1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
3 Copyright (C) 1999-2015 Free Software Foundation, Inc.
5 Written by Michael Snyder at Cygnus Solutions.
6 Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 #include "elf-bfd.h" /* for elfcore_write_* */
30 #include "gdbthread.h"
32 #include "inf-child.h"
33 #include "filestuff.h"
35 #if defined (NEW_PROC_API)
36 #define _STRUCTURED_PROC 1 /* Should be done by configure script. */
39 #include <sys/procfs.h>
40 #ifdef HAVE_SYS_FAULT_H
41 #include <sys/fault.h>
43 #ifdef HAVE_SYS_SYSCALL_H
44 #include <sys/syscall.h>
55 /* This module provides the interface between GDB and the
56 /proc file system, which is used on many versions of Unix
57 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 perform
68 operations on that "file" in order to examine or change the state
71 The most important thing to know about /proc and this module is
72 that there are two very different interfaces to /proc:
74 One that uses the ioctl system call, and another that uses read
75 and write system calls.
77 This module has to support both /proc interfaces. This means that
78 there are two different ways of doing every basic operation.
80 In order to keep most of the code simple and clean, I have defined
81 an interface "layer" which hides all these system calls. An ifdef
82 (NEW_PROC_API) determines which interface we are using, and most or
83 all occurrances of this ifdef should be confined to this interface
86 /* Determine which /proc API we are using: The ioctl API defines
87 PIOCSTATUS, while the read/write (multiple fd) API never does. */
90 #include <sys/types.h>
91 #include <dirent.h> /* opendir/readdir, for listing the LWP's */
94 #include <fcntl.h> /* for O_RDONLY */
95 #include <unistd.h> /* for "X_OK" */
96 #include <sys/stat.h> /* for struct stat */
98 /* Note: procfs-utils.h must be included after the above system header
99 files, because it redefines various system calls using macros.
100 This may be incompatible with the prototype declarations. */
102 #include "proc-utils.h"
104 /* Prototypes for supply_gregset etc. */
107 /* =================== TARGET_OPS "MODULE" =================== */
109 /* This module defines the GDB target vector and its methods. */
111 static void procfs_attach (struct target_ops
*, const char *, int);
112 static void procfs_detach (struct target_ops
*, const char *, int);
113 static void procfs_resume (struct target_ops
*,
114 ptid_t
, int, enum gdb_signal
);
115 static void procfs_interrupt (struct target_ops
*self
, ptid_t
);
116 static void procfs_files_info (struct target_ops
*);
117 static void procfs_fetch_registers (struct target_ops
*,
118 struct regcache
*, int);
119 static void procfs_store_registers (struct target_ops
*,
120 struct regcache
*, int);
121 static void procfs_pass_signals (struct target_ops
*self
,
122 int, unsigned char *);
123 static void procfs_kill_inferior (struct target_ops
*ops
);
124 static void procfs_mourn_inferior (struct target_ops
*ops
);
125 static void procfs_create_inferior (struct target_ops
*, char *,
126 char *, char **, int);
127 static ptid_t
procfs_wait (struct target_ops
*,
128 ptid_t
, struct target_waitstatus
*, int);
129 static enum target_xfer_status
procfs_xfer_memory (gdb_byte
*,
133 static target_xfer_partial_ftype procfs_xfer_partial
;
135 static int procfs_thread_alive (struct target_ops
*ops
, ptid_t
);
137 static void procfs_update_thread_list (struct target_ops
*ops
);
138 static char *procfs_pid_to_str (struct target_ops
*, ptid_t
);
140 static int proc_find_memory_regions (struct target_ops
*self
,
141 find_memory_region_ftype
, void *);
143 static char * procfs_make_note_section (struct target_ops
*self
,
146 static int procfs_can_use_hw_breakpoint (struct target_ops
*self
,
147 enum bptype
, int, int);
149 static void procfs_info_proc (struct target_ops
*, const char *,
150 enum info_proc_what
);
152 #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64)
153 /* When GDB is built as 64-bit application on Solaris, the auxv data
154 is presented in 64-bit format. We need to provide a custom parser
157 procfs_auxv_parse (struct target_ops
*ops
, gdb_byte
**readptr
,
158 gdb_byte
*endptr
, CORE_ADDR
*typep
, CORE_ADDR
*valp
)
160 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch ());
161 gdb_byte
*ptr
= *readptr
;
166 if (endptr
- ptr
< 8 * 2)
169 *typep
