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 int 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 int 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);
2573 procfs_notice_signals
2577 static void procfs_notice_signals (int pid);
2581 When the user changes the state of gdb's signal handling via the
2582 "handle" command, this function gets called to see if any change
2583 in the /proc interface is required. It is also called internally
2584 by other /proc interface functions to initialize the state of
2585 the traced signal set.
2587 One thing it does is that signals for which the state is "nostop",
2588 "noprint", and "pass", have their trace bits reset in the pr_trace
2589 field, so that they are no longer traced. This allows them to be
2590 delivered directly to the inferior without the debugger ever being
2595 procfs_notice_signals (pid
)
2598 struct procinfo
*pi
;
2599 struct sig_ctl sctl
;
2601 pi
= find_procinfo (pid
, 0);
2604 premptyset (&sctl
.sigset
);
2606 sctl
.sigset
= pi
->prrun
.pr_trace
;
2609 notice_signals (pi
, &sctl
);
2612 pi
->prrun
.pr_trace
= sctl
.sigset
;
2617 notice_signals (pi
, sctl
)
2618 struct procinfo
*pi
;
2619 struct sig_ctl
*sctl
;
2623 for (signo
= 0; signo
< NSIG
; signo
++)
2625 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
2626 signal_print_state (target_signal_from_host (signo
)) == 0 &&
2627 signal_pass_state (target_signal_from_host (signo
)) == 1)
2629 prdelset (&sctl
->sigset
, signo
);
2633 praddset (&sctl
->sigset
, signo
);
2636 #ifdef PROCFS_USE_READ_WRITE
2637 sctl
->cmd
= PCSTRACE
;
2638 if (write (pi
->ctl_fd
, (char *) sctl
, sizeof (struct sig_ctl
)) < 0)
2640 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &sctl
->sigset
))
2643 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2651 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2655 void proc_set_exec_trap (void)
2659 This function is called in the child process when starting up
2660 an inferior, prior to doing the exec of the actual inferior.
2661 It sets the child process's exitset to make exit from the exec
2662 system call an event of interest to stop on, and then simply
2663 returns. The child does the exec, the system call returns, and
2664 the child stops at the first instruction, ready for the gdb
2665 parent process to take control of it.
2669 We need to use all local variables since the child may be sharing
2670 it's data space with the parent, if vfork was used rather than
2673 Also note that we want to turn off the inherit-on-fork flag in
2674 the child process so that any grand-children start with all
2675 tracing flags cleared.
2679 proc_set_exec_trap ()
2681 struct sys_ctl exitset
;
2682 struct sys_ctl entryset
;
2683 char procname
[MAX_PROC_NAME_SIZE
];
2686 sprintf (procname
, CTL_PROC_NAME_FMT
, getpid ());
2688 if ((fd
= open (procname
, O_WRONLY
)) < 0)
2690 if ((fd
= open (procname
, O_RDWR
)) < 0)
2694 gdb_flush (gdb_stderr
);
2697 premptyset (&exitset
.sysset
);
2698 premptyset (&entryset
.sysset
);
2700 #ifdef PRFS_STOPEXEC
2701 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2702 exits from exec system calls because of the user level loader. */
2706 if (ioctl (fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
2709 gdb_flush (gdb_stderr
);
2712 prfs_flags
|= PRFS_STOPEXEC
;
2713 if (ioctl (fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
2716 gdb_flush (gdb_stderr
);
2720 #else /* PRFS_STOPEXEC */
2722 Not all systems with /proc have all the exec* syscalls with the same
2723 names. On the SGI, for example, there is no SYS_exec, but there
2724 *is* a SYS_execv. So, we try to account for that. */
2727 praddset (&exitset
.sysset
, SYS_exec
);
2730 praddset (&exitset
.sysset
, SYS_execve
);
2733 praddset (&exitset
.sysset
, SYS_execv
);
2736 #ifdef PROCFS_USE_READ_WRITE
2737 exitset
.cmd
= PCSEXIT
;
2738 if (write (fd
, (char *) &exitset
, sizeof (struct sys_ctl
)) < 0)
2740 if (ioctl (fd
, PIOCSEXIT
, &exitset
.sysset
) < 0)
2744 gdb_flush (gdb_stderr
);
2747 #endif /* PRFS_STOPEXEC */
2749 praddset (&entryset
.sysset
, SYS_exit
);
2751 #ifdef PROCFS_USE_READ_WRITE
2752 entryset
.cmd
= PCSENTRY
;
2753 if (write (fd
, (char *) &entryset
, sizeof (struct sys_ctl
)) < 0)
2755 if (ioctl (fd
, PIOCSENTRY
, &entryset
.sysset
) < 0)
2759 gdb_flush (gdb_stderr
);
2763 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2764 start with tracing flags cleared. */
2766 modify_inherit_on_fork_flag (fd
, 0);
2768 /* Turn on run-on-last-close flag so that this process will not hang
2769 if GDB goes away for some reason. */
2771 modify_run_on_last_close_flag (fd
, 1);
2773 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2774 /* NOTE: revisit when doing thread support for UW */
2778 struct proc_ctl pctl
;
2780 /* Solaris needs this to make procfs treat all threads seperately. Without
2781 this, all threads halt whenever something happens to any thread. Since
2782 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2784 pr_flags
= PR_ASYNC
;
2785 #ifdef PROCFS_USE_READ_WRITE
2787 pctl
.data
= PR_FORK
|PR_ASYNC
;
2788 write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
));
2790 ioctl (fd
, PIOCSET
, &pr_flags
);
2793 #endif /* PR_ASYNC */
2794 #endif /* !UNIXWARE */
2801 proc_iterate_over_mappings -- call function for every mapped space
2805 int proc_iterate_over_mappings (int (*func)())
2809 Given a pointer to a function, call that function for every
2810 mapped address space, passing it an open file descriptor for
2811 the file corresponding to that mapped address space (if any)
2812 and the base address of the mapped space. Quit when we hit
2813 the end of the mappings or the function returns nonzero.
2818 proc_iterate_over_mappings (func
)
2819 int (*func
) PARAMS ((int, CORE_ADDR
));
2826 struct procinfo
*pi
;
2829 pi
= current_procinfo
;
2831 if (fstat (pi
->map_fd
, &sbuf
) < 0)
2834 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
2835 prmaps
= (prmap_t
*) alloca (nmap
* sizeof(prmap_t
));
2836 if ((lseek (pi
->map_fd
, 0, SEEK_SET
) == 0) &&
2837 (read (pi
->map_fd
, (char *) prmaps
, nmap
* sizeof (prmap_t
)) ==
2838 (nmap
* sizeof (prmap_t
))))
2841 for (prmap
= prmaps
; i
< nmap
&& funcstat
== 0; ++prmap
, ++i
)
2843 char name
[sizeof ("/proc/1234567890/object") +
2844 sizeof (prmap
->pr_mapname
)];
2845 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, prmap
->pr_mapname
);
2846 if ((fd
= open (name
, O_RDONLY
)) == -1)
2851 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
->pr_vaddr
);
2857 #else /* UNIXWARE */
2859 proc_iterate_over_mappings (func
)
2860 int (*func
) PARAMS ((int, CORE_ADDR
));
2865 struct prmap
*prmaps
;
2866 struct prmap
*prmap
;
2867 struct procinfo
*pi
;
2869 pi
= current_procinfo
;
2871 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2873 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2874 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2876 for (prmap
= prmaps
; prmap
-> pr_size
&& funcstat
== 0; ++prmap
)
2878 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
-> pr_vaddr
, 0);
2879 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
-> pr_vaddr
);
2886 #endif /* UNIXWARE */
2888 #if 0 /* Currently unused */
2893 proc_base_address -- find base address for segment containing address
2897 CORE_ADDR proc_base_address (CORE_ADDR addr)
2901 Given an address of a location in the inferior, find and return
2902 the base address of the mapped segment containing that address.
2904 This is used for example, by the shared library support code,
2905 where we have the pc value for some location in the shared library
2906 where we are stopped, and need to know the base address of the
2907 segment containing that address.
2911 proc_base_address (addr
)
2915 struct prmap
*prmaps
;
2916 struct prmap
*prmap
;
2917 CORE_ADDR baseaddr
= 0;
2918 struct procinfo
*pi
;
2920 pi
= current_procinfo
;
2922 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2924 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2925 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2927 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
2929 if ((prmap
-> pr_vaddr
<= (caddr_t
) addr
) &&
2930 (prmap
-> pr_vaddr
+ prmap
-> pr_size
> (caddr_t
) addr
))
2932 baseaddr
= (CORE_ADDR
) prmap
-> pr_vaddr
;
2948 proc_address_to_fd -- return open fd for file mapped to address
2952 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2956 Given an address in the current inferior's address space, use the
2957 /proc interface to find an open file descriptor for the file that
2958 this address was mapped in from. Return -1 if there is no current
2959 inferior. Print a warning message if there is an inferior but
2960 the address corresponds to no file (IE a bogus address).
2965 proc_address_to_fd (pi
, addr
, complain
)
2966 struct procinfo
*pi
;
2972 if ((fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, (caddr_t
*) &addr
)) < 0)
2976 print_sys_errmsg (pi
->pathname
, errno
);
2977 warning ("can't find mapped file for address 0x%x", addr
);
2982 #endif /* !UNIXWARE */
2984 /* Attach to process PID, then initialize for debugging it
2985 and wait for the trace-trap that results from attaching. */
2988 procfs_attach (args
, from_tty
)
2996 error_no_arg ("process-id to attach");
3000 if (pid
== getpid()) /* Trying to masturbate? */
3001 error ("I refuse to debug myself!");
3005 exec_file
= (char *) get_exec_file (0);
3008 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
3010 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid
));
3012 gdb_flush (gdb_stdout
);
3015 inferior_pid
= pid
= do_attach (pid
);
3016 push_target (&procfs_ops
);
3020 /* Take a program previously attached to and detaches it.
