1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
3 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
6 Written by Michael Snyder at Cygnus Solutions.
7 Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation,
23 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 #include "elf-bfd.h" /* for elfcore_write_* */
31 #include "gdbthread.h"
33 #if defined (NEW_PROC_API)
34 #define _STRUCTURED_PROC 1 /* Should be done by configure script. */
37 #include <sys/procfs.h>
38 #ifdef HAVE_SYS_FAULT_H
39 #include <sys/fault.h>
41 #ifdef HAVE_SYS_SYSCALL_H
42 #include <sys/syscall.h>
44 #include <sys/errno.h>
48 #include "gdb_string.h"
49 #include "gdb_assert.h"
56 * This module provides the interface between GDB and the
57 * /proc file system, which is used on many versions of Unix
58 * as a means for debuggers to control other processes.
59 * Examples of the systems that use this interface are:
66 * /proc works by imitating a file system: you open a simulated file
67 * that represents the process you wish to interact with, and
68 * perform operations on that "file" in order to examine or change
69 * the state of the other process.
71 * The most important thing to know about /proc and this module
72 * is that there are two very different interfaces to /proc:
73 * One that uses the ioctl system call, and
74 * another that uses read and write system calls.
75 * This module has to support both /proc interfaces. This means
76 * that there are two different ways of doing every basic operation.
78 * In order to keep most of the code simple and clean, I have
79 * defined an interface "layer" which hides all these system calls.
80 * An ifdef (NEW_PROC_API) determines which interface we are using,
81 * and most or all occurrances of this ifdef should be confined to
82 * this interface layer.
86 /* Determine which /proc API we are using:
87 The ioctl API defines PIOCSTATUS, while
88 the read/write (multiple fd) API never does. */
91 #include <sys/types.h>
92 #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */
95 #include <fcntl.h> /* for O_RDONLY */
96 #include <unistd.h> /* for "X_OK" */
97 #include "gdb_stat.h" /* for struct stat */
99 /* Note: procfs-utils.h must be included after the above system header
100 files, because it redefines various system calls using macros.
101 This may be incompatible with the prototype declarations. */
103 #include "proc-utils.h"
105 /* Prototypes for supply_gregset etc. */
108 /* =================== TARGET_OPS "MODULE" =================== */
111 * This module defines the GDB target vector and its methods.
114 static void procfs_open (char *, int);
115 static void procfs_attach (char *, int);
116 static void procfs_detach (char *, int);
117 static void procfs_resume (ptid_t
, int, enum target_signal
);
118 static int procfs_can_run (void);
119 static void procfs_stop (void);
120 static void procfs_files_info (struct target_ops
*);
121 static void procfs_fetch_registers (int);
122 static void procfs_store_registers (int);
123 static void procfs_notice_signals (ptid_t
);
124 static void procfs_prepare_to_store (void);
125 static void procfs_kill_inferior (void);
126 static void procfs_mourn_inferior (void);
127 static void procfs_create_inferior (char *, char *, char **, int);
128 static ptid_t
procfs_wait (ptid_t
, struct target_waitstatus
*);
129 static int procfs_xfer_memory (CORE_ADDR
, char *, int, int,
130 struct mem_attrib
*attrib
,
131 struct target_ops
*);
132 static LONGEST
procfs_xfer_partial (struct target_ops
*ops
,
133 enum target_object object
,
135 void *readbuf
, const void *writebuf
,
136 ULONGEST offset
, LONGEST len
);
138 static int procfs_thread_alive (ptid_t
);
140 void procfs_find_new_threads (void);
141 char *procfs_pid_to_str (ptid_t
);
143 static int proc_find_memory_regions (int (*) (CORE_ADDR
,
149 static char * procfs_make_note_section (bfd
*, int *);
151 static int procfs_can_use_hw_breakpoint (int, int, int);
153 struct target_ops procfs_ops
; /* the target vector */
156 init_procfs_ops (void)
158 procfs_ops
.to_shortname
= "procfs";
159 procfs_ops
.to_longname
= "Unix /proc child process";
161 "Unix /proc child process (started by the \"run\" command).";
162 procfs_ops
.to_open
= procfs_open
;
163 procfs_ops
.to_can_run
= procfs_can_run
;
164 procfs_ops
.to_create_inferior
= procfs_create_inferior
;
165 procfs_ops
.to_kill
= procfs_kill_inferior
;
166 procfs_ops
.to_mourn_inferior
= procfs_mourn_inferior
;
167 procfs_ops
.to_attach
= procfs_attach
;
168 procfs_ops
.to_detach
= procfs_detach
;
169 procfs_ops
.to_wait
= procfs_wait
;
170 procfs_ops
.to_resume
= procfs_resume
;
171 procfs_ops
.to_prepare_to_store
= procfs_prepare_to_store
;
172 procfs_ops
.to_fetch_registers
= procfs_fetch_registers
;
173 procfs_ops
.to_store_registers
= procfs_store_registers
;
174 procfs_ops
.to_xfer_partial
= procfs_xfer_partial
;
175 procfs_ops
.deprecated_xfer_memory
= procfs_xfer_memory
;
176 procfs_ops
.to_insert_breakpoint
= memory_insert_breakpoint
;
177 procfs_ops
.to_remove_breakpoint
= memory_remove_breakpoint
;
178 procfs_ops
.to_notice_signals
= procfs_notice_signals
;
179 procfs_ops
.to_files_info
= procfs_files_info
;
180 procfs_ops
.to_stop
= procfs_stop
;
182 procfs_ops
.to_terminal_init
= terminal_init_inferior
;
183 procfs_ops
.to_terminal_inferior
= terminal_inferior
;
184 procfs_ops
.to_terminal_ours_for_output
= terminal_ours_for_output
;
185 procfs_ops
.to_terminal_ours
= terminal_ours
;
186 procfs_ops
.to_terminal_save_ours
= terminal_save_ours
;
187 procfs_ops
.to_terminal_info
= child_terminal_info
;
189 procfs_ops
.to_find_new_threads
= procfs_find_new_threads
;
190 procfs_ops
.to_thread_alive
= procfs_thread_alive
;
191 procfs_ops
.to_pid_to_str
= procfs_pid_to_str
;
193 procfs_ops
.to_has_all_memory
= 1;
194 procfs_ops
.to_has_memory
= 1;
195 procfs_ops
.to_has_execution
= 1;
196 procfs_ops
.to_has_stack
= 1;
197 procfs_ops
.to_has_registers
= 1;
198 procfs_ops
.to_stratum
= process_stratum
;
199 procfs_ops
.to_has_thread_control
= tc_schedlock
;
200 procfs_ops
.to_find_memory_regions
= proc_find_memory_regions
;
201 procfs_ops
.to_make_corefile_notes
= procfs_make_note_section
;
202 procfs_ops
.to_can_use_hw_breakpoint
= procfs_can_use_hw_breakpoint
;
203 procfs_ops
.to_magic
= OPS_MAGIC
;
206 /* =================== END, TARGET_OPS "MODULE" =================== */
211 * Put any typedefs, defines etc. here that are required for
212 * the unification of code that handles different versions of /proc.
215 #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */
217 enum { READ_WATCHFLAG
= WA_READ
,
218 WRITE_WATCHFLAG
= WA_WRITE
,
219 EXEC_WATCHFLAG
= WA_EXEC
,
220 AFTER_WATCHFLAG
= WA_TRAPAFTER
223 #else /* Irix method for watchpoints */
224 enum { READ_WATCHFLAG
= MA_READ
,
225 WRITE_WATCHFLAG
= MA_WRITE
,
226 EXEC_WATCHFLAG
= MA_EXEC
,
227 AFTER_WATCHFLAG
= 0 /* trapafter not implemented */
232 #ifdef HAVE_PR_SIGSET_T
233 typedef pr_sigset_t gdb_sigset_t
;
235 typedef sigset_t gdb_sigset_t
;
239 #ifdef HAVE_PR_SIGACTION64_T
240 typedef pr_sigaction64_t gdb_sigaction_t
;
242 typedef struct sigaction gdb_sigaction_t
;
246 #ifdef HAVE_PR_SIGINFO64_T
247 typedef pr_siginfo64_t gdb_siginfo_t
;
249 typedef struct siginfo gdb_siginfo_t
;
252 /* gdb_premptysysset */
254 #define gdb_premptysysset premptysysset
256 #define gdb_premptysysset premptyset
261 #define gdb_praddsysset praddsysset
263 #define gdb_praddsysset praddset
268 #define gdb_prdelsysset prdelsysset
270 #define gdb_prdelsysset prdelset
273 /* prissyssetmember */
274 #ifdef prissyssetmember
275 #define gdb_pr_issyssetmember prissyssetmember
277 #define gdb_pr_issyssetmember prismember
280 /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't
281 as intuitively descriptive as it could be, so we'll define
282 DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of
283 this writing, this feature is only found on AIX5 systems and
284 basically means that the set of syscalls is not fixed. I.e,
285 there's no nice table that one can #include to get all of the
286 syscall numbers. Instead, they're stored in /proc/PID/sysent
287 for each process. We are at least guaranteed that they won't
288 change over the lifetime of the process. But each process could
289 (in theory) have different syscall numbers.
291 #ifdef HAVE_PRSYSENT_T
292 #define DYNAMIC_SYSCALLS
297 /* =================== STRUCT PROCINFO "MODULE" =================== */
299 /* FIXME: this comment will soon be out of date W.R.T. threads. */
301 /* The procinfo struct is a wrapper to hold all the state information
302 concerning a /proc process. There should be exactly one procinfo
303 for each process, and since GDB currently can debug only one
304 process at a time, that means there should be only one procinfo.
305 All of the LWP's of a process can be accessed indirectly thru the
306 single process procinfo.
308 However, against the day when GDB may debug more than one process,
309 this data structure is kept in a list (which for now will hold no
310 more than one member), and many functions will have a pointer to a
311 procinfo as an argument.
313 There will be a separate procinfo structure for use by the (not yet
314 implemented) "info proc" command, so that we can print useful
315 information about any random process without interfering with the
316 inferior's procinfo information. */
319 /* format strings for /proc paths */
320 # ifndef CTL_PROC_NAME_FMT
321 # define MAIN_PROC_NAME_FMT "/proc/%d"
322 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
323 # define AS_PROC_NAME_FMT "/proc/%d/as"
324 # define MAP_PROC_NAME_FMT "/proc/%d/map"
325 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
326 # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus")
328 /* the name of the proc status struct depends on the implementation */
329 typedef pstatus_t gdb_prstatus_t
;
330 typedef lwpstatus_t gdb_lwpstatus_t
;
331 #else /* ! NEW_PROC_API */
332 /* format strings for /proc paths */
333 # ifndef CTL_PROC_NAME_FMT
334 # define MAIN_PROC_NAME_FMT "/proc/%05d"
335 # define CTL_PROC_NAME_FMT "/proc/%05d"
336 # define AS_PROC_NAME_FMT "/proc/%05d"
337 # define MAP_PROC_NAME_FMT "/proc/%05d"
338 # define STATUS_PROC_NAME_FMT "/proc/%05d"
339 # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp")
341 /* the name of the proc status struct depends on the implementation */
342 typedef prstatus_t gdb_prstatus_t
;
343 typedef prstatus_t gdb_lwpstatus_t
;
344 #endif /* NEW_PROC_API */
346 typedef struct procinfo
{
347 struct procinfo
*next
;
348 int pid
; /* Process ID */
349 int tid
; /* Thread/LWP id */
353 int ignore_next_sigstop
;
355 /* The following four fd fields may be identical, or may contain
356 several different fd's, depending on the version of /proc
357 (old ioctl or new read/write). */
359 int ctl_fd
; /* File descriptor for /proc control file */
361 * The next three file descriptors are actually only needed in the
362 * read/write, multiple-file-descriptor implemenation (NEW_PROC_API).
363 * However, to avoid a bunch of #ifdefs in the code, we will use
364 * them uniformly by (in the case of the ioctl single-file-descriptor
365 * implementation) filling them with copies of the control fd.
367 int status_fd
; /* File descriptor for /proc status file */
368 int as_fd
; /* File descriptor for /proc as file */
370 char pathname
[MAX_PROC_NAME_SIZE
]; /* Pathname to /proc entry */
372 fltset_t saved_fltset
; /* Saved traced hardware fault set */
373 gdb_sigset_t saved_sigset
; /* Saved traced signal set */
374 gdb_sigset_t saved_sighold
; /* Saved held signal set */
375 sysset_t
*saved_exitset
; /* Saved traced system call exit set */
376 sysset_t
*saved_entryset
; /* Saved traced system call entry set */
378 gdb_prstatus_t prstatus
; /* Current process status info */
381 gdb_fpregset_t fpregset
; /* Current floating point registers */
384 #ifdef DYNAMIC_SYSCALLS
385 int num_syscalls
; /* Total number of syscalls */
386 char **syscall_names
; /* Syscall number to name map */
389 struct procinfo
*thread_list
;
391 int status_valid
: 1;
393 int fpregs_valid
: 1;
394 int threads_valid
: 1;
397 static char errmsg
[128]; /* shared error msg buffer */
399 /* Function prototypes for procinfo module: */
401 static procinfo
*find_procinfo_or_die (int pid
, int tid
);
402 static procinfo
*find_procinfo (int pid
, int tid
);
403 static procinfo
*create_procinfo (int pid
, int tid
);
404 static void destroy_procinfo (procinfo
* p
);
405 static void do_destroy_procinfo_cleanup (void *);
406 static void dead_procinfo (procinfo
* p
, char *msg
, int killp
);
407 static int open_procinfo_files (procinfo
* p
, int which
);
408 static void close_procinfo_files (procinfo
* p
);
409 static int sysset_t_size (procinfo
*p
);
410 static sysset_t
*sysset_t_alloc (procinfo
* pi
);
411 #ifdef DYNAMIC_SYSCALLS
412 static void load_syscalls (procinfo
*pi
);
413 static void free_syscalls (procinfo
*pi
);
414 static int find_syscall (procinfo
*pi
, char *name
);
415 #endif /* DYNAMIC_SYSCALLS */
417 /* The head of the procinfo list: */
418 static procinfo
* procinfo_list
;
421 * Function: find_procinfo
423 * Search the procinfo list.
425 * Returns: pointer to procinfo, or NULL if not found.
429 find_procinfo (int pid
, int tid
)
433 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
440 /* Don't check threads_valid. If we're updating the
441 thread_list, we want to find whatever threads are already
442 here. This means that in general it is the caller's
443 responsibility to check threads_valid and update before
444 calling find_procinfo, if the caller wants to find a new
447 for (pi
= pi
->thread_list
; pi
; pi
= pi
->next
)
456 * Function: find_procinfo_or_die
458 * Calls find_procinfo, but errors on failure.
462 find_procinfo_or_die (int pid
, int tid
)
464 procinfo
*pi
= find_procinfo (pid
, tid
);
469 error ("procfs: couldn't find pid %d (kernel thread %d) in procinfo list.",
472 error ("procfs: couldn't find pid %d in procinfo list.", pid
);
477 /* open_with_retry() is a wrapper for open(). The appropriate
478 open() call is attempted; if unsuccessful, it will be retried as
479 many times as needed for the EAGAIN and EINTR conditions.
481 For other conditions, open_with_retry() will retry the open() a
482 limited number of times. In addition, a short sleep is imposed
483 prior to retrying the open(). The reason for this sleep is to give
484 the kernel a chance to catch up and create the file in question in
485 the event that GDB "wins" the race to open a file before the kernel
489 open_with_retry (const char *pathname
, int flags
)
491 int retries_remaining
, status
;
493 retries_remaining
= 2;
497 status
= open (pathname
, flags
);
499 if (status
>= 0 || retries_remaining
== 0)
501 else if (errno
!= EINTR
&& errno
!= EAGAIN
)
512 * Function: open_procinfo_files
514 * Open the file descriptor for the process or LWP.
515 * ifdef NEW_PROC_API, we only open the control file descriptor;
516 * the others are opened lazily as needed.
517 * else (if not NEW_PROC_API), there is only one real
518 * file descriptor, but we keep multiple copies of it so that
519 * the code that uses them does not have to be #ifdef'd.
521 * Return: file descriptor, or zero for failure.
524 enum { FD_CTL
, FD_STATUS
, FD_AS
};
527 open_procinfo_files (procinfo
*pi
, int which
)
530 char tmp
[MAX_PROC_NAME_SIZE
];
535 * This function is getting ALMOST long enough to break up into several.
536 * Here is some rationale:
538 * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware):
539 * There are several file descriptors that may need to be open
540 * for any given process or LWP. The ones we're intereted in are:
541 * - control (ctl) write-only change the state
542 * - status (status) read-only query the state
543 * - address space (as) read/write access memory
544 * - map (map) read-only virtual addr map
545 * Most of these are opened lazily as they are needed.
546 * The pathnames for the 'files' for an LWP look slightly
547 * different from those of a first-class process:
548 * Pathnames for a process (<proc-id>):
549 * /proc/<proc-id>/ctl
550 * /proc/<proc-id>/status
552 * /proc/<proc-id>/map
553 * Pathnames for an LWP (lwp-id):
554 * /proc/<proc-id>/lwp/<lwp-id>/lwpctl
555 * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus
556 * An LWP has no map or address space file descriptor, since
557 * the memory map and address space are shared by all LWPs.
559 * Everyone else (Solaris 2.5, Irix, OSF)
560 * There is only one file descriptor for each process or LWP.
561 * For convenience, we copy the same file descriptor into all
562 * three fields of the procinfo struct (ctl_fd, status_fd, and
563 * as_fd, see NEW_PROC_API above) so that code that uses them
564 * doesn't need any #ifdef's.
569 * Each LWP has an independent file descriptor, but these
570 * are not obtained via the 'open' system call like the rest:
571 * instead, they're obtained thru an ioctl call (PIOCOPENLWP)
572 * to the file descriptor of the parent process.
575 * These do not even have their own independent file descriptor.
576 * All operations are carried out on the file descriptor of the
577 * parent process. Therefore we just call open again for each
578 * thread, getting a new handle for the same 'file'.
583 * In this case, there are several different file descriptors that
584 * we might be asked to open. The control file descriptor will be
585 * opened early, but the others will be opened lazily as they are
589 strcpy (tmp
, pi
->pathname
);
590 switch (which
) { /* which file descriptor to open? */
593 strcat (tmp
, "/lwpctl");
595 strcat (tmp
, "/ctl");
596 fd
= open_with_retry (tmp
, O_WRONLY
);
603 return 0; /* there is no 'as' file descriptor for an lwp */
605 fd
= open_with_retry (tmp
, O_RDWR
);
612 strcat (tmp
, "/lwpstatus");
614 strcat (tmp
, "/status");
615 fd
= open_with_retry (tmp
, O_RDONLY
);
621 return 0; /* unknown file descriptor */
623 #else /* not NEW_PROC_API */
625 * In this case, there is only one file descriptor for each procinfo
626 * (ie. each process or LWP). In fact, only the file descriptor for
627 * the process can actually be opened by an 'open' system call.
628 * The ones for the LWPs have to be obtained thru an IOCTL call
629 * on the process's file descriptor.
631 * For convenience, we copy each procinfo's single file descriptor
632 * into all of the fields occupied by the several file descriptors
633 * of the NEW_PROC_API implementation. That way, the code that uses
634 * them can be written without ifdefs.
638 #ifdef PIOCTSTATUS /* OSF */
639 /* Only one FD; just open it. */
640 if ((fd
= open_with_retry (pi
->pathname
, O_RDWR
)) == 0)
642 #else /* Sol 2.5, Irix, other? */
643 if (pi
->tid
== 0) /* Master procinfo for the process */
645 fd
= open_with_retry (pi
->pathname
, O_RDWR
);
649 else /* LWP thread procinfo */
651 #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */
655 /* Find the procinfo for the entire process. */
656 if ((process
= find_procinfo (pi
->pid
, 0)) == NULL
)
659 /* Now obtain the file descriptor for the LWP. */
660 if ((fd
= ioctl (process
->ctl_fd
, PIOCOPENLWP
, &lwpid
)) <= 0)
662 #else /* Irix, other? */
663 return 0; /* Don't know how to open threads */
664 #endif /* Sol 2.5 PIOCOPENLWP */
666 #endif /* OSF PIOCTSTATUS */
667 pi
->ctl_fd
= pi
->as_fd
= pi
->status_fd
= fd
;
668 #endif /* NEW_PROC_API */
670 return 1; /* success */
674 * Function: create_procinfo
676 * Allocate a data structure and link it into the procinfo list.
677 * (First tries to find a pre-existing one (FIXME: why?)
679 * Return: pointer to new procinfo struct.
683 create_procinfo (int pid
, int tid
)
685 procinfo
*pi
, *parent
;
687 if ((pi
= find_procinfo (pid
, tid
)))
688 return pi
; /* Already exists, nothing to do. */
690 /* find parent before doing malloc, to save having to cleanup */
692 parent
= find_procinfo_or_die (pid
, 0); /* FIXME: should I
694 doesn't exist yet? */
696 pi
= (procinfo
*) xmalloc (sizeof (procinfo
));
697 memset (pi
, 0, sizeof (procinfo
));
701 #ifdef DYNAMIC_SYSCALLS
705 pi
->saved_entryset
= sysset_t_alloc (pi
);
706 pi
->saved_exitset
= sysset_t_alloc (pi
);
708 /* Chain into list. */
711 sprintf (pi
->pathname
, MAIN_PROC_NAME_FMT
, pid
);
712 pi
->next
= procinfo_list
;
718 sprintf (pi
->pathname
, "/proc/%05d/lwp/%d", pid
, tid
);
720 sprintf (pi
->pathname
, MAIN_PROC_NAME_FMT
, pid
);
722 pi
->next
= parent
->thread_list
;
723 parent
->thread_list
= pi
;
729 * Function: close_procinfo_files
731 * Close all file descriptors associated with the procinfo
735 close_procinfo_files (procinfo
*pi
)
742 if (pi
->status_fd
> 0)
743 close (pi
->status_fd
);
745 pi
->ctl_fd
= pi
->as_fd
= pi
->status_fd
= 0;
749 * Function: destroy_procinfo
751 * Destructor function. Close, unlink and deallocate the object.
