1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 For information on the details of using /proc consult section proc(4)
25 in the UNIX System V Release 4 System Administrator's Reference Manual.
27 The general register and floating point register sets are manipulated by
28 separate ioctl's. This file makes the assumption that if FP0_REGNUM is
29 defined, then support for the floating point register set is desired,
30 regardless of whether or not the actual target has floating point hardware.
38 #include <sys/procfs.h>
50 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
53 #define PROC_NAME_FMT "/proc/%05d"
56 extern struct target_ops procfs_ops
; /* Forward declaration */
58 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
59 CORE_ADDR kernel_u_addr
;
62 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
64 #define si_pid _data._proc.pid
66 #define si_uid _data._proc._pdata._kill.uid
67 #endif /* BROKEN_SIGINFO_H */
69 /* All access to the inferior, either one started by gdb or one that has
70 been attached to, is controlled by an instance of a procinfo structure,
71 defined below. Since gdb currently only handles one inferior at a time,
72 the procinfo structure for the inferior is statically allocated and
73 only one exists at any given time. There is a separate procinfo
74 structure for use by the "info proc" command, so that we can print
75 useful information about any random process without interfering with
76 the inferior's procinfo information. */
79 struct procinfo
*next
;
80 int pid
; /* Process ID of inferior */
81 int fd
; /* File descriptor for /proc entry */
82 char *pathname
; /* Pathname to /proc entry */
83 int had_event
; /* poll/select says something happened */
84 int was_stopped
; /* Nonzero if was stopped prior to attach */
85 int nopass_next_sigstop
; /* Don't pass a sigstop on next resume */
86 prrun_t prrun
; /* Control state when it is run */
87 prstatus_t prstatus
; /* Current process status info */
88 gregset_t gregset
; /* General register set */
89 fpregset_t fpregset
; /* Floating point register set */
90 fltset_t fltset
; /* Current traced hardware fault set */
91 sigset_t trace
; /* Current traced signal set */
92 sysset_t exitset
; /* Current traced system call exit set */
93 sysset_t entryset
; /* Current traced system call entry set */
94 fltset_t saved_fltset
; /* Saved traced hardware fault set */
95 sigset_t saved_trace
; /* Saved traced signal set */
96 sigset_t saved_sighold
; /* Saved held signal set */
97 sysset_t saved_exitset
; /* Saved traced system call exit set */
98 sysset_t saved_entryset
; /* Saved traced system call entry set */
101 /* List of inferior process information */
102 static struct procinfo
*procinfo_list
= NULL
;
104 static struct pollfd
*poll_list
; /* pollfds used for waiting on /proc */
106 static int num_poll_list
= 0; /* Number of entries in poll_list */
108 static int last_resume_pid
= -1; /* Last pid used with procfs_resume */
110 /* Much of the information used in the /proc interface, particularly for
111 printing status information, is kept as tables of structures of the
112 following form. These tables can be used to map numeric values to
113 their symbolic names and to a string that describes their specific use. */
116 int value
; /* The numeric value */
117 char *name
; /* The equivalent symbolic value */
118 char *desc
; /* Short description of value */
121 /* Translate bits in the pr_flags member of the prstatus structure, into the
122 names and desc information. */
124 static struct trans pr_flag_table
[] =
126 #if defined (PR_STOPPED)
127 PR_STOPPED
, "PR_STOPPED", "Process is stopped",
129 #if defined (PR_ISTOP)
130 PR_ISTOP
, "PR_ISTOP", "Stopped on an event of interest",
132 #if defined (PR_DSTOP)
133 PR_DSTOP
, "PR_DSTOP", "A stop directive is in effect",
135 #if defined (PR_ASLEEP)
136 PR_ASLEEP
, "PR_ASLEEP", "Sleeping in an interruptible system call",
138 #if defined (PR_FORK)
139 PR_FORK
, "PR_FORK", "Inherit-on-fork is in effect",
142 PR_RLC
, "PR_RLC", "Run-on-last-close is in effect",
144 #if defined (PR_PTRACE)
145 PR_PTRACE
, "PR_PTRACE", "Process is being controlled by ptrace",
147 #if defined (PR_PCINVAL)
148 PR_PCINVAL
, "PR_PCINVAL", "PC refers to an invalid virtual address",
150 #if defined (PR_ISSYS)
151 PR_ISSYS
, "PR_ISSYS", "Is a system process",
153 #if defined (PR_STEP)
154 PR_STEP
, "PR_STEP", "Process has single step pending",
157 PR_KLC
, "PR_KLC", "Kill-on-last-close is in effect",
159 #if defined (PR_ASYNC)
160 PR_ASYNC
, "PR_ASYNC", "Asynchronous stop is in effect",
162 #if defined (PR_PCOMPAT)
163 PR_PCOMPAT
, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
168 /* Translate values in the pr_why field of the prstatus struct. */
170 static struct trans pr_why_table
[] =
172 #if defined (PR_REQUESTED)
173 PR_REQUESTED
, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
175 #if defined (PR_SIGNALLED)
176 PR_SIGNALLED
, "PR_SIGNALLED", "Receipt of a traced signal",
178 #if defined (PR_FAULTED)
179 PR_FAULTED
, "PR_FAULTED", "Incurred a traced hardware fault",
181 #if defined (PR_SYSENTRY)
182 PR_SYSENTRY
, "PR_SYSENTRY", "Entry to a traced system call",
184 #if defined (PR_SYSEXIT)
185 PR_SYSEXIT
, "PR_SYSEXIT", "Exit from a traced system call",
187 #if defined (PR_JOBCONTROL)
188 PR_JOBCONTROL
, "PR_JOBCONTROL", "Default job control stop signal action",
190 #if defined (PR_SUSPENDED)
191 PR_SUSPENDED
, "PR_SUSPENDED", "Process suspended",
196 /* Hardware fault translation table. */
198 static struct trans faults_table
[] =
201 FLTILL
, "FLTILL", "Illegal instruction",
203 #if defined (FLTPRIV)
204 FLTPRIV
, "FLTPRIV", "Privileged instruction",
207 FLTBPT
, "FLTBPT", "Breakpoint trap",
209 #if defined (FLTTRACE)
210 FLTTRACE
, "FLTTRACE", "Trace trap",
212 #if defined (FLTACCESS)
213 FLTACCESS
, "FLTACCESS", "Memory access fault",
215 #if defined (FLTBOUNDS)
216 FLTBOUNDS
, "FLTBOUNDS", "Memory bounds violation",
218 #if defined (FLTIOVF)
219 FLTIOVF
, "FLTIOVF", "Integer overflow",
221 #if defined (FLTIZDIV)
222 FLTIZDIV
, "FLTIZDIV", "Integer zero divide",
225 FLTFPE
, "FLTFPE", "Floating-point exception",
227 #if defined (FLTSTACK)
228 FLTSTACK
, "FLTSTACK", "Unrecoverable stack fault",
230 #if defined (FLTPAGE)
231 FLTPAGE
, "FLTPAGE", "Recoverable page fault",
236 /* Translation table for signal generation information. See UNIX System
237 V Release 4 Programmer's Reference Manual, siginfo(5). */
239 static struct sigcode
{
244 } siginfo_table
[] = {
245 #if defined (SIGILL) && defined (ILL_ILLOPC)
246 SIGILL
, ILL_ILLOPC
, "ILL_ILLOPC", "Illegal opcode",
248 #if defined (SIGILL) && defined (ILL_ILLOPN)
249 SIGILL
, ILL_ILLOPN
, "ILL_ILLOPN", "Illegal operand",
251 #if defined (SIGILL) && defined (ILL_ILLADR)
252 SIGILL
, ILL_ILLADR
, "ILL_ILLADR", "Illegal addressing mode",
254 #if defined (SIGILL) && defined (ILL_ILLTRP)
255 SIGILL
, ILL_ILLTRP
, "ILL_ILLTRP", "Illegal trap",
257 #if defined (SIGILL) && defined (ILL_PRVOPC)
258 SIGILL
, ILL_PRVOPC
, "ILL_PRVOPC", "Privileged opcode",
260 #if defined (SIGILL) && defined (ILL_PRVREG)
261 SIGILL
, ILL_PRVREG
, "ILL_PRVREG", "Privileged register",
263 #if defined (SIGILL) && defined (ILL_COPROC)
264 SIGILL
, ILL_COPROC
, "ILL_COPROC", "Coprocessor error",
266 #if defined (SIGILL) && defined (ILL_BADSTK)
267 SIGILL
, ILL_BADSTK
, "ILL_BADSTK", "Internal stack error",
269 #if defined (SIGFPE) && defined (FPE_INTDIV)
270 SIGFPE
, FPE_INTDIV
, "FPE_INTDIV", "Integer divide by zero",
272 #if defined (SIGFPE) && defined (FPE_INTOVF)
273 SIGFPE
, FPE_INTOVF
, "FPE_INTOVF", "Integer overflow",
275 #if defined (SIGFPE) && defined (FPE_FLTDIV)
276 SIGFPE
, FPE_FLTDIV
, "FPE_FLTDIV", "Floating point divide by zero",
278 #if defined (SIGFPE) && defined (FPE_FLTOVF)
279 SIGFPE
, FPE_FLTOVF
, "FPE_FLTOVF", "Floating point overflow",
281 #if defined (SIGFPE) && defined (FPE_FLTUND)
282 SIGFPE
, FPE_FLTUND
, "FPE_FLTUND", "Floating point underflow",
284 #if defined (SIGFPE) && defined (FPE_FLTRES)
285 SIGFPE
, FPE_FLTRES
, "FPE_FLTRES", "Floating point inexact result",
287 #if defined (SIGFPE) && defined (FPE_FLTINV)
288 SIGFPE
, FPE_FLTINV
, "FPE_FLTINV", "Invalid floating point operation",
290 #if defined (SIGFPE) && defined (FPE_FLTSUB)
291 SIGFPE
, FPE_FLTSUB
, "FPE_FLTSUB", "Subscript out of range",
293 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
294 SIGSEGV
, SEGV_MAPERR
, "SEGV_MAPERR", "Address not mapped to object",
296 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
297 SIGSEGV
, SEGV_ACCERR
, "SEGV_ACCERR", "Invalid permissions for object",
299 #if defined (SIGBUS) && defined (BUS_ADRALN)
300 SIGBUS
, BUS_ADRALN
, "BUS_ADRALN", "Invalid address alignment",
302 #if defined (SIGBUS) && defined (BUS_ADRERR)
303 SIGBUS
, BUS_ADRERR
, "BUS_ADRERR", "Non-existent physical address",
