1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 For information on the details of using /proc consult section proc(4)
25 in the UNIX System V Release 4 System Administrator's Reference Manual.
27 The general register and floating point register sets are manipulated by
28 separate ioctl's. This file makes the assumption that if FP0_REGNUM is
29 defined, then support for the floating point register set is desired,
30 regardless of whether or not the actual target has floating point hardware.
37 #ifdef USE_PROC_FS /* Entire file goes away if not using /proc */
40 #include <sys/procfs.h>
49 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
52 #define PROC_NAME_FMT "/proc/%05d"
55 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
56 CORE_ADDR kernel_u_addr;
59 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
61 #define si_pid _data._proc.pid
63 #define si_uid _data._proc._pdata._kill.uid
64 #endif /* BROKEN_SIGINFO_H */
66 /* All access to the inferior, either one started by gdb or one that has
67 been attached to, is controlled by an instance of a procinfo structure,
68 defined below. Since gdb currently only handles one inferior at a time,
69 the procinfo structure for the inferior is statically allocated and
70 only one exists at any given time. There is a separate procinfo
71 structure for use by the "info proc" command, so that we can print
72 useful information about any random process without interfering with
73 the inferior's procinfo information. */
76 int valid; /* Nonzero if pid, fd, & pathname are valid */
77 int pid; /* Process ID of inferior */
78 int fd; /* File descriptor for /proc entry */
79 char *pathname; /* Pathname to /proc entry */
80 int was_stopped; /* Nonzero if was stopped prior to attach */
81 int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
82 prrun_t prrun; /* Control state when it is run */
83 prstatus_t prstatus; /* Current process status info */
84 gregset_t gregset; /* General register set */
85 fpregset_t fpregset; /* Floating point register set */
86 fltset_t fltset; /* Current traced hardware fault set */
87 sigset_t trace; /* Current traced signal set */
88 sysset_t exitset; /* Current traced system call exit set */
89 sysset_t entryset; /* Current traced system call entry set */
90 fltset_t saved_fltset; /* Saved traced hardware fault set */
91 sigset_t saved_trace; /* Saved traced signal set */
92 sigset_t saved_sighold; /* Saved held signal set */
93 sysset_t saved_exitset; /* Saved traced system call exit set */
94 sysset_t saved_entryset; /* Saved traced system call entry set */
97 static struct procinfo pi; /* Inferior's process information */
99 /* Much of the information used in the /proc interface, particularly for
100 printing status information, is kept as tables of structures of the
101 following form. These tables can be used to map numeric values to
102 their symbolic names and to a string that describes their specific use. */
105 int value; /* The numeric value */
106 char *name; /* The equivalent symbolic value */
107 char *desc; /* Short description of value */
110 /* Translate bits in the pr_flags member of the prstatus structure, into the
111 names and desc information. */
113 static struct trans pr_flag_table[] =
115 #if defined (PR_STOPPED)
116 PR_STOPPED, "PR_STOPPED", "Process is stopped",
118 #if defined (PR_ISTOP)
119 PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
121 #if defined (PR_DSTOP)
122 PR_DSTOP, "PR_DSTOP", "A stop directive is in effect",
124 #if defined (PR_ASLEEP)
125 PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call",
127 #if defined (PR_FORK)
128 PR_FORK, "PR_FORK", "Inherit-on-fork is in effect",
131 PR_RLC, "PR_RLC", "Run-on-last-close is in effect",
133 #if defined (PR_PTRACE)
134 PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace",
136 #if defined (PR_PCINVAL)
137 PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address",
139 #if defined (PR_ISSYS)
140 PR_ISSYS, "PR_ISSYS", "Is a system process",
142 #if defined (PR_STEP)
143 PR_STEP, "PR_STEP", "Process has single step pending",
146 PR_KLC, "PR_KLC", "Kill-on-last-close is in effect",
148 #if defined (PR_ASYNC)
149 PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect",
151 #if defined (PR_PCOMPAT)
152 PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
157 /* Translate values in the pr_why field of the prstatus struct. */
159 static struct trans pr_why_table[] =
161 #if defined (PR_REQUESTED)
162 PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
164 #if defined (PR_SIGNALLED)
165 PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal",
167 #if defined (PR_FAULTED)
168 PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault",
170 #if defined (PR_SYSENTRY)
171 PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
173 #if defined (PR_SYSEXIT)
174 PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call",
176 #if defined (PR_JOBCONTROL)
177 PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action",
179 #if defined (PR_SUSPENDED)
180 PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
185 /* Hardware fault translation table. */
187 static struct trans faults_table[] =
190 FLTILL, "FLTILL", "Illegal instruction",
192 #if defined (FLTPRIV)
193 FLTPRIV, "FLTPRIV", "Privileged instruction",
196 FLTBPT, "FLTBPT", "Breakpoint trap",
198 #if defined (FLTTRACE)
199 FLTTRACE, "FLTTRACE", "Trace trap",
201 #if defined (FLTACCESS)
202 FLTACCESS, "FLTACCESS", "Memory access fault",
204 #if defined (FLTBOUNDS)
205 FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
207 #if defined (FLTIOVF)
208 FLTIOVF, "FLTIOVF", "Integer overflow",
210 #if defined (FLTIZDIV)
211 FLTIZDIV, "FLTIZDIV", "Integer zero divide",
214 FLTFPE, "FLTFPE", "Floating-point exception",
216 #if defined (FLTSTACK)
217 FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
219 #if defined (FLTPAGE)
220 FLTPAGE, "FLTPAGE", "Recoverable page fault",
225 /* Translation table for signal generation information. See UNIX System
226 V Release 4 Programmer's Reference Manual, siginfo(5). */
228 static struct sigcode {
233 } siginfo_table[] = {
234 #if defined (SIGILL) && defined (ILL_ILLOPC)
235 SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
237 #if defined (SIGILL) && defined (ILL_ILLOPN)
238 SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
240 #if defined (SIGILL) && defined (ILL_ILLADR)
241 SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
243 #if defined (SIGILL) && defined (ILL_ILLTRP)
244 SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
246 #if defined (SIGILL) && defined (ILL_PRVOPC)
247 SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
249 #if defined (SIGILL) && defined (ILL_PRVREG)
250 SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
252 #if defined (SIGILL) && defined (ILL_COPROC)
253 SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
255 #if defined (SIGILL) && defined (ILL_BADSTK)
256 SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
258 #if defined (SIGFPE) && defined (FPE_INTDIV)
259 SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
261 #if defined (SIGFPE) && defined (FPE_INTOVF)
262 SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
264 #if defined (SIGFPE) && defined (FPE_FLTDIV)
265 SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
267 #if defined (SIGFPE) && defined (FPE_FLTOVF)
268 SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow",
270 #if defined (SIGFPE) && defined (FPE_FLTUND)
271 SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
273 #if defined (SIGFPE) && defined (FPE_FLTRES)
274 SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
276 #if defined (SIGFPE) && defined (FPE_FLTINV)
277 SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation",
279 #if defined (SIGFPE) && defined (FPE_FLTSUB)
