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 close_proc_file_cleanup
PARAMS ((void*));
587 static struct cleanup
*make_cleanup_close_proc_file
PARAMS ((struct procinfo
*));
589 static void unconditionally_kill_inferior
PARAMS ((struct procinfo
*));
591 static NORETURN
void proc_init_failed
PARAMS ((struct procinfo
*, char *, int)) ATTR_NORETURN
;
593 static void info_proc
PARAMS ((char *, int));
595 static void info_proc_flags
PARAMS ((struct procinfo
*, int));
597 static void info_proc_stop
PARAMS ((struct procinfo
*, int));
599 static void info_proc_siginfo
PARAMS ((struct procinfo
*, int));
601 static void info_proc_syscalls
PARAMS ((struct procinfo
*, int));
603 static void info_proc_mappings
PARAMS ((struct procinfo
*, int));
605 static void info_proc_signals
PARAMS ((struct procinfo
*, int));
607 static void info_proc_faults
PARAMS ((struct procinfo
*, int));
609 static char *mappingflags
PARAMS ((long));
611 static char *lookupname
PARAMS ((struct trans
*, unsigned int, char *));
613 static char *lookupdesc
PARAMS ((struct trans
*, unsigned int));
615 static int do_attach
PARAMS ((int pid
));
617 static void do_detach
PARAMS ((int siggnal
));
619 static void procfs_create_inferior
PARAMS ((char *, char *, char **));
621 static void procfs_notice_signals
PARAMS ((int pid
));
623 static void notice_signals
PARAMS ((struct procinfo
*, struct sig_ctl
*));
625 static struct procinfo
*find_procinfo
PARAMS ((pid_t pid
, int okfail
));
627 static int procfs_write_pcwstop
PARAMS ((struct procinfo
*));
628 static int procfs_read_status
PARAMS ((struct procinfo
*));
629 static void procfs_write_pckill
PARAMS ((struct procinfo
*));
631 typedef int syscall_func_t
PARAMS ((struct procinfo
*pi
, int syscall_num
,
632 int why
, int *rtnval
, int *statval
));
634 static void procfs_set_syscall_trap
PARAMS ((struct procinfo
*pi
,
635 int syscall_num
, int flags
,
636 syscall_func_t
*func
));
638 static void procfs_clear_syscall_trap
PARAMS ((struct procinfo
*pi
,
639 int syscall_num
, int errok
));
641 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
642 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
644 static syscall_func_t procfs_exit_handler
;
646 static syscall_func_t procfs_exec_handler
;
649 static syscall_func_t procfs_sproc_handler
;
650 static syscall_func_t procfs_fork_handler
;
653 #ifdef SYS_lwp_create
654 static syscall_func_t procfs_lwp_creation_handler
;
657 static void modify_inherit_on_fork_flag
PARAMS ((int fd
, int flag
));
658 static void modify_run_on_last_close_flag
PARAMS ((int fd
, int flag
));
662 struct procfs_syscall_handler
664 int syscall_num
; /* The number of the system call being handled */
665 /* The function to be called */
666 syscall_func_t
*func
;
669 static void procfs_resume
PARAMS ((int pid
, int step
,
670 enum target_signal signo
));
672 static void init_procfs_ops
PARAMS ((void));
674 /* External function prototypes that can't be easily included in any
675 header file because the args are typedefs in system include files. */
677 extern void supply_gregset
PARAMS ((gdb_gregset_t
*));
679 extern void fill_gregset
PARAMS ((gdb_gregset_t
*, int));
682 extern void supply_fpregset
PARAMS ((gdb_fpregset_t
*));
684 extern void fill_fpregset
PARAMS ((gdb_fpregset_t
*, int));
691 find_procinfo -- convert a process id to a struct procinfo
695 static struct procinfo * find_procinfo (pid_t pid, int okfail);
699 Given a process id, look it up in the procinfo chain. Returns
700 a struct procinfo *. If can't find pid, then call error(),
701 unless okfail is set, in which case, return NULL;
704 static struct procinfo
*
705 find_procinfo (pid
, okfail
)
709 struct procinfo
*procinfo
;
711 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
712 if (procinfo
->pid
== pid
)
718 error ("procfs (find_procinfo): Couldn't locate pid %d", pid
);
725 current_procinfo -- convert inferior_pid to a struct procinfo
729 static struct procinfo * current_procinfo;
733 Looks up inferior_pid in the procinfo chain. Always returns a
734 struct procinfo *. If process can't be found, we error() out.
737 #define current_procinfo find_procinfo (inferior_pid, 0)
743 add_fd -- Add the fd to the poll/select list
747 static void add_fd (struct procinfo *);
751 Add the fd of the supplied procinfo to the list of fds used for
752 poll/select operations.
759 if (num_poll_list
<= 0)
760 poll_list
= (struct pollfd
*) xmalloc (sizeof (struct pollfd
));
762 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
764 * sizeof (struct pollfd
));
765 poll_list
[num_poll_list
].fd
= pi
->ctl_fd
;
767 poll_list
[num_poll_list
].events
= POLLWRNORM
;
769 poll_list
[num_poll_list
].events
= POLLPRI
;
779 remove_fd -- Remove the fd from the poll/select list
783 static void remove_fd (struct procinfo *);
787 Remove the fd of the supplied procinfo from the list of fds used
788 for poll/select operations.
797 for (i
= 0; i
< num_poll_list
; i
++)
799 if (poll_list
[i
].fd
== pi
->ctl_fd
)
801 if (i
!= num_poll_list
- 1)
802 memcpy (poll_list
+ i
, poll_list
+ i
+ 1,
803 (num_poll_list
- i
- 1) * sizeof (struct pollfd
));
807 if (num_poll_list
== 0)
810 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
812 * sizeof (struct pollfd
));
822 procfs_read_status - get procfs fd status
826 static int procfs_read_status (pi) struct procinfo *pi;
830 Given a pointer to a procinfo struct, get the status of
831 the status_fd in the appropriate way. Returns 0 on failure,
836 procfs_read_status (pi
)
839 #ifdef PROCFS_USE_READ_WRITE
840 if ((lseek (pi
->status_fd
, 0, SEEK_SET
) < 0) ||
841 (read (pi
->status_fd
, (char *) &pi
->prstatus
,
842 sizeof (gdb_prstatus_t
)) != sizeof (gdb_prstatus_t
)))
844 if (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
855 procfs_write_pcwstop - send a PCWSTOP to procfs fd
859 static int procfs_write_pcwstop (pi) struct procinfo *pi;
863 Given a pointer to a procinfo struct, send a PCWSTOP to
864 the ctl_fd in the appropriate way. Returns 0 on failure,
869 procfs_write_pcwstop (pi
)
872 #ifdef PROCFS_USE_READ_WRITE
874 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
876 if (ioctl (pi
->ctl_fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
887 procfs_write_pckill - send a kill to procfs fd
891 static void procfs_write_pckill (pi) struct procinfo *pi;
895 Given a pointer to a procinfo struct, send a kill to
896 the ctl_fd in the appropriate way. Returns 0 on failure,
901 procfs_write_pckill (pi
)
904 #ifdef PROCFS_USE_READ_WRITE
905 struct proc_ctl pctl
;
908 write (pi
->ctl_fd
, &pctl
, sizeof (struct proc_ctl
));
911 ioctl (pi
->ctl_fd
, PIOCKILL
, &signo
);
915 static struct procinfo
*
918 struct procinfo
*pi
, *next_pi
;
924 set_sigint_trap (); /* Causes SIGINT to be passed on to the
932 num_fds
= poll (poll_list
, num_poll_list
, -1);
935 if (num_fds
< 0 && errno
== EINTR
)
937 print_sys_errmsg ("poll failed", errno
);
938 error ("Poll failed, returned %d", num_fds
);
940 #else /* LOSING_POLL */
941 pi
= current_procinfo
;
943 while (!procfs_write_pcwstop (pi
))
947 /* Process exited. */
948 pi
->prstatus
.pr_flags
= 0;
951 else if (errno
!= EINTR
)
953 print_sys_errmsg (pi
->pathname
, errno
);
954 error ("procfs_write_pcwstop failed");
958 #endif /* LOSING_POLL */
960 clear_sigint_trap ();
965 for (i
= 0; i
< num_poll_list
&& num_fds
> 0; i
++)
967 if (0 == (poll_list
[i
].revents
&
968 (POLLWRNORM
| POLLPRI
| POLLERR
| POLLHUP
| POLLNVAL
)))
970 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
973 if (poll_list
[i
].fd
== pi
->ctl_fd
)
976 if ((poll_list
[i
].revents
& POLLHUP
) != 0 ||
977 !procfs_read_status(pi
))
978 { /* The LWP has apparently terminated. */
979 if (num_poll_list
<= 1)
981 pi
->prstatus
.pr_flags
= 0;
986 printf_filtered ("LWP %d exited.\n",
987 (pi
->pid
>> 16) & 0xffff);
988 close_proc_file (pi
);
989 i
--; /* don't skip deleted entry */
991 break; /* already another event to process */
993 goto wait_again
; /* wait for another event */
1000 error ("wait_fd: Couldn't find procinfo for fd %d\n",
1003 #endif /* LOSING_POLL */
1012 lookupdesc -- translate a value to a summary desc string
1016 static char *lookupdesc (struct trans *transp, unsigned int val);
1020 Given a pointer to a translation table and a value to be translated,
1021 lookup the desc string and return it.
1025 lookupdesc (transp
, val
)
1026 struct trans
*transp
;
1031 for (desc
= NULL
; transp
-> name
!= NULL
; transp
++)
1033 if (transp
-> value
== val
)
1035 desc
= transp
-> desc
;
1040 /* Didn't find a translation for the specified value, set a default one. */
1053 lookupname -- translate a value to symbolic name
1057 static char *lookupname (struct trans *transp, unsigned int val,
1062 Given a pointer to a translation table, a value to be translated,
1063 and a default prefix to return if the value can't be translated,
1064 match the value with one of the translation table entries and
1065 return a pointer to the symbolic name.
1067 If no match is found it just returns the value as a printable string,
1068 with the given prefix. The previous such value, if any, is freed
1073 lookupname (transp
, val
, prefix
)
1074 struct trans
*transp
;
1078 static char *locbuf
;
1081 for (name
= NULL
; transp
-> name
!= NULL
; transp
++)
1083 if (transp
-> value
== val
)
1085 name
= transp
-> name
;
1090 /* Didn't find a translation for the specified value, build a default
1091 one using the specified prefix and return it. The lifetime of
1092 the value is only until the next one is needed. */
1100 locbuf
= xmalloc (strlen (prefix
) + 16);
1101 sprintf (locbuf
, "%s %u", prefix
, val
);
1111 struct sigcode
*scp
;
1113 static char locbuf
[32];
1115 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1117 if ((scp
-> signo
== sip
-> si_signo
) &&
1118 (scp
-> code
== sip
-> si_code
))
1120 name
= scp
-> codename
;
1126 sprintf (locbuf
, "sigcode %u", sip
-> si_signo
);
1136 struct sigcode
*scp
;
1139 for (scp
= siginfo_table
; scp
-> codename
!= NULL
; scp
++)
1141 if ((scp
-> signo
== sip
-> si_signo
) &&
1142 (scp
-> code
== sip
-> si_code
))
1150 desc
= "Unrecognized signal or trap use";
1159 syscallname - translate a system call number into a system call name
1163 char *syscallname (int syscallnum)
1167 Given a system call number, translate it into the printable name
1168 of a system call, or into "syscall <num>" if it is an unknown
1173 syscallname (syscallnum
)
1176 static char locbuf
[32];
1178 if (syscallnum
>= 0 && syscallnum
< MAX_SYSCALLS
1179 && syscall_table
[syscallnum
] != NULL
)
1180 return syscall_table
[syscallnum
];
1183 sprintf (locbuf
, "syscall %u", syscallnum
);
1192 init_syscall_table - initialize syscall translation table
1196 void init_syscall_table (void)
1200 Dynamically initialize the translation table to convert system
1201 call numbers into printable system call names. Done once per
1202 gdb run, on initialization.
1206 This is awfully ugly, but preprocessor tricks to make it prettier
1207 tend to be nonportable.
