1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992, 1993, 1994, 1995 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/fault.h>
40 #include <sys/syscall.h>
41 #include <sys/procfs.h>
56 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
59 #define PROC_NAME_FMT "/proc/%05d"
62 extern struct target_ops procfs_ops; /* Forward declaration */
64 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
65 CORE_ADDR kernel_u_addr;
68 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
70 #define si_pid _data._proc.pid
72 #define si_uid _data._proc._pdata._kill.uid
73 #endif /* BROKEN_SIGINFO_H */
75 /* All access to the inferior, either one started by gdb or one that has
76 been attached to, is controlled by an instance of a procinfo structure,
77 defined below. Since gdb currently only handles one inferior at a time,
78 the procinfo structure for the inferior is statically allocated and
79 only one exists at any given time. There is a separate procinfo
80 structure for use by the "info proc" command, so that we can print
81 useful information about any random process without interfering with
82 the inferior's procinfo information. */
85 struct procinfo *next;
86 int pid; /* Process ID of inferior */
87 int fd; /* File descriptor for /proc entry */
88 char *pathname; /* Pathname to /proc entry */
89 int had_event; /* poll/select says something happened */
90 int was_stopped; /* Nonzero if was stopped prior to attach */
91 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
92 prrun_t prrun; /* Control state when it is run */
93 prstatus_t prstatus; /* Current process status info */
94 gregset_t gregset; /* General register set */
95 fpregset_t fpregset; /* Floating point register set */
96 fltset_t fltset; /* Current traced hardware fault set */
97 sigset_t trace; /* Current traced signal set */
98 sysset_t exitset; /* Current traced system call exit set */
99 sysset_t entryset; /* Current traced system call entry set */
100 fltset_t saved_fltset; /* Saved traced hardware fault set */
101 sigset_t saved_trace; /* Saved traced signal set */
102 sigset_t saved_sighold; /* Saved held signal set */
103 sysset_t saved_exitset; /* Saved traced system call exit set */
104 sysset_t saved_entryset; /* Saved traced system call entry set */
107 /* List of inferior process information */
108 static struct procinfo *procinfo_list = NULL;
110 static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
112 static int num_poll_list = 0; /* Number of entries in poll_list */
114 static int last_resume_pid = -1; /* Last pid used with procfs_resume */
116 /* Much of the information used in the /proc interface, particularly for
117 printing status information, is kept as tables of structures of the
118 following form. These tables can be used to map numeric values to
119 their symbolic names and to a string that describes their specific use. */
122 int value; /* The numeric value */
123 char *name; /* The equivalent symbolic value */
124 char *desc; /* Short description of value */
127 /* Translate bits in the pr_flags member of the prstatus structure, into the
128 names and desc information. */
130 static struct trans pr_flag_table[] =
132 #if defined (PR_STOPPED)
133 { PR_STOPPED, "PR_STOPPED", "Process is stopped" },
135 #if defined (PR_ISTOP)
136 { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" },
138 #if defined (PR_DSTOP)
139 { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" },
141 #if defined (PR_ASLEEP)
142 { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" },
144 #if defined (PR_FORK)
145 { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" },
148 { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" },
150 #if defined (PR_PTRACE)
151 { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" },
153 #if defined (PR_PCINVAL)
154 { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" },
156 #if defined (PR_ISSYS)
157 { PR_ISSYS, "PR_ISSYS", "Is a system process" },
159 #if defined (PR_STEP)
160 { PR_STEP, "PR_STEP", "Process has single step pending" },
163 { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" },
165 #if defined (PR_ASYNC)
166 { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" },
168 #if defined (PR_PCOMPAT)
169 { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
174 /* Translate values in the pr_why field of the prstatus struct. */
176 static struct trans pr_why_table[] =
178 #if defined (PR_REQUESTED)
179 { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
181 #if defined (PR_SIGNALLED)
182 { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
184 #if defined (PR_FAULTED)
185 { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
187 #if defined (PR_SYSENTRY)
188 { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
190 #if defined (PR_SYSEXIT)
191 { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
193 #if defined (PR_JOBCONTROL)
194 { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
196 #if defined (PR_SUSPENDED)
197 { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
202 /* Hardware fault translation table. */
204 static struct trans faults_table[] =
207 { FLTILL, "FLTILL", "Illegal instruction" },
209 #if defined (FLTPRIV)
210 { FLTPRIV, "FLTPRIV", "Privileged instruction" },
213 { FLTBPT, "FLTBPT", "Breakpoint trap" },
215 #if defined (FLTTRACE)
216 { FLTTRACE, "FLTTRACE", "Trace trap" },
218 #if defined (FLTACCESS)
219 { FLTACCESS, "FLTACCESS", "Memory access fault" },
221 #if defined (FLTBOUNDS)
222 { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" },
224 #if defined (FLTIOVF)
225 { FLTIOVF, "FLTIOVF", "Integer overflow" },
227 #if defined (FLTIZDIV)
228 { FLTIZDIV, "FLTIZDIV", "Integer zero divide" },
231 { FLTFPE, "FLTFPE", "Floating-point exception" },
233 #if defined (FLTSTACK)
234 { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" },
236 #if defined (FLTPAGE)
237 { FLTPAGE, "FLTPAGE", "Recoverable page fault" },
242 /* Translation table for signal generation information. See UNIX System
243 V Release 4 Programmer's Reference Manual, siginfo(5). */
245 static struct sigcode {
250 } siginfo_table[] = {
251 #if defined (SIGILL) && defined (ILL_ILLOPC)
252 { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" },
254 #if defined (SIGILL) && defined (ILL_ILLOPN)
255 { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", },
257 #if defined (SIGILL) && defined (ILL_ILLADR)
258 { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" },
260 #if defined (SIGILL) && defined (ILL_ILLTRP)
261 { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" },
263 #if defined (SIGILL) && defined (ILL_PRVOPC)
264 { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" },
266 #if defined (SIGILL) && defined (ILL_PRVREG)
267 { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" },
269 #if defined (SIGILL) && defined (ILL_COPROC)
270 { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" },
272 #if defined (SIGILL) && defined (ILL_BADSTK)
273 { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" },
275 #if defined (SIGFPE) && defined (FPE_INTDIV)
276 { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" },
278 #if defined (SIGFPE) && defined (FPE_INTOVF)
279 { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" },
281 #if defined (SIGFPE) && defined (FPE_FLTDIV)
282 { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" },
284 #if defined (SIGFPE) && defined (FPE_FLTOVF)
285 { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" },
287 #if defined (SIGFPE) && defined (FPE_FLTUND)
288 { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" },
290 #if defined (SIGFPE) && defined (FPE_FLTRES)
291 { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" },
293 #if defined (SIGFPE) && defined (FPE_FLTINV)
294 { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" },
296 #if defined (SIGFPE) && defined (FPE_FLTSUB)
297 { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" },
299 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
300 { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" },
302 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
303 { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" },
305 #if defined (SIGBUS) && defined (BUS_ADRALN)
306 { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" },
308 #if defined (SIGBUS) && defined (BUS_ADRERR)
309 { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" },
311 #if defined (SIGBUS) && defined (BUS_OBJERR)
312 { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" },
314 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
315 { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" },
317 #if defined (SIGTRAP) && defined (TRAP_TRACE)
318 { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" },
320 #if defined (SIGCLD) && defined (CLD_EXITED)
321 { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" },
323 #if defined (SIGCLD) && defined (CLD_KILLED)
324 { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" },
326 #if defined (SIGCLD) && defined (CLD_DUMPED)
327 { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" },
329 #if defined (SIGCLD) && defined (CLD_TRAPPED)
330 { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" },
332 #if defined (SIGCLD) && defined (CLD_STOPPED)
333 { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" },
335 #if defined (SIGCLD) && defined (CLD_CONTINUED)
336 { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" },
338 #if defined (SIGPOLL) && defined (POLL_IN)
339 { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" },
341 #if defined (SIGPOLL) && defined (POLL_OUT)
342 { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" },
344 #if defined (SIGPOLL) && defined (POLL_MSG)
345 { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" },
347 #if defined (SIGPOLL) && defined (POLL_ERR)
348 { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" },
350 #if defined (SIGPOLL) && defined (POLL_PRI)
351 { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" },
353 #if defined (SIGPOLL) && defined (POLL_HUP)
354 { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" },
359 static char *syscall_table[MAX_SYSCALLS];
361 /* Prototypes for local functions */
363 static void set_proc_siginfo PARAMS ((struct procinfo *, int));
365 static void init_syscall_table PARAMS ((void));
367 static char *syscallname PARAMS ((int));
369 static char *signalname PARAMS ((int));
371 static char *errnoname PARAMS ((int));
373 static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
375 static int open_proc_file PARAMS ((int, struct procinfo *, int));
377 static void close_proc_file PARAMS ((struct procinfo *));
379 static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
381 static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *)) ATTR_NORETURN;
383 static void info_proc PARAMS ((char *, int));
385 static void info_proc_flags PARAMS ((struct procinfo *, int));
387 static void info_proc_stop PARAMS ((struct procinfo *, int));
389 static void info_proc_siginfo PARAMS ((struct procinfo *, int));
391 static void info_proc_syscalls PARAMS ((struct procinfo *, int));
393 static void info_proc_mappings PARAMS ((struct procinfo *, int));
395 static void info_proc_signals PARAMS ((struct procinfo *, int));
397 static void info_proc_faults PARAMS ((struct procinfo *, int));
399 static char *mappingflags PARAMS ((long));
401 static char *lookupname PARAMS ((struct trans *, unsigned int, char *));
403 static char *lookupdesc PARAMS ((struct trans *, unsigned int));
405 static int do_attach PARAMS ((int pid));
407 static void do_detach PARAMS ((int siggnal));
409 static void procfs_create_inferior PARAMS ((char *, char *, char **));
411 static void procfs_notice_signals PARAMS ((int pid));
413 static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
415 /* External function prototypes that can't be easily included in any
416 header file because the args are typedefs in system include files. */
418 extern void supply_gregset PARAMS ((gregset_t *));
420 extern void fill_gregset PARAMS ((gregset_t *, int));
422 extern void supply_fpregset PARAMS ((fpregset_t *));
424 extern void fill_fpregset PARAMS ((fpregset_t *, int));
430 find_procinfo -- convert a process id to a struct procinfo
434 static struct procinfo * find_procinfo (pid_t pid, int okfail);
438 Given a process id, look it up in the procinfo chain. Returns
439 a struct procinfo *. If can't find pid, then call error(),
440 unless okfail is set, in which case, return NULL;
443 static struct procinfo *
444 find_procinfo (pid, okfail)
448 struct procinfo *procinfo;
450 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
451 if (procinfo->pid == pid)
457 error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
464 current_procinfo -- convert inferior_pid to a struct procinfo
468 static struct procinfo * current_procinfo;
472 Looks up inferior_pid in the procinfo chain. Always returns a
473 struct procinfo *. If process can't be found, we error() out.