3021 The program resumes execution and will no longer stop
3022 on signals, etc. We'd better not have left any breakpoints
3023 in the program or it'll die when it hits one. For this
3024 to work, it may be necessary for the process to have been
3025 previously attached. It *might* work if the program was
3026 started via the normal ptrace (PTRACE_TRACEME). */
3029 procfs_detach (args
, from_tty
)
3037 char *exec_file
= get_exec_file (0);
3040 printf_unfiltered ("Detaching from program: %s %s\n",
3041 exec_file
, target_pid_to_str (inferior_pid
));
3042 gdb_flush (gdb_stdout
);
3045 siggnal
= atoi (args
);
3047 do_detach (siggnal
);
3049 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
3052 /* Get ready to modify the registers array. On machines which store
3053 individual registers, this doesn't need to do anything. On machines
3054 which store all the registers in one fell swoop, this makes sure
3055 that registers contains all the registers from the program being
3059 procfs_prepare_to_store ()
3061 #ifdef CHILD_PREPARE_TO_STORE
3062 CHILD_PREPARE_TO_STORE ();
3066 /* Print status information about what we're accessing. */
3069 procfs_files_info (ignore
)
3070 struct target_ops
*ignore
;
3072 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3073 attach_flag
? "attached": "child", target_pid_to_str (inferior_pid
));
3078 procfs_open (arg
, from_tty
)
3082 error ("Use the \"run\" command to start a Unix child process.");
3089 do_attach -- attach to an already existing process
3093 int do_attach (int pid)
3097 Attach to an already existing process with the specified process
3098 id. If the process is not already stopped, query whether to
3103 The option of stopping at attach time is specific to the /proc
3104 versions of gdb. Versions using ptrace force the attachee
3105 to stop. (I have changed this version to do so, too. All you
3106 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3114 struct procinfo
*pi
;
3115 struct sig_ctl sctl
;
3116 struct flt_ctl fctl
;
3119 pi
= init_procinfo (pid
, 0);
3122 nlwp
= pi
->prstatus
.pr_nlwp
;
3123 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (id_t
));
3125 if (ioctl (pi
->ctl_fd
, PIOCLWPIDS
, lwps
))
3127 print_sys_errmsg (pi
-> pathname
, errno
);
3128 error ("PIOCLWPIDS failed");
3130 #else /* PIOCLWPIDS */
3132 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
3135 for (; nlwp
> 0; nlwp
--, lwps
++)
3137 /* First one has already been created above. */
3138 if ((pi
= find_procinfo ((*lwps
<< 16) | pid
, 1)) == 0)
3139 pi
= init_procinfo ((*lwps
<< 16) | pid
, 0);
3142 if (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3144 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3147 pi
->was_stopped
= 1;
3151 pi
->was_stopped
= 0;
3152 if (1 || query ("Process is currently running, stop it? "))
3155 /* Make it run again when we close it. */
3156 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3157 #ifdef PROCFS_USE_READ_WRITE
3159 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3161 if (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
3164 print_sys_errmsg (pi
->pathname
, errno
);
3165 close_proc_file (pi
);
3166 error ("PIOCSTOP failed");
3169 if (!procfs_read_status (pi
))
3171 print_sys_errmsg (pi
->pathname
, errno
);
3172 close_proc_file (pi
);
3173 error ("procfs_read_status failed");
3176 pi
->nopass_next_sigstop
= 1;
3180 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3181 target_pid_to_str (pi
->pid
));
3185 #ifdef PROCFS_USE_READ_WRITE
3186 fctl
.cmd
= PCSFAULT
;
3187 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
3188 print_sys_errmsg ("PCSFAULT failed", errno
);
3189 #else /* PROCFS_USE_READ_WRITE */
3190 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
3192 print_sys_errmsg ("PIOCSFAULT failed", errno
);
3194 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
3196 print_sys_errmsg ("PIOCSTRACE failed", errno
);
3198 add_thread (pi
->pid
);
3199 procfs_set_inferior_syscall_traps (pi
);
3200 #endif /* PROCFS_USE_READ_WRITE */
3210 do_detach -- detach from an attached-to process
3214 void do_detach (int signal)
3218 Detach from the current attachee.
3220 If signal is non-zero, the attachee is started running again and sent
3221 the specified signal.
3223 If signal is zero and the attachee was not already stopped when we
3224 attached to it, then we make it runnable again when we detach.
3226 Otherwise, we query whether or not to make the attachee runnable
3227 again, since we may simply want to leave it in the state it was in
3230 We report any problems, but do not consider them errors, since we
3231 MUST detach even if some things don't seem to go right. This may not
3232 be the ideal situation. (FIXME).
3239 struct procinfo
*pi
;
3241 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3245 set_proc_siginfo (pi
, signal
);
3247 #ifdef PROCFS_USE_READ_WRITE
3248 pi
->saved_exitset
.cmd
= PCSEXIT
;
3249 if (write (pi
->ctl_fd
, (char *) &pi
->saved_exitset
,
3250 sizeof (struct sys_ctl
)) < 0)
3252 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &pi
->saved_exitset
.sysset
) < 0)
3255 print_sys_errmsg (pi
->pathname
, errno
);
3256 printf_unfiltered ("PIOCSEXIT failed.\n");
3258 #ifdef PROCFS_USE_READ_WRITE
3259 pi
->saved_entryset
.cmd
= PCSENTRY
;
3260 if (write (pi
->ctl_fd
, (char *) &pi
->saved_entryset
,
3261 sizeof (struct sys_ctl
)) < 0)
3263 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &pi
->saved_entryset
.sysset
) < 0)
3266 print_sys_errmsg (pi
->pathname
, errno
);
3267 printf_unfiltered ("PIOCSENTRY failed.\n");
3269 #ifdef PROCFS_USE_READ_WRITE
3270 pi
->saved_trace
.cmd
= PCSTRACE
;
3271 if (write (pi
->ctl_fd
, (char *) &pi
->saved_trace
,
3272 sizeof (struct sig_ctl
)) < 0)
3274 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->saved_trace
.sigset
) < 0)
3277 print_sys_errmsg (pi
->pathname
, errno
);
3278 printf_unfiltered ("PIOCSTRACE failed.\n");
3281 if (ioctl (pi
->ctl_fd
, PIOCSHOLD
, &pi
->saved_sighold
.sigset
) < 0)
3283 print_sys_errmsg (pi
->pathname
, errno
);
3284 printf_unfiltered ("PIOSCHOLD failed.\n");
3287 #ifdef PROCFS_USE_READ_WRITE
3288 pi
->saved_fltset
.cmd
= PCSFAULT
;
3289 if (write (pi
->ctl_fd
, (char *) &pi
->saved_fltset
,
3290 sizeof (struct flt_ctl
)) < 0)
3292 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->saved_fltset
.fltset
) < 0)
3295 print_sys_errmsg (pi
->pathname
, errno
);
3296 printf_unfiltered ("PIOCSFAULT failed.\n");
3298 if (!procfs_read_status (pi
))
3300 print_sys_errmsg (pi
->pathname
, errno
);
3301 printf_unfiltered ("procfs_read_status failed.\n");
3306 if (signal
|| (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3308 if (signal
|| (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3312 struct proc_ctl pctl
;
3314 if (signal
|| !pi
->was_stopped
||
3315 query ("Was stopped when attached, make it runnable again? "))
3317 /* Clear any pending signal if we want to detach without
3320 set_proc_siginfo (pi
, signal
);
3322 /* Clear any fault that might have stopped it. */
3323 #ifdef PROCFS_USE_READ_WRITE
3325 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3327 if (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0))
3330 print_sys_errmsg (pi
->pathname
, errno
);
3331 printf_unfiltered ("PIOCCFAULT failed.\n");
3334 /* Make it run again when we close it. */
3336 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3340 close_proc_file (pi
);
3345 /* emulate wait() as much as possible.
3346 Wait for child to do something. Return pid of child, or -1 in case
3347 of error; store status in *OURSTATUS.
3349 Not sure why we can't
3350 just use wait(), but it seems to have problems when applied to a
3351 process being controlled with the /proc interface.
