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>
44 #include "gdb_string.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_CLEAR_CURSIG_FOR_KILL
1255 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1256 before the PIOCKILL, otherwise it might generate a corrupted core
1257 file for the inferior. */
1258 ioctl (pi->fd, PIOCSSIG, NULL);
1260 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1261 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1262 to kill the inferior, otherwise it might remain stopped with a
1264 We do not check the result of the PIOCSSIG, the inferior might have
1267 struct siginfo newsiginfo;
1269 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
1270 newsiginfo.si_signo = signo;
1271 newsiginfo.si_code = 0;
1272 newsiginfo.si_errno = 0;
1273 newsiginfo.si_pid = getpid ();
1274 newsiginfo.si_uid = getuid ();
1275 ioctl (pi->fd, PIOCSSIG, &newsiginfo);
1278 ioctl (pi->fd, PIOCKILL, &signo);
1281 close_proc_file (pi);
1283 /* Only wait() for our direct children. Our grandchildren zombies are killed
1284 by the death of their parents. */
1286 if (ppid == getpid())
1294 procfs_xfer_memory -- copy data to or from inferior memory space
1298 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1299 int dowrite, struct target_ops target)
1303 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1304 from/to debugger memory starting at MYADDR. Copy from inferior
1305 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1307 Returns the length copied, which is either the LEN argument or
1308 zero. This xfer function does not do partial moves, since procfs_ops
1309 doesn't allow memory operations to cross below us in the target stack
1314 The /proc interface makes this an almost trivial task.
1318 procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
1323 struct target_ops *target; /* ignored */
1326 struct procinfo *pi;
1328 pi = current_procinfo;
1330 if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
1334 nbytes = write (pi->fd, myaddr, len);
1338 nbytes = read (pi->fd, myaddr, len);
1352 procfs_store_registers -- copy register values back to inferior
1356 void procfs_store_registers (int regno)
1360 Store our current register values back into the inferior. If
1361 REGNO is -1 then store all the register, otherwise store just
1362 the value specified by REGNO.
1366 If we are storing only a single register, we first have to get all
1367 the current values from the process, overwrite the desired register
1368 in the gregset with the one we want from gdb's registers, and then
1369 send the whole set back to the process. For writing all the
1370 registers, all we have to do is generate the gregset and send it to
1373 Also note that the process has to be stopped on an event of interest
1374 for this to work, which basically means that it has to have been
1375 run under the control of one of the other /proc ioctl calls and not
1376 ptrace. Since we don't use ptrace anyway, we don't worry about this
1377 fine point, but it is worth noting for future reference.
1379 Gdb is confused about what this function is supposed to return.
1380 Some versions return a value, others return nothing. Some are
1381 declared to return a value and actually return nothing. Gdb ignores
1382 anything returned. (FIXME)
1387 procfs_store_registers (regno)
1390 struct procinfo *pi;
1392 pi = current_procinfo;
1396 ioctl (pi->fd, PIOCGREG, &pi->gregset);
1398 fill_gregset (&pi->gregset, regno);
1399 ioctl (pi->fd, PIOCSREG, &pi->gregset);
1401 #if defined (FP0_REGNUM)
1403 /* Now repeat everything using the floating point register set, if the
1404 target has floating point hardware. Since we ignore the returned value,
1405 we'll never know whether it worked or not anyway. */
1409 ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
1411 fill_fpregset (&pi->fpregset, regno);
1412 ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
1414 #endif /* FP0_REGNUM */
1422 create_procinfo - initialize access to a /proc entry
1426 struct procinfo * create_procinfo (int pid)
1430 Allocate a procinfo structure, open the /proc file and then set up the
1431 set of signals and faults that are to be traced. Returns a pointer to
1432 the new procinfo structure.
1436 If proc_init_failed ever gets called, control returns to the command
1437 processing loop via the standard error handling code.
1441 static struct procinfo *
1442 create_procinfo (pid)
1445 struct procinfo *pi;
1447 pi = find_procinfo (pid, 1);
1449 return pi; /* All done! It already exists */
1451 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1453 if (!open_proc_file (pid, pi, O_RDWR))
1454 proc_init_failed (pi, "can't open process file");
1456 /* Add new process to process info list */
1458 pi->next = procinfo_list;
1461 add_fd (pi); /* Add to list for poll/select */
1463 memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
1464 prfillset (&pi->prrun.pr_trace);
1465 procfs_notice_signals (pid);
1466 prfillset (&pi->prrun.pr_fault);
1467 prdelset (&pi->prrun.pr_fault, FLTPAGE);
1469 #ifdef PROCFS_DONT_TRACE_FAULTS
1470 premptyset (&pi->prrun.pr_fault);
1473 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
1474 proc_init_failed (pi, "PIOCWSTOP failed");
1476 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
1477 proc_init_failed (pi, "PIOCSFAULT failed");
1486 procfs_init_inferior - initialize target vector and access to a
1491 void procfs_init_inferior (int pid)
1495 When gdb starts an inferior, this function is called in the parent
1496 process immediately after the fork. It waits for the child to stop
1497 on the return from the exec system call (the child itself takes care
1498 of ensuring that this is set up), then sets up the set of signals
1499 and faults that are to be traced.
1503 If proc_init_failed ever gets called, control returns to the command
1504 processing loop via the standard error handling code.
1509 procfs_init_inferior (pid)
1512 push_target (&procfs_ops);
1514 create_procinfo (pid);
1515 add_thread (pid); /* Setup initial thread */
1517 #ifdef START_INFERIOR_TRAPS_EXPECTED
1518 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
1520 /* One trap to exec the shell, one to exec the program being debugged. */
1521 startup_inferior (2);
1529 procfs_notice_signals
1533 static void procfs_notice_signals (int pid);
1537 When the user changes the state of gdb's signal handling via the
1538 "handle" command, this function gets called to see if any change
1539 in the /proc interface is required. It is also called internally
1540 by other /proc interface functions to initialize the state of
1541 the traced signal set.
1543 One thing it does is that signals for which the state is "nostop",
1544 "noprint", and "pass", have their trace bits reset in the pr_trace
1545 field, so that they are no longer traced. This allows them to be
1546 delivered directly to the inferior without the debugger ever being
1551 procfs_notice_signals (pid)
1555 struct procinfo *pi;
1557 pi = find_procinfo (pid, 0);
1559 for (signo = 0; signo < NSIG; signo++)
1561 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
1562 signal_print_state (target_signal_from_host (signo)) == 0 &&
1563 signal_pass_state (target_signal_from_host (signo)) == 1)
1565 prdelset (&pi->prrun.pr_trace, signo);
1569 praddset (&pi->prrun.pr_trace, signo);
1572 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
1574 print_sys_errmsg ("PIOCSTRACE failed", errno);
1582 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1586 void proc_set_exec_trap (void)
1590 This function is called in the child process when starting up
1591 an inferior, prior to doing the exec of the actual inferior.