= extract_unsigned_integer (ptr
, 4, byte_order
);
171 /* The size of data is always 64-bit. If the application is 32-bit,
172 it will be zero extended, as expected. */
173 *valp
= extract_unsigned_integer (ptr
, 8, byte_order
);
184 struct target_ops
*t
= inf_child_target ();
186 t
->to_create_inferior
= procfs_create_inferior
;
187 t
->to_kill
= procfs_kill_inferior
;
188 t
->to_mourn_inferior
= procfs_mourn_inferior
;
189 t
->to_attach
= procfs_attach
;
190 t
->to_detach
= procfs_detach
;
191 t
->to_wait
= procfs_wait
;
192 t
->to_resume
= procfs_resume
;
193 t
->to_fetch_registers
= procfs_fetch_registers
;
194 t
->to_store_registers
= procfs_store_registers
;
195 t
->to_xfer_partial
= procfs_xfer_partial
;
196 t
->to_pass_signals
= procfs_pass_signals
;
197 t
->to_files_info
= procfs_files_info
;
198 t
->to_interrupt
= procfs_interrupt
;
200 t
->to_update_thread_list
= procfs_update_thread_list
;
201 t
->to_thread_alive
= procfs_thread_alive
;
202 t
->to_pid_to_str
= procfs_pid_to_str
;
204 t
->to_has_thread_control
= tc_schedlock
;
205 t
->to_find_memory_regions
= proc_find_memory_regions
;
206 t
->to_make_corefile_notes
= procfs_make_note_section
;
207 t
->to_info_proc
= procfs_info_proc
;
209 #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64)
210 t
->to_auxv_parse
= procfs_auxv_parse
;
213 t
->to_magic
= OPS_MAGIC
;
218 /* =================== END, TARGET_OPS "MODULE" =================== */
220 /* World Unification:
222 Put any typedefs, defines etc. here that are required for the
223 unification of code that handles different versions of /proc. */
225 #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */
227 enum { READ_WATCHFLAG
= WA_READ
,
228 WRITE_WATCHFLAG
= WA_WRITE
,
229 EXEC_WATCHFLAG
= WA_EXEC
,
230 AFTER_WATCHFLAG
= WA_TRAPAFTER
233 #else /* Irix method for watchpoints */
234 enum { READ_WATCHFLAG
= MA_READ
,
235 WRITE_WATCHFLAG
= MA_WRITE
,
236 EXEC_WATCHFLAG
= MA_EXEC
,
237 AFTER_WATCHFLAG
= 0 /* trapafter not implemented */
242 #ifdef HAVE_PR_SIGSET_T
243 typedef pr_sigset_t gdb_sigset_t
;
245 typedef sigset_t gdb_sigset_t
;
249 #ifdef HAVE_PR_SIGACTION64_T
250 typedef pr_sigaction64_t gdb_sigaction_t
;
252 typedef struct sigaction gdb_sigaction_t
;
256 #ifdef HAVE_PR_SIGINFO64_T
257 typedef pr_siginfo64_t gdb_siginfo_t
;
259 typedef siginfo_t gdb_siginfo_t
;
262 /* On mips-irix, praddset and prdelset are defined in such a way that
263 they return a value, which causes GCC to emit a -Wunused error
264 because the returned value is not used. Prevent this warning
265 by casting the return value to void. On sparc-solaris, this issue
266 does not exist because the definition of these macros already include
267 that cast to void. */
268 #define gdb_praddset(sp, flag) ((void) praddset (sp, flag))
269 #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag))
271 /* gdb_premptysysset */
273 #define gdb_premptysysset premptysysset
275 #define gdb_premptysysset premptyset
280 #define gdb_praddsysset praddsysset
282 #define gdb_praddsysset gdb_praddset
287 #define gdb_prdelsysset prdelsysset
289 #define gdb_prdelsysset gdb_prdelset
292 /* prissyssetmember */
293 #ifdef prissyssetmember
294 #define gdb_pr_issyssetmember prissyssetmember
296 #define gdb_pr_issyssetmember prismember
299 /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't
300 as intuitively descriptive as it could be, so we'll define
301 DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of
302 this writing, this feature is only found on AIX5 systems and
303 basically means that the set of syscalls is not fixed. I.e,
304 there's no nice table that one can #include to get all of the
305 syscall numbers. Instead, they're stored in /proc/PID/sysent
306 for each process. We are at least guaranteed that they won't
307 change over the lifetime of the process. But each process could
308 (in theory) have different syscall numbers. */
309 #ifdef HAVE_PRSYSENT_T
310 #define DYNAMIC_SYSCALLS
315 /* =================== STRUCT PROCINFO "MODULE" =================== */
317 /* FIXME: this comment will soon be out of date W.R.T. threads. */
319 /* The procinfo struct is a wrapper to hold all the state information
320 concerning a /proc process. There should be exactly one procinfo
321 for each process, and since GDB currently can debug only one
322 process at a time, that means there should be only one procinfo.