3353 We have a race problem here with no obvious solution. We need to let
3354 the inferior run until it stops on an event of interest, which means
3355 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3356 ioctl if the process is already stopped on something that is not an
3357 event of interest, or the call will hang indefinitely. Thus we first
3358 use PIOCSTATUS to see if the process is not stopped. If not, then we
3359 use PIOCWSTOP. But during the window between the two, if the process
3360 stops for any reason that is not an event of interest (such as a job
3361 control signal) then gdb will hang. One possible workaround is to set
3362 an alarm to wake up every minute of so and check to see if the process
3363 is still running, and if so, then reissue the PIOCWSTOP. But this is
3364 a real kludge, so has not been implemented. FIXME: investigate
3367 FIXME: Investigate why wait() seems to have problems with programs
3368 being control by /proc routines. */
3370 procfs_wait (pid
, ourstatus
)
3372 struct target_waitstatus
*ourstatus
;
3379 struct procinfo
*pi
;
3380 struct proc_ctl pctl
;
3384 /* handle all syscall events first, otherwise we might not
3385 notice a thread was created until too late. */
3387 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3393 if (! (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)) )
3396 why
= pi
->prstatus
.pr_lwp
.pr_why
;
3397 what
= pi
->prstatus
.pr_lwp
.pr_what
;
3399 if (! (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)) )
3402 why
= pi
->prstatus
.pr_why
;
3403 what
= pi
->prstatus
.pr_what
;
3405 if (why
== PR_SYSENTRY
|| why
== PR_SYSEXIT
)
3408 int found_handler
= 0;
3410 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
3411 if (pi
->syscall_handlers
[i
].syscall_num
== what
)
3414 pi
->saved_rtnval
= pi
->pid
;
3415 pi
->saved_statval
= 0;
3416 if (!pi
->syscall_handlers
[i
].func
3417 (pi
, what
, why
, &pi
->saved_rtnval
, &pi
->saved_statval
))
3424 if (why
== PR_SYSENTRY
)
3425 error ("PR_SYSENTRY, unhandled system call %d", what
);
3427 error ("PR_SYSEXIT, unhandled system call %d", what
);
3432 /* find a relevant process with an event */
3434 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3435 if (pi
->had_event
&& (pid
== -1 || pi
->pid
== pid
))
3445 if (!checkerr
&& !(pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3447 if (!checkerr
&& !(pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3450 if (!procfs_write_pcwstop (pi
))
3457 if (errno
== ENOENT
)
3459 /* XXX Fixme -- what to do if attached? Can't call wait... */
3460 rtnval
= wait (&statval
);
3461 if ((rtnval
) != (PIDGET (inferior_pid
)))
3463 print_sys_errmsg (pi
->pathname
, errno
);
3464 error ("procfs_wait: wait failed, returned %d", rtnval
);
3470 print_sys_errmsg (pi
->pathname
, errno
);
3471 error ("PIOCSTATUS or PIOCWSTOP failed.");
3476 else if (pi
->prstatus
.pr_lwp
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3478 else if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3482 rtnval
= pi
->prstatus
.pr_pid
;
3483 why
= pi
->prstatus
.pr_lwp
.pr_why
;
3484 what
= pi
->prstatus
.pr_lwp
.pr_what
;
3487 why
= pi
->prstatus
.pr_why
;
3488 what
= pi
->prstatus
.pr_what
;
3494 statval
= (what
<< 8) | 0177;
3498 rtnval
= pi
->saved_rtnval
;
3499 statval
= pi
->saved_statval
;
3502 statval
= (SIGSTOP
<< 8) | 0177;
3505 statval
= (what
<< 8) | 0177;
3512 statval
= (SIGTRAP
<< 8) | 0177;
3517 statval
= (SIGTRAP
<< 8) | 0177;
3520 #ifndef FAULTED_USE_SIGINFO
3521 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3522 Solaris fills in si_signo. I'm not sure about others. */
3525 statval
= (SIGILL
<< 8) | 0177;
3529 statval
= (SIGTRAP
<< 8) | 0177;
3534 statval
= (SIGSEGV
<< 8) | 0177;
3539 statval
= (SIGFPE
<< 8) | 0177;
3541 case FLTPAGE
: /* Recoverable page fault */
3542 #endif /* not FAULTED_USE_SIGINFO */
3544 /* Use the signal which the kernel assigns. This is better than
3545 trying to second-guess it from the fault. In fact, I suspect
3546 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3548 statval
= ((pi
->prstatus
.pr_lwp
.pr_info
.si_signo
) << 8) | 0177;
3550 statval
= ((pi
->prstatus
.pr_info
.si_signo
) << 8) | 0177;
3556 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
3558 /* Stop all the other threads when any of them stops. */
3561 struct procinfo
*procinfo
, *next_pi
;
3563 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3565 next_pi
= procinfo
->next
;
3566 if (!procinfo
->had_event
)
3568 #ifdef PROCFS_USE_READ_WRITE
3570 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3572 print_sys_errmsg (procinfo
->pathname
, errno
);
3573 error ("PCSTOP failed");
3576 /* A bug in Solaris (2.5) causes us to hang when trying to
3577 stop a stopped process. So, we have to check first in
3578 order to avoid the hang. */
3579 if (!procfs_read_status (procinfo
))
3581 /* The LWP has apparently terminated. */
3583 printf_filtered ("LWP %d doesn't respond.\n",
3584 (procinfo
->pid
>> 16) & 0xffff);
3585 close_proc_file (procinfo
);
3589 if (!(procinfo
->prstatus
.pr_flags
& PR_STOPPED
))
3590 if (ioctl (procinfo
->ctl_fd
, PIOCSTOP
, &procinfo
->prstatus
)
3593 print_sys_errmsg (procinfo
->pathname
, errno
);
3594 warning ("PIOCSTOP failed");
3603 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3605 pi
->prstatus
.pr_lwp
.pr_flags
);
3607 pi
->prstatus
.pr_flags
);
3611 store_waitstatus (ourstatus
, statval
);
3613 if (rtnval
== -1) /* No more children to wait for */
3615 warning ("Child process unexpectedly missing");
3616 /* Claim it exited with unknown signal. */
3617 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3618 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
3622 pi
->had_event
= 0; /* Indicate that we've seen this one */
3630 set_proc_siginfo - set a process's current signal info
3634 void set_proc_siginfo (struct procinfo *pip, int signo);
3638 Given a pointer to a process info struct in PIP and a signal number
3639 in SIGNO, set the process's current signal and its associated signal
3640 information. The signal will be delivered to the process immediately
3641 after execution is resumed, even if it is being held. In addition,
3642 this particular delivery will not cause another PR_SIGNALLED stop
3643 even if the signal is being traced.
3645 If we are not delivering the same signal that the prstatus siginfo
3646 struct contains information about, then synthesize a siginfo struct
3647 to match the signal we are doing to deliver, make it of the type
3648 "generated by a user process", and send this synthesized copy. When
3649 used to set the inferior's signal state, this will be required if we
3650 are not currently stopped because of a traced signal, or if we decide
3651 to continue with a different signal.
3653 Note that when continuing the inferior from a stop due to receipt
3654 of a traced signal, we either have set PRCSIG to clear the existing
3655 signal, or we have to call this function to do a PIOCSSIG with either
3656 the existing siginfo struct from pr_info, or one we have synthesized
3657 appropriately for the signal we want to deliver. Otherwise if the
3658 signal is still being traced, the inferior will immediately stop
3661 See siginfo(5) for more details.
3665 set_proc_siginfo (pip
, signo
)
3666 struct procinfo
*pip
;
3669 struct siginfo newsiginfo
;
3670 struct siginfo
*sip
;
3671 struct sigi_ctl sictl
;
3673 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3674 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3675 receives a PIOCSSIG with a signal identical to the current signal,
3676 it messes up the current signal. Work around the kernel bug. */
3678 if (signo
== pip
-> prstatus
.pr_lwp
.pr_cursig
)
3680 if (signo
== pip
-> prstatus
.pr_cursig
)
3686 if (signo
== pip
->prstatus
.pr_lwp
.pr_info
.si_signo
)
3688 memcpy ((char *) &sictl
.siginfo
, (char *) &pip
->prstatus
.pr_lwp
.pr_info
,
3689 sizeof (siginfo_t
));
3692 if (signo
== pip
-> prstatus
.pr_info
.si_signo
)
3694 sip
= &pip
-> prstatus
.pr_info
;
3700 siginfo_t
*sip
= &sictl
.siginfo
;
3701 memset ((char *) sip
, 0, sizeof (siginfo_t
));
3703 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
3706 sip
-> si_signo
= signo
;
3708 sip
-> si_errno
= 0;
3709 sip
-> si_pid
= getpid ();
3710 sip
-> si_uid
= getuid ();
3712 #ifdef PROCFS_USE_READ_WRITE
3714 if (write (pip
->ctl_fd
, (char *) &sictl
, sizeof (struct sigi_ctl
)) < 0)
3716 if (ioctl (pip
->ctl_fd
, PIOCSSIG
, sip
) < 0)
3719 print_sys_errmsg (pip
-> pathname
, errno
);
3720 warning ("PIOCSSIG failed");
3724 /* Resume execution of process PID. If STEP is nozero, then
3725 just single step it. If SIGNAL is nonzero, restart it with that
3726 signal activated. */
3729 procfs_resume (pid
, step
, signo
)
3732 enum target_signal signo
;
3735 struct procinfo
*pi
, *procinfo
, *next_pi
;
3736 struct proc_ctl pctl
;
3738 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
3743 pctl
.data
= PRCFAULT
;
3745 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
3749 /* It should not be necessary. If the user explicitly changes the value,
3750 value_assign calls write_register_bytes, which writes it. */
3751 /* It may not be absolutely necessary to specify the PC value for
3752 restarting, but to be safe we use the value that gdb considers
3753 to be current. One case where this might be necessary is if the
3754 user explicitly changes the PC value that gdb considers to be
3755 current. FIXME: Investigate if this is necessary or not. */
3757 #ifdef PRSVADDR_BROKEN
3758 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3759 place to put nPC. In fact, if you use this, nPC seems to be set to some
3760 random garbage. We have to rely on the fact that PC and nPC have been
3761 written previously via PIOCSREG during a register flush. */
3763 pi
->prrun
.pr_vaddr
= (caddr_t
) *(int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
3764 pi
->prrun
.pr_flags
!= PRSVADDR
;
3768 if (signo
== TARGET_SIGNAL_STOP
&& pi
->nopass_next_sigstop
)
3769 /* When attaching to a child process, if we forced it to stop with
3770 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3771 Upon resuming the first time after such a stop, we explicitly
3772 inhibit sending it another SIGSTOP, which would be the normal
3773 result of default signal handling. One potential drawback to
3774 this is that we will also ignore any attempt to by the user
3775 to explicitly continue after the attach with a SIGSTOP. Ultimately
3776 this problem should be dealt with by making the routines that
3777 deal with the inferior a little smarter, and possibly even allow
3778 an inferior to continue running at the same time as gdb. (FIXME?) */
3780 else if (signo
== TARGET_SIGNAL_TSTP
3782 && pi
->prstatus
.pr_lwp
.pr_cursig
== SIGTSTP
3783 && pi
->prstatus
.pr_lwp
.pr_action
.sa_handler
== SIG_DFL
3785 && pi
->prstatus
.pr_cursig
== SIGTSTP
3786 && pi
->prstatus
.pr_action
.sa_handler
== SIG_DFL
3790 /* We are about to pass the inferior a SIGTSTP whose action is
3791 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3792 (notifying the parent via wait()), and then keep going from the
3793 same place when the parent is ready for you to keep going. So
3794 under the debugger, it should do nothing (as if the program had
3795 been stopped and then later resumed. Under ptrace, this
3796 happens for us, but under /proc, the system obligingly stops
3797 the process, and wait_for_inferior would have no way of
3798 distinguishing that type of stop (which indicates that we
3799 should just start it again), with a stop due to the pr_trace
3800 field of the prrun_t struct.
