1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992-97, 1998 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs
4 compatibility by Geoffrey Noer at Cygnus Solutions.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 For information on the details of using /proc consult section proc(4)
26 in the UNIX System V Release 4 System Administrator's Reference Manual.
28 The general register and floating point register sets are manipulated
29 separately. This file makes the assumption that if FP0_REGNUM is
30 defined, then support for the floating point register set is desired,
31 regardless of whether or not the actual target has floating point hardware.
38 #include <sys/types.h>
40 #include <sys/fault.h>
41 #include <sys/syscall.h>
42 #include <sys/procfs.h>
45 #include "gdb_string.h"
55 #include "gdbthread.h"
57 #if !defined(SYS_lwp_create) && defined(SYS_lwpcreate)
58 # define SYS_lwp_create SYS_lwpcreate
61 #if !defined(SYS_lwp_exit) && defined(SYS_lwpexit)
62 # define SYS_lwp_exit SYS_lwpexit
65 #if !defined(SYS_lwp_wait) && defined(SYS_lwpwait)
66 # define SYS_lwp_wait SYS_lwpwait
69 #if !defined(SYS_lwp_self) && defined(SYS_lwpself)
70 # define SYS_lwp_self SYS_lwpself
73 #if !defined(SYS_lwp_info) && defined(SYS_lwpinfo)
74 # define SYS_lwp_info SYS_lwpinfo
77 #if !defined(SYS_lwp_private) && defined(SYS_lwpprivate)
78 # define SYS_lwp_private SYS_lwpprivate
81 #if !defined(SYS_lwp_kill) && defined(SYS_lwpkill)
82 # define SYS_lwp_kill SYS_lwpkill
85 #if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend)
86 # define SYS_lwp_suspend SYS_lwpsuspend
89 #if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue)
90 # define SYS_lwp_continue SYS_lwpcontinue
93 /* the name of the proc status struct depends on the implementation */
95 typedef pstatus_t gdb_prstatus_t
;
97 typedef prstatus_t gdb_prstatus_t
;
100 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
102 /* proc name formats may vary depending on the proc implementation */
103 #ifdef HAVE_MULTIPLE_PROC_FDS
104 # ifndef CTL_PROC_NAME_FMT
105 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
106 # define AS_PROC_NAME_FMT "/proc/%d/as"
107 # define MAP_PROC_NAME_FMT "/proc/%d/map"
108 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
110 #else /* HAVE_MULTIPLE_PROC_FDS */
111 # ifndef CTL_PROC_NAME_FMT
112 # define CTL_PROC_NAME_FMT "/proc/%05d"
113 # define AS_PROC_NAME_FMT "/proc/%05d"
114 # define MAP_PROC_NAME_FMT "/proc/%05d"
115 # define STATUS_PROC_NAME_FMT "/proc/%05d"
117 #endif /* HAVE_MULTIPLE_PROC_FDS */
120 /* These #ifdefs are for sol2.x in particular. sol2.x has
121 both a "gregset_t" and a "prgregset_t", which have
122 similar uses but different layouts. sol2.x gdb tries to
123 use prgregset_t (and prfpregset_t) everywhere. */
125 #ifdef GDB_GREGSET_TYPE
126 typedef GDB_GREGSET_TYPE gdb_gregset_t
;
128 typedef gregset_t gdb_gregset_t
;
131 #ifdef GDB_FPREGSET_TYPE
132 typedef GDB_FPREGSET_TYPE gdb_fpregset_t
;
134 typedef fpregset_t gdb_fpregset_t
;
138 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
140 extern struct target_ops procfs_ops
; /* Forward declaration */
142 int procfs_suppress_run
= 0; /* Non-zero if procfs should pretend not to
143 be a runnable target. Used by targets
144 that can sit atop procfs, such as solaris
147 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
148 CORE_ADDR kernel_u_addr
;
151 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
153 #define si_pid _data._proc.pid
155 #define si_uid _data._proc._pdata._kill.uid
156 #endif /* BROKEN_SIGINFO_H */
158 /* Define structures for passing commands to /proc/pid/ctl file. Note that
159 while we create these for the PROCFS_USE_READ_WRITE world, we use them
160 and ignore the extra cmd int in other proc schemes.
162 /* generic ctl msg */
168 /* set general registers */
171 gdb_gregset_t gregset
;
174 /* set fp registers */
177 gdb_fpregset_t fpregset
;
180 /* set signals to be traced */
186 /* set faults to be traced */
192 /* set system calls to be traced */
198 /* set current signal to be traced */
204 /* All access to the inferior, either one started by gdb or one that has
205 been attached to, is controlled by an instance of a procinfo structure,
206 defined below. Since gdb currently only handles one inferior at a time,
207 the procinfo structure for the inferior is statically allocated and
208 only one exists at any given time. There is a separate procinfo
209 structure for use by the "info proc" command, so that we can print
210 useful information about any random process without interfering with
211 the inferior's procinfo information. */
214 struct procinfo
*next
;
215 int pid
; /* Process ID of inferior */
216 int ctl_fd
; /* File descriptor for /proc ctl file */
217 int status_fd
; /* File descriptor for /proc status file */
218 int as_fd
; /* File descriptor for /proc as file */
219 int map_fd
; /* File descriptor for /proc map file */
220 char *pathname
; /* Pathname to /proc entry */
221 int had_event
; /* poll/select says something happened */
222 int was_stopped
; /* Nonzero if was stopped prior to attach */
223 int nopass_next_sigstop
; /* Don't pass a sigstop on next resume */
224 #ifndef HAVE_NO_PRRUN_T
225 prrun_t prrun
; /* Control state when it is run */
227 gdb_prstatus_t prstatus
; /* Current process status info */
228 struct greg_ctl gregset
; /* General register set */
229 struct fpreg_ctl fpregset
; /* Floating point register set */
230 struct flt_ctl fltset
; /* Current traced hardware fault set */
231 struct sig_ctl trace
; /* Current traced signal set */
232 struct sys_ctl exitset
; /* Current traced system call exit set */
233 struct sys_ctl entryset
; /* Current traced system call entry set */
234 struct sig_ctl saved_sighold
; /* Saved held signal set */
235 struct flt_ctl saved_fltset
; /* Saved traced hardware fault set */
236 struct sig_ctl saved_trace
; /* Saved traced signal set */
237 struct sys_ctl saved_exitset
; /* Saved traced system call exit set */
238 struct sys_ctl saved_entryset
;/* Saved traced system call entry set */
239 int num_syscall_handlers
; /* Number of syscall trap handlers
240 currently installed */
241 /* Pointer to list of syscall trap handlers */
242 struct procfs_syscall_handler
*syscall_handlers
;
243 int saved_rtnval
; /* return value and status for wait(), */
244 int saved_statval
; /* as supplied by a syscall handler. */
245 int new_child
; /* Non-zero if it's a new thread */
248 /* List of inferior process information */
249 static struct procinfo
*procinfo_list
= NULL
;
250 static struct pollfd
*poll_list
; /* pollfds used for waiting on /proc */
252 static int num_poll_list
= 0; /* Number of entries in poll_list */
254 /* Much of the information used in the /proc interface, particularly for
255 printing status information, is kept as tables of structures of the
256 following form. These tables can be used to map numeric values to
257 their symbolic names and to a string that describes their specific use. */
260 int value
; /* The numeric value */
261 char *name
; /* The equivalent symbolic value */
262 char *desc
; /* Short description of value */
265 /* Translate bits in the pr_flags member of the prstatus structure, into the
266 names and desc information. */
268 static struct trans pr_flag_table
[] =
270 #if defined (PR_STOPPED)
271 { PR_STOPPED
, "PR_STOPPED", "Process is stopped" },
273 #if defined (PR_ISTOP)
274 { PR_ISTOP
, "PR_ISTOP", "Stopped on an event of interest" },
276 #if defined (PR_DSTOP)
277 { PR_DSTOP
, "PR_DSTOP", "A stop directive is in effect" },
279 #if defined (PR_ASLEEP)
280 { PR_ASLEEP
, "PR_ASLEEP", "Sleeping in an interruptible system call" },
282 #if defined (PR_FORK)
283 { PR_FORK
, "PR_FORK", "Inherit-on-fork is in effect" },
286 { PR_RLC
, "PR_RLC", "Run-on-last-close is in effect" },
288 #if defined (PR_PTRACE)
289 { PR_PTRACE
, "PR_PTRACE", "Process is being controlled by ptrace" },
291 #if defined (PR_PCINVAL)
292 { PR_PCINVAL
, "PR_PCINVAL", "PC refers to an invalid virtual address" },
294 #if defined (PR_ISSYS)
295 { PR_ISSYS
, "PR_ISSYS", "Is a system process" },
297 #if defined (PR_STEP)
298 { PR_STEP
, "PR_STEP", "Process has single step pending" },
301 { PR_KLC
, "PR_KLC", "Kill-on-last-close is in effect" },
303 #if defined (PR_ASYNC)
304 { PR_ASYNC
, "PR_ASYNC", "Asynchronous stop is in effect" },
306 #if defined (PR_PCOMPAT)
307 { PR_PCOMPAT
, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
309 #if defined (PR_MSACCT)
310 { PR_MSACCT
, "PR_MSACCT", "Microstate accounting enabled" },
312 #if defined (PR_BPTADJ)
313 { PR_BPTADJ
, "PR_BPTADJ", "Breakpoint PC adjustment in effect" },
315 #if defined (PR_ASLWP)
316 { PR_ASLWP
, "PR_ASLWP", "Asynchronus signal LWP" },
321 /* Translate values in the pr_why field of the prstatus struct. */
323 static struct trans pr_why_table
[] =
325 #if defined (PR_REQUESTED)
326 { PR_REQUESTED
, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
328 #if defined (PR_SIGNALLED)
329 { PR_SIGNALLED
, "PR_SIGNALLED", "Receipt of a traced signal" },
331 #if defined (PR_SYSENTRY)
332 { PR_SYSENTRY
, "PR_SYSENTRY", "Entry to a traced system call" },
334 #if defined (PR_SYSEXIT)
335 { PR_SYSEXIT
, "PR_SYSEXIT", "Exit from a traced system call" },
337 #if defined (PR_JOBCONTROL)
338 { PR_JOBCONTROL
, "PR_JOBCONTROL", "Default job control stop signal action" },
340 #if defined (PR_FAULTED)
341 { PR_FAULTED
, "PR_FAULTED", "Incurred a traced hardware fault" },
343 #if defined (PR_SUSPENDED)
344 { PR_SUSPENDED
, "PR_SUSPENDED", "Process suspended" },
346 #if defined (PR_CHECKPOINT)
347 { PR_CHECKPOINT
, "PR_CHECKPOINT", "(???)" },
352 /* Hardware fault translation table. */
354 static struct trans faults_table
[] =
357 { FLTILL
, "FLTILL", "Illegal instruction" },
359 #if defined (FLTPRIV)
360 { FLTPRIV
, "FLTPRIV", "Privileged instruction" },
363 { FLTBPT
, "FLTBPT", "Breakpoint trap" },
365 #if defined (FLTTRACE)
366 { FLTTRACE
, "FLTTRACE", "Trace trap" },
368 #if defined (FLTACCESS)
369 { FLTACCESS
, "FLTACCESS", "Memory access fault" },
371 #if defined (FLTBOUNDS)
372 { FLTBOUNDS
, "FLTBOUNDS", "Memory bounds violation" },
374 #if defined (FLTIOVF)
375 { FLTIOVF
, "FLTIOVF", "Integer overflow" },
377 #if defined (FLTIZDIV)
378 { FLTIZDIV
, "FLTIZDIV", "Integer zero divide" },
381 { FLTFPE
, "FLTFPE", "Floating-point exception" },
383 #if defined (FLTSTACK)
384 { FLTSTACK
, "FLTSTACK", "Unrecoverable stack fault" },
386 #if defined (FLTPAGE)
387 { FLTPAGE
, "FLTPAGE", "Recoverable page fault" },
392 /* Translation table for signal generation information. See UNIX System
393 V Release 4 Programmer's Reference Manual, siginfo(5). */
395 static struct sigcode
{
400 } siginfo_table
[] = {
401 #if defined (SIGILL) && defined (ILL_ILLOPC)
402 { SIGILL
, ILL_ILLOPC
, "ILL_ILLOPC", "Illegal opcode" },
404 #if defined (SIGILL) && defined (ILL_ILLOPN)
405 { SIGILL
, ILL_ILLOPN
, "ILL_ILLOPN", "Illegal operand", },
407 #if defined (SIGILL) && defined (ILL_ILLADR)
408 { SIGILL
, ILL_ILLADR
, "ILL_ILLADR", "Illegal addressing mode" },
410 #if defined (SIGILL) && defined (ILL_ILLTRP)
411 { SIGILL
, ILL_ILLTRP
, "ILL_ILLTRP", "Illegal trap" },
413 #if defined (SIGILL) && defined (ILL_PRVOPC)
414 { SIGILL
, ILL_PRVOPC
, "ILL_PRVOPC", "Privileged opcode" },
416 #if defined (SIGILL) && defined (ILL_PRVREG)
417 { SIGILL
, ILL_PRVREG
, "ILL_PRVREG", "Privileged register" },
419 #if defined (SIGILL) && defined (ILL_COPROC)
420 { SIGILL
, ILL_COPROC
, "ILL_COPROC", "Coprocessor error" },
422 #if defined (SIGILL) && defined (ILL_BADSTK)
423 { SIGILL
, ILL_BADSTK
, "ILL_BADSTK", "Internal stack error" },
425 #if defined (SIGFPE) && defined (FPE_INTDIV)
426 { SIGFPE
, FPE_INTDIV
, "FPE_INTDIV", "Integer divide by zero" },
428 #if defined (SIGFPE) && defined (FPE_INTOVF)
429 { SIGFPE
, FPE_INTOVF
, "FPE_INTOVF", "Integer overflow" },
431 #if defined (SIGFPE) && defined (FPE_FLTDIV)
432 { SIGFPE
, FPE_FLTDIV
, "FPE_FLTDIV", "Floating point divide by zero" },
434 #if defined (SIGFPE) && defined (FPE_FLTOVF)
435 { SIGFPE
, FPE_FLTOVF
, "FPE_FLTOVF", "Floating point overflow" },
437 #if defined (SIGFPE) && defined (FPE_FLTUND)
438 { SIGFPE
, FPE_FLTUND
, "FPE_FLTUND", "Floating point underflow" },
440 #if defined (SIGFPE) && defined (FPE_FLTRES)
441 { SIGFPE
, FPE_FLTRES
, "FPE_FLTRES", "Floating point inexact result" },
443 #if defined (SIGFPE) && defined (FPE_FLTINV)
444 { SIGFPE
, FPE_FLTINV
, "FPE_FLTINV", "Invalid floating point operation" },
446 #if defined (SIGFPE) && defined (FPE_FLTSUB)
447 { SIGFPE
, FPE_FLTSUB
, "FPE_FLTSUB", "Subscript out of range" },
449 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
450 { SIGSEGV
, SEGV_MAPERR
, "SEGV_MAPERR", "Address not mapped to object" },
452 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
453 { SIGSEGV
, SEGV_ACCERR
, "SEGV_ACCERR", "Invalid permissions for object" },
455 #if defined (SIGBUS) && defined (BUS_ADRALN)
456 { SIGBUS
, BUS_ADRALN
, "BUS_ADRALN", "Invalid address alignment" },
458 #if defined (SIGBUS) && defined (BUS_ADRERR)
459 { SIGBUS
, BUS_ADRERR
, "BUS_ADRERR", "Non-existent physical address" },
461 #if defined (SIGBUS) && defined (BUS_OBJERR)
462 { SIGBUS
, BUS_OBJERR
, "BUS_OBJERR", "Object specific hardware error" },
464 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
465 { SIGTRAP
, TRAP_BRKPT
, "TRAP_BRKPT", "Process breakpoint" },
467 #if defined (SIGTRAP) && defined (TRAP_TRACE)
468 { SIGTRAP
, TRAP_TRACE
, "TRAP_TRACE", "Process trace trap" },
470 #if defined (SIGCLD) && defined (CLD_EXITED)
471 { SIGCLD
, CLD_EXITED
, "CLD_EXITED", "Child has exited" },
473 #if defined (SIGCLD) && defined (CLD_KILLED)
474 { SIGCLD
, CLD_KILLED
, "CLD_KILLED", "Child was killed" },
476 #if defined (SIGCLD) && defined (CLD_DUMPED)
477 { SIGCLD
, CLD_DUMPED
, "CLD_DUMPED", "Child has terminated abnormally" },
479 #if defined (SIGCLD) && defined (CLD_TRAPPED)
480 { SIGCLD
, CLD_TRAPPED
, "CLD_TRAPPED", "Traced child has trapped" },
482 #if defined (SIGCLD) && defined (CLD_STOPPED)
483 { SIGCLD
, CLD_STOPPED
, "CLD_STOPPED", "Child has stopped" },
485 #if defined (SIGCLD) && defined (CLD_CONTINUED)
486 { SIGCLD
, CLD_CONTINUED
, "CLD_CONTINUED", "Stopped child had continued" },
488 #if defined (SIGPOLL) && defined (POLL_IN)
489 { SIGPOLL
, POLL_IN
, "POLL_IN", "Input input available" },
491 #if defined (SIGPOLL) && defined (POLL_OUT)
492 { SIGPOLL
, POLL_OUT
, "POLL_OUT", "Output buffers available" },
494 #if defined (SIGPOLL) && defined (POLL_MSG)
495 { SIGPOLL
, POLL_MSG
, "POLL_MSG", "Input message available" },
497 #if defined (SIGPOLL) && defined (POLL_ERR)
498 { SIGPOLL
, POLL_ERR
, "POLL_ERR", "I/O error" },
500 #if defined (SIGPOLL) && defined (POLL_PRI)
501 { SIGPOLL
, POLL_PRI
, "POLL_PRI", "High priority input available" },
503 #if defined (SIGPOLL) && defined (POLL_HUP)
504 { SIGPOLL
, POLL_HUP
, "POLL_HUP", "Device disconnected" },
509 static char *syscall_table
[MAX_SYSCALLS
];
511 /* Prototypes for local functions */
513 static void procfs_stop
PARAMS ((void));
515 static int procfs_thread_alive
PARAMS ((int));
517 static int procfs_can_run
PARAMS ((void));
519 static void procfs_mourn_inferior
PARAMS ((void));
521 static void procfs_fetch_registers
PARAMS ((int));
523 static int procfs_wait
PARAMS ((int, struct target_waitstatus
*));
525 static void procfs_open
PARAMS ((char *, int));
527 static void procfs_files_info
PARAMS ((struct target_ops
*));
529 static void procfs_prepare_to_store
PARAMS ((void));
531 static void procfs_detach
PARAMS ((char *, int));
533 static void procfs_attach
PARAMS ((char *, int));
535 static void proc_set_exec_trap
PARAMS ((void));
537 static void procfs_init_inferior
PARAMS ((int));
539 static struct procinfo
*create_procinfo
PARAMS ((int));
541 static void procfs_store_registers
PARAMS ((int));
543 static int procfs_xfer_memory
PARAMS ((CORE_ADDR
, char *, int, int, struct target_ops
*));
545 static void procfs_kill_inferior
PARAMS ((void));
547 static char *sigcodedesc
PARAMS ((siginfo_t
*));
549 static char *sigcodename
PARAMS ((siginfo_t
*));
551 static struct procinfo
*wait_fd
PARAMS ((void));
553 static void remove_fd
PARAMS ((struct procinfo
*));
555 static void add_fd
PARAMS ((struct procinfo
*));
557 static void set_proc_siginfo
PARAMS ((struct procinfo
*, int));
559 static void init_syscall_table
PARAMS ((void));
561 static char *syscallname
PARAMS ((int));
563 static char *signalname
PARAMS ((int));
565 static char *errnoname
PARAMS ((int));
567 static int proc_address_to_fd
PARAMS ((struct procinfo
*, CORE_ADDR
, int));
569 static int open_proc_file
PARAMS ((int, struct procinfo
*, int, int));
571 static void close_proc_file
PARAMS ((struct procinfo
*));
573 static void unconditionally_kill_inferior
PARAMS ((struct procinfo
*));
575 static NORETURN
void proc_init_failed
PARAMS ((struct procinfo
*, char *, int)) ATTR_NORETURN
;
577 static void info_proc
PARAMS ((char *, int));
579 static void info_proc_flags
PARAMS ((struct procinfo
*, int));
581 static void info_proc_stop
PARAMS ((struct procinfo
*, int));
583 static void info_proc_siginfo
PARAMS ((struct procinfo
*, int));
585 static void info_proc_syscalls
PARAMS ((struct procinfo
*, int));
587 static void info_proc_mappings
PARAMS ((struct procinfo
*, int));
589 static void info_proc_signals
PARAMS ((struct procinfo
*, int));
591 static void info_proc_faults
PARAMS ((struct procinfo
*, int));
593 static char *mappingflags
PARAMS ((long));
595 static char *lookupname
PARAMS ((struct trans
*, unsigned int, char *));
597 static char *lookupdesc
PARAMS ((struct trans
*, unsigned int));
599 static int do_attach
PARAMS ((int pid
));
601 static void do_detach
PARAMS ((int siggnal
));
603 static void procfs_create_inferior
PARAMS ((char *, char *, char **));
605 static void procfs_notice_signals
PARAMS ((int pid
));
607 static void notice_signals
PARAMS ((struct procinfo
*, struct sig_ctl
*));
609 static struct procinfo
*find_procinfo
PARAMS ((pid_t pid
, int okfail
));
611 static int procfs_write_pcwstop
PARAMS ((struct procinfo
*));
612 static int procfs_read_status
PARAMS ((struct procinfo
*));
613 static void procfs_write_pckill
PARAMS ((struct procinfo
*));
615 typedef int syscall_func_t
PARAMS ((struct procinfo
*pi
, int syscall_num
,
616 int why
, int *rtnval
, int *statval
));
618 static void procfs_set_syscall_trap
PARAMS ((struct procinfo
*pi
,
619 int syscall_num
, int flags
,
620 syscall_func_t
*func
));
622 static void procfs_clear_syscall_trap
PARAMS ((struct procinfo
*pi
,
623 int syscall_num
, int errok
));
625 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
626 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
628 static syscall_func_t procfs_exit_handler
;
630 static syscall_func_t procfs_exec_handler
;
633 static syscall_func_t procfs_sproc_handler
;
634 static syscall_func_t procfs_fork_handler
;
637 #ifdef SYS_lwp_create
638 static syscall_func_t procfs_lwp_creation_handler
;
641 static void modify_inherit_on_fork_flag
PARAMS ((int fd
, int flag
));
642 static void modify_run_on_last_close_flag
PARAMS ((int fd
, int flag
));
646 struct procfs_syscall_handler
648 int syscall_num
; /* The number of the system call being handled */
649 /* The function to be called */
650 syscall_func_t
*func
;
653 static void procfs_resume
PARAMS ((int pid
, int step
,
654 enum target_signal signo
));
656 /* External function prototypes that can't be easily included in any
657 header file because the args are typedefs in system include files. */
659 extern void supply_gregset
PARAMS ((gdb_gregset_t
*));
661 extern void fill_gregset
PARAMS ((gdb_gregset_t
*, int));
664 extern void supply_fpregset
PARAMS ((gdb_fpregset_t
*));
666 extern void fill_fpregset
PARAMS ((gdb_fpregset_t
*, int));
673 find_procinfo -- convert a process id to a struct procinfo
677 static struct procinfo * find_procinfo (pid_t pid, int okfail);
681 Given a process id, look it up in the procinfo chain. Returns
682 a struct procinfo *. If can't find pid, then call error(),
683 unless okfail is set, in which case, return NULL;
686 static struct procinfo
*
687 find_procinfo (pid
, okfail
)
691 struct procinfo
*procinfo
;
693 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
694 if (procinfo
->pid
== pid
)
700 error ("procfs (find_procinfo): Couldn't locate pid %d", pid
);
707 current_procinfo -- convert inferior_pid to a struct procinfo
711 static struct procinfo * current_procinfo;
715 Looks up inferior_pid in the procinfo chain. Always returns a
716 struct procinfo *. If process can't be found, we error() out.
