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.
37 #include <sys/types.h>
39 #include <sys/procfs.h>
53 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
56 #define PROC_NAME_FMT "/proc/%05d"
59 extern struct target_ops procfs_ops; /* Forward declaration */
61 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
62 CORE_ADDR kernel_u_addr;
65 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
67 #define si_pid _data._proc.pid
69 #define si_uid _data._proc._pdata._kill.uid
70 #endif /* BROKEN_SIGINFO_H */
72 /* All access to the inferior, either one started by gdb or one that has
73 been attached to, is controlled by an instance of a procinfo structure,
74 defined below. Since gdb currently only handles one inferior at a time,
75 the procinfo structure for the inferior is statically allocated and
76 only one exists at any given time. There is a separate procinfo
77 structure for use by the "info proc" command, so that we can print
78 useful information about any random process without interfering with
79 the inferior's procinfo information. */
82 struct procinfo *next;
83 int pid; /* Process ID of inferior */
84 int fd; /* File descriptor for /proc entry */
85 char *pathname; /* Pathname to /proc entry */
86 int had_event; /* poll/select says something happened */
87 int was_stopped; /* Nonzero if was stopped prior to attach */
88 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
89 prrun_t prrun; /* Control state when it is run */
90 prstatus_t prstatus; /* Current process status info */
91 gregset_t gregset; /* General register set */
92 fpregset_t fpregset; /* Floating point register set */
93 fltset_t fltset; /* Current traced hardware fault set */
94 sigset_t trace; /* Current traced signal set */
95 sysset_t exitset; /* Current traced system call exit set */
96 sysset_t entryset; /* Current traced system call entry set */
97 fltset_t saved_fltset; /* Saved traced hardware fault set */
98 sigset_t saved_trace; /* Saved traced signal set */
99 sigset_t saved_sighold; /* Saved held signal set */
100 sysset_t saved_exitset; /* Saved traced system call exit set */
101 sysset_t saved_entryset; /* Saved traced system call entry set */
104 /* List of inferior process information */
105 static struct procinfo *procinfo_list = NULL;
107 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
109 static int num_poll_list = 0; /* Number of entries in poll_list */
111 static int last_resume_pid = -1; /* Last pid used with procfs_resume */
113 /* Much of the information used in the /proc interface, particularly for
114 printing status information, is kept as tables of structures of the
115 following form. These tables can be used to map numeric values to
116 their symbolic names and to a string that describes their specific use. */
119 int value; /* The numeric value */
120 char *name; /* The equivalent symbolic value */
121 char *desc; /* Short description of value */
124 /* Translate bits in the pr_flags member of the prstatus structure, into the
125 names and desc information. */
127 static struct trans pr_flag_table[] =
129 #if defined (PR_STOPPED)
130 PR_STOPPED, "PR_STOPPED", "Process is stopped",
132 #if defined (PR_ISTOP)
133 PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
135 #if defined (PR_DSTOP)
136 PR_DSTOP, "PR_DSTOP", "A stop directive is in effect",
138 #if defined (PR_ASLEEP)
139 PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call",
141 #if defined (PR_FORK)
142 PR_FORK, "PR_FORK", "Inherit-on-fork is in effect",
145 PR_RLC, "PR_RLC", "Run-on-last-close is in effect",
147 #if defined (PR_PTRACE)
148 PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace",
150 #if defined (PR_PCINVAL)
151 PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address",
153 #if defined (PR_ISSYS)
154 PR_ISSYS, "PR_ISSYS", "Is a system process",
156 #if defined (PR_STEP)
157 PR_STEP, "PR_STEP", "Process has single step pending",
160 PR_KLC, "PR_KLC", "Kill-on-last-close is in effect",
162 #if defined (PR_ASYNC)
163 PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect",
165 #if defined (PR_PCOMPAT)
166 PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
171 /* Translate values in the pr_why field of the prstatus struct. */
173 static struct trans pr_why_table[] =
175 #if defined (PR_REQUESTED)
176 PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
178 #if defined (PR_SIGNALLED)
179 PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal",
181 #if defined (PR_FAULTED)
182 PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault",
184 #if defined (PR_SYSENTRY)
185 PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
187 #if defined (PR_SYSEXIT)
188 PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call",
190 #if defined (PR_JOBCONTROL)
191 PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action",
193 #if defined (PR_SUSPENDED)
194 PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
199 /* Hardware fault translation table. */
201 static struct trans faults_table[] =
204 FLTILL, "FLTILL", "Illegal instruction",
206 #if defined (FLTPRIV)
207 FLTPRIV, "FLTPRIV", "Privileged instruction",
210 FLTBPT, "FLTBPT", "Breakpoint trap",
212 #if defined (FLTTRACE)
213 FLTTRACE, "FLTTRACE", "Trace trap",
215 #if defined (FLTACCESS)
216 FLTACCESS, "FLTACCESS", "Memory access fault",
218 #if defined (FLTBOUNDS)
219 FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
221 #if defined (FLTIOVF)
222 FLTIOVF, "FLTIOVF", "Integer overflow",
224 #if defined (FLTIZDIV)
225 FLTIZDIV, "FLTIZDIV", "Integer zero divide",
228 FLTFPE, "FLTFPE", "Floating-point exception",
230 #if defined (FLTSTACK)
231 FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
233 #if defined (FLTPAGE)
234 FLTPAGE, "FLTPAGE", "Recoverable page fault",
239 /* Translation table for signal generation information. See UNIX System
240 V Release 4 Programmer's Reference Manual, siginfo(5). */
242 static struct sigcode {
247 } siginfo_table[] = {
248 #if defined (SIGILL) && defined (ILL_ILLOPC)
249 SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
251 #if defined (SIGILL) && defined (ILL_ILLOPN)
252 SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
254 #if defined (SIGILL) && defined (ILL_ILLADR)
255 SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
257 #if defined (SIGILL) && defined (ILL_ILLTRP)
258 SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
260 #if defined (SIGILL) && defined (ILL_PRVOPC)
261 SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
263 #if defined (SIGILL) && defined (ILL_PRVREG)
264 SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
266 #if defined (SIGILL) && defined (ILL_COPROC)
267 SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
269 #if defined (SIGILL) && defined (ILL_BADSTK)
270 SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
272 #if defined (SIGFPE) && defined (FPE_INTDIV)
273 SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
275 #if defined (SIGFPE) && defined (FPE_INTOVF)
276 SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
278 #if defined (SIGFPE) && defined (FPE_FLTDIV)
279 SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
281 #if defined (SIGFPE) && defined (FPE_FLTOVF)
282 SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow",
284 #if defined (SIGFPE) && defined (FPE_FLTUND)
285 SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
287 #if defined (SIGFPE) && defined (FPE_FLTRES)
288 SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
290 #if defined (SIGFPE) && defined (FPE_FLTINV)
291 SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation",
293 #if defined (SIGFPE) && defined (FPE_FLTSUB)
294 SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range",
296 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
297 SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object",
299 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
300 SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object",
302 #if defined (SIGBUS) && defined (BUS_ADRALN)
303 SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
305 #if defined (SIGBUS) && defined (BUS_ADRERR)
306 SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
308 #if defined (SIGBUS) && defined (BUS_OBJERR)
309 SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error",
311 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
312 SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
314 #if defined (SIGTRAP) && defined (TRAP_TRACE)
315 SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
317 #if defined (SIGCLD) && defined (CLD_EXITED)
318 SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
320 #if defined (SIGCLD) && defined (CLD_KILLED)
321 SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed",
323 #if defined (SIGCLD) && defined (CLD_DUMPED)
324 SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally",
326 #if defined (SIGCLD) && defined (CLD_TRAPPED)
327 SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped",
329 #if defined (SIGCLD) && defined (CLD_STOPPED)
330 SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped",
332 #if defined (SIGCLD) && defined (CLD_CONTINUED)
333 SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued",
335 #if defined (SIGPOLL) && defined (POLL_IN)
336 SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
338 #if defined (SIGPOLL) && defined (POLL_OUT)
339 SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
341 #if defined (SIGPOLL) && defined (POLL_MSG)
342 SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
344 #if defined (SIGPOLL) && defined (POLL_ERR)
345 SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
347 #if defined (SIGPOLL) && defined (POLL_PRI)
348 SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
350 #if defined (SIGPOLL) && defined (POLL_HUP)
351 SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
356 static char *syscall_table[MAX_SYSCALLS];
358 /* Prototypes for local functions */
361 set_proc_siginfo PARAMS ((struct procinfo *, int));
364 init_syscall_table PARAMS ((void));
367 syscallname PARAMS ((int));
370 signalname PARAMS ((int));
373 errnoname PARAMS ((int));
376 proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
379 open_proc_file PARAMS ((int, struct procinfo *, int));
382 close_proc_file PARAMS ((struct procinfo *));
385 unconditionally_kill_inferior PARAMS ((struct procinfo *));
388 proc_init_failed PARAMS ((struct procinfo *, char *));
391 info_proc PARAMS ((char *, int));
394 info_proc_flags PARAMS ((struct procinfo *, int));
397 info_proc_stop PARAMS ((struct procinfo *, int));
400 info_proc_siginfo PARAMS ((struct procinfo *, int));
403 info_proc_syscalls PARAMS ((struct procinfo *, int));
406 info_proc_mappings PARAMS ((struct procinfo *, int));
409 info_proc_signals PARAMS ((struct procinfo *, int));
412 info_proc_faults PARAMS ((struct procinfo *, int));
415 mappingflags PARAMS ((long));
418 lookupname PARAMS ((struct trans *, unsigned int, char *));
421 lookupdesc PARAMS ((struct trans *, unsigned int));
424 do_attach PARAMS ((int pid));
427 do_detach PARAMS ((int siggnal));
430 procfs_create_inferior PARAMS ((char *, char *, char **));
433 procfs_notice_signals PARAMS ((int pid));
435 static struct procinfo *
436 find_procinfo PARAMS ((pid_t pid, int okfail));
438 /* External function prototypes that can't be easily included in any
439 header file because the args are typedefs in system include files. */
442 supply_gregset PARAMS ((gregset_t *));
445 fill_gregset PARAMS ((gregset_t *, int));
448 supply_fpregset PARAMS ((fpregset_t *));
451 fill_fpregset PARAMS ((fpregset_t *, int));
457 find_procinfo -- convert a process id to a struct procinfo
461 static struct procinfo * find_procinfo (pid_t pid, int okfail);
465 Given a process id, look it up in the procinfo chain. Returns
466 a struct procinfo *. If can't find pid, then call error(),
467 unless okfail is set, in which case, return NULL;
470 static struct procinfo *
471 find_procinfo (pid, okfail)
475 struct procinfo *procinfo;
477 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
478 if (procinfo->pid == pid)
484 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
491 current_procinfo -- convert inferior_pid to a struct procinfo
495 static struct procinfo * current_procinfo;
499 Looks up inferior_pid in the procinfo chain. Always returns a
500 struct procinfo *. If process can't be found, we error() out.