1211 init_syscall_table ()
1213 #if defined (SYS_exit)
1214 syscall_table
[SYS_exit
] = "exit";
1216 #if defined (SYS_fork)
1217 syscall_table
[SYS_fork
] = "fork";
1219 #if defined (SYS_read)
1220 syscall_table
[SYS_read
] = "read";
1222 #if defined (SYS_write)
1223 syscall_table
[SYS_write
] = "write";
1225 #if defined (SYS_open)
1226 syscall_table
[SYS_open
] = "open";
1228 #if defined (SYS_close)
1229 syscall_table
[SYS_close
] = "close";
1231 #if defined (SYS_wait)
1232 syscall_table
[SYS_wait
] = "wait";
1234 #if defined (SYS_creat)
1235 syscall_table
[SYS_creat
] = "creat";
1237 #if defined (SYS_link)
1238 syscall_table
[SYS_link
] = "link";
1240 #if defined (SYS_unlink)
1241 syscall_table
[SYS_unlink
] = "unlink";
1243 #if defined (SYS_exec)
1244 syscall_table
[SYS_exec
] = "exec";
1246 #if defined (SYS_execv)
1247 syscall_table
[SYS_execv
] = "execv";
1249 #if defined (SYS_execve)
1250 syscall_table
[SYS_execve
] = "execve";
1252 #if defined (SYS_chdir)
1253 syscall_table
[SYS_chdir
] = "chdir";
1255 #if defined (SYS_time)
1256 syscall_table
[SYS_time
] = "time";
1258 #if defined (SYS_mknod)
1259 syscall_table
[SYS_mknod
] = "mknod";
1261 #if defined (SYS_chmod)
1262 syscall_table
[SYS_chmod
] = "chmod";
1264 #if defined (SYS_chown)
1265 syscall_table
[SYS_chown
] = "chown";
1267 #if defined (SYS_brk)
1268 syscall_table
[SYS_brk
] = "brk";
1270 #if defined (SYS_stat)
1271 syscall_table
[SYS_stat
] = "stat";
1273 #if defined (SYS_lseek)
1274 syscall_table
[SYS_lseek
] = "lseek";
1276 #if defined (SYS_getpid)
1277 syscall_table
[SYS_getpid
] = "getpid";
1279 #if defined (SYS_mount)
1280 syscall_table
[SYS_mount
] = "mount";
1282 #if defined (SYS_umount)
1283 syscall_table
[SYS_umount
] = "umount";
1285 #if defined (SYS_setuid)
1286 syscall_table
[SYS_setuid
] = "setuid";
1288 #if defined (SYS_getuid)
1289 syscall_table
[SYS_getuid
] = "getuid";
1291 #if defined (SYS_stime)
1292 syscall_table
[SYS_stime
] = "stime";
1294 #if defined (SYS_ptrace)
1295 syscall_table
[SYS_ptrace
] = "ptrace";
1297 #if defined (SYS_alarm)
1298 syscall_table
[SYS_alarm
] = "alarm";
1300 #if defined (SYS_fstat)
1301 syscall_table
[SYS_fstat
] = "fstat";
1303 #if defined (SYS_pause)
1304 syscall_table
[SYS_pause
] = "pause";
1306 #if defined (SYS_utime)
1307 syscall_table
[SYS_utime
] = "utime";
1309 #if defined (SYS_stty)
1310 syscall_table
[SYS_stty
] = "stty";
1312 #if defined (SYS_gtty)
1313 syscall_table
[SYS_gtty
] = "gtty";
1315 #if defined (SYS_access)
1316 syscall_table
[SYS_access
] = "access";
1318 #if defined (SYS_nice)
1319 syscall_table
[SYS_nice
] = "nice";
1321 #if defined (SYS_statfs)
1322 syscall_table
[SYS_statfs
] = "statfs";
1324 #if defined (SYS_sync)
1325 syscall_table
[SYS_sync
] = "sync";
1327 #if defined (SYS_kill)
1328 syscall_table
[SYS_kill
] = "kill";
1330 #if defined (SYS_fstatfs)
1331 syscall_table
[SYS_fstatfs
] = "fstatfs";
1333 #if defined (SYS_pgrpsys)
1334 syscall_table
[SYS_pgrpsys
] = "pgrpsys";
1336 #if defined (SYS_xenix)
1337 syscall_table
[SYS_xenix
] = "xenix";
1339 #if defined (SYS_dup)
1340 syscall_table
[SYS_dup
] = "dup";
1342 #if defined (SYS_pipe)
1343 syscall_table
[SYS_pipe
] = "pipe";
1345 #if defined (SYS_times)
1346 syscall_table
[SYS_times
] = "times";
1348 #if defined (SYS_profil)
1349 syscall_table
[SYS_profil
] = "profil";
1351 #if defined (SYS_plock)
1352 syscall_table
[SYS_plock
] = "plock";
1354 #if defined (SYS_setgid)
1355 syscall_table
[SYS_setgid
] = "setgid";
1357 #if defined (SYS_getgid)
1358 syscall_table
[SYS_getgid
] = "getgid";
1360 #if defined (SYS_signal)
1361 syscall_table
[SYS_signal
] = "signal";
1363 #if defined (SYS_msgsys)
1364 syscall_table
[SYS_msgsys
] = "msgsys";
1366 #if defined (SYS_sys3b)
1367 syscall_table
[SYS_sys3b
] = "sys3b";
1369 #if defined (SYS_sysi86)
1370 syscall_table
[SYS_sysi86
] = "sysi86";
1372 #if defined (SYS_acct)
1373 syscall_table
[SYS_acct
] = "acct";
1375 #if defined (SYS_shmsys)
1376 syscall_table
[SYS_shmsys
] = "shmsys";
1378 #if defined (SYS_semsys)
1379 syscall_table
[SYS_semsys
] = "semsys";
1381 #if defined (SYS_ioctl)
1382 syscall_table
[SYS_ioctl
] = "ioctl";
1384 #if defined (SYS_uadmin)
1385 syscall_table
[SYS_uadmin
] = "uadmin";
1387 #if defined (SYS_utssys)
1388 syscall_table
[SYS_utssys
] = "utssys";
1390 #if defined (SYS_fsync)
1391 syscall_table
[SYS_fsync
] = "fsync";
1393 #if defined (SYS_umask)
1394 syscall_table
[SYS_umask
] = "umask";
1396 #if defined (SYS_chroot)
1397 syscall_table
[SYS_chroot
] = "chroot";
1399 #if defined (SYS_fcntl)
1400 syscall_table
[SYS_fcntl
] = "fcntl";
1402 #if defined (SYS_ulimit)
1403 syscall_table
[SYS_ulimit
] = "ulimit";
1405 #if defined (SYS_rfsys)
1406 syscall_table
[SYS_rfsys
] = "rfsys";
1408 #if defined (SYS_rmdir)
1409 syscall_table
[SYS_rmdir
] = "rmdir";
1411 #if defined (SYS_mkdir)
1412 syscall_table
[SYS_mkdir
] = "mkdir";
1414 #if defined (SYS_getdents)
1415 syscall_table
[SYS_getdents
] = "getdents";
1417 #if defined (SYS_sysfs)
1418 syscall_table
[SYS_sysfs
] = "sysfs";
1420 #if defined (SYS_getmsg)
1421 syscall_table
[SYS_getmsg
] = "getmsg";
1423 #if defined (SYS_putmsg)
1424 syscall_table
[SYS_putmsg
] = "putmsg";
1426 #if defined (SYS_poll)
1427 syscall_table
[SYS_poll
] = "poll";
1429 #if defined (SYS_lstat)
1430 syscall_table
[SYS_lstat
] = "lstat";
1432 #if defined (SYS_symlink)
1433 syscall_table
[SYS_symlink
] = "symlink";
1435 #if defined (SYS_readlink)
1436 syscall_table
[SYS_readlink
] = "readlink";
1438 #if defined (SYS_setgroups)
1439 syscall_table
[SYS_setgroups
] = "setgroups";
1441 #if defined (SYS_getgroups)
1442 syscall_table
[SYS_getgroups
] = "getgroups";
1444 #if defined (SYS_fchmod)
1445 syscall_table
[SYS_fchmod
] = "fchmod";
1447 #if defined (SYS_fchown)
1448 syscall_table
[SYS_fchown
] = "fchown";
1450 #if defined (SYS_sigprocmask)
1451 syscall_table
[SYS_sigprocmask
] = "sigprocmask";
1453 #if defined (SYS_sigsuspend)
1454 syscall_table
[SYS_sigsuspend
] = "sigsuspend";
1456 #if defined (SYS_sigaltstack)
1457 syscall_table
[SYS_sigaltstack
] = "sigaltstack";
1459 #if defined (SYS_sigaction)
1460 syscall_table
[SYS_sigaction
] = "sigaction";
1462 #if defined (SYS_sigpending)
1463 syscall_table
[SYS_sigpending
] = "sigpending";
1465 #if defined (SYS_context)
1466 syscall_table
[SYS_context
] = "context";
1468 #if defined (SYS_evsys)
1469 syscall_table
[SYS_evsys
] = "evsys";
1471 #if defined (SYS_evtrapret)
1472 syscall_table
[SYS_evtrapret
] = "evtrapret";
1474 #if defined (SYS_statvfs)
1475 syscall_table
[SYS_statvfs
] = "statvfs";
1477 #if defined (SYS_fstatvfs)
1478 syscall_table
[SYS_fstatvfs
] = "fstatvfs";
1480 #if defined (SYS_nfssys)
1481 syscall_table
[SYS_nfssys
] = "nfssys";
1483 #if defined (SYS_waitsys)
1484 syscall_table
[SYS_waitsys
] = "waitsys";
1486 #if defined (SYS_sigsendsys)
1487 syscall_table
[SYS_sigsendsys
] = "sigsendsys";
1489 #if defined (SYS_hrtsys)
1490 syscall_table
[SYS_hrtsys
] = "hrtsys";
1492 #if defined (SYS_acancel)
1493 syscall_table
[SYS_acancel
] = "acancel";
1495 #if defined (SYS_async)
1496 syscall_table
[SYS_async
] = "async";
1498 #if defined (SYS_priocntlsys)
1499 syscall_table
[SYS_priocntlsys
] = "priocntlsys";
1501 #if defined (SYS_pathconf)
1502 syscall_table
[SYS_pathconf
] = "pathconf";
1504 #if defined (SYS_mincore)
1505 syscall_table
[SYS_mincore
] = "mincore";
1507 #if defined (SYS_mmap)
1508 syscall_table
[SYS_mmap
] = "mmap";
1510 #if defined (SYS_mprotect)
1511 syscall_table
[SYS_mprotect
] = "mprotect";
1513 #if defined (SYS_munmap)
1514 syscall_table
[SYS_munmap
] = "munmap";
1516 #if defined (SYS_fpathconf)
1517 syscall_table
[SYS_fpathconf
] = "fpathconf";
1519 #if defined (SYS_vfork)
1520 syscall_table
[SYS_vfork
] = "vfork";
1522 #if defined (SYS_fchdir)
1523 syscall_table
[SYS_fchdir
] = "fchdir";
1525 #if defined (SYS_readv)
1526 syscall_table
[SYS_readv
] = "readv";
1528 #if defined (SYS_writev)
1529 syscall_table
[SYS_writev
] = "writev";
1531 #if defined (SYS_xstat)
1532 syscall_table
[SYS_xstat
] = "xstat";
1534 #if defined (SYS_lxstat)
1535 syscall_table
[SYS_lxstat
] = "lxstat";
1537 #if defined (SYS_fxstat)
1538 syscall_table
[SYS_fxstat
] = "fxstat";
1540 #if defined (SYS_xmknod)
1541 syscall_table
[SYS_xmknod
] = "xmknod";
1543 #if defined (SYS_clocal)
1544 syscall_table
[SYS_clocal
] = "clocal";
1546 #if defined (SYS_setrlimit)
1547 syscall_table
[SYS_setrlimit
] = "setrlimit";
1549 #if defined (SYS_getrlimit)
1550 syscall_table
[SYS_getrlimit
] = "getrlimit";
1552 #if defined (SYS_lchown)
1553 syscall_table
[SYS_lchown
] = "lchown";
1555 #if defined (SYS_memcntl)
1556 syscall_table
[SYS_memcntl
] = "memcntl";
1558 #if defined (SYS_getpmsg)
1559 syscall_table
[SYS_getpmsg
] = "getpmsg";
1561 #if defined (SYS_putpmsg)
1562 syscall_table
[SYS_putpmsg
] = "putpmsg";
1564 #if defined (SYS_rename)
1565 syscall_table
[SYS_rename
] = "rename";
1567 #if defined (SYS_uname)
1568 syscall_table
[SYS_uname
] = "uname";
1570 #if defined (SYS_setegid)
1571 syscall_table
[SYS_setegid
] = "setegid";
1573 #if defined (SYS_sysconfig)
1574 syscall_table
[SYS_sysconfig
] = "sysconfig";
1576 #if defined (SYS_adjtime)
1577 syscall_table
[SYS_adjtime
] = "adjtime";
1579 #if defined (SYS_systeminfo)
1580 syscall_table
[SYS_systeminfo
] = "systeminfo";
1582 #if defined (SYS_seteuid)
1583 syscall_table
[SYS_seteuid
] = "seteuid";
1585 #if defined (SYS_sproc)
1586 syscall_table
[SYS_sproc
] = "sproc";
1588 #if defined (SYS_keyctl)
1589 syscall_table
[SYS_keyctl
] = "keyctl";
1591 #if defined (SYS_secsys)
1592 syscall_table
[SYS_secsys
] = "secsys";
1594 #if defined (SYS_filepriv)
1595 syscall_table
[SYS_filepriv
] = "filepriv";
1597 #if defined (SYS_procpriv)
1598 syscall_table
[SYS_procpriv
] = "procpriv";
1600 #if defined (SYS_devstat)
1601 syscall_table
[SYS_devstat
] = "devstat";
1603 #if defined (SYS_aclipc)
1604 syscall_table
[SYS_aclipc
] = "aclipc";
1606 #if defined (SYS_fdevstat)
1607 syscall_table
[SYS_fdevstat
] = "fdevstat";
1609 #if defined (SYS_flvlfile)
1610 syscall_table
[SYS_flvlfile
] = "flvlfile";
1612 #if defined (SYS_lvlfile)
1613 syscall_table
[SYS_lvlfile
] = "lvlfile";
1615 #if defined (SYS_lvlequal)
1616 syscall_table
[SYS_lvlequal
] = "lvlequal";
1618 #if defined (SYS_lvlproc)
1619 syscall_table
[SYS_lvlproc
] = "lvlproc";
1621 #if defined (SYS_lvlipc)
1622 syscall_table
[SYS_lvlipc
] = "lvlipc";
1624 #if defined (SYS_acl)
1625 syscall_table
[SYS_acl
] = "acl";
1627 #if defined (SYS_auditevt)
1628 syscall_table
[SYS_auditevt
] = "auditevt";
1630 #if defined (SYS_auditctl)
1631 syscall_table
[SYS_auditctl
] = "auditctl";
1633 #if defined (SYS_auditdmp)
1634 syscall_table
[SYS_auditdmp
] = "auditdmp";
1636 #if defined (SYS_auditlog)
1637 syscall_table
[SYS_auditlog
] = "auditlog";
1639 #if defined (SYS_auditbuf)
1640 syscall_table
[SYS_auditbuf
] = "auditbuf";
1642 #if defined (SYS_lvldom)
1643 syscall_table
[SYS_lvldom
] = "lvldom";
1645 #if defined (SYS_lvlvfs)
1646 syscall_table
[SYS_lvlvfs
] = "lvlvfs";
1648 #if defined (SYS_mkmld)
1649 syscall_table
[SYS_mkmld
] = "mkmld";
1651 #if defined (SYS_mldmode)
1652 syscall_table
[SYS_mldmode
] = "mldmode";
1654 #if defined (SYS_secadvise)
1655 syscall_table
[SYS_secadvise
] = "secadvise";
1657 #if defined (SYS_online)
1658 syscall_table
[SYS_online
] = "online";
1660 #if defined (SYS_setitimer)
1661 syscall_table
[SYS_setitimer
] = "setitimer";
1663 #if defined (SYS_getitimer)
1664 syscall_table
[SYS_getitimer
] = "getitimer";
1666 #if defined (SYS_gettimeofday)
1667 syscall_table
[SYS_gettimeofday
] = "gettimeofday";
1669 #if defined (SYS_settimeofday)
1670 syscall_table
[SYS_settimeofday
] = "settimeofday";
1672 #if defined (SYS_lwp_create)
1673 syscall_table
[SYS_lwp_create
] = "_lwp_create";
1675 #if defined (SYS_lwp_exit)
1676 syscall_table
[SYS_lwp_exit
] = "_lwp_exit";
1678 #if defined (SYS_lwp_wait)
1679 syscall_table
[SYS_lwp_wait
] = "_lwp_wait";
1681 #if defined (SYS_lwp_self)
1682 syscall_table
[SYS_lwp_self
] = "_lwp_self";
1684 #if defined (SYS_lwp_info)
1685 syscall_table
[SYS_lwp_info
] = "_lwp_info";
1687 #if defined (SYS_lwp_private)
1688 syscall_table
[SYS_lwp_private
] = "_lwp_private";
1690 #if defined (SYS_processor_bind)
1691 syscall_table
[SYS_processor_bind
] = "processor_bind";
1693 #if defined (SYS_processor_exbind)
1694 syscall_table
[SYS_processor_exbind
] = "processor_exbind";
1696 #if defined (SYS_prepblock)
1697 syscall_table
[SYS_prepblock
] = "prepblock";
1699 #if defined (SYS_block)
1700 syscall_table
[SYS_block
] = "block";
1702 #if defined (SYS_rdblock)
1703 syscall_table
[SYS_rdblock
] = "rdblock";
1705 #if defined (SYS_unblock)
1706 syscall_table
[SYS_unblock
] = "unblock";
1708 #if defined (SYS_cancelblock)
1709 syscall_table
[SYS_cancelblock
] = "cancelblock";
1711 #if defined (SYS_pread)
1712 syscall_table
[SYS_pread
] = "pread";
1714 #if defined (SYS_pwrite)
1715 syscall_table
[SYS_pwrite
] = "pwrite";
1717 #if defined (SYS_truncate)
1718 syscall_table
[SYS_truncate
] = "truncate";
1720 #if defined (SYS_ftruncate)
1721 syscall_table
[SYS_ftruncate
] = "ftruncate";
1723 #if defined (SYS_lwp_kill)
1724 syscall_table
[SYS_lwp_kill
] = "_lwp_kill";
1726 #if defined (SYS_sigwait)
1727 syscall_table
[SYS_sigwait
] = "sigwait";
1729 #if defined (SYS_fork1)
1730 syscall_table
[SYS_fork1
] = "fork1";
1732 #if defined (SYS_forkall)
1733 syscall_table
[SYS_forkall
] = "forkall";
1735 #if defined (SYS_modload)
1736 syscall_table
[SYS_modload
] = "modload";
1738 #if defined (SYS_moduload)
1739 syscall_table
[SYS_moduload
] = "moduload";
1741 #if defined (SYS_modpath)
1742 syscall_table
[SYS_modpath
] = "modpath";
1744 #if defined (SYS_modstat)
1745 syscall_table
[SYS_modstat
] = "modstat";
1747 #if defined (SYS_modadm)
1748 syscall_table
[SYS_modadm
] = "modadm";
1750 #if defined (SYS_getksym)
1751 syscall_table
[SYS_getksym
] = "getksym";
1753 #if defined (SYS_lwp_suspend)
1754 syscall_table
[SYS_lwp_suspend
] = "_lwp_suspend";
1756 #if defined (SYS_lwp_continue)
1757 syscall_table
[SYS_lwp_continue
] = "_lwp_continue";
1759 #if defined (SYS_priocntllst)
1760 syscall_table
[SYS_priocntllst
] = "priocntllst";
1762 #if defined (SYS_sleep)
1763 syscall_table
[SYS_sleep
] = "sleep";
1765 #if defined (SYS_lwp_sema_wait)
1766 syscall_table
[SYS_lwp_sema_wait
] = "_lwp_sema_wait";
1768 #if defined (SYS_lwp_sema_post)
1769 syscall_table
[SYS_lwp_sema_post
] = "_lwp_sema_post";
1771 #if defined (SYS_lwp_sema_trywait)
1772 syscall_table
[SYS_lwp_sema_trywait
] = "lwp_sema_trywait";
1774 #if defined(SYS_fstatvfs64)
1775 syscall_table
[SYS_fstatvfs64
] = "fstatvfs64";
1777 #if defined(SYS_statvfs64)
1778 syscall_table
[SYS_statvfs64
] = "statvfs64";
1780 #if defined(SYS_ftruncate64)
1781 syscall_table
[SYS_ftruncate64
] = "ftruncate64";
1783 #if defined(SYS_truncate64)
1784 syscall_table
[SYS_truncate64
] = "truncate64";
1786 #if defined(SYS_getrlimit64)
1787 syscall_table
[SYS_getrlimit64
] = "getrlimit64";
1789 #if defined(SYS_setrlimit64)
1790 syscall_table
[SYS_setrlimit64
] = "setrlimit64";
1792 #if defined(SYS_lseek64)
1793 syscall_table
[SYS_lseek64
] = "lseek64";
1795 #if defined(SYS_mmap64)
1796 syscall_table
[SYS_mmap64
] = "mmap64";
1798 #if defined(SYS_pread64)
1799 syscall_table
[SYS_pread64
] = "pread64";
1801 #if defined(SYS_creat64)
1802 syscall_table
[SYS_creat64
] = "creat64";
1804 #if defined(SYS_dshmsys)
1805 syscall_table
[SYS_dshmsys
] = "dshmsys";
1807 #if defined(SYS_invlpg)
1808 syscall_table
[SYS_invlpg
] = "invlpg";
1810 #if defined(SYS_cg_ids)
1811 syscall_table
[SYS_cg_ids
] = "cg_ids";
1813 #if defined(SYS_cg_processors)
1814 syscall_table
[SYS_cg_processors
] = "cg_processors";
1816 #if defined(SYS_cg_info)
1817 syscall_table
[SYS_cg_info
] = "cg_info";
1819 #if defined(SYS_cg_bind)
1820 syscall_table
[SYS_cg_bind
] = "cg_bind";
1822 #if defined(SYS_cg_current)
1823 syscall_table
[SYS_cg_current
] = "cg_current";
1825 #if defined(SYS_cg_memloc)
1826 syscall_table
[SYS_cg_memloc
] = "cg_memloc";
1834 procfs_kill_inferior - kill any current inferior
1838 void procfs_kill_inferior (void)