719 #define current_procinfo find_procinfo (inferior_pid, 0)
725 add_fd -- Add the fd to the poll/select list
729 static void add_fd (struct procinfo *);
733 Add the fd of the supplied procinfo to the list of fds used for
734 poll/select operations.
741 if (num_poll_list
<= 0)
742 poll_list
= (struct pollfd
*) xmalloc (sizeof (struct pollfd
));
744 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
746 * sizeof (struct pollfd
));
747 poll_list
[num_poll_list
].fd
= pi
->ctl_fd
;
749 poll_list
[num_poll_list
].events
= POLLWRNORM
;
751 poll_list
[num_poll_list
].events
= POLLPRI
;
761 remove_fd -- Remove the fd from the poll/select list
765 static void remove_fd (struct procinfo *);
769 Remove the fd of the supplied procinfo from the list of fds used
770 for poll/select operations.
779 for (i
= 0; i
< num_poll_list
; i
++)
781 if (poll_list
[i
].fd
== pi
->ctl_fd
)
783 if (i
!= num_poll_list
- 1)
784 memcpy (poll_list
+ i
, poll_list
+ i
+ 1,
785 (num_poll_list
- i
- 1) * sizeof (struct pollfd
));
789 if (num_poll_list
== 0)
792 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
794 * sizeof (struct pollfd
));
804 procfs_read_status - get procfs fd status
808 static int procfs_read_status (pi) struct procinfo *pi;
812 Given a pointer to a procinfo struct, get the status of
813 the status_fd in the appropriate way. Returns 0 on failure,
818 procfs_read_status (pi
)
821 #ifdef PROCFS_USE_READ_WRITE
822 if ((lseek (pi
->status_fd
, 0, SEEK_SET
) < 0) ||
823 (read (pi
->status_fd
, (char *) &pi
->prstatus
,
824 sizeof (gdb_prstatus_t
)) != sizeof (gdb_prstatus_t
)))
826 if (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
837 procfs_write_pcwstop - send a PCWSTOP to procfs fd
841 static int procfs_write_pcwstop (pi) struct procinfo *pi;
845 Given a pointer to a procinfo struct, send a PCWSTOP to
846 the ctl_fd in the appropriate way. Returns 0 on failure,
851 procfs_write_pcwstop (pi
)
854 #ifdef PROCFS_USE_READ_WRITE
856 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
858 if (ioctl (pi
->ctl_fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
869 procfs_write_pckill - send a kill to procfs fd
873 static void procfs_write_pckill (pi) struct procinfo *pi;
877 Given a pointer to a procinfo struct, send a kill to
878 the ctl_fd in the appropriate way. Returns 0 on failure,
883 procfs_write_pckill (pi
)
886 #ifdef PROCFS_USE_READ_WRITE
887 struct proc_ctl pctl
;
890 write (pi
->ctl_fd
, &pctl
, sizeof (struct proc_ctl
));
893 ioctl (pi
->ctl_fd
, PIOCKILL
, &signo
);
897 static struct procinfo
*
900 struct procinfo
*pi
, *next_pi
;
906 set_sigint_trap (); /* Causes SIGINT to be passed on to the
914 num_fds
= poll (poll_list
, num_poll_list
, -1);
917 if (num_fds
< 0 && errno
== EINTR
)
919 print_sys_errmsg ("poll failed", errno
);
920 error ("Poll failed, returned %d", num_fds
);
922 #else /* LOSING_POLL */
923 pi
= current_procinfo
;
925 while (!procfs_write_pcwstop (pi
))
929 /* Process exited. */
930 pi
->prstatus
.pr_flags
= 0;
933 else if (errno
!= EINTR
)
935 print_sys_errmsg (pi
->pathname
, errno
);
936 error ("procfs_write_pcwstop failed");
940 #endif /* LOSING_POLL */
942 clear_sigint_trap ();
947 for (i
= 0; i
< num_poll_list
&& num_fds
> 0; i
++)
949 if (0 == (poll_list
[i
].revents
&
950 (POLLWRNORM
| POLLPRI
| POLLERR
| POLLHUP
| POLLNVAL
)))
952 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
955 if (poll_list
[i
].fd
== pi
->ctl_fd
)
958 if ((poll_list
[i
].revents
& POLLHUP
) != 0 ||
959 !procfs_read_status(pi
))
960 { /* The LWP has apparently terminated. */
961 if (num_poll_list
<= 1)
963 pi
->prstatus
.pr_flags
= 0;
968 printf_filtered ("LWP %d exited.\n",
969 (pi
->pid
>> 16) & 0xffff);
970 close_proc_file (pi
);
972 continue; /* already another event to process */
974 goto wait_again
; /* wait for another event */
981 error ("wait_fd: Couldn't find procinfo for fd %d\n",
984 #endif /* LOSING_POLL */
993 lookupdesc -- translate a value to a summary desc string
997 static char *lookupdesc (struct trans *transp, unsigned int val);
1001 Given a pointer to a translation table and a value to be translated,
1002 lookup the desc string and return it.
1006 lookupdesc (transp
, val
)
1007 struct trans
*transp
;
1012 for (desc
= NULL
; transp
-> name
!= NULL
; transp
++)
1014 if (transp
-> value
== val
)
1016 desc
= transp
-> desc
;
1021 /* Didn't find a translation for the specified value, set a default one. */
1034 lookupname -- translate a value to symbolic name
1038 static char *lookupname (struct trans *transp, unsigned int val,
1043 Given a pointer to a translation table, a value to be translated,
1044 and a default prefix to return if the value can't be translated,
1045 match the value with one of the translation table entries and
1046 return a pointer to the symbolic name.
1048 If no match is found it just returns the value as a printable string,
1049 with the given prefix. The previous such value, if any, is freed
1054 lookupname (transp
, val
, prefix
)
1055 struct trans
*transp
;
1059 static char *locbuf
;
1062 for (name
= NULL
; transp
-> name
!= NULL
; transp
++)
1064 if (transp
-> value
== val
)
1066 name
= transp
-> name
;
1071 /* Didn't find a translation for the specified value, build a default
1072 one using the specified prefix and return it. The lifetime of
1073 the value is only until the next one is needed. */
1081 locbuf
= xmalloc (strlen (prefix
) + 16);
1082 sprintf (locbuf
, "%s %u", prefix
, val
);
1092 struct sigcode
*scp
;
1094 static char locbuf
[32];
1096 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1098 if ((scp
-> signo
== sip
-> si_signo
) &&
1099 (scp
-> code
== sip
-> si_code
))
1101 name
= scp
-> codename
;
1107 sprintf (locbuf
, "sigcode %u", sip
-> si_signo
);
1117 struct sigcode
*scp
;
1120 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1122 if ((scp
-> signo
== sip
-> si_signo
) &&
1123 (scp
-> code
== sip
-> si_code
))
1131 desc
= "Unrecognized signal or trap use";
1140 syscallname - translate a system call number into a system call name
1144 char *syscallname (int syscallnum)
1148 Given a system call number, translate it into the printable name
1149 of a system call, or into "syscall <num>" if it is an unknown
1154 syscallname (syscallnum
)
1157 static char locbuf
[32];
1159 if (syscallnum
>= 0 && syscallnum
< MAX_SYSCALLS
1160 && syscall_table
[syscallnum
] != NULL
)
1161 return syscall_table
[syscallnum
];
1164 sprintf (locbuf
, "syscall %u", syscallnum
);
1173 init_syscall_table - initialize syscall translation table
1177 void init_syscall_table (void)
1181 Dynamically initialize the translation table to convert system
1182 call numbers into printable system call names. Done once per
1183 gdb run, on initialization.
1187 This is awfully ugly, but preprocessor tricks to make it prettier
1188 tend to be nonportable.
1192 init_syscall_table ()
1194 #if defined (SYS_exit)
1195 syscall_table
[SYS_exit
] = "exit";
1197 #if defined (SYS_fork)
1198 syscall_table
[SYS_fork
] = "fork";
1200 #if defined (SYS_read)
1201 syscall_table
[SYS_read
] = "read";
1203 #if defined (SYS_write)
1204 syscall_table
[SYS_write
] = "write";
1206 #if defined (SYS_open)
1207 syscall_table
[SYS_open
] = "open";
1209 #if defined (SYS_close)
1210 syscall_table
[SYS_close
] = "close";
1212 #if defined (SYS_wait)
1213 syscall_table
[SYS_wait
] = "wait";
1215 #if defined (SYS_creat)
1216 syscall_table
[SYS_creat
] = "creat";
1218 #if defined (SYS_link)
1219 syscall_table
[SYS_link
] = "link";
1221 #if defined (SYS_unlink)
1222 syscall_table
[SYS_unlink
] = "unlink";
1224 #if defined (SYS_exec)
1225 syscall_table
[SYS_exec
] = "exec";
1227 #if defined (SYS_execv)
1228 syscall_table
[SYS_execv
] = "execv";
1230 #if defined (SYS_execve)
1231 syscall_table
[SYS_execve
] = "execve";
1233 #if defined (SYS_chdir)
1234 syscall_table
[SYS_chdir
] = "chdir";
1236 #if defined (SYS_time)
1237 syscall_table
[SYS_time
] = "time";
1239 #if defined (SYS_mknod)
1240 syscall_table
[SYS_mknod
] = "mknod";
1242 #if defined (SYS_chmod)
1243 syscall_table
[SYS_chmod
] = "chmod";
1245 #if defined (SYS_chown)
1246 syscall_table
[SYS_chown
] = "chown";
1248 #if defined (SYS_brk)
1249 syscall_table
[SYS_brk
] = "brk";
1251 #if defined (SYS_stat)
1252 syscall_table
[SYS_stat
] = "stat";
1254 #if defined (SYS_lseek)
1255 syscall_table
[SYS_lseek
] = "lseek";
1257 #if defined (SYS_getpid)
1258 syscall_table
[SYS_getpid
] = "getpid";
1260 #if defined (SYS_mount)
1261 syscall_table
[SYS_mount
] = "mount";
1263 #if defined (SYS_umount)
1264 syscall_table
[SYS_umount
] = "umount";
1266 #if defined (SYS_setuid)
1267 syscall_table
[SYS_setuid
] = "setuid";
1269 #if defined (SYS_getuid)
1270 syscall_table
[SYS_getuid
] = "getuid";
1272 #if defined (SYS_stime)
1273 syscall_table
[SYS_stime
] = "stime";
1275 #if defined (SYS_ptrace)
1276 syscall_table
[SYS_ptrace
] = "ptrace";
1278 #if defined (SYS_alarm)
1279 syscall_table
[SYS_alarm
] = "alarm";
1281 #if defined (SYS_fstat)
1282 syscall_table
[SYS_fstat
] = "fstat";
1284 #if defined (SYS_pause)
1285 syscall_table
[SYS_pause
] = "pause";
1287 #if defined (SYS_utime)
1288 syscall_table
[SYS_utime
] = "utime";
1290 #if defined (SYS_stty)
1291 syscall_table
[SYS_stty
] = "stty";
1293 #if defined (SYS_gtty)
1294 syscall_table
[SYS_gtty
] = "gtty";
1296 #if defined (SYS_access)
1297 syscall_table
[SYS_access
] = "access";
1299 #if defined (SYS_nice)
1300 syscall_table
[SYS_nice
] = "nice";
1302 #if defined (SYS_statfs)
1303 syscall_table
[SYS_statfs
] = "statfs";
1305 #if defined (SYS_sync)
1306 syscall_table
[SYS_sync
] = "sync";
1308 #if defined (SYS_kill)
1309 syscall_table
[SYS_kill
] = "kill";
1311 #if defined (SYS_fstatfs)
1312 syscall_table
[SYS_fstatfs
] = "fstatfs";
1314 #if defined (SYS_pgrpsys)
1315 syscall_table
[SYS_pgrpsys
] = "pgrpsys";
1317 #if defined (SYS_xenix)
1318 syscall_table
[SYS_xenix
] = "xenix";
1320 #if defined (SYS_dup)
1321 syscall_table
[SYS_dup
] = "dup";
1323 #if defined (SYS_pipe)
1324 syscall_table
[SYS_pipe
] = "pipe";
1326 #if defined (SYS_times)
1327 syscall_table
[SYS_times
] = "times";
1329 #if defined (SYS_profil)
1330 syscall_table
[SYS_profil
] = "profil";
1332 #if defined (SYS_plock)
1333 syscall_table
[SYS_plock
] = "plock";
1335 #if defined (SYS_setgid)
1336 syscall_table
[SYS_setgid
] = "setgid";
1338 #if defined (SYS_getgid)
1339 syscall_table
[SYS_getgid
] = "getgid";
1341 #if defined (SYS_signal)
1342 syscall_table
[SYS_signal
] = "signal";
1344 #if defined (SYS_msgsys)
1345 syscall_table
[SYS_msgsys
] = "msgsys";
1347 #if defined (SYS_sys3b)
1348 syscall_table
[SYS_sys3b
] = "sys3b";
1350 #if defined (SYS_sysi86)
1351 syscall_table
[SYS_sysi86
] = "sysi86";
1353 #if defined (SYS_acct)
1354 syscall_table
[SYS_acct
] = "acct";
1356 #if defined (SYS_shmsys)
1357 syscall_table
[SYS_shmsys
] = "shmsys";
1359 #if defined (SYS_semsys)
1360 syscall_table
[SYS_semsys
] = "semsys";
1362 #if defined (SYS_ioctl)
1363 syscall_table
[SYS_ioctl
] = "ioctl";
1365 #if defined (SYS_uadmin)
1366 syscall_table
[SYS_uadmin
] = "uadmin";
1368 #if defined (SYS_utssys)
1369 syscall_table
[SYS_utssys
] = "utssys";
1371 #if defined (SYS_fsync)
1372 syscall_table
[SYS_fsync
] = "fsync";
1374 #if defined (SYS_umask)
1375 syscall_table
[SYS_umask
] = "umask";
1377 #if defined (SYS_chroot)
1378 syscall_table
[SYS_chroot
] = "chroot";
1380 #if defined (SYS_fcntl)
1381 syscall_table
[SYS_fcntl
] = "fcntl";
1383 #if defined (SYS_ulimit)
1384 syscall_table
[SYS_ulimit
] = "ulimit";
1386 #if defined (SYS_rfsys)
1387 syscall_table
[SYS_rfsys
] = "rfsys";
1389 #if defined (SYS_rmdir)
1390 syscall_table
[SYS_rmdir
] = "rmdir";
1392 #if defined (SYS_mkdir)
1393 syscall_table
[SYS_mkdir
] = "mkdir";
1395 #if defined (SYS_getdents)
1396 syscall_table
[SYS_getdents
] = "getdents";
1398 #if defined (SYS_sysfs)
1399 syscall_table
[SYS_sysfs
] = "sysfs";
1401 #if defined (SYS_getmsg)
1402 syscall_table
[SYS_getmsg
] = "getmsg";
1404 #if defined (SYS_putmsg)
1405 syscall_table
[SYS_putmsg
] = "putmsg";
1407 #if defined (SYS_poll)
1408 syscall_table
[SYS_poll
] = "poll";
1410 #if defined (SYS_lstat)
1411 syscall_table
[SYS_lstat
] = "lstat";
1413 #if defined (SYS_symlink)
1414 syscall_table
[SYS_symlink
] = "symlink";
1416 #if defined (SYS_readlink)
1417 syscall_table
[SYS_readlink
] = "readlink";
1419 #if defined (SYS_setgroups)
1420 syscall_table
[SYS_setgroups
] = "setgroups";
1422 #if defined (SYS_getgroups)
1423 syscall_table
[SYS_getgroups
] = "getgroups";
1425 #if defined (SYS_fchmod)
1426 syscall_table
[SYS_fchmod
] = "fchmod";
1428 #if defined (SYS_fchown)
1429 syscall_table
[SYS_fchown
] = "fchown";
1431 #if defined (SYS_sigprocmask)
1432 syscall_table
[SYS_sigprocmask
] = "sigprocmask";
1434 #if defined (SYS_sigsuspend)
1435 syscall_table
[SYS_sigsuspend
] = "sigsuspend";
1437 #if defined (SYS_sigaltstack)
1438 syscall_table
[SYS_sigaltstack
] = "sigaltstack";
1440 #if defined (SYS_sigaction)
1441 syscall_table
[SYS_sigaction
] = "sigaction";
1443 #if defined (SYS_sigpending)
1444 syscall_table
[SYS_sigpending
