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 while (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
586 print_sys_errmsg (pi->pathname, errno);
587 error ("PIOCWSTOP failed");
600 print_sys_errmsg ("poll failed\n", errno);
601 error ("Poll failed, returned %d", num_fds);
604 for (i = 0; i < num_poll_list && num_fds > 0; i++)
606 if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
608 for (pi = procinfo_list; pi; pi = pi->next)
610 if (poll_list[i].fd == pi->fd)
612 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
614 print_sys_errmsg (pi->pathname, errno);
615 error ("PIOCSTATUS failed");
623 error ("procfs_wait: Couldn't find procinfo for fd %d\n",
626 #endif /* LOSING_POLL */
635 lookupdesc -- translate a value to a summary desc string
639 static char *lookupdesc (struct trans *transp, unsigned int val);
643 Given a pointer to a translation table and a value to be translated,
644 lookup the desc string and return it.
648 lookupdesc (transp, val)
649 struct trans *transp;
654 for (desc = NULL; transp -> name != NULL; transp++)
656 if (transp -> value == val)
658 desc = transp -> desc;
663 /* Didn't find a translation for the specified value, set a default one. */
676 lookupname -- translate a value to symbolic name
680 static char *lookupname (struct trans *transp, unsigned int val,
685 Given a pointer to a translation table, a value to be translated,
686 and a default prefix to return if the value can't be translated,
687 match the value with one of the translation table entries and
688 return a pointer to the symbolic name.
690 If no match is found it just returns the value as a printable string,
691 with the given prefix. The previous such value, if any, is freed
696 lookupname (transp, val, prefix)
697 struct trans *transp;
704 for (name = NULL; transp -> name != NULL; transp++)
706 if (transp -> value == val)
708 name = transp -> name;
713 /* Didn't find a translation for the specified value, build a default
714 one using the specified prefix and return it. The lifetime of
715 the value is only until the next one is needed. */
723 locbuf = xmalloc (strlen (prefix) + 16);
724 sprintf (locbuf, "%s %u", prefix, val);
736 static char locbuf[32];
738 for (scp = siginfo_table; scp -> codename != NULL; scp++)
740 if ((scp -> signo == sip -> si_signo) &&
741 (scp -> code == sip -> si_code))
743 name = scp -> codename;
749 sprintf (locbuf, "sigcode %u", sip -> si_signo);
762 for (scp = siginfo_table; scp -> codename != NULL; scp++)
764 if ((scp -> signo == sip -> si_signo) &&
765 (scp -> code == sip -> si_code))
773 desc = "Unrecognized signal or trap use";
782 syscallname - translate a system call number into a system call name
786 char *syscallname (int syscallnum)
790 Given a system call number, translate it into the printable name
791 of a system call, or into "syscall <num>" if it is an unknown
796 syscallname (syscallnum)
799 static char locbuf[32];
802 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
804 rtnval = syscall_table[syscallnum];
808 sprintf (locbuf, "syscall %u", syscallnum);
818 init_syscall_table - initialize syscall translation table
822 void init_syscall_table (void)
826 Dynamically initialize the translation table to convert system
827 call numbers into printable system call names. Done once per
828 gdb run, on initialization.
832 This is awfully ugly, but preprocessor tricks to make it prettier
833 tend to be nonportable.
837 init_syscall_table ()
839 #if defined (SYS_exit)
840 syscall_table[SYS_exit] = "exit";
842 #if defined (SYS_fork)
843 syscall_table[SYS_fork] = "fork";
845 #if defined (SYS_read)
846 syscall_table[SYS_read] = "read";
848 #if defined (SYS_write)
849 syscall_table[SYS_write] = "write";
851 #if defined (SYS_open)
852 syscall_table[SYS_open] = "open";
854 #if defined (SYS_close)
855 syscall_table[SYS_close] = "close";
857 #if defined (SYS_wait)
858 syscall_table[SYS_wait] = "wait";
860 #if defined (SYS_creat)
861 syscall_table[SYS_creat] = "creat";
863 #if defined (SYS_link)
864 syscall_table[SYS_link] = "link";
866 #if defined (SYS_unlink)
867 syscall_table[SYS_unlink] = "unlink";
869 #if defined (SYS_exec)
870 syscall_table[SYS_exec] = "exec";
872 #if defined (SYS_execv)
873 syscall_table[SYS_execv] = "execv";
875 #if defined (SYS_execve)
876 syscall_table[SYS_execve] = "execve";
878 #if defined (SYS_chdir)
879 syscall_table[SYS_chdir] = "chdir";
881 #if defined (SYS_time)
882 syscall_table[SYS_time] = "time";
884 #if defined (SYS_mknod)
885 syscall_table[SYS_mknod] = "mknod";
887 #if defined (SYS_chmod)
888 syscall_table[SYS_chmod] = "chmod";
890 #if defined (SYS_chown)
891 syscall_table[SYS_chown] = "chown";
893 #if defined (SYS_brk)
894 syscall_table[SYS_brk] = "brk";
896 #if defined (SYS_stat)
897 syscall_table[SYS_stat] = "stat";
899 #if defined (SYS_lseek)
900 syscall_table[SYS_lseek] = "lseek";
902 #if defined (SYS_getpid)
903 syscall_table[SYS_getpid] = "getpid";
905 #if defined (SYS_mount)
906 syscall_table[SYS_mount] = "mount";
908 #if defined (SYS_umount)
909 syscall_table[SYS_umount] = "umount";
911 #if defined (SYS_setuid)
912 syscall_table[SYS_setuid] = "setuid";
914 #if defined (SYS_getuid)
915 syscall_table[SYS_getuid] = "getuid";
917 #if defined (SYS_stime)
918 syscall_table[SYS_stime] = "stime";
920 #if defined (SYS_ptrace)
921 syscall_table[SYS_ptrace] = "ptrace";
923 #if defined (SYS_alarm)
924 syscall_table[SYS_alarm] = "alarm";
926 #if defined (SYS_fstat)
927 syscall_table[SYS_fstat] = "fstat";
929 #if defined (SYS_pause)
930 syscall_table[SYS_pause] = "pause";
932 #if defined (SYS_utime)
933 syscall_table[SYS_utime] = "utime";
935 #if defined (SYS_stty)
936 syscall_table[SYS_stty] = "stty";
938 #if defined (SYS_gtty)
939 syscall_table[SYS_gtty] = "gtty";
941 #if defined (SYS_access)
942 syscall_table[SYS_access] = "access";
944 #if defined (SYS_nice)
945 syscall_table[SYS_nice] = "nice";
947 #if defined (SYS_statfs)
948 syscall_table[SYS_statfs] = "statfs";
950 #if defined (SYS_sync)
951 syscall_table[SYS_sync] = "sync";
953 #if defined (SYS_kill)
954 syscall_table[SYS_kill] = "kill";
956 #if defined (SYS_fstatfs)
957 syscall_table[SYS_fstatfs] = "fstatfs";
959 #if defined (SYS_pgrpsys)
960 syscall_table[SYS_pgrpsys] = "pgrpsys";
962 #if defined (SYS_xenix)
963 syscall_table[SYS_xenix] = "xenix";
965 #if defined (SYS_dup)
966 syscall_table[SYS_dup] = "dup";
