip -> si_signo) &&
1102 (scp -> code == sip -> si_code))
1104 name = scp -> codename;
1110 sprintf (locbuf, "sigcode %u", sip -> si_signo);
1120 struct sigcode *scp;
1123 for (scp = siginfo_table; scp -> codename != NULL; scp++)
1125 if ((scp -> signo == sip -> si_signo) &&
1126 (scp -> code == sip -> si_code))
1134 desc = "Unrecognized signal or trap use";
1143 syscallname - translate a system call number into a system call name
1147 char *syscallname (int syscallnum)
1151 Given a system call number, translate it into the printable name
1152 of a system call, or into "syscall <num>" if it is an unknown
1157 syscallname (syscallnum)
1160 static char locbuf[32];
1162 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS
1163 && syscall_table[syscallnum] != NULL)
1164 return syscall_table[syscallnum];
1167 sprintf (locbuf, "syscall %u", syscallnum);
1176 init_syscall_table - initialize syscall translation table
1180 void init_syscall_table (void)
1184 Dynamically initialize the translation table to convert system
1185 call numbers into printable system call names. Done once per
1186 gdb run, on initialization.
1190 This is awfully ugly, but preprocessor tricks to make it prettier
1191 tend to be nonportable.
1195 init_syscall_table ()
1197 #if defined (SYS_exit)
1198 syscall_table[SYS_exit] = "exit";
1200 #if defined (SYS_fork)
1201 syscall_table[SYS_fork] = "fork";
1203 #if defined (SYS_read)
1204 syscall_table[SYS_read] = "read";
1206 #if defined (SYS_write)
1207 syscall_table[SYS_write] = "write";
1209 #if defined (SYS_open)
1210 syscall_table[SYS_open] = "open";
1212 #if defined (SYS_close)
1213 syscall_table[SYS_close] = "close";
1215 #if defined (SYS_wait)
1216 syscall_table[SYS_wait] = "wait";
1218 #if defined (SYS_creat)
1219 syscall_table[SYS_creat] = "creat";
1221 #if defined (SYS_link)
1222 syscall_table[SYS_link] = "link";
1224 #if defined (SYS_unlink)
1225 syscall_table[SYS_unlink] = "unlink";
1227 #if defined (SYS_exec)
1228 syscall_table[SYS_exec] = "exec";
1230 #if defined (SYS_execv)
1231 syscall_table[SYS_execv] = "execv";
1233 #if defined (SYS_execve)
1234 syscall_table[SYS_execve] = "execve";
1236 #if defined (SYS_chdir)
1237 syscall_table[SYS_chdir] = "chdir";
1239 #if defined (SYS_time)
1240 syscall_table[SYS_time] = "time";
1242 #if defined (SYS_mknod)
1243 syscall_table[SYS_mknod] = "mknod";
1245 #if defined (SYS_chmod)
1246 syscall_table[SYS_chmod] = "chmod";
1248 #if defined (SYS_chown)
1249 syscall_table[SYS_chown] = "chown";
1251 #if defined (SYS_brk)
1252 syscall_table[SYS_brk] = "brk";
1254 #if defined (SYS_stat)
1255 syscall_table[SYS_stat] = "stat";
1257 #if defined (SYS_lseek)
1258 syscall_table[SYS_lseek] = "lseek";
1260 #if defined (SYS_getpid)
1261 syscall_table[SYS_getpid] = "getpid";
1263 #if defined (SYS_mount)
1264 syscall_table[SYS_mount] = "mount";
1266 #if defined (SYS_umount)
1267 syscall_table[SYS_umount] = "umount";
1269 #if defined (SYS_setuid)
1270 syscall_table[SYS_setuid] = "setuid";
1272 #if defined (SYS_getuid)
1273 syscall_table[SYS_getuid] = "getuid";
1275 #if defined (SYS_stime)
1276 syscall_table[SYS_stime] = "stime";
1278 #if defined (SYS_ptrace)
1279 syscall_table[SYS_ptrace] = "ptrace";
1281 #if defined (SYS_alarm)
1282 syscall_table[SYS_alarm] = "alarm";
1284 #if defined (SYS_fstat)
1285 syscall_table[SYS_fstat] = "fstat";
1287 #if defined (SYS_pause)
1288 syscall_table[SYS_pause] = "pause";
1290 #if defined (SYS_utime)
1291 syscall_table[SYS_utime] = "utime";
1293 #if defined (SYS_stty)
1294 syscall_table[SYS_stty] = "stty";
1296 #if defined (SYS_gtty)
1297 syscall_table[SYS_gtty] = "gtty";
1299 #if defined (SYS_access)
1300 syscall_table[SYS_access] = "access";
1302 #if defined (SYS_nice)
1303 syscall_table[SYS_nice] = "nice";
1305 #if defined (SYS_statfs)
1306 syscall_table[SYS_statfs] = "statfs";
1308 #if defined (SYS_sync)
1309 syscall_table[SYS_sync] = "sync";
1311 #if defined (SYS_kill)
1312 syscall_table[SYS_kill] = "kill";
1314 #if defined (SYS_fstatfs)
1315 syscall_table[SYS_fstatfs] = "fstatfs";
1317 #if defined (SYS_pgrpsys)
1318 syscall_table[SYS_pgrpsys] = "pgrpsys";
1320 #if defined (SYS_xenix)
1321 syscall_table[SYS_xenix] = "xenix";
1323 #if defined (SYS_dup)
1324 syscall_table[SYS_dup] = "dup";
1326 #if defined (SYS_pipe)
1327 syscall_table[SYS_pipe] = "pipe";
1329 #if defined (SYS_times)
1330 syscall_table[SYS_times] = "times";
1332 #if defined (SYS_profil)
1333 syscall_table[SYS_profil] = "profil";
1335 #if defined (SYS_plock)
1336 syscall_table[SYS_plock] = "plock";
1338 #if defined (SYS_setgid)
1339 syscall_table[SYS_setgid] = "setgid";
1341 #if defined (SYS_getgid)
1342 syscall_table[SYS_getgid] = "getgid";
1344 #if defined (SYS_signal)
1345 syscall_table[SYS_signal] = "signal";
1347 #if defined (SYS_msgsys)
1348 syscall_table[SYS_msgsys] = "msgsys";
1350 #if defined (SYS_sys3b)
1351 syscall_table[SYS_sys3b] = "sys3b";
1353 #if defined (SYS_sysi86)
1354 syscall_table[SYS_sysi86] = "sysi86";
1356 #if defined (SYS_acct)
1357 syscall_table[SYS_acct] = "acct";
1359 #if defined (SYS_shmsys)
1360 syscall_table[SYS_shmsys] = "shmsys";
1362 #if defined (SYS_semsys)
1363 syscall_table[SYS_semsys] = "semsys";
1365 #if defined (SYS_ioctl)
1366 syscall_table[SYS_ioctl] = "ioctl";
1368 #if defined (SYS_uadmin)
1369 syscall_table[SYS_uadmin] = "uadmin";
1371 #if defined (SYS_utssys)
1372 syscall_table[SYS_utssys] = "utssys";
1374 #if defined (SYS_fsync)
1375 syscall_table[SYS_fsync] = "fsync";
1377 #if defined (SYS_umask)
1378 syscall_table[SYS_umask] = "umask";
1380 #if defined (SYS_chroot)
1381 syscall_table[SYS_chroot] = "chroot";
1383 #if defined (SYS_fcntl)
1384 syscall_table[SYS_fcntl] = "fcntl";
1386 #if defined (SYS_ulimit)
1387 syscall_table[SYS_ulimit] = "ulimit";
1389 #if defined (SYS_rfsys)
1390 syscall_table[SYS_rfsys] = "rfsys";
1392 #if defined (SYS_rmdir)
1393 syscall_table[SYS_rmdir] = "rmdir";
1395 #if defined (SYS_mkdir)
1396 syscall_table[SYS_mkdir] = "mkdir";
1398 #if defined (SYS_getdents)
1399 syscall_table[SYS_getdents] = "getdents";
1401 #if defined (SYS_sysfs)
1402 syscall_table[SYS_sysfs] = "sysfs";
1404 #if defined (SYS_getmsg)
1405 syscall_table[SYS_getmsg] = "getmsg";
1407 #if defined (SYS_putmsg)
1408 syscall_table[SYS_putmsg] = "putmsg";
1410 #if defined (SYS_poll)
1411 syscall_table[SYS_poll] = "poll";
1413 #if defined (SYS_lstat)
1414 syscall_table[SYS_lstat] = "lstat";
1416 #if defined (SYS_symlink)
1417 syscall_table[SYS_symlink] = "symlink";
1419 #if defined (SYS_readlink)
1420 syscall_table[SYS_readlink] = "readlink";
1422 #if defined (SYS_setgroups)
1423 syscall_table[SYS_setgroups] = "setgroups";
1425 #if defined (SYS_getgroups)
1426 syscall_table[SYS_getgroups] = "getgroups";
1428 #if defined (SYS_fchmod)
1429 syscall_table[SYS_fchmod] = "fchmod";
1431 #if defined (SYS_fchown)
1432 syscall_table[SYS_fchown] = "fchown";
1434 #if defined (SYS_sigprocmask)
1435 syscall_table[SYS_sigprocmask] = "sigprocmask";
1437 #if defined (SYS_sigsuspend)
1438 syscall_table[SYS_sigsuspend] = "sigsuspend";
1440 #if defined (SYS_sigaltstack)
1441 syscall_table[SYS_sigaltstack] = "sigaltstack";
1443 #if defined (SYS_sigaction)
1444 syscall_table[SYS_sigaction] = "sigaction";
1446 #if defined (SYS_sigpending)
1447 syscall_table[SYS_sigpending] = "sigpending";
1449 #if defined (SYS_context)
1450 syscall_table[SYS_context] = "context";
1452 #if defined (SYS_evsys)
1453 syscall_table[SYS_evsys] = "evsys";
1455 #if defined (SYS_evtrapret)
1456 syscall_table[SYS_evtrapret] = "evtrapret";
1458 #if defined (SYS_statvfs)
1459 syscall_table[SYS_statvfs] = "statvfs";
1461 #if defined (SYS_fstatvfs)
1462 syscall_table[SYS_fstatvfs] = "fstatvfs";
1464 #if defined (SYS_nfssys)
1465 syscall_table[SYS_nfssys] = "nfssys";
1467 #if defined (SYS_waitsys)
1468 syscall_table[SYS_waitsys] = "waitsys";
1470 #if defined (SYS_sigsendsys)
1471 syscall_table[SYS_sigsendsys] = "sigsendsys";
1473 #if defined (SYS_hrtsys)
1474 syscall_table[SYS_hrtsys] = "hrtsys";
1476 #if defined (SYS_acancel)
1477 syscall_table[SYS_acancel] = "acancel";
1479 #if defined (SYS_async)
1480 syscall_table[SYS_async] = "async";
1482 #if defined (SYS_priocntlsys)
1483 syscall_table[SYS_priocntlsys] = "priocntlsys";
1485 #if defined (SYS_pathconf)
1486 syscall_table[SYS_pathconf] = "pathconf";
1488 #if defined (SYS_mincore)
1489 syscall_table[SYS_mincore] = "mincore";
1491 #if defined (SYS_mmap)
1492 syscall_table[SYS_mmap] = "mmap";
1494 #if defined (SYS_mprotect)
1495 syscall_table[SYS_mprotect] = "mprotect";
1497 #if defined (SYS_munmap)
1498 syscall_table[SYS_munmap] = "munmap";
1500 #if defined (SYS_fpathconf)
1501 syscall_table[SYS_fpathconf] = "fpathconf";
1503 #if defined (SYS_vfork)
1504 syscall_table[SYS_vfork] = "vfork";
1506 #if defined (SYS_fchdir)
1507 syscall_table[SYS_fchdir] = "fchdir";
1509 #if defined (SYS_readv)
1510 syscall_table[SYS_readv] = "readv";
1512 #if defined (SYS_writev)
1513 syscall_table[SYS_writev] = "writev";
1515 #if defined (SYS_xstat)
1516 syscall_table[SYS_xstat] = "xstat";
1518 #if defined (SYS_lxstat)
1519 syscall_table[SYS_lxstat] = "lxstat";
1521 #if defined (SYS_fxstat)
1522 syscall_table[SYS_fxstat] = "fxstat";
1524 #if defined (SYS_xmknod)
1525 syscall_table[SYS_xmknod] = "xmknod";
1527 #if defined (SYS_clocal)
1528 syscall_table[SYS_clocal] = "clocal";
1530 #if defined (SYS_setrlimit)
1531 syscall_table[SYS_setrlimit] = "setrlimit";
1533 #if defined (SYS_getrlimit)
1534 syscall_table[SYS_getrlimit] = "getrlimit";
1536 #if defined (SYS_lchown)
1537 syscall_table[SYS_lchown] = "lchown";
1539 #if defined (SYS_memcntl)
1540 syscall_table[SYS_memcntl] = "memcntl";
1542 #if defined (SYS_getpmsg)
1543 syscall_table[SYS_getpmsg] = "getpmsg";
1545 #if defined (SYS_putpmsg)
1546 syscall_table[SYS_putpmsg] = "putpmsg";
1548 #if defined (SYS_rename)
1549 syscall_table[SYS_rename] = "rename";
1551 #if defined (SYS_uname)
1552 syscall_table[SYS_uname] = "uname";
1554 #if defined (SYS_setegid)
1555 syscall_table[SYS_setegid] = "setegid";
1557 #if defined (SYS_sysconfig)
1558 syscall_table[SYS_sysconfig] = "sysconfig";
1560 #if defined (SYS_adjtime)
1561 syscall_table[SYS_adjtime] = "adjtime";
1563 #if defined (SYS_systeminfo)
1564 syscall_table[SYS_systeminfo] = "systeminfo";
1566 #if defined (SYS_seteuid)
1567 syscall_table[SYS_seteuid] = "seteuid";
1569 #if defined (SYS_sproc)
1570 syscall_table[SYS_sproc] = "sproc";
