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 */
119 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
121 extern struct target_ops procfs_ops
; /* Forward declaration */
123 int procfs_suppress_run
= 0; /* Non-zero if procfs should pretend not to
124 be a runnable target. Used by targets
125 that can sit atop procfs, such as solaris
128 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
129 CORE_ADDR kernel_u_addr
;
132 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
134 #define si_pid _data._proc.pid
136 #define si_uid _data._proc._pdata._kill.uid
137 #endif /* BROKEN_SIGINFO_H */
139 /* Define structures for passing commands to /proc/pid/ctl file. Note that
140 while we create these for the PROCFS_USE_READ_WRITE world, we use them
141 and ignore the extra cmd int in other proc schemes.
143 /* generic ctl msg */
149 /* set general registers */
155 /* set fp registers */
161 /* set signals to be traced */
167 /* set faults to be traced */
173 /* set system calls to be traced */
179 /* set current signal to be traced */
185 /* All access to the inferior, either one started by gdb or one that has
186 been attached to, is controlled by an instance of a procinfo structure,
187 defined below. Since gdb currently only handles one inferior at a time,
188 the procinfo structure for the inferior is statically allocated and
189 only one exists at any given time. There is a separate procinfo
190 structure for use by the "info proc" command, so that we can print
191 useful information about any random process without interfering with
192 the inferior's procinfo information. */
195 struct procinfo
*next
;
196 int pid
; /* Process ID of inferior */
197 int ctl_fd
; /* File descriptor for /proc ctl file */
198 int status_fd
; /* File descriptor for /proc status file */
199 int as_fd
; /* File descriptor for /proc as file */
200 int map_fd
; /* File descriptor for /proc map file */
201 char *pathname
; /* Pathname to /proc entry */
202 int had_event
; /* poll/select says something happened */
203 int was_stopped
; /* Nonzero if was stopped prior to attach */
204 int nopass_next_sigstop
; /* Don't pass a sigstop on next resume */
205 #ifndef HAVE_NO_PRRUN_T
206 prrun_t prrun
; /* Control state when it is run */
208 gdb_prstatus_t prstatus
; /* Current process status info */
209 struct greg_ctl gregset
; /* General register set */
210 struct fpreg_ctl fpregset
; /* Floating point register set */
211 struct flt_ctl fltset
; /* Current traced hardware fault set */
212 struct sig_ctl trace
; /* Current traced signal set */
213 struct sys_ctl exitset
; /* Current traced system call exit set */
214 struct sys_ctl entryset
; /* Current traced system call entry set */
215 struct sig_ctl saved_sighold
; /* Saved held signal set */
216 struct flt_ctl saved_fltset
; /* Saved traced hardware fault set */
217 struct sig_ctl saved_trace
; /* Saved traced signal set */
218 struct sys_ctl saved_exitset
; /* Saved traced system call exit set */
219 struct sys_ctl saved_entryset
;/* Saved traced system call entry set */
220 int num_syscall_handlers
; /* Number of syscall trap handlers
221 currently installed */
222 /* Pointer to list of syscall trap handlers */
223 struct procfs_syscall_handler
*syscall_handlers
;
224 int new_child
; /* Non-zero if it's a new thread */
227 /* List of inferior process information */
228 static struct procinfo
*procinfo_list
= NULL
;
229 static struct pollfd
*poll_list
; /* pollfds used for waiting on /proc */
231 static int num_poll_list
= 0; /* Number of entries in poll_list */
233 /* Much of the information used in the /proc interface, particularly for
234 printing status information, is kept as tables of structures of the
235 following form. These tables can be used to map numeric values to
236 their symbolic names and to a string that describes their specific use. */
239 int value
; /* The numeric value */
240 char *name
; /* The equivalent symbolic value */
241 char *desc
; /* Short description of value */
244 /* Translate bits in the pr_flags member of the prstatus structure, into the
245 names and desc information. */
247 static struct trans pr_flag_table
[] =
249 #if defined (PR_STOPPED)
250 { PR_STOPPED
, "PR_STOPPED", "Process is stopped" },
252 #if defined (PR_ISTOP)
253 { PR_ISTOP
, "PR_ISTOP", "Stopped on an event of interest" },
255 #if defined (PR_DSTOP)
256 { PR_DSTOP
, "PR_DSTOP", "A stop directive is in effect" },
258 #if defined (PR_ASLEEP)
259 { PR_ASLEEP
, "PR_ASLEEP", "Sleeping in an interruptible system call" },
261 #if defined (PR_FORK)
262 { PR_FORK
, "PR_FORK", "Inherit-on-fork is in effect" },
265 { PR_RLC
, "PR_RLC", "Run-on-last-close is in effect" },
267 #if defined (PR_PTRACE)
268 { PR_PTRACE
, "PR_PTRACE", "Process is being controlled by ptrace" },
270 #if defined (PR_PCINVAL)
271 { PR_PCINVAL
, "PR_PCINVAL", "PC refers to an invalid virtual address" },
273 #if defined (PR_ISSYS)
274 { PR_ISSYS
, "PR_ISSYS", "Is a system process" },
276 #if defined (PR_STEP)
277 { PR_STEP
, "PR_STEP", "Process has single step pending" },
280 { PR_KLC
, "PR_KLC", "Kill-on-last-close is in effect" },
282 #if defined (PR_ASYNC)
283 { PR_ASYNC
, "PR_ASYNC", "Asynchronous stop is in effect" },
285 #if defined (PR_PCOMPAT)
286 { PR_PCOMPAT
, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
288 #if defined (PR_MSACCT)
289 { PR_MSACCT
, "PR_MSACCT", "Microstate accounting enabled" },
291 #if defined (PR_BPTADJ)
292 { PR_BPTADJ
, "PR_BPTADJ", "Breakpoint PC adjustment in effect" },
294 #if defined (PR_ASLWP)
295 { PR_ASLWP
, "PR_ASLWP", "Asynchronus signal LWP" },
300 /* Translate values in the pr_why field of the prstatus struct. */
302 static struct trans pr_why_table
[] =
304 #if defined (PR_REQUESTED)
305 { PR_REQUESTED
, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
307 #if defined (PR_SIGNALLED)
308 { PR_SIGNALLED
, "PR_SIGNALLED", "Receipt of a traced signal" },
310 #if defined (PR_SYSENTRY)
311 { PR_SYSENTRY
, "PR_SYSENTRY", "Entry to a traced system call" },
313 #if defined (PR_SYSEXIT)
314 { PR_SYSEXIT
, "PR_SYSEXIT", "Exit from a traced system call" },
316 #if defined (PR_JOBCONTROL)
317 { PR_JOBCONTROL
, "PR_JOBCONTROL", "Default job control stop signal action" },
319 #if defined (PR_FAULTED)
320 { PR_FAULTED
, "PR_FAULTED", "Incurred a traced hardware fault" },
322 #if defined (PR_SUSPENDED)
323 { PR_SUSPENDED
, "PR_SUSPENDED", "Process suspended" },
325 #if defined (PR_CHECKPOINT)
326 { PR_CHECKPOINT
, "PR_CHECKPOINT", "(???)" },
331 /* Hardware fault translation table. */
333 static struct trans faults_table
[] =
336 { FLTILL
, "FLTILL", "Illegal instruction" },
338 #if defined (FLTPRIV)
339 { FLTPRIV
, "FLTPRIV", "Privileged instruction" },
342 { FLTBPT
, "FLTBPT", "Breakpoint trap" },
344 #if defined (FLTTRACE)
345 { FLTTRACE
, "FLTTRACE", "Trace trap" },
347 #if defined (FLTACCESS)
348 { FLTACCESS
, "FLTACCESS", "Memory access fault" },
350 #if defined (FLTBOUNDS)
351 { FLTBOUNDS
, "FLTBOUNDS", "Memory bounds violation" },
353 #if defined (FLTIOVF)
354 { FLTIOVF
, "FLTIOVF", "Integer overflow" },
356 #if defined (FLTIZDIV)
357 { FLTIZDIV
, "FLTIZDIV", "Integer zero divide" },
360 { FLTFPE
, "FLTFPE", "Floating-point exception" },
362 #if defined (FLTSTACK)
363 { FLTSTACK
, "FLTSTACK", "Unrecoverable stack fault" },
365 #if defined (FLTPAGE)
366 { FLTPAGE
, "FLTPAGE", "Recoverable page fault" },
371 /* Translation table for signal generation information. See UNIX System
372 V Release 4 Programmer's Reference Manual, siginfo(5). */
374 static struct sigcode
{
379 } siginfo_table
[] = {
380 #if defined (SIGILL) && defined (ILL_ILLOPC)
381 { SIGILL
, ILL_ILLOPC
, "ILL_ILLOPC", "Illegal opcode" },
383 #if defined (SIGILL) && defined (ILL_ILLOPN)
384 { SIGILL
, ILL_ILLOPN
, "ILL_ILLOPN", "Illegal operand", },
386 #if defined (SIGILL) && defined (ILL_ILLADR)
387 { SIGILL
, ILL_ILLADR
, "ILL_ILLADR", "Illegal addressing mode" },
389 #if defined (SIGILL) && defined (ILL_ILLTRP)
390 { SIGILL
, ILL_ILLTRP
, "ILL_ILLTRP", "Illegal trap" },
392 #if defined (SIGILL) && defined (ILL_PRVOPC)
393 { SIGILL
, ILL_PRVOPC
, "ILL_PRVOPC", "Privileged opcode" },
395 #if defined (SIGILL) && defined (ILL_PRVREG)
396 { SIGILL
, ILL_PRVREG
, "ILL_PRVREG", "Privileged register" },
398 #if defined (SIGILL) && defined (ILL_COPROC)
399 { SIGILL
, ILL_COPROC
, "ILL_COPROC", "Coprocessor error" },
401 #if defined (SIGILL) && defined (ILL_BADSTK)
402 { SIGILL
, ILL_BADSTK
, "ILL_BADSTK", "Internal stack error" },
404 #if defined (SIGFPE) && defined (FPE_INTDIV)
405 { SIGFPE
, FPE_INTDIV
, "FPE_INTDIV", "Integer divide by zero" },
407 #if defined (SIGFPE) && defined (FPE_INTOVF)
408 { SIGFPE
, FPE_INTOVF
, "FPE_INTOVF", "Integer overflow" },
410 #if defined (SIGFPE) && defined (FPE_FLTDIV)
411 { SIGFPE
, FPE_FLTDIV
, "FPE_FLTDIV", "Floating point divide by zero" },
413 #if defined (SIGFPE) && defined (FPE_FLTOVF)
414 { SIGFPE
, FPE_FLTOVF
, "FPE_FLTOVF", "Floating point overflow" },
416 #if defined (SIGFPE) && defined (FPE_FLTUND)
417 { SIGFPE
, FPE_FLTUND
, "FPE_FLTUND", "Floating point underflow" },
419 #if defined (SIGFPE) && defined (FPE_FLTRES)
420 { SIGFPE
, FPE_FLTRES
, "FPE_FLTRES", "Floating point inexact result" },
422 #if defined (SIGFPE) && defined (FPE_FLTINV)
423 { SIGFPE
, FPE_FLTINV
, "FPE_FLTINV", "Invalid floating point operation" },
425 #if defined (SIGFPE) && defined (FPE_FLTSUB)
426 { SIGFPE
, FPE_FLTSUB
, "FPE_FLTSUB", "Subscript out of range" },
428 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
429 { SIGSEGV
, SEGV_MAPERR
, "SEGV_MAPERR", "Address not mapped to object" },
431 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
432 { SIGSEGV
, SEGV_ACCERR
, "SEGV_ACCERR", "Invalid permissions for object" },
434 #if defined (SIGBUS) && defined (BUS_ADRALN)
435 { SIGBUS
, BUS_ADRALN
, "BUS_ADRALN", "Invalid address alignment" },
437 #if defined (SIGBUS) && defined (BUS_ADRERR)
438 { SIGBUS
, BUS_ADRERR
, "BUS_ADRERR", "Non-existent physical address" },
440 #if defined (SIGBUS) && defined (BUS_OBJERR)
441 { SIGBUS
, BUS_OBJERR
, "BUS_OBJERR", "Object specific hardware error" },
443 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
444 { SIGTRAP
, TRAP_BRKPT
, "TRAP_BRKPT", "Process breakpoint" },
446 #if defined (SIGTRAP) && defined (TRAP_TRACE)
447 { SIGTRAP
, TRAP_TRACE
, "TRAP_TRACE", "Process trace trap" },
449 #if defined (SIGCLD) && defined (CLD_EXITED)
450 { SIGCLD
, CLD_EXITED
, "CLD_EXITED", "Child has exited" },
452 #if defined (SIGCLD) && defined (CLD_KILLED)
453 { SIGCLD
, CLD_KILLED
, "CLD_KILLED", "Child was killed" },
455 #if defined (SIGCLD) && defined (CLD_DUMPED)
456 { SIGCLD
, CLD_DUMPED
, "CLD_DUMPED", "Child has terminated abnormally" },
458 #if defined (SIGCLD) && defined (CLD_TRAPPED)
459 { SIGCLD
, CLD_TRAPPED
, "CLD_TRAPPED", "Traced child has trapped" },
461 #if defined (SIGCLD) && defined (CLD_STOPPED)
462 { SIGCLD
, CLD_STOPPED
, "CLD_STOPPED", "Child has stopped" },
464 #if defined (SIGCLD) && defined (CLD_CONTINUED)
465 { SIGCLD
, CLD_CONTINUED
, "CLD_CONTINUED", "Stopped child had continued" },
467 #if defined (SIGPOLL) && defined (POLL_IN)
468 { SIGPOLL
, POLL_IN
, "POLL_IN", "Input input available" },
470 #if defined (SIGPOLL) && defined (POLL_OUT)
471 { SIGPOLL
, POLL_OUT
, "POLL_OUT", "Output buffers available" },
473 #if defined (SIGPOLL) && defined (POLL_MSG)
474 { SIGPOLL
, POLL_MSG
, "POLL_MSG", "Input message available" },
476 #if defined (SIGPOLL) && defined (POLL_ERR)
477 { SIGPOLL
, POLL_ERR
, "POLL_ERR", "I/O error" },
479 #if defined (SIGPOLL) && defined (POLL_PRI)
480 { SIGPOLL
, POLL_PRI
, "POLL_PRI", "High priority input available" },
482 #if defined (SIGPOLL) && defined (POLL_HUP)
483 { SIGPOLL
, POLL_HUP
, "POLL_HUP", "Device disconnected" },
488 static char *syscall_table
[MAX_SYSCALLS
];
490 /* Prototypes for local functions */
492 static void procfs_stop
PARAMS ((void));
494 static int procfs_thread_alive
PARAMS ((int));
496 static int procfs_can_run
PARAMS ((void));
498 static void procfs_mourn_inferior
PARAMS ((void));
500 static void procfs_fetch_registers
PARAMS ((int));
502 static int procfs_wait
PARAMS ((int, struct target_waitstatus
*));
504 static void procfs_open
PARAMS ((char *, int));
506 static void procfs_files_info
PARAMS ((struct target_ops
*));
508 static void procfs_prepare_to_store
PARAMS ((void));
510 static void procfs_detach
PARAMS ((char *, int));
512 static void procfs_attach
PARAMS ((char *, int));
514 static void proc_set_exec_trap
PARAMS ((void));
516 static int procfs_init_inferior
PARAMS ((int));
518 static struct procinfo
*create_procinfo
PARAMS ((int));
520 static void procfs_store_registers
PARAMS ((int));
522 static int procfs_xfer_memory
PARAMS ((CORE_ADDR
, char *, int, int, struct target_ops
*));
524 static void procfs_kill_inferior
PARAMS ((void));
526 static char *sigcodedesc
PARAMS ((siginfo_t
*));
528 static char *sigcodename
PARAMS ((siginfo_t
*));
530 static struct procinfo
*wait_fd
PARAMS ((void));
532 static void remove_fd
PARAMS ((struct procinfo
*));
534 static void add_fd
PARAMS ((struct procinfo
*));
536 static void set_proc_siginfo
PARAMS ((struct procinfo
*, int));
538 static void init_syscall_table
PARAMS ((void));
540 static char *syscallname
PARAMS ((int));
542 static char *signalname
PARAMS ((int));
544 static char *errnoname
PARAMS ((int));
546 static int proc_address_to_fd
PARAMS ((struct procinfo
*, CORE_ADDR
, int));
548 static int open_proc_file
PARAMS ((int, struct procinfo
*, int, int));
550 static void close_proc_file
PARAMS ((struct procinfo
*));
552 static void unconditionally_kill_inferior
PARAMS ((struct procinfo
*));
554 static NORETURN
void proc_init_failed
PARAMS ((struct procinfo
*, char *, int)) ATTR_NORETURN
;
556 static void info_proc
PARAMS ((char *, int));
558 static void info_proc_flags
PARAMS ((struct procinfo
*, int));
560 static void info_proc_stop
PARAMS ((struct procinfo
*, int));
562 static void info_proc_siginfo
PARAMS ((struct procinfo
*, int));
564 static void info_proc_syscalls
PARAMS ((struct procinfo
*, int));
566 static void info_proc_mappings
PARAMS ((struct procinfo
*, int));
568 static void info_proc_signals
PARAMS ((struct procinfo
*, int));
570 static void info_proc_faults
PARAMS ((struct procinfo
*, int));
572 static char *mappingflags
PARAMS ((long));
574 static char *lookupname
PARAMS ((struct trans
*, unsigned int, char *));
576 static char *lookupdesc
PARAMS ((struct trans
*, unsigned int));
578 static int do_attach
PARAMS ((int pid
));
580 static void do_detach
PARAMS ((int siggnal
));
582 static void procfs_create_inferior
PARAMS ((char *, char *, char **));
584 static void procfs_notice_signals
PARAMS ((int pid
));
586 static void notice_signals
PARAMS ((struct procinfo
*, struct sig_ctl
*));
588 static struct procinfo
*find_procinfo
PARAMS ((pid_t pid
, int okfail
));
590 static int procfs_write_pcwstop
PARAMS ((struct procinfo
*));
591 static int procfs_read_status
PARAMS ((struct procinfo
*));
592 static void procfs_write_pckill
PARAMS ((struct procinfo
*));
594 typedef int syscall_func_t
PARAMS ((struct procinfo
*pi
, int syscall_num
,
595 int why
, int *rtnval
, int *statval
));
597 static void procfs_set_syscall_trap
PARAMS ((struct procinfo
*pi
,
598 int syscall_num
, int flags
,
599 syscall_func_t
*func
));
601 static void procfs_clear_syscall_trap
PARAMS ((struct procinfo
*pi
,
602 int syscall_num
, int errok
));
604 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
605 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
607 static syscall_func_t procfs_exit_handler
;
609 static syscall_func_t procfs_exec_handler
;
612 static syscall_func_t procfs_sproc_handler
;
613 static syscall_func_t procfs_fork_handler
;
616 #ifdef SYS_lwp_create
617 static syscall_func_t procfs_lwp_creation_handler
;
620 static void modify_inherit_on_fork_flag
PARAMS ((int fd
, int flag
));
621 static void modify_run_on_last_close_flag
PARAMS ((int fd
, int flag
));
625 struct procfs_syscall_handler
627 int syscall_num
; /* The number of the system call being handled */
628 /* The function to be called */
629 syscall_func_t
*func
;
632 static void procfs_resume
PARAMS ((int pid
, int step
,
633 enum target_signal signo
));
635 /* External function prototypes that can't be easily included in any
636 header file because the args are typedefs in system include files. */
638 extern void supply_gregset
PARAMS ((gregset_t
*));
640 extern void fill_gregset
PARAMS ((gregset_t
*, int));
643 extern void supply_fpregset
PARAMS ((fpregset_t
*));
645 extern void fill_fpregset
PARAMS ((fpregset_t
*, int));
652 find_procinfo -- convert a process id to a struct procinfo
656 static struct procinfo * find_procinfo (pid_t pid, int okfail);
660 Given a process id, look it up in the procinfo chain. Returns
661 a struct procinfo *. If can't find pid, then call error(),
662 unless okfail is set, in which case, return NULL;
665 static struct procinfo
*
666 find_procinfo (pid
, okfail
)
670 struct procinfo
*procinfo
;
672 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
673 if (procinfo
->pid
== pid
)
679 error ("procfs (find_procinfo): Couldn't locate pid %d", pid
);
686 current_procinfo -- convert inferior_pid to a struct procinfo
690 static struct procinfo * current_procinfo;
694 Looks up inferior_pid in the procinfo chain. Always returns a
695 struct procinfo *. If process can't be found, we error() out.