755 destroy_one_procinfo (procinfo
**list
, procinfo
*pi
)
759 /* Step one: unlink the procinfo from its list */
763 for (ptr
= *list
; ptr
; ptr
= ptr
->next
)
766 ptr
->next
= pi
->next
;
770 /* Step two: close any open file descriptors */
771 close_procinfo_files (pi
);
773 /* Step three: free the memory. */
774 #ifdef DYNAMIC_SYSCALLS
777 xfree (pi
->saved_entryset
);
778 xfree (pi
->saved_exitset
);
783 destroy_procinfo (procinfo
*pi
)
787 if (pi
->tid
!= 0) /* destroy a thread procinfo */
789 tmp
= find_procinfo (pi
->pid
, 0); /* find the parent process */
790 destroy_one_procinfo (&tmp
->thread_list
, pi
);
792 else /* destroy a process procinfo and all its threads */
794 /* First destroy the children, if any; */
795 while (pi
->thread_list
!= NULL
)
796 destroy_one_procinfo (&pi
->thread_list
, pi
->thread_list
);
797 /* Then destroy the parent. Genocide!!! */
798 destroy_one_procinfo (&procinfo_list
, pi
);
803 do_destroy_procinfo_cleanup (void *pi
)
805 destroy_procinfo (pi
);
808 enum { NOKILL
, KILL
};
811 * Function: dead_procinfo
813 * To be called on a non_recoverable error for a procinfo.
814 * Prints error messages, optionally sends a SIGKILL to the process,
815 * then destroys the data structure.
819 dead_procinfo (procinfo
*pi
, char *msg
, int kill_p
)
825 print_sys_errmsg (pi
->pathname
, errno
);
829 sprintf (procfile
, "process %d", pi
->pid
);
830 print_sys_errmsg (procfile
, errno
);
833 kill (pi
->pid
, SIGKILL
);
835 destroy_procinfo (pi
);
840 * Function: sysset_t_size
842 * Returns the (complete) size of a sysset_t struct. Normally, this
843 * is just sizeof (syset_t), but in the case of Monterey/64, the actual
844 * size of sysset_t isn't known until runtime.
848 sysset_t_size (procinfo
* pi
)
850 #ifndef DYNAMIC_SYSCALLS
851 return sizeof (sysset_t
);
853 return sizeof (sysset_t
) - sizeof (uint64_t)
854 + sizeof (uint64_t) * ((pi
->num_syscalls
+ (8 * sizeof (uint64_t) - 1))
855 / (8 * sizeof (uint64_t)));
859 /* Function: sysset_t_alloc
861 Allocate and (partially) initialize a sysset_t struct. */
864 sysset_t_alloc (procinfo
* pi
)
867 int size
= sysset_t_size (pi
);
868 ret
= xmalloc (size
);
869 #ifdef DYNAMIC_SYSCALLS
870 ret
->pr_size
= (pi
->num_syscalls
+ (8 * sizeof (uint64_t) - 1))
871 / (8 * sizeof (uint64_t));
876 #ifdef DYNAMIC_SYSCALLS
878 /* Function: load_syscalls
880 Extract syscall numbers and names from /proc/<pid>/sysent. Initialize
881 pi->num_syscalls with the number of syscalls and pi->syscall_names
882 with the names. (Certain numbers may be skipped in which case the
883 names for these numbers will be left as NULL.) */
885 #define MAX_SYSCALL_NAME_LENGTH 256
886 #define MAX_SYSCALLS 65536
889 load_syscalls (procinfo
*pi
)
891 char pathname
[MAX_PROC_NAME_SIZE
];
894 prsyscall_t
*syscalls
;
895 int i
, size
, maxcall
;
897 pi
->num_syscalls
= 0;
898 pi
->syscall_names
= 0;
900 /* Open the file descriptor for the sysent file */
901 sprintf (pathname
, "/proc/%d/sysent", pi
->pid
);
902 sysent_fd
= open_with_retry (pathname
, O_RDONLY
);
905 error ("load_syscalls: Can't open /proc/%d/sysent", pi
->pid
);
908 size
= sizeof header
- sizeof (prsyscall_t
);
909 if (read (sysent_fd
, &header
, size
) != size
)
911 error ("load_syscalls: Error reading /proc/%d/sysent", pi
->pid
);
914 if (header
.pr_nsyscalls
== 0)
916 error ("load_syscalls: /proc/%d/sysent contains no syscalls!", pi
->pid
);
919 size
= header
.pr_nsyscalls
* sizeof (prsyscall_t
);
920 syscalls
= xmalloc (size
);
922 if (read (sysent_fd
, syscalls
, size
) != size
)
925 error ("load_syscalls: Error reading /proc/%d/sysent", pi
->pid
);
928 /* Find maximum syscall number. This may not be the same as
929 pr_nsyscalls since that value refers to the number of entries
930 in the table. (Also, the docs indicate that some system
931 call numbers may be skipped.) */
933 maxcall
= syscalls
[0].pr_number
;
935 for (i
= 1; i
< header
.pr_nsyscalls
; i
++)
936 if (syscalls
[i
].pr_number
> maxcall
937 && syscalls
[i
].pr_nameoff
> 0
938 && syscalls
[i
].pr_number
< MAX_SYSCALLS
)
939 maxcall
= syscalls
[i
].pr_number
;
941 pi
->num_syscalls
= maxcall
+1;
942 pi
->syscall_names
= xmalloc (pi
->num_syscalls
* sizeof (char *));
944 for (i
= 0; i
< pi
->num_syscalls
; i
++)
945 pi
->syscall_names
[i
] = NULL
;
947 /* Read the syscall names in */
948 for (i
= 0; i
< header
.pr_nsyscalls
; i
++)
950 char namebuf
[MAX_SYSCALL_NAME_LENGTH
];
954 if (syscalls
[i
].pr_number
>= MAX_SYSCALLS
955 || syscalls
[i
].pr_number
< 0
956 || syscalls
[i
].pr_nameoff
<= 0
957 || (lseek (sysent_fd
, (off_t
) syscalls
[i
].pr_nameoff
, SEEK_SET
)
958 != (off_t
) syscalls
[i
].pr_nameoff
))
961 nread
= read (sysent_fd
, namebuf
, sizeof namebuf
);
965 callnum
= syscalls
[i
].pr_number
;
967 if (pi
->syscall_names
[callnum
] != NULL
)
969 /* FIXME: Generate warning */
973 namebuf
[nread
-1] = '\0';
974 size
= strlen (namebuf
) + 1;
975 pi
->syscall_names
[callnum
] = xmalloc (size
);
976 strncpy (pi
->syscall_names
[callnum
], namebuf
, size
-1);
977 pi
->syscall_names
[callnum
][size
-1] = '\0';
984 /* Function: free_syscalls
986 Free the space allocated for the syscall names from the procinfo
990 free_syscalls (procinfo
*pi
)
992 if (pi
->syscall_names
)
996 for (i
= 0; i
< pi
->num_syscalls
; i
++)
997 if (pi
->syscall_names
[i
] != NULL
)
998 xfree (pi
->syscall_names
[i
]);
1000 xfree (pi
->syscall_names
);
1001 pi
->syscall_names
= 0;
1005 /* Function: find_syscall
1007 Given a name, look up (and return) the corresponding syscall number.
1008 If no match is found, return -1. */
1011 find_syscall (procinfo
*pi
, char *name
)
1014 for (i
= 0; i
< pi
->num_syscalls
; i
++)
1016 if (pi
->syscall_names
[i
] && strcmp (name
, pi
->syscall_names
[i
]) == 0)
1023 /* =================== END, STRUCT PROCINFO "MODULE" =================== */
1025 /* =================== /proc "MODULE" =================== */
1028 * This "module" is the interface layer between the /proc system API
1029 * and the gdb target vector functions. This layer consists of
1030 * access functions that encapsulate each of the basic operations
1031 * that we need to use from the /proc API.
1033 * The main motivation for this layer is to hide the fact that
1034 * there are two very different implementations of the /proc API.
1035 * Rather than have a bunch of #ifdefs all thru the gdb target vector
1036 * functions, we do our best to hide them all in here.
1039 int proc_get_status (procinfo
* pi
);
1040 long proc_flags (procinfo
* pi
);
1041 int proc_why (procinfo
* pi
);
1042 int proc_what (procinfo
* pi
);
1043 int proc_set_run_on_last_close (procinfo
* pi
);
1044 int proc_unset_run_on_last_close (procinfo
* pi
);
1045 int proc_set_inherit_on_fork (procinfo
* pi
);
1046 int proc_unset_inherit_on_fork (procinfo
* pi
);
1047 int proc_set_async (procinfo
* pi
);
1048 int proc_unset_async (procinfo
* pi
);
1049 int proc_stop_process (procinfo
* pi
);
1050 int proc_trace_signal (procinfo
* pi
, int signo
);
1051 int proc_ignore_signal (procinfo
* pi
, int signo
);
1052 int proc_clear_current_fault (procinfo
* pi
);
1053 int proc_set_current_signal (procinfo
* pi
, int signo
);
1054 int proc_clear_current_signal (procinfo
* pi
);
1055 int proc_set_gregs (procinfo
* pi
);
1056 int proc_set_fpregs (procinfo
* pi
);
1057 int proc_wait_for_stop (procinfo
* pi
);
1058 int proc_run_process (procinfo
* pi
, int step
, int signo
);
1059 int proc_kill (procinfo
* pi
, int signo
);
1060 int proc_parent_pid (procinfo
* pi
);
1061 int proc_get_nthreads (procinfo
* pi
);
1062 int proc_get_current_thread (procinfo
* pi
);
1063 int proc_set_held_signals (procinfo
* pi
, gdb_sigset_t
* sighold
);
1064 int proc_set_traced_sysexit (procinfo
* pi
, sysset_t
* sysset
);
1065 int proc_set_traced_sysentry (procinfo
* pi
, sysset_t
* sysset
);
1066 int proc_set_traced_faults (procinfo
* pi
, fltset_t
* fltset
);
1067 int proc_set_traced_signals (procinfo
* pi
, gdb_sigset_t
* sigset
);
1069 int proc_update_threads (procinfo
* pi
);
1070 int proc_iterate_over_threads (procinfo
* pi
,
1071 int (*func
) (procinfo
*, procinfo
*, void *),
1074 gdb_gregset_t
*proc_get_gregs (procinfo
* pi
);
1075 gdb_fpregset_t
*proc_get_fpregs (procinfo
* pi
);
1076 sysset_t
*proc_get_traced_sysexit (procinfo
* pi
, sysset_t
* save
);
1077 sysset_t
*proc_get_traced_sysentry (procinfo
* pi
, sysset_t
* save
);
1078 fltset_t
*proc_get_traced_faults (procinfo
* pi
, fltset_t
* save
);
1079 gdb_sigset_t
*proc_get_traced_signals (procinfo
* pi
, gdb_sigset_t
* save
);
1080 gdb_sigset_t
*proc_get_held_signals (procinfo
* pi
, gdb_sigset_t
* save
);
1081 gdb_sigset_t
*proc_get_pending_signals (procinfo
* pi
, gdb_sigset_t
* save
);
1082 gdb_sigaction_t
*proc_get_signal_actions (procinfo
* pi
, gdb_sigaction_t
*save
);
1084 void proc_warn (procinfo
* pi
, char *func
, int line
);
1085 void proc_error (procinfo
* pi
, char *func
, int line
);
1088 proc_warn (procinfo
*pi
, char *func
, int line
)
1090 sprintf (errmsg
, "procfs: %s line %d, %s", func
, line
, pi
->pathname
);
1091 print_sys_errmsg (errmsg
, errno
);
1095 proc_error (procinfo
*pi
, char *func
, int line
)
1097 sprintf (errmsg
, "procfs: %s line %d, %s", func
, line
, pi
->pathname
);
1098 perror_with_name (errmsg
);
1102 * Function: proc_get_status
1104 * Updates the status struct in the procinfo.
1105 * There is a 'valid' flag, to let other functions know when
1106 * this function needs to be called (so the status is only
1107 * read when it is needed). The status file descriptor is
1108 * also only opened when it is needed.
1110 * Return: non-zero for success, zero for failure.
1114 proc_get_status (procinfo
*pi
)
1116 /* Status file descriptor is opened "lazily" */
1117 if (pi
->status_fd
== 0 &&
1118 open_procinfo_files (pi
, FD_STATUS
) == 0)
1120 pi
->status_valid
= 0;
1125 if (lseek (pi
->status_fd
, 0, SEEK_SET
) < 0)
1126 pi
->status_valid
= 0; /* fail */
1129 /* Sigh... I have to read a different data structure,
1130 depending on whether this is a main process or an LWP. */
1132 pi
->status_valid
= (read (pi
->status_fd
,
1133 (char *) &pi
->prstatus
.pr_lwp
,
1134 sizeof (lwpstatus_t
))
1135 == sizeof (lwpstatus_t
));
1138 pi
->status_valid
= (read (pi
->status_fd
,
1139 (char *) &pi
->prstatus
,
1140 sizeof (gdb_prstatus_t
))
1141 == sizeof (gdb_prstatus_t
));
1142 #if 0 /*def UNIXWARE*/
1143 if (pi
->status_valid
&&
1144 (pi
->prstatus
.pr_lwp
.pr_flags
& PR_ISTOP
) &&
1145 pi
->prstatus
.pr_lwp
.pr_why
== PR_REQUESTED
)
1146 /* Unixware peculiarity -- read the damn thing again! */
1147 pi
->status_valid
= (read (pi
->status_fd
,
1148 (char *) &pi
->prstatus
,
1149 sizeof (gdb_prstatus_t
))
1150 == sizeof (gdb_prstatus_t
));
1151 #endif /* UNIXWARE */
1154 #else /* ioctl method */
1155 #ifdef PIOCTSTATUS /* osf */
1156 if (pi
->tid
== 0) /* main process */
1158 /* Just read the danged status. Now isn't that simple? */
1160 (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) >= 0);
1167 tid_t pr_error_thread
;
1168 struct prstatus status
;
1171 thread_status
.pr_count
= 1;
1172 thread_status
.status
.pr_tid
= pi
->tid
;
1173 win
= (ioctl (pi
->status_fd
, PIOCTSTATUS
, &thread_status
) >= 0);
1176 memcpy (&pi
->prstatus
, &thread_status
.status
,
1177 sizeof (pi
->prstatus
));
1178 pi
->status_valid
= 1;
1182 /* Just read the danged status. Now isn't that simple? */
1183 pi
->status_valid
= (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) >= 0);
1187 if (pi
->status_valid
)
1189 PROC_PRETTYFPRINT_STATUS (proc_flags (pi
),
1192 proc_get_current_thread (pi
));
1195 /* The status struct includes general regs, so mark them valid too */
1196 pi
->gregs_valid
= pi
->status_valid
;
1198 /* In the read/write multiple-fd model,
1199 the status struct includes the fp regs too, so mark them valid too */
1200 pi
->fpregs_valid
= pi
->status_valid
;
1202 return pi
->status_valid
; /* True if success, false if failure. */
1206 * Function: proc_flags
1208 * returns the process flags (pr_flags field).
1212 proc_flags (procinfo
*pi
)
1214 if (!pi
->status_valid
)
1215 if (!proc_get_status (pi
))
1216 return 0; /* FIXME: not a good failure value (but what is?) */
1220 /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in
1221 pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t.
1222 The two sets of flags don't overlap. */
1223 return pi
->prstatus
.pr_flags
| pi
->prstatus
.pr_lwp
.pr_flags
;
1225 return pi
->prstatus
.pr_lwp
.pr_flags
;
1228 return pi
->prstatus
.pr_flags
;
1233 * Function: proc_why
1235 * returns the pr_why field (why the process stopped).
1239 proc_why (procinfo
*pi
)
1241 if (!pi
->status_valid
)
1242 if (!proc_get_status (pi
))
1243 return 0; /* FIXME: not a good failure value (but what is?) */
1246 return pi
->prstatus
.pr_lwp
.pr_why
;
1248 return pi
->prstatus
.pr_why
;
1253 * Function: proc_what
1255 * returns the pr_what field (details of why the process stopped).
1259 proc_what (procinfo
*pi
)
1261 if (!pi
->status_valid
)
1262 if (!proc_get_status (pi
))
1263 return 0; /* FIXME: not a good failure value (but what is?) */
1266 return pi
->prstatus
.pr_lwp
.pr_what
;
1268 return pi
->prstatus
.pr_what
;
1272 #ifndef PIOCSSPCACT /* The following is not supported on OSF. */
1274 * Function: proc_nsysarg
1276 * returns the pr_nsysarg field (number of args to the current syscall).
1280 proc_nsysarg (procinfo
*pi
)
1282 if (!pi
->status_valid
)
1283 if (!proc_get_status (pi
))
1287 return pi
->prstatus
.pr_lwp
.pr_nsysarg
;
1289 return pi
->prstatus
.pr_nsysarg
;
1294 * Function: proc_sysargs
1296 * returns the pr_sysarg field (pointer to the arguments of current syscall).
1300 proc_sysargs (procinfo
*pi
)
1302 if (!pi
->status_valid
)
1303 if (!proc_get_status (pi
))
1307 return (long *) &pi
->prstatus
.pr_lwp
.pr_sysarg
;
1309 return (long *) &pi
->prstatus
.pr_sysarg
;
1314 * Function: proc_syscall
1316 * returns the pr_syscall field (id of current syscall if we are in one).
1320 proc_syscall (procinfo
*pi
)
1322 if (!pi
->status_valid
)
1323 if (!proc_get_status (pi
))
1327 return pi
->prstatus
.pr_lwp
.pr_syscall
;
1329 return pi
->prstatus
.pr_syscall
;
1332 #endif /* PIOCSSPCACT */
1335 * Function: proc_cursig:
1337 * returns the pr_cursig field (current signal).
1341 proc_cursig (struct procinfo
*pi
)
1343 if (!pi
->status_valid
)
1344 if (!proc_get_status (pi
))
1345 return 0; /* FIXME: not a good failure value (but what is?) */
1348 return pi
->prstatus
.pr_lwp
.pr_cursig
;
1350 return pi
->prstatus
.pr_cursig
;
1355 * Function: proc_modify_flag
1357 * === I appologize for the messiness of this function.
1358 * === This is an area where the different versions of
1359 * === /proc are more inconsistent than usual. MVS
1361 * Set or reset any of the following process flags:
1362 * PR_FORK -- forked child will inherit trace flags
1363 * PR_RLC -- traced process runs when last /proc file closed.
1364 * PR_KLC -- traced process is killed when last /proc file closed.
1365 * PR_ASYNC -- LWP's get to run/stop independently.
1367 * There are three methods for doing this function:
1368 * 1) Newest: read/write [PCSET/PCRESET/PCUNSET]
1370 * 2) Middle: PIOCSET/PIOCRESET
1372 * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC
1375 * Note: Irix does not define PR_ASYNC.
1376 * Note: OSF does not define PR_KLC.
1377 * Note: OSF is the only one that can ONLY use the oldest method.
1380 * pi -- the procinfo
1381 * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC
1382 * mode -- 1 for set, 0 for reset.
1384 * Returns non-zero for success, zero for failure.
1387 enum { FLAG_RESET
, FLAG_SET
};
1390 proc_modify_flag (procinfo
*pi
, long flag
, long mode
)
1392 long win
= 0; /* default to fail */
1395 * These operations affect the process as a whole, and applying
1396 * them to an individual LWP has the same meaning as applying them
1397 * to the main process. Therefore, if we're ever called with a
1398 * pointer to an LWP's procinfo, let's substitute the process's
1399 * procinfo and avoid opening the LWP's file descriptor
1404 pi
= find_procinfo_or_die (pi
->pid
, 0);
1406 #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */
1407 /* First normalize the PCUNSET/PCRESET command opcode
1408 (which for no obvious reason has a different definition
1409 from one operating system to the next...) */
1411 #define GDBRESET PCUNSET
1414 #define GDBRESET PCRESET
1418 procfs_ctl_t arg
[2];
1420 if (mode
== FLAG_SET
) /* Set the flag (RLC, FORK, or ASYNC) */
1422 else /* Reset the flag */
1426 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
1429 #ifdef PIOCSET /* Irix/Sol5 method */
1430 if (mode
== FLAG_SET
) /* Set the flag (hopefully RLC, FORK, or ASYNC) */
1432 win
= (ioctl (pi
->ctl_fd
, PIOCSET
, &flag
) >= 0);
1434 else /* Reset the flag */
1436 win
= (ioctl (pi
->ctl_fd
, PIOCRESET
, &flag
) >= 0);
1440 #ifdef PIOCSRLC /* Oldest method: OSF */
1443 if (mode
== FLAG_SET
) /* Set run-on-last-close */
1445 win
= (ioctl (pi
->ctl_fd
, PIOCSRLC
, NULL
) >= 0);
1447 else /* Clear run-on-last-close */
1449 win
= (ioctl (pi
->ctl_fd
, PIOCRRLC
, NULL
) >= 0);
1453 if (mode
== FLAG_SET
) /* Set inherit-on-fork */
1455 win
= (ioctl (pi
->ctl_fd
, PIOCSFORK
, NULL
) >= 0);
1457 else /* Clear inherit-on-fork */
1459 win
= (ioctl (pi
->ctl_fd
, PIOCRFORK
, NULL
) >= 0);
1463 win
= 0; /* fail -- unknown flag (can't do PR_ASYNC) */
1470 /* The above operation renders the procinfo's cached pstatus obsolete. */
1471 pi
->status_valid
= 0;
1474 warning ("procfs: modify_flag failed to turn %s %s",
1475 flag
== PR_FORK
? "PR_FORK" :
1476 flag
== PR_RLC
? "PR_RLC" :
1478 flag
== PR_ASYNC
? "PR_ASYNC" :
1481 flag
== PR_KLC
? "PR_KLC" :
1484 mode
== FLAG_RESET
? "off" : "on");
1490 * Function: proc_set_run_on_last_close
1492 * Set the run_on_last_close flag.
