1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
2 Copyright 1991, 1992-98, 1999 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 */
94 /* Wrap Light Weight Process member in THE_PR_LWP macro for clearer code */
95 #ifndef HAVE_PSTATUS_T
96 typedef prstatus_t gdb_prstatus_t
;
97 #define THE_PR_LWP(a) a
98 #else /* HAVE_PSTATUS_T */
99 typedef pstatus_t gdb_prstatus_t
;
100 #define THE_PR_LWP(a) a.pr_lwp
101 #if !defined(HAVE_PRRUN_T) && defined(HAVE_MULTIPLE_PROC_FDS)
102 /* Fallback definitions - for using configure information directly */
106 #if !defined(PROCFS_USE_READ_WRITE) && !defined(HAVE_PROCFS_PIOCSET)
107 #define PROCFS_USE_READ_WRITE 1
109 #endif /* !HAVE_PRRUN_T && HAVE_MULTIPLE_PROC_FDS */
110 #endif /* HAVE_PSTATUS_T */
112 #define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
114 /* proc name formats may vary depending on the proc implementation */
115 #ifdef HAVE_MULTIPLE_PROC_FDS
116 # ifndef CTL_PROC_NAME_FMT
117 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
118 # define AS_PROC_NAME_FMT "/proc/%d/as"
119 # define MAP_PROC_NAME_FMT "/proc/%d/map"
120 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
122 #else /* HAVE_MULTIPLE_PROC_FDS */
123 # ifndef CTL_PROC_NAME_FMT
124 # define CTL_PROC_NAME_FMT "/proc/%05d"
125 # define AS_PROC_NAME_FMT "/proc/%05d"
126 # define MAP_PROC_NAME_FMT "/proc/%05d"
127 # define STATUS_PROC_NAME_FMT "/proc/%05d"
129 #endif /* HAVE_MULTIPLE_PROC_FDS */
132 /* These #ifdefs are for sol2.x in particular. sol2.x has
133 both a "gregset_t" and a "prgregset_t", which have
134 similar uses but different layouts. sol2.x gdb tries to
135 use prgregset_t (and prfpregset_t) everywhere. */
137 #ifdef GDB_GREGSET_TYPE
138 typedef GDB_GREGSET_TYPE gdb_gregset_t
;
140 typedef gregset_t gdb_gregset_t
;
143 #ifdef GDB_FPREGSET_TYPE
144 typedef GDB_FPREGSET_TYPE gdb_fpregset_t
;
146 typedef fpregset_t gdb_fpregset_t
;
150 #define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
152 struct target_ops procfs_ops
;
154 int procfs_suppress_run
= 0; /* Non-zero if procfs should pretend not to
155 be a runnable target. Used by targets
156 that can sit atop procfs, such as solaris
159 #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
160 CORE_ADDR kernel_u_addr
;
163 #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
165 #define si_pid _data._proc.pid
167 #define si_uid _data._proc._pdata._kill.uid
168 #endif /* BROKEN_SIGINFO_H */
170 /* Define structures for passing commands to /proc/pid/ctl file. Note that
171 while we create these for the PROCFS_USE_READ_WRITE world, we use them
172 and ignore the extra cmd int in other proc schemes.
174 /* generic ctl msg */
180 /* set general registers */
183 gdb_gregset_t gregset
;
186 /* set fp registers */
189 gdb_fpregset_t fpregset
;
192 /* set signals to be traced */
198 /* set faults to be traced */
204 /* set system calls to be traced */
210 /* set current signal to be traced */
216 /* All access to the inferior, either one started by gdb or one that has
217 been attached to, is controlled by an instance of a procinfo structure,
218 defined below. Since gdb currently only handles one inferior at a time,
219 the procinfo structure for the inferior is statically allocated and
220 only one exists at any given time. There is a separate procinfo
221 structure for use by the "info proc" command, so that we can print
222 useful information about any random process without interfering with
223 the inferior's procinfo information. */
226 struct procinfo
*next
;
227 int pid
; /* Process ID of inferior */
228 int ctl_fd
; /* File descriptor for /proc ctl file */
229 int status_fd
; /* File descriptor for /proc status file */
230 int as_fd
; /* File descriptor for /proc as file */
231 int map_fd
; /* File descriptor for /proc map file */
232 char *pathname
; /* Pathname to /proc entry */
233 int had_event
; /* poll/select says something happened */
234 int was_stopped
; /* Nonzero if was stopped prior to attach */
235 int nopass_next_sigstop
; /* Don't pass a sigstop on next resume */
237 prrun_t prrun
; /* Control state when it is run */
239 gdb_prstatus_t prstatus
; /* Current process status info */
240 struct greg_ctl gregset
; /* General register set */
241 struct fpreg_ctl fpregset
; /* Floating point register set */
242 struct flt_ctl fltset
; /* Current traced hardware fault set */
243 struct sig_ctl trace
; /* Current traced signal set */
244 struct sys_ctl exitset
; /* Current traced system call exit set */
245 struct sys_ctl entryset
; /* Current traced system call entry set */
246 struct sig_ctl saved_sighold
; /* Saved held signal set */
247 struct flt_ctl saved_fltset
; /* Saved traced hardware fault set */
248 struct sig_ctl saved_trace
; /* Saved traced signal set */
249 struct sys_ctl saved_exitset
; /* Saved traced system call exit set */
250 struct sys_ctl saved_entryset
;/* Saved traced system call entry set */
251 int num_syscall_handlers
; /* Number of syscall trap handlers
252 currently installed */
253 /* Pointer to list of syscall trap handlers */
254 struct procfs_syscall_handler
*syscall_handlers
;
255 int saved_rtnval
; /* return value and status for wait(), */
256 int saved_statval
; /* as supplied by a syscall handler. */
257 int new_child
; /* Non-zero if it's a new thread */
260 /* List of inferior process information */
261 static struct procinfo
*procinfo_list
= NULL
;
262 static struct pollfd
*poll_list
; /* pollfds used for waiting on /proc */
264 static int num_poll_list
= 0; /* Number of entries in poll_list */
266 /* Much of the information used in the /proc interface, particularly for
267 printing status information, is kept as tables of structures of the
268 following form. These tables can be used to map numeric values to
269 their symbolic names and to a string that describes their specific use. */
272 int value
; /* The numeric value */
273 char *name
; /* The equivalent symbolic value */
274 char *desc
; /* Short description of value */
277 /* Translate bits in the pr_flags member of the prstatus structure, into the
278 names and desc information. */
280 static struct trans pr_flag_table
[] =
282 #if defined (PR_STOPPED)
283 { PR_STOPPED
, "PR_STOPPED", "Process is stopped" },
285 #if defined (PR_ISTOP)
286 { PR_ISTOP
, "PR_ISTOP", "Stopped on an event of interest" },
288 #if defined (PR_DSTOP)
289 { PR_DSTOP
, "PR_DSTOP", "A stop directive is in effect" },
291 #if defined (PR_ASLEEP)
292 { PR_ASLEEP
, "PR_ASLEEP", "Sleeping in an interruptible system call" },
294 #if defined (PR_FORK)
295 { PR_FORK
, "PR_FORK", "Inherit-on-fork is in effect" },
298 { PR_RLC
, "PR_RLC", "Run-on-last-close is in effect" },
300 #if defined (PR_PTRACE)
301 { PR_PTRACE
, "PR_PTRACE", "Process is being controlled by ptrace" },
303 #if defined (PR_PCINVAL)
304 { PR_PCINVAL
, "PR_PCINVAL", "PC refers to an invalid virtual address" },
306 #if defined (PR_ISSYS)
307 { PR_ISSYS
, "PR_ISSYS", "Is a system process" },
309 #if defined (PR_STEP)
310 { PR_STEP
, "PR_STEP", "Process has single step pending" },
313 { PR_KLC
, "PR_KLC", "Kill-on-last-close is in effect" },
315 #if defined (PR_ASYNC)
316 { PR_ASYNC
, "PR_ASYNC", "Asynchronous stop is in effect" },
318 #if defined (PR_PCOMPAT)
319 { PR_PCOMPAT
, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
321 #if defined (PR_MSACCT)
322 { PR_MSACCT
, "PR_MSACCT", "Microstate accounting enabled" },
324 #if defined (PR_BPTADJ)
325 { PR_BPTADJ
, "PR_BPTADJ", "Breakpoint PC adjustment in effect" },
327 #if defined (PR_ASLWP)
328 { PR_ASLWP
, "PR_ASLWP", "Asynchronus signal LWP" },
333 /* Translate values in the pr_why field of the prstatus struct. */
335 static struct trans pr_why_table
[] =
337 #if defined (PR_REQUESTED)
338 { PR_REQUESTED
, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
340 #if defined (PR_SIGNALLED)
341 { PR_SIGNALLED
, "PR_SIGNALLED", "Receipt of a traced signal" },
343 #if defined (PR_SYSENTRY)
344 { PR_SYSENTRY
, "PR_SYSENTRY", "Entry to a traced system call" },
346 #if defined (PR_SYSEXIT)
347 { PR_SYSEXIT
, "PR_SYSEXIT", "Exit from a traced system call" },
349 #if defined (PR_JOBCONTROL)
350 { PR_JOBCONTROL
, "PR_JOBCONTROL", "Default job control stop signal action" },
352 #if defined (PR_FAULTED)
353 { PR_FAULTED
, "PR_FAULTED", "Incurred a traced hardware fault" },
355 #if defined (PR_SUSPENDED)
356 { PR_SUSPENDED
, "PR_SUSPENDED", "Process suspended" },
358 #if defined (PR_CHECKPOINT)
359 { PR_CHECKPOINT
, "PR_CHECKPOINT", "(???)" },
364 /* Hardware fault translation table. */
366 static struct trans faults_table
[] =
369 { FLTILL
, "FLTILL", "Illegal instruction" },
371 #if defined (FLTPRIV)
372 { FLTPRIV
, "FLTPRIV", "Privileged instruction" },
375 { FLTBPT
, "FLTBPT", "Breakpoint trap" },
377 #if defined (FLTTRACE)
378 { FLTTRACE
, "FLTTRACE", "Trace trap" },
380 #if defined (FLTACCESS)
381 { FLTACCESS
, "FLTACCESS", "Memory access fault" },
383 #if defined (FLTBOUNDS)
384 { FLTBOUNDS
, "FLTBOUNDS", "Memory bounds violation" },
386 #if defined (FLTIOVF)
387 { FLTIOVF
, "FLTIOVF", "Integer overflow" },
389 #if defined (FLTIZDIV)
390 { FLTIZDIV
, "FLTIZDIV", "Integer zero divide" },
393 { FLTFPE
, "FLTFPE", "Floating-point exception" },
395 #if defined (FLTSTACK)
396 { FLTSTACK
, "FLTSTACK", "Unrecoverable stack fault" },
398 #if defined (FLTPAGE)
399 { FLTPAGE
, "FLTPAGE", "Recoverable page fault" },
404 /* Translation table for signal generation information. See UNIX System
405 V Release 4 Programmer's Reference Manual, siginfo(5). */
407 static struct sigcode
{
412 } siginfo_table
[] = {
413 #if defined (SIGILL) && defined (ILL_ILLOPC)
414 { SIGILL
, ILL_ILLOPC
, "ILL_ILLOPC", "Illegal opcode" },
416 #if defined (SIGILL) && defined (ILL_ILLOPN)
417 { SIGILL
, ILL_ILLOPN
, "ILL_ILLOPN", "Illegal operand", },
419 #if defined (SIGILL) && defined (ILL_ILLADR)
420 { SIGILL
, ILL_ILLADR
, "ILL_ILLADR", "Illegal addressing mode" },
422 #if defined (SIGILL) && defined (ILL_ILLTRP)
423 { SIGILL
, ILL_ILLTRP
, "ILL_ILLTRP", "Illegal trap" },
425 #if defined (SIGILL) && defined (ILL_PRVOPC)
426 { SIGILL
, ILL_PRVOPC
, "ILL_PRVOPC", "Privileged opcode" },
428 #if defined (SIGILL) && defined (ILL_PRVREG)
429 { SIGILL
, ILL_PRVREG
, "ILL_PRVREG", "Privileged register" },
431 #if defined (SIGILL) && defined (ILL_COPROC)
432 { SIGILL
, ILL_COPROC
, "ILL_COPROC", "Coprocessor error" },
434 #if defined (SIGILL) && defined (ILL_BADSTK)
435 { SIGILL
, ILL_BADSTK
, "ILL_BADSTK", "Internal stack error" },
437 #if defined (SIGFPE) && defined (FPE_INTDIV)
438 { SIGFPE
, FPE_INTDIV
, "FPE_INTDIV", "Integer divide by zero" },
440 #if defined (SIGFPE) && defined (FPE_INTOVF)
441 { SIGFPE
, FPE_INTOVF
, "FPE_INTOVF", "Integer overflow" },
443 #if defined (SIGFPE) && defined (FPE_FLTDIV)
444 { SIGFPE
, FPE_FLTDIV
, "FPE_FLTDIV", "Floating point divide by zero" },
446 #if defined (SIGFPE) && defined (FPE_FLTOVF)
447 { SIGFPE
, FPE_FLTOVF
, "FPE_FLTOVF", "Floating point overflow" },
449 #if defined (SIGFPE) && defined (FPE_FLTUND)
450 { SIGFPE
, FPE_FLTUND
, "FPE_FLTUND", "Floating point underflow" },
452 #if defined (SIGFPE) && defined (FPE_FLTRES)
453 { SIGFPE
, FPE_FLTRES
, "FPE_FLTRES", "Floating point inexact result" },
455 #if defined (SIGFPE) && defined (FPE_FLTINV)
456 { SIGFPE
, FPE_FLTINV
, "FPE_FLTINV", "Invalid floating point operation" },
458 #if defined (SIGFPE) && defined (FPE_FLTSUB)
459 { SIGFPE
, FPE_FLTSUB
, "FPE_FLTSUB", "Subscript out of range" },
461 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
462 { SIGSEGV
, SEGV_MAPERR
, "SEGV_MAPERR", "Address not mapped to object" },
464 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
465 { SIGSEGV
, SEGV_ACCERR
, "SEGV_ACCERR", "Invalid permissions for object" },
467 #if defined (SIGBUS) && defined (BUS_ADRALN)
468 { SIGBUS
, BUS_ADRALN
, "BUS_ADRALN", "Invalid address alignment" },
470 #if defined (SIGBUS) && defined (BUS_ADRERR)
471 { SIGBUS
, BUS_ADRERR
, "BUS_ADRERR", "Non-existent physical address" },
473 #if defined (SIGBUS) && defined (BUS_OBJERR)
474 { SIGBUS
, BUS_OBJERR
, "BUS_OBJERR", "Object specific hardware error" },
476 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
477 { SIGTRAP
, TRAP_BRKPT
, "TRAP_BRKPT", "Process breakpoint" },
479 #if defined (SIGTRAP) && defined (TRAP_TRACE)
480 { SIGTRAP
, TRAP_TRACE
, "TRAP_TRACE", "Process trace trap" },
482 #if defined (SIGCLD) && defined (CLD_EXITED)
483 { SIGCLD
, CLD_EXITED
, "CLD_EXITED", "Child has exited" },
485 #if defined (SIGCLD) && defined (CLD_KILLED)
486 { SIGCLD
, CLD_KILLED
, "CLD_KILLED", "Child was killed" },
488 #if defined (SIGCLD) && defined (CLD_DUMPED)
489 { SIGCLD
, CLD_DUMPED
, "CLD_DUMPED", "Child has terminated abnormally" },
491 #if defined (SIGCLD) && defined (CLD_TRAPPED)
492 { SIGCLD
, CLD_TRAPPED
, "CLD_TRAPPED", "Traced child has trapped" },
494 #if defined (SIGCLD) && defined (CLD_STOPPED)
495 { SIGCLD
, CLD_STOPPED
, "CLD_STOPPED", "Child has stopped" },
497 #if defined (SIGCLD) && defined (CLD_CONTINUED)
498 { SIGCLD
, CLD_CONTINUED
, "CLD_CONTINUED", "Stopped child had continued" },
500 #if defined (SIGPOLL) && defined (POLL_IN)
501 { SIGPOLL
, POLL_IN
, "POLL_IN", "Input input available" },
503 #if defined (SIGPOLL) && defined (POLL_OUT)
504 { SIGPOLL
, POLL_OUT
, "POLL_OUT", "Output buffers available" },
506 #if defined (SIGPOLL) && defined (POLL_MSG)
507 { SIGPOLL
, POLL_MSG
, "POLL_MSG", "Input message available" },
509 #if defined (SIGPOLL) && defined (POLL_ERR)
510 { SIGPOLL
, POLL_ERR
, "POLL_ERR", "I/O error" },
512 #if defined (SIGPOLL) && defined (POLL_PRI)
513 { SIGPOLL
, POLL_PRI
, "POLL_PRI", "High priority input available" },
515 #if defined (SIGPOLL) && defined (POLL_HUP)
516 { SIGPOLL
, POLL_HUP
, "POLL_HUP", "Device disconnected" },
521 static char *syscall_table
[MAX_SYSCALLS
];
523 /* Prototypes for local functions */
525 static void procfs_stop
PARAMS ((void));
527 static int procfs_thread_alive
PARAMS ((int));
529 static int procfs_can_run
PARAMS ((void));
531 static void procfs_mourn_inferior
PARAMS ((void));
533 static void procfs_fetch_registers
PARAMS ((int));
535 static int procfs_wait
PARAMS ((int, struct target_waitstatus
*));
537 static void procfs_open
PARAMS ((char *, int));
539 static void procfs_files_info
PARAMS ((struct target_ops
*));
541 static void procfs_prepare_to_store
PARAMS ((void));
543 static void procfs_detach
PARAMS ((char *, int));
545 static void procfs_attach
PARAMS ((char *, int));
547 static void proc_set_exec_trap
PARAMS ((void));
549 static void procfs_init_inferior
PARAMS ((int));
551 static struct procinfo
*create_procinfo
PARAMS ((int));
553 static void procfs_store_registers
PARAMS ((int));
555 static int procfs_xfer_memory
PARAMS ((CORE_ADDR
, char *, int, int, struct target_ops
*));
557 static void procfs_kill_inferior
PARAMS ((void));
559 static char *sigcodedesc
PARAMS ((siginfo_t
*));
561 static char *sigcodename
PARAMS ((siginfo_t
*));
563 static struct procinfo
*wait_fd
PARAMS ((void));
565 static void remove_fd
PARAMS ((struct procinfo
*));
567 static void add_fd
PARAMS ((struct procinfo
*));
569 static void set_proc_siginfo
PARAMS ((struct procinfo
*, int));
571 static void init_syscall_table
PARAMS ((void));
573 static char *syscallname
PARAMS ((int));
575 static char *signalname
PARAMS ((int));
577 static char *errnoname
PARAMS ((int));
579 static int proc_address_to_fd
PARAMS ((struct procinfo
*, CORE_ADDR
, int));
581 static int open_proc_file
PARAMS ((int, struct procinfo
*, int, int));
583 static void close_proc_file
PARAMS ((struct procinfo
*));
585 static void unconditionally_kill_inferior
PARAMS ((struct procinfo
*));
587 static NORETURN
void proc_init_failed
PARAMS ((struct procinfo
*, char *, int)) ATTR_NORETURN
;
589 static void info_proc
PARAMS ((char *, int));
591 static void info_proc_flags
PARAMS ((struct procinfo
*, int));
593 static void info_proc_stop
PARAMS ((struct procinfo
*, int));
595 static void info_proc_siginfo
PARAMS ((struct procinfo
*, int));
597 static void info_proc_syscalls
PARAMS ((struct procinfo
*, int));
599 static void info_proc_mappings
PARAMS ((struct procinfo
*, int));
601 static void info_proc_signals
PARAMS ((struct procinfo
*, int));
603 static void info_proc_faults
PARAMS ((struct procinfo
*, int));
605 static char *mappingflags
PARAMS ((long));
607 static char *lookupname
PARAMS ((struct trans
*, unsigned int, char *));
609 static char *lookupdesc
PARAMS ((struct trans
*, unsigned int));
611 static int do_attach
PARAMS ((int pid
));
613 static void do_detach
PARAMS ((int siggnal
));
615 static void procfs_create_inferior
PARAMS ((char *, char *, char **));
617 static void procfs_notice_signals
PARAMS ((int pid
));
619 static void notice_signals
PARAMS ((struct procinfo
*, struct sig_ctl
*));
621 static struct procinfo
*find_procinfo
PARAMS ((pid_t pid
, int okfail
));
623 static int procfs_write_pcwstop
PARAMS ((struct procinfo
*));
624 static int procfs_read_status
PARAMS ((struct procinfo
*));
625 static void procfs_write_pckill
PARAMS ((struct procinfo
*));
627 typedef int syscall_func_t
PARAMS ((struct procinfo
*pi
, int syscall_num
,
628 int why
, int *rtnval
, int *statval
));
630 static void procfs_set_syscall_trap
PARAMS ((struct procinfo
*pi
,
631 int syscall_num
, int flags
,
632 syscall_func_t
*func
));
634 static void procfs_clear_syscall_trap
PARAMS ((struct procinfo
*pi
,
635 int syscall_num
, int errok
));
637 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
638 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
640 static syscall_func_t procfs_exit_handler
;
642 static syscall_func_t procfs_exec_handler
;
645 static syscall_func_t procfs_sproc_handler
;
646 static syscall_func_t procfs_fork_handler
;
649 #ifdef SYS_lwp_create
650 static syscall_func_t procfs_lwp_creation_handler
;
653 static void modify_inherit_on_fork_flag
PARAMS ((int fd
, int flag
));
654 static void modify_run_on_last_close_flag
PARAMS ((int fd
, int flag
));
658 struct procfs_syscall_handler
660 int syscall_num
; /* The number of the system call being handled */
661 /* The function to be called */
662 syscall_func_t
*func
;
665 static void procfs_resume
PARAMS ((int pid
, int step
,
666 enum target_signal signo
));
668 static void init_procfs_ops
PARAMS ((void));
670 /* External function prototypes that can't be easily included in any
671 header file because the args are typedefs in system include files. */
673 extern void supply_gregset
PARAMS ((gdb_gregset_t
*));
675 extern void fill_gregset
PARAMS ((gdb_gregset_t
*, int));
678 extern void supply_fpregset
PARAMS ((gdb_fpregset_t
*));
680 extern void fill_fpregset
PARAMS ((gdb_fpregset_t
*, int));
687 find_procinfo -- convert a process id to a struct procinfo
691 static struct procinfo * find_procinfo (pid_t pid, int okfail);
695 Given a process id, look it up in the procinfo chain. Returns
696 a struct procinfo *. If can't find pid, then call error(),
697 unless okfail is set, in which case, return NULL;
700 static struct procinfo
*
701 find_procinfo (pid
, okfail
)
705 struct procinfo
*procinfo
;
707 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
708 if (procinfo
->pid
== pid
)
714 error ("procfs (find_procinfo): Couldn't locate pid %d", pid
);
721 current_procinfo -- convert inferior_pid to a struct procinfo
725 static struct procinfo * current_procinfo;
729 Looks up inferior_pid in the procinfo chain. Always returns a
730 struct procinfo *. If process can't be found, we error() out.
