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 */
1527 /* One trap to exec the shell, one to exec the program being debugged. */
1528 startup_inferior (2);
1535 procfs_notice_signals
1539 static void procfs_notice_signals (int pid);
1543 When the user changes the state of gdb's signal handling via the
1544 "handle" command, this function gets called to see if any change
1545 in the /proc interface is required. It is also called internally
1546 by other /proc interface functions to initialize the state of
1547 the traced signal set.
1549 One thing it does is that signals for which the state is "nostop",
1550 "noprint", and "pass", have their trace bits reset in the pr_trace
1551 field, so that they are no longer traced. This allows them to be
1552 delivered directly to the inferior without the debugger ever being
1557 procfs_notice_signals (pid
)
1561 struct procinfo
*pi
;
1563 pi
= find_procinfo (pid
, 0);
1565 for (signo
= 0; signo
< NSIG
; signo
++)
1567 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
1568 signal_print_state (target_signal_from_host (signo
)) == 0 &&
1569 signal_pass_state (target_signal_from_host (signo
)) == 1)
1571 prdelset (&pi
->prrun
.pr_trace
, signo
);
1575 praddset (&pi
->prrun
.pr_trace
, signo
);
1578 if (ioctl (pi
->fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
1580 print_sys_errmsg ("PIOCSTRACE failed", errno
);
1588 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1592 void proc_set_exec_trap (void)
1596 This function is called in the child process when starting up
1597 an inferior, prior to doing the exec of the actual inferior.
1598 It sets the child process's exitset to make exit from the exec
1599 system call an event of interest to stop on, and then simply
1600 returns. The child does the exec, the system call returns, and
1601 the child stops at the first instruction, ready for the gdb
1602 parent process to take control of it.
1606 We need to use all local variables since the child may be sharing
1607 it's data space with the parent, if vfork was used rather than
1610 Also note that we want to turn off the inherit-on-fork flag in
1611 the child process so that any grand-children start with all
1612 tracing flags cleared.
1616 proc_set_exec_trap ()
1620 auto char procname
[32];
1623 sprintf (procname
, PROC_NAME_FMT
, getpid ());
1624 if ((fd
= open (procname
, O_RDWR
)) < 0)
1627 gdb_flush (gdb_stderr
);
1630 premptyset (&exitset
);
1631 premptyset (&entryset
);
1634 Not all systems with /proc have all the exec* syscalls with the same
1635 names. On the SGI, for example, there is no SYS_exec, but there
1636 *is* a SYS_execv. So, we try to account for that. */
1639 praddset (&exitset
, SYS_exec
);
1642 praddset (&exitset
, SYS_execve
);
1645 praddset (&exitset
, SYS_execv
);
1648 if (ioctl (fd
, PIOCSEXIT
, &exitset
) < 0)
1651 gdb_flush (gdb_stderr
);
1655 praddset (&entryset
, SYS_exit
);
1657 if (ioctl (fd
, PIOCSENTRY
, &entryset
) < 0)
1660 gdb_flush (gdb_stderr
);
1664 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1665 start with tracing flags cleared. */
1667 #if defined (PIOCRESET) /* New method */
1671 ioctl (fd
, PIOCRESET
, &pr_flags
);
1674 #if defined (PIOCRFORK) /* Original method */
1675 ioctl (fd
, PIOCRFORK
, NULL
);
1679 /* Turn on run-on-last-close flag so that this process will not hang
1680 if GDB goes away for some reason. */
1682 #if defined (PIOCSET) /* New method */
1686 (void) ioctl (fd
, PIOCSET
, &pr_flags
);
1689 #if defined (PIOCSRLC) /* Original method */
1690 (void) ioctl (fd
, PIOCSRLC
, 0);
1699 proc_iterate_over_mappings -- call function for every mapped space
1703 int proc_iterate_over_mappings (int (*func)())
1707 Given a pointer to a function, call that function for every
1708 mapped address space, passing it an open file descriptor for
1709 the file corresponding to that mapped address space (if any)
1710 and the base address of the mapped space. Quit when we hit
1711 the end of the mappings or the function returns nonzero.
1715 proc_iterate_over_mappings (func
)
1716 int (*func
) PARAMS ((int, CORE_ADDR
));
1721 struct prmap
*prmaps
;
1722 struct prmap
*prmap
;
1723 struct procinfo
*pi
;
1725 pi
= current_procinfo
;
1727 if (ioctl (pi
->fd
, PIOCNMAP
, &nmap
) == 0)
1729 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
1730 if (ioctl (pi
->fd
, PIOCMAP
, prmaps
) == 0)
1732 for (prmap
= prmaps
; prmap
-> pr_size
&& funcstat
== 0; ++prmap
)
1734 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
-> pr_vaddr
, 0);
1735 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
-> pr_vaddr
);
1743 #if 0 /* Currently unused */
1748 proc_base_address -- find base address for segment containing address
1752 CORE_ADDR proc_base_address (CORE_ADDR addr)
1756 Given an address of a location in the inferior, find and return
1757 the base address of the mapped segment containing that address.
1759 This is used for example, by the shared library support code,
1760 where we have the pc value for some location in the shared library
1761 where we are stopped, and need to know the base address of the
1762 segment containing that address.
1766 proc_base_address (addr
)
1770 struct prmap
*prmaps
;
1771 struct prmap
*prmap
;
1772 CORE_ADDR baseaddr
= 0;
1773 struct procinfo
*pi
;
1775 pi
= current_procinfo
;
1777 if (ioctl (pi
->fd
, PIOCNMAP
, &nmap
) == 0)
1779 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
1780 if (ioctl (pi
->fd
, PIOCMAP
, prmaps
) == 0)
1782 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
1784 if ((prmap
-> pr_vaddr
<= (caddr_t
) addr
) &&
1785 (prmap
-> pr_vaddr
+ prmap
-> pr_size
> (caddr_t
) addr
))
1787 baseaddr
= (CORE_ADDR
) prmap
-> pr_vaddr
;
1802 proc_address_to_fd -- return open fd for file mapped to address
1806 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1810 Given an address in the current inferior's address space, use the
1811 /proc interface to find an open file descriptor for the file that
1812 this address was mapped in from. Return -1 if there is no current
1813 inferior. Print a warning message if there is an inferior but
1814 the address corresponds to no file (IE a bogus address).