1842 Kill any current inferior.
1846 Kills even attached inferiors. Presumably the user has already
1847 been prompted that the inferior is an attached one rather than
1848 one started by gdb. (FIXME?)
1853 procfs_kill_inferior ()
1855 target_mourn_inferior ();
1862 unconditionally_kill_inferior - terminate the inferior
1866 static void unconditionally_kill_inferior (struct procinfo *)
1870 Kill the specified inferior.
1874 A possibly useful enhancement would be to first try sending
1875 the inferior a terminate signal, politely asking it to commit
1876 suicide, before we murder it (we could call that
1877 politely_kill_inferior()).
1882 unconditionally_kill_inferior (pi
)
1883 struct procinfo
*pi
;
1886 struct proc_ctl pctl
;
1888 ppid
= pi
->prstatus
.pr_ppid
;
1890 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
1891 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
1892 before the PIOCKILL, otherwise it might generate a corrupted core
1893 file for the inferior. */
1894 ioctl (pi
->ctl_fd
, PIOCSSIG
, NULL
);
1896 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
1897 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
1898 to kill the inferior, otherwise it might remain stopped with a
1900 We do not check the result of the PIOCSSIG, the inferior might have
1903 struct siginfo newsiginfo
;
1905 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
1906 newsiginfo
.si_signo
= SIGKILL
;
1907 newsiginfo
.si_code
= 0;
1908 newsiginfo
.si_errno
= 0;
1909 newsiginfo
.si_pid
= getpid ();
1910 newsiginfo
.si_uid
= getuid ();
1911 ioctl (pi
->ctl_fd
, PIOCSSIG
, &newsiginfo
);
1913 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1914 procfs_write_pckill (pi
);
1915 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
1917 close_proc_file (pi
);
1919 /* Only wait() for our direct children. Our grandchildren zombies are killed
1920 by the death of their parents. */
1922 if (ppid
== getpid())
1930 procfs_xfer_memory -- copy data to or from inferior memory space
1934 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1935 int dowrite, struct target_ops target)
1939 Copy LEN bytes to/from inferior's memory starting at MEMADDR
1940 from/to debugger memory starting at MYADDR. Copy from inferior
1941 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1943 Returns the length copied, which is either the LEN argument or
1944 zero. This xfer function does not do partial moves, since procfs_ops
1945 doesn't allow memory operations to cross below us in the target stack
1950 The /proc interface makes this an almost trivial task.
1954 procfs_xfer_memory (memaddr
, myaddr
, len
, dowrite
, target
)
1959 struct target_ops
*target
; /* ignored */
1962 struct procinfo
*pi
;
1964 pi
= current_procinfo
;
1966 if (lseek(pi
->as_fd
, (off_t
) memaddr
, SEEK_SET
) == (off_t
) memaddr
)
1970 nbytes
= write (pi
->as_fd
, myaddr
, len
);
1974 nbytes
= read (pi
->as_fd
, myaddr
, len
);
1988 procfs_store_registers -- copy register values back to inferior
1992 void procfs_store_registers (int regno)
1996 Store our current register values back into the inferior. If
1997 REGNO is -1 then store all the register, otherwise store just
1998 the value specified by REGNO.
2002 If we are storing only a single register, we first have to get all
2003 the current values from the process, overwrite the desired register
2004 in the gregset with the one we want from gdb's registers, and then
2005 send the whole set back to the process. For writing all the
2006 registers, all we have to do is generate the gregset and send it to
2009 Also note that the process has to be stopped on an event of interest
2010 for this to work, which basically means that it has to have been
2011 run under the control of one of the other /proc ioctl calls and not
2012 ptrace. Since we don't use ptrace anyway, we don't worry about this
2013 fine point, but it is worth noting for future reference.
2015 Gdb is confused about what this function is supposed to return.
2016 Some versions return a value, others return nothing. Some are
2017 declared to return a value and actually return nothing. Gdb ignores
2018 anything returned. (FIXME)
2023 procfs_store_registers (regno
)
2026 struct procinfo
*pi
;
2027 #ifdef PROCFS_USE_READ_WRITE
2028 struct greg_ctl greg
;
2029 struct fpreg_ctl fpreg
;
2032 pi
= current_procinfo
;
2034 #ifdef PROCFS_USE_READ_WRITE
2037 procfs_read_status (pi
);
2038 memcpy ((char *) &greg
.gregset
,
2039 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
,
2040 sizeof (gdb_gregset_t
));
2042 fill_gregset (&greg
.gregset
, regno
);
2044 write (pi
->ctl_fd
, &greg
, sizeof (greg
));
2045 #else /* PROCFS_USE_READ_WRITE */
2048 ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
);
2050 fill_gregset (&pi
->gregset
.gregset
, regno
);
2051 ioctl (pi
->ctl_fd
, PIOCSREG
, &pi
->gregset
.gregset
);
2052 #endif /* PROCFS_USE_READ_WRITE */
2054 #if defined (FP0_REGNUM)
2056 /* Now repeat everything using the floating point register set, if the
2057 target has floating point hardware. Since we ignore the returned value,
2058 we'll never know whether it worked or not anyway. */
2060 #ifdef PROCFS_USE_READ_WRITE
2063 procfs_read_status (pi
);
2064 memcpy ((char *) &fpreg
.fpregset
,
2065 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
,
2066 sizeof (gdb_fpregset_t
));
2068 fill_fpregset (&fpreg
.fpregset
, regno
);
2069 fpreg
.cmd
= PCSFPREG
;
2070 write (pi
->ctl_fd
, &fpreg
, sizeof (fpreg
));
2071 #else /* PROCFS_USE_READ_WRITE */
2074 ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
);
2076 fill_fpregset (&pi
->fpregset
.fpregset
, regno
);
2077 ioctl (pi
->ctl_fd
, PIOCSFPREG
, &pi
->fpregset
.fpregset
);
2078 #endif /* PROCFS_USE_READ_WRITE */
2080 #endif /* FP0_REGNUM */
2088 init_procinfo - setup a procinfo struct and connect it to a process
2092 struct procinfo * init_procinfo (int pid)
2096 Allocate a procinfo structure, open the /proc file and then set up the
2097 set of signals and faults that are to be traced. Returns a pointer to
2098 the new procinfo structure.
2102 If proc_init_failed ever gets called, control returns to the command
2103 processing loop via the standard error handling code.
2107 static struct procinfo
*
2108 init_procinfo (pid
, kill
)
2112 struct procinfo
*pi
= (struct procinfo
*)
2113 xmalloc (sizeof (struct procinfo
));
2114 struct sig_ctl sctl
;
2115 struct flt_ctl fctl
;
2117 memset ((char *) pi
, 0, sizeof (*pi
));
2118 if (!open_proc_file (pid
, pi
, O_RDWR
, 1))
2119 proc_init_failed (pi
, "can't open process file", kill
);
2121 /* open_proc_file may modify pid. */
2125 /* Add new process to process info list */
2127 pi
->next
= procinfo_list
;
2130 add_fd (pi
); /* Add to list for poll/select */
2132 /* Remember some things about the inferior that we will, or might, change
2133 so that we can restore them when we detach. */
2135 memcpy ((char *) &pi
->saved_trace
.sigset
,
2136 (char *) &pi
->prstatus
.pr_sigtrace
, sizeof (sigset_t
));
2137 memcpy ((char *) &pi
->saved_fltset
.fltset
,
2138 (char *) &pi
->prstatus
.pr_flttrace
, sizeof (fltset_t
));
2139 memcpy ((char *) &pi
->saved_entryset
.sysset
,
2140 (char *) &pi
->prstatus
.pr_sysentry
, sizeof (sysset_t
));
2141 memcpy ((char *) &pi
->saved_exitset
.sysset
,
2142 (char *) &pi
->prstatus
.pr_sysexit
, sizeof (sysset_t
));
2144 /* Set up trace and fault sets, as gdb expects them. */
2146 prfillset (&sctl
.sigset
);
2147 notice_signals (pi
, &sctl
);
2148 prfillset (&fctl
.fltset
);
2149 prdelset (&fctl
.fltset
, FLTPAGE
);
2151 #else /* ! UNIXWARE */
2152 ioctl (pi
->ctl_fd
, PIOCGTRACE
, &pi
->saved_trace
.sigset
);
2153 ioctl (pi
->ctl_fd
, PIOCGHOLD
, &pi
->saved_sighold
.sigset
);
2154 ioctl (pi
->ctl_fd
, PIOCGFAULT
, &pi
->saved_fltset
.fltset
);
2155 ioctl (pi
->ctl_fd
, PIOCGENTRY
, &pi
->saved_entryset
.sysset
);
2156 ioctl (pi
->ctl_fd
, PIOCGEXIT
, &pi
->saved_exitset
.sysset
);
2158 /* Set up trace and fault sets, as gdb expects them. */
2160 memset ((char *) &pi
->prrun
, 0, sizeof (pi
->prrun
));
2161 prfillset (&pi
->prrun
.pr_trace
);
2162 procfs_notice_signals (pid
);
2163 prfillset (&pi
->prrun
.pr_fault
);
2164 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
2165 #ifdef PROCFS_DONT_TRACE_FAULTS
2166 premptyset (&pi
->prrun
.pr_fault
);
2168 #endif /* UNIXWARE */
2170 if (!procfs_read_status (pi
))
2171 proc_init_failed (pi
, "procfs_read_status failed", kill
);
2180 create_procinfo - initialize access to a /proc entry
2184 struct procinfo * create_procinfo (int pid)
2188 Allocate a procinfo structure, open the /proc file and then set up the
2189 set of signals and faults that are to be traced. Returns a pointer to
2190 the new procinfo structure.
2194 If proc_init_failed ever gets called, control returns to the command
2195 processing loop via the standard error handling code.
2199 static struct procinfo
*
2200 create_procinfo (pid
)
2203 struct procinfo
*pi
;
2204 struct sig_ctl sctl
;
2205 struct flt_ctl fctl
;
2207 pi
= find_procinfo (pid
, 1);
2209 return pi
; /* All done! It already exists */
2211 pi
= init_procinfo (pid
, 1);
2214 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2215 already stopped, even if they all have PR_ASYNC set. */
2216 if (!(pi
->prstatus
.pr_flags
& PR_STOPPED
))
2218 if (!procfs_write_pcwstop (pi
))
2219 proc_init_failed (pi
, "procfs_write_pcwstop failed", 1);
2221 #ifdef PROCFS_USE_READ_WRITE
2222 fctl
.cmd
= PCSFAULT
;
2223 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
2224 proc_init_failed (pi
, "PCSFAULT failed", 1);
2226 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
) < 0)
2227 proc_init_failed (pi
, "PIOCSFAULT failed", 1);
2237 procfs_exit_handler - handle entry into the _exit syscall
2241 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2245 This routine is called when an inferior process enters the _exit()
2246 system call. It continues the process, and then collects the exit
2247 status and pid which are returned in *statvalp and *rtnvalp. After
2248 that it returns non-zero to indicate that procfs_wait should wake up.
2251 There is probably a better way to do this.
2256 procfs_exit_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2257 struct procinfo
*pi
;
2263 struct procinfo
*temp_pi
, *next_pi
;
2264 struct proc_ctl pctl
;
2268 pctl
.data
= PRCFAULT
;
2270 pi
->prrun
.pr_flags
= PRCFAULT
;
2273 #ifdef PROCFS_USE_READ_WRITE
2274 if (write (pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
2276 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2278 perror_with_name (pi
->pathname
);
2282 /* Claim it exited (don't call wait). */
2284 printf_filtered ("(attached process has exited)\n");
2286 *rtnvalp
= inferior_pid
;
2290 *rtnvalp
= wait (statvalp
);
2295 /* Close ALL open proc file handles,
2296 except the one that called SYS_exit. */
2297 for (temp_pi
= procinfo_list
; temp_pi
; temp_pi
= next_pi
)
2299 next_pi
= temp_pi
->next
;
2301 continue; /* Handled below */
2302 close_proc_file (temp_pi
);
2311 procfs_exec_handler - handle exit from the exec family of syscalls
2315 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2319 This routine is called when an inferior process is about to finish any
2320 of the exec() family of system calls. It pretends that we got a
2321 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2322 to tell procfs_wait to wake up.
2325 This need for compatibility with ptrace is questionable. In the
2326 future, it shouldn't be necessary.
2331 procfs_exec_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2332 struct procinfo
*pi
;
2338 *statvalp
= (SIGTRAP
<< 8) | 0177;
2343 #if defined(SYS_sproc) && !defined(UNIXWARE)
2344 /* IRIX lwp creation system call */
2350 procfs_sproc_handler - handle exit from the sproc syscall
2354 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2358 This routine is called when an inferior process is about to finish an
2359 sproc() system call. This is the system call that IRIX uses to create
2360 a lightweight process. When the target process gets this event, we can
2361 look at rval1 to find the new child processes ID, and create a new
2362 procinfo struct from that.
2364 After that, it pretends that we got a SIGTRAP, and returns non-zero
2365 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2366 woken up, sees the new process and continues it.
2369 We actually never see the child exiting from sproc because we will
2370 shortly stop the child with PIOCSTOP, which is then registered as the
2375 procfs_sproc_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2376 struct procinfo
*pi
;
2382 /* We've just detected the completion of an sproc system call. Now we need to
2383 setup a procinfo struct for this thread, and notify the thread system of the
2386 /* If sproc failed, then nothing interesting happened. Continue the process
2387 and go back to sleep. */
2389 if (pi
->prstatus
.pr_errno
!= 0)
2391 pi
->prrun
.pr_flags
&= PRSTEP
;
2392 pi
->prrun
.pr_flags
|= PRCFAULT
;
2394 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2395 perror_with_name (pi
->pathname
);
2400 /* At this point, the new thread is stopped at it's first instruction, and
2401 the parent is stopped at the exit from sproc. */
2403 /* Notify the caller of the arrival of a new thread. */
2404 create_procinfo (pi
->prstatus
.pr_rval1
);
2406 *rtnvalp
= pi
->prstatus
.pr_rval1
;
2407 *statvalp
= (SIGTRAP
<< 8) | 0177;
2416 procfs_fork_handler - handle exit from the fork syscall
2420 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2424 This routine is called when an inferior process is about to finish a
2425 fork() system call. We will open up the new process, and then close
2426 it, which releases it from the clutches of the debugger.