476 #define current_procinfo find_procinfo (inferior_pid, 0)
482 add_fd -- Add the fd to the poll/select list
486 static void add_fd (struct procinfo *);
490 Add the fd of the supplied procinfo to the list of fds used for
491 poll/select operations.
498 if (num_poll_list <= 0)
499 poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
501 poll_list = (struct pollfd *) xrealloc (poll_list,
503 * sizeof (struct pollfd));
504 poll_list[num_poll_list].fd = pi->fd;
505 poll_list[num_poll_list].events = POLLPRI;
516 for (i = 0; i < num_poll_list; i++)
518 if (poll_list[i].fd == pi->fd)
520 if (i != num_poll_list - 1)
521 memcpy (poll_list, poll_list + i + 1,
522 (num_poll_list - i - 1) * sizeof (struct pollfd));
526 if (num_poll_list == 0)
529 poll_list = (struct pollfd *) xrealloc (poll_list,
531 * sizeof (struct pollfd));
537 #define LOSING_POLL unixware_sux
539 static struct procinfo *
546 set_sigint_trap (); /* Causes SIGINT to be passed on to the
551 num_fds = poll (poll_list, num_poll_list, -1);
553 pi = current_procinfo;
555 while (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
559 /* Process exited. */
560 pi->prstatus.pr_flags = 0;
563 else if (errno != EINTR)
565 print_sys_errmsg (pi->pathname, errno);
566 error ("PIOCWSTOP failed");
572 clear_sigint_trap ();
579 print_sys_errmsg ("poll failed\n", errno);
580 error ("Poll failed, returned %d", num_fds);
583 for (i = 0; i < num_poll_list && num_fds > 0; i++)
585 if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
587 for (pi = procinfo_list; pi; pi = pi->next)
589 if (poll_list[i].fd == pi->fd)
591 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
593 print_sys_errmsg (pi->pathname, errno);
594 error ("PIOCSTATUS failed");
602 error ("procfs_wait: Couldn't find procinfo for fd %d\n",
605 #endif /* LOSING_POLL */
614 lookupdesc -- translate a value to a summary desc string
618 static char *lookupdesc (struct trans *transp, unsigned int val);
622 Given a pointer to a translation table and a value to be translated,
623 lookup the desc string and return it.
627 lookupdesc (transp, val)
628 struct trans *transp;
633 for (desc = NULL; transp -> name != NULL; transp++)
635 if (transp -> value == val)
637 desc = transp -> desc;
642 /* Didn't find a translation for the specified value, set a default one. */
655 lookupname -- translate a value to symbolic name
659 static char *lookupname (struct trans *transp, unsigned int val,
664 Given a pointer to a translation table, a value to be translated,
665 and a default prefix to return if the value can't be translated,
666 match the value with one of the translation table entries and
667 return a pointer to the symbolic name.
669 If no match is found it just returns the value as a printable string,
670 with the given prefix. The previous such value, if any, is freed
675 lookupname (transp, val, prefix)
676 struct trans *transp;
683 for (name = NULL; transp -> name != NULL; transp++)
685 if (transp -> value == val)
687 name = transp -> name;
692 /* Didn't find a translation for the specified value, build a default
693 one using the specified prefix and return it. The lifetime of
694 the value is only until the next one is needed. */
702 locbuf = xmalloc (strlen (prefix) + 16);
703 sprintf (locbuf, "%s %u", prefix, val);
715 static char locbuf[32];
717 for (scp = siginfo_table; scp -> codename != NULL; scp++)
719 if ((scp -> signo == sip -> si_signo) &&
720 (scp -> code == sip -> si_code))
722 name = scp -> codename;
728 sprintf (locbuf, "sigcode %u", sip -> si_signo);
741 for (scp = siginfo_table; scp -> codename != NULL; scp++)
743 if ((scp -> signo == sip -> si_signo) &&
744 (scp -> code == sip -> si_code))
752 desc = "Unrecognized signal or trap use";
761 syscallname - translate a system call number into a system call name
765 char *syscallname (int syscallnum)
769 Given a system call number, translate it into the printable name
770 of a system call, or into "syscall <num>" if it is an unknown
775 syscallname (syscallnum)
778 static char locbuf[32];
781 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
783 rtnval = syscall_table[syscallnum];
787 sprintf (locbuf, "syscall %u", syscallnum);
797 init_syscall_table - initialize syscall translation table
801 void init_syscall_table (void)
805 Dynamically initialize the translation table to convert system
806 call numbers into printable system call names. Done once per
807 gdb run, on initialization.
811 This is awfully ugly, but preprocessor tricks to make it prettier
812 tend to be nonportable.
816 init_syscall_table ()
818 #if defined (SYS_exit)
819 syscall_table[SYS_exit] = "exit";
821 #if defined (SYS_fork)
822 syscall_table[SYS_fork] = "fork";
824 #if defined (SYS_read)
825 syscall_table[SYS_read] = "read";
827 #if defined (SYS_write)
828 syscall_table[SYS_write] = "write";
830 #if defined (SYS_open)
831 syscall_table[SYS_open] = "open";
833 #if defined (SYS_close)
834 syscall_table[SYS_close] = "close";
836 #if defined (SYS_wait)
837 syscall_table[SYS_wait] = "wait";
839 #if defined (SYS_creat)
840 syscall_table[SYS_creat] = "creat";
842 #if defined (SYS_link)
843 syscall_table[SYS_link] = "link";
845 #if defined (SYS_unlink)
846 syscall_table[SYS_unlink] = "unlink";
848 #if defined (SYS_exec)
849 syscall_table[SYS_exec] = "exec";
851 #if defined (SYS_execv)
852 syscall_table[SYS_execv] = "execv";
854 #if defined (SYS_execve)
855 syscall_table[SYS_execve] = "execve";
857 #if defined (SYS_chdir)
858 syscall_table[SYS_chdir] = "chdir";
860 #if defined (SYS_time)
861 syscall_table[SYS_time] = "time";
863 #if defined (SYS_mknod)
864 syscall_table[SYS_mknod] = "mknod";
866 #if defined (SYS_chmod)
867 syscall_table[SYS_chmod] = "chmod";
869 #if defined (SYS_chown)
870 syscall_table[SYS_chown] = "chown";
872 #if defined (SYS_brk)
873 syscall_table[SYS_brk] = "brk";
875 #if defined (SYS_stat)
876 syscall_table[SYS_stat] = "stat";
878 #if defined (SYS_lseek)
879 syscall_table[SYS_lseek] = "lseek";
881 #if defined (SYS_getpid)
882 syscall_table[SYS_getpid] = "getpid";
884 #if defined (SYS_mount)
885 syscall_table[SYS_mount] = "mount";
887 #if defined (SYS_umount)
888 syscall_table[SYS_umount] = "umount";
890 #if defined (SYS_setuid)
891 syscall_table[SYS_setuid] = "setuid";
893 #if defined (SYS_getuid)
894 syscall_table[SYS_getuid] = "getuid";
896 #if defined (SYS_stime)
897 syscall_table[SYS_stime] = "stime";
899 #if defined (SYS_ptrace)
900 syscall_table[SYS_ptrace] = "ptrace";
902 #if defined (SYS_alarm)
903 syscall_table[SYS_alarm] = "alarm";
905 #if defined (SYS_fstat)
906 syscall_table[SYS_fstat] = "fstat";
908 #if defined (SYS_pause)
909 syscall_table[SYS_pause] = "pause";
911 #if defined (SYS_utime)
912 syscall_table[SYS_utime] = "utime";
914 #if defined (SYS_stty)
915 syscall_table[SYS_stty] = "stty";
917 #if defined (SYS_gtty)
918 syscall_table[SYS_gtty] = "gtty";
920 #if defined (SYS_access)
921 syscall_table[SYS_access] = "access";
923 #if defined (SYS_nice)
924 syscall_table[SYS_nice] = "nice";
926 #if defined (SYS_statfs)
927 syscall_table[SYS_statfs] = "statfs";
929 #if defined (SYS_sync)
930 syscall_table[SYS_sync] = "sync";