968 #if defined (SYS_pipe)
969 syscall_table[SYS_pipe] = "pipe";
971 #if defined (SYS_times)
972 syscall_table[SYS_times] = "times";
974 #if defined (SYS_profil)
975 syscall_table[SYS_profil] = "profil";
977 #if defined (SYS_plock)
978 syscall_table[SYS_plock] = "plock";
980 #if defined (SYS_setgid)
981 syscall_table[SYS_setgid] = "setgid";
983 #if defined (SYS_getgid)
984 syscall_table[SYS_getgid] = "getgid";
986 #if defined (SYS_signal)
987 syscall_table[SYS_signal] = "signal";
989 #if defined (SYS_msgsys)
990 syscall_table[SYS_msgsys] = "msgsys";
992 #if defined (SYS_sys3b)
993 syscall_table[SYS_sys3b] = "sys3b";
995 #if defined (SYS_acct)
996 syscall_table[SYS_acct] = "acct";
998 #if defined (SYS_shmsys)
999 syscall_table[SYS_shmsys] = "shmsys";
1001 #if defined (SYS_semsys)
1002 syscall_table[SYS_semsys] = "semsys";
1004 #if defined (SYS_ioctl)
1005 syscall_table[SYS_ioctl] = "ioctl";
1007 #if defined (SYS_uadmin)
1008 syscall_table[SYS_uadmin] = "uadmin";
1010 #if defined (SYS_utssys)
1011 syscall_table[SYS_utssys] = "utssys";
1013 #if defined (SYS_fsync)
1014 syscall_table[SYS_fsync] = "fsync";
1016 #if defined (SYS_umask)
1017 syscall_table[SYS_umask] = "umask";
1019 #if defined (SYS_chroot)
1020 syscall_table[SYS_chroot] = "chroot";
1022 #if defined (SYS_fcntl)
1023 syscall_table[SYS_fcntl] = "fcntl";
1025 #if defined (SYS_ulimit)
1026 syscall_table[SYS_ulimit] = "ulimit";
1028 #if defined (SYS_rfsys)
1029 syscall_table[SYS_rfsys] = "rfsys";
1031 #if defined (SYS_rmdir)
1032 syscall_table[SYS_rmdir] = "rmdir";
1034 #if defined (SYS_mkdir)
1035 syscall_table[SYS_mkdir] = "mkdir";
1037 #if defined (SYS_getdents)
1038 syscall_table[SYS_getdents] = "getdents";
1040 #if defined (SYS_sysfs)
1041 syscall_table[SYS_sysfs] = "sysfs";
1043 #if defined (SYS_getmsg)
1044 syscall_table[SYS_getmsg] = "getmsg";
1046 #if defined (SYS_putmsg)
1047 syscall_table[SYS_putmsg] = "putmsg";
1049 #if defined (SYS_poll)
1050 syscall_table[SYS_poll] = "poll";
1052 #if defined (SYS_lstat)
1053 syscall_table[SYS_lstat] = "lstat";
1055 #if defined (SYS_symlink)
1056 syscall_table[SYS_symlink] = "symlink";
1058 #if defined (SYS_readlink)
1059 syscall_table[SYS_readlink] = "readlink";
1061 #if defined (SYS_setgroups)
1062 syscall_table[SYS_setgroups] = "setgroups";
1064 #if defined (SYS_getgroups)
1065 syscall_table[SYS_getgroups] = "getgroups";
1067 #if defined (SYS_fchmod)
1068 syscall_table[SYS_fchmod] = "fchmod";
1070 #if defined (SYS_fchown)
1071 syscall_table[SYS_fchown] = "fchown";
1073 #if defined (SYS_sigprocmask)
1074 syscall_table[SYS_sigprocmask] = "sigprocmask";
1076 #if defined (SYS_sigsuspend)
1077 syscall_table[SYS_sigsuspend] = "sigsuspend";
1079 #if defined (SYS_sigaltstack)
1080 syscall_table[SYS_sigaltstack] = "sigaltstack";
1082 #if defined (SYS_sigaction)
1083 syscall_table[SYS_sigaction] = "sigaction";
1085 #if defined (SYS_sigpending)
1086 syscall_table[SYS_sigpending] = "sigpending";
1088 #if defined (SYS_context)
1089 syscall_table[SYS_context] = "context";
1091 #if defined (SYS_evsys)
1092 syscall_table[SYS_evsys] = "evsys";
1094 #if defined (SYS_evtrapret)
1095 syscall_table[SYS_evtrapret] = "evtrapret";
1097 #if defined (SYS_statvfs)
1098 syscall_table[SYS_statvfs] = "statvfs";
1100 #if defined (SYS_fstatvfs)
1101 syscall_table[SYS_fstatvfs] = "fstatvfs";
1103 #if defined (SYS_nfssys)
1104 syscall_table[SYS_nfssys] = "nfssys";
1106 #if defined (SYS_waitsys)
1107 syscall_table[SYS_waitsys] = "waitsys";
1109 #if defined (SYS_sigsendsys)
1110 syscall_table[SYS_sigsendsys] = "sigsendsys";
1112 #if defined (SYS_hrtsys)
1113 syscall_table[SYS_hrtsys] = "hrtsys";
1115 #if defined (SYS_acancel)
1116 syscall_table[SYS_acancel] = "acancel";
1118 #if defined (SYS_async)
1119 syscall_table[SYS_async] = "async";
1121 #if defined (SYS_priocntlsys)
1122 syscall_table[SYS_priocntlsys] = "priocntlsys";
1124 #if defined (SYS_pathconf)
1125 syscall_table[SYS_pathconf] = "pathconf";
1127 #if defined (SYS_mincore)
1128 syscall_table[SYS_mincore] = "mincore";
1130 #if defined (SYS_mmap)
1131 syscall_table[SYS_mmap] = "mmap";
1133 #if defined (SYS_mprotect)
1134 syscall_table[SYS_mprotect] = "mprotect";
1136 #if defined (SYS_munmap)
1137 syscall_table[SYS_munmap] = "munmap";
1139 #if defined (SYS_fpathconf)
1140 syscall_table[SYS_fpathconf] = "fpathconf";
1142 #if defined (SYS_vfork)
1143 syscall_table[SYS_vfork] = "vfork";
1145 #if defined (SYS_fchdir)
1146 syscall_table[SYS_fchdir] = "fchdir";
1148 #if defined (SYS_readv)
1149 syscall_table[SYS_readv] = "readv";
1151 #if defined (SYS_writev)
1152 syscall_table[SYS_writev] = "writev";
1154 #if defined (SYS_xstat)
1155 syscall_table[SYS_xstat] = "xstat";
1157 #if defined (SYS_lxstat)
1158 syscall_table[SYS_lxstat] = "lxstat";
1160 #if defined (SYS_fxstat)
1161 syscall_table[SYS_fxstat] = "fxstat";
1163 #if defined (SYS_xmknod)
1164 syscall_table[SYS_xmknod] = "xmknod";
1166 #if defined (SYS_clocal)
1167 syscall_table[SYS_clocal] = "clocal";
1169 #if defined (SYS_setrlimit)
1170 syscall_table[SYS_setrlimit] = "setrlimit";
1172 #if defined (SYS_getrlimit)
1173 syscall_table[SYS_getrlimit] = "getrlimit";
1175 #if defined (SYS_lchown)
1176 syscall_table[SYS_lchown] = "lchown";
1178 #if defined (SYS_memcntl)
1179 syscall_table[SYS_memcntl] = "memcntl";
1181 #if defined (SYS_getpmsg)
1182 syscall_table[SYS_getpmsg] = "getpmsg";
1184 #if defined (SYS_putpmsg)
1185 syscall_table[SYS_putpmsg] = "putpmsg";
1187 #if defined (SYS_rename)
1188 syscall_table[SYS_rename] = "rename";
1190 #if defined (SYS_uname)
1191 syscall_table[SYS_uname] = "uname";
1193 #if defined (SYS_setegid)
1194 syscall_table[SYS_setegid] = "setegid";
1196 #if defined (SYS_sysconfig)
1197 syscall_table[SYS_sysconfig] = "sysconfig";
1199 #if defined (SYS_adjtime)
1200 syscall_table[SYS_adjtime] = "adjtime";
1202 #if defined (SYS_systeminfo)
1203 syscall_table[SYS_systeminfo] = "systeminfo";
1205 #if defined (SYS_seteuid)
1206 syscall_table[SYS_seteuid] = "seteuid";
1208 #if defined (SYS_sproc)
1209 syscall_table[SYS_sproc] = "sproc";
1217 procfs_kill_inferior - kill any currently inferior
1221 void procfs_kill_inferior (void)
1225 Kill any current inferior.
1229 Kills even attached inferiors. Presumably the user has already
1230 been prompted that the inferior is an attached one rather than
1231 one started by gdb. (FIXME?)