503 #define current_procinfo find_procinfo (inferior_pid, 0)
509 add_fd -- Add the fd to the poll/select list
513 static void add_fd (struct procinfo *);
517 Add the fd of the supplied procinfo to the list of fds used for
518 poll/select operations.
525 if (num_poll_list <= 0)
526 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
528 poll_list = (struct pollfd *) xrealloc (poll_list,
530 * sizeof (struct pollfd));
531 poll_list[num_poll_list].fd = pi->fd;
532 poll_list[num_poll_list].events = POLLPRI;
543 for (i = 0; i < num_poll_list; i++)
545 if (poll_list[i].fd == pi->fd)
547 if (i != num_poll_list - 1)
548 memcpy (poll_list, poll_list + i + 1,
549 (num_poll_list - i - 1) * sizeof (struct pollfd));
553 if (num_poll_list == 0)
556 poll_list = (struct pollfd *) xrealloc (poll_list,
558 * sizeof (struct pollfd));
564 #define LOSING_POLL unixware_sux
566 static struct procinfo *
574 set_sigint_trap (); /* Causes SIGINT to be passed on to the
578 num_fds = poll (poll_list, num_poll_list, -1);
580 pi = current_procinfo;
582 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
584 print_sys_errmsg (pi->pathname, errno);
585 error ("PIOCWSTOP failed");
597 print_sys_errmsg ("poll failed\n", errno);
598 error ("Poll failed, returned %d", num_fds);
601 for (i = 0; i < num_poll_list && num_fds > 0; i++)
603 if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
605 for (pi = procinfo_list; pi; pi = pi->next)
607 if (poll_list[i].fd == pi->fd)
609 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
611 print_sys_errmsg (pi->pathname, errno);
612 error ("PIOCSTATUS failed");
620 error ("procfs_wait: Couldn't find procinfo for fd %d\n",
623 #endif /* LOSING_POLL */
632 lookupdesc -- translate a value to a summary desc string
636 static char *lookupdesc (struct trans *transp, unsigned int val);
640 Given a pointer to a translation table and a value to be translated,
641 lookup the desc string and return it.
645 lookupdesc (transp, val)
646 struct trans *transp;
651 for (desc = NULL; transp -> name != NULL; transp++)
653 if (transp -> value == val)
655 desc = transp -> desc;
660 /* Didn't find a translation for the specified value, set a default one. */
673 lookupname -- translate a value to symbolic name
677 static char *lookupname (struct trans *transp, unsigned int val,
682 Given a pointer to a translation table, a value to be translated,
683 and a default prefix to return if the value can't be translated,
684 match the value with one of the translation table entries and
685 return a pointer to the symbolic name.
687 If no match is found it just returns the value as a printable string,
688 with the given prefix. The previous such value, if any, is freed
693 lookupname (transp, val, prefix)
694 struct trans *transp;
701 for (name = NULL; transp -> name != NULL; transp++)
703 if (transp -> value == val)
705 name = transp -> name;
710 /* Didn't find a translation for the specified value, build a default
711 one using the specified prefix and return it. The lifetime of
712 the value is only until the next one is needed. */
720 locbuf = xmalloc (strlen (prefix) + 16);
721 sprintf (locbuf, "%s %u", prefix, val);
733 static char locbuf[32];
735 for (scp = siginfo_table; scp -> codename != NULL; scp++)
737 if ((scp -> signo == sip -> si_signo) &&
738 (scp -> code == sip -> si_code))
740 name = scp -> codename;
746 sprintf (locbuf, "sigcode %u", sip -> si_signo);
759 for (scp = siginfo_table; scp -> codename != NULL; scp++)
761 if ((scp -> signo == sip -> si_signo) &&
762 (scp -> code == sip -> si_code))
770 desc = "Unrecognized signal or trap use";
779 syscallname - translate a system call number into a system call name
783 char *syscallname (int syscallnum)
787 Given a system call number, translate it into the printable name
788 of a system call, or into "syscall <num>" if it is an unknown
793 syscallname (syscallnum)
796 static char locbuf[32];
799 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
801 rtnval = syscall_table[syscallnum];
805 sprintf (locbuf, "syscall %u", syscallnum);
815 init_syscall_table - initialize syscall translation table
819 void init_syscall_table (void)
823 Dynamically initialize the translation table to convert system
824 call numbers into printable system call names. Done once per
825 gdb run, on initialization.
829 This is awfully ugly, but preprocessor tricks to make it prettier
830 tend to be nonportable.
834 init_syscall_table ()
836 #if defined (SYS_exit)
837 syscall_table[SYS_exit] = "exit";
839 #if defined (SYS_fork)
840 syscall_table[SYS_fork] = "fork";
842 #if defined (SYS_read)
843 syscall_table[SYS_read] = "read";
845 #if defined (SYS_write)
846 syscall_table[SYS_write] = "write";
848 #if defined (SYS_open)
849 syscall_table[SYS_open] = "open";
851 #if defined (SYS_close)
852 syscall_table[SYS_close] = "close";
854 #if defined (SYS_wait)
855 syscall_table[SYS_wait] = "wait";
857 #if defined (SYS_creat)
858 syscall_table[SYS_creat] = "creat";
860 #if defined (SYS_link)
861 syscall_table[SYS_link] = "link";
863 #if defined (SYS_unlink)
864 syscall_table[SYS_unlink] = "unlink";
866 #if defined (SYS_exec)
867 syscall_table[SYS_exec] = "exec";
869 #if defined (SYS_execv)
870 syscall_table[SYS_execv] = "execv";
872 #if defined (SYS_execve)
873 syscall_table[SYS_execve] = "execve";
875 #if defined (SYS_chdir)
876 syscall_table[SYS_chdir] = "chdir";
878 #if defined (SYS_time)
879 syscall_table[SYS_time] = "time";
881 #if defined (SYS_mknod)
882 syscall_table[SYS_mknod] = "mknod";
884 #if defined (SYS_chmod)
885 syscall_table[SYS_chmod] = "chmod";
887 #if defined (SYS_chown)
888 syscall_table[SYS_chown] = "chown";
890 #if defined (SYS_brk)
891 syscall_table[SYS_brk] = "brk";
893 #if defined (SYS_stat)
894 syscall_table[SYS_stat] = "stat";
896 #if defined (SYS_lseek)
897 syscall_table[SYS_lseek] = "lseek";
899 #if defined (SYS_getpid)
900 syscall_table[SYS_getpid] = "getpid";
902 #if defined (SYS_mount)
903 syscall_table[SYS_mount] = "mount";
905 #if defined (SYS_umount)
906 syscall_table[SYS_umount] = "umount";
908 #if defined (SYS_setuid)
909 syscall_table[SYS_setuid] = "setuid";
911 #if defined (SYS_getuid)
912 syscall_table[SYS_getuid] = "getuid";
914 #if defined (SYS_stime)
915 syscall_table[SYS_stime] = "stime";
917 #if defined (SYS_ptrace)
918 syscall_table[SYS_ptrace] = "ptrace";
920 #if defined (SYS_alarm)
921 syscall_table[SYS_alarm] = "alarm";
923 #if defined (SYS_fstat)
924 syscall_table[SYS_fstat] = "fstat";
926 #if defined (SYS_pause)
927 syscall_table[SYS_pause] = "pause";
929 #if defined (SYS_utime)
930 syscall_table[SYS_utime] = "utime";
932 #if defined (SYS_stty)
933 syscall_table[SYS_stty] = "stty";
935 #if defined (SYS_gtty)
936 syscall_table[SYS_gtty] = "gtty";
938 #if defined (SYS_access)
939 syscall_table[SYS_access] = "access";
941 #if defined (SYS_nice)