3802 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3803 because the handler needs to get executed. */
3806 signal_to_pass
= target_signal_to_host (signo
);
3810 set_proc_siginfo (pi
, signal_to_pass
);
3815 pctl
.data
|= PRCSIG
;
3817 pi
->prrun
.pr_flags
|= PRCSIG
;
3820 pi
->nopass_next_sigstop
= 0;
3824 pctl
.data
|= PRSTEP
;
3826 pi
->prrun
.pr_flags
|= PRSTEP
;
3830 /* Don't try to start a process unless it's stopped on an
3831 `event of interest'. Doing so will cause errors. */
3833 if (!procfs_read_status (pi
))
3835 /* The LWP has apparently terminated. */
3837 printf_filtered ("LWP %d doesn't respond.\n",
3838 (pi
->pid
>> 16) & 0xffff);
3839 close_proc_file (pi
);
3843 #ifdef PROCFS_USE_READ_WRITE
3844 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
3846 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
3847 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
3850 /* The LWP has apparently terminated. */
3852 printf_filtered ("LWP %d doesn't respond.\n",
3853 (pi
->pid
>> 16) & 0xffff);
3854 close_proc_file (pi
);
3858 /* Continue all the other threads that haven't had an event of interest.
3859 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3860 set by do_attach, and means this is the first resume after an attach.
3861 All threads were CSTOP'd by do_attach, and should be resumed now. */
3864 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3866 next_pi
= procinfo
->next
;
3868 if (!procinfo
->had_event
||
3869 (procinfo
->nopass_next_sigstop
&& signo
== TARGET_SIGNAL_STOP
))
3871 procinfo
->had_event
= procinfo
->nopass_next_sigstop
= 0;
3872 #ifdef PROCFS_USE_READ_WRITE
3873 pctl
.data
= PRCFAULT
| PRCSIG
;
3874 if (write (procinfo
->ctl_fd
, (char *) &pctl
,
3875 sizeof (struct proc_ctl
)) < 0)
3877 if (!procfs_read_status (procinfo
))
3878 fprintf_unfiltered(gdb_stderr
,
3879 "procfs_read_status failed, errno=%d\n",
3881 print_sys_errmsg (procinfo
->pathname
, errno
);
3882 error ("PCRUN failed");
3885 procinfo
->prrun
.pr_flags
&= PRSTEP
;
3886 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
3887 if (!procfs_read_status (procinfo
))
3889 /* The LWP has apparently terminated. */
3891 printf_filtered ("LWP %d doesn't respond.\n",
3892 (procinfo
->pid
>> 16) & 0xffff);
3893 close_proc_file (procinfo
);
3897 /* Don't try to start a process unless it's stopped on an
3898 `event of interest'. Doing so will cause errors. */
3900 if ((procinfo
->prstatus
.pr_flags
& PR_ISTOP
)
3901 && ioctl (procinfo
->ctl_fd
, PIOCRUN
, &procinfo
->prrun
) < 0)
3903 if (!procfs_read_status (procinfo
))
3904 fprintf_unfiltered(gdb_stderr
,
3905 "procfs_read_status failed, errno=%d\n",
3907 print_sys_errmsg (procinfo
->pathname
, errno
);
3908 warning ("PIOCRUN failed");
3912 procfs_read_status (procinfo
);
3920 procfs_fetch_registers -- fetch current registers from inferior
3924 void procfs_fetch_registers (int regno)
3928 Read the current values of the inferior's registers, both the
3929 general register set and floating point registers (if supported)
3930 and update gdb's idea of their current values.
3935 procfs_fetch_registers (regno
)
3938 struct procinfo
*pi
;
3940 pi
= current_procinfo
;
3943 if (procfs_read_status (pi
))
3945 supply_gregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
3946 #if defined (FP0_REGNUM)
3947 supply_fpregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
);
3950 #else /* UNIXWARE */
3951 if (ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
) != -1)
3953 supply_gregset (&pi
->gregset
.gregset
);
3955 #if defined (FP0_REGNUM)
3956 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
) != -1)
3958 supply_fpregset (&pi
->fpregset
.fpregset
);
3961 #endif /* UNIXWARE */
3968 proc_init_failed - called when /proc access initialization fails
3973 static void proc_init_failed (struct procinfo *pi,
3974 char *why, int kill_p)
3978 This function is called whenever initialization of access to a /proc
3979 entry fails. It prints a suitable error message, does some cleanup,
3980 and then invokes the standard error processing routine which dumps
3981 us back into the command loop. If KILL_P is true, sends SIGKILL.
3985 proc_init_failed (pi
, why
, kill_p
)
3986 struct procinfo
*pi
;
3990 print_sys_errmsg (pi
->pathname
, errno
);
3992 kill (pi
->pid
, SIGKILL
);
3993 close_proc_file (pi
);
4002 close_proc_file - close any currently open /proc entry
4006 static void close_proc_file (struct procinfo *pip)
4010 Close any currently open /proc entry and mark the process information
4011 entry as invalid. In order to ensure that we don't try to reuse any
4012 stale information, the pid, fd, and pathnames are explicitly
4013 invalidated, which may be overkill.
4018 close_proc_file (pip
)
4019 struct procinfo
*pip
;
4021 struct procinfo
*procinfo
;
4023 delete_thread (pip
->pid
); /* remove thread from GDB's thread list */
4024 remove_fd (pip
); /* Remove fd from poll/select list */
4026 close (pip
->ctl_fd
);
4027 #ifdef HAVE_MULTIPLE_PROC_FDS
4029 close (pip
->status_fd
);
4030 close (pip
->map_fd
);
4033 free (pip
-> pathname
);
4035 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4037 if (procinfo_list
== pip
)
4038 procinfo_list
= pip
->next
;
4041 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
4043 if (procinfo
->next
== pip
)
4045 procinfo
->next
= pip
->next
;
4057 open_proc_file - open a /proc entry for a given process id
4061 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4065 Given a process id and a mode, close the existing open /proc
4066 entry (if any) and open one for the new process id, in the
4067 specified mode. Once it is open, then mark the local process
4068 information structure as valid, which guarantees that the pid,
4069 fd, and pathname fields match an open /proc entry. Returns
4070 zero if the open fails, nonzero otherwise.
4072 Note that the pathname is left intact, even when the open fails,
4073 so that callers can use it to construct meaningful error messages
4074 rather than just "file open failed".
4076 Note that for Solaris, the process-id also includes an LWP-id, so we
4077 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4078 then we will ask the kernel what it is and add it to the pid. Hence,
4079 the pid can be changed by us.