1236 procfs_kill_inferior ()
1238 target_mourn_inferior ();
1245 unconditionally_kill_inferior - terminate the inferior
1249 static void unconditionally_kill_inferior (struct procinfo *)
1253 Kill the specified inferior.
1257 A possibly useful enhancement would be to first try sending
1258 the inferior a terminate signal, politely asking it to commit
1259 suicide, before we murder it (we could call that
1260 politely_kill_inferior()).
1265 unconditionally_kill_inferior (pi)
1266 struct procinfo *pi;
1271 ppid = pi->prstatus.pr_ppid;
1274 ioctl (pi->fd, PIOCKILL, &signo);
1275 close_proc_file (pi);
1277 /* Only wait() for our direct children. Our grandchildren zombies are killed
1278 by the death of their parents. */
1280 if (ppid == getpid())
1288 procfs_xfer_memory -- copy data to or from inferior memory space
1292 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1293 int dowrite, struct target_ops target)
1297 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1298 from/to debugger memory starting at MYADDR. Copy from inferior
1299 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1301 Returns the length copied, which is either the LEN argument or
1302 zero. This xfer function does not do partial moves, since procfs_ops
1303 doesn't allow memory operations to cross below us in the target stack
1308 The /proc interface makes this an almost trivial task.
1312 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1317 struct target_ops *target; /* ignored */
1320 struct procinfo *pi;
1322 pi = current_procinfo;
1324 if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
1328 nbytes = write (pi->fd, myaddr, len);
1332 nbytes = read (pi->fd, myaddr, len);
1346 procfs_store_registers -- copy register values back to inferior
1350 void procfs_store_registers (int regno)
1354 Store our current register values back into the inferior. If
1355 REGNO is -1 then store all the register, otherwise store just
1356 the value specified by REGNO.
1360 If we are storing only a single register, we first have to get all
1361 the current values from the process, overwrite the desired register
1362 in the gregset with the one we want from gdb's registers, and then
1363 send the whole set back to the process. For writing all the
1364 registers, all we have to do is generate the gregset and send it to
1367 Also note that the process has to be stopped on an event of interest
1368 for this to work, which basically means that it has to have been
1369 run under the control of one of the other /proc ioctl calls and not
1370 ptrace. Since we don't use ptrace anyway, we don't worry about this
1371 fine point, but it is worth noting for future reference.
1373 Gdb is confused about what this function is supposed to return.
1374 Some versions return a value, others return nothing. Some are
1375 declared to return a value and actually return nothing. Gdb ignores
1376 anything returned. (FIXME)
1381 procfs_store_registers (regno)
1384 struct procinfo *pi;
1386 pi = current_procinfo;
1390 ioctl (pi->fd, PIOCGREG, &pi->gregset);
1392 fill_gregset (&pi->gregset, regno);
1393 ioctl (pi->fd, PIOCSREG, &pi->gregset);
1395 #if defined (FP0_REGNUM)
1397 /* Now repeat everything using the floating point register set, if the
1398 target has floating point hardware. Since we ignore the returned value,
1399 we'll never know whether it worked or not anyway. */
1403 ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
1405 fill_fpregset (&pi->fpregset, regno);
1406 ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
1408 #endif /* FP0_REGNUM */
1416 create_procinfo - initialize access to a /proc entry
1420 void create_procinfo (int pid)
1424 Allocate a procinfo structure, open the /proc file and then sets up
1425 the set of signals and faults that are to be traced.
1429 If proc_init_failed ever gets called, control returns to the command
1430 processing loop via the standard error handling code.
1435 create_procinfo (pid)
1438 struct procinfo *pi;
1440 if (find_procinfo (pid, 1))
1441 return; /* All done! It already exists */
1443 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1445 if (!open_proc_file (pid, pi, O_RDWR))
1446 proc_init_failed (pi, "can't open process file");
1448 /* Add new process to process info list */
1450 pi->next = procinfo_list;
1453 add_fd (pi); /* Add to list for poll/select */
1455 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
1456 prfillset (&pi->prrun.pr_trace);
1457 procfs_notice_signals (pid);
1458 prfillset (&pi->prrun.pr_fault);
1459 prdelset (&pi->prrun.pr_fault, FLTPAGE);
1461 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
1462 proc_init_failed (pi, "PIOCWSTOP failed");
1464 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
1465 proc_init_failed (pi, "PIOCSFAULT failed");
1472 procfs_init_inferior - initialize target vector and access to a
1477 void procfs_init_inferior (int pid)
1481 When gdb starts an inferior, this function is called in the parent
1482 process immediately after the fork. It waits for the child to stop
1483 on the return from the exec system call (the child itself takes care
1484 of ensuring that this is set up), then sets up the set of signals
1485 and faults that are to be traced.
1489 If proc_init_failed ever gets called, control returns to the command
1490 processing loop via the standard error handling code.
1495 procfs_init_inferior (pid)
1498 push_target (&procfs_ops);
1500 create_procinfo (pid);
1501 add_thread (pid); /* Setup initial thread */
1503 /* One trap to exec the shell, one to exec the program being debugged. */
1504 startup_inferior (2);
1511 procfs_notice_signals
1515 static void procfs_notice_signals (int pid);
1519 When the user changes the state of gdb's signal handling via the
1520 "handle" command, this function gets called to see if any change
1521 in the /proc interface is required. It is also called internally
1522 by other /proc interface functions to initialize the state of
1523 the traced signal set.
1525 One thing it does is that signals for which the state is "nostop",
1526 "noprint", and "pass", have their trace bits reset in the pr_trace
1527 field, so that they are no longer traced. This allows them to be
1528 delivered directly to the inferior without the debugger ever being
1533 procfs_notice_signals (pid)
1537 struct procinfo *pi;
1539 pi = find_procinfo (pid, 0);
1541 for (signo = 0; signo < NSIG; signo++)
1543 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
1544 signal_print_state (target_signal_from_host (signo)) == 0 &&
1545 signal_pass_state (target_signal_from_host (signo)) == 1)
1547 prdelset (&pi->prrun.pr_trace, signo);
1551 praddset (&pi->prrun.pr_trace, signo);
1554 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
1556 print_sys_errmsg ("PIOCSTRACE failed", errno);
1564 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1568 void proc_set_exec_trap (void)
1572 This function is called in the child process when starting up
1573 an inferior, prior to doing the exec of the actual inferior.
1574 It sets the child process's exitset to make exit from the exec
1575 system call an event of interest to stop on, and then simply
1576 returns. The child does the exec, the system call returns, and
1577 the child stops at the first instruction, ready for the gdb
1578 parent process to take control of it.
1582 We need to use all local variables since the child may be sharing
1583 it's data space with the parent, if vfork was used rather than
1586 Also note that we want to turn off the inherit-on-fork flag in
1587 the child process so that any grand-children start with all
1588 tracing flags cleared.
1592 proc_set_exec_trap ()
1596 auto char procname[32];
1599 sprintf (procname, PROC_NAME_FMT, getpid ());
1600 if ((fd = open (procname, O_RDWR)) < 0)
1603 gdb_flush (gdb_stderr);
1606 premptyset (&exitset);
1607 premptyset (&entryset);
1610 Not all systems with /proc have all the exec* syscalls with the same
1611 names. On the SGI, for example, there is no SYS_exec, but there
1612 *is* a SYS_execv. So, we try to account for that. */
1615 praddset (&exitset, SYS_exec);
1618 praddset (&exitset, SYS_execve);
1621 praddset (&exitset, SYS_execv);
1624 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1627 gdb_flush (gdb_stderr);
1631 praddset (&entryset, SYS_exit);
1633 if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
1636 gdb_flush (gdb_stderr);
1640 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1641 start with tracing flags cleared. */
1643 #if defined (PIOCRESET) /* New method */
1647 ioctl (fd, PIOCRESET, &pr_flags);
1650 #if defined (PIOCRFORK) /* Original method */
1651 ioctl (fd, PIOCRFORK, NULL);
1655 /* Turn on run-on-last-close flag so that this process will not hang
1656 if GDB goes away for some reason. */
1658 #if defined (PIOCSET) /* New method */
1662 (void) ioctl (fd, PIOCSET, &pr_flags);
1665 #if defined (PIOCSRLC) /* Original method */
1666 (void) ioctl (fd, PIOCSRLC, 0);
1675 proc_iterate_over_mappings -- call function for every mapped space
1679 int proc_iterate_over_mappings (int (*func)())
1683 Given a pointer to a function, call that function for every
1684 mapped address space, passing it an open file descriptor for
1685 the file corresponding to that mapped address space (if any)
1686 and the base address of the mapped space. Quit when we hit
1687 the end of the mappings or the function returns nonzero.
