1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992-96, 1997 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs
4 compatibility by Geoffrey Noer at Cygnus Solutions.
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 /* the name of the proc status struct depends on the implementation */
59 typedef pstatus_t gdb_prstatus_t
;
61 typedef prstatus_t gdb_prstatus_t
;
64 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
66 /* proc name formats may vary depending on the proc implementation */
67 #ifdef HAVE_MULTIPLE_PROC_FDS
68 # ifndef CTL_PROC_NAME_FMT
69 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
70 # define AS_PROC_NAME_FMT "/proc/%d/as"
71 # define MAP_PROC_NAME_FMT "/proc/%d/map"
72 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
74 #else /* HAVE_MULTIPLE_PROC_FDS */
75 # ifndef CTL_PROC_NAME_FMT
76 # define CTL_PROC_NAME_FMT "/proc/%05d"
77 # define AS_PROC_NAME_FMT "/proc/%05d"
78 # define MAP_PROC_NAME_FMT "/proc/%05d"
79 # define STATUS_PROC_NAME_FMT "/proc/%05d"
81 #endif /* HAVE_MULTIPLE_PROC_FDS */
83 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
85 extern struct target_ops procfs_ops
; /* Forward declaration */
87 int procfs_suppress_run
= 0; /* Non-zero if procfs should pretend not to
88 be a runnable target. Used by targets
89 that can sit atop procfs, such as solaris
92 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
93 CORE_ADDR kernel_u_addr
;
96 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
98 #define si_pid _data._proc.pid
100 #define si_uid _data._proc._pdata._kill.uid
101 #endif /* BROKEN_SIGINFO_H */
103 /* Define structures for passing commands to /proc/pid/ctl file. Note that
104 while we create these for the PROCFS_USE_READ_WRITE world, we use them
105 and ignore the extra cmd int in other proc schemes.
107 /* generic ctl msg */
113 /* set general registers */
119 /* set fp registers */
125 /* set signals to be traced */
131 /* set faults to be traced */
137 /* set system calls to be traced */
143 /* set current signal to be traced */
149 /* All access to the inferior, either one started by gdb or one that has
150 been attached to, is controlled by an instance of a procinfo structure,
151 defined below. Since gdb currently only handles one inferior at a time,
152 the procinfo structure for the inferior is statically allocated and
153 only one exists at any given time. There is a separate procinfo
154 structure for use by the "info proc" command, so that we can print
155 useful information about any random process without interfering with
156 the inferior's procinfo information. */
159 struct procinfo
*next
;
160 int pid
; /* Process ID of inferior */
161 int ctl_fd
; /* File descriptor for /proc ctl file */
162 int status_fd
; /* File descriptor for /proc status file */
163 int as_fd
; /* File descriptor for /proc as file */
164 int map_fd
; /* File descriptor for /proc map file */
165 char *pathname
; /* Pathname to /proc entry */
166 int had_event
; /* poll/select says something happened */
167 int was_stopped
; /* Nonzero if was stopped prior to attach */
168 int nopass_next_sigstop
; /* Don't pass a sigstop on next resume */
169 #ifndef HAVE_NO_PRRUN_T
170 prrun_t prrun
; /* Control state when it is run */
172 gdb_prstatus_t prstatus
; /* Current process status info */
173 struct greg_ctl gregset
; /* General register set */
174 struct fpreg_ctl fpregset
; /* Floating point register set */
175 struct flt_ctl fltset
; /* Current traced hardware fault set */
176 struct sig_ctl trace
; /* Current traced signal set */
177 struct sys_ctl exitset
; /* Current traced system call exit set */
178 struct sys_ctl entryset
; /* Current traced system call entry set */
179 struct sig_ctl saved_sighold
; /* Saved held signal set */
180 struct flt_ctl saved_fltset
; /* Saved traced hardware fault set */
181 struct sig_ctl saved_trace
; /* Saved traced signal set */
182 struct sys_ctl saved_exitset
; /* Saved traced system call exit set */
183 struct sys_ctl saved_entryset
;/* Saved traced system call entry set */
184 int num_syscall_handlers
; /* Number of syscall handlers currently installed */
185 struct procfs_syscall_handler
*syscall_handlers
; /* Pointer to list of syscall trap handlers */
186 int new_child
; /* Non-zero if it's a new thread */
189 /* List of inferior process information */
190 static struct procinfo
*procinfo_list
= NULL
;
192 static struct pollfd
*poll_list
; /* pollfds used for waiting on /proc */
194 static int num_poll_list
= 0; /* Number of entries in poll_list */
196 /* Much of the information used in the /proc interface, particularly for
197 printing status information, is kept as tables of structures of the
198 following form. These tables can be used to map numeric values to
199 their symbolic names and to a string that describes their specific use. */
202 int value
; /* The numeric value */
203 char *name
; /* The equivalent symbolic value */
204 char *desc
; /* Short description of value */
207 /* Translate bits in the pr_flags member of the prstatus structure, into the
208 names and desc information. */
210 static struct trans pr_flag_table
[] =
212 #if defined (PR_STOPPED)
213 { PR_STOPPED
, "PR_STOPPED", "Process is stopped" },
215 #if defined (PR_ISTOP)
216 { PR_ISTOP
, "PR_ISTOP", "Stopped on an event of interest" },
218 #if defined (PR_DSTOP)
219 { PR_DSTOP
, "PR_DSTOP", "A stop directive is in effect" },
221 #if defined (PR_ASLEEP)
222 { PR_ASLEEP
, "PR_ASLEEP", "Sleeping in an interruptible system call" },
224 #if defined (PR_FORK)
225 { PR_FORK
, "PR_FORK", "Inherit-on-fork is in effect" },
228 { PR_RLC
, "PR_RLC", "Run-on-last-close is in effect" },
230 #if defined (PR_PTRACE)
231 { PR_PTRACE
, "PR_PTRACE", "Process is being controlled by ptrace" },
233 #if defined (PR_PCINVAL)
234 { PR_PCINVAL
, "PR_PCINVAL", "PC refers to an invalid virtual address" },
236 #if defined (PR_ISSYS)
237 { PR_ISSYS
, "PR_ISSYS", "Is a system process" },
239 #if defined (PR_STEP)
240 { PR_STEP
, "PR_STEP", "Process has single step pending" },
243 { PR_KLC
, "PR_KLC", "Kill-on-last-close is in effect" },
245 #if defined (PR_ASYNC)
246 { PR_ASYNC
, "PR_ASYNC", "Asynchronous stop is in effect" },
248 #if defined (PR_PCOMPAT)
249 { PR_PCOMPAT
, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
254 /* Translate values in the pr_why field of the prstatus struct. */
256 static struct trans pr_why_table
[] =
258 #if defined (PR_REQUESTED)
259 { PR_REQUESTED
, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
261 #if defined (PR_SIGNALLED)
262 { PR_SIGNALLED
, "PR_SIGNALLED", "Receipt of a traced signal" },
264 #if defined (PR_FAULTED)
265 { PR_FAULTED
, "PR_FAULTED", "Incurred a traced hardware fault" },
267 #if defined (PR_SYSENTRY)
268 { PR_SYSENTRY
, "PR_SYSENTRY", "Entry to a traced system call" },
270 #if defined (PR_SYSEXIT)
271 { PR_SYSEXIT
, "PR_SYSEXIT", "Exit from a traced system call" },
273 #if defined (PR_JOBCONTROL)
274 { PR_JOBCONTROL
, "PR_JOBCONTROL", "Default job control stop signal action" },
276 #if defined (PR_SUSPENDED)
277 { PR_SUSPENDED
, "PR_SUSPENDED", "Process suspended" },
282 /* Hardware fault translation table. */
284 static struct trans faults_table
[] =
287 { FLTILL
, "FLTILL", "Illegal instruction" },
289 #if defined (FLTPRIV)
290 { FLTPRIV
, "FLTPRIV", "Privileged instruction" },
293 { FLTBPT
, "FLTBPT", "Breakpoint trap" },
295 #if defined (FLTTRACE)
296 { FLTTRACE
, "FLTTRACE", "Trace trap" },
298 #if defined (FLTACCESS)
299 { FLTACCESS
, "FLTACCESS", "Memory access fault" },
301 #if defined (FLTBOUNDS)
302 { FLTBOUNDS
, "FLTBOUNDS", "Memory bounds violation" },
304 #if defined (FLTIOVF)
305 { FLTIOVF
, "FLTIOVF", "Integer overflow" },
307 #if defined (FLTIZDIV)
308 { FLTIZDIV
, "FLTIZDIV", "Integer zero divide" },
311 { FLTFPE
, "FLTFPE", "Floating-point exception" },
313 #if defined (FLTSTACK)
314 { FLTSTACK
, "FLTSTACK", "Unrecoverable stack fault" },
316 #if defined (FLTPAGE)
317 { FLTPAGE
, "FLTPAGE", "Recoverable page fault" },
322 /* Translation table for signal generation information. See UNIX System
323 V Release 4 Programmer's Reference Manual, siginfo(5). */
325 static struct sigcode
{
330 } siginfo_table
[] = {
331 #if defined (SIGILL) && defined (ILL_ILLOPC)
332 { SIGILL
, ILL_ILLOPC
, "ILL_ILLOPC", "Illegal opcode" },
334 #if defined (SIGILL) && defined (ILL_ILLOPN)
335 { SIGILL
, ILL_ILLOPN
, "ILL_ILLOPN", "Illegal operand", },
337 #if defined (SIGILL) && defined (ILL_ILLADR)
338 { SIGILL
, ILL_ILLADR
, "ILL_ILLADR", "Illegal addressing mode" },
340 #if defined (SIGILL) && defined (ILL_ILLTRP)
341 { SIGILL
, ILL_ILLTRP
, "ILL_ILLTRP", "Illegal trap" },
343 #if defined (SIGILL) && defined (ILL_PRVOPC)
344 { SIGILL
, ILL_PRVOPC
, "ILL_PRVOPC", "Privileged opcode" },
346 #if defined (SIGILL) && defined (ILL_PRVREG)
347 { SIGILL
, ILL_PRVREG
, "ILL_PRVREG", "Privileged register" },
349 #if defined (SIGILL) && defined (ILL_COPROC)
350 { SIGILL
, ILL_COPROC
, "ILL_COPROC", "Coprocessor error" },
352 #if defined (SIGILL) && defined (ILL_BADSTK)
353 { SIGILL
, ILL_BADSTK
, "ILL_BADSTK", "Internal stack error" },
355 #if defined (SIGFPE) && defined (FPE_INTDIV)
356 { SIGFPE
, FPE_INTDIV
, "FPE_INTDIV", "Integer divide by zero" },
358 #if defined (SIGFPE) && defined (FPE_INTOVF)
359 { SIGFPE
, FPE_INTOVF
, "FPE_INTOVF", "Integer overflow" },
361 #if defined (SIGFPE) && defined (FPE_FLTDIV)
362 { SIGFPE
, FPE_FLTDIV
, "FPE_FLTDIV", "Floating point divide by zero" },
364 #if defined (SIGFPE) && defined (FPE_FLTOVF)
365 { SIGFPE
, FPE_FLTOVF
, "FPE_FLTOVF", "Floating point overflow" },
367 #if defined (SIGFPE) && defined (FPE_FLTUND)
368 { SIGFPE
, FPE_FLTUND
, "FPE_FLTUND", "Floating point underflow" },
370 #if defined (SIGFPE) && defined (FPE_FLTRES)
371 { SIGFPE
, FPE_FLTRES
, "FPE_FLTRES", "Floating point inexact result" },
373 #if defined (SIGFPE) && defined (FPE_FLTINV)
374 { SIGFPE
, FPE_FLTINV
, "FPE_FLTINV", "Invalid floating point operation" },
376 #if defined (SIGFPE) && defined (FPE_FLTSUB)
377 { SIGFPE
, FPE_FLTSUB
, "FPE_FLTSUB", "Subscript out of range" },
379 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
380 { SIGSEGV
, SEGV_MAPERR
, "SEGV_MAPERR", "Address not mapped to object" },
382 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
383 { SIGSEGV
, SEGV_ACCERR
, "SEGV_ACCERR", "Invalid permissions for object" },
385 #if defined (SIGBUS) && defined (BUS_ADRALN)
386 { SIGBUS
, BUS_ADRALN
, "BUS_ADRALN", "Invalid address alignment" },
388 #if defined (SIGBUS) && defined (BUS_ADRERR)
389 { SIGBUS
, BUS_ADRERR
, "BUS_ADRERR", "Non-existent physical address" },
391 #if defined (SIGBUS) && defined (BUS_OBJERR)
392 { SIGBUS
, BUS_OBJERR
, "BUS_OBJERR", "Object specific hardware error" },
394 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
395 { SIGTRAP
, TRAP_BRKPT
, "TRAP_BRKPT", "Process breakpoint" },
397 #if defined (SIGTRAP) && defined (TRAP_TRACE)
398 { SIGTRAP
, TRAP_TRACE
, "TRAP_TRACE", "Process trace trap" },
400 #if defined (SIGCLD) && defined (CLD_EXITED)
401 { SIGCLD
, CLD_EXITED
, "CLD_EXITED", "Child has exited" },
403 #if defined (SIGCLD) && defined (CLD_KILLED)
404 { SIGCLD
, CLD_KILLED
, "CLD_KILLED", "Child was killed" },
406 #if defined (SIGCLD) && defined (CLD_DUMPED)
407 { SIGCLD
, CLD_DUMPED
, "CLD_DUMPED", "Child has terminated abnormally" },
409 #if defined (SIGCLD) && defined (CLD_TRAPPED)
410 { SIGCLD
, CLD_TRAPPED
, "CLD_TRAPPED", "Traced child has trapped" },
412 #if defined (SIGCLD) && defined (CLD_STOPPED)
413 { SIGCLD
, CLD_STOPPED
, "CLD_STOPPED", "Child has stopped" },
415 #if defined (SIGCLD) && defined (CLD_CONTINUED)
416 { SIGCLD
, CLD_CONTINUED
, "CLD_CONTINUED", "Stopped child had continued" },
418 #if defined (SIGPOLL) && defined (POLL_IN)
419 { SIGPOLL
, POLL_IN
, "POLL_IN", "Input input available" },
421 #if defined (SIGPOLL) && defined (POLL_OUT)
422 { SIGPOLL
, POLL_OUT
, "POLL_OUT", "Output buffers available" },
424 #if defined (SIGPOLL) && defined (POLL_MSG)
425 { SIGPOLL
, POLL_MSG
, "POLL_MSG", "Input message available" },
427 #if defined (SIGPOLL) && defined (POLL_ERR)
428 { SIGPOLL
, POLL_ERR
, "POLL_ERR", "I/O error" },
430 #if defined (SIGPOLL) && defined (POLL_PRI)
431 { SIGPOLL
, POLL_PRI
, "POLL_PRI", "High priority input available" },
433 #if defined (SIGPOLL) && defined (POLL_HUP)
434 { SIGPOLL
, POLL_HUP
, "POLL_HUP", "Device disconnected" },
439 static char *syscall_table
[MAX_SYSCALLS
];
441 /* Prototypes for local functions */
443 static void procfs_stop
PARAMS ((void));
445 static int procfs_thread_alive
PARAMS ((int));
447 static int procfs_can_run
PARAMS ((void));
449 static void procfs_mourn_inferior
PARAMS ((void));
451 static void procfs_fetch_registers
PARAMS ((int));
453 static int procfs_wait
PARAMS ((int, struct target_waitstatus
*));
455 static void procfs_open
PARAMS ((char *, int));
457 static void procfs_files_info
PARAMS ((struct target_ops
*));
459 static void procfs_prepare_to_store
PARAMS ((void));
461 static void procfs_detach
PARAMS ((char *, int));
463 static void procfs_attach
PARAMS ((char *, int));
465 static void proc_set_exec_trap
PARAMS ((void));
467 static int procfs_init_inferior
PARAMS ((int));
469 static struct procinfo
*create_procinfo
PARAMS ((int));
471 static void procfs_store_registers
PARAMS ((int));
473 static int procfs_xfer_memory
PARAMS ((CORE_ADDR
, char *, int, int, struct target_ops
*));
475 static void procfs_kill_inferior
PARAMS ((void));
477 static char *sigcodedesc
PARAMS ((siginfo_t
*));
479 static char *sigcodename
PARAMS ((siginfo_t
*));
481 static struct procinfo
*wait_fd
PARAMS ((void));
483 static void remove_fd
PARAMS ((struct procinfo
*));
485 static void add_fd
PARAMS ((struct procinfo
*));
487 static void set_proc_siginfo
PARAMS ((struct procinfo
*, int));
489 static void init_syscall_table
PARAMS ((void));
491 static char *syscallname
PARAMS ((int));
493 static char *signalname
PARAMS ((int));
495 static char *errnoname
PARAMS ((int));
497 static int proc_address_to_fd
PARAMS ((struct procinfo
*, CORE_ADDR
, int));
499 static int open_proc_file
PARAMS ((int, struct procinfo
*, int, int));
501 static void close_proc_file
PARAMS ((struct procinfo
*));
503 static void unconditionally_kill_inferior
PARAMS ((struct procinfo
*));
505 static NORETURN
void proc_init_failed
PARAMS ((struct procinfo
*, char *)) ATTR_NORETURN
;
507 static void info_proc
PARAMS ((char *, int));
509 static void info_proc_flags
PARAMS ((struct procinfo
*, int));
511 static void info_proc_stop
PARAMS ((struct procinfo
*, int));
513 static void info_proc_siginfo
PARAMS ((struct procinfo
*, int));
515 static void info_proc_syscalls
PARAMS ((struct procinfo
*, int));
517 static void info_proc_mappings
PARAMS ((struct procinfo
*, int));
519 static void info_proc_signals
PARAMS ((struct procinfo
*, int));
521 static void info_proc_faults
PARAMS ((struct procinfo
*, int));
523 static char *mappingflags
PARAMS ((long));
525 static char *lookupname
PARAMS ((struct trans
*, unsigned int, char *));
527 static char *lookupdesc
PARAMS ((struct trans
*, unsigned int));
529 static int do_attach
PARAMS ((int pid
));
531 static void do_detach
PARAMS ((int siggnal
));
533 static void procfs_create_inferior
PARAMS ((char *, char *, char **));
535 static void procfs_notice_signals
PARAMS ((int pid
));
537 static void notice_signals
PARAMS ((struct procinfo
*, struct sig_ctl
*));
539 static struct procinfo
*find_procinfo
PARAMS ((pid_t pid
, int okfail
));
541 static int procfs_read_status
PARAMS ((struct procinfo
*));
542 static int procfs_write_pcwstop
PARAMS ((struct procinfo
*));
543 static void procfs_write_pckill
PARAMS ((struct procinfo
*));
545 typedef int syscall_func_t
PARAMS ((struct procinfo
*pi
, int syscall_num
,
546 int why
, int *rtnval
, int *statval
));
548 static void procfs_set_syscall_trap
PARAMS ((struct procinfo
*pi
,
549 int syscall_num
, int flags
,
550 syscall_func_t
*func
));
552 static void procfs_clear_syscall_trap
PARAMS ((struct procinfo
*pi
,
553 int syscall_num
, int errok
));
555 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
556 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
558 static syscall_func_t procfs_exit_handler
;
560 static syscall_func_t procfs_exec_handler
;
563 static syscall_func_t procfs_sproc_handler
;
564 static syscall_func_t procfs_fork_handler
;
567 #ifdef SYS_lwp_create
568 static syscall_func_t procfs_lwp_creation_handler
;
571 static void modify_inherit_on_fork_flag
PARAMS ((int fd
, int flag
));
572 static void modify_run_on_last_close_flag
PARAMS ((int fd
, int flag
));
576 struct procfs_syscall_handler
578 int syscall_num
; /* The number of the system call being handled */
579 /* The function to be called */
580 syscall_func_t
*func
;
583 static void procfs_resume
PARAMS ((int pid
, int step
,
584 enum target_signal signo
));
586 /* External function prototypes that can't be easily included in any
587 header file because the args are typedefs in system include files. */
589 extern void supply_gregset
PARAMS ((gregset_t
*));
591 extern void fill_gregset
PARAMS ((gregset_t
*, int));
594 extern void supply_fpregset
PARAMS ((fpregset_t
*));
596 extern void fill_fpregset
PARAMS ((fpregset_t
*, int));
603 find_procinfo -- convert a process id to a struct procinfo
607 static struct procinfo * find_procinfo (pid_t pid, int okfail);
611 Given a process id, look it up in the procinfo chain. Returns
612 a struct procinfo *. If can't find pid, then call error(),
613 unless okfail is set, in which case, return NULL;
616 static struct procinfo
*
617 find_procinfo (pid
, okfail
)
621 struct procinfo
*procinfo
;
623 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
624 if (procinfo
->pid
== pid
)
630 error ("procfs (find_procinfo): Couldn't locate pid %d", pid
);
637 current_procinfo -- convert inferior_pid to a struct procinfo
641 static struct procinfo * current_procinfo;
645 Looks up inferior_pid in the procinfo chain. Always returns a
646 struct procinfo *. If process can't be found, we error() out.