1493 * Process with all threads will become runnable
1494 * when debugger closes all /proc fds.
1496 * Returns non-zero for success, zero for failure.
1500 proc_set_run_on_last_close (procinfo
*pi
)
1502 return proc_modify_flag (pi
, PR_RLC
, FLAG_SET
);
1506 * Function: proc_unset_run_on_last_close
1508 * Reset the run_on_last_close flag.
1509 * Process will NOT become runnable
1510 * when debugger closes its file handles.
1512 * Returns non-zero for success, zero for failure.
1516 proc_unset_run_on_last_close (procinfo
*pi
)
1518 return proc_modify_flag (pi
, PR_RLC
, FLAG_RESET
);
1523 * Function: proc_set_kill_on_last_close
1525 * Set the kill_on_last_close flag.
1526 * Process with all threads will be killed when debugger
1527 * closes all /proc fds (or debugger exits or dies).
1529 * Returns non-zero for success, zero for failure.
1533 proc_set_kill_on_last_close (procinfo
*pi
)
1535 return proc_modify_flag (pi
, PR_KLC
, FLAG_SET
);
1539 * Function: proc_unset_kill_on_last_close
1541 * Reset the kill_on_last_close flag.
1542 * Process will NOT be killed when debugger
1543 * closes its file handles (or exits or dies).
1545 * Returns non-zero for success, zero for failure.
1549 proc_unset_kill_on_last_close (procinfo
*pi
)
1551 return proc_modify_flag (pi
, PR_KLC
, FLAG_RESET
);
1556 * Function: proc_set_inherit_on_fork
1558 * Set inherit_on_fork flag.
1559 * If the process forks a child while we are registered for events
1560 * in the parent, then we will also recieve events from the child.
1562 * Returns non-zero for success, zero for failure.
1566 proc_set_inherit_on_fork (procinfo
*pi
)
1568 return proc_modify_flag (pi
, PR_FORK
, FLAG_SET
);
1572 * Function: proc_unset_inherit_on_fork
1574 * Reset inherit_on_fork flag.
1575 * If the process forks a child while we are registered for events
1576 * in the parent, then we will NOT recieve events from the child.
1578 * Returns non-zero for success, zero for failure.
1582 proc_unset_inherit_on_fork (procinfo
*pi
)
1584 return proc_modify_flag (pi
, PR_FORK
, FLAG_RESET
);
1589 * Function: proc_set_async
1591 * Set PR_ASYNC flag.
1592 * If one LWP stops because of a debug event (signal etc.),
1593 * the remaining LWPs will continue to run.
1595 * Returns non-zero for success, zero for failure.
1599 proc_set_async (procinfo
*pi
)
1601 return proc_modify_flag (pi
, PR_ASYNC
, FLAG_SET
);
1605 * Function: proc_unset_async
1607 * Reset PR_ASYNC flag.
1608 * If one LWP stops because of a debug event (signal etc.),
1609 * then all other LWPs will stop as well.
1611 * Returns non-zero for success, zero for failure.
1615 proc_unset_async (procinfo
*pi
)
1617 return proc_modify_flag (pi
, PR_ASYNC
, FLAG_RESET
);
1619 #endif /* PR_ASYNC */
1622 * Function: proc_stop_process
1624 * Request the process/LWP to stop. Does not wait.
1625 * Returns non-zero for success, zero for failure.
1629 proc_stop_process (procinfo
*pi
)
1634 * We might conceivably apply this operation to an LWP, and
1635 * the LWP's ctl file descriptor might not be open.
1638 if (pi
->ctl_fd
== 0 &&
1639 open_procinfo_files (pi
, FD_CTL
) == 0)
1644 procfs_ctl_t cmd
= PCSTOP
;
1645 win
= (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
1646 #else /* ioctl method */
1647 win
= (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) >= 0);
1648 /* Note: the call also reads the prstatus. */
1651 pi
->status_valid
= 1;
1652 PROC_PRETTYFPRINT_STATUS (proc_flags (pi
),
1655 proc_get_current_thread (pi
));
1664 * Function: proc_wait_for_stop
1666 * Wait for the process or LWP to stop (block until it does).
1667 * Returns non-zero for success, zero for failure.
1671 proc_wait_for_stop (procinfo
*pi
)
1676 * We should never have to apply this operation to any procinfo
1677 * except the one for the main process. If that ever changes
1678 * for any reason, then take out the following clause and
1679 * replace it with one that makes sure the ctl_fd is open.
1683 pi
= find_procinfo_or_die (pi
->pid
, 0);
1687 procfs_ctl_t cmd
= PCWSTOP
;
1688 win
= (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
1689 /* We been runnin' and we stopped -- need to update status. */
1690 pi
->status_valid
= 0;
1692 #else /* ioctl method */
1693 win
= (ioctl (pi
->ctl_fd
, PIOCWSTOP
, &pi
->prstatus
) >= 0);
1694 /* Above call also refreshes the prstatus. */
1697 pi
->status_valid
= 1;
1698 PROC_PRETTYFPRINT_STATUS (proc_flags (pi
),
1701 proc_get_current_thread (pi
));
1709 * Function: proc_run_process
1711 * Make the process or LWP runnable.
1712 * Options (not all are implemented):
1714 * - clear current fault
1715 * - clear current signal
1716 * - abort the current system call
1717 * - stop as soon as finished with system call
1718 * - (ioctl): set traced signal set
1719 * - (ioctl): set held signal set
1720 * - (ioctl): set traced fault set
1721 * - (ioctl): set start pc (vaddr)
1722 * Always clear the current fault.
1723 * Clear the current signal if 'signo' is zero.
1726 * pi the process or LWP to operate on.
1727 * step if true, set the process or LWP to trap after one instr.
1728 * signo if zero, clear the current signal if any.
1729 * if non-zero, set the current signal to this one.
1731 * Returns non-zero for success, zero for failure.
1735 proc_run_process (procinfo
*pi
, int step
, int signo
)
1741 * We will probably have to apply this operation to individual threads,
1742 * so make sure the control file descriptor is open.
1745 if (pi
->ctl_fd
== 0 &&
1746 open_procinfo_files (pi
, FD_CTL
) == 0)
1751 runflags
= PRCFAULT
; /* always clear current fault */
1756 else if (signo
!= -1) /* -1 means do nothing W.R.T. signals */
1757 proc_set_current_signal (pi
, signo
);
1761 procfs_ctl_t cmd
[2];
1765 win
= (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
1767 #else /* ioctl method */
1771 memset (&prrun
, 0, sizeof (prrun
));
1772 prrun
.pr_flags
= runflags
;
1773 win
= (ioctl (pi
->ctl_fd
, PIOCRUN
, &prrun
) >= 0);
1781 * Function: proc_set_traced_signals
1783 * Register to trace signals in the process or LWP.
1784 * Returns non-zero for success, zero for failure.
1788 proc_set_traced_signals (procinfo
*pi
, gdb_sigset_t
*sigset
)
1793 * We should never have to apply this operation to any procinfo
1794 * except the one for the main process. If that ever changes
1795 * for any reason, then take out the following clause and
1796 * replace it with one that makes sure the ctl_fd is open.
1800 pi
= find_procinfo_or_die (pi
->pid
, 0);
1806 /* Use char array to avoid alignment issues. */
1807 char sigset
[sizeof (gdb_sigset_t
)];
1811 memcpy (&arg
.sigset
, sigset
, sizeof (gdb_sigset_t
));
1813 win
= (write (pi
->ctl_fd
, (char *) &arg
, sizeof (arg
)) == sizeof (arg
));
1815 #else /* ioctl method */
1816 win
= (ioctl (pi
->ctl_fd
, PIOCSTRACE
, sigset
) >= 0);
1818 /* The above operation renders the procinfo's cached pstatus obsolete. */
1819 pi
->status_valid
= 0;
1822 warning ("procfs: set_traced_signals failed");
1827 * Function: proc_set_traced_faults
1829 * Register to trace hardware faults in the process or LWP.
1830 * Returns non-zero for success, zero for failure.
1834 proc_set_traced_faults (procinfo
*pi
, fltset_t
*fltset
)
1839 * We should never have to apply this operation to any procinfo
1840 * except the one for the main process. If that ever changes
1841 * for any reason, then take out the following clause and
1842 * replace it with one that makes sure the ctl_fd is open.
1846 pi
= find_procinfo_or_die (pi
->pid
, 0);
1852 /* Use char array to avoid alignment issues. */
1853 char fltset
[sizeof (fltset_t
)];
1857 memcpy (&arg
.fltset
, fltset
, sizeof (fltset_t
));
1859 win
= (write (pi
->ctl_fd
, (char *) &arg
, sizeof (arg
)) == sizeof (arg
));
1861 #else /* ioctl method */
1862 win
= (ioctl (pi
->ctl_fd
, PIOCSFAULT
, fltset
) >= 0);
1864 /* The above operation renders the procinfo's cached pstatus obsolete. */
1865 pi
->status_valid
= 0;
1871 * Function: proc_set_traced_sysentry
1873 * Register to trace entry to system calls in the process or LWP.
1874 * Returns non-zero for success, zero for failure.
1878 proc_set_traced_sysentry (procinfo
*pi
, sysset_t
*sysset
)
1883 * We should never have to apply this operation to any procinfo
1884 * except the one for the main process. If that ever changes
1885 * for any reason, then take out the following clause and
1886 * replace it with one that makes sure the ctl_fd is open.
1890 pi
= find_procinfo_or_die (pi
->pid
, 0);
1894 struct gdb_proc_ctl_pcsentry
{
1896 /* Use char array to avoid alignment issues. */
1897 char sysset
[sizeof (sysset_t
)];
1899 int argp_size
= sizeof (struct gdb_proc_ctl_pcsentry
)
1901 + sysset_t_size (pi
);
1903 argp
= xmalloc (argp_size
);
1905 argp
->cmd
= PCSENTRY
;
1906 memcpy (&argp
->sysset
, sysset
, sysset_t_size (pi
));
1908 win
= (write (pi
->ctl_fd
, (char *) argp
, argp_size
) == argp_size
);
1911 #else /* ioctl method */
1912 win
= (ioctl (pi
->ctl_fd
, PIOCSENTRY
, sysset
) >= 0);
1914 /* The above operation renders the procinfo's cached pstatus obsolete. */
1915 pi
->status_valid
= 0;
1921 * Function: proc_set_traced_sysexit
1923 * Register to trace exit from system calls in the process or LWP.
1924 * Returns non-zero for success, zero for failure.
1928 proc_set_traced_sysexit (procinfo
*pi
, sysset_t
*sysset
)
1933 * We should never have to apply this operation to any procinfo
1934 * except the one for the main process. If that ever changes
1935 * for any reason, then take out the following clause and
1936 * replace it with one that makes sure the ctl_fd is open.
1940 pi
= find_procinfo_or_die (pi
->pid
, 0);
1944 struct gdb_proc_ctl_pcsexit
{
1946 /* Use char array to avoid alignment issues. */
1947 char sysset
[sizeof (sysset_t
)];
1949 int argp_size
= sizeof (struct gdb_proc_ctl_pcsexit
)
1951 + sysset_t_size (pi
);
1953 argp
= xmalloc (argp_size
);
1955 argp
->cmd
= PCSEXIT
;
1956 memcpy (&argp
->sysset
, sysset
, sysset_t_size (pi
));
1958 win
= (write (pi
->ctl_fd
, (char *) argp
, argp_size
) == argp_size
);
1961 #else /* ioctl method */
1962 win
= (ioctl (pi
->ctl_fd
, PIOCSEXIT
, sysset
) >= 0);
1964 /* The above operation renders the procinfo's cached pstatus obsolete. */
1965 pi
->status_valid
= 0;
1971 * Function: proc_set_held_signals
1973 * Specify the set of blocked / held signals in the process or LWP.
1974 * Returns non-zero for success, zero for failure.
1978 proc_set_held_signals (procinfo
*pi
, gdb_sigset_t
*sighold
)
1983 * We should never have to apply this operation to any procinfo
1984 * except the one for the main process. If that ever changes
1985 * for any reason, then take out the following clause and
1986 * replace it with one that makes sure the ctl_fd is open.
1990 pi
= find_procinfo_or_die (pi
->pid
, 0);
1996 /* Use char array to avoid alignment issues. */
1997 char hold
[sizeof (gdb_sigset_t
)];
2001 memcpy (&arg
.hold
, sighold
, sizeof (gdb_sigset_t
));
2002 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2005 win
= (ioctl (pi
->ctl_fd
, PIOCSHOLD
, sighold
) >= 0);
2007 /* The above operation renders the procinfo's cached pstatus obsolete. */
2008 pi
->status_valid
= 0;
2014 * Function: proc_get_pending_signals
2016 * returns the set of signals that are pending in the process or LWP.
2017 * Will also copy the sigset if 'save' is non-zero.
2021 proc_get_pending_signals (procinfo
*pi
, gdb_sigset_t
*save
)
2023 gdb_sigset_t
*ret
= NULL
;
2026 * We should never have to apply this operation to any procinfo
2027 * except the one for the main process. If that ever changes
2028 * for any reason, then take out the following clause and
2029 * replace it with one that makes sure the ctl_fd is open.
2033 pi
= find_procinfo_or_die (pi
->pid
, 0);
2035 if (!pi
->status_valid
)
2036 if (!proc_get_status (pi
))
2040 ret
= &pi
->prstatus
.pr_lwp
.pr_lwppend
;
2042 ret
= &pi
->prstatus
.pr_sigpend
;
2045 memcpy (save
, ret
, sizeof (gdb_sigset_t
));
2051 * Function: proc_get_signal_actions
2053 * returns the set of signal actions.
2054 * Will also copy the sigactionset if 'save' is non-zero.
2058 proc_get_signal_actions (procinfo
*pi
, gdb_sigaction_t
*save
)
2060 gdb_sigaction_t
*ret
= NULL
;
2063 * We should never have to apply this operation to any procinfo
2064 * except the one for the main process. If that ever changes
2065 * for any reason, then take out the following clause and
2066 * replace it with one that makes sure the ctl_fd is open.
2070 pi
= find_procinfo_or_die (pi
->pid
, 0);
2072 if (!pi
->status_valid
)
2073 if (!proc_get_status (pi
))
2077 ret
= &pi
->prstatus
.pr_lwp
.pr_action
;
2079 ret
= &pi
->prstatus
.pr_action
;
2082 memcpy (save
, ret
, sizeof (gdb_sigaction_t
));
2088 * Function: proc_get_held_signals
2090 * returns the set of signals that are held / blocked.
2091 * Will also copy the sigset if 'save' is non-zero.
2095 proc_get_held_signals (procinfo
*pi
, gdb_sigset_t
*save
)
2097 gdb_sigset_t
*ret
= NULL
;
2100 * We should never have to apply this operation to any procinfo
2101 * except the one for the main process. If that ever changes
2102 * for any reason, then take out the following clause and
2103 * replace it with one that makes sure the ctl_fd is open.
2107 pi
= find_procinfo_or_die (pi
->pid
, 0);
2110 if (!pi
->status_valid
)
2111 if (!proc_get_status (pi
))
2115 ret
= &pi
->prstatus
.pr_lwp
.pr_context
.uc_sigmask
;
2117 ret
= &pi
->prstatus
.pr_lwp
.pr_lwphold
;
2118 #endif /* UNIXWARE */
2119 #else /* not NEW_PROC_API */
2121 static gdb_sigset_t sigheld
;
2123 if (ioctl (pi
->ctl_fd
, PIOCGHOLD
, &sigheld
) >= 0)
2126 #endif /* NEW_PROC_API */
2128 memcpy (save
, ret
, sizeof (gdb_sigset_t
));
2134 * Function: proc_get_traced_signals
2136 * returns the set of signals that are traced / debugged.
2137 * Will also copy the sigset if 'save' is non-zero.
2141 proc_get_traced_signals (procinfo
*pi
, gdb_sigset_t
*save
)
2143 gdb_sigset_t
*ret
= NULL
;
2146 * We should never have to apply this operation to any procinfo
2147 * except the one for the main process. If that ever changes
2148 * for any reason, then take out the following clause and
2149 * replace it with one that makes sure the ctl_fd is open.
2153 pi
= find_procinfo_or_die (pi
->pid
, 0);
2156 if (!pi
->status_valid
)
2157 if (!proc_get_status (pi
))
2160 ret
= &pi
->prstatus
.pr_sigtrace
;
2163 static gdb_sigset_t sigtrace
;
2165 if (ioctl (pi
->ctl_fd
, PIOCGTRACE
, &sigtrace
) >= 0)
2170 memcpy (save
, ret
, sizeof (gdb_sigset_t
));
2176 * Function: proc_trace_signal
2178 * Add 'signo' to the set of signals that are traced.
2179 * Returns non-zero for success, zero for failure.
2183 proc_trace_signal (procinfo
*pi
, int signo
)
2188 * We should never have to apply this operation to any procinfo
2189 * except the one for the main process. If that ever changes
2190 * for any reason, then take out the following clause and
2191 * replace it with one that makes sure the ctl_fd is open.
2195 pi
= find_procinfo_or_die (pi
->pid
, 0);
2199 if (proc_get_traced_signals (pi
, &temp
))
2201 praddset (&temp
, signo
);
2202 return proc_set_traced_signals (pi
, &temp
);
2206 return 0; /* failure */
2210 * Function: proc_ignore_signal
2212 * Remove 'signo' from the set of signals that are traced.
2213 * Returns non-zero for success, zero for failure.
2217 proc_ignore_signal (procinfo
*pi
, int signo
)
2222 * We should never have to apply this operation to any procinfo
2223 * except the one for the main process. If that ever changes
2224 * for any reason, then take out the following clause and
2225 * replace it with one that makes sure the ctl_fd is open.
2229 pi
= find_procinfo_or_die (pi
->pid
, 0);
2233 if (proc_get_traced_signals (pi
, &temp
))
2235 prdelset (&temp
, signo
);
2236 return proc_set_traced_signals (pi
, &temp
);
2240 return 0; /* failure */
2244 * Function: proc_get_traced_faults
2246 * returns the set of hardware faults that are traced /debugged.
2247 * Will also copy the faultset if 'save' is non-zero.
2251 proc_get_traced_faults (procinfo
*pi
, fltset_t
*save
)
2253 fltset_t
*ret
= NULL
;
2256 * We should never have to apply this operation to any procinfo
2257 * except the one for the main process. If that ever changes
2258 * for any reason, then take out the following clause and
2259 * replace it with one that makes sure the ctl_fd is open.
2263 pi
= find_procinfo_or_die (pi
->pid
, 0);
2266 if (!pi
->status_valid
)
2267 if (!proc_get_status (pi
))
2270 ret
= &pi
->prstatus
.pr_flttrace
;
2273 static fltset_t flttrace
;
2275 if (ioctl (pi
->ctl_fd
, PIOCGFAULT
, &flttrace
) >= 0)
2280 memcpy (save
, ret
, sizeof (fltset_t
));
2286 * Function: proc_get_traced_sysentry
2288 * returns the set of syscalls that are traced /debugged on entry.
2289 * Will also copy the syscall set if 'save' is non-zero.
2293 proc_get_traced_sysentry (procinfo
*pi
, sysset_t
*save
)
2295 sysset_t
*ret
= NULL
;
2298 * We should never have to apply this operation to any procinfo
2299 * except the one for the main process. If that ever changes
2300 * for any reason, then take out the following clause and
2301 * replace it with one that makes sure the ctl_fd is open.
2305 pi
= find_procinfo_or_die (pi
->pid
, 0);
2308 if (!pi
->status_valid
)
2309 if (!proc_get_status (pi
))
2312 #ifndef DYNAMIC_SYSCALLS
2313 ret
= &pi
->prstatus
.pr_sysentry
;
2314 #else /* DYNAMIC_SYSCALLS */
2316 static sysset_t
*sysentry
;
2320 sysentry
= sysset_t_alloc (pi
);
2322 if (pi
->status_fd
== 0 && open_procinfo_files (pi
, FD_STATUS
) == 0)
2324 if (pi
->prstatus
.pr_sysentry_offset
== 0)
2326 gdb_premptysysset (sysentry
);
2332 if (lseek (pi
->status_fd
, (off_t
) pi
->prstatus
.pr_sysentry_offset
,
2334 != (off_t
) pi
->prstatus
.pr_sysentry_offset
)
2336 size
= sysset_t_size (pi
);
2337 gdb_premptysysset (sysentry
);
2338 rsize
= read (pi
->status_fd
, sysentry
, size
);
2343 #endif /* DYNAMIC_SYSCALLS */
2344 #else /* !NEW_PROC_API */
2346 static sysset_t sysentry
;
2348 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysentry
) >= 0)
2351 #endif /* NEW_PROC_API */
2353 memcpy (save
, ret
, sysset_t_size (pi
));
2359 * Function: proc_get_traced_sysexit
2361 * returns the set of syscalls that are traced /debugged on exit.