1691 proc_iterate_over_mappings (func)
1692 int (*func) PARAMS ((int, CORE_ADDR));
1697 struct prmap *prmaps;
1698 struct prmap *prmap;
1699 struct procinfo *pi;
1701 pi = current_procinfo;
1703 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1705 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1706 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1708 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1710 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
1711 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1719 #if 0 /* Currently unused */
1724 proc_base_address -- find base address for segment containing address
1728 CORE_ADDR proc_base_address (CORE_ADDR addr)
1732 Given an address of a location in the inferior, find and return
1733 the base address of the mapped segment containing that address.
1735 This is used for example, by the shared library support code,
1736 where we have the pc value for some location in the shared library
1737 where we are stopped, and need to know the base address of the
1738 segment containing that address.
1742 proc_base_address (addr)
1746 struct prmap *prmaps;
1747 struct prmap *prmap;
1748 CORE_ADDR baseaddr = 0;
1749 struct procinfo *pi;
1751 pi = current_procinfo;
1753 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1755 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1756 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1758 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1760 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1761 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1763 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1778 proc_address_to_fd -- return open fd for file mapped to address
1782 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1786 Given an address in the current inferior's address space, use the
1787 /proc interface to find an open file descriptor for the file that
1788 this address was mapped in from. Return -1 if there is no current
1789 inferior. Print a warning message if there is an inferior but
1790 the address corresponds to no file (IE a bogus address).
1795 proc_address_to_fd (pi, addr, complain)
1796 struct procinfo *pi;
1802 if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1806 print_sys_errmsg (pi->pathname, errno);
1807 warning ("can't find mapped file for address 0x%x", addr);
1814 /* Attach to process PID, then initialize for debugging it
1815 and wait for the trace-trap that results from attaching. */
1818 procfs_attach (args, from_tty)
1826 error_no_arg ("process-id to attach");
1830 if (pid == getpid()) /* Trying to masturbate? */
1831 error ("I refuse to debug myself!");
1835 exec_file = (char *) get_exec_file (0);
1838 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
1840 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
1842 gdb_flush (gdb_stdout);
1847 push_target (&procfs_ops);
1851 /* Take a program previously attached to and detaches it.
1852 The program resumes execution and will no longer stop
1853 on signals, etc. We'd better not have left any breakpoints
1854 in the program or it'll die when it hits one. For this
1855 to work, it may be necessary for the process to have been
1856 previously attached. It *might* work if the program was
1857 started via the normal ptrace (PTRACE_TRACEME). */
1860 procfs_detach (args, from_tty)
1868 char *exec_file = get_exec_file (0);
1871 printf_unfiltered ("Detaching from program: %s %s\n",
1872 exec_file, target_pid_to_str (inferior_pid));
1873 gdb_flush (gdb_stdout);
1876 siggnal = atoi (args);
1878 do_detach (siggnal);
1880 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
1883 /* Get ready to modify the registers array. On machines which store
1884 individual registers, this doesn't need to do anything. On machines
1885 which store all the registers in one fell swoop, this makes sure
1886 that registers contains all the registers from the program being
1890 procfs_prepare_to_store ()
1892 #ifdef CHILD_PREPARE_TO_STORE
1893 CHILD_PREPARE_TO_STORE ();
1897 /* Print status information about what we're accessing. */
1900 procfs_files_info (ignore)
1901 struct target_ops *ignore;
1903 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
1904 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
1909 procfs_open (arg, from_tty)
1913 error ("Use the \"run\" command to start a Unix child process.");
1920 do_attach -- attach to an already existing process
1924 int do_attach (int pid)
1928 Attach to an already existing process with the specified process
1929 id. If the process is not already stopped, query whether to
1934 The option of stopping at attach time is specific to the /proc
1935 versions of gdb. Versions using ptrace force the attachee
1936 to stop. (I have changed this version to do so, too. All you
1937 have to do is "continue" to make it go on. -- gnu@cygnus.com)
1946 struct procinfo *pi;
1948 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1950 if (!open_proc_file (pid, pi, O_RDWR))
1953 perror_with_name (pi->pathname);
1957 /* Add new process to process info list */
1959 pi->next = procinfo_list;
1962 add_fd (pi); /* Add to list for poll/select */
1964 /* Get current status of process and if it is not already stopped,
1965 then stop it. Remember whether or not it was stopped when we first
1968 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
1970 print_sys_errmsg (pi->pathname, errno);
1971 close_proc_file (pi);
1972 error ("PIOCSTATUS failed");
1974 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1976 pi->was_stopped = 1;
1980 pi->was_stopped = 0;
1981 if (1 || query ("Process is currently running, stop it? "))
1983 /* Make it run again when we close it. */
1984 #if defined (PIOCSET) /* New method */
1988 result = ioctl (pi->fd, PIOCSET, &pr_flags);
1991 #if defined (PIOCSRLC) /* Original method */
1992 result = ioctl (pi->fd, PIOCSRLC, 0);
1997 print_sys_errmsg (pi->pathname, errno);
1998 close_proc_file (pi);
1999 error ("PIOCSRLC or PIOCSET failed");
2001 if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
2003 print_sys_errmsg (pi->pathname, errno);
2004 close_proc_file (pi);
2005 error ("PIOCSTOP failed");
2007 pi->nopass_next_sigstop = 1;
2011 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
2015 /* Remember some things about the inferior that we will, or might, change
2016 so that we can restore them when we detach. */
2018 ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
2019 ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
2020 ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
2021 ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
2022 ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
2024 /* Set up trace and fault sets, as gdb expects them. */
2026 memset (&pi->prrun, 0, sizeof (pi->prrun));
2027 prfillset (&pi->prrun.pr_trace);
2028 procfs_notice_signals (pid);
2029 prfillset (&pi->prrun.pr_fault);
2030 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2031 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
2033 print_sys_errmsg ("PIOCSFAULT failed", errno);
2035 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
2037 print_sys_errmsg ("PIOCSTRACE failed", errno);
2047 do_detach -- detach from an attached-to process
2051 void do_detach (int signal)
2055 Detach from the current attachee.
2057 If signal is non-zero, the attachee is started running again and sent
2058 the specified signal.
2060 If signal is zero and the attachee was not already stopped when we
2061 attached to it, then we make it runnable again when we detach.
2063 Otherwise, we query whether or not to make the attachee runnable
2064 again, since we may simply want to leave it in the state it was in
2067 We report any problems, but do not consider them errors, since we
2068 MUST detach even if some things don't seem to go right. This may not
2069 be the ideal situation. (FIXME).