2428 After that, we continue the target process as though nothing had
2432 This is necessary for IRIX because we have to set PR_FORK in order
2433 to catch the creation of lwps (via sproc()). When an actual fork
2434 occurs, it becomes necessary to reset the forks debugger flags and
2435 continue it because we can't hack multiple processes yet.
2439 procfs_fork_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2440 struct procinfo
*pi
;
2446 struct procinfo
*pitemp
;
2448 /* At this point, we've detected the completion of a fork (or vfork) call in
2449 our child. The grandchild is also stopped because we set inherit-on-fork
2450 earlier. (Note that nobody has the grandchilds' /proc file open at this
2451 point.) We will release the grandchild from the debugger by opening it's
2452 /proc file and then closing it. Since run-on-last-close is set, the
2453 grandchild continues on its' merry way. */
2456 pitemp
= create_procinfo (pi
->prstatus
.pr_rval1
);
2458 close_proc_file (pitemp
);
2460 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2461 perror_with_name (pi
->pathname
);
2465 #endif /* SYS_sproc && !UNIXWARE */
2471 procfs_set_inferior_syscall_traps - setup the syscall traps
2475 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2479 Called for each "procinfo" (process, thread, or LWP) in the
2480 inferior, to register for notification of and handlers for
2481 syscall traps in the inferior.
2486 procfs_set_inferior_syscall_traps (pip
)
2487 struct procinfo
*pip
;
2489 procfs_set_syscall_trap (pip
, SYS_exit
, PROCFS_SYSCALL_ENTRY
,
2490 procfs_exit_handler
);
2492 #ifndef PRFS_STOPEXEC
2494 procfs_set_syscall_trap (pip
, SYS_exec
, PROCFS_SYSCALL_EXIT
,
2495 procfs_exec_handler
);
2498 procfs_set_syscall_trap (pip
, SYS_execv
, PROCFS_SYSCALL_EXIT
,
2499 procfs_exec_handler
);
2502 procfs_set_syscall_trap (pip
, SYS_execve
, PROCFS_SYSCALL_EXIT
,
2503 procfs_exec_handler
);
2505 #endif /* PRFS_STOPEXEC */
2507 /* Setup traps on exit from sproc() */
2510 procfs_set_syscall_trap (pip
, SYS_sproc
, PROCFS_SYSCALL_EXIT
,
2511 procfs_sproc_handler
);
2512 procfs_set_syscall_trap (pip
, SYS_fork
, PROCFS_SYSCALL_EXIT
,
2513 procfs_fork_handler
);
2515 procfs_set_syscall_trap (pip
, SYS_vfork
, PROCFS_SYSCALL_EXIT
,
2516 procfs_fork_handler
);
2518 /* Turn on inherit-on-fork flag so that all children of the target process
2519 start with tracing flags set. This allows us to trap lwp creation. Note
2520 that we also have to trap on fork and vfork in order to disable all tracing
2521 in the targets child processes. */
2523 modify_inherit_on_fork_flag (pip
->ctl_fd
, 1);
2526 #ifdef SYS_lwp_create
2527 procfs_set_syscall_trap (pip
, SYS_lwp_create
, PROCFS_SYSCALL_EXIT
,
2528 procfs_lwp_creation_handler
);
2536 procfs_init_inferior - initialize target vector and access to a
2541 void procfs_init_inferior (int pid)
2545 When gdb starts an inferior, this function is called in the parent
2546 process immediately after the fork. It waits for the child to stop
2547 on the return from the exec system call (the child itself takes care
2548 of ensuring that this is set up), then sets up the set of signals
2549 and faults that are to be traced. Returns the pid, which may have had
2550 the thread-id added to it.
2554 If proc_init_failed ever gets called, control returns to the command
2555 processing loop via the standard error handling code.
2560 procfs_init_inferior (pid
)
2563 struct procinfo
*pip
;
2565 push_target (&procfs_ops
);
2567 pip
= create_procinfo (pid
);
2569 procfs_set_inferior_syscall_traps (pip
);
2571 /* create_procinfo may change the pid, so we have to update inferior_pid
2572 here before calling other gdb routines that need the right pid. */
2577 add_thread (pip
-> pid
); /* Setup initial thread */
2579 #ifdef START_INFERIOR_TRAPS_EXPECTED
2580 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
2582 /* One trap to exec the shell, one to exec the program being debugged. */
2583 startup_inferior (2);
2591 procfs_notice_signals
2595 static void procfs_notice_signals (int pid);
2599 When the user changes the state of gdb's signal handling via the
2600 "handle" command, this function gets called to see if any change
2601 in the /proc interface is required. It is also called internally
2602 by other /proc interface functions to initialize the state of
2603 the traced signal set.
2605 One thing it does is that signals for which the state is "nostop",
2606 "noprint", and "pass", have their trace bits reset in the pr_trace
2607 field, so that they are no longer traced. This allows them to be
2608 delivered directly to the inferior without the debugger ever being
2613 procfs_notice_signals (pid
)
2616 struct procinfo
*pi
;
2617 struct sig_ctl sctl
;
2619 pi
= find_procinfo (pid
, 0);
2621 #ifndef HAVE_PRRUN_T
2622 premptyset (&sctl
.sigset
);
2624 sctl
.sigset
= pi
->prrun
.pr_trace
;
2627 notice_signals (pi
, &sctl
);
2630 pi
->prrun
.pr_trace
= sctl
.sigset
;
2635 notice_signals (pi
, sctl
)
2636 struct procinfo
*pi
;
2637 struct sig_ctl
*sctl
;
2641 for (signo
= 0; signo
< NSIG
; signo
++)
2643 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
2644 signal_print_state (target_signal_from_host (signo
)) == 0 &&
2645 signal_pass_state (target_signal_from_host (signo
)) == 1)
2647 prdelset (&sctl
->sigset
, signo
);
2651 praddset (&sctl
->sigset
, signo
);
2654 #ifdef PROCFS_USE_READ_WRITE
2655 sctl
->cmd
= PCSTRACE
;
2656 if (write (pi
->ctl_fd
, (char *) sctl
, sizeof (struct sig_ctl
)) < 0)
2658 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &sctl
->sigset
))
2661 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2669 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2673 void proc_set_exec_trap (void)
2677 This function is called in the child process when starting up
2678 an inferior, prior to doing the exec of the actual inferior.
2679 It sets the child process's exitset to make exit from the exec
2680 system call an event of interest to stop on, and then simply
2681 returns. The child does the exec, the system call returns, and
2682 the child stops at the first instruction, ready for the gdb
2683 parent process to take control of it.
2687 We need to use all local variables since the child may be sharing
2688 it's data space with the parent, if vfork was used rather than
2691 Also note that we want to turn off the inherit-on-fork flag in
2692 the child process so that any grand-children start with all
2693 tracing flags cleared.
2697 proc_set_exec_trap ()
2699 struct sys_ctl exitset
;
2700 struct sys_ctl entryset
;
2701 char procname
[MAX_PROC_NAME_SIZE
];
2704 sprintf (procname
, CTL_PROC_NAME_FMT
, getpid ());
2706 if ((fd
= open (procname
, O_WRONLY
)) < 0)
2708 if ((fd
= open (procname
, O_RDWR
)) < 0)
2712 gdb_flush (gdb_stderr
);
2715 premptyset (&exitset
.sysset
);
2716 premptyset (&entryset
.sysset
);
2718 #ifdef PRFS_STOPEXEC
2719 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2720 exits from exec system calls because of the user level loader. */
2724 if (ioctl (fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
2727 gdb_flush (gdb_stderr
);
2730 prfs_flags
|= PRFS_STOPEXEC
;
2731 if (ioctl (fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
2734 gdb_flush (gdb_stderr
);
2738 #else /* PRFS_STOPEXEC */
2740 Not all systems with /proc have all the exec* syscalls with the same
2741 names. On the SGI, for example, there is no SYS_exec, but there
2742 *is* a SYS_execv. So, we try to account for that. */
2745 praddset (&exitset
.sysset
, SYS_exec
);
2748 praddset (&exitset
.sysset
, SYS_execve
);
2751 praddset (&exitset
.sysset
, SYS_execv
);
2754 #ifdef PROCFS_USE_READ_WRITE
2755 exitset
.cmd
= PCSEXIT
;
2756 if (write (fd
, (char *) &exitset
, sizeof (struct sys_ctl
)) < 0)
2758 if (ioctl (fd
, PIOCSEXIT
, &exitset
.sysset
) < 0)
2762 gdb_flush (gdb_stderr
);
2765 #endif /* PRFS_STOPEXEC */
2767 praddset (&entryset
.sysset
, SYS_exit
);
2769 #ifdef PROCFS_USE_READ_WRITE
2770 entryset
.cmd
= PCSENTRY
;
2771 if (write (fd
, (char *) &entryset
, sizeof (struct sys_ctl
)) < 0)
2773 if (ioctl (fd
, PIOCSENTRY
, &entryset
.sysset
) < 0)
2777 gdb_flush (gdb_stderr
);
2781 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2782 start with tracing flags cleared. */
2784 modify_inherit_on_fork_flag (fd
, 0);
2786 /* Turn on run-on-last-close flag so that this process will not hang
2787 if GDB goes away for some reason. */
2789 modify_run_on_last_close_flag (fd
, 1);
2791 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2792 /* NOTE: revisit when doing thread support for UW */
2796 struct proc_ctl pctl
;
2798 /* Solaris needs this to make procfs treat all threads seperately. Without
2799 this, all threads halt whenever something happens to any thread. Since
2800 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2802 pr_flags
= PR_ASYNC
;
2803 #ifdef PROCFS_USE_READ_WRITE
2805 pctl
.data
= PR_FORK
|PR_ASYNC
;
2806 write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
));
2808 ioctl (fd
, PIOCSET
, &pr_flags
);
2811 #endif /* PR_ASYNC */
2812 #endif /* !UNIXWARE */
2819 proc_iterate_over_mappings -- call function for every mapped space
2823 int proc_iterate_over_mappings (int (*func)())
2827 Given a pointer to a function, call that function for every
2828 mapped address space, passing it an open file descriptor for
2829 the file corresponding to that mapped address space (if any)
2830 and the base address of the mapped space. Quit when we hit
2831 the end of the mappings or the function returns nonzero.
2836 proc_iterate_over_mappings (func
)
2837 int (*func
) PARAMS ((int, CORE_ADDR
));
2844 struct procinfo
*pi
;
2847 pi
= current_procinfo
;
2849 if (fstat (pi
->map_fd
, &sbuf
) < 0)
2852 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
2853 prmaps
= (prmap_t
*) alloca (nmap
* sizeof(prmap_t
));
2854 if ((lseek (pi
->map_fd
, 0, SEEK_SET
) == 0) &&
2855 (read (pi
->map_fd
, (char *) prmaps
, nmap
* sizeof (prmap_t
)) ==
2856 (nmap
* sizeof (prmap_t
))))
2859 for (prmap
= prmaps
; i
< nmap
&& funcstat
== 0; ++prmap
, ++i
)
2861 char name
[sizeof ("/proc/1234567890/object") +
2862 sizeof (prmap
->pr_mapname
)];
2863 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, prmap
->pr_mapname
);
2864 if ((fd
= open (name
, O_RDONLY
)) == -1)
2869 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
->pr_vaddr
);
2875 #else /* UNIXWARE */
2877 proc_iterate_over_mappings (func
)
2878 int (*func
) PARAMS ((int, CORE_ADDR
));
2883 struct prmap
*prmaps
;
2884 struct prmap
*prmap
;
2885 struct procinfo
*pi
;
2887 pi
= current_procinfo
;
2889 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2891 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2892 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2894 for (prmap
= prmaps
; prmap
-> pr_size
&& funcstat
== 0; ++prmap
)
2896 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
-> pr_vaddr
, 0);
2897 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
-> pr_vaddr
);
2904 #endif /* UNIXWARE */
2906 #if 0 /* Currently unused */
2911 proc_base_address -- find base address for segment containing address
2915 CORE_ADDR proc_base_address (CORE_ADDR addr)
2919 Given an address of a location in the inferior, find and return
2920 the base address of the mapped segment containing that address.
2922 This is used for example, by the shared library support code,
2923 where we have the pc value for some location in the shared library
2924 where we are stopped, and need to know the base address of the
2925 segment containing that address.
2929 proc_base_address (addr
)
2933 struct prmap
*prmaps
;
2934 struct prmap
*prmap
;
2935 CORE_ADDR baseaddr
= 0;
2936 struct procinfo
*pi
;
2938 pi
= current_procinfo
;
2940 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
2942 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
2943 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
2945 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
2947 if ((prmap
-> pr_vaddr
<= (caddr_t
) addr
) &&
2948 (prmap
-> pr_vaddr
+ prmap
-> pr_size
> (caddr_t
) addr
))
2950 baseaddr
= (CORE_ADDR
) prmap
-> pr_vaddr
;
2966 proc_address_to_fd -- return open fd for file mapped to address
2970 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
2974 Given an address in the current inferior's address space, use the
2975 /proc interface to find an open file descriptor for the file that
2976 this address was mapped in from. Return -1 if there is no current
2977 inferior. Print a warning message if there is an inferior but
2978 the address corresponds to no file (IE a bogus address).
2983 proc_address_to_fd (pi
, addr
, complain
)
2984 struct procinfo
*pi
;
2990 if ((fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, (caddr_t
*) &addr
)) < 0)
2994 print_sys_errmsg (pi
->pathname
, errno
);
2995 warning ("can't find mapped file for address 0x%x", addr
);
3000 #endif /* !UNIXWARE */
3002 /* Attach to process PID, then initialize for debugging it
3003 and wait for the trace-trap that results from attaching. */
3006 procfs_attach (args
, from_tty
)
3014 error_no_arg ("process-id to attach");
3018 if (pid
== getpid()) /* Trying to masturbate? */
3019 error ("I refuse to debug myself!");
3023 exec_file
= (char *) get_exec_file (0);
3026 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
3028 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid
));
3030 gdb_flush (gdb_stdout
);
3033 inferior_pid
= pid
= do_attach (pid
);
3034 push_target (&procfs_ops
);
3038 /* Take a program previously attached to and detaches it.