942 syscall_table[SYS_nice] = "nice";
944 #if defined (SYS_statfs)
945 syscall_table[SYS_statfs] = "statfs";
947 #if defined (SYS_sync)
948 syscall_table[SYS_sync] = "sync";
950 #if defined (SYS_kill)
951 syscall_table[SYS_kill] = "kill";
953 #if defined (SYS_fstatfs)
954 syscall_table[SYS_fstatfs] = "fstatfs";
956 #if defined (SYS_pgrpsys)
957 syscall_table[SYS_pgrpsys] = "pgrpsys";
959 #if defined (SYS_xenix)
960 syscall_table[SYS_xenix] = "xenix";
962 #if defined (SYS_dup)
963 syscall_table[SYS_dup] = "dup";
965 #if defined (SYS_pipe)
966 syscall_table[SYS_pipe] = "pipe";
968 #if defined (SYS_times)
969 syscall_table[SYS_times] = "times";
971 #if defined (SYS_profil)
972 syscall_table[SYS_profil] = "profil";
974 #if defined (SYS_plock)
975 syscall_table[SYS_plock] = "plock";
977 #if defined (SYS_setgid)
978 syscall_table[SYS_setgid] = "setgid";
980 #if defined (SYS_getgid)
981 syscall_table[SYS_getgid] = "getgid";
983 #if defined (SYS_signal)
984 syscall_table[SYS_signal] = "signal";
986 #if defined (SYS_msgsys)
987 syscall_table[SYS_msgsys] = "msgsys";
989 #if defined (SYS_sys3b)
990 syscall_table[SYS_sys3b] = "sys3b";
992 #if defined (SYS_acct)
993 syscall_table[SYS_acct] = "acct";
995 #if defined (SYS_shmsys)
996 syscall_table[SYS_shmsys] = "shmsys";
998 #if defined (SYS_semsys)
999 syscall_table[SYS_semsys] = "semsys";
1001 #if defined (SYS_ioctl)
1002 syscall_table[SYS_ioctl] = "ioctl";
1004 #if defined (SYS_uadmin)
1005 syscall_table[SYS_uadmin] = "uadmin";
1007 #if defined (SYS_utssys)
1008 syscall_table[SYS_utssys] = "utssys";
1010 #if defined (SYS_fsync)
1011 syscall_table[SYS_fsync] = "fsync";
1013 #if defined (SYS_umask)
1014 syscall_table[SYS_umask] = "umask";
1016 #if defined (SYS_chroot)
1017 syscall_table[SYS_chroot] = "chroot";
1019 #if defined (SYS_fcntl)
1020 syscall_table[SYS_fcntl] = "fcntl";
1022 #if defined (SYS_ulimit)
1023 syscall_table[SYS_ulimit] = "ulimit";
1025 #if defined (SYS_rfsys)
1026 syscall_table[SYS_rfsys] = "rfsys";
1028 #if defined (SYS_rmdir)
1029 syscall_table[SYS_rmdir] = "rmdir";
1031 #if defined (SYS_mkdir)
1032 syscall_table[SYS_mkdir] = "mkdir";
1034 #if defined (SYS_getdents)
1035 syscall_table[SYS_getdents] = "getdents";
1037 #if defined (SYS_sysfs)
1038 syscall_table[SYS_sysfs] = "sysfs";
1040 #if defined (SYS_getmsg)
1041 syscall_table[SYS_getmsg] = "getmsg";
1043 #if defined (SYS_putmsg)
1044 syscall_table[SYS_putmsg] = "putmsg";
1046 #if defined (SYS_poll)
1047 syscall_table[SYS_poll] = "poll";
1049 #if defined (SYS_lstat)
1050 syscall_table[SYS_lstat] = "lstat";
1052 #if defined (SYS_symlink)
1053 syscall_table[SYS_symlink] = "symlink";
1055 #if defined (SYS_readlink)
1056 syscall_table[SYS_readlink] = "readlink";
1058 #if defined (SYS_setgroups)
1059 syscall_table[SYS_setgroups] = "setgroups";
1061 #if defined (SYS_getgroups)
1062 syscall_table[SYS_getgroups] = "getgroups";
1064 #if defined (SYS_fchmod)
1065 syscall_table[SYS_fchmod] = "fchmod";
1067 #if defined (SYS_fchown)
1068 syscall_table[SYS_fchown] = "fchown";
1070 #if defined (SYS_sigprocmask)
1071 syscall_table[SYS_sigprocmask] = "sigprocmask";
1073 #if defined (SYS_sigsuspend)
1074 syscall_table[SYS_sigsuspend] = "sigsuspend";
1076 #if defined (SYS_sigaltstack)
1077 syscall_table[SYS_sigaltstack] = "sigaltstack";
1079 #if defined (SYS_sigaction)
1080 syscall_table[SYS_sigaction] = "sigaction";
1082 #if defined (SYS_sigpending)
1083 syscall_table[SYS_sigpending] = "sigpending";
1085 #if defined (SYS_context)
1086 syscall_table[SYS_context] = "context";
1088 #if defined (SYS_evsys)
1089 syscall_table[SYS_evsys] = "evsys";
1091 #if defined (SYS_evtrapret)
1092 syscall_table[SYS_evtrapret] = "evtrapret";
1094 #if defined (SYS_statvfs)
1095 syscall_table[SYS_statvfs] = "statvfs";
1097 #if defined (SYS_fstatvfs)
1098 syscall_table[SYS_fstatvfs] = "fstatvfs";
1100 #if defined (SYS_nfssys)
1101 syscall_table[SYS_nfssys] = "nfssys";
1103 #if defined (SYS_waitsys)
1104 syscall_table[SYS_waitsys] = "waitsys";
1106 #if defined (SYS_sigsendsys)
1107 syscall_table[SYS_sigsendsys] = "sigsendsys";
1109 #if defined (SYS_hrtsys)
1110 syscall_table[SYS_hrtsys] = "hrtsys";
1112 #if defined (SYS_acancel)
1113 syscall_table[SYS_acancel] = "acancel";
1115 #if defined (SYS_async)
1116 syscall_table[SYS_async] = "async";
1118 #if defined (SYS_priocntlsys)
1119 syscall_table[SYS_priocntlsys] = "priocntlsys";
1121 #if defined (SYS_pathconf)
1122 syscall_table[SYS_pathconf] = "pathconf";
1124 #if defined (SYS_mincore)
1125 syscall_table[SYS_mincore] = "mincore";
1127 #if defined (SYS_mmap)
1128 syscall_table[SYS_mmap] = "mmap";
1130 #if defined (SYS_mprotect)
1131 syscall_table[SYS_mprotect] = "mprotect";
1133 #if defined (SYS_munmap)
1134 syscall_table[SYS_munmap] = "munmap";
1136 #if defined (SYS_fpathconf)
1137 syscall_table[SYS_fpathconf] = "fpathconf";
1139 #if defined (SYS_vfork)
1140 syscall_table[SYS_vfork] = "vfork";
1142 #if defined (SYS_fchdir)
1143 syscall_table[SYS_fchdir] = "fchdir";
1145 #if defined (SYS_readv)
1146 syscall_table[SYS_readv] = "readv";
1148 #if defined (SYS_writev)
1149 syscall_table[SYS_writev] = "writev";
1151 #if defined (SYS_xstat)
1152 syscall_table[SYS_xstat] = "xstat";
1154 #if defined (SYS_lxstat)
1155 syscall_table[SYS_lxstat] = "lxstat";
1157 #if defined (SYS_fxstat)
1158 syscall_table[SYS_fxstat] = "fxstat";
1160 #if defined (SYS_xmknod)
1161 syscall_table[SYS_xmknod] = "xmknod";
1163 #if defined (SYS_clocal)
1164 syscall_table[SYS_clocal] = "clocal";
1166 #if defined (SYS_setrlimit)
1167 syscall_table[SYS_setrlimit] = "setrlimit";
1169 #if defined (SYS_getrlimit)
1170 syscall_table[SYS_getrlimit] = "getrlimit";
1172 #if defined (SYS_lchown)
1173 syscall_table[SYS_lchown] = "lchown";
1175 #if defined (SYS_memcntl)
1176 syscall_table[SYS_memcntl] = "memcntl";
1178 #if defined (SYS_getpmsg)
1179 syscall_table[SYS_getpmsg] = "getpmsg";
1181 #if defined (SYS_putpmsg)
1182 syscall_table[SYS_putpmsg] = "putpmsg";
1184 #if defined (SYS_rename)
1185 syscall_table[SYS_rename] = "rename";
1187 #if defined (SYS_uname)
1188 syscall_table[SYS_uname] = "uname";
1190 #if defined (SYS_setegid)
1191 syscall_table[SYS_setegid] = "setegid";
1193 #if defined (SYS_sysconfig)
1194 syscall_table[SYS_sysconfig] = "sysconfig";
1196 #if defined (SYS_adjtime)
1197 syscall_table[SYS_adjtime] = "adjtime";
1199 #if defined (SYS_systeminfo)
1200 syscall_table[SYS_systeminfo] = "systeminfo";
1202 #if defined (SYS_seteuid)
1203 syscall_table[SYS_seteuid] = "seteuid";
1205 #if defined (SYS_sproc)
1206 syscall_table[SYS_sproc] = "sproc";
1214 procfs_kill_inferior - kill any currently inferior
1218 void procfs_kill_inferior (void)
1222 Kill any current inferior.
1226 Kills even attached inferiors. Presumably the user has already
1227 been prompted that the inferior is an attached one rather than
1228 one started by gdb. (FIXME?)