733 #define current_procinfo find_procinfo (inferior_pid, 0)
739 add_fd -- Add the fd to the poll/select list
743 static void add_fd (struct procinfo *);
747 Add the fd of the supplied procinfo to the list of fds used for
748 poll/select operations.
755 if (num_poll_list
<= 0)
756 poll_list
= (struct pollfd
*) xmalloc (sizeof (struct pollfd
));
758 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
760 * sizeof (struct pollfd
));
761 poll_list
[num_poll_list
].fd
= pi
->ctl_fd
;
763 poll_list
[num_poll_list
].events
= POLLWRNORM
;
765 poll_list
[num_poll_list
].events
= POLLPRI
;
775 remove_fd -- Remove the fd from the poll/select list
779 static void remove_fd (struct procinfo *);
783 Remove the fd of the supplied procinfo from the list of fds used
784 for poll/select operations.
793 for (i
= 0; i
< num_poll_list
; i
++)
795 if (poll_list
[i
].fd
== pi
->ctl_fd
)
797 if (i
!= num_poll_list
- 1)
798 memcpy (poll_list
+ i
, poll_list
+ i
+ 1,
799 (num_poll_list
- i
- 1) * sizeof (struct pollfd
));
803 if (num_poll_list
== 0)
806 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
808 * sizeof (struct pollfd
));
818 procfs_read_status - get procfs fd status
822 static int procfs_read_status (pi) struct procinfo *pi;
826 Given a pointer to a procinfo struct, get the status of
827 the status_fd in the appropriate way. Returns 0 on failure,
832 procfs_read_status (pi
)
835 #ifdef PROCFS_USE_READ_WRITE
836 if ((lseek (pi
->status_fd
, 0, SEEK_SET
) < 0) ||
837 (read (pi
->status_fd
, (char *) &pi
->prstatus
,
838 sizeof (gdb_prstatus_t
)) != sizeof (gdb_prstatus_t
)))
840 if (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
851 procfs_write_pcwstop - send a PCWSTOP to procfs fd
855 static int procfs_write_pcwstop (pi) struct procinfo *pi;
859 Given a pointer to a procinfo struct, send a PCWSTOP to
860 the ctl_fd in the appropriate way. Returns 0 on failure,
865 procfs_write_pcwstop (pi
)
868 #ifdef PROCFS_USE_READ_WRITE
870 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
872 if (ioctl (pi
->ctl_fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
883 procfs_write_pckill - send a kill to procfs fd
887 static void procfs_write_pckill (pi) struct procinfo *pi;
891 Given a pointer to a procinfo struct, send a kill to
892 the ctl_fd in the appropriate way. Returns 0 on failure,
897 procfs_write_pckill (pi
)
900 #ifdef PROCFS_USE_READ_WRITE
901 struct proc_ctl pctl
;
904 write (pi
->ctl_fd
, &pctl
, sizeof (struct proc_ctl
));
907 ioctl (pi
->ctl_fd
, PIOCKILL
, &signo
);
911 static struct procinfo
*
914 struct procinfo
*pi
, *next_pi
;
920 set_sigint_trap (); /* Causes SIGINT to be passed on to the
928 num_fds
= poll (poll_list
, num_poll_list
, -1);
931 if (num_fds
< 0 && errno
== EINTR
)
933 print_sys_errmsg ("poll failed", errno
);
934 error ("Poll failed, returned %d", num_fds
);
936 #else /* LOSING_POLL */
937 pi
= current_procinfo
;
939 while (!procfs_write_pcwstop (pi
))
943 /* Process exited. */
944 pi
->prstatus
.pr_flags
= 0;
947 else if (errno
!= EINTR
)
949 print_sys_errmsg (pi
->pathname
, errno
);
950 error ("procfs_write_pcwstop failed");
954 #endif /* LOSING_POLL */
956 clear_sigint_trap ();
961 for (i
= 0; i
< num_poll_list
&& num_fds
> 0; i
++)
963 if (0 == (poll_list
[i
].revents
&
964 (POLLWRNORM
| POLLPRI
| POLLERR
| POLLHUP
| POLLNVAL
)))
966 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
969 if (poll_list
[i
].fd
== pi
->ctl_fd
)
972 if ((poll_list
[i
].revents
& POLLHUP
) != 0 ||
973 !procfs_read_status(pi
))
974 { /* The LWP has apparently terminated. */
975 if (num_poll_list
<= 1)
977 pi
->prstatus
.pr_flags
= 0;
982 printf_filtered ("LWP %d exited.\n",
983 (pi
->pid
>> 16) & 0xffff);
984 close_proc_file (pi
);
985 i
--; /* don't skip deleted entry */
987 break; /* already another event to process */
989 goto wait_again
; /* wait for another event */
996 error ("wait_fd: Couldn't find procinfo for fd %d\n",
999 #endif /* LOSING_POLL */
1008 lookupdesc -- translate a value to a summary desc string
1012 static char *lookupdesc (struct trans *transp, unsigned int val);
1016 Given a pointer to a translation table and a value to be translated,
1017 lookup the desc string and return it.
1021 lookupdesc (transp
, val
)
1022 struct trans
*transp
;
1027 for (desc
= NULL
; transp
-> name
!= NULL
; transp
++)
1029 if (transp
-> value
== val
)
1031 desc
= transp
-> desc
;
1036 /* Didn't find a translation for the specified value, set a default one. */
1049 lookupname -- translate a value to symbolic name
1053 static char *lookupname (struct trans *transp, unsigned int val,
1058 Given a pointer to a translation table, a value to be translated,
1059 and a default prefix to return if the value can't be translated,
1060 match the value with one of the translation table entries and
1061 return a pointer to the symbolic name.
1063 If no match is found it just returns the value as a printable string,
1064 with the given prefix. The previous such value, if any, is freed
1069 lookupname (transp
, val
, prefix
)
1070 struct trans
*transp
;
1074 static char *locbuf
;
1077 for (name
= NULL
; transp
-> name
!= NULL
; transp
++)
1079 if (transp
-> value
== val
)
1081 name
= transp
-> name
;
1086 /* Didn't find a translation for the specified value, build a default
1087 one using the specified prefix and return it. The lifetime of
1088 the value is only until the next one is needed. */
1096 locbuf
= xmalloc (strlen (prefix
) + 16);
1097 sprintf (locbuf
, "%s %u", prefix
, val
);
1107 struct sigcode
*scp
;
1109 static char locbuf
[32];
1111 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1113 if ((scp
-> signo
== sip
-> si_signo
) &&
1114 (scp
-> code
== sip
-> si_code
))
1116 name
= scp
-> codename
;
1122 sprintf (locbuf
, "sigcode %u", sip
-> si_signo
);
1132 struct sigcode
*scp
;
1135 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1137 if ((scp
-> signo
== sip
-> si_signo
) &&
1138 (scp
-> code
== sip
-> si_code
))
1146 desc
= "Unrecognized signal or trap use";
1155 syscallname - translate a system call number into a system call name
1159 char *syscallname (int syscallnum)
1163 Given a system call number, translate it into the printable name
1164 of a system call, or into "syscall <num>" if it is an unknown
1169 syscallname (syscallnum
)
1172 static char locbuf
[32];
1174 if (syscallnum
>= 0 && syscallnum
< MAX_SYSCALLS
1175 && syscall_table
[syscallnum
] != NULL
)
1176 return syscall_table
[syscallnum
];
1179 sprintf (locbuf
, "syscall %u", syscallnum
);
1188 init_syscall_table - initialize syscall translation table
1192 void init_syscall_table (void)
1196 Dynamically initialize the translation table to convert system
1197 call numbers into printable system call names. Done once per
1198 gdb run, on initialization.
1202 This is awfully ugly, but preprocessor tricks to make it prettier
1203 tend to be nonportable.
1207 init_syscall_table ()
1209 #if defined (SYS_exit)
1210 syscall_table
[SYS_exit
] = "exit";
1212 #if defined (SYS_fork)
1213 syscall_table
[SYS_fork
] = "fork";
1215 #if defined (SYS_read)
1216 syscall_table
[SYS_read
] = "read";
1218 #if defined (SYS_write)
1219 syscall_table
[SYS_write
] = "write";
1221 #if defined (SYS_open)
1222 syscall_table
[SYS_open
] = "open";
1224 #if defined (SYS_close)
1225 syscall_table
[SYS_close
] = "close";
1227 #if defined (SYS_wait)
1228 syscall_table
[SYS_wait
] = "wait";
1230 #if defined (SYS_creat)
1231 syscall_table
[SYS_creat
] = "creat";
1233 #if defined (SYS_link)
1234 syscall_table
[SYS_link
] = "link";
1236 #if defined (SYS_unlink)
1237 syscall_table
[SYS_unlink
] = "unlink";
1239 #if defined (SYS_exec)
1240 syscall_table
[SYS_exec
] = "exec";
1242 #if defined (SYS_execv)
1243 syscall_table
[SYS_execv
] = "execv";
1245 #if defined (SYS_execve)
1246 syscall_table
[SYS_execve
] = "execve";
1248 #if defined (SYS_chdir)
1249 syscall_table
[SYS_chdir
] = "chdir";
1251 #if defined (SYS_time)
1252 syscall_table
[SYS_time
] = "time";
1254 #if defined (SYS_mknod)
1255 syscall_table
[SYS_mknod
] = "mknod";
1257 #if defined (SYS_chmod)
1258 syscall_table
[SYS_chmod
] = "chmod";
1260 #if defined (SYS_chown)
1261 syscall_table
[SYS_chown
] = "chown";
1263 #if defined (SYS_brk)
1264 syscall_table
[SYS_brk
] = "brk";
1266 #if defined (SYS_stat)
1267 syscall_table
[SYS_stat
] = "stat";
1269 #if defined (SYS_lseek)
1270 syscall_table
[SYS_lseek
] = "lseek";
1272 #if defined (SYS_getpid)
1273 syscall_table
[SYS_getpid
] = "getpid";
1275 #if defined (SYS_mount)
1276 syscall_table
[SYS_mount
] = "mount";
1278 #if defined (SYS_umount)
1279 syscall_table
[SYS_umount
] = "umount";
1281 #if defined (SYS_setuid)
1282 syscall_table
[SYS_setuid
] = "setuid";
1284 #if defined (SYS_getuid)
1285 syscall_table
[SYS_getuid
] = "getuid";
1287 #if defined (SYS_stime)
1288 syscall_table
[SYS_stime
] = "stime";
1290 #if defined (SYS_ptrace)
1291 syscall_table
[SYS_ptrace
] = "ptrace";
1293 #if defined (SYS_alarm)
1294 syscall_table
[SYS_alarm
] = "alarm";
1296 #if defined (SYS_fstat)
1297 syscall_table
[SYS_fstat
] = "fstat";
1299 #if defined (SYS_pause)
1300 syscall_table
[SYS_pause
] = "pause";
1302 #if defined (SYS_utime)
1303 syscall_table
[SYS_utime
] = "utime";
1305 #if defined (SYS_stty)
1306 syscall_table
[SYS_stty
] = "stty";
1308 #if defined (SYS_gtty)
1309 syscall_table
[SYS_gtty
] = "gtty";
1311 #if defined (SYS_access)
1312 syscall_table
[SYS_access
] = "access";
1314 #if defined (SYS_nice)
1315 syscall_table
[SYS_nice
] = "nice";
1317 #if defined (SYS_statfs)
1318 syscall_table
[SYS_statfs
] = "statfs";
1320 #if defined (SYS_sync)
1321 syscall_table
[SYS_sync
] = "sync";
1323 #if defined (SYS_kill)
1324 syscall_table
[SYS_kill
] = "kill";
1326 #if defined (SYS_fstatfs)
1327 syscall_table
[SYS_fstatfs
] = "fstatfs";
1329 #if defined (SYS_pgrpsys)
1330 syscall_table
[SYS_pgrpsys
] = "pgrpsys";
1332 #if defined (SYS_xenix)
1333 syscall_table
[SYS_xenix
] = "xenix";
1335 #if defined (SYS_dup)
1336 syscall_table
[SYS_dup
] = "dup";
1338 #if defined (SYS_pipe)
1339 syscall_table
[SYS_pipe
] = "pipe";
1341 #if defined (SYS_times)
1342 syscall_table
[SYS_times
] = "times";
1344 #if defined (SYS_profil)
1345 syscall_table
[SYS_profil
] = "profil";
1347 #if defined (SYS_plock)
1348 syscall_table
[SYS_plock
] = "plock";
1350 #if defined (SYS_setgid)
1351 syscall_table
[SYS_setgid
] = "setgid";
1353 #if defined (SYS_getgid)
1354 syscall_table
[SYS_getgid
] = "getgid";
1356 #if defined (SYS_signal)
1357 syscall_table
[SYS_signal
] = "signal";
1359 #if defined (SYS_msgsys)
1360 syscall_table
[SYS_msgsys
] = "msgsys";
1362 #if defined (SYS_sys3b)
1363 syscall_table
[SYS_sys3b
] = "sys3b";
1365 #if defined (SYS_sysi86)
1366 syscall_table
[SYS_sysi86
] = "sysi86";
1368 #if defined (SYS_acct)
1369 syscall_table
[SYS_acct
] = "acct";
1371 #if defined (SYS_shmsys)
1372 syscall_table
[SYS_shmsys
] = "shmsys";
1374 #if defined (SYS_semsys)
1375 syscall_table
[SYS_semsys
] = "semsys";
1377 #if defined (SYS_ioctl)
1378 syscall_table
[SYS_ioctl
] = "ioctl";
1380 #if defined (SYS_uadmin)
1381 syscall_table
[SYS_uadmin
] = "uadmin";
1383 #if defined (SYS_utssys)
1384 syscall_table
[SYS_utssys
] = "utssys";
1386 #if defined (SYS_fsync)
1387 syscall_table
[SYS_fsync
] = "fsync";
1389 #if defined (SYS_umask)
1390 syscall_table
[SYS_umask
] = "umask";
1392 #if defined (SYS_chroot)
1393 syscall_table
[SYS_chroot
] = "chroot";
1395 #if defined (SYS_fcntl)
1396 syscall_table
[SYS_fcntl
] = "fcntl";
1398 #if defined (SYS_ulimit)
1399 syscall_table
[SYS_ulimit
] = "ulimit";
1401 #if defined (SYS_rfsys)
1402 syscall_table
[SYS_rfsys
] = "rfsys";
1404 #if defined (SYS_rmdir)
1405 syscall_table
[SYS_rmdir
] = "rmdir";
1407 #if defined (SYS_mkdir)
1408 syscall_table
[SYS_mkdir
] = "mkdir";
1410 #if defined (SYS_getdents)