1592 It sets the child process's exitset to make exit from the exec
1593 system call an event of interest to stop on, and then simply
1594 returns. The child does the exec, the system call returns, and
1595 the child stops at the first instruction, ready for the gdb
1596 parent process to take control of it.
1600 We need to use all local variables since the child may be sharing
1601 it's data space with the parent, if vfork was used rather than
1604 Also note that we want to turn off the inherit-on-fork flag in
1605 the child process so that any grand-children start with all
1606 tracing flags cleared.
1610 proc_set_exec_trap ()
1614 auto char procname[32];
1617 sprintf (procname, PROC_NAME_FMT, getpid ());
1618 if ((fd = open (procname, O_RDWR)) < 0)
1621 gdb_flush (gdb_stderr);
1624 premptyset (&exitset);
1625 premptyset (&entryset);
1628 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
1629 exits from exec system calls because of the user level loader. */
1633 if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
1636 gdb_flush (gdb_stderr);
1639 prfs_flags |= PRFS_STOPEXEC;
1640 if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
1643 gdb_flush (gdb_stderr);
1649 Not all systems with /proc have all the exec* syscalls with the same
1650 names. On the SGI, for example, there is no SYS_exec, but there
1651 *is* a SYS_execv. So, we try to account for that. */
1654 praddset (&exitset, SYS_exec);
1657 praddset (&exitset, SYS_execve);
1660 praddset (&exitset, SYS_execv);
1663 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1666 gdb_flush (gdb_stderr);
1671 praddset (&entryset, SYS_exit);
1673 if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
1676 gdb_flush (gdb_stderr);
1680 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1681 start with tracing flags cleared. */
1683 #if defined (PIOCRESET) /* New method */
1687 ioctl (fd, PIOCRESET, &pr_flags);
1690 #if defined (PIOCRFORK) /* Original method */
1691 ioctl (fd, PIOCRFORK, NULL);
1695 /* Turn on run-on-last-close flag so that this process will not hang
1696 if GDB goes away for some reason. */
1698 #if defined (PIOCSET) /* New method */
1702 (void) ioctl (fd, PIOCSET, &pr_flags);
1705 #if defined (PIOCSRLC) /* Original method */
1706 (void) ioctl (fd, PIOCSRLC, 0);
1715 proc_iterate_over_mappings -- call function for every mapped space
1719 int proc_iterate_over_mappings (int (*func)())
1723 Given a pointer to a function, call that function for every
1724 mapped address space, passing it an open file descriptor for
1725 the file corresponding to that mapped address space (if any)
1726 and the base address of the mapped space. Quit when we hit
1727 the end of the mappings or the function returns nonzero.
1731 proc_iterate_over_mappings (func)
1732 int (*func) PARAMS ((int, CORE_ADDR));
1737 struct prmap *prmaps;
1738 struct prmap *prmap;
1739 struct procinfo *pi;
1741 pi = current_procinfo;
1743 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1745 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1746 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1748 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1750 fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
1751 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1759 #if 0 /* Currently unused */
1764 proc_base_address -- find base address for segment containing address
1768 CORE_ADDR proc_base_address (CORE_ADDR addr)
1772 Given an address of a location in the inferior, find and return
1773 the base address of the mapped segment containing that address.
1775 This is used for example, by the shared library support code,
1776 where we have the pc value for some location in the shared library
1777 where we are stopped, and need to know the base address of the
1778 segment containing that address.
1782 proc_base_address (addr)
1786 struct prmap *prmaps;
1787 struct prmap *prmap;
1788 CORE_ADDR baseaddr = 0;
1789 struct procinfo *pi;
1791 pi = current_procinfo;
1793 if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
1795 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1796 if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
1798 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1800 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1801 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1803 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1818 proc_address_to_fd -- return open fd for file mapped to address
1822 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
1826 Given an address in the current inferior's address space, use the
1827 /proc interface to find an open file descriptor for the file that
1828 this address was mapped in from. Return -1 if there is no current
1829 inferior. Print a warning message if there is an inferior but
1830 the address corresponds to no file (IE a bogus address).
1835 proc_address_to_fd (pi, addr, complain)
1836 struct procinfo *pi;
1842 if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1846 print_sys_errmsg (pi->pathname, errno);
1847 warning ("can't find mapped file for address 0x%x", addr);
1854 /* Attach to process PID, then initialize for debugging it
1855 and wait for the trace-trap that results from attaching. */
1858 procfs_attach (args, from_tty)
1866 error_no_arg ("process-id to attach");
1870 if (pid == getpid()) /* Trying to masturbate? */
1871 error ("I refuse to debug myself!");
1875 exec_file = (char *) get_exec_file (0);
1878 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
1880 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
1882 gdb_flush (gdb_stdout);
1887 push_target (&procfs_ops);
1891 /* Take a program previously attached to and detaches it.