4083 open_proc_file (pid
, pip
, mode
, control
)
4085 struct procinfo
*pip
;
4092 pip
-> had_event
= 0;
4093 pip
-> pathname
= xmalloc (MAX_PROC_NAME_SIZE
);
4102 #ifdef HAVE_MULTIPLE_PROC_FDS
4103 sprintf (pip
->pathname
, STATUS_PROC_NAME_FMT
, tmp
);
4104 if ((pip
->status_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4109 sprintf (pip
->pathname
, AS_PROC_NAME_FMT
, tmp
);
4110 if ((pip
->as_fd
= open (pip
->pathname
, O_RDWR
)) < 0)
4112 close (pip
->status_fd
);
4116 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4117 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4119 close (pip
->status_fd
);
4124 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4125 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4127 close (pip
->status_fd
);
4134 sprintf (pip
->pathname
, CTL_PROC_NAME_FMT
, tmp
);
4135 if ((pip
->ctl_fd
= open (pip
->pathname
, O_WRONLY
)) < 0)
4137 close (pip
->status_fd
);
4139 close (pip
->map_fd
);
4144 #else /* HAVE_MULTIPLE_PROC_FDS */
4145 sprintf (pip
-> pathname
, CTL_PROC_NAME_FMT
, tmp
);
4147 if ((tmpfd
= open (pip
-> pathname
, mode
)) < 0)
4151 pip
-> ctl_fd
= tmpfd
;
4152 pip
-> as_fd
= tmpfd
;
4153 pip
-> map_fd
= tmpfd
;
4154 pip
-> status_fd
= tmpfd
;
4156 tmp
= (pid
>> 16) & 0xffff; /* Extract thread id */
4159 { /* Don't know thread id yet */
4160 if (ioctl (tmpfd
, PIOCSTATUS
, &pip
-> prstatus
) < 0)
4162 print_sys_errmsg (pip
-> pathname
, errno
);
4164 error ("open_proc_file: PIOCSTATUS failed");
4167 tmp
= pip
-> prstatus
.pr_who
; /* Get thread id from prstatus_t */
4168 pip
-> pid
= (tmp
<< 16) | pid
; /* Update pip */
4171 if ((pip
-> ctl_fd
= ioctl (tmpfd
, PIOCOPENLWP
, &tmp
)) < 0)
4177 #ifdef PIOCSET /* New method */
4180 pr_flags
= PR_ASYNC
;
4181 ioctl (pip
-> ctl_fd
, PIOCSET
, &pr_flags
);
4185 /* keep extra fds in sync */
4186 pip
->as_fd
= pip
->ctl_fd
;
4187 pip
->map_fd
= pip
->ctl_fd
;
4188 pip
->status_fd
= pip
->ctl_fd
;
4190 close (tmpfd
); /* All done with main pid */
4191 #endif /* PIOCOPENLWP */
4193 #endif /* HAVE_MULTIPLE_PROC_FDS */
4199 mappingflags (flags
)
4202 static char asciiflags
[8];
4204 strcpy (asciiflags
, "-------");
4205 #if defined (MA_PHYS)
4206 if (flags
& MA_PHYS
) asciiflags
[0] = 'd';
4208 if (flags
& MA_STACK
) asciiflags
[1] = 's';
4209 if (flags
& MA_BREAK
) asciiflags
[2] = 'b';
4210 if (flags
& MA_SHARED
) asciiflags
[3] = 's';
4211 if (flags
& MA_READ
) asciiflags
[4] = 'r';
4212 if (flags
& MA_WRITE
) asciiflags
[5] = 'w';
4213 if (flags
& MA_EXEC
) asciiflags
[6] = 'x';
4214 return (asciiflags
);
4218 info_proc_flags (pip
, summary
)
4219 struct procinfo
*pip
;
4222 struct trans
*transp
;
4224 long flags
= pip
->prstatus
.pr_flags
| pip
->prstatus
.pr_lwp
.pr_flags
;
4226 long flags
= pip
->prstatus
.pr_flags
;
4229 printf_filtered ("%-32s", "Process status flags:");
4232 printf_filtered ("\n\n");
4234 for (transp
= pr_flag_table
; transp
-> name
!= NULL
; transp
++)
4236 if (flags
& transp
-> value
)
4240 printf_filtered ("%s ", transp
-> name
);
4244 printf_filtered ("\t%-16s %s.\n", transp
-> name
, transp
-> desc
);
4248 printf_filtered ("\n");
4252 info_proc_stop (pip
, summary
)
4253 struct procinfo
*pip
;
4256 struct trans
*transp
;
4261 why
= pip
-> prstatus
.pr_lwp
.pr_why
;
4262 what
= pip
-> prstatus
.pr_lwp
.pr_what
;
4264 why
= pip
-> prstatus
.pr_why
;
4265 what
= pip
-> prstatus
.pr_what
;
4269 if (pip
-> prstatus
.pr_lwp
.pr_flags
& PR_STOPPED
)
4271 if (pip
-> prstatus
.pr_flags
& PR_STOPPED
)
4274 printf_filtered ("%-32s", "Reason for stopping:");
4277 printf_filtered ("\n\n");
4279 for (transp
= pr_why_table
; transp
-> name
!= NULL
; transp
++)
4281 if (why
== transp
-> value
)
4285 printf_filtered ("%s ", transp
-> name
);
4289 printf_filtered ("\t%-16s %s.\n",
4290 transp
-> name
, transp
-> desc
);
4296 /* Use the pr_why field to determine what the pr_what field means, and
4297 print more information. */
4302 /* pr_what is unused for this case */
4308 printf_filtered ("%s ", signalname (what
));
4312 printf_filtered ("\t%-16s %s.\n", signalname (what
),
4313 safe_strsignal (what
));
4319 printf_filtered ("%s ", syscallname (what
));
4323 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4324 "Entered this system call");
4330 printf_filtered ("%s ", syscallname (what
));
4334 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4335 "Returned from this system call");
4341 printf_filtered ("%s ",
4342 lookupname (faults_table
, what
, "fault"));
4346 printf_filtered ("\t%-16s %s.\n",
4347 lookupname (faults_table
, what
, "fault"),
4348 lookupdesc (faults_table
, what
));
4352 printf_filtered ("\n");
4357 info_proc_siginfo (pip
, summary
)
4358 struct procinfo
*pip
;
4361 struct siginfo
*sip
;
4364 if ((pip
-> prstatus
.pr_lwp
.pr_flags
& PR_STOPPED
) &&
4365 (pip
-> prstatus
.pr_lwp
.pr_why
== PR_SIGNALLED
||
4366 pip
-> prstatus
.pr_lwp
.pr_why
== PR_FAULTED
))
4368 if ((pip
-> prstatus
.pr_flags
& PR_STOPPED
) &&
4369 (pip
-> prstatus
.pr_why
== PR_SIGNALLED
||
4370 pip
-> prstatus
.pr_why
== PR_FAULTED
))
4373 printf_filtered ("%-32s", "Additional signal/fault info:");
4375 sip
= &pip
-> prstatus
.pr_lwp
.pr_info
;
4377 sip
= &pip
-> prstatus
.pr_info
;
4381 printf_filtered ("%s ", signalname (sip
-> si_signo
));
4382 if (sip
-> si_errno
> 0)
4384 printf_filtered ("%s ", errnoname (sip
-> si_errno
));
4386 if (sip
-> si_code
<= 0)
4388 printf_filtered ("sent by %s, uid %d ",
4389 target_pid_to_str (sip
-> si_pid
),
4394 printf_filtered ("%s ", sigcodename (sip
));
4395 if ((sip
-> si_signo
== SIGILL
) ||
4396 (sip
-> si_signo
== SIGFPE
) ||
4397 (sip
-> si_signo
== SIGSEGV
) ||
4398 (sip
-> si_signo
== SIGBUS
))
4400 printf_filtered ("addr=%#lx ",
4401 (unsigned long) sip
-> si_addr
);
4403 else if ((sip
-> si_signo
== SIGCHLD
))
4405 printf_filtered ("child %s, status %u ",
4406 target_pid_to_str (sip
-> si_pid
),
4409 else if ((sip
-> si_signo
== SIGPOLL
))
4411 printf_filtered ("band %u ", sip
-> si_band
);
4417 printf_filtered ("\n\n");
4418 printf_filtered ("\t%-16s %s.\n", signalname (sip
-> si_signo
),
4419 safe_strsignal (sip
-> si_signo
));
4420 if (sip
-> si_errno
> 0)
4422 printf_filtered ("\t%-16s %s.\n",
4423 errnoname (sip
-> si_errno
),
4424 safe_strerror (sip
-> si_errno
));
4426 if (sip
-> si_code
<= 0)
4428 printf_filtered ("\t%-16u %s\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4429 "PID of process sending signal");
4430 printf_filtered ("\t%-16u %s\n", sip
-> si_uid
,
4431 "UID of process sending signal");
4435 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
4437 if ((sip
-> si_signo
== SIGILL
) ||
4438 (sip
-> si_signo
== SIGFPE
))
4440 printf_filtered ("\t%#-16lx %s.\n",
4441 (unsigned long) sip
-> si_addr
,
4442 "Address of faulting instruction");
4444 else if ((sip
-> si_signo
== SIGSEGV
) ||
4445 (sip
-> si_signo
== SIGBUS
))
4447 printf_filtered ("\t%#-16lx %s.\n",
4448 (unsigned long) sip
-> si_addr
,
4449 "Address of faulting memory reference");
4451 else if ((sip
-> si_signo
== SIGCHLD
))
4453 printf_filtered ("\t%-16u %s.\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4454 "Child process ID");
4455 printf_filtered ("\t%-16u %s.\n", sip
-> si_status
,
4456 "Child process exit value or signal");
4458 else if ((sip
-> si_signo
== SIGPOLL
))
4460 printf_filtered ("\t%-16u %s.\n", sip
-> si_band
,
4461 "Band event for POLL_{IN,OUT,MSG}");
4465 printf_filtered ("\n");
4470 info_proc_syscalls (pip
, summary
)
4471 struct procinfo
*pip
;
4479 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4480 if (pip
-> prstatus
.pr_flags
& PR_ASLEEP
)
4482 int syscallnum
= pip
-> prstatus
.pr_reg
[R_D0
];
4485 printf_filtered ("%-32s", "Sleeping in system call:");
4486 printf_filtered ("%s", syscallname (syscallnum
));
4490 printf_filtered ("Sleeping in system call '%s'.\n",
4491 syscallname (syscallnum
));
4497 if (ioctl (pip
-> ctl_fd
, PIOCGENTRY
, &pip
-> entryset
) < 0)
4499 print_sys_errmsg (pip
-> pathname
, errno
);
4500 error ("PIOCGENTRY failed");
4503 if (ioctl (pip
-> ctl_fd
, PIOCGEXIT
, &pip
-> exitset
) < 0)
4505 print_sys_errmsg (pip
-> pathname
, errno
);
4506 error ("PIOCGEXIT failed");
4510 printf_filtered ("System call tracing information:\n\n");
4512 printf_filtered ("\t%-12s %-8s %-8s\n",
4516 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
4519 if (syscall_table
[syscallnum
] != NULL
)
4520 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
4522 printf_filtered ("\t%-12d ", syscallnum
);
4525 printf_filtered ("%-8s ",
4526 prismember (&pip
->prstatus
.pr_sysentry
, syscallnum
)
4528 printf_filtered ("%-8s ",
4529 prismember (&pip
->prstatus
.pr_sysexit
, syscallnum
)
4532 printf_filtered ("%-8s ",
4533 prismember (&pip
-> entryset
, syscallnum
)
4535 printf_filtered ("%-8s ",
4536 prismember (&pip
-> exitset
, syscallnum
)
4539 printf_filtered ("\n");
4541 printf_filtered ("\n");
4550 static char locbuf
[32];
4552 name
= strsigno (signo
);
4555 sprintf (locbuf
, "Signal %d", signo
);
4559 sprintf (locbuf
, "%s (%d)", name
, signo
);
4569 static char locbuf
[32];
4571 name
= strerrno (errnum
);
4574 sprintf (locbuf
, "Errno %d", errnum
);
4578 sprintf (locbuf
, "%s (%d)", name
, errnum
);
4584 info_proc_signals (pip
, summary