1819 proc_address_to_fd (pi
, addr
, complain
)
1820 struct procinfo
*pi
;
1826 if ((fd
= ioctl (pi
->fd
, PIOCOPENM
, (caddr_t
*) &addr
)) < 0)
1830 print_sys_errmsg (pi
->pathname
, errno
);
1831 warning ("can't find mapped file for address 0x%x", addr
);
1838 /* Attach to process PID, then initialize for debugging it
1839 and wait for the trace-trap that results from attaching. */
1842 procfs_attach (args
, from_tty
)
1850 error_no_arg ("process-id to attach");
1854 if (pid
== getpid()) /* Trying to masturbate? */
1855 error ("I refuse to debug myself!");
1859 exec_file
= (char *) get_exec_file (0);
1862 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
1864 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid
));
1866 gdb_flush (gdb_stdout
);
1871 push_target (&procfs_ops
);
1875 /* Take a program previously attached to and detaches it.
1876 The program resumes execution and will no longer stop
1877 on signals, etc. We'd better not have left any breakpoints
1878 in the program or it'll die when it hits one. For this
1879 to work, it may be necessary for the process to have been
1880 previously attached. It *might* work if the program was
1881 started via the normal ptrace (PTRACE_TRACEME). */
1884 procfs_detach (args
, from_tty
)
1892 char *exec_file
= get_exec_file (0);
1895 printf_unfiltered ("Detaching from program: %s %s\n",
1896 exec_file
, target_pid_to_str (inferior_pid
));
1897 gdb_flush (gdb_stdout
);
1900 siggnal
= atoi (args
);
1902 do_detach (siggnal
);
1904 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
1907 /* Get ready to modify the registers array. On machines which store
1908 individual registers, this doesn't need to do anything. On machines
1909 which store all the registers in one fell swoop, this makes sure
1910 that registers contains all the registers from the program being
1914 procfs_prepare_to_store ()
1916 #ifdef CHILD_PREPARE_TO_STORE
1917 CHILD_PREPARE_TO_STORE ();
1921 /* Print status information about what we're accessing. */
1924 procfs_files_info (ignore
)
1925 struct target_ops
*ignore
;
1927 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
1928 attach_flag
? "attached": "child", target_pid_to_str (inferior_pid
));
1933 procfs_open (arg
, from_tty
)
1937 error ("Use the \"run\" command to start a Unix child process.");
1944 do_attach -- attach to an already existing process
1948 int do_attach (int pid)
1952 Attach to an already existing process with the specified process
1953 id. If the process is not already stopped, query whether to
1958 The option of stopping at attach time is specific to the /proc
1959 versions of gdb. Versions using ptrace force the attachee
1960 to stop. (I have changed this version to do so, too. All you
1961 have to do is "continue" to make it go on. -- gnu@cygnus.com)
1970 struct procinfo
*pi
;
1972 pi
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
1974 if (!open_proc_file (pid
, pi
, O_RDWR
))
1977 perror_with_name (pi
->pathname
);
1981 /* Add new process to process info list */
1983 pi
->next
= procinfo_list
;
1986 add_fd (pi
); /* Add to list for poll/select */
1988 /* Get current status of process and if it is not already stopped,
1989 then stop it. Remember whether or not it was stopped when we first
1992 if (ioctl (pi
->fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
1994 print_sys_errmsg (pi
->pathname
, errno
);
1995 close_proc_file (pi
);
1996 error ("PIOCSTATUS failed");
1998 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
2000 pi
->was_stopped
= 1;
2004 pi
->was_stopped
= 0;
2005 if (1 || query ("Process is currently running, stop it? "))
2007 /* Make it run again when we close it. */
2008 #if defined (PIOCSET) /* New method */
2012 result
= ioctl (pi
->fd
, PIOCSET
, &pr_flags
);
2015 #if defined (PIOCSRLC) /* Original method */
2016 result
= ioctl (pi
->fd
, PIOCSRLC
, 0);
2021 print_sys_errmsg (pi
->pathname
, errno
);
2022 close_proc_file (pi
);
2023 error ("PIOCSRLC or PIOCSET failed");
2025 if (ioctl (pi
->fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
2027 print_sys_errmsg (pi
->pathname
, errno
);
2028 close_proc_file (pi
);
2029 error ("PIOCSTOP failed");
2031 pi
->nopass_next_sigstop
= 1;
2035 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid
));
2039 /* Remember some things about the inferior that we will, or might, change
2040 so that we can restore them when we detach. */
2042 ioctl (pi
->fd
, PIOCGTRACE
, &pi
->saved_trace
);
2043 ioctl (pi
->fd
, PIOCGHOLD
, &pi
->saved_sighold
);
2044 ioctl (pi
->fd
, PIOCGFAULT
, &pi
->saved_fltset
);
2045 ioctl (pi
->fd
, PIOCGENTRY
, &pi
->saved_entryset
);
2046 ioctl (pi
->fd
, PIOCGEXIT
, &pi
->saved_exitset
);
2048 /* Set up trace and fault sets, as gdb expects them. */
2050 memset (&pi
->prrun
, 0, sizeof (pi
->prrun
));
2051 prfillset (&pi
->prrun
.pr_trace
);
2052 procfs_notice_signals (pid
);
2053 prfillset (&pi
->prrun
.pr_fault
);
2054 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
2055 if (ioctl (pi
->fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
2057 print_sys_errmsg ("PIOCSFAULT failed", errno
);
2059 if (ioctl (pi
->fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
2061 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2071 do_detach -- detach from an attached-to process
2075 void do_detach (int signal)
2079 Detach from the current attachee.
2081 If signal is non-zero, the attachee is started running again and sent
2082 the specified signal.