1411 syscall_table
[SYS_getdents
] = "getdents";
1413 #if defined (SYS_sysfs)
1414 syscall_table
[SYS_sysfs
] = "sysfs";
1416 #if defined (SYS_getmsg)
1417 syscall_table
[SYS_getmsg
] = "getmsg";
1419 #if defined (SYS_putmsg)
1420 syscall_table
[SYS_putmsg
] = "putmsg";
1422 #if defined (SYS_poll)
1423 syscall_table
[SYS_poll
] = "poll";
1425 #if defined (SYS_lstat)
1426 syscall_table
[SYS_lstat
] = "lstat";
1428 #if defined (SYS_symlink)
1429 syscall_table
[SYS_symlink
] = "symlink";
1431 #if defined (SYS_readlink)
1432 syscall_table
[SYS_readlink
] = "readlink";
1434 #if defined (SYS_setgroups)
1435 syscall_table
[SYS_setgroups
] = "setgroups";
1437 #if defined (SYS_getgroups)
1438 syscall_table
[SYS_getgroups
] = "getgroups";
1440 #if defined (SYS_fchmod)
1441 syscall_table
[SYS_fchmod
] = "fchmod";
1443 #if defined (SYS_fchown)
1444 syscall_table
[SYS_fchown
] = "fchown";
1446 #if defined (SYS_sigprocmask)
1447 syscall_table
[SYS_sigprocmask
] = "sigprocmask";
1449 #if defined (SYS_sigsuspend)
1450 syscall_table
[SYS_sigsuspend
] = "sigsuspend";
1452 #if defined (SYS_sigaltstack)
1453 syscall_table
[SYS_sigaltstack
] = "sigaltstack";
1455 #if defined (SYS_sigaction)
1456 syscall_table
[SYS_sigaction
] = "sigaction";
1458 #if defined (SYS_sigpending)
1459 syscall_table
[SYS_sigpending
] = "sigpending";
1461 #if defined (SYS_context)
1462 syscall_table
[SYS_context
] = "context";
1464 #if defined (SYS_evsys)
1465 syscall_table
[SYS_evsys
] = "evsys";
1467 #if defined (SYS_evtrapret)
1468 syscall_table
[SYS_evtrapret
] = "evtrapret";
1470 #if defined (SYS_statvfs)
1471 syscall_table
[SYS_statvfs
] = "statvfs";
1473 #if defined (SYS_fstatvfs)
1474 syscall_table
[SYS_fstatvfs
] = "fstatvfs";
1476 #if defined (SYS_nfssys)
1477 syscall_table
[SYS_nfssys
] = "nfssys";
1479 #if defined (SYS_waitsys)
1480 syscall_table
[SYS_waitsys
] = "waitsys";
1482 #if defined (SYS_sigsendsys)
1483 syscall_table
[SYS_sigsendsys
] = "sigsendsys";
1485 #if defined (SYS_hrtsys)
1486 syscall_table
[SYS_hrtsys
] = "hrtsys";
1488 #if defined (SYS_acancel)
1489 syscall_table
[SYS_acancel
] = "acancel";
1491 #if defined (SYS_async)
1492 syscall_table
[SYS_async
] = "async";
1494 #if defined (SYS_priocntlsys)
1495 syscall_table
[SYS_priocntlsys
] = "priocntlsys";
1497 #if defined (SYS_pathconf)
1498 syscall_table
[SYS_pathconf
] = "pathconf";
1500 #if defined (SYS_mincore)
1501 syscall_table
[SYS_mincore
] = "mincore";
1503 #if defined (SYS_mmap)
1504 syscall_table
[SYS_mmap
] = "mmap";
1506 #if defined (SYS_mprotect)
1507 syscall_table
[SYS_mprotect
] = "mprotect";
1509 #if defined (SYS_munmap)
1510 syscall_table
[SYS_munmap
] = "munmap";
1512 #if defined (SYS_fpathconf)
1513 syscall_table
[SYS_fpathconf
] = "fpathconf";
1515 #if defined (SYS_vfork)
1516 syscall_table
[SYS_vfork
] = "vfork";
1518 #if defined (SYS_fchdir)
1519 syscall_table
[SYS_fchdir
] = "fchdir";
1521 #if defined (SYS_readv)
1522 syscall_table
[SYS_readv
] = "readv";
1524 #if defined (SYS_writev)
1525 syscall_table
[SYS_writev
] = "writev";
1527 #if defined (SYS_xstat)
1528 syscall_table
[SYS_xstat
] = "xstat";
1530 #if defined (SYS_lxstat)
1531 syscall_table
[SYS_lxstat
] = "lxstat";
1533 #if defined (SYS_fxstat)
1534 syscall_table
[SYS_fxstat
] = "fxstat";
1536 #if defined (SYS_xmknod)
1537 syscall_table
[SYS_xmknod
] = "xmknod";
1539 #if defined (SYS_clocal)
1540 syscall_table
[SYS_clocal
] = "clocal";
1542 #if defined (SYS_setrlimit)
1543 syscall_table
[SYS_setrlimit
] = "setrlimit";
1545 #if defined (SYS_getrlimit)
1546 syscall_table
[SYS_getrlimit
] = "getrlimit";
1548 #if defined (SYS_lchown)
1549 syscall_table
[SYS_lchown
] = "lchown";
1551 #if defined (SYS_memcntl)
1552 syscall_table
[SYS_memcntl
] = "memcntl";
1554 #if defined (SYS_getpmsg)
1555 syscall_table
[SYS_getpmsg
] = "getpmsg";
1557 #if defined (SYS_putpmsg)
1558 syscall_table
[SYS_putpmsg
] = "putpmsg";
1560 #if defined (SYS_rename)
1561 syscall_table
[SYS_rename
] = "rename";
1563 #if defined (SYS_uname)
1564 syscall_table
[SYS_uname
] = "uname";
1566 #if defined (SYS_setegid)
1567 syscall_table
[SYS_setegid
] = "setegid";
1569 #if defined (SYS_sysconfig)
1570 syscall_table
[SYS_sysconfig
] = "sysconfig";
1572 #if defined (SYS_adjtime)
1573 syscall_table
[SYS_adjtime
] = "adjtime";
1575 #if defined (SYS_systeminfo)
1576 syscall_table
[SYS_systeminfo
] = "systeminfo";
1578 #if defined (SYS_seteuid)
1579 syscall_table
[SYS_seteuid
] = "seteuid";
1581 #if defined (SYS_sproc)
1582 syscall_table
[SYS_sproc
] = "sproc";
1584 #if defined (SYS_keyctl)
1585 syscall_table
[SYS_keyctl
] = "keyctl";
1587 #if defined (SYS_secsys)
1588 syscall_table
[SYS_secsys
] = "secsys";
1590 #if defined (SYS_filepriv)
1591 syscall_table
[SYS_filepriv
] = "filepriv";
1593 #if defined (SYS_procpriv)
1594 syscall_table
[SYS_procpriv
] = "procpriv";
1596 #if defined (SYS_devstat)
1597 syscall_table
[SYS_devstat
] = "devstat";
1599 #if defined (SYS_aclipc)
1600 syscall_table
[SYS_aclipc
] = "aclipc";
1602 #if defined (SYS_fdevstat)
1603 syscall_table
[SYS_fdevstat
] = "fdevstat";
1605 #if defined (SYS_flvlfile)
1606 syscall_table
[SYS_flvlfile
] = "flvlfile";
1608 #if defined (SYS_lvlfile)
1609 syscall_table
[SYS_lvlfile
] = "lvlfile";
1611 #if defined (SYS_lvlequal)
1612 syscall_table
[SYS_lvlequal
] = "lvlequal";
1614 #if defined (SYS_lvlproc)
1615 syscall_table
[SYS_lvlproc
] = "lvlproc";
1617 #if defined (SYS_lvlipc)
1618 syscall_table
[SYS_lvlipc
] = "lvlipc";
1620 #if defined (SYS_acl)
1621 syscall_table
[SYS_acl
] = "acl";
1623 #if defined (SYS_auditevt)
1624 syscall_table
[SYS_auditevt
] = "auditevt";
1626 #if defined (SYS_auditctl)
1627 syscall_table
[SYS_auditctl
] = "auditctl";
1629 #if defined (SYS_auditdmp)
1630 syscall_table
[SYS_auditdmp
] = "auditdmp";
1632 #if defined (SYS_auditlog)
1633 syscall_table
[SYS_auditlog
] = "auditlog";
1635 #if defined (SYS_auditbuf)
1636 syscall_table
[SYS_auditbuf
] = "auditbuf";
1638 #if defined (SYS_lvldom)
1639 syscall_table
[SYS_lvldom
] = "lvldom";
1641 #if defined (SYS_lvlvfs)
1642 syscall_table
[SYS_lvlvfs
] = "lvlvfs";
1644 #if defined (SYS_mkmld)
1645 syscall_table
[SYS_mkmld
] = "mkmld";
1647 #if defined (SYS_mldmode)
1648 syscall_table
[SYS_mldmode
] = "mldmode";
1650 #if defined (SYS_secadvise)
1651 syscall_table
[SYS_secadvise
] = "secadvise";
1653 #if defined (SYS_online)
1654 syscall_table
[SYS_online
] = "online";
1656 #if defined (SYS_setitimer)
1657 syscall_table
[SYS_setitimer
] = "setitimer";
1659 #if defined (SYS_getitimer)
1660 syscall_table
[SYS_getitimer
] = "getitimer";
1662 #if defined (SYS_gettimeofday)
1663 syscall_table
[SYS_gettimeofday
] = "gettimeofday";
1665 #if defined (SYS_settimeofday)
1666 syscall_table
[SYS_settimeofday
] = "settimeofday";
1668 #if defined (SYS_lwp_create)
1669 syscall_table
[SYS_lwp_create
] = "_lwp_create";
1671 #if defined (SYS_lwp_exit)
1672 syscall_table
[SYS_lwp_exit
] = "_lwp_exit";
1674 #if defined (SYS_lwp_wait)
1675 syscall_table
[SYS_lwp_wait
] = "_lwp_wait";
1677 #if defined (SYS_lwp_self)
1678 syscall_table
[SYS_lwp_self
] = "_lwp_self";
1680 #if defined (SYS_lwp_info)
1681 syscall_table
[SYS_lwp_info
] = "_lwp_info";
1683 #if defined (SYS_lwp_private)
1684 syscall_table
[SYS_lwp_private
] = "_lwp_private";
1686 #if defined (SYS_processor_bind)
1687 syscall_table
[SYS_processor_bind
] = "processor_bind";
1689 #if defined (SYS_processor_exbind)
1690 syscall_table
[SYS_processor_exbind
] = "processor_exbind";
1692 #if defined (SYS_prepblock)
1693 syscall_table
[SYS_prepblock
] = "prepblock";
1695 #if defined (SYS_block)
1696 syscall_table
[SYS_block
] = "block";
1698 #if defined (SYS_rdblock)
1699 syscall_table
[SYS_rdblock
] = "rdblock";
1701 #if defined (SYS_unblock)
1702 syscall_table
[SYS_unblock
] = "unblock";
1704 #if defined (SYS_cancelblock)
1705 syscall_table
[SYS_cancelblock
] = "cancelblock";
1707 #if defined (SYS_pread)
1708 syscall_table
[SYS_pread
] = "pread";
1710 #if defined (SYS_pwrite)
1711 syscall_table
[SYS_pwrite
] = "pwrite";
1713 #if defined (SYS_truncate)
1714 syscall_table
[SYS_truncate
] = "truncate";
1716 #if defined (SYS_ftruncate)
1717 syscall_table
[SYS_ftruncate
] = "ftruncate";
1719 #if defined (SYS_lwp_kill)
1720 syscall_table
[SYS_lwp_kill
] = "_lwp_kill";
1722 #if defined (SYS_sigwait)
1723 syscall_table
[SYS_sigwait
] = "sigwait";
1725 #if defined (SYS_fork1)
1726 syscall_table
[SYS_fork1
] = "fork1";
1728 #if defined (SYS_forkall)
1729 syscall_table
[SYS_forkall
] = "forkall";
1731 #if defined (SYS_modload)
1732 syscall_table
[SYS_modload
] = "modload";
1734 #if defined (SYS_moduload)
1735 syscall_table
[SYS_moduload
] = "moduload";
1737 #if defined (SYS_modpath)
1738 syscall_table
[SYS_modpath
] = "modpath";
1740 #if defined (SYS_modstat)
1741 syscall_table
[SYS_modstat
] = "modstat";
1743 #if defined (SYS_modadm)
1744 syscall_table
[SYS_modadm
] = "modadm";
1746 #if defined (SYS_getksym)
1747 syscall_table
[SYS_getksym
] = "getksym";
1749 #if defined (SYS_lwp_suspend)
1750 syscall_table
[SYS_lwp_suspend
] = "_lwp_suspend";
1752 #if defined (SYS_lwp_continue)
1753 syscall_table
[SYS_lwp_continue
] = "_lwp_continue";
1755 #if defined (SYS_priocntllst)
1756 syscall_table
[SYS_priocntllst
] = "priocntllst";
1758 #if defined (SYS_sleep)
1759 syscall_table
[SYS_sleep
] = "sleep";
1761 #if defined (SYS_lwp_sema_wait)
1762 syscall_table
[SYS_lwp_sema_wait
] = "_lwp_sema_wait";
1764 #if defined (SYS_lwp_sema_post)
1765 syscall_table
[SYS_lwp_sema_post
] = "_lwp_sema_post";
1767 #if defined (SYS_lwp_sema_trywait)
1768 syscall_table
[SYS_lwp_sema_trywait
] = "lwp_sema_trywait";
1770 #if defined(SYS_fstatvfs64)
1771 syscall_table
[SYS_fstatvfs64
] = "fstatvfs64";
1773 #if defined(SYS_statvfs64)
1774 syscall_table
[SYS_statvfs64
] = "statvfs64";
1776 #if defined(SYS_ftruncate64)
1777 syscall_table
[SYS_ftruncate64
] = "ftruncate64";
1779 #if defined(SYS_truncate64)
1780 syscall_table
[SYS_truncate64
] = "truncate64";
1782 #if defined(SYS_getrlimit64)
1783 syscall_table
[SYS_getrlimit64
] = "getrlimit64";
1785 #if defined(SYS_setrlimit64)
1786 syscall_table
[SYS_setrlimit64
] = "setrlimit64";
1788 #if defined(SYS_lseek64)
1789 syscall_table
[SYS_lseek64
] = "lseek64";
1791 #if defined(SYS_mmap64)
1792 syscall_table
[SYS_mmap64
] = "mmap64";
1794 #if defined(SYS_pread64)
1795 syscall_table
[SYS_pread64
] = "pread64";
1797 #if defined(SYS_creat64)
1798 syscall_table
[SYS_creat64
] = "creat64";
1800 #if defined(SYS_dshmsys)
1801 syscall_table
[SYS_dshmsys
] = "dshmsys";
1803 #if defined(SYS_invlpg)
1804 syscall_table
[SYS_invlpg
] = "invlpg";
1806 #if defined(SYS_cg_ids)
1807 syscall_table
[SYS_cg_ids
] = "cg_ids";
1809 #if defined(SYS_cg_processors)
1810 syscall_table
[SYS_cg_processors
] = "cg_processors";
1812 #if defined(SYS_cg_info)
1813 syscall_table
[SYS_cg_info
] = "cg_info";
1815 #if defined(SYS_cg_bind)
1816 syscall_table
[SYS_cg_bind
] = "cg_bind";
1818 #if defined(SYS_cg_current)
1819 syscall_table
[SYS_cg_current
] = "cg_current";
1821 #if defined(SYS_cg_memloc)
1822 syscall_table
[SYS_cg_memloc
] = "cg_memloc";
1830 procfs_kill_inferior - kill any currently inferior
1834 void procfs_kill_inferior (void)
1838 Kill any current inferior.
1842 Kills even attached inferiors. Presumably the user has already
1843 been prompted that the inferior is an attached one rather than
1844 one started by gdb. (FIXME?)
1849 procfs_kill_inferior ()
1851 target_mourn_inferior ();
1858 unconditionally_kill_inferior - terminate the inferior
1862 static void unconditionally_kill_inferior (struct procinfo *)
1866 Kill the specified inferior.
1870 A possibly useful enhancement would be to first try sending
1871 the inferior a terminate signal, politely asking it to commit
1872 suicide, before we murder it (we could call that
1873 politely_kill_inferior()).