2077 struct procinfo *pi;
2079 pi = current_procinfo;
2083 set_proc_siginfo (pi, signal);
2085 if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
2087 print_sys_errmsg (pi->pathname, errno);
2088 printf_unfiltered ("PIOCSEXIT failed.\n");
2090 if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
2092 print_sys_errmsg (pi->pathname, errno);
2093 printf_unfiltered ("PIOCSENTRY failed.\n");
2095 if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
2097 print_sys_errmsg (pi->pathname, errno);
2098 printf_unfiltered ("PIOCSTRACE failed.\n");
2100 if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
2102 print_sys_errmsg (pi->pathname, errno);
2103 printf_unfiltered ("PIOSCHOLD failed.\n");
2105 if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
2107 print_sys_errmsg (pi->pathname, errno);
2108 printf_unfiltered ("PIOCSFAULT failed.\n");
2110 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2112 print_sys_errmsg (pi->pathname, errno);
2113 printf_unfiltered ("PIOCSTATUS failed.\n");
2117 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2119 if (signal || !pi->was_stopped ||
2120 query ("Was stopped when attached, make it runnable again? "))
2122 /* Clear any fault that might have stopped it. */
2123 if (ioctl (pi->fd, PIOCCFAULT, 0))
2125 print_sys_errmsg (pi->pathname, errno);
2126 printf_unfiltered ("PIOCCFAULT failed.\n");
2129 /* Make it run again when we close it. */
2130 #if defined (PIOCSET) /* New method */
2134 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2137 #if defined (PIOCSRLC) /* Original method */
2138 result = ioctl (pi->fd, PIOCSRLC, 0);
2143 print_sys_errmsg (pi->pathname, errno);
2144 printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
2149 close_proc_file (pi);
2153 /* emulate wait() as much as possible.
2154 Wait for child to do something. Return pid of child, or -1 in case
2155 of error; store status in *OURSTATUS.
2157 Not sure why we can't
2158 just use wait(), but it seems to have problems when applied to a
2159 process being controlled with the /proc interface.
2161 We have a race problem here with no obvious solution. We need to let
2162 the inferior run until it stops on an event of interest, which means
2163 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2164 ioctl if the process is already stopped on something that is not an
2165 event of interest, or the call will hang indefinitely. Thus we first
2166 use PIOCSTATUS to see if the process is not stopped. If not, then we
2167 use PIOCWSTOP. But during the window between the two, if the process
2168 stops for any reason that is not an event of interest (such as a job
2169 control signal) then gdb will hang. One possible workaround is to set
2170 an alarm to wake up every minute of so and check to see if the process
2171 is still running, and if so, then reissue the PIOCWSTOP. But this is
2172 a real kludge, so has not been implemented. FIXME: investigate
2175 FIXME: Investigate why wait() seems to have problems with programs
2176 being control by /proc routines. */
2179 procfs_wait (pid, ourstatus)
2181 struct target_waitstatus *ourstatus;
2188 struct procinfo *pi;
2190 if (pid != -1) /* Non-specific process? */
2193 for (pi = procinfo_list; pi; pi = pi->next)
2203 for (pi = procinfo_list; pi; pi = pi->next)
2204 if (pi->pid == pid && pi->had_event)
2207 if (!pi && !checkerr)
2210 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2212 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
2219 if (errno == ENOENT)
2221 rtnval = wait (&statval);
2222 if (rtnval != inferior_pid)
2224 print_sys_errmsg (pi->pathname, errno);
2225 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
2231 print_sys_errmsg (pi->pathname, errno);
2232 error ("PIOCSTATUS or PIOCWSTOP failed.");
2236 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2238 rtnval = pi->prstatus.pr_pid;
2239 why = pi->prstatus.pr_why;
2240 what = pi->prstatus.pr_what;
2245 statval = (what << 8) | 0177;
2248 if (what != SYS_exit)
2249 error ("PR_SYSENTRY, unknown system call %d", what);
2251 pi->prrun.pr_flags = PRCFAULT;
2253 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2254 perror_with_name (pi->pathname);
2256 rtnval = wait (&statval);
2271 statval = (SIGTRAP << 8) | 0177;
2275 /* We've just detected the completion of an sproc system call. Now we need to
2276 setup a procinfo struct for this thread, and notify the thread system of the
2279 /* If sproc failed, then nothing interesting happened. Continue the process and
2280 go back to sleep. */
2282 if (pi->prstatus.pr_errno != 0)
2284 pi->prrun.pr_flags &= PRSTEP;
2285 pi->prrun.pr_flags |= PRCFAULT;
2287 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2288 perror_with_name (pi->pathname);
2293 /* At this point, the new thread is stopped at it's first instruction, and
2294 the parent is stopped at the exit from sproc. */
2296 /* Notify the caller of the arrival of a new thread. */
2297 create_procinfo (pi->prstatus.pr_rval1);
2299 rtnval = pi->prstatus.pr_rval1;
2300 statval = (SIGTRAP << 8) | 0177;
2303 #endif /* SYS_sproc */
2306 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
2310 statval = (SIGSTOP << 8) | 0177;
2313 statval = (what << 8) | 0177;
2320 statval = (SIGTRAP << 8) | 0177;
2325 statval = (SIGTRAP << 8) | 0177;
2328 #ifndef FAULTED_USE_SIGINFO
2329 /* Irix, contrary to the documentation, fills in 0 for si_signo.
2330 Solaris fills in si_signo. I'm not sure about others. */
2333 statval = (SIGILL << 8) | 0177;
2337 statval = (SIGTRAP << 8) | 0177;
2342 statval = (SIGSEGV << 8) | 0177;
2347 statval = (SIGFPE << 8) | 0177;
2349 case FLTPAGE: /* Recoverable page fault */
2350 #endif /* not FAULTED_USE_SIGINFO */
2352 /* Use the signal which the kernel assigns. This is better than
2353 trying to second-guess it from the fault. In fact, I suspect
2354 that FLTACCESS can be either SIGSEGV or SIGBUS. */
2355 statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
2360 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2362 /* Stop all the other threads when any of them stops. */
2365 struct procinfo *procinfo;
2367 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2369 if (!procinfo->had_event)
2370 if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
2372 print_sys_errmsg (procinfo->pathname, errno);
2373 error ("PIOCSTOP failed");
2380 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2381 pi->prstatus.pr_flags);
2384 store_waitstatus (ourstatus, statval);
2386 if (rtnval == -1) /* No more children to wait for */
2388 fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
2389 /* Claim it exited with unknown signal. */
2390 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2391 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
2395 pi->had_event = 0; /* Indicate that we've seen this one */
2403 set_proc_siginfo - set a process's current signal info
2407 void set_proc_siginfo (struct procinfo *pip, int signo);
2411 Given a pointer to a process info struct in PIP and a signal number
2412 in SIGNO, set the process's current signal and its associated signal
2413 information. The signal will be delivered to the process immediately
2414 after execution is resumed, even if it is being held. In addition,
2415 this particular delivery will not cause another PR_SIGNALLED stop
2416 even if the signal is being traced.
2418 If we are not delivering the same signal that the prstatus siginfo
2419 struct contains information about, then synthesize a siginfo struct
2420 to match the signal we are doing to deliver, make it of the type
2421 "generated by a user process", and send this synthesized copy. When
2422 used to set the inferior's signal state, this will be required if we
2423 are not currently stopped because of a traced signal, or if we decide
2424 to continue with a different signal.