2084 If signal is zero and the attachee was not already stopped when we
2085 attached to it, then we make it runnable again when we detach.
2087 Otherwise, we query whether or not to make the attachee runnable
2088 again, since we may simply want to leave it in the state it was in
2091 We report any problems, but do not consider them errors, since we
2092 MUST detach even if some things don't seem to go right. This may not
2093 be the ideal situation. (FIXME).
2101 struct procinfo
*pi
;
2103 pi
= current_procinfo
;
2107 set_proc_siginfo (pi
, signal
);
2109 if (ioctl (pi
->fd
, PIOCSEXIT
, &pi
->saved_exitset
) < 0)
2111 print_sys_errmsg (pi
->pathname
, errno
);
2112 printf_unfiltered ("PIOCSEXIT failed.\n");
2114 if (ioctl (pi
->fd
, PIOCSENTRY
, &pi
->saved_entryset
) < 0)
2116 print_sys_errmsg (pi
->pathname
, errno
);
2117 printf_unfiltered ("PIOCSENTRY failed.\n");
2119 if (ioctl (pi
->fd
, PIOCSTRACE
, &pi
->saved_trace
) < 0)
2121 print_sys_errmsg (pi
->pathname
, errno
);
2122 printf_unfiltered ("PIOCSTRACE failed.\n");
2124 if (ioctl (pi
->fd
, PIOCSHOLD
, &pi
->saved_sighold
) < 0)
2126 print_sys_errmsg (pi
->pathname
, errno
);
2127 printf_unfiltered ("PIOSCHOLD failed.\n");
2129 if (ioctl (pi
->fd
, PIOCSFAULT
, &pi
->saved_fltset
) < 0)
2131 print_sys_errmsg (pi
->pathname
, errno
);
2132 printf_unfiltered ("PIOCSFAULT failed.\n");
2134 if (ioctl (pi
->fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
2136 print_sys_errmsg (pi
->pathname
, errno
);
2137 printf_unfiltered ("PIOCSTATUS failed.\n");
2141 if (signal
|| (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
2143 if (signal
|| !pi
->was_stopped
||
2144 query ("Was stopped when attached, make it runnable again? "))
2146 /* Clear any fault that might have stopped it. */
2147 if (ioctl (pi
->fd
, PIOCCFAULT
, 0))
2149 print_sys_errmsg (pi
->pathname
, errno
);
2150 printf_unfiltered ("PIOCCFAULT failed.\n");
2153 /* Make it run again when we close it. */
2154 #if defined (PIOCSET) /* New method */
2158 result
= ioctl (pi
->fd
, PIOCSET
, &pr_flags
);
2161 #if defined (PIOCSRLC) /* Original method */
2162 result
= ioctl (pi
->fd
, PIOCSRLC
, 0);
2167 print_sys_errmsg (pi
->pathname
, errno
);
2168 printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
2173 close_proc_file (pi
);
2177 /* emulate wait() as much as possible.
2178 Wait for child to do something. Return pid of child, or -1 in case
2179 of error; store status in *OURSTATUS.
2181 Not sure why we can't
2182 just use wait(), but it seems to have problems when applied to a
2183 process being controlled with the /proc interface.
2185 We have a race problem here with no obvious solution. We need to let
2186 the inferior run until it stops on an event of interest, which means
2187 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2188 ioctl if the process is already stopped on something that is not an
2189 event of interest, or the call will hang indefinitely. Thus we first
2190 use PIOCSTATUS to see if the process is not stopped. If not, then we
2191 use PIOCWSTOP. But during the window between the two, if the process
2192 stops for any reason that is not an event of interest (such as a job
2193 control signal) then gdb will hang. One possible workaround is to set
2194 an alarm to wake up every minute of so and check to see if the process
2195 is still running, and if so, then reissue the PIOCWSTOP. But this is
2196 a real kludge, so has not been implemented. FIXME: investigate
2199 FIXME: Investigate why wait() seems to have problems with programs
2200 being control by /proc routines. */
2203 procfs_wait (pid
, ourstatus
)
2205 struct target_waitstatus
*ourstatus
;
2212 struct procinfo
*pi
;
2214 if (pid
!= -1) /* Non-specific process? */
2217 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
2227 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
2228 if (pi
->pid
== pid
&& pi
->had_event
)
2231 if (!pi
&& !checkerr
)
2234 if (!checkerr
&& !(pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
2236 if (ioctl (pi
->fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
2243 if (errno
== ENOENT
)
2245 rtnval
= wait (&statval
);
2246 if (rtnval
!= inferior_pid
)
2248 print_sys_errmsg (pi
->pathname
, errno
);
2249 error ("PIOCWSTOP, wait failed, returned %d", rtnval
);
2255 print_sys_errmsg (pi
->pathname
, errno
);
2256 error ("PIOCSTATUS or PIOCWSTOP failed.");
2260 else if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
2262 rtnval
= pi
->prstatus
.pr_pid
;
2263 why
= pi
->prstatus
.pr_why
;
2264 what
= pi
->prstatus
.pr_what
;
2269 statval
= (what
<< 8) | 0177;
2272 if (what
!= SYS_exit
)
2273 error ("PR_SYSENTRY, unknown system call %d", what
);
2275 pi
->prrun
.pr_flags
= PRCFAULT
;
2277 if (ioctl (pi
->fd
, PIOCRUN
, &pi
->prrun
) != 0)
2278 perror_with_name (pi
->pathname
);
2280 rtnval
= wait (&statval
);
2295 statval
= (SIGTRAP
<< 8) | 0177;
2299 /* We've just detected the completion of an sproc system call. Now we need to
2300 setup a procinfo struct for this thread, and notify the thread system of the
2303 /* If sproc failed, then nothing interesting happened. Continue the process and
2304 go back to sleep. */
2306 if (pi
->prstatus
.pr_errno
!= 0)
2308 pi
->prrun
.pr_flags
&= PRSTEP
;
2309 pi
->prrun
.pr_flags
|= PRCFAULT
;
2311 if (ioctl (pi
->fd
, PIOCRUN
, &pi
->prrun
) != 0)
2312 perror_with_name (pi
->pathname
);
2317 /* At this point, the new thread is stopped at it's first instruction, and
2318 the parent is stopped at the exit from sproc. */
2320 /* Notify the caller of the arrival of a new thread. */
2321 create_procinfo (pi
->prstatus
.pr_rval1
);
2323 rtnval
= pi
->prstatus
.pr_rval1
;
2324 statval
= (SIGTRAP
<< 8) | 0177;
2327 #endif /* SYS_sproc */
2330 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what
);
2334 statval
= (SIGSTOP
<< 8) | 0177;
2337 statval
= (what
<< 8) | 0177;
2344 statval
= (SIGILL
<< 8) | 0177;
2348 statval
= (SIGTRAP
<< 8) | 0177;
2353 statval
= (SIGSEGV