1892 The program resumes execution and will no longer stop
1893 on signals, etc. We'd better not have left any breakpoints
1894 in the program or it'll die when it hits one. For this
1895 to work, it may be necessary for the process to have been
1896 previously attached. It *might* work if the program was
1897 started via the normal ptrace (PTRACE_TRACEME). */
1900 procfs_detach (args, from_tty)
1908 char *exec_file = get_exec_file (0);
1911 printf_unfiltered ("Detaching from program: %s %s\n",
1912 exec_file, target_pid_to_str (inferior_pid));
1913 gdb_flush (gdb_stdout);
1916 siggnal = atoi (args);
1918 do_detach (siggnal);
1920 unpush_target (&procfs_ops); /* Pop out of handling an inferior */
1923 /* Get ready to modify the registers array. On machines which store
1924 individual registers, this doesn't need to do anything. On machines
1925 which store all the registers in one fell swoop, this makes sure
1926 that registers contains all the registers from the program being
1930 procfs_prepare_to_store ()
1932 #ifdef CHILD_PREPARE_TO_STORE
1933 CHILD_PREPARE_TO_STORE ();
1937 /* Print status information about what we're accessing. */
1940 procfs_files_info (ignore)
1941 struct target_ops *ignore;
1943 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
1944 attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
1949 procfs_open (arg, from_tty)
1953 error ("Use the \"run\" command to start a Unix child process.");
1960 do_attach -- attach to an already existing process
1964 int do_attach (int pid)
1968 Attach to an already existing process with the specified process
1969 id. If the process is not already stopped, query whether to
1974 The option of stopping at attach time is specific to the /proc
1975 versions of gdb. Versions using ptrace force the attachee
1976 to stop. (I have changed this version to do so, too. All you
1977 have to do is "continue" to make it go on. -- gnu@cygnus.com)
1986 struct procinfo *pi;
1988 pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
1990 if (!open_proc_file (pid, pi, O_RDWR))
1993 perror_with_name (pi->pathname);
1997 /* Add new process to process info list */
1999 pi->next = procinfo_list;
2002 add_fd (pi); /* Add to list for poll/select */
2004 /* Get current status of process and if it is not already stopped,
2005 then stop it. Remember whether or not it was stopped when we first
2008 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2010 print_sys_errmsg (pi->pathname, errno);
2011 close_proc_file (pi);
2012 error ("PIOCSTATUS failed");
2014 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2016 pi->was_stopped = 1;
2020 pi->was_stopped = 0;
2021 if (1 || query ("Process is currently running, stop it? "))
2023 /* Make it run again when we close it. */
2024 #if defined (PIOCSET) /* New method */
2028 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2031 #if defined (PIOCSRLC) /* Original method */
2032 result = ioctl (pi->fd, PIOCSRLC, 0);
2037 print_sys_errmsg (pi->pathname, errno);
2038 close_proc_file (pi);
2039 error ("PIOCSRLC or PIOCSET failed");
2041 if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
2043 print_sys_errmsg (pi->pathname, errno);
2044 close_proc_file (pi);
2045 error ("PIOCSTOP failed");
2047 pi->nopass_next_sigstop = 1;
2051 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
2055 /* Remember some things about the inferior that we will, or might, change
2056 so that we can restore them when we detach. */
2058 ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
2059 ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
2060 ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
2061 ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
2062 ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
2064 /* Set up trace and fault sets, as gdb expects them. */
2066 memset (&pi->prrun, 0, sizeof (pi->prrun));
2067 prfillset (&pi->prrun.pr_trace);
2068 procfs_notice_signals (pid);
2069 prfillset (&pi->prrun.pr_fault);
2070 prdelset (&pi->prrun.pr_fault, FLTPAGE);
2072 #ifdef PROCFS_DONT_TRACE_FAULTS
2073 premptyset (&pi->prrun.pr_fault);
2076 if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
2078 print_sys_errmsg ("PIOCSFAULT failed", errno);
2080 if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
2082 print_sys_errmsg ("PIOCSTRACE failed", errno);
2092 do_detach -- detach from an attached-to process
2096 void do_detach (int signal)
2100 Detach from the current attachee.
2102 If signal is non-zero, the attachee is started running again and sent
2103 the specified signal.
2105 If signal is zero and the attachee was not already stopped when we
2106 attached to it, then we make it runnable again when we detach.
2108 Otherwise, we query whether or not to make the attachee runnable
2109 again, since we may simply want to leave it in the state it was in
2112 We report any problems, but do not consider them errors, since we
2113 MUST detach even if some things don't seem to go right. This may not
2114 be the ideal situation. (FIXME).
2122 struct procinfo *pi;
2124 pi = current_procinfo;
2128 set_proc_siginfo (pi, signal);
2130 if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
2132 print_sys_errmsg (pi->pathname, errno);
2133 printf_unfiltered ("PIOCSEXIT failed.\n");
2135 if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
2137 print_sys_errmsg (pi->pathname, errno);
2138 printf_unfiltered ("PIOCSENTRY failed.\n");
2140 if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
2142 print_sys_errmsg (pi->pathname, errno);
2143 printf_unfiltered ("PIOCSTRACE failed.\n");
2145 if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
2147 print_sys_errmsg (pi->pathname, errno);
2148 printf_unfiltered ("PIOSCHOLD failed.\n");
2150 if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
2152 print_sys_errmsg (pi->pathname, errno);
2153 printf_unfiltered ("PIOCSFAULT failed.\n");
2155 if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
2157 print_sys_errmsg (pi->pathname, errno);
2158 printf_unfiltered ("PIOCSTATUS failed.\n");
2162 if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2164 if (signal || !pi->was_stopped ||
2165 query ("Was stopped when attached, make it runnable again? "))
2167 /* Clear any pending signal if we want to detach without
2170 set_proc_siginfo (pi, signal);
2172 /* Clear any fault that might have stopped it. */
2173 if (ioctl (pi->fd, PIOCCFAULT, 0))
2175 print_sys_errmsg (pi->pathname, errno);
2176 printf_unfiltered ("PIOCCFAULT failed.\n");
2179 /* Make it run again when we close it. */
2180 #if defined (PIOCSET) /* New method */
2184 result = ioctl (pi->fd, PIOCSET, &pr_flags);
2187 #if defined (PIOCSRLC) /* Original method */
2188 result = ioctl (pi->fd, PIOCSRLC, 0);
2193 print_sys_errmsg (pi->pathname, errno);
2194 printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
2199 close_proc_file (pi);
2203 /* emulate wait() as much as possible.
2204 Wait for child to do something. Return pid of child, or -1 in case
2205 of error; store status in *OURSTATUS.
2207 Not sure why we can't
2208 just use wait(), but it seems to have problems when applied to a
2209 process being controlled with the /proc interface.