698 #define current_procinfo find_procinfo (inferior_pid, 0)
704 add_fd -- Add the fd to the poll/select list
708 static void add_fd (struct procinfo *);
712 Add the fd of the supplied procinfo to the list of fds used for
713 poll/select operations.
720 if (num_poll_list
<= 0)
721 poll_list
= (struct pollfd
*) xmalloc (sizeof (struct pollfd
));
723 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
725 * sizeof (struct pollfd
));
726 poll_list
[num_poll_list
].fd
= pi
->ctl_fd
;
728 poll_list
[num_poll_list
].events
= POLLWRNORM
;
730 poll_list
[num_poll_list
].events
= POLLPRI
;
740 remove_fd -- Remove the fd from the poll/select list
744 static void remove_fd (struct procinfo *);
748 Remove the fd of the supplied procinfo from the list of fds used
749 for poll/select operations.
758 for (i
= 0; i
< num_poll_list
; i
++)
760 if (poll_list
[i
].fd
== pi
->ctl_fd
)
762 if (i
!= num_poll_list
- 1)
763 memcpy (poll_list
+ i
, poll_list
+ i
+ 1,
764 (num_poll_list
- i
- 1) * sizeof (struct pollfd
));
768 if (num_poll_list
== 0)
771 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
773 * sizeof (struct pollfd
));
783 procfs_read_status - get procfs fd status
787 static int procfs_read_status (pi) struct procinfo *pi;
791 Given a pointer to a procinfo struct, get the status of
792 the status_fd in the appropriate way. Returns 0 on failure,
797 procfs_read_status (pi
)
800 #ifdef PROCFS_USE_READ_WRITE
801 if ((lseek (pi
->status_fd
, 0, SEEK_SET
) < 0) ||
802 (read (pi
->status_fd
, (char *) &pi
->prstatus
,
803 sizeof (gdb_prstatus_t
)) != sizeof (gdb_prstatus_t
)))
805 if (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
816 procfs_write_pcwstop - send a PCWSTOP to procfs fd
820 static int procfs_write_pcwstop (pi) struct procinfo *pi;
824 Given a pointer to a procinfo struct, send a PCWSTOP to
825 the ctl_fd in the appropriate way. Returns 0 on failure,
830 procfs_write_pcwstop (pi
)
833 #ifdef PROCFS_USE_READ_WRITE
835 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
837 if (ioctl (pi
->ctl_fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
848 procfs_write_pckill - send a kill to procfs fd
852 static void procfs_write_pckill (pi) struct procinfo *pi;
856 Given a pointer to a procinfo struct, send a kill to
857 the ctl_fd in the appropriate way. Returns 0 on failure,
862 procfs_write_pckill (pi
)
865 #ifdef PROCFS_USE_READ_WRITE
866 struct proc_ctl pctl
;
869 write (pi
->ctl_fd
, &pctl
, sizeof (struct proc_ctl
));
872 ioctl (pi
->ctl_fd
, PIOCKILL
, &signo
);
876 static struct procinfo
*
879 struct procinfo
*pi
, *next_pi
;
885 set_sigint_trap (); /* Causes SIGINT to be passed on to the
893 num_fds
= poll (poll_list
, num_poll_list
, -1);
896 if (num_fds
< 0 && errno
== EINTR
)
898 print_sys_errmsg ("poll failed", errno
);
899 error ("Poll failed, returned %d", num_fds
);
901 #else /* LOSING_POLL */
902 pi
= current_procinfo
;
904 while (!procfs_write_pcwstop (pi
))
908 /* Process exited. */
909 pi
->prstatus
.pr_flags
= 0;
912 else if (errno
!= EINTR
)
914 print_sys_errmsg (pi
->pathname
, errno
);
915 error ("procfs_write_pcwstop failed");
919 #endif /* LOSING_POLL */
921 clear_sigint_trap ();
926 for (i
= 0; i
< num_poll_list
&& num_fds
> 0; i
++)
928 if (0 == (poll_list
[i
].revents
&
929 (POLLWRNORM
| POLLPRI
| POLLERR
| POLLHUP
| POLLNVAL
)))
931 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
934 if (poll_list
[i
].fd
== pi
->ctl_fd
)
937 if ((poll_list
[i
].revents
& POLLHUP
) != 0 ||
938 !procfs_read_status(pi
))
939 { /* The LWP has apparently terminated. */
940 if (num_poll_list
<= 1)
942 pi
->prstatus
.pr_flags
= 0;
947 printf_filtered ("LWP %d exited.\n",
948 (pi
->pid
>> 16) & 0xffff);
949 close_proc_file (pi
);
951 continue; /* already another event to process */
953 goto wait_again
; /* wait for another event */
960 error ("wait_fd: Couldn't find procinfo for fd %d\n",
963 #endif /* LOSING_POLL */
972 lookupdesc -- translate a value to a summary desc string
976 static char *lookupdesc (struct trans *transp, unsigned int val);
980 Given a pointer to a translation table and a value to be translated,
981 lookup the desc string and return it.
985 lookupdesc (transp
, val
)
986 struct trans
*transp
;
991 for (desc
= NULL
; transp
-> name
!= NULL
; transp
++)
993 if (transp
-> value
== val
)
995 desc
= transp
-> desc
;
1000 /* Didn't find a translation for the specified value, set a default one. */
1013 lookupname -- translate a value to symbolic name
1017 static char *lookupname (struct trans *transp, unsigned int val,
1022 Given a pointer to a translation table, a value to be translated,
1023 and a default prefix to return if the value can't be translated,
1024 match the value with one of the translation table entries and
1025 return a pointer to the symbolic name.
1027 If no match is found it just returns the value as a printable string,
1028 with the given prefix. The previous such value, if any, is freed
1033 lookupname (transp
, val
, prefix
)
1034 struct trans
*transp
;
1038 static char *locbuf
;
1041 for (name
= NULL
; transp
-> name
!= NULL
; transp
++)
1043 if (transp
-> value
== val
)
1045 name
= transp
-> name
;
1050 /* Didn't find a translation for the specified value, build a default
1051 one using the specified prefix and return it. The lifetime of
1052 the value is only until the next one is needed. */
1060 locbuf
= xmalloc (strlen (prefix
) + 16);
1061 sprintf (locbuf
, "%s %u", prefix
, val
);
1071 struct sigcode
*scp
;
1073 static char locbuf
[32];
1075 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1077 if ((scp
-> signo
== sip
-> si_signo
) &&
1078 (scp
-> code
== sip
-> si_code
))
1080 name
= scp
-> codename
;
1086 sprintf (locbuf
, "sigcode %u", sip
-> si_signo
);
1096 struct sigcode
*scp
;
1099 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1101 if ((scp
-> signo
== sip
-> si_signo
) &&
1102 (scp
-> code
== sip
-> si_code
))
1110 desc
= "Unrecognized signal or trap use";
1119 syscallname - translate a system call number into a system call name
1123 char *syscallname (int syscallnum)
1127 Given a system call number, translate it into the printable name
1128 of a system call, or into "syscall <num>" if it is an unknown
1133 syscallname (syscallnum
)
1136 static char locbuf
[32];
1138 if (syscallnum
>= 0 && syscallnum
< MAX_SYSCALLS
1139 && syscall_table
[syscallnum
] != NULL
)
1140 return syscall_table
[syscallnum
];
1143 sprintf (locbuf
, "syscall %u", syscallnum
);
1152 init_syscall_table - initialize syscall translation table
1156 void init_syscall_table (void)
1160 Dynamically initialize the translation table to convert system
1161 call numbers into printable system call names. Done once per
1162 gdb run, on initialization.
1166 This is awfully ugly, but preprocessor tricks to make it prettier
1167 tend to be nonportable.
1171 init_syscall_table ()
1173 #if defined (SYS_exit)
1174 syscall_table
[SYS_exit
] = "exit";
1176 #if defined (SYS_fork)
1177 syscall_table
[SYS_fork
] = "fork";
1179 #if defined (SYS_read)
1180 syscall_table
[SYS_read
] = "read";
1182 #if defined (SYS_write)
1183 syscall_table
[SYS_write
] = "write";
1185 #if defined (SYS_open)
1186 syscall_table
[SYS_open
] = "open";
1188 #if defined (SYS_close)
1189 syscall_table
[SYS_close
] = "close";
1191 #if defined (SYS_wait)
1192 syscall_table
[SYS_wait
] = "wait";
1194 #if defined (SYS_creat)
1195 syscall_table
[SYS_creat
] = "creat";
1197 #if defined (SYS_link)
1198 syscall_table
[SYS_link
] = "link";
1200 #if defined (SYS_unlink)
1201 syscall_table
[SYS_unlink
] = "unlink";
1203 #if defined (SYS_exec)
1204 syscall_table
[SYS_exec
] = "exec";
1206 #if defined (SYS_execv)
1207 syscall_table
[SYS_execv
] = "execv";
1209 #if defined (SYS_execve)
1210 syscall_table
[SYS_execve
] = "execve";
1212 #if defined (SYS_chdir)
1213 syscall_table
[SYS_chdir
] = "chdir";
1215 #if defined (SYS_time)
1216 syscall_table
[SYS_time
] = "time";
1218 #if defined (SYS_mknod)
1219 syscall_table
[SYS_mknod
] = "mknod";
1221 #if defined (SYS_chmod)
1222 syscall_table
[SYS_chmod
] = "chmod";
1224 #if defined (SYS_chown)
1225 syscall_table
[SYS_chown
] = "chown";
1227 #if defined (SYS_brk)
1228 syscall_table
[SYS_brk
] = "brk";
1230 #if defined (SYS_stat)
1231 syscall_table
[SYS_stat
] = "stat";
1233 #if defined (SYS_lseek)
1234 syscall_table
[SYS_lseek
] = "lseek";
1236 #if defined (SYS_getpid)
1237 syscall_table
[SYS_getpid
] = "getpid";
1239 #if defined (SYS_mount)
1240 syscall_table
[SYS_mount
] = "mount";
1242 #if defined (SYS_umount)
1243 syscall_table
[SYS_umount
] = "umount";
1245 #if defined (SYS_setuid)
1246 syscall_table
[SYS_setuid
] = "setuid";
1248 #if defined (SYS_getuid)
1249 syscall_table
[SYS_getuid
] = "getuid";
1251 #if defined (SYS_stime)
1252 syscall_table
[SYS_stime
] = "stime";
1254 #if defined (SYS_ptrace)
1255 syscall_table
[SYS_ptrace
] = "ptrace";
1257 #if defined (SYS_alarm)
1258 syscall_table
[SYS_alarm
] = "alarm";
1260 #if defined (SYS_fstat)
1261 syscall_table
[SYS_fstat
] = "fstat";
1263 #if defined (SYS_pause)
1264 syscall_table
[SYS_pause
] = "pause";
1266 #if defined (SYS_utime)
1267 syscall_table
[SYS_utime
] = "utime";
1269 #if defined (SYS_stty)
1270 syscall_table
[SYS_stty
] = "stty";
1272 #if defined (SYS_gtty)
1273 syscall_table
[SYS_gtty
] = "gtty";
1275 #if defined (SYS_access)
1276 syscall_table
[SYS_access
] = "access";
1278 #if defined (SYS_nice)
1279 syscall_table
[SYS_nice
] = "nice";
1281 #if defined (SYS_statfs)
1282 syscall_table
[SYS_statfs
] = "statfs";
1284 #if defined (SYS_sync)
1285 syscall_table
[SYS_sync
] = "sync";
1287 #if defined (SYS_kill)
1288 syscall_table
[SYS_kill
] = "kill";
1290 #if defined (SYS_fstatfs)
1291 syscall_table
[SYS_fstatfs
] = "fstatfs";
1293 #if defined (SYS_pgrpsys)
1294 syscall_table
[SYS_pgrpsys
] = "pgrpsys";
1296 #if defined (SYS_xenix)
1297 syscall_table
[SYS_xenix
] = "xenix";
1299 #if defined (SYS_dup)
1300 syscall_table
[SYS_dup
] = "dup";
1302 #if defined (SYS_pipe)
1303 syscall_table
[SYS_pipe
] = "pipe";
1305 #if defined (SYS_times)
1306 syscall_table
[SYS_times
] = "times";
1308 #if defined (SYS_profil)
1309 syscall_table
[SYS_profil
] = "profil";
1311 #if defined (SYS_plock)
1312 syscall_table
[SYS_plock
] = "plock";
1314 #if defined (SYS_setgid)
1315 syscall_table
[SYS_setgid
] = "setgid";
1317 #if defined (SYS_getgid)
1318 syscall_table
[SYS_getgid
] = "getgid";
1320 #if defined (SYS_signal)
1321 syscall_table
[SYS_signal
] = "signal";
1323 #if defined (SYS_msgsys)
1324 syscall_table
[SYS_msgsys
] = "msgsys";
1326 #if defined (SYS_sys3b)
1327 syscall_table
[SYS_sys3b
] = "sys3b";
1329 #if defined (SYS_sysi86)
1330 syscall_table
[SYS_sysi86
] = "sysi86";
1332 #if defined (SYS_acct)
1333 syscall_table
[SYS_acct
] = "acct";
1335 #if defined (SYS_shmsys)
1336 syscall_table
[SYS_shmsys
] = "shmsys";
1338 #if defined (SYS_semsys)
1339 syscall_table
[SYS_semsys
] = "semsys";
1341 #if defined (SYS_ioctl)
1342 syscall_table
[SYS_ioctl
] = "ioctl";
1344 #if defined (SYS_uadmin)
1345 syscall_table
[SYS_uadmin
] = "uadmin";
1347 #if defined (SYS_utssys)
1348 syscall_table
[SYS_utssys
] = "utssys";
1350 #if defined (SYS_fsync)
1351 syscall_table
[SYS_fsync
] = "fsync";
1353 #if defined (SYS_umask)
1354 syscall_table
[SYS_umask
] = "umask";
1356 #if defined (SYS_chroot)
1357 syscall_table
[SYS_chroot
] = "chroot";
1359 #if defined (SYS_fcntl)
1360 syscall_table
[SYS_fcntl
] = "fcntl";
1362 #if defined (SYS_ulimit)
1363 syscall_table
[SYS_ulimit
] = "ulimit";
1365 #if defined (SYS_rfsys)
1366 syscall_table
[SYS_rfsys
] = "rfsys";
1368 #if defined (SYS_rmdir)
1369 syscall_table
[SYS_rmdir
] = "rmdir";
1371 #if defined (SYS_mkdir)
1372 syscall_table
[SYS_mkdir
] = "mkdir";
1374 #if defined (SYS_getdents)
1375 syscall_table
[SYS_getdents
] = "getdents";
1377 #if defined (SYS_sysfs)
1378 syscall_table
[SYS_sysfs
] = "sysfs";
1380 #if defined (SYS_getmsg)
1381 syscall_table
[SYS_getmsg
] = "getmsg";
1383 #if defined (SYS_putmsg)
1384 syscall_table
[SYS_putmsg
] = "putmsg";
1386 #if defined (SYS_poll)
1387 syscall_table
[SYS_poll
] = "poll";
1389 #if defined (SYS_lstat)
1390 syscall_table
[SYS_lstat
] = "lstat";
1392 #if defined (SYS_symlink)
1393 syscall_table
[SYS_symlink
] = "symlink";
1395 #if defined (SYS_readlink)
1396 syscall_table
[SYS_readlink
] = "readlink";
1398 #if defined (SYS_setgroups)
1399 syscall_table
[SYS_setgroups
] = "setgroups";
1401 #if defined (SYS_getgroups)
1402 syscall_table
[SYS_getgroups
] = "getgroups";
1404 #if defined (SYS_fchmod)
1405 syscall_table
[SYS_fchmod
] = "fchmod";
1407 #if defined (SYS_fchown)
1408 syscall_table
[SYS_fchown
] = "fchown";
1410 #if defined (SYS_sigprocmask)
1411 syscall_table
[SYS_sigprocmask
] = "sigprocmask";
1413 #if defined (SYS_sigsuspend)
1414 syscall_table
[SYS_sigsuspend
] = "sigsuspend";
1416 #if defined (SYS_sigaltstack)
1417 syscall_table
[SYS_sigaltstack
] = "sigaltstack";
1419 #if defined (SYS_sigaction)
1420 syscall_table
[SYS_sigaction
] = "sigaction";
1422 #if defined (SYS_sigpending)
1423 syscall_table
[SYS_sigpending
] = "sigpending";
1425 #if defined (SYS_context)
1426 syscall_table
[SYS_context
] = "context";
1428 #if defined (SYS_evsys)
1429 syscall_table
[SYS_evsys
] = "evsys";
1431 #if defined (SYS_evtrapret)
1432 syscall_table
[SYS_evtrapret
] = "evtrapret";
1434 #if defined (SYS_statvfs)
1435 syscall_table
[SYS_statvfs
] = "statvfs";
1437 #if defined (SYS_fstatvfs)