<< 8) | 0177;
2358 statval
= (SIGFPE
<< 8) | 0177;
2360 case FLTPAGE
: /* Recoverable page fault */
2362 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
2366 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
2368 /* Stop all the other threads when any of them stops. */
2371 struct procinfo
*procinfo
;
2373 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
2375 if (!procinfo
->had_event
)
2376 if (ioctl (procinfo
->fd
, PIOCSTOP
, &procinfo
->prstatus
) < 0)
2378 print_sys_errmsg (procinfo
->pathname
, errno
);
2379 error ("PIOCSTOP failed");
2386 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2387 pi
->prstatus
.pr_flags
);
2390 store_waitstatus (ourstatus
, statval
);
2392 if (rtnval
== -1) /* No more children to wait for */
2394 fprintf_unfiltered (gdb_stderr
, "Child process unexpectedly missing.\n");
2395 /* Claim it exited with unknown signal. */
2396 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
2397 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
2401 pi
->had_event
= 0; /* Indicate that we've seen this one */
2409 set_proc_siginfo - set a process's current signal info
2413 void set_proc_siginfo (struct procinfo *pip, int signo);
2417 Given a pointer to a process info struct in PIP and a signal number
2418 in SIGNO, set the process's current signal and its associated signal
2419 information. The signal will be delivered to the process immediately
2420 after execution is resumed, even if it is being held. In addition,
2421 this particular delivery will not cause another PR_SIGNALLED stop
2422 even if the signal is being traced.
2424 If we are not delivering the same signal that the prstatus siginfo
2425 struct contains information about, then synthesize a siginfo struct
2426 to match the signal we are doing to deliver, make it of the type
2427 "generated by a user process", and send this synthesized copy. When
2428 used to set the inferior's signal state, this will be required if we
2429 are not currently stopped because of a traced signal, or if we decide
2430 to continue with a different signal.
2432 Note that when continuing the inferior from a stop due to receipt
2433 of a traced signal, we either have set PRCSIG to clear the existing
2434 signal, or we have to call this function to do a PIOCSSIG with either
2435 the existing siginfo struct from pr_info, or one we have synthesized
2436 appropriately for the signal we want to deliver. Otherwise if the
2437 signal is still being traced, the inferior will immediately stop
2440 See siginfo(5) for more details.
2444 set_proc_siginfo (pip
, signo
)
2445 struct procinfo
*pip
;
2448 struct siginfo newsiginfo
;
2449 struct siginfo
*sip
;
2451 if (signo
== pip
-> prstatus
.pr_info
.si_signo
)
2453 sip
= &pip
-> prstatus
.pr_info
;
2457 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
2459 sip
-> si_signo
= signo
;
2461 sip
-> si_errno
= 0;
2462 sip
-> si_pid
= getpid ();
2463 sip
-> si_uid
= getuid ();
2465 if (ioctl (pip
-> fd
, PIOCSSIG
, sip
) < 0)
2467 print_sys_errmsg (pip
-> pathname
, errno
);
2468 warning ("PIOCSSIG failed");
2472 /* Resume execution of process PID. If STEP is nozero, then
2473 just single step it. If SIGNAL is nonzero, restart it with that
2474 signal activated. */
2477 procfs_resume (pid
, step
, signo
)
2480 enum target_signal signo
;
2483 struct procinfo
*pi
, *procinfo
;
2485 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
2488 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
2491 /* It should not be necessary. If the user explicitly changes the value,
2492 value_assign calls write_register_bytes, which writes it. */
2493 /* It may not be absolutely necessary to specify the PC value for
2494 restarting, but to be safe we use the value that gdb considers
2495 to be current. One case where this might be necessary is if the
2496 user explicitly changes the PC value that gdb considers to be
2497 current. FIXME: Investigate if this is necessary or not. */
2499 #ifdef PRSVADDR_BROKEN
2500 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2501 place to put nPC. In fact, if you use this, nPC seems to be set to some
2502 random garbage. We have to rely on the fact that PC and nPC have been
2503 written previously via PIOCSREG during a register flush. */
2505 pi
->prrun
.pr_vaddr
= (caddr_t
) *(int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
2506 pi
->prrun
.pr_flags
!= PRSVADDR
;
2510 if (signo
== TARGET_SIGNAL_STOP
&& pi
->nopass_next_sigstop
)
2511 /* When attaching to a child process, if we forced it to stop with
2512 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2513 Upon resuming the first time after such a stop, we explicitly
2514 inhibit sending it another SIGSTOP, which would be the normal
2515 result of default signal handling. One potential drawback to
2516 this is that we will also ignore any attempt to by the user
2517 to explicitly continue after the attach with a SIGSTOP. Ultimately
2518 this problem should be dealt with by making the routines that
2519 deal with the inferior a little smarter, and possibly even allow
2520 an inferior to continue running at the same time as gdb. (FIXME?) */
2522 else if (signo
== TARGET_SIGNAL_TSTP
2523 && pi
->prstatus
.pr_cursig
== SIGTSTP
2524 && pi
->prstatus
.pr_action
.sa_handler
== SIG_DFL
)
2526 /* We are about to pass the inferior a SIGTSTP whose action is
2527 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2528 (notifying the parent via wait()), and then keep going from the
2529 same place when the parent is ready for you to keep going. So
2530 under the debugger, it should do nothing (as if the program had
2531 been stopped and then later resumed. Under ptrace, this
2532 happens for us, but under /proc, the system obligingly stops
2533 the process, and wait_for_inferior would have no way of
2534 distinguishing that type of stop (which indicates that we
2535 should just start it again), with a stop due to the pr_trace
2536 field of the prrun_t struct.