] = "sigpending";
1446 #if defined (SYS_context)
1447 syscall_table
[SYS_context
] = "context";
1449 #if defined (SYS_evsys)
1450 syscall_table
[SYS_evsys
] = "evsys";
1452 #if defined (SYS_evtrapret)
1453 syscall_table
[SYS_evtrapret
] = "evtrapret";
1455 #if defined (SYS_statvfs)
1456 syscall_table
[SYS_statvfs
] = "statvfs";
1458 #if defined (SYS_fstatvfs)
1459 syscall_table
[SYS_fstatvfs
] = "fstatvfs";
1461 #if defined (SYS_nfssys)
1462 syscall_table
[SYS_nfssys
] = "nfssys";
1464 #if defined (SYS_waitsys)
1465 syscall_table
[SYS_waitsys
] = "waitsys";
1467 #if defined (SYS_sigsendsys)
1468 syscall_table
[SYS_sigsendsys
] = "sigsendsys";
1470 #if defined (SYS_hrtsys)
1471 syscall_table
[SYS_hrtsys
] = "hrtsys";
1473 #if defined (SYS_acancel)
1474 syscall_table
[SYS_acancel
] = "acancel";
1476 #if defined (SYS_async)
1477 syscall_table
[SYS_async
] = "async";
1479 #if defined (SYS_priocntlsys)
1480 syscall_table
[SYS_priocntlsys
] = "priocntlsys";
1482 #if defined (SYS_pathconf)
1483 syscall_table
[SYS_pathconf
] = "pathconf";
1485 #if defined (SYS_mincore)
1486 syscall_table
[SYS_mincore
] = "mincore";
1488 #if defined (SYS_mmap)
1489 syscall_table
[SYS_mmap
] = "mmap";
1491 #if defined (SYS_mprotect)
1492 syscall_table
[SYS_mprotect
] = "mprotect";
1494 #if defined (SYS_munmap)
1495 syscall_table
[SYS_munmap
] = "munmap";
1497 #if defined (SYS_fpathconf)
1498 syscall_table
[SYS_fpathconf
] = "fpathconf";
1500 #if defined (SYS_vfork)
1501 syscall_table
[SYS_vfork
] = "vfork";
1503 #if defined (SYS_fchdir)
1504 syscall_table
[SYS_fchdir
] = "fchdir";
1506 #if defined (SYS_readv)
1507 syscall_table
[SYS_readv
] = "readv";
1509 #if defined (SYS_writev)
1510 syscall_table
[SYS_writev
] = "writev";
1512 #if defined (SYS_xstat)
1513 syscall_table
[SYS_xstat
] = "xstat";
1515 #if defined (SYS_lxstat)
1516 syscall_table
[SYS_lxstat
] = "lxstat";
1518 #if defined (SYS_fxstat)
1519 syscall_table
[SYS_fxstat
] = "fxstat";
1521 #if defined (SYS_xmknod)
1522 syscall_table
[SYS_xmknod
] = "xmknod";
1524 #if defined (SYS_clocal)
1525 syscall_table
[SYS_clocal
] = "clocal";
1527 #if defined (SYS_setrlimit)
1528 syscall_table
[SYS_setrlimit
] = "setrlimit";
1530 #if defined (SYS_getrlimit)
1531 syscall_table
[SYS_getrlimit
] = "getrlimit";
1533 #if defined (SYS_lchown)
1534 syscall_table
[SYS_lchown
] = "lchown";
1536 #if defined (SYS_memcntl)
1537 syscall_table
[SYS_memcntl
] = "memcntl";
1539 #if defined (SYS_getpmsg)
1540 syscall_table
[SYS_getpmsg
] = "getpmsg";
1542 #if defined (SYS_putpmsg)
1543 syscall_table
[SYS_putpmsg
] = "putpmsg";
1545 #if defined (SYS_rename)
1546 syscall_table
[SYS_rename
] = "rename";
1548 #if defined (SYS_uname)
1549 syscall_table
[SYS_uname
] = "uname";
1551 #if defined (SYS_setegid)
1552 syscall_table
[SYS_setegid
] = "setegid";
1554 #if defined (SYS_sysconfig)
1555 syscall_table
[SYS_sysconfig
] = "sysconfig";
1557 #if defined (SYS_adjtime)
1558 syscall_table
[SYS_adjtime
] = "adjtime";
1560 #if defined (SYS_systeminfo)
1561 syscall_table
[SYS_systeminfo
] = "systeminfo";
1563 #if defined (SYS_seteuid)
1564 syscall_table
[SYS_seteuid
] = "seteuid";
1566 #if defined (SYS_sproc)
1567 syscall_table
[SYS_sproc
] = "sproc";
1569 #if defined (SYS_keyctl)
1570 syscall_table
[SYS_keyctl
] = "keyctl";
1572 #if defined (SYS_secsys)
1573 syscall_table
[SYS_secsys
] = "secsys";
1575 #if defined (SYS_filepriv)
1576 syscall_table
[SYS_filepriv
] = "filepriv";
1578 #if defined (SYS_procpriv)
1579 syscall_table
[SYS_procpriv
] = "procpriv";
1581 #if defined (SYS_devstat)
1582 syscall_table
[SYS_devstat
] = "devstat";
1584 #if defined (SYS_aclipc)
1585 syscall_table
[SYS_aclipc
] = "aclipc";
1587 #if defined (SYS_fdevstat)
1588 syscall_table
[SYS_fdevstat
] = "fdevstat";
1590 #if defined (SYS_flvlfile)
1591 syscall_table
[SYS_flvlfile
] = "flvlfile";
1593 #if defined (SYS_lvlfile)
1594 syscall_table
[SYS_lvlfile
] = "lvlfile";
1596 #if defined (SYS_lvlequal)
1597 syscall_table
[SYS_lvlequal
] = "lvlequal";
1599 #if defined (SYS_lvlproc)
1600 syscall_table
[SYS_lvlproc
] = "lvlproc";
1602 #if defined (SYS_lvlipc)
1603 syscall_table
[SYS_lvlipc
] = "lvlipc";
1605 #if defined (SYS_acl)
1606 syscall_table
[SYS_acl
] = "acl";
1608 #if defined (SYS_auditevt)
1609 syscall_table
[SYS_auditevt
] = "auditevt";
1611 #if defined (SYS_auditctl)
1612 syscall_table
[SYS_auditctl
] = "auditctl";
1614 #if defined (SYS_auditdmp)
1615 syscall_table
[SYS_auditdmp
] = "auditdmp";
1617 #if defined (SYS_auditlog)
1618 syscall_table
[SYS_auditlog
] = "auditlog";
1620 #if defined (SYS_auditbuf)
1621 syscall_table
[SYS_auditbuf
] = "auditbuf";
1623 #if defined (SYS_lvldom)
1624 syscall_table
[SYS_lvldom
] = "lvldom";
1626 #if defined (SYS_lvlvfs)
1627 syscall_table
[SYS_lvlvfs
] = "lvlvfs";
1629 #if defined (SYS_mkmld)
1630 syscall_table
[SYS_mkmld
] = "mkmld";
1632 #if defined (SYS_mldmode)
1633 syscall_table
[SYS_mldmode
] = "mldmode";
1635 #if defined (SYS_secadvise)
1636 syscall_table
[SYS_secadvise
] = "secadvise";
1638 #if defined (SYS_online)
1639 syscall_table
[SYS_online
] = "online";
1641 #if defined (SYS_setitimer)
1642 syscall_table
[SYS_setitimer
] = "setitimer";
1644 #if defined (SYS_getitimer)
1645 syscall_table
[SYS_getitimer
] = "getitimer";
1647 #if defined (SYS_gettimeofday)
1648 syscall_table
[SYS_gettimeofday
] = "gettimeofday";
1650 #if defined (SYS_settimeofday)
1651 syscall_table
[SYS_settimeofday
] = "settimeofday";
1653 #if defined (SYS_lwp_create)
1654 syscall_table
[SYS_lwp_create
] = "_lwp_create";
1656 #if defined (SYS_lwp_exit)
1657 syscall_table
[SYS_lwp_exit
] = "_lwp_exit";
1659 #if defined (SYS_lwp_wait)
1660 syscall_table
[SYS_lwp_wait
] = "_lwp_wait";
1662 #if defined (SYS_lwp_self)
1663 syscall_table
[SYS_lwp_self
] = "_lwp_self";
1665 #if defined (SYS_lwp_info)
1666 syscall_table
[SYS_lwp_info
] = "_lwp_info";
1668 #if defined (SYS_lwp_private)
1669 syscall_table
[SYS_lwp_private
] = "_lwp_private";
1671 #if defined (SYS_processor_bind)
1672 syscall_table
[SYS_processor_bind
] = "processor_bind";
1674 #if defined (SYS_processor_exbind)
1675 syscall_table
[SYS_processor_exbind
] = "processor_exbind";
1677 #if defined (SYS_prepblock)
1678 syscall_table
[SYS_prepblock
] = "prepblock";
1680 #if defined (SYS_block)
1681 syscall_table
[SYS_block
] = "block";
1683 #if defined (SYS_rdblock)
1684 syscall_table
[SYS_rdblock
] = "rdblock";
1686 #if defined (SYS_unblock)
1687 syscall_table
[SYS_unblock
] = "unblock";
1689 #if defined (SYS_cancelblock)
1690 syscall_table
[SYS_cancelblock
] = "cancelblock";
1692 #if defined (SYS_pread)
1693 syscall_table
[SYS_pread
] = "pread";
1695 #if defined (SYS_pwrite)
1696 syscall_table
[SYS_pwrite
] = "pwrite";
1698 #if defined (SYS_truncate)
1699 syscall_table
[SYS_truncate
] = "truncate";
1701 #if defined (SYS_ftruncate)
1702 syscall_table
[SYS_ftruncate
] = "ftruncate";
1704 #if defined (SYS_lwp_kill)
1705 syscall_table
[SYS_lwp_kill
] = "_lwp_kill";
1707 #if defined (SYS_sigwait)
1708 syscall_table
[SYS_sigwait
] = "sigwait";
1710 #if defined (SYS_fork1)
1711 syscall_table
[SYS_fork1
] = "fork1";
1713 #if defined (SYS_forkall)
1714 syscall_table
[SYS_forkall
] = "forkall";
1716 #if defined (SYS_modload)
1717 syscall_table
[SYS_modload
] = "modload";
1719 #if defined (SYS_moduload)
1720 syscall_table
[SYS_moduload
] = "moduload";
1722 #if defined (SYS_modpath)
1723 syscall_table
[SYS_modpath
] = "modpath";
1725 #if defined (SYS_modstat)
1726 syscall_table
[SYS_modstat
] = "modstat";
1728 #if defined (SYS_modadm)
1729 syscall_table
[SYS_modadm
] = "modadm";
1731 #if defined (SYS_getksym)
1732 syscall_table
[SYS_getksym
] = "getksym";
1734 #if defined (SYS_lwp_suspend)
1735 syscall_table
[SYS_lwp_suspend
] = "_lwp_suspend";
1737 #if defined (SYS_lwp_continue)
1738 syscall_table
[SYS_lwp_continue
] = "_lwp_continue";
1740 #if defined (SYS_priocntllst)
1741 syscall_table
[SYS_priocntllst
] = "priocntllst";
1743 #if defined (SYS_sleep)
1744 syscall_table
[SYS_sleep
] = "sleep";
1746 #if defined (SYS_lwp_sema_wait)
1747 syscall_table
[SYS_lwp_sema_wait
] = "_lwp_sema_wait";
1749 #if defined (SYS_lwp_sema_post)
1750 syscall_table
[SYS_lwp_sema_post
] = "_lwp_sema_post";
1752 #if defined (SYS_lwp_sema_trywait)
1753 syscall_table
[SYS_lwp_sema_trywait
] = "lwp_sema_trywait";
1755 #if defined(SYS_fstatvfs64)
1756 syscall_table
[SYS_fstatvfs64
] = "fstatvfs64";
1758 #if defined(SYS_statvfs64)
1759 syscall_table
[SYS_statvfs64
] = "statvfs64";
1761 #if defined(SYS_ftruncate64)
1762 syscall_table
[SYS_ftruncate64
] = "ftruncate64";
1764 #if defined(SYS_truncate64)
1765 syscall_table
[SYS_truncate64
] = "truncate64";
1767 #if defined(SYS_getrlimit64)
1768 syscall_table
[SYS_getrlimit64
] = "getrlimit64";
1770 #if defined(SYS_setrlimit64)
1771 syscall_table
[SYS_setrlimit64
] = "setrlimit64";
1773 #if defined(SYS_lseek64)
1774 syscall_table
[SYS_lseek64
] = "lseek64";
1776 #if defined(SYS_mmap64)
1777 syscall_table
[SYS_mmap64
] = "mmap64";
1779 #if defined(SYS_pread64)
1780 syscall_table
[SYS_pread64
] = "pread64";
1782 #if defined(SYS_creat64)
1783 syscall_table
[SYS_creat64
] = "creat64";
1785 #if defined(SYS_dshmsys)
1786 syscall_table
[SYS_dshmsys
] = "dshmsys";
1788 #if defined(SYS_invlpg)
1789 syscall_table
[SYS_invlpg
] = "invlpg";
1791 #if defined(SYS_cg_ids)
1792 syscall_table
[SYS_cg_ids
] = "cg_ids";
1794 #if defined(SYS_cg_processors)
1795 syscall_table
[SYS_cg_processors
] = "cg_processors";
1797 #if defined(SYS_cg_info)
1798 syscall_table
[SYS_cg_info
] = "cg_info";
1800 #if defined(SYS_cg_bind)
1801 syscall_table
[SYS_cg_bind
] = "cg_bind";
1803 #if defined(SYS_cg_current)
1804 syscall_table
[SYS_cg_current
] = "cg_current";
1806 #if defined(SYS_cg_memloc)
1807 syscall_table
[SYS_cg_memloc
] = "cg_memloc";
1815 procfs_kill_inferior - kill any currently inferior
1819 void procfs_kill_inferior (void)
1823 Kill any current inferior.
1827 Kills even attached inferiors. Presumably the user has already
1828 been prompted that the inferior is an attached one rather than
1829 one started by gdb. (FIXME?)
1834 procfs_kill_inferior ()
1836 target_mourn_inferior ();
1843 unconditionally_kill_inferior - terminate the inferior
1847 static void unconditionally_kill_inferior (struct procinfo *)
1851 Kill the specified inferior.
1855 A possibly useful enhancement would be to first try sending
1856 the inferior a terminate signal, politely asking it to commit
1857 suicide, before we murder it (we could call that
1858 politely_kill_inferior()).
1863 unconditionally_kill_inferior (pi
)
1864 struct procinfo
*pi
;
1867 struct proc_ctl pctl
;
1869 ppid
= pi
->prstatus
.pr_ppid
;
1871 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
1872 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1873 before the PIOCKILL, otherwise it might generate a corrupted core
1874 file for the inferior. */
1875 ioctl (pi
->ctl_fd
, PIOCSSIG
, NULL
);
1877 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1878 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1879 to kill the inferior, otherwise it might remain stopped with a
1881 We do not check the result of the PIOCSSIG, the inferior might have
1884 struct siginfo newsiginfo
;
1886 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
1887 newsiginfo
.si_signo
= SIGKILL
;
1888 newsiginfo
.si_code
= 0;
1889 newsiginfo
.si_errno
= 0;
1890 newsiginfo
.si_pid
= getpid ();
1891 newsiginfo
.si_uid
= getuid ();
1892 ioctl (pi
->ctl_fd
, PIOCSSIG
, &newsiginfo
);
1894 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1895 procfs_write_pckill (pi
);
1896 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1898 close_proc_file (pi
);
1900 /* Only wait() for our direct children. Our grandchildren zombies are killed
1901 by the death of their parents. */
1903 if (ppid
== getpid())
1911 procfs_xfer_memory -- copy data to or from inferior memory space
1915 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1916 int dowrite, struct target_ops target)
1920 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1921 from/to debugger memory starting at MYADDR. Copy from inferior
1922 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1924 Returns the length copied, which is either the LEN argument or
1925 zero. This xfer function does not do partial moves, since procfs_ops
1926 doesn't allow memory operations to cross below us in the target stack
1931 The /proc interface makes this an almost trivial task.
1935 procfs_xfer_memory (memaddr
, myaddr
, len
, dowrite
, target
)
1940 struct target_ops
*target
; /* ignored */
1943 struct procinfo
*pi
;
1945 pi
= current_procinfo
;
1947 if (lseek(pi
->as_fd
, (off_t
) memaddr
, SEEK_SET
) == (off_t
) memaddr
)
1951 nbytes
= write (pi
->as_fd
, myaddr
, len
);
1955 nbytes
= read (pi
->as_fd
, myaddr
, len
);
1969 procfs_store_registers -- copy register values back to inferior
1973 void procfs_store_registers (int regno)
1977 Store our current register values back into the inferior. If
1978 REGNO is -1 then store all the register, otherwise store just
1979 the value specified by REGNO.