1438 syscall_table
[SYS_fstatvfs
] = "fstatvfs";
1440 #if defined (SYS_nfssys)
1441 syscall_table
[SYS_nfssys
] = "nfssys";
1443 #if defined (SYS_waitsys)
1444 syscall_table
[SYS_waitsys
] = "waitsys";
1446 #if defined (SYS_sigsendsys)
1447 syscall_table
[SYS_sigsendsys
] = "sigsendsys";
1449 #if defined (SYS_hrtsys)
1450 syscall_table
[SYS_hrtsys
] = "hrtsys";
1452 #if defined (SYS_acancel)
1453 syscall_table
[SYS_acancel
] = "acancel";
1455 #if defined (SYS_async)
1456 syscall_table
[SYS_async
] = "async";
1458 #if defined (SYS_priocntlsys)
1459 syscall_table
[SYS_priocntlsys
] = "priocntlsys";
1461 #if defined (SYS_pathconf)
1462 syscall_table
[SYS_pathconf
] = "pathconf";
1464 #if defined (SYS_mincore)
1465 syscall_table
[SYS_mincore
] = "mincore";
1467 #if defined (SYS_mmap)
1468 syscall_table
[SYS_mmap
] = "mmap";
1470 #if defined (SYS_mprotect)
1471 syscall_table
[SYS_mprotect
] = "mprotect";
1473 #if defined (SYS_munmap)
1474 syscall_table
[SYS_munmap
] = "munmap";
1476 #if defined (SYS_fpathconf)
1477 syscall_table
[SYS_fpathconf
] = "fpathconf";
1479 #if defined (SYS_vfork)
1480 syscall_table
[SYS_vfork
] = "vfork";
1482 #if defined (SYS_fchdir)
1483 syscall_table
[SYS_fchdir
] = "fchdir";
1485 #if defined (SYS_readv)
1486 syscall_table
[SYS_readv
] = "readv";
1488 #if defined (SYS_writev)
1489 syscall_table
[SYS_writev
] = "writev";
1491 #if defined (SYS_xstat)
1492 syscall_table
[SYS_xstat
] = "xstat";
1494 #if defined (SYS_lxstat)
1495 syscall_table
[SYS_lxstat
] = "lxstat";
1497 #if defined (SYS_fxstat)
1498 syscall_table
[SYS_fxstat
] = "fxstat";
1500 #if defined (SYS_xmknod)
1501 syscall_table
[SYS_xmknod
] = "xmknod";
1503 #if defined (SYS_clocal)
1504 syscall_table
[SYS_clocal
] = "clocal";
1506 #if defined (SYS_setrlimit)
1507 syscall_table
[SYS_setrlimit
] = "setrlimit";
1509 #if defined (SYS_getrlimit)
1510 syscall_table
[SYS_getrlimit
] = "getrlimit";
1512 #if defined (SYS_lchown)
1513 syscall_table
[SYS_lchown
] = "lchown";
1515 #if defined (SYS_memcntl)
1516 syscall_table
[SYS_memcntl
] = "memcntl";
1518 #if defined (SYS_getpmsg)
1519 syscall_table
[SYS_getpmsg
] = "getpmsg";
1521 #if defined (SYS_putpmsg)
1522 syscall_table
[SYS_putpmsg
] = "putpmsg";
1524 #if defined (SYS_rename)
1525 syscall_table
[SYS_rename
] = "rename";
1527 #if defined (SYS_uname)
1528 syscall_table
[SYS_uname
] = "uname";
1530 #if defined (SYS_setegid)
1531 syscall_table
[SYS_setegid
] = "setegid";
1533 #if defined (SYS_sysconfig)
1534 syscall_table
[SYS_sysconfig
] = "sysconfig";
1536 #if defined (SYS_adjtime)
1537 syscall_table
[SYS_adjtime
] = "adjtime";
1539 #if defined (SYS_systeminfo)
1540 syscall_table
[SYS_systeminfo
] = "systeminfo";
1542 #if defined (SYS_seteuid)
1543 syscall_table
[SYS_seteuid
] = "seteuid";
1545 #if defined (SYS_sproc)
1546 syscall_table
[SYS_sproc
] = "sproc";
1548 #if defined (SYS_keyctl)
1549 syscall_table
[SYS_keyctl
] = "keyctl";
1551 #if defined (SYS_secsys)
1552 syscall_table
[SYS_secsys
] = "secsys";
1554 #if defined (SYS_filepriv)
1555 syscall_table
[SYS_filepriv
] = "filepriv";
1557 #if defined (SYS_procpriv)
1558 syscall_table
[SYS_procpriv
] = "procpriv";
1560 #if defined (SYS_devstat)
1561 syscall_table
[SYS_devstat
] = "devstat";
1563 #if defined (SYS_aclipc)
1564 syscall_table
[SYS_aclipc
] = "aclipc";
1566 #if defined (SYS_fdevstat)
1567 syscall_table
[SYS_fdevstat
] = "fdevstat";
1569 #if defined (SYS_flvlfile)
1570 syscall_table
[SYS_flvlfile
] = "flvlfile";
1572 #if defined (SYS_lvlfile)
1573 syscall_table
[SYS_lvlfile
] = "lvlfile";
1575 #if defined (SYS_lvlequal)
1576 syscall_table
[SYS_lvlequal
] = "lvlequal";
1578 #if defined (SYS_lvlproc)
1579 syscall_table
[SYS_lvlproc
] = "lvlproc";
1581 #if defined (SYS_lvlipc)
1582 syscall_table
[SYS_lvlipc
] = "lvlipc";
1584 #if defined (SYS_acl)
1585 syscall_table
[SYS_acl
] = "acl";
1587 #if defined (SYS_auditevt)
1588 syscall_table
[SYS_auditevt
] = "auditevt";
1590 #if defined (SYS_auditctl)
1591 syscall_table
[SYS_auditctl
] = "auditctl";
1593 #if defined (SYS_auditdmp)
1594 syscall_table
[SYS_auditdmp
] = "auditdmp";
1596 #if defined (SYS_auditlog)
1597 syscall_table
[SYS_auditlog
] = "auditlog";
1599 #if defined (SYS_auditbuf)
1600 syscall_table
[SYS_auditbuf
] = "auditbuf";
1602 #if defined (SYS_lvldom)
1603 syscall_table
[SYS_lvldom
] = "lvldom";
1605 #if defined (SYS_lvlvfs)
1606 syscall_table
[SYS_lvlvfs
] = "lvlvfs";
1608 #if defined (SYS_mkmld)
1609 syscall_table
[SYS_mkmld
] = "mkmld";
1611 #if defined (SYS_mldmode)
1612 syscall_table
[SYS_mldmode
] = "mldmode";
1614 #if defined (SYS_secadvise)
1615 syscall_table
[SYS_secadvise
] = "secadvise";
1617 #if defined (SYS_online)
1618 syscall_table
[SYS_online
] = "online";
1620 #if defined (SYS_setitimer)
1621 syscall_table
[SYS_setitimer
] = "setitimer";
1623 #if defined (SYS_getitimer)
1624 syscall_table
[SYS_getitimer
] = "getitimer";
1626 #if defined (SYS_gettimeofday)
1627 syscall_table
[SYS_gettimeofday
] = "gettimeofday";
1629 #if defined (SYS_settimeofday)
1630 syscall_table
[SYS_settimeofday
] = "settimeofday";
1632 #if defined (SYS_lwp_create)
1633 syscall_table
[SYS_lwp_create
] = "_lwp_create";
1635 #if defined (SYS_lwp_exit)
1636 syscall_table
[SYS_lwp_exit
] = "_lwp_exit";
1638 #if defined (SYS_lwp_wait)
1639 syscall_table
[SYS_lwp_wait
] = "_lwp_wait";
1641 #if defined (SYS_lwp_self)
1642 syscall_table
[SYS_lwp_self
] = "_lwp_self";
1644 #if defined (SYS_lwp_info)
1645 syscall_table
[SYS_lwp_info
] = "_lwp_info";
1647 #if defined (SYS_lwp_private)
1648 syscall_table
[SYS_lwp_private
] = "_lwp_private";
1650 #if defined (SYS_processor_bind)
1651 syscall_table
[SYS_processor_bind
] = "processor_bind";
1653 #if defined (SYS_processor_exbind)
1654 syscall_table
[SYS_processor_exbind
] = "processor_exbind";
1656 #if defined (SYS_prepblock)
1657 syscall_table
[SYS_prepblock
] = "prepblock";
1659 #if defined (SYS_block)
1660 syscall_table
[SYS_block
] = "block";
1662 #if defined (SYS_rdblock)
1663 syscall_table
[SYS_rdblock
] = "rdblock";
1665 #if defined (SYS_unblock)
1666 syscall_table
[SYS_unblock
] = "unblock";
1668 #if defined (SYS_cancelblock)
1669 syscall_table
[SYS_cancelblock
] = "cancelblock";
1671 #if defined (SYS_pread)
1672 syscall_table
[SYS_pread
] = "pread";
1674 #if defined (SYS_pwrite)
1675 syscall_table
[SYS_pwrite
] = "pwrite";
1677 #if defined (SYS_truncate)
1678 syscall_table
[SYS_truncate
] = "truncate";
1680 #if defined (SYS_ftruncate)
1681 syscall_table
[SYS_ftruncate
] = "ftruncate";
1683 #if defined (SYS_lwp_kill)
1684 syscall_table
[SYS_lwp_kill
] = "_lwp_kill";
1686 #if defined (SYS_sigwait)
1687 syscall_table
[SYS_sigwait
] = "sigwait";
1689 #if defined (SYS_fork1)
1690 syscall_table
[SYS_fork1
] = "fork1";
1692 #if defined (SYS_forkall)
1693 syscall_table
[SYS_forkall
] = "forkall";
1695 #if defined (SYS_modload)
1696 syscall_table
[SYS_modload
] = "modload";
1698 #if defined (SYS_moduload)
1699 syscall_table
[SYS_moduload
] = "moduload";
1701 #if defined (SYS_modpath)
1702 syscall_table
[SYS_modpath
] = "modpath";
1704 #if defined (SYS_modstat)
1705 syscall_table
[SYS_modstat
] = "modstat";
1707 #if defined (SYS_modadm)
1708 syscall_table
[SYS_modadm
] = "modadm";
1710 #if defined (SYS_getksym)
1711 syscall_table
[SYS_getksym
] = "getksym";
1713 #if defined (SYS_lwp_suspend)
1714 syscall_table
[SYS_lwp_suspend
] = "_lwp_suspend";
1716 #if defined (SYS_lwp_continue)
1717 syscall_table
[SYS_lwp_continue
] = "_lwp_continue";
1719 #if defined (SYS_priocntllst)
1720 syscall_table
[SYS_priocntllst
] = "priocntllst";
1722 #if defined (SYS_sleep)
1723 syscall_table
[SYS_sleep
] = "sleep";
1725 #if defined (SYS_lwp_sema_wait)
1726 syscall_table
[SYS_lwp_sema_wait
] = "_lwp_sema_wait";
1728 #if defined (SYS_lwp_sema_post)
1729 syscall_table
[SYS_lwp_sema_post
] = "_lwp_sema_post";
1731 #if defined (SYS_lwp_sema_trywait)
1732 syscall_table
[SYS_lwp_sema_trywait
] = "lwp_sema_trywait";
1734 #if defined(SYS_fstatvfs64)
1735 syscall_table
[SYS_fstatvfs64
] = "fstatvfs64";
1737 #if defined(SYS_statvfs64)
1738 syscall_table
[SYS_statvfs64
] = "statvfs64";
1740 #if defined(SYS_ftruncate64)
1741 syscall_table
[SYS_ftruncate64
] = "ftruncate64";
1743 #if defined(SYS_truncate64)
1744 syscall_table
[SYS_truncate64
] = "truncate64";
1746 #if defined(SYS_getrlimit64)
1747 syscall_table
[SYS_getrlimit64
] = "getrlimit64";
1749 #if defined(SYS_setrlimit64)
1750 syscall_table
[SYS_setrlimit64
] = "setrlimit64";
1752 #if defined(SYS_lseek64)
1753 syscall_table
[SYS_lseek64
] = "lseek64";
1755 #if defined(SYS_mmap64)
1756 syscall_table
[SYS_mmap64
] = "mmap64";
1758 #if defined(SYS_pread64)
1759 syscall_table
[SYS_pread64
] = "pread64";
1761 #if defined(SYS_creat64)
1762 syscall_table
[SYS_creat64
] = "creat64";
1764 #if defined(SYS_dshmsys)
1765 syscall_table
[SYS_dshmsys
] = "dshmsys";
1767 #if defined(SYS_invlpg)
1768 syscall_table
[SYS_invlpg
] = "invlpg";
1770 #if defined(SYS_cg_ids)
1771 syscall_table
[SYS_cg_ids
] = "cg_ids";
1773 #if defined(SYS_cg_processors)
1774 syscall_table
[SYS_cg_processors
] = "cg_processors";
1776 #if defined(SYS_cg_info)
1777 syscall_table
[SYS_cg_info
] = "cg_info";
1779 #if defined(SYS_cg_bind)
1780 syscall_table
[SYS_cg_bind
] = "cg_bind";
1782 #if defined(SYS_cg_current)
1783 syscall_table
[SYS_cg_current
] = "cg_current";
1785 #if defined(SYS_cg_memloc)
1786 syscall_table
[SYS_cg_memloc
] = "cg_memloc";
1794 procfs_kill_inferior - kill any currently inferior
1798 void procfs_kill_inferior (void)
1802 Kill any current inferior.
1806 Kills even attached inferiors. Presumably the user has already
1807 been prompted that the inferior is an attached one rather than
1808 one started by gdb. (FIXME?)
1813 procfs_kill_inferior ()
1815 target_mourn_inferior ();
1822 unconditionally_kill_inferior - terminate the inferior
1826 static void unconditionally_kill_inferior (struct procinfo *)
1830 Kill the specified inferior.
1834 A possibly useful enhancement would be to first try sending
1835 the inferior a terminate signal, politely asking it to commit
1836 suicide, before we murder it (we could call that
1837 politely_kill_inferior()).
1842 unconditionally_kill_inferior (pi
)
1843 struct procinfo
*pi
;
1846 struct proc_ctl pctl
;
1848 ppid
= pi
->prstatus
.pr_ppid
;
1850 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
1851 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1852 before the PIOCKILL, otherwise it might generate a corrupted core
1853 file for the inferior. */
1854 ioctl (pi
->ctl_fd
, PIOCSSIG
, NULL
);
1856 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1857 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1858 to kill the inferior, otherwise it might remain stopped with a
1860 We do not check the result of the PIOCSSIG, the inferior might have
1863 struct siginfo newsiginfo
;
1865 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
1866 newsiginfo
.si_signo
= SIGKILL
;
1867 newsiginfo
.si_code
= 0;
1868 newsiginfo
.si_errno
= 0;
1869 newsiginfo
.si_pid
= getpid ();
1870 newsiginfo
.si_uid
= getuid ();
1871 ioctl (pi
->ctl_fd
, PIOCSSIG
, &newsiginfo
);
1873 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1874 procfs_write_pckill (pi
);
1875 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1877 close_proc_file (pi
);
1879 /* Only wait() for our direct children. Our grandchildren zombies are killed
1880 by the death of their parents. */
1882 if (ppid
== getpid())
1890 procfs_xfer_memory -- copy data to or from inferior memory space
1894 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1895 int dowrite, struct target_ops target)
1899 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1900 from/to debugger memory starting at MYADDR. Copy from inferior
1901 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1903 Returns the length copied, which is either the LEN argument or
1904 zero. This xfer function does not do partial moves, since procfs_ops
1905 doesn't allow memory operations to cross below us in the target stack
1910 The /proc interface makes this an almost trivial task.
1914 procfs_xfer_memory (memaddr
, myaddr
, len
, dowrite
, target
)
1919 struct target_ops
*target
; /* ignored */
1922 struct procinfo
*pi
;
1924 pi
= current_procinfo
;
1926 if (lseek(pi
->as_fd
, (off_t
) memaddr
, SEEK_SET
) == (off_t
) memaddr
)
1930 nbytes
= write (pi
->as_fd
, myaddr
, len
);
1934 nbytes
= read (pi
->as_fd
, myaddr
, len
);
1948 procfs_store_registers -- copy register values back to inferior
1952 void procfs_store_registers (int regno)
1956 Store our current register values back into the inferior. If
1957 REGNO is -1 then store all the register, otherwise store just
1958 the value specified by REGNO.
1962 If we are storing only a single register, we first have to get all
1963 the current values from the process, overwrite the desired register
1964 in the gregset with the one we want from gdb's registers, and then
1965 send the whole set back to the process. For writing all the
1966 registers, all we have to do is generate the gregset and send it to
1969 Also note that the process has to be stopped on an event of interest
1970 for this to work, which basically means that it has to have been
1971 run under the control of one of the other /proc ioctl calls and not
1972 ptrace. Since we don't use ptrace anyway, we don't worry about this
1973 fine point, but it is worth noting for future reference.