932 #if defined (SYS_kill)
933 syscall_table[SYS_kill] = "kill";
935 #if defined (SYS_fstatfs)
936 syscall_table[SYS_fstatfs] = "fstatfs";
938 #if defined (SYS_pgrpsys)
939 syscall_table[SYS_pgrpsys] = "pgrpsys";
941 #if defined (SYS_xenix)
942 syscall_table[SYS_xenix] = "xenix";
944 #if defined (SYS_dup)
945 syscall_table[SYS_dup] = "dup";
947 #if defined (SYS_pipe)
948 syscall_table[SYS_pipe] = "pipe";
950 #if defined (SYS_times)
951 syscall_table[SYS_times] = "times";
953 #if defined (SYS_profil)
954 syscall_table[SYS_profil] = "profil";
956 #if defined (SYS_plock)
957 syscall_table[SYS_plock] = "plock";
959 #if defined (SYS_setgid)
960 syscall_table[SYS_setgid] = "setgid";
962 #if defined (SYS_getgid)
963 syscall_table[SYS_getgid] = "getgid";
965 #if defined (SYS_signal)
966 syscall_table[SYS_signal] = "signal";
968 #if defined (SYS_msgsys)
969 syscall_table[SYS_msgsys] = "msgsys";
971 #if defined (SYS_sys3b)
972 syscall_table[SYS_sys3b] = "sys3b";
974 #if defined (SYS_acct)
975 syscall_table[SYS_acct] = "acct";
977 #if defined (SYS_shmsys)
978 syscall_table[SYS_shmsys] = "shmsys";
980 #if defined (SYS_semsys)
981 syscall_table[SYS_semsys] = "semsys";
983 #if defined (SYS_ioctl)
984 syscall_table[SYS_ioctl] = "ioctl";
986 #if defined (SYS_uadmin)
987 syscall_table[SYS_uadmin] = "uadmin";
989 #if defined (SYS_utssys)
990 syscall_table[SYS_utssys] = "utssys";
992 #if defined (SYS_fsync)
993 syscall_table[SYS_fsync] = "fsync";
995 #if defined (SYS_umask)
996 syscall_table[SYS_umask] = "umask";
998 #if defined (SYS_chroot)
999 syscall_table[SYS_chroot] = "chroot";
1001 #if defined (SYS_fcntl)
1002 syscall_table[SYS_fcntl] = "fcntl";
1004 #if defined (SYS_ulimit)
1005 syscall_table[SYS_ulimit] = "ulimit";
1007 #if defined (SYS_rfsys)
1008 syscall_table[SYS_rfsys] = "rfsys";
1010 #if defined (SYS_rmdir)
1011 syscall_table[SYS_rmdir] = "rmdir";
1013 #if defined (SYS_mkdir)
1014 syscall_table[SYS_mkdir] = "mkdir";
1016 #if defined (SYS_getdents)
1017 syscall_table[SYS_getdents] = "getdents";
1019 #if defined (SYS_sysfs)
1020 syscall_table[SYS_sysfs] = "sysfs";
1022 #if defined (SYS_getmsg)
1023 syscall_table[SYS_getmsg] = "getmsg";
1025 #if defined (SYS_putmsg)
1026 syscall_table[SYS_putmsg] = "putmsg";
1028 #if defined (SYS_poll)
1029 syscall_table[SYS_poll] = "poll";
1031 #if defined (SYS_lstat)
1032 syscall_table[SYS_lstat] = "lstat";
1034 #if defined (SYS_symlink)
1035 syscall_table[SYS_symlink] = "symlink";
1037 #if defined (SYS_readlink)
1038 syscall_table[SYS_readlink] = "readlink";
1040 #if defined (SYS_setgroups)
1041 syscall_table[SYS_setgroups] = "setgroups";
1043 #if defined (SYS_getgroups)
1044 syscall_table[SYS_getgroups] = "getgroups";
1046 #if defined (SYS_fchmod)
1047 syscall_table[SYS_fchmod] = "fchmod";
1049 #if defined (SYS_fchown)
1050 syscall_table[SYS_fchown] = "fchown";
1052 #if defined (SYS_sigprocmask)
1053 syscall_table[SYS_sigprocmask] = "sigprocmask";
1055 #if defined (SYS_sigsuspend)
1056 syscall_table[SYS_sigsuspend] = "sigsuspend";
1058 #if defined (SYS_sigaltstack)
1059 syscall_table[SYS_sigaltstack] = "sigaltstack";
1061 #if defined (SYS_sigaction)
1062 syscall_table[SYS_sigaction] = "sigaction";
1064 #if defined (SYS_sigpending)
1065 syscall_table[SYS_sigpending] = "sigpending";
1067 #if defined (SYS_context)
1068 syscall_table[SYS_context] = "context";
1070 #if defined (SYS_evsys)
1071 syscall_table[SYS_evsys] = "evsys";
1073 #if defined (SYS_evtrapret)
1074 syscall_table[SYS_evtrapret] = "evtrapret";
1076 #if defined (SYS_statvfs)
1077 syscall_table[SYS_statvfs] = "statvfs";
1079 #if defined (SYS_fstatvfs)
1080 syscall_table[SYS_fstatvfs] = "fstatvfs";
1082 #if defined (SYS_nfssys)
1083 syscall_table[SYS_nfssys] = "nfssys";
1085 #if defined (SYS_waitsys)
1086 syscall_table[SYS_waitsys] = "waitsys";
1088 #if defined (SYS_sigsendsys)
1089 syscall_table[SYS_sigsendsys] = "sigsendsys";
1091 #if defined (SYS_hrtsys)
1092 syscall_table[SYS_hrtsys] = "hrtsys";
1094 #if defined (SYS_acancel)
1095 syscall_table[SYS_acancel] = "acancel";
1097 #if defined (SYS_async)
1098 syscall_table[SYS_async] = "async";
1100 #if defined (SYS_priocntlsys)
1101 syscall_table[SYS_priocntlsys] = "priocntlsys";
1103 #if defined (SYS_pathconf)
1104 syscall_table[SYS_pathconf] = "pathconf";
1106 #if defined (SYS_mincore)
1107 syscall_table[SYS_mincore] = "mincore";
1109 #if defined (SYS_mmap)
1110 syscall_table[SYS_mmap] = "mmap";
1112 #if defined (SYS_mprotect)
1113 syscall_table[SYS_mprotect] = "mprotect";
1115 #if defined (SYS_munmap)
1116 syscall_table[SYS_munmap] = "munmap";
1118 #if defined (SYS_fpathconf)
1119 syscall_table[SYS_fpathconf] = "fpathconf";
1121 #if defined (SYS_vfork)
1122 syscall_table[SYS_vfork] = "vfork";
1124 #if defined (SYS_fchdir)
1125 syscall_table[SYS_fchdir] = "fchdir";
1127 #if defined (SYS_readv)
1128 syscall_table[SYS_readv] = "readv";
1130 #if defined (SYS_writev)
1131 syscall_table[SYS_writev] = "writev";
1133 #if defined (SYS_xstat)
1134 syscall_table[SYS_xstat] = "xstat";
1136 #if defined (SYS_lxstat)
1137 syscall_table[SYS_lxstat] = "lxstat";
1139 #if defined (SYS_fxstat)
1140 syscall_table[SYS_fxstat] = "fxstat";
1142 #if defined (SYS_xmknod)
1143 syscall_table[SYS_xmknod] = "xmknod";
1145 #if defined (SYS_clocal)
1146 syscall_table[SYS_clocal] = "clocal";
1148 #if defined (SYS_setrlimit)
1149 syscall_table[SYS_setrlimit] = "setrlimit";
1151 #if defined (SYS_getrlimit)
1152 syscall_table[SYS_getrlimit] = "getrlimit";
1154 #if defined (SYS_lchown)
1155 syscall_table[SYS_lchown] = "lchown";
1157 #if defined (SYS_memcntl)
1158 syscall_table[SYS_memcntl] = "memcntl";
1160 #if defined (SYS_getpmsg)
1161 syscall_table[SYS_getpmsg] = "getpmsg";
1163 #if defined (SYS_putpmsg)
1164 syscall_table[SYS_putpmsg] = "putpmsg";
1166 #if defined (SYS_rename)
1167 syscall_table[SYS_rename] = "rename";
1169 #if defined (SYS_uname)
1170 syscall_table[SYS_uname] = "uname";
1172 #if defined (SYS_setegid)
1173 syscall_table[SYS_setegid] = "setegid";
1175 #if defined (SYS_sysconfig)
1176 syscall_table[SYS_sysconfig] = "sysconfig";
1178 #if defined (SYS_adjtime)
1179 syscall_table[SYS_adjtime] = "adjtime";
1181 #if defined (SYS_systeminfo)
1182 syscall_table[SYS_systeminfo] = "systeminfo";
1184 #if defined (SYS_seteuid)
1185 syscall_table[SYS_seteuid] = "seteuid";
1187 #if defined (SYS_sproc)
1188 syscall_table[SYS_sproc] = "sproc";
1196 procfs_kill_inferior - kill any currently inferior
1200 void procfs_kill_inferior (void)
1204 Kill any current inferior.
1208 Kills even attached inferiors. Presumably the user has already
1209 been prompted that the inferior is an attached one rather than
1210 one started by gdb. (FIXME?)
1215 procfs_kill_inferior ()
1217 target_mourn_inferior ();
1224 unconditionally_kill_inferior - terminate the inferior
1228 static void unconditionally_kill_inferior (struct procinfo *)
1232 Kill the specified inferior.
1236 A possibly useful enhancement would be to first try sending
1237 the inferior a terminate signal, politely asking it to commit
1238 suicide, before we murder it (we could call that
1239 politely_kill_inferior()).