649 #define current_procinfo find_procinfo (inferior_pid, 0)
655 add_fd -- Add the fd to the poll/select list
659 static void add_fd (struct procinfo *);
663 Add the fd of the supplied procinfo to the list of fds used for
664 poll/select operations.
671 if (num_poll_list
<= 0)
672 poll_list
= (struct pollfd
*) xmalloc (sizeof (struct pollfd
));
674 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
676 * sizeof (struct pollfd
));
677 poll_list
[num_poll_list
].fd
= pi
->ctl_fd
;
679 poll_list
[num_poll_list
].events
= POLLWRNORM
;
681 poll_list
[num_poll_list
].events
= POLLPRI
;
693 for (i
= 0; i
< num_poll_list
; i
++)
695 if (poll_list
[i
].fd
== pi
->ctl_fd
)
697 if (i
!= num_poll_list
- 1)
698 memcpy (poll_list
+ i
, poll_list
+ i
+ 1,
699 (num_poll_list
- i
- 1) * sizeof (struct pollfd
));
703 if (num_poll_list
== 0)
706 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
708 * sizeof (struct pollfd
));
718 procfs_read_status - get procfs fd status
722 static int procfs_read_status (pi) struct procinfo *pi;
726 Given a pointer to a procinfo struct, get the status of
727 the status_fd in the appropriate way. Returns 0 on failure,
732 procfs_read_status (pi
)
735 #ifdef PROCFS_USE_READ_WRITE
736 if ((lseek (pi
->status_fd
, 0, SEEK_SET
) < 0) ||
737 (read (pi
->status_fd
, (char *) &pi
->prstatus
,
738 sizeof (gdb_prstatus_t
)) != sizeof (gdb_prstatus_t
)))
740 if (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
751 procfs_write_pcwstop - send a PCWSTOP to procfs fd
755 static int procfs_write_pcwstop (pi) struct procinfo *pi;
759 Given a pointer to a procinfo struct, send a PCWSTOP to
760 the ctl_fd in the appropriate way. Returns 0 on failure,
765 procfs_write_pcwstop (pi
)
768 #ifdef PROCFS_USE_READ_WRITE
770 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
772 if (ioctl (pi
->ctl_fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
783 procfs_write_pckill - send a kill to procfs fd
787 static void procfs_write_pckill (pi) struct procinfo *pi;
791 Given a pointer to a procinfo struct, send a kill to
792 the ctl_fd in the appropriate way. Returns 0 on failure,
797 procfs_write_pckill (pi
)
800 #ifdef PROCFS_USE_READ_WRITE
801 struct proc_ctl pctl
;
804 write (pi
->ctl_fd
, &pctl
, sizeof (struct proc_ctl
));
807 ioctl (pi
->ctl_fd
, PIOCKILL
, &signo
);
811 static struct procinfo
*
820 set_sigint_trap (); /* Causes SIGINT to be passed on to the
827 num_fds
= poll (poll_list
, num_poll_list
, -1);
830 if (num_fds
< 0 && errno
== EINTR
)
832 print_sys_errmsg ("poll failed", errno
);
833 error ("Poll failed, returned %d", num_fds
);
835 #else /* LOSING_POLL */
836 pi
= current_procinfo
;
838 while (!procfs_write_pcwstop (pi
))
842 /* Process exited. */
843 pi
->prstatus
.pr_flags
= 0;
846 else if (errno
!= EINTR
)
848 print_sys_errmsg (pi
->pathname
, errno
);
849 error ("procfs_write_pcwstop failed");
853 #endif /* LOSING_POLL */
855 clear_sigint_trap ();
860 for (i
= 0; i
< num_poll_list
&& num_fds
> 0; i
++)
862 if ((poll_list
[i
].revents
& (POLLWRNORM
|POLLPRI
|POLLERR
|POLLHUP
|POLLNVAL
)) == 0)
864 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
866 if (poll_list
[i
].fd
== pi
->ctl_fd
)
868 if (!procfs_read_status(pi
))
870 print_sys_errmsg (pi
->pathname
, errno
);
871 error ("procfs_read_status failed");
880 error ("wait_fd: Couldn't find procinfo for fd %d\n",
883 #endif /* LOSING_POLL */
892 lookupdesc -- translate a value to a summary desc string
896 static char *lookupdesc (struct trans *transp, unsigned int val);
900 Given a pointer to a translation table and a value to be translated,
901 lookup the desc string and return it.
905 lookupdesc (transp
, val
)
906 struct trans
*transp
;
911 for (desc
= NULL
; transp
-> name
!= NULL
; transp
++)
913 if (transp
-> value
== val
)
915 desc
= transp
-> desc
;
920 /* Didn't find a translation for the specified value, set a default one. */
933 lookupname -- translate a value to symbolic name
937 static char *lookupname (struct trans *transp, unsigned int val,
942 Given a pointer to a translation table, a value to be translated,
943 and a default prefix to return if the value can't be translated,
944 match the value with one of the translation table entries and
945 return a pointer to the symbolic name.
947 If no match is found it just returns the value as a printable string,
948 with the given prefix. The previous such value, if any, is freed
953 lookupname (transp
, val
, prefix
)
954 struct trans
*transp
;
961 for (name
= NULL
; transp
-> name
!= NULL
; transp
++)
963 if (transp
-> value
== val
)
965 name
= transp
-> name
;
970 /* Didn't find a translation for the specified value, build a default
971 one using the specified prefix and return it. The lifetime of
972 the value is only until the next one is needed. */
980 locbuf
= xmalloc (strlen (prefix
) + 16);
981 sprintf (locbuf
, "%s %u", prefix
, val
);
993 static char locbuf
[32];
995 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
997 if ((scp
-> signo
== sip
-> si_signo
) &&
998 (scp
-> code
== sip
-> si_code
))
1000 name
= scp
-> codename
;
1006 sprintf (locbuf
, "sigcode %u", sip
-> si_signo
);
1016 struct sigcode
*scp
;
1019 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1021 if ((scp
-> signo
== sip
-> si_signo
) &&
1022 (scp
-> code
== sip
-> si_code
))
1030 desc
= "Unrecognized signal or trap use";
1039 syscallname - translate a system call number into a system call name
1043 char *syscallname (int syscallnum)
1047 Given a system call number, translate it into the printable name
1048 of a system call, or into "syscall <num>" if it is an unknown
1053 syscallname (syscallnum
)
1056 static char locbuf
[32];
1058 if (syscallnum
>= 0 && syscallnum
< MAX_SYSCALLS
1059 && syscall_table
[syscallnum
] != NULL
)
1060 return syscall_table
[syscallnum
];
1063 sprintf (locbuf
, "syscall %u", syscallnum
);
1072 init_syscall_table - initialize syscall translation table
1076 void init_syscall_table (void)
1080 Dynamically initialize the translation table to convert system
1081 call numbers into printable system call names. Done once per
1082 gdb run, on initialization.
1086 This is awfully ugly, but preprocessor tricks to make it prettier
1087 tend to be nonportable.
1091 init_syscall_table ()
1093 #if defined (SYS_exit)
1094 syscall_table
[SYS_exit
] = "exit";
1096 #if defined (SYS_fork)
1097 syscall_table
[SYS_fork
] = "fork";
1099 #if defined (SYS_read)
1100 syscall_table
[SYS_read
] = "read";
1102 #if defined (SYS_write)
1103 syscall_table
[SYS_write
] = "write";
1105 #if defined (SYS_open)
1106 syscall_table
[SYS_open
] = "open";
1108 #if defined (SYS_close)
1109 syscall_table
[SYS_close
] = "close";
1111 #if defined (SYS_wait)
1112 syscall_table
[SYS_wait
] = "wait";
1114 #if defined (SYS_creat)
1115 syscall_table
[SYS_creat
] = "creat";
1117 #if defined (SYS_link)
1118 syscall_table
[SYS_link
] = "link";
1120 #if defined (SYS_unlink)
1121 syscall_table
[SYS_unlink
] = "unlink";
1123 #if defined (SYS_exec)
1124 syscall_table
[SYS_exec
] = "exec";
1126 #if defined (SYS_execv)
1127 syscall_table
[SYS_execv
] = "execv";
1129 #if defined (SYS_execve)
1130 syscall_table
[SYS_execve
] = "execve";
1132 #if defined (SYS_chdir)
1133 syscall_table
[SYS_chdir
] = "chdir";
1135 #if defined (SYS_time)
1136 syscall_table
[SYS_time
] = "time";
1138 #if defined (SYS_mknod)
1139 syscall_table
[SYS_mknod
] = "mknod";
1141 #if defined (SYS_chmod)
1142 syscall_table
[SYS_chmod
] = "chmod";
1144 #if defined (SYS_chown)
1145 syscall_table
[SYS_chown
] = "chown";
1147 #if defined (SYS_brk)
1148 syscall_table
[SYS_brk
] = "brk";
1150 #if defined (SYS_stat)
1151 syscall_table
[SYS_stat
] = "stat";
1153 #if defined (SYS_lseek)
1154 syscall_table
[SYS_lseek
] = "lseek";
1156 #if defined (SYS_getpid)
1157 syscall_table
[SYS_getpid
] = "getpid";
1159 #if defined (SYS_mount)
1160 syscall_table
[SYS_mount
] = "mount";
1162 #if defined (SYS_umount)
1163 syscall_table
[SYS_umount
] = "umount";
1165 #if defined (SYS_setuid)
1166 syscall_table
[SYS_setuid
] = "setuid";
1168 #if defined (SYS_getuid)
1169 syscall_table
[SYS_getuid
] = "getuid";
1171 #if defined (SYS_stime)
1172 syscall_table
[SYS_stime
] = "stime";
1174 #if defined (SYS_ptrace)
1175 syscall_table
[SYS_ptrace
] = "ptrace";
1177 #if defined (SYS_alarm)
1178 syscall_table
[SYS_alarm
] = "alarm";
1180 #if defined (SYS_fstat)
1181 syscall_table
[SYS_fstat
] = "fstat";
1183 #if defined (SYS_pause)
1184 syscall_table
[SYS_pause
] = "pause";
1186 #if defined (SYS_utime)
1187 syscall_table
[SYS_utime
] = "utime";
1189 #if defined (SYS_stty)
1190 syscall_table
[SYS_stty
] = "stty";
1192 #if defined (SYS_gtty)
1193 syscall_table
[SYS_gtty
] = "gtty";
1195 #if defined (SYS_access)
1196 syscall_table
[SYS_access
] = "access";
1198 #if defined (SYS_nice)
1199 syscall_table
[SYS_nice
] = "nice";
1201 #if defined (SYS_statfs)
1202 syscall_table
[SYS_statfs
] = "statfs";
1204 #if defined (SYS_sync)
1205 syscall_table
[SYS_sync
] = "sync";
1207 #if defined (SYS_kill)
1208 syscall_table
[SYS_kill
] = "kill";
1210 #if defined (SYS_fstatfs)
1211 syscall_table
[SYS_fstatfs
] = "fstatfs";
1213 #if defined (SYS_pgrpsys)
1214 syscall_table
[SYS_pgrpsys
] = "pgrpsys";
1216 #if defined (SYS_xenix)
1217 syscall_table
[SYS_xenix
] = "xenix";
1219 #if defined (SYS_dup)
1220 syscall_table
[SYS_dup
] = "dup";
1222 #if defined (SYS_pipe)
1223 syscall_table
[SYS_pipe
] = "pipe";
1225 #if defined (SYS_times)
1226 syscall_table
[SYS_times
] = "times";
1228 #if defined (SYS_profil)
1229 syscall_table
[SYS_profil
] = "profil";
1231 #if defined (SYS_plock)
1232 syscall_table
[SYS_plock
] = "plock";
1234 #if defined (SYS_setgid)
1235 syscall_table
[SYS_setgid
] = "setgid";
1237 #if defined (SYS_getgid)
1238 syscall_table
[SYS_getgid
] = "getgid";
1240 #if defined (SYS_signal)
1241 syscall_table
[SYS_signal
] = "signal";
1243 #if defined (SYS_msgsys)
1244 syscall_table
[SYS_msgsys
] = "msgsys";
1246 #if defined (SYS_sys3b)
1247 syscall_table
[SYS_sys3b
] = "sys3b";
1249 #if defined (SYS_sysi86)
1250 syscall_table
[SYS_sysi86
] = "sysi86";
1252 #if defined (SYS_acct)
1253 syscall_table
[SYS_acct
] = "acct";
1255 #if defined (SYS_shmsys)
1256 syscall_table
[SYS_shmsys
] = "shmsys";
1258 #if defined (SYS_semsys)
1259 syscall_table
[SYS_semsys
] = "semsys";
1261 #if defined (SYS_ioctl)
1262 syscall_table
[SYS_ioctl
] = "ioctl";
1264 #if defined (SYS_uadmin)
1265 syscall_table
[SYS_uadmin
] = "uadmin";
1267 #if defined (SYS_utssys)
1268 syscall_table
[SYS_utssys
] = "utssys";
1270 #if defined (SYS_fsync)
1271 syscall_table
[SYS_fsync
] = "fsync";
1273 #if defined (SYS_umask)
1274 syscall_table
[SYS_umask
] = "umask";
1276 #if defined (SYS_chroot)
1277 syscall_table
[SYS_chroot
] = "chroot";
1279 #if defined (SYS_fcntl)
1280 syscall_table
[SYS_fcntl
] = "fcntl";
1282 #if defined (SYS_ulimit)
1283 syscall_table
[SYS_ulimit
] = "ulimit";
1285 #if defined (SYS_rfsys)
1286 syscall_table
[SYS_rfsys
] = "rfsys";
1288 #if defined (SYS_rmdir)
1289 syscall_table
[SYS_rmdir
] = "rmdir";
1291 #if defined (SYS_mkdir)
1292 syscall_table
[SYS_mkdir
] = "mkdir";
1294 #if defined (SYS_getdents)
1295 syscall_table
[SYS_getdents
] = "getdents";
1297 #if defined (SYS_sysfs)
1298 syscall_table
[SYS_sysfs
] = "sysfs";
1300 #if defined (SYS_getmsg)
1301 syscall_table
[SYS_getmsg
] = "getmsg";
1303 #if defined (SYS_putmsg)
1304 syscall_table
[SYS_putmsg
] = "putmsg";
1306 #if defined (SYS_poll)
1307 syscall_table
[SYS_poll
] = "poll";
1309 #if defined (SYS_lstat)
1310 syscall_table
[SYS_lstat
] = "lstat";
1312 #if defined (SYS_symlink)
1313 syscall_table
[SYS_symlink
] = "symlink";
1315 #if defined (SYS_readlink)
1316 syscall_table
[SYS_readlink
] = "readlink";
1318 #if defined (SYS_setgroups)
1319 syscall_table
[SYS_setgroups
] = "setgroups";
1321 #if defined (SYS_getgroups)
1322 syscall_table
[SYS_getgroups
] = "getgroups";
1324 #if defined (SYS_fchmod)
1325 syscall_table
[SYS_fchmod
] = "fchmod";
1327 #if defined (SYS_fchown)
1328 syscall_table
[SYS_fchown
] = "fchown";
1330 #if defined (SYS_sigprocmask)
1331 syscall_table
[SYS_sigprocmask
] = "sigprocmask";
1333 #if defined (SYS_sigsuspend)
1334 syscall_table
[SYS_sigsuspend
] = "sigsuspend";
1336 #if defined (SYS_sigaltstack)
1337 syscall_table
[SYS_sigaltstack
] = "sigaltstack";
1339 #if defined (SYS_sigaction)