1572 #if defined (SYS_keyctl)
1573 syscall_table[SYS_keyctl] = "keyctl";
1575 #if defined (SYS_secsys)
1576 syscall_table[SYS_secsys] = "secsys";
1578 #if defined (SYS_filepriv)
1579 syscall_table[SYS_filepriv] = "filepriv";
1581 #if defined (SYS_procpriv)
1582 syscall_table[SYS_procpriv] = "procpriv";
1584 #if defined (SYS_devstat)
1585 syscall_table[SYS_devstat] = "devstat";
1587 #if defined (SYS_aclipc)
1588 syscall_table[SYS_aclipc] = "aclipc";
1590 #if defined (SYS_fdevstat)
1591 syscall_table[SYS_fdevstat] = "fdevstat";
1593 #if defined (SYS_flvlfile)
1594 syscall_table[SYS_flvlfile] = "flvlfile";
1596 #if defined (SYS_lvlfile)
1597 syscall_table[SYS_lvlfile] = "lvlfile";
1599 #if defined (SYS_lvlequal)
1600 syscall_table[SYS_lvlequal] = "lvlequal";
1602 #if defined (SYS_lvlproc)
1603 syscall_table[SYS_lvlproc] = "lvlproc";
1605 #if defined (SYS_lvlipc)
1606 syscall_table[SYS_lvlipc] = "lvlipc";
1608 #if defined (SYS_acl)
1609 syscall_table[SYS_acl] = "acl";
1611 #if defined (SYS_auditevt)
1612 syscall_table[SYS_auditevt] = "auditevt";
1614 #if defined (SYS_auditctl)
1615 syscall_table[SYS_auditctl] = "auditctl";
1617 #if defined (SYS_auditdmp)
1618 syscall_table[SYS_auditdmp] = "auditdmp";
1620 #if defined (SYS_auditlog)
1621 syscall_table[SYS_auditlog] = "auditlog";
1623 #if defined (SYS_auditbuf)
1624 syscall_table[SYS_auditbuf] = "auditbuf";
1626 #if defined (SYS_lvldom)
1627 syscall_table[SYS_lvldom] = "lvldom";
1629 #if defined (SYS_lvlvfs)
1630 syscall_table[SYS_lvlvfs] = "lvlvfs";
1632 #if defined (SYS_mkmld)
1633 syscall_table[SYS_mkmld] = "mkmld";
1635 #if defined (SYS_mldmode)
1636 syscall_table[SYS_mldmode] = "mldmode";
1638 #if defined (SYS_secadvise)
1639 syscall_table[SYS_secadvise] = "secadvise";
1641 #if defined (SYS_online)
1642 syscall_table[SYS_online] = "online";
1644 #if defined (SYS_setitimer)
1645 syscall_table[SYS_setitimer] = "setitimer";
1647 #if defined (SYS_getitimer)
1648 syscall_table[SYS_getitimer] = "getitimer";
1650 #if defined (SYS_gettimeofday)
1651 syscall_table[SYS_gettimeofday] = "gettimeofday";
1653 #if defined (SYS_settimeofday)
1654 syscall_table[SYS_settimeofday] = "settimeofday";
1656 #if defined (SYS_lwp_create)
1657 syscall_table[SYS_lwp_create] = "_lwp_create";
1659 #if defined (SYS_lwp_exit)
1660 syscall_table[SYS_lwp_exit] = "_lwp_exit";
1662 #if defined (SYS_lwp_wait)
1663 syscall_table[SYS_lwp_wait] = "_lwp_wait";
1665 #if defined (SYS_lwp_self)
1666 syscall_table[SYS_lwp_self] = "_lwp_self";
1668 #if defined (SYS_lwp_info)
1669 syscall_table[SYS_lwp_info] = "_lwp_info";
1671 #if defined (SYS_lwp_private)
1672 syscall_table[SYS_lwp_private] = "_lwp_private";
1674 #if defined (SYS_processor_bind)
1675 syscall_table[SYS_processor_bind] = "processor_bind";
1677 #if defined (SYS_processor_exbind)
1678 syscall_table[SYS_processor_exbind] = "processor_exbind";
1680 #if defined (SYS_prepblock)
1681 syscall_table[SYS_prepblock] = "prepblock";
1683 #if defined (SYS_block)
1684 syscall_table[SYS_block] = "block";
1686 #if defined (SYS_rdblock)
1687 syscall_table[SYS_rdblock] = "rdblock";
1689 #if defined (SYS_unblock)
1690 syscall_table[SYS_unblock] = "unblock";
1692 #if defined (SYS_cancelblock)
1693 syscall_table[SYS_cancelblock] = "cancelblock";
1695 #if defined (SYS_pread)
1696 syscall_table[SYS_pread] = "pread";
1698 #if defined (SYS_pwrite)
1699 syscall_table[SYS_pwrite] = "pwrite";
1701 #if defined (SYS_truncate)
1702 syscall_table[SYS_truncate] = "truncate";
1704 #if defined (SYS_ftruncate)
1705 syscall_table[SYS_ftruncate] = "ftruncate";
1707 #if defined (SYS_lwp_kill)
1708 syscall_table[SYS_lwp_kill] = "_lwp_kill";
1710 #if defined (SYS_sigwait)
1711 syscall_table[SYS_sigwait] = "sigwait";
1713 #if defined (SYS_fork1)
1714 syscall_table[SYS_fork1] = "fork1";
1716 #if defined (SYS_forkall)
1717 syscall_table[SYS_forkall] = "forkall";
1719 #if defined (SYS_modload)
1720 syscall_table[SYS_modload] = "modload";
1722 #if defined (SYS_moduload)
1723 syscall_table[SYS_moduload] = "moduload";
1725 #if defined (SYS_modpath)
1726 syscall_table[SYS_modpath] = "modpath";
1728 #if defined (SYS_modstat)
1729 syscall_table[SYS_modstat] = "modstat";
1731 #if defined (SYS_modadm)
1732 syscall_table[SYS_modadm] = "modadm";
1734 #if defined (SYS_getksym)
1735 syscall_table[SYS_getksym] = "getksym";
1737 #if defined (SYS_lwp_suspend)
1738 syscall_table[SYS_lwp_suspend] = "_lwp_suspend";
1740 #if defined (SYS_lwp_continue)
1741 syscall_table[SYS_lwp_continue] = "_lwp_continue";
1743 #if defined (SYS_priocntllst)
1744 syscall_table[SYS_priocntllst] = "priocntllst";
1746 #if defined (SYS_sleep)
1747 syscall_table[SYS_sleep] = "sleep";
1749 #if defined (SYS_lwp_sema_wait)
1750 syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait";
1752 #if defined (SYS_lwp_sema_post)
1753 syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post";
1755 #if defined (SYS_lwp_sema_trywait)
1756 syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait";
1758 #if defined(SYS_fstatvfs64)
1759 syscall_table[SYS_fstatvfs64] = "fstatvfs64";
1761 #if defined(SYS_statvfs64)
1762 syscall_table[SYS_statvfs64] = "statvfs64";
1764 #if defined(SYS_ftruncate64)
1765 syscall_table[SYS_ftruncate64] = "ftruncate64";
1767 #if defined(SYS_truncate64)
1768 syscall_table[SYS_truncate64] = "truncate64";
1770 #if defined(SYS_getrlimit64)
1771 syscall_table[SYS_getrlimit64] = "getrlimit64";
1773 #if defined(SYS_setrlimit64)
1774 syscall_table[SYS_setrlimit64] = "setrlimit64";
1776 #if defined(SYS_lseek64)
1777 syscall_table[SYS_lseek64] = "lseek64";
1779 #if defined(SYS_mmap64)
1780 syscall_table[SYS_mmap64] = "mmap64";
1782 #if defined(SYS_pread64)
1783 syscall_table[SYS_pread64] = "pread64";
1785 #if defined(SYS_creat64)
1786 syscall_table[SYS_creat64] = "creat64";
1788 #if defined(SYS_dshmsys)
1789 syscall_table[SYS_dshmsys] = "dshmsys";
1791 #if defined(SYS_invlpg)
1792 syscall_table[SYS_invlpg] = "invlpg";
1794 #if defined(SYS_cg_ids)
1795 syscall_table[SYS_cg_ids] = "cg_ids";
1797 #if defined(SYS_cg_processors)
1798 syscall_table[SYS_cg_processors] = "cg_processors";
1800 #if defined(SYS_cg_info)
1801 syscall_table[SYS_cg_info] = "cg_info";
1803 #if defined(SYS_cg_bind)
1804 syscall_table[SYS_cg_bind] = "cg_bind";
1806 #if defined(SYS_cg_current)
1807 syscall_table[SYS_cg_current] = "cg_current";
1809 #if defined(SYS_cg_memloc)
1810 syscall_table[SYS_cg_memloc] = "cg_memloc";
1818 procfs_kill_inferior - kill any currently inferior
1822 void procfs_kill_inferior (void)
1826 Kill any current inferior.
1830 Kills even attached inferiors. Presumably the user has already
1831 been prompted that the inferior is an attached one rather than
1832 one started by gdb. (FIXME?)
1837 procfs_kill_inferior ()
1839 target_mourn_inferior ();
1846 unconditionally_kill_inferior - terminate the inferior
1850 static void unconditionally_kill_inferior (struct procinfo *)
1854 Kill the specified inferior.
1858 A possibly useful enhancement would be to first try sending
1859 the inferior a terminate signal, politely asking it to commit
1860 suicide, before we murder it (we could call that
1861 politely_kill_inferior()).
1866 unconditionally_kill_inferior (pi)
1867 struct procinfo *pi;
1870 struct proc_ctl pctl;
1872 ppid = pi->prstatus.pr_ppid;
1874 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
1875 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1876 before the PIOCKILL, otherwise it might generate a corrupted core
1877 file for the inferior. */
1878 ioctl (pi->ctl_fd, PIOCSSIG, NULL);
1880 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1881 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1882 to kill the inferior, otherwise it might remain stopped with a
1884 We do not check the result of the PIOCSSIG, the inferior might have
1887 struct siginfo newsiginfo;
1889 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
1890 newsiginfo.si_signo = SIGKILL;
1891 newsiginfo.si_code = 0;
1892 newsiginfo.si_errno = 0;
1893 newsiginfo.si_pid = getpid ();
1894 newsiginfo.si_uid = getuid ();
1895 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
1897 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1898 procfs_write_pckill (pi);
1899 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1901 close_proc_file (pi);
1903 /* Only wait() for our direct children. Our grandchildren zombies are killed
1904 by the death of their parents. */
1906 if (ppid == getpid())
1914 procfs_xfer_memory -- copy data to or from inferior memory space
1918 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1919 int dowrite, struct target_ops target)
1923 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1924 from/to debugger memory starting at MYADDR. Copy from inferior
1925 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1927 Returns the length copied, which is either the LEN argument or
1928 zero. This xfer function does not do partial moves, since procfs_ops
1929 doesn't allow memory operations to cross below us in the target stack
1934 The /proc interface makes this an almost trivial task.
1938 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1943 struct target_ops *target; /* ignored */
1946 struct procinfo *pi;
1948 pi = current_procinfo;
1950 if (lseek(pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
1954 nbytes = write (pi->as_fd, myaddr, len);
1958 nbytes = read (pi->as_fd, myaddr, len);
1972 procfs_store_registers -- copy register values back to inferior
1976 void procfs_store_registers (int regno)
1980 Store our current register values back into the inferior. If
1981 REGNO is -1 then store all the register, otherwise store just
1982 the value specified by REGNO.
1986 If we are storing only a single register, we first have to get all
1987 the current values from the process, overwrite the desired register
1988 in the gregset with the one we want from gdb's registers, and then
1989 send the whole set back to the process. For writing all the
1990 registers, all we have to do is generate the gregset and send it to
1993 Also note that the process has to be stopped on an event of interest
1994 for this to work, which basically means that it has to have been
1995 run under the control of one of the other /proc ioctl calls and not
1996 ptrace. Since we don't use ptrace anyway, we don't worry about this
1997 fine point, but it is worth noting for future reference.