1983 If we are storing only a single register, we first have to get all
1984 the current values from the process, overwrite the desired register
1985 in the gregset with the one we want from gdb's registers, and then
1986 send the whole set back to the process. For writing all the
1987 registers, all we have to do is generate the gregset and send it to
1990 Also note that the process has to be stopped on an event of interest
1991 for this to work, which basically means that it has to have been
1992 run under the control of one of the other /proc ioctl calls and not
1993 ptrace. Since we don't use ptrace anyway, we don't worry about this
1994 fine point, but it is worth noting for future reference.
1996 Gdb is confused about what this function is supposed to return.
1997 Some versions return a value, others return nothing. Some are
1998 declared to return a value and actually return nothing. Gdb ignores
1999 anything returned. (FIXME)
2004 procfs_store_registers (regno
)
2007 struct procinfo
*pi
;
2008 #ifdef PROCFS_USE_READ_WRITE
2009 struct greg_ctl greg
;
2010 struct fpreg_ctl fpreg
;
2013 pi
= current_procinfo
;
2015 #ifdef PROCFS_USE_READ_WRITE
2018 procfs_read_status (pi
);
2019 memcpy ((char *) &greg
.gregset
,
2020 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
,
2021 sizeof (gdb_gregset_t
));
2023 fill_gregset (&greg
.gregset
, regno
);
2025 write (pi
->ctl_fd
, &greg
, sizeof (greg
));
2026 #else /* PROCFS_USE_READ_WRITE */
2029 ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
);
2031 fill_gregset (&pi
->gregset
.gregset
, regno
);
2032 ioctl (pi
->ctl_fd
, PIOCSREG
, &pi
->gregset
.gregset
);
2033 #endif /* PROCFS_USE_READ_WRITE */
2035 #if defined (FP0_REGNUM)
2037 /* Now repeat everything using the floating point register set, if the
2038 target has floating point hardware. Since we ignore the returned value,
2039 we'll never know whether it worked or not anyway. */
2041 #ifdef PROCFS_USE_READ_WRITE
2044 procfs_read_status (pi
);
2045 memcpy ((char *) &fpreg
.fpregset
,
2046 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
,
2047 sizeof (gdb_fpregset_t
));
2049 fill_fpregset (&fpreg
.fpregset
, regno
);
2050 fpreg
.cmd
= PCSFPREG
;
2051 write (pi
->ctl_fd
, &fpreg
, sizeof (fpreg
));
2052 #else /* PROCFS_USE_READ_WRITE */
2055 ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
);
2057 fill_fpregset (&pi
->fpregset
.fpregset
, regno
);
2058 ioctl (pi
->ctl_fd
, PIOCSFPREG
, &pi
->fpregset
.fpregset
);
2059 #endif /* PROCFS_USE_READ_WRITE */
2061 #endif /* FP0_REGNUM */
2069 init_procinfo - setup a procinfo struct and connect it to a process
2073 struct procinfo * init_procinfo (int pid)
2077 Allocate a procinfo structure, open the /proc file and then set up the
2078 set of signals and faults that are to be traced. Returns a pointer to
2079 the new procinfo structure.
2083 If proc_init_failed ever gets called, control returns to the command
2084 processing loop via the standard error handling code.
2088 static struct procinfo
*
2089 init_procinfo (pid
, kill
)
2093 struct procinfo
*pi
= (struct procinfo
*)
2094 xmalloc (sizeof (struct procinfo
));
2095 struct sig_ctl sctl
;
2096 struct flt_ctl fctl
;
2098 memset ((char *) pi
, 0, sizeof (*pi
));
2099 if (!open_proc_file (pid
, pi
, O_RDWR
, 1))
2100 proc_init_failed (pi
, "can't open process file", kill
);
2102 /* open_proc_file may modify pid. */
2106 /* Add new process to process info list */
2108 pi
->next
= procinfo_list
;
2111 add_fd (pi
); /* Add to list for poll/select */
2113 /* Remember some things about the inferior that we will, or might, change
2114 so that we can restore them when we detach. */
2116 memcpy ((char *) &pi
->saved_trace
.sigset
,
2117 (char *) &pi
->prstatus
.pr_sigtrace
, sizeof (sigset_t
));
2118 memcpy ((char *) &pi
->saved_fltset
.fltset
,
2119 (char *) &pi
->prstatus
.pr_flttrace
, sizeof (fltset_t
));
2120 memcpy ((char *) &pi
->saved_entryset
.sysset
,
2121 (char *) &pi
->prstatus
.pr_sysentry
, sizeof (sysset_t
));
2122 memcpy ((char *) &pi
->saved_exitset
.sysset
,
2123 (char *) &pi
->prstatus
.pr_sysexit
, sizeof (sysset_t
));
2125 /* Set up trace and fault sets, as gdb expects them. */
2127 prfillset (&sctl
.sigset
);
2128 notice_signals (pi
, &sctl
);
2129 prfillset (&fctl
.fltset
);
2130 prdelset (&fctl
.fltset
, FLTPAGE
);
2132 #else /* ! UNIXWARE */
2133 ioctl (pi
->ctl_fd
, PIOCGTRACE
, &pi
->saved_trace
.sigset
);
2134 ioctl (pi
->ctl_fd
, PIOCGHOLD
, &pi
->saved_sighold
.sigset
);
2135 ioctl (pi
->ctl_fd
, PIOCGFAULT
, &pi
->saved_fltset
.fltset
);
2136 ioctl (pi
->ctl_fd
, PIOCGENTRY
, &pi
->saved_entryset
.sysset
);
2137 ioctl (pi
->ctl_fd
, PIOCGEXIT
, &pi
->saved_exitset
.sysset
);
2139 /* Set up trace and fault sets, as gdb expects them. */
2141 memset ((char *) &pi
->prrun
, 0, sizeof (pi
->prrun
));
2142 prfillset (&pi
->prrun
.pr_trace
);
2143 procfs_notice_signals (pid
);
2144 prfillset (&pi
->prrun
.pr_fault
);
2145 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
2146 #ifdef PROCFS_DONT_TRACE_FAULTS
2147 premptyset (&pi
->prrun
.pr_fault
);
2149 #endif /* UNIXWARE */
2151 if (!procfs_read_status (pi
))
2152 proc_init_failed (pi
, "procfs_read_status failed", kill
);
2161 create_procinfo - initialize access to a /proc entry
2165 struct procinfo * create_procinfo (int pid)
2169 Allocate a procinfo structure, open the /proc file and then set up the
2170 set of signals and faults that are to be traced. Returns a pointer to
2171 the new procinfo structure.
2175 If proc_init_failed ever gets called, control returns to the command
2176 processing loop via the standard error handling code.
2180 static struct procinfo
*
2181 create_procinfo (pid
)
2184 struct procinfo
*pi
;
2185 struct sig_ctl sctl
;
2186 struct flt_ctl fctl
;
2188 pi
= find_procinfo (pid
, 1);
2190 return pi
; /* All done! It already exists */
2192 pi
= init_procinfo (pid
, 1);
2195 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2196 already stopped, even if they all have PR_ASYNC set. */
2197 if (!(pi
->prstatus
.pr_flags
& PR_STOPPED
))
2199 if (!procfs_write_pcwstop (pi
))
2200 proc_init_failed (pi
, "procfs_write_pcwstop failed", 1);
2202 #ifdef PROCFS_USE_READ_WRITE
2203 fctl
.cmd
= PCSFAULT
;
2204 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
2205 proc_init_failed (pi
, "PCSFAULT failed", 1);
2207 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
) < 0)
2208 proc_init_failed (pi
, "PIOCSFAULT failed", 1);
2218 procfs_exit_handler - handle entry into the _exit syscall
2222 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2226 This routine is called when an inferior process enters the _exit()
2227 system call. It continues the process, and then collects the exit
2228 status and pid which are returned in *statvalp and *rtnvalp. After
2229 that it returns non-zero to indicate that procfs_wait should wake up.
2232 There is probably a better way to do this.
2237 procfs_exit_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2238 struct procinfo
*pi
;
2244 struct procinfo
*temp_pi
, *next_pi
;
2245 struct proc_ctl pctl
;
2249 pctl
.data
= PRCFAULT
;
2251 pi
->prrun
.pr_flags
= PRCFAULT
;
2254 #ifdef PROCFS_USE_READ_WRITE
2255 if (write (pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
2257 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2259 perror_with_name (pi
->pathname
);
2263 /* Claim it exited (don't call wait). */
2265 printf_filtered ("(attached process has exited)\n");
2267 *rtnvalp
= inferior_pid
;
2271 *rtnvalp
= wait (statvalp
);
2276 /* Close ALL open proc file handles,
2277 except the one that called SYS_exit. */
2278 for (temp_pi
= procinfo_list
; temp_pi
; temp_pi
= next_pi
)
2280 next_pi
= temp_pi
->next
;
2282 continue; /* Handled below */
2283 close_proc_file (temp_pi
);
2292 procfs_exec_handler - handle exit from the exec family of syscalls
2296 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2300 This routine is called when an inferior process is about to finish any
2301 of the exec() family of system calls. It pretends that we got a
2302 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2303 to tell procfs_wait to wake up.
2306 This need for compatibility with ptrace is questionable. In the
2307 future, it shouldn't be necessary.
2312 procfs_exec_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2313 struct procinfo
*pi
;
2319 *statvalp
= (SIGTRAP
<< 8) | 0177;
2324 #if defined(SYS_sproc) && !defined(UNIXWARE)
2325 /* IRIX lwp creation system call */
2331 procfs_sproc_handler - handle exit from the sproc syscall
2335 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2339 This routine is called when an inferior process is about to finish an
2340 sproc() system call. This is the system call that IRIX uses to create
2341 a lightweight process. When the target process gets this event, we can
2342 look at rval1 to find the new child processes ID, and create a new
2343 procinfo struct from that.
2345 After that, it pretends that we got a SIGTRAP, and returns non-zero
2346 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2347 woken up, sees the new process and continues it.
2350 We actually never see the child exiting from sproc because we will
2351 shortly stop the child with PIOCSTOP, which is then registered as the
2356 procfs_sproc_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2357 struct procinfo
*pi
;
2363 /* We've just detected the completion of an sproc system call. Now we need to
2364 setup a procinfo struct for this thread, and notify the thread system of the
2367 /* If sproc failed, then nothing interesting happened. Continue the process
2368 and go back to sleep. */
2370 if (pi
->prstatus
.pr_errno
!= 0)
2372 pi
->prrun
.pr_flags
&= PRSTEP
;
2373 pi
->prrun
.pr_flags
|= PRCFAULT
;
2375 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2376 perror_with_name (pi
->pathname
);
2381 /* At this point, the new thread is stopped at it's first instruction, and
2382 the parent is stopped at the exit from sproc. */
2384 /* Notify the caller of the arrival of a new thread. */
2385 create_procinfo (pi
->prstatus
.pr_rval1
);
2387 *rtnvalp
= pi
->prstatus
.pr_rval1
;
2388 *statvalp
= (SIGTRAP
<< 8) | 0177;
2397 procfs_fork_handler - handle exit from the fork syscall
2401 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2405 This routine is called when an inferior process is about to finish a
2406 fork() system call. We will open up the new process, and then close
2407 it, which releases it from the clutches of the debugger.
2409 After that, we continue the target process as though nothing had
2413 This is necessary for IRIX because we have to set PR_FORK in order
2414 to catch the creation of lwps (via sproc()). When an actual fork
2415 occurs, it becomes necessary to reset the forks debugger flags and
2416 continue it because we can't hack multiple processes yet.
2420 procfs_fork_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2421 struct procinfo
*pi
;
2427 struct procinfo
*pitemp
;
2429 /* At this point, we've detected the completion of a fork (or vfork) call in
2430 our child. The grandchild is also stopped because we set inherit-on-fork
2431 earlier. (Note that nobody has the grandchilds' /proc file open at this
2432 point.) We will release the grandchild from the debugger by opening it's
2433 /proc file and then closing it. Since run-on-last-close is set, the
2434 grandchild continues on its' merry way. */
2437 pitemp
= create_procinfo (pi
->prstatus
.pr_rval1
);
2439 close_proc_file (pitemp
);
2441 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2442 perror_with_name (pi
->pathname
);
2446 #endif /* SYS_sproc && !UNIXWARE */
2452 procfs_set_inferior_syscall_traps - setup the syscall traps
2456 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2460 Called for each "procinfo" (process, thread, or LWP) in the
2461 inferior, to register for notification of and handlers for
2462 syscall traps in the inferior.
2467 procfs_set_inferior_syscall_traps (pip
)
2468 struct procinfo
*pip
;
2470 procfs_set_syscall_trap (pip
, SYS_exit
, PROCFS_SYSCALL_ENTRY
,
2471 procfs_exit_handler
);
2473 #ifndef PRFS_STOPEXEC
2475 procfs_set_syscall_trap (pip
, SYS_exec
, PROCFS_SYSCALL_EXIT
,
2476 procfs_exec_handler
);
2479 procfs_set_syscall_trap (pip
, SYS_execv
, PROCFS_SYSCALL_EXIT
,
2480 procfs_exec_handler
);
2483 procfs_set_syscall_trap (pip
, SYS_execve
, PROCFS_SYSCALL_EXIT
,
2484 procfs_exec_handler
);
2486 #endif /* PRFS_STOPEXEC */
2488 /* Setup traps on exit from sproc() */
2491 procfs_set_syscall_trap (pip
, SYS_sproc
, PROCFS_SYSCALL_EXIT
,
2492 procfs_sproc_handler
);
2493 procfs_set_syscall_trap (pip
, SYS_fork
, PROCFS_SYSCALL_EXIT
,
2494 procfs_fork_handler
);
2496 procfs_set_syscall_trap (pip
, SYS_vfork
, PROCFS_SYSCALL_EXIT
,
2497 procfs_fork_handler
);
2499 /* Turn on inherit-on-fork flag so that all children of the target process
2500 start with tracing flags set. This allows us to trap lwp creation. Note
2501 that we also have to trap on fork and vfork in order to disable all tracing
2502 in the targets child processes. */
2504 modify_inherit_on_fork_flag (pip
->ctl_fd
, 1);
2507 #ifdef SYS_lwp_create
2508 procfs_set_syscall_trap (pip
, SYS_lwp_create
, PROCFS_SYSCALL_EXIT
,
2509 procfs_lwp_creation_handler
);
2517 procfs_init_inferior - initialize target vector and access to a
2522 void procfs_init_inferior (int pid)
2526 When gdb starts an inferior, this function is called in the parent
2527 process immediately after the fork. It waits for the child to stop
2528 on the return from the exec system call (the child itself takes care
2529 of ensuring that this is set up), then sets up the set of signals
2530 and faults that are to be traced. Returns the pid, which may have had
2531 the thread-id added to it.
2535 If proc_init_failed ever gets called, control returns to the command
2536 processing loop via the standard error handling code.
2541 procfs_init_inferior (pid
)
2544 struct procinfo
*pip
;
2546 push_target (&procfs_ops
);
2548 pip
= create_procinfo (pid
);
2550 procfs_set_inferior_syscall_traps (pip
);
2552 /* create_procinfo may change the pid, so we have to update inferior_pid
2553 here before calling other gdb routines that need the right pid. */
2558 add_thread (pip
-> pid
); /* Setup initial thread */
2560 #ifdef START_INFERIOR_TRAPS_EXPECTED
2561 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
2563 /* One trap to exec the shell, one to exec the program being debugged. */
2564 startup_inferior (2);
2572 procfs_notice_signals
2576 static void procfs_notice_signals (int pid);
2580 When the user changes the state of gdb's signal handling via the
2581 "handle" command, this function gets called to see if any change
2582 in the /proc interface is required. It is also called internally
2583 by other /proc interface functions to initialize the state of
2584 the traced signal set.
2586 One thing it does is that signals for which the state is "nostop",
2587 "noprint", and "pass", have their trace bits reset in the pr_trace
2588 field, so that they are no longer traced. This allows them to be
2589 delivered directly to the inferior without the debugger ever being
2594 procfs_notice_signals (pid
)
2597 struct procinfo
*pi
;
2598 struct sig_ctl sctl
;
2600 pi
= find_procinfo (pid
, 0);
2603 premptyset (&sctl
.sigset
);
2605 sctl
.sigset
= pi
->prrun
.pr_trace
;
2608 notice_signals (pi
, &sctl
);
2611 pi
->prrun
.pr_trace
= sctl
.sigset
;
2616 notice_signals (pi
, sctl
)
2617 struct procinfo
*pi
;
2618 struct sig_ctl
*sctl
;
2622 for (signo
= 0; signo
< NSIG
; signo
++)
2624 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
2625 signal_print_state (target_signal_from_host (signo
)) == 0 &&
2626 signal_pass_state (target_signal_from_host (signo
)) == 1)
2628 prdelset (&sctl
->sigset
, signo
);
2632 praddset (&sctl
->sigset
, signo
);
2635 #ifdef PROCFS_USE_READ_WRITE
2636 sctl
->cmd
= PCSTRACE
;
2637 if (write (pi
->ctl_fd
, (char *) sctl
, sizeof (struct sig_ctl
)) < 0)
2639 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &sctl
->sigset
))
2642 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2650 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2654 void proc_set_exec_trap (void)
2658 This function is called in the child process when starting up
2659 an inferior, prior to doing the exec of the actual inferior.
2660 It sets the child process's exitset to make exit from the exec
2661 system call an event of interest to stop on, and then simply
2662 returns. The child does the exec, the system call returns, and
2663 the child stops at the first instruction, ready for the gdb
2664 parent process to take control of it.
2668 We need to use all local variables since the child may be sharing
2669 it's data space with the parent, if vfork was used rather than
2672 Also note that we want to turn off the inherit-on-fork flag in
2673 the child process so that any grand-children start with all
2674 tracing flags cleared.