2426 Note that when continuing the inferior from a stop due to receipt
2427 of a traced signal, we either have set PRCSIG to clear the existing
2428 signal, or we have to call this function to do a PIOCSSIG with either
2429 the existing siginfo struct from pr_info, or one we have synthesized
2430 appropriately for the signal we want to deliver. Otherwise if the
2431 signal is still being traced, the inferior will immediately stop
2434 See siginfo(5) for more details.
2438 set_proc_siginfo (pip, signo)
2439 struct procinfo *pip;
2442 struct siginfo newsiginfo;
2443 struct siginfo *sip;
2445 if (signo == pip -> prstatus.pr_info.si_signo)
2447 sip = &pip -> prstatus.pr_info;
2451 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2453 sip -> si_signo = signo;
2455 sip -> si_errno = 0;
2456 sip -> si_pid = getpid ();
2457 sip -> si_uid = getuid ();
2459 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2461 print_sys_errmsg (pip -> pathname, errno);
2462 warning ("PIOCSSIG failed");
2466 /* Resume execution of process PID. If STEP is nozero, then
2467 just single step it. If SIGNAL is nonzero, restart it with that
2468 signal activated. */
2471 procfs_resume (pid, step, signo)
2474 enum target_signal signo;
2477 struct procinfo *pi, *procinfo;
2479 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
2482 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2485 /* It should not be necessary. If the user explicitly changes the value,
2486 value_assign calls write_register_bytes, which writes it. */
2487 /* It may not be absolutely necessary to specify the PC value for
2488 restarting, but to be safe we use the value that gdb considers
2489 to be current. One case where this might be necessary is if the
2490 user explicitly changes the PC value that gdb considers to be
2491 current. FIXME: Investigate if this is necessary or not. */
2493 #ifdef PRSVADDR_BROKEN
2494 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2495 place to put nPC. In fact, if you use this, nPC seems to be set to some
2496 random garbage. We have to rely on the fact that PC and nPC have been
2497 written previously via PIOCSREG during a register flush. */
2499 pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
2500 pi->prrun.pr_flags != PRSVADDR;
2504 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
2505 /* When attaching to a child process, if we forced it to stop with
2506 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2507 Upon resuming the first time after such a stop, we explicitly
2508 inhibit sending it another SIGSTOP, which would be the normal
2509 result of default signal handling. One potential drawback to
2510 this is that we will also ignore any attempt to by the user
2511 to explicitly continue after the attach with a SIGSTOP. Ultimately
2512 this problem should be dealt with by making the routines that
2513 deal with the inferior a little smarter, and possibly even allow
2514 an inferior to continue running at the same time as gdb. (FIXME?) */
2516 else if (signo == TARGET_SIGNAL_TSTP
2517 && pi->prstatus.pr_cursig == SIGTSTP
2518 && pi->prstatus.pr_action.sa_handler == SIG_DFL)
2520 /* We are about to pass the inferior a SIGTSTP whose action is
2521 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2522 (notifying the parent via wait()), and then keep going from the
2523 same place when the parent is ready for you to keep going. So
2524 under the debugger, it should do nothing (as if the program had
2525 been stopped and then later resumed. Under ptrace, this
2526 happens for us, but under /proc, the system obligingly stops
2527 the process, and wait_for_inferior would have no way of
2528 distinguishing that type of stop (which indicates that we
2529 should just start it again), with a stop due to the pr_trace
2530 field of the prrun_t struct.
2532 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2533 because the handler needs to get executed. */
2536 signal_to_pass = target_signal_to_host (signo);
2540 set_proc_siginfo (pi, signal_to_pass);
2544 pi->prrun.pr_flags |= PRCSIG;
2546 pi->nopass_next_sigstop = 0;
2549 pi->prrun.pr_flags |= PRSTEP;
2551 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2553 perror_with_name (pi->pathname);
2559 /* Continue all the other threads that haven't had an event of
2563 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2565 if (pi != procinfo && !procinfo->had_event)
2567 procinfo->prrun.pr_flags &= PRSTEP;
2568 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
2569 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2570 if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
2572 if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
2574 fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
2576 print_sys_errmsg (procinfo->pathname, errno);
2577 error ("PIOCRUN failed");
2579 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2588 procfs_fetch_registers -- fetch current registers from inferior
2592 void procfs_fetch_registers (int regno)
2596 Read the current values of the inferior's registers, both the
2597 general register set and floating point registers (if supported)
2598 and update gdb's idea of their current values.
2603 procfs_fetch_registers (regno)
2606 struct procinfo *pi;
2608 pi = current_procinfo;
2610 if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
2612 supply_gregset (&pi->gregset);
2614 #if defined (FP0_REGNUM)
2615 if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
2617 supply_fpregset (&pi->fpregset);
2626 proc_init_failed - called whenever /proc access initialization
2631 static void proc_init_failed (struct procinfo *pi, char *why)
2635 This function is called whenever initialization of access to a /proc
2636 entry fails. It prints a suitable error message, does some cleanup,
2637 and then invokes the standard error processing routine which dumps
2638 us back into the command loop.
2642 proc_init_failed (pi, why)
2643 struct procinfo *pi;
2646 print_sys_errmsg (pi->pathname, errno);
2647 kill (pi->pid, SIGKILL);
2648 close_proc_file (pi);
2657 close_proc_file - close any currently open /proc entry
2661 static void close_proc_file (struct procinfo *pip)
2665 Close any currently open /proc entry and mark the process information
2666 entry as invalid. In order to ensure that we don't try to reuse any
2667 stale information, the pid, fd, and pathnames are explicitly
2668 invalidated, which may be overkill.
2673 close_proc_file (pip)
2674 struct procinfo *pip;
2676 struct procinfo *procinfo;
2678 remove_fd (pip); /* Remove fd from poll/select list */
2682 free (pip -> pathname);
2684 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2686 if (procinfo_list == pip)
2687 procinfo_list = pip->next;
2689 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2690 if (procinfo->next == pip)
2691 procinfo->next = pip->next;
2700 open_proc_file - open a /proc entry for a given process id
2704 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2708 Given a process id and a mode, close the existing open /proc
2709 entry (if any) and open one for the new process id, in the
2710 specified mode. Once it is open, then mark the local process
2711 information structure as valid, which guarantees that the pid,
2712 fd, and pathname fields match an open /proc entry. Returns
2713 zero if the open fails, nonzero otherwise.
2715 Note that the pathname is left intact, even when the open fails,
2716 so that callers can use it to construct meaningful error messages
2717 rather than just "file open failed".
2721 open_proc_file (pid, pip, mode)
2723 struct procinfo *pip;
2727 pip -> had_event = 0;
2728 pip -> pathname = xmalloc (32);
2731 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2732 if ((pip -> fd = open (pip -> pathname, mode)) < 0)
2739 mappingflags (flags)
2742 static char asciiflags[8];
2744 strcpy (asciiflags, "-------");
2745 #if defined (MA_PHYS)
2746 if (flags & MA_PHYS) asciiflags[0] = 'd';
2748 if (flags & MA_STACK) asciiflags[1] = 's';
2749 if (flags & MA_BREAK) asciiflags[2] = 'b';
2750 if (flags & MA_SHARED) asciiflags[3] = 's';
2751 if (flags & MA_READ) asciiflags[4] = 'r';
2752 if (flags & MA_WRITE) asciiflags[5] = 'w';
2753 if (flags & MA_EXEC) asciiflags[6] = 'x';
2754 return (asciiflags);
2758 info_proc_flags (pip, summary)
2759 struct procinfo *pip;
2762 struct trans *transp;
2764 printf_filtered ("%-32s", "Process status flags:");
2767 printf_filtered ("\n\n");
2769 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2771 if (pip -> prstatus.pr_flags & transp -> value)
2775 printf_filtered ("%s ", transp -> name);
2779 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2783 printf_filtered ("\n");
2787 info_proc_stop (pip, summary)
2788 struct procinfo *pip;
2791 struct trans *transp;
2795 why = pip -> prstatus.pr_why;
2796 what = pip -> prstatus.pr_what;
2798 if (pip -> prstatus.pr_flags & PR_STOPPED)
2800 printf_filtered ("%-32s", "Reason for stopping:");
2803 printf_filtered ("\n\n");
2805 for (transp = pr_why_table; transp -> name != NULL; transp++)
2807 if (why == transp -> value)
2811 printf_filtered ("%s ", transp -> name);
2815 printf_filtered ("\t%-16s %s.\n",
2816 transp -> name, transp -> desc);
2822 /* Use the pr_why field to determine what the pr_what field means, and
2823 print more information. */
2828 /* pr_what is unused for this case */
2834 printf_filtered ("%s ", signalname (what));
2838 printf_filtered ("\t%-16s %s.\n", signalname (what),
2839 safe_strsignal (what));
2845 printf_filtered ("%s ", syscallname (what));
2849 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2850 "Entered this system call");
2856 printf_filtered ("%s ", syscallname (what));
2860 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2861 "Returned from this system call");