2538 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2539 because the handler needs to get executed. */
2542 signal_to_pass
= target_signal_to_host (signo
);
2546 set_proc_siginfo (pi
, signal_to_pass
);
2550 pi
->prrun
.pr_flags
|= PRCSIG
;
2552 pi
->nopass_next_sigstop
= 0;
2555 pi
->prrun
.pr_flags
|= PRSTEP
;
2557 if (ioctl (pi
->fd
, PIOCRUN
, &pi
->prrun
) != 0)
2559 perror_with_name (pi
->pathname
);
2565 /* Continue all the other threads that haven't had an event of
2569 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
2571 if (pi
!= procinfo
&& !procinfo
->had_event
)
2573 procinfo
->prrun
.pr_flags
&= PRSTEP
;
2574 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
2575 ioctl (procinfo
->fd
, PIOCSTATUS
, &procinfo
->prstatus
);
2576 if (ioctl (procinfo
->fd
, PIOCRUN
, &procinfo
->prrun
) < 0)
2578 if (ioctl (procinfo
->fd
, PIOCSTATUS
, &procinfo
->prstatus
) < 0)
2580 fprintf_unfiltered(gdb_stderr
, "PIOCSTATUS failed, errno=%d\n", errno
);
2582 print_sys_errmsg (procinfo
->pathname
, errno
);
2583 error ("PIOCRUN failed");
2585 ioctl (procinfo
->fd
, PIOCSTATUS
, &procinfo
->prstatus
);
2594 procfs_fetch_registers -- fetch current registers from inferior
2598 void procfs_fetch_registers (int regno)
2602 Read the current values of the inferior's registers, both the
2603 general register set and floating point registers (if supported)
2604 and update gdb's idea of their current values.
2609 procfs_fetch_registers (regno
)
2612 struct procinfo
*pi
;
2614 pi
= current_procinfo
;
2616 if (ioctl (pi
->fd
, PIOCGREG
, &pi
->gregset
) != -1)
2618 supply_gregset (&pi
->gregset
);
2620 #if defined (FP0_REGNUM)
2621 if (ioctl (pi
->fd
, PIOCGFPREG
, &pi
->fpregset
) != -1)
2623 supply_fpregset (&pi
->fpregset
);
2632 proc_init_failed - called whenever /proc access initialization
2637 static void proc_init_failed (struct procinfo *pi, char *why)
2641 This function is called whenever initialization of access to a /proc
2642 entry fails. It prints a suitable error message, does some cleanup,
2643 and then invokes the standard error processing routine which dumps
2644 us back into the command loop.
2648 proc_init_failed (pi
, why
)
2649 struct procinfo
*pi
;
2652 print_sys_errmsg (pi
->pathname
, errno
);
2653 kill (pi
->pid
, SIGKILL
);
2654 close_proc_file (pi
);
2663 close_proc_file - close any currently open /proc entry
2667 static void close_proc_file (struct procinfo *pip)
2671 Close any currently open /proc entry and mark the process information
2672 entry as invalid. In order to ensure that we don't try to reuse any
2673 stale information, the pid, fd, and pathnames are explicitly
2674 invalidated, which may be overkill.
2679 close_proc_file (pip
)
2680 struct procinfo
*pip
;
2682 struct procinfo
*procinfo
;
2684 remove_fd (pip
); /* Remove fd from poll/select list */
2688 free (pip
-> pathname
);
2690 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2692 if (procinfo_list
== pip
)
2693 procinfo_list
= pip
->next
;
2695 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
2696 if (procinfo
->next
== pip
)
2697 procinfo
->next
= pip
->next
;
2706 open_proc_file - open a /proc entry for a given process id
2710 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2714 Given a process id and a mode, close the existing open /proc
2715 entry (if any) and open one for the new process id, in the
2716 specified mode. Once it is open, then mark the local process
2717 information structure as valid, which guarantees that the pid,
2718 fd, and pathname fields match an open /proc entry. Returns
2719 zero if the open fails, nonzero otherwise.
2721 Note that the pathname is left intact, even when the open fails,
2722 so that callers can use it to construct meaningful error messages
2723 rather than just "file open failed".