2678 proc_set_exec_trap ()
2680 struct sys_ctl exitset
;
2681 struct sys_ctl entryset
;
2682 char procname
[MAX_PROC_NAME_SIZE
];
2685 sprintf (procname
, CTL_PROC_NAME_FMT
, getpid ());
2687 if ((fd
= open (procname
, O_WRONLY
)) < 0)
2689 if ((fd
= open (procname
, O_RDWR
)) < 0)
2693 gdb_flush (gdb_stderr
);
2696 premptyset (&exitset
.sysset
);
2697 premptyset (&entryset
.sysset
);
2699 #ifdef PRFS_STOPEXEC
2700 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2701 exits from exec system calls because of the user level loader. */
2705 if (ioctl (fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
2708 gdb_flush (gdb_stderr
);
2711 prfs_flags
|= PRFS_STOPEXEC
;
2712 if (ioctl (fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
2715 gdb_flush (gdb_stderr
);
2719 #else /* PRFS_STOPEXEC */
2721 Not all systems with /proc have all the exec* syscalls with the same
2722 names. On the SGI, for example, there is no SYS_exec, but there
2723 *is* a SYS_execv. So, we try to account for that. */
2726 praddset (&exitset
.sysset
, SYS_exec
);
2729 praddset (&exitset
.sysset
, SYS_execve
);
2732 praddset (&exitset
.sysset
, SYS_execv
);
2735 #ifdef PROCFS_USE_READ_WRITE
2736 exitset
.cmd
= PCSEXIT
;
2737 if (write (fd
, (char *) &exitset
, sizeof (struct sys_ctl
)) < 0)
2739 if (ioctl (fd
, PIOCSEXIT
, &exitset
.sysset
) < 0)
2743 gdb_flush (gdb_stderr
);
2746 #endif /* PRFS_STOPEXEC */
2748 praddset (&entryset
.sysset
, SYS_exit
);
2750 #ifdef PROCFS_USE_READ_WRITE
2751 entryset
.cmd
= PCSENTRY
;
2752 if (write (fd
, (char *) &entryset
, sizeof (struct sys_ctl
)) < 0)
2754 if (ioctl (fd
, PIOCSENTRY
, &entryset
.sysset
) < 0)
2758 gdb_flush (gdb_stderr
);
2762 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2763 start with tracing flags cleared. */
2765 modify_inherit_on_fork_flag (fd
, 0);
2767 /* Turn on run-on-last-close flag so that this process will not hang
2768 if GDB goes away for some reason. */
2770 modify_run_on_last_close_flag (fd
, 1);
2772 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2773 /* NOTE: revisit when doing thread support for UW */
2777 struct proc_ctl pctl
;
2779 /* Solaris needs this to make procfs treat all threads seperately. Without
2780 this, all threads halt whenever something happens to any thread. Since
2781 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2783 pr_flags
= PR_ASYNC
;
2784 #ifdef PROCFS_USE_READ_WRITE
2786 pctl
.data
= PR_FORK
|PR_ASYNC
;
2787 write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
));
2789 ioctl (fd
, PIOCSET
, &pr_flags
);
2792 #endif /* PR_ASYNC */
2793 #endif /* !UNIXWARE */
2800 proc_iterate_over_mappings -- call function for every mapped space
2804 int proc_iterate_over_mappings (int (*func)())
2808 Given a pointer to a function, call that function for every
2809 mapped address space, passing it an open file descriptor for
2810 the file corresponding to that mapped address space (if any)
2811 and the base address of the mapped space. Quit when we hit
2812 the end of the mappings or the function returns nonzero.
2817 proc_iterate_over_mappings (func
)
2818 int (*func
) PARAMS ((int, CORE_ADDR
));
2825 struct procinfo
*pi
;
2828 pi
= current_procinfo
;
2830 if (fstat (pi
->map_fd
, &sbuf
) < 0)
2833 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
2834 prmaps
= (prmap_t
*) alloca (nmap
* sizeof(prmap_t
));
2835 if ((lseek (pi
->map_fd
, 0, SEEK_SET
) == 0) &&
2836 (read (pi
->map_fd
, (char *) prmaps
, nmap
* sizeof (prmap_t
)) ==
2837 (nmap
* sizeof (prmap_t
))))
2840 for (prmap
= prmaps
; i
< nmap
&& funcstat
== 0; ++prmap
, ++i
)
2842 char name
[sizeof ("/proc/1234567890/object") +
2843 sizeof (prmap
->pr_mapname
)];
2844 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, prmap
->pr_mapname
);
2845 if ((fd
= open (name
, O_RDONLY
)) == -1)
2850 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
->pr_vaddr
);
2856 #else /* UNIXWARE */
2858 proc_iterate_over_mappings (func
)
2859 int (*func
) PARAMS ((int, CORE_ADDR
));
2864 struct prmap
*prmaps
;
2865 struct prmap
*prmap
;
2866 struct procinfo
*pi
;
2868 pi
= current_procinfo
;
2870 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2872 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2873 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2875 for (prmap
= prmaps
; prmap
-> pr_size
&& funcstat
== 0; ++prmap
)
2877 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
-> pr_vaddr
, 0);
2878 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
-> pr_vaddr
);
2885 #endif /* UNIXWARE */
2887 #if 0 /* Currently unused */
2892 proc_base_address -- find base address for segment containing address
2896 CORE_ADDR proc_base_address (CORE_ADDR addr)
2900 Given an address of a location in the inferior, find and return
2901 the base address of the mapped segment containing that address.
2903 This is used for example, by the shared library support code,
2904 where we have the pc value for some location in the shared library
2905 where we are stopped, and need to know the base address of the
2906 segment containing that address.
2910 proc_base_address (addr
)
2914 struct prmap
*prmaps
;
2915 struct prmap
*prmap
;
2916 CORE_ADDR baseaddr
= 0;
2917 struct procinfo
*pi
;
2919 pi
= current_procinfo
;
2921 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2923 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2924 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2926 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
2928 if ((prmap
-> pr_vaddr
<= (caddr_t
) addr
) &&
2929 (prmap
-> pr_vaddr
+ prmap
-> pr_size
> (caddr_t
) addr
))
2931 baseaddr
= (CORE_ADDR
) prmap
-> pr_vaddr
;
2947 proc_address_to_fd -- return open fd for file mapped to address
2951 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2955 Given an address in the current inferior's address space, use the
2956 /proc interface to find an open file descriptor for the file that
2957 this address was mapped in from. Return -1 if there is no current
2958 inferior. Print a warning message if there is an inferior but
2959 the address corresponds to no file (IE a bogus address).
2964 proc_address_to_fd (pi
, addr
, complain
)
2965 struct procinfo
*pi
;
2971 if ((fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, (caddr_t
*) &addr
)) < 0)
2975 print_sys_errmsg (pi
->pathname
, errno
);
2976 warning ("can't find mapped file for address 0x%x", addr
);
2981 #endif /* !UNIXWARE */
2983 /* Attach to process PID, then initialize for debugging it
2984 and wait for the trace-trap that results from attaching. */
2987 procfs_attach (args
, from_tty
)
2995 error_no_arg ("process-id to attach");
2999 if (pid
== getpid()) /* Trying to masturbate? */
3000 error ("I refuse to debug myself!");
3004 exec_file
= (char *) get_exec_file (0);
3007 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
3009 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid
));
3011 gdb_flush (gdb_stdout
);
3014 inferior_pid
= pid
= do_attach (pid
);
3015 push_target (&procfs_ops
);
3019 /* Take a program previously attached to and detaches it.
3020 The program resumes execution and will no longer stop
3021 on signals, etc. We'd better not have left any breakpoints
3022 in the program or it'll die when it hits one. For this
3023 to work, it may be necessary for the process to have been
3024 previously attached. It *might* work if the program was
3025 started via the normal ptrace (PTRACE_TRACEME). */
3028 procfs_detach (args
, from_tty
)
3036 char *exec_file
= get_exec_file (0);
3039 printf_unfiltered ("Detaching from program: %s %s\n",
3040 exec_file
, target_pid_to_str (inferior_pid
));
3041 gdb_flush (gdb_stdout
);
3044 siggnal
= atoi (args
);
3046 do_detach (siggnal
);
3048 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
3051 /* Get ready to modify the registers array. On machines which store
3052 individual registers, this doesn't need to do anything. On machines
3053 which store all the registers in one fell swoop, this makes sure
3054 that registers contains all the registers from the program being
3058 procfs_prepare_to_store ()
3060 #ifdef CHILD_PREPARE_TO_STORE
3061 CHILD_PREPARE_TO_STORE ();
3065 /* Print status information about what we're accessing. */
3068 procfs_files_info (ignore
)
3069 struct target_ops
*ignore
;
3071 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3072 attach_flag
? "attached": "child", target_pid_to_str (inferior_pid
));
3077 procfs_open (arg
, from_tty
)
3081 error ("Use the \"run\" command to start a Unix child process.");
3088 do_attach -- attach to an already existing process
3092 int do_attach (int pid)
3096 Attach to an already existing process with the specified process
3097 id. If the process is not already stopped, query whether to
3102 The option of stopping at attach time is specific to the /proc
3103 versions of gdb. Versions using ptrace force the attachee
3104 to stop. (I have changed this version to do so, too. All you
3105 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3113 struct procinfo
*pi
;
3114 struct sig_ctl sctl
;
3115 struct flt_ctl fctl
;
3118 pi
= init_procinfo (pid
, 0);
3121 nlwp
= pi
->prstatus
.pr_nlwp
;
3122 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (id_t
));
3124 if (ioctl (pi
->ctl_fd
, PIOCLWPIDS
, lwps
))
3126 print_sys_errmsg (pi
-> pathname
, errno
);
3127 error ("PIOCLWPIDS failed");
3129 #else /* PIOCLWPIDS */
3131 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
3134 for (; nlwp
> 0; nlwp
--, lwps
++)
3136 /* First one has already been created above. */
3137 if ((pi
= find_procinfo ((*lwps
<< 16) | pid
, 1)) == 0)
3138 pi
= init_procinfo ((*lwps
<< 16) | pid
, 0);
3141 if (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3143 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3146 pi
->was_stopped
= 1;
3150 pi
->was_stopped
= 0;
3151 if (1 || query ("Process is currently running, stop it? "))
3154 /* Make it run again when we close it. */
3155 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3156 #ifdef PROCFS_USE_READ_WRITE
3158 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3160 if (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
3163 print_sys_errmsg (pi
->pathname
, errno
);
3164 close_proc_file (pi
);
3165 error ("PIOCSTOP failed");
3168 if (!procfs_read_status (pi
))
3170 print_sys_errmsg (pi
->pathname
, errno
);
3171 close_proc_file (pi
);
3172 error ("procfs_read_status failed");
3175 pi
->nopass_next_sigstop
= 1;
3179 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3180 target_pid_to_str (pi
->pid
));
3184 #ifdef PROCFS_USE_READ_WRITE
3185 fctl
.cmd
= PCSFAULT
;
3186 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
3187 print_sys_errmsg ("PCSFAULT failed", errno
);
3188 #else /* PROCFS_USE_READ_WRITE */
3189 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
3191 print_sys_errmsg ("PIOCSFAULT failed", errno
);
3193 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
3195 print_sys_errmsg ("PIOCSTRACE failed", errno
);
3197 add_thread (pi
->pid
);
3198 procfs_set_inferior_syscall_traps (pi
);
3199 #endif /* PROCFS_USE_READ_WRITE */
3209 do_detach -- detach from an attached-to process
3213 void do_detach (int signal)
3217 Detach from the current attachee.
3219 If signal is non-zero, the attachee is started running again and sent
3220 the specified signal.
3222 If signal is zero and the attachee was not already stopped when we
3223 attached to it, then we make it runnable again when we detach.
3225 Otherwise, we query whether or not to make the attachee runnable
3226 again, since we may simply want to leave it in the state it was in
3229 We report any problems, but do not consider them errors, since we
3230 MUST detach even if some things don't seem to go right. This may not
3231 be the ideal situation. (FIXME).
3238 struct procinfo
*pi
;
3240 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3244 set_proc_siginfo (pi
, signal
);
3246 #ifdef PROCFS_USE_READ_WRITE
3247 pi
->saved_exitset
.cmd
= PCSEXIT
;
3248 if (write (pi
->ctl_fd
, (char *) &pi
->saved_exitset
,
3249 sizeof (struct sys_ctl
)) < 0)
3251 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &pi
->saved_exitset
.sysset
) < 0)
3254 print_sys_errmsg (pi
->pathname
, errno
);
3255 printf_unfiltered ("PIOCSEXIT failed.\n");
3257 #ifdef PROCFS_USE_READ_WRITE
3258 pi
->saved_entryset
.cmd
= PCSENTRY
;
3259 if (write (pi
->ctl_fd
, (char *) &pi
->saved_entryset
,
3260 sizeof (struct sys_ctl
)) < 0)
3262 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &pi
->saved_entryset
.sysset
) < 0)
3265 print_sys_errmsg (pi
->pathname
, errno
);
3266 printf_unfiltered ("PIOCSENTRY failed.\n");
3268 #ifdef PROCFS_USE_READ_WRITE
3269 pi
->saved_trace
.cmd
= PCSTRACE
;
3270 if (write (pi
->ctl_fd
, (char *) &pi
->saved_trace
,
3271 sizeof (struct sig_ctl
)) < 0)
3273 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->saved_trace
.sigset
) < 0)
3276 print_sys_errmsg (pi
->pathname
, errno
);
3277 printf_unfiltered ("PIOCSTRACE failed.\n");
3280 if (ioctl (pi
->ctl_fd
, PIOCSHOLD
, &pi
->saved_sighold
.sigset
) < 0)
3282 print_sys_errmsg (pi
->pathname
, errno
);
3283 printf_unfiltered ("PIOSCHOLD failed.\n");
3286 #ifdef PROCFS_USE_READ_WRITE
3287 pi
->saved_fltset
.cmd
= PCSFAULT
;
3288 if (write (pi
->ctl_fd
, (char *) &pi
->saved_fltset
,
3289 sizeof (struct flt_ctl
)) < 0)
3291 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->saved_fltset
.fltset
) < 0)
3294 print_sys_errmsg (pi
->pathname
, errno
);
3295 printf_unfiltered ("PIOCSFAULT failed.\n");
3297 if (!procfs_read_status (pi
))
3299 print_sys_errmsg (pi
->pathname
, errno
);
3300 printf_unfiltered ("procfs_read_status failed.\n");
3305 if (signal
|| (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3307 if (signal
|| (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3311 struct proc_ctl pctl
;
3313 if (signal
|| !pi
->was_stopped
||
3314 query ("Was stopped when attached, make it runnable again? "))
3316 /* Clear any pending signal if we want to detach without
3319 set_proc_siginfo (pi
, signal
);
3321 /* Clear any fault that might have stopped it. */
3322 #ifdef PROCFS_USE_READ_WRITE
3324 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3326 if (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0))
3329 print_sys_errmsg (pi
->pathname
, errno
);
3330 printf_unfiltered ("PIOCCFAULT failed.\n");
3333 /* Make it run again when we close it. */
3335 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3339 close_proc_file (pi
);
3344 /* emulate wait() as much as possible.
3345 Wait for child to do something. Return pid of child, or -1 in case
3346 of error; store status in *OURSTATUS.
3348 Not sure why we can't
3349 just use wait(), but it seems to have problems when applied to a
3350 process being controlled with the /proc interface.
3352 We have a race problem here with no obvious solution. We need to let
3353 the inferior run until it stops on an event of interest, which means
3354 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3355 ioctl if the process is already stopped on something that is not an
3356 event of interest, or the call will hang indefinitely. Thus we first
3357 use PIOCSTATUS to see if the process is not stopped. If not, then we
3358 use PIOCWSTOP. But during the window between the two, if the process
3359 stops for any reason that is not an event of interest (such as a job
3360 control signal) then gdb will hang. One possible workaround is to set
3361 an alarm to wake up every minute of so and check to see if the process
3362 is still running, and if so, then reissue the PIOCWSTOP. But this is
3363 a real kludge, so has not been implemented. FIXME: investigate
3366 FIXME: Investigate why wait() seems to have problems with programs
3367 being control by /proc routines. */
3369 procfs_wait (pid
, ourstatus
)
3371 struct target_waitstatus
*ourstatus
;
3378 struct procinfo
*pi
;
3379 struct proc_ctl pctl
;
3383 /* handle all syscall events first, otherwise we might not
3384 notice a thread was created until too late. */
3386 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3392 if (! (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)) )
3395 why
= pi
->prstatus
.pr_lwp
.pr_why
;
3396 what
= pi
->prstatus
.pr_lwp
.pr_what
;
3398 if (! (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)) )
3401 why
= pi
->prstatus
.pr_why
;
3402 what
= pi
->prstatus
.pr_what
;
3404 if (why
== PR_SYSENTRY
|| why
== PR_SYSEXIT
)
3407 int found_handler
= 0;
3409 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
3410 if (pi
->syscall_handlers
[i
].syscall_num
== what
)
3413 pi
->saved_rtnval
= pi
->pid
;
3414 pi
->saved_statval
= 0;
3415 if (!pi
->syscall_handlers
[i
].func
3416 (pi
, what
, why
, &pi
->saved_rtnval
, &pi
->saved_statval
))
3423 if (why
== PR_SYSENTRY
)
3424 error ("PR_SYSENTRY, unhandled system call %d", what
);
3426 error ("PR_SYSEXIT, unhandled system call %d", what
);
3431 /* find a relevant process with an event */
3433 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3434 if (pi
->had_event
&& (pid
== -1 || pi
->pid
== pid
))
3444 if (!checkerr
&& !(pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3446 if (!checkerr
&& !(pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3449 if (!procfs_write_pcwstop (pi
))
3456 if (errno
== ENOENT
)
3458 /* XXX Fixme -- what to do if attached? Can't call wait... */
3459 rtnval
= wait (&statval
);
3460 if ((rtnval
) != (PIDGET (inferior_pid
)))
3462 print_sys_errmsg (pi
->pathname
, errno
);
3463 error ("procfs_wait: wait failed, returned %d", rtnval
);
3469 print_sys_errmsg (pi
->pathname
, errno
);
3470 error ("PIOCSTATUS or PIOCWSTOP failed.");
3475 else if (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3477 else if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3481 rtnval
= pi
->prstatus
.pr_pid
;
3482 why
= pi
->prstatus
.pr_lwp
.pr_why
;
3483 what
= pi
->prstatus
.pr_lwp
.pr_what
;
3486 why
= pi
->prstatus
.pr_why
;
3487 what
= pi
->prstatus
.pr_what
;
3493 statval
= (what
<< 8) | 0177;
3497 rtnval
= pi
->saved_rtnval
;
3498 statval
= pi
->saved_statval
;
3501 statval
= (SIGSTOP
<< 8) | 0177;
3504 statval
= (what
<< 8) | 0177;
3511 statval
= (SIGTRAP
<< 8) | 0177;
3516 statval
= (SIGTRAP
<< 8) | 0177;
3519 #ifndef FAULTED_USE_SIGINFO
3520 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3521 Solaris fills in si_signo. I'm not sure about others. */
3524 statval
= (SIGILL
<< 8) | 0177;
3528 statval
= (SIGTRAP
<< 8) | 0177;
3533 statval
= (SIGSEGV
<< 8) | 0177;
3538 statval
= (SIGFPE
<< 8) | 0177;
3540 case FLTPAGE
: /* Recoverable page fault */
3541 #endif /* not FAULTED_USE_SIGINFO */
3543 /* Use the signal which the kernel assigns. This is better than
3544 trying to second-guess it from the fault. In fact, I suspect
3545 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3547 statval
= ((pi
->prstatus
.pr_lwp
.pr_info
.si_signo
) << 8) | 0177;
3549 statval
= ((pi
->prstatus
.pr_info
.si_signo
) << 8) | 0177;
3555 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
3557 /* Stop all the other threads when any of them stops. */
3560 struct procinfo
*procinfo
, *next_pi
;
3562 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3564 next_pi
= procinfo
->next
;
3565 if (!procinfo
->had_event
)
3567 #ifdef PROCFS_USE_READ_WRITE
3569 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3571 print_sys_errmsg (procinfo
->pathname
, errno
);
3572 error ("PCSTOP failed");
3575 /* A bug in Solaris (2.5) causes us to hang when trying to
3576 stop a stopped process. So, we have to check first in
3577 order to avoid the hang. */
3578 if (!procfs_read_status (procinfo
))
3580 /* The LWP has apparently terminated. */
3582 printf_filtered ("LWP %d doesn't respond.\n",
3583 (procinfo
->pid
>> 16) & 0xffff);
3584 close_proc_file (procinfo
);
3588 if (!(procinfo
->prstatus
.pr_flags
& PR_STOPPED
))
3589 if (ioctl (procinfo
->ctl_fd
, PIOCSTOP
, &procinfo
->prstatus
)
3592 print_sys_errmsg (procinfo
->pathname
, errno
);
3593 warning ("PIOCSTOP failed");
3602 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3604 pi
->prstatus
.pr_lwp
.pr_flags
);
3606 pi
->prstatus
.pr_flags
);
3610 store_waitstatus (ourstatus
, statval
);
3612 if (rtnval
== -1) /* No more children to wait for */
3614 warning ("Child process unexpectedly missing");
3615 /* Claim it exited with unknown signal. */
3616 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3617 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
3621 pi
->had_event
= 0; /* Indicate that we've seen this one */
3629 set_proc_siginfo - set a process's current signal info
3633 void set_proc_siginfo (struct procinfo *pip, int signo);
3637 Given a pointer to a process info struct in PIP and a signal number
3638 in SIGNO, set the process's current signal and its associated signal
3639 information. The signal will be delivered to the process immediately
3640 after execution is resumed, even if it is being held. In addition,
3641 this particular delivery will not cause another PR_SIGNALLED stop
3642 even if the signal is being traced.