2867 printf_filtered ("%s ",
2868 lookupname (faults_table, what, "fault"));
2872 printf_filtered ("\t%-16s %s.\n",
2873 lookupname (faults_table, what, "fault"),
2874 lookupdesc (faults_table, what));
2878 printf_filtered ("\n");
2883 info_proc_siginfo (pip, summary)
2884 struct procinfo *pip;
2887 struct siginfo *sip;
2889 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2890 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2891 pip -> prstatus.pr_why == PR_FAULTED))
2893 printf_filtered ("%-32s", "Additional signal/fault info:");
2894 sip = &pip -> prstatus.pr_info;
2897 printf_filtered ("%s ", signalname (sip -> si_signo));
2898 if (sip -> si_errno > 0)
2900 printf_filtered ("%s ", errnoname (sip -> si_errno));
2902 if (sip -> si_code <= 0)
2904 printf_filtered ("sent by %s, uid %d ",
2905 target_pid_to_str (sip -> si_pid),
2910 printf_filtered ("%s ", sigcodename (sip));
2911 if ((sip -> si_signo == SIGILL) ||
2912 (sip -> si_signo == SIGFPE) ||
2913 (sip -> si_signo == SIGSEGV) ||
2914 (sip -> si_signo == SIGBUS))
2916 printf_filtered ("addr=%#x ", sip -> si_addr);
2918 else if ((sip -> si_signo == SIGCHLD))
2920 printf_filtered ("child %s, status %u ",
2921 target_pid_to_str (sip -> si_pid),
2924 else if ((sip -> si_signo == SIGPOLL))
2926 printf_filtered ("band %u ", sip -> si_band);
2932 printf_filtered ("\n\n");
2933 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
2934 safe_strsignal (sip -> si_signo));
2935 if (sip -> si_errno > 0)
2937 printf_filtered ("\t%-16s %s.\n",
2938 errnoname (sip -> si_errno),
2939 safe_strerror (sip -> si_errno));
2941 if (sip -> si_code <= 0)
2943 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2944 "PID of process sending signal");
2945 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2946 "UID of process sending signal");
2950 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2952 if ((sip -> si_signo == SIGILL) ||
2953 (sip -> si_signo == SIGFPE))
2955 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2956 "Address of faulting instruction");
2958 else if ((sip -> si_signo == SIGSEGV) ||
2959 (sip -> si_signo == SIGBUS))
2961 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2962 "Address of faulting memory reference");
2964 else if ((sip -> si_signo == SIGCHLD))
2966 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
2967 "Child process ID");
2968 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2969 "Child process exit value or signal");
2971 else if ((sip -> si_signo == SIGPOLL))
2973 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2974 "Band event for POLL_{IN,OUT,MSG}");
2978 printf_filtered ("\n");
2983 info_proc_syscalls (pip, summary)
2984 struct procinfo *pip;
2992 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
2993 if (pip -> prstatus.pr_flags & PR_ASLEEP)
2995 int syscallnum = pip -> prstatus.pr_reg[R_D0];
2998 printf_filtered ("%-32s", "Sleeping in system call:");
2999 printf_filtered ("%s", syscallname (syscallnum));
3003 printf_filtered ("Sleeping in system call '%s'.\n",
3004 syscallname (syscallnum));
3009 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
3011 print_sys_errmsg (pip -> pathname, errno);
3012 error ("PIOCGENTRY failed");
3015 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
3017 print_sys_errmsg (pip -> pathname, errno);
3018 error ("PIOCGEXIT failed");
3021 printf_filtered ("System call tracing information:\n\n");
3023 printf_filtered ("\t%-12s %-8s %-8s\n",
3027 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
3030 if (syscall_table[syscallnum] != NULL)
3032 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
3033 printf_filtered ("%-8s ",
3034 prismember (&pip -> entryset, syscallnum)
3036 printf_filtered ("%-8s ",
3037 prismember (&pip -> exitset, syscallnum)
3039 printf_filtered ("\n");
3042 printf_filtered ("\n");
3051 static char locbuf[32];
3053 name = strsigno (signo);
3056 sprintf (locbuf, "Signal %d", signo);
3060 sprintf (locbuf, "%s (%d)", name, signo);
3070 static char locbuf[32];
3072 name = strerrno (errnum);
3075 sprintf (locbuf, "Errno %d", errnum);
3079 sprintf (locbuf, "%s (%d)", name, errnum);
3085 info_proc_signals (pip, summary)
3086 struct procinfo *pip;
3093 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
3095 print_sys_errmsg (pip -> pathname, errno);
3096 error ("PIOCGTRACE failed");
3099 printf_filtered ("Disposition of signals:\n\n");
3100 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3101 "Signal", "Trace", "Hold", "Pending", "Description");
3102 for (signo = 0; signo < NSIG; signo++)
3105 printf_filtered ("\t%-15s ", signalname (signo));
3106 printf_filtered ("%-8s ",
3107 prismember (&pip -> trace, signo)
3109 printf_filtered ("%-8s ",
3110 prismember (&pip -> prstatus.pr_sighold, signo)
3112 printf_filtered ("%-8s ",
3113 prismember (&pip -> prstatus.pr_sigpend, signo)
3115 printf_filtered (" %s\n", safe_strsignal (signo));
3117 printf_filtered ("\n");
3122 info_proc_faults (pip, summary)
3123 struct procinfo *pip;
3126 struct trans *transp;
3130 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
3132 print_sys_errmsg (pip -> pathname, errno);
3133 error ("PIOCGFAULT failed");
3136 printf_filtered ("Current traced hardware fault set:\n\n");
3137 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3139 for (transp = faults_table; transp -> name != NULL; transp++)
3142 printf_filtered ("\t%-12s ", transp -> name);
3143 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
3145 printf_filtered ("\n");
3147 printf_filtered ("\n");
3152 info_proc_mappings (pip, summary)
3153 struct procinfo *pip;
3157 struct prmap *prmaps;
3158 struct prmap *prmap;
3162 printf_filtered ("Mapped address spaces:\n\n");
3163 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3169 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
3171 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3172 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
3174 for (prmap = prmaps; prmap -> pr_size; ++prmap)
3176 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
3178 prmap -> pr_vaddr + prmap -> pr_size - 1,
3181 mappingflags (prmap -> pr_mflags));
3185 printf_filtered ("\n");
3193 info_proc -- implement the "info proc" command
3197 void info_proc (char *args, int from_tty)
3201 Implement gdb's "info proc" command by using the /proc interface
3202 to print status information about any currently running process.
3204 Examples of the use of "info proc" are:
3206 info proc (prints summary info for current inferior)
3207 info proc 123 (prints summary info for process with pid 123)
3208 info proc mappings (prints address mappings)
3209 info proc times (prints process/children times)
3210 info proc id (prints pid, ppid, gid, sid, etc)
3211 FIXME: i proc id not implemented.
3212 info proc status (prints general process state info)
3213 FIXME: i proc status not implemented.
3214 info proc signals (prints info about signal handling)
3215 info proc all (prints all info)
3220 info_proc (args, from_tty)
3225 struct procinfo *pip;
3226 struct cleanup *old_chain;
3240 old_chain = make_cleanup (null_cleanup, 0);
3242 /* Default to using the current inferior if no pid specified. Note
3243 that inferior_pid may be 0, hence we set okerr. */
3245 pip = find_procinfo (inferior_pid, 1);
3249 if ((argv = buildargv (args)) == NULL)
3253 make_cleanup (freeargv, (char *) argv);
3255 while (*argv != NULL)
3257 argsize = strlen (*argv);
3258 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
3263 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
3268 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
3273 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
3278 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
3283 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
3288 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
3293 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
3298 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
3303 else if ((pid = atoi (*argv)) > 0)
3305 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
3306 memset (pip, 0, sizeof (*pip));
3309 if (!open_proc_file (pid, pip, O_RDONLY))
3311 perror_with_name (pip -> pathname);
3314 make_cleanup (close_proc_file, pip);
3316 else if (**argv != '\000')
3318 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
3324 /* If we don't have a valid open process at this point, then we have no
3325 inferior or didn't specify a specific pid. */
3330 No process. Start debugging a program or specify an explicit process ID.");
3332 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
3334 print_sys_errmsg (pip -> pathname, errno);
3335 error ("PIOCSTATUS failed");
3338 /* Print verbose information of the requested type(s), or just a summary
3339 of the information for all types. */
3341 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
3342 if (summary || all || flags)
3344 info_proc_flags (pip, summary);
3348 info_proc_stop (pip, summary);
3350 if (summary || all || signals || faults)
3352 info_proc_siginfo (pip, summary);
3354 if (summary || all || syscalls)
3356 info_proc_syscalls (pip, summary);
3358 if (summary || all || mappings)
3360 info_proc_mappings (pip, summary);
3362 if (summary || all || signals)
3364 info_proc_signals (pip, summary);
3366 if (summary || all || faults)
3368 info_proc_faults (pip, summary);
3370 printf_filtered ("\n");
3372 /* All done, deal with closing any temporary process info structure,
3373 freeing temporary memory , etc. */
3375 do_cleanups (old_chain);
3382 procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
3386 void procfs_set_sproc_trap (void)
3390 This function sets up a trap on sproc system call exits so that we can
3391 detect the arrival of a new thread. We are called with the child
3392 stopped prior to it's first instruction.