2211 We have a race problem here with no obvious solution. We need to let
2212 the inferior run until it stops on an event of interest, which means
2213 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
2214 ioctl if the process is already stopped on something that is not an
2215 event of interest, or the call will hang indefinitely. Thus we first
2216 use PIOCSTATUS to see if the process is not stopped. If not, then we
2217 use PIOCWSTOP. But during the window between the two, if the process
2218 stops for any reason that is not an event of interest (such as a job
2219 control signal) then gdb will hang. One possible workaround is to set
2220 an alarm to wake up every minute of so and check to see if the process
2221 is still running, and if so, then reissue the PIOCWSTOP. But this is
2222 a real kludge, so has not been implemented. FIXME: investigate
2225 FIXME: Investigate why wait() seems to have problems with programs
2226 being control by /proc routines. */
2229 procfs_wait (pid, ourstatus)
2231 struct target_waitstatus *ourstatus;
2238 struct procinfo *pi;
2240 if (pid != -1) /* Non-specific process? */
2243 for (pi = procinfo_list; pi; pi = pi->next)
2255 for (pi = procinfo_list; pi; pi = pi->next)
2256 if (pi->pid == pid && pi->had_event)
2259 if (!pi && !checkerr)
2262 if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
2264 if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
2271 if (errno == ENOENT)
2273 rtnval = wait (&statval);
2274 if (rtnval != inferior_pid)
2276 print_sys_errmsg (pi->pathname, errno);
2277 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
2283 print_sys_errmsg (pi->pathname, errno);
2284 error ("PIOCSTATUS or PIOCWSTOP failed.");
2288 else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
2290 rtnval = pi->prstatus.pr_pid;
2291 why = pi->prstatus.pr_why;
2292 what = pi->prstatus.pr_what;
2297 statval = (what << 8) | 0177;
2300 if (what != SYS_exit)
2301 error ("PR_SYSENTRY, unknown system call %d", what);
2303 pi->prrun.pr_flags = PRCFAULT;
2305 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2306 perror_with_name (pi->pathname);
2308 rtnval = wait (&statval);
2323 statval = (SIGTRAP << 8) | 0177;
2327 /* We've just detected the completion of an sproc system call. Now we need to
2328 setup a procinfo struct for this thread, and notify the thread system of the
2331 /* If sproc failed, then nothing interesting happened. Continue the process and
2332 go back to sleep. */
2334 if (pi->prstatus.pr_errno != 0)
2336 pi->prrun.pr_flags &= PRSTEP;
2337 pi->prrun.pr_flags |= PRCFAULT;
2339 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2340 perror_with_name (pi->pathname);
2345 /* At this point, the new thread is stopped at it's first instruction, and
2346 the parent is stopped at the exit from sproc. */
2348 /* Notify the caller of the arrival of a new thread. */
2349 create_procinfo (pi->prstatus.pr_rval1);
2351 rtnval = pi->prstatus.pr_rval1;
2352 statval = (SIGTRAP << 8) | 0177;
2359 /* At this point, we've detected the completion of a fork (or vfork) call in
2360 our child. The grandchild is also stopped because we set inherit-on-fork
2361 earlier. (Note that nobody has the grandchilds' /proc file open at this
2362 point.) We will release the grandchild from the debugger by opening it's
2363 /proc file and then closing it. Since run-on-last-close is set, the
2364 grandchild continues on its' merry way. */
2367 struct procinfo *pitemp;
2369 pitemp = create_procinfo (pi->prstatus.pr_rval1);
2371 close_proc_file (pitemp);
2373 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2374 perror_with_name (pi->pathname);
2377 #endif /* SYS_sproc */
2380 error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
2384 statval = (SIGSTOP << 8) | 0177;
2387 statval = (what << 8) | 0177;
2394 statval = (SIGTRAP << 8) | 0177;
2399 statval = (SIGTRAP << 8) | 0177;
2402 #ifndef FAULTED_USE_SIGINFO
2403 /* Irix, contrary to the documentation, fills in 0 for si_signo.
2404 Solaris fills in si_signo. I'm not sure about others. */
2407 statval = (SIGILL << 8) | 0177;
2411 statval = (SIGTRAP << 8) | 0177;
2416 statval = (SIGSEGV << 8) | 0177;
2421 statval = (SIGFPE << 8) | 0177;
2423 case FLTPAGE: /* Recoverable page fault */
2424 #endif /* not FAULTED_USE_SIGINFO */
2426 /* Use the signal which the kernel assigns. This is better than
2427 trying to second-guess it from the fault. In fact, I suspect
2428 that FLTACCESS can be either SIGSEGV or SIGBUS. */
2429 statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
2434 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
2436 /* Stop all the other threads when any of them stops. */
2439 struct procinfo *procinfo;
2441 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2443 if (!procinfo->had_event)
2444 if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
2446 print_sys_errmsg (procinfo->pathname, errno);
2447 error ("PIOCSTOP failed");
2454 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
2455 pi->prstatus.pr_flags);
2458 store_waitstatus (ourstatus, statval);
2460 if (rtnval == -1) /* No more children to wait for */
2462 fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
2463 /* Claim it exited with unknown signal. */
2464 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2465 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
2469 pi->had_event = 0; /* Indicate that we've seen this one */
2477 set_proc_siginfo - set a process's current signal info
2481 void set_proc_siginfo (struct procinfo *pip, int signo);
2485 Given a pointer to a process info struct in PIP and a signal number
2486 in SIGNO, set the process's current signal and its associated signal
2487 information. The signal will be delivered to the process immediately
2488 after execution is resumed, even if it is being held. In addition,
2489 this particular delivery will not cause another PR_SIGNALLED stop
2490 even if the signal is being traced.
2492 If we are not delivering the same signal that the prstatus siginfo
2493 struct contains information about, then synthesize a siginfo struct
2494 to match the signal we are doing to deliver, make it of the type
2495 "generated by a user process", and send this synthesized copy. When
2496 used to set the inferior's signal state, this will be required if we
2497 are not currently stopped because of a traced signal, or if we decide
2498 to continue with a different signal.