2362 * Will also copy the syscall set if 'save' is non-zero.
2366 proc_get_traced_sysexit (procinfo
*pi
, sysset_t
*save
)
2368 sysset_t
* ret
= NULL
;
2371 * We should never have to apply this operation to any procinfo
2372 * except the one for the main process. If that ever changes
2373 * for any reason, then take out the following clause and
2374 * replace it with one that makes sure the ctl_fd is open.
2378 pi
= find_procinfo_or_die (pi
->pid
, 0);
2381 if (!pi
->status_valid
)
2382 if (!proc_get_status (pi
))
2385 #ifndef DYNAMIC_SYSCALLS
2386 ret
= &pi
->prstatus
.pr_sysexit
;
2387 #else /* DYNAMIC_SYSCALLS */
2389 static sysset_t
*sysexit
;
2393 sysexit
= sysset_t_alloc (pi
);
2395 if (pi
->status_fd
== 0 && open_procinfo_files (pi
, FD_STATUS
) == 0)
2397 if (pi
->prstatus
.pr_sysexit_offset
== 0)
2399 gdb_premptysysset (sysexit
);
2405 if (lseek (pi
->status_fd
, (off_t
) pi
->prstatus
.pr_sysexit_offset
, SEEK_SET
)
2406 != (off_t
) pi
->prstatus
.pr_sysexit_offset
)
2408 size
= sysset_t_size (pi
);
2409 gdb_premptysysset (sysexit
);
2410 rsize
= read (pi
->status_fd
, sysexit
, size
);
2415 #endif /* DYNAMIC_SYSCALLS */
2418 static sysset_t sysexit
;
2420 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysexit
) >= 0)
2425 memcpy (save
, ret
, sysset_t_size (pi
));
2431 * Function: proc_clear_current_fault
2433 * The current fault (if any) is cleared; the associated signal
2434 * will not be sent to the process or LWP when it resumes.
2435 * Returns non-zero for success, zero for failure.
2439 proc_clear_current_fault (procinfo
*pi
)
2444 * We should never have to apply this operation to any procinfo
2445 * except the one for the main process. If that ever changes
2446 * for any reason, then take out the following clause and
2447 * replace it with one that makes sure the ctl_fd is open.
2451 pi
= find_procinfo_or_die (pi
->pid
, 0);
2455 procfs_ctl_t cmd
= PCCFAULT
;
2456 win
= (write (pi
->ctl_fd
, (void *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
2459 win
= (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0) >= 0);
2466 * Function: proc_set_current_signal
2468 * Set the "current signal" that will be delivered next to the process.
2469 * NOTE: semantics are different from those of KILL.
2470 * This signal will be delivered to the process or LWP
2471 * immediately when it is resumed (even if the signal is held/blocked);
2472 * it will NOT immediately cause another event of interest, and will NOT
2473 * first trap back to the debugger.
2475 * Returns non-zero for success, zero for failure.
2479 proc_set_current_signal (procinfo
*pi
, int signo
)
2484 /* Use char array to avoid alignment issues. */
2485 char sinfo
[sizeof (gdb_siginfo_t
)];
2487 gdb_siginfo_t
*mysinfo
;
2490 * We should never have to apply this operation to any procinfo
2491 * except the one for the main process. If that ever changes
2492 * for any reason, then take out the following clause and
2493 * replace it with one that makes sure the ctl_fd is open.
2497 pi
= find_procinfo_or_die (pi
->pid
, 0);
2499 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
2500 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
2501 * receives a PIOCSSIG with a signal identical to the current signal,
2502 * it messes up the current signal. Work around the kernel bug.
2505 signo
== proc_cursig (pi
))
2506 return 1; /* I assume this is a success? */
2509 /* The pointer is just a type alias. */
2510 mysinfo
= (gdb_siginfo_t
*) &arg
.sinfo
;
2511 mysinfo
->si_signo
= signo
;
2512 mysinfo
->si_code
= 0;
2513 mysinfo
->si_pid
= getpid (); /* ?why? */
2514 mysinfo
->si_uid
= getuid (); /* ?why? */
2518 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2520 win
= (ioctl (pi
->ctl_fd
, PIOCSSIG
, (void *) &arg
.sinfo
) >= 0);
2527 * Function: proc_clear_current_signal
2529 * The current signal (if any) is cleared, and
2530 * is not sent to the process or LWP when it resumes.
2531 * Returns non-zero for success, zero for failure.
2535 proc_clear_current_signal (procinfo
*pi
)
2540 * We should never have to apply this operation to any procinfo
2541 * except the one for the main process. If that ever changes
2542 * for any reason, then take out the following clause and
2543 * replace it with one that makes sure the ctl_fd is open.
2547 pi
= find_procinfo_or_die (pi
->pid
, 0);
2553 /* Use char array to avoid alignment issues. */
2554 char sinfo
[sizeof (gdb_siginfo_t
)];
2556 gdb_siginfo_t
*mysinfo
;
2559 /* The pointer is just a type alias. */
2560 mysinfo
= (gdb_siginfo_t
*) &arg
.sinfo
;
2561 mysinfo
->si_signo
= 0;
2562 mysinfo
->si_code
= 0;
2563 mysinfo
->si_errno
= 0;
2564 mysinfo
->si_pid
= getpid (); /* ?why? */
2565 mysinfo
->si_uid
= getuid (); /* ?why? */
2567 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2570 win
= (ioctl (pi
->ctl_fd
, PIOCSSIG
, 0) >= 0);
2577 * Function: proc_get_gregs
2579 * Get the general registers for the process or LWP.
2580 * Returns non-zero for success, zero for failure.
2584 proc_get_gregs (procinfo
*pi
)
2586 if (!pi
->status_valid
|| !pi
->gregs_valid
)
2587 if (!proc_get_status (pi
))
2591 * OK, sorry about the ifdef's.
2592 * There's three cases instead of two, because
2593 * in this instance Unixware and Solaris/RW differ.
2597 #ifdef UNIXWARE /* ugh, a true architecture dependency */
2598 return &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.gregs
;
2599 #else /* not Unixware */
2600 return &pi
->prstatus
.pr_lwp
.pr_reg
;
2601 #endif /* Unixware */
2602 #else /* not NEW_PROC_API */
2603 return &pi
->prstatus
.pr_reg
;
2604 #endif /* NEW_PROC_API */
2608 * Function: proc_get_fpregs
2610 * Get the floating point registers for the process or LWP.
2611 * Returns non-zero for success, zero for failure.
2615 proc_get_fpregs (procinfo
*pi
)
2618 if (!pi
->status_valid
|| !pi
->fpregs_valid
)
2619 if (!proc_get_status (pi
))
2622 #ifdef UNIXWARE /* a true architecture dependency */
2623 return &pi
->prstatus
.pr_lwp
.pr_context
.uc_mcontext
.fpregs
;
2625 return &pi
->prstatus
.pr_lwp
.pr_fpreg
;
2626 #endif /* Unixware */
2628 #else /* not NEW_PROC_API */
2629 if (pi
->fpregs_valid
)
2630 return &pi
->fpregset
; /* already got 'em */
2633 if (pi
->ctl_fd
== 0 &&
2634 open_procinfo_files (pi
, FD_CTL
) == 0)
2643 tid_t pr_error_thread
;
2644 tfpregset_t thread_1
;
2647 thread_fpregs
.pr_count
= 1;
2648 thread_fpregs
.thread_1
.tid
= pi
->tid
;
2651 ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
) >= 0)
2653 pi
->fpregs_valid
= 1;
2654 return &pi
->fpregset
; /* got 'em now! */
2656 else if (pi
->tid
!= 0 &&
2657 ioctl (pi
->ctl_fd
, PIOCTGFPREG
, &thread_fpregs
) >= 0)
2659 memcpy (&pi
->fpregset
, &thread_fpregs
.thread_1
.pr_fpregs
,
2660 sizeof (pi
->fpregset
));
2661 pi
->fpregs_valid
= 1;
2662 return &pi
->fpregset
; /* got 'em now! */
2669 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
) >= 0)
2671 pi
->fpregs_valid
= 1;
2672 return &pi
->fpregset
; /* got 'em now! */
2685 * Function: proc_set_gregs
2687 * Write the general registers back to the process or LWP.
2688 * Returns non-zero for success, zero for failure.
2692 proc_set_gregs (procinfo
*pi
)
2694 gdb_gregset_t
*gregs
;
2697 if ((gregs
= proc_get_gregs (pi
)) == NULL
)
2698 return 0; /* get_regs has already warned */
2700 if (pi
->ctl_fd
== 0 &&
2701 open_procinfo_files (pi
, FD_CTL
) == 0)
2710 /* Use char array to avoid alignment issues. */
2711 char gregs
[sizeof (gdb_gregset_t
)];
2715 memcpy (&arg
.gregs
, gregs
, sizeof (arg
.gregs
));
2716 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2718 win
= (ioctl (pi
->ctl_fd
, PIOCSREG
, gregs
) >= 0);
2722 /* Policy: writing the regs invalidates our cache. */
2723 pi
->gregs_valid
= 0;
2728 * Function: proc_set_fpregs
2730 * Modify the floating point register set of the process or LWP.
2731 * Returns non-zero for success, zero for failure.
2735 proc_set_fpregs (procinfo
*pi
)
2737 gdb_fpregset_t
*fpregs
;
2740 if ((fpregs
= proc_get_fpregs (pi
)) == NULL
)
2741 return 0; /* get_fpregs has already warned */
2743 if (pi
->ctl_fd
== 0 &&
2744 open_procinfo_files (pi
, FD_CTL
) == 0)
2753 /* Use char array to avoid alignment issues. */
2754 char fpregs
[sizeof (gdb_fpregset_t
)];
2758 memcpy (&arg
.fpregs
, fpregs
, sizeof (arg
.fpregs
));
2759 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2763 win
= (ioctl (pi
->ctl_fd
, PIOCSFPREG
, fpregs
) >= 0);
2768 tid_t pr_error_thread
;
2769 tfpregset_t thread_1
;
2772 thread_fpregs
.pr_count
= 1;
2773 thread_fpregs
.thread_1
.tid
= pi
->tid
;
2774 memcpy (&thread_fpregs
.thread_1
.pr_fpregs
, fpregs
,
2776 win
= (ioctl (pi
->ctl_fd
, PIOCTSFPREG
, &thread_fpregs
) >= 0);
2779 win
= (ioctl (pi
->ctl_fd
, PIOCSFPREG
, fpregs
) >= 0);
2780 #endif /* osf PIOCTSFPREG */
2781 #endif /* NEW_PROC_API */
2784 /* Policy: writing the regs invalidates our cache. */
2785 pi
->fpregs_valid
= 0;
2790 * Function: proc_kill
2792 * Send a signal to the proc or lwp with the semantics of "kill()".
2793 * Returns non-zero for success, zero for failure.
2797 proc_kill (procinfo
*pi
, int signo
)
2802 * We might conceivably apply this operation to an LWP, and
2803 * the LWP's ctl file descriptor might not be open.
2806 if (pi
->ctl_fd
== 0 &&
2807 open_procinfo_files (pi
, FD_CTL
) == 0)
2814 procfs_ctl_t cmd
[2];
2818 win
= (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
2819 #else /* ioctl method */
2820 /* FIXME: do I need the Alpha OSF fixups present in
2821 procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */
2822 win
= (ioctl (pi
->ctl_fd
, PIOCKILL
, &signo
) >= 0);
2830 * Function: proc_parent_pid
2832 * Find the pid of the process that started this one.
2833 * Returns the parent process pid, or zero.
2837 proc_parent_pid (procinfo
*pi
)
2840 * We should never have to apply this operation to any procinfo
2841 * except the one for the main process. If that ever changes
2842 * for any reason, then take out the following clause and
2843 * replace it with one that makes sure the ctl_fd is open.
2847 pi
= find_procinfo_or_die (pi
->pid
, 0);
2849 if (!pi
->status_valid
)
2850 if (!proc_get_status (pi
))
2853 return pi
->prstatus
.pr_ppid
;
2857 /* Convert a target address (a.k.a. CORE_ADDR) into a host address
2858 (a.k.a void pointer)! */
2861 procfs_address_to_host_pointer (CORE_ADDR addr
)
2865 gdb_assert (sizeof (ptr
) == TYPE_LENGTH (builtin_type_void_data_ptr
));
2866 ADDRESS_TO_POINTER (builtin_type_void_data_ptr
, &ptr
, addr
);
2871 * Function: proc_set_watchpoint
2876 proc_set_watchpoint (procinfo
*pi
, CORE_ADDR addr
, int len
, int wflags
)
2878 #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS)
2881 /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */
2882 #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */
2887 char watch
[sizeof (prwatch_t
)];
2891 pwatch
= (prwatch_t
*) &arg
.watch
;
2892 /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to
2893 convert a target address into something that can be stored in a
2894 native data structure. */
2895 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
2896 pwatch
->pr_vaddr
= (uintptr_t) procfs_address_to_host_pointer (addr
);
2898 pwatch
->pr_vaddr
= (caddr_t
) procfs_address_to_host_pointer (addr
);
2900 pwatch
->pr_size
= len
;
2901 pwatch
->pr_wflags
= wflags
;
2902 #if defined(NEW_PROC_API) && defined (PCWATCH)
2904 return (write (pi
->ctl_fd
, &arg
, sizeof (arg
)) == sizeof (arg
));
2906 #if defined (PIOCSWATCH)
2907 return (ioctl (pi
->ctl_fd
, PIOCSWATCH
, pwatch
) >= 0);
2909 return 0; /* Fail */
2916 #ifdef TM_I386SOL2_H /* Is it hokey to use this? */
2918 #include <sys/sysi86.h>
2921 * Function: proc_get_LDT_entry
2927 * The 'key' is actually the value of the lower 16 bits of
2928 * the GS register for the LWP that we're interested in.
2930 * Return: matching ssh struct (LDT entry).
2934 proc_get_LDT_entry (procinfo
*pi
, int key
)
2936 static struct ssd
*ldt_entry
= NULL
;
2938 char pathname
[MAX_PROC_NAME_SIZE
];
2939 struct cleanup
*old_chain
= NULL
;
2942 /* Allocate space for one LDT entry.
2943 This alloc must persist, because we return a pointer to it. */
2944 if (ldt_entry
== NULL
)
2945 ldt_entry
= (struct ssd
*) xmalloc (sizeof (struct ssd
));
2947 /* Open the file descriptor for the LDT table. */
2948 sprintf (pathname
, "/proc/%d/ldt", pi
->pid
);
2949 if ((fd
= open_with_retry (pathname
, O_RDONLY
)) < 0)
2951 proc_warn (pi
, "proc_get_LDT_entry (open)", __LINE__
);
2954 /* Make sure it gets closed again! */
2955 old_chain
= make_cleanup_close (fd
);
2957 /* Now 'read' thru the table, find a match and return it. */
2958 while (read (fd
, ldt_entry
, sizeof (struct ssd
)) == sizeof (struct ssd
))
2960 if (ldt_entry
->sel
== 0 &&
2961 ldt_entry
->bo
== 0 &&
2962 ldt_entry
->acc1
== 0 &&
2963 ldt_entry
->acc2
== 0)
2964 break; /* end of table */
2965 /* If key matches, return this entry. */
2966 if (ldt_entry
->sel
== key
)
2969 /* Loop ended, match not found. */
2973 static int nalloc
= 0;
2975 /* Get the number of LDT entries. */
2976 if (ioctl (pi
->ctl_fd
, PIOCNLDT
, &nldt
) < 0)
2978 proc_warn (pi
, "proc_get_LDT_entry (PIOCNLDT)", __LINE__
);
2982 /* Allocate space for the number of LDT entries. */
2983 /* This alloc has to persist, 'cause we return a pointer to it. */
2986 ldt_entry
= (struct ssd
*)
2987 xrealloc (ldt_entry
, (nldt
+ 1) * sizeof (struct ssd
));
2991 /* Read the whole table in one gulp. */
2992 if (ioctl (pi
->ctl_fd
, PIOCLDT
, ldt_entry
) < 0)
2994 proc_warn (pi
, "proc_get_LDT_entry (PIOCLDT)", __LINE__
);
2998 /* Search the table and return the (first) entry matching 'key'. */
2999 for (i
= 0; i
< nldt
; i
++)
3000 if (ldt_entry
[i
].sel
== key
)
3001 return &ldt_entry
[i
];
3003 /* Loop ended, match not found. */
3008 #endif /* TM_I386SOL2_H */
3010 /* =============== END, non-thread part of /proc "MODULE" =============== */
3012 /* =================== Thread "MODULE" =================== */
3014 /* NOTE: you'll see more ifdefs and duplication of functions here,
3015 since there is a different way to do threads on every OS. */
3018 * Function: proc_get_nthreads
3020 * Return the number of threads for the process
3023 #if defined (PIOCNTHR) && defined (PIOCTLIST)
3028 proc_get_nthreads (procinfo
*pi
)
3032 if (ioctl (pi
->ctl_fd
, PIOCNTHR
, &nthreads
) < 0)
3033 proc_warn (pi
, "procfs: PIOCNTHR failed", __LINE__
);
3039 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
3041 * Solaris and Unixware version
3044 proc_get_nthreads (procinfo
*pi
)
3046 if (!pi
->status_valid
)
3047 if (!proc_get_status (pi
))
3051 * NEW_PROC_API: only works for the process procinfo,
3052 * because the LWP procinfos do not get prstatus filled in.
3055 if (pi
->tid
!= 0) /* find the parent process procinfo */
3056 pi
= find_procinfo_or_die (pi
->pid
, 0);
3058 return pi
->prstatus
.pr_nlwp
;
3066 proc_get_nthreads (procinfo
*pi
)
3074 * Function: proc_get_current_thread (LWP version)
3076 * Return the ID of the thread that had an event of interest.
3077 * (ie. the one that hit a breakpoint or other traced event).
3078 * All other things being equal, this should be the ID of a
3079 * thread that is currently executing.
3082 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
3084 * Solaris and Unixware version
3087 proc_get_current_thread (procinfo
*pi
)
3090 * Note: this should be applied to the root procinfo for the process,
3091 * not to the procinfo for an LWP. If applied to the procinfo for
3092 * an LWP, it will simply return that LWP's ID. In that case,
3093 * find the parent process procinfo.
3097 pi
= find_procinfo_or_die (pi
->pid
, 0);
3099 if (!pi
->status_valid
)
3100 if (!proc_get_status (pi
))
3104 return pi
->prstatus
.pr_lwp
.pr_lwpid
;
3106 return pi
->prstatus
.pr_who
;
3111 #if defined (PIOCNTHR) && defined (PIOCTLIST)
3116 proc_get_current_thread (procinfo
*pi
)
3118 #if 0 /* FIXME: not ready for prime time? */
3119 return pi
->prstatus
.pr_tid
;
3130 proc_get_current_thread (procinfo
*pi
)
3139 * Function: proc_update_threads
3141 * Discover the IDs of all the threads within the process, and
3142 * create a procinfo for each of them (chained to the parent).
3144 * This unfortunately requires a different method on every OS.
3146 * Return: non-zero for success, zero for failure.
3150 proc_delete_dead_threads (procinfo
*parent
, procinfo
*thread
, void *ignore
)
3152 if (thread
&& parent
) /* sanity */
3154 thread
->status_valid
= 0;
3155 if (!proc_get_status (thread
))
3156 destroy_one_procinfo (&parent
->thread_list
, thread
);
3158 return 0; /* keep iterating */
3161 #if defined (PIOCLSTATUS)
3163 * Solaris 2.5 (ioctl) version
3166 proc_update_threads (procinfo
*pi
)
3168 gdb_prstatus_t
*prstatus
;
3169 struct cleanup
*old_chain
= NULL
;
3174 * We should never have to apply this operation to any procinfo
3175 * except the one for the main process. If that ever changes
3176 * for any reason, then take out the following clause and
3177 * replace it with one that makes sure the ctl_fd is open.
3181 pi
= find_procinfo_or_die (pi
->pid
, 0);
3183 proc_iterate_over_threads (pi
, proc_delete_dead_threads
, NULL
);
3185 if ((nlwp
= proc_get_nthreads (pi
)) <= 1)
3186 return 1; /* Process is not multi-threaded; nothing to do. */
3188 prstatus
= xmalloc (sizeof (gdb_prstatus_t
) * (nlwp
+ 1));
3190 old_chain
= make_cleanup (xfree
, prstatus
);
3191 if (ioctl (pi
->ctl_fd
, PIOCLSTATUS
, prstatus
) < 0)
3192 proc_error (pi
, "update_threads (PIOCLSTATUS)", __LINE__
);
3194 /* Skip element zero, which represents the process as a whole. */
3195 for (i
= 1; i
< nlwp
+ 1; i
++)
3197 if ((thread
= create_procinfo (pi
->pid
, prstatus
[i
].pr_who
)) == NULL
)
3198 proc_error (pi
, "update_threads, create_procinfo", __LINE__
);
3200 memcpy (&thread
->prstatus
, &prstatus
[i
], sizeof (*prstatus
));
3201 thread
->status_valid
= 1;
3203 pi
->threads_valid
= 1;
3204 do_cleanups (old_chain
);
3210 * Unixware and Solaris 6 (and later) version
3213 do_closedir_cleanup (void *dir
)
3219 proc_update_threads (procinfo
*pi
)
3221 char pathname
[MAX_PROC_NAME_SIZE
+ 16];
3222 struct dirent
*direntry
;
3223 struct cleanup
*old_chain
= NULL
;
3229 * We should never have to apply this operation to any procinfo
3230 * except the one for the main process. If that ever changes
3231 * for any reason, then take out the following clause and
3232 * replace it with one that makes sure the ctl_fd is open.