1878 unconditionally_kill_inferior (pi
)
1879 struct procinfo
*pi
;
1882 struct proc_ctl pctl
;
1884 ppid
= pi
->prstatus
.pr_ppid
;
1886 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
1887 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1888 before the PIOCKILL, otherwise it might generate a corrupted core
1889 file for the inferior. */
1890 ioctl (pi
->ctl_fd
, PIOCSSIG
, NULL
);
1892 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1893 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1894 to kill the inferior, otherwise it might remain stopped with a
1896 We do not check the result of the PIOCSSIG, the inferior might have
1899 struct siginfo newsiginfo
;
1901 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
1902 newsiginfo
.si_signo
= SIGKILL
;
1903 newsiginfo
.si_code
= 0;
1904 newsiginfo
.si_errno
= 0;
1905 newsiginfo
.si_pid
= getpid ();
1906 newsiginfo
.si_uid
= getuid ();
1907 ioctl (pi
->ctl_fd
, PIOCSSIG
, &newsiginfo
);
1909 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1910 procfs_write_pckill (pi
);
1911 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1913 close_proc_file (pi
);
1915 /* Only wait() for our direct children. Our grandchildren zombies are killed
1916 by the death of their parents. */
1918 if (ppid
== getpid())
1926 procfs_xfer_memory -- copy data to or from inferior memory space
1930 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1931 int dowrite, struct target_ops target)
1935 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1936 from/to debugger memory starting at MYADDR. Copy from inferior
1937 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1939 Returns the length copied, which is either the LEN argument or
1940 zero. This xfer function does not do partial moves, since procfs_ops
1941 doesn't allow memory operations to cross below us in the target stack
1946 The /proc interface makes this an almost trivial task.
1950 procfs_xfer_memory (memaddr
, myaddr
, len
, dowrite
, target
)
1955 struct target_ops
*target
; /* ignored */
1958 struct procinfo
*pi
;
1960 pi
= current_procinfo
;
1962 if (lseek(pi
->as_fd
, (off_t
) memaddr
, SEEK_SET
) == (off_t
) memaddr
)
1966 nbytes
= write (pi
->as_fd
, myaddr
, len
);
1970 nbytes
= read (pi
->as_fd
, myaddr
, len
);
1984 procfs_store_registers -- copy register values back to inferior
1988 void procfs_store_registers (int regno)
1992 Store our current register values back into the inferior. If
1993 REGNO is -1 then store all the register, otherwise store just
1994 the value specified by REGNO.
1998 If we are storing only a single register, we first have to get all
1999 the current values from the process, overwrite the desired register
2000 in the gregset with the one we want from gdb's registers, and then
2001 send the whole set back to the process. For writing all the
2002 registers, all we have to do is generate the gregset and send it to
2005 Also note that the process has to be stopped on an event of interest
2006 for this to work, which basically means that it has to have been
2007 run under the control of one of the other /proc ioctl calls and not
2008 ptrace. Since we don't use ptrace anyway, we don't worry about this
2009 fine point, but it is worth noting for future reference.
2011 Gdb is confused about what this function is supposed to return.
2012 Some versions return a value, others return nothing. Some are
2013 declared to return a value and actually return nothing. Gdb ignores
2014 anything returned. (FIXME)
2019 procfs_store_registers (regno
)
2022 struct procinfo
*pi
;
2023 #ifdef PROCFS_USE_READ_WRITE
2024 struct greg_ctl greg
;
2025 struct fpreg_ctl fpreg
;
2028 pi
= current_procinfo
;
2030 #ifdef PROCFS_USE_READ_WRITE
2033 procfs_read_status (pi
);
2034 memcpy ((char *) &greg
.gregset
,
2035 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
,
2036 sizeof (gdb_gregset_t
));
2038 fill_gregset (&greg
.gregset
, regno
);
2040 write (pi
->ctl_fd
, &greg
, sizeof (greg
));
2041 #else /* PROCFS_USE_READ_WRITE */
2044 ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
);
2046 fill_gregset (&pi
->gregset
.gregset
, regno
);
2047 ioctl (pi
->ctl_fd
, PIOCSREG
, &pi
->gregset
.gregset
);
2048 #endif /* PROCFS_USE_READ_WRITE */
2050 #if defined (FP0_REGNUM)
2052 /* Now repeat everything using the floating point register set, if the
2053 target has floating point hardware. Since we ignore the returned value,
2054 we'll never know whether it worked or not anyway. */
2056 #ifdef PROCFS_USE_READ_WRITE
2059 procfs_read_status (pi
);
2060 memcpy ((char *) &fpreg
.fpregset
,
2061 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
,
2062 sizeof (gdb_fpregset_t
));
2064 fill_fpregset (&fpreg
.fpregset
, regno
);
2065 fpreg
.cmd
= PCSFPREG
;
2066 write (pi
->ctl_fd
, &fpreg
, sizeof (fpreg
));
2067 #else /* PROCFS_USE_READ_WRITE */
2070 ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
);
2072 fill_fpregset (&pi
->fpregset
.fpregset
, regno
);
2073 ioctl (pi
->ctl_fd
, PIOCSFPREG
, &pi
->fpregset
.fpregset
);
2074 #endif /* PROCFS_USE_READ_WRITE */
2076 #endif /* FP0_REGNUM */
2084 init_procinfo - setup a procinfo struct and connect it to a process
2088 struct procinfo * init_procinfo (int pid)
2092 Allocate a procinfo structure, open the /proc file and then set up the
2093 set of signals and faults that are to be traced. Returns a pointer to
2094 the new procinfo structure.
2098 If proc_init_failed ever gets called, control returns to the command
2099 processing loop via the standard error handling code.
2103 static struct procinfo
*
2104 init_procinfo (pid
, kill
)
2108 struct procinfo
*pi
= (struct procinfo
*)
2109 xmalloc (sizeof (struct procinfo
));
2110 struct sig_ctl sctl
;
2111 struct flt_ctl fctl
;
2113 memset ((char *) pi
, 0, sizeof (*pi
));
2114 if (!open_proc_file (pid
, pi
, O_RDWR
, 1))
2115 proc_init_failed (pi
, "can't open process file", kill
);
2117 /* open_proc_file may modify pid. */
2121 /* Add new process to process info list */
2123 pi
->next
= procinfo_list
;
2126 add_fd (pi
); /* Add to list for poll/select */
2128 /* Remember some things about the inferior that we will, or might, change
2129 so that we can restore them when we detach. */
2131 memcpy ((char *) &pi
->saved_trace
.sigset
,
2132 (char *) &pi
->prstatus
.pr_sigtrace
, sizeof (sigset_t
));
2133 memcpy ((char *) &pi
->saved_fltset
.fltset
,
2134 (char *) &pi
->prstatus
.pr_flttrace
, sizeof (fltset_t
));
2135 memcpy ((char *) &pi
->saved_entryset
.sysset
,
2136 (char *) &pi
->prstatus
.pr_sysentry
, sizeof (sysset_t
));
2137 memcpy ((char *) &pi
->saved_exitset
.sysset
,
2138 (char *) &pi
->prstatus
.pr_sysexit
, sizeof (sysset_t
));
2140 /* Set up trace and fault sets, as gdb expects them. */
2142 prfillset (&sctl
.sigset
);
2143 notice_signals (pi
, &sctl
);
2144 prfillset (&fctl
.fltset
);
2145 prdelset (&fctl
.fltset
, FLTPAGE
);
2147 #else /* ! UNIXWARE */
2148 ioctl (pi
->ctl_fd
, PIOCGTRACE
, &pi
->saved_trace
.sigset
);
2149 ioctl (pi
->ctl_fd
, PIOCGHOLD
, &pi
->saved_sighold
.sigset
);
2150 ioctl (pi
->ctl_fd
, PIOCGFAULT
, &pi
->saved_fltset
.fltset
);
2151 ioctl (pi
->ctl_fd
, PIOCGENTRY
, &pi
->saved_entryset
.sysset
);
2152 ioctl (pi
->ctl_fd
, PIOCGEXIT
, &pi
->saved_exitset
.sysset
);
2154 /* Set up trace and fault sets, as gdb expects them. */
2156 memset ((char *) &pi
->prrun
, 0, sizeof (pi
->prrun
));
2157 prfillset (&pi
->prrun
.pr_trace
);
2158 procfs_notice_signals (pid
);
2159 prfillset (&pi
->prrun
.pr_fault
);
2160 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
2161 #ifdef PROCFS_DONT_TRACE_FAULTS
2162 premptyset (&pi
->prrun
.pr_fault
);
2164 #endif /* UNIXWARE */
2166 if (!procfs_read_status (pi
))
2167 proc_init_failed (pi
, "procfs_read_status failed", kill
);
2176 create_procinfo - initialize access to a /proc entry
2180 struct procinfo * create_procinfo (int pid)
2184 Allocate a procinfo structure, open the /proc file and then set up the
2185 set of signals and faults that are to be traced. Returns a pointer to
2186 the new procinfo structure.
2190 If proc_init_failed ever gets called, control returns to the command
2191 processing loop via the standard error handling code.
2195 static struct procinfo
*
2196 create_procinfo (pid
)
2199 struct procinfo
*pi
;
2200 struct sig_ctl sctl
;
2201 struct flt_ctl fctl
;
2203 pi
= find_procinfo (pid
, 1);
2205 return pi
; /* All done! It already exists */
2207 pi
= init_procinfo (pid
, 1);
2210 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2211 already stopped, even if they all have PR_ASYNC set. */
2212 if (!(pi
->prstatus
.pr_flags
& PR_STOPPED
))
2214 if (!procfs_write_pcwstop (pi
))
2215 proc_init_failed (pi
, "procfs_write_pcwstop failed", 1);
2217 #ifdef PROCFS_USE_READ_WRITE
2218 fctl
.cmd
= PCSFAULT
;
2219 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
2220 proc_init_failed (pi
, "PCSFAULT failed", 1);
2222 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
) < 0)
2223 proc_init_failed (pi
, "PIOCSFAULT failed", 1);
2233 procfs_exit_handler - handle entry into the _exit syscall
2237 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2241 This routine is called when an inferior process enters the _exit()
2242 system call. It continues the process, and then collects the exit
2243 status and pid which are returned in *statvalp and *rtnvalp. After
2244 that it returns non-zero to indicate that procfs_wait should wake up.
2247 There is probably a better way to do this.
2252 procfs_exit_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2253 struct procinfo
*pi
;
2259 struct procinfo
*temp_pi
, *next_pi
;
2260 struct proc_ctl pctl
;
2264 pctl
.data
= PRCFAULT
;
2266 pi
->prrun
.pr_flags
= PRCFAULT
;
2269 #ifdef PROCFS_USE_READ_WRITE
2270 if (write (pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
2272 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2274 perror_with_name (pi
->pathname
);
2278 /* Claim it exited (don't call wait). */
2280 printf_filtered ("(attached process has exited)\n");
2282 *rtnvalp
= inferior_pid
;
2286 *rtnvalp
= wait (statvalp
);
2291 /* Close ALL open proc file handles,
2292 except the one that called SYS_exit. */
2293 for (temp_pi
= procinfo_list
; temp_pi
; temp_pi
= next_pi
)
2295 next_pi
= temp_pi
->next
;
2297 continue; /* Handled below */
2298 close_proc_file (temp_pi
);
2307 procfs_exec_handler - handle exit from the exec family of syscalls
2311 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2315 This routine is called when an inferior process is about to finish any
2316 of the exec() family of system calls. It pretends that we got a
2317 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2318 to tell procfs_wait to wake up.
2321 This need for compatibility with ptrace is questionable. In the
2322 future, it shouldn't be necessary.
2327 procfs_exec_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2328 struct procinfo
*pi
;
2334 *statvalp
= (SIGTRAP
<< 8) | 0177;
2339 #if defined(SYS_sproc) && !defined(UNIXWARE)
2340 /* IRIX lwp creation system call */
2346 procfs_sproc_handler - handle exit from the sproc syscall
2350 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2354 This routine is called when an inferior process is about to finish an
2355 sproc() system call. This is the system call that IRIX uses to create
2356 a lightweight process. When the target process gets this event, we can
2357 look at rval1 to find the new child processes ID, and create a new
2358 procinfo struct from that.
2360 After that, it pretends that we got a SIGTRAP, and returns non-zero
2361 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2362 woken up, sees the new process and continues it.
2365 We actually never see the child exiting from sproc because we will
2366 shortly stop the child with PIOCSTOP, which is then registered as the
2371 procfs_sproc_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2372 struct procinfo
*pi
;
2378 /* We've just detected the completion of an sproc system call. Now we need to
2379 setup a procinfo struct for this thread, and notify the thread system of the
2382 /* If sproc failed, then nothing interesting happened. Continue the process
2383 and go back to sleep. */
2385 if (pi
->prstatus
.pr_errno
!= 0)
2387 pi
->prrun
.pr_flags
&= PRSTEP
;
2388 pi
->prrun
.pr_flags
|= PRCFAULT
;
2390 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2391 perror_with_name (pi
->pathname
);
2396 /* At this point, the new thread is stopped at it's first instruction, and
2397 the parent is stopped at the exit from sproc. */
2399 /* Notify the caller of the arrival of a new thread. */
2400 create_procinfo (pi
->prstatus
.pr_rval1
);
2402 *rtnvalp
= pi
->prstatus
.pr_rval1
;
2403 *statvalp
= (SIGTRAP
<< 8) | 0177;
2412 procfs_fork_handler - handle exit from the fork syscall
2416 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2420 This routine is called when an inferior process is about to finish a
2421 fork() system call. We will open up the new process, and then close
2422 it, which releases it from the clutches of the debugger.
2424 After that, we continue the target process as though nothing had
2428 This is necessary for IRIX because we have to set PR_FORK in order
2429 to catch the creation of lwps (via sproc()). When an actual fork
2430 occurs, it becomes necessary to reset the forks debugger flags and
2431 continue it because we can't hack multiple processes yet.
2435 procfs_fork_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2436 struct procinfo
*pi
;
2442 struct procinfo
*pitemp
;
2444 /* At this point, we've detected the completion of a fork (or vfork) call in
2445 our child. The grandchild is also stopped because we set inherit-on-fork
2446 earlier. (Note that nobody has the grandchilds' /proc file open at this
2447 point.) We will release the grandchild from the debugger by opening it's
2448 /proc file and then closing it. Since run-on-last-close is set, the
2449 grandchild continues on its' merry way. */
2452 pitemp
= create_procinfo (pi
->prstatus
.pr_rval1
);
2454 close_proc_file (pitemp
);
2456 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2457 perror_with_name (pi
->pathname
);
2461 #endif /* SYS_sproc && !UNIXWARE */
2467 procfs_set_inferior_syscall_traps - setup the syscall traps
2471 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2475 Called for each "procinfo" (process, thread, or LWP) in the
2476 inferior, to register for notification of and handlers for
2477 syscall traps in the inferior.
2482 procfs_set_inferior_syscall_traps (pip
)
2483 struct procinfo
*pip
;
2485 procfs_set_syscall_trap (pip
, SYS_exit
, PROCFS_SYSCALL_ENTRY
,
2486 procfs_exit_handler
);
2488 #ifndef PRFS_STOPEXEC
2490 procfs_set_syscall_trap (pip
, SYS_exec
, PROCFS_SYSCALL_EXIT
,
2491 procfs_exec_handler
);
2494 procfs_set_syscall_trap (pip
, SYS_execv
, PROCFS_SYSCALL_EXIT
,
2495 procfs_exec_handler
);
2498 procfs_set_syscall_trap (pip
, SYS_execve
, PROCFS_SYSCALL_EXIT
,
2499 procfs_exec_handler
);
2501 #endif /* PRFS_STOPEXEC */
2503 /* Setup traps on exit from sproc() */
2506 procfs_set_syscall_trap (pip
, SYS_sproc
, PROCFS_SYSCALL_EXIT
,
2507 procfs_sproc_handler
);
2508 procfs_set_syscall_trap (pip
, SYS_fork
, PROCFS_SYSCALL_EXIT
,
2509 procfs_fork_handler
);
2511 procfs_set_syscall_trap (pip
, SYS_vfork
, PROCFS_SYSCALL_EXIT
,
2512 procfs_fork_handler
);
2514 /* Turn on inherit-on-fork flag so that all children of the target process
2515 start with tracing flags set. This allows us to trap lwp creation. Note
2516 that we also have to trap on fork and vfork in order to disable all tracing
2517 in the targets child processes. */
2519 modify_inherit_on_fork_flag (pip
->ctl_fd
, 1);
2522 #ifdef SYS_lwp_create
2523 procfs_set_syscall_trap (pip
, SYS_lwp_create
, PROCFS_SYSCALL_EXIT
,
2524 procfs_lwp_creation_handler
);
2532 procfs_init_inferior - initialize target vector and access to a
2537 void procfs_init_inferior (int pid)
2541 When gdb starts an inferior, this function is called in the parent
2542 process immediately after the fork. It waits for the child to stop
2543 on the return from the exec system call (the child itself takes care
2544 of ensuring that this is set up), then sets up the set of signals
2545 and faults that are to be traced. Returns the pid, which may have had
2546 the thread-id added to it.
2550 If proc_init_failed ever gets called, control returns to the command
2551 processing loop via the standard error handling code.
2556 procfs_init_inferior (pid
)
2559 struct procinfo
*pip
;
2561 push_target (&procfs_ops
);
2563 pip
= create_procinfo (pid
);
2565 procfs_set_inferior_syscall_traps (pip
);
2567 /* create_procinfo may change the pid, so we have to update inferior_pid
2568 here before calling other gdb routines that need the right pid. */
2573 add_thread (pip
-> pid
); /* Setup initial thread */
2575 #ifdef START_INFERIOR_TRAPS_EXPECTED
2576 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
2578 /* One trap to exec the shell, one to exec the program being debugged. */
2579 startup_inferior (2);
2587 procfs_notice_signals
2591 static void procfs_notice_signals (int pid);
2595 When the user changes the state of gdb's signal handling via the
2596 "handle" command, this function gets called to see if any change
2597 in the /proc interface is required. It is also called internally
2598 by other /proc interface functions to initialize the state of
2599 the traced signal set.
2601 One thing it does is that signals for which the state is "nostop",
2602 "noprint", and "pass", have their trace bits reset in the pr_trace
2603 field, so that they are no longer traced. This allows them to be
2604 delivered directly to the inferior without the debugger ever being
2609 procfs_notice_signals (pid
)
2612 struct procinfo
*pi
;
2613 struct sig_ctl sctl
;
2615 pi
= find_procinfo (pid
, 0);
2617 #ifndef HAVE_PRRUN_T
2618 premptyset (&sctl
.sigset
);
2620 sctl
.sigset
= pi
->prrun
.pr_trace
;
2623 notice_signals (pi
, &sctl
);
2626 pi
->prrun
.pr_trace
= sctl
.sigset
;
2631 notice_signals (pi
, sctl
)
2632 struct procinfo
*pi
;
2633 struct sig_ctl
*sctl
;
2637 for (signo
= 0; signo
< NSIG
; signo
++)
2639 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
2640 signal_print_state (target_signal_from_host (signo
)) == 0 &&
2641 signal_pass_state (target_signal_from_host (signo
)) == 1)
2643 prdelset (&sctl
->sigset
, signo
);
2647 praddset (&sctl
->sigset
, signo
);
2650 #ifdef PROCFS_USE_READ_WRITE
2651 sctl
->cmd
= PCSTRACE
;
2652 if (write (pi
->ctl_fd
, (char *) sctl
, sizeof (struct sig_ctl
)) < 0)
2654 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &sctl
->sigset
))
2657 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2665 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2669 void proc_set_exec_trap (void)
2673 This function is called in the child process when starting up
2674 an inferior, prior to doing the exec of the actual inferior.