280 SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range",
282 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
283 SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object",
285 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
286 SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object",
288 #if defined (SIGBUS) && defined (BUS_ADRALN)
289 SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
291 #if defined (SIGBUS) && defined (BUS_ADRERR)
292 SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
294 #if defined (SIGBUS) && defined (BUS_OBJERR)
295 SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error",
297 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
298 SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
300 #if defined (SIGTRAP) && defined (TRAP_TRACE)
301 SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
303 #if defined (SIGCLD) && defined (CLD_EXITED)
304 SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
306 #if defined (SIGCLD) && defined (CLD_KILLED)
307 SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed",
309 #if defined (SIGCLD) && defined (CLD_DUMPED)
310 SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally",
312 #if defined (SIGCLD) && defined (CLD_TRAPPED)
313 SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped",
315 #if defined (SIGCLD) && defined (CLD_STOPPED)
316 SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped",
318 #if defined (SIGCLD) && defined (CLD_CONTINUED)
319 SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued",
321 #if defined (SIGPOLL) && defined (POLL_IN)
322 SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
324 #if defined (SIGPOLL) && defined (POLL_OUT)
325 SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
327 #if defined (SIGPOLL) && defined (POLL_MSG)
328 SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
330 #if defined (SIGPOLL) && defined (POLL_ERR)
331 SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
333 #if defined (SIGPOLL) && defined (POLL_PRI)
334 SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
336 #if defined (SIGPOLL) && defined (POLL_HUP)
337 SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
342 static char *syscall_table[MAX_SYSCALLS];
344 /* Prototypes for local functions */
347 set_proc_siginfo PARAMS ((struct procinfo *, int));
350 init_syscall_table PARAMS ((void));
353 syscallname PARAMS ((int));
356 signalname PARAMS ((int));
359 errnoname PARAMS ((int));
362 proc_address_to_fd PARAMS ((CORE_ADDR, int));
365 open_proc_file PARAMS ((int, struct procinfo *, int));
368 close_proc_file PARAMS ((struct procinfo *));
371 unconditionally_kill_inferior PARAMS ((void));
374 proc_init_failed PARAMS ((char *));
377 info_proc PARAMS ((char *, int));
380 info_proc_flags PARAMS ((struct procinfo *, int));
383 info_proc_stop PARAMS ((struct procinfo *, int));
386 info_proc_siginfo PARAMS ((struct procinfo *, int));
389 info_proc_syscalls PARAMS ((struct procinfo *, int));
392 info_proc_mappings PARAMS ((struct procinfo *, int));
395 info_proc_signals PARAMS ((struct procinfo *, int));
398 info_proc_faults PARAMS ((struct procinfo *, int));
401 mappingflags PARAMS ((long));
404 lookupname PARAMS ((struct trans *, unsigned int, char *));
407 lookupdesc PARAMS ((struct trans *, unsigned int));
409 /* External function prototypes that can't be easily included in any
410 header file because the args are typedefs in system include files. */
413 supply_gregset PARAMS ((gregset_t *));
416 fill_gregset PARAMS ((gregset_t *, int));
419 supply_fpregset PARAMS ((fpregset_t *));
422 fill_fpregset PARAMS ((fpregset_t *, int));
428 lookupdesc -- translate a value to a summary desc string
432 static char *lookupdesc (struct trans *transp, unsigned int val);
436 Given a pointer to a translation table and a value to be translated,
437 lookup the desc string and return it.
441 lookupdesc (transp, val)
442 struct trans *transp;
447 for (desc = NULL; transp -> name != NULL; transp++)
449 if (transp -> value == val)
451 desc = transp -> desc;
456 /* Didn't find a translation for the specified value, set a default one. */
469 lookupname -- translate a value to symbolic name
473 static char *lookupname (struct trans *transp, unsigned int val,
478 Given a pointer to a translation table, a value to be translated,
479 and a default prefix to return if the value can't be translated,
480 match the value with one of the translation table entries and
481 return a pointer to the symbolic name.
483 If no match is found it just returns the value as a printable string,
484 with the given prefix. The previous such value, if any, is freed
489 lookupname (transp, val, prefix)
490 struct trans *transp;
497 for (name = NULL; transp -> name != NULL; transp++)
499 if (transp -> value == val)
501 name = transp -> name;
506 /* Didn't find a translation for the specified value, build a default
507 one using the specified prefix and return it. The lifetime of
508 the value is only until the next one is needed. */
516 locbuf = xmalloc (strlen (prefix) + 16);
517 sprintf (locbuf, "%s %u", prefix, val);
529 static char locbuf[32];
531 for (scp = siginfo_table; scp -> codename != NULL; scp++)
533 if ((scp -> signo == sip -> si_signo) &&
534 (scp -> code == sip -> si_code))
536 name = scp -> codename;
542 sprintf (locbuf, "sigcode %u", sip -> si_signo);
548 static char *sigcodedesc (sip)
554 for (scp = siginfo_table; scp -> codename != NULL; scp++)
556 if ((scp -> signo == sip -> si_signo) &&
557 (scp -> code == sip -> si_code))
565 desc = "Unrecognized signal or trap use";
574 syscallname - translate a system call number into a system call name
578 char *syscallname (int syscallnum)
582 Given a system call number, translate it into the printable name
583 of a system call, or into "syscall <num>" if it is an unknown
588 syscallname (syscallnum)
591 static char locbuf[32];
594 if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
596 rtnval = syscall_table[syscallnum];
600 sprintf (locbuf, "syscall %u", syscallnum);
610 init_syscall_table - initialize syscall translation table
614 void init_syscall_table (void)
618 Dynamically initialize the translation table to convert system
619 call numbers into printable system call names. Done once per
620 gdb run, on initialization.
624 This is awfully ugly, but preprocessor tricks to make it prettier
625 tend to be nonportable.
629 init_syscall_table ()
631 #if defined (SYS_exit)
632 syscall_table[SYS_exit] = "exit";
634 #if defined (SYS_fork)
635 syscall_table[SYS_fork] = "fork";
637 #if defined (SYS_read)
638 syscall_table[SYS_read] = "read";
640 #if defined (SYS_write)
641 syscall_table[SYS_write] = "write";
643 #if defined (SYS_open)
644 syscall_table[SYS_open] = "open";
646 #if defined (SYS_close)
647 syscall_table[SYS_close] = "close";
649 #if defined (SYS_wait)
650 syscall_table[SYS_wait] = "wait";
652 #if defined (SYS_creat)
653 syscall_table[SYS_creat] = "creat";
655 #if defined (SYS_link)
656 syscall_table[SYS_link] = "link";
658 #if defined (SYS_unlink)
659 syscall_table[SYS_unlink] = "unlink";
661 #if defined (SYS_exec)
662 syscall_table[SYS_exec] = "exec";
664 #if defined (SYS_execv)
665 syscall_table[SYS_execv] = "execv";
667 #if defined (SYS_execve)
668 syscall_table[SYS_execve] = "execve";
670 #if defined (SYS_chdir)
671 syscall_table[SYS_chdir] = "chdir";
673 #if defined (SYS_time)
674 syscall_table[SYS_time] = "time";
676 #if defined (SYS_mknod)
677 syscall_table[SYS_mknod] = "mknod";
679 #if defined (SYS_chmod)
680 syscall_table[SYS_chmod] = "chmod";
682 #if defined (SYS_chown)
683 syscall_table[SYS_chown] = "chown";
685 #if defined (SYS_brk)
686 syscall_table[SYS_brk] = "brk";
688 #if defined (SYS_stat)
689 syscall_table[SYS_stat] = "stat";
691 #if defined (SYS_lseek)
692 syscall_table[SYS_lseek] = "lseek";
