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,
21 Boston, MA 02111-1307, USA. */
26 For information on the details of using /proc consult section proc(4)
27 in the UNIX System V Release 4 System Administrator's Reference Manual.
29 The general register and floating point register sets are manipulated
30 separately. This file makes the assumption that if FP0_REGNUM is
31 defined, then support for the floating point register set is desired,
32 regardless of whether or not the actual target has floating point hardware.
39 #include <sys/types.h>
41 #include <sys/fault.h>
42 #include <sys/syscall.h>
43 #include <sys/procfs.h>
46 #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 */
181 /* set general registers */
185 gdb_gregset_t gregset
;
188 /* set fp registers */
192 gdb_fpregset_t fpregset
;
195 /* set signals to be traced */
202 /* set faults to be traced */
209 /* set system calls to be traced */
216 /* set current signal to be traced */
223 /* All access to the inferior, either one started by gdb or one that has
224 been attached to, is controlled by an instance of a procinfo structure,
225 defined below. Since gdb currently only handles one inferior at a time,
226 the procinfo structure for the inferior is statically allocated and
227 only one exists at any given time. There is a separate procinfo
228 structure for use by the "info proc" command, so that we can print
229 useful information about any random process without interfering with
230 the inferior's procinfo information. */
234 struct procinfo
*next
;
235 int pid
; /* Process ID of inferior */
236 int ctl_fd
; /* File descriptor for /proc ctl file */
237 int status_fd
; /* File descriptor for /proc status file */
238 int as_fd
; /* File descriptor for /proc as file */
239 int map_fd
; /* File descriptor for /proc map file */
240 char *pathname
; /* Pathname to /proc entry */
241 int had_event
; /* poll/select says something happened */
242 int was_stopped
; /* Nonzero if was stopped prior to attach */
243 int nopass_next_sigstop
; /* Don't pass a sigstop on next resume */
245 prrun_t prrun
; /* Control state when it is run */
247 gdb_prstatus_t prstatus
; /* Current process status info */
248 struct greg_ctl gregset
; /* General register set */
249 struct fpreg_ctl fpregset
; /* Floating point register set */
250 struct flt_ctl fltset
; /* Current traced hardware fault set */
251 struct sig_ctl trace
; /* Current traced signal set */
252 struct sys_ctl exitset
; /* Current traced system call exit set */
253 struct sys_ctl entryset
; /* Current traced system call entry set */
254 struct sig_ctl saved_sighold
; /* Saved held signal set */
255 struct flt_ctl saved_fltset
; /* Saved traced hardware fault set */
256 struct sig_ctl saved_trace
; /* Saved traced signal set */
257 struct sys_ctl saved_exitset
; /* Saved traced system call exit set */
258 struct sys_ctl saved_entryset
; /* Saved traced system call entry set */
259 int num_syscall_handlers
; /* Number of syscall trap handlers
260 currently installed */
261 /* Pointer to list of syscall trap handlers */
262 struct procfs_syscall_handler
*syscall_handlers
;
263 int saved_rtnval
; /* return value and status for wait(), */
264 int saved_statval
; /* as supplied by a syscall handler. */
265 int new_child
; /* Non-zero if it's a new thread */
268 /* List of inferior process information */
269 static struct procinfo
*procinfo_list
= NULL
;
270 static struct pollfd
*poll_list
; /* pollfds used for waiting on /proc */
272 static int num_poll_list
= 0; /* Number of entries in poll_list */
274 /* Much of the information used in the /proc interface, particularly for
275 printing status information, is kept as tables of structures of the
276 following form. These tables can be used to map numeric values to
277 their symbolic names and to a string that describes their specific use. */
281 int value
; /* The numeric value */
282 char *name
; /* The equivalent symbolic value */
283 char *desc
; /* Short description of value */
286 /* Translate bits in the pr_flags member of the prstatus structure, into the
287 names and desc information. */
289 static struct trans pr_flag_table
[] =
291 #if defined (PR_STOPPED)
292 {PR_STOPPED
, "PR_STOPPED", "Process is stopped"},
294 #if defined (PR_ISTOP)
295 {PR_ISTOP
, "PR_ISTOP", "Stopped on an event of interest"},
297 #if defined (PR_DSTOP)
298 {PR_DSTOP
, "PR_DSTOP", "A stop directive is in effect"},
300 #if defined (PR_ASLEEP)
301 {PR_ASLEEP
, "PR_ASLEEP", "Sleeping in an interruptible system call"},
303 #if defined (PR_FORK)
304 {PR_FORK
, "PR_FORK", "Inherit-on-fork is in effect"},
307 {PR_RLC
, "PR_RLC", "Run-on-last-close is in effect"},
309 #if defined (PR_PTRACE)
310 {PR_PTRACE
, "PR_PTRACE", "Process is being controlled by ptrace"},
312 #if defined (PR_PCINVAL)
313 {PR_PCINVAL
, "PR_PCINVAL", "PC refers to an invalid virtual address"},
315 #if defined (PR_ISSYS)
316 {PR_ISSYS
, "PR_ISSYS", "Is a system process"},
318 #if defined (PR_STEP)
319 {PR_STEP
, "PR_STEP", "Process has single step pending"},
322 {PR_KLC
, "PR_KLC", "Kill-on-last-close is in effect"},
324 #if defined (PR_ASYNC)
325 {PR_ASYNC
, "PR_ASYNC", "Asynchronous stop is in effect"},
327 #if defined (PR_PCOMPAT)
328 {PR_PCOMPAT
, "PR_PCOMPAT", "Ptrace compatibility mode in effect"},
330 #if defined (PR_MSACCT)
331 {PR_MSACCT
, "PR_MSACCT", "Microstate accounting enabled"},
333 #if defined (PR_BPTADJ)
334 {PR_BPTADJ
, "PR_BPTADJ", "Breakpoint PC adjustment in effect"},
336 #if defined (PR_ASLWP)
337 {PR_ASLWP
, "PR_ASLWP", "Asynchronus signal LWP"},
342 /* Translate values in the pr_why field of the prstatus struct. */
344 static struct trans pr_why_table
[] =
346 #if defined (PR_REQUESTED)
347 {PR_REQUESTED
, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP"},
349 #if defined (PR_SIGNALLED)
350 {PR_SIGNALLED
, "PR_SIGNALLED", "Receipt of a traced signal"},
352 #if defined (PR_SYSENTRY)
353 {PR_SYSENTRY
, "PR_SYSENTRY", "Entry to a traced system call"},
355 #if defined (PR_SYSEXIT)
356 {PR_SYSEXIT
, "PR_SYSEXIT", "Exit from a traced system call"},
358 #if defined (PR_JOBCONTROL)
359 {PR_JOBCONTROL
, "PR_JOBCONTROL", "Default job control stop signal action"},
361 #if defined (PR_FAULTED)
362 {PR_FAULTED
, "PR_FAULTED", "Incurred a traced hardware fault"},
364 #if defined (PR_SUSPENDED)
365 {PR_SUSPENDED
, "PR_SUSPENDED", "Process suspended"},
367 #if defined (PR_CHECKPOINT)
368 {PR_CHECKPOINT
, "PR_CHECKPOINT", "(???)"},
373 /* Hardware fault translation table. */
375 static struct trans faults_table
[] =
378 {FLTILL
, "FLTILL", "Illegal instruction"},
380 #if defined (FLTPRIV)
381 {FLTPRIV
, "FLTPRIV", "Privileged instruction"},
384 {FLTBPT
, "FLTBPT", "Breakpoint trap"},
386 #if defined (FLTTRACE)
387 {FLTTRACE
, "FLTTRACE", "Trace trap"},
389 #if defined (FLTACCESS)
390 {FLTACCESS
, "FLTACCESS", "Memory access fault"},
392 #if defined (FLTBOUNDS)
393 {FLTBOUNDS
, "FLTBOUNDS", "Memory bounds violation"},
395 #if defined (FLTIOVF)
396 {FLTIOVF
, "FLTIOVF", "Integer overflow"},
398 #if defined (FLTIZDIV)
399 {FLTIZDIV
, "FLTIZDIV", "Integer zero divide"},
402 {FLTFPE
, "FLTFPE", "Floating-point exception"},
404 #if defined (FLTSTACK)
405 {FLTSTACK
, "FLTSTACK", "Unrecoverable stack fault"},
407 #if defined (FLTPAGE)
408 {FLTPAGE
, "FLTPAGE", "Recoverable page fault"},
413 /* Translation table for signal generation information. See UNIX System
414 V Release 4 Programmer's Reference Manual, siginfo(5). */
416 static struct sigcode
425 #if defined (SIGILL) && defined (ILL_ILLOPC)
427 SIGILL
, ILL_ILLOPC
, "ILL_ILLOPC", "Illegal opcode"
431 #if defined (SIGILL) && defined (ILL_ILLOPN)
433 SIGILL
, ILL_ILLOPN
, "ILL_ILLOPN", "Illegal operand",
437 #if defined (SIGILL) && defined (ILL_ILLADR)
439 SIGILL
, ILL_ILLADR
, "ILL_ILLADR", "Illegal addressing mode"
443 #if defined (SIGILL) && defined (ILL_ILLTRP)
445 SIGILL
, ILL_ILLTRP
, "ILL_ILLTRP", "Illegal trap"
449 #if defined (SIGILL) && defined (ILL_PRVOPC)
451 SIGILL
, ILL_PRVOPC
, "ILL_PRVOPC", "Privileged opcode"
455 #if defined (SIGILL) && defined (ILL_PRVREG)
457 SIGILL
, ILL_PRVREG
, "ILL_PRVREG", "Privileged register"
461 #if defined (SIGILL) && defined (ILL_COPROC)
463 SIGILL
, ILL_COPROC
, "ILL_COPROC", "Coprocessor error"
467 #if defined (SIGILL) && defined (ILL_BADSTK)
469 SIGILL
, ILL_BADSTK
, "ILL_BADSTK", "Internal stack error"
473 #if defined (SIGFPE) && defined (FPE_INTDIV)
475 SIGFPE
, FPE_INTDIV
, "FPE_INTDIV", "Integer divide by zero"
479 #if defined (SIGFPE) && defined (FPE_INTOVF)
481 SIGFPE
, FPE_INTOVF
, "FPE_INTOVF", "Integer overflow"
485 #if defined (SIGFPE) && defined (FPE_FLTDIV)
487 SIGFPE
, FPE_FLTDIV
, "FPE_FLTDIV", "Floating point divide by zero"
491 #if defined (SIGFPE) && defined (FPE_FLTOVF)
493 SIGFPE
, FPE_FLTOVF
, "FPE_FLTOVF", "Floating point overflow"
497 #if defined (SIGFPE) && defined (FPE_FLTUND)
499 SIGFPE
, FPE_FLTUND
, "FPE_FLTUND", "Floating point underflow"
503 #if defined (SIGFPE) && defined (FPE_FLTRES)
505 SIGFPE
, FPE_FLTRES
, "FPE_FLTRES", "Floating point inexact result"
509 #if defined (SIGFPE) && defined (FPE_FLTINV)
511 SIGFPE
, FPE_FLTINV
, "FPE_FLTINV", "Invalid floating point operation"
515 #if defined (SIGFPE) && defined (FPE_FLTSUB)
517 SIGFPE
, FPE_FLTSUB
, "FPE_FLTSUB", "Subscript out of range"
521 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
523 SIGSEGV
, SEGV_MAPERR
, "SEGV_MAPERR", "Address not mapped to object"
527 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
529 SIGSEGV
, SEGV_ACCERR
, "SEGV_ACCERR", "Invalid permissions for object"
533 #if defined (SIGBUS) && defined (BUS_ADRALN)
535 SIGBUS
, BUS_ADRALN
, "BUS_ADRALN", "Invalid address alignment"
539 #if defined (SIGBUS) && defined (BUS_ADRERR)
541 SIGBUS
, BUS_ADRERR
, "BUS_ADRERR", "Non-existent physical address"
545 #if defined (SIGBUS) && defined (BUS_OBJERR)
547 SIGBUS
, BUS_OBJERR
, "BUS_OBJERR", "Object specific hardware error"
551 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
553 SIGTRAP
, TRAP_BRKPT
, "TRAP_BRKPT", "Process breakpoint"
557 #if defined (SIGTRAP) && defined (TRAP_TRACE)
559 SIGTRAP
, TRAP_TRACE
, "TRAP_TRACE", "Process trace trap"
563 #if defined (SIGCLD) && defined (CLD_EXITED)
565 SIGCLD
, CLD_EXITED
, "CLD_EXITED", "Child has exited"
569 #if defined (SIGCLD) && defined (CLD_KILLED)
571 SIGCLD
, CLD_KILLED
, "CLD_KILLED", "Child was killed"
575 #if defined (SIGCLD) && defined (CLD_DUMPED)
577 SIGCLD
, CLD_DUMPED
, "CLD_DUMPED", "Child has terminated abnormally"
581 #if defined (SIGCLD) && defined (CLD_TRAPPED)
583 SIGCLD
, CLD_TRAPPED
, "CLD_TRAPPED", "Traced child has trapped"
587 #if defined (SIGCLD) && defined (CLD_STOPPED)
589 SIGCLD
, CLD_STOPPED
, "CLD_STOPPED", "Child has stopped"
593 #if defined (SIGCLD) && defined (CLD_CONTINUED)
595 SIGCLD
, CLD_CONTINUED
, "CLD_CONTINUED", "Stopped child had continued"
599 #if defined (SIGPOLL) && defined (POLL_IN)
601 SIGPOLL
, POLL_IN
, "POLL_IN", "Input input available"
605 #if defined (SIGPOLL) && defined (POLL_OUT)
607 SIGPOLL
, POLL_OUT
, "POLL_OUT", "Output buffers available"
611 #if defined (SIGPOLL) && defined (POLL_MSG)
613 SIGPOLL
, POLL_MSG
, "POLL_MSG", "Input message available"
617 #if defined (SIGPOLL) && defined (POLL_ERR)
619 SIGPOLL
, POLL_ERR
, "POLL_ERR", "I/O error"
623 #if defined (SIGPOLL) && defined (POLL_PRI)
625 SIGPOLL
, POLL_PRI
, "POLL_PRI", "High priority input available"
629 #if defined (SIGPOLL) && defined (POLL_HUP)
631 SIGPOLL
, POLL_HUP
, "POLL_HUP", "Device disconnected"
640 static char *syscall_table
[MAX_SYSCALLS
];
642 /* Prototypes for local functions */
644 static void procfs_stop
PARAMS ((void));
646 static int procfs_thread_alive
PARAMS ((int));
648 static int procfs_can_run
PARAMS ((void));
650 static void procfs_mourn_inferior
PARAMS ((void));
652 static void procfs_fetch_registers
PARAMS ((int));
654 static int procfs_wait
PARAMS ((int, struct target_waitstatus
*));
656 static void procfs_open
PARAMS ((char *, int));
658 static void procfs_files_info
PARAMS ((struct target_ops
*));
660 static void procfs_prepare_to_store
PARAMS ((void));
662 static void procfs_detach
PARAMS ((char *, int));
664 static void procfs_attach
PARAMS ((char *, int));
666 static void proc_set_exec_trap
PARAMS ((void));
668 static void procfs_init_inferior
PARAMS ((int));
670 static struct procinfo
*create_procinfo
PARAMS ((int));
672 static void procfs_store_registers
PARAMS ((int));
674 static int procfs_xfer_memory
PARAMS ((CORE_ADDR
, char *, int, int, struct target_ops
*));
676 static void procfs_kill_inferior
PARAMS ((void));
678 static char *sigcodedesc
PARAMS ((siginfo_t
*));
680 static char *sigcodename
PARAMS ((siginfo_t
*));
682 static struct procinfo
*wait_fd
PARAMS ((void));
684 static void remove_fd
PARAMS ((struct procinfo
*));
686 static void add_fd
PARAMS ((struct procinfo
*));
688 static void set_proc_siginfo
PARAMS ((struct procinfo
*, int));
690 static void init_syscall_table
PARAMS ((void));
692 static char *syscallname
PARAMS ((int));
694 static char *signalname
PARAMS ((int));
696 static char *errnoname
PARAMS ((int));
698 static int proc_address_to_fd
PARAMS ((struct procinfo
*, CORE_ADDR
, int));
700 static int open_proc_file
PARAMS ((int, struct procinfo
*, int, int));
702 static void close_proc_file
PARAMS ((struct procinfo
*));
704 static void close_proc_file_cleanup
PARAMS ((void *));
706 static struct cleanup
*make_cleanup_close_proc_file
PARAMS ((struct procinfo
*));
708 static void unconditionally_kill_inferior
PARAMS ((struct procinfo
*));
710 static NORETURN
void proc_init_failed
711 PARAMS ((struct procinfo
*, char *, int)) ATTR_NORETURN
;
713 static void info_proc
PARAMS ((char *, int));
715 static void info_proc_flags
PARAMS ((struct procinfo
*, int));
717 static void info_proc_stop
PARAMS ((struct procinfo
*, int));
719 static void info_proc_siginfo
PARAMS ((struct procinfo
*, int));
721 static void info_proc_syscalls
PARAMS ((struct procinfo
*, int));
723 static void info_proc_mappings
PARAMS ((struct procinfo
*, int));
725 static void info_proc_signals
PARAMS ((struct procinfo
*, int));
727 static void info_proc_faults
PARAMS ((struct procinfo
*, int));
729 static char *mappingflags
PARAMS ((long));
731 static char *lookupname
PARAMS ((struct trans
*, unsigned int, char *));
733 static char *lookupdesc
PARAMS ((struct trans
*, unsigned int));
735 static int do_attach
PARAMS ((int pid
));
737 static void do_detach
PARAMS ((int siggnal
));
739 static void procfs_create_inferior
PARAMS ((char *, char *, char **));
741 static void procfs_notice_signals
PARAMS ((int pid
));
743 static void notice_signals
PARAMS ((struct procinfo
*, struct sig_ctl
*));
745 static struct procinfo
*find_procinfo
PARAMS ((pid_t pid
, int okfail
));
747 static int procfs_write_pcwstop
PARAMS ((struct procinfo
*));
748 static int procfs_read_status
PARAMS ((struct procinfo
*));
749 static void procfs_write_pckill
PARAMS ((struct procinfo
*));
751 typedef int syscall_func_t
PARAMS ((struct procinfo
* pi
, int syscall_num
,
752 int why
, int *rtnval
, int *statval
));
754 static void procfs_set_syscall_trap
PARAMS ((struct procinfo
* pi
,
755 int syscall_num
, int flags
,
756 syscall_func_t
* func
));
758 static void procfs_clear_syscall_trap
PARAMS ((struct procinfo
* pi
,
759 int syscall_num
, int errok
));
761 #define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
762 #define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
764 static syscall_func_t procfs_exit_handler
;
766 static syscall_func_t procfs_exec_handler
;
769 static syscall_func_t procfs_sproc_handler
;
770 static syscall_func_t procfs_fork_handler
;
773 #ifdef SYS_lwp_create
774 static syscall_func_t procfs_lwp_creation_handler
;
777 static void modify_inherit_on_fork_flag
PARAMS ((int fd
, int flag
));
778 static void modify_run_on_last_close_flag
PARAMS ((int fd
, int flag
));
782 struct procfs_syscall_handler
784 int syscall_num
; /* The number of the system call being handled */
785 /* The function to be called */
786 syscall_func_t
*func
;
789 static void procfs_resume
PARAMS ((int pid
, int step
,
790 enum target_signal signo
));
792 static void init_procfs_ops
PARAMS ((void));
794 /* External function prototypes that can't be easily included in any
795 header file because the args are typedefs in system include files. */
797 extern void supply_gregset
PARAMS ((gdb_gregset_t
*));
799 extern void fill_gregset
PARAMS ((gdb_gregset_t
*, int));
802 extern void supply_fpregset
PARAMS ((gdb_fpregset_t
*));
804 extern void fill_fpregset
PARAMS ((gdb_fpregset_t
*, int));
811 find_procinfo -- convert a process id to a struct procinfo
815 static struct procinfo * find_procinfo (pid_t pid, int okfail);
819 Given a process id, look it up in the procinfo chain. Returns
820 a struct procinfo *. If can't find pid, then call error(),
821 unless okfail is set, in which case, return NULL;
824 static struct procinfo
*
825 find_procinfo (pid
, okfail
)
829 struct procinfo
*procinfo
;
831 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
832 if (procinfo
->pid
== pid
)
838 error ("procfs (find_procinfo): Couldn't locate pid %d", pid
);
845 current_procinfo -- convert inferior_pid to a struct procinfo
849 static struct procinfo * current_procinfo;
853 Looks up inferior_pid in the procinfo chain. Always returns a
854 struct procinfo *. If process can't be found, we error() out.