323 All of the LWP's of a process can be accessed indirectly thru the
324 single process procinfo.
326 However, against the day when GDB may debug more than one process,
327 this data structure is kept in a list (which for now will hold no
328 more than one member), and many functions will have a pointer to a
329 procinfo as an argument.
331 There will be a separate procinfo structure for use by the (not yet
332 implemented) "info proc" command, so that we can print useful
333 information about any random process without interfering with the
334 inferior's procinfo information. */
337 /* format strings for /proc paths */
338 # ifndef CTL_PROC_NAME_FMT
339 # define MAIN_PROC_NAME_FMT "/proc/%d"
340 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
341 # define AS_PROC_NAME_FMT "/proc/%d/as"
342 # define MAP_PROC_NAME_FMT "/proc/%d/map"
343 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
344 # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus")
346 /* the name of the proc status struct depends on the implementation */
347 typedef pstatus_t gdb_prstatus_t
;
348 typedef lwpstatus_t gdb_lwpstatus_t
;
349 #else /* ! NEW_PROC_API */
350 /* format strings for /proc paths */
351 # ifndef CTL_PROC_NAME_FMT
352 # define MAIN_PROC_NAME_FMT "/proc/%05d"
353 # define CTL_PROC_NAME_FMT "/proc/%05d"
354 # define AS_PROC_NAME_FMT "/proc/%05d"
355 # define MAP_PROC_NAME_FMT "/proc/%05d"
356 # define STATUS_PROC_NAME_FMT "/proc/%05d"
357 # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp")
359 /* The name of the proc status struct depends on the implementation. */
360 typedef prstatus_t gdb_prstatus_t
;
361 typedef prstatus_t gdb_lwpstatus_t
;
362 #endif /* NEW_PROC_API */
364 typedef struct procinfo
{
365 struct procinfo
*next
;
366 int pid
; /* Process ID */
367 int tid
; /* Thread/LWP id */
371 int ignore_next_sigstop
;
373 /* The following four fd fields may be identical, or may contain
374 several different fd's, depending on the version of /proc
375 (old ioctl or new read/write). */
377 int ctl_fd
; /* File descriptor for /proc control file */
379 /* The next three file descriptors are actually only needed in the
380 read/write, multiple-file-descriptor implemenation
381 (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the
382 code, we will use them uniformly by (in the case of the ioctl
383 single-file-descriptor implementation) filling them with copies
384 of the control fd. */
385 int status_fd
; /* File descriptor for /proc status file */
386 int as_fd
; /* File descriptor for /proc as file */
388 char pathname
[MAX_PROC_NAME_SIZE
]; /* Pathname to /proc entry */
390 fltset_t saved_fltset
; /* Saved traced hardware fault set */
391 gdb_sigset_t saved_sigset
; /* Saved traced signal set */
392 gdb_sigset_t saved_sighold
; /* Saved held signal set */
393 sysset_t
*saved_exitset
; /* Saved traced system call exit set */
394 sysset_t
*saved_entryset
; /* Saved traced system call entry set */
396 gdb_prstatus_t prstatus
; /* Current process status info */
399 gdb_fpregset_t fpregset
; /* Current floating point registers */
402 #ifdef DYNAMIC_SYSCALLS
403 int num_syscalls
; /* Total number of syscalls */
404 char **syscall_names
; /* Syscall number to name map */