305 #if defined (SIGBUS) && defined (BUS_OBJERR)
306 SIGBUS
, BUS_OBJERR
, "BUS_OBJERR", "Object specific hardware error",
308 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
309 SIGTRAP
, TRAP_BRKPT
, "TRAP_BRKPT", "Process breakpoint",
311 #if defined (SIGTRAP) && defined (TRAP_TRACE)
312 SIGTRAP
, TRAP_TRACE
, "TRAP_TRACE", "Process trace trap",
314 #if defined (SIGCLD) && defined (CLD_EXITED)
315 SIGCLD
, CLD_EXITED
, "CLD_EXITED", "Child has exited",
317 #if defined (SIGCLD) && defined (CLD_KILLED)
318 SIGCLD
, CLD_KILLED
, "CLD_KILLED", "Child was killed",
320 #if defined (SIGCLD) && defined (CLD_DUMPED)
321 SIGCLD
, CLD_DUMPED
, "CLD_DUMPED", "Child has terminated abnormally",
323 #if defined (SIGCLD) && defined (CLD_TRAPPED)
324 SIGCLD
, CLD_TRAPPED
, "CLD_TRAPPED", "Traced child has trapped",
326 #if defined (SIGCLD) && defined (CLD_STOPPED)
327 SIGCLD
, CLD_STOPPED
, "CLD_STOPPED", "Child has stopped",
329 #if defined (SIGCLD) && defined (CLD_CONTINUED)
330 SIGCLD
, CLD_CONTINUED
, "CLD_CONTINUED", "Stopped child had continued",
332 #if defined (SIGPOLL) && defined (POLL_IN)
333 SIGPOLL
, POLL_IN
, "POLL_IN", "Input input available",
335 #if defined (SIGPOLL) && defined (POLL_OUT)
336 SIGPOLL
, POLL_OUT
, "POLL_OUT", "Output buffers available",
338 #if defined (SIGPOLL) && defined (POLL_MSG)
339 SIGPOLL
, POLL_MSG
, "POLL_MSG", "Input message available",
341 #if defined (SIGPOLL) && defined (POLL_ERR)
342 SIGPOLL
, POLL_ERR
, "POLL_ERR", "I/O error",
344 #if defined (SIGPOLL) && defined (POLL_PRI)
345 SIGPOLL
, POLL_PRI
, "POLL_PRI", "High priority input available",
347 #if defined (SIGPOLL) && defined (POLL_HUP)
348 SIGPOLL
, POLL_HUP
, "POLL_HUP", "Device disconnected",
353 static char *syscall_table
[MAX_SYSCALLS
];
355 /* Prototypes for local functions */
358 set_proc_siginfo
PARAMS ((struct procinfo
*, int));
361 init_syscall_table
PARAMS ((void));
364 syscallname
PARAMS ((int));
367 signalname
PARAMS ((int));
370 errnoname
PARAMS ((int));
373 proc_address_to_fd
PARAMS ((struct procinfo
*, CORE_ADDR
, int));
376 open_proc_file
PARAMS ((int, struct procinfo
*, int));
379 close_proc_file
PARAMS ((struct procinfo
*));
382 unconditionally_kill_inferior
PARAMS ((struct procinfo
*));
385 proc_init_failed
PARAMS ((struct procinfo
*, char *));
388 info_proc
PARAMS ((char *, int));
391 info_proc_flags
PARAMS ((struct procinfo
*, int));
394 info_proc_stop
PARAMS ((struct procinfo
*, int));
397 info_proc_siginfo
PARAMS ((struct procinfo
*, int));
400 info_proc_syscalls
PARAMS ((struct procinfo
*, int));
403 info_proc_mappings
PARAMS ((struct procinfo
*, int));
406 info_proc_signals
PARAMS ((struct procinfo
*, int));
409 info_proc_faults
PARAMS ((struct procinfo
*, int));
412 mappingflags
PARAMS ((long));
415 lookupname
PARAMS ((struct trans
*, unsigned int, char *));
418 lookupdesc
PARAMS ((struct trans
*, unsigned int));
421 do_attach
PARAMS ((int pid
));
424 do_detach
PARAMS ((int siggnal
));
427 procfs_create_inferior
PARAMS ((char *, char *, char **));
430 procfs_notice_signals
PARAMS ((int pid
));
432 static struct procinfo
*
433 find_procinfo
PARAMS ((pid_t pid
, int okfail
));
435 /* External function prototypes that can't be easily included in any
436 header file because the args are typedefs in system include files. */
439 supply_gregset
PARAMS ((gregset_t
*));
442 fill_gregset
PARAMS ((gregset_t
*, int));
445 supply_fpregset
PARAMS ((fpregset_t
*));
448 fill_fpregset
PARAMS ((fpregset_t
*, int));
454 find_procinfo -- convert a process id to a struct procinfo
458 static struct procinfo * find_procinfo (pid_t pid, int okfail);
462 Given a process id, look it up in the procinfo chain. Returns
463 a struct procinfo *. If can't find pid, then call error(),
464 unless okfail is set, in which case, return NULL;
467 static struct procinfo
*
468 find_procinfo (pid
, okfail
)
472 struct procinfo
*procinfo
;
474 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
475 if (procinfo
->pid
== pid
)
481 error ("procfs (find_procinfo): Couldn't locate pid %d", pid
);
488 current_procinfo -- convert inferior_pid to a struct procinfo
492 static struct procinfo * current_procinfo;
496 Looks up inferior_pid in the procinfo chain. Always returns a
497 struct procinfo *. If process can't be found, we error() out.
500 #define current_procinfo find_procinfo (inferior_pid, 0)
506 add_fd -- Add the fd to the poll/select list
510 static void add_fd (struct procinfo *);
514 Add the fd of the supplied procinfo to the list of fds used for
515 poll/select operations.
522 if (num_poll_list
<= 0)
523 poll_list
= (struct pollfd
*) xmalloc (sizeof (struct pollfd
));
525 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
527 * sizeof (struct pollfd
));
528 poll_list
[num_poll_list
].fd
= pi
->fd
;
529 poll_list
[num_poll_list
].events
= POLLPRI
;
540 for (i
= 0; i
< num_poll_list
; i
++)
542 if (poll_list
[i
].fd
== pi
->fd
)
544 if (i
!= num_poll_list
- 1)
545 memcpy (poll_list
, poll_list
+ i
+ 1,
546 (num_poll_list
- i
- 1) * sizeof (struct pollfd
));
550 if (num_poll_list
== 0)
553 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
555 * sizeof (struct pollfd
));
561 #define LOSING_POLL unixware_sux
563 static struct procinfo
*
571 set_sigint_trap (); /* Causes SIGINT to be passed on to the
575 num_fds
= poll (poll_list
, num_poll_list
, -1);
577 pi
= current_procinfo
;
579 if (ioctl (pi
->fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
581 print_sys_errmsg (pi
->pathname
, errno
);
582 error ("PIOCWSTOP failed");
594 print_sys_errmsg ("poll failed\n", errno
);
595 error ("Poll failed, returned %d", num_fds
);
598 for (i
= 0; i
< num_poll_list
&& num_fds
> 0; i
++)
600 if ((poll_list
[i
].revents
& (POLLPRI
|POLLERR
|POLLHUP
|POLLNVAL
)) == 0)
602 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
604 if (poll_list
[i
].fd
== pi
->fd
)
606 if (ioctl (pi
->fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
608 print_sys_errmsg (pi
->pathname
, errno
);
609 error ("PIOCSTATUS failed");
617 error ("procfs_wait: Couldn't find procinfo for fd %d\n",
620 #endif /* LOSING_POLL */
629 lookupdesc -- translate a value to a summary desc string
633 static char *lookupdesc (struct trans *transp, unsigned int val);
637 Given a pointer to a translation table and a value to be translated,
638 lookup the desc string and return it.
642 lookupdesc (transp
, val
)
643 struct trans
*transp
;
648 for (desc
= NULL
; transp
-> name
!= NULL
; transp
++)
650 if (transp
-> value
== val
)
652 desc
= transp
-> desc
;
657 /* Didn't find a translation for the specified value, set a default one. */
670 lookupname -- translate a value to symbolic name
674 static char *lookupname (struct trans *transp, unsigned int val,
679 Given a pointer to a translation table, a value to be translated,
680 and a default prefix to return if the value can't be translated,
681 match the value with one of the translation table entries and
682 return a pointer to the symbolic name.
684 If no match is found it just returns the value as a printable string,
685 with the given prefix. The previous such value, if any, is freed
690 lookupname (transp
, val
, prefix
)
691 struct trans
*transp
;
698 for (name
= NULL
; transp
-> name
!= NULL
; transp
++)
700 if (transp
-> value
== val
)
702 name
= transp
-> name
;
707 /* Didn't find a translation for the specified value, build a default
708 one using the specified prefix and return it. The lifetime of
709 the value is only until the next one is needed. */
717 locbuf
= xmalloc (strlen (prefix
) + 16);
718 sprintf (locbuf
, "%s %u", prefix
, val
);
730 static char locbuf
[32];
732 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
734 if ((scp
-> signo
== sip
-> si_signo
) &&
735 (scp
-> code
== sip
-> si_code
))
737 name
= scp
-> codename
;
743 sprintf (locbuf
, "sigcode %u", sip
-> si_signo
);
756 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
758 if ((scp
-> signo
== sip
-> si_signo
) &&
759 (scp
-> code
== sip
-> si_code
))
767 desc
= "Unrecognized signal or trap use";
776 syscallname - translate a system call number into a system call name
780 char *syscallname (int syscallnum)
784 Given a system call number, translate it into the printable name
785 of a system call, or into "syscall <num>" if it is an unknown
790 syscallname (syscallnum
)
793 static char locbuf
[32];
796 if (syscallnum
>= 0 && syscallnum
< MAX_SYSCALLS
)
798 rtnval
= syscall_table
[syscallnum
];
802 sprintf (locbuf
, "syscall %u", syscallnum
);
812 init_syscall_table - initialize syscall translation table
816 void init_syscall_table (void)
820 Dynamically initialize the translation table to convert system
821 call numbers into printable system call names. Done once per
822 gdb run, on initialization.
826 This is awfully ugly, but preprocessor tricks to make it prettier
827 tend to be nonportable.