2675 It sets the child process's exitset to make exit from the exec
2676 system call an event of interest to stop on, and then simply
2677 returns. The child does the exec, the system call returns, and
2678 the child stops at the first instruction, ready for the gdb
2679 parent process to take control of it.
2683 We need to use all local variables since the child may be sharing
2684 it's data space with the parent, if vfork was used rather than
2687 Also note that we want to turn off the inherit-on-fork flag in
2688 the child process so that any grand-children start with all
2689 tracing flags cleared.
2693 proc_set_exec_trap ()
2695 struct sys_ctl exitset
;
2696 struct sys_ctl entryset
;
2697 char procname
[MAX_PROC_NAME_SIZE
];
2700 sprintf (procname
, CTL_PROC_NAME_FMT
, getpid ());
2702 if ((fd
= open (procname
, O_WRONLY
)) < 0)
2704 if ((fd
= open (procname
, O_RDWR
)) < 0)
2708 gdb_flush (gdb_stderr
);
2711 premptyset (&exitset
.sysset
);
2712 premptyset (&entryset
.sysset
);
2714 #ifdef PRFS_STOPEXEC
2715 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2716 exits from exec system calls because of the user level loader. */
2720 if (ioctl (fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
2723 gdb_flush (gdb_stderr
);
2726 prfs_flags
|= PRFS_STOPEXEC
;
2727 if (ioctl (fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
2730 gdb_flush (gdb_stderr
);
2734 #else /* PRFS_STOPEXEC */
2736 Not all systems with /proc have all the exec* syscalls with the same
2737 names. On the SGI, for example, there is no SYS_exec, but there
2738 *is* a SYS_execv. So, we try to account for that. */
2741 praddset (&exitset
.sysset
, SYS_exec
);
2744 praddset (&exitset
.sysset
, SYS_execve
);
2747 praddset (&exitset
.sysset
, SYS_execv
);
2750 #ifdef PROCFS_USE_READ_WRITE
2751 exitset
.cmd
= PCSEXIT
;
2752 if (write (fd
, (char *) &exitset
, sizeof (struct sys_ctl
)) < 0)
2754 if (ioctl (fd
, PIOCSEXIT
, &exitset
.sysset
) < 0)
2758 gdb_flush (gdb_stderr
);
2761 #endif /* PRFS_STOPEXEC */
2763 praddset (&entryset
.sysset
, SYS_exit
);
2765 #ifdef PROCFS_USE_READ_WRITE
2766 entryset
.cmd
= PCSENTRY
;
2767 if (write (fd
, (char *) &entryset
, sizeof (struct sys_ctl
)) < 0)
2769 if (ioctl (fd
, PIOCSENTRY
, &entryset
.sysset
) < 0)
2773 gdb_flush (gdb_stderr
);
2777 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2778 start with tracing flags cleared. */
2780 modify_inherit_on_fork_flag (fd
, 0);
2782 /* Turn on run-on-last-close flag so that this process will not hang
2783 if GDB goes away for some reason. */
2785 modify_run_on_last_close_flag (fd
, 1);
2787 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2788 /* NOTE: revisit when doing thread support for UW */
2792 struct proc_ctl pctl
;
2794 /* Solaris needs this to make procfs treat all threads seperately. Without
2795 this, all threads halt whenever something happens to any thread. Since
2796 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2798 pr_flags
= PR_ASYNC
;
2799 #ifdef PROCFS_USE_READ_WRITE
2801 pctl
.data
= PR_FORK
|PR_ASYNC
;
2802 write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
));
2804 ioctl (fd
, PIOCSET
, &pr_flags
);
2807 #endif /* PR_ASYNC */
2808 #endif /* !UNIXWARE */
2815 proc_iterate_over_mappings -- call function for every mapped space
2819 int proc_iterate_over_mappings (int (*func)())
2823 Given a pointer to a function, call that function for every
2824 mapped address space, passing it an open file descriptor for
2825 the file corresponding to that mapped address space (if any)
2826 and the base address of the mapped space. Quit when we hit
2827 the end of the mappings or the function returns nonzero.
2832 proc_iterate_over_mappings (func
)
2833 int (*func
) PARAMS ((int, CORE_ADDR
));
2840 struct procinfo
*pi
;
2843 pi
= current_procinfo
;
2845 if (fstat (pi
->map_fd
, &sbuf
) < 0)
2848 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
2849 prmaps
= (prmap_t
*) alloca (nmap
* sizeof(prmap_t
));
2850 if ((lseek (pi
->map_fd
, 0, SEEK_SET
) == 0) &&
2851 (read (pi
->map_fd
, (char *) prmaps
, nmap
* sizeof (prmap_t
)) ==
2852 (nmap
* sizeof (prmap_t
))))
2855 for (prmap
= prmaps
; i
< nmap
&& funcstat
== 0; ++prmap
, ++i
)
2857 char name
[sizeof ("/proc/1234567890/object") +
2858 sizeof (prmap
->pr_mapname
)];
2859 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, prmap
->pr_mapname
);
2860 if ((fd
= open (name
, O_RDONLY
)) == -1)
2865 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
->pr_vaddr
);
2871 #else /* UNIXWARE */
2873 proc_iterate_over_mappings (func
)
2874 int (*func
) PARAMS ((int, CORE_ADDR
));
2879 struct prmap
*prmaps
;
2880 struct prmap
*prmap
;
2881 struct procinfo
*pi
;
2883 pi
= current_procinfo
;
2885 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2887 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2888 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2890 for (prmap
= prmaps
; prmap
-> pr_size
&& funcstat
== 0; ++prmap
)
2892 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
-> pr_vaddr
, 0);
2893 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
-> pr_vaddr
);
2900 #endif /* UNIXWARE */
2902 #if 0 /* Currently unused */
2907 proc_base_address -- find base address for segment containing address
2911 CORE_ADDR proc_base_address (CORE_ADDR addr)
2915 Given an address of a location in the inferior, find and return
2916 the base address of the mapped segment containing that address.
2918 This is used for example, by the shared library support code,
2919 where we have the pc value for some location in the shared library
2920 where we are stopped, and need to know the base address of the
2921 segment containing that address.
2925 proc_base_address (addr
)
2929 struct prmap
*prmaps
;
2930 struct prmap
*prmap
;
2931 CORE_ADDR baseaddr
= 0;
2932 struct procinfo
*pi
;
2934 pi
= current_procinfo
;
2936 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2938 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2939 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2941 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
2943 if ((prmap
-> pr_vaddr
<= (caddr_t
) addr
) &&
2944 (prmap
-> pr_vaddr
+ prmap
-> pr_size
> (caddr_t
) addr
))
2946 baseaddr
= (CORE_ADDR
) prmap
-> pr_vaddr
;
2962 proc_address_to_fd -- return open fd for file mapped to address
2966 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2970 Given an address in the current inferior's address space, use the
2971 /proc interface to find an open file descriptor for the file that
2972 this address was mapped in from. Return -1 if there is no current
2973 inferior. Print a warning message if there is an inferior but
2974 the address corresponds to no file (IE a bogus address).
2979 proc_address_to_fd (pi
, addr
, complain
)
2980 struct procinfo
*pi
;
2986 if ((fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, (caddr_t
*) &addr
)) < 0)
2990 print_sys_errmsg (pi
->pathname
, errno
);
2991 warning ("can't find mapped file for address 0x%x", addr
);
2996 #endif /* !UNIXWARE */
2998 /* Attach to process PID, then initialize for debugging it
2999 and wait for the trace-trap that results from attaching. */
3002 procfs_attach (args
, from_tty
)
3010 error_no_arg ("process-id to attach");
3014 if (pid
== getpid()) /* Trying to masturbate? */
3015 error ("I refuse to debug myself!");
3019 exec_file
= (char *) get_exec_file (0);
3022 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
3024 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid
));
3026 gdb_flush (gdb_stdout
);
3029 inferior_pid
= pid
= do_attach (pid
);
3030 push_target (&procfs_ops
);
3034 /* Take a program previously attached to and detaches it.
3035 The program resumes execution and will no longer stop
3036 on signals, etc. We'd better not have left any breakpoints
3037 in the program or it'll die when it hits one. For this
3038 to work, it may be necessary for the process to have been
3039 previously attached. It *might* work if the program was
3040 started via the normal ptrace (PTRACE_TRACEME). */
3043 procfs_detach (args
, from_tty
)
3051 char *exec_file
= get_exec_file (0);
3054 printf_unfiltered ("Detaching from program: %s %s\n",
3055 exec_file
, target_pid_to_str (inferior_pid
));
3056 gdb_flush (gdb_stdout
);
3059 siggnal
= atoi (args
);
3061 do_detach (siggnal
);
3063 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
3066 /* Get ready to modify the registers array. On machines which store
3067 individual registers, this doesn't need to do anything. On machines
3068 which store all the registers in one fell swoop, this makes sure
3069 that registers contains all the registers from the program being
3073 procfs_prepare_to_store ()
3075 #ifdef CHILD_PREPARE_TO_STORE
3076 CHILD_PREPARE_TO_STORE ();
3080 /* Print status information about what we're accessing. */
3083 procfs_files_info (ignore
)
3084 struct target_ops
*ignore
;
3086 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3087 attach_flag
? "attached": "child", target_pid_to_str (inferior_pid
));
3092 procfs_open (arg
, from_tty
)
3096 error ("Use the \"run\" command to start a Unix child process.");
3103 do_attach -- attach to an already existing process
3107 int do_attach (int pid)
3111 Attach to an already existing process with the specified process
3112 id. If the process is not already stopped, query whether to
3117 The option of stopping at attach time is specific to the /proc
3118 versions of gdb. Versions using ptrace force the attachee
3119 to stop. (I have changed this version to do so, too. All you
3120 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3128 struct procinfo
*pi
;
3129 struct sig_ctl sctl
;
3130 struct flt_ctl fctl
;
3133 pi
= init_procinfo (pid
, 0);
3136 nlwp
= pi
->prstatus
.pr_nlwp
;
3137 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (id_t
));
3139 if (ioctl (pi
->ctl_fd
, PIOCLWPIDS
, lwps
))
3141 print_sys_errmsg (pi
-> pathname
, errno
);
3142 error ("PIOCLWPIDS failed");
3144 #else /* PIOCLWPIDS */
3146 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
3149 for (; nlwp
> 0; nlwp
--, lwps
++)
3151 /* First one has already been created above. */
3152 if ((pi
= find_procinfo ((*lwps
<< 16) | pid
, 1)) == 0)
3153 pi
= init_procinfo ((*lwps
<< 16) | pid
, 0);
3155 if (THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3157 pi
->was_stopped
= 1;
3161 pi
->was_stopped
= 0;
3162 if (1 || query ("Process is currently running, stop it? "))
3165 /* Make it run again when we close it. */
3166 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3167 #ifdef PROCFS_USE_READ_WRITE
3169 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3171 if (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
3174 print_sys_errmsg (pi
->pathname
, errno
);
3175 close_proc_file (pi
);
3176 error ("PIOCSTOP failed");
3179 if (!procfs_read_status (pi
))
3181 print_sys_errmsg (pi
->pathname
, errno
);
3182 close_proc_file (pi
);
3183 error ("procfs_read_status failed");
3186 pi
->nopass_next_sigstop
= 1;
3190 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3191 target_pid_to_str (pi
->pid
));
3195 #ifdef PROCFS_USE_READ_WRITE
3196 fctl
.cmd
= PCSFAULT
;
3197 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
3198 print_sys_errmsg ("PCSFAULT failed", errno
);
3199 #else /* PROCFS_USE_READ_WRITE */
3200 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
3202 print_sys_errmsg ("PIOCSFAULT failed", errno
);
3204 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
3206 print_sys_errmsg ("PIOCSTRACE failed", errno
);
3208 add_thread (pi
->pid
);
3209 procfs_set_inferior_syscall_traps (pi
);
3210 #endif /* PROCFS_USE_READ_WRITE */
3220 do_detach -- detach from an attached-to process
3224 void do_detach (int signal)
3228 Detach from the current attachee.
3230 If signal is non-zero, the attachee is started running again and sent
3231 the specified signal.
3233 If signal is zero and the attachee was not already stopped when we
3234 attached to it, then we make it runnable again when we detach.
3236 Otherwise, we query whether or not to make the attachee runnable
3237 again, since we may simply want to leave it in the state it was in
3240 We report any problems, but do not consider them errors, since we
3241 MUST detach even if some things don't seem to go right. This may not
3242 be the ideal situation. (FIXME).
3249 struct procinfo
*pi
;
3251 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3255 set_proc_siginfo (pi
, signal
);
3257 #ifdef PROCFS_USE_READ_WRITE
3258 pi
->saved_exitset
.cmd
= PCSEXIT
;
3259 if (write (pi
->ctl_fd
, (char *) &pi
->saved_exitset
,
3260 sizeof (struct sys_ctl
)) < 0)
3262 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &pi
->saved_exitset
.sysset
) < 0)
3265 print_sys_errmsg (pi
->pathname
, errno
);
3266 printf_unfiltered ("PIOCSEXIT failed.\n");
3268 #ifdef PROCFS_USE_READ_WRITE
3269 pi
->saved_entryset
.cmd
= PCSENTRY
;
3270 if (write (pi
->ctl_fd
, (char *) &pi
->saved_entryset
,
3271 sizeof (struct sys_ctl
)) < 0)
3273 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &pi
->saved_entryset
.sysset
) < 0)
3276 print_sys_errmsg (pi
->pathname
, errno
);
3277 printf_unfiltered ("PIOCSENTRY failed.\n");
3279 #ifdef PROCFS_USE_READ_WRITE
3280 pi
->saved_trace
.cmd
= PCSTRACE
;
3281 if (write (pi
->ctl_fd
, (char *) &pi
->saved_trace
,
3282 sizeof (struct sig_ctl
)) < 0)
3284 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->saved_trace
.sigset
) < 0)
3287 print_sys_errmsg (pi
->pathname
, errno
);
3288 printf_unfiltered ("PIOCSTRACE failed.\n");
3291 if (ioctl (pi
->ctl_fd
, PIOCSHOLD
, &pi
->saved_sighold
.sigset
) < 0)
3293 print_sys_errmsg (pi
->pathname
, errno
);
3294 printf_unfiltered ("PIOSCHOLD failed.\n");
3297 #ifdef PROCFS_USE_READ_WRITE
3298 pi
->saved_fltset
.cmd
= PCSFAULT
;
3299 if (write (pi
->ctl_fd
, (char *) &pi
->saved_fltset
,
3300 sizeof (struct flt_ctl
)) < 0)
3302 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->saved_fltset
.fltset
) < 0)
3305 print_sys_errmsg (pi
->pathname
, errno
);
3306 printf_unfiltered ("PIOCSFAULT failed.\n");
3308 if (!procfs_read_status (pi
))
3310 print_sys_errmsg (pi
->pathname
, errno
);
3311 printf_unfiltered ("procfs_read_status failed.\n");
3316 || (THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3319 struct proc_ctl pctl
;
3321 if (signal
|| !pi
->was_stopped
||
3322 query ("Was stopped when attached, make it runnable again? "))
3324 /* Clear any pending signal if we want to detach without
3327 set_proc_siginfo (pi
, signal
);
3329 /* Clear any fault that might have stopped it. */
3330 #ifdef PROCFS_USE_READ_WRITE
3332 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3334 if (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0))
3337 print_sys_errmsg (pi
->pathname
, errno
);
3338 printf_unfiltered ("PIOCCFAULT failed.\n");
3341 /* Make it run again when we close it. */
3343 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3347 close_proc_file (pi
);
3352 /* emulate wait() as much as possible.
3353 Wait for child to do something. Return pid of child, or -1 in case
3354 of error; store status in *OURSTATUS.
3356 Not sure why we can't
3357 just use wait(), but it seems to have problems when applied to a
3358 process being controlled with the /proc interface.