407 struct procinfo
*thread_list
;
409 int status_valid
: 1;
411 int fpregs_valid
: 1;
412 int threads_valid
: 1;
415 static char errmsg
[128]; /* shared error msg buffer */
417 /* Function prototypes for procinfo module: */
419 static procinfo
*find_procinfo_or_die (int pid
, int tid
);
420 static procinfo
*find_procinfo (int pid
, int tid
);
421 static procinfo
*create_procinfo (int pid
, int tid
);
422 static void destroy_procinfo (procinfo
* p
);
423 static void do_destroy_procinfo_cleanup (void *);
424 static void dead_procinfo (procinfo
* p
, char *msg
, int killp
);
425 static int open_procinfo_files (procinfo
* p
, int which
);
426 static void close_procinfo_files (procinfo
* p
);
427 static int sysset_t_size (procinfo
*p
);
428 static sysset_t
*sysset_t_alloc (procinfo
* pi
);
429 #ifdef DYNAMIC_SYSCALLS
430 static void load_syscalls (procinfo
*pi
);
431 static void free_syscalls (procinfo
*pi
);
432 static int find_syscall (procinfo
*pi
, char *name
);
433 #endif /* DYNAMIC_SYSCALLS */
435 static int iterate_over_mappings
436 (procinfo
*pi
, find_memory_region_ftype child_func
, void *data
,
437 int (*func
) (struct prmap
*map
, find_memory_region_ftype child_func
,
440 /* The head of the procinfo list: */
441 static procinfo
* procinfo_list
;
443 /* Search the procinfo list. Return a pointer to procinfo, or NULL if
447 find_procinfo (int pid
, int tid
)
451 for (pi
= procinfo_list
; pi
; pi
= pi
->next
)
458 /* Don't check threads_valid. If we're updating the
459 thread_list, we want to find whatever threads are already
460 here. This means that in general it is the caller's
461 responsibility to check threads_valid and update before
462 calling find_procinfo, if the caller wants to find a new
465 for (pi
= pi
->thread_list
; pi
; pi
= pi
->next
)
473 /* Calls find_procinfo, but errors on failure. */
476 find_procinfo_or_die (int pid
, int tid
)
478 procinfo
*pi
= find_procinfo (pid
, tid
);
483 error (_("procfs: couldn't find pid %d "
484 "(kernel thread %d) in procinfo list."),
487 error (_("procfs: couldn't find pid %d in procinfo list."), pid
);
492 /* Wrapper for `open'. The appropriate open call is attempted; if
493 unsuccessful, it will be retried as many times as needed for the
494 EAGAIN and EINTR conditions.
496 For other conditions, retry the open a limited number of times. In
497 addition, a short sleep is imposed prior to retrying the open. The
498 reason for this sleep is to give the kernel a chance to catch up
499 and create the file in question in the event that GDB "wins" the
500 race to open a file before the kernel has created it. */
503 open_with_retry (const char *pathname
, int flags
)
505 int retries_remaining
, status
;
507 retries_remaining
= 2;
511 status
= open (pathname
, flags
);
513 if (status
>= 0 || retries_remaining
== 0)
515 else if (errno
!= EINTR
&& errno
!= EAGAIN
)
525 /* Open the file descriptor for the process or LWP. If NEW_PROC_API
526 is defined, we only open the control file descriptor; the others
527 are opened lazily as needed. Otherwise (if not NEW_PROC_API),
528 there is only one real file descriptor, but we keep multiple copies
529 of it so that the code that uses them does not have to be #ifdef'd.