857 #define current_procinfo find_procinfo (inferior_pid, 0)
863 add_fd -- Add the fd to the poll/select list
867 static void add_fd (struct procinfo *);
871 Add the fd of the supplied procinfo to the list of fds used for
872 poll/select operations.
879 if (num_poll_list
<= 0)
880 poll_list
= (struct pollfd
*) xmalloc (sizeof (struct pollfd
));
882 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
884 * sizeof (struct pollfd
));
885 poll_list
[num_poll_list
].fd
= pi
->ctl_fd
;
887 poll_list
[num_poll_list
].events
= POLLWRNORM
;
889 poll_list
[num_poll_list
].events
= POLLPRI
;
899 remove_fd -- Remove the fd from the poll/select list
903 static void remove_fd (struct procinfo *);
907 Remove the fd of the supplied procinfo from the list of fds used
908 for poll/select operations.
917 for (i
= 0; i
< num_poll_list
; i
++)
919 if (poll_list
[i
].fd
== pi
->ctl_fd
)
921 if (i
!= num_poll_list
- 1)
922 memcpy (poll_list
+ i
, poll_list
+ i
+ 1,
923 (num_poll_list
- i
- 1) * sizeof (struct pollfd
));
927 if (num_poll_list
== 0)
930 poll_list
= (struct pollfd
*) xrealloc (poll_list
,
932 * sizeof (struct pollfd
));
942 procfs_read_status - get procfs fd status
946 static int procfs_read_status (pi) struct procinfo *pi;
950 Given a pointer to a procinfo struct, get the status of
951 the status_fd in the appropriate way. Returns 0 on failure,
956 procfs_read_status (pi
)
959 #ifdef PROCFS_USE_READ_WRITE
960 if ((lseek (pi
->status_fd
, 0, SEEK_SET
) < 0) ||
961 (read (pi
->status_fd
, (char *) &pi
->prstatus
,
962 sizeof (gdb_prstatus_t
)) != sizeof (gdb_prstatus_t
)))
964 if (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) < 0)
975 procfs_write_pcwstop - send a PCWSTOP to procfs fd
979 static int procfs_write_pcwstop (pi) struct procinfo *pi;
983 Given a pointer to a procinfo struct, send a PCWSTOP to
984 the ctl_fd in the appropriate way. Returns 0 on failure,
989 procfs_write_pcwstop (pi
)
992 #ifdef PROCFS_USE_READ_WRITE
994 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
996 if (ioctl (pi
->ctl_fd
, PIOCWSTOP
, &pi
->prstatus
) < 0)
1007 procfs_write_pckill - send a kill to procfs fd
1011 static void procfs_write_pckill (pi) struct procinfo *pi;
1015 Given a pointer to a procinfo struct, send a kill to
1016 the ctl_fd in the appropriate way. Returns 0 on failure,
1021 procfs_write_pckill (pi
)
1022 struct procinfo
*pi
;
1024 #ifdef PROCFS_USE_READ_WRITE
1025 struct proc_ctl pctl
;
1027 pctl
.data
= SIGKILL
;
1028 write (pi
->ctl_fd
, &pctl
, sizeof (struct proc_ctl
));
1030 int signo
= SIGKILL
;
1031 ioctl (pi
->ctl_fd
, PIOCKILL
, &signo
);
1035 static struct procinfo
*
1038 struct procinfo
*pi
, *next_pi
;
1044 set_sigint_trap (); /* Causes SIGINT to be passed on to the
1045 attached process. */
1052 num_fds
= poll (poll_list
, num_poll_list
, -1);
1055 if (num_fds
< 0 && errno
== EINTR
)
1057 print_sys_errmsg ("poll failed", errno
);
1058 error ("Poll failed, returned %d", num_fds
);
1060 #else /* LOSING_POLL */
1061 pi
= current_procinfo
;
1063 while (!procfs_write_pcwstop (pi
))
1065 if (errno
== ENOENT
)
1067 /* Process exited. */
1068 pi
->prstatus
.pr_flags
= 0;
1071 else if (errno
!= EINTR
)
1073 print_sys_errmsg (pi
->pathname
, errno
);
1074 error ("procfs_write_pcwstop failed");
1078 #endif /* LOSING_POLL */
1080 clear_sigint_trap ();
1081 clear_sigio_trap ();
1085 for (i
= 0; i
< num_poll_list
&& num_fds
> 0; i
++)
1087 if (0 == (poll_list
[i
].revents
&
1088 (POLLWRNORM
| POLLPRI
| POLLERR
| POLLHUP
| POLLNVAL
)))
1090 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
1093 if (poll_list
[i
].fd
== pi
->ctl_fd
)
1096 if ((poll_list
[i
].revents
& POLLHUP
) != 0 ||
1097 !procfs_read_status (pi
))
1098 { /* The LWP has apparently terminated. */
1099 if (num_poll_list
<= 1)
1101 pi
->prstatus
.pr_flags
= 0;
1106 printf_filtered ("LWP %d exited.\n",
1107 (pi
->pid
>> 16) & 0xffff);
1108 close_proc_file (pi
);
1109 i
--; /* don't skip deleted entry */
1111 break; /* already another event to process */
1113 goto wait_again
; /* wait for another event */
1120 error ("wait_fd: Couldn't find procinfo for fd %d\n",
1123 #endif /* LOSING_POLL */
1132 lookupdesc -- translate a value to a summary desc string
1136 static char *lookupdesc (struct trans *transp, unsigned int val);
1140 Given a pointer to a translation table and a value to be translated,
1141 lookup the desc string and return it.
1145 lookupdesc (transp
, val
)
1146 struct trans
*transp
;
1151 for (desc
= NULL
; transp
->name
!= NULL
; transp
++)
1153 if (transp
->value
== val
)
1155 desc
= transp
->desc
;
1160 /* Didn't find a translation for the specified value, set a default one. */
1173 lookupname -- translate a value to symbolic name
1177 static char *lookupname (struct trans *transp, unsigned int val,
1182 Given a pointer to a translation table, a value to be translated,
1183 and a default prefix to return if the value can't be translated,
1184 match the value with one of the translation table entries and
1185 return a pointer to the symbolic name.
1187 If no match is found it just returns the value as a printable string,
1188 with the given prefix. The previous such value, if any, is freed
1193 lookupname (transp
, val
, prefix
)
1194 struct trans
*transp
;
1198 static char *locbuf
;
1201 for (name
= NULL
; transp
->name
!= NULL
; transp
++)
1203 if (transp
->value
== val
)
1205 name
= transp
->name
;
1210 /* Didn't find a translation for the specified value, build a default
1211 one using the specified prefix and return it. The lifetime of
1212 the value is only until the next one is needed. */
1220 locbuf
= xmalloc (strlen (prefix
) + 16);
1221 sprintf (locbuf
, "%s %u", prefix
, val
);
1231 struct sigcode
*scp
;
1233 static char locbuf
[32];
1235 for (scp
= siginfo_table
; scp
->codename
!= NULL
; scp
++)
1237 if ((scp
->signo
== sip
->si_signo
) &&
1238 (scp
->code
== sip
->si_code
))
1240 name
= scp
->codename
;
1246 sprintf (locbuf
, "sigcode %u", sip
->si_signo
);
1256 struct sigcode
*scp
;
1259 for (scp
= siginfo_table
; scp
->codename
!= NULL
; scp
++)
1261 if ((scp
->signo
== sip
->si_signo
) &&
1262 (scp
->code
== sip
->si_code
))
1270 desc
= "Unrecognized signal or trap use";
1279 syscallname - translate a system call number into a system call name
1283 char *syscallname (int syscallnum)
1287 Given a system call number, translate it into the printable name
1288 of a system call, or into "syscall <num>" if it is an unknown
1293 syscallname (syscallnum
)
1296 static char locbuf
[32];
1298 if (syscallnum
>= 0 && syscallnum
< MAX_SYSCALLS
1299 && syscall_table
[syscallnum
] != NULL
)
1300 return syscall_table
[syscallnum
];
1303 sprintf (locbuf
, "syscall %u", syscallnum
);
1312 init_syscall_table - initialize syscall translation table
1316 void init_syscall_table (void)
1320 Dynamically initialize the translation table to convert system
1321 call numbers into printable system call names. Done once per
1322 gdb run, on initialization.
1326 This is awfully ugly, but preprocessor tricks to make it prettier
1327 tend to be nonportable.
1331 init_syscall_table ()
1333 #if defined (SYS_exit)
1334 syscall_table
[SYS_exit
] = "exit";
1336 #if defined (SYS_fork)
1337 syscall_table
[SYS_fork
] = "fork";
1339 #if defined (SYS_read)
1340 syscall_table
[SYS_read
] = "read";
1342 #if defined (SYS_write)
1343 syscall_table
[SYS_write
] = "write";
1345 #if defined (SYS_open)
1346 syscall_table
[SYS_open
] = "open";
1348 #if defined (SYS_close)
1349 syscall_table
[SYS_close
] = "close";
1351 #if defined (SYS_wait)
1352 syscall_table
[SYS_wait
] = "wait";
1354 #if defined (SYS_creat)
1355 syscall_table
[SYS_creat
] = "creat";
1357 #if defined (SYS_link)
1358 syscall_table
[SYS_link
] = "link";
1360 #if defined (SYS_unlink)
1361 syscall_table
[SYS_unlink
] = "unlink";
1363 #if defined (SYS_exec)
1364 syscall_table
[SYS_exec
] = "exec";
1366 #if defined (SYS_execv)
1367 syscall_table
[SYS_execv
] = "execv";
1369 #if defined (SYS_execve)
1370 syscall_table
[SYS_execve
] = "execve";
1372 #if defined (SYS_chdir)
1373 syscall_table
[SYS_chdir
] = "chdir";
1375 #if defined (SYS_time)
1376 syscall_table
[SYS_time
] = "time";
1378 #if defined (SYS_mknod)
1379 syscall_table
[SYS_mknod
] = "mknod";
1381 #if defined (SYS_chmod)
1382 syscall_table
[SYS_chmod
] = "chmod";
1384 #if defined (SYS_chown)
1385 syscall_table
[SYS_chown
] = "chown";
1387 #if defined (SYS_brk)
1388 syscall_table
[SYS_brk
] = "brk";
1390 #if defined (SYS_stat)
1391 syscall_table
[SYS_stat
] = "stat";
1393 #if defined (SYS_lseek)
1394 syscall_table
[SYS_lseek
] = "lseek";
1396 #if defined (SYS_getpid)
1397 syscall_table
[SYS_getpid
] = "getpid";
1399 #if defined (SYS_mount)
1400 syscall_table
[SYS_mount
] = "mount";
1402 #if defined (SYS_umount)
1403 syscall_table
[SYS_umount
] = "umount";
1405 #if defined (SYS_setuid)
1406 syscall_table
[SYS_setuid
] = "setuid";
1408 #if defined (SYS_getuid)
1409 syscall_table
[SYS_getuid
] = "getuid";
1411 #if defined (SYS_stime)
1412 syscall_table
[SYS_stime
] = "stime";
1414 #if defined (SYS_ptrace)
1415 syscall_table
[SYS_ptrace
] = "ptrace";
1417 #if defined (SYS_alarm)
1418 syscall_table
[SYS_alarm
] = "alarm";
1420 #if defined (SYS_fstat)
1421 syscall_table
[SYS_fstat
] = "fstat";
1423 #if defined (SYS_pause)
1424 syscall_table
[SYS_pause
] = "pause";
1426 #if defined (SYS_utime)
1427 syscall_table
[SYS_utime
] = "utime";
1429 #if defined (SYS_stty)
1430 syscall_table
[SYS_stty
] = "stty";
1432 #if defined (SYS_gtty)
1433 syscall_table
[SYS_gtty
] = "gtty";
1435 #if defined (SYS_access)
1436 syscall_table
[SYS_access
] = "access";
1438 #if defined (SYS_nice)
1439 syscall_table
[SYS_nice
] = "nice";
1441 #if defined (SYS_statfs)
1442 syscall_table
[SYS_statfs
] = "statfs";
1444 #if defined (SYS_sync)
1445 syscall_table
[SYS_sync
] = "sync";
1447 #if defined (SYS_kill)
1448 syscall_table
[SYS_kill
] = "kill";
1450 #if defined (SYS_fstatfs)
1451 syscall_table
[SYS_fstatfs
] = "fstatfs";
1453 #if defined (SYS_pgrpsys)
1454 syscall_table
[SYS_pgrpsys
] = "pgrpsys";
1456 #if defined (SYS_xenix)
1457 syscall_table
[SYS_xenix
] = "xenix";
1459 #if defined (SYS_dup)
1460 syscall_table
[SYS_dup
] = "dup";
1462 #if defined (SYS_pipe)
1463 syscall_table
[SYS_pipe
] = "pipe";
1465 #if defined (SYS_times)
1466 syscall_table
[SYS_times
] = "times";
1468 #if defined (SYS_profil)
1469 syscall_table
[SYS_profil
] = "profil";
1471 #if defined (SYS_plock)
1472 syscall_table
[SYS_plock
] = "plock";
1474 #if defined (SYS_setgid)
1475 syscall_table
[SYS_setgid
] = "setgid";
1477 #if defined (SYS_getgid)
1478 syscall_table
[SYS_getgid
] = "getgid";
1480 #if defined (SYS_signal)
1481 syscall_table
[SYS_signal
] = "signal";
1483 #if defined (SYS_msgsys)
1484 syscall_table
[SYS_msgsys
] = "msgsys";
1486 #if defined (SYS_sys3b)
1487 syscall_table
[SYS_sys3b
] = "sys3b";
1489 #if defined (SYS_sysi86)
1490 syscall_table
[SYS_sysi86
] = "sysi86";
1492 #if defined (SYS_acct)
1493 syscall_table
[SYS_acct
] = "acct";
1495 #if defined (SYS_shmsys)
1496 syscall_table
[SYS_shmsys
] = "shmsys";
1498 #if defined (SYS_semsys)
1499 syscall_table
[SYS_semsys
] = "semsys";
1501 #if defined (SYS_ioctl)
1502 syscall_table
[SYS_ioctl
] = "ioctl";
1504 #if defined (SYS_uadmin)
1505 syscall_table
[SYS_uadmin
] = "uadmin";
1507 #if defined (SYS_utssys)
1508 syscall_table
[SYS_utssys
] = "utssys";
1510 #if defined (SYS_fsync)
1511 syscall_table
[SYS_fsync
] = "fsync";
1513 #if defined (SYS_umask)
1514 syscall_table
[SYS_umask
] = "umask";
1516 #if defined (SYS_chroot)
1517 syscall_table
[SYS_chroot
] = "chroot";
1519 #if defined (SYS_fcntl)
1520 syscall_table
[SYS_fcntl
] = "fcntl";
1522 #if defined (SYS_ulimit)
1523 syscall_table
[SYS_ulimit
] = "ulimit";
1525 #if defined (SYS_rfsys)
1526 syscall_table
[SYS_rfsys
] = "rfsys";
1528 #if defined (SYS_rmdir)
1529 syscall_table
[SYS_rmdir
] = "rmdir";
1531 #if defined (SYS_mkdir)
1532 syscall_table
[SYS_mkdir
] = "mkdir";
1534 #if defined (SYS_getdents)
1535 syscall_table
[SYS_getdents
] = "getdents";
1537 #if defined (SYS_sysfs)
1538 syscall_table
[SYS_sysfs
] = "sysfs";
1540 #if defined (SYS_getmsg)
1541 syscall_table
[SYS_getmsg
] = "getmsg";
1543 #if defined (SYS_putmsg)
1544 syscall_table
[SYS_putmsg
] = "putmsg";
1546 #if defined (SYS_poll)
1547 syscall_table
[SYS_poll
] = "poll";
1549 #if defined (SYS_lstat)
1550 syscall_table
[SYS_lstat
] = "lstat";
1552 #if defined (SYS_symlink)
1553 syscall_table
[SYS_symlink
] = "symlink";
1555 #if defined (SYS_readlink)
1556 syscall_table
[SYS_readlink
] = "readlink";
1558 #if defined (SYS_setgroups)
1559 syscall_table
[SYS_setgroups
] = "setgroups";
1561 #if defined (SYS_getgroups)
1562 syscall_table
[SYS_getgroups
] = "getgroups";
1564 #if defined (SYS_fchmod)
1565 syscall_table
[SYS_fchmod
] = "fchmod";
1567 #if defined (SYS_fchown)
1568 syscall_table
[SYS_fchown
] = "fchown";
1570 #if defined (SYS_sigprocmask)
1571 syscall_table
[SYS_sigprocmask
] = "sigprocmask";
1573 #if defined (SYS_sigsuspend)
1574 syscall_table
[SYS_sigsuspend
] = "sigsuspend";
1576 #if defined (SYS_sigaltstack)
1577 syscall_table
[SYS_sigaltstack
] = "sigaltstack";
1579 #if defined (SYS_sigaction)
1580 syscall_table
[SYS_sigaction
] = "sigaction";
1582 #if defined (SYS_sigpending)
1583 syscall_table
[SYS_sigpending
] = "sigpending";
1585 #if defined (SYS_context)
1586 syscall_table
[SYS_context
] = "context";
1588 #if defined (SYS_evsys)
1589 syscall_table
[SYS_evsys
] = "evsys";
1591 #if defined (SYS_evtrapret)
1592 syscall_table
[SYS_evtrapret
] = "evtrapret";
1594 #if defined (SYS_statvfs)
1595 syscall_table
[SYS_statvfs
] = "statvfs";
1597 #if defined (SYS_fstatvfs)
1598 syscall_table
[SYS_fstatvfs
] = "fstatvfs";
1600 #if defined (SYS_nfssys)
1601 syscall_table
[SYS_nfssys
] = "nfssys";
1603 #if defined (SYS_waitsys)
1604 syscall_table
[SYS_waitsys
] = "waitsys";
1606 #if defined (SYS_sigsendsys)
1607 syscall_table
[SYS_sigsendsys
] = "sigsendsys";
1609 #if defined (SYS_hrtsys)
1610 syscall_table
[SYS_hrtsys
] = "hrtsys";
1612 #if defined (SYS_acancel)
1613 syscall_table
[SYS_acancel
] = "acancel";
1615 #if defined (SYS_async)
1616 syscall_table
[SYS_async
] = "async";
1618 #if defined (SYS_priocntlsys)
1619 syscall_table
[SYS_priocntlsys
] = "priocntlsys";
1621 #if defined (SYS_pathconf)
1622 syscall_table
[SYS_pathconf
] = "pathconf";
1624 #if defined (SYS_mincore)
1625 syscall_table
[SYS_mincore
] = "mincore";
1627 #if defined (SYS_mmap)
1628 syscall_table
[SYS_mmap
] = "mmap";
1630 #if defined (SYS_mprotect)
1631 syscall_table
[SYS_mprotect
] = "mprotect";
1633 #if defined (SYS_munmap)