1999 Gdb is confused about what this function is supposed to return.
2000 Some versions return a value, others return nothing. Some are
2001 declared to return a value and actually return nothing. Gdb ignores
2002 anything returned. (FIXME)
2007 procfs_store_registers (regno)
2010 struct procinfo *pi;
2011 #ifdef PROCFS_USE_READ_WRITE
2012 struct greg_ctl greg;
2013 struct fpreg_ctl fpreg;
2016 pi = current_procinfo;
2018 #ifdef PROCFS_USE_READ_WRITE
2021 procfs_read_status (pi);
2022 memcpy ((char *) &greg.gregset,
2023 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs,
2024 sizeof (gdb_gregset_t));
2026 fill_gregset (&greg.gregset, regno);
2028 write (pi->ctl_fd, &greg, sizeof (greg));
2029 #else /* PROCFS_USE_READ_WRITE */
2032 ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset);
2034 fill_gregset (&pi->gregset.gregset, regno);
2035 ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset);
2036 #endif /* PROCFS_USE_READ_WRITE */
2038 #if defined (FP0_REGNUM)
2040 /* Now repeat everything using the floating point register set, if the
2041 target has floating point hardware. Since we ignore the returned value,
2042 we'll never know whether it worked or not anyway. */
2044 #ifdef PROCFS_USE_READ_WRITE
2047 procfs_read_status (pi);
2048 memcpy ((char *) &fpreg.fpregset,
2049 (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs,
2050 sizeof (gdb_fpregset_t));
2052 fill_fpregset (&fpreg.fpregset, regno);
2053 fpreg.cmd = PCSFPREG;
2054 write (pi->ctl_fd, &fpreg, sizeof (fpreg));
2055 #else /* PROCFS_USE_READ_WRITE */
2058 ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset);
2060 fill_fpregset (&pi->fpregset.fpregset, regno);
2061 ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset);
2062 #endif /* PROCFS_USE_READ_WRITE */
2064 #endif /* FP0_REGNUM */
2072 init_procinfo - setup a procinfo struct and connect it to a process
2076 struct procinfo * init_procinfo (int pid)
2080 Allocate a procinfo structure, open the /proc file and then set up the
2081 set of signals and faults that are to be traced. Returns a pointer to
2082 the new procinfo structure.
2086 If proc_init_failed ever gets called, control returns to the command
2087 processing loop via the standard error handling code.
2091 static struct procinfo *
2092 init_procinfo (pid, kill)
2096 struct procinfo *pi = (struct procinfo *)
2097 xmalloc (sizeof (struct procinfo));
2098 struct sig_ctl sctl;
2099 struct flt_ctl fctl;
2101 memset ((char *) pi, 0, sizeof (*pi));
2102 if (!open_proc_file (pid, pi, O_RDWR, 1))
2103 proc_init_failed (pi, "can't open process file", kill);
2105 /* open_proc_file may modify pid. */
2109 /* Add new process to process info list */
2111 pi->next = procinfo_list;
2114 add_fd (pi); /* Add to list for poll/select */
2116 /* Remember some things about the inferior that we will, or might, change
2117 so that we can restore them when we detach. */
2119 memcpy ((char *) &pi->saved_trace.sigset,
2120 (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
2121 memcpy ((char *) &pi->saved_fltset.fltset,
2122 (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
2123 memcpy ((char *) &pi->saved_entryset.sysset,
2124 (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
2125 memcpy ((char *) &pi->saved_exitset.sysset,
2126 (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
2128 /* Set up trace and fault sets, as gdb expects them. */
2130 prfillset (&sctl.sigset);
2131 notice_signals (pi, &sctl);
2132 prfillset (&fctl.fltset);
2133 prdelset (&fctl.fltset, FLTPAGE);
2135 #else /* ! UNIXWARE */
2136 ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
2137 ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
2138 ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
2139 ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
2140 ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
2142 /* Set up trace and fault sets, as gdb expects them. */
2144 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
2145 prfillset (&pi->prrun.pr_trace);
2146 procfs_notice_signals (pid);
2147 prfillset (&pi->prrun.pr_fault);
2148 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2149 #ifdef PROCFS_DONT_TRACE_FAULTS
2150 premptyset (&pi->prrun.pr_fault);
2152 #endif /* UNIXWARE */
2154 if (!procfs_read_status (pi))
2155 proc_init_failed (pi, "procfs_read_status failed", kill);
2164 create_procinfo - initialize access to a /proc entry
2168 struct procinfo * create_procinfo (int pid)
2172 Allocate a procinfo structure, open the /proc file and then set up the
2173 set of signals and faults that are to be traced. Returns a pointer to
2174 the new procinfo structure.
2178 If proc_init_failed ever gets called, control returns to the command
2179 processing loop via the standard error handling code.
2183 static struct procinfo *
2184 create_procinfo (pid)
2187 struct procinfo *pi;
2188 struct sig_ctl sctl;
2189 struct flt_ctl fctl;
2191 pi = find_procinfo (pid, 1);
2193 return pi; /* All done! It already exists */
2195 pi = init_procinfo (pid, 1);
2198 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2199 already stopped, even if they all have PR_ASYNC set. */
2200 if (!(pi->prstatus.pr_flags & PR_STOPPED))
2202 if (!procfs_write_pcwstop (pi))
2203 proc_init_failed (pi, "procfs_write_pcwstop failed", 1);
2205 #ifdef PROCFS_USE_READ_WRITE
2206 fctl.cmd = PCSFAULT;
2207 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
2208 proc_init_failed (pi, "PCSFAULT failed", 1);
2210 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
2211 proc_init_failed (pi, "PIOCSFAULT failed", 1);
2221 procfs_exit_handler - handle entry into the _exit syscall
2225 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2229 This routine is called when an inferior process enters the _exit()
2230 system call. It continues the process, and then collects the exit
2231 status and pid which are returned in *statvalp and *rtnvalp. After
2232 that it returns non-zero to indicate that procfs_wait should wake up.
2235 There is probably a better way to do this.
2240 procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2241 struct procinfo *pi;
2247 struct procinfo *temp_pi, *next_pi;
2248 struct proc_ctl pctl;
2252 pctl.data = PRCFAULT;
2254 pi->prrun.pr_flags = PRCFAULT;
2257 #ifdef PROCFS_USE_READ_WRITE
2258 if (write (pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
2260 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2262 perror_with_name (pi->pathname);
2266 /* Claim it exited (don't call wait). */
2268 printf_filtered ("(attached process has exited)\n");
2270 *rtnvalp = inferior_pid;
2274 *rtnvalp = wait (statvalp);
2279 /* Close ALL open proc file handles,
2280 except the one that called SYS_exit. */
2281 for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi)
2283 next_pi = temp_pi->next;
2285 continue; /* Handled below */
2286 close_proc_file (temp_pi);
2295 procfs_exec_handler - handle exit from the exec family of syscalls
2299 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2303 This routine is called when an inferior process is about to finish any
2304 of the exec() family of system calls. It pretends that we got a
2305 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2306 to tell procfs_wait to wake up.
2309 This need for compatibility with ptrace is questionable. In the
2310 future, it shouldn't be necessary.
2315 procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2316 struct procinfo *pi;
2322 *statvalp = (SIGTRAP << 8) | 0177;
2327 #if defined(SYS_sproc) && !defined(UNIXWARE)
2328 /* IRIX lwp creation system call */
2334 procfs_sproc_handler - handle exit from the sproc syscall
2338 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2342 This routine is called when an inferior process is about to finish an
2343 sproc() system call. This is the system call that IRIX uses to create
2344 a lightweight process. When the target process gets this event, we can
2345 look at rval1 to find the new child processes ID, and create a new
2346 procinfo struct from that.
2348 After that, it pretends that we got a SIGTRAP, and returns non-zero
2349 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2350 woken up, sees the new process and continues it.
2353 We actually never see the child exiting from sproc because we will
2354 shortly stop the child with PIOCSTOP, which is then registered as the
2359 procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2360 struct procinfo *pi;
2366 /* We've just detected the completion of an sproc system call. Now we need to
2367 setup a procinfo struct for this thread, and notify the thread system of the
2370 /* If sproc failed, then nothing interesting happened. Continue the process
2371 and go back to sleep. */
2373 if (pi->prstatus.pr_errno != 0)
2375 pi->prrun.pr_flags &= PRSTEP;
2376 pi->prrun.pr_flags |= PRCFAULT;
2378 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2379 perror_with_name (pi->pathname);
2384 /* At this point, the new thread is stopped at it's first instruction, and
2385 the parent is stopped at the exit from sproc. */
2387 /* Notify the caller of the arrival of a new thread. */
2388 create_procinfo (pi->prstatus.pr_rval1);
2390 *rtnvalp = pi->prstatus.pr_rval1;
2391 *statvalp = (SIGTRAP << 8) | 0177;
2400 procfs_fork_handler - handle exit from the fork syscall
2404 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2408 This routine is called when an inferior process is about to finish a
2409 fork() system call. We will open up the new process, and then close
2410 it, which releases it from the clutches of the debugger.
2412 After that, we continue the target process as though nothing had
2416 This is necessary for IRIX because we have to set PR_FORK in order
2417 to catch the creation of lwps (via sproc()). When an actual fork
2418 occurs, it becomes necessary to reset the forks debugger flags and
2419 continue it because we can't hack multiple processes yet.
2423 procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2424 struct procinfo *pi;
2430 struct procinfo *pitemp;
2432 /* At this point, we've detected the completion of a fork (or vfork) call in
2433 our child. The grandchild is also stopped because we set inherit-on-fork
2434 earlier. (Note that nobody has the grandchilds' /proc file open at this
2435 point.) We will release the grandchild from the debugger by opening it's
2436 /proc file and then closing it. Since run-on-last-close is set, the
2437 grandchild continues on its' merry way. */
2440 pitemp = create_procinfo (pi->prstatus.pr_rval1);
2442 close_proc_file (pitemp);
2444 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
2445 perror_with_name (pi->pathname);
2449 #endif /* SYS_sproc && !UNIXWARE */
2455 procfs_set_inferior_syscall_traps - setup the syscall traps
2459 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2463 Called for each "procinfo" (process, thread, or LWP) in the
2464 inferior, to register for notification of and handlers for
2465 syscall traps in the inferior.
2470 procfs_set_inferior_syscall_traps (pip)
2471 struct procinfo *pip;
2473 procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
2474 procfs_exit_handler);
2476 #ifndef PRFS_STOPEXEC
2478 procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
2479 procfs_exec_handler);
2482 procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT,
2483 procfs_exec_handler);
2486 procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
2487 procfs_exec_handler);
2489 #endif /* PRFS_STOPEXEC */
2491 /* Setup traps on exit from sproc() */
2494 procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT,
2495 procfs_sproc_handler);
2496 procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT,
2497 procfs_fork_handler);
2499 procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT,
2500 procfs_fork_handler);
2502 /* Turn on inherit-on-fork flag so that all children of the target process
2503 start with tracing flags set. This allows us to trap lwp creation. Note
2504 that we also have to trap on fork and vfork in order to disable all tracing
2505 in the targets child processes. */
2507 modify_inherit_on_fork_flag (pip->ctl_fd, 1);
2510 #ifdef SYS_lwp_create
2511 procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
2512 procfs_lwp_creation_handler);
2520 procfs_init_inferior - initialize target vector and access to a
2525 void procfs_init_inferior (int pid)
2529 When gdb starts an inferior, this function is called in the parent
2530 process immediately after the fork. It waits for the child to stop
2531 on the return from the exec system call (the child itself takes care
2532 of ensuring that this is set up), then sets up the set of signals
2533 and faults that are to be traced. Returns the pid, which may have had
2534 the thread-id added to it.
2538 If proc_init_failed ever gets called, control returns to the command
2539 processing loop via the standard error handling code.
2544 procfs_init_inferior (pid)
2547 struct procinfo *pip;
2549 push_target (&procfs_ops);
2551 pip = create_procinfo (pid);
2553 procfs_set_inferior_syscall_traps (pip);
2555 /* create_procinfo may change the pid, so we have to update inferior_pid
2556 here before calling other gdb routines that need the right pid. */
2561 add_thread (pip -> pid); /* Setup initial thread */
2563 #ifdef START_INFERIOR_TRAPS_EXPECTED
2564 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
2566 /* One trap to exec the shell, one to exec the program being debugged. */
2567 startup_inferior (2);
2575 procfs_notice_signals
2579 static void procfs_notice_signals (int pid);
2583 When the user changes the state of gdb's signal handling via the
2584 "handle" command, this function gets called to see if any change
2585 in the /proc interface is required. It is also called internally
2586 by other /proc interface functions to initialize the state of
2587 the traced signal set.
2589 One thing it does is that signals for which the state is "nostop",
2590 "noprint", and "pass", have their trace bits reset in the pr_trace
2591 field, so that they are no longer traced. This allows them to be
2592 delivered directly to the inferior without the debugger ever being
2597 procfs_notice_signals (pid)
2600 struct procinfo *pi;
2601 struct sig_ctl sctl;
2603 pi = find_procinfo (pid, 0);
2606 premptyset (&sctl.sigset);
2608 sctl.sigset = pi->prrun.pr_trace;
2611 notice_signals (pi, &sctl);
2614 pi->prrun.pr_trace = sctl.sigset;
2619 notice_signals (pi, sctl)
2620 struct procinfo *pi;
2621 struct sig_ctl *sctl;
2625 for (signo = 0; signo < NSIG; signo++)
2627 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
2628 signal_print_state (target_signal_from_host (signo)) == 0 &&
2629 signal_pass_state (target_signal_from_host (signo)) == 1)
2631 prdelset (&sctl->sigset, signo);
2635 praddset (&sctl->sigset, signo);
2638 #ifdef PROCFS_USE_READ_WRITE
2639 sctl->cmd = PCSTRACE;
2640 if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0)
2642 if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset))
2645 print_sys_errmsg ("PIOCSTRACE failed", errno);
2653 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2657 void proc_set_exec_trap (void)
2661 This function is called in the child process when starting up
2662 an inferior, prior to doing the exec of the actual inferior.