3644 If we are not delivering the same signal that the prstatus siginfo
3645 struct contains information about, then synthesize a siginfo struct
3646 to match the signal we are doing to deliver, make it of the type
3647 "generated by a user process", and send this synthesized copy. When
3648 used to set the inferior's signal state, this will be required if we
3649 are not currently stopped because of a traced signal, or if we decide
3650 to continue with a different signal.
3652 Note that when continuing the inferior from a stop due to receipt
3653 of a traced signal, we either have set PRCSIG to clear the existing
3654 signal, or we have to call this function to do a PIOCSSIG with either
3655 the existing siginfo struct from pr_info, or one we have synthesized
3656 appropriately for the signal we want to deliver. Otherwise if the
3657 signal is still being traced, the inferior will immediately stop
3660 See siginfo(5) for more details.
3664 set_proc_siginfo (pip
, signo
)
3665 struct procinfo
*pip
;
3668 struct siginfo newsiginfo
;
3669 struct siginfo
*sip
;
3670 struct sigi_ctl sictl
;
3672 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3673 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3674 receives a PIOCSSIG with a signal identical to the current signal,
3675 it messes up the current signal. Work around the kernel bug. */
3677 if (signo
== pip
-> prstatus
.pr_lwp
.pr_cursig
)
3679 if (signo
== pip
-> prstatus
.pr_cursig
)
3685 if (signo
== pip
->prstatus
.pr_lwp
.pr_info
.si_signo
)
3687 memcpy ((char *) &sictl
.siginfo
, (char *) &pip
->prstatus
.pr_lwp
.pr_info
,
3688 sizeof (siginfo_t
));
3691 if (signo
== pip
-> prstatus
.pr_info
.si_signo
)
3693 sip
= &pip
-> prstatus
.pr_info
;
3699 siginfo_t
*sip
= &sictl
.siginfo
;
3700 memset ((char *) sip
, 0, sizeof (siginfo_t
));
3702 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
3705 sip
-> si_signo
= signo
;
3707 sip
-> si_errno
= 0;
3708 sip
-> si_pid
= getpid ();
3709 sip
-> si_uid
= getuid ();
3711 #ifdef PROCFS_USE_READ_WRITE
3713 if (write (pip
->ctl_fd
, (char *) &sictl
, sizeof (struct sigi_ctl
)) < 0)
3715 if (ioctl (pip
->ctl_fd
, PIOCSSIG
, sip
) < 0)
3718 print_sys_errmsg (pip
-> pathname
, errno
);
3719 warning ("PIOCSSIG failed");
3723 /* Resume execution of process PID. If STEP is nozero, then
3724 just single step it. If SIGNAL is nonzero, restart it with that
3725 signal activated. */
3728 procfs_resume (pid
, step
, signo
)
3731 enum target_signal signo
;
3734 struct procinfo
*pi
, *procinfo
, *next_pi
;
3735 struct proc_ctl pctl
;
3737 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
3742 pctl
.data
= PRCFAULT
;
3744 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
3748 /* It should not be necessary. If the user explicitly changes the value,
3749 value_assign calls write_register_bytes, which writes it. */
3750 /* It may not be absolutely necessary to specify the PC value for
3751 restarting, but to be safe we use the value that gdb considers
3752 to be current. One case where this might be necessary is if the
3753 user explicitly changes the PC value that gdb considers to be
3754 current. FIXME: Investigate if this is necessary or not. */
3756 #ifdef PRSVADDR_BROKEN
3757 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3758 place to put nPC. In fact, if you use this, nPC seems to be set to some
3759 random garbage. We have to rely on the fact that PC and nPC have been
3760 written previously via PIOCSREG during a register flush. */
3762 pi
->prrun
.pr_vaddr
= (caddr_t
) *(int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
3763 pi
->prrun
.pr_flags
!= PRSVADDR
;
3767 if (signo
== TARGET_SIGNAL_STOP
&& pi
->nopass_next_sigstop
)
3768 /* When attaching to a child process, if we forced it to stop with
3769 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3770 Upon resuming the first time after such a stop, we explicitly
3771 inhibit sending it another SIGSTOP, which would be the normal
3772 result of default signal handling. One potential drawback to
3773 this is that we will also ignore any attempt to by the user
3774 to explicitly continue after the attach with a SIGSTOP. Ultimately
3775 this problem should be dealt with by making the routines that
3776 deal with the inferior a little smarter, and possibly even allow
3777 an inferior to continue running at the same time as gdb. (FIXME?) */
3779 else if (signo
== TARGET_SIGNAL_TSTP
3781 && pi
->prstatus
.pr_lwp
.pr_cursig
== SIGTSTP
3782 && pi
->prstatus
.pr_lwp
.pr_action
.sa_handler
== SIG_DFL
3784 && pi
->prstatus
.pr_cursig
== SIGTSTP
3785 && pi
->prstatus
.pr_action
.sa_handler
== SIG_DFL
3789 /* We are about to pass the inferior a SIGTSTP whose action is
3790 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3791 (notifying the parent via wait()), and then keep going from the
3792 same place when the parent is ready for you to keep going. So
3793 under the debugger, it should do nothing (as if the program had
3794 been stopped and then later resumed. Under ptrace, this
3795 happens for us, but under /proc, the system obligingly stops
3796 the process, and wait_for_inferior would have no way of
3797 distinguishing that type of stop (which indicates that we
3798 should just start it again), with a stop due to the pr_trace
3799 field of the prrun_t struct.
3801 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3802 because the handler needs to get executed. */
3805 signal_to_pass
= target_signal_to_host (signo
);
3809 set_proc_siginfo (pi
, signal_to_pass
);
3814 pctl
.data
|= PRCSIG
;
3816 pi
->prrun
.pr_flags
|= PRCSIG
;
3819 pi
->nopass_next_sigstop
= 0;
3823 pctl
.data
|= PRSTEP
;
3825 pi
->prrun
.pr_flags
|= PRSTEP
;
3829 /* Don't try to start a process unless it's stopped on an
3830 `event of interest'. Doing so will cause errors. */
3832 if (!procfs_read_status (pi
))
3834 /* The LWP has apparently terminated. */
3836 printf_filtered ("LWP %d doesn't respond.\n",
3837 (pi
->pid
>> 16) & 0xffff);
3838 close_proc_file (pi
);
3842 #ifdef PROCFS_USE_READ_WRITE
3843 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
3845 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
3846 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
3849 /* The LWP has apparently terminated. */
3851 printf_filtered ("LWP %d doesn't respond.\n",
3852 (pi
->pid
>> 16) & 0xffff);
3853 close_proc_file (pi
);
3857 /* Continue all the other threads that haven't had an event of interest.
3858 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3859 set by do_attach, and means this is the first resume after an attach.
3860 All threads were CSTOP'd by do_attach, and should be resumed now. */
3863 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3865 next_pi
= procinfo
->next
;
3867 if (!procinfo
->had_event
||
3868 (procinfo
->nopass_next_sigstop
&& signo
== TARGET_SIGNAL_STOP
))
3870 procinfo
->had_event
= procinfo
->nopass_next_sigstop
= 0;
3871 #ifdef PROCFS_USE_READ_WRITE
3872 pctl
.data
= PRCFAULT
| PRCSIG
;
3873 if (write (procinfo
->ctl_fd
, (char *) &pctl
,
3874 sizeof (struct proc_ctl
)) < 0)
3876 if (!procfs_read_status (procinfo
))
3877 fprintf_unfiltered(gdb_stderr
,
3878 "procfs_read_status failed, errno=%d\n",
3880 print_sys_errmsg (procinfo
->pathname
, errno
);
3881 error ("PCRUN failed");
3884 procinfo
->prrun
.pr_flags
&= PRSTEP
;
3885 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
3886 if (!procfs_read_status (procinfo
))
3888 /* The LWP has apparently terminated. */
3890 printf_filtered ("LWP %d doesn't respond.\n",
3891 (procinfo
->pid
>> 16) & 0xffff);
3892 close_proc_file (procinfo
);
3896 /* Don't try to start a process unless it's stopped on an
3897 `event of interest'. Doing so will cause errors. */
3899 if ((procinfo
->prstatus
.pr_flags
& PR_ISTOP
)
3900 && ioctl (procinfo
->ctl_fd
, PIOCRUN
, &procinfo
->prrun
) < 0)
3902 if (!procfs_read_status (procinfo
))
3903 fprintf_unfiltered(gdb_stderr
,
3904 "procfs_read_status failed, errno=%d\n",
3906 print_sys_errmsg (procinfo
->pathname
, errno
);
3907 warning ("PIOCRUN failed");
3911 procfs_read_status (procinfo
);
3919 procfs_fetch_registers -- fetch current registers from inferior
3923 void procfs_fetch_registers (int regno)
3927 Read the current values of the inferior's registers, both the
3928 general register set and floating point registers (if supported)
3929 and update gdb's idea of their current values.
3934 procfs_fetch_registers (regno
)
3937 struct procinfo
*pi
;
3939 pi
= current_procinfo
;
3942 if (procfs_read_status (pi
))
3944 supply_gregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
3945 #if defined (FP0_REGNUM)
3946 supply_fpregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
);
3949 #else /* UNIXWARE */
3950 if (ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
) != -1)
3952 supply_gregset (&pi
->gregset
.gregset
);
3954 #if defined (FP0_REGNUM)
3955 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
) != -1)
3957 supply_fpregset (&pi
->fpregset
.fpregset
);
3960 #endif /* UNIXWARE */
3967 proc_init_failed - called when /proc access initialization fails
3972 static void proc_init_failed (struct procinfo *pi,
3973 char *why, int kill_p)
3977 This function is called whenever initialization of access to a /proc
3978 entry fails. It prints a suitable error message, does some cleanup,
3979 and then invokes the standard error processing routine which dumps
3980 us back into the command loop. If KILL_P is true, sends SIGKILL.
3984 proc_init_failed (pi
, why
, kill_p
)
3985 struct procinfo
*pi
;
3989 print_sys_errmsg (pi
->pathname
, errno
);
3991 kill (pi
->pid
, SIGKILL
);
3992 close_proc_file (pi
);
4001 close_proc_file - close any currently open /proc entry
4005 static void close_proc_file (struct procinfo *pip)
4009 Close any currently open /proc entry and mark the process information
4010 entry as invalid. In order to ensure that we don't try to reuse any
4011 stale information, the pid, fd, and pathnames are explicitly
4012 invalidated, which may be overkill.
4017 close_proc_file (pip
)
4018 struct procinfo
*pip
;
4020 struct procinfo
*procinfo
;
4022 delete_thread (pip
->pid
); /* remove thread from GDB's thread list */
4023 remove_fd (pip
); /* Remove fd from poll/select list */
4025 close (pip
->ctl_fd
);
4026 #ifdef HAVE_MULTIPLE_PROC_FDS
4028 close (pip
->status_fd
);
4029 close (pip
->map_fd
);
4032 free (pip
-> pathname
);
4034 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4036 if (procinfo_list
== pip
)
4037 procinfo_list
= pip
->next
;
4040 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
4042 if (procinfo
->next
== pip
)
4044 procinfo
->next
= pip
->next
;
4056 open_proc_file - open a /proc entry for a given process id
4060 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4064 Given a process id and a mode, close the existing open /proc
4065 entry (if any) and open one for the new process id, in the
4066 specified mode. Once it is open, then mark the local process
4067 information structure as valid, which guarantees that the pid,
4068 fd, and pathname fields match an open /proc entry. Returns
4069 zero if the open fails, nonzero otherwise.
4071 Note that the pathname is left intact, even when the open fails,
4072 so that callers can use it to construct meaningful error messages
4073 rather than just "file open failed".
4075 Note that for Solaris, the process-id also includes an LWP-id, so we
4076 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4077 then we will ask the kernel what it is and add it to the pid. Hence,
4078 the pid can be changed by us.