831 init_syscall_table ()
833 #if defined (SYS_exit)
834 syscall_table
[SYS_exit
] = "exit";
836 #if defined (SYS_fork)
837 syscall_table
[SYS_fork
] = "fork";
839 #if defined (SYS_read)
840 syscall_table
[SYS_read
] = "read";
842 #if defined (SYS_write)
843 syscall_table
[SYS_write
] = "write";
845 #if defined (SYS_open)
846 syscall_table
[SYS_open
] = "open";
848 #if defined (SYS_close)
849 syscall_table
[SYS_close
] = "close";
851 #if defined (SYS_wait)
852 syscall_table
[SYS_wait
] = "wait";
854 #if defined (SYS_creat)
855 syscall_table
[SYS_creat
] = "creat";
857 #if defined (SYS_link)
858 syscall_table
[SYS_link
] = "link";
860 #if defined (SYS_unlink)
861 syscall_table
[SYS_unlink
] = "unlink";
863 #if defined (SYS_exec)
864 syscall_table
[SYS_exec
] = "exec";
866 #if defined (SYS_execv)
867 syscall_table
[SYS_execv
] = "execv";
869 #if defined (SYS_execve)
870 syscall_table
[SYS_execve
] = "execve";
872 #if defined (SYS_chdir)
873 syscall_table
[SYS_chdir
] = "chdir";
875 #if defined (SYS_time)
876 syscall_table
[SYS_time
] = "time";
878 #if defined (SYS_mknod)
879 syscall_table
[SYS_mknod
] = "mknod";
881 #if defined (SYS_chmod)
882 syscall_table
[SYS_chmod
] = "chmod";
884 #if defined (SYS_chown)
885 syscall_table
[SYS_chown
] = "chown";
887 #if defined (SYS_brk)
888 syscall_table
[SYS_brk
] = "brk";
890 #if defined (SYS_stat)
891 syscall_table
[SYS_stat
] = "stat";
893 #if defined (SYS_lseek)
894 syscall_table
[SYS_lseek
] = "lseek";
896 #if defined (SYS_getpid)
897 syscall_table
[SYS_getpid
] = "getpid";
899 #if defined (SYS_mount)
900 syscall_table
[SYS_mount
] = "mount";
902 #if defined (SYS_umount)
903 syscall_table
[SYS_umount
] = "umount";
905 #if defined (SYS_setuid)
906 syscall_table
[SYS_setuid
] = "setuid";
908 #if defined (SYS_getuid)
909 syscall_table
[SYS_getuid
] = "getuid";
911 #if defined (SYS_stime)
912 syscall_table
[SYS_stime
] = "stime";
914 #if defined (SYS_ptrace)
915 syscall_table
[SYS_ptrace
] = "ptrace";
917 #if defined (SYS_alarm)
918 syscall_table
[SYS_alarm
] = "alarm";
920 #if defined (SYS_fstat)
921 syscall_table
[SYS_fstat
] = "fstat";
923 #if defined (SYS_pause)
924 syscall_table
[SYS_pause
] = "pause";
926 #if defined (SYS_utime)
927 syscall_table
[SYS_utime
] = "utime";
929 #if defined (SYS_stty)
930 syscall_table
[SYS_stty
] = "stty";
932 #if defined (SYS_gtty)
933 syscall_table
[SYS_gtty
] = "gtty";
935 #if defined (SYS_access)
936 syscall_table
[SYS_access
] = "access";
938 #if defined (SYS_nice)
939 syscall_table
[SYS_nice
] = "nice";
941 #if defined (SYS_statfs)
942 syscall_table
[SYS_statfs
] = "statfs";
944 #if defined (SYS_sync)
945 syscall_table
[SYS_sync
] = "sync";
947 #if defined (SYS_kill)
948 syscall_table
[SYS_kill
] = "kill";
950 #if defined (SYS_fstatfs)
951 syscall_table
[SYS_fstatfs
] = "fstatfs";
953 #if defined (SYS_pgrpsys)
954 syscall_table
[SYS_pgrpsys
] = "pgrpsys";
956 #if defined (SYS_xenix)
957 syscall_table
[SYS_xenix
] = "xenix";
959 #if defined (SYS_dup)
960 syscall_table
[SYS_dup
] = "dup";
962 #if defined (SYS_pipe)
963 syscall_table
[SYS_pipe
] = "pipe";
965 #if defined (SYS_times)
966 syscall_table
[SYS_times
] = "times";
968 #if defined (SYS_profil)
969 syscall_table
[SYS_profil
] = "profil";
971 #if defined (SYS_plock)
972 syscall_table
[SYS_plock
] = "plock";
974 #if defined (SYS_setgid)
975 syscall_table
[SYS_setgid
] = "setgid";
977 #if defined (SYS_getgid)
978 syscall_table
[SYS_getgid
] = "getgid";
980 #if defined (SYS_signal)
981 syscall_table
[SYS_signal
] = "signal";
983 #if defined (SYS_msgsys)
984 syscall_table
[SYS_msgsys
] = "msgsys";
986 #if defined (SYS_sys3b)
987 syscall_table
[SYS_sys3b
] = "sys3b";
989 #if defined (SYS_acct)
990 syscall_table
[SYS_acct
] = "acct";
992 #if defined (SYS_shmsys)
993 syscall_table
[SYS_shmsys
] = "shmsys";
995 #if defined (SYS_semsys)
996 syscall_table
[SYS_semsys
] = "semsys";
998 #if defined (SYS_ioctl)
999 syscall_table
[SYS_ioctl
] = "ioctl";
1001 #if defined (SYS_uadmin)
1002 syscall_table
[SYS_uadmin
] = "uadmin";
1004 #if defined (SYS_utssys)
1005 syscall_table
[SYS_utssys
] = "utssys";
1007 #if defined (SYS_fsync)
1008 syscall_table
[SYS_fsync
] = "fsync";
1010 #if defined (SYS_umask)
1011 syscall_table
[SYS_umask
] = "umask";
1013 #if defined (SYS_chroot)
1014 syscall_table
[SYS_chroot
] = "chroot";
1016 #if defined (SYS_fcntl)
1017 syscall_table
[SYS_fcntl
] = "fcntl";
1019 #if defined (SYS_ulimit)
1020 syscall_table
[SYS_ulimit
] = "ulimit";
1022 #if defined (SYS_rfsys)
1023 syscall_table
[SYS_rfsys
] = "rfsys";
1025 #if defined (SYS_rmdir)
1026 syscall_table
[SYS_rmdir
] = "rmdir";
1028 #if defined (SYS_mkdir)
1029 syscall_table
[SYS_mkdir
] = "mkdir";
1031 #if defined (SYS_getdents)
1032 syscall_table
[SYS_getdents
] = "getdents";
1034 #if defined (SYS_sysfs)
1035 syscall_table
[SYS_sysfs
] = "sysfs";
1037 #if defined (SYS_getmsg)
1038 syscall_table
[SYS_getmsg
] = "getmsg";
1040 #if defined (SYS_putmsg)
1041 syscall_table
[SYS_putmsg
] = "putmsg";
1043 #if defined (SYS_poll)
1044 syscall_table
[SYS_poll
] = "poll";
1046 #if defined (SYS_lstat)
1047 syscall_table
[SYS_lstat
] = "lstat";
1049 #if defined (SYS_symlink)
1050 syscall_table
[SYS_symlink
] = "symlink";
1052 #if defined (SYS_readlink)
1053 syscall_table
[SYS_readlink
] = "readlink";
1055 #if defined (SYS_setgroups)
1056 syscall_table
[SYS_setgroups
] = "setgroups";
1058 #if defined (SYS_getgroups)
1059 syscall_table
[SYS_getgroups
] = "getgroups";
1061 #if defined (SYS_fchmod)
1062 syscall_table
[SYS_fchmod
] = "fchmod";
1064 #if defined (SYS_fchown)
1065 syscall_table
[SYS_fchown
] = "fchown";
1067 #if defined (SYS_sigprocmask)
1068 syscall_table
[SYS_sigprocmask
] = "sigprocmask";
1070 #if defined (SYS_sigsuspend)
1071 syscall_table
[SYS_sigsuspend
] = "sigsuspend";
1073 #if defined (SYS_sigaltstack)
1074 syscall_table
[SYS_sigaltstack
] = "sigaltstack";
1076 #if defined (SYS_sigaction)
1077 syscall_table
[SYS_sigaction
] = "sigaction";
1079 #if defined (SYS_sigpending)
1080 syscall_table
[SYS_sigpending
] = "sigpending";
1082 #if defined (SYS_context)
1083 syscall_table
[SYS_context
] = "context";
1085 #if defined (SYS_evsys)
1086 syscall_table
[SYS_evsys
] = "evsys";
1088 #if defined (SYS_evtrapret)
1089 syscall_table
[SYS_evtrapret
] = "evtrapret";
1091 #if defined (SYS_statvfs)
1092 syscall_table
[SYS_statvfs
] = "statvfs";
1094 #if defined (SYS_fstatvfs)
1095 syscall_table
[SYS_fstatvfs
] = "fstatvfs";
1097 #if defined (SYS_nfssys)
1098 syscall_table
[SYS_nfssys
] = "nfssys";
1100 #if defined (SYS_waitsys)
1101 syscall_table
[SYS_waitsys
] = "waitsys";
1103 #if defined (SYS_sigsendsys)
1104 syscall_table
[SYS_sigsendsys
] = "sigsendsys";
1106 #if defined (SYS_hrtsys)
1107 syscall_table
[SYS_hrtsys
] = "hrtsys";
1109 #if defined (SYS_acancel)
1110 syscall_table
[SYS_acancel
] = "acancel";
1112 #if defined (SYS_async)
1113 syscall_table
[SYS_async
] = "async";
1115 #if defined (SYS_priocntlsys)
1116 syscall_table
[SYS_priocntlsys
] = "priocntlsys";
1118 #if defined (SYS_pathconf)
1119 syscall_table
[SYS_pathconf
] = "pathconf";
1121 #if defined (SYS_mincore)
1122 syscall_table
[SYS_mincore
] = "mincore";
1124 #if defined (SYS_mmap)
1125 syscall_table
[SYS_mmap
] = "mmap";
1127 #if defined (SYS_mprotect)
1128 syscall_table
[SYS_mprotect
] = "mprotect";
1130 #if defined (SYS_munmap)
1131 syscall_table
[SYS_munmap
] = "munmap";
1133 #if defined (SYS_fpathconf)
1134 syscall_table
[SYS_fpathconf
] = "fpathconf";
1136 #if defined (SYS_vfork)
1137 syscall_table
[SYS_vfork
] = "vfork";
1139 #if defined (SYS_fchdir)
1140 syscall_table
[SYS_fchdir
] = "fchdir";
1142 #if defined (SYS_readv)
1143 syscall_table
[SYS_readv
] = "readv";
1145 #if defined (SYS_writev)
1146 syscall_table
[SYS_writev
] = "writev";
1148 #if defined (SYS_xstat)
1149 syscall_table
[SYS_xstat
] = "xstat";
1151 #if defined (SYS_lxstat)
1152 syscall_table
[SYS_lxstat
] = "lxstat";
1154 #if defined (SYS_fxstat)
1155 syscall_table
[SYS_fxstat
] = "fxstat";
1157 #if defined (SYS_xmknod)
1158 syscall_table
[SYS_xmknod
] = "xmknod";
1160 #if defined (SYS_clocal)
1161 syscall_table
[SYS_clocal
] = "clocal";
1163 #if defined (SYS_setrlimit)
1164 syscall_table
[SYS_setrlimit
] = "setrlimit";
1166 #if defined (SYS_getrlimit)
1167 syscall_table
[SYS_getrlimit
] = "getrlimit";
1169 #if defined (SYS_lchown)
1170 syscall_table
[SYS_lchown
] = "lchown";
1172 #if defined (SYS_memcntl)
1173 syscall_table
[SYS_memcntl
] = "memcntl";
1175 #if defined (SYS_getpmsg)
1176 syscall_table
[SYS_getpmsg
] = "getpmsg";
1178 #if defined (SYS_putpmsg)
1179 syscall_table
[SYS_putpmsg
] = "putpmsg";
1181 #if defined (SYS_rename)
1182 syscall_table
[SYS_rename
] = "rename";
1184 #if defined (SYS_uname)
1185 syscall_table
[SYS_uname
] = "uname";
1187 #if defined (SYS_setegid)
1188 syscall_table
[SYS_setegid
] = "setegid";
1190 #if defined (SYS_sysconfig)
1191 syscall_table
[SYS_sysconfig
] = "sysconfig";
1193 #if defined (SYS_adjtime)
1194 syscall_table
[SYS_adjtime
] = "adjtime";
1196 #if defined (SYS_systeminfo)
1197 syscall_table
[SYS_systeminfo
] = "systeminfo";
1199 #if defined (SYS_seteuid)
1200 syscall_table
[SYS_seteuid
] = "seteuid";
1202 #if defined (SYS_sproc)
1203 syscall_table
[SYS_sproc
] = "sproc";
1211 ptrace -- override library version to force errors for /proc version
1215 int ptrace (int request, int pid, PTRACE_ARG3_TYPE arg3, int arg4)
1219 When gdb is configured to use /proc, it should not be calling
1220 or otherwise attempting to use ptrace. In order to catch errors
1221 where use of /proc is configured, but some routine is still calling
1222 ptrace, we provide a local version of a function with that name
1223 that does nothing but issue an error message.