1340 syscall_table
[SYS_sigaction
] = "sigaction";
1342 #if defined (SYS_sigpending)
1343 syscall_table
[SYS_sigpending
] = "sigpending";
1345 #if defined (SYS_context)
1346 syscall_table
[SYS_context
] = "context";
1348 #if defined (SYS_evsys)
1349 syscall_table
[SYS_evsys
] = "evsys";
1351 #if defined (SYS_evtrapret)
1352 syscall_table
[SYS_evtrapret
] = "evtrapret";
1354 #if defined (SYS_statvfs)
1355 syscall_table
[SYS_statvfs
] = "statvfs";
1357 #if defined (SYS_fstatvfs)
1358 syscall_table
[SYS_fstatvfs
] = "fstatvfs";
1360 #if defined (SYS_nfssys)
1361 syscall_table
[SYS_nfssys
] = "nfssys";
1363 #if defined (SYS_waitsys)
1364 syscall_table
[SYS_waitsys
] = "waitsys";
1366 #if defined (SYS_sigsendsys)
1367 syscall_table
[SYS_sigsendsys
] = "sigsendsys";
1369 #if defined (SYS_hrtsys)
1370 syscall_table
[SYS_hrtsys
] = "hrtsys";
1372 #if defined (SYS_acancel)
1373 syscall_table
[SYS_acancel
] = "acancel";
1375 #if defined (SYS_async)
1376 syscall_table
[SYS_async
] = "async";
1378 #if defined (SYS_priocntlsys)
1379 syscall_table
[SYS_priocntlsys
] = "priocntlsys";
1381 #if defined (SYS_pathconf)
1382 syscall_table
[SYS_pathconf
] = "pathconf";
1384 #if defined (SYS_mincore)
1385 syscall_table
[SYS_mincore
] = "mincore";
1387 #if defined (SYS_mmap)
1388 syscall_table
[SYS_mmap
] = "mmap";
1390 #if defined (SYS_mprotect)
1391 syscall_table
[SYS_mprotect
] = "mprotect";
1393 #if defined (SYS_munmap)
1394 syscall_table
[SYS_munmap
] = "munmap";
1396 #if defined (SYS_fpathconf)
1397 syscall_table
[SYS_fpathconf
] = "fpathconf";
1399 #if defined (SYS_vfork)
1400 syscall_table
[SYS_vfork
] = "vfork";
1402 #if defined (SYS_fchdir)
1403 syscall_table
[SYS_fchdir
] = "fchdir";
1405 #if defined (SYS_readv)
1406 syscall_table
[SYS_readv
] = "readv";
1408 #if defined (SYS_writev)
1409 syscall_table
[SYS_writev
] = "writev";
1411 #if defined (SYS_xstat)
1412 syscall_table
[SYS_xstat
] = "xstat";
1414 #if defined (SYS_lxstat)
1415 syscall_table
[SYS_lxstat
] = "lxstat";
1417 #if defined (SYS_fxstat)
1418 syscall_table
[SYS_fxstat
] = "fxstat";
1420 #if defined (SYS_xmknod)
1421 syscall_table
[SYS_xmknod
] = "xmknod";
1423 #if defined (SYS_clocal)
1424 syscall_table
[SYS_clocal
] = "clocal";
1426 #if defined (SYS_setrlimit)
1427 syscall_table
[SYS_setrlimit
] = "setrlimit";
1429 #if defined (SYS_getrlimit)
1430 syscall_table
[SYS_getrlimit
] = "getrlimit";
1432 #if defined (SYS_lchown)
1433 syscall_table
[SYS_lchown
] = "lchown";
1435 #if defined (SYS_memcntl)
1436 syscall_table
[SYS_memcntl
] = "memcntl";
1438 #if defined (SYS_getpmsg)
1439 syscall_table
[SYS_getpmsg
] = "getpmsg";
1441 #if defined (SYS_putpmsg)
1442 syscall_table
[SYS_putpmsg
] = "putpmsg";
1444 #if defined (SYS_rename)
1445 syscall_table
[SYS_rename
] = "rename";
1447 #if defined (SYS_uname)
1448 syscall_table
[SYS_uname
] = "uname";
1450 #if defined (SYS_setegid)
1451 syscall_table
[SYS_setegid
] = "setegid";
1453 #if defined (SYS_sysconfig)
1454 syscall_table
[SYS_sysconfig
] = "sysconfig";
1456 #if defined (SYS_adjtime)
1457 syscall_table
[SYS_adjtime
] = "adjtime";
1459 #if defined (SYS_systeminfo)
1460 syscall_table
[SYS_systeminfo
] = "systeminfo";
1462 #if defined (SYS_seteuid)
1463 syscall_table
[SYS_seteuid
] = "seteuid";
1465 #if defined (SYS_sproc)
1466 syscall_table
[SYS_sproc
] = "sproc";
1468 #if defined (SYS_keyctl)
1469 syscall_table
[SYS_keyctl
] = "keyctl";
1471 #if defined (SYS_secsys)
1472 syscall_table
[SYS_secsys
] = "secsys";
1474 #if defined (SYS_filepriv)
1475 syscall_table
[SYS_filepriv
] = "filepriv";
1477 #if defined (SYS_procpriv)
1478 syscall_table
[SYS_procpriv
] = "procpriv";
1480 #if defined (SYS_devstat)
1481 syscall_table
[SYS_devstat
] = "devstat";
1483 #if defined (SYS_aclipc)
1484 syscall_table
[SYS_aclipc
] = "aclipc";
1486 #if defined (SYS_fdevstat)
1487 syscall_table
[SYS_fdevstat
] = "fdevstat";
1489 #if defined (SYS_flvlfile)
1490 syscall_table
[SYS_flvlfile
] = "flvlfile";
1492 #if defined (SYS_lvlfile)
1493 syscall_table
[SYS_lvlfile
] = "lvlfile";
1495 #if defined (SYS_lvlequal)
1496 syscall_table
[SYS_lvlequal
] = "lvlequal";
1498 #if defined (SYS_lvlproc)
1499 syscall_table
[SYS_lvlproc
] = "lvlproc";
1501 #if defined (SYS_lvlipc)
1502 syscall_table
[SYS_lvlipc
] = "lvlipc";
1504 #if defined (SYS_acl)
1505 syscall_table
[SYS_acl
] = "acl";
1507 #if defined (SYS_auditevt)
1508 syscall_table
[SYS_auditevt
] = "auditevt";
1510 #if defined (SYS_auditctl)
1511 syscall_table
[SYS_auditctl
] = "auditctl";
1513 #if defined (SYS_auditdmp)
1514 syscall_table
[SYS_auditdmp
] = "auditdmp";
1516 #if defined (SYS_auditlog)
1517 syscall_table
[SYS_auditlog
] = "auditlog";
1519 #if defined (SYS_auditbuf)
1520 syscall_table
[SYS_auditbuf
] = "auditbuf";
1522 #if defined (SYS_lvldom)
1523 syscall_table
[SYS_lvldom
] = "lvldom";
1525 #if defined (SYS_lvlvfs)
1526 syscall_table
[SYS_lvlvfs
] = "lvlvfs";
1528 #if defined (SYS_mkmld)
1529 syscall_table
[SYS_mkmld
] = "mkmld";
1531 #if defined (SYS_mldmode)
1532 syscall_table
[SYS_mldmode
] = "mldmode";
1534 #if defined (SYS_secadvise)
1535 syscall_table
[SYS_secadvise
] = "secadvise";
1537 #if defined (SYS_online)
1538 syscall_table
[SYS_online
] = "online";
1540 #if defined (SYS_setitimer)
1541 syscall_table
[SYS_setitimer
] = "setitimer";
1543 #if defined (SYS_getitimer)
1544 syscall_table
[SYS_getitimer
] = "getitimer";
1546 #if defined (SYS_gettimeofday)
1547 syscall_table
[SYS_gettimeofday
] = "gettimeofday";
1549 #if defined (SYS_settimeofday)
1550 syscall_table
[SYS_settimeofday
] = "settimeofday";
1552 #if defined (SYS_lwpcreate)
1553 syscall_table
[SYS_lwpcreate
] = "lwpcreate";
1555 #if defined (SYS_lwpexit)
1556 syscall_table
[SYS_lwpexit
] = "lwpexit";
1558 #if defined (SYS_lwpwait)
1559 syscall_table
[SYS_lwpwait
] = "lwpwait";
1561 #if defined (SYS_lwpself)
1562 syscall_table
[SYS_lwpself
] = "lwpself";
1564 #if defined (SYS_lwpinfo)
1565 syscall_table
[SYS_lwpinfo
] = "lwpinfo";
1567 #if defined (SYS_lwpprivate)
1568 syscall_table
[SYS_lwpprivate
] = "lwpprivate";
1570 #if defined (SYS_processor_bind)
1571 syscall_table
[SYS_processor_bind
] = "processor_bind";
1573 #if defined (SYS_processor_exbind)
1574 syscall_table
[SYS_processor_exbind
] = "processor_exbind";
1576 #if defined (SYS_prepblock)
1577 syscall_table
[SYS_prepblock
] = "prepblock";
1579 #if defined (SYS_block)
1580 syscall_table
[SYS_block
] = "block";
1582 #if defined (SYS_rdblock)
1583 syscall_table
[SYS_rdblock
] = "rdblock";
1585 #if defined (SYS_unblock)
1586 syscall_table
[SYS_unblock
] = "unblock";
1588 #if defined (SYS_cancelblock)
1589 syscall_table
[SYS_cancelblock
] = "cancelblock";
1591 #if defined (SYS_pread)
1592 syscall_table
[SYS_pread
] = "pread";
1594 #if defined (SYS_pwrite)
1595 syscall_table
[SYS_pwrite
] = "pwrite";
1597 #if defined (SYS_truncate)
1598 syscall_table
[SYS_truncate
] = "truncate";
1600 #if defined (SYS_ftruncate)
1601 syscall_table
[SYS_ftruncate
] = "ftruncate";
1603 #if defined (SYS_lwpkill)
1604 syscall_table
[SYS_lwpkill
] = "lwpkill";
1606 #if defined (SYS_sigwait)
1607 syscall_table
[SYS_sigwait
] = "sigwait";
1609 #if defined (SYS_fork1)
1610 syscall_table
[SYS_fork1
] = "fork1";
1612 #if defined (SYS_forkall)
1613 syscall_table
[SYS_forkall
] = "forkall";
1615 #if defined (SYS_modload)
1616 syscall_table
[SYS_modload
] = "modload";
1618 #if defined (SYS_moduload)
1619 syscall_table
[SYS_moduload
] = "moduload";
1621 #if defined (SYS_modpath)
1622 syscall_table
[SYS_modpath
] = "modpath";
1624 #if defined (SYS_modstat)
1625 syscall_table
[SYS_modstat
] = "modstat";
1627 #if defined (SYS_modadm)
1628 syscall_table
[SYS_modadm
] = "modadm";
1630 #if defined (SYS_getksym)
1631 syscall_table
[SYS_getksym
] = "getksym";
1633 #if defined (SYS_lwpsuspend)
1634 syscall_table
[SYS_lwpsuspend
] = "lwpsuspend";
1636 #if defined (SYS_lwpcontinue)
1637 syscall_table
[SYS_lwpcontinue
] = "lwpcontinue";
1639 #if defined (SYS_priocntllst)
1640 syscall_table
[SYS_priocntllst
] = "priocntllst";
1642 #if defined (SYS_sleep)
1643 syscall_table
[SYS_sleep
] = "sleep";
1645 #if defined (SYS_lwp_sema_wait)
1646 syscall_table
[SYS_lwp_sema_wait
] = "lwp_sema_wait";
1648 #if defined (SYS_lwp_sema_post)
1649 syscall_table
[SYS_lwp_sema_post
] = "lwp_sema_post";
1651 #if defined (SYS_lwp_sema_trywait)
1652 syscall_table
[SYS_lwp_sema_trywait
] = "lwp_sema_trywait";
1660 procfs_kill_inferior - kill any currently inferior
1664 void procfs_kill_inferior (void)
1668 Kill any current inferior.
1672 Kills even attached inferiors. Presumably the user has already
1673 been prompted that the inferior is an attached one rather than
1674 one started by gdb. (FIXME?)
1679 procfs_kill_inferior ()
1681 target_mourn_inferior ();
1688 unconditionally_kill_inferior - terminate the inferior
1692 static void unconditionally_kill_inferior (struct procinfo *)
1696 Kill the specified inferior.
1700 A possibly useful enhancement would be to first try sending
1701 the inferior a terminate signal, politely asking it to commit
1702 suicide, before we murder it (we could call that
1703 politely_kill_inferior()).
1708 unconditionally_kill_inferior (pi
)
1709 struct procinfo
*pi
;
1712 struct proc_ctl pctl
;
1714 ppid
= pi
->prstatus
.pr_ppid
;
1716 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
1717 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1718 before the PIOCKILL, otherwise it might generate a corrupted core
1719 file for the inferior. */
1720 ioctl (pi
->ctl_fd
, PIOCSSIG
, NULL
);
1722 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1723 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1724 to kill the inferior, otherwise it might remain stopped with a
1726 We do not check the result of the PIOCSSIG, the inferior might have
1729 struct siginfo newsiginfo
;
1731 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
1732 newsiginfo
.si_signo
= SIGKILL
;
1733 newsiginfo
.si_code
= 0;
1734 newsiginfo
.si_errno
= 0;
1735 newsiginfo
.si_pid
= getpid ();
1736 newsiginfo
.si_uid
= getuid ();
1737 ioctl (pi
->ctl_fd
, PIOCSSIG
, &newsiginfo
);
1739 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1740 procfs_write_pckill (pi
);
1741 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1744 /* With Alpha OSF/1 procfs, the process remains stopped after the inferior
1745 gets killed. After some time, the stop reason of the inferior changes
1746 to PR_DEAD and a PIOCRUN ioctl must be used to finally terminate the
1747 process. While the stop reason has not yet changed to PR_DEAD,
1748 the PIOCRUN will return with EAGAIN, and we keep trying.
1749 Any other errors are silently ignored as the inferior might have
1751 while (procfs_read_status (pi
) && (pi
->prstatus
.pr_flags
& PR_STOPPED
))
1753 pi
->prrun
.pr_flags
= PRCFAULT
;
1754 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) >= 0 || errno
!= EAGAIN
)
1760 close_proc_file (pi
);
1762 /* Only wait() for our direct children. Our grandchildren zombies are killed
1763 by the death of their parents. */
1765 if (ppid
== getpid())
1773 procfs_xfer_memory -- copy data to or from inferior memory space
1777 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1778 int dowrite, struct target_ops target)
1782 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1783 from/to debugger memory starting at MYADDR. Copy from inferior
1784 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1786 Returns the length copied, which is either the LEN argument or
1787 zero. This xfer function does not do partial moves, since procfs_ops
1788 doesn't allow memory operations to cross below us in the target stack
1793 The /proc interface makes this an almost trivial task.
1797 procfs_xfer_memory (memaddr
, myaddr
, len
, dowrite
, target
)
1802 struct target_ops
*target
; /* ignored */
1805 struct procinfo
*pi
;
1807 pi
= current_procinfo
;
1809 if (lseek(pi
->as_fd
, (off_t
) memaddr
, SEEK_SET
) == (off_t
) memaddr
)
1813 nbytes
= write (pi
->as_fd
, myaddr
, len
);
1817 nbytes
= read (pi
->as_fd
, myaddr
, len
);
1831 procfs_store_registers -- copy register values back to inferior
1835 void procfs_store_registers (int regno)
1839 Store our current register values back into the inferior. If
1840 REGNO is -1 then store all the register, otherwise store just
1841 the value specified by REGNO.