2500 Note that when continuing the inferior from a stop due to receipt
2501 of a traced signal, we either have set PRCSIG to clear the existing
2502 signal, or we have to call this function to do a PIOCSSIG with either
2503 the existing siginfo struct from pr_info, or one we have synthesized
2504 appropriately for the signal we want to deliver. Otherwise if the
2505 signal is still being traced, the inferior will immediately stop
2508 See siginfo(5) for more details.
2512 set_proc_siginfo (pip, signo)
2513 struct procinfo *pip;
2516 struct siginfo newsiginfo;
2517 struct siginfo *sip;
2519 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
2520 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
2521 receives a PIOCSSIG with a signal identical to the current signal,
2522 it messes up the current signal. Work around the kernel bug. */
2523 if (signo == pip -> prstatus.pr_cursig)
2527 if (signo == pip -> prstatus.pr_info.si_signo)
2529 sip = &pip -> prstatus.pr_info;
2533 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2535 sip -> si_signo = signo;
2537 sip -> si_errno = 0;
2538 sip -> si_pid = getpid ();
2539 sip -> si_uid = getuid ();
2541 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2543 print_sys_errmsg (pip -> pathname, errno);
2544 warning ("PIOCSSIG failed");
2548 /* Resume execution of process PID. If STEP is nozero, then
2549 just single step it. If SIGNAL is nonzero, restart it with that
2550 signal activated. */
2553 procfs_resume (pid, step, signo)
2556 enum target_signal signo;
2559 struct procinfo *pi, *procinfo;
2561 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
2564 pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2567 /* It should not be necessary. If the user explicitly changes the value,
2568 value_assign calls write_register_bytes, which writes it. */
2569 /* It may not be absolutely necessary to specify the PC value for
2570 restarting, but to be safe we use the value that gdb considers
2571 to be current. One case where this might be necessary is if the
2572 user explicitly changes the PC value that gdb considers to be
2573 current. FIXME: Investigate if this is necessary or not. */
2575 #ifdef PRSVADDR_BROKEN
2576 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2577 place to put nPC. In fact, if you use this, nPC seems to be set to some
2578 random garbage. We have to rely on the fact that PC and nPC have been
2579 written previously via PIOCSREG during a register flush. */
2581 pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
2582 pi->prrun.pr_flags != PRSVADDR;
2586 if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
2587 /* When attaching to a child process, if we forced it to stop with
2588 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2589 Upon resuming the first time after such a stop, we explicitly
2590 inhibit sending it another SIGSTOP, which would be the normal
2591 result of default signal handling. One potential drawback to
2592 this is that we will also ignore any attempt to by the user
2593 to explicitly continue after the attach with a SIGSTOP. Ultimately
2594 this problem should be dealt with by making the routines that
2595 deal with the inferior a little smarter, and possibly even allow
2596 an inferior to continue running at the same time as gdb. (FIXME?) */
2598 else if (signo == TARGET_SIGNAL_TSTP
2599 && pi->prstatus.pr_cursig == SIGTSTP
2600 && pi->prstatus.pr_action.sa_handler == SIG_DFL)
2602 /* We are about to pass the inferior a SIGTSTP whose action is
2603 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
2604 (notifying the parent via wait()), and then keep going from the
2605 same place when the parent is ready for you to keep going. So
2606 under the debugger, it should do nothing (as if the program had
2607 been stopped and then later resumed. Under ptrace, this
2608 happens for us, but under /proc, the system obligingly stops
2609 the process, and wait_for_inferior would have no way of
2610 distinguishing that type of stop (which indicates that we
2611 should just start it again), with a stop due to the pr_trace
2612 field of the prrun_t struct.
2614 Note that if the SIGTSTP is being caught, we *do* need to pass it,
2615 because the handler needs to get executed. */
2618 signal_to_pass = target_signal_to_host (signo);
2622 set_proc_siginfo (pi, signal_to_pass);
2626 pi->prrun.pr_flags |= PRCSIG;
2628 pi->nopass_next_sigstop = 0;
2631 pi->prrun.pr_flags |= PRSTEP;
2633 if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
2635 perror_with_name (pi->pathname);
2641 /* Continue all the other threads that haven't had an event of
2645 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2647 if (pi != procinfo && !procinfo->had_event)
2649 procinfo->prrun.pr_flags &= PRSTEP;
2650 procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
2651 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2652 if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
2654 if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
2656 fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
2658 print_sys_errmsg (procinfo->pathname, errno);
2659 error ("PIOCRUN failed");
2661 ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
2670 procfs_fetch_registers -- fetch current registers from inferior
2674 void procfs_fetch_registers (int regno)
2678 Read the current values of the inferior's registers, both the
2679 general register set and floating point registers (if supported)
2680 and update gdb's idea of their current values.
2685 procfs_fetch_registers (regno)
2688 struct procinfo *pi;
2690 pi = current_procinfo;
2692 if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
2694 supply_gregset (&pi->gregset);
2696 #if defined (FP0_REGNUM)
2697 if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
2699 supply_fpregset (&pi->fpregset);
2708 proc_init_failed - called whenever /proc access initialization
2713 static void proc_init_failed (struct procinfo *pi, char *why)
2717 This function is called whenever initialization of access to a /proc
2718 entry fails. It prints a suitable error message, does some cleanup,
2719 and then invokes the standard error processing routine which dumps
2720 us back into the command loop.
2724 proc_init_failed (pi, why)
2725 struct procinfo *pi;
2728 print_sys_errmsg (pi->pathname, errno);
2729 kill (pi->pid, SIGKILL);
2730 close_proc_file (pi);
2739 close_proc_file - close any currently open /proc entry
2743 static void close_proc_file (struct procinfo *pip)
2747 Close any currently open /proc entry and mark the process information
2748 entry as invalid. In order to ensure that we don't try to reuse any
2749 stale information, the pid, fd, and pathnames are explicitly
2750 invalidated, which may be overkill.
2755 close_proc_file (pip)
2756 struct procinfo *pip;
2758 struct procinfo *procinfo;
2760 remove_fd (pip); /* Remove fd from poll/select list */
2764 free (pip -> pathname);
2766 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
2768 if (procinfo_list == pip)
2769 procinfo_list = pip->next;
2771 for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
2772 if (procinfo->next == pip)
2773 procinfo->next = pip->next;
2782 open_proc_file - open a /proc entry for a given process id
2786 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2790 Given a process id and a mode, close the existing open /proc
2791 entry (if any) and open one for the new process id, in the
2792 specified mode. Once it is open, then mark the local process
2793 information structure as valid, which guarantees that the pid,
2794 fd, and pathname fields match an open /proc entry. Returns
2795 zero if the open fails, nonzero otherwise.
2797 Note that the pathname is left intact, even when the open fails,
2798 so that callers can use it to construct meaningful error messages
2799 rather than just "file open failed".