2663 It sets the child process's exitset to make exit from the exec
2664 system call an event of interest to stop on, and then simply
2665 returns. The child does the exec, the system call returns, and
2666 the child stops at the first instruction, ready for the gdb
2667 parent process to take control of it.
2671 We need to use all local variables since the child may be sharing
2672 it's data space with the parent, if vfork was used rather than
2675 Also note that we want to turn off the inherit-on-fork flag in
2676 the child process so that any grand-children start with all
2677 tracing flags cleared.
2681 proc_set_exec_trap ()
2683 struct sys_ctl exitset;
2684 struct sys_ctl entryset;
2685 char procname[MAX_PROC_NAME_SIZE];
2688 sprintf (procname, CTL_PROC_NAME_FMT, getpid ());
2690 if ((fd = open (procname, O_WRONLY)) < 0)
2692 if ((fd = open (procname, O_RDWR)) < 0)
2696 gdb_flush (gdb_stderr);
2699 premptyset (&exitset.sysset);
2700 premptyset (&entryset.sysset);
2702 #ifdef PRFS_STOPEXEC
2703 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2704 exits from exec system calls because of the user level loader. */
2708 if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
2711 gdb_flush (gdb_stderr);
2714 prfs_flags |= PRFS_STOPEXEC;
2715 if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
2718 gdb_flush (gdb_stderr);
2722 #else /* PRFS_STOPEXEC */
2724 Not all systems with /proc have all the exec* syscalls with the same
2725 names. On the SGI, for example, there is no SYS_exec, but there
2726 *is* a SYS_execv. So, we try to account for that. */
2729 praddset (&exitset.sysset, SYS_exec);
2732 praddset (&exitset.sysset, SYS_execve);
2735 praddset (&exitset.sysset, SYS_execv);
2738 #ifdef PROCFS_USE_READ_WRITE
2739 exitset.cmd = PCSEXIT;
2740 if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0)
2742 if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0)
2746 gdb_flush (gdb_stderr);
2749 #endif /* PRFS_STOPEXEC */
2751 praddset (&entryset.sysset, SYS_exit);
2753 #ifdef PROCFS_USE_READ_WRITE
2754 entryset.cmd = PCSENTRY;
2755 if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0)
2757 if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0)
2761 gdb_flush (gdb_stderr);
2765 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2766 start with tracing flags cleared. */
2768 modify_inherit_on_fork_flag (fd, 0);
2770 /* Turn on run-on-last-close flag so that this process will not hang
2771 if GDB goes away for some reason. */
2773 modify_run_on_last_close_flag (fd, 1);
2775 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2776 /* NOTE: revisit when doing thread support for UW */
2780 struct proc_ctl pctl;
2782 /* Solaris needs this to make procfs treat all threads seperately. Without
2783 this, all threads halt whenever something happens to any thread. Since
2784 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2786 pr_flags = PR_ASYNC;
2787 #ifdef PROCFS_USE_READ_WRITE
2789 pctl.data = PR_FORK|PR_ASYNC;
2790 write (fd, (char *) &pctl, sizeof (struct proc_ctl));
2792 ioctl (fd, PIOCSET, &pr_flags);
2795 #endif /* PR_ASYNC */
2796 #endif /* !UNIXWARE */
2803 proc_iterate_over_mappings -- call function for every mapped space
2807 int proc_iterate_over_mappings (int (*func)())
2811 Given a pointer to a function, call that function for every
2812 mapped address space, passing it an open file descriptor for
2813 the file corresponding to that mapped address space (if any)
2814 and the base address of the mapped space. Quit when we hit
2815 the end of the mappings or the function returns nonzero.
2820 proc_iterate_over_mappings (func)
2821 int (*func) PARAMS ((int, CORE_ADDR));
2828 struct procinfo *pi;
2831 pi = current_procinfo;
2833 if (fstat (pi->map_fd, &sbuf) < 0)
2836 nmap = sbuf.st_size / sizeof (prmap_t);
2837 prmaps = (prmap_t *) alloca (nmap * sizeof(prmap_t));
2838 if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) &&
2839 (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) ==
2840 (nmap * sizeof (prmap_t))))
2843 for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i)
2845 char name[sizeof ("/proc/1234567890/object") +
2846 sizeof (prmap->pr_mapname)];
2847 sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname);
2848 if ((fd = open (name, O_RDONLY)) == -1)
2853 funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
2859 #else /* UNIXWARE */
2861 proc_iterate_over_mappings (func)
2862 int (*func) PARAMS ((int, CORE_ADDR));
2867 struct prmap *prmaps;
2868 struct prmap *prmap;
2869 struct procinfo *pi;
2871 pi = current_procinfo;
2873 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
2875 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2876 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
2878 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
2880 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
2881 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
2888 #endif /* UNIXWARE */
2890 #if 0 /* Currently unused */
2895 proc_base_address -- find base address for segment containing address
2899 CORE_ADDR proc_base_address (CORE_ADDR addr)
2903 Given an address of a location in the inferior, find and return
2904 the base address of the mapped segment containing that address.
2906 This is used for example, by the shared library support code,
2907 where we have the pc value for some location in the shared library
2908 where we are stopped, and need to know the base address of the
2909 segment containing that address.
2913 proc_base_address (addr)
2917 struct prmap *prmaps;
2918 struct prmap *prmap;
2919 CORE_ADDR baseaddr = 0;
2920 struct procinfo *pi;
2922 pi = current_procinfo;
2924 if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
2926 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2927 if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
2929 for (prmap = prmaps; prmap -> pr_size; ++prmap)
2931 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
2932 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
2934 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
2950 proc_address_to_fd -- return open fd for file mapped to address
2954 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2958 Given an address in the current inferior's address space, use the
2959 /proc interface to find an open file descriptor for the file that
2960 this address was mapped in from. Return -1 if there is no current
2961 inferior. Print a warning message if there is an inferior but
2962 the address corresponds to no file (IE a bogus address).
2967 proc_address_to_fd (pi, addr, complain)
2968 struct procinfo *pi;
2974 if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
2978 print_sys_errmsg (pi->pathname, errno);
2979 warning ("can't find mapped file for address 0x%x", addr);
2984 #endif /* !UNIXWARE */
2986 /* Attach to process PID, then initialize for debugging it
2987 and wait for the trace-trap that results from attaching. */
2990 procfs_attach (args, from_tty)
2998 error_no_arg ("process-id to attach");
3002 if (pid == getpid()) /* Trying to masturbate? */
3003 error ("I refuse to debug myself!");
3007 exec_file = (char *) get_exec_file (0);
3010 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
3012 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
3014 gdb_flush (gdb_stdout);
3017 inferior_pid = pid = do_attach (pid);
3018 push_target (&procfs_ops);
3022 /* Take a program previously attached to and detaches it.
3023 The program resumes execution and will no longer stop
3024 on signals, etc. We'd better not have left any breakpoints
3025 in the program or it'll die when it hits one. For this
3026 to work, it may be necessary for the process to have been
3027 previously attached. It *might* work if the program was
3028 started via the normal ptrace (PTRACE_TRACEME). */
3031 procfs_detach (args, from_tty)
3039 char *exec_file = get_exec_file (0);
3042 printf_unfiltered ("Detaching from program: %s %s\n",
3043 exec_file, target_pid_to_str (inferior_pid));
3044 gdb_flush (gdb_stdout);
3047 siggnal = atoi (args);
3049 do_detach (siggnal);
3051 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
3054 /* Get ready to modify the registers array. On machines which store
3055 individual registers, this doesn't need to do anything. On machines
3056 which store all the registers in one fell swoop, this makes sure
3057 that registers contains all the registers from the program being
3061 procfs_prepare_to_store ()
3063 #ifdef CHILD_PREPARE_TO_STORE
3064 CHILD_PREPARE_TO_STORE ();
3068 /* Print status information about what we're accessing. */
3071 procfs_files_info (ignore)
3072 struct target_ops *ignore;
3074 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3075 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
3080 procfs_open (arg, from_tty)
3084 error ("Use the \"run\" command to start a Unix child process.");
3091 do_attach -- attach to an already existing process
3095 int do_attach (int pid)
3099 Attach to an already existing process with the specified process
3100 id. If the process is not already stopped, query whether to
3105 The option of stopping at attach time is specific to the /proc
3106 versions of gdb. Versions using ptrace force the attachee
3107 to stop. (I have changed this version to do so, too. All you
3116 struct procinfo *pi;
3117 struct sig_ctl sctl;
3118 struct flt_ctl fctl;
3121 pi = init_procinfo (pid, 0);
3124 nlwp = pi->prstatus.pr_nlwp;
3125 lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
3127 if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
3129 print_sys_errmsg (pi -> pathname, errno);
3130 error ("PIOCLWPIDS failed");
3132 #else /* PIOCLWPIDS */
3134 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
3137 for (; nlwp > 0; nlwp--, lwps++)
3139 /* First one has already been created above. */
3140 if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
3141 pi = init_procinfo ((*lwps << 16) | pid, 0);
3144 if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
3146 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3149 pi->was_stopped = 1;
3153 pi->was_stopped = 0;
3154 if (1 || query ("Process is currently running, stop it? "))
3157 /* Make it run again when we close it. */
3158 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3159 #ifdef PROCFS_USE_READ_WRITE
3161 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3163 if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
3166 print_sys_errmsg (pi->pathname, errno);
3167 close_proc_file (pi);
3168 error ("PIOCSTOP failed");
3171 if (!procfs_read_status (pi))
3173 print_sys_errmsg (pi->pathname, errno);
3174 close_proc_file (pi);
3175 error ("procfs_read_status failed");
3178 pi->nopass_next_sigstop = 1;
3182 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3183 target_pid_to_str (pi->pid));
3187 #ifdef PROCFS_USE_READ_WRITE
3188 fctl.cmd = PCSFAULT;
3189 if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
3190 print_sys_errmsg ("PCSFAULT failed", errno);
3191 #else /* PROCFS_USE_READ_WRITE */
3192 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
3194 print_sys_errmsg ("PIOCSFAULT failed", errno);
3196 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
3198 print_sys_errmsg ("PIOCSTRACE failed", errno);
3200 add_thread (pi->pid);
3201 procfs_set_inferior_syscall_traps (pi);
3202 #endif /* PROCFS_USE_READ_WRITE */
3212 do_detach -- detach from an attached-to process
3216 void do_detach (int signal)
3220 Detach from the current attachee.
3222 If signal is non-zero, the attachee is started running again and sent
3223 the specified signal.
3225 If signal is zero and the attachee was not already stopped when we
3226 attached to it, then we make it runnable again when we detach.
3228 Otherwise, we query whether or not to make the attachee runnable
3229 again, since we may simply want to leave it in the state it was in
3232 We report any problems, but do not consider them errors, since we
3233 MUST detach even if some things don't seem to go right. This may not
3234 be the ideal situation. (FIXME).
3241 struct procinfo *pi;
3243 for (pi = procinfo_list; pi; pi = pi->next)
3247 set_proc_siginfo (pi, signal);
3249 #ifdef PROCFS_USE_READ_WRITE
3250 pi->saved_exitset.cmd = PCSEXIT;
3251 if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
3252 sizeof (struct sys_ctl)) < 0)
3254 if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
3257 print_sys_errmsg (pi->pathname, errno);
3258 printf_unfiltered ("PIOCSEXIT failed.\n");
3260 #ifdef PROCFS_USE_READ_WRITE
3261 pi->saved_entryset.cmd = PCSENTRY;
3262 if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
3263 sizeof (struct sys_ctl)) < 0)
3265 if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
3268 print_sys_errmsg (pi->pathname, errno);
3269 printf_unfiltered ("PIOCSENTRY failed.\n");
3271 #ifdef PROCFS_USE_READ_WRITE
3272 pi->saved_trace.cmd = PCSTRACE;
3273 if (write (pi->ctl_fd, (char *) &pi->saved_trace,
3274 sizeof (struct sig_ctl)) < 0)
3276 if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
3279 print_sys_errmsg (pi->pathname, errno);
3280 printf_unfiltered ("PIOCSTRACE failed.\n");
3283 if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
3285 print_sys_errmsg (pi->pathname, errno);
3286 printf_unfiltered ("PIOSCHOLD failed.\n");
3289 #ifdef PROCFS_USE_READ_WRITE
3290 pi->saved_fltset.cmd = PCSFAULT;
3291 if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
3292 sizeof (struct flt_ctl)) < 0)
3294 if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
3297 print_sys_errmsg (pi->pathname, errno);
3298 printf_unfiltered ("PIOCSFAULT failed.\n");
3300 if (!procfs_read_status (pi))
3302 print_sys_errmsg (pi->pathname, errno);
3303 printf_unfiltered ("procfs_read_status failed.\n");
3308 if (signal || (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
3310 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
3314 struct proc_ctl pctl;
3316 if (signal || !pi->was_stopped ||
3317 query ("Was stopped when attached, make it runnable again? "))
3319 /* Clear any pending signal if we want to detach without
3322 set_proc_siginfo (pi, signal);
3324 /* Clear any fault that might have stopped it. */
3325 #ifdef PROCFS_USE_READ_WRITE
3327 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3329 if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
3332 print_sys_errmsg (pi->pathname, errno);
3333 printf_unfiltered ("PIOCCFAULT failed.\n");
3336 /* Make it run again when we close it. */
3338 modify_run_on_last_close_flag (pi->ctl_fd, 1);
3342 close_proc_file (pi);
3347 /* emulate wait() as much as possible.