530 Returns the file descriptor, or zero for failure. */
532 enum { FD_CTL
, FD_STATUS
, FD_AS
};
535 open_procinfo_files (procinfo
*pi
, int which
)
538 char tmp
[MAX_PROC_NAME_SIZE
];
542 /* This function is getting ALMOST long enough to break up into
543 several. Here is some rationale:
545 NEW_PROC_API (Solaris 2.6, Solaris 2.7):
546 There are several file descriptors that may need to be open
547 for any given process or LWP. The ones we're intereted in are:
548 - control (ctl) write-only change the state
549 - status (status) read-only query the state
550 - address space (as) read/write access memory
551 - map (map) read-only virtual addr map
552 Most of these are opened lazily as they are needed.
553 The pathnames for the 'files' for an LWP look slightly
554 different from those of a first-class process:
555 Pathnames for a process (<proc-id>):
557 /proc/<proc-id>/status
560 Pathnames for an LWP (lwp-id):
561 /proc/<proc-id>/lwp/<lwp-id>/lwpctl
562 /proc/<proc-id>/lwp/<lwp-id>/lwpstatus
563 An LWP has no map or address space file descriptor, since
564 the memory map and address space are shared by all LWPs.
566 Everyone else (Solaris 2.5, Irix, OSF)
567 There is only one file descriptor for each process or LWP.
568 For convenience, we copy the same file descriptor into all
569 three fields of the procinfo struct (ctl_fd, status_fd, and
570 as_fd, see NEW_PROC_API above) so that code that uses them
571 doesn't need any #ifdef's.
576 Each LWP has an independent file descriptor, but these
577 are not obtained via the 'open' system call like the rest:
578 instead, they're obtained thru an ioctl call (PIOCOPENLWP)
579 to the file descriptor of the parent process.
582 These do not even have their own independent file descriptor.
583 All operations are carried out on the file descriptor of the
584 parent process. Therefore we just call open again for each
585 thread, getting a new handle for the same 'file'. */
588 /* In this case, there are several different file descriptors that
589 we might be asked to open. The control file descriptor will be
590 opened early, but the others will be opened lazily as they are
593 strcpy (tmp
, pi
->pathname
);
594 switch (which
) { /* Which file descriptor to open? */
597 strcat (tmp
, "/lwpctl");
599 strcat (tmp
, "/ctl");
600 fd
= open_with_retry (tmp
, O_WRONLY
);
607 return 0; /* There is no 'as' file descriptor for an lwp. */
609 fd
= open_with_retry (tmp
, O_RDWR
);
616 strcat (tmp
, "/lwpstatus");
618 strcat (tmp
, "/status");
619 fd
= open_with_retry (tmp
, O_RDONLY
);
625 return 0; /* unknown file descriptor */
627 #else /* not NEW_PROC_API */
628 /* In this case, there is only one file descriptor for each procinfo
629 (ie. each process or LWP). In fact, only the file descriptor for
630 the process can actually be opened by an 'open' system call. The
631 ones for the LWPs have to be obtained thru an IOCTL call on the
632 process's file descriptor.
634 For convenience, we copy each procinfo's single file descriptor
635 into all of the fields occupied by the several file descriptors
636 of the NEW_PROC_API implementation. That way, the code that uses
637 them can be written without ifdefs. */
640 #ifdef PIOCTSTATUS /* OSF */
641 /* Only one FD; just open it. */
642 if ((fd
= open_with_retry (pi
->pathname
, O_RDWR
)) < 0)
644 #else /* Sol 2.5, Irix, other? */
645 if (pi
->tid
== 0) /* Master procinfo for the process */
647 fd
= open_with_retry (pi
->pathname
, O_RDWR
);
651 else /* LWP thread procinfo */
653 #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */
657 /* Find the procinfo for the entire process. */
658 if ((process
= find_procinfo (pi
->pid
, 0)) == NULL
)
661 /* Now obtain the file descriptor for the LWP. */
662 if ((fd
= ioctl (process
->ctl_fd
, PIOCOPENLWP
, &lwpid
)) < 0)
664 #else /* Irix, other? */
665 return 0; /* Don't know how to open threads. */
666 #endif /* Sol 2.5 PIOCOPENLWP */
668 #endif /* OSF PIOCTSTATUS */
669 pi
->ctl_fd
= pi
->as_fd
= pi
->status_fd
= fd
;
670 #endif /* NEW_PROC_API */
672 return 1; /* success */
675 /* Allocate a data structure and link it into the procinfo list.