1975 Gdb is confused about what this function is supposed to return.
1976 Some versions return a value, others return nothing. Some are
1977 declared to return a value and actually return nothing. Gdb ignores
1978 anything returned. (FIXME)
1983 procfs_store_registers (regno
)
1986 struct procinfo
*pi
;
1987 #ifdef PROCFS_USE_READ_WRITE
1988 struct greg_ctl greg
;
1989 struct fpreg_ctl fpreg
;
1992 pi
= current_procinfo
;
1994 #ifdef PROCFS_USE_READ_WRITE
1997 procfs_read_status (pi
);
1998 memcpy ((char *) &greg
.gregset
,
1999 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
,
2000 sizeof (gregset_t
));
2002 fill_gregset (&greg
.gregset
, regno
);
2004 write (pi
->ctl_fd
, &greg
, sizeof (greg
));
2005 #else /* PROCFS_USE_READ_WRITE */
2008 ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
);
2010 fill_gregset (&pi
->gregset
.gregset
, regno
);
2011 ioctl (pi
->ctl_fd
, PIOCSREG
, &pi
->gregset
.gregset
);
2012 #endif /* PROCFS_USE_READ_WRITE */
2014 #if defined (FP0_REGNUM)
2016 /* Now repeat everything using the floating point register set, if the
2017 target has floating point hardware. Since we ignore the returned value,
2018 we'll never know whether it worked or not anyway. */
2020 #ifdef PROCFS_USE_READ_WRITE
2023 procfs_read_status (pi
);
2024 memcpy ((char *) &fpreg
.fpregset
,
2025 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
,
2026 sizeof (fpregset_t
));
2028 fill_fpregset (&fpreg
.fpregset
, regno
);
2029 fpreg
.cmd
= PCSFPREG
;
2030 write (pi
->ctl_fd
, &fpreg
, sizeof (fpreg
));
2031 #else /* PROCFS_USE_READ_WRITE */
2034 ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
);
2036 fill_fpregset (&pi
->fpregset
.fpregset
, regno
);
2037 ioctl (pi
->ctl_fd
, PIOCSFPREG
, &pi
->fpregset
.fpregset
);
2038 #endif /* PROCFS_USE_READ_WRITE */
2040 #endif /* FP0_REGNUM */
2048 init_procinfo - setup a procinfo struct and connect it to a process
2052 struct procinfo * init_procinfo (int pid)
2056 Allocate a procinfo structure, open the /proc file and then set up the
2057 set of signals and faults that are to be traced. Returns a pointer to
2058 the new procinfo structure.
2062 If proc_init_failed ever gets called, control returns to the command
2063 processing loop via the standard error handling code.
2067 static struct procinfo
*
2068 init_procinfo (pid
, kill
)
2072 struct procinfo
*pi
= (struct procinfo
*)
2073 xmalloc (sizeof (struct procinfo
));
2074 struct sig_ctl sctl
;
2075 struct flt_ctl fctl
;
2077 memset ((char *) pi
, 0, sizeof (*pi
));
2078 if (!open_proc_file (pid
, pi
, O_RDWR
, 1))
2079 proc_init_failed (pi
, "can't open process file", kill
);
2081 /* open_proc_file may modify pid. */
2085 /* Add new process to process info list */
2087 pi
->next
= procinfo_list
;
2090 add_fd (pi
); /* Add to list for poll/select */
2092 /* Remember some things about the inferior that we will, or might, change
2093 so that we can restore them when we detach. */
2095 memcpy ((char *) &pi
->saved_trace
.sigset
,
2096 (char *) &pi
->prstatus
.pr_sigtrace
, sizeof (sigset_t
));
2097 memcpy ((char *) &pi
->saved_fltset
.fltset
,
2098 (char *) &pi
->prstatus
.pr_flttrace
, sizeof (fltset_t
));
2099 memcpy ((char *) &pi
->saved_entryset
.sysset
,
2100 (char *) &pi
->prstatus
.pr_sysentry
, sizeof (sysset_t
));
2101 memcpy ((char *) &pi
->saved_exitset
.sysset
,
2102 (char *) &pi
->prstatus
.pr_sysexit
, sizeof (sysset_t
));
2104 /* Set up trace and fault sets, as gdb expects them. */
2106 prfillset (&sctl
.sigset
);
2107 notice_signals (pi
, &sctl
);
2108 prfillset (&fctl
.fltset
);
2109 prdelset (&fctl
.fltset
, FLTPAGE
);
2111 #else /* ! UNIXWARE */
2112 ioctl (pi
->ctl_fd
, PIOCGTRACE
, &pi
->saved_trace
.sigset
);
2113 ioctl (pi
->ctl_fd
, PIOCGHOLD
, &pi
->saved_sighold
.sigset
);
2114 ioctl (pi
->ctl_fd
, PIOCGFAULT
, &pi
->saved_fltset
.fltset
);
2115 ioctl (pi
->ctl_fd
, PIOCGENTRY
, &pi
->saved_entryset
.sysset
);
2116 ioctl (pi
->ctl_fd
, PIOCGEXIT
, &pi
->saved_exitset
.sysset
);
2118 /* Set up trace and fault sets, as gdb expects them. */
2120 memset ((char *) &pi
->prrun
, 0, sizeof (pi
->prrun
));
2121 prfillset (&pi
->prrun
.pr_trace
);
2122 procfs_notice_signals (pid
);
2123 prfillset (&pi
->prrun
.pr_fault
);
2124 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
2125 #ifdef PROCFS_DONT_TRACE_FAULTS
2126 premptyset (&pi
->prrun
.pr_fault
);
2128 #endif /* UNIXWARE */
2130 if (!procfs_read_status (pi
))
2131 proc_init_failed (pi
, "procfs_read_status failed", kill
);
2140 create_procinfo - initialize access to a /proc entry
2144 struct procinfo * create_procinfo (int pid)
2148 Allocate a procinfo structure, open the /proc file and then set up the
2149 set of signals and faults that are to be traced. Returns a pointer to
2150 the new procinfo structure.
2154 If proc_init_failed ever gets called, control returns to the command
2155 processing loop via the standard error handling code.
2159 static struct procinfo
*
2160 create_procinfo (pid
)
2163 struct procinfo
*pi
;
2164 struct sig_ctl sctl
;
2165 struct flt_ctl fctl
;
2167 pi
= find_procinfo (pid
, 1);
2169 return pi
; /* All done! It already exists */
2171 pi
= init_procinfo (pid
, 1);
2174 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2175 already stopped, even if they all have PR_ASYNC set. */
2176 if (!(pi
->prstatus
.pr_flags
& PR_STOPPED
))
2178 if (!procfs_write_pcwstop (pi
))
2179 proc_init_failed (pi
, "procfs_write_pcwstop failed", 1);
2181 #ifdef PROCFS_USE_READ_WRITE
2182 fctl
.cmd
= PCSFAULT
;
2183 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
2184 proc_init_failed (pi
, "PCSFAULT failed", 1);
2186 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
) < 0)
2187 proc_init_failed (pi
, "PIOCSFAULT failed", 1);
2197 procfs_exit_handler - handle entry into the _exit syscall
2201 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2205 This routine is called when an inferior process enters the _exit()
2206 system call. It continues the process, and then collects the exit
2207 status and pid which are returned in *statvalp and *rtnvalp. After
2208 that it returns non-zero to indicate that procfs_wait should wake up.
2211 There is probably a better way to do this.
2216 procfs_exit_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2217 struct procinfo
*pi
;
2223 struct procinfo
*temp_pi
, *next_pi
;
2224 struct proc_ctl pctl
;
2228 pctl
.data
= PRCFAULT
;
2230 pi
->prrun
.pr_flags
= PRCFAULT
;
2233 #ifdef PROCFS_USE_READ_WRITE
2234 if (write (pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
2236 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2238 perror_with_name (pi
->pathname
);
2242 /* Claim it exited (don't call wait). */
2244 printf_filtered ("(attached process has exited)\n");
2246 *rtnvalp
= inferior_pid
;
2250 *rtnvalp
= wait (statvalp
);
2255 /* Close ALL open proc file handles,
2256 except the one that called SYS_exit. */
2257 for (temp_pi
= procinfo_list
; temp_pi
; temp_pi
= next_pi
)
2259 next_pi
= temp_pi
->next
;
2261 continue; /* Handled below */
2262 close_proc_file (temp_pi
);
2271 procfs_exec_handler - handle exit from the exec family of syscalls
2275 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2279 This routine is called when an inferior process is about to finish any
2280 of the exec() family of system calls. It pretends that we got a
2281 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2282 to tell procfs_wait to wake up.
2285 This need for compatibility with ptrace is questionable. In the
2286 future, it shouldn't be necessary.
2291 procfs_exec_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2292 struct procinfo
*pi
;
2298 *statvalp
= (SIGTRAP
<< 8) | 0177;
2303 #if defined(SYS_sproc) && !defined(UNIXWARE)
2304 /* IRIX lwp creation system call */
2310 procfs_sproc_handler - handle exit from the sproc syscall
2314 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2318 This routine is called when an inferior process is about to finish an
2319 sproc() system call. This is the system call that IRIX uses to create
2320 a lightweight process. When the target process gets this event, we can
2321 look at rval1 to find the new child processes ID, and create a new
2322 procinfo struct from that.
2324 After that, it pretends that we got a SIGTRAP, and returns non-zero
2325 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2326 woken up, sees the new process and continues it.
2329 We actually never see the child exiting from sproc because we will
2330 shortly stop the child with PIOCSTOP, which is then registered as the
2335 procfs_sproc_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2336 struct procinfo
*pi
;
2342 /* We've just detected the completion of an sproc system call. Now we need to
2343 setup a procinfo struct for this thread, and notify the thread system of the
2346 /* If sproc failed, then nothing interesting happened. Continue the process
2347 and go back to sleep. */
2349 if (pi
->prstatus
.pr_errno
!= 0)
2351 pi
->prrun
.pr_flags
&= PRSTEP
;
2352 pi
->prrun
.pr_flags
|= PRCFAULT
;
2354 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2355 perror_with_name (pi
->pathname
);
2360 /* At this point, the new thread is stopped at it's first instruction, and
2361 the parent is stopped at the exit from sproc. */
2363 /* Notify the caller of the arrival of a new thread. */
2364 create_procinfo (pi
->prstatus
.pr_rval1
);
2366 *rtnvalp
= pi
->prstatus
.pr_rval1
;
2367 *statvalp
= (SIGTRAP
<< 8) | 0177;
2376 procfs_fork_handler - handle exit from the fork syscall
2380 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2384 This routine is called when an inferior process is about to finish a
2385 fork() system call. We will open up the new process, and then close
2386 it, which releases it from the clutches of the debugger.
2388 After that, we continue the target process as though nothing had
2392 This is necessary for IRIX because we have to set PR_FORK in order
2393 to catch the creation of lwps (via sproc()). When an actual fork
2394 occurs, it becomes necessary to reset the forks debugger flags and
2395 continue it because we can't hack multiple processes yet.
2399 procfs_fork_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2400 struct procinfo
*pi
;
2406 struct procinfo
*pitemp
;
2408 /* At this point, we've detected the completion of a fork (or vfork) call in
2409 our child. The grandchild is also stopped because we set inherit-on-fork
2410 earlier. (Note that nobody has the grandchilds' /proc file open at this
2411 point.) We will release the grandchild from the debugger by opening it's
2412 /proc file and then closing it. Since run-on-last-close is set, the
2413 grandchild continues on its' merry way. */
2416 pitemp
= create_procinfo (pi
->prstatus
.pr_rval1
);
2418 close_proc_file (pitemp
);
2420 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2421 perror_with_name (pi
->pathname
);
2425 #endif /* SYS_sproc && !UNIXWARE */
2431 procfs_set_inferior_syscall_traps - setup the syscall traps
2435 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2439 Called for each "procinfo" (process, thread, or LWP) in the
2440 inferior, to register for notification of and handlers for
2441 syscall traps in the inferior.
2446 procfs_set_inferior_syscall_traps (pip
)
2447 struct procinfo
*pip
;
2449 procfs_set_syscall_trap (pip
, SYS_exit
, PROCFS_SYSCALL_ENTRY
,
2450 procfs_exit_handler
);
2452 #ifndef PRFS_STOPEXEC
2454 procfs_set_syscall_trap (pip
, SYS_exec
, PROCFS_SYSCALL_EXIT
,
2455 procfs_exec_handler
);
2458 procfs_set_syscall_trap (pip
, SYS_execv
, PROCFS_SYSCALL_EXIT
,
2459 procfs_exec_handler
);
2462 procfs_set_syscall_trap (pip
, SYS_execve
, PROCFS_SYSCALL_EXIT
,
2463 procfs_exec_handler
);
2465 #endif /* PRFS_STOPEXEC */
2467 /* Setup traps on exit from sproc() */
2470 procfs_set_syscall_trap (pip
, SYS_sproc
, PROCFS_SYSCALL_EXIT
,
2471 procfs_sproc_handler
);
2472 procfs_set_syscall_trap (pip
, SYS_fork
, PROCFS_SYSCALL_EXIT
,
2473 procfs_fork_handler
);
2475 procfs_set_syscall_trap (pip
, SYS_vfork
, PROCFS_SYSCALL_EXIT
,
2476 procfs_fork_handler
);
2478 /* Turn on inherit-on-fork flag so that all children of the target process
2479 start with tracing flags set. This allows us to trap lwp creation. Note
2480 that we also have to trap on fork and vfork in order to disable all tracing
2481 in the targets child processes. */
2483 modify_inherit_on_fork_flag (pip
->ctl_fd
, 1);
2486 #ifdef SYS_lwp_create
2487 procfs_set_syscall_trap (pip
, SYS_lwp_create
, PROCFS_SYSCALL_EXIT
,
2488 procfs_lwp_creation_handler
);
2496 procfs_init_inferior - initialize target vector and access to a
2501 int procfs_init_inferior (int pid)
2505 When gdb starts an inferior, this function is called in the parent
2506 process immediately after the fork. It waits for the child to stop
2507 on the return from the exec system call (the child itself takes care
2508 of ensuring that this is set up), then sets up the set of signals
2509 and faults that are to be traced. Returns the pid, which may have had
2510 the thread-id added to it.
2514 If proc_init_failed ever gets called, control returns to the command
2515 processing loop via the standard error handling code.
2520 procfs_init_inferior (pid
)
2523 struct procinfo
*pip
;
2525 push_target (&procfs_ops
);
2527 pip
= create_procinfo (pid
);
2529 procfs_set_inferior_syscall_traps (pip
);
2531 /* create_procinfo may change the pid, so we have to update inferior_pid
2532 here before calling other gdb routines that need the right pid. */
2537 add_thread (pip
-> pid
); /* Setup initial thread */
2539 #ifdef START_INFERIOR_TRAPS_EXPECTED
2540 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
2542 /* One trap to exec the shell, one to exec the program being debugged. */
2543 startup_inferior (2);
2553 procfs_notice_signals
2557 static void procfs_notice_signals (int pid);
2561 When the user changes the state of gdb's signal handling via the
2562 "handle" command, this function gets called to see if any change
2563 in the /proc interface is required. It is also called internally
2564 by other /proc interface functions to initialize the state of
2565 the traced signal set.
2567 One thing it does is that signals for which the state is "nostop",
2568 "noprint", and "pass", have their trace bits reset in the pr_trace
2569 field, so that they are no longer traced. This allows them to be
2570 delivered directly to the inferior without the debugger ever being
2575 procfs_notice_signals (pid
)
2578 struct procinfo
*pi
;
2579 struct sig_ctl sctl
;
2581 pi
= find_procinfo (pid
, 0);
2584 premptyset (&sctl
.sigset
);
2586 sctl
.sigset
= pi
->prrun
.pr_trace
;
2589 notice_signals (pi
, &sctl
);
2592 pi
->prrun
.pr_trace
= sctl
.sigset
;
2597 notice_signals (pi
, sctl
)
2598 struct procinfo
*pi
;
2599 struct sig_ctl
*sctl
;
2603 for (signo
= 0; signo
< NSIG
; signo
++)
2605 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
2606 signal_print_state (target_signal_from_host (signo
)) == 0 &&
2607 signal_pass_state (target_signal_from_host (signo
)) == 1)
2609 prdelset (&sctl
->sigset
, signo
);
2613 praddset (&sctl
->sigset
, signo
);
2616 #ifdef PROCFS_USE_READ_WRITE
2617 sctl
->cmd
= PCSTRACE
;
2618 if (write (pi
->ctl_fd
, (char *) sctl
, sizeof (struct sig_ctl
)) < 0)
2620 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &sctl
->sigset
))
2623 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2631 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2635 void proc_set_exec_trap (void)
2639 This function is called in the child process when starting up
2640 an inferior, prior to doing the exec of the actual inferior.
2641 It sets the child process's exitset to make exit from the exec
2642 system call an event of interest to stop on, and then simply
2643 returns. The child does the exec, the system call returns, and
2644 the child stops at the first instruction, ready for the gdb
2645 parent process to take control of it.
2649 We need to use all local variables since the child may be sharing
2650 it's data space with the parent, if vfork was used rather than
2653 Also note that we want to turn off the inherit-on-fork flag in
2654 the child process so that any grand-children start with all
2655 tracing flags cleared.