1845 If we are storing only a single register, we first have to get all
1846 the current values from the process, overwrite the desired register
1847 in the gregset with the one we want from gdb's registers, and then
1848 send the whole set back to the process. For writing all the
1849 registers, all we have to do is generate the gregset and send it to
1852 Also note that the process has to be stopped on an event of interest
1853 for this to work, which basically means that it has to have been
1854 run under the control of one of the other /proc ioctl calls and not
1855 ptrace. Since we don't use ptrace anyway, we don't worry about this
1856 fine point, but it is worth noting for future reference.
1858 Gdb is confused about what this function is supposed to return.
1859 Some versions return a value, others return nothing. Some are
1860 declared to return a value and actually return nothing. Gdb ignores
1861 anything returned. (FIXME)
1866 procfs_store_registers (regno
)
1869 struct procinfo
*pi
;
1870 #ifdef PROCFS_USE_READ_WRITE
1871 struct greg_ctl greg
;
1872 struct fpreg_ctl fpreg
;
1875 pi
= current_procinfo
;
1877 #ifdef PROCFS_USE_READ_WRITE
1880 procfs_read_status (pi
);
1881 memcpy ((char *) &greg
.gregset
,
1882 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
,
1883 sizeof (gregset_t
));
1885 fill_gregset (&greg
.gregset
, regno
);
1887 write (pi
->ctl_fd
, &greg
, sizeof (greg
));
1888 #else /* PROCFS_USE_READ_WRITE */
1891 ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
);
1893 fill_gregset (&pi
->gregset
.gregset
, regno
);
1894 ioctl (pi
->ctl_fd
, PIOCSREG
, &pi
->gregset
.gregset
);
1895 #endif /* PROCFS_USE_READ_WRITE */
1897 #if defined (FP0_REGNUM)
1899 /* Now repeat everything using the floating point register set, if the
1900 target has floating point hardware. Since we ignore the returned value,
1901 we'll never know whether it worked or not anyway. */
1903 #ifdef PROCFS_USE_READ_WRITE
1906 procfs_read_status (pi
);
1907 memcpy ((char *) &fpreg
.fpregset
,
1908 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
,
1909 sizeof (fpregset_t
));
1911 fill_fpregset (&fpreg
.fpregset
, regno
);
1912 fpreg
.cmd
= PCSFPREG
;
1913 write (pi
->ctl_fd
, &fpreg
, sizeof (fpreg
));
1914 #else /* PROCFS_USE_READ_WRITE */
1917 ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
);
1919 fill_fpregset (&pi
->fpregset
.fpregset
, regno
);
1920 ioctl (pi
->ctl_fd
, PIOCSFPREG
, &pi
->fpregset
.fpregset
);
1921 #endif /* PROCFS_USE_READ_WRITE */
1923 #endif /* FP0_REGNUM */
1931 create_procinfo - initialize access to a /proc entry
1935 struct procinfo * create_procinfo (int pid)
1939 Allocate a procinfo structure, open the /proc file and then set up the
1940 set of signals and faults that are to be traced. Returns a pointer to
1941 the new procinfo structure.
1945 If proc_init_failed ever gets called, control returns to the command
1946 processing loop via the standard error handling code.
1950 static struct procinfo
*
1951 create_procinfo (pid
)
1954 struct procinfo
*pi
;
1955 struct sig_ctl sctl
;
1956 struct flt_ctl fctl
;
1958 pi
= find_procinfo (pid
, 1);
1960 return pi
; /* All done! It already exists */
1962 pi
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
1964 if (!open_proc_file (pid
, pi
, O_RDWR
, 1))
1965 proc_init_failed (pi
, "can't open process file");
1967 /* open_proc_file may modify pid. */
1971 /* Add new process to process info list */
1973 pi
->next
= procinfo_list
;
1976 add_fd (pi
); /* Add to list for poll/select */
1978 pi
->num_syscall_handlers
= 0;
1979 pi
->syscall_handlers
= NULL
;
1981 prfillset (&sctl
.sigset
);
1982 notice_signals (pi
, &sctl
);
1983 prfillset (&fctl
.fltset
);
1984 prdelset (&fctl
.fltset
, FLTPAGE
);
1985 #else /* UNIXWARE */
1986 memset ((char *) &pi
->prrun
, 0, sizeof (pi
->prrun
));
1987 prfillset (&pi
->prrun
.pr_trace
);
1988 procfs_notice_signals (pid
);
1989 prfillset (&pi
->prrun
.pr_fault
);
1990 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
1991 #ifdef PROCFS_DONT_TRACE_FAULTS
1992 premptyset (&pi
->prrun
.pr_fault
);
1994 #endif /* UNIXWARE */
1996 if (!procfs_read_status (pi
))
1997 proc_init_failed (pi
, "procfs_read_status failed");
1999 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2000 already stopped, even if they all have PR_ASYNC set. */
2003 if (!(pi
->prstatus
.pr_flags
& PR_STOPPED
))
2005 if (!procfs_write_pcwstop (pi
))
2006 proc_init_failed (pi
, "procfs_write_pcwstop failed");
2008 #ifdef PROCFS_USE_READ_WRITE
2009 fctl
.cmd
= PCSFAULT
;
2010 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
2011 proc_init_failed (pi
, "PCSFAULT failed");
2013 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
) < 0)
2014 proc_init_failed (pi
, "PIOCSFAULT failed");
2024 procfs_exit_handler - handle entry into the _exit syscall
2028 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2032 This routine is called when an inferior process enters the _exit()
2033 system call. It continues the process, and then collects the exit
2034 status and pid which are returned in *statvalp and *rtnvalp. After
2035 that it returns non-zero to indicate that procfs_wait should wake up.
2038 There is probably a better way to do this.
2043 procfs_exit_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2044 struct procinfo
*pi
;
2050 pi
->prrun
.pr_flags
= PRCFAULT
;
2052 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2053 perror_with_name (pi
->pathname
);
2055 *rtnvalp
= wait (statvalp
);
2066 procfs_exec_handler - handle exit from the exec family of syscalls
2070 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2074 This routine is called when an inferior process is about to finish any
2075 of the exec() family of system calls. It pretends that we got a
2076 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2077 to tell procfs_wait to wake up.
2080 This need for compatibility with ptrace is questionable. In the
2081 future, it shouldn't be necessary.
2086 procfs_exec_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2087 struct procinfo
*pi
;
2093 *statvalp
= (SIGTRAP
<< 8) | 0177;
2098 #if defined(SYS_sproc) && !defined(UNIXWARE)
2099 /* IRIX lwp creation system call */
2105 procfs_sproc_handler - handle exit from the sproc syscall
2109 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2113 This routine is called when an inferior process is about to finish an
2114 sproc() system call. This is the system call that IRIX uses to create
2115 a lightweight process. When the target process gets this event, we can
2116 look at rval1 to find the new child processes ID, and create a new
2117 procinfo struct from that.
2119 After that, it pretends that we got a SIGTRAP, and returns non-zero
2120 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2121 woken up, sees the new process and continues it.
2124 We actually never see the child exiting from sproc because we will
2125 shortly stop the child with PIOCSTOP, which is then registered as the
2130 procfs_sproc_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2131 struct procinfo
*pi
;
2137 /* We've just detected the completion of an sproc system call. Now we need to
2138 setup a procinfo struct for this thread, and notify the thread system of the
2141 /* If sproc failed, then nothing interesting happened. Continue the process
2142 and go back to sleep. */
2144 if (pi
->prstatus
.pr_errno
!= 0)
2146 pi
->prrun
.pr_flags
&= PRSTEP
;
2147 pi
->prrun
.pr_flags
|= PRCFAULT
;
2149 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2150 perror_with_name (pi
->pathname
);
2155 /* At this point, the new thread is stopped at it's first instruction, and
2156 the parent is stopped at the exit from sproc. */
2158 /* Notify the caller of the arrival of a new thread. */
2159 create_procinfo (pi
->prstatus
.pr_rval1
);
2161 *rtnvalp
= pi
->prstatus
.pr_rval1
;
2162 *statvalp
= (SIGTRAP
<< 8) | 0177;
2171 procfs_fork_handler - handle exit from the fork syscall
2175 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2179 This routine is called when an inferior process is about to finish a
2180 fork() system call. We will open up the new process, and then close
2181 it, which releases it from the clutches of the debugger.
2183 After that, we continue the target process as though nothing had
2187 This is necessary for IRIX because we have to set PR_FORK in order
2188 to catch the creation of lwps (via sproc()). When an actual fork
2189 occurs, it becomes necessary to reset the forks debugger flags and
2190 continue it because we can't hack multiple processes yet.
2194 procfs_fork_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2195 struct procinfo
*pi
;
2201 struct procinfo
*pitemp
;
2203 /* At this point, we've detected the completion of a fork (or vfork) call in
2204 our child. The grandchild is also stopped because we set inherit-on-fork
2205 earlier. (Note that nobody has the grandchilds' /proc file open at this
2206 point.) We will release the grandchild from the debugger by opening it's
2207 /proc file and then closing it. Since run-on-last-close is set, the
2208 grandchild continues on its' merry way. */
2211 pitemp
= create_procinfo (pi
->prstatus
.pr_rval1
);
2213 close_proc_file (pitemp
);
2215 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2216 perror_with_name (pi
->pathname
);
2220 #endif /* SYS_sproc && !UNIXWARE */
2226 procfs_init_inferior - initialize target vector and access to a
2231 int procfs_init_inferior (int pid)
2235 When gdb starts an inferior, this function is called in the parent
2236 process immediately after the fork. It waits for the child to stop
2237 on the return from the exec system call (the child itself takes care
2238 of ensuring that this is set up), then sets up the set of signals
2239 and faults that are to be traced. Returns the pid, which may have had
2240 the thread-id added to it.
2244 If proc_init_failed ever gets called, control returns to the command
2245 processing loop via the standard error handling code.
2250 procfs_init_inferior (pid
)
2253 struct procinfo
*pip
;
2255 push_target (&procfs_ops
);
2257 pip
= create_procinfo (pid
);
2260 procfs_set_syscall_trap (pip
, SYS_exit
, PROCFS_SYSCALL_ENTRY
,
2261 procfs_exit_handler
);
2264 procfs_set_syscall_trap (pip
, SYS_exec
, PROCFS_SYSCALL_EXIT
,
2265 procfs_exec_handler
);
2268 procfs_set_syscall_trap (pip
, SYS_execv
, PROCFS_SYSCALL_EXIT
,
2269 procfs_exec_handler
);
2272 procfs_set_syscall_trap (pip
, SYS_execve
, PROCFS_SYSCALL_EXIT
,
2273 procfs_exec_handler
);
2275 #endif /* PIOCSSPCACT */
2277 /* Setup traps on exit from sproc() */
2280 procfs_set_syscall_trap (pip
, SYS_sproc
, PROCFS_SYSCALL_EXIT
,
2281 procfs_sproc_handler
);
2282 procfs_set_syscall_trap (pip
, SYS_fork
, PROCFS_SYSCALL_EXIT
,
2283 procfs_fork_handler
);
2285 procfs_set_syscall_trap (pip
, SYS_vfork
, PROCFS_SYSCALL_EXIT
,
2286 procfs_fork_handler
);
2288 /* Turn on inherit-on-fork flag so that all children of the target process
2289 start with tracing flags set. This allows us to trap lwp creation. Note
2290 that we also have to trap on fork and vfork in order to disable all tracing
2291 in the targets child processes. */
2293 modify_inherit_on_fork_flag (pip
->ctl_fd
, 1);
2296 #ifdef SYS_lwp_create
2297 procfs_set_syscall_trap (pip
, SYS_lwp_create
, PROCFS_SYSCALL_EXIT
,
2298 procfs_lwp_creation_handler
);
2301 /* create_procinfo may change the pid, so we have to update inferior_pid
2302 here before calling other gdb routines that need the right pid. */
2307 add_thread (pip
-> pid
); /* Setup initial thread */
2309 #ifdef START_INFERIOR_TRAPS_EXPECTED
2310 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
2312 /* One trap to exec the shell, one to exec the program being debugged. */
2313 startup_inferior (2);
2323 procfs_notice_signals
2327 static void procfs_notice_signals (int pid);
2331 When the user changes the state of gdb's signal handling via the
2332 "handle" command, this function gets called to see if any change
2333 in the /proc interface is required. It is also called internally
2334 by other /proc interface functions to initialize the state of
2335 the traced signal set.
2337 One thing it does is that signals for which the state is "nostop",
2338 "noprint", and "pass", have their trace bits reset in the pr_trace
2339 field, so that they are no longer traced. This allows them to be
2340 delivered directly to the inferior without the debugger ever being
2345 procfs_notice_signals (pid
)
2348 struct procinfo
*pi
;
2349 struct sig_ctl sctl
;
2351 pi
= find_procinfo (pid
, 0);
2354 premptyset (&sctl
.sigset
);
2356 sctl
.sigset
= pi
->prrun
.pr_trace
;
2359 notice_signals (pi
, &sctl
);
2362 pi
->prrun
.pr_trace
= sctl
.sigset
;
2367 notice_signals (pi
, sctl
)
2368 struct procinfo
*pi
;
2369 struct sig_ctl
*sctl
;
2373 for (signo
= 0; signo
< NSIG
; signo
++)
2375 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
2376 signal_print_state (target_signal_from_host (signo
)) == 0 &&
2377 signal_pass_state (target_signal_from_host (signo
)) == 1)
2379 prdelset (&sctl
->sigset
, signo
);
2383 praddset (&sctl
->sigset
, signo
);
2386 #ifdef PROCFS_USE_READ_WRITE
2387 sctl
->cmd
= PCSTRACE
;
2388 if (write (pi
->ctl_fd
, (char *) sctl
, sizeof (struct sig_ctl
)) < 0)
2390 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &sctl
->sigset
))
2393 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2401 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2405 void proc_set_exec_trap (void)
2409 This function is called in the child process when starting up
2410 an inferior, prior to doing the exec of the actual inferior.
2411 It sets the child process's exitset to make exit from the exec
2412 system call an event of interest to stop on, and then simply
2413 returns. The child does the exec, the system call returns, and
2414 the child stops at the first instruction, ready for the gdb
2415 parent process to take control of it.
2419 We need to use all local variables since the child may be sharing
2420 it's data space with the parent, if vfork was used rather than
2423 Also note that we want to turn off the inherit-on-fork flag in
2424 the child process so that any grand-children start with all
2425 tracing flags cleared.
2429 proc_set_exec_trap ()
2431 struct sys_ctl exitset
;
2432 struct sys_ctl entryset
;
2433 char procname
[MAX_PROC_NAME_SIZE
];
2436 sprintf (procname
, CTL_PROC_NAME_FMT
, getpid ());
2438 if ((fd
= open (procname
, O_WRONLY
)) < 0)
2440 if ((fd
= open (procname
, O_RDWR
)) < 0)
2444 gdb_flush (gdb_stderr
);
2447 premptyset (&exitset
.sysset
);
2448 premptyset (&entryset
.sysset
);
2451 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2452 exits from exec system calls because of the user level loader.
2453 Starting with OSF/1-4.0, tracing the entry to the exit system
2454 call no longer works. So we have to use PRFS_STOPTERM to trace
2455 termination of the inferior. */
2459 if (ioctl (fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
2462 gdb_flush (gdb_stderr
);
2465 prfs_flags
|= PRFS_STOPEXEC
| PRFS_STOPTERM
;
2466 if (ioctl (fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
2469 gdb_flush (gdb_stderr
);
2473 #else /* PIOCSSPCACT */
2475 Not all systems with /proc have all the exec* syscalls with the same
2476 names. On the SGI, for example, there is no SYS_exec, but there
2477 *is* a SYS_execv. So, we try to account for that. */
2480 praddset (&exitset
.sysset
, SYS_exec
);
2483 praddset (&exitset
.sysset
, SYS_execve
);
2486 praddset (&exitset
.sysset
, SYS_execv
);
2489 #ifdef PROCFS_USE_READ_WRITE
2490 exitset
.cmd
= PCSEXIT
;
2491 if (write (fd
, (char *) &exitset
, sizeof (struct sys_ctl
)) < 0)
2493 if (ioctl (fd
, PIOCSEXIT
, &exitset
.sysset
) < 0)
2497 gdb_flush (gdb_stderr
);
2501 praddset (&entryset
.sysset
, SYS_exit
);
2503 #ifdef PROCFS_USE_READ_WRITE
2504 entryset
.cmd
= PCSENTRY
;
2505 if (write (fd
, (char *) &entryset
, sizeof (struct sys_ctl
)) < 0)
2507 if (ioctl (fd
, PIOCSENTRY
, &entryset
.sysset
) < 0)
2511 gdb_flush (gdb_stderr
);
2514 #endif /* PIOCSSPCACT */
2516 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2517 start with tracing flags cleared. */
2519 modify_inherit_on_fork_flag (fd
, 0);
2521 /* Turn on run-on-last-close flag so that this process will not hang
2522 if GDB goes away for some reason. */
2524 modify_run_on_last_close_flag (fd
, 1);
2529 struct proc_ctl pctl
;
2531 /* Solaris needs this to make procfs treat all threads seperately. Without
2532 this, all threads halt whenever something happens to any thread. Since
2533 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2535 pr_flags
= PR_ASYNC
;
2536 #ifdef PROCFS_USE_READ_WRITE
2538 pctl
.data
= PR_FORK
|PR_ASYNC
;
2539 write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
));
2541 ioctl (fd
, PIOCSET
, &pr_flags
);
2544 #endif /* PR_ASYNC */
2551 proc_iterate_over_mappings -- call function for every mapped space
2555 int proc_iterate_over_mappings (int (*func)())
2559 Given a pointer to a function, call that function for every
2560 mapped address space, passing it an open file descriptor for
2561 the file corresponding to that mapped address space (if any)
2562 and the base address of the mapped space. Quit when we hit
2563 the end of the mappings or the function returns nonzero.