2803 open_proc_file (pid, pip, mode)
2805 struct procinfo *pip;
2809 pip -> had_event = 0;
2810 pip -> pathname = xmalloc (32);
2813 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2814 if ((pip -> fd = open (pip -> pathname, mode)) < 0)
2821 mappingflags (flags)
2824 static char asciiflags[8];
2826 strcpy (asciiflags, "-------");
2827 #if defined (MA_PHYS)
2828 if (flags & MA_PHYS) asciiflags[0] = 'd';
2830 if (flags & MA_STACK) asciiflags[1] = 's';
2831 if (flags & MA_BREAK) asciiflags[2] = 'b';
2832 if (flags & MA_SHARED) asciiflags[3] = 's';
2833 if (flags & MA_READ) asciiflags[4] = 'r';
2834 if (flags & MA_WRITE) asciiflags[5] = 'w';
2835 if (flags & MA_EXEC) asciiflags[6] = 'x';
2836 return (asciiflags);
2840 info_proc_flags (pip, summary)
2841 struct procinfo *pip;
2844 struct trans *transp;
2846 printf_filtered ("%-32s", "Process status flags:");
2849 printf_filtered ("\n\n");
2851 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2853 if (pip -> prstatus.pr_flags & transp -> value)
2857 printf_filtered ("%s ", transp -> name);
2861 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2865 printf_filtered ("\n");
2869 info_proc_stop (pip, summary)
2870 struct procinfo *pip;
2873 struct trans *transp;
2877 why = pip -> prstatus.pr_why;
2878 what = pip -> prstatus.pr_what;
2880 if (pip -> prstatus.pr_flags & PR_STOPPED)
2882 printf_filtered ("%-32s", "Reason for stopping:");
2885 printf_filtered ("\n\n");
2887 for (transp = pr_why_table; transp -> name != NULL; transp++)
2889 if (why == transp -> value)
2893 printf_filtered ("%s ", transp -> name);
2897 printf_filtered ("\t%-16s %s.\n",
2898 transp -> name, transp -> desc);
2904 /* Use the pr_why field to determine what the pr_what field means, and
2905 print more information. */
2910 /* pr_what is unused for this case */
2916 printf_filtered ("%s ", signalname (what));
2920 printf_filtered ("\t%-16s %s.\n", signalname (what),
2921 safe_strsignal (what));
2927 printf_filtered ("%s ", syscallname (what));
2931 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2932 "Entered this system call");
2938 printf_filtered ("%s ", syscallname (what));
2942 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2943 "Returned from this system call");
2949 printf_filtered ("%s ",
2950 lookupname (faults_table, what, "fault"));
2954 printf_filtered ("\t%-16s %s.\n",
2955 lookupname (faults_table, what, "fault"),
2956 lookupdesc (faults_table, what));
2960 printf_filtered ("\n");
2965 info_proc_siginfo (pip, summary)
2966 struct procinfo *pip;
2969 struct siginfo *sip;
2971 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2972 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2973 pip -> prstatus.pr_why == PR_FAULTED))
2975 printf_filtered ("%-32s", "Additional signal/fault info:");
2976 sip = &pip -> prstatus.pr_info;
2979 printf_filtered ("%s ", signalname (sip -> si_signo));
2980 if (sip -> si_errno > 0)
2982 printf_filtered ("%s ", errnoname (sip -> si_errno));
2984 if (sip -> si_code <= 0)
2986 printf_filtered ("sent by %s, uid %d ",
2987 target_pid_to_str (sip -> si_pid),
2992 printf_filtered ("%s ", sigcodename (sip));
2993 if ((sip -> si_signo == SIGILL) ||
2994 (sip -> si_signo == SIGFPE) ||
2995 (sip -> si_signo == SIGSEGV) ||
2996 (sip -> si_signo == SIGBUS))
2998 printf_filtered ("addr=%#lx ",
2999 (unsigned long) sip -> si_addr);
3001 else if ((sip -> si_signo == SIGCHLD))
3003 printf_filtered ("child %s, status %u ",
3004 target_pid_to_str (sip -> si_pid),
3007 else if ((sip -> si_signo == SIGPOLL))
3009 printf_filtered ("band %u ", sip -> si_band);
3015 printf_filtered ("\n\n");
3016 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
3017 safe_strsignal (sip -> si_signo));
3018 if (sip -> si_errno > 0)
3020 printf_filtered ("\t%-16s %s.\n",
3021 errnoname (sip -> si_errno),
3022 safe_strerror (sip -> si_errno));
3024 if (sip -> si_code <= 0)
3026 printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
3027 "PID of process sending signal");
3028 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
3029 "UID of process sending signal");
3033 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
3035 if ((sip -> si_signo == SIGILL) ||
3036 (sip -> si_signo == SIGFPE))
3038 printf_filtered ("\t%#-16lx %s.\n",
3039 (unsigned long) sip -> si_addr,
3040 "Address of faulting instruction");
3042 else if ((sip -> si_signo == SIGSEGV) ||
3043 (sip -> si_signo == SIGBUS))
3045 printf_filtered ("\t%#-16lx %s.\n",
3046 (unsigned long) sip -> si_addr,
3047 "Address of faulting memory reference");
3049 else if ((sip -> si_signo == SIGCHLD))
3051 printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
3052 "Child process ID");
3053 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
3054 "Child process exit value or signal");
3056 else if ((sip -> si_signo == SIGPOLL))
3058 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
3059 "Band event for POLL_{IN,OUT,MSG}");
3063 printf_filtered ("\n");
3068 info_proc_syscalls (pip, summary)
3069 struct procinfo *pip;
3077 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
3078 if (pip -> prstatus.pr_flags & PR_ASLEEP)
3080 int syscallnum = pip -> prstatus.pr_reg[R_D0];
3083 printf_filtered ("%-32s", "Sleeping in system call:");
3084 printf_filtered ("%s", syscallname (syscallnum));
3088 printf_filtered ("Sleeping in system call '%s'.\n",
3089 syscallname (syscallnum));
3094 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
3096 print_sys_errmsg (pip -> pathname, errno);
3097 error ("PIOCGENTRY failed");
3100 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
3102 print_sys_errmsg (pip -> pathname, errno);
3103 error ("PIOCGEXIT failed");
3106 printf_filtered ("System call tracing information:\n\n");
3108 printf_filtered ("\t%-12s %-8s %-8s\n",
3112 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
3115 if (syscall_table[syscallnum] != NULL)
3117 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
3118 printf_filtered ("%-8s ",
3119 prismember (&pip -> entryset, syscallnum)
3121 printf_filtered ("%-8s ",
3122 prismember (&pip -> exitset, syscallnum)
3124 printf_filtered ("\n");
3127 printf_filtered ("\n");
3136 static char locbuf[32];
3138 name = strsigno (signo);
3141 sprintf (locbuf, "Signal %d", signo);
3145 sprintf (locbuf, "%s (%d)", name, signo);
3155 static char locbuf[32];
3157 name = strerrno (errnum);
3160 sprintf (locbuf, "Errno %d", errnum);
3164 sprintf (locbuf, "%s (%d)", name, errnum);
3170 info_proc_signals (pip, summary)
3171 struct procinfo *pip;
3178 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
3180 print_sys_errmsg (pip -> pathname, errno);
3181 error ("PIOCGTRACE failed");
3184 printf_filtered ("Disposition of signals:\n\n");
3185 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
3186 "Signal", "Trace", "Hold", "Pending", "Description");
3187 for (signo = 0; signo < NSIG; signo++)
3190 printf_filtered ("\t%-15s ", signalname (signo));
3191 printf_filtered ("%-8s ",
3192 prismember (&pip -> trace, signo)
3194 printf_filtered ("%-8s ",
3195 prismember (&pip -> prstatus.pr_sighold, signo)
3198 #ifdef PROCFS_SIGPEND_OFFSET
3199 /* Alpha OSF/1 numbers the pending signals from 1. */
3200 printf_filtered ("%-8s ",
3201 (signo ? prismember (&pip -> prstatus.pr_sigpend,
3206 printf_filtered ("%-8s ",
3207 prismember (&pip -> prstatus.pr_sigpend, signo)
3210 printf_filtered (" %s\n", safe_strsignal (signo));
3212 printf_filtered ("\n");
3217 info_proc_faults (pip, summary)
3218 struct procinfo *pip;
3221 struct trans *transp;
3225 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
3227 print_sys_errmsg (pip -> pathname, errno);
3228 error ("PIOCGFAULT failed");
3231 printf_filtered ("Current traced hardware fault set:\n\n");
3232 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
3234 for (transp = faults_table; transp -> name != NULL; transp++)
3237 printf_filtered ("\t%-12s ", transp -> name);
3238 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
3240 printf_filtered ("\n");
3242 printf_filtered ("\n");
3247 info_proc_mappings (pip, summary)
3248 struct procinfo *pip;
3252 struct prmap *prmaps;
3253 struct prmap *prmap;
3257 printf_filtered ("Mapped address spaces:\n\n");
3258 #ifdef BFD_HOST_64_BIT
3259 printf_filtered (" %18s %18s %10s %10s %7s\n",
3261 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
3268 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
3270 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
3271 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
3273 for (prmap = prmaps; prmap -> pr_size; ++prmap)
3275 #ifdef BFD_HOST_64_BIT
3276 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
3278 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
3280 (unsigned long)prmap -> pr_vaddr,
3281 (unsigned long)prmap -> pr_vaddr
3282 + prmap -> pr_size - 1,
3285 mappingflags (prmap -> pr_mflags));
3289 printf_filtered ("\n");
3297 info_proc -- implement the "info proc" command
3301 void info_proc (char *args, int from_tty)
3305 Implement gdb's "info proc" command by using the /proc interface
3306 to print status information about any currently running process.