3360 We have a race problem here with no obvious solution. We need to let
3361 the inferior run until it stops on an event of interest, which means
3362 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3363 ioctl if the process is already stopped on something that is not an
3364 event of interest, or the call will hang indefinitely. Thus we first
3365 use PIOCSTATUS to see if the process is not stopped. If not, then we
3366 use PIOCWSTOP. But during the window between the two, if the process
3367 stops for any reason that is not an event of interest (such as a job
3368 control signal) then gdb will hang. One possible workaround is to set
3369 an alarm to wake up every minute of so and check to see if the process
3370 is still running, and if so, then reissue the PIOCWSTOP. But this is
3371 a real kludge, so has not been implemented. FIXME: investigate
3374 FIXME: Investigate why wait() seems to have problems with programs
3375 being control by /proc routines. */
3377 procfs_wait (pid
, ourstatus
)
3379 struct target_waitstatus
*ourstatus
;
3386 struct procinfo
*pi
;
3387 struct proc_ctl pctl
;
3391 /* handle all syscall events first, otherwise we might not
3392 notice a thread was created until too late. */
3394 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3399 if (! (THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)) )
3402 why
= THE_PR_LWP(pi
->prstatus
).pr_why
;
3403 what
= THE_PR_LWP(pi
->prstatus
).pr_what
;
3404 if (why
== PR_SYSENTRY
|| why
== PR_SYSEXIT
)
3407 int found_handler
= 0;
3409 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
3410 if (pi
->syscall_handlers
[i
].syscall_num
== what
)
3413 pi
->saved_rtnval
= pi
->pid
;
3414 pi
->saved_statval
= 0;
3415 if (!pi
->syscall_handlers
[i
].func
3416 (pi
, what
, why
, &pi
->saved_rtnval
, &pi
->saved_statval
))
3423 if (why
== PR_SYSENTRY
)
3424 error ("PR_SYSENTRY, unhandled system call %d", what
);
3426 error ("PR_SYSEXIT, unhandled system call %d", what
);
3431 /* find a relevant process with an event */
3433 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3434 if (pi
->had_event
&& (pid
== -1 || pi
->pid
== pid
))
3444 && !(THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3446 if (!procfs_write_pcwstop (pi
))
3453 if (errno
== ENOENT
)
3455 /* XXX Fixme -- what to do if attached? Can't call wait... */
3456 rtnval
= wait (&statval
);
3457 if ((rtnval
) != (PIDGET (inferior_pid
)))
3459 print_sys_errmsg (pi
->pathname
, errno
);
3460 error ("procfs_wait: wait failed, returned %d", rtnval
);
3466 print_sys_errmsg (pi
->pathname
, errno
);
3467 error ("PIOCSTATUS or PIOCWSTOP failed.");
3471 else if (THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3474 rtnval
= pi
->prstatus
.pr_pid
;
3478 why
= THE_PR_LWP(pi
->prstatus
).pr_why
;
3479 what
= THE_PR_LWP(pi
->prstatus
).pr_what
;
3484 statval
= (what
<< 8) | 0177;
3488 rtnval
= pi
->saved_rtnval
;
3489 statval
= pi
->saved_statval
;
3492 statval
= (SIGSTOP
<< 8) | 0177;
3495 statval
= (what
<< 8) | 0177;
3502 statval
= (SIGTRAP
<< 8) | 0177;
3507 statval
= (SIGTRAP
<< 8) | 0177;
3510 #ifndef FAULTED_USE_SIGINFO
3511 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3512 Solaris fills in si_signo. I'm not sure about others. */
3515 statval
= (SIGILL
<< 8) | 0177;
3519 statval
= (SIGTRAP
<< 8) | 0177;
3524 statval
= (SIGSEGV
<< 8) | 0177;
3529 statval
= (SIGFPE
<< 8) | 0177;
3531 case FLTPAGE
: /* Recoverable page fault */
3532 #endif /* not FAULTED_USE_SIGINFO */
3534 /* Use the signal which the kernel assigns. This is better than
3535 trying to second-guess it from the fault. In fact, I suspect
3536 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3538 ((THE_PR_LWP(pi
->prstatus
).pr_info
.si_signo
) << 8) | 0177;
3543 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
3545 /* Stop all the other threads when any of them stops. */
3548 struct procinfo
*procinfo
, *next_pi
;
3550 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3552 next_pi
= procinfo
->next
;
3553 if (!procinfo
->had_event
)
3555 #ifdef PROCFS_USE_READ_WRITE
3557 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3559 print_sys_errmsg (procinfo
->pathname
, errno
);
3560 error ("PCSTOP failed");
3563 /* A bug in Solaris (2.5) causes us to hang when trying to
3564 stop a stopped process. So, we have to check first in
3565 order to avoid the hang. */
3566 if (!procfs_read_status (procinfo
))
3568 /* The LWP has apparently terminated. */
3570 printf_filtered ("LWP %d doesn't respond.\n",
3571 (procinfo
->pid
>> 16) & 0xffff);
3572 close_proc_file (procinfo
);
3576 if (!(procinfo
->prstatus
.pr_flags
& PR_STOPPED
))
3577 if (ioctl (procinfo
->ctl_fd
, PIOCSTOP
, &procinfo
->prstatus
)
3580 print_sys_errmsg (procinfo
->pathname
, errno
);
3581 warning ("PIOCSTOP failed");
3590 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3591 THE_PR_LWP(pi
->prstatus
).pr_flags
);
3594 store_waitstatus (ourstatus
, statval
);
3596 if (rtnval
== -1) /* No more children to wait for */
3598 warning ("Child process unexpectedly missing");
3599 /* Claim it exited with unknown signal. */
3600 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3601 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
3605 pi
->had_event
= 0; /* Indicate that we've seen this one */
3613 set_proc_siginfo - set a process's current signal info
3617 void set_proc_siginfo (struct procinfo *pip, int signo);
3621 Given a pointer to a process info struct in PIP and a signal number
3622 in SIGNO, set the process's current signal and its associated signal
3623 information. The signal will be delivered to the process immediately
3624 after execution is resumed, even if it is being held. In addition,
3625 this particular delivery will not cause another PR_SIGNALLED stop
3626 even if the signal is being traced.
3628 If we are not delivering the same signal that the prstatus siginfo
3629 struct contains information about, then synthesize a siginfo struct
3630 to match the signal we are doing to deliver, make it of the type
3631 "generated by a user process", and send this synthesized copy. When
3632 used to set the inferior's signal state, this will be required if we
3633 are not currently stopped because of a traced signal, or if we decide
3634 to continue with a different signal.
3636 Note that when continuing the inferior from a stop due to receipt
3637 of a traced signal, we either have set PRCSIG to clear the existing
3638 signal, or we have to call this function to do a PIOCSSIG with either
3639 the existing siginfo struct from pr_info, or one we have synthesized
3640 appropriately for the signal we want to deliver. Otherwise if the
3641 signal is still being traced, the inferior will immediately stop
3644 See siginfo(5) for more details.
3648 set_proc_siginfo (pip
, signo
)
3649 struct procinfo
*pip
;
3652 struct siginfo newsiginfo
;
3653 struct siginfo
*sip
;
3654 struct sigi_ctl sictl
;
3656 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3657 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3658 receives a PIOCSSIG with a signal identical to the current signal,
3659 it messes up the current signal. Work around the kernel bug. */
3660 if (signo
== THE_PR_LWP(pip
->prstatus
).pr_cursig
)
3665 if (signo
== THE_PR_LWP(pip
->prstatus
).pr_info
.si_signo
)
3667 memcpy ((char *) &sictl
.siginfo
, (char *) &pip
->prstatus
.pr_lwp
.pr_info
,
3668 sizeof (siginfo_t
));
3671 if (signo
== THE_PR_LWP(pip
->prstatus
).pr_info
.si_signo
)
3673 sip
= &pip
-> prstatus
.pr_info
;
3679 siginfo_t
*sip
= &sictl
.siginfo
;
3680 memset ((char *) sip
, 0, sizeof (siginfo_t
));
3682 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
3685 sip
-> si_signo
= signo
;
3687 sip
-> si_errno
= 0;
3688 sip
-> si_pid
= getpid ();
3689 sip
-> si_uid
= getuid ();
3691 #ifdef PROCFS_USE_READ_WRITE
3693 if (write (pip
->ctl_fd
, (char *) &sictl
, sizeof (struct sigi_ctl
)) < 0)
3695 if (ioctl (pip
->ctl_fd
, PIOCSSIG
, sip
) < 0)
3698 print_sys_errmsg (pip
-> pathname
, errno
);
3699 warning ("PIOCSSIG failed");
3703 /* Resume execution of process PID. If STEP is nozero, then
3704 just single step it. If SIGNAL is nonzero, restart it with that
3705 signal activated. */
3708 procfs_resume (pid
, step
, signo
)
3711 enum target_signal signo
;
3714 struct procinfo
*pi
, *procinfo
, *next_pi
;
3715 struct proc_ctl pctl
;
3717 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
3722 pctl
.data
= PRCFAULT
;
3724 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
3728 /* It should not be necessary. If the user explicitly changes the value,
3729 value_assign calls write_register_bytes, which writes it. */
3730 /* It may not be absolutely necessary to specify the PC value for
3731 restarting, but to be safe we use the value that gdb considers
3732 to be current. One case where this might be necessary is if the
3733 user explicitly changes the PC value that gdb considers to be
3734 current. FIXME: Investigate if this is necessary or not. */
3736 #ifdef PRSVADDR_BROKEN
3737 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3738 place to put nPC. In fact, if you use this, nPC seems to be set to some
3739 random garbage. We have to rely on the fact that PC and nPC have been
3740 written previously via PIOCSREG during a register flush. */
3742 pi
->prrun
.pr_vaddr
= (caddr_t
) *(int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
3743 pi
->prrun
.pr_flags
!= PRSVADDR
;
3747 if (signo
== TARGET_SIGNAL_STOP
&& pi
->nopass_next_sigstop
)
3748 /* When attaching to a child process, if we forced it to stop with
3749 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3750 Upon resuming the first time after such a stop, we explicitly
3751 inhibit sending it another SIGSTOP, which would be the normal
3752 result of default signal handling. One potential drawback to
3753 this is that we will also ignore any attempt to by the user
3754 to explicitly continue after the attach with a SIGSTOP. Ultimately
3755 this problem should be dealt with by making the routines that
3756 deal with the inferior a little smarter, and possibly even allow
3757 an inferior to continue running at the same time as gdb. (FIXME?) */
3759 else if (signo
== TARGET_SIGNAL_TSTP
3760 && THE_PR_LWP(pi
->prstatus
).pr_cursig
== SIGTSTP
3761 && THE_PR_LWP(pi
->prstatus
).pr_action
.sa_handler
== SIG_DFL
3764 /* We are about to pass the inferior a SIGTSTP whose action is
3765 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3766 (notifying the parent via wait()), and then keep going from the
3767 same place when the parent is ready for you to keep going. So
3768 under the debugger, it should do nothing (as if the program had
3769 been stopped and then later resumed. Under ptrace, this
3770 happens for us, but under /proc, the system obligingly stops
3771 the process, and wait_for_inferior would have no way of
3772 distinguishing that type of stop (which indicates that we
3773 should just start it again), with a stop due to the pr_trace
3774 field of the prrun_t struct.
3776 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3777 because the handler needs to get executed. */
3780 signal_to_pass
= target_signal_to_host (signo
);
3784 set_proc_siginfo (pi
, signal_to_pass
);
3789 pctl
.data
|= PRCSIG
;
3791 pi
->prrun
.pr_flags
|= PRCSIG
;
3794 pi
->nopass_next_sigstop
= 0;
3798 pctl
.data
|= PRSTEP
;
3800 pi
->prrun
.pr_flags
|= PRSTEP
;
3804 /* Don't try to start a process unless it's stopped on an
3805 `event of interest'. Doing so will cause errors. */
3807 if (!procfs_read_status (pi
))
3809 /* The LWP has apparently terminated. */
3811 printf_filtered ("LWP %d doesn't respond.\n",
3812 (pi
->pid
>> 16) & 0xffff);
3813 close_proc_file (pi
);
3817 #ifdef PROCFS_USE_READ_WRITE
3818 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
3820 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
3821 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
3824 /* The LWP has apparently terminated. */
3826 printf_filtered ("LWP %d doesn't respond.\n",
3827 (pi
->pid
>> 16) & 0xffff);
3828 close_proc_file (pi
);
3832 /* Continue all the other threads that haven't had an event of interest.
3833 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3834 set by do_attach, and means this is the first resume after an attach.
3835 All threads were CSTOP'd by do_attach, and should be resumed now. */
3838 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3840 next_pi
= procinfo
->next
;
3842 if (!procinfo
->had_event
||
3843 (procinfo
->nopass_next_sigstop
&& signo
== TARGET_SIGNAL_STOP
))
3845 procinfo
->had_event
= procinfo
->nopass_next_sigstop
= 0;
3846 #ifdef PROCFS_USE_READ_WRITE
3847 pctl
.data
= PRCFAULT
| PRCSIG
;
3848 if (write (procinfo
->ctl_fd
, (char *) &pctl
,
3849 sizeof (struct proc_ctl
)) < 0)
3851 if (!procfs_read_status (procinfo
))
3852 fprintf_unfiltered(gdb_stderr
,
3853 "procfs_read_status failed, errno=%d\n",
3855 print_sys_errmsg (procinfo
->pathname
, errno
);
3856 error ("PCRUN failed");
3859 procinfo
->prrun
.pr_flags
&= PRSTEP
;
3860 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
3861 if (!procfs_read_status (procinfo
))
3863 /* The LWP has apparently terminated. */
3865 printf_filtered ("LWP %d doesn't respond.\n",
3866 (procinfo
->pid
>> 16) & 0xffff);
3867 close_proc_file (procinfo
);
3871 /* Don't try to start a process unless it's stopped on an
3872 `event of interest'. Doing so will cause errors. */
3874 if ((procinfo
->prstatus
.pr_flags
& PR_ISTOP
)
3875 && ioctl (procinfo
->ctl_fd
, PIOCRUN
, &procinfo
->prrun
) < 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 warning ("PIOCRUN failed");
3886 procfs_read_status (procinfo
);
3894 procfs_fetch_registers -- fetch current registers from inferior
3898 void procfs_fetch_registers (int regno)
3902 Read the current values of the inferior's registers, both the
3903 general register set and floating point registers (if supported)
3904 and update gdb's idea of their current values.
3909 procfs_fetch_registers (regno
)
3912 struct procinfo
*pi
;
3914 pi
= current_procinfo
;
3917 if (procfs_read_status (pi
))
3919 supply_gregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
3920 #if defined (FP0_REGNUM)
3921 supply_fpregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
);
3924 #else /* UNIXWARE */
3925 if (ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
) != -1)
3927 supply_gregset (&pi
->gregset
.gregset
);
3929 #if defined (FP0_REGNUM)
3930 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
) != -1)
3932 supply_fpregset (&pi
->fpregset
.fpregset
);
3935 #endif /* UNIXWARE */
3942 proc_init_failed - called when /proc access initialization fails
3947 static void proc_init_failed (struct procinfo *pi,
3948 char *why, int kill_p)
3952 This function is called whenever initialization of access to a /proc
3953 entry fails. It prints a suitable error message, does some cleanup,
3954 and then invokes the standard error processing routine which dumps
3955 us back into the command loop. If KILL_P is true, sends SIGKILL.
3959 proc_init_failed (pi
, why
, kill_p
)
3960 struct procinfo
*pi
;
3964 print_sys_errmsg (pi
->pathname
, errno
);
3966 kill (pi
->pid
, SIGKILL
);
3967 close_proc_file (pi
);
3976 close_proc_file - close any currently open /proc entry
3980 static void close_proc_file (struct procinfo *pip)
3984 Close any currently open /proc entry and mark the process information
3985 entry as invalid. In order to ensure that we don't try to reuse any
3986 stale information, the pid, fd, and pathnames are explicitly
3987 invalidated, which may be overkill.
3992 close_proc_file (pip
)
3993 struct procinfo
*pip
;
3995 struct procinfo
*procinfo
;
3997 delete_thread (pip
->pid
); /* remove thread from GDB's thread list */
3998 remove_fd (pip
); /* Remove fd from poll/select list */
4000 close (pip
->ctl_fd
);
4001 #ifdef HAVE_MULTIPLE_PROC_FDS
4003 close (pip
->status_fd
);
4004 close (pip
->map_fd
);
4007 free (pip
-> pathname
);
4009 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4011 if (procinfo_list
== pip
)
4012 procinfo_list
= pip
->next
;
4015 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
4017 if (procinfo
->next
== pip
)
4019 procinfo
->next
= pip
->next
;
4031 open_proc_file - open a /proc entry for a given process id
4035 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4039 Given a process id and a mode, close the existing open /proc
4040 entry (if any) and open one for the new process id, in the
4041 specified mode. Once it is open, then mark the local process
4042 information structure as valid, which guarantees that the pid,
4043 fd, and pathname fields match an open /proc entry. Returns
4044 zero if the open fails, nonzero otherwise.
4046 Note that the pathname is left intact, even when the open fails,
4047 so that callers can use it to construct meaningful error messages
4048 rather than just "file open failed".
4050 Note that for Solaris, the process-id also includes an LWP-id, so we
4051 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4052 then we will ask the kernel what it is and add it to the pid. Hence,
4053 the pid can be changed by us.