2568 proc_iterate_over_mappings (func
)
2569 int (*func
) PARAMS ((int, CORE_ADDR
));
2576 struct procinfo
*pi
;
2579 pi
= current_procinfo
;
2581 if (fstat (pi
->map_fd
, &sbuf
) < 0)
2584 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
2585 prmaps
= (prmap_t
*) alloca (nmap
* sizeof(prmap_t
));
2586 if ((lseek (pi
->map_fd
, 0, SEEK_SET
) == 0) &&
2587 (read (pi
->map_fd
, (char *) prmaps
, nmap
* sizeof (prmap_t
)) ==
2588 (nmap
* sizeof (prmap_t
))))
2591 for (prmap
= prmaps
; i
< nmap
&& funcstat
== 0; ++prmap
, ++i
)
2593 char name
[sizeof ("/proc/1234567890/object") +
2594 sizeof (prmap
->pr_mapname
)];
2595 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, prmap
->pr_mapname
);
2596 if ((fd
= open (name
, O_RDONLY
)) == -1)
2601 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
->pr_vaddr
);
2607 #else /* UNIXWARE */
2609 proc_iterate_over_mappings (func
)
2610 int (*func
) PARAMS ((int, CORE_ADDR
));
2615 struct prmap
*prmaps
;
2616 struct prmap
*prmap
;
2617 struct procinfo
*pi
;
2619 pi
= current_procinfo
;
2621 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2623 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2624 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2626 for (prmap
= prmaps
; prmap
-> pr_size
&& funcstat
== 0; ++prmap
)
2628 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
-> pr_vaddr
, 0);
2629 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
-> pr_vaddr
);
2636 #endif /* UNIXWARE */
2638 #if 0 /* Currently unused */
2643 proc_base_address -- find base address for segment containing address
2647 CORE_ADDR proc_base_address (CORE_ADDR addr)
2651 Given an address of a location in the inferior, find and return
2652 the base address of the mapped segment containing that address.
2654 This is used for example, by the shared library support code,
2655 where we have the pc value for some location in the shared library
2656 where we are stopped, and need to know the base address of the
2657 segment containing that address.
2661 proc_base_address (addr
)
2665 struct prmap
*prmaps
;
2666 struct prmap
*prmap
;
2667 CORE_ADDR baseaddr
= 0;
2668 struct procinfo
*pi
;
2670 pi
= current_procinfo
;
2672 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2674 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2675 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2677 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
2679 if ((prmap
-> pr_vaddr
<= (caddr_t
) addr
) &&
2680 (prmap
-> pr_vaddr
+ prmap
-> pr_size
> (caddr_t
) addr
))
2682 baseaddr
= (CORE_ADDR
) prmap
-> pr_vaddr
;
2697 proc_address_to_fd -- return open fd for file mapped to address
2701 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2705 Given an address in the current inferior's address space, use the
2706 /proc interface to find an open file descriptor for the file that
2707 this address was mapped in from. Return -1 if there is no current
2708 inferior. Print a warning message if there is an inferior but
2709 the address corresponds to no file (IE a bogus address).
2714 proc_address_to_fd (pi
, addr
, complain
)
2715 struct procinfo
*pi
;
2721 if ((fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, (caddr_t
*) &addr
)) < 0)
2725 print_sys_errmsg (pi
->pathname
, errno
);
2726 warning ("can't find mapped file for address 0x%x", addr
);
2733 /* Attach to process PID, then initialize for debugging it
2734 and wait for the trace-trap that results from attaching. */
2737 procfs_attach (args
, from_tty
)
2745 error_no_arg ("process-id to attach");
2749 if (pid
== getpid()) /* Trying to masturbate? */
2750 error ("I refuse to debug myself!");
2754 exec_file
= (char *) get_exec_file (0);
2757 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
2759 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid
));
2761 gdb_flush (gdb_stdout
);
2764 inferior_pid
= pid
= do_attach (pid
);
2765 push_target (&procfs_ops
);
2769 /* Take a program previously attached to and detaches it.
2770 The program resumes execution and will no longer stop
2771 on signals, etc. We'd better not have left any breakpoints
2772 in the program or it'll die when it hits one. For this
2773 to work, it may be necessary for the process to have been
2774 previously attached. It *might* work if the program was
2775 started via the normal ptrace (PTRACE_TRACEME). */
2778 procfs_detach (args
, from_tty
)
2786 char *exec_file
= get_exec_file (0);
2789 printf_unfiltered ("Detaching from program: %s %s\n",
2790 exec_file
, target_pid_to_str (inferior_pid
));
2791 gdb_flush (gdb_stdout
);
2794 siggnal
= atoi (args
);
2796 do_detach (siggnal
);
2798 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
2801 /* Get ready to modify the registers array. On machines which store
2802 individual registers, this doesn't need to do anything. On machines
2803 which store all the registers in one fell swoop, this makes sure
2804 that registers contains all the registers from the program being
2808 procfs_prepare_to_store ()
2810 #ifdef CHILD_PREPARE_TO_STORE
2811 CHILD_PREPARE_TO_STORE ();
2815 /* Print status information about what we're accessing. */
2818 procfs_files_info (ignore
)
2819 struct target_ops
*ignore
;
2821 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
2822 attach_flag
? "attached": "child", target_pid_to_str (inferior_pid
));
2827 procfs_open (arg
, from_tty
)
2831 error ("Use the \"run\" command to start a Unix child process.");
2838 do_attach -- attach to an already existing process
2842 int do_attach (int pid)
2846 Attach to an already existing process with the specified process
2847 id. If the process is not already stopped, query whether to
2852 The option of stopping at attach time is specific to the /proc
2853 versions of gdb. Versions using ptrace force the attachee
2854 to stop. (I have changed this version to do so, too. All you
2855 have to do is "continue" to make it go on. -- gnu@cygnus.com)
2863 struct procinfo
*pi
;
2864 struct sig_ctl sctl
;
2865 struct flt_ctl fctl
;
2867 pi
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
2869 if (!open_proc_file (pid
, pi
, O_RDWR
, 1))
2872 perror_with_name (pi
->pathname
);
2878 /* Add new process to process info list */
2880 pi
->next
= procinfo_list
;
2883 add_fd (pi
); /* Add to list for poll/select */
2885 /* Get current status of process and if it is not already stopped,
2886 then stop it. Remember whether or not it was stopped when we first
2888 if (!procfs_read_status (pi
))
2890 print_sys_errmsg (pi
->pathname
, errno
);
2891 close_proc_file (pi
);
2892 error ("procfs_read_status failed");
2895 if (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
2897 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
2900 pi
->was_stopped
= 1;
2904 pi
->was_stopped
= 0;
2905 if (1 || query ("Process is currently running, stop it? "))
2908 /* Make it run again when we close it. */
2910 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
2912 #ifdef PROCFS_USE_READ_WRITE
2914 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
2916 if (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
2919 print_sys_errmsg (pi
->pathname
, errno
);
2920 close_proc_file (pi
);
2921 error ("PIOCSTOP failed");
2924 if (!procfs_read_status (pi
))
2926 print_sys_errmsg (pi
->pathname
, errno
);
2927 close_proc_file (pi
);
2928 error ("procfs_read_status failed");
2931 pi
->nopass_next_sigstop
= 1;
2935 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid
));
2939 /* Remember some things about the inferior that we will, or might, change
2940 so that we can restore them when we detach. */
2941 #ifdef PROCFS_USE_READ_WRITE
2942 memcpy ((char *) &pi
->saved_trace
.sigset
,
2943 (char *) &pi
->prstatus
.pr_sigtrace
, sizeof (sigset_t
));
2944 memcpy ((char *) &pi
->saved_fltset
.fltset
,
2945 (char *) &pi
->prstatus
.pr_flttrace
, sizeof (fltset_t
));
2946 memcpy ((char *) &pi
->saved_entryset
.sysset
,
2947 (char *) &pi
->prstatus
.pr_sysentry
, sizeof (sysset_t
));
2948 memcpy ((char *) &pi
->saved_exitset
.sysset
,
2949 (char *) &pi
->prstatus
.pr_sysexit
, sizeof (sysset_t
));
2951 /* Set up trace and fault sets, as gdb expects them. */
2953 prfillset (&sctl
.sigset
);
2954 notice_signals (pi
, &sctl
);
2955 prfillset (&fctl
.fltset
);
2956 prdelset (&fctl
.fltset
, FLTPAGE
);
2958 fctl
.cmd
= PCSFAULT
;
2959 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
2960 print_sys_errmsg ("PCSFAULT failed", errno
);
2961 #else /* PROCFS_USE_READ_WRITE */
2962 ioctl (pi
->ctl_fd
, PIOCGTRACE
, &pi
->saved_trace
.sigset
);
2963 ioctl (pi
->ctl_fd
, PIOCGHOLD
, &pi
->saved_sighold
.sigset
);
2964 ioctl (pi
->ctl_fd
, PIOCGFAULT
, &pi
->saved_fltset
.fltset
);
2965 ioctl (pi
->ctl_fd
, PIOCGENTRY
, &pi
->saved_entryset
.sysset
);
2966 ioctl (pi
->ctl_fd
, PIOCGEXIT
, &pi
->saved_exitset
.sysset
);
2968 /* Set up trace and fault sets, as gdb expects them. */
2970 memset (&pi
->prrun
, 0, sizeof (pi
->prrun
));
2971 prfillset (&pi
->prrun
.pr_trace
);
2972 procfs_notice_signals (pid
);
2973 prfillset (&pi
->prrun
.pr_fault
);
2974 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
2976 #ifdef PROCFS_DONT_TRACE_FAULTS
2977 premptyset (&pi
->prrun
.pr_fault
);
2980 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
2982 print_sys_errmsg ("PIOCSFAULT failed", errno
);
2984 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
2986 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2988 #endif /* PROCFS_USE_READ_WRITE */
2997 do_detach -- detach from an attached-to process
3001 void do_detach (int signal)
3005 Detach from the current attachee.
3007 If signal is non-zero, the attachee is started running again and sent
3008 the specified signal.
3010 If signal is zero and the attachee was not already stopped when we
3011 attached to it, then we make it runnable again when we detach.
3013 Otherwise, we query whether or not to make the attachee runnable
3014 again, since we may simply want to leave it in the state it was in
3017 We report any problems, but do not consider them errors, since we
3018 MUST detach even if some things don't seem to go right. This may not
3019 be the ideal situation. (FIXME).
3026 struct procinfo
*pi
;
3028 pi
= current_procinfo
;
3032 set_proc_siginfo (pi
, signal
);
3034 #ifdef PROCFS_USE_READ_WRITE
3035 pi
->saved_exitset
.cmd
= PCSEXIT
;
3036 if (write (pi
->ctl_fd
, (char *) &pi
->saved_exitset
,
3037 sizeof (struct sys_ctl
)) < 0)
3039 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &pi
->saved_exitset
.sysset
) < 0)
3042 print_sys_errmsg (pi
->pathname
, errno
);
3043 printf_unfiltered ("PIOCSEXIT failed.\n");
3045 #ifdef PROCFS_USE_READ_WRITE
3046 pi
->saved_entryset
.cmd
= PCSENTRY
;
3047 if (write (pi
->ctl_fd
, (char *) &pi
->saved_entryset
,
3048 sizeof (struct sys_ctl
)) < 0)
3050 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &pi
->saved_entryset
.sysset
) < 0)
3053 print_sys_errmsg (pi
->pathname
, errno
);
3054 printf_unfiltered ("PIOCSENTRY failed.\n");
3056 #ifdef PROCFS_USE_READ_WRITE
3057 pi
->saved_trace
.cmd
= PCSTRACE
;
3058 if (write (pi
->ctl_fd
, (char *) &pi
->saved_trace
,
3059 sizeof (struct sig_ctl
)) < 0)
3061 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->saved_trace
.sigset
) < 0)
3064 print_sys_errmsg (pi
->pathname
, errno
);
3065 printf_unfiltered ("PIOCSTRACE failed.\n");
3068 if (ioctl (pi
->ctl_fd
, PIOCSHOLD
, &pi
->saved_sighold
.sigset
) < 0)
3070 print_sys_errmsg (pi
->pathname
, errno
);
3071 printf_unfiltered ("PIOSCHOLD failed.\n");
3074 #ifdef PROCFS_USE_READ_WRITE
3075 pi
->saved_fltset
.cmd
= PCSFAULT
;
3076 if (write (pi
->ctl_fd
, (char *) &pi
->saved_fltset
,
3077 sizeof (struct flt_ctl
)) < 0)
3079 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->saved_fltset
.fltset
) < 0)
3082 print_sys_errmsg (pi
->pathname
, errno
);
3083 printf_unfiltered ("PIOCSFAULT failed.\n");
3085 if (!procfs_read_status (pi
))
3087 print_sys_errmsg (pi
->pathname
, errno
);
3088 printf_unfiltered ("procfs_read_status failed.\n");
3093 if (signal
|| (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3095 if (signal
|| (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3099 struct proc_ctl pctl
;
3101 if (signal
|| !pi
->was_stopped
||
3102 query ("Was stopped when attached, make it runnable again? "))
3104 /* Clear any pending signal if we want to detach without
3107 set_proc_siginfo (pi
, signal
);
3109 /* Clear any fault that might have stopped it. */
3110 #ifdef PROCFS_USE_READ_WRITE
3112 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3114 if (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0))
3117 print_sys_errmsg (pi
->pathname
, errno
);
3118 printf_unfiltered ("PIOCCFAULT failed.\n");
3121 /* Make it run again when we close it. */
3123 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3127 close_proc_file (pi
);
3131 /* emulate wait() as much as possible.
3132 Wait for child to do something. Return pid of child, or -1 in case
3133 of error; store status in *OURSTATUS.
3135 Not sure why we can't
3136 just use wait(), but it seems to have problems when applied to a
3137 process being controlled with the /proc interface.
3139 We have a race problem here with no obvious solution. We need to let
3140 the inferior run until it stops on an event of interest, which means
3141 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3142 ioctl if the process is already stopped on something that is not an
3143 event of interest, or the call will hang indefinitely. Thus we first
3144 use PIOCSTATUS to see if the process is not stopped. If not, then we
3145 use PIOCWSTOP. But during the window between the two, if the process
3146 stops for any reason that is not an event of interest (such as a job
3147 control signal) then gdb will hang. One possible workaround is to set
3148 an alarm to wake up every minute of so and check to see if the process
3149 is still running, and if so, then reissue the PIOCWSTOP. But this is
3150 a real kludge, so has not been implemented. FIXME: investigate
3153 FIXME: Investigate why wait() seems to have problems with programs
3154 being control by /proc routines. */
3157 procfs_wait (pid
, ourstatus
)
3159 struct target_waitstatus
*ourstatus
;
3166 struct procinfo
*pi
;
3167 struct proc_ctl pctl
;
3170 if (pid
!= -1) /* Non-specific process? */
3173 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3188 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3189 if (pi
->pid
== pid
&& pi
->had_event
)
3193 if (!pi
&& !checkerr
)
3197 if (!checkerr
&& !(pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3199 if (!checkerr
&& !(pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3202 if (!procfs_write_pcwstop (pi
))
3209 if (errno
== ENOENT
)
3211 rtnval
= wait (&statval
);
3212 if (rtnval
!= inferior_pid
)
3214 print_sys_errmsg (pi
->pathname
, errno
);
3215 error ("procfs_write_pcwstop, wait failed, returned %d", rtnval
);
3221 print_sys_errmsg (pi
->pathname
, errno
);
3222 error ("PIOCSTATUS or PIOCWSTOP failed.");
3226 else if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3229 rtnval
= pi
->prstatus
.pr_pid
;
3230 why
= pi
->prstatus
.pr_lwp
.pr_why
;
3231 what
= pi
->prstatus
.pr_lwp
.pr_what
;
3234 why
= pi
->prstatus
.pr_why
;
3235 what
= pi
->prstatus
.pr_what
;
3241 statval
= (what
<< 8) | 0177;
3247 int found_handler
= 0;
3249 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
3250 if (pi
->syscall_handlers
[i
].syscall_num
== what
)
3253 if (!pi
->syscall_handlers
[i
].func (pi
, what
, why
,
3261 if (why
== PR_SYSENTRY
)
3262 error ("PR_SYSENTRY, unhandled system call %d", what
);
3264 error ("PR_SYSEXIT, unhandled system call %d", what
);
3268 case (short)PR_DEAD
:
3272 /* The inferior process is about to terminate.