3348 Wait for child to do something. Return pid of child, or -1 in case
3349 of error; store status in *OURSTATUS.
3351 Not sure why we can't
3352 just use wait(), but it seems to have problems when applied to a
3353 process being controlled with the /proc interface.
3355 We have a race problem here with no obvious solution. We need to let
3356 the inferior run until it stops on an event of interest, which means
3357 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3358 ioctl if the process is already stopped on something that is not an
3359 event of interest, or the call will hang indefinitely. Thus we first
3360 use PIOCSTATUS to see if the process is not stopped. If not, then we
3361 use PIOCWSTOP. But during the window between the two, if the process
3362 stops for any reason that is not an event of interest (such as a job
3363 control signal) then gdb will hang. One possible workaround is to set
3364 an alarm to wake up every minute of so and check to see if the process
3365 is still running, and if so, then reissue the PIOCWSTOP. But this is
3366 a real kludge, so has not been implemented. FIXME: investigate
3369 FIXME: Investigate why wait() seems to have problems with programs
3370 being control by /proc routines. */
3372 procfs_wait (pid, ourstatus)
3374 struct target_waitstatus *ourstatus;
3381 struct procinfo *pi;
3382 struct proc_ctl pctl;
3386 /* handle all syscall events first, otherwise we might not
3387 notice a thread was created until too late. */
3389 for (pi = procinfo_list; pi; pi = pi->next)
3395 if (! (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)) )
3398 why = pi->prstatus.pr_lwp.pr_why;
3399 what = pi->prstatus.pr_lwp.pr_what;
3401 if (! (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) )
3404 why = pi->prstatus.pr_why;
3405 what = pi->prstatus.pr_what;
3407 if (why == PR_SYSENTRY || why == PR_SYSEXIT)
3410 int found_handler = 0;
3412 for (i = 0; i < pi->num_syscall_handlers; i++)
3413 if (pi->syscall_handlers[i].syscall_num == what)
3416 pi->saved_rtnval = pi->pid;
3417 pi->saved_statval = 0;
3418 if (!pi->syscall_handlers[i].func
3419 (pi, what, why, &pi->saved_rtnval, &pi->saved_statval))
3426 if (why == PR_SYSENTRY)
3427 error ("PR_SYSENTRY, unhandled system call %d", what);
3429 error ("PR_SYSEXIT, unhandled system call %d", what);
3434 /* find a relevant process with an event */
3436 for (pi = procinfo_list; pi; pi = pi->next)
3437 if (pi->had_event && (pid == -1 || pi->pid == pid))
3447 if (!checkerr && !(pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
3449 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
3452 if (!procfs_write_pcwstop (pi))
3459 if (errno == ENOENT)
3461 /* XXX Fixme -- what to do if attached? Can't call wait... */
3462 rtnval = wait (&statval);
3463 if ((rtnval) != (PIDGET (inferior_pid)))
3465 print_sys_errmsg (pi->pathname, errno);
3466 error ("procfs_wait: wait failed, returned %d", rtnval);
3472 print_sys_errmsg (pi->pathname, errno);
3473 error ("PIOCSTATUS or PIOCWSTOP failed.");
3478 else if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
3480 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3484 rtnval = pi->prstatus.pr_pid;
3485 why = pi->prstatus.pr_lwp.pr_why;
3486 what = pi->prstatus.pr_lwp.pr_what;
3489 why = pi->prstatus.pr_why;
3490 what = pi->prstatus.pr_what;
3496 statval = (what << 8) | 0177;
3500 rtnval = pi->saved_rtnval;
3501 statval = pi->saved_statval;
3504 statval = (SIGSTOP << 8) | 0177;
3507 statval = (what << 8) | 0177;
3514 statval = (SIGTRAP << 8) | 0177;
3519 statval = (SIGTRAP << 8) | 0177;
3522 #ifndef FAULTED_USE_SIGINFO
3523 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3524 Solaris fills in si_signo. I'm not sure about others. */
3527 statval = (SIGILL << 8) | 0177;
3531 statval = (SIGTRAP << 8) | 0177;
3536 statval = (SIGSEGV << 8) | 0177;
3541 statval = (SIGFPE << 8) | 0177;
3543 case FLTPAGE: /* Recoverable page fault */
3544 #endif /* not FAULTED_USE_SIGINFO */
3546 /* Use the signal which the kernel assigns. This is better than
3547 trying to second-guess it from the fault. In fact, I suspect
3548 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3550 statval = ((pi->prstatus.pr_lwp.pr_info.si_signo) << 8) | 0177;
3552 statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
3558 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
3560 /* Stop all the other threads when any of them stops. */
3563 struct procinfo *procinfo, *next_pi;
3565 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3567 next_pi = procinfo->next;
3568 if (!procinfo->had_event)
3570 #ifdef PROCFS_USE_READ_WRITE
3572 if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
3574 print_sys_errmsg (procinfo->pathname, errno);
3575 error ("PCSTOP failed");
3578 /* A bug in Solaris (2.5) causes us to hang when trying to
3579 stop a stopped process. So, we have to check first in
3580 order to avoid the hang. */
3581 if (!procfs_read_status (procinfo))
3583 /* The LWP has apparently terminated. */
3585 printf_filtered ("LWP %d doesn't respond.\n",
3586 (procinfo->pid >> 16) & 0xffff);
3587 close_proc_file (procinfo);
3591 if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
3592 if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
3595 print_sys_errmsg (procinfo->pathname, errno);
3596 warning ("PIOCSTOP failed");
3605 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3607 pi->prstatus.pr_lwp.pr_flags);
3609 pi->prstatus.pr_flags);
3613 store_waitstatus (ourstatus, statval);
3615 if (rtnval == -1) /* No more children to wait for */
3617 warning ("Child process unexpectedly missing");
3618 /* Claim it exited with unknown signal. */
3619 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3620 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
3624 pi->had_event = 0; /* Indicate that we've seen this one */
3632 set_proc_siginfo - set a process's current signal info
3636 void set_proc_siginfo (struct procinfo *pip, int signo);
3640 Given a pointer to a process info struct in PIP and a signal number
3641 in SIGNO, set the process's current signal and its associated signal
3642 information. The signal will be delivered to the process immediately
3643 after execution is resumed, even if it is being held. In addition,
3644 this particular delivery will not cause another PR_SIGNALLED stop
3645 even if the signal is being traced.
3647 If we are not delivering the same signal that the prstatus siginfo
3648 struct contains information about, then synthesize a siginfo struct
3649 to match the signal we are doing to deliver, make it of the type
3650 "generated by a user process", and send this synthesized copy. When
3651 used to set the inferior's signal state, this will be required if we
3652 are not currently stopped because of a traced signal, or if we decide
3653 to continue with a different signal.
3655 Note that when continuing the inferior from a stop due to receipt
3656 of a traced signal, we either have set PRCSIG to clear the existing
3657 signal, or we have to call this function to do a PIOCSSIG with either
3658 the existing siginfo struct from pr_info, or one we have synthesized
3659 appropriately for the signal we want to deliver. Otherwise if the
3660 signal is still being traced, the inferior will immediately stop
3663 See siginfo(5) for more details.
3667 set_proc_siginfo (pip, signo)
3668 struct procinfo *pip;
3671 struct siginfo newsiginfo;
3672 struct siginfo *sip;
3673 struct sigi_ctl sictl;
3675 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3676 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3677 receives a PIOCSSIG with a signal identical to the current signal,
3678 it messes up the current signal. Work around the kernel bug. */
3680 if (signo == pip -> prstatus.pr_lwp.pr_cursig)
3682 if (signo == pip -> prstatus.pr_cursig)
3688 if (signo == pip->prstatus.pr_lwp.pr_info.si_signo)
3690 memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info,
3691 sizeof (siginfo_t));
3694 if (signo == pip -> prstatus.pr_info.si_signo)
3696 sip = &pip -> prstatus.pr_info;
3702 siginfo_t *sip = &sictl.siginfo;
3703 memset ((char *) sip, 0, sizeof (siginfo_t));
3705 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
3708 sip -> si_signo = signo;
3710 sip -> si_errno = 0;
3711 sip -> si_pid = getpid ();
3712 sip -> si_uid = getuid ();
3714 #ifdef PROCFS_USE_READ_WRITE
3716 if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0)
3718 if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0)
3721 print_sys_errmsg (pip -> pathname, errno);
3722 warning ("PIOCSSIG failed");
3726 /* Resume execution of process PID. If STEP is nozero, then
3727 just single step it. If SIGNAL is nonzero, restart it with that
3728 signal activated. */
3731 procfs_resume (pid, step, signo)
3734 enum target_signal signo;
3737 struct procinfo *pi, *procinfo, *next_pi;
3738 struct proc_ctl pctl;
3740 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3745 pctl.data = PRCFAULT;
3747 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
3751 /* It should not be necessary. If the user explicitly changes the value,
3752 value_assign calls write_register_bytes, which writes it. */
3753 /* It may not be absolutely necessary to specify the PC value for
3754 restarting, but to be safe we use the value that gdb considers
3755 to be current. One case where this might be necessary is if the
3756 user explicitly changes the PC value that gdb considers to be
3757 current. FIXME: Investigate if this is necessary or not. */
3759 #ifdef PRSVADDR_BROKEN
3760 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3761 place to put nPC. In fact, if you use this, nPC seems to be set to some
3762 random garbage. We have to rely on the fact that PC and nPC have been
3763 written previously via PIOCSREG during a register flush. */
3765 pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
3766 pi->prrun.pr_flags != PRSVADDR;
3770 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
3771 /* When attaching to a child process, if we forced it to stop with
3772 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3773 Upon resuming the first time after such a stop, we explicitly
3774 inhibit sending it another SIGSTOP, which would be the normal
3775 result of default signal handling. One potential drawback to
3776 this is that we will also ignore any attempt to by the user
3777 to explicitly continue after the attach with a SIGSTOP. Ultimately
3778 this problem should be dealt with by making the routines that
3779 deal with the inferior a little smarter, and possibly even allow
3780 an inferior to continue running at the same time as gdb. (FIXME?) */
3782 else if (signo == TARGET_SIGNAL_TSTP
3784 && pi->prstatus.pr_lwp.pr_cursig == SIGTSTP
3785 && pi->prstatus.pr_lwp.pr_action.sa_handler == SIG_DFL
3787 && pi->prstatus.pr_cursig == SIGTSTP
3788 && pi->prstatus.pr_action.sa_handler == SIG_DFL
3792 /* We are about to pass the inferior a SIGTSTP whose action is
3793 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3794 (notifying the parent via wait()), and then keep going from the
3795 same place when the parent is ready for you to keep going. So
3796 under the debugger, it should do nothing (as if the program had
3797 been stopped and then later resumed. Under ptrace, this
3798 happens for us, but under /proc, the system obligingly stops
3799 the process, and wait_for_inferior would have no way of
3800 distinguishing that type of stop (which indicates that we
3801 should just start it again), with a stop due to the pr_trace
3802 field of the prrun_t struct.
3804 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3805 because the handler needs to get executed. */
3808 signal_to_pass = target_signal_to_host (signo);
3812 set_proc_siginfo (pi, signal_to_pass);
3817 pctl.data |= PRCSIG;
3819 pi->prrun.pr_flags |= PRCSIG;
3822 pi->nopass_next_sigstop = 0;
3826 pctl.data |= PRSTEP;
3828 pi->prrun.pr_flags |= PRSTEP;
3832 /* Don't try to start a process unless it's stopped on an
3833 `event of interest'. Doing so will cause errors. */
3835 if (!procfs_read_status (pi))
3837 /* The LWP has apparently terminated. */
3839 printf_filtered ("LWP %d doesn't respond.\n",
3840 (pi->pid >> 16) & 0xffff);
3841 close_proc_file (pi);
3845 #ifdef PROCFS_USE_READ_WRITE
3846 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
3848 if ((pi->prstatus.pr_flags & PR_ISTOP)
3849 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
3852 /* The LWP has apparently terminated. */
3854 printf_filtered ("LWP %d doesn't respond.\n",
3855 (pi->pid >> 16) & 0xffff);
3856 close_proc_file (pi);
3860 /* Continue all the other threads that haven't had an event of interest.
3861 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3862 set by do_attach, and means this is the first resume after an attach.
3863 All threads were CSTOP'd by do_attach, and should be resumed now. */
3866 for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
3868 next_pi = procinfo->next;
3870 if (!procinfo->had_event ||
3871 (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
3873 procinfo->had_event = procinfo->nopass_next_sigstop = 0;
3874 #ifdef PROCFS_USE_READ_WRITE
3875 pctl.data = PRCFAULT | PRCSIG;
3876 if (write (procinfo->ctl_fd, (char *) &pctl,
3877 sizeof (struct proc_ctl)) < 0)
3879 if (!procfs_read_status (procinfo))
3880 fprintf_unfiltered(gdb_stderr,
3881 "procfs_read_status failed, errno=%d\n",
3883 print_sys_errmsg (procinfo->pathname, errno);
3884 error ("PCRUN failed");
3887 procinfo->prrun.pr_flags &= PRSTEP;
3888 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
3889 if (!procfs_read_status (procinfo))
3891 /* The LWP has apparently terminated. */
3893 printf_filtered ("LWP %d doesn't respond.\n",
3894 (procinfo->pid >> 16) & 0xffff);
3895 close_proc_file (procinfo);
3899 /* Don't try to start a process unless it's stopped on an
3900 `event of interest'. Doing so will cause errors. */
3902 if ((procinfo->prstatus.pr_flags & PR_ISTOP)
3903 && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
3905 if (!procfs_read_status (procinfo))
3906 fprintf_unfiltered(gdb_stderr,
3907 "procfs_read_status failed, errno=%d\n",
3909 print_sys_errmsg (procinfo->pathname, errno);
3910 warning ("PIOCRUN failed");
3914 procfs_read_status (procinfo);
3922 procfs_fetch_registers -- fetch current registers from inferior
3926 void procfs_fetch_registers (int regno)
3930 Read the current values of the inferior's registers, both the
3931 general register set and floating point registers (if supported)
3932 and update gdb's idea of their current values.