2727 open_proc_file (pid
, pip
, mode
)
2729 struct procinfo
*pip
;
2733 pip
-> had_event
= 0;
2734 pip
-> pathname
= xmalloc (32);
2737 sprintf (pip
-> pathname
, PROC_NAME_FMT
, pid
);
2738 if ((pip
-> fd
= open (pip
-> pathname
, mode
)) < 0)
2745 mappingflags (flags
)
2748 static char asciiflags
[8];
2750 strcpy (asciiflags
, "-------");
2751 #if defined (MA_PHYS)
2752 if (flags
& MA_PHYS
) asciiflags
[0] = 'd';
2754 if (flags
& MA_STACK
) asciiflags
[1] = 's';
2755 if (flags
& MA_BREAK
) asciiflags
[2] = 'b';
2756 if (flags
& MA_SHARED
) asciiflags
[3] = 's';
2757 if (flags
& MA_READ
) asciiflags
[4] = 'r';
2758 if (flags
& MA_WRITE
) asciiflags
[5] = 'w';
2759 if (flags
& MA_EXEC
) asciiflags
[6] = 'x';
2760 return (asciiflags
);
2764 info_proc_flags (pip
, summary
)
2765 struct procinfo
*pip
;
2768 struct trans
*transp
;
2770 printf_filtered ("%-32s", "Process status flags:");
2773 printf_filtered ("\n\n");
2775 for (transp
= pr_flag_table
; transp
-> name
!= NULL
; transp
++)
2777 if (pip
-> prstatus
.pr_flags
& transp
-> value
)
2781 printf_filtered ("%s ", transp
-> name
);
2785 printf_filtered ("\t%-16s %s.\n", transp
-> name
, transp
-> desc
);
2789 printf_filtered ("\n");
2793 info_proc_stop (pip
, summary
)
2794 struct procinfo
*pip
;
2797 struct trans
*transp
;
2801 why
= pip
-> prstatus
.pr_why
;
2802 what
= pip
-> prstatus
.pr_what
;
2804 if (pip
-> prstatus
.pr_flags
& PR_STOPPED
)
2806 printf_filtered ("%-32s", "Reason for stopping:");
2809 printf_filtered ("\n\n");
2811 for (transp
= pr_why_table
; transp
-> name
!= NULL
; transp
++)
2813 if (why
== transp
-> value
)
2817 printf_filtered ("%s ", transp
-> name
);
2821 printf_filtered ("\t%-16s %s.\n",
2822 transp
-> name
, transp
-> desc
);
2828 /* Use the pr_why field to determine what the pr_what field means, and
2829 print more information. */
2834 /* pr_what is unused for this case */
2840 printf_filtered ("%s ", signalname (what
));
2844 printf_filtered ("\t%-16s %s.\n", signalname (what
),
2845 safe_strsignal (what
));
2851 printf_filtered ("%s ", syscallname (what
));
2855 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
2856 "Entered this system call");
2862 printf_filtered ("%s ", syscallname (what
));
2866 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
2867 "Returned from this system call");
2873 printf_filtered ("%s ",
2874 lookupname (faults_table
, what
, "fault"));
2878 printf_filtered ("\t%-16s %s.\n",
2879 lookupname (faults_table
, what
, "fault"),
2880 lookupdesc (faults_table
, what
));
2884 printf_filtered ("\n");
2889 info_proc_siginfo (pip
, summary
)
2890 struct procinfo
*pip
;
2893 struct siginfo
*sip
;
2895 if ((pip
-> prstatus
.pr_flags
& PR_STOPPED
) &&
2896 (pip
-> prstatus
.pr_why
== PR_SIGNALLED
||
2897 pip
-> prstatus
.pr_why
== PR_FAULTED
))
2899 printf_filtered ("%-32s", "Additional signal/fault info:");
2900 sip
= &pip
-> prstatus
.pr_info
;
2903 printf_filtered ("%s ", signalname (sip
-> si_signo
));
2904 if (sip
-> si_errno
> 0)
2906 printf_filtered ("%s ", errnoname (sip
-> si_errno
));
2908 if (sip
-> si_code
<= 0)
2910 printf_filtered ("sent by %s, uid %d ",
2911 target_pid_to_str (sip
-> si_pid
),
2916 printf_filtered ("%s ", sigcodename (sip
));
2917 if ((sip
-> si_signo
== SIGILL
) ||
2918 (sip
-> si_signo
== SIGFPE
) ||
2919 (sip
-> si_signo
== SIGSEGV
) ||
2920 (sip
-> si_signo
== SIGBUS
))
2922 printf_filtered ("addr=%#x ", sip
-> si_addr
);
2924 else if ((sip
-> si_signo
== SIGCHLD
))
2926 printf_filtered ("child %s, status %u ",
2927 target_pid_to_str (sip
-> si_pid
),
2930 else if ((sip
-> si_signo
== SIGPOLL
))
2932 printf_filtered ("band %u ", sip
-> si_band
);
2938 printf_filtered ("\n\n");
2939 printf_filtered ("\t%-16s %s.\n", signalname (sip
-> si_signo
),
2940 safe_strsignal (sip
-> si_signo
));
2941 if (sip
-> si_errno
> 0)
2943 printf_filtered ("\t%-16s %s.\n",
2944 errnoname (sip
-> si_errno
),
2945 safe_strerror (sip
-> si_errno
));
2947 if (sip
-> si_code
<= 0)
2949 printf_filtered ("\t%-16u %s\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
2950 "PID of process sending signal");
2951 printf_filtered ("\t%-16u %s\n", sip
-> si_uid
,
2952 "UID of process sending signal");
2956 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
2958 if ((sip
-> si_signo
== SIGILL
) ||
2959 (sip
-> si_signo
== SIGFPE
))
2961 printf_filtered ("\t%-16#x %s.\n", sip
-> si_addr
,
2962 "Address of faulting instruction");
2964 else if ((sip
-> si_signo
== SIGSEGV
) ||
2965 (sip
-> si_signo
== SIGBUS
))
2967 printf_filtered ("\t%-16#x %s.\n", sip
-> si_addr
,
2968 "Address of faulting memory reference");
2970 else if ((sip
-> si_signo
== SIGCHLD
))