2659 proc_set_exec_trap ()
2661 struct sys_ctl exitset
;
2662 struct sys_ctl entryset
;
2663 char procname
[MAX_PROC_NAME_SIZE
];
2666 sprintf (procname
, CTL_PROC_NAME_FMT
, getpid ());
2668 if ((fd
= open (procname
, O_WRONLY
)) < 0)
2670 if ((fd
= open (procname
, O_RDWR
)) < 0)
2674 gdb_flush (gdb_stderr
);
2677 premptyset (&exitset
.sysset
);
2678 premptyset (&entryset
.sysset
);
2680 #ifdef PRFS_STOPEXEC
2681 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2682 exits from exec system calls because of the user level loader. */
2686 if (ioctl (fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
2689 gdb_flush (gdb_stderr
);
2692 prfs_flags
|= PRFS_STOPEXEC
;
2693 if (ioctl (fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
2696 gdb_flush (gdb_stderr
);
2700 #else /* PRFS_STOPEXEC */
2702 Not all systems with /proc have all the exec* syscalls with the same
2703 names. On the SGI, for example, there is no SYS_exec, but there
2704 *is* a SYS_execv. So, we try to account for that. */
2707 praddset (&exitset
.sysset
, SYS_exec
);
2710 praddset (&exitset
.sysset
, SYS_execve
);
2713 praddset (&exitset
.sysset
, SYS_execv
);
2716 #ifdef PROCFS_USE_READ_WRITE
2717 exitset
.cmd
= PCSEXIT
;
2718 if (write (fd
, (char *) &exitset
, sizeof (struct sys_ctl
)) < 0)
2720 if (ioctl (fd
, PIOCSEXIT
, &exitset
.sysset
) < 0)
2724 gdb_flush (gdb_stderr
);
2727 #endif /* PRFS_STOPEXEC */
2729 praddset (&entryset
.sysset
, SYS_exit
);
2731 #ifdef PROCFS_USE_READ_WRITE
2732 entryset
.cmd
= PCSENTRY
;
2733 if (write (fd
, (char *) &entryset
, sizeof (struct sys_ctl
)) < 0)
2735 if (ioctl (fd
, PIOCSENTRY
, &entryset
.sysset
) < 0)
2739 gdb_flush (gdb_stderr
);
2743 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2744 start with tracing flags cleared. */
2746 modify_inherit_on_fork_flag (fd
, 0);
2748 /* Turn on run-on-last-close flag so that this process will not hang
2749 if GDB goes away for some reason. */
2751 modify_run_on_last_close_flag (fd
, 1);
2753 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2754 /* NOTE: revisit when doing thread support for UW */
2758 struct proc_ctl pctl
;
2760 /* Solaris needs this to make procfs treat all threads seperately. Without
2761 this, all threads halt whenever something happens to any thread. Since
2762 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2764 pr_flags
= PR_ASYNC
;
2765 #ifdef PROCFS_USE_READ_WRITE
2767 pctl
.data
= PR_FORK
|PR_ASYNC
;
2768 write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
));
2770 ioctl (fd
, PIOCSET
, &pr_flags
);
2773 #endif /* PR_ASYNC */
2774 #endif /* !UNIXWARE */
2781 proc_iterate_over_mappings -- call function for every mapped space
2785 int proc_iterate_over_mappings (int (*func)())
2789 Given a pointer to a function, call that function for every
2790 mapped address space, passing it an open file descriptor for
2791 the file corresponding to that mapped address space (if any)
2792 and the base address of the mapped space. Quit when we hit
2793 the end of the mappings or the function returns nonzero.
2798 proc_iterate_over_mappings (func
)
2799 int (*func
) PARAMS ((int, CORE_ADDR
));
2806 struct procinfo
*pi
;
2809 pi
= current_procinfo
;
2811 if (fstat (pi
->map_fd
, &sbuf
) < 0)
2814 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
2815 prmaps
= (prmap_t
*) alloca (nmap
* sizeof(prmap_t
));
2816 if ((lseek (pi
->map_fd
, 0, SEEK_SET
) == 0) &&
2817 (read (pi
->map_fd
, (char *) prmaps
, nmap
* sizeof (prmap_t
)) ==
2818 (nmap
* sizeof (prmap_t
))))
2821 for (prmap
= prmaps
; i
< nmap
&& funcstat
== 0; ++prmap
, ++i
)
2823 char name
[sizeof ("/proc/1234567890/object") +
2824 sizeof (prmap
->pr_mapname
)];
2825 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, prmap
->pr_mapname
);
2826 if ((fd
= open (name
, O_RDONLY
)) == -1)
2831 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
->pr_vaddr
);
2837 #else /* UNIXWARE */
2839 proc_iterate_over_mappings (func
)
2840 int (*func
) PARAMS ((int, CORE_ADDR
));
2845 struct prmap
*prmaps
;
2846 struct prmap
*prmap
;
2847 struct procinfo
*pi
;
2849 pi
= current_procinfo
;
2851 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2853 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2854 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2856 for (prmap
= prmaps
; prmap
-> pr_size
&& funcstat
== 0; ++prmap
)
2858 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
-> pr_vaddr
, 0);
2859 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
-> pr_vaddr
);
2866 #endif /* UNIXWARE */
2868 #if 0 /* Currently unused */
2873 proc_base_address -- find base address for segment containing address
2877 CORE_ADDR proc_base_address (CORE_ADDR addr)
2881 Given an address of a location in the inferior, find and return
2882 the base address of the mapped segment containing that address.
2884 This is used for example, by the shared library support code,
2885 where we have the pc value for some location in the shared library
2886 where we are stopped, and need to know the base address of the
2887 segment containing that address.
2891 proc_base_address (addr
)
2895 struct prmap
*prmaps
;
2896 struct prmap
*prmap
;
2897 CORE_ADDR baseaddr
= 0;
2898 struct procinfo
*pi
;
2900 pi
= current_procinfo
;
2902 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2904 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2905 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2907 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
2909 if ((prmap
-> pr_vaddr
<= (caddr_t
) addr
) &&
2910 (prmap
-> pr_vaddr
+ prmap
-> pr_size
> (caddr_t
) addr
))
2912 baseaddr
= (CORE_ADDR
) prmap
-> pr_vaddr
;
2928 proc_address_to_fd -- return open fd for file mapped to address
2932 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2936 Given an address in the current inferior's address space, use the
2937 /proc interface to find an open file descriptor for the file that
2938 this address was mapped in from. Return -1 if there is no current
2939 inferior. Print a warning message if there is an inferior but
2940 the address corresponds to no file (IE a bogus address).
2945 proc_address_to_fd (pi
, addr
, complain
)
2946 struct procinfo
*pi
;
2952 if ((fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, (caddr_t
*) &addr
)) < 0)
2956 print_sys_errmsg (pi
->pathname
, errno
);
2957 warning ("can't find mapped file for address 0x%x", addr
);
2962 #endif /* !UNIXWARE */
2964 /* Attach to process PID, then initialize for debugging it
2965 and wait for the trace-trap that results from attaching. */
2968 procfs_attach (args
, from_tty
)
2976 error_no_arg ("process-id to attach");
2980 if (pid
== getpid()) /* Trying to masturbate? */
2981 error ("I refuse to debug myself!");
2985 exec_file
= (char *) get_exec_file (0);
2988 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
2990 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid
));
2992 gdb_flush (gdb_stdout
);
2995 inferior_pid
= pid
= do_attach (pid
);
2996 push_target (&procfs_ops
);
3000 /* Take a program previously attached to and detaches it.
3001 The program resumes execution and will no longer stop
3002 on signals, etc. We'd better not have left any breakpoints
3003 in the program or it'll die when it hits one. For this
3004 to work, it may be necessary for the process to have been
3005 previously attached. It *might* work if the program was
3006 started via the normal ptrace (PTRACE_TRACEME). */
3009 procfs_detach (args
, from_tty
)
3017 char *exec_file
= get_exec_file (0);
3020 printf_unfiltered ("Detaching from program: %s %s\n",
3021 exec_file
, target_pid_to_str (inferior_pid
));
3022 gdb_flush (gdb_stdout
);
3025 siggnal
= atoi (args
);
3027 do_detach (siggnal
);
3029 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
3032 /* Get ready to modify the registers array. On machines which store
3033 individual registers, this doesn't need to do anything. On machines
3034 which store all the registers in one fell swoop, this makes sure
3035 that registers contains all the registers from the program being
3039 procfs_prepare_to_store ()
3041 #ifdef CHILD_PREPARE_TO_STORE
3042 CHILD_PREPARE_TO_STORE ();
3046 /* Print status information about what we're accessing. */
3049 procfs_files_info (ignore
)
3050 struct target_ops
*ignore
;
3052 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3053 attach_flag
? "attached": "child", target_pid_to_str (inferior_pid
));
3058 procfs_open (arg
, from_tty
)
3062 error ("Use the \"run\" command to start a Unix child process.");
3069 do_attach -- attach to an already existing process
3073 int do_attach (int pid)
3077 Attach to an already existing process with the specified process
3078 id. If the process is not already stopped, query whether to
3083 The option of stopping at attach time is specific to the /proc
3084 versions of gdb. Versions using ptrace force the attachee
3085 to stop. (I have changed this version to do so, too. All you
3086 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3094 struct procinfo
*pi
;
3095 struct sig_ctl sctl
;
3096 struct flt_ctl fctl
;
3099 pi
= init_procinfo (pid
, 0);
3102 nlwp
= pi
->prstatus
.pr_nlwp
;
3103 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (id_t
));
3105 if (ioctl (pi
->ctl_fd
, PIOCLWPIDS
, lwps
))
3107 print_sys_errmsg (pi
-> pathname
, errno
);
3108 error ("PIOCLWPIDS failed");
3110 #else /* PIOCLWPIDS */
3112 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
3115 for (; nlwp
> 0; nlwp
--, lwps
++)
3117 /* First one has already been created above. */
3118 if ((pi
= find_procinfo ((*lwps
<< 16) | pid
, 1)) == 0)
3119 pi
= init_procinfo ((*lwps
<< 16) | pid
, 0);
3122 if (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3124 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3127 pi
->was_stopped
= 1;
3131 pi
->was_stopped
= 0;
3132 if (1 || query ("Process is currently running, stop it? "))
3135 /* Make it run again when we close it. */
3136 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3137 #ifdef PROCFS_USE_READ_WRITE
3139 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3141 if (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
3144 print_sys_errmsg (pi
->pathname
, errno
);
3145 close_proc_file (pi
);
3146 error ("PIOCSTOP failed");
3149 if (!procfs_read_status (pi
))
3151 print_sys_errmsg (pi
->pathname
, errno
);
3152 close_proc_file (pi
);
3153 error ("procfs_read_status failed");
3156 pi
->nopass_next_sigstop
= 1;
3160 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3161 target_pid_to_str (pi
->pid
));
3165 #ifdef PROCFS_USE_READ_WRITE
3166 fctl
.cmd
= PCSFAULT
;
3167 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
3168 print_sys_errmsg ("PCSFAULT failed", errno
);
3169 #else /* PROCFS_USE_READ_WRITE */
3170 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
3172 print_sys_errmsg ("PIOCSFAULT failed", errno
);
3174 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
3176 print_sys_errmsg ("PIOCSTRACE failed", errno
);
3178 add_thread (pi
->pid
);
3179 procfs_set_inferior_syscall_traps (pi
);
3180 #endif /* PROCFS_USE_READ_WRITE */
3190 do_detach -- detach from an attached-to process
3194 void do_detach (int signal)
3198 Detach from the current attachee.
3200 If signal is non-zero, the attachee is started running again and sent
3201 the specified signal.
3203 If signal is zero and the attachee was not already stopped when we
3204 attached to it, then we make it runnable again when we detach.
3206 Otherwise, we query whether or not to make the attachee runnable
3207 again, since we may simply want to leave it in the state it was in
3210 We report any problems, but do not consider them errors, since we
3211 MUST detach even if some things don't seem to go right. This may not
3212 be the ideal situation. (FIXME).
3219 struct procinfo
*pi
;
3221 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3225 set_proc_siginfo (pi
, signal
);
3227 #ifdef PROCFS_USE_READ_WRITE
3228 pi
->saved_exitset
.cmd
= PCSEXIT
;
3229 if (write (pi
->ctl_fd
, (char *) &pi
->saved_exitset
,
3230 sizeof (struct sys_ctl
)) < 0)
3232 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &pi
->saved_exitset
.sysset
) < 0)
3235 print_sys_errmsg (pi
->pathname
, errno
);
3236 printf_unfiltered ("PIOCSEXIT failed.\n");
3238 #ifdef PROCFS_USE_READ_WRITE
3239 pi
->saved_entryset
.cmd
= PCSENTRY
;
3240 if (write (pi
->ctl_fd
, (char *) &pi
->saved_entryset
,
3241 sizeof (struct sys_ctl
)) < 0)
3243 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &pi
->saved_entryset
.sysset
) < 0)
3246 print_sys_errmsg (pi
->pathname
, errno
);
3247 printf_unfiltered ("PIOCSENTRY failed.\n");
3249 #ifdef PROCFS_USE_READ_WRITE
3250 pi
->saved_trace
.cmd
= PCSTRACE
;
3251 if (write (pi
->ctl_fd
, (char *) &pi
->saved_trace
,
3252 sizeof (struct sig_ctl
)) < 0)
3254 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->saved_trace
.sigset
) < 0)
3257 print_sys_errmsg (pi
->pathname
, errno
);
3258 printf_unfiltered ("PIOCSTRACE failed.\n");
3261 if (ioctl (pi
->ctl_fd
, PIOCSHOLD
, &pi
->saved_sighold
.sigset
) < 0)
3263 print_sys_errmsg (pi
->pathname
, errno
);
3264 printf_unfiltered ("PIOSCHOLD failed.\n");
3267 #ifdef PROCFS_USE_READ_WRITE
3268 pi
->saved_fltset
.cmd
= PCSFAULT
;
3269 if (write (pi
->ctl_fd
, (char *) &pi
->saved_fltset
,
3270 sizeof (struct flt_ctl
)) < 0)
3272 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->saved_fltset
.fltset
) < 0)
3275 print_sys_errmsg (pi
->pathname
, errno
);
3276 printf_unfiltered ("PIOCSFAULT failed.\n");
3278 if (!procfs_read_status (pi
))
3280 print_sys_errmsg (pi
->pathname
, errno
);
3281 printf_unfiltered ("procfs_read_status failed.\n");
3286 if (signal
|| (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3288 if (signal
|| (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3292 struct proc_ctl pctl
;
3294 if (signal
|| !pi
->was_stopped
||
3295 query ("Was stopped when attached, make it runnable again? "))
3297 /* Clear any pending signal if we want to detach without
3300 set_proc_siginfo (pi
, signal
);
3302 /* Clear any fault that might have stopped it. */
3303 #ifdef PROCFS_USE_READ_WRITE
3305 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3307 if (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0))
3310 print_sys_errmsg (pi
->pathname
, errno
);
3311 printf_unfiltered ("PIOCCFAULT failed.\n");
3314 /* Make it run again when we close it. */
3316 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3320 close_proc_file (pi
);
3325 /* emulate wait() as much as possible.
3326 Wait for child to do something. Return pid of child, or -1 in case
3327 of error; store status in *OURSTATUS.
3329 Not sure why we can't
3330 just use wait(), but it seems to have problems when applied to a
3331 process being controlled with the /proc interface.
3333 We have a race problem here with no obvious solution. We need to let
3334 the inferior run until it stops on an event of interest, which means
3335 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3336 ioctl if the process is already stopped on something that is not an
3337 event of interest, or the call will hang indefinitely. Thus we first
3338 use PIOCSTATUS to see if the process is not stopped. If not, then we
3339 use PIOCWSTOP. But during the window between the two, if the process
3340 stops for any reason that is not an event of interest (such as a job
3341 control signal) then gdb will hang. One possible workaround is to set
3342 an alarm to wake up every minute of so and check to see if the process
3343 is still running, and if so, then reissue the PIOCWSTOP. But this is
3344 a real kludge, so has not been implemented. FIXME: investigate
3347 FIXME: Investigate why wait() seems to have problems with programs
3348 being control by /proc routines. */
3350 procfs_wait (pid
, ourstatus
)
3352 struct target_waitstatus
*ourstatus
;
3359 struct procinfo
*pi
;
3360 struct proc_ctl pctl
;
3362 if (pid
!= -1) /* Non-specific process? */
3365 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3380 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3381 if (pi
->pid
== pid
&& pi
->had_event
)
3384 if (!pi
&& !checkerr
)
3388 if (!checkerr
&& !(pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3390 if (!checkerr
&& !(pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3393 if (!procfs_write_pcwstop (pi
))
3400 if (errno
== ENOENT
)
3402 /* XXX Fixme -- what to do if attached? Can't call wait... */
3403 rtnval
= wait (&statval
);
3404 if ((rtnval
) != (PIDGET (inferior_pid
)))
3406 print_sys_errmsg (pi
->pathname
, errno
);
3407 error ("procfs_wait: wait failed, returned %d", rtnval
);
3413 print_sys_errmsg (pi
->pathname
, errno
);
3414 error ("PIOCSTATUS or PIOCWSTOP failed.");
3419 else if (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3421 else if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3425 rtnval
= pi
->prstatus
.pr_pid
;
3426 why
= pi
->prstatus
.pr_lwp
.pr_why
;
3427 what
= pi
->prstatus
.pr_lwp
.pr_what
;
3430 why
= pi
->prstatus
.pr_why
;
3431 what
= pi
->prstatus
.pr_what
;
3437 statval
= (what
<< 8) | 0177;
3443 int found_handler
= 0;
3445 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
3446 if (pi
->syscall_handlers
[i
].syscall_num
== what
)
3449 if (!pi
->syscall_handlers
[i
].func (pi
, what
, why
,
3457 if (why
== PR_SYSENTRY
)
3458 error ("PR_SYSENTRY, unhandled system call %d", what
);
3460 error ("PR_SYSEXIT, unhandled system call %d", what
);
3464 statval
= (SIGSTOP
<< 8) | 0177;
3467 statval
= (what
<< 8) | 0177;
3474 statval
= (SIGTRAP
<< 8) | 0177;
3479 statval
= (SIGTRAP
<< 8) | 0177;
3482 #ifndef FAULTED_USE_SIGINFO
3483 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3484 Solaris fills in si_signo. I'm not sure about others. */
3487 statval
= (SIGILL
<< 8) | 0177;
3491 statval
= (SIGTRAP
<< 8) | 0177;
3496 statval
= (SIGSEGV
<< 8) | 0177;
3501 statval
= (SIGFPE
<< 8) | 0177;
3503 case FLTPAGE
: /* Recoverable page fault */
3504 #endif /* not FAULTED_USE_SIGINFO */
3506 /* Use the signal which the kernel assigns. This is better than
3507 trying to second-guess it from the fault. In fact, I suspect
3508 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3510 statval
= ((pi
->prstatus
.pr_lwp
.pr_info
.si_signo
) << 8) | 0177;
3512 statval
= ((pi
->prstatus
.pr_info
.si_signo
) << 8) | 0177;
3518 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
3520 /* Stop all the other threads when any of them stops. */
3523 struct procinfo
*procinfo
, *next_pi
;
3525 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3527 next_pi
= procinfo
->next
;
3528 if (!procinfo
->had_event
)
3530 #ifdef PROCFS_USE_READ_WRITE
3532 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3534 print_sys_errmsg (procinfo
->pathname
, errno
);
3535 error ("PCSTOP failed");
3538 /* A bug in Solaris (2.5) causes us to hang when trying to
3539 stop a stopped process. So, we have to check first in
3540 order to avoid the hang. */
3541 if (!procfs_read_status (procinfo
))
3543 /* The LWP has apparently terminated. */
3545 printf_filtered ("LWP %d doesn't respond.\n",
3546 (procinfo
->pid
>> 16) & 0xffff);
3547 close_proc_file (procinfo
);
3551 if (!(procinfo
->prstatus
.pr_flags
& PR_STOPPED
))
3552 if (ioctl (procinfo
->ctl_fd
, PIOCSTOP
, &procinfo
->prstatus
)
3555 print_sys_errmsg (procinfo
->pathname
, errno
);
3556 warning ("PIOCSTOP failed");
3565 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3567 pi
->prstatus
.pr_lwp
.pr_flags
);
3569 pi
->prstatus
.pr_flags
);
3573 store_waitstatus (ourstatus
, statval
);
3575 if (rtnval
== -1) /* No more children to wait for */
3577 warning ("Child process unexpectedly missing");
3578 /* Claim it exited with unknown signal. */
3579 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3580 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
3584 pi
->had_event
= 0; /* Indicate that we've seen this one */
3592 set_proc_siginfo - set a process's current signal info
3596 void set_proc_siginfo (struct procinfo *pip, int signo);
3600 Given a pointer to a process info struct in PIP and a signal number
3601 in SIGNO, set the process's current signal and its associated signal
3602 information. The signal will be delivered to the process immediately
3603 after execution is resumed, even if it is being held. In addition,
3604 this particular delivery will not cause another PR_SIGNALLED stop
3605 even if the signal is being traced.