3308 Examples of the use of "info proc" are:
3310 info proc (prints summary info for current inferior)
3311 info proc 123 (prints summary info for process with pid 123)
3312 info proc mappings (prints address mappings)
3313 info proc times (prints process/children times)
3314 info proc id (prints pid, ppid, gid, sid, etc)
3315 FIXME: i proc id not implemented.
3316 info proc status (prints general process state info)
3317 FIXME: i proc status not implemented.
3318 info proc signals (prints info about signal handling)
3319 info proc all (prints all info)
3324 info_proc (args, from_tty)
3329 struct procinfo *pip;
3330 struct cleanup *old_chain;
3344 old_chain = make_cleanup (null_cleanup, 0);
3346 /* Default to using the current inferior if no pid specified. Note
3347 that inferior_pid may be 0, hence we set okerr. */
3349 pip = find_procinfo (inferior_pid, 1);
3353 if ((argv = buildargv (args)) == NULL)
3357 make_cleanup (freeargv, (char *) argv);
3359 while (*argv != NULL)
3361 argsize = strlen (*argv);
3362 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
3367 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
3372 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
3377 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
3382 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
3387 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
3392 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
3397 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
3402 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
3407 else if ((pid = atoi (*argv)) > 0)
3409 pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
3410 memset (pip, 0, sizeof (*pip));
3413 if (!open_proc_file (pid, pip, O_RDONLY))
3415 perror_with_name (pip -> pathname);
3418 make_cleanup (close_proc_file, pip);
3420 else if (**argv != '\000')
3422 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
3428 /* If we don't have a valid open process at this point, then we have no
3429 inferior or didn't specify a specific pid. */
3434 No process. Start debugging a program or specify an explicit process ID.");
3436 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
3438 print_sys_errmsg (pip -> pathname, errno);
3439 error ("PIOCSTATUS failed");
3442 /* Print verbose information of the requested type(s), or just a summary
3443 of the information for all types. */
3445 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
3446 if (summary || all || flags)
3448 info_proc_flags (pip, summary);
3452 info_proc_stop (pip, summary);
3454 if (summary || all || signals || faults)
3456 info_proc_siginfo (pip, summary);
3458 if (summary || all || syscalls)
3460 info_proc_syscalls (pip, summary);
3462 if (summary || all || mappings)
3464 info_proc_mappings (pip, summary);
3466 if (summary || all || signals)
3468 info_proc_signals (pip, summary);
3470 if (summary || all || faults)
3472 info_proc_faults (pip, summary);
3474 printf_filtered ("\n");
3476 /* All done, deal with closing any temporary process info structure,
3477 freeing temporary memory , etc. */
3479 do_cleanups (old_chain);
3486 procfs_set_sproc_trap -- arrange for child to stop on sproc().
3490 void procfs_set_sproc_trap (struct procinfo *)
3494 This function sets up a trap on sproc system call exits so that we can
3495 detect the arrival of a new thread. We are called with the new thread
3496 stopped prior to it's first instruction.
3498 Also note that we turn on the inherit-on-fork flag in the child process
3499 so that any grand-children start with all tracing flags set.
3505 procfs_set_sproc_trap (pi)
3506 struct procinfo *pi;
3510 if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
3512 print_sys_errmsg (pi->pathname, errno);
3513 error ("PIOCGEXIT failed");
3516 praddset (&exitset, SYS_sproc);
3518 /* We trap on fork() and vfork() in order to disable debugging in our grand-
3519 children and descendant processes. At this time, GDB can only handle
3520 threads (multiple processes, one address space). forks (and execs) result
3521 in the creation of multiple address spaces, which GDB can't handle yet. */
3523 praddset (&exitset, SYS_fork);
3525 praddset (&exitset, SYS_vfork);
3528 if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
3530 print_sys_errmsg (pi->pathname, errno);
3531 error ("PIOCSEXIT failed");
3534 /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
3535 tracing flags set. */
3537 #ifdef PIOCSET /* New method */
3541 ioctl (pi->fd, PIOCSET, &pr_flags);
3544 #ifdef PIOCSFORK /* Original method */
3545 ioctl (pi->fd, PIOCSFORK, NULL);
3549 #endif /* SYS_sproc */
3551 /* Fork an inferior process, and start debugging it with /proc. */
3554 procfs_create_inferior (exec_file, allargs, env)
3559 char *shell_file = getenv ("SHELL");
3561 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
3564 /* We will be looking down the PATH to find shell_file. If we
3565 just do this the normal way (via execlp, which operates by
3566 attempting an exec for each element of the PATH until it
3567 finds one which succeeds), then there will be an exec for
3568 each failed attempt, each of which will cause a PR_SYSEXIT
3569 stop, and we won't know how to distinguish the PR_SYSEXIT's
3570 for these failed execs with the ones for successful execs
3571 (whether the exec has succeeded is stored at that time in the
3572 carry bit or some such architecture-specific and
3573 non-ABI-specified place).