1634 syscall_table
[SYS_munmap
] = "munmap";
1636 #if defined (SYS_fpathconf)
1637 syscall_table
[SYS_fpathconf
] = "fpathconf";
1639 #if defined (SYS_vfork)
1640 syscall_table
[SYS_vfork
] = "vfork";
1642 #if defined (SYS_fchdir)
1643 syscall_table
[SYS_fchdir
] = "fchdir";
1645 #if defined (SYS_readv)
1646 syscall_table
[SYS_readv
] = "readv";
1648 #if defined (SYS_writev)
1649 syscall_table
[SYS_writev
] = "writev";
1651 #if defined (SYS_xstat)
1652 syscall_table
[SYS_xstat
] = "xstat";
1654 #if defined (SYS_lxstat)
1655 syscall_table
[SYS_lxstat
] = "lxstat";
1657 #if defined (SYS_fxstat)
1658 syscall_table
[SYS_fxstat
] = "fxstat";
1660 #if defined (SYS_xmknod)
1661 syscall_table
[SYS_xmknod
] = "xmknod";
1663 #if defined (SYS_clocal)
1664 syscall_table
[SYS_clocal
] = "clocal";
1666 #if defined (SYS_setrlimit)
1667 syscall_table
[SYS_setrlimit
] = "setrlimit";
1669 #if defined (SYS_getrlimit)
1670 syscall_table
[SYS_getrlimit
] = "getrlimit";
1672 #if defined (SYS_lchown)
1673 syscall_table
[SYS_lchown
] = "lchown";
1675 #if defined (SYS_memcntl)
1676 syscall_table
[SYS_memcntl
] = "memcntl";
1678 #if defined (SYS_getpmsg)
1679 syscall_table
[SYS_getpmsg
] = "getpmsg";
1681 #if defined (SYS_putpmsg)
1682 syscall_table
[SYS_putpmsg
] = "putpmsg";
1684 #if defined (SYS_rename)
1685 syscall_table
[SYS_rename
] = "rename";
1687 #if defined (SYS_uname)
1688 syscall_table
[SYS_uname
] = "uname";
1690 #if defined (SYS_setegid)
1691 syscall_table
[SYS_setegid
] = "setegid";
1693 #if defined (SYS_sysconfig)
1694 syscall_table
[SYS_sysconfig
] = "sysconfig";
1696 #if defined (SYS_adjtime)
1697 syscall_table
[SYS_adjtime
] = "adjtime";
1699 #if defined (SYS_systeminfo)
1700 syscall_table
[SYS_systeminfo
] = "systeminfo";
1702 #if defined (SYS_seteuid)
1703 syscall_table
[SYS_seteuid
] = "seteuid";
1705 #if defined (SYS_sproc)
1706 syscall_table
[SYS_sproc
] = "sproc";
1708 #if defined (SYS_keyctl)
1709 syscall_table
[SYS_keyctl
] = "keyctl";
1711 #if defined (SYS_secsys)
1712 syscall_table
[SYS_secsys
] = "secsys";
1714 #if defined (SYS_filepriv)
1715 syscall_table
[SYS_filepriv
] = "filepriv";
1717 #if defined (SYS_procpriv)
1718 syscall_table
[SYS_procpriv
] = "procpriv";
1720 #if defined (SYS_devstat)
1721 syscall_table
[SYS_devstat
] = "devstat";
1723 #if defined (SYS_aclipc)
1724 syscall_table
[SYS_aclipc
] = "aclipc";
1726 #if defined (SYS_fdevstat)
1727 syscall_table
[SYS_fdevstat
] = "fdevstat";
1729 #if defined (SYS_flvlfile)
1730 syscall_table
[SYS_flvlfile
] = "flvlfile";
1732 #if defined (SYS_lvlfile)
1733 syscall_table
[SYS_lvlfile
] = "lvlfile";
1735 #if defined (SYS_lvlequal)
1736 syscall_table
[SYS_lvlequal
] = "lvlequal";
1738 #if defined (SYS_lvlproc)
1739 syscall_table
[SYS_lvlproc
] = "lvlproc";
1741 #if defined (SYS_lvlipc)
1742 syscall_table
[SYS_lvlipc
] = "lvlipc";
1744 #if defined (SYS_acl)
1745 syscall_table
[SYS_acl
] = "acl";
1747 #if defined (SYS_auditevt)
1748 syscall_table
[SYS_auditevt
] = "auditevt";
1750 #if defined (SYS_auditctl)
1751 syscall_table
[SYS_auditctl
] = "auditctl";
1753 #if defined (SYS_auditdmp)
1754 syscall_table
[SYS_auditdmp
] = "auditdmp";
1756 #if defined (SYS_auditlog)
1757 syscall_table
[SYS_auditlog
] = "auditlog";
1759 #if defined (SYS_auditbuf)
1760 syscall_table
[SYS_auditbuf
] = "auditbuf";
1762 #if defined (SYS_lvldom)
1763 syscall_table
[SYS_lvldom
] = "lvldom";
1765 #if defined (SYS_lvlvfs)
1766 syscall_table
[SYS_lvlvfs
] = "lvlvfs";
1768 #if defined (SYS_mkmld)
1769 syscall_table
[SYS_mkmld
] = "mkmld";
1771 #if defined (SYS_mldmode)
1772 syscall_table
[SYS_mldmode
] = "mldmode";
1774 #if defined (SYS_secadvise)
1775 syscall_table
[SYS_secadvise
] = "secadvise";
1777 #if defined (SYS_online)
1778 syscall_table
[SYS_online
] = "online";
1780 #if defined (SYS_setitimer)
1781 syscall_table
[SYS_setitimer
] = "setitimer";
1783 #if defined (SYS_getitimer)
1784 syscall_table
[SYS_getitimer
] = "getitimer";
1786 #if defined (SYS_gettimeofday)
1787 syscall_table
[SYS_gettimeofday
] = "gettimeofday";
1789 #if defined (SYS_settimeofday)
1790 syscall_table
[SYS_settimeofday
] = "settimeofday";
1792 #if defined (SYS_lwp_create)
1793 syscall_table
[SYS_lwp_create
] = "_lwp_create";
1795 #if defined (SYS_lwp_exit)
1796 syscall_table
[SYS_lwp_exit
] = "_lwp_exit";
1798 #if defined (SYS_lwp_wait)
1799 syscall_table
[SYS_lwp_wait
] = "_lwp_wait";
1801 #if defined (SYS_lwp_self)
1802 syscall_table
[SYS_lwp_self
] = "_lwp_self";
1804 #if defined (SYS_lwp_info)
1805 syscall_table
[SYS_lwp_info
] = "_lwp_info";
1807 #if defined (SYS_lwp_private)
1808 syscall_table
[SYS_lwp_private
] = "_lwp_private";
1810 #if defined (SYS_processor_bind)
1811 syscall_table
[SYS_processor_bind
] = "processor_bind";
1813 #if defined (SYS_processor_exbind)
1814 syscall_table
[SYS_processor_exbind
] = "processor_exbind";
1816 #if defined (SYS_prepblock)
1817 syscall_table
[SYS_prepblock
] = "prepblock";
1819 #if defined (SYS_block)
1820 syscall_table
[SYS_block
] = "block";
1822 #if defined (SYS_rdblock)
1823 syscall_table
[SYS_rdblock
] = "rdblock";
1825 #if defined (SYS_unblock)
1826 syscall_table
[SYS_unblock
] = "unblock";
1828 #if defined (SYS_cancelblock)
1829 syscall_table
[SYS_cancelblock
] = "cancelblock";
1831 #if defined (SYS_pread)
1832 syscall_table
[SYS_pread
] = "pread";
1834 #if defined (SYS_pwrite)
1835 syscall_table
[SYS_pwrite
] = "pwrite";
1837 #if defined (SYS_truncate)
1838 syscall_table
[SYS_truncate
] = "truncate";
1840 #if defined (SYS_ftruncate)
1841 syscall_table
[SYS_ftruncate
] = "ftruncate";
1843 #if defined (SYS_lwp_kill)
1844 syscall_table
[SYS_lwp_kill
] = "_lwp_kill";
1846 #if defined (SYS_sigwait)
1847 syscall_table
[SYS_sigwait
] = "sigwait";
1849 #if defined (SYS_fork1)
1850 syscall_table
[SYS_fork1
] = "fork1";
1852 #if defined (SYS_forkall)
1853 syscall_table
[SYS_forkall
] = "forkall";
1855 #if defined (SYS_modload)
1856 syscall_table
[SYS_modload
] = "modload";
1858 #if defined (SYS_moduload)
1859 syscall_table
[SYS_moduload
] = "moduload";
1861 #if defined (SYS_modpath)
1862 syscall_table
[SYS_modpath
] = "modpath";
1864 #if defined (SYS_modstat)
1865 syscall_table
[SYS_modstat
] = "modstat";
1867 #if defined (SYS_modadm)
1868 syscall_table
[SYS_modadm
] = "modadm";
1870 #if defined (SYS_getksym)
1871 syscall_table
[SYS_getksym
] = "getksym";
1873 #if defined (SYS_lwp_suspend)
1874 syscall_table
[SYS_lwp_suspend
] = "_lwp_suspend";
1876 #if defined (SYS_lwp_continue)
1877 syscall_table
[SYS_lwp_continue
] = "_lwp_continue";
1879 #if defined (SYS_priocntllst)
1880 syscall_table
[SYS_priocntllst
] = "priocntllst";
1882 #if defined (SYS_sleep)
1883 syscall_table
[SYS_sleep
] = "sleep";
1885 #if defined (SYS_lwp_sema_wait)
1886 syscall_table
[SYS_lwp_sema_wait
] = "_lwp_sema_wait";
1888 #if defined (SYS_lwp_sema_post)
1889 syscall_table
[SYS_lwp_sema_post
] = "_lwp_sema_post";
1891 #if defined (SYS_lwp_sema_trywait)
1892 syscall_table
[SYS_lwp_sema_trywait
] = "lwp_sema_trywait";
1894 #if defined(SYS_fstatvfs64)
1895 syscall_table
[SYS_fstatvfs64
] = "fstatvfs64";
1897 #if defined(SYS_statvfs64)
1898 syscall_table
[SYS_statvfs64
] = "statvfs64";
1900 #if defined(SYS_ftruncate64)
1901 syscall_table
[SYS_ftruncate64
] = "ftruncate64";
1903 #if defined(SYS_truncate64)
1904 syscall_table
[SYS_truncate64
] = "truncate64";
1906 #if defined(SYS_getrlimit64)
1907 syscall_table
[SYS_getrlimit64
] = "getrlimit64";
1909 #if defined(SYS_setrlimit64)
1910 syscall_table
[SYS_setrlimit64
] = "setrlimit64";
1912 #if defined(SYS_lseek64)
1913 syscall_table
[SYS_lseek64
] = "lseek64";
1915 #if defined(SYS_mmap64)
1916 syscall_table
[SYS_mmap64
] = "mmap64";
1918 #if defined(SYS_pread64)
1919 syscall_table
[SYS_pread64
] = "pread64";
1921 #if defined(SYS_creat64)
1922 syscall_table
[SYS_creat64
] = "creat64";
1924 #if defined(SYS_dshmsys)
1925 syscall_table
[SYS_dshmsys
] = "dshmsys";
1927 #if defined(SYS_invlpg)
1928 syscall_table
[SYS_invlpg
] = "invlpg";
1930 #if defined(SYS_cg_ids)
1931 syscall_table
[SYS_cg_ids
] = "cg_ids";
1933 #if defined(SYS_cg_processors)
1934 syscall_table
[SYS_cg_processors
] = "cg_processors";
1936 #if defined(SYS_cg_info)
1937 syscall_table
[SYS_cg_info
] = "cg_info";
1939 #if defined(SYS_cg_bind)
1940 syscall_table
[SYS_cg_bind
] = "cg_bind";
1942 #if defined(SYS_cg_current)
1943 syscall_table
[SYS_cg_current
] = "cg_current";
1945 #if defined(SYS_cg_memloc)
1946 syscall_table
[SYS_cg_memloc
] = "cg_memloc";
1954 procfs_kill_inferior - kill any current inferior
1958 void procfs_kill_inferior (void)
1962 Kill any current inferior.
1966 Kills even attached inferiors. Presumably the user has already
1967 been prompted that the inferior is an attached one rather than
1968 one started by gdb. (FIXME?)
1973 procfs_kill_inferior ()
1975 target_mourn_inferior ();
1982 unconditionally_kill_inferior - terminate the inferior
1986 static void unconditionally_kill_inferior (struct procinfo *)
1990 Kill the specified inferior.
1994 A possibly useful enhancement would be to first try sending
1995 the inferior a terminate signal, politely asking it to commit
1996 suicide, before we murder it (we could call that
1997 politely_kill_inferior()).
2002 unconditionally_kill_inferior (pi
)
2003 struct procinfo
*pi
;
2007 ppid
= pi
->prstatus
.pr_ppid
;
2009 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
2010 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
2011 before the PIOCKILL, otherwise it might generate a corrupted core
2012 file for the inferior. */
2013 ioctl (pi
->ctl_fd
, PIOCSSIG
, NULL
);
2015 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
2016 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
2017 to kill the inferior, otherwise it might remain stopped with a
2019 We do not check the result of the PIOCSSIG, the inferior might have
2022 struct siginfo newsiginfo
;
2024 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
2025 newsiginfo
.si_signo
= SIGKILL
;
2026 newsiginfo
.si_code
= 0;
2027 newsiginfo
.si_errno
= 0;
2028 newsiginfo
.si_pid
= getpid ();
2029 newsiginfo
.si_uid
= getuid ();
2030 ioctl (pi
->ctl_fd
, PIOCSSIG
, &newsiginfo
);
2032 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
2033 procfs_write_pckill (pi
);
2034 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
2036 close_proc_file (pi
);
2038 /* Only wait() for our direct children. Our grandchildren zombies are killed
2039 by the death of their parents. */
2041 if (ppid
== getpid ())
2049 procfs_xfer_memory -- copy data to or from inferior memory space
2053 int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
2054 int dowrite, struct target_ops target)
2058 Copy LEN bytes to/from inferior's memory starting at MEMADDR
2059 from/to debugger memory starting at MYADDR. Copy from inferior
2060 if DOWRITE is zero or to inferior if DOWRITE is nonzero.
2062 Returns the length copied, which is either the LEN argument or
2063 zero. This xfer function does not do partial moves, since procfs_ops
2064 doesn't allow memory operations to cross below us in the target stack
2069 The /proc interface makes this an almost trivial task.
2073 procfs_xfer_memory (memaddr
, myaddr
, len
, dowrite
, target
)
2078 struct target_ops
*target
; /* ignored */
2081 struct procinfo
*pi
;
2083 pi
= current_procinfo
;
2085 if (lseek (pi
->as_fd
, (off_t
) memaddr
, SEEK_SET
) == (off_t
) memaddr
)
2089 nbytes
= write (pi
->as_fd
, myaddr
, len
);
2093 nbytes
= read (pi
->as_fd
, myaddr
, len
);
2107 procfs_store_registers -- copy register values back to inferior
2111 void procfs_store_registers (int regno)
2115 Store our current register values back into the inferior. If
2116 REGNO is -1 then store all the register, otherwise store just
2117 the value specified by REGNO.
2121 If we are storing only a single register, we first have to get all
2122 the current values from the process, overwrite the desired register
2123 in the gregset with the one we want from gdb's registers, and then
2124 send the whole set back to the process. For writing all the
2125 registers, all we have to do is generate the gregset and send it to
2128 Also note that the process has to be stopped on an event of interest
2129 for this to work, which basically means that it has to have been
2130 run under the control of one of the other /proc ioctl calls and not
2131 ptrace. Since we don't use ptrace anyway, we don't worry about this
2132 fine point, but it is worth noting for future reference.
2134 Gdb is confused about what this function is supposed to return.
2135 Some versions return a value, others return nothing. Some are
2136 declared to return a value and actually return nothing. Gdb ignores
2137 anything returned. (FIXME)
2142 procfs_store_registers (regno
)
2145 struct procinfo
*pi
;
2146 #ifdef PROCFS_USE_READ_WRITE
2147 struct greg_ctl greg
;
2148 struct fpreg_ctl fpreg
;
2151 pi
= current_procinfo
;
2153 #ifdef PROCFS_USE_READ_WRITE
2156 procfs_read_status (pi
);
2157 memcpy ((char *) &greg
.gregset
,
2158 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
,
2159 sizeof (gdb_gregset_t
));
2161 fill_gregset (&greg
.gregset
, regno
);
2163 write (pi
->ctl_fd
, &greg
, sizeof (greg
));
2164 #else /* PROCFS_USE_READ_WRITE */
2167 ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
);
2169 fill_gregset (&pi
->gregset
.gregset
, regno
);
2170 ioctl (pi
->ctl_fd
, PIOCSREG
, &pi
->gregset
.gregset
);
2171 #endif /* PROCFS_USE_READ_WRITE */
2173 #if defined (FP0_REGNUM)
2175 /* Now repeat everything using the floating point register set, if the
2176 target has floating point hardware. Since we ignore the returned value,
2177 we'll never know whether it worked or not anyway. */
2179 #ifdef PROCFS_USE_READ_WRITE
2182 procfs_read_status (pi
);
2183 memcpy ((char *) &fpreg
.fpregset
,
2184 (char *) &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
,
2185 sizeof (gdb_fpregset_t
));
2187 fill_fpregset (&fpreg
.fpregset
, regno
);
2188 fpreg
.cmd
= PCSFPREG
;
2189 write (pi
->ctl_fd
, &fpreg
, sizeof (fpreg
));
2190 #else /* PROCFS_USE_READ_WRITE */
2193 ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
);
2195 fill_fpregset (&pi
->fpregset
.fpregset
, regno
);
2196 ioctl (pi
->ctl_fd
, PIOCSFPREG
, &pi
->fpregset
.fpregset
);
2197 #endif /* PROCFS_USE_READ_WRITE */
2199 #endif /* FP0_REGNUM */
2207 init_procinfo - setup a procinfo struct and connect it to a process
2211 struct procinfo * init_procinfo (int pid)
2215 Allocate a procinfo structure, open the /proc file and then set up the
2216 set of signals and faults that are to be traced. Returns a pointer to
2217 the new procinfo structure.