3937 procfs_fetch_registers (regno)
3940 struct procinfo *pi;
3942 pi = current_procinfo;
3945 if (procfs_read_status (pi))
3947 supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
3948 #if defined (FP0_REGNUM)
3949 supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs);
3952 #else /* UNIXWARE */
3953 if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1)
3955 supply_gregset (&pi->gregset.gregset);
3957 #if defined (FP0_REGNUM)
3958 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1)
3960 supply_fpregset (&pi->fpregset.fpregset);
3963 #endif /* UNIXWARE */
3970 proc_init_failed - called when /proc access initialization fails
3975 static void proc_init_failed (struct procinfo *pi,
3976 char *why, int kill_p)
3980 This function is called whenever initialization of access to a /proc
3981 entry fails. It prints a suitable error message, does some cleanup,
3982 and then invokes the standard error processing routine which dumps
3983 us back into the command loop. If KILL_P is true, sends SIGKILL.
3987 proc_init_failed (pi, why, kill_p)
3988 struct procinfo *pi;
3992 print_sys_errmsg (pi->pathname, errno);
3994 kill (pi->pid, SIGKILL);
3995 close_proc_file (pi);
4004 close_proc_file - close any currently open /proc entry
4008 static void close_proc_file (struct procinfo *pip)
4012 Close any currently open /proc entry and mark the process information
4013 entry as invalid. In order to ensure that we don't try to reuse any
4014 stale information, the pid, fd, and pathnames are explicitly
4015 invalidated, which may be overkill.
4020 close_proc_file (pip)
4021 struct procinfo *pip;
4023 struct procinfo *procinfo;
4025 delete_thread (pip->pid); /* remove thread from GDB's thread list */
4026 remove_fd (pip); /* Remove fd from poll/select list */
4028 close (pip->ctl_fd);
4029 #ifdef HAVE_MULTIPLE_PROC_FDS
4031 close (pip->status_fd);
4032 close (pip->map_fd);
4035 free (pip -> pathname);
4037 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4039 if (procinfo_list == pip)
4040 procinfo_list = pip->next;
4043 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
4045 if (procinfo->next == pip)
4047 procinfo->next = pip->next;
4059 open_proc_file - open a /proc entry for a given process id
4063 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4067 Given a process id and a mode, close the existing open /proc
4068 entry (if any) and open one for the new process id, in the
4069 specified mode. Once it is open, then mark the local process
4070 information structure as valid, which guarantees that the pid,
4071 fd, and pathname fields match an open /proc entry. Returns
4072 zero if the open fails, nonzero otherwise.
4074 Note that the pathname is left intact, even when the open fails,
4075 so that callers can use it to construct meaningful error messages
4076 rather than just "file open failed".
4078 Note that for Solaris, the process-id also includes an LWP-id, so we
4079 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4080 then we will ask the kernel what it is and add it to the pid. Hence,
4081 the pid can be changed by us.
4085 open_proc_file (pid, pip, mode, control)
4087 struct procinfo *pip;
4094 pip -> had_event = 0;
4095 pip -> pathname = xmalloc (MAX_PROC_NAME_SIZE);
4104 #ifdef HAVE_MULTIPLE_PROC_FDS
4105 sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp);
4106 if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0)
4111 sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp);
4112 if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0)
4114 close (pip->status_fd);
4118 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4119 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4121 close (pip->status_fd);
4126 sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
4127 if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
4129 close (pip->status_fd);
4136 sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
4137 if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0)
4139 close (pip->status_fd);
4141 close (pip->map_fd);
4146 #else /* HAVE_MULTIPLE_PROC_FDS */
4147 sprintf (pip -> pathname, CTL_PROC_NAME_FMT, tmp);
4149 if ((tmpfd = open (pip -> pathname, mode)) < 0)
4153 pip -> ctl_fd = tmpfd;
4154 pip -> as_fd = tmpfd;
4155 pip -> map_fd = tmpfd;
4156 pip -> status_fd = tmpfd;
4158 tmp = (pid >> 16) & 0xffff; /* Extract thread id */
4161 { /* Don't know thread id yet */
4162 if (ioctl (tmpfd, PIOCSTATUS, &pip -> prstatus) < 0)
4164 print_sys_errmsg (pip -> pathname, errno);
4166 error ("open_proc_file: PIOCSTATUS failed");
4169 tmp = pip -> prstatus.pr_who; /* Get thread id from prstatus_t */
4170 pip -> pid = (tmp << 16) | pid; /* Update pip */
4173 if ((pip -> ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0)
4179 #ifdef PIOCSET /* New method */
4182 pr_flags = PR_ASYNC;
4183 ioctl (pip -> ctl_fd, PIOCSET, &pr_flags);
4187 /* keep extra fds in sync */
4188 pip->as_fd = pip->ctl_fd;
4189 pip->map_fd = pip->ctl_fd;
4190 pip->status_fd = pip->ctl_fd;
4192 close (tmpfd); /* All done with main pid */
4193 #endif /* PIOCOPENLWP */
4195 #endif /* HAVE_MULTIPLE_PROC_FDS */
4201 mappingflags (flags)
4204 static char asciiflags[8];
4206 strcpy (asciiflags, "-------");
4207 #if defined (MA_PHYS)
4208 if (flags & MA_PHYS) asciiflags[0] = 'd';
4210 if (flags & MA_STACK) asciiflags[1] = 's';
4211 if (flags & MA_BREAK) asciiflags[2] = 'b';
4212 if (flags & MA_SHARED) asciiflags[3] = 's';
4213 if (flags & MA_READ) asciiflags[4] = 'r';
4214 if (flags & MA_WRITE) asciiflags[5] = 'w';
4215 if (flags & MA_EXEC) asciiflags[6] = 'x';
4216 return (asciiflags);
4220 info_proc_flags (pip, summary)
4221 struct procinfo *pip;
4224 struct trans *transp;
4226 long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags;
4228 long flags = pip->prstatus.pr_flags;
4231 printf_filtered ("%-32s", "Process status flags:");
4234 printf_filtered ("\n\n");
4236 for (transp = pr_flag_table; transp -> name != NULL; transp++)
4238 if (flags & transp -> value)
4242 printf_filtered ("%s ", transp -> name);
4246 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
4250 printf_filtered ("\n");
4254 info_proc_stop (pip, summary)
4255 struct procinfo *pip;
4258 struct trans *transp;
4263 why = pip -> prstatus.pr_lwp.pr_why;
4264 what = pip -> prstatus.pr_lwp.pr_what;
4266 why = pip -> prstatus.pr_why;
4267 what = pip -> prstatus.pr_what;
4271 if (pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED)
4273 if (pip -> prstatus.pr_flags & PR_STOPPED)
4276 printf_filtered ("%-32s", "Reason for stopping:");
4279 printf_filtered ("\n\n");
4281 for (transp = pr_why_table; transp -> name != NULL; transp++)
4283 if (why == transp -> value)
4287 printf_filtered ("%s ", transp -> name);
4291 printf_filtered ("\t%-16s %s.\n",
4292 transp -> name, transp -> desc);
4298 /* Use the pr_why field to determine what the pr_what field means, and
4299 print more information. */
4304 /* pr_what is unused for this case */
4310 printf_filtered ("%s ", signalname (what));
4314 printf_filtered ("\t%-16s %s.\n", signalname (what),
4315 safe_strsignal (what));
4321 printf_filtered ("%s ", syscallname (what));
4325 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4326 "Entered this system call");
4332 printf_filtered ("%s ", syscallname (what));
4336 printf_filtered ("\t%-16s %s.\n", syscallname (what),
4337 "Returned from this system call");
4343 printf_filtered ("%s ",
4344 lookupname (faults_table, what, "fault"));
4348 printf_filtered ("\t%-16s %s.\n",
4349 lookupname (faults_table, what, "fault"),
4350 lookupdesc (faults_table, what));
4354 printf_filtered ("\n");
4359 info_proc_siginfo (pip, summary)
4360 struct procinfo *pip;
4363 struct siginfo *sip;
4366 if ((pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED) &&
4367 (pip -> prstatus.pr_lwp.pr_why == PR_SIGNALLED ||
4368 pip -> prstatus.pr_lwp.pr_why == PR_FAULTED))
4370 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
4371 (pip -> prstatus.pr_why == PR_SIGNALLED ||
4372 pip -> prstatus.pr_why == PR_FAULTED))
4375 printf_filtered ("%-32s", "Additional signal/fault info:");
4377 sip = &pip -> prstatus.pr_lwp.pr_info;
4379 sip = &pip -> prstatus.pr_info;
4383 printf_filtered ("%s ", signalname (sip -> si_signo));
4384 if (sip -> si_errno > 0)
4386 printf_filtered ("%s ", errnoname (sip -> si_errno));
4388 if (sip -> si_code <= 0)
4390 printf_filtered ("sent by %s, uid %d ",
4391 target_pid_to_str (sip -> si_pid),
4396 printf_filtered ("%s ", sigcodename (sip));
4397 if ((sip -> si_signo == SIGILL) ||
4398 (sip -> si_signo == SIGFPE) ||
4399 (sip -> si_signo == SIGSEGV) ||
4400 (sip -> si_signo == SIGBUS))
4402 printf_filtered ("addr=%#lx ",
4403 (unsigned long) sip -> si_addr);
4405 else if ((sip -> si_signo == SIGCHLD))
4407 printf_filtered ("child %s, status %u ",
4408 target_pid_to_str (sip -> si_pid),
4411 else if ((sip -> si_signo == SIGPOLL))
4413 printf_filtered ("band %u ", sip -> si_band);
4419 printf_filtered ("\n\n");
4420 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
4421 safe_strsignal (sip -> si_signo));
4422 if (sip -> si_errno > 0)
4424 printf_filtered ("\t%-16s %s.\n",
4425 errnoname (sip -> si_errno),
4426 safe_strerror (sip -> si_errno));
4428 if (sip -> si_code <= 0)
4430 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
4431 "PID of process sending signal");
4432 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
4433 "UID of process sending signal");
4437 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
4439 if ((sip -> si_signo == SIGILL) ||
4440 (sip -> si_signo == SIGFPE))
4442 printf_filtered ("\t%#-16lx %s.\n",
4443 (unsigned long) sip -> si_addr,
4444 "Address of faulting instruction");
4446 else if ((sip -> si_signo == SIGSEGV) ||
4447 (sip -> si_signo == SIGBUS))
4449 printf_filtered ("\t%#-16lx %s.\n",
4450 (unsigned long) sip -> si_addr,
4451 "Address of faulting memory reference");
4453 else if ((sip -> si_signo == SIGCHLD))
4455 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
4456 "Child process ID");
4457 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
4458 "Child process exit value or signal");
4460 else if ((sip -> si_signo == SIGPOLL))
4462 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
4463 "Band event for POLL_{IN,OUT,MSG}");
4467 printf_filtered ("\n");
4472 info_proc_syscalls (pip, summary)
4473 struct procinfo *pip;
4481 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4482 if (pip -> prstatus.pr_flags & PR_ASLEEP)
4484 int syscallnum = pip -> prstatus.pr_reg[R_D0];
4487 printf_filtered ("%-32s", "Sleeping in system call:");
4488 printf_filtered ("%s", syscallname (syscallnum));
4492 printf_filtered ("Sleeping in system call '%s'.\n",
4493 syscallname (syscallnum));
4499 if (ioctl (pip -> ctl_fd, PIOCGENTRY, &pip -> entryset) < 0)
4501 print_sys_errmsg (pip -> pathname, errno);
4502 error ("PIOCGENTRY failed");
4505 if (ioctl (pip -> ctl_fd, PIOCGEXIT, &pip -> exitset) < 0)
4507 print_sys_errmsg (pip -> pathname, errno);
4508 error ("PIOCGEXIT failed");
4512 printf_filtered ("System call tracing information:\n\n");
4514 printf_filtered ("\t%-12s %-8s %-8s\n",
4518 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
4521 if (syscall_table[syscallnum] != NULL)
4522 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
4524 printf_filtered ("\t%-12d ", syscallnum);
4527 printf_filtered ("%-8s ",
4528 prismember (&pip->prstatus.pr_sysentry, syscallnum)
4530 printf_filtered ("%-8s ",
4531 prismember (&pip->prstatus.pr_sysexit, syscallnum)
4534 printf_filtered ("%-8s ",
4535 prismember (&pip -> entryset, syscallnum)
4537 printf_filtered ("%-8s ",
4538 prismember (&pip -> exitset, syscallnum)
4541 printf_filtered ("\n");
4543 printf_filtered ("\n");
4552 static char locbuf[32];
4554 name = strsigno (signo);
4557 sprintf (locbuf, "Signal %d", signo);
4561 sprintf (locbuf, "%s (%d)", name, signo);
4571 static char locbuf[32];
4573 name = strerrno (errnum);
4576 sprintf (locbuf, "Errno %d", errnum);
4580 sprintf (locbuf, "%s (%d)", name, errnum);
4586 info_proc_signals (pip, summary)
4587 struct procinfo *pip;