694 #if defined (SYS_getpid)
695 syscall_table[SYS_getpid] = "getpid";
697 #if defined (SYS_mount)
698 syscall_table[SYS_mount] = "mount";
700 #if defined (SYS_umount)
701 syscall_table[SYS_umount] = "umount";
703 #if defined (SYS_setuid)
704 syscall_table[SYS_setuid] = "setuid";
706 #if defined (SYS_getuid)
707 syscall_table[SYS_getuid] = "getuid";
709 #if defined (SYS_stime)
710 syscall_table[SYS_stime] = "stime";
712 #if defined (SYS_ptrace)
713 syscall_table[SYS_ptrace] = "ptrace";
715 #if defined (SYS_alarm)
716 syscall_table[SYS_alarm] = "alarm";
718 #if defined (SYS_fstat)
719 syscall_table[SYS_fstat] = "fstat";
721 #if defined (SYS_pause)
722 syscall_table[SYS_pause] = "pause";
724 #if defined (SYS_utime)
725 syscall_table[SYS_utime] = "utime";
727 #if defined (SYS_stty)
728 syscall_table[SYS_stty] = "stty";
730 #if defined (SYS_gtty)
731 syscall_table[SYS_gtty] = "gtty";
733 #if defined (SYS_access)
734 syscall_table[SYS_access] = "access";
736 #if defined (SYS_nice)
737 syscall_table[SYS_nice] = "nice";
739 #if defined (SYS_statfs)
740 syscall_table[SYS_statfs] = "statfs";
742 #if defined (SYS_sync)
743 syscall_table[SYS_sync] = "sync";
745 #if defined (SYS_kill)
746 syscall_table[SYS_kill] = "kill";
748 #if defined (SYS_fstatfs)
749 syscall_table[SYS_fstatfs] = "fstatfs";
751 #if defined (SYS_pgrpsys)
752 syscall_table[SYS_pgrpsys] = "pgrpsys";
754 #if defined (SYS_xenix)
755 syscall_table[SYS_xenix] = "xenix";
757 #if defined (SYS_dup)
758 syscall_table[SYS_dup] = "dup";
760 #if defined (SYS_pipe)
761 syscall_table[SYS_pipe] = "pipe";
763 #if defined (SYS_times)
764 syscall_table[SYS_times] = "times";
766 #if defined (SYS_profil)
767 syscall_table[SYS_profil] = "profil";
769 #if defined (SYS_plock)
770 syscall_table[SYS_plock] = "plock";
772 #if defined (SYS_setgid)
773 syscall_table[SYS_setgid] = "setgid";
775 #if defined (SYS_getgid)
776 syscall_table[SYS_getgid] = "getgid";
778 #if defined (SYS_signal)
779 syscall_table[SYS_signal] = "signal";
781 #if defined (SYS_msgsys)
782 syscall_table[SYS_msgsys] = "msgsys";
784 #if defined (SYS_sys3b)
785 syscall_table[SYS_sys3b] = "sys3b";
787 #if defined (SYS_acct)
788 syscall_table[SYS_acct] = "acct";
790 #if defined (SYS_shmsys)
791 syscall_table[SYS_shmsys] = "shmsys";
793 #if defined (SYS_semsys)
794 syscall_table[SYS_semsys] = "semsys";
796 #if defined (SYS_ioctl)
797 syscall_table[SYS_ioctl] = "ioctl";
799 #if defined (SYS_uadmin)
800 syscall_table[SYS_uadmin] = "uadmin";
802 #if defined (SYS_utssys)
803 syscall_table[SYS_utssys] = "utssys";
805 #if defined (SYS_fsync)
806 syscall_table[SYS_fsync] = "fsync";
808 #if defined (SYS_umask)
809 syscall_table[SYS_umask] = "umask";
811 #if defined (SYS_chroot)
812 syscall_table[SYS_chroot] = "chroot";
814 #if defined (SYS_fcntl)
815 syscall_table[SYS_fcntl] = "fcntl";
817 #if defined (SYS_ulimit)
818 syscall_table[SYS_ulimit] = "ulimit";
820 #if defined (SYS_rfsys)
821 syscall_table[SYS_rfsys] = "rfsys";
823 #if defined (SYS_rmdir)
824 syscall_table[SYS_rmdir] = "rmdir";
826 #if defined (SYS_mkdir)
827 syscall_table[SYS_mkdir] = "mkdir";
829 #if defined (SYS_getdents)
830 syscall_table[SYS_getdents] = "getdents";
832 #if defined (SYS_sysfs)
833 syscall_table[SYS_sysfs] = "sysfs";
835 #if defined (SYS_getmsg)
836 syscall_table[SYS_getmsg] = "getmsg";
838 #if defined (SYS_putmsg)
839 syscall_table[SYS_putmsg] = "putmsg";
841 #if defined (SYS_poll)
842 syscall_table[SYS_poll] = "poll";
844 #if defined (SYS_lstat)
845 syscall_table[SYS_lstat] = "lstat";
847 #if defined (SYS_symlink)
848 syscall_table[SYS_symlink] = "symlink";
850 #if defined (SYS_readlink)
851 syscall_table[SYS_readlink] = "readlink";
853 #if defined (SYS_setgroups)
854 syscall_table[SYS_setgroups] = "setgroups";
856 #if defined (SYS_getgroups)
857 syscall_table[SYS_getgroups] = "getgroups";
859 #if defined (SYS_fchmod)
860 syscall_table[SYS_fchmod] = "fchmod";
862 #if defined (SYS_fchown)
863 syscall_table[SYS_fchown] = "fchown";
865 #if defined (SYS_sigprocmask)
866 syscall_table[SYS_sigprocmask] = "sigprocmask";
868 #if defined (SYS_sigsuspend)
869 syscall_table[SYS_sigsuspend] = "sigsuspend";
871 #if defined (SYS_sigaltstack)
872 syscall_table[SYS_sigaltstack] = "sigaltstack";
874 #if defined (SYS_sigaction)
875 syscall_table[SYS_sigaction] = "sigaction";
877 #if defined (SYS_sigpending)
878 syscall_table[SYS_sigpending] = "sigpending";
880 #if defined (SYS_context)
881 syscall_table[SYS_context] = "context";
883 #if defined (SYS_evsys)
884 syscall_table[SYS_evsys] = "evsys";
886 #if defined (SYS_evtrapret)
887 syscall_table[SYS_evtrapret] = "evtrapret";
889 #if defined (SYS_statvfs)
890 syscall_table[SYS_statvfs] = "statvfs";
892 #if defined (SYS_fstatvfs)
893 syscall_table[SYS_fstatvfs] = "fstatvfs";
895 #if defined (SYS_nfssys)
896 syscall_table[SYS_nfssys] = "nfssys";
898 #if defined (SYS_waitsys)
899 syscall_table[SYS_waitsys] = "waitsys";
901 #if defined (SYS_sigsendsys)
902 syscall_table[SYS_sigsendsys] = "sigsendsys";
904 #if defined (SYS_hrtsys)
905 syscall_table[SYS_hrtsys] = "hrtsys";
907 #if defined (SYS_acancel)
908 syscall_table[SYS_acancel] = "acancel";
910 #if defined (SYS_async)
911 syscall_table[SYS_async] = "async";
913 #if defined (SYS_priocntlsys)
914 syscall_table[SYS_priocntlsys] = "priocntlsys";
916 #if defined (SYS_pathconf)
917 syscall_table[SYS_pathconf] = "pathconf";
919 #if defined (SYS_mincore)
920 syscall_table[SYS_mincore] = "mincore";
922 #if defined (SYS_mmap)
923 syscall_table[SYS_mmap] = "mmap";
925 #if defined (SYS_mprotect)
926 syscall_table[SYS_mprotect] = "mprotect";
928 #if defined (SYS_munmap)
929 syscall_table[SYS_munmap] = "munmap";
931 #if defined (SYS_fpathconf)
932 syscall_table[SYS_fpathconf] = "fpathconf";
934 #if defined (SYS_vfork)
935 syscall_table[SYS_vfork] = "vfork";
937 #if defined (SYS_fchdir)
938 syscall_table[SYS_fchdir] = "fchdir";
940 #if defined (SYS_readv)
941 syscall_table[SYS_readv] = "readv";
943 #if defined (SYS_writev)
944 syscall_table[SYS_writev] = "writev";
946 #if defined (SYS_xstat)
947 syscall_table[SYS_xstat] = "xstat";
949 #if defined (SYS_lxstat)
950 syscall_table[SYS_lxstat] = "lxstat";
952 #if defined (SYS_fxstat)
953 syscall_table[SYS_fxstat] = "fxstat";
955 #if defined (SYS_xmknod)
956 syscall_table[SYS_xmknod] = "xmknod";
958 #if defined (SYS_clocal)
959 syscall_table[SYS_clocal] = "clocal";
961 #if defined (SYS_setrlimit)
962 syscall_table[SYS_setrlimit] = "setrlimit";
964 #if defined (SYS_getrlimit)
965 syscall_table[SYS_getrlimit] = "getrlimit";
967 #if defined (SYS_lchown)
968 syscall_table[SYS_lchown] = "lchown";
970 #if defined (SYS_memcntl)
971 syscall_table[SYS_memcntl] = "memcntl";
973 #if defined (SYS_getpmsg)
974 syscall_table[SYS_getpmsg] = "getpmsg";
976 #if defined (SYS_putpmsg)
977 syscall_table[SYS_putpmsg] = "putpmsg";
979 #if defined (SYS_rename)
980 syscall_table[SYS_rename] = "rename";
982 #if defined (SYS_uname)
983 syscall_table[SYS_uname] = "uname";
985 #if defined (SYS_setegid)
986 syscall_table[SYS_setegid] = "setegid";
988 #if defined (SYS_sysconfig)
989 syscall_table[SYS_sysconfig] = "sysconfig";
991 #if defined (SYS_adjtime)
992 syscall_table[SYS_adjtime] = "adjtime";
994 #if defined (SYS_systeminfo)
995 syscall_table[SYS_systeminfo] = "systeminfo";
997 #if defined (SYS_seteuid)
998 syscall_table[SYS_seteuid] = "seteuid";
1006 ptrace -- override library version to force errors for /proc version
1010 int ptrace (int request, int pid, PTRACE_ARG3_TYPE arg3, int arg4)
1014 When gdb is configured to use /proc, it should not be calling
1015 or otherwise attempting to use ptrace. In order to catch errors
1016 where use of /proc is configured, but some routine is still calling
1017 ptrace, we provide a local version of a function with that name
1018 that does nothing but issue an error message.