3236 pi
= find_procinfo_or_die (pi
->pid
, 0);
3238 proc_iterate_over_threads (pi
, proc_delete_dead_threads
, NULL
);
3243 * Note: this brute-force method is the only way I know of
3244 * to accomplish this task on Unixware. This method will
3245 * also work on Solaris 2.6 and 2.7. There is a much simpler
3246 * and more elegant way to do this on Solaris, but the margins
3247 * of this manuscript are too small to write it here... ;-)
3250 strcpy (pathname
, pi
->pathname
);
3251 strcat (pathname
, "/lwp");
3252 if ((dirp
= opendir (pathname
)) == NULL
)
3253 proc_error (pi
, "update_threads, opendir", __LINE__
);
3255 old_chain
= make_cleanup (do_closedir_cleanup
, dirp
);
3256 while ((direntry
= readdir (dirp
)) != NULL
)
3257 if (direntry
->d_name
[0] != '.') /* skip '.' and '..' */
3259 lwpid
= atoi (&direntry
->d_name
[0]);
3260 if ((thread
= create_procinfo (pi
->pid
, lwpid
)) == NULL
)
3261 proc_error (pi
, "update_threads, create_procinfo", __LINE__
);
3263 pi
->threads_valid
= 1;
3264 do_cleanups (old_chain
);
3273 proc_update_threads (procinfo
*pi
)
3279 * We should never have to apply this operation to any procinfo
3280 * except the one for the main process. If that ever changes
3281 * for any reason, then take out the following clause and
3282 * replace it with one that makes sure the ctl_fd is open.
3286 pi
= find_procinfo_or_die (pi
->pid
, 0);
3288 proc_iterate_over_threads (pi
, proc_delete_dead_threads
, NULL
);
3290 nthreads
= proc_get_nthreads (pi
);
3292 return 0; /* nothing to do for 1 or fewer threads */
3294 threads
= xmalloc (nthreads
* sizeof (tid_t
));
3296 if (ioctl (pi
->ctl_fd
, PIOCTLIST
, threads
) < 0)
3297 proc_error (pi
, "procfs: update_threads (PIOCTLIST)", __LINE__
);
3299 for (i
= 0; i
< nthreads
; i
++)
3301 if (!find_procinfo (pi
->pid
, threads
[i
]))
3302 if (!create_procinfo (pi
->pid
, threads
[i
]))
3303 proc_error (pi
, "update_threads, create_procinfo", __LINE__
);
3305 pi
->threads_valid
= 1;
3313 proc_update_threads (procinfo
*pi
)
3317 #endif /* OSF PIOCTLIST */
3318 #endif /* NEW_PROC_API */
3319 #endif /* SOL 2.5 PIOCLSTATUS */
3322 * Function: proc_iterate_over_threads
3325 * Given a pointer to a function, call that function once
3326 * for each lwp in the procinfo list, until the function
3327 * returns non-zero, in which event return the value
3328 * returned by the function.
3330 * Note: this function does NOT call update_threads.
3331 * If you want to discover new threads first, you must
3332 * call that function explicitly. This function just makes
3333 * a quick pass over the currently-known procinfos.
3336 * pi - parent process procinfo
3337 * func - per-thread function
3338 * ptr - opaque parameter for function.
3341 * First non-zero return value from the callee, or zero.
3345 proc_iterate_over_threads (procinfo
*pi
,
3346 int (*func
) (procinfo
*, procinfo
*, void *),
3349 procinfo
*thread
, *next
;
3353 * We should never have to apply this operation to any procinfo
3354 * except the one for the main process. If that ever changes
3355 * for any reason, then take out the following clause and
3356 * replace it with one that makes sure the ctl_fd is open.
3360 pi
= find_procinfo_or_die (pi
->pid
, 0);
3362 for (thread
= pi
->thread_list
; thread
!= NULL
; thread
= next
)
3364 next
= thread
->next
; /* in case thread is destroyed */
3365 if ((retval
= (*func
) (pi
, thread
, ptr
)) != 0)
3372 /* =================== END, Thread "MODULE" =================== */
3374 /* =================== END, /proc "MODULE" =================== */
3376 /* =================== GDB "MODULE" =================== */
3379 * Here are all of the gdb target vector functions and their friends.
3382 static ptid_t
do_attach (ptid_t ptid
);
3383 static void do_detach (int signo
);
3384 static int register_gdb_signals (procinfo
*, gdb_sigset_t
*);
3385 static void proc_trace_syscalls_1 (procinfo
*pi
, int syscallnum
,
3386 int entry_or_exit
, int mode
, int from_tty
);
3387 static int insert_dbx_link_breakpoint (procinfo
*pi
);
3388 static void remove_dbx_link_breakpoint (void);
3390 /* On mips-irix, we need to insert a breakpoint at __dbx_link during
3391 the startup phase. The following two variables are used to record
3392 the address of the breakpoint, and the code that was replaced by
3394 static int dbx_link_bpt_addr
= 0;
3395 static char dbx_link_shadow_contents
[BREAKPOINT_MAX
];
3398 * Function: procfs_debug_inferior
3400 * Sets up the inferior to be debugged.
3401 * Registers to trace signals, hardware faults, and syscalls.
3402 * Note: does not set RLC flag: caller may want to customize that.
3404 * Returns: zero for success (note! unlike most functions in this module)
3405 * On failure, returns the LINE NUMBER where it failed!
3409 procfs_debug_inferior (procinfo
*pi
)
3411 fltset_t traced_faults
;
3412 gdb_sigset_t traced_signals
;
3413 sysset_t
*traced_syscall_entries
;
3414 sysset_t
*traced_syscall_exits
;
3417 #ifdef PROCFS_DONT_TRACE_FAULTS
3418 /* On some systems (OSF), we don't trace hardware faults.
3419 Apparently it's enough that we catch them as signals.
3420 Wonder why we don't just do that in general? */
3421 premptyset (&traced_faults
); /* don't trace faults. */
3423 /* Register to trace hardware faults in the child. */
3424 prfillset (&traced_faults
); /* trace all faults... */
3425 prdelset (&traced_faults
, FLTPAGE
); /* except page fault. */
3427 if (!proc_set_traced_faults (pi
, &traced_faults
))
3430 /* Register to trace selected signals in the child. */
3431 premptyset (&traced_signals
);
3432 if (!register_gdb_signals (pi
, &traced_signals
))
3436 /* Register to trace the 'exit' system call (on entry). */
3437 traced_syscall_entries
= sysset_t_alloc (pi
);
3438 gdb_premptysysset (traced_syscall_entries
);
3440 gdb_praddsysset (traced_syscall_entries
, SYS_exit
);
3443 gdb_praddsysset (traced_syscall_entries
, SYS_lwpexit
); /* And _lwp_exit... */
3446 gdb_praddsysset (traced_syscall_entries
, SYS_lwp_exit
);
3448 #ifdef DYNAMIC_SYSCALLS
3450 int callnum
= find_syscall (pi
, "_exit");
3452 gdb_praddsysset (traced_syscall_entries
, callnum
);
3456 status
= proc_set_traced_sysentry (pi
, traced_syscall_entries
);
3457 xfree (traced_syscall_entries
);
3461 #ifdef PRFS_STOPEXEC /* defined on OSF */
3462 /* OSF method for tracing exec syscalls. Quoting:
3463 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
3464 exits from exec system calls because of the user level loader. */
3465 /* FIXME: make nice and maybe move into an access function. */
3469 if (ioctl (pi
->ctl_fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
3472 prfs_flags
|= PRFS_STOPEXEC
;
3474 if (ioctl (pi
->ctl_fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
3477 #else /* not PRFS_STOPEXEC */
3478 /* Everyone else's (except OSF) method for tracing exec syscalls */
3480 Not all systems with /proc have all the exec* syscalls with the same
3481 names. On the SGI, for example, there is no SYS_exec, but there
3482 *is* a SYS_execv. So, we try to account for that. */
3484 traced_syscall_exits
= sysset_t_alloc (pi
);
3485 gdb_premptysysset (traced_syscall_exits
);
3487 gdb_praddsysset (traced_syscall_exits
, SYS_exec
);
3490 gdb_praddsysset (traced_syscall_exits
, SYS_execve
);
3493 gdb_praddsysset (traced_syscall_exits
, SYS_execv
);
3496 #ifdef SYS_lwpcreate
3497 gdb_praddsysset (traced_syscall_exits
, SYS_lwpcreate
);
3498 gdb_praddsysset (traced_syscall_exits
, SYS_lwpexit
);
3501 #ifdef SYS_lwp_create /* FIXME: once only, please */
3502 gdb_praddsysset (traced_syscall_exits
, SYS_lwp_create
);
3503 gdb_praddsysset (traced_syscall_exits
, SYS_lwp_exit
);
3506 #ifdef DYNAMIC_SYSCALLS
3508 int callnum
= find_syscall (pi
, "execve");
3510 gdb_praddsysset (traced_syscall_exits
, callnum
);
3511 callnum
= find_syscall (pi
, "ra_execve");
3513 gdb_praddsysset (traced_syscall_exits
, callnum
);
3517 status
= proc_set_traced_sysexit (pi
, traced_syscall_exits
);
3518 xfree (traced_syscall_exits
);
3522 #endif /* PRFS_STOPEXEC */
3527 procfs_attach (char *args
, int from_tty
)
3533 error_no_arg ("process-id to attach");
3536 if (pid
== getpid ())
3537 error ("Attaching GDB to itself is not a good idea...");
3541 exec_file
= get_exec_file (0);
3544 printf_filtered ("Attaching to program `%s', %s\n",
3545 exec_file
, target_pid_to_str (pid_to_ptid (pid
)));
3547 printf_filtered ("Attaching to %s\n",
3548 target_pid_to_str (pid_to_ptid (pid
)));
3552 inferior_ptid
= do_attach (pid_to_ptid (pid
));
3553 push_target (&procfs_ops
);
3557 procfs_detach (char *args
, int from_tty
)
3566 int pid
= PIDGET (inferior_ptid
);
3569 exec_file
= get_exec_file (0);
3570 if (exec_file
== NULL
)
3573 printf_filtered ("Detaching from program: %s, %s\n", exec_file
,
3574 target_pid_to_str (pid_to_ptid (pid
)));
3575 gdb_flush (gdb_stdout
);
3580 inferior_ptid
= null_ptid
;
3581 unpush_target (&procfs_ops
);
3585 do_attach (ptid_t ptid
)
3590 if ((pi
= create_procinfo (PIDGET (ptid
), 0)) == NULL
)
3591 perror ("procfs: out of memory in 'attach'");
3593 if (!open_procinfo_files (pi
, FD_CTL
))
3595 fprintf_filtered (gdb_stderr
, "procfs:%d -- ", __LINE__
);
3596 sprintf (errmsg
, "do_attach: couldn't open /proc file for process %d",
3598 dead_procinfo (pi
, errmsg
, NOKILL
);
3601 /* Stop the process (if it isn't already stopped). */
3602 if (proc_flags (pi
) & (PR_STOPPED
| PR_ISTOP
))
3604 pi
->was_stopped
= 1;
3605 proc_prettyprint_why (proc_why (pi
), proc_what (pi
), 1);
3609 pi
->was_stopped
= 0;
3610 /* Set the process to run again when we close it. */
3611 if (!proc_set_run_on_last_close (pi
))
3612 dead_procinfo (pi
, "do_attach: couldn't set RLC.", NOKILL
);
3614 /* Now stop the process. */
3615 if (!proc_stop_process (pi
))
3616 dead_procinfo (pi
, "do_attach: couldn't stop the process.", NOKILL
);
3617 pi
->ignore_next_sigstop
= 1;
3619 /* Save some of the /proc state to be restored if we detach. */
3620 if (!proc_get_traced_faults (pi
, &pi
->saved_fltset
))
3621 dead_procinfo (pi
, "do_attach: couldn't save traced faults.", NOKILL
);
3622 if (!proc_get_traced_signals (pi
, &pi
->saved_sigset
))
3623 dead_procinfo (pi
, "do_attach: couldn't save traced signals.", NOKILL
);
3624 if (!proc_get_traced_sysentry (pi
, pi
->saved_entryset
))
3625 dead_procinfo (pi
, "do_attach: couldn't save traced syscall entries.",
3627 if (!proc_get_traced_sysexit (pi
, pi
->saved_exitset
))
3628 dead_procinfo (pi
, "do_attach: couldn't save traced syscall exits.",
3630 if (!proc_get_held_signals (pi
, &pi
->saved_sighold
))
3631 dead_procinfo (pi
, "do_attach: couldn't save held signals.", NOKILL
);
3633 if ((fail
= procfs_debug_inferior (pi
)) != 0)
3634 dead_procinfo (pi
, "do_attach: failed in procfs_debug_inferior", NOKILL
);
3636 /* Let GDB know that the inferior was attached. */
3638 return MERGEPID (pi
->pid
, proc_get_current_thread (pi
));
3642 do_detach (int signo
)
3646 /* Find procinfo for the main process */
3647 pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0); /* FIXME: threads */
3649 if (!proc_set_current_signal (pi
, signo
))
3650 proc_warn (pi
, "do_detach, set_current_signal", __LINE__
);
3652 if (!proc_set_traced_signals (pi
, &pi
->saved_sigset
))
3653 proc_warn (pi
, "do_detach, set_traced_signal", __LINE__
);
3655 if (!proc_set_traced_faults (pi
, &pi
->saved_fltset
))
3656 proc_warn (pi
, "do_detach, set_traced_faults", __LINE__
);
3658 if (!proc_set_traced_sysentry (pi
, pi
->saved_entryset
))
3659 proc_warn (pi
, "do_detach, set_traced_sysentry", __LINE__
);
3661 if (!proc_set_traced_sysexit (pi
, pi
->saved_exitset
))
3662 proc_warn (pi
, "do_detach, set_traced_sysexit", __LINE__
);
3664 if (!proc_set_held_signals (pi
, &pi
->saved_sighold
))
3665 proc_warn (pi
, "do_detach, set_held_signals", __LINE__
);
3667 if (signo
|| (proc_flags (pi
) & (PR_STOPPED
| PR_ISTOP
)))
3668 if (signo
|| !(pi
->was_stopped
) ||
3669 query ("Was stopped when attached, make it runnable again? "))
3671 /* Clear any pending signal. */
3672 if (!proc_clear_current_fault (pi
))
3673 proc_warn (pi
, "do_detach, clear_current_fault", __LINE__
);
3675 if (signo
== 0 && !proc_clear_current_signal (pi
))
3676 proc_warn (pi
, "do_detach, clear_current_signal", __LINE__
);
3678 if (!proc_set_run_on_last_close (pi
))
3679 proc_warn (pi
, "do_detach, set_rlc", __LINE__
);
3683 destroy_procinfo (pi
);
3689 * Since the /proc interface cannot give us individual registers,
3690 * we pay no attention to the (regno) argument, and just fetch them all.
3691 * This results in the possibility that we will do unnecessarily many
3692 * fetches, since we may be called repeatedly for individual registers.
3693 * So we cache the results, and mark the cache invalid when the process
3698 procfs_fetch_registers (int regno
)
3700 gdb_fpregset_t
*fpregs
;
3701 gdb_gregset_t
*gregs
;
3706 pid
= PIDGET (inferior_ptid
);
3707 tid
= TIDGET (inferior_ptid
);
3709 /* First look up procinfo for the main process. */
3710 pi
= find_procinfo_or_die (pid
, 0);
3712 /* If the event thread is not the same as GDB's requested thread
3713 (ie. inferior_ptid), then look up procinfo for the requested
3716 (tid
!= proc_get_current_thread (pi
)))
3717 pi
= find_procinfo_or_die (pid
, tid
);
3720 error ("procfs: fetch_registers failed to find procinfo for %s",
3721 target_pid_to_str (inferior_ptid
));
3723 if ((gregs
= proc_get_gregs (pi
)) == NULL
)
3724 proc_error (pi
, "fetch_registers, get_gregs", __LINE__
);
3726 supply_gregset (gregs
);
3728 if (FP0_REGNUM
>= 0) /* need floating point? */
3730 if ((regno
>= 0 && regno
< FP0_REGNUM
)
3731 || regno
== PC_REGNUM
3732 || regno
== DEPRECATED_FP_REGNUM
3733 || regno
== SP_REGNUM
)
3734 return; /* not a floating point register */
3736 if ((fpregs
= proc_get_fpregs (pi
)) == NULL
)
3737 proc_error (pi
, "fetch_registers, get_fpregs", __LINE__
);
3739 supply_fpregset (fpregs
);
3743 /* Get ready to modify the registers array. On machines which store
3744 individual registers, this doesn't need to do anything. On
3745 machines which store all the registers in one fell swoop, such as
3746 /proc, this makes sure that registers contains all the registers
3747 from the program being debugged. */
3750 procfs_prepare_to_store (void)
3752 #ifdef CHILD_PREPARE_TO_STORE
3753 CHILD_PREPARE_TO_STORE ();
3760 * Since the /proc interface will not read individual registers,
3761 * we will cache these requests until the process is resumed, and
3762 * only then write them back to the inferior process.
3764 * FIXME: is that a really bad idea? Have to think about cases
3765 * where writing one register might affect the value of others, etc.
3769 procfs_store_registers (int regno
)
3771 gdb_fpregset_t
*fpregs
;
3772 gdb_gregset_t
*gregs
;
3777 pid
= PIDGET (inferior_ptid
);
3778 tid
= TIDGET (inferior_ptid
);
3780 /* First find procinfo for main process */
3781 pi
= find_procinfo_or_die (pid
, 0);
3783 /* If current lwp for process is not the same as requested thread
3784 (ie. inferior_ptid), then find procinfo for the requested thread. */
3787 (tid
!= proc_get_current_thread (pi
)))
3788 pi
= find_procinfo_or_die (pid
, tid
);
3791 error ("procfs: store_registers: failed to find procinfo for %s",
3792 target_pid_to_str (inferior_ptid
));
3794 if ((gregs
= proc_get_gregs (pi
)) == NULL
)
3795 proc_error (pi
, "store_registers, get_gregs", __LINE__
);
3797 fill_gregset (gregs
, regno
);
3798 if (!proc_set_gregs (pi
))
3799 proc_error (pi
, "store_registers, set_gregs", __LINE__
);
3801 if (FP0_REGNUM
>= 0) /* need floating point? */
3803 if ((regno
>= 0 && regno
< FP0_REGNUM
)
3804 || regno
== PC_REGNUM
3805 || regno
== DEPRECATED_FP_REGNUM
3806 || regno
== SP_REGNUM
)
3807 return; /* not a floating point register */
3809 if ((fpregs
= proc_get_fpregs (pi
)) == NULL
)
3810 proc_error (pi
, "store_registers, get_fpregs", __LINE__
);
3812 fill_fpregset (fpregs
, regno
);
3813 if (!proc_set_fpregs (pi
))
3814 proc_error (pi
, "store_registers, set_fpregs", __LINE__
);
3819 syscall_is_lwp_exit (procinfo
*pi
, int scall
)
3823 if (scall
== SYS_lwp_exit
)
3827 if (scall
== SYS_lwpexit
)
3834 syscall_is_exit (procinfo
*pi
, int scall
)
3837 if (scall
== SYS_exit
)
3840 #ifdef DYNAMIC_SYSCALLS
3841 if (find_syscall (pi
, "_exit") == scall
)
3848 syscall_is_exec (procinfo
*pi
, int scall
)
3851 if (scall
== SYS_exec
)
3855 if (scall
== SYS_execv
)
3859 if (scall
== SYS_execve
)
3862 #ifdef DYNAMIC_SYSCALLS
3863 if (find_syscall (pi
, "_execve"))
3865 if (find_syscall (pi
, "ra_execve"))
3872 syscall_is_lwp_create (procinfo
*pi
, int scall
)
3874 #ifdef SYS_lwp_create
3875 if (scall
== SYS_lwp_create
)
3878 #ifdef SYS_lwpcreate
3879 if (scall
== SYS_lwpcreate
)
3886 * Function: target_wait
3888 * Retrieve the next stop event from the child process.
3889 * If child has not stopped yet, wait for it to stop.
3890 * Translate /proc eventcodes (or possibly wait eventcodes)
3891 * into gdb internal event codes.
3893 * Return: id of process (and possibly thread) that incurred the event.
3894 * event codes are returned thru a pointer parameter.
3898 procfs_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3900 /* First cut: loosely based on original version 2.1 */
3904 ptid_t retval
, temp_ptid
;
3905 int why
, what
, flags
;
3912 retval
= pid_to_ptid (-1);
3914 /* Find procinfo for main process */
3915 pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0);
3918 /* We must assume that the status is stale now... */
3919 pi
->status_valid
= 0;
3920 pi
->gregs_valid
= 0;
3921 pi
->fpregs_valid
= 0;
3923 #if 0 /* just try this out... */
3924 flags
= proc_flags (pi
);
3925 why
= proc_why (pi
);
3926 if ((flags
& PR_STOPPED
) && (why
== PR_REQUESTED
))
3927 pi
->status_valid
= 0; /* re-read again, IMMEDIATELY... */
3929 /* If child is not stopped, wait for it to stop. */
3930 if (!(proc_flags (pi
) & (PR_STOPPED
| PR_ISTOP
)) &&
3931 !proc_wait_for_stop (pi
))
3933 /* wait_for_stop failed: has the child terminated? */
3934 if (errno
== ENOENT
)
3938 /* /proc file not found; presumably child has terminated. */
3939 wait_retval
= wait (&wstat
); /* "wait" for the child's exit */
3941 if (wait_retval
!= PIDGET (inferior_ptid
)) /* wrong child? */
3942 error ("procfs: couldn't stop process %d: wait returned %d\n",
3943 PIDGET (inferior_ptid
), wait_retval
);
3944 /* FIXME: might I not just use waitpid?