1244 unconditionally_kill_inferior (pi)
1245 struct procinfo *pi;
1250 ppid = pi->prstatus.pr_ppid;
1254 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1255 /* Alpha OSF/1 procfs needs a PIOCSSIG call with a SIGKILL signal
1256 to kill the inferior, otherwise it might remain stopped with a
1258 We do not check the result of the PIOCSSIG, the inferior might have
1261 struct siginfo newsiginfo;
1263 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
1264 newsiginfo.si_signo = signo;
1265 newsiginfo.si_code = 0;
1266 newsiginfo.si_errno = 0;
1267 newsiginfo.si_pid = getpid ();
1268 newsiginfo.si_uid = getuid ();
1269 ioctl (pi->fd, PIOCSSIG, &newsiginfo);
1272 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 struct procinfo * create_procinfo (int pid)
1424 Allocate a procinfo structure, open the /proc file and then set up the
1425 set of signals and faults that are to be traced. Returns a pointer to
1426 the new procinfo structure.
1430 If proc_init_failed ever gets called, control returns to the command
1431 processing loop via the standard error handling code.
1435 static struct procinfo *
1436 create_procinfo (pid)
1439 struct procinfo *pi;
1441 pi = find_procinfo (pid, 1);
1443 return pi; /* All done! It already exists */
1445 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1447 if (!open_proc_file (pid, pi, O_RDWR))
1448 proc_init_failed (pi, "can't open process file");
1450 /* Add new process to process info list */
1452 pi->next = procinfo_list;
1455 add_fd (pi); /* Add to list for poll/select */
1457 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
1458 prfillset (&pi->prrun.pr_trace);
1459 procfs_notice_signals (pid);
1460 prfillset (&pi->prrun.pr_fault);
1461 prdelset (&pi->prrun.pr_fault, FLTPAGE);
1463 #ifdef PROCFS_DONT_TRACE_FAULTS
1464 premptyset (&pi->prrun.pr_fault);
1467 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
1468 proc_init_failed (pi, "PIOCWSTOP failed");
1470 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
1471 proc_init_failed (pi, "PIOCSFAULT failed");
1480 procfs_init_inferior - initialize target vector and access to a
1485 void procfs_init_inferior (int pid)
1489 When gdb starts an inferior, this function is called in the parent
1490 process immediately after the fork. It waits for the child to stop
1491 on the return from the exec system call (the child itself takes care
1492 of ensuring that this is set up), then sets up the set of signals
1493 and faults that are to be traced.
1497 If proc_init_failed ever gets called, control returns to the command
1498 processing loop via the standard error handling code.
1503 procfs_init_inferior (pid)
1506 push_target (&procfs_ops);
1508 create_procinfo (pid);
1509 add_thread (pid); /* Setup initial thread */
1511 #ifdef START_INFERIOR_TRAPS_EXPECTED
1512 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
1514 /* One trap to exec the shell, one to exec the program being debugged. */
1515 startup_inferior (2);
1523 procfs_notice_signals
1527 static void procfs_notice_signals (int pid);
1531 When the user changes the state of gdb's signal handling via the
1532 "handle" command, this function gets called to see if any change
1533 in the /proc interface is required. It is also called internally
1534 by other /proc interface functions to initialize the state of
1535 the traced signal set.
1537 One thing it does is that signals for which the state is "nostop",
1538 "noprint", and "pass", have their trace bits reset in the pr_trace
1539 field, so that they are no longer traced. This allows them to be
1540 delivered directly to the inferior without the debugger ever being
1545 procfs_notice_signals (pid)
1549 struct procinfo *pi;
1551 pi = find_procinfo (pid, 0);
1553 for (signo = 0; signo < NSIG; signo++)
1555 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
1556 signal_print_state (target_signal_from_host (signo)) == 0 &&
1557 signal_pass_state (target_signal_from_host (signo)) == 1)
1559 prdelset (&pi->prrun.pr_trace, signo);
1563 praddset (&pi->prrun.pr_trace, signo);
1566 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
1568 print_sys_errmsg ("PIOCSTRACE failed", errno);
1576 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1580 void proc_set_exec_trap (void)
1584 This function is called in the child process when starting up
1585 an inferior, prior to doing the exec of the actual inferior.
1586 It sets the child process's exitset to make exit from the exec
1587 system call an event of interest to stop on, and then simply
1588 returns. The child does the exec, the system call returns, and
1589 the child stops at the first instruction, ready for the gdb
1590 parent process to take control of it.
1594 We need to use all local variables since the child may be sharing
1595 it's data space with the parent, if vfork was used rather than
1598 Also note that we want to turn off the inherit-on-fork flag in
1599 the child process so that any grand-children start with all
1600 tracing flags cleared.
1604 proc_set_exec_trap ()
1608 auto char procname[32];
1611 sprintf (procname, PROC_NAME_FMT, getpid ());
1612 if ((fd = open (procname, O_RDWR)) < 0)
1615 gdb_flush (gdb_stderr);
1618 premptyset (&exitset);
1619 premptyset (&entryset);
1622 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
1623 exits from exec system calls because of the user level loader. */
1627 if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
1630 gdb_flush (gdb_stderr);
1633 prfs_flags |= PRFS_STOPEXEC;
1634 if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
1637 gdb_flush (gdb_stderr);
1643 Not all systems with /proc have all the exec* syscalls with the same
1644 names. On the SGI, for example, there is no SYS_exec, but there
1645 *is* a SYS_execv. So, we try to account for that. */
1648 praddset (&exitset, SYS_exec);
1651 praddset (&exitset, SYS_execve);
1654 praddset (&exitset, SYS_execv);
1657 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1660 gdb_flush (gdb_stderr);
1665 praddset (&entryset, SYS_exit);
1667 if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
1670 gdb_flush (gdb_stderr);
1674 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1675 start with tracing flags cleared. */
1677 #if defined (PIOCRESET) /* New method */
1681 ioctl (fd, PIOCRESET, &pr_flags);
1684 #if defined (PIOCRFORK) /* Original method */
1685 ioctl (fd, PIOCRFORK, NULL);
1689 /* Turn on run-on-last-close flag so that this process will not hang
1690 if GDB goes away for some reason. */
1692 #if defined (PIOCSET) /* New method */
1696 (void) ioctl (fd, PIOCSET, &pr_flags);
1699 #if defined (PIOCSRLC) /* Original method */
1700 (void) ioctl (fd, PIOCSRLC, 0);
1709 proc_iterate_over_mappings -- call function for every mapped space
1713 int proc_iterate_over_mappings (int (*func)())
1717 Given a pointer to a function, call that function for every
1718 mapped address space, passing it an open file descriptor for
1719 the file corresponding to that mapped address space (if any)
1720 and the base address of the mapped space. Quit when we hit
1721 the end of the mappings or the function returns nonzero.
1725 proc_iterate_over_mappings (func)
1726 int (*func) PARAMS ((int, CORE_ADDR));
1731 struct prmap *prmaps;
1732 struct prmap *prmap;
1733 struct procinfo *pi;
1735 pi = current_procinfo;
1737 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1739 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1740 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1742 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1744 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
1745 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1753 #if 0 /* Currently unused */
1758 proc_base_address -- find base address for segment containing address
1762 CORE_ADDR proc_base_address (CORE_ADDR addr)
1766 Given an address of a location in the inferior, find and return
1767 the base address of the mapped segment containing that address.
1769 This is used for example, by the shared library support code,
1770 where we have the pc value for some location in the shared library
1771 where we are stopped, and need to know the base address of the
1772 segment containing that address.
1776 proc_base_address (addr)
1780 struct prmap *prmaps;
1781 struct prmap *prmap;
1782 CORE_ADDR baseaddr = 0;
1783 struct procinfo *pi;
1785 pi = current_procinfo;
1787 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1789 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1790 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1792 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1794 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1795 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1797 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1812 proc_address_to_fd -- return open fd for file mapped to address
1816 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1820 Given an address in the current inferior's address space, use the
1821 /proc interface to find an open file descriptor for the file that
1822 this address was mapped in from. Return -1 if there is no current
1823 inferior. Print a warning message if there is an inferior but
1824 the address corresponds to no file (IE a bogus address).
1829 proc_address_to_fd (pi, addr, complain)
1830 struct procinfo *pi;
1836 if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1840 print_sys_errmsg (pi->pathname, errno);
1841 warning ("can't find mapped file for address 0x%x", addr);
1848 /* Attach to process PID, then initialize for debugging it
1849 and wait for the trace-trap that results from attaching. */
1852 procfs_attach (args, from_tty)
1860 error_no_arg ("process-id to attach");
1864 if (pid == getpid()) /* Trying to masturbate? */
1865 error ("I refuse to debug myself!");
1869 exec_file = (char *) get_exec_file (0);
1872 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
1874 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
1876 gdb_flush (gdb_stdout);
1881 push_target (&procfs_ops);
1885 /* Take a program previously attached to and detaches it.