1227 ptrace (request
, pid
, arg3
, arg4
)
1230 PTRACE_ARG3_TYPE arg3
;
1233 error ("internal error - there is a call to ptrace() somewhere");
1241 procfs_kill_inferior - kill any currently inferior
1245 void procfs_kill_inferior (void)
1249 Kill any current inferior.
1253 Kills even attached inferiors. Presumably the user has already
1254 been prompted that the inferior is an attached one rather than
1255 one started by gdb. (FIXME?)
1260 procfs_kill_inferior ()
1262 target_mourn_inferior ();
1269 unconditionally_kill_inferior - terminate the inferior
1273 static void unconditionally_kill_inferior (struct procinfo *)
1277 Kill the specified inferior.
1281 A possibly useful enhancement would be to first try sending
1282 the inferior a terminate signal, politely asking it to commit
1283 suicide, before we murder it (we could call that
1284 politely_kill_inferior()).
1289 unconditionally_kill_inferior (pi
)
1290 struct procinfo
*pi
;
1295 ppid
= pi
->prstatus
.pr_ppid
;
1298 ioctl (pi
->fd
, PIOCKILL
, &signo
);
1299 close_proc_file (pi
);
1301 /* Only wait() for our direct children. Our grandchildren zombies are killed
1302 by the death of their parents. */
1304 if (ppid
== getpid())
1312 procfs_xfer_memory -- copy data to or from inferior memory space
1316 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1317 int dowrite, struct target_ops target)
1321 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1322 from/to debugger memory starting at MYADDR. Copy from inferior
1323 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1325 Returns the length copied, which is either the LEN argument or
1326 zero. This xfer function does not do partial moves, since procfs_ops
1327 doesn't allow memory operations to cross below us in the target stack
1332 The /proc interface makes this an almost trivial task.
1336 procfs_xfer_memory (memaddr
, myaddr
, len
, dowrite
, target
)
1341 struct target_ops
*target
; /* ignored */
1344 struct procinfo
*pi
;
1346 pi
= current_procinfo
;
1348 if (lseek(pi
->fd
, (off_t
) memaddr
, 0) == (off_t
) memaddr
)
1352 nbytes
= write (pi
->fd
, myaddr
, len
);
1356 nbytes
= read (pi
->fd
, myaddr
, len
);
1370 procfs_store_registers -- copy register values back to inferior
1374 void procfs_store_registers (int regno)
1378 Store our current register values back into the inferior. If
1379 REGNO is -1 then store all the register, otherwise store just
1380 the value specified by REGNO.
1384 If we are storing only a single register, we first have to get all
1385 the current values from the process, overwrite the desired register
1386 in the gregset with the one we want from gdb's registers, and then
1387 send the whole set back to the process. For writing all the
1388 registers, all we have to do is generate the gregset and send it to
1391 Also note that the process has to be stopped on an event of interest
1392 for this to work, which basically means that it has to have been
1393 run under the control of one of the other /proc ioctl calls and not
1394 ptrace. Since we don't use ptrace anyway, we don't worry about this
1395 fine point, but it is worth noting for future reference.
1397 Gdb is confused about what this function is supposed to return.
1398 Some versions return a value, others return nothing. Some are
1399 declared to return a value and actually return nothing. Gdb ignores
1400 anything returned. (FIXME)
1405 procfs_store_registers (regno
)
1408 struct procinfo
*pi
;
1410 pi
= current_procinfo
;
1414 ioctl (pi
->fd
, PIOCGREG
, &pi
->gregset
);
1416 fill_gregset (&pi
->gregset
, regno
);
1417 ioctl (pi
->fd
, PIOCSREG
, &pi
->gregset
);
1419 #if defined (FP0_REGNUM)
1421 /* Now repeat everything using the floating point register set, if the
1422 target has floating point hardware. Since we ignore the returned value,
1423 we'll never know whether it worked or not anyway. */
1427 ioctl (pi
->fd
, PIOCGFPREG
, &pi
->fpregset
);
1429 fill_fpregset (&pi
->fpregset
, regno
);
1430 ioctl (pi
->fd
, PIOCSFPREG
, &pi
->fpregset
);
1432 #endif /* FP0_REGNUM */
1440 create_procinfo - initialize access to a /proc entry
1444 void create_procinfo (int pid)
1448 Allocate a procinfo structure, open the /proc file and then sets up
1449 the set of signals and faults that are to be traced.
1453 If proc_init_failed ever gets called, control returns to the command
1454 processing loop via the standard error handling code.
1459 create_procinfo (pid
)
1462 struct procinfo
*pi
;
1464 if (find_procinfo (pid
, 1))
1465 return; /* All done! It already exists */
1467 pi
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
1469 if (!open_proc_file (pid
, pi
, O_RDWR
))
1470 proc_init_failed (pi
, "can't open process file");
1472 /* Add new process to process info list */
1474 pi
->next
= procinfo_list
;
1477 add_fd (pi
); /* Add to list for poll/select */
1479 memset ((char *) &pi
->prrun
, 0, sizeof (pi
->prrun
));
1480 prfillset (&pi
->prrun
.pr_trace
);
1481 procfs_notice_signals (pid
);
1482 prfillset (&pi
->prrun
.pr_fault
);
1483 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
1485 if (ioctl (pi
->fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
1486 proc_init_failed (pi
, "PIOCWSTOP failed");
1488 if (ioctl (pi
->fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
) < 0)
1489 proc_init_failed (pi
, "PIOCSFAULT failed");
1496 procfs_init_inferior - initialize target vector and access to a
1501 void procfs_init_inferior (int pid)
1505 When gdb starts an inferior, this function is called in the parent
1506 process immediately after the fork. It waits for the child to stop
1507 on the return from the exec system call (the child itself takes care
1508 of ensuring that this is set up), then sets up the set of signals
1509 and faults that are to be traced.
1513 If proc_init_failed ever gets called, control returns to the command
1514 processing loop via the standard error handling code.
1519 procfs_init_inferior (pid
)
1522 push_target (&procfs_ops
);
1524 create_procinfo (pid
);
1525 add_thread (pid
); /* Setup initial thread */
1532 procfs_notice_signals
1536 static void procfs_notice_signals (int pid);
1540 When the user changes the state of gdb's signal handling via the
1541 "handle" command, this function gets called to see if any change
1542 in the /proc interface is required. It is also called internally
1543 by other /proc interface functions to initialize the state of
1544 the traced signal set.
1546 One thing it does is that signals for which the state is "nostop",
1547 "noprint", and "pass", have their trace bits reset in the pr_trace
1548 field, so that they are no longer traced. This allows them to be
1549 delivered directly to the inferior without the debugger ever being
1554 procfs_notice_signals (pid
)
1558 struct procinfo
*pi
;
1560 pi
= find_procinfo (pid
, 0);
1562 for (signo
= 0; signo
< NSIG
; signo
++)
1564 if (signal_stop_state (signo
) == 0 &&
1565 signal_print_state (signo
) == 0 &&
1566 signal_pass_state (signo
) == 1)
1568 prdelset (&pi
->prrun
.pr_trace
, signo
);
1572 praddset (&pi
->prrun
.pr_trace
, signo
);
1575 if (ioctl (pi
->fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
1577 print_sys_errmsg ("PIOCSTRACE failed", errno
);
1585 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1589 void proc_set_exec_trap (void)
1593 This function is called in the child process when starting up
1594 an inferior, prior to doing the exec of the actual inferior.
1595 It sets the child process's exitset to make exit from the exec
1596 system call an event of interest to stop on, and then simply
1597 returns. The child does the exec, the system call returns, and
1598 the child stops at the first instruction, ready for the gdb
1599 parent process to take control of it.
1603 We need to use all local variables since the child may be sharing
1604 it's data space with the parent, if vfork was used rather than
1607 Also note that we want to turn off the inherit-on-fork flag in
1608 the child process so that any grand-children start with all
1609 tracing flags cleared.
1613 proc_set_exec_trap ()
1617 auto char procname
[32];
1620 sprintf (procname
, PROC_NAME_FMT
, getpid ());
1621 if ((fd
= open (procname
, O_RDWR
)) < 0)
1627 premptyset (&exitset
);
1628 premptyset (&entryset
);
1631 Not all systems with /proc have all the exec* syscalls with the same
1632 names. On the SGI, for example, there is no SYS_exec, but there
1633 *is* a SYS_execv. So, we try to account for that. */
1636 praddset (&exitset
, SYS_exec
);
1639 praddset (&exitset
, SYS_execve
);
1642 praddset (&exitset
, SYS_execv
);
1645 if (ioctl (fd
, PIOCSEXIT
, &exitset
) < 0)
1652 praddset (&entryset
, SYS_exit
);
1654 if (ioctl (fd
, PIOCSENTRY
, &entryset
) < 0)
1661 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1662 start with tracing flags cleared. */
1664 #if defined (PIOCRESET) /* New method */
1668 ioctl (fd
, PIOCRESET
, &pr_flags
);
1671 #if defined (PIOCRFORK) /* Original method */
1672 ioctl (fd
, PIOCRFORK
, NULL
);
1676 /* Turn on run-on-last-close flag so that this process will not hang
1677 if GDB goes away for some reason. */
1679 #if defined (PIOCSET) /* New method */
1683 (void) ioctl (fd
, PIOCSET
, &pr_flags
);
1686 #if defined (PIOCSRLC) /* Original method */
1687 (void) ioctl (fd
, PIOCSRLC
, 0);
1696 proc_iterate_over_mappings -- call function for every mapped space
1700 int proc_iterate_over_mappings (int (*func)())
1704 Given a pointer to a function, call that function for every
1705 mapped address space, passing it an open file descriptor for
1706 the file corresponding to that mapped address space (if any)
1707 and the base address of the mapped space. Quit when we hit
1708 the end of the mappings or the function returns nonzero.