1022 ptrace (request, pid, arg3, arg4)
1025 PTRACE_ARG3_TYPE arg3;
1028 error ("internal error - there is a call to ptrace() somewhere");
1036 kill_inferior_fast -- kill inferior while gdb is exiting
1040 void kill_inferior_fast (void)
1044 This is used when GDB is exiting. It gives less chance of error.
1048 Don't attempt to kill attached inferiors since we may be called
1049 when gdb is in the process of aborting, and killing the attached
1050 inferior may be very anti-social. This is particularly true if we
1051 were attached just so we could use the /proc facilities to get
1052 detailed information about it's status.
1057 kill_inferior_fast ()
1059 if (inferior_pid != 0 && !attach_flag)
1061 unconditionally_kill_inferior ();
1069 kill_inferior - kill any currently inferior
1073 void kill_inferior (void)
1077 Kill any current inferior.
1081 Kills even attached inferiors. Presumably the user has already
1082 been prompted that the inferior is an attached one rather than
1083 one started by gdb. (FIXME?)
1090 if (inferior_pid != 0)
1092 unconditionally_kill_inferior ();
1093 target_mourn_inferior ();
1101 unconditionally_kill_inferior - terminate the inferior
1105 static void unconditionally_kill_inferior (void)
1109 Kill the current inferior. Should not be called until it
1110 is at least tested that there is an inferior.
1114 A possibly useful enhancement would be to first try sending
1115 the inferior a terminate signal, politely asking it to commit
1116 suicide, before we murder it.
1121 unconditionally_kill_inferior ()
1126 ioctl (pi.fd, PIOCKILL, &signo);
1127 close_proc_file (&pi);
1135 child_xfer_memory -- copy data to or from inferior memory space
1139 int child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1140 int dowrite, struct target_ops target)
1144 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1145 from/to debugger memory starting at MYADDR. Copy from inferior
1146 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1148 Returns the length copied, which is either the LEN argument or
1149 zero. This xfer function does not do partial moves, since child_ops
1150 doesn't allow memory operations to cross below us in the target stack
1155 The /proc interface makes this an almost trivial task.
1160 child_xfer_memory (memaddr, myaddr, len, dowrite, target)
1165 struct target_ops *target; /* ignored */
1169 if (lseek (pi.fd, (off_t) memaddr, 0) == (off_t) memaddr)
1173 nbytes = write (pi.fd, myaddr, len);
1177 nbytes = read (pi.fd, myaddr, len);
1191 store_inferior_registers -- copy register values back to inferior
1195 void store_inferior_registers (int regno)
1199 Store our current register values back into the inferior. If
1200 REGNO is -1 then store all the register, otherwise store just
1201 the value specified by REGNO.
1205 If we are storing only a single register, we first have to get all
1206 the current values from the process, overwrite the desired register
1207 in the gregset with the one we want from gdb's registers, and then
1208 send the whole set back to the process. For writing all the
1209 registers, all we have to do is generate the gregset and send it to
1212 Also note that the process has to be stopped on an event of interest
1213 for this to work, which basically means that it has to have been
1214 run under the control of one of the other /proc ioctl calls and not
1215 ptrace. Since we don't use ptrace anyway, we don't worry about this
1216 fine point, but it is worth noting for future reference.
1218 Gdb is confused about what this function is supposed to return.
1219 Some versions return a value, others return nothing. Some are
1220 declared to return a value and actually return nothing. Gdb ignores
1221 anything returned. (FIXME)
1226 store_inferior_registers (regno)
1231 ioctl (pi.fd, PIOCGREG, &pi.gregset);
1233 fill_gregset (&pi.gregset, regno);
1234 ioctl (pi.fd, PIOCSREG, &pi.gregset);
1236 #if defined (FP0_REGNUM)
1238 /* Now repeat everything using the floating point register set, if the
1239 target has floating point hardware. Since we ignore the returned value,
1240 we'll never know whether it worked or not anyway. */
1244 ioctl (pi.fd, PIOCGFPREG, &pi.fpregset);
1246 fill_fpregset (&pi.fpregset, regno);
1247 ioctl (pi.fd, PIOCSFPREG, &pi.fpregset);
1249 #endif /* FP0_REGNUM */
1257 inferior_proc_init - initialize access to a /proc entry
1261 void inferior_proc_init (int pid)
1265 When gdb starts an inferior, this function is called in the parent
1266 process immediately after the fork. It waits for the child to stop
1267 on the return from the exec system call (the child itself takes care
1268 of ensuring that this is set up), then sets up the set of signals
1269 and faults that are to be traced.
1273 If proc_init_failed ever gets called, control returns to the command
1274 processing loop via the standard error handling code.
1279 inferior_proc_init (pid)
1282 if (!open_proc_file (pid, &pi, O_RDWR))
1284 proc_init_failed ("can't open process file");
1288 memset ((char *) &pi.prrun, 0, sizeof (pi.prrun));
1289 prfillset (&pi.prrun.pr_trace);
1290 proc_signal_handling_change ();
1291 prfillset (&pi.prrun.pr_fault);
1292 prdelset (&pi.prrun.pr_fault, FLTPAGE);
1293 if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
1295 proc_init_failed ("PIOCWSTOP failed");
1297 else if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault) < 0)
1299 proc_init_failed ("PIOCSFAULT failed");
1308 proc_signal_handling_change
1312 void proc_signal_handling_change (void);
1316 When the user changes the state of gdb's signal handling via the
1317 "handle" command, this function gets called to see if any change
1318 in the /proc interface is required. It is also called internally
1319 by other /proc interface functions to initialize the state of
1320 the traced signal set.
1322 One thing it does is that signals for which the state is "nostop",
1323 "noprint", and "pass", have their trace bits reset in the pr_trace
1324 field, so that they are no longer traced. This allows them to be
1325 delivered directly to the inferior without the debugger ever being
1330 proc_signal_handling_change ()
1336 for (signo = 0; signo < NSIG; signo++)
1338 if (signal_stop_state (signo) == 0 &&
1339 signal_print_state (signo) == 0 &&
1340 signal_pass_state (signo) == 1)
1342 prdelset (&pi.prrun.pr_trace, signo);
1346 praddset (&pi.prrun.pr_trace, signo);
1349 if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
1351 print_sys_errmsg ("PIOCSTRACE failed", errno);
1360 proc_set_exec_trap -- arrange for exec'd child to halt at startup
1364 void proc_set_exec_trap (void)
1368 This function is called in the child process when starting up
1369 an inferior, prior to doing the exec of the actual inferior.