)
4585 struct procinfo
*pip
;
4592 #ifndef PROCFS_USE_READ_WRITE
4593 if (ioctl (pip
-> ctl_fd
, PIOCGTRACE
, &pip
-> trace
) < 0)
4595 print_sys_errmsg (pip
-> pathname
, errno
);
4596 error ("PIOCGTRACE failed");
4600 printf_filtered ("Disposition of signals:\n\n");
4601 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4602 "Signal", "Trace", "Hold", "Pending", "Description");
4603 for (signo
= 0; signo
< NSIG
; signo
++)
4606 printf_filtered ("\t%-15s ", signalname (signo
));
4608 printf_filtered ("%-8s ",
4609 prismember (&pip
-> prstatus
.pr_sigtrace
, signo
)
4611 printf_filtered ("%-8s ",
4612 prismember (&pip
-> prstatus
.pr_lwp
.pr_context
.uc_sigmask
, signo
)
4615 printf_filtered ("%-8s ",
4616 prismember (&pip
-> trace
, signo
)
4618 printf_filtered ("%-8s ",
4619 prismember (&pip
-> prstatus
.pr_sighold
, signo
)
4624 if (prismember (&pip
->prstatus
.pr_sigpend
, signo
) ||
4625 prismember (&pip
->prstatus
.pr_lwp
.pr_lwppend
, signo
))
4626 printf_filtered("%-8s ", "yes");
4628 printf_filtered("%-8s ", "no");
4629 #else /* UNIXWARE */
4630 #ifdef PROCFS_SIGPEND_OFFSET
4631 /* Alpha OSF/1 numbers the pending signals from 1. */
4632 printf_filtered ("%-8s ",
4633 (signo
? prismember (&pip
-> prstatus
.pr_sigpend
,
4638 printf_filtered ("%-8s ",
4639 prismember (&pip
-> prstatus
.pr_sigpend
, signo
)
4642 #endif /* UNIXWARE */
4643 printf_filtered (" %s\n", safe_strsignal (signo
));
4645 printf_filtered ("\n");
4650 info_proc_faults (pip
, summary
)
4651 struct procinfo
*pip
;
4654 struct trans
*transp
;
4659 if (ioctl (pip
-> ctl_fd
, PIOCGFAULT
, &pip
->fltset
.fltset
) < 0)
4661 print_sys_errmsg (pip
-> pathname
, errno
);
4662 error ("PIOCGFAULT failed");
4666 printf_filtered ("Current traced hardware fault set:\n\n");
4667 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4669 for (transp
= faults_table
; transp
-> name
!= NULL
; transp
++)
4672 printf_filtered ("\t%-12s ", transp
-> name
);
4674 printf_filtered ("%-8s", prismember (&pip
->prstatus
.pr_flttrace
, transp
-> value
)
4677 printf_filtered ("%-8s", prismember (&pip
->fltset
.fltset
, transp
-> value
)
4680 printf_filtered ("\n");
4682 printf_filtered ("\n");
4687 info_proc_mappings (pip
, summary
)
4688 struct procinfo
*pip
;
4692 struct prmap
*prmaps
;
4693 struct prmap
*prmap
;
4698 printf_filtered ("Mapped address spaces:\n\n");
4699 #ifdef BFD_HOST_64_BIT
4700 printf_filtered (" %18s %18s %10s %10s %7s\n",
4702 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4709 #ifdef PROCFS_USE_READ_WRITE
4710 if (fstat (pip
->map_fd
, &sbuf
) == 0)
4712 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
4713 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4714 if ((lseek (pip
->map_fd
, 0, SEEK_SET
) == 0) &&
4715 (read (pip
->map_fd
, (char *) prmaps
,
4716 nmap
* sizeof (*prmaps
)) == (nmap
* sizeof (*prmaps
))))
4719 for (prmap
= prmaps
; i
< nmap
; ++prmap
, ++i
)
4721 if (ioctl (pip
-> ctl_fd
, PIOCNMAP
, &nmap
) == 0)
4723 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4724 if (ioctl (pip
-> ctl_fd
, PIOCMAP
, prmaps
) == 0)
4726 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
4727 #endif /* PROCFS_USE_READ_WRITE */
4729 #ifdef BFD_HOST_64_BIT
4730 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4732 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4734 (unsigned long)prmap
-> pr_vaddr
,
4735 (unsigned long)prmap
-> pr_vaddr
4736 + prmap
-> pr_size
- 1,
4739 mappingflags (prmap
-> pr_mflags
));
4743 printf_filtered ("\n");
4751 info_proc -- implement the "info proc" command
4755 void info_proc (char *args, int from_tty)
4759 Implement gdb's "info proc" command by using the /proc interface
4760 to print status information about any currently running process.
4762 Examples of the use of "info proc" are:
4764 info proc (prints summary info for current inferior)
4765 info proc 123 (prints summary info for process with pid 123)
4766 info proc mappings (prints address mappings)
4767 info proc times (prints process/children times)
4768 info proc id (prints pid, ppid, gid, sid, etc)
4769 FIXME: i proc id not implemented.
4770 info proc status (prints general process state info)
4771 FIXME: i proc status not implemented.
4772 info proc signals (prints info about signal handling)
4773 info proc all (prints all info)
4778 info_proc (args
, from_tty
)
4783 struct procinfo
*pip
;
4784 struct cleanup
*old_chain
;
4800 old_chain
= make_cleanup (null_cleanup
, 0);
4802 /* Default to using the current inferior if no pid specified. Note
4803 that inferior_pid may be 0, hence we set okerr. */
4805 pid
= inferior_pid
& 0x7fffffff; /* strip off sol-thread bit */
4806 if (!(pip
= find_procinfo (pid
, 1))) /* inferior_pid no good? */
4807 pip
= procinfo_list
; /* take first available */
4808 pid
= pid
& 0xffff; /* extract "real" pid */
4812 if ((argv
= buildargv (args
)) == NULL
)
4816 make_cleanup (freeargv
, (char *) argv
);
4818 while (*argv
!= NULL
)
4820 argsize
= strlen (*argv
);
4821 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
4826 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
4831 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
4836 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
4841 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
4846 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
4851 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
4856 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
4861 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
4866 else if ((pid
= atoi (*argv
)) > 0)
4868 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4869 memset (pip
, 0, sizeof (*pip
));
4872 if (!open_proc_file (pid
, pip
, O_RDONLY
, 0))
4874 perror_with_name (pip
-> pathname
);
4878 make_cleanup (close_proc_file
, pip
);
4880 else if (**argv
!= '\000')
4882 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
4888 /* If we don't have a valid open process at this point, then we have no
4889 inferior or didn't specify a specific pid. */
4894 No process. Start debugging a program or specify an explicit process ID.");
4897 if (!procfs_read_status (pip
))
4899 print_sys_errmsg (pip
-> pathname
, errno
);
4900 error ("procfs_read_status failed");
4903 #ifndef PROCFS_USE_READ_WRITE
4905 nlwp
= pip
->prstatus
.pr_nlwp
;
4906 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (*lwps
));
4908 if (ioctl (pip
->ctl_fd
, PIOCLWPIDS
, lwps
))
4910 print_sys_errmsg (pip
-> pathname
, errno
);
4911 error ("PIOCLWPIDS failed");
4913 #else /* PIOCLWPIDS */
4915 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
4917 #endif /* PIOCLWPIDS */
4919 for (; nlwp
> 0; nlwp
--, lwps
++)
4921 pip
= find_procinfo ((*lwps
<< 16) | pid
, 1);
4925 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4926 memset (pip
, 0, sizeof (*pip
));
4927 if (!open_proc_file ((*lwps
<< 16) | pid
, pip
, O_RDONLY
, 0))
4930 make_cleanup (close_proc_file
, pip
);
4932 if (!procfs_read_status (pip
))
4934 print_sys_errmsg (pip
-> pathname
, errno
);
4935 error ("procfs_read_status failed");
4939 #endif /* PROCFS_USE_READ_WRITE */
4941 /* Print verbose information of the requested type(s), or just a summary
4942 of the information for all types. */
4944 printf_filtered ("\nInformation for %s.%d:\n\n", pip
-> pathname
, *lwps
);
4945 if (summary
|| all
|| flags
)
4947 info_proc_flags (pip
, summary
);
4951 info_proc_stop (pip
, summary
);
4953 supply_gregset (&pip
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
4955 supply_gregset (&pip
->prstatus
.pr_reg
);
4957 printf_filtered ("PC: ");
4958 print_address (read_pc (), gdb_stdout
);
4959 printf_filtered ("\n");
4961 if (summary
|| all
|| signals
|| faults
)
4963 info_proc_siginfo (pip
, summary
);
4965 if (summary
|| all
|| syscalls
)
4967 info_proc_syscalls (pip
, summary
);
4969 if (summary
|| all
|| mappings
)
4971 info_proc_mappings (pip
, summary
);
4973 if (summary
|| all
|| signals
)
4975 info_proc_signals (pip
, summary
);
4977 if (summary
|| all
|| faults
)
4979 info_proc_faults (pip
, summary
);
4981 printf_filtered ("\n");
4983 /* All done, deal with closing any temporary process info structure,
4984 freeing temporary memory , etc. */
4986 do_cleanups (old_chain
);
4987 #ifndef PROCFS_USE_READ_WRITE
4996 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
5000 void modify_inherit_on_fork_flag (fd, flag)
5004 Call this routine to modify the inherit-on-fork flag. This routine is
5005 just a nice wrapper to hide the #ifdefs needed by various systems to
5011 modify_inherit_on_fork_flag (fd
, flag
)
5015 #if defined (PIOCSET) || defined (PCSET)
5019 struct proc_ctl pctl
;
5021 #if defined (PIOCSET) || defined (PCSET) /* New method */
5025 #ifdef PROCFS_USE_READ_WRITE
5027 pctl
.data
= PR_FORK
;
5028 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5031 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5036 #ifdef PROCFS_USE_READ_WRITE
5038 pctl
.data
= PR_FORK
;
5039 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5042 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5047 #ifdef PIOCSFORK /* Original method */
5050 retval
= ioctl (fd
, PIOCSFORK
, NULL
);
5054 retval
= ioctl (fd
, PIOCRFORK
, NULL
);
5057 Neither PR_FORK nor PIOCSFORK exist
!!!