4594 #ifndef PROCFS_USE_READ_WRITE
4595 if (ioctl (pip -> ctl_fd, PIOCGTRACE, &pip -> trace) < 0)
4597 print_sys_errmsg (pip -> pathname, errno);
4598 error ("PIOCGTRACE failed");
4602 printf_filtered ("Disposition of signals:\n\n");
4603 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4604 "Signal", "Trace", "Hold", "Pending", "Description");
4605 for (signo = 0; signo < NSIG; signo++)
4608 printf_filtered ("\t%-15s ", signalname (signo));
4610 printf_filtered ("%-8s ",
4611 prismember (&pip -> prstatus.pr_sigtrace, signo)
4613 printf_filtered ("%-8s ",
4614 prismember (&pip -> prstatus.pr_lwp.pr_context.uc_sigmask, signo)
4617 printf_filtered ("%-8s ",
4618 prismember (&pip -> trace, signo)
4620 printf_filtered ("%-8s ",
4621 prismember (&pip -> prstatus.pr_sighold, signo)
4626 if (prismember (&pip->prstatus.pr_sigpend, signo) ||
4627 prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo))
4628 printf_filtered("%-8s ", "yes");
4630 printf_filtered("%-8s ", "no");
4631 #else /* UNIXWARE */
4632 #ifdef PROCFS_SIGPEND_OFFSET
4633 /* Alpha OSF/1 numbers the pending signals from 1. */
4634 printf_filtered ("%-8s ",
4635 (signo ? prismember (&pip -> prstatus.pr_sigpend,
4640 printf_filtered ("%-8s ",
4641 prismember (&pip -> prstatus.pr_sigpend, signo)
4644 #endif /* UNIXWARE */
4645 printf_filtered (" %s\n", safe_strsignal (signo));
4647 printf_filtered ("\n");
4652 info_proc_faults (pip, summary)
4653 struct procinfo *pip;
4656 struct trans *transp;
4661 if (ioctl (pip -> ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0)
4663 print_sys_errmsg (pip -> pathname, errno);
4664 error ("PIOCGFAULT failed");
4668 printf_filtered ("Current traced hardware fault set:\n\n");
4669 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4671 for (transp = faults_table; transp -> name != NULL; transp++)
4674 printf_filtered ("\t%-12s ", transp -> name);
4676 printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp -> value)
4679 printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp -> value)
4682 printf_filtered ("\n");
4684 printf_filtered ("\n");
4689 info_proc_mappings (pip, summary)
4690 struct procinfo *pip;
4694 struct prmap *prmaps;
4695 struct prmap *prmap;
4700 printf_filtered ("Mapped address spaces:\n\n");
4701 #ifdef BFD_HOST_64_BIT
4702 printf_filtered (" %18s %18s %10s %10s %7s\n",
4704 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4711 #ifdef PROCFS_USE_READ_WRITE
4712 if (fstat (pip->map_fd, &sbuf) == 0)
4714 nmap = sbuf.st_size / sizeof (prmap_t);
4715 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4716 if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) &&
4717 (read (pip->map_fd, (char *) prmaps,
4718 nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps))))
4721 for (prmap = prmaps; i < nmap; ++prmap, ++i)
4723 if (ioctl (pip -> ctl_fd, PIOCNMAP, &nmap) == 0)
4725 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
4726 if (ioctl (pip -> ctl_fd, PIOCMAP, prmaps) == 0)
4728 for (prmap = prmaps; prmap -> pr_size; ++prmap)
4729 #endif /* PROCFS_USE_READ_WRITE */
4731 #ifdef BFD_HOST_64_BIT
4732 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4734 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4736 (unsigned long)prmap -> pr_vaddr,
4737 (unsigned long)prmap -> pr_vaddr
4738 + prmap -> pr_size - 1,
4741 mappingflags (prmap -> pr_mflags));
4745 printf_filtered ("\n");
4753 info_proc -- implement the "info proc" command
4757 void info_proc (char *args, int from_tty)
4761 Implement gdb's "info proc" command by using the /proc interface
4762 to print status information about any currently running process.
4764 Examples of the use of "info proc" are:
4766 info proc (prints summary info for current inferior)
4767 info proc 123 (prints summary info for process with pid 123)
4768 info proc mappings (prints address mappings)
4769 info proc times (prints process/children times)
4770 info proc id (prints pid, ppid, gid, sid, etc)
4771 FIXME: i proc id not implemented.
4772 info proc status (prints general process state info)
4773 FIXME: i proc status not implemented.
4774 info proc signals (prints info about signal handling)
4775 info proc all (prints all info)
4780 info_proc (args, from_tty)
4785 struct procinfo *pip;
4786 struct cleanup *old_chain;
4802 old_chain = make_cleanup (null_cleanup, 0);
4804 /* Default to using the current inferior if no pid specified. Note
4805 that inferior_pid may be 0, hence we set okerr. */
4807 pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
4808 if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
4809 pip = procinfo_list; /* take first available */
4810 pid = pid & 0xffff; /* extract "real" pid */
4814 if ((argv = buildargv (args)) == NULL)
4818 make_cleanup (freeargv, (char *) argv);
4820 while (*argv != NULL)
4822 argsize = strlen (*argv);
4823 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
4828 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
4833 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
4838 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
4843 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
4848 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
4853 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
4858 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
4863 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
4868 else if ((pid = atoi (*argv)) > 0)
4870 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4871 memset (pip, 0, sizeof (*pip));
4874 if (!open_proc_file (pid, pip, O_RDONLY, 0))
4876 perror_with_name (pip -> pathname);
4880 make_cleanup (close_proc_file, pip);
4882 else if (**argv != '\000')
4884 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
4890 /* If we don't have a valid open process at this point, then we have no
4891 inferior or didn't specify a specific pid. */
4896 No process. Start debugging a program or specify an explicit process ID.");
4899 if (!procfs_read_status (pip))
4901 print_sys_errmsg (pip -> pathname, errno);
4902 error ("procfs_read_status failed");
4905 #ifndef PROCFS_USE_READ_WRITE
4907 nlwp = pip->prstatus.pr_nlwp;
4908 lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
4910 if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
4912 print_sys_errmsg (pip -> pathname, errno);
4913 error ("PIOCLWPIDS failed");
4915 #else /* PIOCLWPIDS */
4917 lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
4919 #endif /* PIOCLWPIDS */
4921 for (; nlwp > 0; nlwp--, lwps++)
4923 pip = find_procinfo ((*lwps << 16) | pid, 1);
4927 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
4928 memset (pip, 0, sizeof (*pip));
4929 if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0))
4932 make_cleanup (close_proc_file, pip);
4934 if (!procfs_read_status (pip))
4936 print_sys_errmsg (pip -> pathname, errno);
4937 error ("procfs_read_status failed");
4941 #endif /* PROCFS_USE_READ_WRITE */
4943 /* Print verbose information of the requested type(s), or just a summary
4944 of the information for all types. */
4946 printf_filtered ("\nInformation for %s.%d:\n\n", pip -> pathname, *lwps);
4947 if (summary || all || flags)
4949 info_proc_flags (pip, summary);
4953 info_proc_stop (pip, summary);
4955 supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
4957 supply_gregset (&pip->prstatus.pr_reg);
4959 printf_filtered ("PC: ");
4960 print_address (read_pc (), gdb_stdout);
4961 printf_filtered ("\n");
4963 if (summary || all || signals || faults)
4965 info_proc_siginfo (pip, summary);
4967 if (summary || all || syscalls)
4969 info_proc_syscalls (pip, summary);
4971 if (summary || all || mappings)
4973 info_proc_mappings (pip, summary);
4975 if (summary || all || signals)
4977 info_proc_signals (pip, summary);
4979 if (summary || all || faults)
4981 info_proc_faults (pip, summary);
4983 printf_filtered ("\n");
4985 /* All done, deal with closing any temporary process info structure,
4986 freeing temporary memory , etc. */
4988 do_cleanups (old_chain);
4989 #ifndef PROCFS_USE_READ_WRITE
4998 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
5002 void modify_inherit_on_fork_flag (fd, flag)
5006 Call this routine to modify the inherit-on-fork flag. This routine is
5007 just a nice wrapper to hide the #ifdefs needed by various systems to
5013 modify_inherit_on_fork_flag (fd, flag)
5017 #if defined (PIOCSET) || defined (PCSET)
5021 struct proc_ctl pctl;
5023 #if defined (PIOCSET) || defined (PCSET) /* New method */
5027 #ifdef PROCFS_USE_READ_WRITE
5029 pctl.data = PR_FORK;
5030 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5033 retval = ioctl (fd, PIOCSET, &pr_flags);
5038 #ifdef PROCFS_USE_READ_WRITE
5040 pctl.data = PR_FORK;
5041 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5044 retval = ioctl (fd, PIOCRESET, &pr_flags);
5049 #ifdef PIOCSFORK /* Original method */
5052 retval = ioctl (fd, PIOCSFORK, NULL);
5056 retval = ioctl (fd, PIOCRFORK, NULL);
5059 Neither PR_FORK nor PIOCSFORK exist!!!
5066 print_sys_errmsg ("modify_inherit_on_fork_flag", errno);
5067 error ("PIOCSFORK or PR_FORK modification failed");
5074 modify_run_on_last_close_flag - Change the run-on-last-close flag
5078 void modify_run_on_last_close_flag (fd, flag)
5082 Call this routine to modify the run-on-last-close flag. This routine
5083 is just a nice wrapper to hide the #ifdefs needed by various systems to
5089 modify_run_on_last_close_flag (fd, flag)
5093 #if defined (PIOCSET) || defined (PCSET)
5097 struct proc_ctl pctl;
5099 #if defined (PIOCSET) || defined (PCSET) /* New method */
5103 #ifdef PROCFS_USE_READ_WRITE
5106 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5109 retval = ioctl (fd, PIOCSET, &pr_flags);
5114 #ifdef PROCFS_USE_READ_WRITE
5117 if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5120 retval = ioctl (fd, PIOCRESET, &pr_flags);
5125 #ifdef PIOCSRLC /* Original method */
5127 retval = ioctl (fd, PIOCSRLC, NULL);
5129 retval = ioctl (fd, PIOCRRLC, NULL);
5131 Neither PR_RLC nor PIOCSRLC exist!!!
5138 print_sys_errmsg ("modify_run_on_last_close_flag", errno);
5139 error ("PIOCSRLC or PR_RLC modification failed");
5146 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5150 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5154 This function function disables traps for the specified system call.
5155 errok is non-zero if errors should be ignored.
5159 procfs_clear_syscall_trap (pi, syscall_num, errok)
5160 struct procinfo *pi;
5168 goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
5170 if (goterr && !errok)
5172 print_sys_errmsg (pi->pathname, errno);
5173 error ("PIOCGENTRY failed");
5178 prdelset (&sysset, syscall_num);
5180 if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok)
5182 print_sys_errmsg (pi->pathname, errno);
5183 error ("PIOCSENTRY failed");
5187 goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0;
5189 if (goterr && !errok)
5191 procfs_clear_syscall_trap (pi, syscall_num, 1);
5192 print_sys_errmsg (pi->pathname, errno);
5193 error ("PIOCGEXIT failed");
5198 praddset (&sysset, syscall_num);
5200 if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok)
5202 procfs_clear_syscall_trap (pi, syscall_num, 1);
5203 print_sys_errmsg (pi->pathname, errno);
5204 error ("PIOCSEXIT failed");
5209 if (!pi->syscall_handlers)
5212 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5216 /* Remove handler func from the handler list */
5218 for (i = 0; i < pi->num_syscall_handlers; i++)
5219 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5221 if (i + 1 != pi->num_syscall_handlers)
5222 { /* Not the last entry.
5223 Move subsequent entries fwd. */
5224 memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1],
5225 (pi->num_syscall_handlers - i - 1)
5226 * sizeof (struct procfs_syscall_handler));
5229 pi->syscall_handlers = xrealloc (pi->syscall_handlers,
5230 (pi->num_syscall_handlers - 1)
5231 * sizeof (struct procfs_syscall_handler));
5232 pi->num_syscall_handlers--;
5237 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5245 procfs_set_syscall_trap -- arrange for a function to be called when the
5246 child executes the specified system call.