3945 Or try find_procinfo to see if I know about this child? */
3946 retval
= pid_to_ptid (wait_retval
);
3948 else if (errno
== EINTR
)
3952 /* Unknown error from wait_for_stop. */
3953 proc_error (pi
, "target_wait (wait_for_stop)", __LINE__
);
3958 /* This long block is reached if either:
3959 a) the child was already stopped, or
3960 b) we successfully waited for the child with wait_for_stop.
3961 This block will analyze the /proc status, and translate it
3962 into a waitstatus for GDB.
3964 If we actually had to call wait because the /proc file
3965 is gone (child terminated), then we skip this block,
3966 because we already have a waitstatus. */
3968 flags
= proc_flags (pi
);
3969 why
= proc_why (pi
);
3970 what
= proc_what (pi
);
3972 if (flags
& (PR_STOPPED
| PR_ISTOP
))
3975 /* If it's running async (for single_thread control),
3976 set it back to normal again. */
3977 if (flags
& PR_ASYNC
)
3978 if (!proc_unset_async (pi
))
3979 proc_error (pi
, "target_wait, unset_async", __LINE__
);
3983 proc_prettyprint_why (why
, what
, 1);
3985 /* The 'pid' we will return to GDB is composed of
3986 the process ID plus the lwp ID. */
3987 retval
= MERGEPID (pi
->pid
, proc_get_current_thread (pi
));
3991 wstat
= (what
<< 8) | 0177;
3994 if (syscall_is_lwp_exit (pi
, what
))
3996 printf_filtered ("[%s exited]\n",
3997 target_pid_to_str (retval
));
3998 delete_thread (retval
);
3999 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
4002 else if (syscall_is_exit (pi
, what
))
4004 /* Handle SYS_exit call only */
4005 /* Stopped at entry to SYS_exit.
4006 Make it runnable, resume it, then use
4007 the wait system call to get its exit code.
4008 Proc_run_process always clears the current
4010 Then return its exit status. */
4011 pi
->status_valid
= 0;
4013 /* FIXME: what we should do is return
4014 TARGET_WAITKIND_SPURIOUS. */
4015 if (!proc_run_process (pi
, 0, 0))
4016 proc_error (pi
, "target_wait, run_process", __LINE__
);
4019 /* Don't call wait: simulate waiting for exit,
4020 return a "success" exit code. Bogus: what if
4021 it returns something else? */
4023 retval
= inferior_ptid
; /* ? ? ? */
4027 int temp
= wait (&wstat
);
4029 /* FIXME: shouldn't I make sure I get the right
4030 event from the right process? If (for
4031 instance) I have killed an earlier inferior
4032 process but failed to clean up after it
4033 somehow, I could get its termination event
4036 /* If wait returns -1, that's what we return to GDB. */
4038 retval
= pid_to_ptid (temp
);
4043 printf_filtered ("procfs: trapped on entry to ");
4044 proc_prettyprint_syscall (proc_what (pi
), 0);
4045 printf_filtered ("\n");
4048 long i
, nsysargs
, *sysargs
;
4050 if ((nsysargs
= proc_nsysarg (pi
)) > 0 &&
4051 (sysargs
= proc_sysargs (pi
)) != NULL
)
4053 printf_filtered ("%ld syscall arguments:\n", nsysargs
);
4054 for (i
= 0; i
< nsysargs
; i
++)
4055 printf_filtered ("#%ld: 0x%08lx\n",
4063 /* How to exit gracefully, returning "unknown event" */
4064 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
4065 return inferior_ptid
;
4069 /* How to keep going without returning to wfi: */
4070 target_resume (ptid
, 0, TARGET_SIGNAL_0
);
4076 if (syscall_is_exec (pi
, what
))
4078 /* Hopefully this is our own "fork-child" execing
4079 the real child. Hoax this event into a trap, and
4080 GDB will see the child about to execute its start
4082 wstat
= (SIGTRAP
<< 8) | 0177;
4085 else if (what
== SYS_syssgi
)
4087 /* see if we can break on dbx_link(). If yes, then
4088 we no longer need the SYS_syssgi notifications. */
4089 if (insert_dbx_link_breakpoint (pi
))
4090 proc_trace_syscalls_1 (pi
, SYS_syssgi
, PR_SYSEXIT
,
4093 /* This is an internal event and should be transparent
4094 to wfi, so resume the execution and wait again. See
4095 comment in procfs_init_inferior() for more details. */
4096 target_resume (ptid
, 0, TARGET_SIGNAL_0
);
4100 else if (syscall_is_lwp_create (pi
, what
))
4103 * This syscall is somewhat like fork/exec.
4104 * We will get the event twice: once for the parent LWP,
4105 * and once for the child. We should already know about
4106 * the parent LWP, but the child will be new to us. So,
4107 * whenever we get this event, if it represents a new
4108 * thread, simply add the thread to the list.
4111 /* If not in procinfo list, add it. */
4112 temp_tid
= proc_get_current_thread (pi
);
4113 if (!find_procinfo (pi
->pid
, temp_tid
))
4114 create_procinfo (pi
->pid
, temp_tid
);
4116 temp_ptid
= MERGEPID (pi
->pid
, temp_tid
);
4117 /* If not in GDB's thread list, add it. */
4118 if (!in_thread_list (temp_ptid
))
4120 printf_filtered ("[New %s]\n",
4121 target_pid_to_str (temp_ptid
));
4122 add_thread (temp_ptid
);
4124 /* Return to WFI, but tell it to immediately resume. */
4125 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
4126 return inferior_ptid
;
4128 else if (syscall_is_lwp_exit (pi
, what
))
4130 printf_filtered ("[%s exited]\n",
4131 target_pid_to_str (retval
));
4132 delete_thread (retval
);
4133 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
4138 /* FIXME: Do we need to handle SYS_sproc,
4139 SYS_fork, or SYS_vfork here? The old procfs
4140 seemed to use this event to handle threads on
4141 older (non-LWP) systems, where I'm assuming
4142 that threads were actually separate processes.
4143 Irix, maybe? Anyway, low priority for now. */
4147 printf_filtered ("procfs: trapped on exit from ");
4148 proc_prettyprint_syscall (proc_what (pi
), 0);
4149 printf_filtered ("\n");
4152 long i
, nsysargs
, *sysargs
;
4154 if ((nsysargs
= proc_nsysarg (pi
)) > 0 &&
4155 (sysargs
= proc_sysargs (pi
)) != NULL
)
4157 printf_filtered ("%ld syscall arguments:\n", nsysargs
);
4158 for (i
= 0; i
< nsysargs
; i
++)
4159 printf_filtered ("#%ld: 0x%08lx\n",
4164 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
4165 return inferior_ptid
;
4170 wstat
= (SIGSTOP
<< 8) | 0177;
4175 printf_filtered ("Retry #%d:\n", retry
);
4176 pi
->status_valid
= 0;
4181 /* If not in procinfo list, add it. */
4182 temp_tid
= proc_get_current_thread (pi
);
4183 if (!find_procinfo (pi
->pid
, temp_tid
))
4184 create_procinfo (pi
->pid
, temp_tid
);
4186 /* If not in GDB's thread list, add it. */
4187 temp_ptid
= MERGEPID (pi
->pid
, temp_tid
);
4188 if (!in_thread_list (temp_ptid
))
4190 printf_filtered ("[New %s]\n",
4191 target_pid_to_str (temp_ptid
));
4192 add_thread (temp_ptid
);
4195 status
->kind
= TARGET_WAITKIND_STOPPED
;
4196 status
->value
.sig
= 0;
4201 wstat
= (what
<< 8) | 0177;
4207 wstat
= (SIGTRAP
<< 8) | 0177;
4212 wstat
= (SIGTRAP
<< 8) | 0177;
4215 /* FIXME: use si_signo where possible. */
4217 #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */
4220 wstat
= (SIGILL
<< 8) | 0177;
4223 #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */
4226 /* If we hit our __dbx_link() internal breakpoint,
4227 then remove it. See comments in procfs_init_inferior()
4228 for more details. */
4229 if (dbx_link_bpt_addr
!= 0
4230 && dbx_link_bpt_addr
== read_pc ())
4231 remove_dbx_link_breakpoint ();
4233 wstat
= (SIGTRAP
<< 8) | 0177;
4237 #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */
4240 wstat
= (SIGSEGV
<< 8) | 0177;
4244 #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */
4247 wstat
= (SIGFPE
<< 8) | 0177;
4249 case FLTPAGE
: /* Recoverable page fault */
4250 default: /* FIXME: use si_signo if possible for fault */
4251 retval
= pid_to_ptid (-1);
4252 printf_filtered ("procfs:%d -- ", __LINE__
);
4253 printf_filtered ("child stopped for unknown reason:\n");
4254 proc_prettyprint_why (why
, what
, 1);
4255 error ("... giving up...");
4258 break; /* case PR_FAULTED: */
4259 default: /* switch (why) unmatched */
4260 printf_filtered ("procfs:%d -- ", __LINE__
);
4261 printf_filtered ("child stopped for unknown reason:\n");
4262 proc_prettyprint_why (why
, what
, 1);
4263 error ("... giving up...");
4267 * Got this far without error:
4268 * If retval isn't in the threads database, add it.
4270 if (PIDGET (retval
) > 0 &&
4271 !ptid_equal (retval
, inferior_ptid
) &&
4272 !in_thread_list (retval
))
4275 * We have a new thread.
4276 * We need to add it both to GDB's list and to our own.
4277 * If we don't create a procinfo, resume may be unhappy
4280 printf_filtered ("[New %s]\n", target_pid_to_str (retval
));
4281 add_thread (retval
);
4282 if (find_procinfo (PIDGET (retval
), TIDGET (retval
)) == NULL
)
4283 create_procinfo (PIDGET (retval
), TIDGET (retval
));
4285 /* In addition, it's possible that this is the first
4286 * new thread we've seen, in which case we may not
4287 * have created entries for inferior_ptid yet.
4289 if (TIDGET (inferior_ptid
) != 0)
4291 if (!in_thread_list (inferior_ptid
))
4292 add_thread (inferior_ptid
);
4293 if (find_procinfo (PIDGET (inferior_ptid
),
4294 TIDGET (inferior_ptid
)) == NULL
)
4295 create_procinfo (PIDGET (inferior_ptid
),
4296 TIDGET (inferior_ptid
));
4300 else /* flags do not indicate STOPPED */
4302 /* surely this can't happen... */
4303 printf_filtered ("procfs:%d -- process not stopped.\n",
4305 proc_prettyprint_flags (flags
, 1);
4306 error ("procfs: ...giving up...");
4311 store_waitstatus (status
, wstat
);
4317 /* Perform a partial transfer to/from the specified object. For
4318 memory transfers, fall back to the old memory xfer functions. */
4321 procfs_xfer_partial (struct target_ops
*ops
, enum target_object object
,
4322 const char *annex
, void *readbuf
,
4323 const void *writebuf
, ULONGEST offset
, LONGEST len
)
4327 case TARGET_OBJECT_MEMORY
:
4329 return (*ops
->deprecated_xfer_memory
) (offset
, readbuf
, len
,
4330 0/*write*/, NULL
, ops
);
4332 return (*ops
->deprecated_xfer_memory
) (offset
, writebuf
, len
,
4333 1/*write*/, NULL
, ops
);
4337 case TARGET_OBJECT_AUXV
:
4338 return procfs_xfer_auxv (ops
, object
, annex
, readbuf
, writebuf
,
4343 if (ops
->beneath
!= NULL
)
4344 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
4345 readbuf
, writebuf
, offset
, len
);
4351 /* Transfer LEN bytes between GDB address MYADDR and target address
4352 MEMADDR. If DOWRITE is non-zero, transfer them to the target,
4353 otherwise transfer them from the target. TARGET is unused.
4355 The return value is 0 if an error occurred or no bytes were
4356 transferred. Otherwise, it will be a positive value which
4357 indicates the number of bytes transferred between gdb and the
4358 target. (Note that the interface also makes provisions for
4359 negative values, but this capability isn't implemented here.) */
4362 procfs_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
, int dowrite
,
4363 struct mem_attrib
*attrib
, struct target_ops
*target
)
4368 /* Find procinfo for main process */
4369 pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0);
4370 if (pi
->as_fd
== 0 &&
4371 open_procinfo_files (pi
, FD_AS
) == 0)
4373 proc_warn (pi
, "xfer_memory, open_proc_files", __LINE__
);
4377 if (lseek (pi
->as_fd
, (off_t
) memaddr
, SEEK_SET
) == (off_t
) memaddr
)
4382 PROCFS_NOTE ("write memory: ");
4384 PROCFS_NOTE ("write memory: \n");
4386 nbytes
= write (pi
->as_fd
, myaddr
, len
);
4390 PROCFS_NOTE ("read memory: \n");
4391 nbytes
= read (pi
->as_fd
, myaddr
, len
);
4402 * Function: invalidate_cache
4404 * Called by target_resume before making child runnable.
4405 * Mark cached registers and status's invalid.
4406 * If there are "dirty" caches that need to be written back
4407 * to the child process, do that.
4409 * File descriptors are also cached.
4410 * As they are a limited resource, we cannot hold onto them indefinitely.
4411 * However, as they are expensive to open, we don't want to throw them
4412 * away indescriminately either. As a compromise, we will keep the
4413 * file descriptors for the parent process, but discard any file
4414 * descriptors we may have accumulated for the threads.
4417 * As this function is called by iterate_over_threads, it always
4418 * returns zero (so that iterate_over_threads will keep iterating).
4423 invalidate_cache (procinfo
*parent
, procinfo
*pi
, void *ptr
)
4426 * About to run the child; invalidate caches and do any other cleanup.
4430 if (pi
->gregs_dirty
)
4431 if (parent
== NULL
||
4432 proc_get_current_thread (parent
) != pi
->tid
)
4433 if (!proc_set_gregs (pi
)) /* flush gregs cache */
4434 proc_warn (pi
, "target_resume, set_gregs",
4436 if (FP0_REGNUM
>= 0)
4437 if (pi
->fpregs_dirty
)
4438 if (parent
== NULL
||
4439 proc_get_current_thread (parent
) != pi
->tid
)
4440 if (!proc_set_fpregs (pi
)) /* flush fpregs cache */
4441 proc_warn (pi
, "target_resume, set_fpregs",
4447 /* The presence of a parent indicates that this is an LWP.
4448 Close any file descriptors that it might have open.
4449 We don't do this to the master (parent) procinfo. */
4451 close_procinfo_files (pi
);
4453 pi
->gregs_valid
= 0;
4454 pi
->fpregs_valid
= 0;
4456 pi
->gregs_dirty
= 0;
4457 pi
->fpregs_dirty
= 0;
4459 pi
->status_valid
= 0;
4460 pi
->threads_valid
= 0;
4467 * Function: make_signal_thread_runnable
4469 * A callback function for iterate_over_threads.
4470 * Find the asynchronous signal thread, and make it runnable.
4471 * See if that helps matters any.
4475 make_signal_thread_runnable (procinfo
*process
, procinfo
*pi
, void *ptr
)
4478 if (proc_flags (pi
) & PR_ASLWP
)
4480 if (!proc_run_process (pi
, 0, -1))
4481 proc_error (pi
, "make_signal_thread_runnable", __LINE__
);
4490 * Function: target_resume
4492 * Make the child process runnable. Normally we will then call
4493 * procfs_wait and wait for it to stop again (unles gdb is async).
4496 * step: if true, then arrange for the child to stop again
4497 * after executing a single instruction.
4498 * signo: if zero, then cancel any pending signal.
4499 * If non-zero, then arrange for the indicated signal
4500 * to be delivered to the child when it runs.
4501 * pid: if -1, then allow any child thread to run.
4502 * if non-zero, then allow only the indicated thread to run.
4503 ******* (not implemented yet)
4507 procfs_resume (ptid_t ptid
, int step
, enum target_signal signo
)
4509 procinfo
*pi
, *thread
;
4513 prrun.prflags |= PRSVADDR;
4514 prrun.pr_vaddr = $PC; set resume address
4515 prrun.prflags |= PRSTRACE; trace signals in pr_trace (all)
4516 prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE)
4517 prrun.prflags |= PRCFAULT; clear current fault.
4519 PRSTRACE and PRSFAULT can be done by other means
4520 (proc_trace_signals, proc_trace_faults)
4521 PRSVADDR is unnecessary.
4522 PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault)
4523 This basically leaves PRSTEP and PRCSIG.
4524 PRCSIG is like PIOCSSIG (proc_clear_current_signal).
4525 So basically PR_STEP is the sole argument that must be passed
4526 to proc_run_process (for use in the prrun struct by ioctl). */
4528 /* Find procinfo for main process */
4529 pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0);
4531 /* First cut: ignore pid argument */
4534 /* Convert signal to host numbering. */
4536 (signo
== TARGET_SIGNAL_STOP
&& pi
->ignore_next_sigstop
))
4539 native_signo
= target_signal_to_host (signo
);
4541 pi
->ignore_next_sigstop
= 0;
4543 /* Running the process voids all cached registers and status. */
4544 /* Void the threads' caches first */
4545 proc_iterate_over_threads (pi
, invalidate_cache
, NULL
);
4546 /* Void the process procinfo's caches. */
4547 invalidate_cache (NULL
, pi
, NULL
);
4549 if (PIDGET (ptid
) != -1)
4551 /* Resume a specific thread, presumably suppressing the others. */
4552 thread
= find_procinfo (PIDGET (ptid
), TIDGET (ptid
));
4555 if (thread
->tid
!= 0)
4557 /* We're to resume a specific thread, and not the others.
4558 * Set the child process's PR_ASYNC flag.
4561 if (!proc_set_async (pi
))
4562 proc_error (pi
, "target_resume, set_async", __LINE__
);
4565 proc_iterate_over_threads (pi
,
4566 make_signal_thread_runnable
,
4569 pi
= thread
; /* substitute the thread's procinfo for run */
4574 if (!proc_run_process (pi
, step
, native_signo
))
4577 warning ("resume: target already running. Pretend to resume, and hope for the best!\n");
4579 proc_error (pi
, "target_resume", __LINE__
);
4584 * Function: register_gdb_signals
4586 * Traverse the list of signals that GDB knows about
4587 * (see "handle" command), and arrange for the target
4588 * to be stopped or not, according to these settings.
4590 * Returns non-zero for success, zero for failure.
4594 register_gdb_signals (procinfo
*pi
, gdb_sigset_t
*signals
)
4598 for (signo
= 0; signo
< NSIG
; signo
++)
4599 if (signal_stop_state (target_signal_from_host (signo
)) == 0 &&
4600 signal_print_state (target_signal_from_host (signo
)) == 0 &&
4601 signal_pass_state (target_signal_from_host (signo
)) == 1)
4602 prdelset (signals
, signo
);
4604 praddset (signals
, signo
);
4606 return proc_set_traced_signals (pi
, signals
);
4610 * Function: target_notice_signals
4612 * Set up to trace signals in the child process.
4616 procfs_notice_signals (ptid_t ptid
)
4618 gdb_sigset_t signals
;
4619 procinfo
*pi
= find_procinfo_or_die (PIDGET (ptid
), 0);
4621 if (proc_get_traced_signals (pi
, &signals
) &&
4622 register_gdb_signals (pi
, &signals
))
4625 proc_error (pi
, "notice_signals", __LINE__
);
4629 * Function: target_files_info
4631 * Print status information about the child process.
4635 procfs_files_info (struct target_ops
*ignore
)
4637 printf_filtered ("\tUsing the running image of %s %s via /proc.\n",
4638 attach_flag
? "attached": "child",
4639 target_pid_to_str (inferior_ptid
));
4643 * Function: target_open
4645 * A dummy: you don't open procfs.
4649 procfs_open (char *args
, int from_tty
)
4651 error ("Use the \"run\" command to start a Unix child process.");
4655 * Function: target_can_run
4657 * This tells GDB that this target vector can be invoked
4658 * for "run" or "attach".
4661 int procfs_suppress_run
= 0; /* Non-zero if procfs should pretend not to
4662 be a runnable target. Used by targets
4663 that can sit atop procfs, such as solaris
4668 procfs_can_run (void)
4670 /* This variable is controlled by modules that sit atop procfs that
4671 may layer their own process structure atop that provided here.
4672 sol-thread.c does this because of the Solaris two-level thread
4675 /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */
4677 return !procfs_suppress_run
;
4681 * Function: target_stop
4683 * Stop the child process asynchronously, as when the
4684 * gdb user types control-c or presses a "stop" button.
4686 * Works by sending kill(SIGINT) to the child's process group.
4692 kill (-inferior_process_group
, SIGINT
);
4696 * Function: unconditionally_kill_inferior
4698 * Make it die. Wait for it to die. Clean up after it.
4699 * Note: this should only be applied to the real process,
4700 * not to an LWP, because of the check for parent-process.
4701 * If we need this to work for an LWP, it needs some more logic.