3039 The program resumes execution and will no longer stop
3040 on signals, etc. We'd better not have left any breakpoints
3041 in the program or it'll die when it hits one. For this
3042 to work, it may be necessary for the process to have been
3043 previously attached. It *might* work if the program was
3044 started via the normal ptrace (PTRACE_TRACEME). */
3047 procfs_detach (args
, from_tty
)
3055 char *exec_file
= get_exec_file (0);
3058 printf_unfiltered ("Detaching from program: %s %s\n",
3059 exec_file
, target_pid_to_str (inferior_pid
));
3060 gdb_flush (gdb_stdout
);
3063 siggnal
= atoi (args
);
3065 do_detach (siggnal
);
3067 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
3070 /* Get ready to modify the registers array. On machines which store
3071 individual registers, this doesn't need to do anything. On machines
3072 which store all the registers in one fell swoop, this makes sure
3073 that registers contains all the registers from the program being
3077 procfs_prepare_to_store ()
3079 #ifdef CHILD_PREPARE_TO_STORE
3080 CHILD_PREPARE_TO_STORE ();
3084 /* Print status information about what we're accessing. */
3087 procfs_files_info (ignore
)
3088 struct target_ops
*ignore
;
3090 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3091 attach_flag
? "attached": "child", target_pid_to_str (inferior_pid
));
3096 procfs_open (arg
, from_tty
)
3100 error ("Use the \"run\" command to start a Unix child process.");
3107 do_attach -- attach to an already existing process
3111 int do_attach (int pid)
3115 Attach to an already existing process with the specified process
3116 id. If the process is not already stopped, query whether to
3121 The option of stopping at attach time is specific to the /proc
3122 versions of gdb. Versions using ptrace force the attachee
3123 to stop. (I have changed this version to do so, too. All you
3124 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3132 struct procinfo
*pi
;
3133 struct sig_ctl sctl
;
3134 struct flt_ctl fctl
;
3137 pi
= init_procinfo (pid
, 0);
3140 nlwp
= pi
->prstatus
.pr_nlwp
;
3141 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (id_t
));
3143 if (ioctl (pi
->ctl_fd
, PIOCLWPIDS
, lwps
))
3145 print_sys_errmsg (pi
-> pathname
, errno
);
3146 error ("PIOCLWPIDS failed");
3148 #else /* PIOCLWPIDS */
3150 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
3153 for (; nlwp
> 0; nlwp
--, lwps
++)
3155 /* First one has already been created above. */
3156 if ((pi
= find_procinfo ((*lwps
<< 16) | pid
, 1)) == 0)
3157 pi
= init_procinfo ((*lwps
<< 16) | pid
, 0);
3159 if (THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3161 pi
->was_stopped
= 1;
3165 pi
->was_stopped
= 0;
3166 if (1 || query ("Process is currently running, stop it? "))
3169 /* Make it run again when we close it. */
3170 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3171 #ifdef PROCFS_USE_READ_WRITE
3173 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3175 if (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
3178 print_sys_errmsg (pi
->pathname
, errno
);
3179 close_proc_file (pi
);
3180 error ("PIOCSTOP failed");
3183 if (!procfs_read_status (pi
))
3185 print_sys_errmsg (pi
->pathname
, errno
);
3186 close_proc_file (pi
);
3187 error ("procfs_read_status failed");
3190 pi
->nopass_next_sigstop
= 1;
3194 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3195 target_pid_to_str (pi
->pid
));
3199 #ifdef PROCFS_USE_READ_WRITE
3200 fctl
.cmd
= PCSFAULT
;
3201 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
3202 print_sys_errmsg ("PCSFAULT failed", errno
);
3203 #else /* PROCFS_USE_READ_WRITE */
3204 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
3206 print_sys_errmsg ("PIOCSFAULT failed", errno
);
3208 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
3210 print_sys_errmsg ("PIOCSTRACE failed", errno
);
3212 add_thread (pi
->pid
);
3213 procfs_set_inferior_syscall_traps (pi
);
3214 #endif /* PROCFS_USE_READ_WRITE */
3224 do_detach -- detach from an attached-to process
3228 void do_detach (int signal)
3232 Detach from the current attachee.
3234 If signal is non-zero, the attachee is started running again and sent
3235 the specified signal.
3237 If signal is zero and the attachee was not already stopped when we
3238 attached to it, then we make it runnable again when we detach.
3240 Otherwise, we query whether or not to make the attachee runnable
3241 again, since we may simply want to leave it in the state it was in
3244 We report any problems, but do not consider them errors, since we
3245 MUST detach even if some things don't seem to go right. This may not
3246 be the ideal situation. (FIXME).
3253 struct procinfo
*pi
;
3255 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3259 set_proc_siginfo (pi
, signal
);
3261 #ifdef PROCFS_USE_READ_WRITE
3262 pi
->saved_exitset
.cmd
= PCSEXIT
;
3263 if (write (pi
->ctl_fd
, (char *) &pi
->saved_exitset
,
3264 sizeof (struct sys_ctl
)) < 0)
3266 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &pi
->saved_exitset
.sysset
) < 0)
3269 print_sys_errmsg (pi
->pathname
, errno
);
3270 printf_unfiltered ("PIOCSEXIT failed.\n");
3272 #ifdef PROCFS_USE_READ_WRITE
3273 pi
->saved_entryset
.cmd
= PCSENTRY
;
3274 if (write (pi
->ctl_fd
, (char *) &pi
->saved_entryset
,
3275 sizeof (struct sys_ctl
)) < 0)
3277 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &pi
->saved_entryset
.sysset
) < 0)
3280 print_sys_errmsg (pi
->pathname
, errno
);
3281 printf_unfiltered ("PIOCSENTRY failed.\n");
3283 #ifdef PROCFS_USE_READ_WRITE
3284 pi
->saved_trace
.cmd
= PCSTRACE
;
3285 if (write (pi
->ctl_fd
, (char *) &pi
->saved_trace
,
3286 sizeof (struct sig_ctl
)) < 0)
3288 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->saved_trace
.sigset
) < 0)
3291 print_sys_errmsg (pi
->pathname
, errno
);
3292 printf_unfiltered ("PIOCSTRACE failed.\n");
3295 if (ioctl (pi
->ctl_fd
, PIOCSHOLD
, &pi
->saved_sighold
.sigset
) < 0)
3297 print_sys_errmsg (pi
->pathname
, errno
);
3298 printf_unfiltered ("PIOSCHOLD failed.\n");
3301 #ifdef PROCFS_USE_READ_WRITE
3302 pi
->saved_fltset
.cmd
= PCSFAULT
;
3303 if (write (pi
->ctl_fd
, (char *) &pi
->saved_fltset
,
3304 sizeof (struct flt_ctl
)) < 0)
3306 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->saved_fltset
.fltset
) < 0)
3309 print_sys_errmsg (pi
->pathname
, errno
);
3310 printf_unfiltered ("PIOCSFAULT failed.\n");
3312 if (!procfs_read_status (pi
))
3314 print_sys_errmsg (pi
->pathname
, errno
);
3315 printf_unfiltered ("procfs_read_status failed.\n");
3320 || (THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3323 struct proc_ctl pctl
;
3325 if (signal
|| !pi
->was_stopped
||
3326 query ("Was stopped when attached, make it runnable again? "))
3328 /* Clear any pending signal if we want to detach without
3331 set_proc_siginfo (pi
, signal
);
3333 /* Clear any fault that might have stopped it. */
3334 #ifdef PROCFS_USE_READ_WRITE
3336 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3338 if (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0))
3341 print_sys_errmsg (pi
->pathname
, errno
);
3342 printf_unfiltered ("PIOCCFAULT failed.\n");
3345 /* Make it run again when we close it. */
3347 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3351 close_proc_file (pi
);
3356 /* emulate wait() as much as possible.
3357 Wait for child to do something. Return pid of child, or -1 in case
3358 of error; store status in *OURSTATUS.
3360 Not sure why we can't
3361 just use wait(), but it seems to have problems when applied to a
3362 process being controlled with the /proc interface.
3364 We have a race problem here with no obvious solution. We need to let
3365 the inferior run until it stops on an event of interest, which means
3366 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3367 ioctl if the process is already stopped on something that is not an
3368 event of interest, or the call will hang indefinitely. Thus we first
3369 use PIOCSTATUS to see if the process is not stopped. If not, then we
3370 use PIOCWSTOP. But during the window between the two, if the process
3371 stops for any reason that is not an event of interest (such as a job
3372 control signal) then gdb will hang. One possible workaround is to set
3373 an alarm to wake up every minute of so and check to see if the process
3374 is still running, and if so, then reissue the PIOCWSTOP. But this is
3375 a real kludge, so has not been implemented. FIXME: investigate
3378 FIXME: Investigate why wait() seems to have problems with programs
3379 being control by /proc routines. */
3381 procfs_wait (pid
, ourstatus
)
3383 struct target_waitstatus
*ourstatus
;
3390 struct procinfo
*pi
;
3391 struct proc_ctl pctl
;
3395 /* handle all syscall events first, otherwise we might not
3396 notice a thread was created until too late. */
3398 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3403 if (! (THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)) )
3406 why
= THE_PR_LWP(pi
->prstatus
).pr_why
;
3407 what
= THE_PR_LWP(pi
->prstatus
).pr_what
;
3408 if (why
== PR_SYSENTRY
|| why
== PR_SYSEXIT
)
3411 int found_handler
= 0;
3413 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
3414 if (pi
->syscall_handlers
[i
].syscall_num
== what
)
3417 pi
->saved_rtnval
= pi
->pid
;
3418 pi
->saved_statval
= 0;
3419 if (!pi
->syscall_handlers
[i
].func
3420 (pi
, what
, why
, &pi
->saved_rtnval
, &pi
->saved_statval
))
3427 if (why
== PR_SYSENTRY
)
3428 error ("PR_SYSENTRY, unhandled system call %d", what
);
3430 error ("PR_SYSEXIT, unhandled system call %d", what
);
3435 /* find a relevant process with an event */
3437 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3438 if (pi
->had_event
&& (pid
== -1 || pi
->pid
== pid
))
3448 && !(THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3450 if (!procfs_write_pcwstop (pi
))
3457 if (errno
== ENOENT
)
3459 /* XXX Fixme -- what to do if attached? Can't call wait... */
3460 rtnval
= wait (&statval
);
3461 if ((rtnval
) != (PIDGET (inferior_pid
)))
3463 print_sys_errmsg (pi
->pathname
, errno
);
3464 error ("procfs_wait: wait failed, returned %d", rtnval
);
3470 print_sys_errmsg (pi
->pathname
, errno
);
3471 error ("PIOCSTATUS or PIOCWSTOP failed.");
3475 else if (THE_PR_LWP(pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3478 rtnval
= pi
->prstatus
.pr_pid
;
3482 why
= THE_PR_LWP(pi
->prstatus
).pr_why
;
3483 what
= THE_PR_LWP(pi
->prstatus
).pr_what
;
3488 statval
= (what
<< 8) | 0177;
3492 rtnval
= pi
->saved_rtnval
;
3493 statval
= pi
->saved_statval
;
3496 statval
= (SIGSTOP
<< 8) | 0177;
3499 statval
= (what
<< 8) | 0177;
3506 statval
= (SIGTRAP
<< 8) | 0177;
3511 statval
= (SIGTRAP
<< 8) | 0177;
3514 #ifndef FAULTED_USE_SIGINFO
3515 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3516 Solaris fills in si_signo. I'm not sure about others. */
3519 statval
= (SIGILL
<< 8) | 0177;
3523 statval
= (SIGTRAP
<< 8) | 0177;
3528 statval
= (SIGSEGV
<< 8) | 0177;
3533 statval
= (SIGFPE
<< 8) | 0177;
3535 case FLTPAGE
: /* Recoverable page fault */
3536 #endif /* not FAULTED_USE_SIGINFO */
3538 /* Use the signal which the kernel assigns. This is better than
3539 trying to second-guess it from the fault. In fact, I suspect
3540 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3542 ((THE_PR_LWP(pi
->prstatus
).pr_info
.si_signo
) << 8) | 0177;
3547 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
3549 /* Stop all the other threads when any of them stops. */
3552 struct procinfo
*procinfo
, *next_pi
;
3554 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3556 next_pi
= procinfo
->next
;
3557 if (!procinfo
->had_event
)
3559 #ifdef PROCFS_USE_READ_WRITE
3561 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3563 print_sys_errmsg (procinfo
->pathname
, errno
);
3564 error ("PCSTOP failed");
3567 /* A bug in Solaris (2.5) causes us to hang when trying to
3568 stop a stopped process. So, we have to check first in
3569 order to avoid the hang. */
3570 if (!procfs_read_status (procinfo
))
3572 /* The LWP has apparently terminated. */
3574 printf_filtered ("LWP %d doesn't respond.\n",
3575 (procinfo
->pid
>> 16) & 0xffff);
3576 close_proc_file (procinfo
);
3580 if (!(procinfo
->prstatus
.pr_flags
& PR_STOPPED
))
3581 if (ioctl (procinfo
->ctl_fd
, PIOCSTOP
, &procinfo
->prstatus
)
3584 print_sys_errmsg (procinfo
->pathname
, errno
);
3585 warning ("PIOCSTOP failed");
3594 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3595 THE_PR_LWP(pi
->prstatus
).pr_flags
);
3598 store_waitstatus (ourstatus
, statval
);
3600 if (rtnval
== -1) /* No more children to wait for */
3602 warning ("Child process unexpectedly missing");
3603 /* Claim it exited with unknown signal. */
3604 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3605 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
3609 pi
->had_event
= 0; /* Indicate that we've seen this one */
3617 set_proc_siginfo - set a process's current signal info
3621 void set_proc_siginfo (struct procinfo *pip, int signo);
3625 Given a pointer to a process info struct in PIP and a signal number
3626 in SIGNO, set the process's current signal and its associated signal
3627 information. The signal will be delivered to the process immediately
3628 after execution is resumed, even if it is being held. In addition,
3629 this particular delivery will not cause another PR_SIGNALLED stop
3630 even if the signal is being traced.
3632 If we are not delivering the same signal that the prstatus siginfo
3633 struct contains information about, then synthesize a siginfo struct
3634 to match the signal we are going to deliver, make it of the type
3635 "generated by a user process", and send this synthesized copy. When
3636 used to set the inferior's signal state, this will be required if we
3637 are not currently stopped because of a traced signal, or if we decide
3638 to continue with a different signal.
3640 Note that when continuing the inferior from a stop due to receipt
3641 of a traced signal, we either have set PRCSIG to clear the existing
3642 signal, or we have to call this function to do a PIOCSSIG with either
3643 the existing siginfo struct from pr_info, or one we have synthesized
3644 appropriately for the signal we want to deliver. Otherwise if the
3645 signal is still being traced, the inferior will immediately stop
3648 See siginfo(5) for more details.
3652 set_proc_siginfo (pip
, signo
)
3653 struct procinfo
*pip
;
3656 struct siginfo newsiginfo
;
3657 struct siginfo
*sip
;
3658 struct sigi_ctl sictl
;
3660 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3661 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3662 receives a PIOCSSIG with a signal identical to the current signal,
3663 it messes up the current signal. Work around the kernel bug. */
3664 if (signo
== THE_PR_LWP(pip
->prstatus
).pr_cursig
)
3669 if (signo
== THE_PR_LWP(pip
->prstatus
).pr_info
.si_signo
)
3671 memcpy ((char *) &sictl
.siginfo
, (char *) &pip
->prstatus
.pr_lwp
.pr_info
,
3672 sizeof (siginfo_t
));
3675 if (signo
== THE_PR_LWP(pip
->prstatus
).pr_info
.si_signo
)
3677 sip
= &pip
-> prstatus
.pr_info
;
3683 siginfo_t
*sip
= &sictl
.siginfo
;
3684 memset ((char *) sip
, 0, sizeof (siginfo_t
));
3686 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
3689 sip
-> si_signo
= signo
;
3691 sip
-> si_errno
= 0;
3692 sip
-> si_pid
= getpid ();
3693 sip
-> si_uid
= getuid ();
3695 #ifdef PROCFS_USE_READ_WRITE
3697 if (write (pip
->ctl_fd
, (char *) &sictl
, sizeof (struct sigi_ctl
)) < 0)
3699 if (ioctl (pip
->ctl_fd
, PIOCSSIG
, sip
) < 0)
3702 print_sys_errmsg (pip
-> pathname
, errno
);
3703 warning ("PIOCSSIG failed");
3707 /* Resume execution of process PID. If STEP is nozero, then
3708 just single step it. If SIGNAL is nonzero, restart it with that
3709 signal activated. */
3712 procfs_resume (pid
, step
, signo
)
3715 enum target_signal signo
;
3718 struct procinfo
*pi
, *procinfo
, *next_pi
;
3719 struct proc_ctl pctl
;
3721 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
3726 pctl
.data
= PRCFAULT
;
3728 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
3732 /* It should not be necessary. If the user explicitly changes the value,
3733 value_assign calls write_register_bytes, which writes it. */
3734 /* It may not be absolutely necessary to specify the PC value for
3735 restarting, but to be safe we use the value that gdb considers
3736 to be current. One case where this might be necessary is if the
3737 user explicitly changes the PC value that gdb considers to be
3738 current. FIXME: Investigate if this is necessary or not. */
3740 #ifdef PRSVADDR_BROKEN
3741 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3742 place to put nPC. In fact, if you use this, nPC seems to be set to some
3743 random garbage. We have to rely on the fact that PC and nPC have been
3744 written previously via PIOCSREG during a register flush. */
3746 pi
->prrun
.pr_vaddr
= (caddr_t
) *(int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
3747 pi
->prrun
.pr_flags
!= PRSVADDR
;
3751 if (signo
== TARGET_SIGNAL_STOP
&& pi
->nopass_next_sigstop
)
3752 /* When attaching to a child process, if we forced it to stop with
3753 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3754 Upon resuming the first time after such a stop, we explicitly
3755 inhibit sending it another SIGSTOP, which would be the normal
3756 result of default signal handling. One potential drawback to
3757 this is that we will also ignore any attempt to by the user
3758 to explicitly continue after the attach with a SIGSTOP. Ultimately
3759 this problem should be dealt with by making the routines that
3760 deal with the inferior a little smarter, and possibly even allow
3761 an inferior to continue running at the same time as gdb. (FIXME?) */
3763 else if (signo
== TARGET_SIGNAL_TSTP
3764 && THE_PR_LWP(pi
->prstatus
).pr_cursig
== SIGTSTP
3765 && THE_PR_LWP(pi
->prstatus
).pr_action
.sa_handler
== SIG_DFL
3768 /* We are about to pass the inferior a SIGTSTP whose action is
3769 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3770 (notifying the parent via wait()), and then keep going from the
3771 same place when the parent is ready for you to keep going. So
3772 under the debugger, it should do nothing (as if the program had
3773 been stopped and then later resumed. Under ptrace, this
3774 happens for us, but under /proc, the system obligingly stops
3775 the process, and wait_for_inferior would have no way of
3776 distinguishing that type of stop (which indicates that we
3777 should just start it again), with a stop due to the pr_trace
3778 field of the prrun_t struct.