1370 It sets the child process's exitset to make exit from the exec
1371 system call an event of interest to stop on, and then simply
1372 returns. The child does the exec, the system call returns, and
1373 the child stops at the first instruction, ready for the gdb
1374 parent process to take control of it.
1378 We need to use all local variables since the child may be sharing
1379 it's data space with the parent, if vfork was used rather than
1382 Also note that we want to turn off the inherit-on-fork flag in
1383 the child process so that any grand-children start with all
1384 tracing flags cleared.
1388 proc_set_exec_trap ()
1391 auto char procname[32];
1394 sprintf (procname, PROC_NAME_FMT, getpid ());
1395 if ((fd = open (procname, O_RDWR)) < 0)
1401 premptyset (&exitset);
1404 Not all systems with /proc have all the exec* syscalls with the same
1405 names. On the SGI, for example, there is no SYS_exec, but there
1406 *is* a SYS_execv. So, we try to account for that. */
1409 praddset (&exitset, SYS_exec);
1412 praddset (&exitset, SYS_execve);
1415 praddset(&exitset, SYS_execv);
1418 if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1425 /* Turn off inherit-on-fork flag so that all grand-children of gdb
1426 start with tracing flags cleared. */
1428 #if defined (PIOCRESET) /* New method */
1432 ioctl (fd, PIOCRESET, &pr_flags);
1435 #if defined (PIOCRFORK) /* Original method */
1436 ioctl (fd, PIOCRFORK, NULL);
1440 /* Turn on run-on-last-close flag so that this process will not hang
1441 if GDB goes away for some reason. */
1443 #if defined (PIOCSET) /* New method */
1447 (void) ioctl (fd, PIOCSET, &pr_flags);
1450 #if defined (PIOCSRLC) /* Original method */
1451 (void) ioctl (fd, PIOCSRLC, 0);
1460 proc_iterate_over_mappings -- call function for every mapped space
1464 int proc_iterate_over_mappings (int (*func)())
1468 Given a pointer to a function, call that function for every
1469 mapped address space, passing it an open file descriptor for
1470 the file corresponding to that mapped address space (if any)
1471 and the base address of the mapped space. Quit when we hit
1472 the end of the mappings or the function returns nonzero.
1476 proc_iterate_over_mappings (func)
1477 int (*func) PARAMS ((int, CORE_ADDR));
1482 struct prmap *prmaps;
1483 struct prmap *prmap;
1485 if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
1487 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1488 if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
1490 for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1492 fd = proc_address_to_fd ((CORE_ADDR) prmap -> pr_vaddr, 0);
1493 funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1505 proc_base_address -- find base address for segment containing address
1509 CORE_ADDR proc_base_address (CORE_ADDR addr)
1513 Given an address of a location in the inferior, find and return
1514 the base address of the mapped segment containing that address.
1516 This is used for example, by the shared library support code,
1517 where we have the pc value for some location in the shared library
1518 where we are stopped, and need to know the base address of the
1519 segment containing that address.
1523 #if 0 /* Currently unused */
1526 proc_base_address (addr)
1530 struct prmap *prmaps;
1531 struct prmap *prmap;
1532 CORE_ADDR baseaddr = 0;
1534 if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
1536 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1537 if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
1539 for (prmap = prmaps; prmap -> pr_size; ++prmap)
1541 if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1542 (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1544 baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1559 proc_address_to_fd -- return open fd for file mapped to address
1563 int proc_address_to_fd (CORE_ADDR addr, complain)
1567 Given an address in the current inferior's address space, use the
1568 /proc interface to find an open file descriptor for the file that
1569 this address was mapped in from. Return -1 if there is no current
1570 inferior. Print a warning message if there is an inferior but
1571 the address corresponds to no file (IE a bogus address).
1576 proc_address_to_fd (addr, complain)
1584 if ((fd = ioctl (pi.fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1588 print_sys_errmsg (pi.pathname, errno);
1589 warning ("can't find mapped file for address 0x%x", addr);
1597 #ifdef ATTACH_DETACH
1603 attach -- attach to an already existing process
1607 int attach (int pid)
1611 Attach to an already existing process with the specified process
1612 id. If the process is not already stopped, query whether to
1617 The option of stopping at attach time is specific to the /proc
1618 versions of gdb. Versions using ptrace force the attachee
1619 to stop. (I have changed this version to do so, too. All you
1630 if (!open_proc_file (pid, &pi, O_RDWR))
1632 perror_with_name (pi.pathname);
1636 /* Get current status of process and if it is not already stopped,
1637 then stop it. Remember whether or not it was stopped when we first
1640 if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1642 print_sys_errmsg (pi.pathname, errno);
1643 close_proc_file (&pi);
1644 error ("PIOCSTATUS failed");
1646 if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1653 if (1 || query ("Process is currently running, stop it? "))
1655 /* Make it run again when we close it. */
1656 #if defined (PIOCSET) /* New method */
1660 result = ioctl (pi.fd, PIOCSET, &pr_flags);
1663 #if defined (PIOCSRLC) /* Original method */
1664 result = ioctl (pi.fd, PIOCSRLC, 0);
1669 print_sys_errmsg (pi.pathname, errno);
1670 close_proc_file (&pi);
1671 error ("PIOCSRLC or PIOCSET failed");
1673 if (ioctl (pi.fd, PIOCSTOP, &pi.prstatus) < 0)
1675 print_sys_errmsg (pi.pathname, errno);
1676 close_proc_file (&pi);
1677 error ("PIOCSTOP failed");
1679 pi.nopass_next_sigstop = 1;
1683 printf ("Ok, gdb will wait for process %u to stop.\n", pid);
1687 /* Remember some things about the inferior that we will, or might, change
1688 so that we can restore them when we detach. */
1690 ioctl (pi.fd, PIOCGTRACE, &pi.saved_trace);
1691 ioctl (pi.fd, PIOCGHOLD, &pi.saved_sighold);
1692 ioctl (pi.fd, PIOCGFAULT, &pi.saved_fltset);
1693 ioctl (pi.fd, PIOCGENTRY, &pi.saved_entryset);
1694 ioctl (pi.fd, PIOCGEXIT, &pi.saved_exitset);
1696 /* Set up trace and fault sets, as gdb expects them. */
1698 memset (&pi.prrun, 0, sizeof (pi.prrun));
1699 prfillset (&pi.prrun.pr_trace);
1700 proc_signal_handling_change ();
1701 prfillset (&pi.prrun.pr_fault);
1702 prdelset (&pi.prrun.pr_fault, FLTPAGE);
1703 if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault))
1705 print_sys_errmsg ("PIOCSFAULT failed", errno);
1707 if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
1709 print_sys_errmsg ("PIOCSTRACE failed", errno);
1719 detach -- detach from an attached-to process
1723 void detach (int signal)
1727 Detach from the current attachee.
1729 If signal is non-zero, the attachee is started running again and sent
1730 the specified signal.
1732 If signal is zero and the attachee was not already stopped when we
1733 attached to it, then we make it runnable again when we detach.
1735 Otherwise, we query whether or not to make the attachee runnable
1736 again, since we may simply want to leave it in the state it was in
1739 We report any problems, but do not consider them errors, since we
1740 MUST detach even if some things don't seem to go right. This may not
1741 be the ideal situation. (FIXME).