3607 If we are not delivering the same signal that the prstatus siginfo
3608 struct contains information about, then synthesize a siginfo struct
3609 to match the signal we are doing to deliver, make it of the type
3610 "generated by a user process", and send this synthesized copy. When
3611 used to set the inferior's signal state, this will be required if we
3612 are not currently stopped because of a traced signal, or if we decide
3613 to continue with a different signal.
3615 Note that when continuing the inferior from a stop due to receipt
3616 of a traced signal, we either have set PRCSIG to clear the existing
3617 signal, or we have to call this function to do a PIOCSSIG with either
3618 the existing siginfo struct from pr_info, or one we have synthesized
3619 appropriately for the signal we want to deliver. Otherwise if the
3620 signal is still being traced, the inferior will immediately stop
3623 See siginfo(5) for more details.
3627 set_proc_siginfo (pip
, signo
)
3628 struct procinfo
*pip
;
3631 struct siginfo newsiginfo
;
3632 struct siginfo
*sip
;
3633 struct sigi_ctl sictl
;
3635 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3636 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3637 receives a PIOCSSIG with a signal identical to the current signal,
3638 it messes up the current signal. Work around the kernel bug. */
3640 if (signo
== pip
-> prstatus
.pr_lwp
.pr_cursig
)
3642 if (signo
== pip
-> prstatus
.pr_cursig
)
3648 if (signo
== pip
->prstatus
.pr_lwp
.pr_info
.si_signo
)
3650 memcpy ((char *) &sictl
.siginfo
, (char *) &pip
->prstatus
.pr_lwp
.pr_info
,
3651 sizeof (siginfo_t
));
3654 if (signo
== pip
-> prstatus
.pr_info
.si_signo
)
3656 sip
= &pip
-> prstatus
.pr_info
;
3662 siginfo_t
*sip
= &sictl
.siginfo
;
3663 memset ((char *) sip
, 0, sizeof (siginfo_t
));
3665 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
3668 sip
-> si_signo
= signo
;
3670 sip
-> si_errno
= 0;
3671 sip
-> si_pid
= getpid ();
3672 sip
-> si_uid
= getuid ();
3674 #ifdef PROCFS_USE_READ_WRITE
3676 if (write (pip
->ctl_fd
, (char *) &sictl
, sizeof (struct sigi_ctl
)) < 0)
3678 if (ioctl (pip
->ctl_fd
, PIOCSSIG
, sip
) < 0)
3681 print_sys_errmsg (pip
-> pathname
, errno
);
3682 warning ("PIOCSSIG failed");
3686 /* Resume execution of process PID. If STEP is nozero, then
3687 just single step it. If SIGNAL is nonzero, restart it with that
3688 signal activated. */
3691 procfs_resume (pid
, step
, signo
)
3694 enum target_signal signo
;
3697 struct procinfo
*pi
, *procinfo
, *next_pi
;
3698 struct proc_ctl pctl
;
3700 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
3705 pctl
.data
= PRCFAULT
;
3707 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
3711 /* It should not be necessary. If the user explicitly changes the value,
3712 value_assign calls write_register_bytes, which writes it. */
3713 /* It may not be absolutely necessary to specify the PC value for
3714 restarting, but to be safe we use the value that gdb considers
3715 to be current. One case where this might be necessary is if the
3716 user explicitly changes the PC value that gdb considers to be
3717 current. FIXME: Investigate if this is necessary or not. */
3719 #ifdef PRSVADDR_BROKEN
3720 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3721 place to put nPC. In fact, if you use this, nPC seems to be set to some
3722 random garbage. We have to rely on the fact that PC and nPC have been
3723 written previously via PIOCSREG during a register flush. */
3725 pi
->prrun
.pr_vaddr
= (caddr_t
) *(int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
3726 pi
->prrun
.pr_flags
!= PRSVADDR
;
3730 if (signo
== TARGET_SIGNAL_STOP
&& pi
->nopass_next_sigstop
)
3731 /* When attaching to a child process, if we forced it to stop with
3732 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3733 Upon resuming the first time after such a stop, we explicitly
3734 inhibit sending it another SIGSTOP, which would be the normal
3735 result of default signal handling. One potential drawback to
3736 this is that we will also ignore any attempt to by the user
3737 to explicitly continue after the attach with a SIGSTOP. Ultimately
3738 this problem should be dealt with by making the routines that
3739 deal with the inferior a little smarter, and possibly even allow
3740 an inferior to continue running at the same time as gdb. (FIXME?) */
3742 else if (signo
== TARGET_SIGNAL_TSTP
3744 && pi
->prstatus
.pr_lwp
.pr_cursig
== SIGTSTP
3745 && pi
->prstatus
.pr_lwp
.pr_action
.sa_handler
== SIG_DFL
3747 && pi
->prstatus
.pr_cursig
== SIGTSTP
3748 && pi
->prstatus
.pr_action
.sa_handler
== SIG_DFL
3752 /* We are about to pass the inferior a SIGTSTP whose action is
3753 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3754 (notifying the parent via wait()), and then keep going from the
3755 same place when the parent is ready for you to keep going. So
3756 under the debugger, it should do nothing (as if the program had
3757 been stopped and then later resumed. Under ptrace, this
3758 happens for us, but under /proc, the system obligingly stops
3759 the process, and wait_for_inferior would have no way of
3760 distinguishing that type of stop (which indicates that we
3761 should just start it again), with a stop due to the pr_trace
3762 field of the prrun_t struct.
3764 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3765 because the handler needs to get executed. */
3768 signal_to_pass
= target_signal_to_host (signo
);
3772 set_proc_siginfo (pi
, signal_to_pass
);
3777 pctl
.data
|= PRCSIG
;
3779 pi
->prrun
.pr_flags
|= PRCSIG
;
3782 pi
->nopass_next_sigstop
= 0;
3786 pctl
.data
|= PRSTEP
;
3788 pi
->prrun
.pr_flags
|= PRSTEP
;
3792 /* Don't try to start a process unless it's stopped on an
3793 `event of interest'. Doing so will cause errors. */
3795 if (!procfs_read_status (pi
))
3797 /* The LWP has apparently terminated. */
3799 printf_filtered ("LWP %d doesn't respond.\n",
3800 (pi
->pid
>> 16) & 0xffff);
3801 close_proc_file (pi
);
3805 #ifdef PROCFS_USE_READ_WRITE
3806 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
3808 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
3809 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
3812 /* The LWP has apparently terminated. */
3814 printf_filtered ("LWP %d doesn't respond.\n",
3815 (pi
->pid
>> 16) & 0xffff);
3816 close_proc_file (pi
);
3820 /* Continue all the other threads that haven't had an event of interest.
3821 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3822 set by do_attach, and means this is the first resume after an attach.
3823 All threads were CSTOP'd by do_attach, and should be resumed now. */
3826 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3828 next_pi
= procinfo
->next
;
3830 if (!procinfo
->had_event
||
3831 (procinfo
->nopass_next_sigstop
&& signo
== TARGET_SIGNAL_STOP
))
3833 procinfo
->had_event
= procinfo
->nopass_next_sigstop
= 0;
3834 #ifdef PROCFS_USE_READ_WRITE
3835 pctl
.data
= PRCFAULT
| PRCSIG
;
3836 if (write (procinfo
->ctl_fd
, (char *) &pctl
,
3837 sizeof (struct proc_ctl
)) < 0)
3839 if (!procfs_read_status (procinfo
))
3840 fprintf_unfiltered(gdb_stderr
,
3841 "procfs_read_status failed, errno=%d\n",
3843 print_sys_errmsg (procinfo
->pathname
, errno
);
3844 error ("PCRUN failed");
3847 procinfo
->prrun
.pr_flags
&= PRSTEP
;
3848 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
3849 if (!procfs_read_status (procinfo
))
3851 /* The LWP has apparently terminated. */
3853 printf_filtered ("LWP %d doesn't respond.\n",
3854 (procinfo
->pid
>> 16) & 0xffff);
3855 close_proc_file (procinfo
);
3859 /* Don't try to start a process unless it's stopped on an
3860 `event of interest'. Doing so will cause errors. */
3862 if ((procinfo
->prstatus
.pr_flags
& PR_ISTOP
)
3863 && ioctl (procinfo
->ctl_fd
, PIOCRUN
, &procinfo
->prrun
) < 0)
3865 if (!procfs_read_status (procinfo
))
3866 fprintf_unfiltered(gdb_stderr
,
3867 "procfs_read_status failed, errno=%d\n",
3869 print_sys_errmsg (procinfo
->pathname
, errno
);
3870 warning ("PIOCRUN failed");
3874 procfs_read_status (procinfo
);
3882 procfs_fetch_registers -- fetch current registers from inferior
3886 void procfs_fetch_registers (int regno)
3890 Read the current values of the inferior's registers, both the
3891 general register set and floating point registers (if supported)
3892 and update gdb's idea of their current values.
3897 procfs_fetch_registers (regno
)
3900 struct procinfo
*pi
;
3902 pi
= current_procinfo
;
3905 if (procfs_read_status (pi
))
3907 supply_gregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
3908 #if defined (FP0_REGNUM)
3909 supply_fpregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
);
3912 #else /* UNIXWARE */
3913 if (ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
) != -1)
3915 supply_gregset (&pi
->gregset
.gregset
);
3917 #if defined (FP0_REGNUM)
3918 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
) != -1)
3920 supply_fpregset (&pi
->fpregset
.fpregset
);
3923 #endif /* UNIXWARE */
3930 proc_init_failed - called when /proc access initialization fails
3935 static void proc_init_failed (struct procinfo *pi,
3936 char *why, int kill_p)
3940 This function is called whenever initialization of access to a /proc
3941 entry fails. It prints a suitable error message, does some cleanup,
3942 and then invokes the standard error processing routine which dumps
3943 us back into the command loop. If KILL_P is true, sends SIGKILL.
3947 proc_init_failed (pi
, why
, kill_p
)
3948 struct procinfo
*pi
;
3952 print_sys_errmsg (pi
->pathname
, errno
);
3954 kill (pi
->pid
, SIGKILL
);
3955 close_proc_file (pi
);
3964 close_proc_file - close any currently open /proc entry
3968 static void close_proc_file (struct procinfo *pip)
3972 Close any currently open /proc entry and mark the process information
3973 entry as invalid. In order to ensure that we don't try to reuse any
3974 stale information, the pid, fd, and pathnames are explicitly
3975 invalidated, which may be overkill.
3980 close_proc_file (pip
)
3981 struct procinfo
*pip
;
3983 struct procinfo
*procinfo
;
3985 delete_thread (pip
->pid
); /* remove thread from GDB's thread list */
3986 remove_fd (pip
); /* Remove fd from poll/select list */
3988 close (pip
->ctl_fd
);
3989 #ifdef HAVE_MULTIPLE_PROC_FDS
3991 close (pip
->status_fd
);
3992 close (pip
->map_fd
);
3995 free (pip
-> pathname
);
3997 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
3999 if (procinfo_list
== pip
)
4000 procinfo_list
= pip
->next
;
4003 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
4005 if (procinfo
->next
== pip
)
4007 procinfo
->next
= pip
->next
;
4019 open_proc_file - open a /proc entry for a given process id
4023 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4027 Given a process id and a mode, close the existing open /proc
4028 entry (if any) and open one for the new process id, in the
4029 specified mode. Once it is open, then mark the local process
4030 information structure as valid, which guarantees that the pid,
4031 fd, and pathname fields match an open /proc entry. Returns
4032 zero if the open fails, nonzero otherwise.
4034 Note that the pathname is left intact, even when the open fails,
4035 so that callers can use it to construct meaningful error messages
4036 rather than just "file open failed".
4038 Note that for Solaris, the process-id also includes an LWP-id, so we
4039 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4040 then we will ask the kernel what it is and add it to the pid. Hence,
4041 the pid can be changed by us.