1233 procfs_kill_inferior ()
1235 target_mourn_inferior ();
1242 unconditionally_kill_inferior - terminate the inferior
1246 static void unconditionally_kill_inferior (struct procinfo *)
1250 Kill the specified inferior.
1254 A possibly useful enhancement would be to first try sending
1255 the inferior a terminate signal, politely asking it to commit
1256 suicide, before we murder it (we could call that
1257 politely_kill_inferior()).
1262 unconditionally_kill_inferior (pi)
1263 struct procinfo *pi;
1268 ppid = pi->prstatus.pr_ppid;
1271 ioctl (pi->fd, PIOCKILL, &signo);
1272 close_proc_file (pi);
1274 /* Only wait() for our direct children. Our grandchildren zombies are killed
1275 by the death of their parents. */
1277 if (ppid == getpid())
1285 procfs_xfer_memory -- copy data to or from inferior memory space
1289 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1290 int dowrite, struct target_ops target)
1294 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1295 from/to debugger memory starting at MYADDR. Copy from inferior
1296 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1298 Returns the length copied, which is either the LEN argument or
1299 zero. This xfer function does not do partial moves, since procfs_ops
1300 doesn't allow memory operations to cross below us in the target stack
1305 The /proc interface makes this an almost trivial task.
1309 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1314 struct target_ops *target; /* ignored */
1317 struct procinfo *pi;
1319 pi = current_procinfo;
1321 if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
1325 nbytes = write (pi->fd, myaddr, len);
1329 nbytes = read (pi->fd, myaddr, len);
1343 procfs_store_registers -- copy register values back to inferior
1347 void procfs_store_registers (int regno)
1351 Store our current register values back into the inferior. If
1352 REGNO is -1 then store all the register, otherwise store just
1353 the value specified by REGNO.
1357 If we are storing only a single register, we first have to get all
1358 the current values from the process, overwrite the desired register
1359 in the gregset with the one we want from gdb's registers, and then
1360 send the whole set back to the process. For writing all the
1361 registers, all we have to do is generate the gregset and send it to
1364 Also note that the process has to be stopped on an event of interest
1365 for this to work, which basically means that it has to have been
1366 run under the control of one of the other /proc ioctl calls and not
1367 ptrace. Since we don't use ptrace anyway, we don't worry about this
1368 fine point, but it is worth noting for future reference.
1370 Gdb is confused about what this function is supposed to return.
1371 Some versions return a value, others return nothing. Some are
1372 declared to return a value and actually return nothing. Gdb ignores
1373 anything returned. (FIXME)
1378 procfs_store_registers (regno)
1381 struct procinfo *pi;
1383 pi = current_procinfo;
1387 ioctl (pi->fd, PIOCGREG, &pi->gregset);
1389 fill_gregset (&pi->gregset, regno);
1390 ioctl (pi->fd, PIOCSREG, &pi->gregset);
1392 #if defined (FP0_REGNUM)
1394 /* Now repeat everything using the floating point register set, if the
1395 target has floating point hardware. Since we ignore the returned value,
1396 we'll never know whether it worked or not anyway. */
1400 ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
1402 fill_fpregset (&pi->fpregset, regno);
1403 ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
1405 #endif /* FP0_REGNUM */
1413 create_procinfo - initialize access to a /proc entry
1417 void create_procinfo (int pid)
1421 Allocate a procinfo structure, open the /proc file and then sets up
1422 the set of signals and faults that are to be traced.
1426 If proc_init_failed ever gets called, control returns to the command
1427 processing loop via the standard error handling code.
1432 create_procinfo (pid)
1435 struct procinfo *pi;
1437 if (find_procinfo (pid, 1))
1438 return; /* All done! It already exists */
1440 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1442 if (!open_proc_file (pid, pi, O_RDWR))
1443 proc_init_failed (pi, "can't open process file");
1445 /* Add new process to process info list */
1447 pi->next = procinfo_list;
1450 add_fd (pi); /* Add to list for poll/select */
1452 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
1453 prfillset (&pi->prrun.pr_trace);
1454 procfs_notice_signals (pid);
1455 prfillset (&pi->prrun.pr_fault);
1456 prdelset (&pi->prrun.pr_fault, FLTPAGE);
1458 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
1459 proc_init_failed (pi, "PIOCWSTOP failed");
1461 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
1462 proc_init_failed (pi, "PIOCSFAULT failed");
1469 procfs_init_inferior - initialize target vector and access to a
1474 void procfs_init_inferior (int pid)
1478 When gdb starts an inferior, this function is called in the parent
1479 process immediately after the fork. It waits for the child to stop
1480 on the return from the exec system call (the child itself takes care
1481 of ensuring that this is set up), then sets up the set of signals
1482 and faults that are to be traced.
1486 If proc_init_failed ever gets called, control returns to the command
1487 processing loop via the standard error handling code.
1492 procfs_init_inferior (pid)
1495 push_target (&procfs_ops);
1497 create_procinfo (pid);
1498 add_thread (pid); /* Setup initial thread */
1500 /* One trap to exec the shell, one to exec the program being debugged. */
1501 startup_inferior (2);
1508 procfs_notice_signals
1512 static void procfs_notice_signals (int pid);
1516 When the user changes the state of gdb's signal handling via the
1517 "handle" command, this function gets called to see if any change
1518 in the /proc interface is required. It is also called internally
1519 by other /proc interface functions to initialize the state of
1520 the traced signal set.
1522 One thing it does is that signals for which the state is "nostop",
1523 "noprint", and "pass", have their trace bits reset in the pr_trace
1524 field, so that they are no longer traced. This allows them to be
1525 delivered directly to the inferior without the debugger ever being
1530 procfs_notice_signals (pid)
1534 struct procinfo *pi;
1536 pi = find_procinfo (pid, 0);
1538 for (signo = 0; signo < NSIG; signo++)
1540 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
1541 signal_print_state (target_signal_from_host (signo)) == 0 &&
1542 signal_pass_state (target_signal_from_host (signo)) == 1)
1544 prdelset (&pi->prrun.pr_trace, signo);
1548 praddset (&pi->prrun.pr_trace, signo);
1551 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
1553 print_sys_errmsg ("PIOCSTRACE failed", errno);
1561 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1565 void proc_set_exec_trap (void)
1569 This function is called in the child process when starting up
1570 an inferior, prior to doing the exec of the actual inferior.
1571 It sets the child process's exitset to make exit from the exec
1572 system call an event of interest to stop on, and then simply
1573 returns. The child does the exec, the system call returns, and
1574 the child stops at the first instruction, ready for the gdb
1575 parent process to take control of it.
1579 We need to use all local variables since the child may be sharing
1580 it's data space with the parent, if vfork was used rather than
1583 Also note that we want to turn off the inherit-on-fork flag in
1584 the child process so that any grand-children start with all
1585 tracing flags cleared.
1589 proc_set_exec_trap ()
1593 auto char procname[32];
1596 sprintf (procname, PROC_NAME_FMT, getpid ());
1597 if ((fd = open (procname, O_RDWR)) < 0)
1600 gdb_flush (gdb_stderr);
1603 premptyset (&exitset);
1604 premptyset (&entryset);
1607 Not all systems with /proc have all the exec* syscalls with the same
1608 names. On the SGI, for example, there is no SYS_exec, but there
1609 *is* a SYS_execv. So, we try to account for that. */
1612 praddset (&exitset, SYS_exec);
1615 praddset (&exitset, SYS_execve);
1618 praddset (&exitset, SYS_execv);
1621 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1624 gdb_flush (gdb_stderr);
1628 praddset (&entryset, SYS_exit);
1630 if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
1633 gdb_flush (gdb_stderr);
1637 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1638 start with tracing flags cleared. */
1640 #if defined (PIOCRESET) /* New method */
1644 ioctl (fd, PIOCRESET, &pr_flags);
1647 #if defined (PIOCRFORK) /* Original method */
1648 ioctl (fd, PIOCRFORK, NULL);
1652 /* Turn on run-on-last-close flag so that this process will not hang
1653 if GDB goes away for some reason. */
1655 #if defined (PIOCSET) /* New method */
1659 (void) ioctl (fd, PIOCSET, &pr_flags);
1662 #if defined (PIOCSRLC) /* Original method */
1663 (void) ioctl (fd, PIOCSRLC, 0);
1672 proc_iterate_over_mappings -- call function for every mapped space
1676 int proc_iterate_over_mappings (int (*func)())
1680 Given a pointer to a function, call that function for every
1681 mapped address space, passing it an open file descriptor for
1682 the file corresponding to that mapped address space (if any)
1683 and the base address of the mapped space. Quit when we hit
1684 the end of the mappings or the function returns nonzero.