2972 printf_filtered ("\t%-16u %s.\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
2973 "Child process ID");
2974 printf_filtered ("\t%-16u %s.\n", sip
-> si_status
,
2975 "Child process exit value or signal");
2977 else if ((sip
-> si_signo
== SIGPOLL
))
2979 printf_filtered ("\t%-16u %s.\n", sip
-> si_band
,
2980 "Band event for POLL_{IN,OUT,MSG}");
2984 printf_filtered ("\n");
2989 info_proc_syscalls (pip
, summary
)
2990 struct procinfo
*pip
;
2998 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
2999 if (pip
-> prstatus
.pr_flags
& PR_ASLEEP
)
3001 int syscallnum
= pip
-> prstatus
.pr_reg
[R_D0
];
3004 printf_filtered ("%-32s", "Sleeping in system call:");
3005 printf_filtered ("%s", syscallname (syscallnum
));
3009 printf_filtered ("Sleeping in system call '%s'.\n",
3010 syscallname (syscallnum
));
3015 if (ioctl (pip
-> fd
, PIOCGENTRY
, &pip
-> entryset
) < 0)
3017 print_sys_errmsg (pip
-> pathname
, errno
);
3018 error ("PIOCGENTRY failed");
3021 if (ioctl (pip
-> fd
, PIOCGEXIT
, &pip
-> exitset
) < 0)
3023 print_sys_errmsg (pip
-> pathname
, errno
);
3024 error ("PIOCGEXIT failed");
3027 printf_filtered ("System call tracing information:\n\n");
3029 printf_filtered ("\t%-12s %-8s %-8s\n",
3033 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
3036 if (syscall_table
[syscallnum
] != NULL
)
3038 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
3039 printf_filtered ("%-8s ",
3040 prismember (&pip
-> entryset
, syscallnum
)
3042 printf_filtered ("%-8s ",
3043 prismember (&pip
-> exitset
, syscallnum
)
3045 printf_filtered ("\n");
3048 printf_filtered ("\n");
3057 static char locbuf
[32];
3059 name
= strsigno (signo
);
3062 sprintf (locbuf
, "Signal %d", signo
);
3066 sprintf (locbuf
, "%s (%d)", name
, signo
);
3076 static char locbuf
[32];
3078 name
= strerrno (errnum
);
3081 sprintf (locbuf
, "Errno %d", errnum
);
3085 sprintf (locbuf
, "%s (%d)", name
, errnum
);
3091 info_proc_signals (pip
, summary
)
3092 struct procinfo
*pip
;
3099 if (ioctl (pip
-> fd
, PIOCGTRACE
, &pip
-> trace
) < 0)
3101 print_sys_errmsg (pip
-> pathname
, errno
);
3102 error ("PIOCGTRACE failed");
3105 printf_filtered ("Disposition of signals:\n\n");
3106 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3107 "Signal", "Trace", "Hold", "Pending", "Description");
3108 for (signo
= 0; signo
< NSIG
; signo
++)
3111 printf_filtered ("\t%-15s ", signalname (signo
));
3112 printf_filtered ("%-8s ",
3113 prismember (&pip
-> trace
, signo
)
3115 printf_filtered ("%-8s ",
3116 prismember (&pip
-> prstatus
.pr_sighold
, signo
)
3118 printf_filtered ("%-8s ",
3119 prismember (&pip
-> prstatus
.pr_sigpend
, signo
)
3121 printf_filtered (" %s\n", safe_strsignal (signo
));
3123 printf_filtered ("\n");
3128 info_proc_faults (pip
, summary
)
3129 struct procinfo
*pip
;
3132 struct trans
*transp
;
3136 if (ioctl (pip
-> fd
, PIOCGFAULT
, &pip
-> fltset
) < 0)
3138 print_sys_errmsg (pip
-> pathname
, errno
);
3139 error ("PIOCGFAULT failed");
3142 printf_filtered ("Current traced hardware fault set:\n\n");
3143 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3145 for (transp
= faults_table
; transp
-> name
!= NULL
; transp
++)
3148 printf_filtered ("\t%-12s ", transp
-> name
);
3149 printf_filtered ("%-8s", prismember (&pip
-> fltset
, transp
-> value
)
3151 printf_filtered ("\n");
3153 printf_filtered ("\n");
3158 info_proc_mappings (pip
, summary
)
3159 struct procinfo
*pip
;
3163 struct prmap
*prmaps
;
3164 struct prmap
*prmap
;
3168 printf_filtered ("Mapped address spaces:\n\n");
3169 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3175 if (ioctl (pip
-> fd
, PIOCNMAP
, &nmap
) == 0)
3177 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
3178 if (ioctl (pip
-> fd
, PIOCMAP
, prmaps
) == 0)
3180 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
3182 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
3184 prmap
-> pr_vaddr
+ prmap
-> pr_size
- 1,
3187 mappingflags (prmap
-> pr_mflags
));
3191 printf_filtered ("\n");
3199 info_proc -- implement the "info proc" command
3203 void info_proc (char *args, int from_tty)
3207 Implement gdb's "info proc" command by using the /proc interface
3208 to print status information about any currently running process.
3210 Examples of the use of "info proc" are:
3212 info proc (prints summary info for current inferior)
3213 info proc 123 (prints summary info for process with pid 123)
3214 info proc mappings (prints address mappings)
3215 info proc times (prints process/children times)
3216 info proc id (prints pid, ppid, gid, sid, etc)
3217 FIXME: i proc id not implemented.
3218 info proc status (prints general process state info)