4057 open_proc_file (pid
, pip
, mode
, control
)
4059 struct procinfo
*pip
;
4066 pip
-> had_event
= 0;
4067 pip
-> pathname
= xmalloc (MAX_PROC_NAME_SIZE
);
4076 #ifdef HAVE_MULTIPLE_PROC_FDS
4077 sprintf (pip
->pathname
, STATUS_PROC_NAME_FMT
, tmp
);
4078 if ((pip
->status_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4083 sprintf (pip
->pathname
, AS_PROC_NAME_FMT
, tmp
);
4084 if ((pip
->as_fd
= open (pip
->pathname
, O_RDWR
)) < 0)
4086 close (pip
->status_fd
);
4090 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4091 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4093 close (pip
->status_fd
);
4100 sprintf (pip
->pathname
, CTL_PROC_NAME_FMT
, tmp
);
4101 if ((pip
->ctl_fd
= open (pip
->pathname
, O_WRONLY
)) < 0)
4103 close (pip
->status_fd
);
4105 close (pip
->map_fd
);
4110 #else /* HAVE_MULTIPLE_PROC_FDS */
4111 sprintf (pip
-> pathname
, CTL_PROC_NAME_FMT
, tmp
);
4113 if ((tmpfd
= open (pip
-> pathname
, mode
)) < 0)
4117 pip
-> ctl_fd
= tmpfd
;
4118 pip
-> as_fd
= tmpfd
;
4119 pip
-> map_fd
= tmpfd
;
4120 pip
-> status_fd
= tmpfd
;
4122 tmp
= (pid
>> 16) & 0xffff; /* Extract thread id */
4125 { /* Don't know thread id yet */
4126 if (ioctl (tmpfd
, PIOCSTATUS
, &pip
-> prstatus
) < 0)
4128 print_sys_errmsg (pip
-> pathname
, errno
);
4130 error ("open_proc_file: PIOCSTATUS failed");
4133 tmp
= pip
-> prstatus
.pr_who
; /* Get thread id from prstatus_t */
4134 pip
-> pid
= (tmp
<< 16) | pid
; /* Update pip */
4137 if ((pip
-> ctl_fd
= ioctl (tmpfd
, PIOCOPENLWP
, &tmp
)) < 0)
4143 #ifdef PIOCSET /* New method */
4146 pr_flags
= PR_ASYNC
;
4147 ioctl (pip
-> ctl_fd
, PIOCSET
, &pr_flags
);
4151 /* keep extra fds in sync */
4152 pip
->as_fd
= pip
->ctl_fd
;
4153 pip
->map_fd
= pip
->ctl_fd
;
4154 pip
->status_fd
= pip
->ctl_fd
;
4156 close (tmpfd
); /* All done with main pid */
4157 #endif /* PIOCOPENLWP */
4159 #endif /* HAVE_MULTIPLE_PROC_FDS */
4165 mappingflags (flags
)
4168 static char asciiflags
[8];
4170 strcpy (asciiflags
, "-------");
4171 #if defined (MA_PHYS)
4172 if (flags
& MA_PHYS
) asciiflags
[0] = 'd';
4174 if (flags
& MA_STACK
) asciiflags
[1] = 's';
4175 if (flags
& MA_BREAK
) asciiflags
[2] = 'b';
4176 if (flags
& MA_SHARED
) asciiflags
[3] = 's';
4177 if (flags
& MA_READ
) asciiflags
[4] = 'r';
4178 if (flags
& MA_WRITE
) asciiflags
[5] = 'w';
4179 if (flags
& MA_EXEC
) asciiflags
[6] = 'x';
4180 return (asciiflags
);
4184 info_proc_flags (pip
, summary
)
4185 struct procinfo
*pip
;
4188 struct trans
*transp
;
4190 long flags
= pip
->prstatus
.pr_flags
| pip
->prstatus
.pr_lwp
.pr_flags
;
4192 long flags
= pip
->prstatus
.pr_flags
;
4195 printf_filtered ("%-32s", "Process status flags:");
4198 printf_filtered ("\n\n");
4200 for (transp
= pr_flag_table
; transp
-> name
!= NULL
; transp
++)
4202 if (flags
& transp
-> value
)
4206 printf_filtered ("%s ", transp
-> name
);
4210 printf_filtered ("\t%-16s %s.\n", transp
-> name
, transp
-> desc
);
4214 printf_filtered ("\n");
4218 info_proc_stop (pip
, summary
)
4219 struct procinfo
*pip
;
4222 struct trans
*transp
;
4226 why
= THE_PR_LWP(pip
->prstatus
).pr_why
;
4227 what
= THE_PR_LWP(pip
->prstatus
).pr_what
;
4229 if (THE_PR_LWP(pip
->prstatus
).pr_flags
& PR_STOPPED
)
4231 printf_filtered ("%-32s", "Reason for stopping:");
4234 printf_filtered ("\n\n");
4236 for (transp
= pr_why_table
; transp
-> name
!= NULL
; transp
++)
4238 if (why
== transp
-> value
)
4242 printf_filtered ("%s ", transp
-> name
);
4246 printf_filtered ("\t%-16s %s.\n",
4247 transp
-> name
, transp
-> desc
);
4253 /* Use the pr_why field to determine what the pr_what field means, and
4254 print more information. */
4259 /* pr_what is unused for this case */
4265 printf_filtered ("%s ", signalname (what
));
4269 printf_filtered ("\t%-16s %s.\n", signalname (what
),
4270 safe_strsignal (what
));
4276 printf_filtered ("%s ", syscallname (what
));
4280 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4281 "Entered this system call");
4287 printf_filtered ("%s ", syscallname (what
));
4291 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4292 "Returned from this system call");
4298 printf_filtered ("%s ",
4299 lookupname (faults_table
, what
, "fault"));
4303 printf_filtered ("\t%-16s %s.\n",
4304 lookupname (faults_table
, what
, "fault"),
4305 lookupdesc (faults_table
, what
));
4309 printf_filtered ("\n");
4314 info_proc_siginfo (pip
, summary
)
4315 struct procinfo
*pip
;
4318 struct siginfo
*sip
;
4320 if ((THE_PR_LWP(pip
->prstatus
).pr_flags
& PR_STOPPED
) &&
4321 (THE_PR_LWP(pip
->prstatus
).pr_why
== PR_SIGNALLED
||
4322 THE_PR_LWP(pip
->prstatus
).pr_why
== PR_FAULTED
))
4324 printf_filtered ("%-32s", "Additional signal/fault info:");
4325 sip
= &(THE_PR_LWP(pip
->prstatus
).pr_info
);
4328 printf_filtered ("%s ", signalname (sip
-> si_signo
));
4329 if (sip
-> si_errno
> 0)
4331 printf_filtered ("%s ", errnoname (sip
-> si_errno
));
4333 if (sip
-> si_code
<= 0)
4335 printf_filtered ("sent by %s, uid %d ",
4336 target_pid_to_str (sip
-> si_pid
),
4341 printf_filtered ("%s ", sigcodename (sip
));
4342 if ((sip
-> si_signo
== SIGILL
) ||
4343 (sip
-> si_signo
== SIGFPE
) ||
4344 (sip
-> si_signo
== SIGSEGV
) ||
4345 (sip
-> si_signo
== SIGBUS
))
4347 printf_filtered ("addr=%#lx ",
4348 (unsigned long) sip
-> si_addr
);
4350 else if ((sip
-> si_signo
== SIGCHLD
))
4352 printf_filtered ("child %s, status %u ",
4353 target_pid_to_str (sip
-> si_pid
),
4356 else if ((sip
-> si_signo
== SIGPOLL
))
4358 printf_filtered ("band %u ", sip
-> si_band
);
4364 printf_filtered ("\n\n");
4365 printf_filtered ("\t%-16s %s.\n", signalname (sip
-> si_signo
),
4366 safe_strsignal (sip
-> si_signo
));
4367 if (sip
-> si_errno
> 0)
4369 printf_filtered ("\t%-16s %s.\n",
4370 errnoname (sip
-> si_errno
),
4371 safe_strerror (sip
-> si_errno
));
4373 if (sip
-> si_code
<= 0)
4375 printf_filtered ("\t%-16u %s\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4376 "PID of process sending signal");
4377 printf_filtered ("\t%-16u %s\n", sip
-> si_uid
,
4378 "UID of process sending signal");
4382 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
4384 if ((sip
-> si_signo
== SIGILL
) ||
4385 (sip
-> si_signo
== SIGFPE
))
4387 printf_filtered ("\t%#-16lx %s.\n",
4388 (unsigned long) sip
-> si_addr
,
4389 "Address of faulting instruction");
4391 else if ((sip
-> si_signo
== SIGSEGV
) ||
4392 (sip
-> si_signo
== SIGBUS
))
4394 printf_filtered ("\t%#-16lx %s.\n",
4395 (unsigned long) sip
-> si_addr
,
4396 "Address of faulting memory reference");
4398 else if ((sip
-> si_signo
== SIGCHLD
))
4400 printf_filtered ("\t%-16u %s.\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4401 "Child process ID");
4402 printf_filtered ("\t%-16u %s.\n", sip
-> si_status
,
4403 "Child process exit value or signal");
4405 else if ((sip
-> si_signo
== SIGPOLL
))
4407 printf_filtered ("\t%-16u %s.\n", sip
-> si_band
,
4408 "Band event for POLL_{IN,OUT,MSG}");
4412 printf_filtered ("\n");
4417 info_proc_syscalls (pip
, summary
)
4418 struct procinfo
*pip
;
4426 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4427 if (pip
-> prstatus
.pr_flags
& PR_ASLEEP
)
4429 int syscallnum
= pip
-> prstatus
.pr_reg
[R_D0
];
4432 printf_filtered ("%-32s", "Sleeping in system call:");
4433 printf_filtered ("%s", syscallname (syscallnum
));
4437 printf_filtered ("Sleeping in system call '%s'.\n",
4438 syscallname (syscallnum
));
4444 if (ioctl (pip
-> ctl_fd
, PIOCGENTRY
, &pip
-> entryset
) < 0)
4446 print_sys_errmsg (pip
-> pathname
, errno
);
4447 error ("PIOCGENTRY failed");
4450 if (ioctl (pip
-> ctl_fd
, PIOCGEXIT
, &pip
-> exitset
) < 0)
4452 print_sys_errmsg (pip
-> pathname
, errno
);
4453 error ("PIOCGEXIT failed");
4457 printf_filtered ("System call tracing information:\n\n");
4459 printf_filtered ("\t%-12s %-8s %-8s\n",
4463 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
4466 if (syscall_table
[syscallnum
] != NULL
)
4467 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
4469 printf_filtered ("\t%-12d ", syscallnum
);
4472 printf_filtered ("%-8s ",
4473 prismember (&pip
->prstatus
.pr_sysentry
, syscallnum
)
4475 printf_filtered ("%-8s ",
4476 prismember (&pip
->prstatus
.pr_sysexit
, syscallnum
)
4479 printf_filtered ("%-8s ",
4480 prismember (&pip
-> entryset
, syscallnum
)
4482 printf_filtered ("%-8s ",
4483 prismember (&pip
-> exitset
, syscallnum
)
4486 printf_filtered ("\n");
4488 printf_filtered ("\n");
4497 static char locbuf
[32];
4499 name
= strsigno (signo
);
4502 sprintf (locbuf
, "Signal %d", signo
);
4506 sprintf (locbuf
, "%s (%d)", name
, signo
);
4516 static char locbuf
[32];
4518 name
= strerrno (errnum
);
4521 sprintf (locbuf
, "Errno %d", errnum
);
4525 sprintf (locbuf
, "%s (%d)", name
, errnum
);
4531 info_proc_signals (pip
, summary
)
4532 struct procinfo
*pip
;
4539 #ifndef PROCFS_USE_READ_WRITE
4540 if (ioctl (pip
-> ctl_fd
, PIOCGTRACE
, &pip
-> trace
) < 0)
4542 print_sys_errmsg (pip
-> pathname
, errno
);
4543 error ("PIOCGTRACE failed");
4547 printf_filtered ("Disposition of signals:\n\n");
4548 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4549 "Signal", "Trace", "Hold", "Pending", "Description");
4550 for (signo
= 0; signo
< NSIG
; signo
++)
4553 printf_filtered ("\t%-15s ", signalname (signo
));
4555 printf_filtered ("%-8s ",
4556 prismember (&pip
-> prstatus
.pr_sigtrace
, signo
)
4558 printf_filtered ("%-8s ",
4559 prismember (&pip
-> prstatus
.pr_lwp
.pr_context
.uc_sigmask
, signo
)
4562 printf_filtered ("%-8s ",
4563 prismember (&pip
-> trace
, signo
)
4565 printf_filtered ("%-8s ",
4566 prismember (&pip
-> prstatus
.pr_sighold
, signo
)
4571 if (prismember (&pip
->prstatus
.pr_sigpend
, signo
) ||
4572 prismember (&pip
->prstatus
.pr_lwp
.pr_lwppend
, signo
))
4573 printf_filtered("%-8s ", "yes");
4575 printf_filtered("%-8s ", "no");
4576 #else /* UNIXWARE */
4577 #ifdef PROCFS_SIGPEND_OFFSET
4578 /* Alpha OSF/1 numbers the pending signals from 1. */
4579 printf_filtered ("%-8s ",
4580 (signo
? prismember (&pip
-> prstatus
.pr_sigpend
,
4585 printf_filtered ("%-8s ",
4586 prismember (&pip
-> prstatus
.pr_sigpend
, signo
)
4589 #endif /* UNIXWARE */
4590 printf_filtered (" %s\n", safe_strsignal (signo
));
4592 printf_filtered ("\n");
4597 info_proc_faults (pip
, summary
)
4598 struct procinfo
*pip
;
4601 struct trans
*transp
;
4606 if (ioctl (pip
-> ctl_fd
, PIOCGFAULT
, &pip
->fltset
.fltset
) < 0)
4608 print_sys_errmsg (pip
-> pathname
, errno
);
4609 error ("PIOCGFAULT failed");
4613 printf_filtered ("Current traced hardware fault set:\n\n");
4614 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4616 for (transp
= faults_table
; transp
-> name
!= NULL
; transp
++)
4619 printf_filtered ("\t%-12s ", transp
-> name
);
4621 printf_filtered ("%-8s", prismember (&pip
->prstatus
.pr_flttrace
, transp
-> value
)
4624 printf_filtered ("%-8s", prismember (&pip
->fltset
.fltset
, transp
-> value
)
4627 printf_filtered ("\n");
4629 printf_filtered ("\n");
4634 info_proc_mappings (pip
, summary
)
4635 struct procinfo
*pip
;
4639 struct prmap
*prmaps
;
4640 struct prmap
*prmap
;
4645 printf_filtered ("Mapped address spaces:\n\n");
4646 #ifdef BFD_HOST_64_BIT
4647 printf_filtered (" %18s %18s %10s %10s %7s\n",
4649 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4656 #ifdef PROCFS_USE_READ_WRITE
4657 if (fstat (pip
->map_fd
, &sbuf
) == 0)
4659 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
4660 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4661 if ((lseek (pip
->map_fd
, 0, SEEK_SET
) == 0) &&
4662 (read (pip
->map_fd
, (char *) prmaps
,
4663 nmap
* sizeof (*prmaps
)) == (nmap
* sizeof (*prmaps
))))
4666 for (prmap
= prmaps
; i
< nmap
; ++prmap
, ++i
)
4668 if (ioctl (pip
-> ctl_fd
, PIOCNMAP
, &nmap
) == 0)
4670 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4671 if (ioctl (pip
-> ctl_fd
, PIOCMAP
, prmaps
) == 0)
4673 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
4674 #endif /* PROCFS_USE_READ_WRITE */
4676 #ifdef BFD_HOST_64_BIT
4677 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4679 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4681 (unsigned long)prmap
-> pr_vaddr
,
4682 (unsigned long)prmap
-> pr_vaddr
4683 + prmap
-> pr_size
- 1,
4686 mappingflags (prmap
-> pr_mflags
));
4690 printf_filtered ("\n");
4698 info_proc -- implement the "info proc" command
4702 void info_proc (char *args, int from_tty)
4706 Implement gdb's "info proc" command by using the /proc interface
4707 to print status information about any currently running process.
4709 Examples of the use of "info proc" are:
4711 info proc (prints summary info for current inferior)
4712 info proc 123 (prints summary info for process with pid 123)
4713 info proc mappings (prints address mappings)
4714 info proc times (prints process/children times)
4715 info proc id (prints pid, ppid, gid, sid, etc)
4716 FIXME: i proc id not implemented.
4717 info proc status (prints general process state info)
4718 FIXME: i proc status not implemented.
4719 info proc signals (prints info about signal handling)
4720 info proc all (prints all info)
4725 info_proc (args
, from_tty
)
4730 struct procinfo
*pip
;
4731 struct cleanup
*old_chain
;
4747 old_chain
= make_cleanup (null_cleanup
, 0);
4749 /* Default to using the current inferior if no pid specified. Note
4750 that inferior_pid may be 0, hence we set okerr. */
4752 pid
= inferior_pid
& 0x7fffffff; /* strip off sol-thread bit */
4753 if (!(pip
= find_procinfo (pid
, 1))) /* inferior_pid no good? */
4754 pip
= procinfo_list
; /* take first available */
4755 pid
= pid
& 0xffff; /* extract "real" pid */
4759 if ((argv
= buildargv (args
)) == NULL
)
4763 make_cleanup (freeargv
, (char *) argv
);
4765 while (*argv
!= NULL
)
4767 argsize
= strlen (*argv
);
4768 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
4773 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
4778 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
4783 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
4788 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
4793 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
4798 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
4803 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
4808 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
4813 else if ((pid
= atoi (*argv
)) > 0)
4815 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4816 memset (pip
, 0, sizeof (*pip
));
4819 if (!open_proc_file (pid
, pip
, O_RDONLY
, 0))
4821 perror_with_name (pip
-> pathname
);
4825 make_cleanup (close_proc_file
, pip
);
4827 else if (**argv
!= '\000')
4829 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
4835 /* If we don't have a valid open process at this point, then we have no
4836 inferior or didn't specify a specific pid. */
4841 No process. Start debugging a program or specify an explicit process ID.");
4844 if (!procfs_read_status (pip
))
4846 print_sys_errmsg (pip
-> pathname
, errno
);
4847 error ("procfs_read_status failed");
4850 #ifndef PROCFS_USE_READ_WRITE
4852 nlwp
= pip
->prstatus
.pr_nlwp
;
4853 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (*lwps
));
4855 if (ioctl (pip
->ctl_fd
, PIOCLWPIDS
, lwps
))
4857 print_sys_errmsg (pip
-> pathname
, errno
);
4858 error ("PIOCLWPIDS failed");
4860 #else /* PIOCLWPIDS */
4862 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
4864 #endif /* PIOCLWPIDS */
4866 for (; nlwp
> 0; nlwp
--, lwps
++)
4868 pip
= find_procinfo ((*lwps
<< 16) | pid
, 1);
4872 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4873 memset (pip
, 0, sizeof (*pip
));
4874 if (!open_proc_file ((*lwps
<< 16) | pid
, pip
, O_RDONLY
, 0))
4877 make_cleanup (close_proc_file
, pip
);
4879 if (!procfs_read_status (pip
))
4881 print_sys_errmsg (pip
-> pathname
, errno
);
4882 error ("procfs_read_status failed");
4886 #endif /* PROCFS_USE_READ_WRITE */
4888 /* Print verbose information of the requested type(s), or just a summary
4889 of the information for all types. */
4891 printf_filtered ("\nInformation for %s.%d:\n\n", pip
-> pathname
, *lwps
);
4892 if (summary
|| all
|| flags
)
4894 info_proc_flags (pip
, summary
);
4898 info_proc_stop (pip
, summary
);
4900 supply_gregset (&pip
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
4902 supply_gregset (&pip
->prstatus
.pr_reg
);
4904 printf_filtered ("PC: ");
4905 print_address (read_pc (), gdb_stdout
);
4906 printf_filtered ("\n");
4908 if (summary
|| all
|| signals
|| faults
)
4910 info_proc_siginfo (pip
, summary
);
4912 if (summary
|| all
|| syscalls
)
4914 info_proc_syscalls (pip
, summary
);
4916 if (summary
|| all
|| mappings
)
4918 info_proc_mappings (pip
, summary
);
4920 if (summary
|| all
|| signals
)
4922 info_proc_signals (pip
, summary
);
4924 if (summary
|| all
|| faults
)
4926 info_proc_faults (pip
, summary
);
4928 printf_filtered ("\n");
4930 /* All done, deal with closing any temporary process info structure,
4931 freeing temporary memory , etc. */
4933 do_cleanups (old_chain
);
4934 #ifndef PROCFS_USE_READ_WRITE
4943 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
4947 void modify_inherit_on_fork_flag (fd, flag)
4951 Call this routine to modify the inherit-on-fork flag. This routine is
4952 just a nice wrapper to hide the #ifdefs needed by various systems to
4958 modify_inherit_on_fork_flag (fd
, flag
)
4962 #if defined (PIOCSET) || defined (PCSET)
4966 struct proc_ctl pctl
;
4968 #if defined (PIOCSET) || defined (PCSET) /* New method */
4972 #ifdef PROCFS_USE_READ_WRITE
4974 pctl
.data
= PR_FORK
;
4975 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
4978 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
4983 #ifdef PROCFS_USE_READ_WRITE
4985 pctl
.data
= PR_FORK
;
4986 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
4989 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
4994 #ifdef PIOCSFORK /* Original method */
4997 retval
= ioctl (fd
, PIOCSFORK
, NULL
);
5001 retval
= ioctl (fd
, PIOCRFORK
, NULL
);
5004 Neither PR_FORK nor PIOCSFORK exist
!!!