1688 proc_iterate_over_mappings (func)
1689 int (*func) PARAMS ((int, CORE_ADDR));
1694 struct prmap *prmaps;
1695 struct prmap *prmap;
1696 struct procinfo *pi;
1698 pi = current_procinfo;
1700 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1702 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1703 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1705 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1707 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
1708 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1716 #if 0 /* Currently unused */
1721 proc_base_address -- find base address for segment containing address
1725 CORE_ADDR proc_base_address (CORE_ADDR addr)
1729 Given an address of a location in the inferior, find and return
1730 the base address of the mapped segment containing that address.
1732 This is used for example, by the shared library support code,
1733 where we have the pc value for some location in the shared library
1734 where we are stopped, and need to know the base address of the
1735 segment containing that address.
1739 proc_base_address (addr)
1743 struct prmap *prmaps;
1744 struct prmap *prmap;
1745 CORE_ADDR baseaddr = 0;
1746 struct procinfo *pi;
1748 pi = current_procinfo;
1750 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1752 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1753 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1755 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1757 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1758 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1760 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1775 proc_address_to_fd -- return open fd for file mapped to address
1779 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1783 Given an address in the current inferior's address space, use the
1784 /proc interface to find an open file descriptor for the file that
1785 this address was mapped in from. Return -1 if there is no current
1786 inferior. Print a warning message if there is an inferior but
1787 the address corresponds to no file (IE a bogus address).
1792 proc_address_to_fd (pi, addr, complain)
1793 struct procinfo *pi;
1799 if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1803 print_sys_errmsg (pi->pathname, errno);
1804 warning ("can't find mapped file for address 0x%x", addr);
1811 /* Attach to process PID, then initialize for debugging it
1812 and wait for the trace-trap that results from attaching. */
1815 procfs_attach (args, from_tty)
1823 error_no_arg ("process-id to attach");
1827 if (pid == getpid()) /* Trying to masturbate? */
1828 error ("I refuse to debug myself!");
1832 exec_file = (char *) get_exec_file (0);
1835 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
1837 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
1839 gdb_flush (gdb_stdout);
1844 push_target (&procfs_ops);
1848 /* Take a program previously attached to and detaches it.
1849 The program resumes execution and will no longer stop
1850 on signals, etc. We'd better not have left any breakpoints
1851 in the program or it'll die when it hits one. For this
1852 to work, it may be necessary for the process to have been
1853 previously attached. It *might* work if the program was
1854 started via the normal ptrace (PTRACE_TRACEME). */
1857 procfs_detach (args, from_tty)
1865 char *exec_file = get_exec_file (0);
1868 printf_unfiltered ("Detaching from program: %s %s\n",
1869 exec_file, target_pid_to_str (inferior_pid));
1870 gdb_flush (gdb_stdout);
1873 siggnal = atoi (args);
1875 do_detach (siggnal);
1877 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
1880 /* Get ready to modify the registers array. On machines which store
1881 individual registers, this doesn't need to do anything. On machines
1882 which store all the registers in one fell swoop, this makes sure
1883 that registers contains all the registers from the program being
1887 procfs_prepare_to_store ()
1889 #ifdef CHILD_PREPARE_TO_STORE
1890 CHILD_PREPARE_TO_STORE ();
1894 /* Print status information about what we're accessing. */
1897 procfs_files_info (ignore)
1898 struct target_ops *ignore;
1900 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
1901 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
1906 procfs_open (arg, from_tty)
1910 error ("Use the \"run\" command to start a Unix child process.");
1917 do_attach -- attach to an already existing process
1921 int do_attach (int pid)
1925 Attach to an already existing process with the specified process
1926 id. If the process is not already stopped, query whether to
1931 The option of stopping at attach time is specific to the /proc
1932 versions of gdb. Versions using ptrace force the attachee
1933 to stop. (I have changed this version to do so, too. All you
1943 struct procinfo *pi;
1945 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1947 if (!open_proc_file (pid, pi, O_RDWR))
1950 perror_with_name (pi->pathname);
1954 /* Add new process to process info list */
1956 pi->next = procinfo_list;
1959 add_fd (pi); /* Add to list for poll/select */
1961 /* Get current status of process and if it is not already stopped,
1962 then stop it. Remember whether or not it was stopped when we first
1965 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
1967 print_sys_errmsg (pi->pathname, errno);
1968 close_proc_file (pi);
1969 error ("PIOCSTATUS failed");
1971 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1973 pi->was_stopped = 1;
1977 pi->was_stopped = 0;
1978 if (1 || query ("Process is currently running, stop it? "))
1980 /* Make it run again when we close it. */
1981 #if defined (PIOCSET) /* New method */
1985 result = ioctl (pi->fd, PIOCSET, &pr_flags);
1988 #if defined (PIOCSRLC) /* Original method */
1989 result = ioctl (pi->fd, PIOCSRLC, 0);
1994 print_sys_errmsg (pi->pathname, errno);
1995 close_proc_file (pi);
1996 error ("PIOCSRLC or PIOCSET failed");
1998 if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
2000 print_sys_errmsg (pi->pathname, errno);
2001 close_proc_file (pi);
2002 error ("PIOCSTOP failed");
2004 pi->nopass_next_sigstop = 1;
2008 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
2012 /* Remember some things about the inferior that we will, or might, change
2013 so that we can restore them when we detach. */
2015 ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
2016 ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
2017 ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
2018 ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
2019 ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
2021 /* Set up trace and fault sets, as gdb expects them. */
2023 memset (&pi->prrun, 0, sizeof (pi->prrun));
2024 prfillset (&pi->prrun.pr_trace);
2025 procfs_notice_signals (pid);
2026 prfillset (&pi->prrun.pr_fault);
2027 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2028 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
2030 print_sys_errmsg ("PIOCSFAULT failed", errno);
2032 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
2034 print_sys_errmsg ("PIOCSTRACE failed", errno);
2044 do_detach -- detach from an attached-to process
2048 void do_detach (int signal)
2052 Detach from the current attachee.
2054 If signal is non-zero, the attachee is started running again and sent
2055 the specified signal.
2057 If signal is zero and the attachee was not already stopped when we
2058 attached to it, then we make it runnable again when we detach.
2060 Otherwise, we query whether or not to make the attachee runnable
2061 again, since we may simply want to leave it in the state it was in
2064 We report any problems, but do not consider them errors, since we
2065 MUST detach even if some things don't seem to go right. This may not
2066 be the ideal situation. (FIXME).
2074 struct procinfo *pi;
2076 pi = current_procinfo;
2080 set_proc_siginfo (pi, signal);
2082 if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
2084 print_sys_errmsg (pi->pathname, errno);
2085 printf_unfiltered ("PIOCSEXIT failed.\n");
2087 if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
2089 print_sys_errmsg (pi->pathname, errno);
2090 printf_unfiltered ("PIOCSENTRY failed.\n");
2092 if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
2094 print_sys_errmsg (pi->pathname, errno);
2095 printf_unfiltered ("PIOCSTRACE failed.\n");
2097 if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
2099 print_sys_errmsg (pi->pathname, errno);
2100 printf_unfiltered ("PIOSCHOLD failed.\n");
2102 if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
2104 print_sys_errmsg (pi->pathname, errno);
2105 printf_unfiltered ("PIOCSFAULT failed.\n");
2107 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2109 print_sys_errmsg (pi->pathname, errno);
2110 printf_unfiltered ("PIOCSTATUS failed.\n");
2114 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2116 if (signal || !pi->was_stopped ||
2117 query ("Was stopped when attached, make it runnable again? "))
2119 /* Clear any fault that might have stopped it. */
2120 if (ioctl (pi->fd, PIOCCFAULT, 0))
2122 print_sys_errmsg (pi->pathname, errno);
2123 printf_unfiltered ("PIOCCFAULT failed.\n");
2126 /* Make it run again when we close it. */
2127 #if defined (PIOCSET) /* New method */
2131 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2134 #if defined (PIOCSRLC) /* Original method */
2135 result = ioctl (pi->fd, PIOCSRLC, 0);
2140 print_sys_errmsg (pi->pathname, errno);
2141 printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
2146 close_proc_file (pi);
2150 /* emulate wait() as much as possible.
2151 Wait for child to do something. Return pid of child, or -1 in case
2152 of error; store status in *OURSTATUS.
2154 Not sure why we can't
2155 just use wait(), but it seems to have problems when applied to a
2156 process being controlled with the /proc interface.