4705 unconditionally_kill_inferior (procinfo
*pi
)
4709 parent_pid
= proc_parent_pid (pi
);
4710 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
4711 /* FIXME: use access functions */
4712 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
4713 before the PIOCKILL, otherwise it might generate a corrupted core
4714 file for the inferior. */
4715 if (ioctl (pi
->ctl_fd
, PIOCSSIG
, NULL
) < 0)
4717 printf_filtered ("unconditionally_kill: SSIG failed!\n");
4720 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
4721 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
4722 to kill the inferior, otherwise it might remain stopped with a
4724 We do not check the result of the PIOCSSIG, the inferior might have
4727 gdb_siginfo_t newsiginfo
;
4729 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
4730 newsiginfo
.si_signo
= SIGKILL
;
4731 newsiginfo
.si_code
= 0;
4732 newsiginfo
.si_errno
= 0;
4733 newsiginfo
.si_pid
= getpid ();
4734 newsiginfo
.si_uid
= getuid ();
4735 /* FIXME: use proc_set_current_signal */
4736 ioctl (pi
->ctl_fd
, PIOCSSIG
, &newsiginfo
);
4738 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4739 if (!proc_kill (pi
, SIGKILL
))
4740 proc_error (pi
, "unconditionally_kill, proc_kill", __LINE__
);
4741 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4742 destroy_procinfo (pi
);
4744 /* If pi is GDB's child, wait for it to die. */
4745 if (parent_pid
== getpid ())
4746 /* FIXME: should we use waitpid to make sure we get the right event?
4747 Should we check the returned event? */
4752 ret
= waitpid (pi
->pid
, &status
, 0);
4760 * Function: target_kill_inferior
4762 * We're done debugging it, and we want it to go away.
4763 * Then we want GDB to forget all about it.
4767 procfs_kill_inferior (void)
4769 if (!ptid_equal (inferior_ptid
, null_ptid
)) /* ? */
4771 /* Find procinfo for main process */
4772 procinfo
*pi
= find_procinfo (PIDGET (inferior_ptid
), 0);
4775 unconditionally_kill_inferior (pi
);
4776 target_mourn_inferior ();
4781 * Function: target_mourn_inferior
4783 * Forget we ever debugged this thing!
4787 procfs_mourn_inferior (void)
4791 if (!ptid_equal (inferior_ptid
, null_ptid
))
4793 /* Find procinfo for main process */
4794 pi
= find_procinfo (PIDGET (inferior_ptid
), 0);
4796 destroy_procinfo (pi
);
4798 unpush_target (&procfs_ops
);
4799 generic_mourn_inferior ();
4803 * Function: init_inferior
4805 * When GDB forks to create a runnable inferior process,
4806 * this function is called on the parent side of the fork.
4807 * It's job is to do whatever is necessary to make the child
4808 * ready to be debugged, and then wait for the child to synchronize.
4812 procfs_init_inferior (int pid
)
4815 gdb_sigset_t signals
;
4818 /* This routine called on the parent side (GDB side)
4819 after GDB forks the inferior. */
4821 push_target (&procfs_ops
);
4823 if ((pi
= create_procinfo (pid
, 0)) == NULL
)
4824 perror ("procfs: out of memory in 'init_inferior'");
4826 if (!open_procinfo_files (pi
, FD_CTL
))
4827 proc_error (pi
, "init_inferior, open_proc_files", __LINE__
);
4831 open_procinfo_files // done
4834 procfs_notice_signals
4841 /* If not stopped yet, wait for it to stop. */
4842 if (!(proc_flags (pi
) & PR_STOPPED
) &&
4843 !(proc_wait_for_stop (pi
)))
4844 dead_procinfo (pi
, "init_inferior: wait_for_stop failed", KILL
);
4846 /* Save some of the /proc state to be restored if we detach. */
4847 /* FIXME: Why? In case another debugger was debugging it?
4848 We're it's parent, for Ghu's sake! */
4849 if (!proc_get_traced_signals (pi
, &pi
->saved_sigset
))
4850 proc_error (pi
, "init_inferior, get_traced_signals", __LINE__
);
4851 if (!proc_get_held_signals (pi
, &pi
->saved_sighold
))
4852 proc_error (pi
, "init_inferior, get_held_signals", __LINE__
);
4853 if (!proc_get_traced_faults (pi
, &pi
->saved_fltset
))
4854 proc_error (pi
, "init_inferior, get_traced_faults", __LINE__
);
4855 if (!proc_get_traced_sysentry (pi
, pi
->saved_entryset
))
4856 proc_error (pi
, "init_inferior, get_traced_sysentry", __LINE__
);
4857 if (!proc_get_traced_sysexit (pi
, pi
->saved_exitset
))
4858 proc_error (pi
, "init_inferior, get_traced_sysexit", __LINE__
);
4860 /* Register to trace selected signals in the child. */
4861 prfillset (&signals
);
4862 if (!register_gdb_signals (pi
, &signals
))
4863 proc_error (pi
, "init_inferior, register_signals", __LINE__
);
4865 if ((fail
= procfs_debug_inferior (pi
)) != 0)
4866 proc_error (pi
, "init_inferior (procfs_debug_inferior)", fail
);
4868 /* FIXME: logically, we should really be turning OFF run-on-last-close,
4869 and possibly even turning ON kill-on-last-close at this point. But
4870 I can't make that change without careful testing which I don't have
4871 time to do right now... */
4872 /* Turn on run-on-last-close flag so that the child
4873 will die if GDB goes away for some reason. */
4874 if (!proc_set_run_on_last_close (pi
))
4875 proc_error (pi
, "init_inferior, set_RLC", __LINE__
);
4877 /* The 'process ID' we return to GDB is composed of
4878 the actual process ID plus the lwp ID. */
4879 inferior_ptid
= MERGEPID (pi
->pid
, proc_get_current_thread (pi
));
4881 /* Typically two, one trap to exec the shell, one to exec the
4882 program being debugged. Defined by "inferior.h". */
4883 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
4886 /* On mips-irix, we need to stop the inferior early enough during
4887 the startup phase in order to be able to load the shared library
4888 symbols and insert the breakpoints that are located in these shared
4889 libraries. Stopping at the program entry point is not good enough
4890 because the -init code is executed before the execution reaches
4893 So what we need to do is to insert a breakpoint in the runtime
4894 loader (rld), more precisely in __dbx_link(). This procedure is
4895 called by rld once all shared libraries have been mapped, but before
4896 the -init code is executed. Unfortuantely, this is not straightforward,
4897 as rld is not part of the executable we are running, and thus we need
4898 the inferior to run until rld itself has been mapped in memory.
4900 For this, we trace all syssgi() syscall exit events. Each time
4901 we detect such an event, we iterate over each text memory maps,
4902 get its associated fd, and scan the symbol table for __dbx_link().
4903 When found, we know that rld has been mapped, and that we can insert
4904 the breakpoint at the symbol address. Once the dbx_link() breakpoint
4905 has been inserted, the syssgi() notifications are no longer necessary,
4906 so they should be canceled. */
4907 proc_trace_syscalls_1 (pi
, SYS_syssgi
, PR_SYSEXIT
, FLAG_SET
, 0);
4908 dbx_link_bpt_addr
= 0;
4913 * Function: set_exec_trap
4915 * When GDB forks to create a new process, this function is called
4916 * on the child side of the fork before GDB exec's the user program.
4917 * Its job is to make the child minimally debuggable, so that the
4918 * parent GDB process can connect to the child and take over.
4919 * This function should do only the minimum to make that possible,
4920 * and to synchronize with the parent process. The parent process
4921 * should take care of the details.
4925 procfs_set_exec_trap (void)
4927 /* This routine called on the child side (inferior side)
4928 after GDB forks the inferior. It must use only local variables,
4929 because it may be sharing data space with its parent. */
4934 if ((pi
= create_procinfo (getpid (), 0)) == NULL
)
4935 perror_with_name ("procfs: create_procinfo failed in child.");
4937 if (open_procinfo_files (pi
, FD_CTL
) == 0)
4939 proc_warn (pi
, "set_exec_trap, open_proc_files", __LINE__
);
4940 gdb_flush (gdb_stderr
);
4941 /* no need to call "dead_procinfo", because we're going to exit. */
4945 #ifdef PRFS_STOPEXEC /* defined on OSF */
4946 /* OSF method for tracing exec syscalls. Quoting:
4947 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
4948 exits from exec system calls because of the user level loader. */
4949 /* FIXME: make nice and maybe move into an access function. */
4953 if (ioctl (pi
->ctl_fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
4955 proc_warn (pi
, "set_exec_trap (PIOCGSPCACT)", __LINE__
);
4956 gdb_flush (gdb_stderr
);
4959 prfs_flags
|= PRFS_STOPEXEC
;
4961 if (ioctl (pi
->ctl_fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
4963 proc_warn (pi
, "set_exec_trap (PIOCSSPCACT)", __LINE__
);
4964 gdb_flush (gdb_stderr
);
4968 #else /* not PRFS_STOPEXEC */
4969 /* Everyone else's (except OSF) method for tracing exec syscalls */
4971 Not all systems with /proc have all the exec* syscalls with the same
4972 names. On the SGI, for example, there is no SYS_exec, but there
4973 *is* a SYS_execv. So, we try to account for that. */
4975 exitset
= sysset_t_alloc (pi
);
4976 gdb_premptysysset (exitset
);
4978 gdb_praddsysset (exitset
, SYS_exec
);
4981 gdb_praddsysset (exitset
, SYS_execve
);
4984 gdb_praddsysset (exitset
, SYS_execv
);
4986 #ifdef DYNAMIC_SYSCALLS
4988 int callnum
= find_syscall (pi
, "execve");
4991 gdb_praddsysset (exitset
, callnum
);
4993 callnum
= find_syscall (pi
, "ra_execve");
4995 gdb_praddsysset (exitset
, callnum
);
4997 #endif /* DYNAMIC_SYSCALLS */
4999 if (!proc_set_traced_sysexit (pi
, exitset
))
5001 proc_warn (pi
, "set_exec_trap, set_traced_sysexit", __LINE__
);
5002 gdb_flush (gdb_stderr
);
5005 #endif /* PRFS_STOPEXEC */
5007 /* FIXME: should this be done in the parent instead? */
5008 /* Turn off inherit on fork flag so that all grand-children
5009 of gdb start with tracing flags cleared. */
5010 if (!proc_unset_inherit_on_fork (pi
))
5011 proc_warn (pi
, "set_exec_trap, unset_inherit", __LINE__
);
5013 /* Turn off run on last close flag, so that the child process
5014 cannot run away just because we close our handle on it.
5015 We want it to wait for the parent to attach. */
5016 if (!proc_unset_run_on_last_close (pi
))
5017 proc_warn (pi
, "set_exec_trap, unset_RLC", __LINE__
);
5019 /* FIXME: No need to destroy the procinfo --
5020 we have our own address space, and we're about to do an exec! */
5021 /*destroy_procinfo (pi);*/
5025 * Function: create_inferior
5027 * This function is called BEFORE gdb forks the inferior process.
5028 * Its only real responsibility is to set things up for the fork,
5029 * and tell GDB which two functions to call after the fork (one
5030 * for the parent, and one for the child).
5032 * This function does a complicated search for a unix shell program,
5033 * which it then uses to parse arguments and environment variables
5034 * to be sent to the child. I wonder whether this code could not
5035 * be abstracted out and shared with other unix targets such as
5040 procfs_create_inferior (char *exec_file
, char *allargs
, char **env
,
5043 char *shell_file
= getenv ("SHELL");
5045 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
5048 /* We will be looking down the PATH to find shell_file. If we
5049 just do this the normal way (via execlp, which operates by
5050 attempting an exec for each element of the PATH until it
5051 finds one which succeeds), then there will be an exec for
5052 each failed attempt, each of which will cause a PR_SYSEXIT
5053 stop, and we won't know how to distinguish the PR_SYSEXIT's
5054 for these failed execs with the ones for successful execs
5055 (whether the exec has succeeded is stored at that time in the
5056 carry bit or some such architecture-specific and
5057 non-ABI-specified place).
5059 So I can't think of anything better than to search the PATH
5060 now. This has several disadvantages: (1) There is a race
5061 condition; if we find a file now and it is deleted before we
5062 exec it, we lose, even if the deletion leaves a valid file
5063 further down in the PATH, (2) there is no way to know exactly
5064 what an executable (in the sense of "capable of being
5065 exec'd") file is. Using access() loses because it may lose
5066 if the caller is the superuser; failing to use it loses if
5067 there are ACLs or some such. */
5071 /* FIXME-maybe: might want "set path" command so user can change what
5072 path is used from within GDB. */
5073 char *path
= getenv ("PATH");
5075 struct stat statbuf
;
5078 path
= "/bin:/usr/bin";
5080 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
5081 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1: NULL
)
5083 p1
= strchr (p
, ':');
5088 strncpy (tryname
, p
, len
);
5089 tryname
[len
] = '\0';
5090 strcat (tryname
, "/");
5091 strcat (tryname
, shell_file
);
5092 if (access (tryname
, X_OK
) < 0)
5094 if (stat (tryname
, &statbuf
) < 0)
5096 if (!S_ISREG (statbuf
.st_mode
))
5097 /* We certainly need to reject directories. I'm not quite
5098 as sure about FIFOs, sockets, etc., but I kind of doubt
5099 that people want to exec() these things. */
5104 /* Not found. This must be an error rather than merely passing
5105 the file to execlp(), because execlp() would try all the
5106 exec()s, causing GDB to get confused. */
5107 error ("procfs:%d -- Can't find shell %s in PATH",
5108 __LINE__
, shell_file
);
5110 shell_file
= tryname
;
5113 fork_inferior (exec_file
, allargs
, env
, procfs_set_exec_trap
,
5114 procfs_init_inferior
, NULL
, shell_file
);
5117 /* Make sure to cancel the syssgi() syscall-exit notifications.
5118 They should normally have been removed by now, but they may still
5119 be activated if the inferior doesn't use shared libraries, or if
5120 we didn't locate __dbx_link, or if we never stopped in __dbx_link.
5121 See procfs_init_inferior() for more details. */
5122 proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid
), 0),
5123 SYS_syssgi
, PR_SYSEXIT
, FLAG_RESET
, 0);
5126 /* We are at the first instruction we care about. */
5127 /* Pedal to the metal... */
5129 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
5133 * Function: notice_thread
5135 * Callback for find_new_threads.
5136 * Calls "add_thread".
5140 procfs_notice_thread (procinfo
*pi
, procinfo
*thread
, void *ptr
)
5142 ptid_t gdb_threadid
= MERGEPID (pi
->pid
, thread
->tid
);
5144 if (!in_thread_list (gdb_threadid
))
5145 add_thread (gdb_threadid
);
5151 * Function: target_find_new_threads
5153 * Query all the threads that the target knows about,
5154 * and give them back to GDB to add to its list.
5158 procfs_find_new_threads (void)
5162 /* Find procinfo for main process */
5163 pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0);
5164 proc_update_threads (pi
);
5165 proc_iterate_over_threads (pi
, procfs_notice_thread
, NULL
);
5169 * Function: target_thread_alive
5171 * Return true if the thread is still 'alive'.
5173 * This guy doesn't really seem to be doing his job.
5174 * Got to investigate how to tell when a thread is really gone.
5178 procfs_thread_alive (ptid_t ptid
)
5183 proc
= PIDGET (ptid
);
5184 thread
= TIDGET (ptid
);
5185 /* If I don't know it, it ain't alive! */
5186 if ((pi
= find_procinfo (proc
, thread
)) == NULL
)
5189 /* If I can't get its status, it ain't alive!
5190 What's more, I need to forget about it! */
5191 if (!proc_get_status (pi
))
5193 destroy_procinfo (pi
);
5196 /* I couldn't have got its status if it weren't alive, so it's alive. */
5200 /* Convert PTID to a string. Returns the string in a static buffer. */
5203 procfs_pid_to_str (ptid_t ptid
)
5205 static char buf
[80];
5207 if (TIDGET (ptid
) == 0)
5208 sprintf (buf
, "process %d", PIDGET (ptid
));
5210 sprintf (buf
, "LWP %ld", TIDGET (ptid
));
5216 * Function: procfs_set_watchpoint
5217 * Insert a watchpoint
5221 procfs_set_watchpoint (ptid_t ptid
, CORE_ADDR addr
, int len
, int rwflag
,
5229 pi
= find_procinfo_or_die (PIDGET (ptid
) == -1 ?
5230 PIDGET (inferior_ptid
) : PIDGET (ptid
), 0);
5232 /* Translate from GDB's flags to /proc's */
5233 if (len
> 0) /* len == 0 means delete watchpoint */
5235 switch (rwflag
) { /* FIXME: need an enum! */
5236 case hw_write
: /* default watchpoint (write) */
5237 pflags
= WRITE_WATCHFLAG
;
5239 case hw_read
: /* read watchpoint */
5240 pflags
= READ_WATCHFLAG
;
5242 case hw_access
: /* access watchpoint */
5243 pflags
= READ_WATCHFLAG
| WRITE_WATCHFLAG
;
5245 case hw_execute
: /* execution HW breakpoint */
5246 pflags
= EXEC_WATCHFLAG
;
5248 default: /* Something weird. Return error. */
5251 if (after
) /* Stop after r/w access is completed. */
5252 pflags
|= AFTER_WATCHFLAG
;
5255 if (!proc_set_watchpoint (pi
, addr
, len
, pflags
))
5257 if (errno
== E2BIG
) /* Typical error for no resources */
5258 return -1; /* fail */
5259 /* GDB may try to remove the same watchpoint twice.
5260 If a remove request returns no match, don't error. */
5261 if (errno
== ESRCH
&& len
== 0)
5262 return 0; /* ignore */
5263 proc_error (pi
, "set_watchpoint", __LINE__
);
5266 #endif /* UNIXWARE */
5270 /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE
5271 is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint,
5272 or bp_hardware_watchpoint. CNT is the number of watchpoints used so
5275 Note: procfs_can_use_hw_breakpoint() is not yet used by all
5276 procfs.c targets due to the fact that some of them still define
5277 TARGET_CAN_USE_HARDWARE_WATCHPOINT. */
5280 procfs_can_use_hw_breakpoint (int type
, int cnt
, int othertype
)
5282 #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS
5285 /* Due to the way that proc_set_watchpoint() is implemented, host
5286 and target pointers must be of the same size. If they are not,
5287 we can't use hardware watchpoints. This limitation is due to the
5288 fact that proc_set_watchpoint() calls
5289 procfs_address_to_host_pointer(); a close inspection of
5290 procfs_address_to_host_pointer will reveal that an internal error
5291 will be generated when the host and target pointer sizes are
5293 if (sizeof (void *) != TYPE_LENGTH (builtin_type_void_data_ptr
))
5296 /* Other tests here??? */
5303 * Function: stopped_by_watchpoint
5305 * Returns non-zero if process is stopped on a hardware watchpoint fault,
5306 * else returns zero.
5310 procfs_stopped_by_watchpoint (ptid_t ptid
)
5314 pi
= find_procinfo_or_die (PIDGET (ptid
) == -1 ?
5315 PIDGET (inferior_ptid
) : PIDGET (ptid
), 0);
5317 if (!pi
) /* If no process, then not stopped by watchpoint! */
5320 if (proc_flags (pi
) & (PR_STOPPED
| PR_ISTOP
))
5322 if (proc_why (pi
) == PR_FAULTED
)
5325 if (proc_what (pi
) == FLTWATCH
)
5329 if (proc_what (pi
) == FLTKWATCH
)
5337 #ifdef TM_I386SOL2_H
5339 * Function: procfs_find_LDT_entry
5342 * ptid_t ptid; // The GDB-style pid-plus-LWP.
5345 * pointer to the corresponding LDT entry.
5349 procfs_find_LDT_entry (ptid_t ptid
)
5351 gdb_gregset_t
*gregs
;
5355 /* Find procinfo for the lwp. */
5356 if ((pi
= find_procinfo (PIDGET (ptid
), TIDGET (ptid
))) == NULL
)
5358 warning ("procfs_find_LDT_entry: could not find procinfo for %d:%d.",
5359 PIDGET (ptid
), TIDGET (ptid
));
5362 /* get its general registers. */
5363 if ((gregs
= proc_get_gregs (pi
)) == NULL
)
5365 warning ("procfs_find_LDT_entry: could not read gregs for %d:%d.",
5366 PIDGET (ptid
), TIDGET (ptid
));
5369 /* Now extract the GS register's lower 16 bits. */
5370 key
= (*gregs
)[GS
] & 0xffff;
5372 /* Find the matching entry and return it. */
5373 return proc_get_LDT_entry (pi
, key
);
5375 #endif /* TM_I386SOL2_H */
5378 * Memory Mappings Functions:
5382 * Function: iterate_over_mappings
5384 * Call a callback function once for each mapping, passing it the mapping,
5385 * an optional secondary callback function, and some optional opaque data.
5386 * Quit and return the first non-zero value returned from the callback.
5389 * pi -- procinfo struct for the process to be mapped.
5390 * func -- callback function to be called by this iterator.
5391 * data -- optional opaque data to be passed to the callback function.
5392 * child_func -- optional secondary function pointer to be passed
5393 * to the child function.