1886 The program resumes execution and will no longer stop
1887 on signals, etc. We'd better not have left any breakpoints
1888 in the program or it'll die when it hits one. For this
1889 to work, it may be necessary for the process to have been
1890 previously attached. It *might* work if the program was
1891 started via the normal ptrace (PTRACE_TRACEME). */
1894 procfs_detach (args, from_tty)
1902 char *exec_file = get_exec_file (0);
1905 printf_unfiltered ("Detaching from program: %s %s\n",
1906 exec_file, target_pid_to_str (inferior_pid));
1907 gdb_flush (gdb_stdout);
1910 siggnal = atoi (args);
1912 do_detach (siggnal);
1914 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
1917 /* Get ready to modify the registers array. On machines which store
1918 individual registers, this doesn't need to do anything. On machines
1919 which store all the registers in one fell swoop, this makes sure
1920 that registers contains all the registers from the program being
1924 procfs_prepare_to_store ()
1926 #ifdef CHILD_PREPARE_TO_STORE
1927 CHILD_PREPARE_TO_STORE ();
1931 /* Print status information about what we're accessing. */
1934 procfs_files_info (ignore)
1935 struct target_ops *ignore;
1937 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
1938 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
1943 procfs_open (arg, from_tty)
1947 error ("Use the \"run\" command to start a Unix child process.");
1954 do_attach -- attach to an already existing process
1958 int do_attach (int pid)
1962 Attach to an already existing process with the specified process
1963 id. If the process is not already stopped, query whether to
1968 The option of stopping at attach time is specific to the /proc
1969 versions of gdb. Versions using ptrace force the attachee
1970 to stop. (I have changed this version to do so, too. All you
1971 have to do is "continue" to make it go on. -- gnu@cygnus.com)
1980 struct procinfo *pi;
1982 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1984 if (!open_proc_file (pid, pi, O_RDWR))
1987 perror_with_name (pi->pathname);
1991 /* Add new process to process info list */
1993 pi->next = procinfo_list;
1996 add_fd (pi); /* Add to list for poll/select */
1998 /* Get current status of process and if it is not already stopped,
1999 then stop it. Remember whether or not it was stopped when we first
2002 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2004 print_sys_errmsg (pi->pathname, errno);
2005 close_proc_file (pi);
2006 error ("PIOCSTATUS failed");
2008 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2010 pi->was_stopped = 1;
2014 pi->was_stopped = 0;
2015 if (1 || query ("Process is currently running, stop it? "))
2017 /* Make it run again when we close it. */
2018 #if defined (PIOCSET) /* New method */
2022 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2025 #if defined (PIOCSRLC) /* Original method */
2026 result = ioctl (pi->fd, PIOCSRLC, 0);
2031 print_sys_errmsg (pi->pathname, errno);
2032 close_proc_file (pi);
2033 error ("PIOCSRLC or PIOCSET failed");
2035 if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
2037 print_sys_errmsg (pi->pathname, errno);
2038 close_proc_file (pi);
2039 error ("PIOCSTOP failed");
2041 pi->nopass_next_sigstop = 1;
2045 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
2049 /* Remember some things about the inferior that we will, or might, change
2050 so that we can restore them when we detach. */
2052 ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
2053 ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
2054 ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
2055 ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
2056 ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
2058 /* Set up trace and fault sets, as gdb expects them. */
2060 memset (&pi->prrun, 0, sizeof (pi->prrun));
2061 prfillset (&pi->prrun.pr_trace);
2062 procfs_notice_signals (pid);
2063 prfillset (&pi->prrun.pr_fault);
2064 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2066 #ifdef PROCFS_DONT_TRACE_FAULTS
2067 premptyset (&pi->prrun.pr_fault);
2070 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
2072 print_sys_errmsg ("PIOCSFAULT failed", errno);
2074 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
2076 print_sys_errmsg ("PIOCSTRACE failed", errno);
2086 do_detach -- detach from an attached-to process
2090 void do_detach (int signal)
2094 Detach from the current attachee.
2096 If signal is non-zero, the attachee is started running again and sent
2097 the specified signal.
2099 If signal is zero and the attachee was not already stopped when we
2100 attached to it, then we make it runnable again when we detach.
2102 Otherwise, we query whether or not to make the attachee runnable
2103 again, since we may simply want to leave it in the state it was in
2106 We report any problems, but do not consider them errors, since we
2107 MUST detach even if some things don't seem to go right. This may not
2108 be the ideal situation. (FIXME).
2116 struct procinfo *pi;
2118 pi = current_procinfo;
2122 set_proc_siginfo (pi, signal);
2124 if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
2126 print_sys_errmsg (pi->pathname, errno);
2127 printf_unfiltered ("PIOCSEXIT failed.\n");
2129 if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
2131 print_sys_errmsg (pi->pathname, errno);
2132 printf_unfiltered ("PIOCSENTRY failed.\n");
2134 if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
2136 print_sys_errmsg (pi->pathname, errno);
2137 printf_unfiltered ("PIOCSTRACE failed.\n");
2139 if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
2141 print_sys_errmsg (pi->pathname, errno);
2142 printf_unfiltered ("PIOSCHOLD failed.\n");
2144 if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
2146 print_sys_errmsg (pi->pathname, errno);
2147 printf_unfiltered ("PIOCSFAULT failed.\n");
2149 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2151 print_sys_errmsg (pi->pathname, errno);
2152 printf_unfiltered ("PIOCSTATUS failed.\n");
2156 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2158 if (signal || !pi->was_stopped ||
2159 query ("Was stopped when attached, make it runnable again? "))
2161 /* Clear any pending signal if we want to detach without
2164 set_proc_siginfo (pi, signal);
2166 /* Clear any fault that might have stopped it. */
2167 if (ioctl (pi->fd, PIOCCFAULT, 0))
2169 print_sys_errmsg (pi->pathname, errno);
2170 printf_unfiltered ("PIOCCFAULT failed.\n");
2173 /* Make it run again when we close it. */
2174 #if defined (PIOCSET) /* New method */
2178 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2181 #if defined (PIOCSRLC) /* Original method */
2182 result = ioctl (pi->fd, PIOCSRLC, 0);
2187 print_sys_errmsg (pi->pathname, errno);
2188 printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
2193 close_proc_file (pi);
2197 /* emulate wait() as much as possible.
2198 Wait for child to do something. Return pid of child, or -1 in case
2199 of error; store status in *OURSTATUS.
2201 Not sure why we can't
2202 just use wait(), but it seems to have problems when applied to a
2203 process being controlled with the /proc interface.
2205 We have a race problem here with no obvious solution. We need to let
2206 the inferior run until it stops on an event of interest, which means
2207 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2208 ioctl if the process is already stopped on something that is not an
2209 event of interest, or the call will hang indefinitely. Thus we first
2210 use PIOCSTATUS to see if the process is not stopped. If not, then we
2211 use PIOCWSTOP. But during the window between the two, if the process
2212 stops for any reason that is not an event of interest (such as a job
2213 control signal) then gdb will hang. One possible workaround is to set
2214 an alarm to wake up every minute of so and check to see if the process
2215 is still running, and if so, then reissue the PIOCWSTOP. But this is
2216 a real kludge, so has not been implemented. FIXME: investigate
2219 FIXME: Investigate why wait() seems to have problems with programs
2220 being control by /proc routines. */
2223 procfs_wait (pid, ourstatus)
2225 struct target_waitstatus *ourstatus;
2232 struct procinfo *pi;
2234 if (pid != -1) /* Non-specific process? */
2237 for (pi = procinfo_list; pi; pi = pi->next)
2249 for (pi = procinfo_list; pi; pi = pi->next)
2250 if (pi->pid == pid && pi->had_event)
2253 if (!pi && !checkerr)
2256 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2258 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
2265 if (errno == ENOENT)
2267 rtnval = wait (&statval);
2268 if (rtnval != inferior_pid)
2270 print_sys_errmsg (pi->pathname, errno);
2271 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
2277 print_sys_errmsg (pi->pathname, errno);
2278 error ("PIOCSTATUS or PIOCWSTOP failed.");
2282 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2284 rtnval = pi->prstatus.pr_pid;
2285 why = pi->prstatus.pr_why;
2286 what = pi->prstatus.pr_what;
2291 statval = (what << 8) | 0177;
2294 if (what != SYS_exit)
2295 error ("PR_SYSENTRY, unknown system call %d", what);
2297 pi->prrun.pr_flags = PRCFAULT;
2299 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2300 perror_with_name (pi->pathname);
2302 rtnval = wait (&statval);
2317 statval = (SIGTRAP << 8) | 0177;
2321 /* We've just detected the completion of an sproc system call. Now we need to
2322 setup a procinfo struct for this thread, and notify the thread system of the
2325 /* If sproc failed, then nothing interesting happened. Continue the process and
2326 go back to sleep. */
2328 if (pi->prstatus.pr_errno != 0)
2330 pi->prrun.pr_flags &= PRSTEP;
2331 pi->prrun.pr_flags |= PRCFAULT;
2333 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2334 perror_with_name (pi->pathname);
2339 /* At this point, the new thread is stopped at it's first instruction, and
2340 the parent is stopped at the exit from sproc. */
2342 /* Notify the caller of the arrival of a new thread. */
2343 create_procinfo (pi->prstatus.pr_rval1);
2345 rtnval = pi->prstatus.pr_rval1;
2346 statval = (SIGTRAP << 8) | 0177;
2353 /* At this point, we've detected the completion of a fork (or vfork) call in
2354 our child. The grandchild is also stopped because we set inherit-on-fork
2355 earlier. (Note that nobody has the grandchilds' /proc file open at this
2356 point.) We will release the grandchild from the debugger by opening it's
2357 /proc file and then closing it. Since run-on-last-close is set, the
2358 grandchild continues on its' merry way. */
2361 struct procinfo *pitemp;
2363 pitemp = create_procinfo (pi->prstatus.pr_rval1);
2365 close_proc_file (pitemp);
2367 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2368 perror_with_name (pi->pathname);
2371 #endif /* SYS_sproc */
2374 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
2378 statval = (SIGSTOP << 8) | 0177;
2381 statval = (what << 8) | 0177;
2388 statval = (SIGTRAP << 8) | 0177;
2393 statval = (SIGTRAP << 8) | 0177;
2396 #ifndef FAULTED_USE_SIGINFO
2397 /* Irix, contrary to the documentation, fills in 0 for si_signo.