1752 set_proc_siginfo (&pi, signal);
1754 if (ioctl (pi.fd, PIOCSEXIT, &pi.saved_exitset) < 0)
1756 print_sys_errmsg (pi.pathname, errno);
1757 printf ("PIOCSEXIT failed.\n");
1759 if (ioctl (pi.fd, PIOCSENTRY, &pi.saved_entryset) < 0)
1761 print_sys_errmsg (pi.pathname, errno);
1762 printf ("PIOCSENTRY failed.\n");
1764 if (ioctl (pi.fd, PIOCSTRACE, &pi.saved_trace) < 0)
1766 print_sys_errmsg (pi.pathname, errno);
1767 printf ("PIOCSTRACE failed.\n");
1769 if (ioctl (pi.fd, PIOCSHOLD, &pi.saved_sighold) < 0)
1771 print_sys_errmsg (pi.pathname, errno);
1772 printf ("PIOSCHOLD failed.\n");
1774 if (ioctl (pi.fd, PIOCSFAULT, &pi.saved_fltset) < 0)
1776 print_sys_errmsg (pi.pathname, errno);
1777 printf ("PIOCSFAULT failed.\n");
1779 if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1781 print_sys_errmsg (pi.pathname, errno);
1782 printf ("PIOCSTATUS failed.\n");
1786 if (signal || (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
1788 if (signal || !pi.was_stopped ||
1789 query ("Was stopped when attached, make it runnable again? "))
1791 /* Clear any fault that might have stopped it. */
1792 if (ioctl (pi.fd, PIOCCFAULT, 0))
1794 print_sys_errmsg (pi.pathname, errno);
1795 printf ("PIOCCFAULT failed.\n");
1798 /* Make it run again when we close it. */
1799 #if defined (PIOCSET) /* New method */
1803 result = ioctl (pi.fd, PIOCSET, &pr_flags);
1806 #if defined (PIOCSRLC) /* Original method */
1807 result = ioctl (pi.fd, PIOCSRLC, 0);
1812 print_sys_errmsg (pi.pathname, errno);
1813 printf ("PIOCSRLC or PIOCSET failed.\n");
1818 close_proc_file (&pi);
1822 #endif /* ATTACH_DETACH */
1828 proc_wait -- emulate wait() as much as possible
1832 int proc_wait (int *statloc)
1836 Try to emulate wait() as much as possible. Not sure why we can't
1837 just use wait(), but it seems to have problems when applied to a
1838 process being controlled with the /proc interface.
1842 We have a race problem here with no obvious solution. We need to let
1843 the inferior run until it stops on an event of interest, which means
1844 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
1845 ioctl if the process is already stopped on something that is not an
1846 event of interest, or the call will hang indefinitely. Thus we first
1847 use PIOCSTATUS to see if the process is not stopped. If not, then we
1848 use PIOCWSTOP. But during the window between the two, if the process
1849 stops for any reason that is not an event of interest (such as a job
1850 control signal) then gdb will hang. One possible workaround is to set
1851 an alarm to wake up every minute of so and check to see if the process
1852 is still running, and if so, then reissue the PIOCWSTOP. But this is
1853 a real kludge, so has not been implemented. FIXME: investigate
1856 FIXME: Investigate why wait() seems to have problems with programs
1857 being control by /proc routines.
1871 if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1875 else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
1877 if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
1884 if (errno == ENOENT)
1886 rtnval = wait (&statval);
1887 if (rtnval != inferior_pid)
1889 print_sys_errmsg (pi.pathname, errno);
1890 error ("PIOCWSTOP, wait failed, returned %d", rtnval);
1896 print_sys_errmsg (pi.pathname, errno);
1897 error ("PIOCSTATUS or PIOCWSTOP failed.");
1901 else if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1903 rtnval = pi.prstatus.pr_pid;
1904 why = pi.prstatus.pr_why;
1905 what = pi.prstatus.pr_what;
1906 if (why == PR_SIGNALLED)
1908 statval = (what << 8) | 0177;
1910 else if ((why == PR_SYSEXIT)
1919 || what == SYS_execve
1922 || what == SYS_execv
1926 statval = (SIGTRAP << 8) | 0177;
1928 else if (why == PR_REQUESTED)
1930 statval = (SIGSTOP << 8) | 0177;
1932 else if (why == PR_JOBCONTROL)
1934 statval = (what << 8) | 0177;
1936 else if (why == PR_FAULTED)
1942 statval = (SIGILL << 8) | 0177;
1946 statval = (SIGTRAP << 8) | 0177;
1951 statval = (SIGSEGV << 8) | 0177;
1956 statval = (SIGFPE << 8) | 0177;
1958 case FLTPAGE: /* Recoverable page fault */
1961 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
1968 error ("PIOCWSTOP, unknown why %d, what %d", why, what);
1974 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
1975 pi.prstatus.pr_flags);
1989 set_proc_siginfo - set a process's current signal info
1993 void set_proc_siginfo (struct procinfo *pip, int signo);
1997 Given a pointer to a process info struct in PIP and a signal number
1998 in SIGNO, set the process's current signal and its associated signal
1999 information. The signal will be delivered to the process immediately
2000 after execution is resumed, even if it is being held. In addition,
2001 this particular delivery will not cause another PR_SIGNALLED stop
2002 even if the signal is being traced.
2004 If we are not delivering the same signal that the prstatus siginfo
2005 struct contains information about, then synthesize a siginfo struct
2006 to match the signal we are doing to deliver, make it of the type
2007 "generated by a user process", and send this synthesized copy. When
2008 used to set the inferior's signal state, this will be required if we
2009 are not currently stopped because of a traced signal, or if we decide
2010 to continue with a different signal.
2012 Note that when continuing the inferior from a stop due to receipt
2013 of a traced signal, we either have set PRCSIG to clear the existing
2014 signal, or we have to call this function to do a PIOCSSIG with either
2015 the existing siginfo struct from pr_info, or one we have synthesized
2016 appropriately for the signal we want to deliver. Otherwise if the
2017 signal is still being traced, the inferior will immediately stop
2020 See siginfo(5) for more details.
2024 set_proc_siginfo (pip, signo)
2025 struct procinfo *pip;
2028 struct siginfo newsiginfo;
2029 struct siginfo *sip;
2033 if (signo == pip -> prstatus.pr_info.si_signo)
2035 sip = &pip -> prstatus.pr_info;
2039 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
2041 sip -> si_signo = signo;
2043 sip -> si_errno = 0;
2044 sip -> si_pid = getpid ();
2045 sip -> si_uid = getuid ();
2047 if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
2049 print_sys_errmsg (pip -> pathname, errno);
2050 warning ("PIOCSSIG failed");
2059 child_resume -- resume execution of the inferior process
2063 void child_resume (int step, int signo)
2067 Resume execution of the inferior process. If STEP is nozero, then
2068 just single step it. If SIGNAL is nonzero, restart it with that
2073 It may not be absolutely necessary to specify the PC value for
2074 restarting, but to be safe we use the value that gdb considers
2075 to be current. One case where this might be necessary is if the
2076 user explicitly changes the PC value that gdb considers to be
2077 current. FIXME: Investigate if this is necessary or not.
2079 When attaching to a child process, if we forced it to stop with
2080 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2081 Upon resuming the first time after such a stop, we explicitly
2082 inhibit sending it another SIGSTOP, which would be the normal
2083 result of default signal handling. One potential drawback to
2084 this is that we will also ignore any attempt to by the user
2085 to explicitly continue after the attach with a SIGSTOP. Ultimately
2086 this problem should be dealt with by making the routines that
2087 deal with the inferior a little smarter, and possibly even allow
2088 an inferior to continue running at the same time as gdb. (FIXME?)
2092 child_resume (step, signo)
2097 pi.prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2099 #ifdef PRSVADDR_BROKEN
2100 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2101 place to put nPC. In fact, if you use this, nPC seems to be set to some
2102 random garbage. We have to rely on the fact that PC and nPC have been
2103 written previously via PIOCSREG during a register flush. */
2105 pi.prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
2106 pi.prrun.pr_flags != PRSVADDR;
2109 if (signo && !(signo == SIGSTOP && pi.nopass_next_sigstop))
2111 set_proc_siginfo (&pi, signo);
2115 pi.prrun.pr_flags |= PRCSIG;
2117 pi.nopass_next_sigstop = 0;
2120 pi.prrun.pr_flags |= PRSTEP;
2122 if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
2124 perror_with_name (pi.pathname);
2133 fetch_inferior_registers -- fetch current registers from inferior
2137 void fetch_inferior_registers (int regno)
2141 Read the current values of the inferior's registers, both the
2142 general register set and floating point registers (if supported)
2143 and update gdb's idea of their current values.