1712 proc_iterate_over_mappings (func
)
1713 int (*func
) PARAMS ((int, CORE_ADDR
));
1718 struct prmap
*prmaps
;
1719 struct prmap
*prmap
;
1720 struct procinfo
*pi
;
1722 pi
= current_procinfo
;
1724 if (ioctl (pi
->fd
, PIOCNMAP
, &nmap
) == 0)
1726 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
1727 if (ioctl (pi
->fd
, PIOCMAP
, prmaps
) == 0)
1729 for (prmap
= prmaps
; prmap
-> pr_size
&& funcstat
== 0; ++prmap
)
1731 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
-> pr_vaddr
, 0);
1732 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
-> pr_vaddr
);
1740 #if 0 /* Currently unused */
1745 proc_base_address -- find base address for segment containing address
1749 CORE_ADDR proc_base_address (CORE_ADDR addr)
1753 Given an address of a location in the inferior, find and return
1754 the base address of the mapped segment containing that address.
1756 This is used for example, by the shared library support code,
1757 where we have the pc value for some location in the shared library
1758 where we are stopped, and need to know the base address of the
1759 segment containing that address.
1763 proc_base_address (addr
)
1767 struct prmap
*prmaps
;
1768 struct prmap
*prmap
;
1769 CORE_ADDR baseaddr
= 0;
1770 struct procinfo
*pi
;
1772 pi
= current_procinfo
;
1774 if (ioctl (pi
->fd
, PIOCNMAP
, &nmap
) == 0)
1776 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
1777 if (ioctl (pi
->fd
, PIOCMAP
, prmaps
) == 0)
1779 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
1781 if ((prmap
-> pr_vaddr
<= (caddr_t
) addr
) &&
1782 (prmap
-> pr_vaddr
+ prmap
-> pr_size
> (caddr_t
) addr
))
1784 baseaddr
= (CORE_ADDR
) prmap
-> pr_vaddr
;
1799 proc_address_to_fd -- return open fd for file mapped to address
1803 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1807 Given an address in the current inferior's address space, use the
1808 /proc interface to find an open file descriptor for the file that
1809 this address was mapped in from. Return -1 if there is no current
1810 inferior. Print a warning message if there is an inferior but
1811 the address corresponds to no file (IE a bogus address).
1816 proc_address_to_fd (pi
, addr
, complain
)
1817 struct procinfo
*pi
;
1823 if ((fd
= ioctl (pi
->fd
, PIOCOPENM
, (caddr_t
*) &addr
)) < 0)
1827 print_sys_errmsg (pi
->pathname
, errno
);
1828 warning ("can't find mapped file for address 0x%x", addr
);
1835 /* Attach to process PID, then initialize for debugging it
1836 and wait for the trace-trap that results from attaching. */
1839 procfs_attach (args
, from_tty
)
1847 error_no_arg ("process-id to attach");
1851 if (pid
== getpid()) /* Trying to masturbate? */
1852 error ("I refuse to debug myself!");
1856 exec_file
= (char *) get_exec_file (0);
1859 printf ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
1861 printf ("Attaching to %s\n", target_pid_to_str (pid
));
1868 push_target (&procfs_ops
);
1872 /* Take a program previously attached to and detaches it.
1873 The program resumes execution and will no longer stop
1874 on signals, etc. We'd better not have left any breakpoints
1875 in the program or it'll die when it hits one. For this
1876 to work, it may be necessary for the process to have been
1877 previously attached. It *might* work if the program was
1878 started via the normal ptrace (PTRACE_TRACEME). */
1881 procfs_detach (args
, from_tty
)
1889 char *exec_file
= get_exec_file (0);
1892 printf ("Detaching from program: %s %s\n",
1893 exec_file
, target_pid_to_str (inferior_pid
));
1897 siggnal
= atoi (args
);
1899 do_detach (siggnal
);
1901 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
1904 /* Get ready to modify the registers array. On machines which store
1905 individual registers, this doesn't need to do anything. On machines
1906 which store all the registers in one fell swoop, this makes sure
1907 that registers contains all the registers from the program being
1911 procfs_prepare_to_store ()
1913 #ifdef CHILD_PREPARE_TO_STORE
1914 CHILD_PREPARE_TO_STORE ();
1918 /* Print status information about what we're accessing. */
1921 procfs_files_info (ignore
)
1922 struct target_ops
*ignore
;
1924 printf ("\tUsing the running image of %s %s via /proc.\n",
1925 attach_flag
? "attached": "child", target_pid_to_str (inferior_pid
));
1930 procfs_open (arg
, from_tty
)
1934 error ("Use the \"run\" command to start a Unix child process.");
1941 do_attach -- attach to an already existing process
1945 int do_attach (int pid)
1949 Attach to an already existing process with the specified process
1950 id. If the process is not already stopped, query whether to
1955 The option of stopping at attach time is specific to the /proc
1956 versions of gdb. Versions using ptrace force the attachee
1957 to stop. (I have changed this version to do so, too. All you
1958 have to do is "continue" to make it go on. -- gnu@cygnus.com)
1967 struct procinfo
*pi
;
1969 pi
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
1971 if (!open_proc_file (pid
, pi
, O_RDWR
))
1974 perror_with_name (pi
->pathname
);
1978 /* Add new process to process info list */
1980 pi
->next
= procinfo_list
;
1983 add_fd (pi
); /* Add to list for poll/select */
1985 /* Get current status of process and if it is not already stopped,
1986 then stop it. Remember whether or not it was stopped when we first
1989 if (ioctl (pi
->fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
1991 print_sys_errmsg (pi
->pathname
, errno
);
1992 close_proc_file (pi
);
1993 error ("PIOCSTATUS failed");
1995 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
1997 pi
->was_stopped
= 1;
2001 pi
->was_stopped
= 0;
2002 if (1 || query ("Process is currently running, stop it? "))
2004 /* Make it run again when we close it. */
2005 #if defined (PIOCSET) /* New method */
2009 result
= ioctl (pi
->fd
, PIOCSET
, &pr_flags
);
2012 #if defined (PIOCSRLC) /* Original method */
2013 result
= ioctl (pi
->fd
, PIOCSRLC
, 0);
2018 print_sys_errmsg (pi
->pathname
, errno
);
2019 close_proc_file (pi
);
2020 error ("PIOCSRLC or PIOCSET failed");
2022 if (ioctl (pi
->fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
2024 print_sys_errmsg (pi
->pathname
, errno
);
2025 close_proc_file (pi
);
2026 error ("PIOCSTOP failed");
2028 pi
->nopass_next_sigstop
= 1;
2032 printf ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid
));
2036 /* Remember some things about the inferior that we will, or might, change
2037 so that we can restore them when we detach. */
2039 ioctl (pi
->fd
, PIOCGTRACE
, &pi
->saved_trace
);
2040 ioctl (pi
->fd
, PIOCGHOLD
, &pi
->saved_sighold
);
2041 ioctl (pi
->fd
, PIOCGFAULT
, &pi
->saved_fltset
);
2042 ioctl (pi
->fd
, PIOCGENTRY
, &pi
->saved_entryset
);
2043 ioctl (pi
->fd
, PIOCGEXIT
, &pi
->saved_exitset
);
2045 /* Set up trace and fault sets, as gdb expects them. */
2047 memset (&pi
->prrun
, 0, sizeof (pi
->prrun
));
2048 prfillset (&pi
->prrun
.pr_trace
);
2049 procfs_notice_signals (pid
);
2050 prfillset (&pi
->prrun
.pr_fault
);
2051 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
2052 if (ioctl (pi
->fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
2054 print_sys_errmsg ("PIOCSFAULT failed", errno
);
2056 if (ioctl (pi
->fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
2058 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2068 do_detach -- detach from an attached-to process
2072 void do_detach (int signal)
2076 Detach from the current attachee.
2078 If signal is non-zero, the attachee is started running again and sent
2079 the specified signal.
2081 If signal is zero and the attachee was not already stopped when we
2082 attached to it, then we make it runnable again when we detach.
2084 Otherwise, we query whether or not to make the attachee runnable
2085 again, since we may simply want to leave it in the state it was in
2088 We report any problems, but do not consider them errors, since we
2089 MUST detach even if some things don't seem to go right. This may not
2090 be the ideal situation. (FIXME).
2098 struct procinfo
*pi
;
2100 pi
= current_procinfo
;
2104 set_proc_siginfo (pi
, signal
);
2106 if (ioctl (pi
->fd
, PIOCSEXIT
, &pi
->saved_exitset
) < 0)
2108 print_sys_errmsg (pi
->pathname
, errno
);
2109 printf ("PIOCSEXIT failed.\n");
2111 if (ioctl (pi
->fd
, PIOCSENTRY
, &pi
->saved_entryset
) < 0)
2113 print_sys_errmsg (pi
->pathname
, errno
);
2114 printf ("PIOCSENTRY failed.\n");
2116 if (ioctl (pi
->fd
, PIOCSTRACE
, &pi
->saved_trace
) < 0)
2118 print_sys_errmsg (pi
->pathname
, errno
);
2119 printf ("PIOCSTRACE failed.\n");
2121 if (ioctl (pi
->fd
, PIOCSHOLD
, &pi
->saved_sighold
) < 0)
2123 print_sys_errmsg (pi
->pathname
, errno
);
2124 printf ("PIOSCHOLD failed.\n");
2126 if (ioctl (pi
->fd
, PIOCSFAULT
, &pi
->saved_fltset
) < 0)
2128 print_sys_errmsg (pi
->pathname
, errno
);
2129 printf ("PIOCSFAULT failed.\n");
2131 if (ioctl (pi
->fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
2133 print_sys_errmsg (pi
->pathname
, errno
);
2134 printf ("PIOCSTATUS failed.\n");
2138 if (signal
|| (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
2140 if (signal
|| !pi
->was_stopped
||
2141 query ("Was stopped when attached, make it runnable again? "))
2143 /* Clear any fault that might have stopped it. */
2144 if (ioctl (pi
->fd
, PIOCCFAULT
, 0))
2146 print_sys_errmsg (pi
->pathname
, errno
);
2147 printf ("PIOCCFAULT failed.\n");
2150 /* Make it run again when we close it. */
2151 #if defined (PIOCSET) /* New method */
2155 result
= ioctl (pi
->fd
, PIOCSET
, &pr_flags
);
2158 #if defined (PIOCSRLC) /* Original method */
2159 result
= ioctl (pi
->fd
, PIOCSRLC
, 0);
2164 print_sys_errmsg (pi
->pathname
, errno
);
2165 printf ("PIOCSRLC or PIOCSET failed.\n");
2170 close_proc_file (pi
);
2178 procfs_wait -- emulate wait() as much as possible
2179 Wait for child to do something. Return pid of child, or -1 in case
2180 of error; store status through argument pointer STATUS.