2398 Solaris fills in si_signo. I'm not sure about others. */
2401 statval = (SIGILL << 8) | 0177;
2405 statval = (SIGTRAP << 8) | 0177;
2410 statval = (SIGSEGV << 8) | 0177;
2415 statval = (SIGFPE << 8) | 0177;
2417 case FLTPAGE: /* Recoverable page fault */
2418 #endif /* not FAULTED_USE_SIGINFO */
2420 /* Use the signal which the kernel assigns. This is better than
2421 trying to second-guess it from the fault. In fact, I suspect
2422 that FLTACCESS can be either SIGSEGV or SIGBUS. */
2423 statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
2428 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2430 /* Stop all the other threads when any of them stops. */
2433 struct procinfo *procinfo;
2435 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2437 if (!procinfo->had_event)
2438 if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
2440 print_sys_errmsg (procinfo->pathname, errno);
2441 error ("PIOCSTOP failed");
2448 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2449 pi->prstatus.pr_flags);
2452 store_waitstatus (ourstatus, statval);
2454 if (rtnval == -1) /* No more children to wait for */
2456 fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
2457 /* Claim it exited with unknown signal. */
2458 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2459 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
2463 pi->had_event = 0; /* Indicate that we've seen this one */
2471 set_proc_siginfo - set a process's current signal info
2475 void set_proc_siginfo (struct procinfo *pip, int signo);
2479 Given a pointer to a process info struct in PIP and a signal number
2480 in SIGNO, set the process's current signal and its associated signal
2481 information. The signal will be delivered to the process immediately
2482 after execution is resumed, even if it is being held. In addition,
2483 this particular delivery will not cause another PR_SIGNALLED stop
2484 even if the signal is being traced.
2486 If we are not delivering the same signal that the prstatus siginfo
2487 struct contains information about, then synthesize a siginfo struct
2488 to match the signal we are doing to deliver, make it of the type
2489 "generated by a user process", and send this synthesized copy. When
2490 used to set the inferior's signal state, this will be required if we
2491 are not currently stopped because of a traced signal, or if we decide
2492 to continue with a different signal.
2494 Note that when continuing the inferior from a stop due to receipt
2495 of a traced signal, we either have set PRCSIG to clear the existing
2496 signal, or we have to call this function to do a PIOCSSIG with either
2497 the existing siginfo struct from pr_info, or one we have synthesized
2498 appropriately for the signal we want to deliver. Otherwise if the
2499 signal is still being traced, the inferior will immediately stop
2502 See siginfo(5) for more details.
2506 set_proc_siginfo (pip, signo)
2507 struct procinfo *pip;
2510 struct siginfo newsiginfo;
2511 struct siginfo *sip;
2513 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
2514 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
2515 receives a PIOCSSIG with a signal identical to the current signal,
2516 it messes up the current signal. Work around the kernel bug. */
2517 if (signo == pip -> prstatus.pr_cursig)
2521 if (signo == pip -> prstatus.pr_info.si_signo)
2523 sip = &pip -> prstatus.pr_info;
2527 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2529 sip -> si_signo = signo;
2531 sip -> si_errno = 0;
2532 sip -> si_pid = getpid ();
2533 sip -> si_uid = getuid ();
2535 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2537 print_sys_errmsg (pip -> pathname, errno);
2538 warning ("PIOCSSIG failed");
2542 /* Resume execution of process PID. If STEP is nozero, then
2543 just single step it. If SIGNAL is nonzero, restart it with that
2544 signal activated. */
2547 procfs_resume (pid, step, signo)
2550 enum target_signal signo;
2553 struct procinfo *pi, *procinfo;
2555 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
2558 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2561 /* It should not be necessary. If the user explicitly changes the value,
2562 value_assign calls write_register_bytes, which writes it. */
2563 /* It may not be absolutely necessary to specify the PC value for
2564 restarting, but to be safe we use the value that gdb considers
2565 to be current. One case where this might be necessary is if the
2566 user explicitly changes the PC value that gdb considers to be
2567 current. FIXME: Investigate if this is necessary or not. */
2569 #ifdef PRSVADDR_BROKEN
2570 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2571 place to put nPC. In fact, if you use this, nPC seems to be set to some
2572 random garbage. We have to rely on the fact that PC and nPC have been
2573 written previously via PIOCSREG during a register flush. */
2575 pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
2576 pi->prrun.pr_flags != PRSVADDR;
2580 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
2581 /* When attaching to a child process, if we forced it to stop with
2582 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2583 Upon resuming the first time after such a stop, we explicitly
2584 inhibit sending it another SIGSTOP, which would be the normal
2585 result of default signal handling. One potential drawback to
2586 this is that we will also ignore any attempt to by the user
2587 to explicitly continue after the attach with a SIGSTOP. Ultimately
2588 this problem should be dealt with by making the routines that
2589 deal with the inferior a little smarter, and possibly even allow
2590 an inferior to continue running at the same time as gdb. (FIXME?) */
2592 else if (signo == TARGET_SIGNAL_TSTP
2593 && pi->prstatus.pr_cursig == SIGTSTP
2594 && pi->prstatus.pr_action.sa_handler == SIG_DFL)
2596 /* We are about to pass the inferior a SIGTSTP whose action is
2597 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2598 (notifying the parent via wait()), and then keep going from the
2599 same place when the parent is ready for you to keep going. So
2600 under the debugger, it should do nothing (as if the program had
2601 been stopped and then later resumed. Under ptrace, this
2602 happens for us, but under /proc, the system obligingly stops
2603 the process, and wait_for_inferior would have no way of
2604 distinguishing that type of stop (which indicates that we
2605 should just start it again), with a stop due to the pr_trace
2606 field of the prrun_t struct.
2608 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2609 because the handler needs to get executed. */
2612 signal_to_pass = target_signal_to_host (signo);
2616 set_proc_siginfo (pi, signal_to_pass);
2620 pi->prrun.pr_flags |= PRCSIG;
2622 pi->nopass_next_sigstop = 0;
2625 pi->prrun.pr_flags |= PRSTEP;
2627 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2629 perror_with_name (pi->pathname);
2635 /* Continue all the other threads that haven't had an event of
2639 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2641 if (pi != procinfo && !procinfo->had_event)
2643 procinfo->prrun.pr_flags &= PRSTEP;
2644 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
2645 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2646 if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
2648 if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
2650 fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
2652 print_sys_errmsg (procinfo->pathname, errno);
2653 error ("PIOCRUN failed");
2655 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2664 procfs_fetch_registers -- fetch current registers from inferior
2668 void procfs_fetch_registers (int regno)
2672 Read the current values of the inferior's registers, both the
2673 general register set and floating point registers (if supported)
2674 and update gdb's idea of their current values.
2679 procfs_fetch_registers (regno)
2682 struct procinfo *pi;
2684 pi = current_procinfo;
2686 if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
2688 supply_gregset (&pi->gregset);
2690 #if defined (FP0_REGNUM)
2691 if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
2693 supply_fpregset (&pi->fpregset);
2702 proc_init_failed - called whenever /proc access initialization
2707 static void proc_init_failed (struct procinfo *pi, char *why)
2711 This function is called whenever initialization of access to a /proc
2712 entry fails. It prints a suitable error message, does some cleanup,
2713 and then invokes the standard error processing routine which dumps
2714 us back into the command loop.
2718 proc_init_failed (pi, why)
2719 struct procinfo *pi;
2722 print_sys_errmsg (pi->pathname, errno);
2723 kill (pi->pid, SIGKILL);
2724 close_proc_file (pi);
2733 close_proc_file - close any currently open /proc entry
2737 static void close_proc_file (struct procinfo *pip)
2741 Close any currently open /proc entry and mark the process information
2742 entry as invalid. In order to ensure that we don't try to reuse any
2743 stale information, the pid, fd, and pathnames are explicitly
2744 invalidated, which may be overkill.
2749 close_proc_file (pip)
2750 struct procinfo *pip;
2752 struct procinfo *procinfo;
2754 remove_fd (pip); /* Remove fd from poll/select list */
2758 free (pip -> pathname);
2760 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2762 if (procinfo_list == pip)
2763 procinfo_list = pip->next;
2765 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2766 if (procinfo->next == pip)
2767 procinfo->next = pip->next;
2776 open_proc_file - open a /proc entry for a given process id
2780 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2784 Given a process id and a mode, close the existing open /proc
2785 entry (if any) and open one for the new process id, in the
2786 specified mode. Once it is open, then mark the local process
2787 information structure as valid, which guarantees that the pid,
2788 fd, and pathname fields match an open /proc entry. Returns
2789 zero if the open fails, nonzero otherwise.
2791 Note that the pathname is left intact, even when the open fails,
2792 so that callers can use it to construct meaningful error messages
2793 rather than just "file open failed".