4082 open_proc_file (pid
, pip
, mode
, control
)
4084 struct procinfo
*pip
;
4091 pip
-> had_event
= 0;
4092 pip
-> pathname
= xmalloc (MAX_PROC_NAME_SIZE
);
4101 #ifdef HAVE_MULTIPLE_PROC_FDS
4102 sprintf (pip
->pathname
, STATUS_PROC_NAME_FMT
, tmp
);
4103 if ((pip
->status_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4108 sprintf (pip
->pathname
, AS_PROC_NAME_FMT
, tmp
);
4109 if ((pip
->as_fd
= open (pip
->pathname
, O_RDWR
)) < 0)
4111 close (pip
->status_fd
);
4115 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4116 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4118 close (pip
->status_fd
);
4123 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4124 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4126 close (pip
->status_fd
);
4133 sprintf (pip
->pathname
, CTL_PROC_NAME_FMT
, tmp
);
4134 if ((pip
->ctl_fd
= open (pip
->pathname
, O_WRONLY
)) < 0)
4136 close (pip
->status_fd
);
4138 close (pip
->map_fd
);
4143 #else /* HAVE_MULTIPLE_PROC_FDS */
4144 sprintf (pip
-> pathname
, CTL_PROC_NAME_FMT
, tmp
);
4146 if ((tmpfd
= open (pip
-> pathname
, mode
)) < 0)
4150 pip
-> ctl_fd
= tmpfd
;
4151 pip
-> as_fd
= tmpfd
;
4152 pip
-> map_fd
= tmpfd
;
4153 pip
-> status_fd
= tmpfd
;
4155 tmp
= (pid
>> 16) & 0xffff; /* Extract thread id */
4158 { /* Don't know thread id yet */
4159 if (ioctl (tmpfd
, PIOCSTATUS
, &pip
-> prstatus
) < 0)
4161 print_sys_errmsg (pip
-> pathname
, errno
);
4163 error ("open_proc_file: PIOCSTATUS failed");
4166 tmp
= pip
-> prstatus
.pr_who
; /* Get thread id from prstatus_t */
4167 pip
-> pid
= (tmp
<< 16) | pid
; /* Update pip */
4170 if ((pip
-> ctl_fd
= ioctl (tmpfd
, PIOCOPENLWP
, &tmp
)) < 0)
4176 #ifdef PIOCSET /* New method */
4179 pr_flags
= PR_ASYNC
;
4180 ioctl (pip
-> ctl_fd
, PIOCSET
, &pr_flags
);
4184 /* keep extra fds in sync */
4185 pip
->as_fd
= pip
->ctl_fd
;
4186 pip
->map_fd
= pip
->ctl_fd
;
4187 pip
->status_fd
= pip
->ctl_fd
;
4189 close (tmpfd
); /* All done with main pid */
4190 #endif /* PIOCOPENLWP */
4192 #endif /* HAVE_MULTIPLE_PROC_FDS */
4198 mappingflags (flags
)
4201 static char asciiflags
[8];
4203 strcpy (asciiflags
, "-------");
4204 #if defined (MA_PHYS)
4205 if (flags
& MA_PHYS
) asciiflags
[0] = 'd';
4207 if (flags
& MA_STACK
) asciiflags
[1] = 's';
4208 if (flags
& MA_BREAK
) asciiflags
[2] = 'b';
4209 if (flags
& MA_SHARED
) asciiflags
[3] = 's';
4210 if (flags
& MA_READ
) asciiflags
[4] = 'r';
4211 if (flags
& MA_WRITE
) asciiflags
[5] = 'w';
4212 if (flags
& MA_EXEC
) asciiflags
[6] = 'x';
4213 return (asciiflags
);
4217 info_proc_flags (pip
, summary
)
4218 struct procinfo
*pip
;
4221 struct trans
*transp
;
4223 long flags
= pip
->prstatus
.pr_flags
| pip
->prstatus
.pr_lwp
.pr_flags
;
4225 long flags
= pip
->prstatus
.pr_flags
;
4228 printf_filtered ("%-32s", "Process status flags:");
4231 printf_filtered ("\n\n");
4233 for (transp
= pr_flag_table
; transp
-> name
!= NULL
; transp
++)
4235 if (flags
& transp
-> value
)
4239 printf_filtered ("%s ", transp
-> name
);
4243 printf_filtered ("\t%-16s %s.\n", transp
-> name
, transp
-> desc
);
4247 printf_filtered ("\n");
4251 info_proc_stop (pip
, summary
)
4252 struct procinfo
*pip
;
4255 struct trans
*transp
;
4260 why
= pip
-> prstatus
.pr_lwp
.pr_why
;
4261 what
= pip
-> prstatus
.pr_lwp
.pr_what
;
4263 why
= pip
-> prstatus
.pr_why
;
4264 what
= pip
-> prstatus
.pr_what
;
4268 if (pip
-> prstatus
.pr_lwp
.pr_flags
& PR_STOPPED
)
4270 if (pip
-> prstatus
.pr_flags
& PR_STOPPED
)
4273 printf_filtered ("%-32s", "Reason for stopping:");
4276 printf_filtered ("\n\n");
4278 for (transp
= pr_why_table
; transp
-> name
!= NULL
; transp
++)
4280 if (why
== transp
-> value
)
4284 printf_filtered ("%s ", transp
-> name
);
4288 printf_filtered ("\t%-16s %s.\n",
4289 transp
-> name
, transp
-> desc
);
4295 /* Use the pr_why field to determine what the pr_what field means, and
4296 print more information. */
4301 /* pr_what is unused for this case */
4307 printf_filtered ("%s ", signalname (what
));
4311 printf_filtered ("\t%-16s %s.\n", signalname (what
),
4312 safe_strsignal (what
));
4318 printf_filtered ("%s ", syscallname (what
));
4322 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4323 "Entered this system call");
4329 printf_filtered ("%s ", syscallname (what
));
4333 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4334 "Returned from this system call");
4340 printf_filtered ("%s ",
4341 lookupname (faults_table
, what
, "fault"));
4345 printf_filtered ("\t%-16s %s.\n",
4346 lookupname (faults_table
, what
, "fault"),
4347 lookupdesc (faults_table
, what
));
4351 printf_filtered ("\n");
4356 info_proc_siginfo (pip
, summary
)
4357 struct procinfo
*pip
;
4360 struct siginfo
*sip
;
4363 if ((pip
-> prstatus
.pr_lwp
.pr_flags
& PR_STOPPED
) &&
4364 (pip
-> prstatus
.pr_lwp
.pr_why
== PR_SIGNALLED
||
4365 pip
-> prstatus
.pr_lwp
.pr_why
== PR_FAULTED
))
4367 if ((pip
-> prstatus
.pr_flags
& PR_STOPPED
) &&
4368 (pip
-> prstatus
.pr_why
== PR_SIGNALLED
||
4369 pip
-> prstatus
.pr_why
== PR_FAULTED
))
4372 printf_filtered ("%-32s", "Additional signal/fault info:");
4374 sip
= &pip
-> prstatus
.pr_lwp
.pr_info
;
4376 sip
= &pip
-> prstatus
.pr_info
;
4380 printf_filtered ("%s ", signalname (sip
-> si_signo
));
4381 if (sip
-> si_errno
> 0)
4383 printf_filtered ("%s ", errnoname (sip
-> si_errno
));
4385 if (sip
-> si_code
<= 0)
4387 printf_filtered ("sent by %s, uid %d ",
4388 target_pid_to_str (sip
-> si_pid
),
4393 printf_filtered ("%s ", sigcodename (sip
));
4394 if ((sip
-> si_signo
== SIGILL
) ||
4395 (sip
-> si_signo
== SIGFPE
) ||
4396 (sip
-> si_signo
== SIGSEGV
) ||
4397 (sip
-> si_signo
== SIGBUS
))
4399 printf_filtered ("addr=%#lx ",
4400 (unsigned long) sip
-> si_addr
);
4402 else if ((sip
-> si_signo
== SIGCHLD
))
4404 printf_filtered ("child %s, status %u ",
4405 target_pid_to_str (sip
-> si_pid
),
4408 else if ((sip
-> si_signo
== SIGPOLL
))
4410 printf_filtered ("band %u ", sip
-> si_band
);
4416 printf_filtered ("\n\n");
4417 printf_filtered ("\t%-16s %s.\n", signalname (sip
-> si_signo
),
4418 safe_strsignal (sip
-> si_signo
));
4419 if (sip
-> si_errno
> 0)
4421 printf_filtered ("\t%-16s %s.\n",
4422 errnoname (sip
-> si_errno
),
4423 safe_strerror (sip
-> si_errno
));
4425 if (sip
-> si_code
<= 0)
4427 printf_filtered ("\t%-16u %s\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4428 "PID of process sending signal");
4429 printf_filtered ("\t%-16u %s\n", sip
-> si_uid
,
4430 "UID of process sending signal");
4434 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
4436 if ((sip
-> si_signo
== SIGILL
) ||
4437 (sip
-> si_signo
== SIGFPE
))
4439 printf_filtered ("\t%#-16lx %s.\n",
4440 (unsigned long) sip
-> si_addr
,
4441 "Address of faulting instruction");
4443 else if ((sip
-> si_signo
== SIGSEGV
) ||
4444 (sip
-> si_signo
== SIGBUS
))
4446 printf_filtered ("\t%#-16lx %s.\n",
4447 (unsigned long) sip
-> si_addr
,
4448 "Address of faulting memory reference");
4450 else if ((sip
-> si_signo
== SIGCHLD
))
4452 printf_filtered ("\t%-16u %s.\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4453 "Child process ID");
4454 printf_filtered ("\t%-16u %s.\n", sip
-> si_status
,
4455 "Child process exit value or signal");
4457 else if ((sip
-> si_signo
== SIGPOLL
))
4459 printf_filtered ("\t%-16u %s.\n", sip
-> si_band
,
4460 "Band event for POLL_{IN,OUT,MSG}");
4464 printf_filtered ("\n");
4469 info_proc_syscalls (pip
, summary
)
4470 struct procinfo
*pip
;
4478 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4479 if (pip
-> prstatus
.pr_flags
& PR_ASLEEP
)
4481 int syscallnum
= pip
-> prstatus
.pr_reg
[R_D0
];
4484 printf_filtered ("%-32s", "Sleeping in system call:");
4485 printf_filtered ("%s", syscallname (syscallnum
));
4489 printf_filtered ("Sleeping in system call '%s'.\n",
4490 syscallname (syscallnum
));
4496 if (ioctl (pip
-> ctl_fd
, PIOCGENTRY
, &pip
-> entryset
) < 0)
4498 print_sys_errmsg (pip
-> pathname
, errno
);
4499 error ("PIOCGENTRY failed");
4502 if (ioctl (pip
-> ctl_fd
, PIOCGEXIT
, &pip
-> exitset
) < 0)
4504 print_sys_errmsg (pip
-> pathname
, errno
);
4505 error ("PIOCGEXIT failed");
4509 printf_filtered ("System call tracing information:\n\n");
4511 printf_filtered ("\t%-12s %-8s %-8s\n",
4515 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
4518 if (syscall_table
[syscallnum
] != NULL
)
4519 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
4521 printf_filtered ("\t%-12d ", syscallnum
);
4524 printf_filtered ("%-8s ",
4525 prismember (&pip
->prstatus
.pr_sysentry
, syscallnum
)
4527 printf_filtered ("%-8s ",
4528 prismember (&pip
->prstatus
.pr_sysexit
, syscallnum
)
4531 printf_filtered ("%-8s ",
4532 prismember (&pip
-> entryset
, syscallnum
)
4534 printf_filtered ("%-8s ",
4535 prismember (&pip
-> exitset
, syscallnum
)
4538 printf_filtered ("\n");
4540 printf_filtered ("\n");
4549 static char locbuf
[32];
4551 name
= strsigno (signo
);
4554 sprintf (locbuf
, "Signal %d", signo
);
4558 sprintf (locbuf
, "%s (%d)", name
, signo
);
4568 static char locbuf
[32];
4570 name
= strerrno (errnum
);
4573 sprintf (locbuf
, "Errno %d", errnum
);
4577 sprintf (locbuf
, "%s (%d)", name
, errnum
);
4583 info_proc_signals (pip
, summary
)
4584 struct procinfo
*pip
;
4591 #ifndef PROCFS_USE_READ_WRITE
4592 if (ioctl (pip
-> ctl_fd
, PIOCGTRACE
, &pip
-> trace
) < 0)
4594 print_sys_errmsg (pip
-> pathname
, errno
);
4595 error ("PIOCGTRACE failed");
4599 printf_filtered ("Disposition of signals:\n\n");
4600 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4601 "Signal", "Trace", "Hold", "Pending", "Description");
4602 for (signo
= 0; signo
< NSIG
; signo
++)
4605 printf_filtered ("\t%-15s ", signalname (signo
));
4607 printf_filtered ("%-8s ",
4608 prismember (&pip
-> prstatus
.pr_sigtrace
, signo
)
4610 printf_filtered ("%-8s ",
4611 prismember (&pip
-> prstatus
.pr_lwp
.pr_context
.uc_sigmask
, signo
)
4614 printf_filtered ("%-8s ",
4615 prismember (&pip
-> trace
, signo
)
4617 printf_filtered ("%-8s ",
4618 prismember (&pip
-> prstatus
.pr_sighold
, signo
)
4623 if (prismember (&pip
->prstatus
.pr_sigpend
, signo
) ||
4624 prismember (&pip
->prstatus
.pr_lwp
.pr_lwppend
, signo
))
4625 printf_filtered("%-8s ", "yes");
4627 printf_filtered("%-8s ", "no");
4628 #else /* UNIXWARE */
4629 #ifdef PROCFS_SIGPEND_OFFSET
4630 /* Alpha OSF/1 numbers the pending signals from 1. */
4631 printf_filtered ("%-8s ",
4632 (signo
? prismember (&pip
-> prstatus
.pr_sigpend
,
4637 printf_filtered ("%-8s ",
4638 prismember (&pip
-> prstatus
.pr_sigpend
, signo
)
4641 #endif /* UNIXWARE */
4642 printf_filtered (" %s\n", safe_strsignal (signo
));
4644 printf_filtered ("\n");
4649 info_proc_faults (pip
, summary
)
4650 struct procinfo
*pip
;
4653 struct trans
*transp
;
4658 if (ioctl (pip
-> ctl_fd
, PIOCGFAULT
, &pip
->fltset
.fltset
) < 0)
4660 print_sys_errmsg (pip
-> pathname
, errno
);
4661 error ("PIOCGFAULT failed");
4665 printf_filtered ("Current traced hardware fault set:\n\n");
4666 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4668 for (transp
= faults_table
; transp
-> name
!= NULL
; transp
++)
4671 printf_filtered ("\t%-12s ", transp
-> name
);
4673 printf_filtered ("%-8s", prismember (&pip
->prstatus
.pr_flttrace
, transp
-> value
)
4676 printf_filtered ("%-8s", prismember (&pip
->fltset
.fltset
, transp
-> value
)
4679 printf_filtered ("\n");
4681 printf_filtered ("\n");
4686 info_proc_mappings (pip
, summary
)
4687 struct procinfo
*pip
;
4691 struct prmap
*prmaps
;
4692 struct prmap
*prmap
;
4697 printf_filtered ("Mapped address spaces:\n\n");
4698 #ifdef BFD_HOST_64_BIT
4699 printf_filtered (" %18s %18s %10s %10s %7s\n",
4701 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4708 #ifdef PROCFS_USE_READ_WRITE
4709 if (fstat (pip
->map_fd
, &sbuf
) == 0)
4711 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
4712 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4713 if ((lseek (pip
->map_fd
, 0, SEEK_SET
) == 0) &&
4714 (read (pip
->map_fd
, (char *) prmaps
,
4715 nmap
* sizeof (*prmaps
)) == (nmap
* sizeof (*prmaps
))))
4718 for (prmap
= prmaps
; i
< nmap
; ++prmap
, ++i
)
4720 if (ioctl (pip
-> ctl_fd
, PIOCNMAP
, &nmap
) == 0)
4722 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4723 if (ioctl (pip
-> ctl_fd
, PIOCMAP
, prmaps
) == 0)
4725 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
4726 #endif /* PROCFS_USE_READ_WRITE */
4728 #ifdef BFD_HOST_64_BIT
4729 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4731 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4733 (unsigned long)prmap
-> pr_vaddr
,
4734 (unsigned long)prmap
-> pr_vaddr
4735 + prmap
-> pr_size
- 1,
4738 mappingflags (prmap
-> pr_mflags
));
4742 printf_filtered ("\n");
4750 info_proc -- implement the "info proc" command
4754 void info_proc (char *args, int from_tty)
4758 Implement gdb's "info proc" command by using the /proc interface
4759 to print status information about any currently running process.
4761 Examples of the use of "info proc" are:
4763 info proc (prints summary info for current inferior)
4764 info proc 123 (prints summary info for process with pid 123)
4765 info proc mappings (prints address mappings)
4766 info proc times (prints process/children times)
4767 info proc id (prints pid, ppid, gid, sid, etc)
4768 FIXME: i proc id not implemented.
4769 info proc status (prints general process state info)
4770 FIXME: i proc status not implemented.
4771 info proc signals (prints info about signal handling)
4772 info proc all (prints all info)
4777 info_proc (args
, from_tty
)
4782 struct procinfo
*pip
;
4783 struct cleanup
*old_chain
;
4799 old_chain
= make_cleanup (null_cleanup
, 0);
4801 /* Default to using the current inferior if no pid specified. Note
4802 that inferior_pid may be 0, hence we set okerr. */
4804 pid
= inferior_pid
& 0x7fffffff; /* strip off sol-thread bit */
4805 if (!(pip
= find_procinfo (pid
, 1))) /* inferior_pid no good? */
4806 pip
= procinfo_list
; /* take first available */
4807 pid
= pid
& 0xffff; /* extract "real" pid */
4811 if ((argv
= buildargv (args
)) == NULL
)
4815 make_cleanup (freeargv
, (char *) argv
);
4817 while (*argv
!= NULL
)
4819 argsize
= strlen (*argv
);
4820 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
4825 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
4830 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
4835 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
4840 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
4845 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
4850 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
4855 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
4860 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
4865 else if ((pid
= atoi (*argv
)) > 0)
4867 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4868 memset (pip
, 0, sizeof (*pip
));
4871 if (!open_proc_file (pid
, pip
, O_RDONLY
, 0))
4873 perror_with_name (pip
-> pathname
);
4877 make_cleanup (close_proc_file
, pip
);
4879 else if (**argv
!= '\000')
4881 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
4887 /* If we don't have a valid open process at this point, then we have no
4888 inferior or didn't specify a specific pid. */
4893 No process. Start debugging a program or specify an explicit process ID.");
4896 if (!procfs_read_status (pip
))
4898 print_sys_errmsg (pip
-> pathname
, errno
);
4899 error ("procfs_read_status failed");
4902 #ifndef PROCFS_USE_READ_WRITE
4904 nlwp
= pip
->prstatus
.pr_nlwp
;
4905 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (*lwps
));
4907 if (ioctl (pip
->ctl_fd
, PIOCLWPIDS
, lwps
))
4909 print_sys_errmsg (pip
-> pathname
, errno
);
4910 error ("PIOCLWPIDS failed");
4912 #else /* PIOCLWPIDS */
4914 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
4916 #endif /* PIOCLWPIDS */
4918 for (; nlwp
> 0; nlwp
--, lwps
++)
4920 pip
= find_procinfo ((*lwps
<< 16) | pid
, 1);
4924 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4925 memset (pip
, 0, sizeof (*pip
));
4926 if (!open_proc_file ((*lwps
<< 16) | pid
, pip
, O_RDONLY
, 0))
4929 make_cleanup (close_proc_file
, pip
);
4931 if (!procfs_read_status (pip
))
4933 print_sys_errmsg (pip
-> pathname
, errno
);
4934 error ("procfs_read_status failed");
4938 #endif /* PROCFS_USE_READ_WRITE */
4940 /* Print verbose information of the requested type(s), or just a summary
4941 of the information for all types. */
4943 printf_filtered ("\nInformation for %s.%d:\n\n", pip
-> pathname
, *lwps
);
4944 if (summary
|| all
|| flags
)
4946 info_proc_flags (pip
, summary
);
4950 info_proc_stop (pip
, summary
);
4952 supply_gregset (&pip
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
4954 supply_gregset (&pip
->prstatus
.pr_reg
);
4956 printf_filtered ("PC: ");
4957 print_address (read_pc (), gdb_stdout
);
4958 printf_filtered ("\n");
4960 if (summary
|| all
|| signals
|| faults
)
4962 info_proc_siginfo (pip
, summary
);
4964 if (summary
|| all
|| syscalls
)
4966 info_proc_syscalls (pip
, summary
);
4968 if (summary
|| all
|| mappings
)
4970 info_proc_mappings (pip
, summary
);
4972 if (summary
|| all
|| signals
)
4974 info_proc_signals (pip
, summary
);
4976 if (summary
|| all
|| faults
)
4978 info_proc_faults (pip
, summary
);
4980 printf_filtered ("\n");
4982 /* All done, deal with closing any temporary process info structure,
4983 freeing temporary memory , etc. */
4985 do_cleanups (old_chain
);
4986 #ifndef PROCFS_USE_READ_WRITE
4995 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
4999 void modify_inherit_on_fork_flag (fd, flag)
5003 Call this routine to modify the inherit-on-fork flag. This routine is
5004 just a nice wrapper to hide the #ifdefs needed by various systems to
5010 modify_inherit_on_fork_flag (fd
, flag
)
5014 #if defined (PIOCSET) || defined (PCSET)
5018 struct proc_ctl pctl
;
5020 #if defined (PIOCSET) || defined (PCSET) /* New method */
5024 #ifdef PROCFS_USE_READ_WRITE
5026 pctl
.data
= PR_FORK
;
5027 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5030 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5035 #ifdef PROCFS_USE_READ_WRITE
5037 pctl
.data
= PR_FORK
;
5038 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5041 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5046 #ifdef PIOCSFORK /* Original method */
5049 retval
= ioctl (fd
, PIOCSFORK
, NULL
);
5053 retval
= ioctl (fd
, PIOCRFORK
, NULL
);
5056 Neither PR_FORK nor PIOCSFORK exist
!!!