676 First tries to find a pre-existing one (FIXME: why?). Returns the
677 pointer to new procinfo struct. */
680 create_procinfo (int pid
, int tid
)
682 procinfo
*pi
, *parent
= NULL
;
684 if ((pi
= find_procinfo (pid
, tid
)))
685 return pi
; /* Already exists, nothing to do. */
687 /* Find parent before doing malloc, to save having to cleanup. */
689 parent
= find_procinfo_or_die (pid
, 0); /* FIXME: should I
691 doesn't exist yet? */
693 pi
= XNEW (procinfo
);
694 memset (pi
, 0, sizeof (procinfo
));
698 #ifdef DYNAMIC_SYSCALLS
702 pi
->saved_entryset
= sysset_t_alloc (pi
);
703 pi
->saved_exitset
= sysset_t_alloc (pi
);
705 /* Chain into list. */
708 sprintf (pi
->pathname
, MAIN_PROC_NAME_FMT
, pid
);
709 pi
->next
= procinfo_list
;
715 sprintf (pi
->pathname
, "/proc/%05d/lwp/%d", pid
, tid
);
717 sprintf (pi
->pathname
, MAIN_PROC_NAME_FMT
, pid
);
719 pi
->next
= parent
->thread_list
;
720 parent
->thread_list
= pi
;
725 /* Close all file descriptors associated with the procinfo. */
728 close_procinfo_files (procinfo
*pi
)
735 if (pi
->status_fd
> 0)
736 close (pi
->status_fd
);
738 pi
->ctl_fd
= pi
->as_fd
= pi
->status_fd
= 0;
741 /* Destructor function. Close, unlink and deallocate the object. */
744 destroy_one_procinfo (procinfo
**list
, procinfo
*pi
)
748 /* Step one: unlink the procinfo from its list. */
752 for (ptr
= *list
; ptr
; ptr
= ptr
->next
)
755 ptr
->next
= pi
->next
;
759 /* Step two: close any open file descriptors. */
760 close_procinfo_files (pi
);
762 /* Step three: free the memory. */
763 #ifdef DYNAMIC_SYSCALLS
766 xfree (pi
->saved_entryset
);
767 xfree (pi
->saved_exitset
);
772 destroy_procinfo (procinfo
*pi
)
776 if (pi
->tid
!= 0) /* Destroy a thread procinfo. */
778 tmp
= find_procinfo (pi
->pid
, 0); /* Find the parent process. */
779 destroy_one_procinfo (&tmp
->thread_list
, pi
);
781 else /* Destroy a process procinfo and all its threads. */
783 /* First destroy the children, if any; */
784 while (pi
->thread_list
!= NULL
)
785 destroy_one_procinfo (&pi
->thread_list
, pi
->thread_list
);
786 /* Then destroy the parent. Genocide!!! */
787 destroy_one_procinfo (&procinfo_list
, pi
);
792 do_destroy_procinfo_cleanup (void *pi
)
794 destroy_procinfo (pi
);
797 enum { NOKILL
, KILL
};
799 /* To be called on a non_recoverable error for a procinfo. Prints
800 error messages, optionally sends a SIGKILL to the process, then
801 destroys the data structure. */
804 dead_procinfo (procinfo
*pi
, char *msg
, int kill_p
)
810 print_sys_errmsg (pi
->pathname
, errno
);
814 sprintf (procfile
, "process %d", pi
->pid
);
815 print_sys_errmsg (procfile
, errno
);
818 kill (pi
->pid
, SIGKILL
);
820 destroy_procinfo (pi
);
824 /* Returns the (complete) size of a sysset_t struct. Normally, this
825 is just sizeof (sysset_t), but in the case of Monterey/64, the
826 actual size of sysset_t isn't known until runtime. */
829 sysset_t_size (procinfo
* pi
)
831 #ifndef DYNAMIC_SYSCALLS
832 return sizeof (sysset_t
);
834 return sizeof (sysset_t
) - sizeof (uint64_t)
835 + sizeof (uint64_t) * ((pi
->num_syscalls
+ (8 * sizeof (uint64_t) - 1))
836 / (8 * sizeof (uint64_t)));
840 /* Allocate and (partially) initialize a sysset_t struct. */
843 sysset_t_alloc (procinfo
* pi
)
846 int size
= sysset_t_size (pi
);
848 ret
= xmalloc (size
);
849 #ifdef DYNAMIC_SYSCALLS
850 ret
->pr_size