2797 open_proc_file (pid, pip, mode)
2799 struct procinfo *pip;
2803 pip -> had_event = 0;
2804 pip -> pathname = xmalloc (32);
2807 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2808 if ((pip -> fd = open (pip -> pathname, mode)) < 0)
2815 mappingflags (flags)
2818 static char asciiflags[8];
2820 strcpy (asciiflags, "-------");
2821 #if defined (MA_PHYS)
2822 if (flags & MA_PHYS) asciiflags[0] = 'd';
2824 if (flags & MA_STACK) asciiflags[1] = 's';
2825 if (flags & MA_BREAK) asciiflags[2] = 'b';
2826 if (flags & MA_SHARED) asciiflags[3] = 's';
2827 if (flags & MA_READ) asciiflags[4] = 'r';
2828 if (flags & MA_WRITE) asciiflags[5] = 'w';
2829 if (flags & MA_EXEC) asciiflags[6] = 'x';
2830 return (asciiflags);
2834 info_proc_flags (pip, summary)
2835 struct procinfo *pip;
2838 struct trans *transp;
2840 printf_filtered ("%-32s", "Process status flags:");
2843 printf_filtered ("\n\n");
2845 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2847 if (pip -> prstatus.pr_flags & transp -> value)
2851 printf_filtered ("%s ", transp -> name);
2855 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2859 printf_filtered ("\n");
2863 info_proc_stop (pip, summary)
2864 struct procinfo *pip;
2867 struct trans *transp;
2871 why = pip -> prstatus.pr_why;
2872 what = pip -> prstatus.pr_what;
2874 if (pip -> prstatus.pr_flags & PR_STOPPED)
2876 printf_filtered ("%-32s", "Reason for stopping:");
2879 printf_filtered ("\n\n");
2881 for (transp = pr_why_table; transp -> name != NULL; transp++)
2883 if (why == transp -> value)
2887 printf_filtered ("%s ", transp -> name);
2891 printf_filtered ("\t%-16s %s.\n",
2892 transp -> name, transp -> desc);
2898 /* Use the pr_why field to determine what the pr_what field means, and
2899 print more information. */
2904 /* pr_what is unused for this case */
2910 printf_filtered ("%s ", signalname (what));
2914 printf_filtered ("\t%-16s %s.\n", signalname (what),
2915 safe_strsignal (what));
2921 printf_filtered ("%s ", syscallname (what));
2925 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2926 "Entered this system call");
2932 printf_filtered ("%s ", syscallname (what));
2936 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2937 "Returned from this system call");
2943 printf_filtered ("%s ",
2944 lookupname (faults_table, what, "fault"));
2948 printf_filtered ("\t%-16s %s.\n",
2949 lookupname (faults_table, what, "fault"),
2950 lookupdesc (faults_table, what));
2954 printf_filtered ("\n");
2959 info_proc_siginfo (pip, summary)
2960 struct procinfo *pip;
2963 struct siginfo *sip;
2965 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2966 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2967 pip -> prstatus.pr_why == PR_FAULTED))
2969 printf_filtered ("%-32s", "Additional signal/fault info:");
2970 sip = &pip -> prstatus.pr_info;
2973 printf_filtered ("%s ", signalname (sip -> si_signo));
2974 if (sip -> si_errno > 0)
2976 printf_filtered ("%s ", errnoname (sip -> si_errno));
2978 if (sip -> si_code <= 0)
2980 printf_filtered ("sent by %s, uid %d ",
2981 target_pid_to_str (sip -> si_pid),
2986 printf_filtered ("%s ", sigcodename (sip));
2987 if ((sip -> si_signo == SIGILL) ||
2988 (sip -> si_signo == SIGFPE) ||
2989 (sip -> si_signo == SIGSEGV) ||
2990 (sip -> si_signo == SIGBUS))
2992 printf_filtered ("addr=%#lx ",
2993 (unsigned long) sip -> si_addr);
2995 else if ((sip -> si_signo == SIGCHLD))
2997 printf_filtered ("child %s, status %u ",
2998 target_pid_to_str (sip -> si_pid),
3001 else if ((sip -> si_signo == SIGPOLL))
3003 printf_filtered ("band %u ", sip -> si_band);
3009 printf_filtered ("\n\n");
3010 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
3011 safe_strsignal (sip -> si_signo));
3012 if (sip -> si_errno > 0)
3014 printf_filtered ("\t%-16s %s.\n",
3015 errnoname (sip -> si_errno),
3016 safe_strerror (sip -> si_errno));
3018 if (sip -> si_code <= 0)
3020 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
3021 "PID of process sending signal");
3022 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
3023 "UID of process sending signal");
3027 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
3029 if ((sip -> si_signo == SIGILL) ||
3030 (sip -> si_signo == SIGFPE))
3032 printf_filtered ("\t%#-16lx %s.\n",
3033 (unsigned long) sip -> si_addr,
3034 "Address of faulting instruction");
3036 else if ((sip -> si_signo == SIGSEGV) ||
3037 (sip -> si_signo == SIGBUS))
3039 printf_filtered ("\t%#-16lx %s.\n",
3040 (unsigned long) sip -> si_addr,
3041 "Address of faulting memory reference");
3043 else if ((sip -> si_signo == SIGCHLD))
3045 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
3046 "Child process ID");
3047 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
3048 "Child process exit value or signal");
3050 else if ((sip -> si_signo == SIGPOLL))
3052 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
3053 "Band event for POLL_{IN,OUT,MSG}");
3057 printf_filtered ("\n");
3062 info_proc_syscalls (pip, summary)
3063 struct procinfo *pip;
3071 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
3072 if (pip -> prstatus.pr_flags & PR_ASLEEP)
3074 int syscallnum = pip -> prstatus.pr_reg[R_D0];
3077 printf_filtered ("%-32s", "Sleeping in system call:");
3078 printf_filtered ("%s", syscallname (syscallnum));
3082 printf_filtered ("Sleeping in system call '%s'.\n",
3083 syscallname (syscallnum));
3088 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
3090 print_sys_errmsg (pip -> pathname, errno);
3091 error ("PIOCGENTRY failed");
3094 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
3096 print_sys_errmsg (pip -> pathname, errno);
3097 error ("PIOCGEXIT failed");
3100 printf_filtered ("System call tracing information:\n\n");
3102 printf_filtered ("\t%-12s %-8s %-8s\n",
3106 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
3109 if (syscall_table[syscallnum] != NULL)
3111 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
3112 printf_filtered ("%-8s ",
3113 prismember (&pip -> entryset, syscallnum)
3115 printf_filtered ("%-8s ",
3116 prismember (&pip -> exitset, syscallnum)
3118 printf_filtered ("\n");
3121 printf_filtered ("\n");
3130 static char locbuf[32];
3132 name = strsigno (signo);
3135 sprintf (locbuf, "Signal %d", signo);
3139 sprintf (locbuf, "%s (%d)", name, signo);
3149 static char locbuf[32];
3151 name = strerrno (errnum);
3154 sprintf (locbuf, "Errno %d", errnum);
3158 sprintf (locbuf, "%s (%d)", name, errnum);
3164 info_proc_signals (pip, summary)
3165 struct procinfo *pip;
3172 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
3174 print_sys_errmsg (pip -> pathname, errno);
3175 error ("PIOCGTRACE failed");
3178 printf_filtered ("Disposition of signals:\n\n");
3179 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3180 "Signal", "Trace", "Hold", "Pending", "Description");
3181 for (signo = 0; signo < NSIG; signo++)
3184 printf_filtered ("\t%-15s ", signalname (signo));
3185 printf_filtered ("%-8s ",
3186 prismember (&pip -> trace, signo)
3188 printf_filtered ("%-8s ",
3189 prismember (&pip -> prstatus.pr_sighold, signo)
3192 #ifdef PROCFS_SIGPEND_OFFSET
3193 /* Alpha OSF/1 numbers the pending signals from 1. */
3194 printf_filtered ("%-8s ",
3195 (signo ? prismember (&pip -> prstatus.pr_sigpend,
3200 printf_filtered ("%-8s ",
3201 prismember (&pip -> prstatus.pr_sigpend, signo)
3204 printf_filtered (" %s\n", safe_strsignal (signo));
3206 printf_filtered ("\n");
3211 info_proc_faults (pip, summary)
3212 struct procinfo *pip;
3215 struct trans *transp;
3219 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
3221 print_sys_errmsg (pip -> pathname, errno);
3222 error ("PIOCGFAULT failed");
3225 printf_filtered ("Current traced hardware fault set:\n\n");
3226 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3228 for (transp = faults_table; transp -> name != NULL; transp++)
3231 printf_filtered ("\t%-12s ", transp -> name);
3232 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
3234 printf_filtered ("\n");
3236 printf_filtered ("\n");
3241 info_proc_mappings (pip, summary)
3242 struct procinfo *pip;
3246 struct prmap *prmaps;
3247 struct prmap *prmap;
3251 printf_filtered ("Mapped address spaces:\n\n");
3252 #ifdef BFD_HOST_64_BIT
3253 printf_filtered (" %18s %18s %10s %10s %7s\n",
3255 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3262 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
3264 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3265 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
3267 for (prmap = prmaps; prmap -> pr_size; ++prmap)
3269 #ifdef BFD_HOST_64_BIT
3270 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
3272 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
3274 (unsigned long)prmap -> pr_vaddr,
3275 (unsigned long)prmap -> pr_vaddr
3276 + prmap -> pr_size - 1,
3279 mappingflags (prmap -> pr_mflags));
3283 printf_filtered ("\n");
3291 info_proc -- implement the "info proc" command
3295 void info_proc (char *args, int from_tty)
3299 Implement gdb's "info proc" command by using the /proc interface
3300 to print status information about any currently running process.
3302 Examples of the use of "info proc" are:
3304 info proc (prints summary info for current inferior)
3305 info proc 123 (prints summary info for process with pid 123)
3306 info proc mappings (prints address mappings)
3307 info proc times (prints process/children times)
3308 info proc id (prints pid, ppid, gid, sid, etc)
3309 FIXME: i proc id not implemented.
3310 info proc status (prints general process state info)
3311 FIXME: i proc status not implemented.
3312 info proc signals (prints info about signal handling)
3313 info proc all (prints all info)
3318 info_proc (args, from_tty)
3323 struct procinfo *pip;
3324 struct cleanup *old_chain;
3338 old_chain = make_cleanup (null_cleanup, 0);
3340 /* Default to using the current inferior if no pid specified. Note
3341 that inferior_pid may be 0, hence we set okerr. */
3343 pip = find_procinfo (inferior_pid, 1);
3347 if ((argv = buildargv (args)) == NULL)
3351 make_cleanup (freeargv, (char *) argv);
3353 while (*argv != NULL)
3355 argsize = strlen (*argv);
3356 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
3361 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
3366 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
3371 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
3376 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
3381 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
3386 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
3391 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
3396 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
3401 else if ((pid = atoi (*argv)) > 0)
3403 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
3404 memset (pip, 0, sizeof (*pip));
3407 if (!open_proc_file (pid, pip, O_RDONLY))
3409 perror_with_name (pip -> pathname);
3412 make_cleanup (close_proc_file, pip);
3414 else if (**argv != '\000')
3416 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
3422 /* If we don't have a valid open process at this point, then we have no
3423 inferior or didn't specify a specific pid. */
3428 No process. Start debugging a program or specify an explicit process ID.");
3430 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
3432 print_sys_errmsg (pip -> pathname, errno);
3433 error ("PIOCSTATUS failed");
3436 /* Print verbose information of the requested type(s), or just a summary
3437 of the information for all types. */
3439 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
3440 if (summary || all || flags)
3442 info_proc_flags (pip, summary);
3446 info_proc_stop (pip, summary);
3448 if (summary || all || signals || faults)
3450 info_proc_siginfo (pip, summary);
3452 if (summary || all || syscalls)
3454 info_proc_syscalls (pip, summary);
3456 if (summary || all || mappings)
3458 info_proc_mappings (pip, summary);
3460 if (summary || all || signals)
3462 info_proc_signals (pip, summary);
3464 if (summary || all || faults)
3466 info_proc_faults (pip, summary);
3468 printf_filtered ("\n");
3470 /* All done, deal with closing any temporary process info structure,
3471 freeing temporary memory , etc. */
3473 do_cleanups (old_chain);
3480 procfs_set_sproc_trap -- arrange for child to stop on sproc().