2221 If proc_init_failed ever gets called, control returns to the command
2222 processing loop via the standard error handling code.
2226 static struct procinfo
*
2227 init_procinfo (pid
, kill
)
2231 struct procinfo
*pi
= (struct procinfo
*)
2232 xmalloc (sizeof (struct procinfo
));
2234 struct sig_ctl sctl
;
2235 #endif /* UNIXWARE */
2237 memset ((char *) pi
, 0, sizeof (*pi
));
2238 if (!open_proc_file (pid
, pi
, O_RDWR
, 1))
2239 proc_init_failed (pi
, "can't open process file", kill
);
2241 /* open_proc_file may modify pid. */
2245 /* Add new process to process info list */
2247 pi
->next
= procinfo_list
;
2250 add_fd (pi
); /* Add to list for poll/select */
2252 /* Remember some things about the inferior that we will, or might, change
2253 so that we can restore them when we detach. */
2255 memcpy ((char *) &pi
->saved_trace
.sigset
,
2256 (char *) &pi
->prstatus
.pr_sigtrace
, sizeof (sigset_t
));
2257 memcpy ((char *) &pi
->saved_fltset
.fltset
,
2258 (char *) &pi
->prstatus
.pr_flttrace
, sizeof (fltset_t
));
2259 memcpy ((char *) &pi
->saved_entryset
.sysset
,
2260 (char *) &pi
->prstatus
.pr_sysentry
, sizeof (sysset_t
));
2261 memcpy ((char *) &pi
->saved_exitset
.sysset
,
2262 (char *) &pi
->prstatus
.pr_sysexit
, sizeof (sysset_t
));
2264 /* Set up trace and fault sets, as gdb expects them. */
2266 prfillset (&sctl
.sigset
);
2267 notice_signals (pi
, &sctl
);
2268 #else /* ! UNIXWARE */
2269 ioctl (pi
->ctl_fd
, PIOCGTRACE
, &pi
->saved_trace
.sigset
);
2270 ioctl (pi
->ctl_fd
, PIOCGHOLD
, &pi
->saved_sighold
.sigset
);
2271 ioctl (pi
->ctl_fd
, PIOCGFAULT
, &pi
->saved_fltset
.fltset
);
2272 ioctl (pi
->ctl_fd
, PIOCGENTRY
, &pi
->saved_entryset
.sysset
);
2273 ioctl (pi
->ctl_fd
, PIOCGEXIT
, &pi
->saved_exitset
.sysset
);
2275 /* Set up trace and fault sets, as gdb expects them. */
2277 memset ((char *) &pi
->prrun
, 0, sizeof (pi
->prrun
));
2278 prfillset (&pi
->prrun
.pr_trace
);
2279 procfs_notice_signals (pid
);
2280 #endif /* UNIXWARE */
2282 if (!procfs_read_status (pi
))
2283 proc_init_failed (pi
, "procfs_read_status failed", kill
);
2292 create_procinfo - initialize access to a /proc entry
2296 struct procinfo * create_procinfo (int pid)
2300 Allocate a procinfo structure, open the /proc file and then set up the
2301 set of signals and faults that are to be traced. Returns a pointer to
2302 the new procinfo structure.
2306 If proc_init_failed ever gets called, control returns to the command
2307 processing loop via the standard error handling code.
2311 static struct procinfo
*
2312 create_procinfo (pid
)
2315 struct procinfo
*pi
;
2316 #ifdef PROCFS_USE_READ_WRITE
2317 struct flt_ctl fctl
;
2320 pi
= find_procinfo (pid
, 1);
2322 return pi
; /* All done! It already exists */
2324 pi
= init_procinfo (pid
, 1);
2327 /* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
2328 already stopped, even if they all have PR_ASYNC set. */
2329 if (!(pi
->prstatus
.pr_flags
& PR_STOPPED
))
2331 if (!procfs_write_pcwstop (pi
))
2332 proc_init_failed (pi
, "procfs_write_pcwstop failed", 1);
2334 #ifdef PROCFS_USE_READ_WRITE
2335 fctl
.cmd
= PCSFAULT
;
2336 prfillset (&fctl
.fltset
);
2337 prdelset (&fctl
.fltset
, FLTPAGE
);
2339 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
2340 proc_init_failed (pi
, "PCSFAULT failed", 1);
2342 prfillset (&pi
->prrun
.pr_fault
);
2343 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
2344 #ifdef PROCFS_DONT_TRACE_FAULTS
2345 premptyset (&pi
->prrun
.pr_fault
);
2347 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
) < 0)
2348 proc_init_failed (pi
, "PIOCSFAULT failed", 1);
2358 procfs_exit_handler - handle entry into the _exit syscall
2362 int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
2366 This routine is called when an inferior process enters the _exit()
2367 system call. It continues the process, and then collects the exit
2368 status and pid which are returned in *statvalp and *rtnvalp. After
2369 that it returns non-zero to indicate that procfs_wait should wake up.
2372 There is probably a better way to do this.
2377 procfs_exit_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2378 struct procinfo
*pi
;
2384 struct procinfo
*temp_pi
, *next_pi
;
2385 #if defined (UNIXWARE) || defined (PROCFS_USE_READ_WRITE)
2386 struct proc_ctl pctl
;
2391 pctl
.data
= PRCFAULT
;
2393 pi
->prrun
.pr_flags
= PRCFAULT
;
2396 #ifdef PROCFS_USE_READ_WRITE
2397 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
2399 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2401 perror_with_name (pi
->pathname
);
2405 /* Claim it exited (don't call wait). */
2407 printf_filtered ("(attached process has exited)\n");
2409 *rtnvalp
= inferior_pid
;
2413 *rtnvalp
= wait (statvalp
);
2418 /* Close ALL open proc file handles,
2419 except the one that called SYS_exit. */
2420 for (temp_pi
= procinfo_list
; temp_pi
; temp_pi
= next_pi
)
2422 next_pi
= temp_pi
->next
;
2424 continue; /* Handled below */
2425 close_proc_file (temp_pi
);
2434 procfs_exec_handler - handle exit from the exec family of syscalls
2438 int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
2442 This routine is called when an inferior process is about to finish any
2443 of the exec() family of system calls. It pretends that we got a
2444 SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
2445 to tell procfs_wait to wake up.
2448 This need for compatibility with ptrace is questionable. In the
2449 future, it shouldn't be necessary.
2454 procfs_exec_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2455 struct procinfo
*pi
;
2461 *statvalp
= (SIGTRAP
<< 8) | 0177;
2466 #if defined(SYS_sproc) && !defined(UNIXWARE)
2467 /* IRIX lwp creation system call */
2473 procfs_sproc_handler - handle exit from the sproc syscall
2477 int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
2481 This routine is called when an inferior process is about to finish an
2482 sproc() system call. This is the system call that IRIX uses to create
2483 a lightweight process. When the target process gets this event, we can
2484 look at rval1 to find the new child processes ID, and create a new
2485 procinfo struct from that.
2487 After that, it pretends that we got a SIGTRAP, and returns non-zero
2488 to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
2489 woken up, sees the new process and continues it.
2492 We actually never see the child exiting from sproc because we will
2493 shortly stop the child with PIOCSTOP, which is then registered as the
2498 procfs_sproc_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2499 struct procinfo
*pi
;
2505 /* We've just detected the completion of an sproc system call. Now we need to
2506 setup a procinfo struct for this thread, and notify the thread system of the
2509 /* If sproc failed, then nothing interesting happened. Continue the process
2510 and go back to sleep. */
2512 if (pi
->prstatus
.pr_errno
!= 0)
2514 pi
->prrun
.pr_flags
&= PRSTEP
;
2515 pi
->prrun
.pr_flags
|= PRCFAULT
;
2517 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2518 perror_with_name (pi
->pathname
);
2523 /* At this point, the new thread is stopped at it's first instruction, and
2524 the parent is stopped at the exit from sproc. */
2526 /* Notify the caller of the arrival of a new thread. */
2527 create_procinfo (pi
->prstatus
.pr_rval1
);
2529 *rtnvalp
= pi
->prstatus
.pr_rval1
;
2530 *statvalp
= (SIGTRAP
<< 8) | 0177;
2539 procfs_fork_handler - handle exit from the fork syscall
2543 int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
2547 This routine is called when an inferior process is about to finish a
2548 fork() system call. We will open up the new process, and then close
2549 it, which releases it from the clutches of the debugger.
2551 After that, we continue the target process as though nothing had
2555 This is necessary for IRIX because we have to set PR_FORK in order
2556 to catch the creation of lwps (via sproc()). When an actual fork
2557 occurs, it becomes necessary to reset the forks debugger flags and
2558 continue it because we can't hack multiple processes yet.
2562 procfs_fork_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
2563 struct procinfo
*pi
;
2569 struct procinfo
*pitemp
;
2571 /* At this point, we've detected the completion of a fork (or vfork) call in
2572 our child. The grandchild is also stopped because we set inherit-on-fork
2573 earlier. (Note that nobody has the grandchilds' /proc file open at this
2574 point.) We will release the grandchild from the debugger by opening it's
2575 /proc file and then closing it. Since run-on-last-close is set, the
2576 grandchild continues on its' merry way. */
2579 pitemp
= create_procinfo (pi
->prstatus
.pr_rval1
);
2581 close_proc_file (pitemp
);
2583 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
2584 perror_with_name (pi
->pathname
);
2588 #endif /* SYS_sproc && !UNIXWARE */
2594 procfs_set_inferior_syscall_traps - setup the syscall traps
2598 void procfs_set_inferior_syscall_traps (struct procinfo *pip)
2602 Called for each "procinfo" (process, thread, or LWP) in the
2603 inferior, to register for notification of and handlers for
2604 syscall traps in the inferior.
2609 procfs_set_inferior_syscall_traps (pip
)
2610 struct procinfo
*pip
;
2612 procfs_set_syscall_trap (pip
, SYS_exit
, PROCFS_SYSCALL_ENTRY
,
2613 procfs_exit_handler
);
2615 #ifndef PRFS_STOPEXEC
2617 procfs_set_syscall_trap (pip
, SYS_exec
, PROCFS_SYSCALL_EXIT
,
2618 procfs_exec_handler
);
2621 procfs_set_syscall_trap (pip
, SYS_execv
, PROCFS_SYSCALL_EXIT
,
2622 procfs_exec_handler
);
2625 procfs_set_syscall_trap (pip
, SYS_execve
, PROCFS_SYSCALL_EXIT
,
2626 procfs_exec_handler
);
2628 #endif /* PRFS_STOPEXEC */
2630 /* Setup traps on exit from sproc() */
2633 procfs_set_syscall_trap (pip
, SYS_sproc
, PROCFS_SYSCALL_EXIT
,
2634 procfs_sproc_handler
);
2635 procfs_set_syscall_trap (pip
, SYS_fork
, PROCFS_SYSCALL_EXIT
,
2636 procfs_fork_handler
);
2638 procfs_set_syscall_trap (pip
, SYS_vfork
, PROCFS_SYSCALL_EXIT
,
2639 procfs_fork_handler
);
2641 /* Turn on inherit-on-fork flag so that all children of the target process
2642 start with tracing flags set. This allows us to trap lwp creation. Note
2643 that we also have to trap on fork and vfork in order to disable all tracing
2644 in the targets child processes. */
2646 modify_inherit_on_fork_flag (pip
->ctl_fd
, 1);
2649 #ifdef SYS_lwp_create
2650 procfs_set_syscall_trap (pip
, SYS_lwp_create
, PROCFS_SYSCALL_EXIT
,
2651 procfs_lwp_creation_handler
);
2659 procfs_init_inferior - initialize target vector and access to a
2664 void procfs_init_inferior (int pid)
2668 When gdb starts an inferior, this function is called in the parent
2669 process immediately after the fork. It waits for the child to stop
2670 on the return from the exec system call (the child itself takes care
2671 of ensuring that this is set up), then sets up the set of signals
2672 and faults that are to be traced. Returns the pid, which may have had
2673 the thread-id added to it.
2677 If proc_init_failed ever gets called, control returns to the command
2678 processing loop via the standard error handling code.
2683 procfs_init_inferior (pid
)
2686 struct procinfo
*pip
;
2688 push_target (&procfs_ops
);
2690 pip
= create_procinfo (pid
);
2692 procfs_set_inferior_syscall_traps (pip
);
2694 /* create_procinfo may change the pid, so we have to update inferior_pid
2695 here before calling other gdb routines that need the right pid. */
2700 add_thread (pip
->pid
); /* Setup initial thread */
2702 #ifdef START_INFERIOR_TRAPS_EXPECTED
2703 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
2705 /* One trap to exec the shell, one to exec the program being debugged. */
2706 startup_inferior (2);
2714 procfs_notice_signals
2718 static void procfs_notice_signals (int pid);
2722 When the user changes the state of gdb's signal handling via the
2723 "handle" command, this function gets called to see if any change
2724 in the /proc interface is required. It is also called internally
2725 by other /proc interface functions to initialize the state of
2726 the traced signal set.
2728 One thing it does is that signals for which the state is "nostop",
2729 "noprint", and "pass", have their trace bits reset in the pr_trace
2730 field, so that they are no longer traced. This allows them to be
2731 delivered directly to the inferior without the debugger ever being
2736 procfs_notice_signals (pid
)
2739 struct procinfo
*pi
;
2740 struct sig_ctl sctl
;
2742 pi
= find_procinfo (pid
, 0);
2744 #ifndef HAVE_PRRUN_T
2745 premptyset (&sctl
.sigset
);
2747 sctl
.sigset
= pi
->prrun
.pr_trace
;
2750 notice_signals (pi
, &sctl
);
2753 pi
->prrun
.pr_trace
= sctl
.sigset
;
2758 notice_signals (pi
, sctl
)
2759 struct procinfo
*pi
;
2760 struct sig_ctl
*sctl
;
2764 for (signo
= 0; signo
< NSIG
; signo
++)
2766 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
2767 signal_print_state (target_signal_from_host (signo
)) == 0 &&
2768 signal_pass_state (target_signal_from_host (signo
)) == 1)
2770 prdelset (&sctl
->sigset
, signo
);
2774 praddset (&sctl
->sigset
, signo
);
2777 #ifdef PROCFS_USE_READ_WRITE
2778 sctl
->cmd
= PCSTRACE
;
2779 if (write (pi
->ctl_fd
, (char *) sctl
, sizeof (struct sig_ctl
)) < 0)
2781 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &sctl
->sigset
))
2784 print_sys_errmsg ("PIOCSTRACE failed", errno
);
2792 proc_set_exec_trap -- arrange for exec'd child to halt at startup
2796 void proc_set_exec_trap (void)
2800 This function is called in the child process when starting up
2801 an inferior, prior to doing the exec of the actual inferior.
2802 It sets the child process's exitset to make exit from the exec
2803 system call an event of interest to stop on, and then simply
2804 returns. The child does the exec, the system call returns, and
2805 the child stops at the first instruction, ready for the gdb
2806 parent process to take control of it.
2810 We need to use all local variables since the child may be sharing
2811 it's data space with the parent, if vfork was used rather than
2814 Also note that we want to turn off the inherit-on-fork flag in
2815 the child process so that any grand-children start with all
2816 tracing flags cleared.
2820 proc_set_exec_trap ()
2822 struct sys_ctl exitset
;
2823 struct sys_ctl entryset
;
2824 char procname
[MAX_PROC_NAME_SIZE
];
2827 sprintf (procname
, CTL_PROC_NAME_FMT
, getpid ());
2829 if ((fd
= open (procname
, O_WRONLY
)) < 0)
2831 if ((fd
= open (procname
, O_RDWR
)) < 0)
2835 gdb_flush (gdb_stderr
);
2838 premptyset (&exitset
.sysset
);
2839 premptyset (&entryset
.sysset
);
2841 #ifdef PRFS_STOPEXEC
2842 /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2843 exits from exec system calls because of the user level loader. */
2847 if (ioctl (fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
2850 gdb_flush (gdb_stderr
);
2853 prfs_flags
|= PRFS_STOPEXEC
;
2854 if (ioctl (fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
2857 gdb_flush (gdb_stderr
);
2861 #else /* PRFS_STOPEXEC */
2863 Not all systems with /proc have all the exec* syscalls with the same
2864 names. On the SGI, for example, there is no SYS_exec, but there
2865 *is* a SYS_execv. So, we try to account for that. */
2868 praddset (&exitset
.sysset
, SYS_exec
);
2871 praddset (&exitset
.sysset
, SYS_execve
);
2874 praddset (&exitset
.sysset
, SYS_execv
);
2877 #ifdef PROCFS_USE_READ_WRITE
2878 exitset
.cmd
= PCSEXIT
;
2879 if (write (fd
, (char *) &exitset
, sizeof (struct sys_ctl
)) < 0)
2881 if (ioctl (fd
, PIOCSEXIT
, &exitset
.sysset
) < 0)
2885 gdb_flush (gdb_stderr
);
2888 #endif /* PRFS_STOPEXEC */
2890 praddset (&entryset
.sysset
, SYS_exit
);
2892 #ifdef PROCFS_USE_READ_WRITE
2893 entryset
.cmd
= PCSENTRY
;
2894 if (write (fd
, (char *) &entryset
, sizeof (struct sys_ctl
)) < 0)
2896 if (ioctl (fd
, PIOCSENTRY
, &entryset
.sysset
) < 0)
2900 gdb_flush (gdb_stderr
);
2904 /* Turn off inherit-on-fork flag so that all grand-children of gdb
2905 start with tracing flags cleared. */
2907 modify_inherit_on_fork_flag (fd
, 0);
2909 /* Turn on run-on-last-close flag so that this process will not hang
2910 if GDB goes away for some reason. */
2912 modify_run_on_last_close_flag (fd
, 1);
2914 #ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
2915 /* NOTE: revisit when doing thread support for UW */
2919 #ifdef PROCFS_USE_READ_WRITE
2920 struct proc_ctl pctl
;
2923 /* Solaris needs this to make procfs treat all threads seperately. Without
2924 this, all threads halt whenever something happens to any thread. Since
2925 GDB wants to control all this itself, it needs to set PR_ASYNC. */
2927 pr_flags
= PR_ASYNC
;
2928 #ifdef PROCFS_USE_READ_WRITE
2930 pctl
.data
= PR_FORK
| PR_ASYNC
;
2931 write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
));
2933 ioctl (fd
, PIOCSET
, &pr_flags
);
2936 #endif /* PR_ASYNC */
2937 #endif /* !UNIXWARE */
2944 proc_iterate_over_mappings -- call function for every mapped space
2948 int proc_iterate_over_mappings (int (*func)())
2952 Given a pointer to a function, call that function for every
2953 mapped address space, passing it an open file descriptor for
2954 the file corresponding to that mapped address space (if any)
2955 and the base address of the mapped space. Quit when we hit
2956 the end of the mappings or the function returns nonzero.