5250 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5251 syscall_func_t *function)
5255 This function sets up an entry and/or exit trap for the specified system
5256 call. When the child executes the specified system call, your function
5257 will be called with the call #, a flag that indicates entry or exit, and
5258 pointers to rtnval and statval (which are used by procfs_wait). The
5259 function should return non-zero if something interesting happened, zero
5264 procfs_set_syscall_trap (pi, syscall_num, flags, func)
5265 struct procinfo *pi;
5268 syscall_func_t *func;
5273 if (flags & PROCFS_SYSCALL_ENTRY)
5275 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
5277 print_sys_errmsg (pi->pathname, errno);
5278 error ("PIOCGENTRY failed");
5281 praddset (&sysset, syscall_num);
5283 if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0)
5285 print_sys_errmsg (pi->pathname, errno);
5286 error ("PIOCSENTRY failed");
5290 if (flags & PROCFS_SYSCALL_EXIT)
5292 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0)
5294 procfs_clear_syscall_trap (pi, syscall_num, 1);
5295 print_sys_errmsg (pi->pathname, errno);
5296 error ("PIOCGEXIT failed");
5299 praddset (&sysset, syscall_num);
5301 if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0)
5303 procfs_clear_syscall_trap (pi, syscall_num, 1);
5304 print_sys_errmsg (pi->pathname, errno);
5305 error ("PIOCSEXIT failed");
5310 if (!pi->syscall_handlers)
5312 pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler));
5313 pi->syscall_handlers[0].syscall_num = syscall_num;
5314 pi->syscall_handlers[0].func = func;
5315 pi->num_syscall_handlers = 1;
5321 for (i = 0; i < pi->num_syscall_handlers; i++)
5322 if (pi->syscall_handlers[i].syscall_num == syscall_num)
5324 pi->syscall_handlers[i].func = func;
5328 pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1)
5329 * sizeof (struct procfs_syscall_handler));
5330 pi->syscall_handlers[i].syscall_num = syscall_num;
5331 pi->syscall_handlers[i].func = func;
5332 pi->num_syscall_handlers++;
5336 #ifdef SYS_lwp_create
5342 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5346 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5350 This routine is called both when an inferior process and it's new lwp
5351 are about to finish a _lwp_create() system call. This is the system
5352 call that Solaris uses to create a lightweight process. When the
5353 target process gets this event, we can look at sysarg[2] to find the
5354 new childs lwp ID, and create a procinfo struct from that. After that,
5355 we pretend that we got a SIGTRAP, and return non-zero to tell
5356 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5357 sees the new process and continues it.
5359 When we see the child exiting from lwp_create, we just contine it,
5360 since everything was handled when the parent trapped.
5363 In effect, we are only paying attention to the parent's completion of
5364 the lwp_create syscall. If we only paid attention to the child
5365 instead, then we wouldn't detect the creation of a suspended thread.
5369 procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5370 struct procinfo *pi;
5377 struct procinfo *childpi;
5378 struct proc_ctl pctl;
5380 /* We've just detected the completion of an lwp_create system call. Now we
5381 need to setup a procinfo struct for this thread, and notify the thread
5382 system of the new arrival. */
5384 /* If lwp_create failed, then nothing interesting happened. Continue the
5385 process and go back to sleep. */
5388 /* Joel ... can you check this logic out please? JKJ */
5389 if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1)
5390 { /* _lwp_create failed */
5392 pctl.data = PRCFAULT;
5394 if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
5395 perror_with_name (pi->pathname);
5399 #else /* UNIXWARE */
5400 if (PROCFS_GET_CARRY (pi->prstatus.pr_reg))
5401 { /* _lwp_create failed */
5402 pi->prrun.pr_flags &= PRSTEP;
5403 pi->prrun.pr_flags |= PRCFAULT;
5405 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5406 perror_with_name (pi->pathname);
5412 /* At this point, the new thread is stopped at it's first instruction, and
5413 the parent is stopped at the exit from lwp_create. */
5415 if (pi->new_child) /* Child? */
5416 { /* Yes, just continue it */
5419 pctl.data = PRCFAULT;
5421 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5422 #else /* !UNIXWARE */
5423 pi->prrun.pr_flags &= PRSTEP;
5424 pi->prrun.pr_flags |= PRCFAULT;
5426 if ((pi->prstatus.pr_flags & PR_ISTOP)
5427 && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5428 #endif /* !UNIXWARE */
5429 perror_with_name (pi->pathname);
5431 pi->new_child = 0; /* No longer new */
5436 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5437 in the child and continue the parent. */
5439 /* Third arg is pointer to new thread id. */
5441 lwp_id = read_memory_integer (pi->prstatus.pr_lwp.pr_sysarg[2], sizeof (int));
5443 lwp_id = read_memory_integer (pi->prstatus.pr_sysarg[2], sizeof (int));
5446 lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
5448 childpi = create_procinfo (lwp_id);
5450 /* The new process has actually inherited the lwp_create syscall trap from
5451 it's parent, but we still have to call this to register handlers for
5454 procfs_set_inferior_syscall_traps (childpi);
5455 add_thread (lwp_id);
5456 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
5458 /* Continue the parent */
5461 pctl.data = PRCFAULT;
5463 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5465 pi->prrun.pr_flags &= PRSTEP;
5466 pi->prrun.pr_flags |= PRCFAULT;
5467 if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
5469 perror_with_name (pi->pathname);
5471 /* The new child may have been created in one of two states:
5472 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5473 If suspended, we flag it to be continued later, when it has an event. */
5476 if (childpi->prstatus.pr_lwp.pr_why == PR_SUSPENDED)
5478 if (childpi->prstatus.pr_why == PR_SUSPENDED)
5480 childpi->new_child = 1; /* Flag this as an unseen child process */
5483 /* Continue the child */
5486 pctl.data = PRCFAULT;
5488 if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
5490 childpi->prrun.pr_flags &= PRSTEP;
5491 childpi->prrun.pr_flags |= PRCFAULT;
5493 if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
5495 perror_with_name (childpi->pathname);
5499 #endif /* SYS_lwp_create */
5501 /* Fork an inferior process, and start debugging it with /proc. */
5504 procfs_create_inferior (exec_file, allargs, env)
5509 char *shell_file = getenv ("SHELL");
5511 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
5514 /* We will be looking down the PATH to find shell_file. If we
5515 just do this the normal way (via execlp, which operates by
5516 attempting an exec for each element of the PATH until it
5517 finds one which succeeds), then there will be an exec for
5518 each failed attempt, each of which will cause a PR_SYSEXIT
5519 stop, and we won't know how to distinguish the PR_SYSEXIT's
5520 for these failed execs with the ones for successful execs
5521 (whether the exec has succeeded is stored at that time in the
5522 carry bit or some such architecture-specific and
5523 non-ABI-specified place).
5525 So I can't think of anything better than to search the PATH
5526 now. This has several disadvantages: (1) There is a race
5527 condition; if we find a file now and it is deleted before we
5528 exec it, we lose, even if the deletion leaves a valid file
5529 further down in the PATH, (2) there is no way to know exactly
5530 what an executable (in the sense of "capable of being
5531 exec'd") file is. Using access() loses because it may lose
5532 if the caller is the superuser; failing to use it loses if
5533 there are ACLs or some such. */
5537 /* FIXME-maybe: might want "set path" command so user can change what
5538 path is used from within GDB. */
5539 char *path = getenv ("PATH");
5541 struct stat statbuf;
5544 path = "/bin:/usr/bin";
5546 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
5547 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
5549 p1 = strchr (p, ':');
5554 strncpy (tryname, p, len);
5555 tryname[len] = '\0';
5556 strcat (tryname, "/");
5557 strcat (tryname, shell_file);
5558 if (access (tryname, X_OK) < 0)
5560 if (stat (tryname, &statbuf) < 0)
5562 if (!S_ISREG (statbuf.st_mode))
5563 /* We certainly need to reject directories. I'm not quite
5564 as sure about FIFOs, sockets, etc., but I kind of doubt
5565 that people want to exec() these things. */
5570 /* Not found. This must be an error rather than merely passing
5571 the file to execlp(), because execlp() would try all the
5572 exec()s, causing GDB to get confused. */
5573 error ("Can't find shell %s in PATH", shell_file);
5575 shell_file = tryname;
5578 fork_inferior (exec_file, allargs, env,
5579 proc_set_exec_trap, procfs_init_inferior, NULL, shell_file);
5581 /* We are at the first instruction we care about. */
5582 /* Pedal to the metal... */
5584 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
5587 /* Clean up after the inferior dies. */
5590 procfs_mourn_inferior ()
5592 struct procinfo *pi;
5593 struct procinfo *next_pi;
5595 for (pi = procinfo_list; pi; pi = next_pi)
5598 unconditionally_kill_inferior (pi);
5601 unpush_target (&procfs_ops);
5602 generic_mourn_inferior ();
5606 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5610 /* This variable is controlled by modules that sit atop procfs that may layer
5611 their own process structure atop that provided here. sol-thread.c does
5612 this because of the Solaris two-level thread model. */
5614 return !procfs_suppress_run;
5616 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5619 /* Insert a watchpoint */
5621 procfs_set_watchpoint(pid, addr, len, rw)
5627 struct procinfo *pi;
5630 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5631 wpt.pr_vaddr = (caddr_t)addr;
5633 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
5634 if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0)
5638 /* Currently it sometimes happens that the same watchpoint gets
5639 deleted twice - don't die in this case (FIXME please) */
5640 if (errno == ESRCH && len == 0)
5642 print_sys_errmsg (pi->pathname, errno);
5643 error ("PIOCSWATCH failed");
5649 procfs_stopped_by_watchpoint(pid)
5652 struct procinfo *pi;
5656 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
5657 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
5659 why = pi->prstatus.pr_why;
5660 what = pi->prstatus.pr_what;
5661 if (why == PR_FAULTED
5662 #if defined (FLTWATCH) && defined (FLTKWATCH)
5663 && (what == FLTWATCH || what == FLTKWATCH)
5666 && (what == FLTWATCH)
5669 && (what == FLTKWATCH)
5677 #endif /* !UNIXWARE */
5678 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5680 /* Why is this necessary? Shouldn't dead threads just be removed from the
5684 procfs_thread_alive (pid)
5687 struct procinfo *pi, *next_pi;
5689 for (pi = procinfo_list; pi; pi = next_pi)
5692 if (pi -> pid == pid)
5693 if (procfs_read_status (pi)) /* alive */
5695 else /* defunct (exited) */
5697 close_proc_file (pi);
5705 procfs_first_available ()
5707 struct procinfo *pi;
5709 for (pi = procinfo_list; pi; pi = pi->next)
5711 if (procfs_read_status (pi))
5718 procfs_get_pid_fd (pid)
5721 struct procinfo *pi = find_procinfo (pid, 1);
5729 /* Send a SIGINT to the process group. This acts just like the user typed a
5730 ^C on the controlling terminal.
5732 XXX - This may not be correct for all systems. Some may want to use
5733 killpg() instead of kill (-pgrp). */
5738 extern pid_t inferior_process_group;
5740 kill (-inferior_process_group, SIGINT);
5743 /* Convert a pid to printable form. */
5747 procfs_pid_to_str (pid)
5750 static char buf[100];
5752 sprintf (buf, "Kernel thread %d", TIDGET (pid));
5762 procfs_ops.to_shortname = "procfs";
5763 procfs_ops.to_longname = "Unix /proc child process";
5764 procfs_ops.to_doc = "Unix /proc child process (started by the \"run\" command).";
5765 procfs_ops.to_open = procfs_open;
5766 procfs_ops.to_attach = procfs_attach;
5767 procfs_ops.to_detach = procfs_detach;
5768 procfs_ops.to_resume = procfs_resume;
5769 procfs_ops.to_wait = procfs_wait;
5770 procfs_ops.to_fetch_registers = procfs_fetch_registers;
5771 procfs_ops.to_store_registers = procfs_store_registers;
5772 procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
5773 procfs_ops.to_xfer_memory = procfs_xfer_memory;
5774 procfs_ops.to_files_info = procfs_files_info;
5775 procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
5776 procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
5777 procfs_ops.to_terminal_init = terminal_init_inferior;
5778 procfs_ops.to_terminal_inferior = terminal_inferior;
5779 procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output;
5780 procfs_ops.to_terminal_ours = terminal_ours;
5781 procfs_ops.to_terminal_info = child_terminal_info;
5782 procfs_ops.to_kill = procfs_kill_inferior;
5783 procfs_ops.to_create_inferior = procfs_create_inferior;
5784 procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
5785 procfs_ops.to_can_run = procfs_can_run;
5786 procfs_ops.to_notice_signals = procfs_notice_signals;
5787 procfs_ops.to_thread_alive = procfs_thread_alive;
5788 procfs_ops.to_stop = procfs_stop;
5789 procfs_ops.to_stratum = process_stratum;
5790 procfs_ops.to_has_all_memory = 1;
5791 procfs_ops.to_has_memory = 1;
5792 procfs_ops.to_has_stack = 1;
5793 procfs_ops.to_has_registers = 1;
5794 procfs_ops.to_has_execution = 1;
5795 procfs_ops.to_magic = OPS_MAGIC;
5799 _initialize_procfs ()
5801 #ifdef HAVE_OPTIONAL_PROC_FS
5802 char procname[MAX_PROC_NAME_SIZE];
5805 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5806 don't add procfs support if we cannot access the running
5808 sprintf (procname, STATUS_PROC_NAME_FMT, getpid ());
5809 if ((fd = open (procname, O_RDONLY)) < 0)
5815 add_target (&procfs_ops);
5817 add_info ("processes", info_proc,
5818 "Show process status information using /proc entry.\n\
5819 Specify process id or use current inferior by default.\n\
5820 Specify keywords for detailed information; default is summary.\n\
5821 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5822 `status', `syscalls', and `times'.\n\
5823 Unambiguous abbreviations may be used.");
5825 init_syscall_table ();