3780 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3781 because the handler needs to get executed. */
3784 signal_to_pass
= target_signal_to_host (signo
);
3788 set_proc_siginfo (pi
, signal_to_pass
);
3793 pctl
.data
|= PRCSIG
;
3795 pi
->prrun
.pr_flags
|= PRCSIG
;
3798 pi
->nopass_next_sigstop
= 0;
3802 pctl
.data
|= PRSTEP
;
3804 pi
->prrun
.pr_flags
|= PRSTEP
;
3808 /* Don't try to start a process unless it's stopped on an
3809 `event of interest'. Doing so will cause errors. */
3811 if (!procfs_read_status (pi
))
3813 /* The LWP has apparently terminated. */
3815 printf_filtered ("LWP %d doesn't respond.\n",
3816 (pi
->pid
>> 16) & 0xffff);
3817 close_proc_file (pi
);
3821 #ifdef PROCFS_USE_READ_WRITE
3822 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
3824 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
3825 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
3828 /* The LWP has apparently terminated. */
3830 printf_filtered ("LWP %d doesn't respond.\n",
3831 (pi
->pid
>> 16) & 0xffff);
3832 close_proc_file (pi
);
3836 /* Continue all the other threads that haven't had an event of interest.
3837 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3838 set by do_attach, and means this is the first resume after an attach.
3839 All threads were CSTOP'd by do_attach, and should be resumed now. */
3842 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3844 next_pi
= procinfo
->next
;
3846 if (!procinfo
->had_event
||
3847 (procinfo
->nopass_next_sigstop
&& signo
== TARGET_SIGNAL_STOP
))
3849 procinfo
->had_event
= procinfo
->nopass_next_sigstop
= 0;
3850 #ifdef PROCFS_USE_READ_WRITE
3851 pctl
.data
= PRCFAULT
| PRCSIG
;
3852 if (write (procinfo
->ctl_fd
, (char *) &pctl
,
3853 sizeof (struct proc_ctl
)) < 0)
3855 if (!procfs_read_status (procinfo
))
3856 fprintf_unfiltered(gdb_stderr
,
3857 "procfs_read_status failed, errno=%d\n",
3859 print_sys_errmsg (procinfo
->pathname
, errno
);
3860 error ("PCRUN failed");
3863 procinfo
->prrun
.pr_flags
&= PRSTEP
;
3864 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
3865 if (!procfs_read_status (procinfo
))
3867 /* The LWP has apparently terminated. */
3869 printf_filtered ("LWP %d doesn't respond.\n",
3870 (procinfo
->pid
>> 16) & 0xffff);
3871 close_proc_file (procinfo
);
3875 /* Don't try to start a process unless it's stopped on an
3876 `event of interest'. Doing so will cause errors. */
3878 if ((procinfo
->prstatus
.pr_flags
& PR_ISTOP
)
3879 && ioctl (procinfo
->ctl_fd
, PIOCRUN
, &procinfo
->prrun
) < 0)
3881 if (!procfs_read_status (procinfo
))
3882 fprintf_unfiltered(gdb_stderr
,
3883 "procfs_read_status failed, errno=%d\n",
3885 print_sys_errmsg (procinfo
->pathname
, errno
);
3886 warning ("PIOCRUN failed");
3890 procfs_read_status (procinfo
);
3898 procfs_fetch_registers -- fetch current registers from inferior
3902 void procfs_fetch_registers (int regno)
3906 Read the current values of the inferior's registers, both the
3907 general register set and floating point registers (if supported)
3908 and update gdb's idea of their current values.
3913 procfs_fetch_registers (regno
)
3916 struct procinfo
*pi
;
3918 pi
= current_procinfo
;
3921 if (procfs_read_status (pi
))
3923 supply_gregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
3924 #if defined (FP0_REGNUM)
3925 supply_fpregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
);
3928 #else /* UNIXWARE */
3929 if (ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
) != -1)
3931 supply_gregset (&pi
->gregset
.gregset
);
3933 #if defined (FP0_REGNUM)
3934 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
) != -1)
3936 supply_fpregset (&pi
->fpregset
.fpregset
);
3939 #endif /* UNIXWARE */
3946 proc_init_failed - called when /proc access initialization fails
3951 static void proc_init_failed (struct procinfo *pi,
3952 char *why, int kill_p)
3956 This function is called whenever initialization of access to a /proc
3957 entry fails. It prints a suitable error message, does some cleanup,
3958 and then invokes the standard error processing routine which dumps
3959 us back into the command loop. If KILL_P is true, sends SIGKILL.
3963 proc_init_failed (pi
, why
, kill_p
)
3964 struct procinfo
*pi
;
3968 print_sys_errmsg (pi
->pathname
, errno
);
3970 kill (pi
->pid
, SIGKILL
);
3971 close_proc_file (pi
);
3980 close_proc_file - close any currently open /proc entry
3984 static void close_proc_file (struct procinfo *pip)
3988 Close any currently open /proc entry and mark the process information
3989 entry as invalid. In order to ensure that we don't try to reuse any
3990 stale information, the pid, fd, and pathnames are explicitly
3991 invalidated, which may be overkill.
3996 close_proc_file (pip
)
3997 struct procinfo
*pip
;
3999 struct procinfo
*procinfo
;
4001 delete_thread (pip
->pid
); /* remove thread from GDB's thread list */
4002 remove_fd (pip
); /* Remove fd from poll/select list */
4004 close (pip
->ctl_fd
);
4005 #ifdef HAVE_MULTIPLE_PROC_FDS
4007 close (pip
->status_fd
);
4008 close (pip
->map_fd
);
4011 free (pip
-> pathname
);
4013 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4015 if (procinfo_list
== pip
)
4016 procinfo_list
= pip
->next
;
4019 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
4021 if (procinfo
->next
== pip
)
4023 procinfo
->next
= pip
->next
;
4032 close_proc_file_cleanup (pip
)
4035 close_proc_file ((struct procinfo
*) pip
);
4038 static struct cleanup
*
4039 make_cleanup_close_proc_file (pip
)
4040 struct procinfo
*pip
;
4042 return make_cleanup (close_proc_file_cleanup
, pip
);
4049 open_proc_file - open a /proc entry for a given process id
4053 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4057 Given a process id and a mode, close the existing open /proc
4058 entry (if any) and open one for the new process id, in the
4059 specified mode. Once it is open, then mark the local process
4060 information structure as valid, which guarantees that the pid,
4061 fd, and pathname fields match an open /proc entry. Returns
4062 zero if the open fails, nonzero otherwise.
4064 Note that the pathname is left intact, even when the open fails,
4065 so that callers can use it to construct meaningful error messages
4066 rather than just "file open failed".
4068 Note that for Solaris, the process-id also includes an LWP-id, so we
4069 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4070 then we will ask the kernel what it is and add it to the pid. Hence,
4071 the pid can be changed by us.
4075 open_proc_file (pid
, pip
, mode
, control
)
4077 struct procinfo
*pip
;
4084 pip
-> had_event
= 0;
4085 pip
-> pathname
= xmalloc (MAX_PROC_NAME_SIZE
);
4094 #ifdef HAVE_MULTIPLE_PROC_FDS
4095 sprintf (pip
->pathname
, STATUS_PROC_NAME_FMT
, tmp
);
4096 if ((pip
->status_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4101 sprintf (pip
->pathname
, AS_PROC_NAME_FMT
, tmp
);
4102 if ((pip
->as_fd
= open (pip
->pathname
, O_RDWR
)) < 0)
4104 close (pip
->status_fd
);
4108 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4109 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4111 close (pip
->status_fd
);
4118 sprintf (pip
->pathname
, CTL_PROC_NAME_FMT
, tmp
);
4119 if ((pip
->ctl_fd
= open (pip
->pathname
, O_WRONLY
)) < 0)
4121 close (pip
->status_fd
);
4123 close (pip
->map_fd
);
4128 #else /* HAVE_MULTIPLE_PROC_FDS */
4129 sprintf (pip
-> pathname
, CTL_PROC_NAME_FMT
, tmp
);
4131 if ((tmpfd
= open (pip
-> pathname
, mode
)) < 0)
4135 pip
-> ctl_fd
= tmpfd
;
4136 pip
-> as_fd
= tmpfd
;
4137 pip
-> map_fd
= tmpfd
;
4138 pip
-> status_fd
= tmpfd
;
4140 tmp
= (pid
>> 16) & 0xffff; /* Extract thread id */
4143 { /* Don't know thread id yet */
4144 if (ioctl (tmpfd
, PIOCSTATUS
, &pip
-> prstatus
) < 0)
4146 print_sys_errmsg (pip
-> pathname
, errno
);
4148 error ("open_proc_file: PIOCSTATUS failed");
4151 tmp
= pip
-> prstatus
.pr_who
; /* Get thread id from prstatus_t */
4152 pip
-> pid
= (tmp
<< 16) | pid
; /* Update pip */
4155 if ((pip
-> ctl_fd
= ioctl (tmpfd
, PIOCOPENLWP
, &tmp
)) < 0)
4161 #ifdef PIOCSET /* New method */
4164 pr_flags
= PR_ASYNC
;
4165 ioctl (pip
-> ctl_fd
, PIOCSET
, &pr_flags
);
4169 /* keep extra fds in sync */
4170 pip
->as_fd
= pip
->ctl_fd
;
4171 pip
->map_fd
= pip
->ctl_fd
;
4172 pip
->status_fd
= pip
->ctl_fd
;
4174 close (tmpfd
); /* All done with main pid */
4175 #endif /* PIOCOPENLWP */
4177 #endif /* HAVE_MULTIPLE_PROC_FDS */
4183 mappingflags (flags
)
4186 static char asciiflags
[8];
4188 strcpy (asciiflags
, "-------");
4189 #if defined (MA_PHYS)
4190 if (flags
& MA_PHYS
) asciiflags
[0] = 'd';
4192 if (flags
& MA_STACK
) asciiflags
[1] = 's';
4193 if (flags
& MA_BREAK
) asciiflags
[2] = 'b';
4194 if (flags
& MA_SHARED
) asciiflags
[3] = 's';
4195 if (flags
& MA_READ
) asciiflags
[4] = 'r';
4196 if (flags
& MA_WRITE
) asciiflags
[5] = 'w';
4197 if (flags
& MA_EXEC
) asciiflags
[6] = 'x';
4198 return (asciiflags
);
4202 info_proc_flags (pip
, summary
)
4203 struct procinfo
*pip
;
4206 struct trans
*transp
;
4208 long flags
= pip
->prstatus
.pr_flags
| pip
->prstatus
.pr_lwp
.pr_flags
;
4210 long flags
= pip
->prstatus
.pr_flags
;
4213 printf_filtered ("%-32s", "Process status flags:");
4216 printf_filtered ("\n\n");
4218 for (transp
= pr_flag_table
; transp
-> name
!= NULL
; transp
++)
4220 if (flags
& transp
-> value
)
4224 printf_filtered ("%s ", transp
-> name
);
4228 printf_filtered ("\t%-16s %s.\n", transp
-> name
, transp
-> desc
);
4232 printf_filtered ("\n");
4236 info_proc_stop (pip
, summary
)
4237 struct procinfo
*pip
;
4240 struct trans
*transp
;
4244 why
= THE_PR_LWP(pip
->prstatus
).pr_why
;
4245 what
= THE_PR_LWP(pip
->prstatus
).pr_what
;
4247 if (THE_PR_LWP(pip
->prstatus
).pr_flags
& PR_STOPPED
)
4249 printf_filtered ("%-32s", "Reason for stopping:");
4252 printf_filtered ("\n\n");
4254 for (transp
= pr_why_table
; transp
-> name
!= NULL
; transp
++)
4256 if (why
== transp
-> value
)
4260 printf_filtered ("%s ", transp
-> name
);
4264 printf_filtered ("\t%-16s %s.\n",
4265 transp
-> name
, transp
-> desc
);
4271 /* Use the pr_why field to determine what the pr_what field means, and
4272 print more information. */
4277 /* pr_what is unused for this case */
4283 printf_filtered ("%s ", signalname (what
));
4287 printf_filtered ("\t%-16s %s.\n", signalname (what
),
4288 safe_strsignal (what
));
4294 printf_filtered ("%s ", syscallname (what
));
4298 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4299 "Entered this system call");
4305 printf_filtered ("%s ", syscallname (what
));
4309 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4310 "Returned from this system call");
4316 printf_filtered ("%s ",
4317 lookupname (faults_table
, what
, "fault"));
4321 printf_filtered ("\t%-16s %s.\n",
4322 lookupname (faults_table
, what
, "fault"),
4323 lookupdesc (faults_table
, what
));
4327 printf_filtered ("\n");
4332 info_proc_siginfo (pip
, summary
)
4333 struct procinfo
*pip
;
4336 struct siginfo
*sip
;
4338 if ((THE_PR_LWP(pip
->prstatus
).pr_flags
& PR_STOPPED
) &&
4339 (THE_PR_LWP(pip
->prstatus
).pr_why
== PR_SIGNALLED
||
4340 THE_PR_LWP(pip
->prstatus
).pr_why
== PR_FAULTED
))
4342 printf_filtered ("%-32s", "Additional signal/fault info:");
4343 sip
= &(THE_PR_LWP(pip
->prstatus
).pr_info
);
4346 printf_filtered ("%s ", signalname (sip
-> si_signo
));
4347 if (sip
-> si_errno
> 0)
4349 printf_filtered ("%s ", errnoname (sip
-> si_errno
));
4351 if (sip
-> si_code
<= 0)
4353 printf_filtered ("sent by %s, uid %d ",
4354 target_pid_to_str (sip
-> si_pid
),
4359 printf_filtered ("%s ", sigcodename (sip
));
4360 if ((sip
-> si_signo
== SIGILL
) ||
4361 (sip
-> si_signo
== SIGFPE
) ||
4362 (sip
-> si_signo
== SIGSEGV
) ||
4363 (sip
-> si_signo
== SIGBUS
))
4365 printf_filtered ("addr=%#lx ",
4366 (unsigned long) sip
-> si_addr
);
4368 else if ((sip
-> si_signo
== SIGCHLD
))
4370 printf_filtered ("child %s, status %u ",
4371 target_pid_to_str (sip
-> si_pid
),
4374 else if ((sip
-> si_signo
== SIGPOLL
))
4376 printf_filtered ("band %u ", sip
-> si_band
);
4382 printf_filtered ("\n\n");
4383 printf_filtered ("\t%-16s %s.\n", signalname (sip
-> si_signo
),
4384 safe_strsignal (sip
-> si_signo
));
4385 if (sip
-> si_errno
> 0)
4387 printf_filtered ("\t%-16s %s.\n",
4388 errnoname (sip
-> si_errno
),
4389 safe_strerror (sip
-> si_errno
));
4391 if (sip
-> si_code
<= 0)
4393 printf_filtered ("\t%-16u %s\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4394 "PID of process sending signal");
4395 printf_filtered ("\t%-16u %s\n", sip
-> si_uid
,
4396 "UID of process sending signal");
4400 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
4402 if ((sip
-> si_signo
== SIGILL
) ||
4403 (sip
-> si_signo
== SIGFPE
))
4405 printf_filtered ("\t%#-16lx %s.\n",
4406 (unsigned long) sip
-> si_addr
,
4407 "Address of faulting instruction");
4409 else if ((sip
-> si_signo
== SIGSEGV
) ||
4410 (sip
-> si_signo
== SIGBUS
))
4412 printf_filtered ("\t%#-16lx %s.\n",
4413 (unsigned long) sip
-> si_addr
,
4414 "Address of faulting memory reference");
4416 else if ((sip
-> si_signo
== SIGCHLD
))
4418 printf_filtered ("\t%-16u %s.\n", sip
-> si_pid
, /* XXX need target_pid_to_str() */
4419 "Child process ID");
4420 printf_filtered ("\t%-16u %s.\n", sip
-> si_status
,
4421 "Child process exit value or signal");
4423 else if ((sip
-> si_signo
== SIGPOLL
))
4425 printf_filtered ("\t%-16u %s.\n", sip
-> si_band
,
4426 "Band event for POLL_{IN,OUT,MSG}");
4430 printf_filtered ("\n");
4435 info_proc_syscalls (pip
, summary
)
4436 struct procinfo
*pip
;
4444 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4445 if (pip