4045 open_proc_file (pid
, pip
, mode
, control
)
4047 struct procinfo
*pip
;
4054 pip
-> had_event
= 0;
4055 pip
-> pathname
= xmalloc (MAX_PROC_NAME_SIZE
);
4064 #ifdef HAVE_MULTIPLE_PROC_FDS
4065 sprintf (pip
->pathname
, STATUS_PROC_NAME_FMT
, tmp
);
4066 if ((pip
->status_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4071 sprintf (pip
->pathname
, AS_PROC_NAME_FMT
, tmp
);
4072 if ((pip
->as_fd
= open (pip
->pathname
, O_RDWR
)) < 0)
4074 close (pip
->status_fd
);
4078 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4079 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4081 close (pip
->status_fd
);
4086 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4087 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4089 close (pip
->status_fd
);
4096 sprintf (pip
->pathname
, CTL_PROC_NAME_FMT
, tmp
);
4097 if ((pip
->ctl_fd
= open (pip
->pathname
, O_WRONLY
)) < 0)
4099 close (pip
->status_fd
);
4101 close (pip
->map_fd
);
4106 #else /* HAVE_MULTIPLE_PROC_FDS */
4107 sprintf (pip
-> pathname
, CTL_PROC_NAME_FMT
, tmp
);
4109 if ((tmpfd
= open (pip
-> pathname
, mode
)) < 0)
4113 pip
-> ctl_fd
= tmpfd
;
4114 pip
-> as_fd
= tmpfd
;
4115 pip
-> map_fd
= tmpfd
;
4116 pip
-> status_fd
= tmpfd
;
4118 tmp
= (pid
>> 16) & 0xffff; /* Extract thread id */
4121 { /* Don't know thread id yet */
4122 if (ioctl (tmpfd
, PIOCSTATUS
, &pip
-> prstatus
) < 0)
4124 print_sys_errmsg (pip
-> pathname
, errno
);
4126 error ("open_proc_file: PIOCSTATUS failed");
4129 tmp
= pip
-> prstatus
.pr_who
; /* Get thread id from prstatus_t */
4130 pip
-> pid
= (tmp
<< 16) | pid
; /* Update pip */
4133 if ((pip
-> ctl_fd
= ioctl (tmpfd
, PIOCOPENLWP
, &tmp
)) < 0)
4139 #ifdef PIOCSET /* New method */
4142 pr_flags
= PR_ASYNC
;
4143 ioctl (pip
-> ctl_fd
, PIOCSET
, &pr_flags
);
4147 /* keep extra fds in sync */
4148 pip
->as_fd
= pip
->ctl_fd
;
4149 pip
->map_fd
= pip
->ctl_fd
;
4150 pip
->status_fd
= pip
->ctl_fd
;
4152 close (tmpfd
); /* All done with main pid */
4153 #endif /* PIOCOPENLWP */
4155 #endif /* HAVE_MULTIPLE_PROC_FDS */
4161 mappingflags (flags
)
4164 static char asciiflags
[8];
4166 strcpy (asciiflags
, "-------");
4167 #if defined (MA_PHYS)
4168 if (flags
& MA_PHYS
) asciiflags
[0] = 'd';
4170 if (flags
& MA_STACK
) asciiflags
[1] = 's';
4171 if (flags
& MA_BREAK
) asciiflags
[2] = 'b';
4172 if (flags
& MA_SHARED
) asciiflags
[3] = 's';
4173 if (flags
& MA_READ
) asciiflags
[4] = 'r';
4174 if (flags
& MA_WRITE
) asciiflags
[5] = 'w';
4175 if (flags
& MA_EXEC
) asciiflags
[6] = 'x';
4176 return (asciiflags
);
4180 info_proc_flags (pip
, summary
)
4181 struct procinfo
*pip
;
4184 struct trans
*transp
;
4186 long flags
= pip
->prstatus
.pr_flags
| pip
->prstatus
.pr_lwp
.pr_flags
;
4188 long flags
= pip
->prstatus
.pr_flags
;
4191 printf_filtered ("%-32s", "Process status flags:");
4194 printf_filtered ("\n\n");
4196 for (transp
= pr_flag_table
; transp
-> name
!= NULL
; transp
++)
4198 if (flags
& transp
-> value
)
4202 printf_filtered ("%s ", transp
-> name
);
4206 printf_filtered ("\t%-16s %s.\n", transp
-> name
, transp
-> desc
);
4210 printf_filtered ("\n");
4214 info_proc_stop (pip
, summary
)
4215 struct procinfo
*pip
;
4218 struct trans
*transp
;
4223 why
= pip
-> prstatus
.pr_lwp
.pr_why
;
4224 what
= pip
-> prstatus
.pr_lwp
.pr_what
;
4226 why
= pip
-> prstatus
.pr_why
;
4227 what
= pip
-> prstatus
.pr_what
;
4231 if (pip
-> prstatus
.pr_lwp
.pr_flags
& PR_STOPPED
)
4233 if (pip
-> prstatus
.pr_flags
& PR_STOPPED
)
4236 printf_filtered ("%-32s", "Reason for stopping:");
4239 printf_filtered ("\n\n");
4241 for (transp
= pr_why_table
; transp
-> name
!= NULL
; transp
++)
4243 if (why
== transp
-> value
)
4247 printf_filtered ("%s ", transp
-> name
);
4251 printf_filtered ("\t%-16s %s.\n",
4252 transp
-> name
, transp
-> desc
);
4258 /* Use the pr_why field to determine what the pr_what field means, and
4259 print more information. */
4264 /* pr_what is unused for this case */
4270 printf_filtered ("%s ", signalname (what
));
4274 printf_filtered ("\t%-16s %s.\n", signalname (what
),
4275 safe_strsignal (what
));
4281 printf_filtered ("%s ", syscallname (what
));
4285 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4286 "Entered this system call");
4292 printf_filtered ("%s ", syscallname (what
));
4296 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4297 "Returned from this system call");
4303 printf_filtered ("%s ",
4304 lookupname (faults_table
, what
, "fault"));
4308 printf_filtered ("\t%-16s %s.\n",
4309 lookupname (faults_table
, what
, "fault"),
4310 lookupdesc (faults_table
, what
));
4314 printf_filtered ("\n");
4319 info_proc_siginfo (pip
, summary
)
4320 struct procinfo
*pip
;
4323 struct siginfo
*sip
;
4326 if ((pip
-> prstatus
.pr_lwp
.pr_flags
& PR_STOPPED
) &&
4327 (pip
-> prstatus
.pr_lwp
.pr_why
== PR_SIGNALLED
||
4328 pip
-> prstatus
.pr_lwp
.pr_why
== PR_FAULTED
))
4330 if ((pip
-> prstatus
.pr_flags
& PR_STOPPED
) &&
4331 (pip
-> prstatus
.pr_why
== PR_SIGNALLED
||
4332 pip
-> prstatus
.pr_why
== PR_FAULTED
))
4335 printf_filtered ("%-32s", "Additional signal/fault info:");
4337 sip
= &pip
-> prstatus
.pr_lwp
.pr_info
;
4339 sip
= &pip
-> prstatus
.pr_info
;
4343 printf_filtered ("%s ", signalname (sip
-> si_signo
));
4344 if (sip
-> si_errno
> 0)
4346 printf_filtered ("%s ", errnoname (sip
-> si_errno
));
4348 if (sip
-> si_code
<= 0)
4350 printf_filtered ("sent by %s, uid %d ",
4351 target_pid_to_str (sip
-> si_pid
),
4356 printf_filtered ("%s ", sigcodename (sip
));
4357 if ((sip
-> si_signo
== SIGILL
) ||
4358 (sip
-> si_signo
== SIGFPE
) ||
4359 (sip
-> si_signo
== SIGSEGV
) ||
4360 (sip
-> si_signo
== SIGBUS
))
4362 printf_filtered ("addr=%#lx ",
4363 (unsigned long) sip
-> si_addr
);
4365 else if ((sip
-> si_signo
== SIGCHLD
))
4367 printf_filtered ("child %s, status %u ",
4368 target_pid_to_str (sip
-> si_pid
),
4371 else if ((sip
-> si_signo
== SIGPOLL
))
4373 printf_filtered ("band %u ", sip
-> si_band
);
4379 printf_filtered ("\n\n");
4380 printf_filtered ("\t%-16s %s.\n", signalname (sip
-> si_signo
),
4381 safe_strsignal (sip
-> si_signo
));
4382 if (sip
-> si_errno
> 0)
4384 printf_filtered ("\t%-16s %s.\n",
4385 errnoname (sip
-> si_errno
),
4386 safe_strerror (sip
-> si_errno
));
4388 if (sip
-> si_code
<= 0)
4390 printf_filtered ("\t%-16u %s\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4391 "PID of process sending signal");
4392 printf_filtered ("\t%-16u %s\n", sip
-> si_uid
,
4393 "UID of process sending signal");
4397 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
4399 if ((sip
-> si_signo
== SIGILL
) ||
4400 (sip
-> si_signo
== SIGFPE
))
4402 printf_filtered ("\t%#-16lx %s.\n",
4403 (unsigned long) sip
-> si_addr
,
4404 "Address of faulting instruction");
4406 else if ((sip
-> si_signo
== SIGSEGV
) ||
4407 (sip
-> si_signo
== SIGBUS
))
4409 printf_filtered ("\t%#-16lx %s.\n",
4410 (unsigned long) sip
-> si_addr
,
4411 "Address of faulting memory reference");
4413 else if ((sip
-> si_signo
== SIGCHLD
))
4415 printf_filtered ("\t%-16u %s.\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4416 "Child process ID");
4417 printf_filtered ("\t%-16u %s.\n", sip
-> si_status
,
4418 "Child process exit value or signal");
4420 else if ((sip
-> si_signo
== SIGPOLL
))
4422 printf_filtered ("\t%-16u %s.\n", sip
-> si_band
,
4423 "Band event for POLL_{IN,OUT,MSG}");
4427 printf_filtered ("\n");
4432 info_proc_syscalls (pip
, summary
)
4433 struct procinfo
*pip
;
4441 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4442 if (pip
-> prstatus
.pr_flags
& PR_ASLEEP
)
4444 int syscallnum
= pip
-> prstatus
.pr_reg
[R_D0
];
4447 printf_filtered ("%-32s", "Sleeping in system call:");
4448 printf_filtered ("%s", syscallname (syscallnum
));
4452 printf_filtered ("Sleeping in system call '%s'.\n",
4453 syscallname (syscallnum
));
4459 if (ioctl (pip
-> ctl_fd
, PIOCGENTRY
, &pip
-> entryset
) < 0)
4461 print_sys_errmsg (pip
-> pathname
, errno
);
4462 error ("PIOCGENTRY failed");
4465 if (ioctl (pip
-> ctl_fd
, PIOCGEXIT
, &pip
-> exitset
) < 0)
4467 print_sys_errmsg (pip
-> pathname
, errno
);
4468 error ("PIOCGEXIT failed");
4472 printf_filtered ("System call tracing information:\n\n");
4474 printf_filtered ("\t%-12s %-8s %-8s\n",
4478 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
4481 if (syscall_table
[syscallnum
] != NULL
)
4482 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
4484 printf_filtered ("\t%-12d ", syscallnum
);
4487 printf_filtered ("%-8s ",
4488 prismember (&pip
->prstatus
.pr_sysentry
, syscallnum
)
4490 printf_filtered ("%-8s ",
4491 prismember (&pip
->prstatus
.pr_sysexit
, syscallnum
)
4494 printf_filtered ("%-8s ",
4495 prismember (&pip
-> entryset
, syscallnum
)
4497 printf_filtered ("%-8s ",
4498 prismember (&pip
-> exitset
, syscallnum
)
4501 printf_filtered ("\n");
4503 printf_filtered ("\n");
4512 static char locbuf
[32];
4514 name
= strsigno (signo
);
4517 sprintf (locbuf
, "Signal %d", signo
);
4521 sprintf (locbuf
, "%s (%d)", name
, signo
);
4531 static char locbuf
[32];
4533 name
= strerrno (errnum
);
4536 sprintf (locbuf
, "Errno %d", errnum
);
4540 sprintf (locbuf
, "%s (%d)", name
, errnum
);
4546 info_proc_signals (pip
, summary
)
4547 struct procinfo
*pip
;
4554 #ifndef PROCFS_USE_READ_WRITE
4555 if (ioctl (pip
-> ctl_fd
, PIOCGTRACE
, &pip
-> trace
) < 0)
4557 print_sys_errmsg (pip
-> pathname
, errno
);
4558 error ("PIOCGTRACE failed");
4562 printf_filtered ("Disposition of signals:\n\n");
4563 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4564 "Signal", "Trace", "Hold", "Pending", "Description");
4565 for (signo
= 0; signo
< NSIG
; signo
++)
4568 printf_filtered ("\t%-15s ", signalname (signo
));
4570 printf_filtered ("%-8s ",
4571 prismember (&pip
-> prstatus
.pr_sigtrace
, signo
)
4573 printf_filtered ("%-8s ",
4574 prismember (&pip
-> prstatus
.pr_lwp
.pr_context
.uc_sigmask
, signo
)
4577 printf_filtered ("%-8s ",
4578 prismember (&pip
-> trace
, signo
)
4580 printf_filtered ("%-8s ",
4581 prismember (&pip
-> prstatus
.pr_sighold
, signo
)
4586 if (prismember (&pip
->prstatus
.pr_sigpend
, signo
) ||
4587 prismember (&pip
->prstatus
.pr_lwp
.pr_lwppend
, signo
))
4588 printf_filtered("%-8s ", "yes");
4590 printf_filtered("%-8s ", "no");
4591 #else /* UNIXWARE */
4592 #ifdef PROCFS_SIGPEND_OFFSET
4593 /* Alpha OSF/1 numbers the pending signals from 1. */
4594 printf_filtered ("%-8s ",
4595 (signo
? prismember (&pip
-> prstatus
.pr_sigpend
,
4600 printf_filtered ("%-8s ",
4601 prismember (&pip
-> prstatus
.pr_sigpend
, signo
)
4604 #endif /* UNIXWARE */
4605 printf_filtered (" %s\n", safe_strsignal (signo
));
4607 printf_filtered ("\n");
4612 info_proc_faults (pip
, summary
)
4613 struct procinfo
*pip
;
4616 struct trans
*transp
;
4621 if (ioctl (pip
-> ctl_fd
, PIOCGFAULT
, &pip
->fltset
.fltset
) < 0)
4623 print_sys_errmsg (pip
-> pathname
, errno
);
4624 error ("PIOCGFAULT failed");
4628 printf_filtered ("Current traced hardware fault set:\n\n");
4629 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4631 for (transp
= faults_table
; transp
-> name
!= NULL
; transp
++)
4634 printf_filtered ("\t%-12s ", transp
-> name
);
4636 printf_filtered ("%-8s", prismember (&pip
->prstatus
.pr_flttrace
, transp
-> value
)
4639 printf_filtered ("%-8s", prismember (&pip
->fltset
.fltset
, transp
-> value
)
4642 printf_filtered ("\n");
4644 printf_filtered ("\n");
4649 info_proc_mappings (pip
, summary
)
4650 struct procinfo
*pip
;
4654 struct prmap
*prmaps
;
4655 struct prmap
*prmap
;
4660 printf_filtered ("Mapped address spaces:\n\n");
4661 #ifdef BFD_HOST_64_BIT
4662 printf_filtered (" %18s %18s %10s %10s %7s\n",
4664 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4671 #ifdef PROCFS_USE_READ_WRITE
4672 if (fstat (pip
->map_fd
, &sbuf
) == 0)
4674 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
4675 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4676 if ((lseek (pip
->map_fd
, 0, SEEK_SET
) == 0) &&
4677 (read (pip
->map_fd
, (char *) prmaps
,
4678 nmap
* sizeof (*prmaps
)) == (nmap
* sizeof (*prmaps
))))
4681 for (prmap
= prmaps
; i
< nmap
; ++prmap
, ++i
)
4683 if (ioctl (pip
-> ctl_fd
, PIOCNMAP
, &nmap
) == 0)
4685 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4686 if (ioctl (pip
-> ctl_fd
, PIOCMAP
, prmaps
) == 0)
4688 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
4689 #endif /* PROCFS_USE_READ_WRITE */
4691 #ifdef BFD_HOST_64_BIT
4692 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4694 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4696 (unsigned long)prmap
-> pr_vaddr
,
4697 (unsigned long)prmap
-> pr_vaddr
4698 + prmap
-> pr_size
- 1,
4701 mappingflags (prmap
-> pr_mflags
));
4705 printf_filtered ("\n");
4713 info_proc -- implement the "info proc" command
4717 void info_proc (char *args, int from_tty)
4721 Implement gdb's "info proc" command by using the /proc interface
4722 to print status information about any currently running process.
4724 Examples of the use of "info proc" are:
4726 info proc (prints summary info for current inferior)
4727 info proc 123 (prints summary info for process with pid 123)
4728 info proc mappings (prints address mappings)
4729 info proc times (prints process/children times)
4730 info proc id (prints pid, ppid, gid, sid, etc)
4731 FIXME: i proc id not implemented.
4732 info proc status (prints general process state info)
4733 FIXME: i proc status not implemented.
4734 info proc signals (prints info about signal handling)
4735 info proc all (prints all info)
4740 info_proc (args
, from_tty
)
4745 struct procinfo
*pip
;
4746 struct cleanup
*old_chain
;
4762 old_chain
= make_cleanup (null_cleanup
, 0);
4764 /* Default to using the current inferior if no pid specified. Note
4765 that inferior_pid may be 0, hence we set okerr. */
4767 pid
= inferior_pid
& 0x7fffffff; /* strip off sol-thread bit */
4768 if (!(pip
= find_procinfo (pid
, 1))) /* inferior_pid no good? */
4769 pip
= procinfo_list
; /* take first available */
4770 pid
= pid
& 0xffff; /* extract "real" pid */
4774 if ((argv
= buildargv (args
)) == NULL
)
4778 make_cleanup (freeargv
, (char *) argv
);
4780 while (*argv
!= NULL
)
4782 argsize
= strlen (*argv
);
4783 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
4788 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
4793 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
4798 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
4803 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
4808 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
4813 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
4818 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
4823 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
4828 else if ((pid
= atoi (*argv
)) > 0)
4830 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4831 memset (pip
, 0, sizeof (*pip
));
4834 if (!open_proc_file (pid
, pip
, O_RDONLY
, 0))
4836 perror_with_name (pip
-> pathname
);
4840 make_cleanup (close_proc_file
, pip
);
4842 else if (**argv
!= '\000')
4844 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
4850 /* If we don't have a valid open process at this point, then we have no
4851 inferior or didn't specify a specific pid. */
4856 No process. Start debugging a program or specify an explicit process ID.");
4859 if (!procfs_read_status (pip
))
4861 print_sys_errmsg (pip
-> pathname
, errno
);
4862 error ("procfs_read_status failed");
4865 #ifndef PROCFS_USE_READ_WRITE
4867 nlwp
= pip
->prstatus
.pr_nlwp
;
4868 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (*lwps
));
4870 if (ioctl (pip
->ctl_fd
, PIOCLWPIDS
, lwps
))
4872 print_sys_errmsg (pip
-> pathname
, errno
);
4873 error ("PIOCLWPIDS failed");
4875 #else /* PIOCLWPIDS */
4877 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
4879 #endif /* PIOCLWPIDS */
4881 for (; nlwp
> 0; nlwp
--, lwps
++)
4883 pip
= find_procinfo ((*lwps
<< 16) | pid
, 1);
4887 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4888 memset (pip
, 0, sizeof (*pip
));
4889 if (!open_proc_file ((*lwps
<< 16) | pid
, pip
, O_RDONLY
, 0))
4892 make_cleanup (close_proc_file
, pip
);
4894 if (!procfs_read_status (pip
))
4896 print_sys_errmsg (pip
-> pathname
, errno
);
4897 error ("procfs_read_status failed");
4901 #endif /* PROCFS_USE_READ_WRITE */
4903 /* Print verbose information of the requested type(s), or just a summary
4904 of the information for all types. */
4906 printf_filtered ("\nInformation for %s.%d:\n\n", pip
-> pathname
, *lwps
);
4907 if (summary
|| all
|| flags
)
4909 info_proc_flags (pip
, summary
);
4913 info_proc_stop (pip
, summary
);
4915 supply_gregset (&pip
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
4917 supply_gregset (&pip
->prstatus
.pr_reg
);
4919 printf_filtered ("PC: ");
4920 print_address (read_pc (), gdb_stdout
);
4921 printf_filtered ("\n");
4923 if (summary
|| all
|| signals
|| faults
)
4925 info_proc_siginfo (pip
, summary
);
4927 if (summary
|| all
|| syscalls
)
4929 info_proc_syscalls (pip
, summary
);
4931 if (summary
|| all
|| mappings
)
4933 info_proc_mappings (pip
, summary
);
4935 if (summary
|| all
|| signals
)
4937 info_proc_signals (pip
, summary
);
4939 if (summary
|| all
|| faults
)
4941 info_proc_faults (pip
, summary
);
4943 printf_filtered ("\n");
4945 /* All done, deal with closing any temporary process info structure,
4946 freeing temporary memory , etc. */
4948 do_cleanups (old_chain
);
4949 #ifndef PROCFS_USE_READ_WRITE
4958 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
4962 void modify_inherit_on_fork_flag (fd, flag)
4966 Call this routine to modify the inherit-on-fork flag. This routine is
4967 just a nice wrapper to hide the #ifdefs needed by various systems to
4973 modify_inherit_on_fork_flag (fd
, flag
)
4977 #if defined (PIOCSET) || defined (PCSET)
4981 struct proc_ctl pctl
;
4983 #if defined (PIOCSET) || defined (PCSET) /* New method */
4987 #ifdef PROCFS_USE_READ_WRITE
4989 pctl
.data
= PR_FORK
;
4990 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
4993 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
4998 #ifdef PROCFS_USE_READ_WRITE
5000 pctl
.data
= PR_FORK
;
5001 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5004 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5009 #ifdef PIOCSFORK /* Original method */
5012 retval
= ioctl (fd
, PIOCSFORK
, NULL
);
5016 retval
= ioctl (fd
, PIOCRFORK
, NULL
);
5019 Neither PR_FORK nor PIOCSFORK exist
!!!