2185 int procfs_wait (int pid, int *statloc)
2189 Try to emulate wait() as much as possible. Not sure why we can't
2190 just use wait(), but it seems to have problems when applied to a
2191 process being controlled with the /proc interface.
2195 We have a race problem here with no obvious solution. We need to let
2196 the inferior run until it stops on an event of interest, which means
2197 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2198 ioctl if the process is already stopped on something that is not an
2199 event of interest, or the call will hang indefinitely. Thus we first
2200 use PIOCSTATUS to see if the process is not stopped. If not, then we
2201 use PIOCWSTOP. But during the window between the two, if the process
2202 stops for any reason that is not an event of interest (such as a job
2203 control signal) then gdb will hang. One possible workaround is to set
2204 an alarm to wake up every minute of so and check to see if the process
2205 is still running, and if so, then reissue the PIOCWSTOP. But this is
2206 a real kludge, so has not been implemented. FIXME: investigate
2209 FIXME: Investigate why wait() seems to have problems with programs
2210 being control by /proc routines.
2215 procfs_wait (pid
, statloc
)
2224 struct procinfo
*pi
;
2226 if (pid
!= -1) /* Non-specific process? */
2229 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
2239 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
2240 if (pi
->pid
== pid
&& pi
->had_event
)
2243 if (!pi
&& !checkerr
)
2246 if (!checkerr
&& !(pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
2248 if (ioctl (pi
->fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
2255 if (errno
== ENOENT
)
2257 rtnval
= wait (&statval
);
2258 if (rtnval
!= inferior_pid
)
2260 print_sys_errmsg (pi
->pathname
, errno
);
2261 error ("PIOCWSTOP, wait failed, returned %d", rtnval
);
2267 print_sys_errmsg (pi
->pathname
, errno
);
2268 error ("PIOCSTATUS or PIOCWSTOP failed.");
2272 else if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
2274 rtnval
= pi
->prstatus
.pr_pid
;
2275 why
= pi
->prstatus
.pr_why
;
2276 what
= pi
->prstatus
.pr_what
;
2281 statval
= (what
<< 8) | 0177;
2284 if (what
!= SYS_exit
)
2285 error ("PR_SYSENTRY, unknown system call %d", what
);
2287 pi
->prrun
.pr_flags
= PRCFAULT
;
2289 if (ioctl (pi
->fd
, PIOCRUN
, &pi
->prrun
) != 0)
2290 perror_with_name (pi
->pathname
);
2292 rtnval
= wait (&statval
);
2307 statval
= (SIGTRAP
<< 8) | 0177;
2311 /* We've just detected the completion of an sproc system call. Now we need to
2312 setup a procinfo struct for this thread, and notify the thread system of the
2315 /* If sproc failed, then nothing interesting happened. Continue the process and
2316 go back to sleep. */
2318 if (pi
->prstatus
.pr_errno
!= 0)
2320 pi
->prrun
.pr_flags
&= PRSTEP
;
2321 pi
->prrun
.pr_flags
|= PRCFAULT
;
2323 if (ioctl (pi
->fd
, PIOCRUN
, &pi
->prrun
) != 0)
2324 perror_with_name (pi
->pathname
);
2329 /* At this point, the new thread is stopped at it's first instruction, and
2330 the parent is stopped at the exit from sproc. */
2332 /* Notify the caller of the arrival of a new thread. */
2333 create_procinfo (pi
->prstatus
.pr_rval1
);
2335 rtnval
= pi
->prstatus
.pr_rval1
;
2336 statval
= (SIGTRAP
<< 8) | 0177;
2339 #endif /* SYS_sproc */
2342 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what
);
2346 statval
= (SIGSTOP
<< 8) | 0177;
2349 statval
= (what
<< 8) | 0177;
2356 statval
= (SIGILL
<< 8) | 0177;
2360 statval
= (SIGTRAP
<< 8) | 0177;
2365 statval
= (SIGSEGV
<< 8) | 0177;
2370 statval
= (SIGFPE
<< 8) | 0177;
2372 case FLTPAGE
: /* Recoverable page fault */
2374 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
2378 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
2380 /* Stop all the other threads when any of them stops. */
2383 struct procinfo
*procinfo
;
2385 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
2387 if (!procinfo
->had_event
)
2388 if (ioctl (procinfo
->fd
, PIOCSTOP
, &procinfo
->prstatus
) < 0)
2390 print_sys_errmsg (procinfo
->pathname
, errno
);
2391 error ("PIOCSTOP failed");
2398 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2399 pi
->prstatus
.pr_flags
);
2407 if (rtnval
== -1) /* No more children to wait for */
2409 fprintf (stderr
, "Child process unexpectedly missing.\n");
2410 *statloc
= 42; /* Claim it exited with signal 42 */
2414 pi
->had_event
= 0; /* Indicate that we've seen this one */
2422 set_proc_siginfo - set a process's current signal info
2426 void set_proc_siginfo (struct procinfo *pip, int signo);
2430 Given a pointer to a process info struct in PIP and a signal number
2431 in SIGNO, set the process's current signal and its associated signal
2432 information. The signal will be delivered to the process immediately
2433 after execution is resumed, even if it is being held. In addition,
2434 this particular delivery will not cause another PR_SIGNALLED stop
2435 even if the signal is being traced.
2437 If we are not delivering the same signal that the prstatus siginfo
2438 struct contains information about, then synthesize a siginfo struct
2439 to match the signal we are doing to deliver, make it of the type
2440 "generated by a user process", and send this synthesized copy. When
2441 used to set the inferior's signal state, this will be required if we
2442 are not currently stopped because of a traced signal, or if we decide
2443 to continue with a different signal.
2445 Note that when continuing the inferior from a stop due to receipt
2446 of a traced signal, we either have set PRCSIG to clear the existing
2447 signal, or we have to call this function to do a PIOCSSIG with either
2448 the existing siginfo struct from pr_info, or one we have synthesized
2449 appropriately for the signal we want to deliver. Otherwise if the
2450 signal is still being traced, the inferior will immediately stop
2453 See siginfo(5) for more details.
2457 set_proc_siginfo (pip
, signo
)
2458 struct procinfo
*pip
;
2461 struct siginfo newsiginfo
;
2462 struct siginfo
*sip
;
2464 if (signo
== pip
-> prstatus
.pr_info
.si_signo
)
2466 sip
= &pip
-> prstatus
.pr_info
;
2470 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
2472 sip
-> si_signo
= signo
;
2474 sip
-> si_errno
= 0;
2475 sip
-> si_pid
= getpid ();
2476 sip
-> si_uid
= getuid ();
2478 if (ioctl (pip
-> fd
, PIOCSSIG
, sip
) < 0)
2480 print_sys_errmsg (pip
-> pathname
, errno
);
2481 warning ("PIOCSSIG failed");
2485 /* Resume execution of process PID. If STEP is nozero, then
2486 just single step it. If SIGNAL is nonzero, restart it with that
2487 signal activated. */
2490 procfs_resume (pid
, step
, signo
)
2496 struct procinfo
*pi
, *procinfo
;
2498 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
2501 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
2504 /* It should not be necessary. If the user explicitly changes the value,
2505 value_assign calls write_register_bytes, which writes it. */
2506 /* It may not be absolutely necessary to specify the PC value for
2507 restarting, but to be safe we use the value that gdb considers
2508 to be current. One case where this might be necessary is if the
2509 user explicitly changes the PC value that gdb considers to be
2510 current. FIXME: Investigate if this is necessary or not. */
2512 #ifdef PRSVADDR_BROKEN
2513 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2514 place to put nPC. In fact, if you use this, nPC seems to be set to some
2515 random garbage. We have to rely on the fact that PC and nPC have been
2516 written previously via PIOCSREG during a register flush. */
2518 pi
->prrun
.pr_vaddr
= (caddr_t
) *(int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
2519 pi
->prrun
.pr_flags
!= PRSVADDR
;
2523 if (signo
== SIGSTOP
&& pi
->nopass_next_sigstop
)
2524 /* When attaching to a child process, if we forced it to stop with
2525 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2526 Upon resuming the first time after such a stop, we explicitly
2527 inhibit sending it another SIGSTOP, which would be the normal
2528 result of default signal handling. One potential drawback to
2529 this is that we will also ignore any attempt to by the user
2530 to explicitly continue after the attach with a SIGSTOP. Ultimately
2531 this problem should be dealt with by making the routines that
2532 deal with the inferior a little smarter, and possibly even allow
2533 an inferior to continue running at the same time as gdb. (FIXME?) */
2535 else if (signo
== SIGTSTP
2536 && pi
->prstatus
.pr_cursig
== SIGTSTP
2537 && pi
->prstatus
.pr_action
.sa_handler
== SIG_DFL
)
2539 /* We are about to pass the inferior a SIGTSTP whose action is
2540 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2541 (notifying the parent via wait()), and then keep going from the
2542 same place when the parent is ready for you to keep going. So
2543 under the debugger, it should do nothing (as if the program had
2544 been stopped and then later resumed. Under ptrace, this
2545 happens for us, but under /proc, the system obligingly stops
2546 the process, and wait_for_inferior would have no way of
2547 distinguishing that type of stop (which indicates that we
2548 should just start it again), with a stop due to the pr_trace
2549 field of the prrun_t struct.
2551 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2552 because the handler needs to get executed. */
2555 signal_to_pass
= signo
;
2559 set_proc_siginfo (pi
, signal_to_pass
);
2563 pi
->prrun
.pr_flags
|= PRCSIG
;
2565 pi
->nopass_next_sigstop
= 0;
2568 pi
->prrun
.pr_flags
|= PRSTEP
;
2570 if (ioctl (pi
->fd
, PIOCRUN
, &pi
->prrun
) != 0)
2572 perror_with_name (pi
->pathname
);
2578 /* Continue all the other threads that haven't had an event of
2582 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
2584 if (pi
!= procinfo
&& !procinfo
->had_event
)
2586 procinfo
->prrun
.pr_flags
&= PRSTEP
;
2587 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
2588 ioctl (procinfo
->fd
, PIOCSTATUS
, &procinfo
->prstatus
);
2589 if (ioctl (procinfo
->fd
, PIOCRUN
, &procinfo
->prrun
) < 0)
2591 if (ioctl (procinfo
->fd
, PIOCSTATUS
, &procinfo
->prstatus
) < 0)
2593 fprintf(stderr
, "PIOCSTATUS failed, errno=%d\n", errno
);
2595 print_sys_errmsg (procinfo
->pathname
, errno
);
2596 error ("PIOCRUN failed");
2598 ioctl (procinfo
->fd
, PIOCSTATUS
, &procinfo
->prstatus
);
2607 procfs_fetch_registers -- fetch current registers from inferior
2611 void procfs_fetch_registers (int regno)
2615 Read the current values of the inferior's registers, both the
2616 general register set and floating point registers (if supported)
2617 and update gdb's idea of their current values.