5011 print_sys_errmsg ("modify_inherit_on_fork_flag", errno
);
5012 error ("PIOCSFORK or PR_FORK modification failed");
5019 modify_run_on_last_close_flag - Change the run-on-last-close flag
5023 void modify_run_on_last_close_flag (fd, flag)
5027 Call this routine to modify the run-on-last-close flag. This routine
5028 is just a nice wrapper to hide the #ifdefs needed by various systems to
5034 modify_run_on_last_close_flag (fd
, flag
)
5038 #if defined (PIOCSET) || defined (PCSET)
5042 struct proc_ctl pctl
;
5044 #if defined (PIOCSET) || defined (PCSET) /* New method */
5048 #ifdef PROCFS_USE_READ_WRITE
5051 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5054 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5059 #ifdef PROCFS_USE_READ_WRITE
5062 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5065 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5070 #ifdef PIOCSRLC /* Original method */
5072 retval
= ioctl (fd
, PIOCSRLC
, NULL
);
5074 retval
= ioctl (fd
, PIOCRRLC
, NULL
);
5076 Neither PR_RLC nor PIOCSRLC exist
!!!
5083 print_sys_errmsg ("modify_run_on_last_close_flag", errno
);
5084 error ("PIOCSRLC or PR_RLC modification failed");
5091 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5095 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5099 This function function disables traps for the specified system call.
5100 errok is non-zero if errors should be ignored.
5104 procfs_clear_syscall_trap (pi
, syscall_num
, errok
)
5105 struct procinfo
*pi
;
5113 goterr
= ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0;
5115 if (goterr
&& !errok
)
5117 print_sys_errmsg (pi
->pathname
, errno
);
5118 error ("PIOCGENTRY failed");
5123 prdelset (&sysset
, syscall_num
);
5125 if ((ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0) && !errok
)
5127 print_sys_errmsg (pi
->pathname
, errno
);
5128 error ("PIOCSENTRY failed");
5132 goterr
= ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0;
5134 if (goterr
&& !errok
)
5136 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5137 print_sys_errmsg (pi
->pathname
, errno
);
5138 error ("PIOCGEXIT failed");
5143 praddset (&sysset
, syscall_num
);
5145 if ((ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0) && !errok
)
5147 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5148 print_sys_errmsg (pi
->pathname
, errno
);
5149 error ("PIOCSEXIT failed");
5154 if (!pi
->syscall_handlers
)
5157 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5161 /* Remove handler func from the handler list */
5163 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5164 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5166 if (i
+ 1 != pi
->num_syscall_handlers
)
5167 { /* Not the last entry.
5168 Move subsequent entries fwd. */
5169 memcpy (&pi
->syscall_handlers
[i
], &pi
->syscall_handlers
[i
+ 1],
5170 (pi
->num_syscall_handlers
- i
- 1)
5171 * sizeof (struct procfs_syscall_handler
));
5174 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
,
5175 (pi
->num_syscall_handlers
- 1)
5176 * sizeof (struct procfs_syscall_handler
));
5177 pi
->num_syscall_handlers
--;
5182 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5190 procfs_set_syscall_trap -- arrange for a function to be called when the
5191 child executes the specified system call.
5195 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5196 syscall_func_t *function)
5200 This function sets up an entry and/or exit trap for the specified system
5201 call. When the child executes the specified system call, your function
5202 will be called with the call #, a flag that indicates entry or exit, and
5203 pointers to rtnval and statval (which are used by procfs_wait). The
5204 function should return non-zero if something interesting happened, zero
5209 procfs_set_syscall_trap (pi
, syscall_num
, flags
, func
)
5210 struct procinfo
*pi
;
5213 syscall_func_t
*func
;
5218 if (flags
& PROCFS_SYSCALL_ENTRY
)
5220 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0)
5222 print_sys_errmsg (pi
->pathname
, errno
);
5223 error ("PIOCGENTRY failed");
5226 praddset (&sysset
, syscall_num
);
5228 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0)
5230 print_sys_errmsg (pi
->pathname
, errno
);
5231 error ("PIOCSENTRY failed");
5235 if (flags
& PROCFS_SYSCALL_EXIT
)
5237 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0)
5239 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5240 print_sys_errmsg (pi
->pathname
, errno
);
5241 error ("PIOCGEXIT failed");
5244 praddset (&sysset
, syscall_num
);
5246 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0)
5248 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5249 print_sys_errmsg (pi
->pathname
, errno
);
5250 error ("PIOCSEXIT failed");
5255 if (!pi
->syscall_handlers
)
5257 pi
->syscall_handlers
= xmalloc (sizeof (struct procfs_syscall_handler
));
5258 pi
->syscall_handlers
[0].syscall_num
= syscall_num
;
5259 pi
->syscall_handlers
[0].func
= func
;
5260 pi
->num_syscall_handlers
= 1;
5266 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5267 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5269 pi
->syscall_handlers
[i
].func
= func
;
5273 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
, (i
+ 1)
5274 * sizeof (struct procfs_syscall_handler
));
5275 pi
->syscall_handlers
[i
].syscall_num
= syscall_num
;
5276 pi
->syscall_handlers
[i
].func
= func
;
5277 pi
->num_syscall_handlers
++;
5281 #ifdef SYS_lwp_create
5287 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5291 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5295 This routine is called both when an inferior process and it's new lwp
5296 are about to finish a _lwp_create() system call. This is the system
5297 call that Solaris uses to create a lightweight process. When the
5298 target process gets this event, we can look at sysarg[2] to find the
5299 new childs lwp ID, and create a procinfo struct from that. After that,
5300 we pretend that we got a SIGTRAP, and return non-zero to tell
5301 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5302 sees the new process and continues it.
5304 When we see the child exiting from lwp_create, we just contine it,
5305 since everything was handled when the parent trapped.
5308 In effect, we are only paying attention to the parent's completion of
5309 the lwp_create syscall. If we only paid attention to the child
5310 instead, then we wouldn't detect the creation of a suspended thread.
5314 procfs_lwp_creation_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
5315 struct procinfo
*pi
;
5322 struct procinfo
*childpi
;
5323 struct proc_ctl pctl
;
5325 /* We've just detected the completion of an lwp_create system call. Now we
5326 need to setup a procinfo struct for this thread, and notify the thread
5327 system of the new arrival. */
5329 /* If lwp_create failed, then nothing interesting happened. Continue the
5330 process and go back to sleep. */
5333 /* Joel ... can you check this logic out please? JKJ */
5334 if (pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
[R_EFL
] & 1)
5335 { /* _lwp_create failed */
5337 pctl
.data
= PRCFAULT
;
5339 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5340 perror_with_name (pi
->pathname
);
5344 #else /* UNIXWARE */
5345 if (PROCFS_GET_CARRY (pi
->prstatus
.pr_reg
))
5346 { /* _lwp_create failed */
5347 pi
->prrun
.pr_flags
&= PRSTEP
;
5348 pi
->prrun
.pr_flags
|= PRCFAULT
;
5350 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5351 perror_with_name (pi
->pathname
);
5357 /* At this point, the new thread is stopped at it's first instruction, and
5358 the parent is stopped at the exit from lwp_create. */
5360 if (pi
->new_child
) /* Child? */
5361 { /* Yes, just continue it */
5364 pctl
.data
= PRCFAULT
;
5366 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5367 #else /* !UNIXWARE */
5368 pi
->prrun
.pr_flags
&= PRSTEP
;
5369 pi
->prrun
.pr_flags
|= PRCFAULT
;
5371 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
5372 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5373 #endif /* !UNIXWARE */
5374 perror_with_name (pi
->pathname
);
5376 pi
->new_child
= 0; /* No longer new */
5381 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5382 in the child and continue the parent. */
5384 /* Third arg is pointer to new thread id. */
5385 lwp_id
= read_memory_integer (
5386 THE_PR_LWP(pi
->prstatus
).pr_sysarg
[2], sizeof (int));
5388 lwp_id
= (lwp_id
<< 16) | PIDGET (pi
->pid
);
5390 childpi
= create_procinfo (lwp_id
);
5392 /* The new process has actually inherited the lwp_create syscall trap from
5393 it's parent, but we still have to call this to register handlers for
5396 procfs_set_inferior_syscall_traps (childpi
);
5397 add_thread (lwp_id
);
5398 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id
));
5400 /* Continue the parent */
5403 pctl
.data
= PRCFAULT
;
5405 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5407 pi
->prrun
.pr_flags
&= PRSTEP
;
5408 pi
->prrun
.pr_flags
|= PRCFAULT
;
5409 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5411 perror_with_name (pi
->pathname
);
5413 /* The new child may have been created in one of two states:
5414 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5415 If suspended, we flag it to be continued later, when it has an event. */
5417 if (THE_PR_LWP(childpi
->prstatus
).pr_why
== PR_SUSPENDED
)
5418 childpi
->new_child
= 1; /* Flag this as an unseen child process */
5421 /* Continue the child */
5424 pctl
.data
= PRCFAULT
;
5426 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5428 childpi
->prrun
.pr_flags
&= PRSTEP
;
5429 childpi
->prrun
.pr_flags
|= PRCFAULT
;
5431 if (ioctl (childpi
->ctl_fd
, PIOCRUN
, &childpi
->prrun
) != 0)
5433 perror_with_name (childpi
->pathname
);
5437 #endif /* SYS_lwp_create */
5439 /* Fork an inferior process, and start debugging it with /proc. */
5442 procfs_create_inferior (exec_file
, allargs
, env
)
5447 char *shell_file
= getenv ("SHELL");
5449 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
5452 /* We will be looking down the PATH to find shell_file. If we
5453 just do this the normal way (via execlp, which operates by
5454 attempting an exec for each element of the PATH until it
5455 finds one which succeeds), then there will be an exec for
5456 each failed attempt, each of which will cause a PR_SYSEXIT
5457 stop, and we won't know how to distinguish the PR_SYSEXIT's
5458 for these failed execs with the ones for successful execs
5459 (whether the exec has succeeded is stored at that time in the
5460 carry bit or some such architecture-specific and
5461 non-ABI-specified place).
5463 So I can't think of anything better than to search the PATH
5464 now. This has several disadvantages: (1) There is a race
5465 condition; if we find a file now and it is deleted before we
5466 exec it, we lose, even if the deletion leaves a valid file
5467 further down in the PATH, (2) there is no way to know exactly
5468 what an executable (in the sense of "capable of being
5469 exec'd") file is. Using access() loses because it may lose
5470 if the caller is the superuser; failing to use it loses if
5471 there are ACLs or some such. */
5475 /* FIXME-maybe: might want "set path" command so user can change what
5476 path is used from within GDB. */
5477 char *path
= getenv ("PATH");
5479 struct stat statbuf
;
5482 path
= "/bin:/usr/bin";
5484 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
5485 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1: NULL
)
5487 p1
= strchr (p
, ':');
5492 strncpy (tryname
, p
, len
);
5493 tryname
[len
] = '\0';
5494 strcat (tryname
, "/");
5495 strcat (tryname
, shell_file
);
5496 if (access (tryname
, X_OK
) < 0)
5498 if (stat (tryname
, &statbuf
) < 0)
5500 if (!S_ISREG (statbuf
.st_mode
))
5501 /* We certainly need to reject directories. I'm not quite
5502 as sure about FIFOs, sockets, etc., but I kind of doubt
5503 that people want to exec() these things. */
5508 /* Not found. This must be an error rather than merely passing
5509 the file to execlp(), because execlp() would try all the
5510 exec()s, causing GDB to get confused. */
5511 error ("Can't find shell %s in PATH", shell_file
);
5513 shell_file
= tryname
;
5516 fork_inferior (exec_file
, allargs
, env
,
5517 proc_set_exec_trap
, procfs_init_inferior
, NULL
, shell_file
);
5519 /* We are at the first instruction we care about. */
5520 /* Pedal to the metal... */
5522 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
5525 /* Clean up after the inferior dies. */
5528 procfs_mourn_inferior ()
5530 struct procinfo
*pi
;
5531 struct procinfo
*next_pi
;
5533 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5536 unconditionally_kill_inferior (pi
);
5539 unpush_target (&procfs_ops
);
5540 generic_mourn_inferior ();
5544 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5548 /* This variable is controlled by modules that sit atop procfs that may layer
5549 their own process structure atop that provided here. sol-thread.c does
5550 this because of the Solaris two-level thread model. */
5552 return !procfs_suppress_run
;
5554 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5557 /* Insert a watchpoint */
5559 procfs_set_watchpoint(pid
, addr
, len
, rw
)
5565 struct procinfo
*pi
;
5568 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5569 wpt
.pr_vaddr
= (caddr_t
)addr
;
5571 wpt
.pr_wflags
= ((rw
& 1) ? MA_READ
: 0) | ((rw
& 2) ? MA_WRITE
: 0);
5572 if (ioctl (pi
->ctl_fd
, PIOCSWATCH
, &wpt
) < 0)
5576 /* Currently it sometimes happens that the same watchpoint gets
5577 deleted twice - don't die in this case (FIXME please) */
5578 if (errno
== ESRCH
&& len
== 0)
5580 print_sys_errmsg (pi
->pathname
, errno
);
5581 error ("PIOCSWATCH failed");
5587 procfs_stopped_by_watchpoint(pid
)
5590 struct procinfo
*pi
;
5594 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5595 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
5597 why
= pi
->prstatus
.pr_why
;
5598 what
= pi
->prstatus
.pr_what
;
5599 if (why
== PR_FAULTED
5600 #if defined (FLTWATCH) && defined (FLTKWATCH)
5601 && (what
== FLTWATCH
|| what
== FLTKWATCH
)
5604 && (what
== FLTWATCH
)
5607 && (what
== FLTKWATCH
)
5615 #endif /* !UNIXWARE */
5616 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5618 /* Why is this necessary? Shouldn't dead threads just be removed from the
5622 procfs_thread_alive (pid
)
5625 struct procinfo
*pi
, *next_pi
;
5627 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5630 if (pi
-> pid
== pid
)
5631 if (procfs_read_status (pi
)) /* alive */
5633 else /* defunct (exited) */
5635 close_proc_file (pi
);
5643 procfs_first_available ()
5645 struct procinfo
*pi
;
5647 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
5649 if (procfs_read_status (pi
))
5656 procfs_get_pid_fd (pid
)
5659 struct procinfo
*pi
= find_procinfo (pid
, 1);
5667 /* Send a SIGINT to the process group. This acts just like the user typed a
5668 ^C on the controlling terminal.
5670 XXX - This may not be correct for all systems. Some may want to use
5671 killpg() instead of kill (-pgrp). */
5676 extern pid_t inferior_process_group
;
5678 kill (-inferior_process_group
, SIGINT
);
5681 /* Convert a pid to printable form. */
5685 procfs_pid_to_str (pid
)
5688 static char buf
[100];
5690 sprintf (buf
, "Kernel thread %d", TIDGET (pid
));
5700 procfs_ops
.to_shortname
= "procfs";
5701 procfs_ops
.to_longname
= "Unix /proc child process";
5702 procfs_ops
.to_doc
= "Unix /proc child process (started by the \"run\" command).";
5703 procfs_ops
.to_open
= procfs_open
;
5704 procfs_ops
.to_attach
= procfs_attach
;
5705 procfs_ops
.to_detach
= procfs_detach
;
5706 procfs_ops
.to_resume
= procfs_resume
;
5707 procfs_ops
.to_wait
= procfs_wait
;
5708 procfs_ops
.to_fetch_registers
= procfs_fetch_registers
;
5709 procfs_ops
.to_store_registers
= procfs_store_registers
;
5710 procfs_ops
.to_prepare_to_store
= procfs_prepare_to_store
;
5711 procfs_ops
.to_xfer_memory
= procfs_xfer_memory
;
5712 procfs_ops
.to_files_info
= procfs_files_info
;
5713 procfs_ops
.to_insert_breakpoint
= memory_insert_breakpoint
;
5714 procfs_ops
.to_remove_breakpoint
= memory_remove_breakpoint
;
5715 procfs_ops
.to_terminal_init
= terminal_init_inferior
;
5716 procfs_ops
.to_terminal_inferior
= terminal_inferior
;
5717 procfs_ops
.to_terminal_ours_for_output
= terminal_ours_for_output
;
5718 procfs_ops
.to_terminal_ours
= terminal_ours
;
5719 procfs_ops
.to_terminal_info
= child_terminal_info
;
5720 procfs_ops
.to_kill
= procfs_kill_inferior
;
5721 procfs_ops
.to_create_inferior
= procfs_create_inferior
;
5722 procfs_ops
.to_mourn_inferior
= procfs_mourn_inferior
;
5723 procfs_ops
.to_can_run
= procfs_can_run
;
5724 procfs_ops
.to_notice_signals
= procfs_notice_signals
;
5725 procfs_ops
.to_thread_alive
= procfs_thread_alive
;
5726 procfs_ops
.to_stop
= procfs_stop
;
5727 procfs_ops
.to_stratum
= process_stratum
;
5728 procfs_ops
.to_has_all_memory
= 1;
5729 procfs_ops
.to_has_memory
= 1;
5730 procfs_ops
.to_has_stack
= 1;
5731 procfs_ops
.to_has_registers
= 1;
5732 procfs_ops
.to_has_execution
= 1;
5733 procfs_ops
.to_magic
= OPS_MAGIC
;
5737 _initialize_procfs ()
5739 #ifdef HAVE_OPTIONAL_PROC_FS
5740 char procname
[MAX_PROC_NAME_SIZE
];
5743 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5744 don't add procfs support if we cannot access the running
5746 sprintf (procname
, STATUS_PROC_NAME_FMT
, getpid ());
5747 if ((fd
= open (procname
, O_RDONLY
)) < 0)
5753 add_target (&procfs_ops
);
5755 add_info ("processes", info_proc
,
5756 "Show process status information using /proc entry.\n\
5757 Specify process id or use current inferior by default.\n\
5758 Specify keywords for detailed information; default is summary.\n\
5759 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5760 `status', `syscalls', and `times'.\n\
5761 Unambiguous abbreviations may be used.");
5763 init_syscall_table ();