= ((pi
->num_syscalls
+ (8 * sizeof (uint64_t) - 1))
851 / (8 * sizeof (uint64_t)));
856 #ifdef DYNAMIC_SYSCALLS
858 /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize
859 pi->num_syscalls with the number of syscalls and pi->syscall_names
860 with the names. (Certain numbers may be skipped in which case the
861 names for these numbers will be left as NULL.) */
863 #define MAX_SYSCALL_NAME_LENGTH 256
864 #define MAX_SYSCALLS 65536
867 load_syscalls (procinfo
*pi
)
869 char pathname
[MAX_PROC_NAME_SIZE
];
872 prsyscall_t
*syscalls
;
873 int i
, size
, maxcall
;
874 struct cleanup
*cleanups
;
876 pi
->num_syscalls
= 0;
877 pi
->syscall_names
= 0;
879 /* Open the file descriptor for the sysent file. */
880 sprintf (pathname
, "/proc/%d/sysent", pi
->pid
);
881 sysent_fd
= open_with_retry (pathname
, O_RDONLY
);
884 error (_("load_syscalls: Can't open /proc/%d/sysent"), pi
->pid
);
886 cleanups
= make_cleanup_close (sysent_fd
);
888 size
= sizeof header
- sizeof (prsyscall_t
);
889 if (read (sysent_fd
, &header
, size
) != size
)
891 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi
->pid
);
894 if (header
.pr_nsyscalls
== 0)
896 error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"),
900 size
= header
.pr_nsyscalls
* sizeof (prsyscall_t
);
901 syscalls
= xmalloc (size
);
902 make_cleanup (free_current_contents
, &syscalls
);
904 if (read (sysent_fd
, syscalls
, size
) != size
)
905 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi
->pid
);
907 /* Find maximum syscall number. This may not be the same as
908 pr_nsyscalls since that value refers to the number of entries
909 in the table. (Also, the docs indicate that some system
910 call numbers may be skipped.) */
912 maxcall
= syscalls
[0].pr_number
;
914 for (i
= 1; i
< header
.pr_nsyscalls
; i
++)
915 if (syscalls
[i
].pr_number
> maxcall
916 && syscalls
[i
].pr_nameoff
> 0
917 && syscalls
[i
].pr_number
< MAX_SYSCALLS
)
918 maxcall
= syscalls
[i
].pr_number
;
920 pi
->num_syscalls
= maxcall
+1;
921 pi
->syscall_names
= XNEWVEC (char *, pi
->num_syscalls
);
923 for (i
= 0; i
< pi
->num_syscalls
; i
++)
924 pi
->syscall_names
[i
] = NULL
;
926 /* Read the syscall names in. */
927 for (i
= 0; i
< header
.pr_nsyscalls
; i
++)
929 char namebuf
[MAX_SYSCALL_NAME_LENGTH
];
933 if (syscalls
[i
].pr_number
>= MAX_SYSCALLS
934 || syscalls
[i
].pr_number
< 0
935 || syscalls
[i
].pr_nameoff
<= 0
936 || (lseek (sysent_fd
, (off_t
) syscalls
[i
].pr_nameoff
, SEEK_SET
)
937 != (off_t
) syscalls
[i
].pr_nameoff
))
940 nread
= read (sysent_fd
, namebuf
, sizeof namebuf
);
944 callnum
= syscalls
[i
].pr_number
;
946 if (pi
->syscall_names
[callnum
] != NULL
)
948 /* FIXME: Generate warning. */
952 namebuf
[nread
-1] = '\0';
953 size
= strlen (namebuf
) + 1;
954 pi
->syscall_names
[callnum
] = xmalloc (size
);
955 strncpy (pi
->syscall_names
[callnum
], namebuf
, size
-1);
956 pi
->syscall_names
[callnum
][size
-1] = '\0';
959 do_cleanups (cleanups
);
962 /* Free the space allocated for the syscall names from the procinfo
966 free_syscalls (procinfo
*pi
)
968 if (pi
->syscall_names
)
972 for (i
= 0; i
< pi
->num_syscalls
; i
++)
973 if (pi
->syscall_names
[i
] != NULL
)
974 xfree (pi
->syscall_names
[i
]);
976 xfree (pi
->syscall_names
);
977 pi
->syscall_names
= 0;
981 /* Given a name, look up (and return) the corresponding syscall number.