5026 print_sys_errmsg ("modify_inherit_on_fork_flag", errno
);
5027 error ("PIOCSFORK or PR_FORK modification failed");
5034 modify_run_on_last_close_flag - Change the run-on-last-close flag
5038 void modify_run_on_last_close_flag (fd, flag)
5042 Call this routine to modify the run-on-last-close flag. This routine
5043 is just a nice wrapper to hide the #ifdefs needed by various systems to
5049 modify_run_on_last_close_flag (fd
, flag
)
5053 #if defined (PIOCSET) || defined (PCSET)
5057 struct proc_ctl pctl
;
5059 #if defined (PIOCSET) || defined (PCSET) /* New method */
5063 #ifdef PROCFS_USE_READ_WRITE
5066 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5069 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5074 #ifdef PROCFS_USE_READ_WRITE
5077 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5080 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5085 #ifdef PIOCSRLC /* Original method */
5087 retval
= ioctl (fd
, PIOCSRLC
, NULL
);
5089 retval
= ioctl (fd
, PIOCRRLC
, NULL
);
5091 Neither PR_RLC nor PIOCSRLC exist
!!!
5098 print_sys_errmsg ("modify_run_on_last_close_flag", errno
);
5099 error ("PIOCSRLC or PR_RLC modification failed");
5106 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5110 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5114 This function function disables traps for the specified system call.
5115 errok is non-zero if errors should be ignored.
5119 procfs_clear_syscall_trap (pi
, syscall_num
, errok
)
5120 struct procinfo
*pi
;
5128 goterr
= ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0;
5130 if (goterr
&& !errok
)
5132 print_sys_errmsg (pi
->pathname
, errno
);
5133 error ("PIOCGENTRY failed");
5138 prdelset (&sysset
, syscall_num
);
5140 if ((ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0) && !errok
)
5142 print_sys_errmsg (pi
->pathname
, errno
);
5143 error ("PIOCSENTRY failed");
5147 goterr
= ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0;
5149 if (goterr
&& !errok
)
5151 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5152 print_sys_errmsg (pi
->pathname
, errno
);
5153 error ("PIOCGEXIT failed");
5158 praddset (&sysset
, syscall_num
);
5160 if ((ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0) && !errok
)
5162 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5163 print_sys_errmsg (pi
->pathname
, errno
);
5164 error ("PIOCSEXIT failed");
5169 if (!pi
->syscall_handlers
)
5172 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5176 /* Remove handler func from the handler list */
5178 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5179 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5181 if (i
+ 1 != pi
->num_syscall_handlers
)
5182 { /* Not the last entry.
5183 Move subsequent entries fwd. */
5184 memcpy (&pi
->syscall_handlers
[i
], &pi
->syscall_handlers
[i
+ 1],
5185 (pi
->num_syscall_handlers
- i
- 1)
5186 * sizeof (struct procfs_syscall_handler
));
5189 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
,
5190 (pi
->num_syscall_handlers
- 1)
5191 * sizeof (struct procfs_syscall_handler
));
5192 pi
->num_syscall_handlers
--;
5197 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5205 procfs_set_syscall_trap -- arrange for a function to be called when the
5206 child executes the specified system call.
5210 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5211 syscall_func_t *function)
5215 This function sets up an entry and/or exit trap for the specified system
5216 call. When the child executes the specified system call, your function
5217 will be called with the call #, a flag that indicates entry or exit, and
5218 pointers to rtnval and statval (which are used by procfs_wait). The
5219 function should return non-zero if something interesting happened, zero
5224 procfs_set_syscall_trap (pi
, syscall_num
, flags
, func
)
5225 struct procinfo
*pi
;
5228 syscall_func_t
*func
;
5233 if (flags
& PROCFS_SYSCALL_ENTRY
)
5235 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0)
5237 print_sys_errmsg (pi
->pathname
, errno
);
5238 error ("PIOCGENTRY failed");
5241 praddset (&sysset
, syscall_num
);
5243 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0)
5245 print_sys_errmsg (pi
->pathname
, errno
);
5246 error ("PIOCSENTRY failed");
5250 if (flags
& PROCFS_SYSCALL_EXIT
)
5252 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0)
5254 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5255 print_sys_errmsg (pi
->pathname
, errno
);
5256 error ("PIOCGEXIT failed");
5259 praddset (&sysset
, syscall_num
);
5261 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0)
5263 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5264 print_sys_errmsg (pi
->pathname
, errno
);
5265 error ("PIOCSEXIT failed");
5270 if (!pi
->syscall_handlers
)
5272 pi
->syscall_handlers
= xmalloc (sizeof (struct procfs_syscall_handler
));
5273 pi
->syscall_handlers
[0].syscall_num
= syscall_num
;
5274 pi
->syscall_handlers
[0].func
= func
;
5275 pi
->num_syscall_handlers
= 1;
5281 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5282 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5284 pi
->syscall_handlers
[i
].func
= func
;
5288 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
, (i
+ 1)
5289 * sizeof (struct procfs_syscall_handler
));
5290 pi
->syscall_handlers
[i
].syscall_num
= syscall_num
;
5291 pi
->syscall_handlers
[i
].func
= func
;
5292 pi
->num_syscall_handlers
++;
5296 #ifdef SYS_lwp_create
5302 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5306 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5310 This routine is called both when an inferior process and it's new lwp
5311 are about to finish a _lwp_create() system call. This is the system
5312 call that Solaris uses to create a lightweight process. When the
5313 target process gets this event, we can look at sysarg[2] to find the
5314 new childs lwp ID, and create a procinfo struct from that. After that,
5315 we pretend that we got a SIGTRAP, and return non-zero to tell
5316 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5317 sees the new process and continues it.
5319 When we see the child exiting from lwp_create, we just contine it,
5320 since everything was handled when the parent trapped.
5323 In effect, we are only paying attention to the parent's completion of
5324 the lwp_create syscall. If we only paid attention to the child
5325 instead, then we wouldn't detect the creation of a suspended thread.
5329 procfs_lwp_creation_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
5330 struct procinfo
*pi
;
5337 struct procinfo
*childpi
;
5338 struct proc_ctl pctl
;
5340 /* We've just detected the completion of an lwp_create system call. Now we
5341 need to setup a procinfo struct for this thread, and notify the thread
5342 system of the new arrival. */
5344 /* If lwp_create failed, then nothing interesting happened. Continue the
5345 process and go back to sleep. */
5348 /* Joel ... can you check this logic out please? JKJ */
5349 if (pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
[R_EFL
] & 1)
5350 { /* _lwp_create failed */
5352 pctl
.data
= PRCFAULT
;
5354 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5355 perror_with_name (pi
->pathname
);
5359 #else /* UNIXWARE */
5360 if (PROCFS_GET_CARRY (pi
->prstatus
.pr_reg
))
5361 { /* _lwp_create failed */
5362 pi
->prrun
.pr_flags
&= PRSTEP
;
5363 pi
->prrun
.pr_flags
|= PRCFAULT
;
5365 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5366 perror_with_name (pi
->pathname
);
5372 /* At this point, the new thread is stopped at it's first instruction, and
5373 the parent is stopped at the exit from lwp_create. */
5375 if (pi
->new_child
) /* Child? */
5376 { /* Yes, just continue it */
5379 pctl
.data
= PRCFAULT
;
5381 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5382 #else /* !UNIXWARE */
5383 pi
->prrun
.pr_flags
&= PRSTEP
;
5384 pi
->prrun
.pr_flags
|= PRCFAULT
;
5386 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
5387 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5388 #endif /* !UNIXWARE */
5389 perror_with_name (pi
->pathname
);
5391 pi
->new_child
= 0; /* No longer new */
5396 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5397 in the child and continue the parent. */
5399 /* Third arg is pointer to new thread id. */
5401 lwp_id
= read_memory_integer (pi
->prstatus
.pr_lwp
.pr_sysarg
[2], sizeof (int));
5403 lwp_id
= read_memory_integer (pi
->prstatus
.pr_sysarg
[2], sizeof (int));
5406 lwp_id
= (lwp_id
<< 16) | PIDGET (pi
->pid
);
5408 childpi
= create_procinfo (lwp_id
);
5410 /* The new process has actually inherited the lwp_create syscall trap from
5411 it's parent, but we still have to call this to register handlers for
5414 procfs_set_inferior_syscall_traps (childpi
);
5415 add_thread (lwp_id
);
5416 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id
));
5418 /* Continue the parent */
5421 pctl
.data
= PRCFAULT
;
5423 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5425 pi
->prrun
.pr_flags
&= PRSTEP
;
5426 pi
->prrun
.pr_flags
|= PRCFAULT
;
5427 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5429 perror_with_name (pi
->pathname
);
5431 /* The new child may have been created in one of two states:
5432 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5433 If suspended, we flag it to be continued later, when it has an event. */
5436 if (childpi
->prstatus
.pr_lwp
.pr_why
== PR_SUSPENDED
)
5438 if (childpi
->prstatus
.pr_why
== PR_SUSPENDED
)
5440 childpi
->new_child
= 1; /* Flag this as an unseen child process */
5443 /* Continue the child */
5446 pctl
.data
= PRCFAULT
;
5448 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5450 childpi
->prrun
.pr_flags
&= PRSTEP
;
5451 childpi
->prrun
.pr_flags
|= PRCFAULT
;
5453 if (ioctl (childpi
->ctl_fd
, PIOCRUN
, &childpi
->prrun
) != 0)
5455 perror_with_name (childpi
->pathname
);
5459 #endif /* SYS_lwp_create */
5461 /* Fork an inferior process, and start debugging it with /proc. */
5464 procfs_create_inferior (exec_file
, allargs
, env
)
5469 char *shell_file
= getenv ("SHELL");
5471 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
5474 /* We will be looking down the PATH to find shell_file. If we
5475 just do this the normal way (via execlp, which operates by
5476 attempting an exec for each element of the PATH until it
5477 finds one which succeeds), then there will be an exec for
5478 each failed attempt, each of which will cause a PR_SYSEXIT
5479 stop, and we won't know how to distinguish the PR_SYSEXIT's
5480 for these failed execs with the ones for successful execs
5481 (whether the exec has succeeded is stored at that time in the
5482 carry bit or some such architecture-specific and
5483 non-ABI-specified place).
5485 So I can't think of anything better than to search the PATH
5486 now. This has several disadvantages: (1) There is a race
5487 condition; if we find a file now and it is deleted before we
5488 exec it, we lose, even if the deletion leaves a valid file
5489 further down in the PATH, (2) there is no way to know exactly
5490 what an executable (in the sense of "capable of being
5491 exec'd") file is. Using access() loses because it may lose
5492 if the caller is the superuser; failing to use it loses if
5493 there are ACLs or some such. */
5497 /* FIXME-maybe: might want "set path" command so user can change what
5498 path is used from within GDB. */
5499 char *path
= getenv ("PATH");
5501 struct stat statbuf
;
5504 path
= "/bin:/usr/bin";
5506 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
5507 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1: NULL
)
5509 p1
= strchr (p
, ':');
5514 strncpy (tryname
, p
, len
);
5515 tryname
[len
] = '\0';
5516 strcat (tryname
, "/");
5517 strcat (tryname
, shell_file
);
5518 if (access (tryname
, X_OK
) < 0)
5520 if (stat (tryname
, &statbuf
) < 0)
5522 if (!S_ISREG (statbuf
.st_mode
))
5523 /* We certainly need to reject directories. I'm not quite
5524 as sure about FIFOs, sockets, etc., but I kind of doubt
5525 that people want to exec() these things. */
5530 /* Not found. This must be an error rather than merely passing
5531 the file to execlp(), because execlp() would try all the
5532 exec()s, causing GDB to get confused. */
5533 error ("Can't find shell %s in PATH", shell_file
);
5535 shell_file
= tryname
;
5538 fork_inferior (exec_file
, allargs
, env
,
5539 proc_set_exec_trap
, procfs_init_inferior
, shell_file
);
5541 /* We are at the first instruction we care about. */
5542 /* Pedal to the metal... */
5544 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
5547 /* Clean up after the inferior dies. */
5550 procfs_mourn_inferior ()
5552 struct procinfo
*pi
;
5553 struct procinfo
*next_pi
;
5555 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5558 unconditionally_kill_inferior (pi
);
5561 unpush_target (&procfs_ops
);
5562 generic_mourn_inferior ();
5566 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5570 /* This variable is controlled by modules that sit atop procfs that may layer
5571 their own process structure atop that provided here. sol-thread.c does
5572 this because of the Solaris two-level thread model. */
5574 return !procfs_suppress_run
;
5576 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5579 /* Insert a watchpoint */
5581 procfs_set_watchpoint(pid
, addr
, len
, rw
)
5587 struct procinfo
*pi
;
5590 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5591 wpt
.pr_vaddr
= (caddr_t
)addr
;
5593 wpt
.pr_wflags
= ((rw
& 1) ? MA_READ
: 0) | ((rw
& 2) ? MA_WRITE
: 0);
5594 if (ioctl (pi
->ctl_fd
, PIOCSWATCH
, &wpt
) < 0)
5598 /* Currently it sometimes happens that the same watchpoint gets
5599 deleted twice - don't die in this case (FIXME please) */
5600 if (errno
== ESRCH
&& len
== 0)
5602 print_sys_errmsg (pi
->pathname
, errno
);
5603 error ("PIOCSWATCH failed");
5609 procfs_stopped_by_watchpoint(pid
)
5612 struct procinfo
*pi
;
5616 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5617 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
5619 why
= pi
->prstatus
.pr_why
;
5620 what
= pi
->prstatus
.pr_what
;
5621 if (why
== PR_FAULTED
5622 #if defined (FLTWATCH) && defined (FLTKWATCH)
5623 && (what
== FLTWATCH
|| what
== FLTKWATCH
)
5626 && (what
== FLTWATCH
)
5629 && (what
== FLTKWATCH
)
5637 #endif /* !UNIXWARE */
5638 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5640 /* Why is this necessary? Shouldn't dead threads just be removed from the
5644 procfs_thread_alive (pid
)
5647 struct procinfo
*pi
, *next_pi
;
5649 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5652 if (pi
-> pid
== pid
)
5653 if (procfs_read_status (pi
)) /* alive */
5655 else /* defunct (exited) */
5657 close_proc_file (pi
);
5665 procfs_first_available ()
5667 struct procinfo
*pi
;
5669 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
5671 if (procfs_read_status (pi
))
5678 procfs_get_pid_fd (pid
)
5681 struct procinfo
*pi
= find_procinfo (pid
, 1);
5689 /* Send a SIGINT to the process group. This acts just like the user typed a
5690 ^C on the controlling terminal.
5692 XXX - This may not be correct for all systems. Some may want to use
5693 killpg() instead of kill (-pgrp). */
5698 extern pid_t inferior_process_group
;
5700 kill (-inferior_process_group
, SIGINT
);
5703 /* Convert a pid to printable form. */
5707 procfs_pid_to_str (pid
)
5710 static char buf
[100];
5712 sprintf (buf
, "Kernel thread %d", TIDGET (pid
));
5718 struct target_ops procfs_ops
= {
5719 "procfs", /* to_shortname */
5720 "Unix /proc child process", /* to_longname */
5721 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
5722 procfs_open
, /* to_open */
5724 procfs_attach
, /* to_attach */
5725 procfs_detach
, /* to_detach */
5726 procfs_resume
, /* to_resume */
5727 procfs_wait
, /* to_wait */
5728 procfs_fetch_registers
, /* to_fetch_registers */
5729 procfs_store_registers
, /* to_store_registers */
5730 procfs_prepare_to_store
, /* to_prepare_to_store */
5731 procfs_xfer_memory
, /* to_xfer_memory */
5732 procfs_files_info
, /* to_files_info */
5733 memory_insert_breakpoint
, /* to_insert_breakpoint */
5734 memory_remove_breakpoint
, /* to_remove_breakpoint */
5735 terminal_init_inferior
, /* to_terminal_init */
5736 terminal_inferior
, /* to_terminal_inferior */
5737 terminal_ours_for_output
, /* to_terminal_ours_for_output */
5738 terminal_ours
, /* to_terminal_ours */
5739 child_terminal_info
, /* to_terminal_info */
5740 procfs_kill_inferior
, /* to_kill */
5742 0, /* to_lookup_symbol */
5743 procfs_create_inferior
, /* to_create_inferior */
5744 procfs_mourn_inferior
, /* to_mourn_inferior */
5745 procfs_can_run
, /* to_can_run */
5746 procfs_notice_signals
, /* to_notice_signals */
5747 procfs_thread_alive
, /* to_thread_alive */
5748 procfs_stop
, /* to_stop */
5749 process_stratum
, /* to_stratum */
5751 1, /* to_has_all_memory */
5752 1, /* to_has_memory */
5753 1, /* to_has_stack */
5754 1, /* to_has_registers */
5755 1, /* to_has_execution */
5757 0, /* sections_end */
5758 OPS_MAGIC
/* to_magic */
5762 _initialize_procfs ()
5764 #ifdef HAVE_OPTIONAL_PROC_FS
5765 char procname
[MAX_PROC_NAME_SIZE
];
5768 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5769 don't add procfs support if we cannot access the running
5771 sprintf (procname
, STATUS_PROC_NAME_FMT
, getpid ());
5772 if ((fd
= open (procname
, O_RDONLY
)) < 0)
5777 add_target (&procfs_ops
);
5779 add_info ("processes", info_proc
,
5780 "Show process status information using /proc entry.\n\
5781 Specify process id or use current inferior by default.\n\
5782 Specify keywords for detailed information; default is summary.\n\
5783 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5784 `status', `syscalls', and `times'.\n\
5785 Unambiguous abbreviations may be used.");
5787 init_syscall_table ();