2622 procfs_fetch_registers (regno
)
2625 struct procinfo
*pi
;
2627 pi
= current_procinfo
;
2629 if (ioctl (pi
->fd
, PIOCGREG
, &pi
->gregset
) != -1)
2631 supply_gregset (&pi
->gregset
);
2633 #if defined (FP0_REGNUM)
2634 if (ioctl (pi
->fd
, PIOCGFPREG
, &pi
->fpregset
) != -1)
2636 supply_fpregset (&pi
->fpregset
);
2645 proc_init_failed - called whenever /proc access initialization
2650 static void proc_init_failed (struct procinfo *pi, char *why)
2654 This function is called whenever initialization of access to a /proc
2655 entry fails. It prints a suitable error message, does some cleanup,
2656 and then invokes the standard error processing routine which dumps
2657 us back into the command loop.
2661 proc_init_failed (pi
, why
)
2662 struct procinfo
*pi
;
2665 print_sys_errmsg (pi
->pathname
, errno
);
2666 kill (pi
->pid
, SIGKILL
);
2667 close_proc_file (pi
);
2676 close_proc_file - close any currently open /proc entry
2680 static void close_proc_file (struct procinfo *pip)
2684 Close any currently open /proc entry and mark the process information
2685 entry as invalid. In order to ensure that we don't try to reuse any
2686 stale information, the pid, fd, and pathnames are explicitly
2687 invalidated, which may be overkill.
2692 close_proc_file (pip
)
2693 struct procinfo
*pip
;
2695 struct procinfo
*procinfo
;
2697 remove_fd (pip
); /* Remove fd from poll/select list */
2701 free (pip
-> pathname
);
2703 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2705 if (procinfo_list
== pip
)
2706 procinfo_list
= pip
->next
;
2708 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
2709 if (procinfo
->next
== pip
)
2710 procinfo
->next
= pip
->next
;
2719 open_proc_file - open a /proc entry for a given process id
2723 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2727 Given a process id and a mode, close the existing open /proc
2728 entry (if any) and open one for the new process id, in the
2729 specified mode. Once it is open, then mark the local process
2730 information structure as valid, which guarantees that the pid,
2731 fd, and pathname fields match an open /proc entry. Returns
2732 zero if the open fails, nonzero otherwise.
2734 Note that the pathname is left intact, even when the open fails,
2735 so that callers can use it to construct meaningful error messages
2736 rather than just "file open failed".
2740 open_proc_file (pid
, pip
, mode
)
2742 struct procinfo
*pip
;
2746 pip
-> had_event
= 0;
2747 pip
-> pathname
= xmalloc (32);
2750 sprintf (pip
-> pathname
, PROC_NAME_FMT
, pid
);
2751 if ((pip
-> fd
= open (pip
-> pathname
, mode
)) < 0)
2758 mappingflags (flags
)
2761 static char asciiflags
[8];
2763 strcpy (asciiflags
, "-------");
2764 #if defined (MA_PHYS)
2765 if (flags
& MA_PHYS
) asciiflags
[0] = 'd';
2767 if (flags
& MA_STACK
) asciiflags
[1] = 's';
2768 if (flags
& MA_BREAK
) asciiflags
[2] = 'b';
2769 if (flags
& MA_SHARED
) asciiflags
[3] = 's';
2770 if (flags
& MA_READ
) asciiflags
[4] = 'r';
2771 if (flags
& MA_WRITE
) asciiflags
[5] = 'w';
2772 if (flags
& MA_EXEC
) asciiflags
[6] = 'x';
2773 return (asciiflags
);
2777 info_proc_flags (pip
, summary
)
2778 struct procinfo
*pip
;
2781 struct trans
*transp
;
2783 printf_filtered ("%-32s", "Process status flags:");
2786 printf_filtered ("\n\n");
2788 for (transp
= pr_flag_table
; transp
-> name
!= NULL
; transp
++)
2790 if (pip
-> prstatus
.pr_flags
& transp
-> value
)
2794 printf_filtered ("%s ", transp
-> name
);
2798 printf_filtered ("\t%-16s %s.\n", transp
-> name
, transp
-> desc
);
2802 printf_filtered ("\n");
2806 info_proc_stop (pip
, summary
)
2807 struct procinfo
*pip
;
2810 struct trans
*transp
;
2814 why
= pip
-> prstatus
.pr_why
;
2815 what
= pip
-> prstatus
.pr_what
;
2817 if (pip
-> prstatus
.pr_flags
& PR_STOPPED
)
2819 printf_filtered ("%-32s", "Reason for stopping:");
2822 printf_filtered ("\n\n");
2824 for (transp
= pr_why_table
; transp
-> name
!= NULL
; transp
++)
2826 if (why
== transp
-> value
)
2830 printf_filtered ("%s ", transp
-> name
);
2834 printf_filtered ("\t%-16s %s.\n",
2835 transp
-> name
, transp
-> desc
);
2841 /* Use the pr_why field to determine what the pr_what field means, and
2842 print more information. */
2847 /* pr_what is unused for this case */
2853 printf_filtered ("%s ", signalname (what
));
2857 printf_filtered ("\t%-16s %s.\n", signalname (what
),
2858 safe_strsignal (what
));
2864 printf_filtered ("%s ", syscallname (what
));
2868 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
2869 "Entered this system call");
2875 printf_filtered ("%s ", syscallname (what
));
2879 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
2880 "Returned from this system call");
2886 printf_filtered ("%s ",
2887 lookupname (faults_table
, what
, "fault"));
2891 printf_filtered ("\t%-16s %s.\n",
2892 lookupname (faults_table
, what
, "fault"),
2893 lookupdesc (faults_table
, what
));
2897 printf_filtered ("\n");
2902 info_proc_siginfo (pip
, summary
)
2903 struct procinfo
*pip
;
2906 struct siginfo
*sip
;
2908 if ((pip
-> prstatus
.pr_flags
& PR_STOPPED
) &&
2909 (pip
-> prstatus
.pr_why
== PR_SIGNALLED
||
2910 pip
-> prstatus
.pr_why
== PR_FAULTED
))
2912 printf_filtered ("%-32s", "Additional signal/fault info:");
2913 sip
= &pip
-> prstatus
.pr_info
;
2916 printf_filtered ("%s ", signalname (sip
-> si_signo
));
2917 if (sip
-> si_errno
> 0)
2919 printf_filtered ("%s ", errnoname (sip
-> si_errno
));
2921 if (sip
-> si_code
<= 0)
2923 printf_filtered ("sent by %s, uid %d ",
2924 target_pid_to_str (sip
-> si_pid
),
2929 printf_filtered ("%s ", sigcodename (sip
));
2930 if ((sip
-> si_signo
== SIGILL
) ||
2931 (sip
-> si_signo
== SIGFPE
) ||
2932 (sip
-> si_signo
== SIGSEGV
) ||
2933 (sip
-> si_signo
== SIGBUS
))
2935 printf_filtered ("addr=%#x ", sip
-> si_addr
);
2937 else if ((sip
-> si_signo
== SIGCHLD
))
2939 printf_filtered ("child %s, status %u ",
2940 target_pid_to_str (sip
-> si_pid
),
2943 else if ((sip
-> si_signo
== SIGPOLL
))
2945 printf_filtered ("band %u ", sip
-> si_band
);
2951 printf_filtered ("\n\n");
2952 printf_filtered ("\t%-16s %s.\n", signalname (sip
-> si_signo
),
2953 safe_strsignal (sip
-> si_signo
));
2954 if (sip
-> si_errno
> 0)
2956 printf_filtered ("\t%-16s %s.\n",
2957 errnoname (sip
-> si_errno
),
2958 safe_strerror (sip
-> si_errno
));
2960 if (sip
-> si_code
<= 0)
2962 printf_filtered ("\t%-16u %s\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
2963 "PID of process sending signal");
2964 printf_filtered ("\t%-16u %s\n", sip
-> si_uid
,
2965 "UID of process sending signal");
2969 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
2971 if ((sip
-> si_signo
== SIGILL
) ||
2972 (sip
-> si_signo
== SIGFPE
))
2974 printf_filtered ("\t%-16#x %s.\n", sip
-> si_addr
,
2975 "Address of faulting instruction");
2977 else if ((sip
-> si_signo
== SIGSEGV
) ||
2978 (sip
-> si_signo
== SIGBUS
))
2980 printf_filtered ("\t%-16#x %s.\n", sip
-> si_addr
,
2981 "Address of faulting memory reference");
2983 else if ((sip
-> si_signo
== SIGCHLD
))
2985 printf_filtered ("\t%-16u %s.\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
2986 "Child process ID");
2987 printf_filtered ("\t%-16u %s.\n", sip
-> si_status
,
2988 "Child process exit value or signal");
2990 else if ((sip
-> si_signo
== SIGPOLL
))
2992 printf_filtered ("\t%-16u %s.\n", sip
-> si_band
,
2993 "Band event for POLL_{IN,OUT,MSG}");
2997 printf_filtered ("\n");
3002 info_proc_syscalls (pip
, summary
)
3003 struct procinfo
*pip
;
3011 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
3012 if (pip
-> prstatus
.pr_flags
& PR_ASLEEP
)
3014 int syscallnum
= pip
-> prstatus
.pr_reg
[R_D0
];
3017 printf_filtered ("%-32s", "Sleeping in system call:");
3018 printf_filtered ("%s", syscallname (syscallnum
));
3022 printf_filtered ("Sleeping in system call '%s'.\n",
3023 syscallname (syscallnum
));
3028 if (ioctl (pip
-> fd
, PIOCGENTRY
, &pip
-> entryset
) < 0)
3030 print_sys_errmsg (pip
-> pathname
, errno
);
3031 error ("PIOCGENTRY failed");
3034 if (ioctl (pip
-> fd
, PIOCGEXIT
, &pip
-> exitset
) < 0)
3036 print_sys_errmsg (pip
-> pathname
, errno
);
3037 error ("PIOCGEXIT failed");
3040 printf_filtered ("System call tracing information:\n\n");
3042 printf_filtered ("\t%-12s %-8s %-8s\n",
3046 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
3049 if (syscall_table
[syscallnum
] != NULL
)
3051 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
3052 printf_filtered ("%-8s ",
3053 prismember (&pip
-> entryset
, syscallnum
)
3055 printf_filtered ("%-8s ",
3056 prismember (&pip
-> exitset
, syscallnum
)
3058 printf_filtered ("\n");
3061 printf_filtered ("\n");
3070 static char locbuf
[32];
3072 name
= strsigno (signo
);
3075 sprintf (locbuf
, "Signal %d", signo
);
3079 sprintf (locbuf
, "%s (%d)", name
, signo
);
3089 static char locbuf
[32];
3091 name
= strerrno (errnum
);
3094 sprintf (locbuf
, "Errno %d", errnum
);
3098 sprintf (locbuf
, "%s (%d)", name
, errnum
);
3104 info_proc_signals (pip
, summary
)
3105 struct procinfo
*pip
;
3112 if (ioctl (pip
-> fd
, PIOCGTRACE
, &pip
-> trace
) < 0)
3114 print_sys_errmsg (pip
-> pathname
, errno
);
3115 error ("PIOCGTRACE failed");
3118 printf_filtered ("Disposition of signals:\n\n");