3273 pr_what has the process's exit or return value.
3274 A PIOCRUN ioctl must be used to restart the process so it
3275 can finish exiting. */
3277 #ifdef PROCFS_USE_READ_WRITE
3279 pctl
.data
= PRCFAULT
;
3280 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
3282 pi
->prrun
.pr_flags
= PRCFAULT
;
3283 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
3285 perror_with_name (pi
->pathname
);
3287 if (wait (&dummy
) < 0)
3289 statval
= pi
->prstatus
.pr_what
;
3294 statval
= (SIGSTOP
<< 8) | 0177;
3297 statval
= (what
<< 8) | 0177;
3304 statval
= (SIGTRAP
<< 8) | 0177;
3309 statval
= (SIGTRAP
<< 8) | 0177;
3312 #ifndef FAULTED_USE_SIGINFO
3313 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3314 Solaris fills in si_signo. I'm not sure about others. */
3317 statval
= (SIGILL
<< 8) | 0177;
3321 statval
= (SIGTRAP
<< 8) | 0177;
3326 statval
= (SIGSEGV
<< 8) | 0177;
3331 statval
= (SIGFPE
<< 8) | 0177;
3333 case FLTPAGE
: /* Recoverable page fault */
3334 #endif /* not FAULTED_USE_SIGINFO */
3336 /* Use the signal which the kernel assigns. This is better than
3337 trying to second-guess it from the fault. In fact, I suspect
3338 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3340 statval
= ((pi
->prstatus
.pr_lwp
.pr_info
.si_signo
) << 8) | 0177;
3342 statval
= ((pi
->prstatus
.pr_info
.si_signo
) << 8) | 0177;
3348 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
3350 /* Stop all the other threads when any of them stops. */
3353 struct procinfo
*procinfo
;
3355 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
3357 if (!procinfo
->had_event
)
3359 #ifdef PROCFS_USE_READ_WRITE
3361 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3363 print_sys_errmsg (procinfo
->pathname
, errno
);
3364 error ("PCSTOP failed");
3367 /* A bug in Solaris (2.5) causes us to hang when trying to
3368 stop a stopped process. So, we have to check first in
3369 order to avoid the hang. */
3370 if (!procfs_read_status (procinfo
))
3372 print_sys_errmsg (procinfo
->pathname
, errno
);
3373 error ("procfs_read_status failed");
3376 if (!(procinfo
->prstatus
.pr_flags
& PR_STOPPED
))
3377 if (ioctl (procinfo
->ctl_fd
, PIOCSTOP
, &procinfo
->prstatus
) < 0)
3379 print_sys_errmsg (procinfo
->pathname
, errno
);
3380 error ("PIOCSTOP failed");
3389 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3390 pi
->prstatus
.pr_flags
);
3393 store_waitstatus (ourstatus
, statval
);
3395 if (rtnval
== -1) /* No more children to wait for */
3397 fprintf_unfiltered (gdb_stderr
, "Child process unexpectedly missing.\n");
3398 /* Claim it exited with unknown signal. */
3399 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3400 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
3404 pi
->had_event
= 0; /* Indicate that we've seen this one */
3412 set_proc_siginfo - set a process's current signal info
3416 void set_proc_siginfo (struct procinfo *pip, int signo);
3420 Given a pointer to a process info struct in PIP and a signal number
3421 in SIGNO, set the process's current signal and its associated signal
3422 information. The signal will be delivered to the process immediately
3423 after execution is resumed, even if it is being held. In addition,
3424 this particular delivery will not cause another PR_SIGNALLED stop
3425 even if the signal is being traced.
3427 If we are not delivering the same signal that the prstatus siginfo
3428 struct contains information about, then synthesize a siginfo struct
3429 to match the signal we are doing to deliver, make it of the type
3430 "generated by a user process", and send this synthesized copy. When
3431 used to set the inferior's signal state, this will be required if we
3432 are not currently stopped because of a traced signal, or if we decide
3433 to continue with a different signal.
3435 Note that when continuing the inferior from a stop due to receipt
3436 of a traced signal, we either have set PRCSIG to clear the existing
3437 signal, or we have to call this function to do a PIOCSSIG with either
3438 the existing siginfo struct from pr_info, or one we have synthesized
3439 appropriately for the signal we want to deliver. Otherwise if the
3440 signal is still being traced, the inferior will immediately stop
3443 See siginfo(5) for more details.
3447 set_proc_siginfo (pip
, signo
)
3448 struct procinfo
*pip
;
3451 struct siginfo newsiginfo
;
3452 struct siginfo
*sip
;
3453 struct sigi_ctl sictl
;
3455 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3456 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3457 receives a PIOCSSIG with a signal identical to the current signal,
3458 it messes up the current signal. Work around the kernel bug. */
3460 if (signo
== pip
-> prstatus
.pr_lwp
.pr_cursig
)
3462 if (signo
== pip
-> prstatus
.pr_cursig
)
3468 if (signo
== pip
->prstatus
.pr_lwp
.pr_info
.si_signo
)
3470 memcpy ((char *) &sictl
.siginfo
, (char *) &pip
->prstatus
.pr_lwp
.pr_info
,
3471 sizeof (siginfo_t
));
3474 if (signo
== pip
-> prstatus
.pr_info
.si_signo
)
3476 sip
= &pip
-> prstatus
.pr_info
;
3482 siginfo_t
*sip
= &sictl
.siginfo
;
3483 memset ((char *) sip
, 0, sizeof (siginfo_t
));
3485 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
3488 sip
-> si_signo
= signo
;
3490 sip
-> si_errno
= 0;
3491 sip
-> si_pid
= getpid ();
3492 sip
-> si_uid
= getuid ();
3494 #ifdef PROCFS_USE_READ_WRITE
3496 if (write (pip
->ctl_fd
, (char *) &sictl
, sizeof (struct sigi_ctl
)) < 0)
3498 if (ioctl (pip
->ctl_fd
, PIOCSSIG
, sip
) < 0)
3501 print_sys_errmsg (pip
-> pathname
, errno
);
3502 warning ("PIOCSSIG failed");
3506 /* Resume execution of process PID. If STEP is nozero, then
3507 just single step it. If SIGNAL is nonzero, restart it with that
3508 signal activated. */
3511 procfs_resume (pid
, step
, signo
)
3514 enum target_signal signo
;
3517 struct procinfo
*pi
, *procinfo
;
3518 struct proc_ctl pctl
;
3520 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
3525 pctl
.data
= PRCFAULT
;
3527 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
3531 /* It should not be necessary. If the user explicitly changes the value,
3532 value_assign calls write_register_bytes, which writes it. */
3533 /* It may not be absolutely necessary to specify the PC value for
3534 restarting, but to be safe we use the value that gdb considers
3535 to be current. One case where this might be necessary is if the
3536 user explicitly changes the PC value that gdb considers to be
3537 current. FIXME: Investigate if this is necessary or not. */
3539 #ifdef PRSVADDR_BROKEN
3540 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3541 place to put nPC. In fact, if you use this, nPC seems to be set to some
3542 random garbage. We have to rely on the fact that PC and nPC have been
3543 written previously via PIOCSREG during a register flush. */
3545 pi
->prrun
.pr_vaddr
= (caddr_t
) *(int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
3546 pi
->prrun
.pr_flags
!= PRSVADDR
;
3550 if (signo
== TARGET_SIGNAL_STOP
&& pi
->nopass_next_sigstop
)
3551 /* When attaching to a child process, if we forced it to stop with
3552 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3553 Upon resuming the first time after such a stop, we explicitly
3554 inhibit sending it another SIGSTOP, which would be the normal
3555 result of default signal handling. One potential drawback to
3556 this is that we will also ignore any attempt to by the user
3557 to explicitly continue after the attach with a SIGSTOP. Ultimately
3558 this problem should be dealt with by making the routines that
3559 deal with the inferior a little smarter, and possibly even allow
3560 an inferior to continue running at the same time as gdb. (FIXME?) */
3562 else if (signo
== TARGET_SIGNAL_TSTP
3564 && pi
->prstatus
.pr_lwp
.pr_cursig
== SIGTSTP
3565 && pi
->prstatus
.pr_lwp
.pr_action
.sa_handler
== SIG_DFL
)
3567 && pi
->prstatus
.pr_cursig
== SIGTSTP
3568 && pi
->prstatus
.pr_action
.sa_handler
== SIG_DFL
)
3571 /* We are about to pass the inferior a SIGTSTP whose action is
3572 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3573 (notifying the parent via wait()), and then keep going from the
3574 same place when the parent is ready for you to keep going. So
3575 under the debugger, it should do nothing (as if the program had
3576 been stopped and then later resumed. Under ptrace, this
3577 happens for us, but under /proc, the system obligingly stops
3578 the process, and wait_for_inferior would have no way of
3579 distinguishing that type of stop (which indicates that we
3580 should just start it again), with a stop due to the pr_trace
3581 field of the prrun_t struct.
3583 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3584 because the handler needs to get executed. */
3587 signal_to_pass
= target_signal_to_host (signo
);
3591 set_proc_siginfo (pi
, signal_to_pass
);
3596 pctl
.data
|= PRCSIG
;
3598 pi
->prrun
.pr_flags
|= PRCSIG
;
3601 pi
->nopass_next_sigstop
= 0;
3605 pctl
.data
|= PRSTEP
;
3607 pi
->prrun
.pr_flags
|= PRSTEP
;
3611 /* Don't try to start a process unless it's stopped on an
3612 `event of interest'. Doing so will cause errors. */
3614 #ifdef PROCFS_USE_READ_WRITE
3615 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
3617 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
3618 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
3621 perror_with_name (pi
->pathname
);
3627 /* Continue all the other threads that haven't had an event of
3631 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
3633 if (pi
!= procinfo
&& !procinfo
->had_event
)
3635 #ifdef PROCFS_USE_READ_WRITE
3636 pctl
.data
= PRCFAULT
| PRCSIG
;
3637 if (write (procinfo
->ctl_fd
, (char *) &pctl
,
3638 sizeof (struct proc_ctl
)) < 0)
3640 if (!procfs_read_status (procinfo
))
3642 fprintf_unfiltered(gdb_stderr
, "procfs_read_status failed, errno=%d\n", errno
);
3644 print_sys_errmsg (procinfo
->pathname
, errno
);
3645 error ("PCRUN failed");
3647 procfs_read_status (procinfo
);
3649 procinfo
->prrun
.pr_flags
&= PRSTEP
;
3650 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
3651 procfs_read_status (procinfo
);
3653 /* Don't try to start a process unless it's stopped on an
3654 `event of interest'. Doing so will cause errors. */
3656 if ((procinfo
->prstatus
.pr_flags
& PR_ISTOP
)
3657 && ioctl (procinfo
->ctl_fd
, PIOCRUN
, &procinfo
->prrun
) < 0)
3659 if (!procfs_read_status (procinfo
))
3661 fprintf_unfiltered(gdb_stderr
, "procfs_read_status failed, errno=%d\n", errno
);
3663 print_sys_errmsg (procinfo
->pathname
, errno
);
3664 error ("PIOCRUN failed");
3666 procfs_read_status (procinfo
);
3676 procfs_fetch_registers -- fetch current registers from inferior
3680 void procfs_fetch_registers (int regno)
3684 Read the current values of the inferior's registers, both the
3685 general register set and floating point registers (if supported)
3686 and update gdb's idea of their current values.
3691 procfs_fetch_registers (regno
)
3694 struct procinfo
*pi
;
3696 pi
= current_procinfo
;
3699 if (procfs_read_status (pi
))
3701 supply_gregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
3702 #if defined (FP0_REGNUM)
3703 supply_fpregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
);
3706 #else /* UNIXWARE */
3707 if (ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
) != -1)
3709 supply_gregset (&pi
->gregset
.gregset
);
3711 #if defined (FP0_REGNUM)
3712 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
) != -1)
3714 supply_fpregset (&pi
->fpregset
.fpregset
);
3717 #endif /* UNIXWARE */
3724 proc_init_failed - called whenever /proc access initialization
3729 static void proc_init_failed (struct procinfo *pi, char *why)
3733 This function is called whenever initialization of access to a /proc
3734 entry fails. It prints a suitable error message, does some cleanup,
3735 and then invokes the standard error processing routine which dumps
3736 us back into the command loop.
3740 proc_init_failed (pi
, why
)
3741 struct procinfo
*pi
;
3744 print_sys_errmsg (pi
->pathname
, errno
);
3745 kill (pi
->pid
, SIGKILL
);
3746 close_proc_file (pi
);
3755 close_proc_file - close any currently open /proc entry
3759 static void close_proc_file (struct procinfo *pip)
3763 Close any currently open /proc entry and mark the process information
3764 entry as invalid. In order to ensure that we don't try to reuse any
3765 stale information, the pid, fd, and pathnames are explicitly
3766 invalidated, which may be overkill.
3771 close_proc_file (pip
)
3772 struct procinfo
*pip
;
3774 struct procinfo
*procinfo
;
3776 remove_fd (pip
); /* Remove fd from poll/select list */
3778 close (pip
->ctl_fd
);
3779 #ifdef HAVE_MULTIPLE_PROC_FDS
3781 close (pip
->status_fd
);
3782 close (pip
->map_fd
);
3785 free (pip
-> pathname
);
3787 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
3789 if (procinfo_list
== pip
)
3790 procinfo_list
= pip
->next
;
3793 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
3795 if (procinfo
->next
== pip
)
3797 procinfo
->next
= pip
->next
;
3809 open_proc_file - open a /proc entry for a given process id
3813 static int open_proc_file (int pid, struct procinfo *pip, int mode)
3817 Given a process id and a mode, close the existing open /proc
3818 entry (if any) and open one for the new process id, in the
3819 specified mode. Once it is open, then mark the local process
3820 information structure as valid, which guarantees that the pid,
3821 fd, and pathname fields match an open /proc entry. Returns
3822 zero if the open fails, nonzero otherwise.
3824 Note that the pathname is left intact, even when the open fails,
3825 so that callers can use it to construct meaningful error messages
3826 rather than just "file open failed".
3828 Note that for Solaris, the process-id also includes an LWP-id, so we
3829 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
3830 then we will ask the kernel what it is and add it to the pid. Hence,
3831 the pid can be changed by us.