2961 proc_iterate_over_mappings (func
)
2962 int (*func
) PARAMS ((int, CORE_ADDR
));
2969 struct procinfo
*pi
;
2972 pi
= current_procinfo
;
2974 if (fstat (pi
->map_fd
, &sbuf
) < 0)
2977 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
2978 prmaps
= (prmap_t
*) alloca (nmap
* sizeof (prmap_t
));
2979 if ((lseek (pi
->map_fd
, 0, SEEK_SET
) == 0) &&
2980 (read (pi
->map_fd
, (char *) prmaps
, nmap
* sizeof (prmap_t
)) ==
2981 (nmap
* sizeof (prmap_t
))))
2984 for (prmap
= prmaps
; i
< nmap
&& funcstat
== 0; ++prmap
, ++i
)
2986 char name
[sizeof ("/proc/1234567890/object") +
2987 sizeof (prmap
->pr_mapname
)];
2988 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, prmap
->pr_mapname
);
2989 if ((fd
= open (name
, O_RDONLY
)) == -1)
2994 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
->pr_vaddr
);
3000 #else /* UNIXWARE */
3002 proc_iterate_over_mappings (func
)
3003 int (*func
) PARAMS ((int, CORE_ADDR
));
3008 struct prmap
*prmaps
;
3009 struct prmap
*prmap
;
3010 struct procinfo
*pi
;
3012 pi
= current_procinfo
;
3014 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
3016 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
3017 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
3019 for (prmap
= prmaps
; prmap
->pr_size
&& funcstat
== 0; ++prmap
)
3021 fd
= proc_address_to_fd (pi
, (CORE_ADDR
) prmap
->pr_vaddr
, 0);
3022 funcstat
= (*func
) (fd
, (CORE_ADDR
) prmap
->pr_vaddr
);
3029 #endif /* UNIXWARE */
3031 #if 0 /* Currently unused */
3036 proc_base_address -- find base address for segment containing address
3040 CORE_ADDR proc_base_address (CORE_ADDR addr)
3044 Given an address of a location in the inferior, find and return
3045 the base address of the mapped segment containing that address.
3047 This is used for example, by the shared library support code,
3048 where we have the pc value for some location in the shared library
3049 where we are stopped, and need to know the base address of the
3050 segment containing that address.
3054 proc_base_address (addr
)
3058 struct prmap
*prmaps
;
3059 struct prmap
*prmap
;
3060 CORE_ADDR baseaddr
= 0;
3061 struct procinfo
*pi
;
3063 pi
= current_procinfo
;
3065 if (ioctl (pi
->map_fd
, PIOCNMAP
, &nmap
) == 0)
3067 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
3068 if (ioctl (pi
->map_fd
, PIOCMAP
, prmaps
) == 0)
3070 for (prmap
= prmaps
; prmap
->pr_size
; ++prmap
)
3072 if ((prmap
->pr_vaddr
<= (caddr_t
) addr
) &&
3073 (prmap
->pr_vaddr
+ prmap
->pr_size
> (caddr_t
) addr
))
3075 baseaddr
= (CORE_ADDR
) prmap
->pr_vaddr
;
3091 proc_address_to_fd -- return open fd for file mapped to address
3095 int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
3099 Given an address in the current inferior's address space, use the
3100 /proc interface to find an open file descriptor for the file that
3101 this address was mapped in from. Return -1 if there is no current
3102 inferior. Print a warning message if there is an inferior but
3103 the address corresponds to no file (IE a bogus address).
3108 proc_address_to_fd (pi
, addr
, complain
)
3109 struct procinfo
*pi
;
3115 if ((fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, (caddr_t
*) & addr
)) < 0)
3119 print_sys_errmsg (pi
->pathname
, errno
);
3120 warning ("can't find mapped file for address 0x%x", addr
);
3125 #endif /* !UNIXWARE */
3127 /* Attach to process PID, then initialize for debugging it
3128 and wait for the trace-trap that results from attaching. */
3131 procfs_attach (args
, from_tty
)
3139 error_no_arg ("process-id to attach");
3143 if (pid
== getpid ()) /* Trying to masturbate? */
3144 error ("I refuse to debug myself!");
3148 exec_file
= (char *) get_exec_file (0);
3151 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
, target_pid_to_str (pid
));
3153 printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid
));
3155 gdb_flush (gdb_stdout
);
3158 inferior_pid
= pid
= do_attach (pid
);
3159 push_target (&procfs_ops
);
3163 /* Take a program previously attached to and detaches it.
3164 The program resumes execution and will no longer stop
3165 on signals, etc. We'd better not have left any breakpoints
3166 in the program or it'll die when it hits one. For this
3167 to work, it may be necessary for the process to have been
3168 previously attached. It *might* work if the program was
3169 started via the normal ptrace (PTRACE_TRACEME). */
3172 procfs_detach (args
, from_tty
)
3180 char *exec_file
= get_exec_file (0);
3183 printf_unfiltered ("Detaching from program: %s %s\n",
3184 exec_file
, target_pid_to_str (inferior_pid
));
3185 gdb_flush (gdb_stdout
);
3188 siggnal
= atoi (args
);
3190 do_detach (siggnal
);
3192 unpush_target (&procfs_ops
); /* Pop out of handling an inferior */
3195 /* Get ready to modify the registers array. On machines which store
3196 individual registers, this doesn't need to do anything. On machines
3197 which store all the registers in one fell swoop, this makes sure
3198 that registers contains all the registers from the program being
3202 procfs_prepare_to_store ()
3204 #ifdef CHILD_PREPARE_TO_STORE
3205 CHILD_PREPARE_TO_STORE ();
3209 /* Print status information about what we're accessing. */
3212 procfs_files_info (ignore
)
3213 struct target_ops
*ignore
;
3215 printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
3216 attach_flag
? "attached" : "child", target_pid_to_str (inferior_pid
));
3221 procfs_open (arg
, from_tty
)
3225 error ("Use the \"run\" command to start a Unix child process.");
3232 do_attach -- attach to an already existing process
3236 int do_attach (int pid)
3240 Attach to an already existing process with the specified process
3241 id. If the process is not already stopped, query whether to
3246 The option of stopping at attach time is specific to the /proc
3247 versions of gdb. Versions using ptrace force the attachee
3248 to stop. (I have changed this version to do so, too. All you
3249 have to do is "continue" to make it go on. -- gnu@cygnus.com)
3257 struct procinfo
*pi
;
3258 #ifdef PROCFS_USE_READ_WRITE
3259 struct flt_ctl fctl
;
3263 pi
= init_procinfo (pid
, 0);
3266 nlwp
= pi
->prstatus
.pr_nlwp
;
3267 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (id_t
));
3269 if (ioctl (pi
->ctl_fd
, PIOCLWPIDS
, lwps
))
3271 print_sys_errmsg (pi
->pathname
, errno
);
3272 error ("PIOCLWPIDS failed");
3274 #else /* PIOCLWPIDS */
3276 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
3279 for (; nlwp
> 0; nlwp
--, lwps
++)
3281 /* First one has already been created above. */
3282 if ((pi
= find_procinfo ((*lwps
<< 16) | pid
, 1)) == 0)
3283 pi
= init_procinfo ((*lwps
<< 16) | pid
, 0);
3285 if (THE_PR_LWP (pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3287 pi
->was_stopped
= 1;
3291 pi
->was_stopped
= 0;
3292 if (1 || query ("Process is currently running, stop it? "))
3294 #ifdef PROCFS_USE_READ_WRITE
3297 /* Make it run again when we close it. */
3298 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3299 #ifdef PROCFS_USE_READ_WRITE
3301 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3303 if (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) < 0)
3306 print_sys_errmsg (pi
->pathname
, errno
);
3307 close_proc_file (pi
);
3308 error ("PIOCSTOP failed");
3311 if (!procfs_read_status (pi
))
3313 print_sys_errmsg (pi
->pathname
, errno
);
3314 close_proc_file (pi
);
3315 error ("procfs_read_status failed");
3318 pi
->nopass_next_sigstop
= 1;
3322 printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
3323 target_pid_to_str (pi
->pid
));
3327 #ifdef PROCFS_USE_READ_WRITE
3328 fctl
.cmd
= PCSFAULT
;
3329 prfillset (&fctl
.fltset
);
3330 prdelset (&fctl
.fltset
, FLTPAGE
);
3332 if (write (pi
->ctl_fd
, (char *) &fctl
, sizeof (struct flt_ctl
)) < 0)
3333 print_sys_errmsg ("PCSFAULT failed", errno
);
3334 #else /* PROCFS_USE_READ_WRITE */
3335 prfillset (&pi
->prrun
.pr_fault
);
3336 prdelset (&pi
->prrun
.pr_fault
, FLTPAGE
);
3337 #ifdef PROCFS_DONT_TRACE_FAULTS
3338 premptyset (&pi
->prrun
.pr_fault
);
3340 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->prrun
.pr_fault
))
3342 print_sys_errmsg ("PIOCSFAULT failed", errno
);
3344 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->prrun
.pr_trace
))
3346 print_sys_errmsg ("PIOCSTRACE failed", errno
);
3348 add_thread (pi
->pid
);
3349 procfs_set_inferior_syscall_traps (pi
);
3350 #endif /* PROCFS_USE_READ_WRITE */
3360 do_detach -- detach from an attached-to process
3364 void do_detach (int signal)
3368 Detach from the current attachee.
3370 If signal is non-zero, the attachee is started running again and sent
3371 the specified signal.
3373 If signal is zero and the attachee was not already stopped when we
3374 attached to it, then we make it runnable again when we detach.
3376 Otherwise, we query whether or not to make the attachee runnable
3377 again, since we may simply want to leave it in the state it was in
3380 We report any problems, but do not consider them errors, since we
3381 MUST detach even if some things don't seem to go right. This may not
3382 be the ideal situation. (FIXME).
3389 struct procinfo
*pi
;
3391 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3395 set_proc_siginfo (pi
, signal
);
3397 #ifdef PROCFS_USE_READ_WRITE
3398 pi
->saved_exitset
.cmd
= PCSEXIT
;
3399 if (write (pi
->ctl_fd
, (char *) &pi
->saved_exitset
,
3400 sizeof (struct sys_ctl
)) < 0)
3402 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &pi
->saved_exitset
.sysset
) < 0)
3405 print_sys_errmsg (pi
->pathname
, errno
);
3406 printf_unfiltered ("PIOCSEXIT failed.\n");
3408 #ifdef PROCFS_USE_READ_WRITE
3409 pi
->saved_entryset
.cmd
= PCSENTRY
;
3410 if (write (pi
->ctl_fd
, (char *) &pi
->saved_entryset
,
3411 sizeof (struct sys_ctl
)) < 0)
3413 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &pi
->saved_entryset
.sysset
) < 0)
3416 print_sys_errmsg (pi
->pathname
, errno
);
3417 printf_unfiltered ("PIOCSENTRY failed.\n");
3419 #ifdef PROCFS_USE_READ_WRITE
3420 pi
->saved_trace
.cmd
= PCSTRACE
;
3421 if (write (pi
->ctl_fd
, (char *) &pi
->saved_trace
,
3422 sizeof (struct sig_ctl
)) < 0)
3424 if (ioctl (pi
->ctl_fd
, PIOCSTRACE
, &pi
->saved_trace
.sigset
) < 0)
3427 print_sys_errmsg (pi
->pathname
, errno
);
3428 printf_unfiltered ("PIOCSTRACE failed.\n");
3431 if (ioctl (pi
->ctl_fd
, PIOCSHOLD
, &pi
->saved_sighold
.sigset
) < 0)
3433 print_sys_errmsg (pi
->pathname
, errno
);
3434 printf_unfiltered ("PIOSCHOLD failed.\n");
3437 #ifdef PROCFS_USE_READ_WRITE
3438 pi
->saved_fltset
.cmd
= PCSFAULT
;
3439 if (write (pi
->ctl_fd
, (char *) &pi
->saved_fltset
,
3440 sizeof (struct flt_ctl
)) < 0)
3442 if (ioctl (pi
->ctl_fd
, PIOCSFAULT
, &pi
->saved_fltset
.fltset
) < 0)
3445 print_sys_errmsg (pi
->pathname
, errno
);
3446 printf_unfiltered ("PIOCSFAULT failed.\n");
3448 if (!procfs_read_status (pi
))
3450 print_sys_errmsg (pi
->pathname
, errno
);
3451 printf_unfiltered ("procfs_read_status failed.\n");
3456 || (THE_PR_LWP (pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3458 #ifdef PROCFS_USE_READ_WRITE
3462 if (signal
|| !pi
->was_stopped
||
3463 query ("Was stopped when attached, make it runnable again? "))
3465 /* Clear any pending signal if we want to detach without
3468 set_proc_siginfo (pi
, signal
);
3470 /* Clear any fault that might have stopped it. */
3471 #ifdef PROCFS_USE_READ_WRITE
3473 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3475 if (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0))
3478 print_sys_errmsg (pi
->pathname
, errno
);
3479 printf_unfiltered ("PIOCCFAULT failed.\n");
3482 /* Make it run again when we close it. */
3484 modify_run_on_last_close_flag (pi
->ctl_fd
, 1);
3488 close_proc_file (pi
);
3493 /* emulate wait() as much as possible.
3494 Wait for child to do something. Return pid of child, or -1 in case
3495 of error; store status in *OURSTATUS.
3497 Not sure why we can't
3498 just use wait(), but it seems to have problems when applied to a
3499 process being controlled with the /proc interface.
3501 We have a race problem here with no obvious solution. We need to let
3502 the inferior run until it stops on an event of interest, which means
3503 that we need to use the PIOCWSTOP ioctl. However, we cannot use this
3504 ioctl if the process is already stopped on something that is not an
3505 event of interest, or the call will hang indefinitely. Thus we first
3506 use PIOCSTATUS to see if the process is not stopped. If not, then we
3507 use PIOCWSTOP. But during the window between the two, if the process
3508 stops for any reason that is not an event of interest (such as a job
3509 control signal) then gdb will hang. One possible workaround is to set
3510 an alarm to wake up every minute of so and check to see if the process
3511 is still running, and if so, then reissue the PIOCWSTOP. But this is
3512 a real kludge, so has not been implemented. FIXME: investigate
3515 FIXME: Investigate why wait() seems to have problems with programs
3516 being control by /proc routines. */
3518 procfs_wait (pid
, ourstatus
)
3520 struct target_waitstatus
*ourstatus
;
3527 struct procinfo
*pi
;
3531 /* handle all syscall events first, otherwise we might not
3532 notice a thread was created until too late. */
3534 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3539 if (!(THE_PR_LWP (pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3542 why
= THE_PR_LWP (pi
->prstatus
).pr_why
;
3543 what
= THE_PR_LWP (pi
->prstatus
).pr_what
;
3544 if (why
== PR_SYSENTRY
|| why
== PR_SYSEXIT
)
3547 int found_handler
= 0;
3549 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
3550 if (pi
->syscall_handlers
[i
].syscall_num
== what
)
3553 pi
->saved_rtnval
= pi
->pid
;
3554 pi
->saved_statval
= 0;
3555 if (!pi
->syscall_handlers
[i
].func
3556 (pi
, what
, why
, &pi
->saved_rtnval
, &pi
->saved_statval
))
3563 if (why
== PR_SYSENTRY
)
3564 error ("PR_SYSENTRY, unhandled system call %d", what
);
3566 error ("PR_SYSEXIT, unhandled system call %d", what
);
3571 /* find a relevant process with an event */
3573 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
3574 if (pi
->had_event
&& (pid
== -1 || pi
->pid
== pid
))
3584 && !(THE_PR_LWP (pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
)))
3586 if (!procfs_write_pcwstop (pi
))
3593 if (errno
== ENOENT
)
3595 /* XXX Fixme -- what to do if attached? Can't call wait... */
3596 rtnval
= wait (&statval
);
3597 if ((rtnval
) != (PIDGET (inferior_pid
)))
3599 print_sys_errmsg (pi
->pathname
, errno
);
3600 error ("procfs_wait: wait failed, returned %d", rtnval
);
3606 print_sys_errmsg (pi
->pathname
, errno
);
3607 error ("PIOCSTATUS or PIOCWSTOP failed.");
3611 else if (THE_PR_LWP (pi
->prstatus
).pr_flags
& (PR_STOPPED
| PR_ISTOP
))
3614 rtnval
= pi
->prstatus
.pr_pid
;
3618 why
= THE_PR_LWP (pi
->prstatus
).pr_why
;
3619 what
= THE_PR_LWP (pi
->prstatus
).pr_what
;
3624 statval
= (what
<< 8) | 0177;
3628 rtnval
= pi
->saved_rtnval
;
3629 statval
= pi
->saved_statval
;
3632 statval
= (SIGSTOP
<< 8) | 0177;
3635 statval
= (what
<< 8) | 0177;
3642 statval
= (SIGTRAP
<< 8) | 0177;
3647 statval
= (SIGTRAP
<< 8) | 0177;
3650 #ifndef FAULTED_USE_SIGINFO
3651 /* Irix, contrary to the documentation, fills in 0 for si_signo.
3652 Solaris fills in si_signo. I'm not sure about others. */
3655 statval
= (SIGILL
<< 8) | 0177;
3659 statval
= (SIGTRAP
<< 8) | 0177;
3664 statval
= (SIGSEGV
<< 8) | 0177;
3669 statval
= (SIGFPE
<< 8) | 0177;
3671 case FLTPAGE
: /* Recoverable page fault */
3672 #endif /* not FAULTED_USE_SIGINFO */
3674 /* Use the signal which the kernel assigns. This is better than
3675 trying to second-guess it from the fault. In fact, I suspect
3676 that FLTACCESS can be either SIGSEGV or SIGBUS. */
3678 ((THE_PR_LWP (pi
->prstatus
).pr_info
.si_signo
) << 8) | 0177;
3683 error ("PIOCWSTOP, unknown why %d, what %d", why
, what
);
3685 /* Stop all the other threads when any of them stops. */
3688 struct procinfo
*procinfo
, *next_pi
;
3690 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3692 next_pi
= procinfo
->next
;
3693 if (!procinfo
->had_event
)
3695 #ifdef PROCFS_USE_READ_WRITE
3697 if (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (long)) < 0)
3699 print_sys_errmsg (procinfo
->pathname
, errno
);
3700 error ("PCSTOP failed");
3703 /* A bug in Solaris (2.5) causes us to hang when trying to
3704 stop a stopped process. So, we have to check first in
3705 order to avoid the hang. */
3706 if (!procfs_read_status (procinfo
))
3708 /* The LWP has apparently terminated. */
3710 printf_filtered ("LWP %d doesn't respond.\n",
3711 (procinfo
->pid
>> 16) & 0xffff);
3712 close_proc_file (procinfo
);
3716 if (!(procinfo
->prstatus
.pr_flags
& PR_STOPPED
))
3717 if (ioctl (procinfo
->ctl_fd
, PIOCSTOP
, &procinfo
->prstatus
)
3720 print_sys_errmsg (procinfo
->pathname
, errno
);
3721 warning ("PIOCSTOP failed");
3730 error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
3731 THE_PR_LWP (pi
->prstatus
).pr_flags
);
3734 store_waitstatus (ourstatus
, statval
);
3736 if (rtnval
== -1) /* No more children to wait for */
3738 warning ("Child process unexpectedly missing");
3739 /* Claim it exited with unknown signal. */
3740 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3741 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
3745 pi
->had_event
= 0; /* Indicate that we've seen this one */
3753 set_proc_siginfo - set a process's current signal info
3757 void set_proc_siginfo (struct procinfo *pip, int signo);
3761 Given a pointer to a process info struct in PIP and a signal number
3762 in SIGNO, set the process's current signal and its associated signal
3763 information. The signal will be delivered to the process immediately
3764 after execution is resumed, even if it is being held. In addition,
3765 this particular delivery will not cause another PR_SIGNALLED stop
3766 even if the signal is being traced.