3575 So I can't think of anything better than to search the PATH
3576 now. This has several disadvantages: (1) There is a race
3577 condition; if we find a file now and it is deleted before we
3578 exec it, we lose, even if the deletion leaves a valid file
3579 further down in the PATH, (2) there is no way to know exactly
3580 what an executable (in the sense of "capable of being
3581 exec'd") file is. Using access() loses because it may lose
3582 if the caller is the superuser; failing to use it loses if
3583 there are ACLs or some such. */
3587 /* FIXME-maybe: might want "set path" command so user can change what
3588 path is used from within GDB. */
3589 char *path = getenv ("PATH");
3591 struct stat statbuf;
3594 path = "/bin:/usr/bin";
3596 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
3597 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
3599 p1 = strchr (p, ':');
3604 strncpy (tryname, p, len);
3605 tryname[len] = '\0';
3606 strcat (tryname, "/");
3607 strcat (tryname, shell_file);
3608 if (access (tryname, X_OK) < 0)
3610 if (stat (tryname, &statbuf) < 0)
3612 if (!S_ISREG (statbuf.st_mode))
3613 /* We certainly need to reject directories. I'm not quite
3614 as sure about FIFOs, sockets, etc., but I kind of doubt
3615 that people want to exec() these things. */
3620 /* Not found. This must be an error rather than merely passing
3621 the file to execlp(), because execlp() would try all the
3622 exec()s, causing GDB to get confused. */
3623 error ("Can't find shell %s in PATH", shell_file);
3625 shell_file = tryname;
3628 fork_inferior (exec_file, allargs, env,
3629 proc_set_exec_trap, procfs_init_inferior, shell_file);
3631 /* We are at the first instruction we care about. */
3632 /* Pedal to the metal... */
3634 /* Setup traps on exit from sproc() */
3637 procfs_set_sproc_trap (current_procinfo);
3640 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
3643 /* Clean up after the inferior dies. */
3646 procfs_mourn_inferior ()
3648 struct procinfo *pi;
3649 struct procinfo *next_pi;
3651 for (pi = procinfo_list; pi; pi = next_pi)
3654 unconditionally_kill_inferior (pi);
3657 unpush_target (&procfs_ops);
3658 generic_mourn_inferior ();
3662 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
3668 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
3670 /* Insert a watchpoint */
3672 procfs_set_watchpoint(pid, addr, len, rw)
3678 struct procinfo *pi;
3681 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3682 wpt.pr_vaddr = (caddr_t)addr;
3684 wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
3685 if (ioctl (pi->fd, PIOCSWATCH, &wpt) < 0)
3689 /* Currently it sometimes happens that the same watchpoint gets
3690 deleted twice - don't die in this case (FIXME please) */
3691 if (errno == ESRCH && len == 0)
3693 print_sys_errmsg (pi->pathname, errno);
3694 error ("PIOCSWATCH failed");
3700 procfs_stopped_by_watchpoint(pid)
3703 struct procinfo *pi;
3707 pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
3708 if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
3710 why = pi->prstatus.pr_why;
3711 what = pi->prstatus.pr_what;
3712 if (why == PR_FAULTED
3713 #if defined (FLTWATCH) && defined (FLTKWATCH)
3714 && (what == FLTWATCH) || (what == FLTKWATCH)
3717 && (what == FLTWATCH)
3720 && (what == FLTKWATCH)
3730 /* Send a SIGINT to the process group. This acts just like the user typed a
3731 ^C on the controlling terminal.
3733 XXX - This may not be correct for all systems. Some may want to use
3734 killpg() instead of kill (-pgrp). */
3739 extern pid_t inferior_process_group;
3741 kill (-inferior_process_group, SIGINT);
3745 struct target_ops procfs_ops = {
3746 "procfs", /* to_shortname */
3747 "Unix /proc child process", /* to_longname */
3748 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
3749 procfs_open, /* to_open */
3751 procfs_attach, /* to_attach */
3752 procfs_detach, /* to_detach */
3753 procfs_resume, /* to_resume */
3754 procfs_wait, /* to_wait */
3755 procfs_fetch_registers, /* to_fetch_registers */
3756 procfs_store_registers, /* to_store_registers */
3757 procfs_prepare_to_store, /* to_prepare_to_store */
3758 procfs_xfer_memory, /* to_xfer_memory */
3759 procfs_files_info, /* to_files_info */
3760 memory_insert_breakpoint, /* to_insert_breakpoint */
3761 memory_remove_breakpoint, /* to_remove_breakpoint */
3762 terminal_init_inferior, /* to_terminal_init */
3763 terminal_inferior, /* to_terminal_inferior */
3764 terminal_ours_for_output, /* to_terminal_ours_for_output */
3765 terminal_ours, /* to_terminal_ours */
3766 child_terminal_info, /* to_terminal_info */
3767 procfs_kill_inferior, /* to_kill */
3769 0, /* to_lookup_symbol */
3770 procfs_create_inferior, /* to_create_inferior */
3771 procfs_mourn_inferior, /* to_mourn_inferior */
3772 procfs_can_run, /* to_can_run */
3773 procfs_notice_signals, /* to_notice_signals */
3774 0, /* to_thread_alive */
3775 procfs_stop, /* to_stop */
3776 process_stratum, /* to_stratum */
3778 1, /* to_has_all_memory */
3779 1, /* to_has_memory */
3780 1, /* to_has_stack */
3781 1, /* to_has_registers */
3782 1, /* to_has_execution */
3784 0, /* sections_end */
3785 OPS_MAGIC /* to_magic */
3789 _initialize_procfs ()
3791 #ifdef HAVE_OPTIONAL_PROC_FS
3795 /* If we have an optional /proc filesystem (e.g. under OSF/1),
3796 don't add procfs support if we cannot access the running
3798 sprintf (procname, PROC_NAME_FMT, getpid ());
3799 if ((fd = open (procname, O_RDONLY)) < 0)
3804 add_target (&procfs_ops);
3806 add_info ("proc", info_proc,
3807 "Show process status information using /proc entry.\n\
3808 Specify process id or use current inferior by default.\n\
3809 Specify keywords for detailed information; default is summary.\n\
3810 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
3811 `status', `syscalls', and `times'.\n\
3812 Unambiguous abbreviations may be used.");
3814 init_syscall_table ();