3835 open_proc_file (pid
, pip
, mode
, control
)
3837 struct procinfo
*pip
;
3844 pip
-> had_event
= 0;
3845 pip
-> pathname
= xmalloc (MAX_PROC_NAME_SIZE
);
3854 #ifdef HAVE_MULTIPLE_PROC_FDS
3855 sprintf (pip
->pathname
, STATUS_PROC_NAME_FMT
, tmp
);
3856 if ((pip
->status_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
3861 sprintf (pip
->pathname
, AS_PROC_NAME_FMT
, tmp
);
3862 if ((pip
->as_fd
= open (pip
->pathname
, O_RDWR
)) < 0)
3864 close (pip
->status_fd
);
3868 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
3869 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
3871 close (pip
->status_fd
);
3876 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
3877 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
3879 close (pip
->status_fd
);
3886 sprintf (pip
->pathname
, CTL_PROC_NAME_FMT
, tmp
);
3887 if ((pip
->ctl_fd
= open (pip
->pathname
, O_WRONLY
)) < 0)
3889 close (pip
->status_fd
);
3891 close (pip
->map_fd
);
3896 #else /* HAVE_MULTIPLE_PROC_FDS */
3897 sprintf (pip
-> pathname
, CTL_PROC_NAME_FMT
, tmp
);
3899 if ((tmpfd
= open (pip
-> pathname
, mode
)) < 0)
3903 pip
-> ctl_fd
= tmpfd
;
3904 pip
-> as_fd
= tmpfd
;
3905 pip
-> map_fd
= tmpfd
;
3906 pip
-> status_fd
= tmpfd
;
3908 tmp
= (pid
>> 16) & 0xffff; /* Extract thread id */
3911 { /* Don't know thread id yet */
3912 if (ioctl (tmpfd
, PIOCSTATUS
, &pip
-> prstatus
) < 0)
3914 print_sys_errmsg (pip
-> pathname
, errno
);
3916 error ("open_proc_file: PIOCSTATUS failed");
3919 tmp
= pip
-> prstatus
.pr_who
; /* Get thread id from prstatus_t */
3920 pip
-> pid
= (tmp
<< 16) | pid
; /* Update pip */
3923 if ((pip
-> ctl_fd
= ioctl (tmpfd
, PIOCOPENLWP
, &tmp
)) < 0)
3929 #ifdef PIOCSET /* New method */
3932 pr_flags
= PR_ASYNC
;
3933 ioctl (pip
-> ctl_fd
, PIOCSET
, &pr_flags
);
3937 /* keep extra fds in sync */
3938 pip
->as_fd
= pip
->ctl_fd
;
3939 pip
->map_fd
= pip
->ctl_fd
;
3940 pip
->status_fd
= pip
->ctl_fd
;
3942 close (tmpfd
); /* All done with main pid */
3943 #endif /* PIOCOPENLWP */
3945 #endif /* HAVE_MULTIPLE_PROC_FDS */
3951 mappingflags (flags
)
3954 static char asciiflags
[8];
3956 strcpy (asciiflags
, "-------");
3957 #if defined (MA_PHYS)
3958 if (flags
& MA_PHYS
) asciiflags
[0] = 'd';
3960 if (flags
& MA_STACK
) asciiflags
[1] = 's';
3961 if (flags
& MA_BREAK
) asciiflags
[2] = 'b';
3962 if (flags
& MA_SHARED
) asciiflags
[3] = 's';
3963 if (flags
& MA_READ
) asciiflags
[4] = 'r';
3964 if (flags
& MA_WRITE
) asciiflags
[5] = 'w';
3965 if (flags
& MA_EXEC
) asciiflags
[6] = 'x';
3966 return (asciiflags
);
3970 info_proc_flags (pip
, summary
)
3971 struct procinfo
*pip
;
3974 struct trans
*transp
;
3976 long flags
= pip
->prstatus
.pr_flags
| pip
->prstatus
.pr_lwp
.pr_flags
;
3978 long flags
= pip
->prstatus
.pr_flags
;
3981 printf_filtered ("%-32s", "Process status flags:");
3984 printf_filtered ("\n\n");
3986 for (transp
= pr_flag_table
; transp
-> name
!= NULL
; transp
++)
3988 if (flags
& transp
-> value
)
3992 printf_filtered ("%s ", transp
-> name
);
3996 printf_filtered ("\t%-16s %s.\n", transp
-> name
, transp
-> desc
);
4000 printf_filtered ("\n");
4004 info_proc_stop (pip
, summary
)
4005 struct procinfo
*pip
;
4008 struct trans
*transp
;
4013 why
= pip
-> prstatus
.pr_lwp
.pr_why
;
4014 what
= pip
-> prstatus
.pr_lwp
.pr_what
;
4016 why
= pip
-> prstatus
.pr_why
;
4017 what
= pip
-> prstatus
.pr_what
;
4021 if (pip
-> prstatus
.pr_lwp
.pr_flags
& PR_STOPPED
)
4023 if (pip
-> prstatus
.pr_flags
& PR_STOPPED
)
4026 printf_filtered ("%-32s", "Reason for stopping:");
4029 printf_filtered ("\n\n");
4031 for (transp
= pr_why_table
; transp
-> name
!= NULL
; transp
++)
4033 if (why
== transp
-> value
)
4037 printf_filtered ("%s ", transp
-> name
);
4041 printf_filtered ("\t%-16s %s.\n",
4042 transp
-> name
, transp
-> desc
);
4048 /* Use the pr_why field to determine what the pr_what field means, and
4049 print more information. */
4054 /* pr_what is unused for this case */
4060 printf_filtered ("%s ", signalname (what
));
4064 printf_filtered ("\t%-16s %s.\n", signalname (what
),
4065 safe_strsignal (what
));
4071 printf_filtered ("%s ", syscallname (what
));
4075 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4076 "Entered this system call");
4082 printf_filtered ("%s ", syscallname (what
));
4086 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4087 "Returned from this system call");
4093 printf_filtered ("%s ",
4094 lookupname (faults_table
, what
, "fault"));
4098 printf_filtered ("\t%-16s %s.\n",
4099 lookupname (faults_table
, what
, "fault"),
4100 lookupdesc (faults_table
, what
));
4104 printf_filtered ("\n");
4109 info_proc_siginfo (pip
, summary
)
4110 struct procinfo
*pip
;
4113 struct siginfo
*sip
;
4116 if ((pip
-> prstatus
.pr_lwp
.pr_flags
& PR_STOPPED
) &&
4117 (pip
-> prstatus
.pr_lwp
.pr_why
== PR_SIGNALLED
||
4118 pip
-> prstatus
.pr_lwp
.pr_why
== PR_FAULTED
))
4120 if ((pip
-> prstatus
.pr_flags
& PR_STOPPED
) &&
4121 (pip
-> prstatus
.pr_why
== PR_SIGNALLED
||
4122 pip
-> prstatus
.pr_why
== PR_FAULTED
))
4125 printf_filtered ("%-32s", "Additional signal/fault info:");
4127 sip
= &pip
-> prstatus
.pr_lwp
.pr_info
;
4129 sip
= &pip
-> prstatus
.pr_info
;
4133 printf_filtered ("%s ", signalname (sip
-> si_signo
));
4134 if (sip
-> si_errno
> 0)
4136 printf_filtered ("%s ", errnoname (sip
-> si_errno
));
4138 if (sip
-> si_code
<= 0)
4140 printf_filtered ("sent by %s, uid %d ",
4141 target_pid_to_str (sip
-> si_pid
),
4146 printf_filtered ("%s ", sigcodename (sip
));
4147 if ((sip
-> si_signo
== SIGILL
) ||
4148 (sip
-> si_signo
== SIGFPE
) ||
4149 (sip
-> si_signo
== SIGSEGV
) ||
4150 (sip
-> si_signo
== SIGBUS
))
4152 printf_filtered ("addr=%#lx ",
4153 (unsigned long) sip
-> si_addr
);
4155 else if ((sip
-> si_signo
== SIGCHLD
))
4157 printf_filtered ("child %s, status %u ",
4158 target_pid_to_str (sip
-> si_pid
),
4161 else if ((sip
-> si_signo
== SIGPOLL
))
4163 printf_filtered ("band %u ", sip
-> si_band
);
4169 printf_filtered ("\n\n");
4170 printf_filtered ("\t%-16s %s.\n", signalname (sip
-> si_signo
),
4171 safe_strsignal (sip
-> si_signo
));
4172 if (sip
-> si_errno
> 0)
4174 printf_filtered ("\t%-16s %s.\n",
4175 errnoname (sip
-> si_errno
),
4176 safe_strerror (sip
-> si_errno
));
4178 if (sip
-> si_code
<= 0)
4180 printf_filtered ("\t%-16u %s\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4181 "PID of process sending signal");
4182 printf_filtered ("\t%-16u %s\n", sip
-> si_uid
,
4183 "UID of process sending signal");
4187 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
4189 if ((sip
-> si_signo
== SIGILL
) ||
4190 (sip
-> si_signo
== SIGFPE
))
4192 printf_filtered ("\t%#-16lx %s.\n",
4193 (unsigned long) sip
-> si_addr
,
4194 "Address of faulting instruction");
4196 else if ((sip
-> si_signo
== SIGSEGV
) ||
4197 (sip
-> si_signo
== SIGBUS
))
4199 printf_filtered ("\t%#-16lx %s.\n",
4200 (unsigned long) sip
-> si_addr
,
4201 "Address of faulting memory reference");
4203 else if ((sip
-> si_signo
== SIGCHLD
))
4205 printf_filtered ("\t%-16u %s.\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4206 "Child process ID");
4207 printf_filtered ("\t%-16u %s.\n", sip
-> si_status
,
4208 "Child process exit value or signal");
4210 else if ((sip
-> si_signo
== SIGPOLL
))
4212 printf_filtered ("\t%-16u %s.\n", sip
-> si_band
,
4213 "Band event for POLL_{IN,OUT,MSG}");
4217 printf_filtered ("\n");
4222 info_proc_syscalls (pip
, summary
)
4223 struct procinfo
*pip
;
4231 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4232 if (pip
-> prstatus
.pr_flags
& PR_ASLEEP
)
4234 int syscallnum
= pip
-> prstatus
.pr_reg
[R_D0
];
4237 printf_filtered ("%-32s", "Sleeping in system call:");
4238 printf_filtered ("%s", syscallname (syscallnum
));
4242 printf_filtered ("Sleeping in system call '%s'.\n",
4243 syscallname (syscallnum
));
4249 if (ioctl (pip
-> ctl_fd
, PIOCGENTRY
, &pip
-> entryset
) < 0)
4251 print_sys_errmsg (pip
-> pathname
, errno
);
4252 error ("PIOCGENTRY failed");
4255 if (ioctl (pip
-> ctl_fd
, PIOCGEXIT
, &pip
-> exitset
) < 0)
4257 print_sys_errmsg (pip
-> pathname
, errno
);
4258 error ("PIOCGEXIT failed");
4262 printf_filtered ("System call tracing information:\n\n");
4264 printf_filtered ("\t%-12s %-8s %-8s\n",
4268 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
4271 if (syscall_table
[syscallnum
] != NULL
)
4272 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
4274 printf_filtered ("\t%-12d ", syscallnum
);
4277 printf_filtered ("%-8s ",
4278 prismember (&pip
->prstatus
.pr_sysentry
, syscallnum
)
4280 printf_filtered ("%-8s ",
4281 prismember (&pip
->prstatus
.pr_sysexit
, syscallnum
)
4284 printf_filtered ("%-8s ",
4285 prismember (&pip
-> entryset
, syscallnum
)
4287 printf_filtered ("%-8s ",
4288 prismember (&pip
-> exitset
, syscallnum
)
4291 printf_filtered ("\n");
4293 printf_filtered ("\n");
4302 static char locbuf
[32];
4304 name
= strsigno (signo
);
4307 sprintf (locbuf
, "Signal %d", signo
);
4311 sprintf (locbuf
, "%s (%d)", name
, signo
);
4321 static char locbuf
[32];
4323 name
= strerrno (errnum
);
4326 sprintf (locbuf
, "Errno %d", errnum
);
4330 sprintf (locbuf
, "%s (%d)", name
, errnum
);
4336 info_proc_signals (pip
, summary
)
4337 struct procinfo
*pip
;
4344 #ifndef PROCFS_USE_READ_WRITE
4345 if (ioctl (pip
-> ctl_fd
, PIOCGTRACE
, &pip
-> trace
) < 0)
4347 print_sys_errmsg (pip
-> pathname
, errno
);
4348 error ("PIOCGTRACE failed");
4352 printf_filtered ("Disposition of signals:\n\n");
4353 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4354 "Signal", "Trace", "Hold", "Pending", "Description");
4355 for (signo
= 0; signo
< NSIG
; signo
++)
4358 printf_filtered ("\t%-15s ", signalname (signo
));
4360 printf_filtered ("%-8s ",
4361 prismember (&pip
-> prstatus
.pr_sigtrace
, signo
)
4363 printf_filtered ("%-8s ",
4364 prismember (&pip
-> prstatus
.pr_lwp
.pr_context
.uc_sigmask
, signo
)
4367 printf_filtered ("%-8s ",
4368 prismember (&pip
-> trace
, signo
)
4370 printf_filtered ("%-8s ",
4371 prismember (&pip
-> prstatus
.pr_sighold
, signo
)
4376 if (prismember (&pip
->prstatus
.pr_sigpend
, signo
) ||
4377 prismember (&pip
->prstatus
.pr_lwp
.pr_lwppend
, signo
))
4378 printf_filtered("%-8s ", "yes");
4380 printf_filtered("%-8s ", "no");
4381 #else /* UNIXWARE */
4382 #ifdef PROCFS_SIGPEND_OFFSET
4383 /* Alpha OSF/1 numbers the pending signals from 1. */
4384 printf_filtered ("%-8s ",
4385 (signo
? prismember (&pip
-> prstatus
.pr_sigpend
,
4390 printf_filtered ("%-8s ",
4391 prismember (&pip
-> prstatus
.pr_sigpend
, signo
)
4394 #endif /* UNIXWARE */
4395 printf_filtered (" %s\n", safe_strsignal (signo
));
4397 printf_filtered ("\n");
4402 info_proc_faults (pip
, summary
)
4403 struct procinfo
*pip
;
4406 struct trans
*transp
;
4411 if (ioctl (pip
-> ctl_fd
, PIOCGFAULT
, &pip
->fltset
.fltset
) < 0)
4413 print_sys_errmsg (pip
-> pathname
, errno
);
4414 error ("PIOCGFAULT failed");
4418 printf_filtered ("Current traced hardware fault set:\n\n");
4419 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4421 for (transp
= faults_table
; transp
-> name
!= NULL
; transp
++)
4424 printf_filtered ("\t%-12s ", transp
-> name
);
4426 printf_filtered ("%-8s", prismember (&pip
->prstatus
.pr_flttrace
, transp
-> value
)
4429 printf_filtered ("%-8s", prismember (&pip
->fltset
.fltset
, transp
-> value
)
4432 printf_filtered ("\n");
4434 printf_filtered ("\n");
4439 info_proc_mappings (pip
, summary
)
4440 struct procinfo
*pip
;
4444 struct prmap
*prmaps
;
4445 struct prmap
*prmap
;
4450 printf_filtered ("Mapped address spaces:\n\n");
4451 #ifdef BFD_HOST_64_BIT
4452 printf_filtered (" %18s %18s %10s %10s %7s\n",
4454 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4461 #ifdef PROCFS_USE_READ_WRITE
4462 if (fstat (pip
->map_fd
, &sbuf
) == 0)
4464 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
4465 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4466 if ((lseek (pip
->map_fd
, 0, SEEK_SET
) == 0) &&
4467 (read (pip
->map_fd
, (char *) prmaps
,
4468 nmap
* sizeof (*prmaps
)) == (nmap
* sizeof (*prmaps
))))
4471 for (prmap
= prmaps
; i
< nmap
; ++prmap
, ++i
)
4473 if (ioctl (pip
-> ctl_fd
, PIOCNMAP
, &nmap
) == 0)
4475 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4476 if (ioctl (pip
-> ctl_fd
, PIOCMAP
, prmaps
) == 0)
4478 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
4479 #endif /* PROCFS_USE_READ_WRITE */
4481 #ifdef BFD_HOST_64_BIT
4482 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4484 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4486 (unsigned long)prmap
-> pr_vaddr
,
4487 (unsigned long)prmap
-> pr_vaddr
4488 + prmap
-> pr_size
- 1,
4491 mappingflags (prmap
-> pr_mflags
));
4495 printf_filtered ("\n");
4503 info_proc -- implement the "info proc" command
4507 void info_proc (char *args, int from_tty)
4511 Implement gdb's "info proc" command by using the /proc interface
4512 to print status information about any currently running process.
4514 Examples of the use of "info proc" are:
4516 info proc (prints summary info for current inferior)
4517 info proc 123 (prints summary info for process with pid 123)
4518 info proc mappings (prints address mappings)
4519 info proc times (prints process/children times)
4520 info proc id (prints pid, ppid, gid, sid, etc)
4521 FIXME: i proc id not implemented.
4522 info proc status (prints general process state info)
4523 FIXME: i proc status not implemented.
4524 info proc signals (prints info about signal handling)
4525 info proc all (prints all info)
4530 info_proc (args
, from_tty
)
4534 int pid
= inferior_pid
;
4535 struct procinfo
*pip
;
4536 struct cleanup
*old_chain
;
4552 old_chain
= make_cleanup (null_cleanup
, 0);
4554 /* Default to using the current inferior if no pid specified. Note
4555 that inferior_pid may be 0, hence we set okerr. */
4557 pip
= find_procinfo (inferior_pid
, 1);
4561 if ((argv
= buildargv (args
)) == NULL
)
4565 make_cleanup (freeargv
, (char *) argv
);
4567 while (*argv
!= NULL
)
4569 argsize
= strlen (*argv
);
4570 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
4575 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
4580 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
4585 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
4590 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
4595 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
4600 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
4605 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
4610 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
4615 else if ((pid
= atoi (*argv
)) > 0)
4617 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4618 memset (pip
, 0, sizeof (*pip
));
4621 if (!open_proc_file (pid
, pip
, O_RDONLY
, 0))
4623 perror_with_name (pip
-> pathname
);
4627 make_cleanup (close_proc_file
, pip
);
4629 else if (**argv
!= '\000')
4631 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
4637 /* If we don't have a valid open process at this point, then we have no
4638 inferior or didn't specify a specific pid. */
4643 No process. Start debugging a program or specify an explicit process ID.");
4646 if (!procfs_read_status (pip
))
4648 print_sys_errmsg (pip
-> pathname
, errno
);
4649 error ("procfs_read_status failed");
4652 #ifndef PROCFS_USE_READ_WRITE
4654 nlwp
= pip
->prstatus
.pr_nlwp
;
4655 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (id_t
));
4657 if (ioctl (pip
->ctl_fd
, PIOCLWPIDS
, lwps
))
4659 print_sys_errmsg (pip
-> pathname
, errno
);
4660 error ("PIOCLWPIDS failed");
4662 #else /* PIOCLWPIDS */
4664 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
4666 #endif /* PIOCLWPIDS */
4668 for (; nlwp
> 0; nlwp
--, lwps
++)
4670 pip
= find_procinfo ((*lwps
<< 16) | pid
, 1);
4674 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4675 memset (pip
, 0, sizeof (*pip
));
4676 if (!open_proc_file ((*lwps
<< 16) | pid
, pip
, O_RDONLY
, 0))
4679 make_cleanup (close_proc_file
, pip
);
4681 if (!procfs_read_status (pip
))
4683 print_sys_errmsg (pip
-> pathname
, errno
);
4684 error ("procfs_read_status failed");
4688 #endif /* PROCFS_USE_READ_WRITE */
4690 /* Print verbose information of the requested type(s), or just a summary
4691 of the information for all types. */
4693 printf_filtered ("\nInformation for %s.%d:\n\n", pip
-> pathname
, *lwps
);
4694 if (summary
|| all
|| flags
)
4696 info_proc_flags (pip
, summary
);
4700 info_proc_stop (pip
, summary
);
4702 if (summary
|| all
|| signals
|| faults
)
4704 info_proc_siginfo (pip
, summary
);
4706 if (summary
|| all
|| syscalls
)
4708 info_proc_syscalls (pip
, summary
);
4710 if (summary
|| all
|| mappings
)
4712 info_proc_mappings (pip
, summary
);
4714 if (summary
|| all
|| signals
)
4716 info_proc_signals (pip
, summary
);
4718 if (summary
|| all
|| faults
)
4720 info_proc_faults (pip
, summary
);
4722 printf_filtered ("\n");
4724 /* All done, deal with closing any temporary process info structure,
4725 freeing temporary memory , etc. */
4727 do_cleanups (old_chain
);
4728 #ifndef PROCFS_USE_READ_WRITE
4737 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
4741 void modify_inherit_on_fork_flag (fd, flag)
4745 Call this routine to modify the inherit-on-fork flag. This routine is
4746 just a nice wrapper to hide the #ifdefs needed by various systems to
4752 modify_inherit_on_fork_flag (fd
, flag
)
4756 #if defined (PIOCSET) || defined (PCSET)
4760 struct proc_ctl pctl
;
4762 #if defined (PIOCSET) || defined (PCSET) /* New method */
4766 #ifdef PROCFS_USE_READ_WRITE
4768 pctl
.data
= PR_FORK
;
4769 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
4772 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
4777 #ifdef PROCFS_USE_READ_WRITE
4779 pctl
.data
= PR_FORK
;
4780 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
4783 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
4788 #ifdef PIOCSFORK /* Original method */
4791 retval
= ioctl (fd
, PIOCSFORK
, NULL
);
4795 retval
= ioctl (fd
, PIOCRFORK
, NULL
);
4798 Neither PR_FORK nor PIOCSFORK exist
!!!