3219 FIXME: i proc status not implemented.
3220 info proc signals (prints info about signal handling)
3221 info proc all (prints all info)
3226 info_proc (args
, from_tty
)
3231 struct procinfo
*pip
;
3232 struct cleanup
*old_chain
;
3246 old_chain
= make_cleanup (null_cleanup
, 0);
3248 /* Default to using the current inferior if no pid specified. Note
3249 that inferior_pid may be 0, hence we set okerr. */
3251 pip
= find_procinfo (inferior_pid
, 1);
3255 if ((argv
= buildargv (args
)) == NULL
)
3259 make_cleanup (freeargv
, (char *) argv
);
3261 while (*argv
!= NULL
)
3263 argsize
= strlen (*argv
);
3264 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
3269 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
3274 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
3279 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
3284 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
3289 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
3294 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
3299 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
3304 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
3309 else if ((pid
= atoi (*argv
)) > 0)
3311 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
3312 memset (pip
, 0, sizeof (*pip
));
3315 if (!open_proc_file (pid
, pip
, O_RDONLY
))
3317 perror_with_name (pip
-> pathname
);
3320 make_cleanup (close_proc_file
, pip
);
3322 else if (**argv
!= '\000')
3324 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
3330 /* If we don't have a valid open process at this point, then we have no
3331 inferior or didn't specify a specific pid. */
3336 No process. Start debugging a program or specify an explicit process ID.");
3338 if (ioctl (pip
-> fd
, PIOCSTATUS
, &(pip
-> prstatus
)) < 0)
3340 print_sys_errmsg (pip
-> pathname
, errno
);
3341 error ("PIOCSTATUS failed");
3344 /* Print verbose information of the requested type(s), or just a summary
3345 of the information for all types. */
3347 printf_filtered ("\nInformation for %s:\n\n", pip
-> pathname
);
3348 if (summary
|| all
|| flags
)
3350 info_proc_flags (pip
, summary
);
3354 info_proc_stop (pip
, summary
);
3356 if (summary
|| all
|| signals
|| faults
)
3358 info_proc_siginfo (pip
, summary
);
3360 if (summary
|| all
|| syscalls
)
3362 info_proc_syscalls (pip
, summary
);
3364 if (summary
|| all
|| mappings
)
3366 info_proc_mappings (pip
, summary
);
3368 if (summary
|| all
|| signals
)
3370 info_proc_signals (pip
, summary
);
3372 if (summary
|| all
|| faults
)
3374 info_proc_faults (pip
, summary
);
3376 printf_filtered ("\n");
3378 /* All done, deal with closing any temporary process info structure,
3379 freeing temporary memory , etc. */
3381 do_cleanups (old_chain
);
3388 procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
3392 void procfs_set_sproc_trap (void)
3396 This function sets up a trap on sproc system call exits so that we can
3397 detect the arrival of a new thread. We are called with the child
3398 stopped prior to it's first instruction.
3400 Also note that we turn on the inherit-on-fork flag in the child process
3401 so that any grand-children start with all tracing flags set.
3407 procfs_set_sproc_trap (pi
)
3408 struct procinfo
*pi
;
3412 if (ioctl (pi
->fd
, PIOCGEXIT
, &exitset
) < 0)
3414 print_sys_errmsg (pi
->pathname
, errno
);
3415 error ("PIOCGEXIT failed");
3418 praddset (&exitset
, SYS_sproc
);
3420 if (ioctl (pi
->fd
, PIOCSEXIT
, &exitset
) < 0)
3422 print_sys_errmsg (pi
->pathname
, errno
);
3423 error ("PIOCSEXIT failed");
3426 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3427 tracing flags set. */
3429 #ifdef PIOCSET /* New method */
3433 ioctl (pi
->fd
, PIOCSET
, &pr_flags
);
3436 #ifdef PIOCSFORK /* Original method */
3437 ioctl (pi
->fd
, PIOCSFORK
, NULL
);
3441 #endif /* SYS_sproc */
3443 /* Fork an inferior process, and start debugging it with /proc. */
3446 procfs_create_inferior (exec_file
, allargs
, env
)
3451 fork_inferior (exec_file
, allargs
, env
,
3452 proc_set_exec_trap
, procfs_init_inferior
);
3453 /* We are at the first instruction we care about. */
3454 /* Pedal to the metal... */
3456 /* Setup traps on exit from sproc() */
3459 procfs_set_sproc_trap (current_procinfo
);
3462 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
3465 /* Clean up after the inferior dies. */
3468 procfs_mourn_inferior ()
3470 struct procinfo
*pi
;
3472 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3473 unconditionally_kill_inferior (pi
);
3475 unpush_target (&procfs_ops
);
3476 generic_mourn_inferior ();
3479 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3486 struct target_ops procfs_ops
= {
3487 "procfs", /* to_shortname */
3488 "Unix /proc child process", /* to_longname */
3489 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3490 procfs_open
, /* to_open */
3492 procfs_attach
, /* to_attach */
3493 procfs_detach
, /* to_detach */
3494 procfs_resume
, /* to_resume */
3495 procfs_wait
, /* to_wait */
3496 procfs_fetch_registers
, /* to_fetch_registers */
3497 procfs_store_registers
, /* to_store_registers */
3498 procfs_prepare_to_store
, /* to_prepare_to_store */
3499 procfs_xfer_memory
, /* to_xfer_memory */
3500 procfs_files_info
, /* to_files_info */
3501 memory_insert_breakpoint
, /* to_insert_breakpoint */
3502 memory_remove_breakpoint
, /* to_remove_breakpoint */
3503 terminal_init_inferior
, /* to_terminal_init */
3504 terminal_inferior
, /* to_terminal_inferior */
3505 terminal_ours_for_output
, /* to_terminal_ours_for_output */
3506 terminal_ours
, /* to_terminal_ours */
3507 child_terminal_info
, /* to_terminal_info */
3508 procfs_kill_inferior
, /* to_kill */
3510 0, /* to_lookup_symbol */
3511 procfs_create_inferior
, /* to_create_inferior */
3512 procfs_mourn_inferior
, /* to_mourn_inferior */
3513 procfs_can_run
, /* to_can_run */
3514 procfs_notice_signals
, /* to_notice_signals */
3515 process_stratum
, /* to_stratum */
3517 1, /* to_has_all_memory */
3518 1, /* to_has_memory */
3519 1, /* to_has_stack */
3520 1, /* to_has_registers */
3521 1, /* to_has_execution */
3523 0, /* sections_end */
3524 OPS_MAGIC
/* to_magic */
3528 _initialize_procfs ()
3530 add_target (&procfs_ops
);
3532 add_info ("proc", info_proc
,
3533 "Show process status information using /proc entry.\n\
3534 Specify process id or use current inferior by default.\n\
3535 Specify keywords for detailed information; default is summary.\n\
3536 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3537 `status', `syscalls', and `times'.\n\
3538 Unambiguous abbreviations may be used.");
3540 init_syscall_table ();