2148 fetch_inferior_registers (regno)
2151 if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
2153 supply_gregset (&pi.gregset);
2155 #if defined (FP0_REGNUM)
2156 if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
2158 supply_fpregset (&pi.fpregset);
2167 fetch_core_registers -- fetch current registers from core file data
2171 void fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
2172 int which, unsigned in reg_addr)
2176 Read the values of either the general register set (WHICH equals 0)
2177 or the floating point register set (WHICH equals 2) from the core
2178 file data (pointed to by CORE_REG_SECT), and update gdb's idea of
2179 their current values. The CORE_REG_SIZE parameter is ignored.
2183 Use the indicated sizes to validate the gregset and fpregset
2188 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
2189 char *core_reg_sect;
2190 unsigned core_reg_size;
2192 unsigned int reg_addr; /* Unused in this version */
2197 if (core_reg_size != sizeof (pi.gregset))
2199 warning ("wrong size gregset struct in core file");
2203 memcpy ((char *) &pi.gregset, core_reg_sect, sizeof (pi.gregset));
2204 supply_gregset (&pi.gregset);
2207 else if (which == 2)
2209 if (core_reg_size != sizeof (pi.fpregset))
2211 warning ("wrong size fpregset struct in core file");
2215 memcpy ((char *) &pi.fpregset, core_reg_sect, sizeof (pi.fpregset));
2216 #if defined (FP0_REGNUM)
2217 supply_fpregset (&pi.fpregset);
2227 proc_init_failed - called whenever /proc access initialization fails
2231 static void proc_init_failed (char *why)
2235 This function is called whenever initialization of access to a /proc
2236 entry fails. It prints a suitable error message, does some cleanup,
2237 and then invokes the standard error processing routine which dumps
2238 us back into the command loop.
2242 proc_init_failed (why)
2245 print_sys_errmsg (pi.pathname, errno);
2246 kill (pi.pid, SIGKILL);
2247 close_proc_file (&pi);
2256 close_proc_file - close any currently open /proc entry
2260 static void close_proc_file (struct procinfo *pip)
2264 Close any currently open /proc entry and mark the process information
2265 entry as invalid. In order to ensure that we don't try to reuse any
2266 stale information, the pid, fd, and pathnames are explicitly
2267 invalidated, which may be overkill.
2272 close_proc_file (pip)
2273 struct procinfo *pip;
2281 if (pip -> pathname)
2283 free (pip -> pathname);
2284 pip -> pathname = NULL;
2293 open_proc_file - open a /proc entry for a given process id
2297 static int open_proc_file (int pid, struct procinfo *pip, int mode)
2301 Given a process id and a mode, close the existing open /proc
2302 entry (if any) and open one for the new process id, in the
2303 specified mode. Once it is open, then mark the local process
2304 information structure as valid, which guarantees that the pid,
2305 fd, and pathname fields match an open /proc entry. Returns
2306 zero if the open fails, nonzero otherwise.
2308 Note that the pathname is left intact, even when the open fails,
2309 so that callers can use it to construct meaningful error messages
2310 rather than just "file open failed".
2314 open_proc_file (pid, pip, mode)
2316 struct procinfo *pip;
2319 pip -> valid = 0; /* FIXME, what is this? ?! */
2324 if (pip -> pathname == NULL)
2326 pip -> pathname = xmalloc (32);
2328 sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2329 if ((pip -> fd = open (pip -> pathname, mode)) >= 0)
2334 return (pip -> valid);
2338 mappingflags (flags)
2341 static char asciiflags[8];
2343 strcpy (asciiflags, "-------");
2344 #if defined (MA_PHYS)
2345 if (flags & MA_PHYS) asciiflags[0] = 'd';
2347 if (flags & MA_STACK) asciiflags[1] = 's';
2348 if (flags & MA_BREAK) asciiflags[2] = 'b';
2349 if (flags & MA_SHARED) asciiflags[3] = 's';
2350 if (flags & MA_READ) asciiflags[4] = 'r';
2351 if (flags & MA_WRITE) asciiflags[5] = 'w';
2352 if (flags & MA_EXEC) asciiflags[6] = 'x';
2353 return (asciiflags);
2357 info_proc_flags (pip, summary)
2358 struct procinfo *pip;
2361 struct trans *transp;
2363 printf_filtered ("%-32s", "Process status flags:");
2366 printf_filtered ("\n\n");
2368 for (transp = pr_flag_table; transp -> name != NULL; transp++)
2370 if (pip -> prstatus.pr_flags & transp -> value)
2374 printf_filtered ("%s ", transp -> name);
2378 printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2382 printf_filtered ("\n");
2386 info_proc_stop (pip, summary)
2387 struct procinfo *pip;
2390 struct trans *transp;
2394 why = pip -> prstatus.pr_why;
2395 what = pip -> prstatus.pr_what;
2397 if (pip -> prstatus.pr_flags & PR_STOPPED)
2399 printf_filtered ("%-32s", "Reason for stopping:");
2402 printf_filtered ("\n\n");
2404 for (transp = pr_why_table; transp -> name != NULL; transp++)
2406 if (why == transp -> value)
2410 printf_filtered ("%s ", transp -> name);
2414 printf_filtered ("\t%-16s %s.\n",
2415 transp -> name, transp -> desc);
2421 /* Use the pr_why field to determine what the pr_what field means, and
2422 print more information. */
2427 /* pr_what is unused for this case */
2433 printf_filtered ("%s ", signalname (what));
2437 printf_filtered ("\t%-16s %s.\n", signalname (what),
2438 safe_strsignal (what));
2444 printf_filtered ("%s ", syscallname (what));
2448 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2449 "Entered this system call");
2455 printf_filtered ("%s ", syscallname (what));
2459 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2460 "Returned from this system call");
2466 printf_filtered ("%s ",
2467 lookupname (faults_table, what, "fault"));
2471 printf_filtered ("\t%-16s %s.\n",
2472 lookupname (faults_table, what, "fault"),
2473 lookupdesc (faults_table, what));
2477 printf_filtered ("\n");
2482 info_proc_siginfo (pip, summary)
2483 struct procinfo *pip;
2486 struct siginfo *sip;
2488 if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2489 (pip -> prstatus.pr_why == PR_SIGNALLED ||
2490 pip -> prstatus.pr_why == PR_FAULTED))
2492 printf_filtered ("%-32s", "Additional signal/fault info:");
2493 sip = &pip -> prstatus.pr_info;
2496 printf_filtered ("%s ", signalname (sip -> si_signo));
2497 if (sip -> si_errno > 0)
2499 printf_filtered ("%s ", errnoname (sip -> si_errno));
2501 if (sip -> si_code <= 0)
2503 printf_filtered ("sent by pid %d, uid %d ", sip -> si_pid,
2508 printf_filtered ("%s ", sigcodename (sip));
2509 if ((sip -> si_signo == SIGILL) ||
2510 (sip -> si_signo == SIGFPE) ||
2511 (sip -> si_signo == SIGSEGV) ||
2512 (sip -> si_signo == SIGBUS))
2514 printf_filtered ("addr=%#x ", sip -> si_addr);
2516 else if ((sip -> si_signo == SIGCHLD))
2518 printf_filtered ("child pid %u, status %u ",
2522 else if ((sip -> si_signo == SIGPOLL))
2524 printf_filtered ("band %u ", sip -> si_band);
2530 printf_filtered ("\n\n");
2531 printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
2532 safe_strsignal (sip -> si_signo));
2533 if (sip -> si_errno > 0)
2535 printf_filtered ("\t%-16s %s.\n",
2536 errnoname (sip -> si_errno),
2537 safe_strerror (sip -> si_errno));
2539 if (sip -> si_code <= 0)
2541 printf_filtered ("\t%-16u %s\n", sip -> si_pid,
2542 "PID of process sending signal");
2543 printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2544 "UID of process sending signal");
2548 printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2550 if ((sip -> si_signo == SIGILL) ||
2551 (sip -> si_signo == SIGFPE))
2553 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2554 "Address of faulting instruction");
2556 else if ((sip -> si_signo == SIGSEGV) ||
2557 (sip -> si_signo == SIGBUS))
2559 printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2560 "Address of faulting memory reference");
2562 else if ((sip -> si_signo == SIGCHLD))
2564 printf_filtered ("\t%-16u %s.\n", sip -> si_pid,