2158 We have a race problem here with no obvious solution. We need to let
2159 the inferior run until it stops on an event of interest, which means
2160 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2161 ioctl if the process is already stopped on something that is not an
2162 event of interest, or the call will hang indefinitely. Thus we first
2163 use PIOCSTATUS to see if the process is not stopped. If not, then we
2164 use PIOCWSTOP. But during the window between the two, if the process
2165 stops for any reason that is not an event of interest (such as a job
2166 control signal) then gdb will hang. One possible workaround is to set
2167 an alarm to wake up every minute of so and check to see if the process
2168 is still running, and if so, then reissue the PIOCWSTOP. But this is
2169 a real kludge, so has not been implemented. FIXME: investigate
2172 FIXME: Investigate why wait() seems to have problems with programs
2173 being control by /proc routines. */
2176 procfs_wait (pid, ourstatus)
2178 struct target_waitstatus *ourstatus;
2185 struct procinfo *pi;
2187 if (pid != -1) /* Non-specific process? */
2190 for (pi = procinfo_list; pi; pi = pi->next)
2200 for (pi = procinfo_list; pi; pi = pi->next)
2201 if (pi->pid == pid && pi->had_event)
2204 if (!pi && !checkerr)
2207 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2209 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
2216 if (errno == ENOENT)
2218 rtnval = wait (&statval);
2219 if (rtnval != inferior_pid)
2221 print_sys_errmsg (pi->pathname, errno);
2222 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
2228 print_sys_errmsg (pi->pathname, errno);
2229 error ("PIOCSTATUS or PIOCWSTOP failed.");
2233 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2235 rtnval = pi->prstatus.pr_pid;
2236 why = pi->prstatus.pr_why;
2237 what = pi->prstatus.pr_what;
2242 statval = (what << 8) | 0177;
2245 if (what != SYS_exit)
2246 error ("PR_SYSENTRY, unknown system call %d", what);
2248 pi->prrun.pr_flags = PRCFAULT;
2250 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2251 perror_with_name (pi->pathname);
2253 rtnval = wait (&statval);
2268 statval = (SIGTRAP << 8) | 0177;
2272 /* We've just detected the completion of an sproc system call. Now we need to
2273 setup a procinfo struct for this thread, and notify the thread system of the
2276 /* If sproc failed, then nothing interesting happened. Continue the process and
2277 go back to sleep. */
2279 if (pi->prstatus.pr_errno != 0)
2281 pi->prrun.pr_flags &= PRSTEP;
2282 pi->prrun.pr_flags |= PRCFAULT;
2284 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2285 perror_with_name (pi->pathname);
2290 /* At this point, the new thread is stopped at it's first instruction, and
2291 the parent is stopped at the exit from sproc. */
2293 /* Notify the caller of the arrival of a new thread. */
2294 create_procinfo (pi->prstatus.pr_rval1);
2296 rtnval = pi->prstatus.pr_rval1;
2297 statval = (SIGTRAP << 8) | 0177;
2300 #endif /* SYS_sproc */
2303 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
2307 statval = (SIGSTOP << 8) | 0177;
2310 statval = (what << 8) | 0177;
2317 statval = (SIGILL << 8) | 0177;
2321 statval = (SIGTRAP << 8) | 0177;
2326 statval = (SIGSEGV << 8) | 0177;
2331 statval = (SIGFPE << 8) | 0177;
2333 case FLTPAGE: /* Recoverable page fault */
2335 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2339 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2341 /* Stop all the other threads when any of them stops. */
2344 struct procinfo *procinfo;
2346 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2348 if (!procinfo->had_event)
2349 if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
2351 print_sys_errmsg (procinfo->pathname, errno);
2352 error ("PIOCSTOP failed");
2359 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2360 pi->prstatus.pr_flags);
2363 store_waitstatus (ourstatus, statval);
2365 if (rtnval == -1) /* No more children to wait for */
2367 fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
2368 /* Claim it exited with unknown signal. */
2369 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2370 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
2374 pi->had_event = 0; /* Indicate that we've seen this one */
2382 set_proc_siginfo - set a process's current signal info
2386 void set_proc_siginfo (struct procinfo *pip, int signo);
2390 Given a pointer to a process info struct in PIP and a signal number
2391 in SIGNO, set the process's current signal and its associated signal
2392 information. The signal will be delivered to the process immediately
2393 after execution is resumed, even if it is being held. In addition,
2394 this particular delivery will not cause another PR_SIGNALLED stop
2395 even if the signal is being traced.
2397 If we are not delivering the same signal that the prstatus siginfo
2398 struct contains information about, then synthesize a siginfo struct
2399 to match the signal we are doing to deliver, make it of the type
2400 "generated by a user process", and send this synthesized copy. When
2401 used to set the inferior's signal state, this will be required if we
2402 are not currently stopped because of a traced signal, or if we decide
2403 to continue with a different signal.
2405 Note that when continuing the inferior from a stop due to receipt
2406 of a traced signal, we either have set PRCSIG to clear the existing
2407 signal, or we have to call this function to do a PIOCSSIG with either
2408 the existing siginfo struct from pr_info, or one we have synthesized
2409 appropriately for the signal we want to deliver. Otherwise if the
2410 signal is still being traced, the inferior will immediately stop
2413 See siginfo(5) for more details.
2417 set_proc_siginfo (pip, signo)
2418 struct procinfo *pip;
2421 struct siginfo newsiginfo;
2422 struct siginfo *sip;
2424 if (signo == pip -> prstatus.pr_info.si_signo)
2426 sip = &pip -> prstatus.pr_info;
2430 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2432 sip -> si_signo = signo;
2434 sip -> si_errno = 0;
2435 sip -> si_pid = getpid ();
2436 sip -> si_uid = getuid ();
2438 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2440 print_sys_errmsg (pip -> pathname, errno);
2441 warning ("PIOCSSIG failed");
2445 /* Resume execution of process PID. If STEP is nozero, then
2446 just single step it. If SIGNAL is nonzero, restart it with that
2447 signal activated. */
2450 procfs_resume (pid, step, signo)
2453 enum target_signal signo;
2456 struct procinfo *pi, *procinfo;
2458 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
2461 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2464 /* It should not be necessary. If the user explicitly changes the value,
2465 value_assign calls write_register_bytes, which writes it. */
2466 /* It may not be absolutely necessary to specify the PC value for
2467 restarting, but to be safe we use the value that gdb considers
2468 to be current. One case where this might be necessary is if the
2469 user explicitly changes the PC value that gdb considers to be
2470 current. FIXME: Investigate if this is necessary or not. */
2472 #ifdef PRSVADDR_BROKEN
2473 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2474 place to put nPC. In fact, if you use this, nPC seems to be set to some
2475 random garbage. We have to rely on the fact that PC and nPC have been
2476 written previously via PIOCSREG during a register flush. */
2478 pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
2479 pi->prrun.pr_flags != PRSVADDR;
2483 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
2484 /* When attaching to a child process, if we forced it to stop with
2485 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2486 Upon resuming the first time after such a stop, we explicitly
2487 inhibit sending it another SIGSTOP, which would be the normal
2488 result of default signal handling. One potential drawback to
2489 this is that we will also ignore any attempt to by the user
2490 to explicitly continue after the attach with a SIGSTOP. Ultimately
2491 this problem should be dealt with by making the routines that
2492 deal with the inferior a little smarter, and possibly even allow
2493 an inferior to continue running at the same time as gdb. (FIXME?) */
2495 else if (signo == TARGET_SIGNAL_TSTP
2496 && pi->prstatus.pr_cursig == SIGTSTP
2497 && pi->prstatus.pr_action.sa_handler == SIG_DFL)
2499 /* We are about to pass the inferior a SIGTSTP whose action is
2500 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2501 (notifying the parent via wait()), and then keep going from the
2502 same place when the parent is ready for you to keep going. So
2503 under the debugger, it should do nothing (as if the program had
2504 been stopped and then later resumed. Under ptrace, this
2505 happens for us, but under /proc, the system obligingly stops
2506 the process, and wait_for_inferior would have no way of
2507 distinguishing that type of stop (which indicates that we
2508 should just start it again), with a stop due to the pr_trace
2509 field of the prrun_t struct.
2511 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2512 because the handler needs to get executed. */
2515 signal_to_pass = target_signal_to_host (signo);
2519 set_proc_siginfo (pi, signal_to_pass);
2523 pi->prrun.pr_flags |= PRCSIG;
2525 pi->nopass_next_sigstop = 0;
2528 pi->prrun.pr_flags |= PRSTEP;
2530 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2532 perror_with_name (pi->pathname);
2538 /* Continue all the other threads that haven't had an event of
2542 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2544 if (pi != procinfo && !procinfo->had_event)
2546 procinfo->prrun.pr_flags &= PRSTEP;
2547 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
2548 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2549 if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
2551 if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
2553 fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
2555 print_sys_errmsg (procinfo->pathname, errno);
2556 error ("PIOCRUN failed");
2558 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2567 procfs_fetch_registers -- fetch current registers from inferior
2571 void procfs_fetch_registers (int regno)
2575 Read the current values of the inferior's registers, both the
2576 general register set and floating point registers (if supported)
2577 and update gdb's idea of their current values.
2582 procfs_fetch_registers (regno)
2585 struct procinfo *pi;
2587 pi = current_procinfo;
2589 if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
2591 supply_gregset (&pi->gregset);
2593 #if defined (FP0_REGNUM)
2594 if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
2596 supply_fpregset (&pi->fpregset);
2605 proc_init_failed - called whenever /proc access initialization
2610 static void proc_init_failed (struct procinfo *pi, char *why)
2614 This function is called whenever initialization of access to a /proc
2615 entry fails. It prints a suitable error message, does some cleanup,
2616 and then invokes the standard error processing routine which dumps
2617 us back into the command loop.
2621 proc_init_failed (pi, why)
2622 struct procinfo *pi;
2625 print_sys_errmsg (pi->pathname, errno);
2626 kill (pi->pid, SIGKILL);
2627 close_proc_file (pi);
2636 close_proc_file - close any currently open /proc entry
2640 static void close_proc_file (struct procinfo *pip)
2644 Close any currently open /proc entry and mark the process information
2645 entry as invalid. In order to ensure that we don't try to reuse any
2646 stale information, the pid, fd, and pathnames are explicitly
2647 invalidated, which may be overkill.