3484 void procfs_set_sproc_trap (struct procinfo *)
3488 This function sets up a trap on sproc system call exits so that we can
3489 detect the arrival of a new thread. We are called with the new thread
3490 stopped prior to it's first instruction.
3492 Also note that we turn on the inherit-on-fork flag in the child process
3493 so that any grand-children start with all tracing flags set.
3499 procfs_set_sproc_trap (pi)
3500 struct procinfo *pi;
3504 if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
3506 print_sys_errmsg (pi->pathname, errno);
3507 error ("PIOCGEXIT failed");
3510 praddset (&exitset, SYS_sproc);
3512 /* We trap on fork() and vfork() in order to disable debugging in our grand-
3513 children and descendant processes. At this time, GDB can only handle
3514 threads (multiple processes, one address space). forks (and execs) result
3515 in the creation of multiple address spaces, which GDB can't handle yet. */
3517 praddset (&exitset, SYS_fork);
3519 praddset (&exitset, SYS_vfork);
3522 if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
3524 print_sys_errmsg (pi->pathname, errno);
3525 error ("PIOCSEXIT failed");
3528 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3529 tracing flags set. */
3531 #ifdef PIOCSET /* New method */
3535 ioctl (pi->fd, PIOCSET, &pr_flags);
3538 #ifdef PIOCSFORK /* Original method */
3539 ioctl (pi->fd, PIOCSFORK, NULL);
3543 #endif /* SYS_sproc */
3545 /* Fork an inferior process, and start debugging it with /proc. */
3548 procfs_create_inferior (exec_file, allargs, env)
3553 char *shell_file = getenv ("SHELL");
3555 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
3558 /* We will be looking down the PATH to find shell_file. If we
3559 just do this the normal way (via execlp, which operates by
3560 attempting an exec for each element of the PATH until it
3561 finds one which succeeds), then there will be an exec for
3562 each failed attempt, each of which will cause a PR_SYSEXIT
3563 stop, and we won't know how to distinguish the PR_SYSEXIT's
3564 for these failed execs with the ones for successful execs
3565 (whether the exec has succeeded is stored at that time in the
3566 carry bit or some such architecture-specific and
3567 non-ABI-specified place).
3569 So I can't think of anything better than to search the PATH
3570 now. This has several disadvantages: (1) There is a race
3571 condition; if we find a file now and it is deleted before we
3572 exec it, we lose, even if the deletion leaves a valid file
3573 further down in the PATH, (2) there is no way to know exactly
3574 what an executable (in the sense of "capable of being
3575 exec'd") file is. Using access() loses because it may lose
3576 if the caller is the superuser; failing to use it loses if
3577 there are ACLs or some such. */
3581 /* FIXME-maybe: might want "set path" command so user can change what
3582 path is used from within GDB. */
3583 char *path = getenv ("PATH");
3585 struct stat statbuf;
3588 path = "/bin:/usr/bin";
3590 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
3591 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
3593 p1 = strchr (p, ':');
3598 strncpy (tryname, p, len);
3599 tryname[len] = '\0';
3600 strcat (tryname, "/");
3601 strcat (tryname, shell_file);
3602 if (access (tryname, X_OK) < 0)
3604 if (stat (tryname, &statbuf) < 0)
3606 if (!S_ISREG (statbuf.st_mode))
3607 /* We certainly need to reject directories. I'm not quite
3608 as sure about FIFOs, sockets, etc., but I kind of doubt
3609 that people want to exec() these things. */
3614 /* Not found. This must be an error rather than merely passing
3615 the file to execlp(), because execlp() would try all the
3616 exec()s, causing GDB to get confused. */
3617 error ("Can't find shell %s in PATH", shell_file);
3619 shell_file = tryname;
3622 fork_inferior (exec_file, allargs, env,
3623 proc_set_exec_trap, procfs_init_inferior, shell_file);
3625 /* We are at the first instruction we care about. */
3626 /* Pedal to the metal... */
3628 /* Setup traps on exit from sproc() */
3631 procfs_set_sproc_trap (current_procinfo);
3634 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
3637 /* Clean up after the inferior dies. */
3640 procfs_mourn_inferior ()
3642 struct procinfo *pi;
3643 struct procinfo *next_pi;
3645 for (pi = procinfo_list; pi; pi = next_pi)
3648 unconditionally_kill_inferior (pi);
3651 unpush_target (&procfs_ops);
3652 generic_mourn_inferior ();
3656 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3662 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
3664 /* Insert a watchpoint */
3666 procfs_set_watchpoint(pid, addr, len, rw)
3672 struct procinfo *pi;
3675 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3676 wpt.pr_vaddr = (caddr_t)addr;
3678 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
3679 if (ioctl (pi->fd, PIOCSWATCH, &wpt) < 0)
3683 /* Currently it sometimes happens that the same watchpoint gets
3684 deleted twice - don't die in this case (FIXME please) */
3685 if (errno == ESRCH && len == 0)
3687 print_sys_errmsg (pi->pathname, errno);
3688 error ("PIOCSWATCH failed");
3694 procfs_stopped_by_watchpoint(pid)
3697 struct procinfo *pi;
3701 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3702 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3704 why = pi->prstatus.pr_why;
3705 what = pi->prstatus.pr_what;
3706 if (why == PR_FAULTED
3707 #if defined (FLTWATCH) && defined (FLTKWATCH)
3708 && (what == FLTWATCH) || (what == FLTKWATCH)
3711 && (what == FLTWATCH)
3714 && (what == FLTKWATCH)
3724 /* Send a SIGINT to the process group. This acts just like the user typed a
3725 ^C on the controlling terminal.
3727 XXX - This may not be correct for all systems. Some may want to use
3728 killpg() instead of kill (-pgrp). */
3733 extern pid_t inferior_process_group;
3735 kill (-inferior_process_group, SIGINT);
3739 struct target_ops procfs_ops = {
3740 "procfs", /* to_shortname */
3741 "Unix /proc child process", /* to_longname */
3742 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3743 procfs_open, /* to_open */
3745 procfs_attach, /* to_attach */
3746 procfs_detach, /* to_detach */
3747 procfs_resume, /* to_resume */
3748 procfs_wait, /* to_wait */
3749 procfs_fetch_registers, /* to_fetch_registers */
3750 procfs_store_registers, /* to_store_registers */
3751 procfs_prepare_to_store, /* to_prepare_to_store */
3752 procfs_xfer_memory, /* to_xfer_memory */
3753 procfs_files_info, /* to_files_info */
3754 memory_insert_breakpoint, /* to_insert_breakpoint */
3755 memory_remove_breakpoint, /* to_remove_breakpoint */
3756 terminal_init_inferior, /* to_terminal_init */
3757 terminal_inferior, /* to_terminal_inferior */
3758 terminal_ours_for_output, /* to_terminal_ours_for_output */
3759 terminal_ours, /* to_terminal_ours */
3760 child_terminal_info, /* to_terminal_info */
3761 procfs_kill_inferior, /* to_kill */
3763 0, /* to_lookup_symbol */
3764 procfs_create_inferior, /* to_create_inferior */
3765 procfs_mourn_inferior, /* to_mourn_inferior */
3766 procfs_can_run, /* to_can_run */
3767 procfs_notice_signals, /* to_notice_signals */
3768 0 /* to_thread_alive */
3769 procfs_stop, /* to_stop */
3770 process_stratum, /* to_stratum */
3772 1, /* to_has_all_memory */
3773 1, /* to_has_memory */
3774 1, /* to_has_stack */
3775 1, /* to_has_registers */
3776 1, /* to_has_execution */
3778 0, /* sections_end */
3779 OPS_MAGIC /* to_magic */
3783 _initialize_procfs ()
3785 #ifdef HAVE_OPTIONAL_PROC_FS
3789 /* If we have an optional /proc filesystem (e.g. under OSF/1),
3790 don't add procfs support if we cannot access the running
3792 sprintf (procname, PROC_NAME_FMT, getpid ());
3793 if ((fd = open (procname, O_RDONLY)) < 0)
3798 add_target (&procfs_ops);
3800 add_info ("proc", info_proc,
3801 "Show process status information using /proc entry.\n\
3802 Specify process id or use current inferior by default.\n\
3803 Specify keywords for detailed information; default is summary.\n\
3804 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3805 `status', `syscalls', and `times'.\n\
3806 Unambiguous abbreviations may be used.");
3808 init_syscall_table ();