5395 * Return: First non-zero return value from the callback function,
5400 iterate_over_mappings (procinfo
*pi
, int (*child_func
) (), void *data
,
5401 int (*func
) (struct prmap
*map
,
5402 int (*child_func
) (),
5405 char pathname
[MAX_PROC_NAME_SIZE
];
5406 struct prmap
*prmaps
;
5407 struct prmap
*prmap
;
5415 /* Get the number of mappings, allocate space,
5416 and read the mappings into prmaps. */
5419 sprintf (pathname
, "/proc/%d/map", pi
->pid
);
5420 if ((map_fd
= open (pathname
, O_RDONLY
)) < 0)
5421 proc_error (pi
, "iterate_over_mappings (open)", __LINE__
);
5423 /* Make sure it gets closed again. */
5424 make_cleanup_close (map_fd
);
5426 /* Use stat to determine the file size, and compute
5427 the number of prmap_t objects it contains. */
5428 if (fstat (map_fd
, &sbuf
) != 0)
5429 proc_error (pi
, "iterate_over_mappings (fstat)", __LINE__
);
5431 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
5432 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
5433 if (read (map_fd
, (char *) prmaps
, nmap
* sizeof (*prmaps
))
5434 != (nmap
* sizeof (*prmaps
)))
5435 proc_error (pi
, "iterate_over_mappings (read)", __LINE__
);
5437 /* Use ioctl command PIOCNMAP to get number of mappings. */
5438 if (ioctl (pi
->ctl_fd
, PIOCNMAP
, &nmap
) != 0)
5439 proc_error (pi
, "iterate_over_mappings (PIOCNMAP)", __LINE__
);
5441 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
5442 if (ioctl (pi
->ctl_fd
, PIOCMAP
, prmaps
) != 0)
5443 proc_error (pi
, "iterate_over_mappings (PIOCMAP)", __LINE__
);
5446 for (prmap
= prmaps
; nmap
> 0; prmap
++, nmap
--)
5447 if ((funcstat
= (*func
) (prmap
, child_func
, data
)) != 0)
5454 * Function: solib_mappings_callback
5456 * Calls the supplied callback function once for each mapped address
5457 * space in the process. The callback function receives an open
5458 * file descriptor for the file corresponding to that mapped
5459 * address space (if there is one), and the base address of the
5460 * mapped space. Quit when the callback function returns a
5461 * nonzero value, or at teh end of the mappings.
5463 * Returns: the first non-zero return value of the callback function,
5467 int solib_mappings_callback (struct prmap
*map
,
5468 int (*func
) (int, CORE_ADDR
),
5471 procinfo
*pi
= data
;
5475 char name
[MAX_PROC_NAME_SIZE
+ sizeof (map
->pr_mapname
)];
5477 if (map
->pr_vaddr
== 0 && map
->pr_size
== 0)
5478 return -1; /* sanity */
5480 if (map
->pr_mapname
[0] == 0)
5482 fd
= -1; /* no map file */
5486 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, map
->pr_mapname
);
5487 /* Note: caller's responsibility to close this fd! */
5488 fd
= open_with_retry (name
, O_RDONLY
);
5489 /* Note: we don't test the above call for failure;
5490 we just pass the FD on as given. Sometimes there is
5491 no file, so the open may return failure, but that's
5495 fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, &map
->pr_vaddr
);
5496 /* Note: we don't test the above call for failure;
5497 we just pass the FD on as given. Sometimes there is
5498 no file, so the ioctl may return failure, but that's
5501 return (*func
) (fd
, (CORE_ADDR
) map
->pr_vaddr
);
5505 * Function: proc_iterate_over_mappings
5507 * Uses the unified "iterate_over_mappings" function
5508 * to implement the exported interface to solib-svr4.c.
5510 * Given a pointer to a function, call that function once for every
5511 * mapped address space in the process. The callback function
5512 * receives an open file descriptor for the file corresponding to
5513 * that mapped address space (if there is one), and the base address
5514 * of the mapped space. Quit when the callback function returns a
5515 * nonzero value, or at teh end of the mappings.
5517 * Returns: the first non-zero return value of the callback function,
5522 proc_iterate_over_mappings (int (*func
) (int, CORE_ADDR
))
5524 procinfo
*pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0);
5526 return iterate_over_mappings (pi
, func
, pi
, solib_mappings_callback
);
5530 * Function: find_memory_regions_callback
5532 * Implements the to_find_memory_regions method.
5533 * Calls an external function for each memory region.
5534 * External function will have the signiture:
5536 * int callback (CORE_ADDR vaddr,
5537 * unsigned long size,
5538 * int read, int write, int execute,
5541 * Returns the integer value returned by the callback.
5545 find_memory_regions_callback (struct prmap
*map
,
5546 int (*func
) (CORE_ADDR
,
5552 return (*func
) ((CORE_ADDR
) map
->pr_vaddr
,
5554 (map
->pr_mflags
& MA_READ
) != 0,
5555 (map
->pr_mflags
& MA_WRITE
) != 0,
5556 (map
->pr_mflags
& MA_EXEC
) != 0,
5561 * Function: proc_find_memory_regions
5563 * External interface. Calls a callback function once for each
5564 * mapped memory region in the child process, passing as arguments
5565 * CORE_ADDR virtual_address,
5566 * unsigned long size,
5567 * int read, TRUE if region is readable by the child
5568 * int write, TRUE if region is writable by the child
5569 * int execute TRUE if region is executable by the child.
5571 * Stops iterating and returns the first non-zero value
5572 * returned by the callback.
5576 proc_find_memory_regions (int (*func
) (CORE_ADDR
,
5582 procinfo
*pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0);
5584 return iterate_over_mappings (pi
, func
, data
,
5585 find_memory_regions_callback
);
5588 /* Remove the breakpoint that we inserted in __dbx_link().
5589 Does nothing if the breakpoint hasn't been inserted or has already
5593 remove_dbx_link_breakpoint (void)
5595 if (dbx_link_bpt_addr
== 0)
5598 if (memory_remove_breakpoint (dbx_link_bpt_addr
,
5599 dbx_link_shadow_contents
) != 0)
5600 warning ("Unable to remove __dbx_link breakpoint.");
5602 dbx_link_bpt_addr
= 0;
5605 /* Return the address of the __dbx_link() function in the file
5606 refernced by ABFD by scanning its symbol table. Return 0 if
5607 the symbol was not found. */
5610 dbx_link_addr (bfd
*abfd
)
5612 long storage_needed
;
5613 asymbol
**symbol_table
;
5614 long number_of_symbols
;
5617 storage_needed
= bfd_get_symtab_upper_bound (abfd
);
5618 if (storage_needed
<= 0)
5621 symbol_table
= (asymbol
**) xmalloc (storage_needed
);
5622 make_cleanup (xfree
, symbol_table
);
5624 number_of_symbols
= bfd_canonicalize_symtab (abfd
, symbol_table
);
5626 for (i
= 0; i
< number_of_symbols
; i
++)
5628 asymbol
*sym
= symbol_table
[i
];
5630 if ((sym
->flags
& BSF_GLOBAL
)
5631 && sym
->name
!= NULL
&& strcmp (sym
->name
, "__dbx_link") == 0)
5632 return (sym
->value
+ sym
->section
->vma
);
5635 /* Symbol not found, return NULL. */
5639 /* Search the symbol table of the file referenced by FD for a symbol
5640 named __dbx_link(). If found, then insert a breakpoint at this location,
5641 and return nonzero. Return zero otherwise. */
5644 insert_dbx_link_bpt_in_file (int fd
, CORE_ADDR ignored
)
5647 long storage_needed
;
5650 abfd
= bfd_fdopenr ("unamed", 0, fd
);
5653 warning ("Failed to create a bfd: %s.\n", bfd_errmsg (bfd_get_error ()));
5657 if (!bfd_check_format (abfd
, bfd_object
))
5659 /* Not the correct format, so we can not possibly find the dbx_link
5665 sym_addr
= dbx_link_addr (abfd
);
5668 /* Insert the breakpoint. */
5669 dbx_link_bpt_addr
= sym_addr
;
5670 if (target_insert_breakpoint (sym_addr
, dbx_link_shadow_contents
) != 0)
5672 warning ("Failed to insert dbx_link breakpoint.");
5684 /* If the given memory region MAP contains a symbol named __dbx_link,
5685 insert a breakpoint at this location and return nonzero. Return
5689 insert_dbx_link_bpt_in_region (struct prmap
*map
,
5690 int (*child_func
) (),
5693 procinfo
*pi
= (procinfo
*) data
;
5695 /* We know the symbol we're looking for is in a text region, so
5696 only look for it if the region is a text one. */
5697 if (map
->pr_mflags
& MA_EXEC
)
5698 return solib_mappings_callback (map
, insert_dbx_link_bpt_in_file
, pi
);
5703 /* Search all memory regions for a symbol named __dbx_link. If found,
5704 insert a breakpoint at its location, and return nonzero. Return zero
5708 insert_dbx_link_breakpoint (procinfo
*pi
)
5710 return iterate_over_mappings (pi
, NULL
, pi
, insert_dbx_link_bpt_in_region
);
5714 * Function: mappingflags
5716 * Returns an ascii representation of a memory mapping's flags.
5720 mappingflags (long flags
)
5722 static char asciiflags
[8];
5724 strcpy (asciiflags
, "-------");
5725 #if defined (MA_PHYS)
5726 if (flags
& MA_PHYS
)
5727 asciiflags
[0] = 'd';
5729 if (flags
& MA_STACK
)
5730 asciiflags
[1] = 's';
5731 if (flags
& MA_BREAK
)
5732 asciiflags
[2] = 'b';
5733 if (flags
& MA_SHARED
)
5734 asciiflags
[3] = 's';
5735 if (flags
& MA_READ
)
5736 asciiflags
[4] = 'r';
5737 if (flags
& MA_WRITE
)
5738 asciiflags
[5] = 'w';
5739 if (flags
& MA_EXEC
)
5740 asciiflags
[6] = 'x';
5741 return (asciiflags
);
5745 * Function: info_mappings_callback
5747 * Callback function, does the actual work for 'info proc mappings'.
5751 info_mappings_callback (struct prmap
*map
, int (*ignore
) (), void *unused
)
5753 char *data_fmt_string
;
5755 if (TARGET_ADDR_BIT
== 32)
5756 data_fmt_string
= "\t%#10lx %#10lx %#10x %#10x %7s\n";
5758 data_fmt_string
= " %#18lx %#18lx %#10x %#10x %7s\n";
5760 printf_filtered (data_fmt_string
,
5761 (unsigned long) map
->pr_vaddr
,
5762 (unsigned long) map
->pr_vaddr
+ map
->pr_size
- 1,
5764 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
5765 (unsigned int) map
->pr_offset
,
5769 mappingflags (map
->pr_mflags
));
5775 * Function: info_proc_mappings
5777 * Implement the "info proc mappings" subcommand.
5781 info_proc_mappings (procinfo
*pi
, int summary
)
5783 char *header_fmt_string
;
5785 if (TARGET_PTR_BIT
== 32)
5786 header_fmt_string
= "\t%10s %10s %10s %10s %7s\n";
5788 header_fmt_string
= " %18s %18s %10s %10s %7s\n";
5791 return; /* No output for summary mode. */
5793 printf_filtered ("Mapped address spaces:\n\n");
5794 printf_filtered (header_fmt_string
,
5801 iterate_over_mappings (pi
, NULL
, NULL
, info_mappings_callback
);
5802 printf_filtered ("\n");
5806 * Function: info_proc_cmd
5808 * Implement the "info proc" command.
5812 info_proc_cmd (char *args
, int from_tty
)
5814 struct cleanup
*old_chain
;
5815 procinfo
*process
= NULL
;
5816 procinfo
*thread
= NULL
;
5823 old_chain
= make_cleanup (null_cleanup
, 0);
5826 if ((argv
= buildargv (args
)) == NULL
)
5829 make_cleanup_freeargv (argv
);
5831 while (argv
!= NULL
&& *argv
!= NULL
)
5833 if (isdigit (argv
[0][0]))
5835 pid
= strtoul (argv
[0], &tmp
, 10);
5837 tid
= strtoul (++tmp
, NULL
, 10);
5839 else if (argv
[0][0] == '/')
5841 tid
= strtoul (argv
[0] + 1, NULL
, 10);
5843 else if (strncmp (argv
[0], "mappings", strlen (argv
[0])) == 0)
5854 pid
= PIDGET (inferior_ptid
);
5856 error ("No current process: you must name one.");
5859 /* Have pid, will travel.
5860 First see if it's a process we're already debugging. */
5861 process
= find_procinfo (pid
, 0);
5862 if (process
== NULL
)
5864 /* No. So open a procinfo for it, but
5865 remember to close it again when finished. */
5866 process
= create_procinfo (pid
, 0);
5867 make_cleanup (do_destroy_procinfo_cleanup
, process
);
5868 if (!open_procinfo_files (process
, FD_CTL
))
5869 proc_error (process
, "info proc, open_procinfo_files", __LINE__
);
5873 thread
= create_procinfo (pid
, tid
);
5877 printf_filtered ("process %d flags:\n", process
->pid
);
5878 proc_prettyprint_flags (proc_flags (process
), 1);
5879 if (proc_flags (process
) & (PR_STOPPED
| PR_ISTOP
))
5880 proc_prettyprint_why (proc_why (process
), proc_what (process
), 1);
5881 if (proc_get_nthreads (process
) > 1)
5882 printf_filtered ("Process has %d threads.\n",
5883 proc_get_nthreads (process
));
5887 printf_filtered ("thread %d flags:\n", thread
->tid
);
5888 proc_prettyprint_flags (proc_flags (thread
), 1);
5889 if (proc_flags (thread
) & (PR_STOPPED
| PR_ISTOP
))
5890 proc_prettyprint_why (proc_why (thread
), proc_what (thread
), 1);
5895 info_proc_mappings (process
, 0);
5898 do_cleanups (old_chain
);
5901 /* Modify the status of the system call identified by SYSCALLNUM in
5902 the set of syscalls that are currently traced/debugged.
5904 If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set
5905 will be updated. Otherwise, the exit syscalls set will be updated.
5907 If MODE is FLAG_SET, then traces will be enabled. Otherwise, they
5908 will be disabled. */
5911 proc_trace_syscalls_1 (procinfo
*pi
, int syscallnum
, int entry_or_exit
,
5912 int mode
, int from_tty
)
5916 if (entry_or_exit
== PR_SYSENTRY
)
5917 sysset
= proc_get_traced_sysentry (pi
, NULL
);
5919 sysset
= proc_get_traced_sysexit (pi
, NULL
);
5922 proc_error (pi
, "proc-trace, get_traced_sysset", __LINE__
);
5924 if (mode
== FLAG_SET
)
5925 gdb_praddsysset (sysset
, syscallnum
);
5927 gdb_prdelsysset (sysset
, syscallnum
);
5929 if (entry_or_exit
== PR_SYSENTRY
)
5931 if (!proc_set_traced_sysentry (pi
, sysset
))
5932 proc_error (pi
, "proc-trace, set_traced_sysentry", __LINE__
);
5936 if (!proc_set_traced_sysexit (pi
, sysset
))
5937 proc_error (pi
, "proc-trace, set_traced_sysexit", __LINE__
);
5942 proc_trace_syscalls (char *args
, int from_tty
, int entry_or_exit
, int mode
)
5946 if (PIDGET (inferior_ptid
) <= 0)
5947 error ("you must be debugging a process to use this command.");
5949 if (args
== NULL
|| args
[0] == 0)
5950 error_no_arg ("system call to trace");
5952 pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0);
5953 if (isdigit (args
[0]))
5955 const int syscallnum
= atoi (args
);
5957 proc_trace_syscalls_1 (pi
, syscallnum
, entry_or_exit
, mode
, from_tty
);
5962 proc_trace_sysentry_cmd (char *args
, int from_tty
)
5964 proc_trace_syscalls (args
, from_tty
, PR_SYSENTRY
, FLAG_SET
);
5968 proc_trace_sysexit_cmd (char *args
, int from_tty
)
5970 proc_trace_syscalls (args
, from_tty
, PR_SYSEXIT
, FLAG_SET
);
5974 proc_untrace_sysentry_cmd (char *args
, int from_tty
)
5976 proc_trace_syscalls (args
, from_tty
, PR_SYSENTRY
, FLAG_RESET
);
5980 proc_untrace_sysexit_cmd (char *args
, int from_tty
)
5982 proc_trace_syscalls (args
, from_tty
, PR_SYSEXIT
, FLAG_RESET
);
5987 _initialize_procfs (void)
5990 add_target (&procfs_ops
);
5991 add_info ("proc", info_proc_cmd
,
5992 "Show /proc process information about any running process.\n\
5993 Specify process id, or use the program being debugged by default.\n\
5994 Specify keyword 'mappings' for detailed info on memory mappings.");
5995 add_com ("proc-trace-entry", no_class
, proc_trace_sysentry_cmd
,
5996 "Give a trace of entries into the syscall.");
5997 add_com ("proc-trace-exit", no_class
, proc_trace_sysexit_cmd
,
5998 "Give a trace of exits from the syscall.");
5999 add_com ("proc-untrace-entry", no_class
, proc_untrace_sysentry_cmd
,
6000 "Cancel a trace of entries into the syscall.");
6001 add_com ("proc-untrace-exit", no_class
, proc_untrace_sysexit_cmd
,
6002 "Cancel a trace of exits from the syscall.");
6005 /* =================== END, GDB "MODULE" =================== */
6009 /* miscellaneous stubs: */
6010 /* The following satisfy a few random symbols mostly created by */
6011 /* the solaris threads implementation, which I will chase down */
6015 * Return a pid for which we guarantee
6016 * we will be able to find a 'live' procinfo.
6020 procfs_first_available (void)
6022 return pid_to_ptid (procinfo_list
? procinfo_list
->pid
: -1);
6025 /* =================== GCORE .NOTE "MODULE" =================== */
6026 #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT)
6027 /* gcore only implemented on solaris and unixware (so far) */
6030 procfs_do_thread_registers (bfd
*obfd
, ptid_t ptid
,
6031 char *note_data
, int *note_size
)
6033 gdb_gregset_t gregs
;
6034 gdb_fpregset_t fpregs
;
6035 unsigned long merged_pid
;
6037 merged_pid
= TIDGET (ptid
) << 16 | PIDGET (ptid
);
6039 fill_gregset (&gregs
, -1);
6040 #if defined (UNIXWARE)
6041 note_data
= (char *) elfcore_write_lwpstatus (obfd
,
6048 note_data
= (char *) elfcore_write_prstatus (obfd
,
6055 fill_fpregset (&fpregs
, -1);
6056 note_data
= (char *) elfcore_write_prfpreg (obfd
,
6064 struct procfs_corefile_thread_data
{
6071 procfs_corefile_thread_callback (procinfo
*pi
, procinfo
*thread
, void *data
)
6073 struct procfs_corefile_thread_data
*args
= data
;
6075 if (pi
!= NULL
&& thread
->tid
!= 0)
6077 ptid_t saved_ptid
= inferior_ptid
;
6078 inferior_ptid
= MERGEPID (pi
->pid
, thread
->tid
);
6079 args
->note_data
= procfs_do_thread_registers (args
->obfd
, inferior_ptid
,
6082 inferior_ptid
= saved_ptid
;
6088 procfs_make_note_section (bfd
*obfd
, int *note_size
)
6090 struct cleanup
*old_chain
;
6091 gdb_gregset_t gregs
;
6092 gdb_fpregset_t fpregs
;
6093 char fname
[16] = {'\0'};
6094 char psargs
[80] = {'\0'};
6095 procinfo
*pi
= find_procinfo_or_die (PIDGET (inferior_ptid
), 0);
6096 char *note_data
= NULL
;
6098 struct procfs_corefile_thread_data thread_args
;
6102 if (get_exec_file (0))
6104 strncpy (fname
, strrchr (get_exec_file (0), '/') + 1, sizeof (fname
));
6105 strncpy (psargs
, get_exec_file (0),
6108 inf_args
= get_inferior_args ();
6109 if (inf_args
&& *inf_args
&&
6110 strlen (inf_args
) < ((int) sizeof (psargs
) - (int) strlen (psargs
)))
6112 strncat (psargs
, " ",
6113 sizeof (psargs
) - strlen (psargs
));
6114 strncat (psargs
, inf_args
,
6115 sizeof (psargs
) - strlen (psargs
));
6119 note_data
= (char *) elfcore_write_prpsinfo (obfd
,
6126 fill_gregset (&gregs
, -1);
6127 note_data
= elfcore_write_pstatus (obfd
, note_data
, note_size
,
6128 PIDGET (inferior_ptid
),
6129 stop_signal
, &gregs
);
6132 thread_args
.obfd
= obfd
;
6133 thread_args
.note_data
= note_data
;
6134 thread_args
.note_size
= note_size
;
6135 proc_iterate_over_threads (pi
, procfs_corefile_thread_callback
, &thread_args
);
6137 if (thread_args
.note_data
== note_data
)
6139 /* iterate_over_threads didn't come up with any threads;
6140 just use inferior_ptid. */
6141 note_data
= procfs_do_thread_registers (obfd
, inferior_ptid
,
6142 note_data
, note_size
);
6146 note_data
= thread_args
.note_data
;
6149 auxv_len
= target_auxv_read (¤t_target
, &auxv
);
6152 note_data
= elfcore_write_note (obfd
, note_data
, note_size
,
6153 "CORE", NT_AUXV
, auxv
, auxv_len
);
6157 make_cleanup (xfree
, note_data
);
6160 #else /* !(Solaris or Unixware) */
6162 procfs_make_note_section (bfd
*obfd
, int *note_size
)
6164 error ("gcore not implemented for this host.");
6165 return NULL
; /* lint */
6167 #endif /* Solaris or Unixware */
6168 /* =================== END GCORE .NOTE "MODULE" =================== */