5064 print_sys_errmsg ("modify_inherit_on_fork_flag", errno
);
5065 error ("PIOCSFORK or PR_FORK modification failed");
5072 modify_run_on_last_close_flag - Change the run-on-last-close flag
5076 void modify_run_on_last_close_flag (fd, flag)
5080 Call this routine to modify the run-on-last-close flag. This routine
5081 is just a nice wrapper to hide the #ifdefs needed by various systems to
5087 modify_run_on_last_close_flag (fd
, flag
)
5091 #if defined (PIOCSET) || defined (PCSET)
5095 struct proc_ctl pctl
;
5097 #if defined (PIOCSET) || defined (PCSET) /* New method */
5101 #ifdef PROCFS_USE_READ_WRITE
5104 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5107 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5112 #ifdef PROCFS_USE_READ_WRITE
5115 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5118 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5123 #ifdef PIOCSRLC /* Original method */
5125 retval
= ioctl (fd
, PIOCSRLC
, NULL
);
5127 retval
= ioctl (fd
, PIOCRRLC
, NULL
);
5129 Neither PR_RLC nor PIOCSRLC exist
!!!
5136 print_sys_errmsg ("modify_run_on_last_close_flag", errno
);
5137 error ("PIOCSRLC or PR_RLC modification failed");
5144 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5148 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5152 This function function disables traps for the specified system call.
5153 errok is non-zero if errors should be ignored.
5157 procfs_clear_syscall_trap (pi
, syscall_num
, errok
)
5158 struct procinfo
*pi
;
5166 goterr
= ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0;
5168 if (goterr
&& !errok
)
5170 print_sys_errmsg (pi
->pathname
, errno
);
5171 error ("PIOCGENTRY failed");
5176 prdelset (&sysset
, syscall_num
);
5178 if ((ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0) && !errok
)
5180 print_sys_errmsg (pi
->pathname
, errno
);
5181 error ("PIOCSENTRY failed");
5185 goterr
= ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0;
5187 if (goterr
&& !errok
)
5189 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5190 print_sys_errmsg (pi
->pathname
, errno
);
5191 error ("PIOCGEXIT failed");
5196 praddset (&sysset
, syscall_num
);
5198 if ((ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0) && !errok
)
5200 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5201 print_sys_errmsg (pi
->pathname
, errno
);
5202 error ("PIOCSEXIT failed");
5207 if (!pi
->syscall_handlers
)
5210 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5214 /* Remove handler func from the handler list */
5216 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5217 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5219 if (i
+ 1 != pi
->num_syscall_handlers
)
5220 { /* Not the last entry.
5221 Move subsequent entries fwd. */
5222 memcpy (&pi
->syscall_handlers
[i
], &pi
->syscall_handlers
[i
+ 1],
5223 (pi
->num_syscall_handlers
- i
- 1)
5224 * sizeof (struct procfs_syscall_handler
));
5227 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
,
5228 (pi
->num_syscall_handlers
- 1)
5229 * sizeof (struct procfs_syscall_handler
));
5230 pi
->num_syscall_handlers
--;
5235 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5243 procfs_set_syscall_trap -- arrange for a function to be called when the
5244 child executes the specified system call.
5248 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5249 syscall_func_t *function)
5253 This function sets up an entry and/or exit trap for the specified system
5254 call. When the child executes the specified system call, your function
5255 will be called with the call #, a flag that indicates entry or exit, and
5256 pointers to rtnval and statval (which are used by procfs_wait). The
5257 function should return non-zero if something interesting happened, zero
5262 procfs_set_syscall_trap (pi
, syscall_num
, flags
, func
)
5263 struct procinfo
*pi
;
5266 syscall_func_t
*func
;
5271 if (flags
& PROCFS_SYSCALL_ENTRY
)
5273 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0)
5275 print_sys_errmsg (pi
->pathname
, errno
);
5276 error ("PIOCGENTRY failed");
5279 praddset (&sysset
, syscall_num
);
5281 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0)
5283 print_sys_errmsg (pi
->pathname
, errno
);
5284 error ("PIOCSENTRY failed");
5288 if (flags
& PROCFS_SYSCALL_EXIT
)
5290 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0)
5292 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5293 print_sys_errmsg (pi
->pathname
, errno
);
5294 error ("PIOCGEXIT failed");
5297 praddset (&sysset
, syscall_num
);
5299 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0)
5301 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5302 print_sys_errmsg (pi
->pathname
, errno
);
5303 error ("PIOCSEXIT failed");
5308 if (!pi
->syscall_handlers
)
5310 pi
->syscall_handlers
= xmalloc (sizeof (struct procfs_syscall_handler
));
5311 pi
->syscall_handlers
[0].syscall_num
= syscall_num
;
5312 pi
->syscall_handlers
[0].func
= func
;
5313 pi
->num_syscall_handlers
= 1;
5319 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5320 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5322 pi
->syscall_handlers
[i
].func
= func
;
5326 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
, (i
+ 1)
5327 * sizeof (struct procfs_syscall_handler
));
5328 pi
->syscall_handlers
[i
].syscall_num
= syscall_num
;
5329 pi
->syscall_handlers
[i
].func
= func
;
5330 pi
->num_syscall_handlers
++;
5334 #ifdef SYS_lwp_create
5340 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5344 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5348 This routine is called both when an inferior process and it's new lwp
5349 are about to finish a _lwp_create() system call. This is the system
5350 call that Solaris uses to create a lightweight process. When the
5351 target process gets this event, we can look at sysarg[2] to find the
5352 new childs lwp ID, and create a procinfo struct from that. After that,
5353 we pretend that we got a SIGTRAP, and return non-zero to tell
5354 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5355 sees the new process and continues it.
5357 When we see the child exiting from lwp_create, we just contine it,
5358 since everything was handled when the parent trapped.
5361 In effect, we are only paying attention to the parent's completion of
5362 the lwp_create syscall. If we only paid attention to the child
5363 instead, then we wouldn't detect the creation of a suspended thread.
5367 procfs_lwp_creation_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
5368 struct procinfo
*pi
;
5375 struct procinfo
*childpi
;
5376 struct proc_ctl pctl
;
5378 /* We've just detected the completion of an lwp_create system call. Now we
5379 need to setup a procinfo struct for this thread, and notify the thread
5380 system of the new arrival. */
5382 /* If lwp_create failed, then nothing interesting happened. Continue the
5383 process and go back to sleep. */
5386 /* Joel ... can you check this logic out please? JKJ */
5387 if (pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
[R_EFL
] & 1)
5388 { /* _lwp_create failed */
5390 pctl
.data
= PRCFAULT
;
5392 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5393 perror_with_name (pi
->pathname
);
5397 #else /* UNIXWARE */
5398 if (PROCFS_GET_CARRY (pi
->prstatus
.pr_reg
))
5399 { /* _lwp_create failed */
5400 pi
->prrun
.pr_flags
&= PRSTEP
;
5401 pi
->prrun
.pr_flags
|= PRCFAULT
;
5403 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5404 perror_with_name (pi
->pathname
);
5410 /* At this point, the new thread is stopped at it's first instruction, and
5411 the parent is stopped at the exit from lwp_create. */
5413 if (pi
->new_child
) /* Child? */
5414 { /* Yes, just continue it */
5417 pctl
.data
= PRCFAULT
;
5419 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5420 #else /* !UNIXWARE */
5421 pi
->prrun
.pr_flags
&= PRSTEP
;
5422 pi
->prrun
.pr_flags
|= PRCFAULT
;
5424 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
5425 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5426 #endif /* !UNIXWARE */
5427 perror_with_name (pi
->pathname
);
5429 pi
->new_child
= 0; /* No longer new */
5434 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5435 in the child and continue the parent. */
5437 /* Third arg is pointer to new thread id. */
5439 lwp_id
= read_memory_integer (pi
->prstatus
.pr_lwp
.pr_sysarg
[2], sizeof (int));
5441 lwp_id
= read_memory_integer (pi
->prstatus
.pr_sysarg
[2], sizeof (int));
5444 lwp_id
= (lwp_id
<< 16) | PIDGET (pi
->pid
);
5446 childpi
= create_procinfo (lwp_id
);
5448 /* The new process has actually inherited the lwp_create syscall trap from
5449 it's parent, but we still have to call this to register handlers for
5452 procfs_set_inferior_syscall_traps (childpi
);
5453 add_thread (lwp_id
);
5454 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id
));
5456 /* Continue the parent */
5459 pctl
.data
= PRCFAULT
;
5461 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5463 pi
->prrun
.pr_flags
&= PRSTEP
;
5464 pi
->prrun
.pr_flags
|= PRCFAULT
;
5465 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5467 perror_with_name (pi
->pathname
);
5469 /* The new child may have been created in one of two states:
5470 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5471 If suspended, we flag it to be continued later, when it has an event. */
5474 if (childpi
->prstatus
.pr_lwp
.pr_why
== PR_SUSPENDED
)
5476 if (childpi
->prstatus
.pr_why
== PR_SUSPENDED
)
5478 childpi
->new_child
= 1; /* Flag this as an unseen child process */
5481 /* Continue the child */
5484 pctl
.data
= PRCFAULT
;
5486 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5488 childpi
->prrun
.pr_flags
&= PRSTEP
;
5489 childpi
->prrun
.pr_flags
|= PRCFAULT
;
5491 if (ioctl (childpi
->ctl_fd
, PIOCRUN
, &childpi
->prrun
) != 0)
5493 perror_with_name (childpi
->pathname
);
5497 #endif /* SYS_lwp_create */
5499 /* Fork an inferior process, and start debugging it with /proc. */
5502 procfs_create_inferior (exec_file
, allargs
, env
)
5507 char *shell_file
= getenv ("SHELL");
5509 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
5512 /* We will be looking down the PATH to find shell_file. If we
5513 just do this the normal way (via execlp, which operates by
5514 attempting an exec for each element of the PATH until it
5515 finds one which succeeds), then there will be an exec for
5516 each failed attempt, each of which will cause a PR_SYSEXIT
5517 stop, and we won't know how to distinguish the PR_SYSEXIT's
5518 for these failed execs with the ones for successful execs
5519 (whether the exec has succeeded is stored at that time in the
5520 carry bit or some such architecture-specific and
5521 non-ABI-specified place).