4805 print_sys_errmsg ("modify_inherit_on_fork_flag", errno
);
4806 error ("PIOCSFORK or PR_FORK modification failed");
4813 modify_run_on_last_close_flag - Change the run-on-last-close flag
4817 void modify_run_on_last_close_flag (fd, flag)
4821 Call this routine to modify the run-on-last-close flag. This routine
4822 is just a nice wrapper to hide the #ifdefs needed by various systems to
4828 modify_run_on_last_close_flag (fd
, flag
)
4832 #if defined (PIOCSET) || defined (PCSET)
4836 struct proc_ctl pctl
;
4838 #if defined (PIOCSET) || defined (PCSET) /* New method */
4842 #ifdef PROCFS_USE_READ_WRITE
4845 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
4848 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
4853 #ifdef PROCFS_USE_READ_WRITE
4856 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
4859 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
4864 #ifdef PIOCSRLC /* Original method */
4866 retval
= ioctl (fd
, PIOCSRLC
, NULL
);
4868 retval
= ioctl (fd
, PIOCRRLC
, NULL
);
4870 Neither PR_RLC nor PIOCSRLC exist
!!!
4877 print_sys_errmsg ("modify_run_on_last_close_flag", errno
);
4878 error ("PIOCSRLC or PR_RLC modification failed");
4885 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
4889 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
4893 This function function disables traps for the specified system call.
4894 errok is non-zero if errors should be ignored.
4898 procfs_clear_syscall_trap (pi
, syscall_num
, errok
)
4899 struct procinfo
*pi
;
4906 goterr
= ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0;
4908 if (goterr
&& !errok
)
4910 print_sys_errmsg (pi
->pathname
, errno
);
4911 error ("PIOCGENTRY failed");
4916 prdelset (&sysset
, syscall_num
);
4918 if ((ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0) && !errok
)
4920 print_sys_errmsg (pi
->pathname
, errno
);
4921 error ("PIOCSENTRY failed");
4925 goterr
= ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0;
4927 if (goterr
&& !errok
)
4929 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
4930 print_sys_errmsg (pi
->pathname
, errno
);
4931 error ("PIOCGEXIT failed");
4936 praddset (&sysset
, syscall_num
);
4938 if ((ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0) && !errok
)
4940 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
4941 print_sys_errmsg (pi
->pathname
, errno
);
4942 error ("PIOCSEXIT failed");
4946 if (!pi
->syscall_handlers
)
4949 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
4953 /* Remove handler func from the handler list */
4955 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
4956 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
4958 if (i
+ 1 != pi
->num_syscall_handlers
)
4959 { /* Not the last entry.
4960 Move subsequent entries fwd. */
4961 memcpy (&pi
->syscall_handlers
[i
], &pi
->syscall_handlers
[i
+ 1],
4962 (pi
->num_syscall_handlers
- i
- 1)
4963 * sizeof (struct procfs_syscall_handler
));
4966 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
,
4967 (pi
->num_syscall_handlers
- 1)
4968 * sizeof (struct procfs_syscall_handler
));
4969 pi
->num_syscall_handlers
--;
4974 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
4982 procfs_set_syscall_trap -- arrange for a function to be called when the
4983 child executes the specified system call.
4987 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
4988 syscall_func_t *function)
4992 This function sets up an entry and/or exit trap for the specified system
4993 call. When the child executes the specified system call, your function
4994 will be called with the call #, a flag that indicates entry or exit, and
4995 pointers to rtnval and statval (which are used by procfs_wait). The
4996 function should return non-zero if something interesting happened, zero
5001 procfs_set_syscall_trap (pi
, syscall_num
, flags
, func
)
5002 struct procinfo
*pi
;
5005 syscall_func_t
*func
;
5009 if (flags
& PROCFS_SYSCALL_ENTRY
)
5011 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0)
5013 print_sys_errmsg (pi
->pathname
, errno
);
5014 error ("PIOCGENTRY failed");
5017 praddset (&sysset
, syscall_num
);
5019 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0)
5021 print_sys_errmsg (pi
->pathname
, errno
);
5022 error ("PIOCSENTRY failed");
5026 if (flags
& PROCFS_SYSCALL_EXIT
)
5028 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0)
5030 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5031 print_sys_errmsg (pi
->pathname
, errno
);
5032 error ("PIOCGEXIT failed");
5035 praddset (&sysset
, syscall_num
);
5037 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0)
5039 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5040 print_sys_errmsg (pi
->pathname
, errno
);
5041 error ("PIOCSEXIT failed");
5045 if (!pi
->syscall_handlers
)
5047 pi
->syscall_handlers
= xmalloc (sizeof (struct procfs_syscall_handler
));
5048 pi
->syscall_handlers
[0].syscall_num
= syscall_num
;
5049 pi
->syscall_handlers
[0].func
= func
;
5050 pi
->num_syscall_handlers
= 1;
5056 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5057 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5059 pi
->syscall_handlers
[i
].func
= func
;
5063 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
, (i
+ 1)
5064 * sizeof (struct procfs_syscall_handler
));
5065 pi
->syscall_handlers
[i
].syscall_num
= syscall_num
;
5066 pi
->syscall_handlers
[i
].func
= func
;
5067 pi
->num_syscall_handlers
++;
5071 #ifdef SYS_lwp_create
5077 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5081 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5085 This routine is called both when an inferior process and it's new lwp
5086 are about to finish a _lwp_create() system call. This is the system
5087 call that Solaris uses to create a lightweight process. When the
5088 target process gets this event, we can look at sysarg[2] to find the
5089 new childs lwp ID, and create a procinfo struct from that. After that,
5090 we pretend that we got a SIGTRAP, and return non-zero to tell
5091 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5092 sees the new process and continues it.
5094 When we see the child exiting from lwp_create, we just contine it,
5095 since everything was handled when the parent trapped.
5098 In effect, we are only paying attention to the parent's completion of
5099 the lwp_create syscall. If we only paid attention to the child
5100 instead, then we wouldn't detect the creation of a suspended thread.
5104 procfs_lwp_creation_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
5105 struct procinfo
*pi
;
5112 struct procinfo
*childpi
;
5114 /* We've just detected the completion of an lwp_create system call. Now we
5115 need to setup a procinfo struct for this thread, and notify the thread
5116 system of the new arrival. */
5118 /* If lwp_create failed, then nothing interesting happened. Continue the
5119 process and go back to sleep. */
5121 if (pi
->prstatus
.pr_reg
[R_PSR
] & PS_FLAG_CARRY
)
5122 { /* _lwp_create failed */
5123 pi
->prrun
.pr_flags
&= PRSTEP
;
5124 pi
->prrun
.pr_flags
|= PRCFAULT
;
5126 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5127 perror_with_name (pi
->pathname
);
5132 /* At this point, the new thread is stopped at it's first instruction, and
5133 the parent is stopped at the exit from lwp_create. */
5135 if (pi
->new_child
) /* Child? */
5136 { /* Yes, just continue it */
5137 pi
->prrun
.pr_flags
&= PRSTEP
;
5138 pi
->prrun
.pr_flags
|= PRCFAULT
;
5140 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
5141 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5142 perror_with_name (pi
->pathname
);
5144 pi
->new_child
= 0; /* No longer new */
5149 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5150 in the child and continue the parent. */
5152 /* Third arg is pointer to new thread id. */
5153 lwp_id
= read_memory_integer (pi
->prstatus
.pr_sysarg
[2], sizeof (int));
5155 lwp_id
= (lwp_id
<< 16) | PIDGET (pi
->pid
);
5157 childpi
= create_procinfo (lwp_id
);
5159 /* The new process has actually inherited the lwp_create syscall trap from
5160 it's parent, but we still have to call this to register a handler for
5163 procfs_set_syscall_trap (childpi
, SYS_lwp_create
, PROCFS_SYSCALL_EXIT
,
5164 procfs_lwp_creation_handler
);
5166 childpi
->new_child
= 1; /* Flag this as an unseen child process */
5168 *rtnvalp
= lwp_id
; /* the new arrival. */
5169 *statvalp
= (SIGTRAP
<< 8) | 0177;
5173 #endif /* SYS_lwp_create */
5175 /* Fork an inferior process, and start debugging it with /proc. */
5178 procfs_create_inferior (exec_file
, allargs
, env
)
5183 char *shell_file
= getenv ("SHELL");
5185 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
5188 /* We will be looking down the PATH to find shell_file. If we
5189 just do this the normal way (via execlp, which operates by
5190 attempting an exec for each element of the PATH until it
5191 finds one which succeeds), then there will be an exec for
5192 each failed attempt, each of which will cause a PR_SYSEXIT
5193 stop, and we won't know how to distinguish the PR_SYSEXIT's
5194 for these failed execs with the ones for successful execs
5195 (whether the exec has succeeded is stored at that time in the
5196 carry bit or some such architecture-specific and
5197 non-ABI-specified place).
5199 So I can't think of anything better than to search the PATH
5200 now. This has several disadvantages: (1) There is a race
5201 condition; if we find a file now and it is deleted before we
5202 exec it, we lose, even if the deletion leaves a valid file
5203 further down in the PATH, (2) there is no way to know exactly
5204 what an executable (in the sense of "capable of being
5205 exec'd") file is. Using access() loses because it may lose
5206 if the caller is the superuser; failing to use it loses if
5207 there are ACLs or some such. */
5211 /* FIXME-maybe: might want "set path" command so user can change what
5212 path is used from within GDB. */
5213 char *path
= getenv ("PATH");
5215 struct stat statbuf
;
5218 path
= "/bin:/usr/bin";
5220 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
5221 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1: NULL
)
5223 p1
= strchr (p
, ':');
5228 strncpy (tryname
, p
, len
);
5229 tryname
[len
] = '\0';
5230 strcat (tryname
, "/");
5231 strcat (tryname
, shell_file
);
5232 if (access (tryname
, X_OK
) < 0)
5234 if (stat (tryname
, &statbuf
) < 0)
5236 if (!S_ISREG (statbuf
.st_mode
))
5237 /* We certainly need to reject directories. I'm not quite
5238 as sure about FIFOs, sockets, etc., but I kind of doubt
5239 that people want to exec() these things. */
5244 /* Not found. This must be an error rather than merely passing
5245 the file to execlp(), because execlp() would try all the
5246 exec()s, causing GDB to get confused. */
5247 error ("Can't find shell %s in PATH", shell_file
);
5249 shell_file
= tryname
;
5252 fork_inferior (exec_file
, allargs
, env
,
5253 proc_set_exec_trap
, procfs_init_inferior
, shell_file
);
5255 /* We are at the first instruction we care about. */
5256 /* Pedal to the metal... */
5258 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
5261 /* Clean up after the inferior dies. */
5264 procfs_mourn_inferior ()
5266 struct procinfo
*pi
;
5267 struct procinfo
*next_pi
;
5269 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5272 unconditionally_kill_inferior (pi
);
5275 unpush_target (&procfs_ops
);
5276 generic_mourn_inferior ();
5280 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5284 /* This variable is controlled by modules that sit atop procfs that may layer
5285 their own process structure atop that provided here. sol-thread.c does
5286 this because of the Solaris two-level thread model. */
5288 return !procfs_suppress_run
;
5290 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5292 /* Insert a watchpoint */
5294 procfs_set_watchpoint(pid
, addr
, len
, rw
)
5300 struct procinfo
*pi
;
5303 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5304 wpt
.pr_vaddr
= (caddr_t
)addr
;
5306 wpt
.pr_wflags
= ((rw
& 1) ? MA_READ
: 0) | ((rw
& 2) ? MA_WRITE
: 0);
5307 if (ioctl (pi
->ctl_fd
, PIOCSWATCH
, &wpt
) < 0)
5311 /* Currently it sometimes happens that the same watchpoint gets
5312 deleted twice - don't die in this case (FIXME please) */
5313 if (errno
== ESRCH
&& len
== 0)
5315 print_sys_errmsg (pi
->pathname
, errno
);
5316 error ("PIOCSWATCH failed");
5322 procfs_stopped_by_watchpoint(pid
)
5325 struct procinfo
*pi
;
5329 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5330 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
5332 why
= pi
->prstatus
.pr_why
;
5333 what
= pi
->prstatus
.pr_what
;
5334 if (why
== PR_FAULTED
5335 #if defined (FLTWATCH) && defined (FLTKWATCH)
5336 && (what
== FLTWATCH
|| what
== FLTKWATCH
)
5339 && (what
== FLTWATCH
)
5342 && (what
== FLTKWATCH
)
5350 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5352 /* Why is this necessary? Shouldn't dead threads just be removed from the
5356 procfs_thread_alive (pid
)
5362 /* Send a SIGINT to the process group. This acts just like the user typed a
5363 ^C on the controlling terminal.
5365 XXX - This may not be correct for all systems. Some may want to use
5366 killpg() instead of kill (-pgrp). */
5371 extern pid_t inferior_process_group
;
5373 kill (-inferior_process_group
, SIGINT
);
5376 /* Convert a pid to printable form. */
5380 procfs_pid_to_str (pid
)
5383 static char buf
[100];
5385 sprintf (buf
, "Kernel thread %d", TIDGET (pid
));
5391 struct target_ops procfs_ops
= {
5392 "procfs", /* to_shortname */
5393 "Unix /proc child process", /* to_longname */
5394 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
5395 procfs_open
, /* to_open */
5397 procfs_attach
, /* to_attach */
5398 procfs_detach
, /* to_detach */
5399 procfs_resume
, /* to_resume */
5400 procfs_wait
, /* to_wait */
5401 procfs_fetch_registers
, /* to_fetch_registers */
5402 procfs_store_registers
, /* to_store_registers */
5403 procfs_prepare_to_store
, /* to_prepare_to_store */
5404 procfs_xfer_memory
, /* to_xfer_memory */
5405 procfs_files_info
, /* to_files_info */
5406 memory_insert_breakpoint
, /* to_insert_breakpoint */
5407 memory_remove_breakpoint
, /* to_remove_breakpoint */
5408 terminal_init_inferior
, /* to_terminal_init */
5409 terminal_inferior
, /* to_terminal_inferior */
5410 terminal_ours_for_output
, /* to_terminal_ours_for_output */
5411 terminal_ours
, /* to_terminal_ours */
5412 child_terminal_info
, /* to_terminal_info */
5413 procfs_kill_inferior
, /* to_kill */
5415 0, /* to_lookup_symbol */
5416 procfs_create_inferior
, /* to_create_inferior */
5417 procfs_mourn_inferior
, /* to_mourn_inferior */
5418 procfs_can_run
, /* to_can_run */
5419 procfs_notice_signals
, /* to_notice_signals */
5420 procfs_thread_alive
, /* to_thread_alive */
5421 procfs_stop
, /* to_stop */
5422 process_stratum
, /* to_stratum */
5424 1, /* to_has_all_memory */
5425 1, /* to_has_memory */
5426 1, /* to_has_stack */
5427 1, /* to_has_registers */
5428 1, /* to_has_execution */
5430 0, /* sections_end */
5431 OPS_MAGIC
/* to_magic */
5435 _initialize_procfs ()
5437 #ifdef HAVE_OPTIONAL_PROC_FS
5438 char procname
[MAX_PROC_NAME_SIZE
];
5441 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5442 don't add procfs support if we cannot access the running
5444 sprintf (procname
, STATUS_PROC_NAME_FMT
, getpid ());
5445 if ((fd
= open (procname
, O_RDONLY
)) < 0)
5450 add_target (&procfs_ops
);
5452 add_info ("proc", info_proc
,
5453 "Show process status information using /proc entry.\n\
5454 Specify process id or use current inferior by default.\n\
5455 Specify keywords for detailed information; default is summary.\n\
5456 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5457 `status', `syscalls', and `times'.\n\
5458 Unambiguous abbreviations may be used.");
5460 init_syscall_table ();