3768 If we are not delivering the same signal that the prstatus siginfo
3769 struct contains information about, then synthesize a siginfo struct
3770 to match the signal we are going to deliver, make it of the type
3771 "generated by a user process", and send this synthesized copy. When
3772 used to set the inferior's signal state, this will be required if we
3773 are not currently stopped because of a traced signal, or if we decide
3774 to continue with a different signal.
3776 Note that when continuing the inferior from a stop due to receipt
3777 of a traced signal, we either have set PRCSIG to clear the existing
3778 signal, or we have to call this function to do a PIOCSSIG with either
3779 the existing siginfo struct from pr_info, or one we have synthesized
3780 appropriately for the signal we want to deliver. Otherwise if the
3781 signal is still being traced, the inferior will immediately stop
3784 See siginfo(5) for more details.
3788 set_proc_siginfo (pip
, signo
)
3789 struct procinfo
*pip
;
3792 struct siginfo newsiginfo
;
3793 struct siginfo
*sip
;
3794 #if defined (UNIXWARE) || defined (PROCFS_USE_READ_WRITE)
3795 struct sigi_ctl sictl
;
3798 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
3799 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
3800 receives a PIOCSSIG with a signal identical to the current signal,
3801 it messes up the current signal. Work around the kernel bug. */
3802 if (signo
== THE_PR_LWP (pip
->prstatus
).pr_cursig
)
3807 if (signo
== THE_PR_LWP (pip
->prstatus
).pr_info
.si_signo
)
3809 memcpy ((char *) &sictl
.siginfo
, (char *) &pip
->prstatus
.pr_lwp
.pr_info
,
3810 sizeof (siginfo_t
));
3813 if (signo
== THE_PR_LWP (pip
->prstatus
).pr_info
.si_signo
)
3815 sip
= &pip
->prstatus
.pr_info
;
3821 siginfo_t
*sip
= &sictl
.siginfo
;
3822 memset ((char *) sip
, 0, sizeof (siginfo_t
));
3824 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
3827 sip
->si_signo
= signo
;
3830 sip
->si_pid
= getpid ();
3831 sip
->si_uid
= getuid ();
3833 #ifdef PROCFS_USE_READ_WRITE
3835 if (write (pip
->ctl_fd
, (char *) &sictl
, sizeof (struct sigi_ctl
)) < 0)
3837 if (ioctl (pip
->ctl_fd
, PIOCSSIG
, sip
) < 0)
3840 print_sys_errmsg (pip
->pathname
, errno
);
3841 warning ("PIOCSSIG failed");
3845 /* Resume execution of process PID. If STEP is nozero, then
3846 just single step it. If SIGNAL is nonzero, restart it with that
3847 signal activated. */
3850 procfs_resume (pid
, step
, signo
)
3853 enum target_signal signo
;
3856 struct procinfo
*pi
, *procinfo
, *next_pi
;
3857 #if defined (UNIXWARE) || defined (PROCFS_USE_READ_WRITE)
3858 struct proc_ctl pctl
;
3861 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
3866 pctl
.data
= PRCFAULT
;
3868 pi
->prrun
.pr_flags
= PRSTRACE
| PRSFAULT
| PRCFAULT
;
3872 /* It should not be necessary. If the user explicitly changes the value,
3873 value_assign calls write_register_bytes, which writes it. */
3874 /* It may not be absolutely necessary to specify the PC value for
3875 restarting, but to be safe we use the value that gdb considers
3876 to be current. One case where this might be necessary is if the
3877 user explicitly changes the PC value that gdb considers to be
3878 current. FIXME: Investigate if this is necessary or not. */
3880 #ifdef PRSVADDR_BROKEN
3881 /* Can't do this under Solaris running on a Sparc, as there seems to be no
3882 place to put nPC. In fact, if you use this, nPC seems to be set to some
3883 random garbage. We have to rely on the fact that PC and nPC have been
3884 written previously via PIOCSREG during a register flush. */
3886 pi
->prrun
.pr_vaddr
= (caddr_t
) * (int *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
3887 pi
->prrun
.pr_flags
!= PRSVADDR
;
3891 if (signo
== TARGET_SIGNAL_STOP
&& pi
->nopass_next_sigstop
)
3892 /* When attaching to a child process, if we forced it to stop with
3893 a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
3894 Upon resuming the first time after such a stop, we explicitly
3895 inhibit sending it another SIGSTOP, which would be the normal
3896 result of default signal handling. One potential drawback to
3897 this is that we will also ignore any attempt to by the user
3898 to explicitly continue after the attach with a SIGSTOP. Ultimately
3899 this problem should be dealt with by making the routines that
3900 deal with the inferior a little smarter, and possibly even allow
3901 an inferior to continue running at the same time as gdb. (FIXME?) */
3903 else if (signo
== TARGET_SIGNAL_TSTP
3904 && THE_PR_LWP (pi
->prstatus
).pr_cursig
== SIGTSTP
3905 && THE_PR_LWP (pi
->prstatus
).pr_action
.sa_handler
== SIG_DFL
3908 /* We are about to pass the inferior a SIGTSTP whose action is
3909 SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
3910 (notifying the parent via wait()), and then keep going from the
3911 same place when the parent is ready for you to keep going. So
3912 under the debugger, it should do nothing (as if the program had
3913 been stopped and then later resumed. Under ptrace, this
3914 happens for us, but under /proc, the system obligingly stops
3915 the process, and wait_for_inferior would have no way of
3916 distinguishing that type of stop (which indicates that we
3917 should just start it again), with a stop due to the pr_trace
3918 field of the prrun_t struct.
3920 Note that if the SIGTSTP is being caught, we *do* need to pass it,
3921 because the handler needs to get executed. */
3924 signal_to_pass
= target_signal_to_host (signo
);
3928 set_proc_siginfo (pi
, signal_to_pass
);
3933 pctl
.data
|= PRCSIG
;
3935 pi
->prrun
.pr_flags
|= PRCSIG
;
3938 pi
->nopass_next_sigstop
= 0;
3942 pctl
.data
|= PRSTEP
;
3944 pi
->prrun
.pr_flags
|= PRSTEP
;
3948 /* Don't try to start a process unless it's stopped on an
3949 `event of interest'. Doing so will cause errors. */
3951 if (!procfs_read_status (pi
))
3953 /* The LWP has apparently terminated. */
3955 printf_filtered ("LWP %d doesn't respond.\n",
3956 (pi
->pid
>> 16) & 0xffff);
3957 close_proc_file (pi
);
3961 #ifdef PROCFS_USE_READ_WRITE
3962 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
3964 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
3965 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
3968 /* The LWP has apparently terminated. */
3970 printf_filtered ("LWP %d doesn't respond.\n",
3971 (pi
->pid
>> 16) & 0xffff);
3972 close_proc_file (pi
);
3976 /* Continue all the other threads that haven't had an event of interest.
3977 Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
3978 set by do_attach, and means this is the first resume after an attach.
3979 All threads were CSTOP'd by do_attach, and should be resumed now. */
3982 for (procinfo
= procinfo_list
; procinfo
; procinfo
= next_pi
)
3984 next_pi
= procinfo
->next
;
3986 if (!procinfo
->had_event
||
3987 (procinfo
->nopass_next_sigstop
&& signo
== TARGET_SIGNAL_STOP
))
3989 procinfo
->had_event
= procinfo
->nopass_next_sigstop
= 0;
3990 #ifdef PROCFS_USE_READ_WRITE
3991 pctl
.data
= PRCFAULT
| PRCSIG
;
3992 if (write (procinfo
->ctl_fd
, (char *) &pctl
,
3993 sizeof (struct proc_ctl
)) < 0)
3995 if (!procfs_read_status (procinfo
))
3996 fprintf_unfiltered (gdb_stderr
,
3997 "procfs_read_status failed, errno=%d\n",
3999 print_sys_errmsg (procinfo
->pathname
, errno
);
4000 error ("PCRUN failed");
4003 procinfo
->prrun
.pr_flags
&= PRSTEP
;
4004 procinfo
->prrun
.pr_flags
|= PRCFAULT
| PRCSIG
;
4005 if (!procfs_read_status (procinfo
))
4007 /* The LWP has apparently terminated. */
4009 printf_filtered ("LWP %d doesn't respond.\n",
4010 (procinfo
->pid
>> 16) & 0xffff);
4011 close_proc_file (procinfo
);
4015 /* Don't try to start a process unless it's stopped on an
4016 `event of interest'. Doing so will cause errors. */
4018 if ((procinfo
->prstatus
.pr_flags
& PR_ISTOP
)
4019 && ioctl (procinfo
->ctl_fd
, PIOCRUN
, &procinfo
->prrun
) < 0)
4021 if (!procfs_read_status (procinfo
))
4022 fprintf_unfiltered (gdb_stderr
,
4023 "procfs_read_status failed, errno=%d\n",
4025 print_sys_errmsg (procinfo
->pathname
, errno
);
4026 warning ("PIOCRUN failed");
4030 procfs_read_status (procinfo
);
4038 procfs_fetch_registers -- fetch current registers from inferior
4042 void procfs_fetch_registers (int regno)
4046 Read the current values of the inferior's registers, both the
4047 general register set and floating point registers (if supported)
4048 and update gdb's idea of their current values.
4053 procfs_fetch_registers (regno
)
4056 struct procinfo
*pi
;
4058 pi
= current_procinfo
;
4061 if (procfs_read_status (pi
))
4063 supply_gregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
4064 #if defined (FP0_REGNUM)
4065 supply_fpregset (&pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
);
4068 #else /* UNIXWARE */
4069 if (ioctl (pi
->ctl_fd
, PIOCGREG
, &pi
->gregset
.gregset
) != -1)
4071 supply_gregset (&pi
->gregset
.gregset
);
4073 #if defined (FP0_REGNUM)
4074 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
.fpregset
) != -1)
4076 supply_fpregset (&pi
->fpregset
.fpregset
);
4079 #endif /* UNIXWARE */
4086 proc_init_failed - called when /proc access initialization fails
4091 static void proc_init_failed (struct procinfo *pi,
4092 char *why, int kill_p)
4096 This function is called whenever initialization of access to a /proc
4097 entry fails. It prints a suitable error message, does some cleanup,
4098 and then invokes the standard error processing routine which dumps
4099 us back into the command loop. If KILL_P is true, sends SIGKILL.
4103 proc_init_failed (pi
, why
, kill_p
)
4104 struct procinfo
*pi
;
4108 print_sys_errmsg (pi
->pathname
, errno
);
4110 kill (pi
->pid
, SIGKILL
);
4111 close_proc_file (pi
);
4120 close_proc_file - close any currently open /proc entry
4124 static void close_proc_file (struct procinfo *pip)
4128 Close any currently open /proc entry and mark the process information
4129 entry as invalid. In order to ensure that we don't try to reuse any
4130 stale information, the pid, fd, and pathnames are explicitly
4131 invalidated, which may be overkill.
4136 close_proc_file (pip
)
4137 struct procinfo
*pip
;
4139 struct procinfo
*procinfo
;
4141 delete_thread (pip
->pid
); /* remove thread from GDB's thread list */
4142 remove_fd (pip
); /* Remove fd from poll/select list */
4144 close (pip
->ctl_fd
);
4145 #ifdef HAVE_MULTIPLE_PROC_FDS
4147 close (pip
->status_fd
);
4148 close (pip
->map_fd
);
4151 free (pip
->pathname
);
4153 /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
4155 if (procinfo_list
== pip
)
4156 procinfo_list
= pip
->next
;
4159 for (procinfo
= procinfo_list
; procinfo
; procinfo
= procinfo
->next
)
4161 if (procinfo
->next
== pip
)
4163 procinfo
->next
= pip
->next
;
4172 close_proc_file_cleanup (pip
)
4175 close_proc_file ((struct procinfo
*) pip
);
4178 static struct cleanup
*
4179 make_cleanup_close_proc_file (pip
)
4180 struct procinfo
*pip
;
4182 return make_cleanup (close_proc_file_cleanup
, pip
);
4189 open_proc_file - open a /proc entry for a given process id
4193 static int open_proc_file (int pid, struct procinfo *pip, int mode)
4197 Given a process id and a mode, close the existing open /proc
4198 entry (if any) and open one for the new process id, in the
4199 specified mode. Once it is open, then mark the local process
4200 information structure as valid, which guarantees that the pid,
4201 fd, and pathname fields match an open /proc entry. Returns
4202 zero if the open fails, nonzero otherwise.
4204 Note that the pathname is left intact, even when the open fails,
4205 so that callers can use it to construct meaningful error messages
4206 rather than just "file open failed".
4208 Note that for Solaris, the process-id also includes an LWP-id, so we
4209 actually attempt to open that. If we are handed a pid with a 0 LWP-id,
4210 then we will ask the kernel what it is and add it to the pid. Hence,
4211 the pid can be changed by us.