5063 print_sys_errmsg ("modify_inherit_on_fork_flag", errno
);
5064 error ("PIOCSFORK or PR_FORK modification failed");
5071 modify_run_on_last_close_flag - Change the run-on-last-close flag
5075 void modify_run_on_last_close_flag (fd, flag)
5079 Call this routine to modify the run-on-last-close flag. This routine
5080 is just a nice wrapper to hide the #ifdefs needed by various systems to
5086 modify_run_on_last_close_flag (fd
, flag
)
5090 #if defined (PIOCSET) || defined (PCSET)
5094 struct proc_ctl pctl
;
5096 #if defined (PIOCSET) || defined (PCSET) /* New method */
5100 #ifdef PROCFS_USE_READ_WRITE
5103 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5106 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5111 #ifdef PROCFS_USE_READ_WRITE
5114 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5117 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5122 #ifdef PIOCSRLC /* Original method */
5124 retval
= ioctl (fd
, PIOCSRLC
, NULL
);
5126 retval
= ioctl (fd
, PIOCRRLC
, NULL
);
5128 Neither PR_RLC nor PIOCSRLC exist
!!!
5135 print_sys_errmsg ("modify_run_on_last_close_flag", errno
);
5136 error ("PIOCSRLC or PR_RLC modification failed");
5143 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5147 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5151 This function function disables traps for the specified system call.
5152 errok is non-zero if errors should be ignored.
5156 procfs_clear_syscall_trap (pi
, syscall_num
, errok
)
5157 struct procinfo
*pi
;
5165 goterr
= ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0;
5167 if (goterr
&& !errok
)
5169 print_sys_errmsg (pi
->pathname
, errno
);
5170 error ("PIOCGENTRY failed");
5175 prdelset (&sysset
, syscall_num
);
5177 if ((ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0) && !errok
)
5179 print_sys_errmsg (pi
->pathname
, errno
);
5180 error ("PIOCSENTRY failed");
5184 goterr
= ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0;
5186 if (goterr
&& !errok
)
5188 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5189 print_sys_errmsg (pi
->pathname
, errno
);
5190 error ("PIOCGEXIT failed");
5195 praddset (&sysset
, syscall_num
);
5197 if ((ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0) && !errok
)
5199 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5200 print_sys_errmsg (pi
->pathname
, errno
);
5201 error ("PIOCSEXIT failed");
5206 if (!pi
->syscall_handlers
)
5209 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5213 /* Remove handler func from the handler list */
5215 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5216 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5218 if (i
+ 1 != pi
->num_syscall_handlers
)
5219 { /* Not the last entry.
5220 Move subsequent entries fwd. */
5221 memcpy (&pi
->syscall_handlers
[i
], &pi
->syscall_handlers
[i
+ 1],
5222 (pi
->num_syscall_handlers
- i
- 1)
5223 * sizeof (struct procfs_syscall_handler
));
5226 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
,
5227 (pi
->num_syscall_handlers
- 1)
5228 * sizeof (struct procfs_syscall_handler
));
5229 pi
->num_syscall_handlers
--;
5234 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5242 procfs_set_syscall_trap -- arrange for a function to be called when the
5243 child executes the specified system call.
5247 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5248 syscall_func_t *function)
5252 This function sets up an entry and/or exit trap for the specified system
5253 call. When the child executes the specified system call, your function
5254 will be called with the call #, a flag that indicates entry or exit, and
5255 pointers to rtnval and statval (which are used by procfs_wait). The
5256 function should return non-zero if something interesting happened, zero
5261 procfs_set_syscall_trap (pi
, syscall_num
, flags
, func
)
5262 struct procinfo
*pi
;
5265 syscall_func_t
*func
;
5270 if (flags
& PROCFS_SYSCALL_ENTRY
)
5272 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0)
5274 print_sys_errmsg (pi
->pathname
, errno
);
5275 error ("PIOCGENTRY failed");
5278 praddset (&sysset
, syscall_num
);
5280 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0)
5282 print_sys_errmsg (pi
->pathname
, errno
);
5283 error ("PIOCSENTRY failed");
5287 if (flags
& PROCFS_SYSCALL_EXIT
)
5289 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0)
5291 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5292 print_sys_errmsg (pi
->pathname
, errno
);
5293 error ("PIOCGEXIT failed");
5296 praddset (&sysset
, syscall_num
);
5298 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0)
5300 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5301 print_sys_errmsg (pi
->pathname
, errno
);
5302 error ("PIOCSEXIT failed");
5307 if (!pi
->syscall_handlers
)
5309 pi
->syscall_handlers
= xmalloc (sizeof (struct procfs_syscall_handler
));
5310 pi
->syscall_handlers
[0].syscall_num
= syscall_num
;
5311 pi
->syscall_handlers
[0].func
= func
;
5312 pi
->num_syscall_handlers
= 1;
5318 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5319 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5321 pi
->syscall_handlers
[i
].func
= func
;
5325 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
, (i
+ 1)
5326 * sizeof (struct procfs_syscall_handler
));
5327 pi
->syscall_handlers
[i
].syscall_num
= syscall_num
;
5328 pi
->syscall_handlers
[i
].func
= func
;
5329 pi
->num_syscall_handlers
++;
5333 #ifdef SYS_lwp_create
5339 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5343 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5347 This routine is called both when an inferior process and it's new lwp
5348 are about to finish a _lwp_create() system call. This is the system
5349 call that Solaris uses to create a lightweight process. When the
5350 target process gets this event, we can look at sysarg[2] to find the
5351 new childs lwp ID, and create a procinfo struct from that. After that,
5352 we pretend that we got a SIGTRAP, and return non-zero to tell
5353 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5354 sees the new process and continues it.
5356 When we see the child exiting from lwp_create, we just contine it,
5357 since everything was handled when the parent trapped.
5360 In effect, we are only paying attention to the parent's completion of
5361 the lwp_create syscall. If we only paid attention to the child
5362 instead, then we wouldn't detect the creation of a suspended thread.
5366 procfs_lwp_creation_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
5367 struct procinfo
*pi
;
5374 struct procinfo
*childpi
;
5375 struct proc_ctl pctl
;
5377 /* We've just detected the completion of an lwp_create system call. Now we
5378 need to setup a procinfo struct for this thread, and notify the thread
5379 system of the new arrival. */
5381 /* If lwp_create failed, then nothing interesting happened. Continue the
5382 process and go back to sleep. */
5385 /* Joel ... can you check this logic out please? JKJ */
5386 if (pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
[R_EFL
] & 1)
5387 { /* _lwp_create failed */
5389 pctl
.data
= PRCFAULT
;
5391 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5392 perror_with_name (pi
->pathname
);
5396 #else /* UNIXWARE */
5397 if (PROCFS_GET_CARRY (pi
->prstatus
.pr_reg
))
5398 { /* _lwp_create failed */
5399 pi
->prrun
.pr_flags
&= PRSTEP
;
5400 pi
->prrun
.pr_flags
|= PRCFAULT
;
5402 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5403 perror_with_name (pi
->pathname
);
5409 /* At this point, the new thread is stopped at it's first instruction, and
5410 the parent is stopped at the exit from lwp_create. */
5412 if (pi
->new_child
) /* Child? */
5413 { /* Yes, just continue it */
5416 pctl
.data
= PRCFAULT
;
5418 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5419 #else /* !UNIXWARE */
5420 pi
->prrun
.pr_flags
&= PRSTEP
;
5421 pi
->prrun
.pr_flags
|= PRCFAULT
;
5423 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
5424 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5425 #endif /* !UNIXWARE */
5426 perror_with_name (pi
->pathname
);
5428 pi
->new_child
= 0; /* No longer new */
5433 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5434 in the child and continue the parent. */
5436 /* Third arg is pointer to new thread id. */
5438 lwp_id
= read_memory_integer (pi
->prstatus
.pr_lwp
.pr_sysarg
[2], sizeof (int));
5440 lwp_id
= read_memory_integer (pi
->prstatus
.pr_sysarg
[2], sizeof (int));
5443 lwp_id
= (lwp_id
<< 16) | PIDGET (pi
->pid
);
5445 childpi
= create_procinfo (lwp_id
);
5447 /* The new process has actually inherited the lwp_create syscall trap from
5448 it's parent, but we still have to call this to register handlers for
5451 procfs_set_inferior_syscall_traps (childpi
);
5452 add_thread (lwp_id
);
5453 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id
));
5455 /* Continue the parent */
5458 pctl
.data
= PRCFAULT
;
5460 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5462 pi
->prrun
.pr_flags
&= PRSTEP
;
5463 pi
->prrun
.pr_flags
|= PRCFAULT
;
5464 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5466 perror_with_name (pi
->pathname
);
5468 /* The new child may have been created in one of two states:
5469 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5470 If suspended, we flag it to be continued later, when it has an event. */
5473 if (childpi
->prstatus
.pr_lwp
.pr_why
== PR_SUSPENDED
)
5475 if (childpi
->prstatus
.pr_why
== PR_SUSPENDED
)
5477 childpi
->new_child
= 1; /* Flag this as an unseen child process */
5480 /* Continue the child */
5483 pctl
.data
= PRCFAULT
;
5485 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5487 childpi
->prrun
.pr_flags
&= PRSTEP
;
5488 childpi
->prrun
.pr_flags
|= PRCFAULT
;
5490 if (ioctl (childpi
->ctl_fd
, PIOCRUN
, &childpi
->prrun
) != 0)
5492 perror_with_name (childpi
->pathname
);
5496 #endif /* SYS_lwp_create */
5498 /* Fork an inferior process, and start debugging it with /proc. */
5501 procfs_create_inferior (exec_file
, allargs
, env
)
5506 char *shell_file
= getenv ("SHELL");
5508 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
5511 /* We will be looking down the PATH to find shell_file. If we
5512 just do this the normal way (via execlp, which operates by
5513 attempting an exec for each element of the PATH until it
5514 finds one which succeeds), then there will be an exec for
5515 each failed attempt, each of which will cause a PR_SYSEXIT
5516 stop, and we won't know how to distinguish the PR_SYSEXIT's
5517 for these failed execs with the ones for successful execs
5518 (whether the exec has succeeded is stored at that time in the
5519 carry bit or some such architecture-specific and
5520 non-ABI-specified place).
5522 So I can't think of anything better than to search the PATH
5523 now. This has several disadvantages: (1) There is a race
5524 condition; if we find a file now and it is deleted before we
5525 exec it, we lose, even if the deletion leaves a valid file
5526 further down in the PATH, (2) there is no way to know exactly
5527 what an executable (in the sense of "capable of being
5528 exec'd") file is. Using access() loses because it may lose
5529 if the caller is the superuser; failing to use it loses if
5530 there are ACLs or some such. */
5534 /* FIXME-maybe: might want "set path" command so user can change what
5535 path is used from within GDB. */
5536 char *path
= getenv ("PATH");
5538 struct stat statbuf
;
5541 path
= "/bin:/usr/bin";
5543 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
5544 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1: NULL
)
5546 p1
= strchr (p
, ':');
5551 strncpy (tryname
, p
, len
);
5552 tryname
[len
] = '\0';
5553 strcat (tryname
, "/");
5554 strcat (tryname
, shell_file
);
5555 if (access (tryname
, X_OK
) < 0)
5557 if (stat (tryname
, &statbuf
) < 0)
5559 if (!S_ISREG (statbuf
.st_mode
))
5560 /* We certainly need to reject directories. I'm not quite
5561 as sure about FIFOs, sockets, etc., but I kind of doubt
5562 that people want to exec() these things. */
5567 /* Not found. This must be an error rather than merely passing
5568 the file to execlp(), because execlp() would try all the
5569 exec()s, causing GDB to get confused. */
5570 error ("Can't find shell %s in PATH", shell_file
);
5572 shell_file
= tryname
;
5575 fork_inferior (exec_file
, allargs
, env
,
5576 proc_set_exec_trap
, procfs_init_inferior
, NULL
, shell_file
);
5578 /* We are at the first instruction we care about. */
5579 /* Pedal to the metal... */
5581 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
5584 /* Clean up after the inferior dies. */
5587 procfs_mourn_inferior ()
5589 struct procinfo
*pi
;
5590 struct procinfo
*next_pi
;
5592 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5595 unconditionally_kill_inferior (pi
);
5598 unpush_target (&procfs_ops
);
5599 generic_mourn_inferior ();
5603 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5607 /* This variable is controlled by modules that sit atop procfs that may layer
5608 their own process structure atop that provided here. sol-thread.c does
5609 this because of the Solaris two-level thread model. */
5611 return !procfs_suppress_run
;
5613 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5616 /* Insert a watchpoint */
5618 procfs_set_watchpoint(pid
, addr
, len
, rw
)
5624 struct procinfo
*pi
;
5627 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5628 wpt
.pr_vaddr
= (caddr_t
)addr
;
5630 wpt
.pr_wflags
= ((rw
& 1) ? MA_READ
: 0) | ((rw
& 2) ? MA_WRITE
: 0);
5631 if (ioctl (pi
->ctl_fd
, PIOCSWATCH
, &wpt
) < 0)
5635 /* Currently it sometimes happens that the same watchpoint gets
5636 deleted twice - don't die in this case (FIXME please) */
5637 if (errno
== ESRCH
&& len
== 0)
5639 print_sys_errmsg (pi
->pathname
, errno
);
5640 error ("PIOCSWATCH failed");
5646 procfs_stopped_by_watchpoint(pid
)
5649 struct procinfo
*pi
;
5653 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5654 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
5656 why
= pi
->prstatus
.pr_why
;
5657 what
= pi
->prstatus
.pr_what
;
5658 if (why
== PR_FAULTED
5659 #if defined (FLTWATCH) && defined (FLTKWATCH)
5660 && (what
== FLTWATCH
|| what
== FLTKWATCH
)
5663 && (what
== FLTWATCH
)
5666 && (what
== FLTKWATCH
)
5674 #endif /* !UNIXWARE */
5675 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5677 /* Why is this necessary? Shouldn't dead threads just be removed from the
5681 procfs_thread_alive (pid
)
5684 struct procinfo
*pi
, *next_pi
;
5686 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5689 if (pi
-> pid
== pid
)
5690 if (procfs_read_status (pi
)) /* alive */
5692 else /* defunct (exited) */
5694 close_proc_file (pi
);
5702 procfs_first_available ()
5704 struct procinfo
*pi
;
5706 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
5708 if (procfs_read_status (pi
))
5715 procfs_get_pid_fd (pid
)
5718 struct procinfo
*pi
= find_procinfo (pid
, 1);
5726 /* Send a SIGINT to the process group. This acts just like the user typed a
5727 ^C on the controlling terminal.
5729 XXX - This may not be correct for all systems. Some may want to use
5730 killpg() instead of kill (-pgrp). */
5735 extern pid_t inferior_process_group
;
5737 kill (-inferior_process_group
, SIGINT
);
5740 /* Convert a pid to printable form. */
5744 procfs_pid_to_str (pid
)
5747 static char buf
[100];
5749 sprintf (buf
, "Kernel thread %d", TIDGET (pid
));
5755 struct target_ops procfs_ops
= {
5756 "procfs", /* to_shortname */
5757 "Unix /proc child process", /* to_longname */
5758 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
5759 procfs_open
, /* to_open */
5761 procfs_attach
, /* to_attach */
5762 NULL
, /* to_post_attach */
5763 procfs_attach
, /* to_require_attach */
5764 procfs_detach
, /* to_detach */
5765 procfs_detach
, /* to_require_detach */
5766 procfs_resume
, /* to_resume */
5767 procfs_wait
, /* to_wait */
5768 NULL
, /* to_post_wait */
5769 procfs_fetch_registers
, /* to_fetch_registers */
5770 procfs_store_registers
, /* to_store_registers */
5771 procfs_prepare_to_store
, /* to_prepare_to_store */
5772 procfs_xfer_memory
, /* to_xfer_memory */
5773 procfs_files_info
, /* to_files_info */
5774 memory_insert_breakpoint
, /* to_insert_breakpoint */
5775 memory_remove_breakpoint
, /* to_remove_breakpoint */
5776 terminal_init_inferior
, /* to_terminal_init */
5777 terminal_inferior
, /* to_terminal_inferior */
5778 terminal_ours_for_output
, /* to_terminal_ours_for_output */
5779 terminal_ours
, /* to_terminal_ours */
5780 child_terminal_info
, /* to_terminal_info */
5781 procfs_kill_inferior
, /* to_kill */
5783 0, /* to_lookup_symbol */
5784 procfs_create_inferior
, /* to_create_inferior */
5785 NULL
, /* to_post_startup_inferior */
5786 NULL
, /* to_acknowledge_created_inferior */
5787 NULL
, /* to_clone_and_follow_inferior */
5788 NULL
, /* to_post_follow_inferior_by_clone */
5789 NULL
, /* to_insert_fork_catchpoint */
5790 NULL
, /* to_remove_fork_catchpoint */
5791 NULL
, /* to_insert_vfork_catchpoint */
5792 NULL
, /* to_remove_vfork_catchpoint */
5793 NULL
, /* to_has_forked */
5794 NULL
, /* to_has_vforked */
5795 NULL
, /* to_can_follow_vfork_prior_to_exec */
5796 NULL
, /* to_post_follow_vfork */
5797 NULL
, /* to_insert_exec_catchpoint */
5798 NULL
, /* to_remove_exec_catchpoint */
5799 NULL
, /* to_has_execd */
5800 NULL
, /* to_reported_exec_events_per_exec_call */
5801 NULL
, /* to_has_syscall_event */
5802 NULL
, /* to_has_exited */
5803 procfs_mourn_inferior
, /* to_mourn_inferior */
5804 procfs_can_run
, /* to_can_run */
5805 procfs_notice_signals
, /* to_notice_signals */
5806 procfs_thread_alive
, /* to_thread_alive */
5807 procfs_stop
, /* to_stop */
5808 NULL
, /* to_enable_exception_callback */
5809 NULL
, /* to_get_current_exception_event */
5810 NULL
, /* to_pid_to_exec_file */
5811 NULL
, /* to_core_file_to_sym_file */
5812 process_stratum
, /* to_stratum */
5814 1, /* to_has_all_memory */
5815 1, /* to_has_memory */
5816 1, /* to_has_stack */
5817 1, /* to_has_registers */
5818 1, /* to_has_execution */
5819 tc_none
, /* to_has_thread_control */
5821 0, /* sections_end */
5822 OPS_MAGIC
/* to_magic */
5826 _initialize_procfs ()
5828 #ifdef HAVE_OPTIONAL_PROC_FS
5829 char procname
[MAX_PROC_NAME_SIZE
];
5832 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5833 don't add procfs support if we cannot access the running
5835 sprintf (procname
, STATUS_PROC_NAME_FMT
, getpid ());
5836 if ((fd
= open (procname
, O_RDONLY
)) < 0)
5841 add_target (&procfs_ops
);
5843 add_info ("processes", info_proc
,
5844 "Show process status information using /proc entry.\n\
5845 Specify process id or use current inferior by default.\n\
5846 Specify keywords for detailed information; default is summary.\n\
5847 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5848 `status', `syscalls', and `times'.\n\
5849 Unambiguous abbreviations may be used.");
5851 init_syscall_table ();