-> prstatus
.pr_flags
& PR_ASLEEP
)
4447 int syscallnum
= pip
-> prstatus
.pr_reg
[R_D0
];
4450 printf_filtered ("%-32s", "Sleeping in system call:");
4451 printf_filtered ("%s", syscallname (syscallnum
));
4455 printf_filtered ("Sleeping in system call '%s'.\n",
4456 syscallname (syscallnum
));
4462 if (ioctl (pip
-> ctl_fd
, PIOCGENTRY
, &pip
-> entryset
) < 0)
4464 print_sys_errmsg (pip
-> pathname
, errno
);
4465 error ("PIOCGENTRY failed");
4468 if (ioctl (pip
-> ctl_fd
, PIOCGEXIT
, &pip
-> exitset
) < 0)
4470 print_sys_errmsg (pip
-> pathname
, errno
);
4471 error ("PIOCGEXIT failed");
4475 printf_filtered ("System call tracing information:\n\n");
4477 printf_filtered ("\t%-12s %-8s %-8s\n",
4481 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
4484 if (syscall_table
[syscallnum
] != NULL
)
4485 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
4487 printf_filtered ("\t%-12d ", syscallnum
);
4490 printf_filtered ("%-8s ",
4491 prismember (&pip
->prstatus
.pr_sysentry
, syscallnum
)
4493 printf_filtered ("%-8s ",
4494 prismember (&pip
->prstatus
.pr_sysexit
, syscallnum
)
4497 printf_filtered ("%-8s ",
4498 prismember (&pip
-> entryset
, syscallnum
)
4500 printf_filtered ("%-8s ",
4501 prismember (&pip
-> exitset
, syscallnum
)
4504 printf_filtered ("\n");
4506 printf_filtered ("\n");
4515 static char locbuf
[32];
4517 name
= strsigno (signo
);
4520 sprintf (locbuf
, "Signal %d", signo
);
4524 sprintf (locbuf
, "%s (%d)", name
, signo
);
4534 static char locbuf
[32];
4536 name
= strerrno (errnum
);
4539 sprintf (locbuf
, "Errno %d", errnum
);
4543 sprintf (locbuf
, "%s (%d)", name
, errnum
);
4549 info_proc_signals (pip
, summary
)
4550 struct procinfo
*pip
;
4557 #ifndef PROCFS_USE_READ_WRITE
4558 if (ioctl (pip
-> ctl_fd
, PIOCGTRACE
, &pip
-> trace
) < 0)
4560 print_sys_errmsg (pip
-> pathname
, errno
);
4561 error ("PIOCGTRACE failed");
4565 printf_filtered ("Disposition of signals:\n\n");
4566 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4567 "Signal", "Trace", "Hold", "Pending", "Description");
4568 for (signo
= 0; signo
< NSIG
; signo
++)
4571 printf_filtered ("\t%-15s ", signalname (signo
));
4573 printf_filtered ("%-8s ",
4574 prismember (&pip
-> prstatus
.pr_sigtrace
, signo
)
4576 printf_filtered ("%-8s ",
4577 prismember (&pip
-> prstatus
.pr_lwp
.pr_context
.uc_sigmask
, signo
)
4580 printf_filtered ("%-8s ",
4581 prismember (&pip
-> trace
, signo
)
4583 printf_filtered ("%-8s ",
4584 prismember (&pip
-> prstatus
.pr_sighold
, signo
)
4589 if (prismember (&pip
->prstatus
.pr_sigpend
, signo
) ||
4590 prismember (&pip
->prstatus
.pr_lwp
.pr_lwppend
, signo
))
4591 printf_filtered("%-8s ", "yes");
4593 printf_filtered("%-8s ", "no");
4594 #else /* UNIXWARE */
4595 #ifdef PROCFS_SIGPEND_OFFSET
4596 /* Alpha OSF/1 numbers the pending signals from 1. */
4597 printf_filtered ("%-8s ",
4598 (signo
? prismember (&pip
-> prstatus
.pr_sigpend
,
4603 printf_filtered ("%-8s ",
4604 prismember (&pip
-> prstatus
.pr_sigpend
, signo
)
4607 #endif /* UNIXWARE */
4608 printf_filtered (" %s\n", safe_strsignal (signo
));
4610 printf_filtered ("\n");
4615 info_proc_faults (pip
, summary
)
4616 struct procinfo
*pip
;
4619 struct trans
*transp
;
4624 if (ioctl (pip
-> ctl_fd
, PIOCGFAULT
, &pip
->fltset
.fltset
) < 0)
4626 print_sys_errmsg (pip
-> pathname
, errno
);
4627 error ("PIOCGFAULT failed");
4631 printf_filtered ("Current traced hardware fault set:\n\n");
4632 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4634 for (transp
= faults_table
; transp
-> name
!= NULL
; transp
++)
4637 printf_filtered ("\t%-12s ", transp
-> name
);
4639 printf_filtered ("%-8s", prismember (&pip
->prstatus
.pr_flttrace
, transp
-> value
)
4642 printf_filtered ("%-8s", prismember (&pip
->fltset
.fltset
, transp
-> value
)
4645 printf_filtered ("\n");
4647 printf_filtered ("\n");
4652 info_proc_mappings (pip
, summary
)
4653 struct procinfo
*pip
;
4657 struct prmap
*prmaps
;
4658 struct prmap
*prmap
;
4663 printf_filtered ("Mapped address spaces:\n\n");
4664 #ifdef BFD_HOST_64_BIT
4665 printf_filtered (" %18s %18s %10s %10s %7s\n",
4667 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4674 #ifdef PROCFS_USE_READ_WRITE
4675 if (fstat (pip
->map_fd
, &sbuf
) == 0)
4677 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
4678 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4679 if ((lseek (pip
->map_fd
, 0, SEEK_SET
) == 0) &&
4680 (read (pip
->map_fd
, (char *) prmaps
,
4681 nmap
* sizeof (*prmaps
)) == (nmap
* sizeof (*prmaps
))))
4684 for (prmap
= prmaps
; i
< nmap
; ++prmap
, ++i
)
4686 if (ioctl (pip
-> ctl_fd
, PIOCNMAP
, &nmap
) == 0)
4688 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4689 if (ioctl (pip
-> ctl_fd
, PIOCMAP
, prmaps
) == 0)
4691 for (prmap
= prmaps
; prmap
-> pr_size
; ++prmap
)
4692 #endif /* PROCFS_USE_READ_WRITE */
4694 #ifdef BFD_HOST_64_BIT
4695 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4697 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4699 (unsigned long)prmap
-> pr_vaddr
,
4700 (unsigned long)prmap
-> pr_vaddr
4701 + prmap
-> pr_size
- 1,
4704 mappingflags (prmap
-> pr_mflags
));
4708 printf_filtered ("\n");
4716 info_proc -- implement the "info proc" command
4720 void info_proc (char *args, int from_tty)
4724 Implement gdb's "info proc" command by using the /proc interface
4725 to print status information about any currently running process.
4727 Examples of the use of "info proc" are:
4729 info proc (prints summary info for current inferior)
4730 info proc 123 (prints summary info for process with pid 123)
4731 info proc mappings (prints address mappings)
4732 info proc times (prints process/children times)
4733 info proc id (prints pid, ppid, gid, sid, etc)
4734 FIXME: i proc id not implemented.
4735 info proc status (prints general process state info)
4736 FIXME: i proc status not implemented.
4737 info proc signals (prints info about signal handling)
4738 info proc all (prints all info)
4743 info_proc (args
, from_tty
)
4748 struct procinfo
*pip
;
4749 struct cleanup
*old_chain
;
4765 old_chain
= make_cleanup (null_cleanup
, 0);
4767 /* Default to using the current inferior if no pid specified. Note
4768 that inferior_pid may be 0, hence we set okerr. */
4770 pid
= inferior_pid
& 0x7fffffff; /* strip off sol-thread bit */
4771 if (!(pip
= find_procinfo (pid
, 1))) /* inferior_pid no good? */
4772 pip
= procinfo_list
; /* take first available */
4773 pid
= pid
& 0xffff; /* extract "real" pid */
4777 if ((argv
= buildargv (args
)) == NULL
)
4781 make_cleanup_freeargv (argv
);
4783 while (*argv
!= NULL
)
4785 argsize
= strlen (*argv
);
4786 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
4791 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
4796 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
4801 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
4806 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
4811 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
4816 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
4821 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
4826 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
4831 else if ((pid
= atoi (*argv
)) > 0)
4833 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4834 memset (pip
, 0, sizeof (*pip
));
4837 if (!open_proc_file (pid
, pip
, O_RDONLY
, 0))
4839 perror_with_name (pip
-> pathname
);
4843 make_cleanup_close_proc_file (pip
);
4845 else if (**argv
!= '\000')
4847 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
4853 /* If we don't have a valid open process at this point, then we have no
4854 inferior or didn't specify a specific pid. */
4859 No process. Start debugging a program or specify an explicit process ID.");
4862 if (!procfs_read_status (pip
))
4864 print_sys_errmsg (pip
-> pathname
, errno
);
4865 error ("procfs_read_status failed");
4868 #ifndef PROCFS_USE_READ_WRITE
4870 nlwp
= pip
->prstatus
.pr_nlwp
;
4871 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (*lwps
));
4873 if (ioctl (pip
->ctl_fd
, PIOCLWPIDS
, lwps
))
4875 print_sys_errmsg (pip
-> pathname
, errno
);
4876 error ("PIOCLWPIDS failed");
4878 #else /* PIOCLWPIDS */
4880 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
4882 #endif /* PIOCLWPIDS */
4884 for (; nlwp
> 0; nlwp
--, lwps
++)
4886 pip
= find_procinfo ((*lwps
<< 16) | pid
, 1);
4890 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4891 memset (pip
, 0, sizeof (*pip
));
4892 if (!open_proc_file ((*lwps
<< 16) | pid
, pip
, O_RDONLY
, 0))
4895 make_cleanup_close_proc_file (pip
);
4897 if (!procfs_read_status (pip
))
4899 print_sys_errmsg (pip
-> pathname
, errno
);
4900 error ("procfs_read_status failed");
4904 #endif /* PROCFS_USE_READ_WRITE */
4906 /* Print verbose information of the requested type(s), or just a summary
4907 of the information for all types. */
4909 printf_filtered ("\nInformation for %s.%d:\n\n", pip
-> pathname
, *lwps
);
4910 if (summary
|| all
|| flags
)
4912 info_proc_flags (pip
, summary
);
4916 info_proc_stop (pip
, summary
);
4918 supply_gregset (&pip
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
4920 supply_gregset (&pip
->prstatus
.pr_reg
);
4922 printf_filtered ("PC: ");
4923 print_address (read_pc (), gdb_stdout
);
4924 printf_filtered ("\n");
4926 if (summary
|| all
|| signals
|| faults
)
4928 info_proc_siginfo (pip
, summary
);
4930 if (summary
|| all
|| syscalls
)
4932 info_proc_syscalls (pip
, summary
);
4934 if (summary
|| all
|| mappings
)
4936 info_proc_mappings (pip
, summary
);
4938 if (summary
|| all
|| signals
)
4940 info_proc_signals (pip
, summary
);
4942 if (summary
|| all
|| faults
)
4944 info_proc_faults (pip
, summary
);
4946 printf_filtered ("\n");
4948 /* All done, deal with closing any temporary process info structure,
4949 freeing temporary memory , etc. */
4951 do_cleanups (old_chain
);
4952 #ifndef PROCFS_USE_READ_WRITE
4961 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
4965 void modify_inherit_on_fork_flag (fd, flag)
4969 Call this routine to modify the inherit-on-fork flag. This routine is
4970 just a nice wrapper to hide the #ifdefs needed by various systems to
4976 modify_inherit_on_fork_flag (fd
, flag
)
4980 #if defined (PIOCSET) || defined (PCSET)
4984 struct proc_ctl pctl
;
4986 #if defined (PIOCSET) || defined (PCSET) /* New method */
4990 #ifdef PROCFS_USE_READ_WRITE
4992 pctl
.data
= PR_FORK
;
4993 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
4996 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5001 #ifdef PROCFS_USE_READ_WRITE
5003 pctl
.data
= PR_FORK
;
5004 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5007 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5012 #ifdef PIOCSFORK /* Original method */
5015 retval
= ioctl (fd
, PIOCSFORK
, NULL
);
5019 retval
= ioctl (fd
, PIOCRFORK
, NULL
);
5022 Neither PR_FORK nor PIOCSFORK exist
!!!
5029 print_sys_errmsg ("modify_inherit_on_fork_flag", errno
);
5030 error ("PIOCSFORK or PR_FORK modification failed");
5037 modify_run_on_last_close_flag - Change the run-on-last-close flag
5041 void modify_run_on_last_close_flag (fd, flag)
5045 Call this routine to modify the run-on-last-close flag. This routine
5046 is just a nice wrapper to hide the #ifdefs needed by various systems to
5052 modify_run_on_last_close_flag (fd
, flag
)
5056 #if defined (PIOCSET) || defined (PCSET)
5060 struct proc_ctl pctl
;
5062 #if defined (PIOCSET) || defined (PCSET) /* New method */
5066 #ifdef PROCFS_USE_READ_WRITE
5069 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5072 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5077 #ifdef PROCFS_USE_READ_WRITE
5080 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5083 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5088 #ifdef PIOCSRLC /* Original method */
5090 retval
= ioctl (fd
, PIOCSRLC
, NULL
);
5092 retval
= ioctl (fd
, PIOCRRLC
, NULL
);
5094 Neither PR_RLC nor PIOCSRLC exist
!!!
5101 print_sys_errmsg ("modify_run_on_last_close_flag", errno
);
5102 error ("PIOCSRLC or PR_RLC modification failed");
5109 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5113 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5117 This function function disables traps for the specified system call.
5118 errok is non-zero if errors should be ignored.
5122 procfs_clear_syscall_trap (pi
, syscall_num
, errok
)
5123 struct procinfo
*pi
;
5131 goterr
= ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0;
5133 if (goterr
&& !errok
)
5135 print_sys_errmsg (pi
->pathname
, errno
);
5136 error ("PIOCGENTRY failed");
5141 prdelset (&sysset
, syscall_num
);
5143 if ((ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0) && !errok
)
5145 print_sys_errmsg (pi
->pathname
, errno
);
5146 error ("PIOCSENTRY failed");
5150 goterr
= ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0;
5152 if (goterr
&& !errok
)
5154 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5155 print_sys_errmsg (pi
->pathname
, errno
);
5156 error ("PIOCGEXIT failed");
5161 praddset (&sysset
, syscall_num
);
5163 if ((ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0) && !errok
)
5165 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5166 print_sys_errmsg (pi
->pathname
, errno
);
5167 error ("PIOCSEXIT failed");
5172 if (!pi
->syscall_handlers
)
5175 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5179 /* Remove handler func from the handler list */
5181 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5182 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5184 if (i
+ 1 != pi
->num_syscall_handlers
)
5185 { /* Not the last entry.