5523 So I can't think of anything better than to search the PATH
5524 now. This has several disadvantages: (1) There is a race
5525 condition; if we find a file now and it is deleted before we
5526 exec it, we lose, even if the deletion leaves a valid file
5527 further down in the PATH, (2) there is no way to know exactly
5528 what an executable (in the sense of "capable of being
5529 exec'd") file is. Using access() loses because it may lose
5530 if the caller is the superuser; failing to use it loses if
5531 there are ACLs or some such. */
5535 /* FIXME-maybe: might want "set path" command so user can change what
5536 path is used from within GDB. */
5537 char *path
= getenv ("PATH");
5539 struct stat statbuf
;
5542 path
= "/bin:/usr/bin";
5544 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
5545 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1: NULL
)
5547 p1
= strchr (p
, ':');
5552 strncpy (tryname
, p
, len
);
5553 tryname
[len
] = '\0';
5554 strcat (tryname
, "/");
5555 strcat (tryname
, shell_file
);
5556 if (access (tryname
, X_OK
) < 0)
5558 if (stat (tryname
, &statbuf
) < 0)
5560 if (!S_ISREG (statbuf
.st_mode
))
5561 /* We certainly need to reject directories. I'm not quite
5562 as sure about FIFOs, sockets, etc., but I kind of doubt
5563 that people want to exec() these things. */
5568 /* Not found. This must be an error rather than merely passing
5569 the file to execlp(), because execlp() would try all the
5570 exec()s, causing GDB to get confused. */
5571 error ("Can't find shell %s in PATH", shell_file
);
5573 shell_file
= tryname
;
5576 fork_inferior (exec_file
, allargs
, env
,
5577 proc_set_exec_trap
, procfs_init_inferior
, shell_file
);
5579 /* We are at the first instruction we care about. */
5580 /* Pedal to the metal... */
5582 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
5585 /* Clean up after the inferior dies. */
5588 procfs_mourn_inferior ()
5590 struct procinfo
*pi
;
5591 struct procinfo
*next_pi
;
5593 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5596 unconditionally_kill_inferior (pi
);
5599 unpush_target (&procfs_ops
);
5600 generic_mourn_inferior ();
5604 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5608 /* This variable is controlled by modules that sit atop procfs that may layer
5609 their own process structure atop that provided here. sol-thread.c does
5610 this because of the Solaris two-level thread model. */
5612 return !procfs_suppress_run
;
5614 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5617 /* Insert a watchpoint */
5619 procfs_set_watchpoint(pid
, addr
, len
, rw
)
5625 struct procinfo
*pi
;
5628 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5629 wpt
.pr_vaddr
= (caddr_t
)addr
;
5631 wpt
.pr_wflags
= ((rw
& 1) ? MA_READ
: 0) | ((rw
& 2) ? MA_WRITE
: 0);
5632 if (ioctl (pi
->ctl_fd
, PIOCSWATCH
, &wpt
) < 0)
5636 /* Currently it sometimes happens that the same watchpoint gets
5637 deleted twice - don't die in this case (FIXME please) */
5638 if (errno
== ESRCH
&& len
== 0)
5640 print_sys_errmsg (pi
->pathname
, errno
);
5641 error ("PIOCSWATCH failed");
5647 procfs_stopped_by_watchpoint(pid
)
5650 struct procinfo
*pi
;
5654 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5655 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
5657 why
= pi
->prstatus
.pr_why
;
5658 what
= pi
->prstatus
.pr_what
;
5659 if (why
== PR_FAULTED
5660 #if defined (FLTWATCH) && defined (FLTKWATCH)
5661 && (what
== FLTWATCH
|| what
== FLTKWATCH
)
5664 && (what
== FLTWATCH
)
5667 && (what
== FLTKWATCH
)
5675 #endif /* !UNIXWARE */
5676 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5678 /* Why is this necessary? Shouldn't dead threads just be removed from the
5682 procfs_thread_alive (pid
)
5685 struct procinfo
*pi
, *next_pi
;
5687 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5690 if (pi
-> pid
== pid
)
5691 if (procfs_read_status (pi
)) /* alive */
5693 else /* defunct (exited) */
5695 close_proc_file (pi
);
5703 procfs_first_available ()
5705 struct procinfo
*pi
;
5707 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
5709 if (procfs_read_status (pi
))
5716 procfs_get_pid_fd (pid
)
5719 struct procinfo
*pi
= find_procinfo (pid
, 1);
5727 /* Send a SIGINT to the process group. This acts just like the user typed a
5728 ^C on the controlling terminal.
5730 XXX - This may not be correct for all systems. Some may want to use
5731 killpg() instead of kill (-pgrp). */
5736 extern pid_t inferior_process_group
;
5738 kill (-inferior_process_group
, SIGINT
);
5741 /* Convert a pid to printable form. */
5745 procfs_pid_to_str (pid
)
5748 static char buf
[100];
5750 sprintf (buf
, "Kernel thread %d", TIDGET (pid
));
5756 struct target_ops procfs_ops
= {
5757 "procfs", /* to_shortname */
5758 "Unix /proc child process", /* to_longname */
5759 "Unix /proc child process (started by the \"run\" command).", /* to_doc */
5760 procfs_open
, /* to_open */
5762 procfs_attach
, /* to_attach */
5763 NULL
, /* to_post_attach */
5764 procfs_attach
, /* to_require_attach */
5765 procfs_detach
, /* to_detach */
5766 procfs_detach
, /* to_require_detach */
5767 procfs_resume
, /* to_resume */
5768 procfs_wait
, /* to_wait */
5769 NULL
, /* to_post_wait */
5770 procfs_fetch_registers
, /* to_fetch_registers */
5771 procfs_store_registers
, /* to_store_registers */
5772 procfs_prepare_to_store
, /* to_prepare_to_store */
5773 procfs_xfer_memory
, /* to_xfer_memory */
5774 procfs_files_info
, /* to_files_info */
5775 memory_insert_breakpoint
, /* to_insert_breakpoint */
5776 memory_remove_breakpoint
, /* to_remove_breakpoint */
5777 terminal_init_inferior
, /* to_terminal_init */
5778 terminal_inferior
, /* to_terminal_inferior */
5779 terminal_ours_for_output
, /* to_terminal_ours_for_output */
5780 terminal_ours
, /* to_terminal_ours */
5781 child_terminal_info
, /* to_terminal_info */
5782 procfs_kill_inferior
, /* to_kill */
5784 0, /* to_lookup_symbol */
5785 procfs_create_inferior
, /* to_create_inferior */
5786 NULL
, /* to_post_startup_inferior */
5787 NULL
, /* to_acknowledge_created_inferior */
5788 NULL
, /* to_clone_and_follow_inferior */
5789 NULL
, /* to_post_follow_inferior_by_clone */
5790 NULL
, /* to_insert_fork_catchpoint */
5791 NULL
, /* to_remove_fork_catchpoint */
5792 NULL
, /* to_insert_vfork_catchpoint */
5793 NULL
, /* to_remove_vfork_catchpoint */
5794 NULL
, /* to_has_forked */
5795 NULL
, /* to_has_vforked */
5796 NULL
, /* to_can_follow_vfork_prior_to_exec */
5797 NULL
, /* to_post_follow_vfork */
5798 NULL
, /* to_insert_exec_catchpoint */
5799 NULL
, /* to_remove_exec_catchpoint */
5800 NULL
, /* to_has_execd */
5801 NULL
, /* to_reported_exec_events_per_exec_call */
5802 NULL
, /* to_has_syscall_event */
5803 NULL
, /* to_has_exited */
5804 procfs_mourn_inferior
, /* to_mourn_inferior */
5805 procfs_can_run
, /* to_can_run */
5806 procfs_notice_signals
, /* to_notice_signals */
5807 procfs_thread_alive
, /* to_thread_alive */
5808 procfs_stop
, /* to_stop */
5809 NULL
, /* to_enable_exception_callback */
5810 NULL
, /* to_get_current_exception_event */
5811 NULL
, /* to_pid_to_exec_file */
5812 NULL
, /* to_core_file_to_sym_file */
5813 process_stratum
, /* to_stratum */
5815 1, /* to_has_all_memory */
5816 1, /* to_has_memory */
5817 1, /* to_has_stack */
5818 1, /* to_has_registers */
5819 1, /* to_has_execution */
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 ();