2652 close_proc_file (pip)
2653 struct procinfo *pip;
2655 struct procinfo *procinfo;
2657 remove_fd (pip); /* Remove fd from poll/select list */
2661 free (pip -> pathname);
2663 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2665 if (procinfo_list == pip)
2666 procinfo_list = pip->next;
2668 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2669 if (procinfo->next == pip)
2670 procinfo->next = pip->next;
2679 open_proc_file - open a /proc entry for a given process id
2683 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2687 Given a process id and a mode, close the existing open /proc
2688 entry (if any) and open one for the new process id, in the
2689 specified mode. Once it is open, then mark the local process
2690 information structure as valid, which guarantees that the pid,
2691 fd, and pathname fields match an open /proc entry. Returns
2692 zero if the open fails, nonzero otherwise.
2694 Note that the pathname is left intact, even when the open fails,
2695 so that callers can use it to construct meaningful error messages
2696 rather than just "file open failed".
2700 open_proc_file (pid, pip, mode)
2702 struct procinfo *pip;
2706 pip -> had_event = 0;
2707 pip -> pathname = xmalloc (32);
2710 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2711 if ((pip -> fd = open (pip -> pathname, mode)) < 0)
2718 mappingflags (flags)
2721 static char asciiflags[8];
2723 strcpy (asciiflags, "-------");
2724 #if defined (MA_PHYS)
2725 if (flags & MA_PHYS) asciiflags[0] = 'd';
2727 if (flags & MA_STACK) asciiflags[1] = 's';
2728 if (flags & MA_BREAK) asciiflags[2] = 'b';
2729 if (flags & MA_SHARED) asciiflags[3] = 's';
2730 if (flags & MA_READ) asciiflags[4] = 'r';
2731 if (flags & MA_WRITE) asciiflags[5] = 'w';
2732 if (flags & MA_EXEC) asciiflags[6] = 'x';
2733 return (asciiflags);
2737 info_proc_flags (pip, summary)
2738 struct procinfo *pip;
2741 struct trans *transp;
2743 printf_filtered ("%-32s", "Process status flags:");
2746 printf_filtered ("\n\n");
2748 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2750 if (pip -> prstatus.pr_flags & transp -> value)
2754 printf_filtered ("%s ", transp -> name);
2758 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2762 printf_filtered ("\n");
2766 info_proc_stop (pip, summary)
2767 struct procinfo *pip;
2770 struct trans *transp;
2774 why = pip -> prstatus.pr_why;
2775 what = pip -> prstatus.pr_what;
2777 if (pip -> prstatus.pr_flags & PR_STOPPED)
2779 printf_filtered ("%-32s", "Reason for stopping:");
2782 printf_filtered ("\n\n");
2784 for (transp = pr_why_table; transp -> name != NULL; transp++)
2786 if (why == transp -> value)
2790 printf_filtered ("%s ", transp -> name);
2794 printf_filtered ("\t%-16s %s.\n",
2795 transp -> name, transp -> desc);
2801 /* Use the pr_why field to determine what the pr_what field means, and
2802 print more information. */
2807 /* pr_what is unused for this case */
2813 printf_filtered ("%s ", signalname (what));
2817 printf_filtered ("\t%-16s %s.\n", signalname (what),
2818 safe_strsignal (what));
2824 printf_filtered ("%s ", syscallname (what));
2828 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2829 "Entered this system call");
2835 printf_filtered ("%s ", syscallname (what));
2839 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2840 "Returned from this system call");
2846 printf_filtered ("%s ",
2847 lookupname (faults_table, what, "fault"));
2851 printf_filtered ("\t%-16s %s.\n",
2852 lookupname (faults_table, what, "fault"),
2853 lookupdesc (faults_table, what));
2857 printf_filtered ("\n");
2862 info_proc_siginfo (pip, summary)
2863 struct procinfo *pip;
2866 struct siginfo *sip;
2868 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2869 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2870 pip -> prstatus.pr_why == PR_FAULTED))
2872 printf_filtered ("%-32s", "Additional signal/fault info:");
2873 sip = &pip -> prstatus.pr_info;
2876 printf_filtered ("%s ", signalname (sip -> si_signo));
2877 if (sip -> si_errno > 0)
2879 printf_filtered ("%s ", errnoname (sip -> si_errno));
2881 if (sip -> si_code <= 0)
2883 printf_filtered ("sent by %s, uid %d ",
2884 target_pid_to_str (sip -> si_pid),
2889 printf_filtered ("%s ", sigcodename (sip));
2890 if ((sip -> si_signo == SIGILL) ||
2891 (sip -> si_signo == SIGFPE) ||
2892 (sip -> si_signo == SIGSEGV) ||
2893 (sip -> si_signo == SIGBUS))
2895 printf_filtered ("addr=%#x ", sip -> si_addr);
2897 else if ((sip -> si_signo == SIGCHLD))
2899 printf_filtered ("child %s, status %u ",
2900 target_pid_to_str (sip -> si_pid),
2903 else if ((sip -> si_signo == SIGPOLL))
2905 printf_filtered ("band %u ", sip -> si_band);
2911 printf_filtered ("\n\n");
2912 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
2913 safe_strsignal (sip -> si_signo));
2914 if (sip -> si_errno > 0)
2916 printf_filtered ("\t%-16s %s.\n",
2917 errnoname (sip -> si_errno),
2918 safe_strerror (sip -> si_errno));
2920 if (sip -> si_code <= 0)
2922 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2923 "PID of process sending signal");
2924 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2925 "UID of process sending signal");
2929 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2931 if ((sip -> si_signo == SIGILL) ||
2932 (sip -> si_signo == SIGFPE))
2934 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2935 "Address of faulting instruction");
2937 else if ((sip -> si_signo == SIGSEGV) ||
2938 (sip -> si_signo == SIGBUS))
2940 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2941 "Address of faulting memory reference");
2943 else if ((sip -> si_signo == SIGCHLD))
2945 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2946 "Child process ID");
2947 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2948 "Child process exit value or signal");
2950 else if ((sip -> si_signo == SIGPOLL))
2952 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2953 "Band event for POLL_{IN,OUT,MSG}");
2957 printf_filtered ("\n");
2962 info_proc_syscalls (pip, summary)
2963 struct procinfo *pip;
2971 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
2972 if (pip -> prstatus.pr_flags & PR_ASLEEP)
2974 int syscallnum = pip -> prstatus.pr_reg[R_D0];
2977 printf_filtered ("%-32s", "Sleeping in system call:");
2978 printf_filtered ("%s", syscallname (syscallnum));
2982 printf_filtered ("Sleeping in system call '%s'.\n",
2983 syscallname (syscallnum));
2988 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
2990 print_sys_errmsg (pip -> pathname, errno);
2991 error ("PIOCGENTRY failed");
2994 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
2996 print_sys_errmsg (pip -> pathname, errno);
2997 error ("PIOCGEXIT failed");
3000 printf_filtered ("System call tracing information:\n\n");
3002 printf_filtered ("\t%-12s %-8s %-8s\n",
3006 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
3009 if (syscall_table[syscallnum] != NULL)
3011 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
3012 printf_filtered ("%-8s ",
3013 prismember (&pip -> entryset, syscallnum)
3015 printf_filtered ("%-8s ",
3016 prismember (&pip -> exitset, syscallnum)
3018 printf_filtered ("\n");
3021 printf_filtered ("\n");
3030 static char locbuf[32];
3032 name = strsigno (signo);
3035 sprintf (locbuf, "Signal %d", signo);
3039 sprintf (locbuf, "%s (%d)", name, signo);
3049 static char locbuf[32];
3051 name = strerrno (errnum);
3054 sprintf (locbuf, "Errno %d", errnum);
3058 sprintf (locbuf, "%s (%d)", name, errnum);
3064 info_proc_signals (pip, summary)
3065 struct procinfo *pip;
3072 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
3074 print_sys_errmsg (pip -> pathname, errno);
3075 error ("PIOCGTRACE failed");
3078 printf_filtered ("Disposition of signals:\n\n");
3079 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3080 "Signal", "Trace", "Hold", "Pending", "Description");
3081 for (signo = 0; signo < NSIG; signo++)
3084 printf_filtered ("\t%-15s ", signalname (signo));
3085 printf_filtered ("%-8s ",
3086 prismember (&pip -> trace, signo)
3088 printf_filtered ("%-8s ",
3089 prismember (&pip -> prstatus.pr_sighold, signo)
3091 printf_filtered ("%-8s ",
3092 prismember (&pip -> prstatus.pr_sigpend, signo)
3094 printf_filtered (" %s\n", safe_strsignal (signo));
3096 printf_filtered ("\n");
3101 info_proc_faults (pip, summary)
3102 struct procinfo *pip;
3105 struct trans *transp;
3109 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
3111 print_sys_errmsg (pip -> pathname, errno);
3112 error ("PIOCGFAULT failed");
3115 printf_filtered ("Current traced hardware fault set:\n\n");
3116 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3118 for (transp = faults_table; transp -> name != NULL; transp++)
3121 printf_filtered ("\t%-12s ", transp -> name);
3122 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
3124 printf_filtered ("\n");
3126 printf_filtered ("\n");
3131 info_proc_mappings (pip, summary)
3132 struct procinfo *pip;
3136 struct prmap *prmaps;
3137 struct prmap *prmap;
3141 printf_filtered ("Mapped address spaces:\n\n");
3142 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3148 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
3150 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3151 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
3153 for (prmap = prmaps; prmap -> pr_size; ++prmap)
3155 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
3157 prmap -> pr_vaddr + prmap -> pr_size - 1,
3160 mappingflags (prmap -> pr_mflags));
3164 printf_filtered ("\n");
3172 info_proc -- implement the "info proc" command
3176 void info_proc (char *args, int from_tty)
3180 Implement gdb's "info proc" command by using the /proc interface
3181 to print status information about any currently running process.