5186 Move subsequent entries fwd. */
5187 memcpy (&pi
->syscall_handlers
[i
], &pi
->syscall_handlers
[i
+ 1],
5188 (pi
->num_syscall_handlers
- i
- 1)
5189 * sizeof (struct procfs_syscall_handler
));
5192 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
,
5193 (pi
->num_syscall_handlers
- 1)
5194 * sizeof (struct procfs_syscall_handler
));
5195 pi
->num_syscall_handlers
--;
5200 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5208 procfs_set_syscall_trap -- arrange for a function to be called when the
5209 child executes the specified system call.
5213 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5214 syscall_func_t *function)
5218 This function sets up an entry and/or exit trap for the specified system
5219 call. When the child executes the specified system call, your function
5220 will be called with the call #, a flag that indicates entry or exit, and
5221 pointers to rtnval and statval (which are used by procfs_wait). The
5222 function should return non-zero if something interesting happened, zero
5227 procfs_set_syscall_trap (pi
, syscall_num
, flags
, func
)
5228 struct procinfo
*pi
;
5231 syscall_func_t
*func
;
5236 if (flags
& PROCFS_SYSCALL_ENTRY
)
5238 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0)
5240 print_sys_errmsg (pi
->pathname
, errno
);
5241 error ("PIOCGENTRY failed");
5244 praddset (&sysset
, syscall_num
);
5246 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0)
5248 print_sys_errmsg (pi
->pathname
, errno
);
5249 error ("PIOCSENTRY failed");
5253 if (flags
& PROCFS_SYSCALL_EXIT
)
5255 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0)
5257 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5258 print_sys_errmsg (pi
->pathname
, errno
);
5259 error ("PIOCGEXIT failed");
5262 praddset (&sysset
, syscall_num
);
5264 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0)
5266 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5267 print_sys_errmsg (pi
->pathname
, errno
);
5268 error ("PIOCSEXIT failed");
5273 if (!pi
->syscall_handlers
)
5275 pi
->syscall_handlers
= xmalloc (sizeof (struct procfs_syscall_handler
));
5276 pi
->syscall_handlers
[0].syscall_num
= syscall_num
;
5277 pi
->syscall_handlers
[0].func
= func
;
5278 pi
->num_syscall_handlers
= 1;
5284 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5285 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5287 pi
->syscall_handlers
[i
].func
= func
;
5291 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
, (i
+ 1)
5292 * sizeof (struct procfs_syscall_handler
));
5293 pi
->syscall_handlers
[i
].syscall_num
= syscall_num
;
5294 pi
->syscall_handlers
[i
].func
= func
;
5295 pi
->num_syscall_handlers
++;
5299 #ifdef SYS_lwp_create
5305 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5309 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5313 This routine is called both when an inferior process and it's new lwp
5314 are about to finish a _lwp_create() system call. This is the system
5315 call that Solaris uses to create a lightweight process. When the
5316 target process gets this event, we can look at sysarg[2] to find the
5317 new childs lwp ID, and create a procinfo struct from that. After that,
5318 we pretend that we got a SIGTRAP, and return non-zero to tell
5319 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5320 sees the new process and continues it.
5322 When we see the child exiting from lwp_create, we just contine it,
5323 since everything was handled when the parent trapped.
5326 In effect, we are only paying attention to the parent's completion of
5327 the lwp_create syscall. If we only paid attention to the child
5328 instead, then we wouldn't detect the creation of a suspended thread.
5332 procfs_lwp_creation_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
5333 struct procinfo
*pi
;
5340 struct procinfo
*childpi
;
5341 struct proc_ctl pctl
;
5343 /* We've just detected the completion of an lwp_create system call. Now we
5344 need to setup a procinfo struct for this thread, and notify the thread
5345 system of the new arrival. */
5347 /* If lwp_create failed, then nothing interesting happened. Continue the
5348 process and go back to sleep. */
5351 /* Joel ... can you check this logic out please? JKJ */
5352 if (pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
[R_EFL
] & 1)
5353 { /* _lwp_create failed */
5355 pctl
.data
= PRCFAULT
;
5357 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5358 perror_with_name (pi
->pathname
);
5362 #else /* UNIXWARE */
5363 if (PROCFS_GET_CARRY (pi
->prstatus
.pr_reg
))
5364 { /* _lwp_create failed */
5365 pi
->prrun
.pr_flags
&= PRSTEP
;
5366 pi
->prrun
.pr_flags
|= PRCFAULT
;
5368 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5369 perror_with_name (pi
->pathname
);
5375 /* At this point, the new thread is stopped at it's first instruction, and
5376 the parent is stopped at the exit from lwp_create. */
5378 if (pi
->new_child
) /* Child? */
5379 { /* Yes, just continue it */
5382 pctl
.data
= PRCFAULT
;
5384 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5385 #else /* !UNIXWARE */
5386 pi
->prrun
.pr_flags
&= PRSTEP
;
5387 pi
->prrun
.pr_flags
|= PRCFAULT
;
5389 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
5390 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5391 #endif /* !UNIXWARE */
5392 perror_with_name (pi
->pathname
);
5394 pi
->new_child
= 0; /* No longer new */
5399 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5400 in the child and continue the parent. */
5402 /* Third arg is pointer to new thread id. */
5403 lwp_id
= read_memory_integer (
5404 THE_PR_LWP(pi
->prstatus
).pr_sysarg
[2], sizeof (int));
5406 lwp_id
= (lwp_id
<< 16) | PIDGET (pi
->pid
);
5408 childpi
= create_procinfo (lwp_id
);
5410 /* The new process has actually inherited the lwp_create syscall trap from
5411 it's parent, but we still have to call this to register handlers for
5414 procfs_set_inferior_syscall_traps (childpi
);
5415 add_thread (lwp_id
);
5416 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id
));
5418 /* Continue the parent */
5421 pctl
.data
= PRCFAULT
;
5423 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5425 pi
->prrun
.pr_flags
&= PRSTEP
;
5426 pi
->prrun
.pr_flags
|= PRCFAULT
;
5427 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5429 perror_with_name (pi
->pathname
);
5431 /* The new child may have been created in one of two states:
5432 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5433 If suspended, we flag it to be continued later, when it has an event. */
5435 if (THE_PR_LWP(childpi
->prstatus
).pr_why
== PR_SUSPENDED
)
5436 childpi
->new_child
= 1; /* Flag this as an unseen child process */
5439 /* Continue the child */
5442 pctl
.data
= PRCFAULT
;
5444 if (write(pi
->ctl_fd
, (char *)&pctl
, sizeof (struct proc_ctl
)) < 0)
5446 childpi
->prrun
.pr_flags
&= PRSTEP
;
5447 childpi
->prrun
.pr_flags
|= PRCFAULT
;
5449 if (ioctl (childpi
->ctl_fd
, PIOCRUN
, &childpi
->prrun
) != 0)
5451 perror_with_name (childpi
->pathname
);
5455 #endif /* SYS_lwp_create */
5457 /* Fork an inferior process, and start debugging it with /proc. */
5460 procfs_create_inferior (exec_file
, allargs
, env
)
5465 char *shell_file
= getenv ("SHELL");
5467 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
5470 /* We will be looking down the PATH to find shell_file. If we
5471 just do this the normal way (via execlp, which operates by
5472 attempting an exec for each element of the PATH until it
5473 finds one which succeeds), then there will be an exec for
5474 each failed attempt, each of which will cause a PR_SYSEXIT
5475 stop, and we won't know how to distinguish the PR_SYSEXIT's
5476 for these failed execs with the ones for successful execs
5477 (whether the exec has succeeded is stored at that time in the
5478 carry bit or some such architecture-specific and
5479 non-ABI-specified place).
5481 So I can't think of anything better than to search the PATH
5482 now. This has several disadvantages: (1) There is a race
5483 condition; if we find a file now and it is deleted before we
5484 exec it, we lose, even if the deletion leaves a valid file
5485 further down in the PATH, (2) there is no way to know exactly
5486 what an executable (in the sense of "capable of being
5487 exec'd") file is. Using access() loses because it may lose
5488 if the caller is the superuser; failing to use it loses if
5489 there are ACLs or some such. */
5493 /* FIXME-maybe: might want "set path" command so user can change what
5494 path is used from within GDB. */
5495 char *path
= getenv ("PATH");
5497 struct stat statbuf
;
5500 path
= "/bin:/usr/bin";
5502 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
5503 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1: NULL
)
5505 p1
= strchr (p
, ':');
5510 strncpy (tryname
, p
, len
);
5511 tryname
[len
] = '\0';
5512 strcat (tryname
, "/");
5513 strcat (tryname
, shell_file
);
5514 if (access (tryname
, X_OK
) < 0)
5516 if (stat (tryname
, &statbuf
) < 0)
5518 if (!S_ISREG (statbuf
.st_mode
))
5519 /* We certainly need to reject directories. I'm not quite
5520 as sure about FIFOs, sockets, etc., but I kind of doubt
5521 that people want to exec() these things. */
5526 /* Not found. This must be an error rather than merely passing
5527 the file to execlp(), because execlp() would try all the
5528 exec()s, causing GDB to get confused. */
5529 error ("Can't find shell %s in PATH", shell_file
);
5531 shell_file
= tryname
;
5534 fork_inferior (exec_file
, allargs
, env
,
5535 proc_set_exec_trap
, procfs_init_inferior
, NULL
, shell_file
);
5537 /* We are at the first instruction we care about. */
5538 /* Pedal to the metal... */
5540 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
5543 /* Clean up after the inferior dies. */
5546 procfs_mourn_inferior ()
5548 struct procinfo
*pi
;
5549 struct procinfo
*next_pi
;
5551 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5554 unconditionally_kill_inferior (pi
);
5557 unpush_target (&procfs_ops
);
5558 generic_mourn_inferior ();
5562 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5566 /* This variable is controlled by modules that sit atop procfs that may layer
5567 their own process structure atop that provided here. sol-thread.c does
5568 this because of the Solaris two-level thread model. */
5570 return !procfs_suppress_run
;
5572 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5575 /* Insert a watchpoint */
5577 procfs_set_watchpoint(pid
, addr
, len
, rw
)
5583 struct procinfo
*pi
;
5586 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5587 wpt
.pr_vaddr
= (caddr_t
)addr
;
5589 wpt
.pr_wflags
= ((rw
& 1) ? MA_READ
: 0) | ((rw
& 2) ? MA_WRITE
: 0);
5590 if (ioctl (pi
->ctl_fd
, PIOCSWATCH
, &wpt
) < 0)
5594 /* Currently it sometimes happens that the same watchpoint gets
5595 deleted twice - don't die in this case (FIXME please) */
5596 if (errno
== ESRCH
&& len
== 0)
5598 print_sys_errmsg (pi
->pathname
, errno
);
5599 error ("PIOCSWATCH failed");
5605 procfs_stopped_by_watchpoint(pid
)
5608 struct procinfo
*pi
;
5612 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5613 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
5615 why
= pi
->prstatus
.pr_why
;
5616 what
= pi
->prstatus
.pr_what
;
5617 if (why
== PR_FAULTED
5618 #if defined (FLTWATCH) && defined (FLTKWATCH)
5619 && (what
== FLTWATCH
|| what
== FLTKWATCH
)
5622 && (what
== FLTWATCH
)
5625 && (what
== FLTKWATCH
)
5633 #endif /* !UNIXWARE */
5634 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5636 /* Why is this necessary? Shouldn't dead threads just be removed from the
5640 procfs_thread_alive (pid
)
5643 struct procinfo
*pi
, *next_pi
;
5645 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5648 if (pi
-> pid
== pid
)
5649 if (procfs_read_status (pi
)) /* alive */
5651 else /* defunct (exited) */
5653 close_proc_file (pi
);
5661 procfs_first_available ()
5663 struct procinfo
*pi
;
5665 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
5667 if (procfs_read_status (pi
))
5674 procfs_get_pid_fd (pid
)
5677 struct procinfo
*pi
= find_procinfo (pid
, 1);
5685 /* Send a SIGINT to the process group. This acts just like the user typed a
5686 ^C on the controlling terminal.
5688 XXX - This may not be correct for all systems. Some may want to use
5689 killpg() instead of kill (-pgrp). */
5694 extern pid_t inferior_process_group
;
5696 kill (-inferior_process_group
, SIGINT
);
5699 /* Convert a pid to printable form. */
5703 procfs_pid_to_str (pid
)
5706 static char buf
[100];
5708 sprintf (buf
, "Kernel thread %d", TIDGET (pid
));
5718 procfs_ops
.to_shortname
= "procfs";
5719 procfs_ops
.to_longname
= "Unix /proc child process";
5720 procfs_ops
.to_doc
= "Unix /proc child process (started by the \"run\" command).";
5721 procfs_ops
.to_open
= procfs_open
;
5722 procfs_ops
.to_attach
= procfs_attach
;
5723 procfs_ops
.to_detach
= procfs_detach
;
5724 procfs_ops
.to_resume
= procfs_resume
;
5725 procfs_ops
.to_wait
= procfs_wait
;
5726 procfs_ops
.to_fetch_registers
= procfs_fetch_registers
;
5727 procfs_ops
.to_store_registers
= procfs_store_registers
;
5728 procfs_ops
.to_prepare_to_store
= procfs_prepare_to_store
;
5729 procfs_ops
.to_xfer_memory
= procfs_xfer_memory
;
5730 procfs_ops
.to_files_info
= procfs_files_info
;
5731 procfs_ops
.to_insert_breakpoint
= memory_insert_breakpoint
;
5732 procfs_ops
.to_remove_breakpoint
= memory_remove_breakpoint
;
5733 procfs_ops
.to_terminal_init
= terminal_init_inferior
;
5734 procfs_ops
.to_terminal_inferior
= terminal_inferior
;
5735 procfs_ops
.to_terminal_ours_for_output
= terminal_ours_for_output
;
5736 procfs_ops
.to_terminal_ours
= terminal_ours
;
5737 procfs_ops
.to_terminal_info
= child_terminal_info
;
5738 procfs_ops
.to_kill
= procfs_kill_inferior
;
5739 procfs_ops
.to_create_inferior
= procfs_create_inferior
;
5740 procfs_ops
.to_mourn_inferior
= procfs_mourn_inferior
;
5741 procfs_ops
.to_can_run
= procfs_can_run
;
5742 procfs_ops
.to_notice_signals
= procfs_notice_signals
;
5743 procfs_ops
.to_thread_alive
= procfs_thread_alive
;
5744 procfs_ops
.to_stop
= procfs_stop
;
5745 procfs_ops
.to_stratum
= process_stratum
;
5746 procfs_ops
.to_has_all_memory
= 1;
5747 procfs_ops
.to_has_memory
= 1;
5748 procfs_ops
.to_has_stack
= 1;
5749 procfs_ops
.to_has_registers
= 1;
5750 procfs_ops
.to_has_execution
= 1;
5751 procfs_ops
.to_magic
= OPS_MAGIC
;
5755 _initialize_procfs ()
5757 #ifdef HAVE_OPTIONAL_PROC_FS
5758 char procname
[MAX_PROC_NAME_SIZE
];
5761 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5762 don't add procfs support if we cannot access the running
5764 sprintf (procname
, STATUS_PROC_NAME_FMT
, getpid ());
5765 if ((fd
= open (procname
, O_RDONLY
)) < 0)
5771 add_target (&procfs_ops
);
5773 add_info ("processes", info_proc
,
5774 "Show process status information using /proc entry.\n\
5775 Specify process id or use current inferior by default.\n\
5776 Specify keywords for detailed information; default is summary.\n\
5777 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5778 `status', `syscalls', and `times'.\n\
5779 Unambiguous abbreviations may be used.");
5781 init_syscall_table ();