4215 open_proc_file (pid
, pip
, mode
, control
)
4217 struct procinfo
*pip
;
4225 pip
->pathname
= xmalloc (MAX_PROC_NAME_SIZE
);
4234 #ifdef HAVE_MULTIPLE_PROC_FDS
4235 sprintf (pip
->pathname
, STATUS_PROC_NAME_FMT
, tmp
);
4236 if ((pip
->status_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4241 sprintf (pip
->pathname
, AS_PROC_NAME_FMT
, tmp
);
4242 if ((pip
->as_fd
= open (pip
->pathname
, O_RDWR
)) < 0)
4244 close (pip
->status_fd
);
4248 sprintf (pip
->pathname
, MAP_PROC_NAME_FMT
, tmp
);
4249 if ((pip
->map_fd
= open (pip
->pathname
, O_RDONLY
)) < 0)
4251 close (pip
->status_fd
);
4258 sprintf (pip
->pathname
, CTL_PROC_NAME_FMT
, tmp
);
4259 if ((pip
->ctl_fd
= open (pip
->pathname
, O_WRONLY
)) < 0)
4261 close (pip
->status_fd
);
4263 close (pip
->map_fd
);
4268 #else /* HAVE_MULTIPLE_PROC_FDS */
4269 sprintf (pip
->pathname
, CTL_PROC_NAME_FMT
, tmp
);
4271 if ((tmpfd
= open (pip
->pathname
, mode
)) < 0)
4275 pip
->ctl_fd
= tmpfd
;
4277 pip
->map_fd
= tmpfd
;
4278 pip
->status_fd
= tmpfd
;
4280 tmp
= (pid
>> 16) & 0xffff; /* Extract thread id */
4283 { /* Don't know thread id yet */
4284 if (ioctl (tmpfd
, PIOCSTATUS
, &pip
->prstatus
) < 0)
4286 print_sys_errmsg (pip
->pathname
, errno
);
4288 error ("open_proc_file: PIOCSTATUS failed");
4291 tmp
= pip
->prstatus
.pr_who
; /* Get thread id from prstatus_t */
4292 pip
->pid
= (tmp
<< 16) | pid
; /* Update pip */
4295 if ((pip
->ctl_fd
= ioctl (tmpfd
, PIOCOPENLWP
, &tmp
)) < 0)
4301 #ifdef PIOCSET /* New method */
4304 pr_flags
= PR_ASYNC
;
4305 ioctl (pip
->ctl_fd
, PIOCSET
, &pr_flags
);
4309 /* keep extra fds in sync */
4310 pip
->as_fd
= pip
->ctl_fd
;
4311 pip
->map_fd
= pip
->ctl_fd
;
4312 pip
->status_fd
= pip
->ctl_fd
;
4314 close (tmpfd
); /* All done with main pid */
4315 #endif /* PIOCOPENLWP */
4317 #endif /* HAVE_MULTIPLE_PROC_FDS */
4323 mappingflags (flags
)
4326 static char asciiflags
[8];
4328 strcpy (asciiflags
, "-------");
4329 #if defined (MA_PHYS)
4330 if (flags
& MA_PHYS
)
4331 asciiflags
[0] = 'd';
4333 if (flags
& MA_STACK
)
4334 asciiflags
[1] = 's';
4335 if (flags
& MA_BREAK
)
4336 asciiflags
[2] = 'b';
4337 if (flags
& MA_SHARED
)
4338 asciiflags
[3] = 's';
4339 if (flags
& MA_READ
)
4340 asciiflags
[4] = 'r';
4341 if (flags
& MA_WRITE
)
4342 asciiflags
[5] = 'w';
4343 if (flags
& MA_EXEC
)
4344 asciiflags
[6] = 'x';
4345 return (asciiflags
);
4349 info_proc_flags (pip
, summary
)
4350 struct procinfo
*pip
;
4353 struct trans
*transp
;
4355 long flags
= pip
->prstatus
.pr_flags
| pip
->prstatus
.pr_lwp
.pr_flags
;
4357 long flags
= pip
->prstatus
.pr_flags
;
4360 printf_filtered ("%-32s", "Process status flags:");
4363 printf_filtered ("\n\n");
4365 for (transp
= pr_flag_table
; transp
->name
!= NULL
; transp
++)
4367 if (flags
& transp
->value
)
4371 printf_filtered ("%s ", transp
->name
);
4375 printf_filtered ("\t%-16s %s.\n", transp
->name
, transp
->desc
);
4379 printf_filtered ("\n");
4383 info_proc_stop (pip
, summary
)
4384 struct procinfo
*pip
;
4387 struct trans
*transp
;
4391 why
= THE_PR_LWP (pip
->prstatus
).pr_why
;
4392 what
= THE_PR_LWP (pip
->prstatus
).pr_what
;
4394 if (THE_PR_LWP (pip
->prstatus
).pr_flags
& PR_STOPPED
)
4396 printf_filtered ("%-32s", "Reason for stopping:");
4399 printf_filtered ("\n\n");
4401 for (transp
= pr_why_table
; transp
->name
!= NULL
; transp
++)
4403 if (why
== transp
->value
)
4407 printf_filtered ("%s ", transp
->name
);
4411 printf_filtered ("\t%-16s %s.\n",
4412 transp
->name
, transp
->desc
);
4418 /* Use the pr_why field to determine what the pr_what field means, and
4419 print more information. */
4424 /* pr_what is unused for this case */
4430 printf_filtered ("%s ", signalname (what
));
4434 printf_filtered ("\t%-16s %s.\n", signalname (what
),
4435 safe_strsignal (what
));
4441 printf_filtered ("%s ", syscallname (what
));
4445 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4446 "Entered this system call");
4452 printf_filtered ("%s ", syscallname (what
));
4456 printf_filtered ("\t%-16s %s.\n", syscallname (what
),
4457 "Returned from this system call");
4463 printf_filtered ("%s ",
4464 lookupname (faults_table
, what
, "fault"));
4468 printf_filtered ("\t%-16s %s.\n",
4469 lookupname (faults_table
, what
, "fault"),
4470 lookupdesc (faults_table
, what
));
4474 printf_filtered ("\n");
4479 info_proc_siginfo (pip
, summary
)
4480 struct procinfo
*pip
;
4483 struct siginfo
*sip
;
4485 if ((THE_PR_LWP (pip
->prstatus
).pr_flags
& PR_STOPPED
) &&
4486 (THE_PR_LWP (pip
->prstatus
).pr_why
== PR_SIGNALLED
||
4487 THE_PR_LWP (pip
->prstatus
).pr_why
== PR_FAULTED
))
4489 printf_filtered ("%-32s", "Additional signal/fault info:");
4490 sip
= &(THE_PR_LWP (pip
->prstatus
).pr_info
);
4493 printf_filtered ("%s ", signalname (sip
->si_signo
));
4494 if (sip
->si_errno
> 0)
4496 printf_filtered ("%s ", errnoname (sip
->si_errno
));
4498 if (sip
->si_code
<= 0)
4500 printf_filtered ("sent by %s, uid %d ",
4501 target_pid_to_str (sip
->si_pid
),
4506 printf_filtered ("%s ", sigcodename (sip
));
4507 if ((sip
->si_signo
== SIGILL
) ||
4508 (sip
->si_signo
== SIGFPE
) ||
4509 (sip
->si_signo
== SIGSEGV
) ||
4510 (sip
->si_signo
== SIGBUS
))
4512 printf_filtered ("addr=%#lx ",
4513 (unsigned long) sip
->si_addr
);
4515 else if ((sip
->si_signo
== SIGCHLD
))
4517 printf_filtered ("child %s, status %u ",
4518 target_pid_to_str (sip
->si_pid
),
4521 else if ((sip
->si_signo
== SIGPOLL
))
4523 printf_filtered ("band %u ", sip
->si_band
);
4529 printf_filtered ("\n\n");
4530 printf_filtered ("\t%-16s %s.\n", signalname (sip
->si_signo
),
4531 safe_strsignal (sip
->si_signo
));
4532 if (sip
->si_errno
> 0)
4534 printf_filtered ("\t%-16s %s.\n",
4535 errnoname (sip
->si_errno
),
4536 safe_strerror (sip
->si_errno
));
4538 if (sip
->si_code
<= 0)
4540 printf_filtered ("\t%-16u %s\n", sip
->si_pid
, /* XXX need target_pid_to_str() */
4541 "PID of process sending signal");
4542 printf_filtered ("\t%-16u %s\n", sip
->si_uid
,
4543 "UID of process sending signal");
4547 printf_filtered ("\t%-16s %s.\n", sigcodename (sip
),
4549 if ((sip
->si_signo
== SIGILL
) ||
4550 (sip
->si_signo
== SIGFPE
))
4552 printf_filtered ("\t%#-16lx %s.\n",
4553 (unsigned long) sip
->si_addr
,
4554 "Address of faulting instruction");
4556 else if ((sip
->si_signo
== SIGSEGV
) ||
4557 (sip
->si_signo
== SIGBUS
))
4559 printf_filtered ("\t%#-16lx %s.\n",
4560 (unsigned long) sip
->si_addr
,
4561 "Address of faulting memory reference");
4563 else if ((sip
->si_signo
== SIGCHLD
))
4565 printf_filtered ("\t%-16u %s.\n", sip
->si_pid
, /* XXX need target_pid_to_str() */
4566 "Child process ID");
4567 printf_filtered ("\t%-16u %s.\n", sip
->si_status
,
4568 "Child process exit value or signal");
4570 else if ((sip
->si_signo
== SIGPOLL
))
4572 printf_filtered ("\t%-16u %s.\n", sip
->si_band
,
4573 "Band event for POLL_{IN,OUT,MSG}");
4577 printf_filtered ("\n");
4582 info_proc_syscalls (pip
, summary
)
4583 struct procinfo
*pip
;
4591 #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
4592 if (pip
->prstatus
.pr_flags
& PR_ASLEEP
)
4594 int syscallnum
= pip
->prstatus
.pr_reg
[R_D0
];
4597 printf_filtered ("%-32s", "Sleeping in system call:");
4598 printf_filtered ("%s", syscallname (syscallnum
));
4602 printf_filtered ("Sleeping in system call '%s'.\n",
4603 syscallname (syscallnum
));
4609 if (ioctl (pip
->ctl_fd
, PIOCGENTRY
, &pip
->entryset
) < 0)
4611 print_sys_errmsg (pip
->pathname
, errno
);
4612 error ("PIOCGENTRY failed");
4615 if (ioctl (pip
->ctl_fd
, PIOCGEXIT
, &pip
->exitset
) < 0)
4617 print_sys_errmsg (pip
->pathname
, errno
);
4618 error ("PIOCGEXIT failed");
4622 printf_filtered ("System call tracing information:\n\n");
4624 printf_filtered ("\t%-12s %-8s %-8s\n",
4628 for (syscallnum
= 0; syscallnum
< MAX_SYSCALLS
; syscallnum
++)
4631 if (syscall_table
[syscallnum
] != NULL
)
4632 printf_filtered ("\t%-12s ", syscall_table
[syscallnum
]);
4634 printf_filtered ("\t%-12d ", syscallnum
);
4637 printf_filtered ("%-8s ",
4638 prismember (&pip
->prstatus
.pr_sysentry
, syscallnum
)
4640 printf_filtered ("%-8s ",
4641 prismember (&pip
->prstatus
.pr_sysexit
, syscallnum
)
4644 printf_filtered ("%-8s ",
4645 prismember (&pip
->entryset
, syscallnum
)
4647 printf_filtered ("%-8s ",
4648 prismember (&pip
->exitset
, syscallnum
)
4651 printf_filtered ("\n");
4653 printf_filtered ("\n");
4662 static char locbuf
[32];
4664 name
= strsigno (signo
);
4667 sprintf (locbuf
, "Signal %d", signo
);
4671 sprintf (locbuf
, "%s (%d)", name
, signo
);
4681 static char locbuf
[32];
4683 name
= strerrno (errnum
);
4686 sprintf (locbuf
, "Errno %d", errnum
);
4690 sprintf (locbuf
, "%s (%d)", name
, errnum
);
4696 info_proc_signals (pip
, summary
)
4697 struct procinfo
*pip
;
4704 #ifndef PROCFS_USE_READ_WRITE
4705 if (ioctl (pip
->ctl_fd
, PIOCGTRACE
, &pip
->trace
) < 0)
4707 print_sys_errmsg (pip
->pathname
, errno
);
4708 error ("PIOCGTRACE failed");
4712 printf_filtered ("Disposition of signals:\n\n");
4713 printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
4714 "Signal", "Trace", "Hold", "Pending", "Description");
4715 for (signo
= 0; signo
< NSIG
; signo
++)
4718 printf_filtered ("\t%-15s ", signalname (signo
));
4720 printf_filtered ("%-8s ",
4721 prismember (&pip
->prstatus
.pr_sigtrace
, signo
)
4723 printf_filtered ("%-8s ",
4724 prismember (&pip
->prstatus
.pr_lwp
.pr_context
.uc_sigmask
, signo
)
4727 printf_filtered ("%-8s ",
4728 prismember (&pip
->trace
, signo
)
4730 printf_filtered ("%-8s ",
4731 prismember (&pip
->prstatus
.pr_sighold
, signo
)
4736 if (prismember (&pip
->prstatus
.pr_sigpend
, signo
) ||
4737 prismember (&pip
->prstatus
.pr_lwp
.pr_lwppend
, signo
))
4738 printf_filtered ("%-8s ", "yes");
4740 printf_filtered ("%-8s ", "no");
4741 #else /* UNIXWARE */
4742 #ifdef PROCFS_SIGPEND_OFFSET
4743 /* Alpha OSF/1 numbers the pending signals from 1. */
4744 printf_filtered ("%-8s ",
4745 (signo
? prismember (&pip
->prstatus
.pr_sigpend
,
4750 printf_filtered ("%-8s ",
4751 prismember (&pip
->prstatus
.pr_sigpend
, signo
)
4754 #endif /* UNIXWARE */
4755 printf_filtered (" %s\n", safe_strsignal (signo
));
4757 printf_filtered ("\n");
4762 info_proc_faults (pip
, summary
)
4763 struct procinfo
*pip
;
4766 struct trans
*transp
;
4771 if (ioctl (pip
->ctl_fd
, PIOCGFAULT
, &pip
->fltset
.fltset
) < 0)
4773 print_sys_errmsg (pip
->pathname
, errno
);
4774 error ("PIOCGFAULT failed");
4778 printf_filtered ("Current traced hardware fault set:\n\n");
4779 printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
4781 for (transp
= faults_table
; transp
->name
!= NULL
; transp
++)
4784 printf_filtered ("\t%-12s ", transp
->name
);
4786 printf_filtered ("%-8s", prismember (&pip
->prstatus
.pr_flttrace
, transp
->value
)
4789 printf_filtered ("%-8s", prismember (&pip
->fltset
.fltset
, transp
->value
)
4792 printf_filtered ("\n");
4794 printf_filtered ("\n");
4799 info_proc_mappings (pip
, summary
)
4800 struct procinfo
*pip
;
4804 struct prmap
*prmaps
;
4805 struct prmap
*prmap
;
4806 #ifdef PROCFS_USE_READ_WRITE
4812 printf_filtered ("Mapped address spaces:\n\n");
4813 #ifdef BFD_HOST_64_BIT
4814 printf_filtered (" %18s %18s %10s %10s %7s\n",
4816 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
4823 #ifdef PROCFS_USE_READ_WRITE
4824 if (fstat (pip
->map_fd
, &sbuf
) == 0)
4826 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
4827 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4828 if ((lseek (pip
->map_fd
, 0, SEEK_SET
) == 0) &&
4829 (read (pip
->map_fd
, (char *) prmaps
,
4830 nmap
* sizeof (*prmaps
)) == (nmap
* sizeof (*prmaps
))))
4833 for (prmap
= prmaps
; i
< nmap
; ++prmap
, ++i
)
4835 if (ioctl (pip
->ctl_fd
, PIOCNMAP
, &nmap
) == 0)
4837 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4838 if (ioctl (pip
->ctl_fd
, PIOCMAP
, prmaps
) == 0)
4840 for (prmap
= prmaps
; prmap
->pr_size
; ++prmap
)
4841 #endif /* PROCFS_USE_READ_WRITE */
4843 #ifdef BFD_HOST_64_BIT
4844 printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
4846 printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
4848 (unsigned long) prmap
->pr_vaddr
,
4849 (unsigned long) prmap
->pr_vaddr
4850 + prmap
->pr_size
- 1,
4853 mappingflags (prmap
->pr_mflags
));
4857 printf_filtered ("\n");
4865 info_proc -- implement the "info proc" command
4869 void info_proc (char *args, int from_tty)
4873 Implement gdb's "info proc" command by using the /proc interface
4874 to print status information about any currently running process.
4876 Examples of the use of "info proc" are:
4878 info proc (prints summary info for current inferior)
4879 info proc 123 (prints summary info for process with pid 123)
4880 info proc mappings (prints address mappings)
4881 info proc times (prints process/children times)
4882 info proc id (prints pid, ppid, gid, sid, etc)
4883 FIXME: i proc id not implemented.
4884 info proc status (prints general process state info)
4885 FIXME: i proc status not implemented.
4886 info proc signals (prints info about signal handling)
4887 info proc all (prints all info)
4892 info_proc (args
, from_tty
)
4897 struct procinfo
*pip
;
4898 struct cleanup
*old_chain
;
4914 old_chain
= make_cleanup (null_cleanup
, 0);
4916 /* Default to using the current inferior if no pid specified. Note
4917 that inferior_pid may be 0, hence we set okerr. */
4919 pid
= inferior_pid
& 0x7fffffff; /* strip off sol-thread bit */
4920 if (!(pip
= find_procinfo (pid
, 1))) /* inferior_pid no good? */
4921 pip
= procinfo_list
; /* take first available */
4922 pid
= pid
& 0xffff; /* extract "real" pid */
4926 if ((argv
= buildargv (args
)) == NULL
)
4930 make_cleanup_freeargv (argv
);
4932 while (*argv
!= NULL
)
4934 argsize
= strlen (*argv
);
4935 if (argsize
>= 1 && strncmp (*argv
, "all", argsize
) == 0)
4940 else if (argsize
>= 2 && strncmp (*argv
, "faults", argsize
) == 0)
4945 else if (argsize
>= 2 && strncmp (*argv
, "flags", argsize
) == 0)
4950 else if (argsize
>= 1 && strncmp (*argv
, "id", argsize
) == 0)
4955 else if (argsize
>= 1 && strncmp (*argv
, "mappings", argsize
) == 0)
4960 else if (argsize
>= 2 && strncmp (*argv
, "signals", argsize
) == 0)
4965 else if (argsize
>= 2 && strncmp (*argv
, "status", argsize
) == 0)
4970 else if (argsize
>= 2 && strncmp (*argv
, "syscalls", argsize
) == 0)
4975 else if (argsize
>= 1 && strncmp (*argv
, "times", argsize
) == 0)
4980 else if ((pid
= atoi (*argv
)) > 0)
4982 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
4983 memset (pip
, 0, sizeof (*pip
));
4986 if (!open_proc_file (pid
, pip
, O_RDONLY
, 0))
4988 perror_with_name (pip
->pathname
);
4992 make_cleanup_close_proc_file (pip
);
4994 else if (**argv
!= '\000')
4996 error ("Unrecognized or ambiguous keyword `%s'.", *argv
);
5002 /* If we don't have a valid open process at this point, then we have no
5003 inferior or didn't specify a specific pid. */
5008 No process. Start debugging a program or specify an explicit process ID.");
5011 if (!procfs_read_status (pip
))
5013 print_sys_errmsg (pip
->pathname
, errno
);
5014 error ("procfs_read_status failed");
5017 #ifndef PROCFS_USE_READ_WRITE
5019 nlwp
= pip
->prstatus
.pr_nlwp
;
5020 lwps
= alloca ((2 * nlwp
+ 2) * sizeof (*lwps
));
5022 if (ioctl (pip
->ctl_fd
, PIOCLWPIDS
, lwps
))
5024 print_sys_errmsg (pip
->pathname
, errno
);
5025 error ("PIOCLWPIDS failed");
5027 #else /* PIOCLWPIDS */
5029 lwps
= alloca ((2 * nlwp
+ 2) * sizeof *lwps
);
5031 #endif /* PIOCLWPIDS */
5033 for (; nlwp
> 0; nlwp
--, lwps
++)
5035 pip
= find_procinfo ((*lwps
<< 16) | pid
, 1);
5039 pip
= (struct procinfo
*) xmalloc (sizeof (struct procinfo
));
5040 memset (pip
, 0, sizeof (*pip
));
5041 if (!open_proc_file ((*lwps
<< 16) | pid
, pip
, O_RDONLY
, 0))
5044 make_cleanup_close_proc_file (pip
);
5046 if (!procfs_read_status (pip
))
5048 print_sys_errmsg (pip
->pathname
, errno
);
5049 error ("procfs_read_status failed");
5053 #endif /* PROCFS_USE_READ_WRITE */
5055 /* Print verbose information of the requested type(s), or just a summary
5056 of the information for all types. */
5058 printf_filtered ("\nInformation for %s.%d:\n\n", pip
->pathname
, *lwps
);
5059 if (summary
|| all
|| flags
)
5061 info_proc_flags (pip
, summary
);
5065 info_proc_stop (pip
, summary
);
5067 supply_gregset (&pip
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
);
5069 supply_gregset (&pip
->prstatus
.pr_reg
);
5071 printf_filtered ("PC: ");
5072 print_address (read_pc (), gdb_stdout
);
5073 printf_filtered ("\n");
5075 if (summary
|| all
|| signals
|| faults
)
5077 info_proc_siginfo (pip
, summary
);
5079 if (summary
|| all
|| syscalls
)
5081 info_proc_syscalls (pip
, summary
);
5083 if (summary
|| all
|| mappings
)
5085 info_proc_mappings (pip
, summary
);
5087 if (summary
|| all
|| signals
)
5089 info_proc_signals (pip
, summary
);
5091 if (summary
|| all
|| faults
)
5093 info_proc_faults (pip
, summary
);
5095 printf_filtered ("\n");
5097 /* All done, deal with closing any temporary process info structure,
5098 freeing temporary memory , etc. */
5100 do_cleanups (old_chain
);
5101 #ifndef PROCFS_USE_READ_WRITE
5110 modify_inherit_on_fork_flag - Change the inherit-on-fork flag
5114 void modify_inherit_on_fork_flag (fd, flag)
5118 Call this routine to modify the inherit-on-fork flag. This routine is
5119 just a nice wrapper to hide the #ifdefs needed by various systems to
5125 modify_inherit_on_fork_flag (fd
, flag
)
5129 #if defined (PIOCSET) || defined (PCSET)
5133 #ifdef PROCFS_USE_READ_WRITE
5134 struct proc_ctl pctl
;
5137 #if defined (PIOCSET) || defined (PCSET) /* New method */
5141 #ifdef PROCFS_USE_READ_WRITE
5143 pctl
.data
= PR_FORK
;
5144 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5147 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5152 #ifdef PROCFS_USE_READ_WRITE
5154 pctl
.data
= PR_FORK
;
5155 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5158 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5163 #ifdef PIOCSFORK /* Original method */
5166 retval
= ioctl (fd
, PIOCSFORK
, NULL
);
5170 retval
= ioctl (fd
, PIOCRFORK
, NULL
);
5173 Neither PR_FORK nor PIOCSFORK exist
! !!