3394 Also note that we turn on the inherit-on-fork flag in the child process
3395 so that any grand-children start with all tracing flags set.
3401 procfs_set_sproc_trap (pi)
3402 struct procinfo *pi;
3406 if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
3408 print_sys_errmsg (pi->pathname, errno);
3409 error ("PIOCGEXIT failed");
3412 praddset (&exitset, SYS_sproc);
3414 if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
3416 print_sys_errmsg (pi->pathname, errno);
3417 error ("PIOCSEXIT failed");
3420 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3421 tracing flags set. */
3423 #ifdef PIOCSET /* New method */
3427 ioctl (pi->fd, PIOCSET, &pr_flags);
3430 #ifdef PIOCSFORK /* Original method */
3431 ioctl (pi->fd, PIOCSFORK, NULL);
3435 #endif /* SYS_sproc */
3437 /* Fork an inferior process, and start debugging it with /proc. */
3440 procfs_create_inferior (exec_file, allargs, env)
3445 char *shell_file = getenv ("SHELL");
3447 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
3450 /* We will be looking down the PATH to find shell_file. If we
3451 just do this the normal way (via execlp, which operates by
3452 attempting an exec for each element of the PATH until it
3453 finds one which succeeds), then there will be an exec for
3454 each failed attempt, each of which will cause a PR_SYSEXIT
3455 stop, and we won't know how to distinguish the PR_SYSEXIT's
3456 for these failed execs with the ones for successful execs
3457 (whether the exec has succeeded is stored at that time in the
3458 carry bit or some such architecture-specific and
3459 non-ABI-specified place).
3461 So I can't think of anything better than to search the PATH
3462 now. This has several disadvantages: (1) There is a race
3463 condition; if we find a file now and it is deleted before we
3464 exec it, we lose, even if the deletion leaves a valid file
3465 further down in the PATH, (2) there is no way to know exactly
3466 what an executable (in the sense of "capable of being
3467 exec'd") file is. Using access() loses because it may lose
3468 if the caller is the superuser; failing to use it loses if
3469 there are ACLs or some such. */
3473 /* FIXME-maybe: might want "set path" command so user can change what
3474 path is used from within GDB. */
3475 char *path = getenv ("PATH");
3477 struct stat statbuf;
3480 path = "/bin:/usr/bin";
3482 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
3483 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
3485 p1 = strchr (p, ':');
3490 strncpy (tryname, p, len);
3491 tryname[len] = '\0';
3492 strcat (tryname, "/");
3493 strcat (tryname, shell_file);
3494 if (access (tryname, X_OK) < 0)
3496 if (stat (tryname, &statbuf) < 0)
3498 if (!S_ISREG (statbuf.st_mode))
3499 /* We certainly need to reject directories. I'm not quite
3500 as sure about FIFOs, sockets, etc., but I kind of doubt
3501 that people want to exec() these things. */
3506 /* Not found. This must be an error rather than merely passing
3507 the file to execlp(), because execlp() would try all the
3508 exec()s, causing GDB to get confused. */
3509 error ("Can't find shell %s in PATH", shell_file);
3511 shell_file = tryname;
3514 fork_inferior (exec_file, allargs, env,
3515 proc_set_exec_trap, procfs_init_inferior, shell_file);
3517 /* We are at the first instruction we care about. */
3518 /* Pedal to the metal... */
3520 /* Setup traps on exit from sproc() */
3523 procfs_set_sproc_trap (current_procinfo);
3526 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
3529 /* Clean up after the inferior dies. */
3532 procfs_mourn_inferior ()
3534 struct procinfo *pi;
3536 for (pi = procinfo_list; pi; pi = pi->next)
3537 unconditionally_kill_inferior (pi);
3539 unpush_target (&procfs_ops);
3540 generic_mourn_inferior ();
3543 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3549 #ifdef TARGET_CAN_USE_HARDWARE_WATCHPOINT
3551 /* Insert a watchpoint */
3553 procfs_set_watchpoint(pid, addr, len, rw)
3559 struct procinfo *pi;
3562 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3563 wpt.pr_vaddr = (caddr_t)addr;
3565 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
3566 if (ioctl (pi->fd, PIOCSWATCH, &wpt) < 0)
3570 /* Currently it sometimes happens that the same watchpoint gets
3571 deleted twice - don't die in this case (FIXME please) */
3572 if (errno == ESRCH && len == 0)
3574 print_sys_errmsg (pi->pathname, errno);
3575 error ("PIOCSWATCH failed");
3581 procfs_stopped_by_watchpoint(pid)
3584 struct procinfo *pi;
3588 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3589 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3591 why = pi->prstatus.pr_why;
3592 what = pi->prstatus.pr_what;
3593 if (why == PR_FAULTED
3594 #if defined (FLTWATCH) && defined (FLTKWATCH)
3595 && (what == FLTWATCH) || (what == FLTKWATCH)
3598 && (what == FLTWATCH)
3601 && (what == FLTKWATCH)
3612 struct target_ops procfs_ops = {
3613 "procfs", /* to_shortname */
3614 "Unix /proc child process", /* to_longname */
3615 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3616 procfs_open, /* to_open */
3618 procfs_attach, /* to_attach */
3619 procfs_detach, /* to_detach */
3620 procfs_resume, /* to_resume */
3621 procfs_wait, /* to_wait */
3622 procfs_fetch_registers, /* to_fetch_registers */
3623 procfs_store_registers, /* to_store_registers */
3624 procfs_prepare_to_store, /* to_prepare_to_store */
3625 procfs_xfer_memory, /* to_xfer_memory */
3626 procfs_files_info, /* to_files_info */
3627 memory_insert_breakpoint, /* to_insert_breakpoint */
3628 memory_remove_breakpoint, /* to_remove_breakpoint */
3629 terminal_init_inferior, /* to_terminal_init */
3630 terminal_inferior, /* to_terminal_inferior */
3631 terminal_ours_for_output, /* to_terminal_ours_for_output */
3632 terminal_ours, /* to_terminal_ours */
3633 child_terminal_info, /* to_terminal_info */
3634 procfs_kill_inferior, /* to_kill */
3636 0, /* to_lookup_symbol */
3637 procfs_create_inferior, /* to_create_inferior */
3638 procfs_mourn_inferior, /* to_mourn_inferior */
3639 procfs_can_run, /* to_can_run */
3640 procfs_notice_signals, /* to_notice_signals */
3641 process_stratum, /* to_stratum */
3643 1, /* to_has_all_memory */
3644 1, /* to_has_memory */
3645 1, /* to_has_stack */
3646 1, /* to_has_registers */
3647 1, /* to_has_execution */
3649 0, /* sections_end */
3650 OPS_MAGIC /* to_magic */
3654 _initialize_procfs ()
3656 add_target (&procfs_ops);
3658 add_info ("proc", info_proc,
3659 "Show process status information using /proc entry.\n\
3660 Specify process id or use current inferior by default.\n\
3661 Specify keywords for detailed information; default is summary.\n\
3662 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3663 `status', `syscalls', and `times'.\n\
3664 Unambiguous abbreviations may be used.");
3666 init_syscall_table ();