3183 Examples of the use of "info proc" are:
3185 info proc (prints summary info for current inferior)
3186 info proc 123 (prints summary info for process with pid 123)
3187 info proc mappings (prints address mappings)
3188 info proc times (prints process/children times)
3189 info proc id (prints pid, ppid, gid, sid, etc)
3190 FIXME: i proc id not implemented.
3191 info proc status (prints general process state info)
3192 FIXME: i proc status not implemented.
3193 info proc signals (prints info about signal handling)
3194 info proc all (prints all info)
3199 info_proc (args, from_tty)
3204 struct procinfo *pip;
3205 struct cleanup *old_chain;
3219 old_chain = make_cleanup (null_cleanup, 0);
3221 /* Default to using the current inferior if no pid specified. Note
3222 that inferior_pid may be 0, hence we set okerr. */
3224 pip = find_procinfo (inferior_pid, 1);
3228 if ((argv = buildargv (args)) == NULL)
3232 make_cleanup (freeargv, (char *) argv);
3234 while (*argv != NULL)
3236 argsize = strlen (*argv);
3237 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
3242 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
3247 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
3252 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
3257 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
3262 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
3267 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
3272 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
3277 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
3282 else if ((pid = atoi (*argv)) > 0)
3284 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
3285 memset (pip, 0, sizeof (*pip));
3288 if (!open_proc_file (pid, pip, O_RDONLY))
3290 perror_with_name (pip -> pathname);
3293 make_cleanup (close_proc_file, pip);
3295 else if (**argv != '\000')
3297 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
3303 /* If we don't have a valid open process at this point, then we have no
3304 inferior or didn't specify a specific pid. */
3309 No process. Start debugging a program or specify an explicit process ID.");
3311 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
3313 print_sys_errmsg (pip -> pathname, errno);
3314 error ("PIOCSTATUS failed");
3317 /* Print verbose information of the requested type(s), or just a summary
3318 of the information for all types. */
3320 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
3321 if (summary || all || flags)
3323 info_proc_flags (pip, summary);
3327 info_proc_stop (pip, summary);
3329 if (summary || all || signals || faults)
3331 info_proc_siginfo (pip, summary);
3333 if (summary || all || syscalls)
3335 info_proc_syscalls (pip, summary);
3337 if (summary || all || mappings)
3339 info_proc_mappings (pip, summary);
3341 if (summary || all || signals)
3343 info_proc_signals (pip, summary);
3345 if (summary || all || faults)
3347 info_proc_faults (pip, summary);
3349 printf_filtered ("\n");
3351 /* All done, deal with closing any temporary process info structure,
3352 freeing temporary memory , etc. */
3354 do_cleanups (old_chain);
3361 procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
3365 void procfs_set_sproc_trap (void)
3369 This function sets up a trap on sproc system call exits so that we can
3370 detect the arrival of a new thread. We are called with the child
3371 stopped prior to it's first instruction.
3373 Also note that we turn on the inherit-on-fork flag in the child process
3374 so that any grand-children start with all tracing flags set.
3380 procfs_set_sproc_trap (pi)
3381 struct procinfo *pi;
3385 if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
3387 print_sys_errmsg (pi->pathname, errno);
3388 error ("PIOCGEXIT failed");
3391 praddset (&exitset, SYS_sproc);
3393 if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
3395 print_sys_errmsg (pi->pathname, errno);
3396 error ("PIOCSEXIT failed");
3399 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3400 tracing flags set. */
3402 #ifdef PIOCSET /* New method */
3406 ioctl (pi->fd, PIOCSET, &pr_flags);
3409 #ifdef PIOCSFORK /* Original method */
3410 ioctl (pi->fd, PIOCSFORK, NULL);
3414 #endif /* SYS_sproc */
3416 /* Fork an inferior process, and start debugging it with /proc. */
3419 procfs_create_inferior (exec_file, allargs, env)
3424 char *shell_file = getenv ("SHELL");
3426 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
3429 /* We will be looking down the PATH to find shell_file. If we
3430 just do this the normal way (via execlp, which operates by
3431 attempting an exec for each element of the PATH until it
3432 finds one which succeeds), then there will be an exec for
3433 each failed attempt, each of which will cause a PR_SYSEXIT
3434 stop, and we won't know how to distinguish the PR_SYSEXIT's
3435 for these failed execs with the ones for successful execs
3436 (whether the exec has succeeded is stored at that time in the
3437 carry bit or some such architecture-specific and
3438 non-ABI-specified place).
3440 So I can't think of anything better than to search the PATH
3441 now. This has several disadvantages: (1) There is a race
3442 condition; if we find a file now and it is deleted before we
3443 exec it, we lose, even if the deletion leaves a valid file
3444 further down in the PATH, (2) there is no way to know exactly
3445 what an executable (in the sense of "capable of being
3446 exec'd") file is. Using access() loses because it may lose
3447 if the caller is the superuser; failing to use it loses if
3448 there are ACLs or some such. */
3452 /* FIXME-maybe: might want "set path" command to replace putenv hack
3453 in set_in_environ. */
3454 char *path = getenv ("PATH");
3456 struct stat statbuf;
3459 path = "/bin:/usr/bin";
3461 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
3462 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
3464 p1 = strchr (p, ':');
3469 strncpy (tryname, p, len);
3470 tryname[len] = '\0';
3471 strcat (tryname, "/");
3472 strcat (tryname, shell_file);
3473 if (access (tryname, X_OK) < 0)
3475 if (stat (tryname, &statbuf) < 0)
3477 if (!S_ISREG (statbuf.st_mode))
3478 /* We certainly need to reject directories. I'm not quite
3479 as sure about FIFOs, sockets, etc., but I kind of doubt
3480 that people want to exec() these things. */
3485 /* Not found. This must be an error rather than merely passing
3486 the file to execlp(), because execlp() would try all the
3487 exec()s, causing GDB to get confused. */
3488 error ("Can't find shell %s in PATH", shell_file);
3490 shell_file = tryname;
3493 fork_inferior (exec_file, allargs, env,
3494 proc_set_exec_trap, procfs_init_inferior, shell_file);
3496 /* We are at the first instruction we care about. */
3497 /* Pedal to the metal... */
3499 /* Setup traps on exit from sproc() */
3502 procfs_set_sproc_trap (current_procinfo);
3505 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
3508 /* Clean up after the inferior dies. */
3511 procfs_mourn_inferior ()
3513 struct procinfo *pi;
3515 for (pi = procinfo_list; pi; pi = pi->next)
3516 unconditionally_kill_inferior (pi);
3518 unpush_target (&procfs_ops);
3519 generic_mourn_inferior ();
3522 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3529 struct target_ops procfs_ops = {
3530 "procfs", /* to_shortname */
3531 "Unix /proc child process", /* to_longname */
3532 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3533 procfs_open, /* to_open */
3535 procfs_attach, /* to_attach */
3536 procfs_detach, /* to_detach */
3537 procfs_resume, /* to_resume */
3538 procfs_wait, /* to_wait */
3539 procfs_fetch_registers, /* to_fetch_registers */
3540 procfs_store_registers, /* to_store_registers */
3541 procfs_prepare_to_store, /* to_prepare_to_store */
3542 procfs_xfer_memory, /* to_xfer_memory */
3543 procfs_files_info, /* to_files_info */
3544 memory_insert_breakpoint, /* to_insert_breakpoint */
3545 memory_remove_breakpoint, /* to_remove_breakpoint */
3546 terminal_init_inferior, /* to_terminal_init */
3547 terminal_inferior, /* to_terminal_inferior */
3548 terminal_ours_for_output, /* to_terminal_ours_for_output */
3549 terminal_ours, /* to_terminal_ours */
3550 child_terminal_info, /* to_terminal_info */
3551 procfs_kill_inferior, /* to_kill */
3553 0, /* to_lookup_symbol */
3554 procfs_create_inferior, /* to_create_inferior */
3555 procfs_mourn_inferior, /* to_mourn_inferior */
3556 procfs_can_run, /* to_can_run */
3557 procfs_notice_signals, /* to_notice_signals */
3558 process_stratum, /* to_stratum */
3560 1, /* to_has_all_memory */
3561 1, /* to_has_memory */
3562 1, /* to_has_stack */
3563 1, /* to_has_registers */
3564 1, /* to_has_execution */
3566 0, /* sections_end */
3567 OPS_MAGIC /* to_magic */
3571 _initialize_procfs ()
3573 add_target (&procfs_ops);
3575 add_info ("proc", info_proc,
3576 "Show process status information using /proc entry.\n\
3577 Specify process id or use current inferior by default.\n\
3578 Specify keywords for detailed information; default is summary.\n\
3579 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3580 `status', `syscalls', and `times'.\n\
3581 Unambiguous abbreviations may be used.");
3583 init_syscall_table ();