5180 print_sys_errmsg ("modify_inherit_on_fork_flag", errno
);
5181 error ("PIOCSFORK or PR_FORK modification failed");
5188 modify_run_on_last_close_flag - Change the run-on-last-close flag
5192 void modify_run_on_last_close_flag (fd, flag)
5196 Call this routine to modify the run-on-last-close flag. This routine
5197 is just a nice wrapper to hide the #ifdefs needed by various systems to
5203 modify_run_on_last_close_flag (fd
, flag
)
5207 #if defined (PIOCSET) || defined (PCSET)
5211 #ifdef PROCFS_USE_READ_WRITE
5212 struct proc_ctl pctl
;
5215 #if defined (PIOCSET) || defined (PCSET) /* New method */
5219 #ifdef PROCFS_USE_READ_WRITE
5222 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5225 retval
= ioctl (fd
, PIOCSET
, &pr_flags
);
5230 #ifdef PROCFS_USE_READ_WRITE
5233 if (write (fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5236 retval
= ioctl (fd
, PIOCRESET
, &pr_flags
);
5241 #ifdef PIOCSRLC /* Original method */
5243 retval
= ioctl (fd
, PIOCSRLC
, NULL
);
5245 retval
= ioctl (fd
, PIOCRRLC
, NULL
);
5247 Neither PR_RLC nor PIOCSRLC exist
! !!
5254 print_sys_errmsg ("modify_run_on_last_close_flag", errno
);
5255 error ("PIOCSRLC or PR_RLC modification failed");
5262 procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
5266 void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
5270 This function function disables traps for the specified system call.
5271 errok is non-zero if errors should be ignored.
5275 procfs_clear_syscall_trap (pi
, syscall_num
, errok
)
5276 struct procinfo
*pi
;
5284 goterr
= ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0;
5286 if (goterr
&& !errok
)
5288 print_sys_errmsg (pi
->pathname
, errno
);
5289 error ("PIOCGENTRY failed");
5294 prdelset (&sysset
, syscall_num
);
5296 if ((ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0) && !errok
)
5298 print_sys_errmsg (pi
->pathname
, errno
);
5299 error ("PIOCSENTRY failed");
5303 goterr
= ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0;
5305 if (goterr
&& !errok
)
5307 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5308 print_sys_errmsg (pi
->pathname
, errno
);
5309 error ("PIOCGEXIT failed");
5314 praddset (&sysset
, syscall_num
);
5316 if ((ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0) && !errok
)
5318 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5319 print_sys_errmsg (pi
->pathname
, errno
);
5320 error ("PIOCSEXIT failed");
5325 if (!pi
->syscall_handlers
)
5328 error ("procfs_clear_syscall_trap: syscall_handlers is empty");
5332 /* Remove handler func from the handler list */
5334 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5335 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5337 if (i
+ 1 != pi
->num_syscall_handlers
)
5338 { /* Not the last entry.
5339 Move subsequent entries fwd. */
5340 memcpy (&pi
->syscall_handlers
[i
], &pi
->syscall_handlers
[i
+ 1],
5341 (pi
->num_syscall_handlers
- i
- 1)
5342 * sizeof (struct procfs_syscall_handler
));
5345 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
,
5346 (pi
->num_syscall_handlers
- 1)
5347 * sizeof (struct procfs_syscall_handler
));
5348 pi
->num_syscall_handlers
--;
5353 error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
5361 procfs_set_syscall_trap -- arrange for a function to be called when the
5362 child executes the specified system call.
5366 void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
5367 syscall_func_t *function)
5371 This function sets up an entry and/or exit trap for the specified system
5372 call. When the child executes the specified system call, your function
5373 will be called with the call #, a flag that indicates entry or exit, and
5374 pointers to rtnval and statval (which are used by procfs_wait). The
5375 function should return non-zero if something interesting happened, zero
5380 procfs_set_syscall_trap (pi
, syscall_num
, flags
, func
)
5381 struct procinfo
*pi
;
5384 syscall_func_t
*func
;
5389 if (flags
& PROCFS_SYSCALL_ENTRY
)
5391 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysset
) < 0)
5393 print_sys_errmsg (pi
->pathname
, errno
);
5394 error ("PIOCGENTRY failed");
5397 praddset (&sysset
, syscall_num
);
5399 if (ioctl (pi
->ctl_fd
, PIOCSENTRY
, &sysset
) < 0)
5401 print_sys_errmsg (pi
->pathname
, errno
);
5402 error ("PIOCSENTRY failed");
5406 if (flags
& PROCFS_SYSCALL_EXIT
)
5408 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysset
) < 0)
5410 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5411 print_sys_errmsg (pi
->pathname
, errno
);
5412 error ("PIOCGEXIT failed");
5415 praddset (&sysset
, syscall_num
);
5417 if (ioctl (pi
->ctl_fd
, PIOCSEXIT
, &sysset
) < 0)
5419 procfs_clear_syscall_trap (pi
, syscall_num
, 1);
5420 print_sys_errmsg (pi
->pathname
, errno
);
5421 error ("PIOCSEXIT failed");
5426 if (!pi
->syscall_handlers
)
5428 pi
->syscall_handlers
= xmalloc (sizeof (struct procfs_syscall_handler
));
5429 pi
->syscall_handlers
[0].syscall_num
= syscall_num
;
5430 pi
->syscall_handlers
[0].func
= func
;
5431 pi
->num_syscall_handlers
= 1;
5437 for (i
= 0; i
< pi
->num_syscall_handlers
; i
++)
5438 if (pi
->syscall_handlers
[i
].syscall_num
== syscall_num
)
5440 pi
->syscall_handlers
[i
].func
= func
;
5444 pi
->syscall_handlers
= xrealloc (pi
->syscall_handlers
, (i
+ 1)
5445 * sizeof (struct procfs_syscall_handler
));
5446 pi
->syscall_handlers
[i
].syscall_num
= syscall_num
;
5447 pi
->syscall_handlers
[i
].func
= func
;
5448 pi
->num_syscall_handlers
++;
5452 #ifdef SYS_lwp_create
5458 procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
5462 int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
5466 This routine is called both when an inferior process and it's new lwp
5467 are about to finish a _lwp_create() system call. This is the system
5468 call that Solaris uses to create a lightweight process. When the
5469 target process gets this event, we can look at sysarg[2] to find the
5470 new childs lwp ID, and create a procinfo struct from that. After that,
5471 we pretend that we got a SIGTRAP, and return non-zero to tell
5472 procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
5473 sees the new process and continues it.
5475 When we see the child exiting from lwp_create, we just contine it,
5476 since everything was handled when the parent trapped.
5479 In effect, we are only paying attention to the parent's completion of
5480 the lwp_create syscall. If we only paid attention to the child
5481 instead, then we wouldn't detect the creation of a suspended thread.
5485 procfs_lwp_creation_handler (pi
, syscall_num
, why
, rtnvalp
, statvalp
)
5486 struct procinfo
*pi
;
5493 struct procinfo
*childpi
;
5495 struct proc_ctl pctl
;
5498 /* We've just detected the completion of an lwp_create system call. Now we
5499 need to setup a procinfo struct for this thread, and notify the thread
5500 system of the new arrival. */
5502 /* If lwp_create failed, then nothing interesting happened. Continue the
5503 process and go back to sleep. */
5506 /* Joel ... can you check this logic out please? JKJ */
5507 if (pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
[R_EFL
] & 1)
5508 { /* _lwp_create failed */
5510 pctl
.data
= PRCFAULT
;
5512 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5513 perror_with_name (pi
->pathname
);
5517 #else /* UNIXWARE */
5518 if (PROCFS_GET_CARRY (pi
->prstatus
.pr_reg
))
5519 { /* _lwp_create failed */
5520 pi
->prrun
.pr_flags
&= PRSTEP
;
5521 pi
->prrun
.pr_flags
|= PRCFAULT
;
5523 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5524 perror_with_name (pi
->pathname
);
5530 /* At this point, the new thread is stopped at it's first instruction, and
5531 the parent is stopped at the exit from lwp_create. */
5533 if (pi
->new_child
) /* Child? */
5534 { /* Yes, just continue it */
5537 pctl
.data
= PRCFAULT
;
5539 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5540 #else /* !UNIXWARE */
5541 pi
->prrun
.pr_flags
&= PRSTEP
;
5542 pi
->prrun
.pr_flags
|= PRCFAULT
;
5544 if ((pi
->prstatus
.pr_flags
& PR_ISTOP
)
5545 && ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5546 #endif /* !UNIXWARE */
5547 perror_with_name (pi
->pathname
);
5549 pi
->new_child
= 0; /* No longer new */
5554 /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
5555 in the child and continue the parent. */
5557 /* Third arg is pointer to new thread id. */
5558 lwp_id
= read_memory_integer (
5559 THE_PR_LWP (pi
->prstatus
).pr_sysarg
[2], sizeof (int));
5561 lwp_id
= (lwp_id
<< 16) | PIDGET (pi
->pid
);
5563 childpi
= create_procinfo (lwp_id
);
5565 /* The new process has actually inherited the lwp_create syscall trap from
5566 it's parent, but we still have to call this to register handlers for
5569 procfs_set_inferior_syscall_traps (childpi
);
5570 add_thread (lwp_id
);
5571 printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id
));
5573 /* Continue the parent */
5576 pctl
.data
= PRCFAULT
;
5578 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5580 pi
->prrun
.pr_flags
&= PRSTEP
;
5581 pi
->prrun
.pr_flags
|= PRCFAULT
;
5582 if (ioctl (pi
->ctl_fd
, PIOCRUN
, &pi
->prrun
) != 0)
5584 perror_with_name (pi
->pathname
);
5586 /* The new child may have been created in one of two states:
5587 SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
5588 If suspended, we flag it to be continued later, when it has an event. */
5590 if (THE_PR_LWP (childpi
->prstatus
).pr_why
== PR_SUSPENDED
)
5591 childpi
->new_child
= 1; /* Flag this as an unseen child process */
5594 /* Continue the child */
5597 pctl
.data
= PRCFAULT
;
5599 if (write (pi
->ctl_fd
, (char *) &pctl
, sizeof (struct proc_ctl
)) < 0)
5601 childpi
->prrun
.pr_flags
&= PRSTEP
;
5602 childpi
->prrun
.pr_flags
|= PRCFAULT
;
5604 if (ioctl (childpi
->ctl_fd
, PIOCRUN
, &childpi
->prrun
) != 0)
5606 perror_with_name (childpi
->pathname
);
5610 #endif /* SYS_lwp_create */
5612 /* Fork an inferior process, and start debugging it with /proc. */
5615 procfs_create_inferior (exec_file
, allargs
, env
)
5620 char *shell_file
= getenv ("SHELL");
5622 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
5625 /* We will be looking down the PATH to find shell_file. If we
5626 just do this the normal way (via execlp, which operates by
5627 attempting an exec for each element of the PATH until it
5628 finds one which succeeds), then there will be an exec for
5629 each failed attempt, each of which will cause a PR_SYSEXIT
5630 stop, and we won't know how to distinguish the PR_SYSEXIT's
5631 for these failed execs with the ones for successful execs
5632 (whether the exec has succeeded is stored at that time in the
5633 carry bit or some such architecture-specific and
5634 non-ABI-specified place).
5636 So I can't think of anything better than to search the PATH
5637 now. This has several disadvantages: (1) There is a race
5638 condition; if we find a file now and it is deleted before we
5639 exec it, we lose, even if the deletion leaves a valid file
5640 further down in the PATH, (2) there is no way to know exactly
5641 what an executable (in the sense of "capable of being
5642 exec'd") file is. Using access() loses because it may lose
5643 if the caller is the superuser; failing to use it loses if
5644 there are ACLs or some such. */
5648 /* FIXME-maybe: might want "set path" command so user can change what
5649 path is used from within GDB. */
5650 char *path
= getenv ("PATH");
5652 struct stat statbuf
;
5655 path
= "/bin:/usr/bin";
5657 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
5658 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1 : NULL
)
5660 p1
= strchr (p
, ':');
5665 strncpy (tryname
, p
, len
);
5666 tryname
[len
] = '\0';
5667 strcat (tryname
, "/");
5668 strcat (tryname
, shell_file
);
5669 if (access (tryname
, X_OK
) < 0)
5671 if (stat (tryname
, &statbuf
) < 0)
5673 if (!S_ISREG (statbuf
.st_mode
))
5674 /* We certainly need to reject directories. I'm not quite
5675 as sure about FIFOs, sockets, etc., but I kind of doubt
5676 that people want to exec() these things. */
5681 /* Not found. This must be an error rather than merely passing
5682 the file to execlp(), because execlp() would try all the
5683 exec()s, causing GDB to get confused. */
5684 error ("Can't find shell %s in PATH", shell_file
);
5686 shell_file
= tryname
;
5689 fork_inferior (exec_file
, allargs
, env
,
5690 proc_set_exec_trap
, procfs_init_inferior
, NULL
, shell_file
);
5692 /* We are at the first instruction we care about. */
5693 /* Pedal to the metal... */
5695 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
5698 /* Clean up after the inferior dies. */
5701 procfs_mourn_inferior ()
5703 struct procinfo
*pi
;
5704 struct procinfo
*next_pi
;
5706 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5709 unconditionally_kill_inferior (pi
);
5712 unpush_target (&procfs_ops
);
5713 generic_mourn_inferior ();
5717 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
5721 /* This variable is controlled by modules that sit atop procfs that may layer
5722 their own process structure atop that provided here. sol-thread.c does
5723 this because of the Solaris two-level thread model. */
5725 return !procfs_suppress_run
;
5727 #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
5730 /* Insert a watchpoint */
5732 procfs_set_watchpoint (pid
, addr
, len
, rw
)
5738 struct procinfo
*pi
;
5741 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5742 wpt
.pr_vaddr
= (caddr_t
) addr
;
5744 wpt
.pr_wflags
= ((rw
& 1) ? MA_READ
: 0) | ((rw
& 2) ? MA_WRITE
: 0);
5745 if (ioctl (pi
->ctl_fd
, PIOCSWATCH
, &wpt
) < 0)
5749 /* Currently it sometimes happens that the same watchpoint gets
5750 deleted twice - don't die in this case (FIXME please) */
5751 if (errno
== ESRCH
&& len
== 0)
5753 print_sys_errmsg (pi
->pathname
, errno
);
5754 error ("PIOCSWATCH failed");
5760 procfs_stopped_by_watchpoint (pid
)
5763 struct procinfo
*pi
;
5767 pi
= find_procinfo (pid
== -1 ? inferior_pid
: pid
, 0);
5768 if (pi
->prstatus
.pr_flags
& (PR_STOPPED
| PR_ISTOP
))
5770 why
= pi
->prstatus
.pr_why
;
5771 what
= pi
->prstatus
.pr_what
;
5772 if (why
== PR_FAULTED
5773 #if defined (FLTWATCH) && defined (FLTKWATCH)
5774 && (what
== FLTWATCH
|| what
== FLTKWATCH
)
5777 && (what
== FLTWATCH
)
5780 && (what
== FLTKWATCH
)
5788 #endif /* !UNIXWARE */
5789 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
5791 /* Why is this necessary? Shouldn't dead threads just be removed from the
5795 procfs_thread_alive (pid
)
5798 struct procinfo
*pi
, *next_pi
;
5800 for (pi
= procinfo_list
; pi
; pi
= next_pi
)
5805 if (procfs_read_status (pi
)) /* alive */
5808 /* defunct (exited) */
5810 close_proc_file (pi
);
5819 procfs_first_available ()
5821 struct procinfo
*pi
;
5823 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
5825 if (procfs_read_status (pi
))
5832 procfs_get_pid_fd (pid
)
5835 struct procinfo
*pi
= find_procinfo (pid
, 1);
5843 /* Send a SIGINT to the process group. This acts just like the user typed a
5844 ^C on the controlling terminal.
5846 XXX - This may not be correct for all systems. Some may want to use
5847 killpg() instead of kill (-pgrp). */
5852 extern pid_t inferior_process_group
;
5854 kill (-inferior_process_group
, SIGINT
);
5857 /* Convert a pid to printable form. */
5861 procfs_pid_to_str (pid
)
5864 static char buf
[100];
5866 sprintf (buf
, "Kernel thread %d", TIDGET (pid
));
5876 procfs_ops
.to_shortname
= "procfs";
5877 procfs_ops
.to_longname
= "Unix /proc child process";
5878 procfs_ops
.to_doc
= "Unix /proc child process (started by the \"run\" command).";
5879 procfs_ops
.to_open
= procfs_open
;
5880 procfs_ops
.to_attach
= procfs_attach
;
5881 procfs_ops
.to_detach
= procfs_detach
;
5882 procfs_ops
.to_resume
= procfs_resume
;
5883 procfs_ops
.to_wait
= procfs_wait
;
5884 procfs_ops
.to_fetch_registers
= procfs_fetch_registers
;
5885 procfs_ops
.to_store_registers
= procfs_store_registers
;
5886 procfs_ops
.to_prepare_to_store
= procfs_prepare_to_store
;
5887 procfs_ops
.to_xfer_memory
= procfs_xfer_memory
;
5888 procfs_ops
.to_files_info
= procfs_files_info
;
5889 procfs_ops
.to_insert_breakpoint
= memory_insert_breakpoint
;
5890 procfs_ops
.to_remove_breakpoint
= memory_remove_breakpoint
;
5891 procfs_ops
.to_terminal_init
= terminal_init_inferior
;
5892 procfs_ops
.to_terminal_inferior
= terminal_inferior
;
5893 procfs_ops
.to_terminal_ours_for_output
= terminal_ours_for_output
;
5894 procfs_ops
.to_terminal_ours
= terminal_ours
;
5895 procfs_ops
.to_terminal_info
= child_terminal_info
;
5896 procfs_ops
.to_kill
= procfs_kill_inferior
;
5897 procfs_ops
.to_create_inferior
= procfs_create_inferior
;
5898 procfs_ops
.to_mourn_inferior
= procfs_mourn_inferior
;
5899 procfs_ops
.to_can_run
= procfs_can_run
;
5900 procfs_ops
.to_notice_signals
= procfs_notice_signals
;
5901 procfs_ops
.to_thread_alive
= procfs_thread_alive
;
5902 procfs_ops
.to_stop
= procfs_stop
;
5903 procfs_ops
.to_stratum
= process_stratum
;
5904 procfs_ops
.to_has_all_memory
= 1;
5905 procfs_ops
.to_has_memory
= 1;
5906 procfs_ops
.to_has_stack
= 1;
5907 procfs_ops
.to_has_registers
= 1;
5908 procfs_ops
.to_has_execution
= 1;
5909 procfs_ops
.to_magic
= OPS_MAGIC
;
5913 _initialize_procfs ()
5915 #ifdef HAVE_OPTIONAL_PROC_FS
5916 char procname
[MAX_PROC_NAME_SIZE
];
5919 /* If we have an optional /proc filesystem (e.g. under OSF/1),
5920 don't add procfs support if we cannot access the running
5922 sprintf (procname
, STATUS_PROC_NAME_FMT
, getpid ());
5923 if ((fd
= open (procname
, O_RDONLY
)) < 0)
5929 add_target (&procfs_ops
);
5931 add_info ("processes", info_proc
,
5932 "Show process status information using /proc entry.\n\
5933 Specify process id or use current inferior by default.\n\
5934 Specify keywords for detailed information; default is summary.\n\
5935 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
5936 `status', `syscalls', and `times'.\n\
5937 Unambiguous abbreviations may be used.");
5939 init_syscall_table ();