3119 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3120 "Signal", "Trace", "Hold", "Pending", "Description");
3121 for (signo
= 0; signo
< NSIG
; signo
++)
3124 printf_filtered ("\t%-15s ", signalname (signo
));
3125 printf_filtered ("%-8s ",
3126 prismember (&pip
-> trace
, signo
)
3128 printf_filtered ("%-8s ",
3129 prismember (&pip
-> prstatus
.pr_sighold
, signo
)
3131 printf_filtered ("%-8s ",
3132 prismember (&pip
-> prstatus
.pr_sigpend
, signo
)
3134 printf_filtered (" %s\n", safe_strsignal (signo
));
3136 printf_filtered ("\n");
3141 info_proc_faults (pip
, summary
)
3142 struct procinfo
*pip
;
3145 struct trans
*transp
;
3149 if (ioctl (pip
-> fd
, PIOCGFAULT
, &pip
-> fltset
) < 0)
3151 print_sys_errmsg (pip
-> pathname
, errno
);
3152 error ("PIOCGFAULT failed");
3155 printf_filtered ("Current traced hardware fault set:\n\n");
3156 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3158 for (transp
= faults_table
; transp
-> name
!= NULL
; transp
++)
3161 printf_filtered ("\t%-12s ", transp
-> name
);
3162 printf_filtered ("%-8s", prismember (&pip
-> fltset
, transp
-> value
)
3164 printf_filtered ("\n");
3166 printf_filtered ("\n");
3171 info_proc_mappings (pip
, summary
)
3172 struct procinfo
*pip
;
3176 struct prmap
*prmaps
;
3177 struct prmap
*prmap
;
3181 printf_filtered ("Mapped address spaces:\n\n");
3182 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3188 if (ioctl (pip
-> fd
, PIOCNMAP
, &nmap
) == 0)
3190 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
3191 if (ioctl (pip
-> fd
, PIOCMAP
, prmaps
) == 0)
3193 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
3195 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
3197 prmap
-> pr_vaddr
+ prmap
-> pr_size
- 1,
3200 mappingflags (prmap
-> pr_mflags
));
3204 printf_filtered ("\n");
3212 info_proc -- implement the "info proc" command
3216 void info_proc (char *args, int from_tty)
3220 Implement gdb's "info proc" command by using the /proc interface
3221 to print status information about any currently running process.
3223 Examples of the use of "info proc" are:
3225 info proc (prints summary info for current inferior)
3226 info proc 123 (prints summary info for process with pid 123)
3227 info proc mappings (prints address mappings)
3228 info proc times (prints process/children times)
3229 info proc id (prints pid, ppid, gid, sid, etc)
3230 FIXME: i proc id not implemented.
3231 info proc status (prints general process state info)
3232 FIXME: i proc status not implemented.
3233 info proc signals (prints info about signal handling)
3234 info proc all (prints all info)
3239 info_proc (args
, from_tty
)
3244 struct procinfo
*pip
;
3245 struct cleanup
*old_chain
;
3259 old_chain
= make_cleanup (null_cleanup
, 0);
3261 /* Default to using the current inferior if no pid specified. Note
3262 that inferior_pid may be 0, hence we set okerr. */
3264 pip
= find_procinfo (inferior_pid
, 1);
3268 if ((argv
= buildargv (args
)) == NULL
)
3272 make_cleanup (freeargv
, (char *) argv
);
3274 while (*argv
!= NULL
)
3276 argsize
= strlen (*argv
);
3277 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
3282 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
3287 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
3292 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
3297 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
3302 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
3307 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
3312 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
3317 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
3322 else if ((pid
= atoi (*argv
)) > 0)
3324 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
3325 memset (pip
, 0, sizeof (*pip
));
3328 if (!open_proc_file (pid
, pip
, O_RDONLY
))
3330 perror_with_name (pip
-> pathname
);
3333 make_cleanup (close_proc_file
, pip
);
3335 else if (**argv
!= '\000')
3337 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
3343 /* If we don't have a valid open process at this point, then we have no
3344 inferior or didn't specify a specific pid. */
3349 No process. Start debugging a program or specify an explicit process ID.");
3351 if (ioctl (pip
-> fd
, PIOCSTATUS
, &(pip
-> prstatus
)) < 0)
3353 print_sys_errmsg (pip
-> pathname
, errno
);
3354 error ("PIOCSTATUS failed");
3357 /* Print verbose information of the requested type(s), or just a summary
3358 of the information for all types. */
3360 printf_filtered ("\nInformation for %s:\n\n", pip
-> pathname
);
3361 if (summary
|| all
|| flags
)
3363 info_proc_flags (pip
, summary
);
3367 info_proc_stop (pip
, summary
);
3369 if (summary
|| all
|| signals
|| faults
)
3371 info_proc_siginfo (pip
, summary
);
3373 if (summary
|| all
|| syscalls
)
3375 info_proc_syscalls (pip
, summary
);
3377 if (summary
|| all
|| mappings
)
3379 info_proc_mappings (pip
, summary
);
3381 if (summary
|| all
|| signals
)
3383 info_proc_signals (pip
, summary
);
3385 if (summary
|| all
|| faults
)
3387 info_proc_faults (pip
, summary
);
3389 printf_filtered ("\n");
3391 /* All done, deal with closing any temporary process info structure,
3392 freeing temporary memory , etc. */
3394 do_cleanups (old_chain
);
3401 procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
3405 void procfs_set_sproc_trap (void)
3409 This function sets up a trap on sproc system call exits so that we can
3410 detect the arrival of a new thread. We are called with the child
3411 stopped prior to it's first instruction.
3413 Also note that we turn on the inherit-on-fork flag in the child process
3414 so that any grand-children start with all tracing flags set.
3420 procfs_set_sproc_trap (pi
)
3421 struct procinfo
*pi
;
3425 if (ioctl (pi
->fd
, PIOCGEXIT
, &exitset
) < 0)
3427 print_sys_errmsg (pi
->pathname
, errno
);
3428 error ("PIOCGEXIT failed");
3431 praddset (&exitset
, SYS_sproc
);
3433 if (ioctl (pi
->fd
, PIOCSEXIT
, &exitset
) < 0)
3435 print_sys_errmsg (pi
->pathname
, errno
);
3436 error ("PIOCSEXIT failed");
3439 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3440 tracing flags set. */
3442 #ifdef PIOCSET /* New method */
3446 ioctl (pi
->fd
, PIOCSET
, &pr_flags
);
3449 #ifdef PIOCSFORK /* Original method */
3450 ioctl (pi
->fd
, PIOCSFORK
, NULL
);
3454 #endif /* SYS_sproc */
3456 /* Fork an inferior process, and start debugging it with /proc. */
3459 procfs_create_inferior (exec_file
, allargs
, env
)
3464 fork_inferior (exec_file
, allargs
, env
,
3465 proc_set_exec_trap
, procfs_init_inferior
);
3466 /* We are at the first instruction we care about. */
3467 /* Pedal to the metal... */
3469 /* Setup traps on exit from sproc() */
3472 procfs_set_sproc_trap (current_procinfo
);
3475 proceed ((CORE_ADDR
) -1, 0, 0);
3478 /* Clean up after the inferior dies. */
3481 procfs_mourn_inferior ()
3483 struct procinfo
*pi
;
3485 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3486 unconditionally_kill_inferior (pi
);
3488 unpush_target (&procfs_ops
);
3489 generic_mourn_inferior ();
3492 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3499 struct target_ops procfs_ops
= {
3500 "procfs", /* to_shortname */
3501 "Unix /proc child process", /* to_longname */
3502 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3503 procfs_open
, /* to_open */
3505 procfs_attach
, /* to_attach */
3506 procfs_detach
, /* to_detach */
3507 procfs_resume
, /* to_resume */
3508 procfs_wait
, /* to_wait */
3509 procfs_fetch_registers
, /* to_fetch_registers */
3510 procfs_store_registers
, /* to_store_registers */
3511 procfs_prepare_to_store
, /* to_prepare_to_store */
3512 procfs_xfer_memory
, /* to_xfer_memory */
3513 procfs_files_info
, /* to_files_info */
3514 memory_insert_breakpoint
, /* to_insert_breakpoint */
3515 memory_remove_breakpoint
, /* to_remove_breakpoint */
3516 terminal_init_inferior
, /* to_terminal_init */
3517 terminal_inferior
, /* to_terminal_inferior */
3518 terminal_ours_for_output
, /* to_terminal_ours_for_output */
3519 terminal_ours
, /* to_terminal_ours */
3520 child_terminal_info
, /* to_terminal_info */
3521 procfs_kill_inferior
, /* to_kill */
3523 0, /* to_lookup_symbol */
3524 procfs_create_inferior
, /* to_create_inferior */
3525 procfs_mourn_inferior
, /* to_mourn_inferior */
3526 procfs_can_run
, /* to_can_run */
3527 procfs_notice_signals
, /* to_notice_signals */
3528 process_stratum
, /* to_stratum */
3530 1, /* to_has_all_memory */
3531 1, /* to_has_memory */
3532 1, /* to_has_stack */
3533 1, /* to_has_registers */
3534 1, /* to_has_execution */
3536 0, /* sections_end */
3537 OPS_MAGIC
/* to_magic */
3544 _initialize_procfs -- initialize the process file system stuff
3548 void _initialize_procfs (void)
3552 Do required initializations during gdb startup for using the
3553 /proc file system interface.
3558 _initialize_procfs ()
3560 add_target (&procfs_ops
);
3562 add_info ("proc", info_proc
,
3563 "Show process status information using /proc entry.\n\
3564 Specify process id or use current inferior by default.\n\
3565 Specify keywords for detailed information; default is summary.\n\
3566 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3567 `status', `syscalls', and `times'.\n\
3568 Unambiguous abbreviations may be used.");
3570 init_syscall_table ();