2565 "Child process ID");
2566 printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2567 "Child process exit value or signal");
2569 else if ((sip -> si_signo == SIGPOLL))
2571 printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2572 "Band event for POLL_{IN,OUT,MSG}");
2576 printf_filtered ("\n");
2581 info_proc_syscalls (pip, summary)
2582 struct procinfo *pip;
2590 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
2591 if (pip -> prstatus.pr_flags & PR_ASLEEP)
2593 int syscallnum = pip -> prstatus.pr_reg[R_D0];
2596 printf_filtered ("%-32s", "Sleeping in system call:");
2597 printf_filtered ("%s", syscallname (syscallnum));
2601 printf_filtered ("Sleeping in system call '%s'.\n",
2602 syscallname (syscallnum));
2607 if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
2609 print_sys_errmsg (pip -> pathname, errno);
2610 error ("PIOCGENTRY failed");
2613 if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
2615 print_sys_errmsg (pip -> pathname, errno);
2616 error ("PIOCGEXIT failed");
2619 printf_filtered ("System call tracing information:\n\n");
2621 printf_filtered ("\t%-12s %-8s %-8s\n",
2625 for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
2628 if (syscall_table[syscallnum] != NULL)
2630 printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
2631 printf_filtered ("%-8s ",
2632 prismember (&pip -> entryset, syscallnum)
2634 printf_filtered ("%-8s ",
2635 prismember (&pip -> exitset, syscallnum)
2637 printf_filtered ("\n");
2640 printf_filtered ("\n");
2649 static char locbuf[32];
2651 name = strsigno (signo);
2654 sprintf (locbuf, "Signal %d", signo);
2658 sprintf (locbuf, "%s (%d)", name, signo);
2668 static char locbuf[32];
2670 name = strerrno (errnum);
2673 sprintf (locbuf, "Errno %d", errnum);
2677 sprintf (locbuf, "%s (%d)", name, errnum);
2683 info_proc_signals (pip, summary)
2684 struct procinfo *pip;
2691 if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
2693 print_sys_errmsg (pip -> pathname, errno);
2694 error ("PIOCGTRACE failed");
2697 printf_filtered ("Disposition of signals:\n\n");
2698 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
2699 "Signal", "Trace", "Hold", "Pending", "Description");
2700 for (signo = 0; signo < NSIG; signo++)
2703 printf_filtered ("\t%-15s ", signalname (signo));
2704 printf_filtered ("%-8s ",
2705 prismember (&pip -> trace, signo)
2707 printf_filtered ("%-8s ",
2708 prismember (&pip -> prstatus.pr_sighold, signo)
2710 printf_filtered ("%-8s ",
2711 prismember (&pip -> prstatus.pr_sigpend, signo)
2713 printf_filtered (" %s\n", safe_strsignal (signo));
2715 printf_filtered ("\n");
2720 info_proc_faults (pip, summary)
2721 struct procinfo *pip;
2724 struct trans *transp;
2728 if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
2730 print_sys_errmsg (pip -> pathname, errno);
2731 error ("PIOCGFAULT failed");
2734 printf_filtered ("Current traced hardware fault set:\n\n");
2735 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
2737 for (transp = faults_table; transp -> name != NULL; transp++)
2740 printf_filtered ("\t%-12s ", transp -> name);
2741 printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
2743 printf_filtered ("\n");
2745 printf_filtered ("\n");
2750 info_proc_mappings (pip, summary)
2751 struct procinfo *pip;
2755 struct prmap *prmaps;
2756 struct prmap *prmap;
2760 printf_filtered ("Mapped address spaces:\n\n");
2761 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
2767 if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
2769 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2770 if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
2772 for (prmap = prmaps; prmap -> pr_size; ++prmap)
2774 printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
2776 prmap -> pr_vaddr + prmap -> pr_size - 1,
2779 mappingflags (prmap -> pr_mflags));
2783 printf_filtered ("\n");
2791 info_proc -- implement the "info proc" command
2795 void info_proc (char *args, int from_tty)
2799 Implement gdb's "info proc" command by using the /proc interface
2800 to print status information about any currently running process.
2802 Examples of the use of "info proc" are:
2804 info proc (prints summary info for current inferior)
2805 info proc 123 (prints summary info for process with pid 123)
2806 info proc mappings (prints address mappings)
2807 info proc times (prints process/children times)
2808 info proc id (prints pid, ppid, gid, sid, etc)
2809 info proc status (prints general process state info)
2810 info proc signals (prints info about signal handling)
2811 info proc all (prints all info)
2816 info_proc (args, from_tty)
2821 struct procinfo pii;
2822 struct procinfo *pip;
2823 struct cleanup *old_chain;
2837 old_chain = make_cleanup (null_cleanup, 0);
2839 /* Default to using the current inferior if no pid specified */
2845 if ((argv = buildargv (args)) == NULL)
2849 make_cleanup (freeargv, (char *) argv);
2851 while (*argv != NULL)
2853 argsize = strlen (*argv);
2854 if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
2859 else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
2864 else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
2869 else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
2874 else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
2879 else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
2884 else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
2889 else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
2894 else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
2899 else if ((pii.pid = atoi (*argv)) > 0)
2903 memset (&pii, 0, sizeof (pii));
2904 if (!open_proc_file (pid, pip, O_RDONLY))
2906 perror_with_name (pip -> pathname);
2909 make_cleanup (close_proc_file, pip);
2911 else if (**argv != '\000')
2913 error ("Unrecognized or ambiguous keyword `%s'.", *argv);
2919 /* If we don't have a valid open process at this point, then we have no
2920 inferior or didn't specify a specific pid. */
2924 error ("No process. Run an inferior or specify an explicit pid.");
2926 if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
2928 print_sys_errmsg (pip -> pathname, errno);
2929 error ("PIOCSTATUS failed");
2932 /* Print verbose information of the requested type(s), or just a summary
2933 of the information for all types. */
2935 printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
2936 if (summary || all || flags)
2938 info_proc_flags (pip, summary);
2942 info_proc_stop (pip, summary);
2944 if (summary || all || signals || faults)
2946 info_proc_siginfo (pip, summary);
2948 if (summary || all || syscalls)
2950 info_proc_syscalls (pip, summary);
2952 if (summary || all || mappings)
2954 info_proc_mappings (pip, summary);
2956 if (summary || all || signals)
2958 info_proc_signals (pip, summary);
2960 if (summary || all || faults)
2962 info_proc_faults (pip, summary);
2964 printf_filtered ("\n");
2966 /* All done, deal with closing any temporary process info structure,
2967 freeing temporary memory , etc. */
2969 do_cleanups (old_chain);
2976 _initialize_proc_fs -- initialize the process file system stuff
2980 void _initialize_proc_fs (void)
2984 Do required initializations during gdb startup for using the
2985 /proc file system interface.
2989 static char *proc_desc =
2990 "Show process status information using /proc entry.\n\
2991 Specify process id or use current inferior by default.\n\
2992 Specify keywords for detailed information; default is summary.\n\
2993 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
2994 `status', `syscalls', and `times'.\n\
2995 Unambiguous abbreviations may be used.";
2998 _initialize_proc_fs ()
3000 add_info ("proc", info_proc, proc_desc);
3001 init_syscall_table ();
3004 #endif /* USE_PROC_FS */