982 If no match is found, return -1. */
985 find_syscall (procinfo
*pi
, char *name
)
989 for (i
= 0; i
< pi
->num_syscalls
; i
++)
991 if (pi
->syscall_names
[i
] && strcmp (name
, pi
->syscall_names
[i
]) == 0)
998 /* =================== END, STRUCT PROCINFO "MODULE" =================== */
1000 /* =================== /proc "MODULE" =================== */
1002 /* This "module" is the interface layer between the /proc system API
1003 and the gdb target vector functions. This layer consists of access
1004 functions that encapsulate each of the basic operations that we
1005 need to use from the /proc API.
1007 The main motivation for this layer is to hide the fact that there
1008 are two very different implementations of the /proc API. Rather
1009 than have a bunch of #ifdefs all thru the gdb target vector
1010 functions, we do our best to hide them all in here. */
1012 static long proc_flags (procinfo
* pi
);
1013 static int proc_why (procinfo
* pi
);
1014 static int proc_what (procinfo
* pi
);
1015 static int proc_set_current_signal (procinfo
* pi
, int signo
);
1016 static int proc_get_current_thread (procinfo
* pi
);
1017 static int proc_iterate_over_threads
1019 int (*func
) (procinfo
*, procinfo
*, void *),
1023 proc_warn (procinfo
*pi
, char *func
, int line
)
1025 sprintf (errmsg
, "procfs: %s line %d, %s", func
, line
, pi
->pathname
);
1026 print_sys_errmsg (errmsg
, errno
);
1030 proc_error (procinfo
*pi
, char *func
, int line
)
1032 sprintf (errmsg
, "procfs: %s line %d, %s", func
, line
, pi
->pathname
);
1033 perror_with_name (errmsg
);
1036 /* Updates the status struct in the procinfo. There is a 'valid'
1037 flag, to let other functions know when this function needs to be
1038 called (so the status is only read when it is needed). The status
1039 file descriptor is also only opened when it is needed. Returns
1040 non-zero for success, zero for failure. */
1043 proc_get_status (procinfo
*pi
)
1045 /* Status file descriptor is opened "lazily". */
1046 if (pi
->status_fd
== 0 &&
1047 open_procinfo_files (pi
, FD_STATUS
) == 0)
1049 pi
->status_valid
= 0;
1054 if (lseek (pi
->status_fd
, 0, SEEK_SET
) < 0)
1055 pi
->status_valid
= 0; /* fail */
1058 /* Sigh... I have to read a different data structure,
1059 depending on whether this is a main process or an LWP. */
1061 pi
->status_valid
= (read (pi
->status_fd
,
1062 (char *) &pi
->prstatus
.pr_lwp
,
1063 sizeof (lwpstatus_t
))
1064 == sizeof (lwpstatus_t
));
1067 pi
->status_valid
= (read (pi
->status_fd
,
1068 (char *) &pi
->prstatus
,
1069 sizeof (gdb_prstatus_t
))
1070 == sizeof (gdb_prstatus_t
));
1073 #else /* ioctl method */
1074 #ifdef PIOCTSTATUS /* osf */
1075 if (pi
->tid
== 0) /* main process */
1077 /* Just read the danged status. Now isn't that simple? */
1079 (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) >= 0);
1086 tid_t pr_error_thread
;
1087 struct prstatus status
;
1090 thread_status
.pr_count
= 1;
1091 thread_status
.status
.pr_tid
= pi
->tid
;
1092 win
= (ioctl (pi
->status_fd
, PIOCTSTATUS
, &thread_status
) >= 0);
1095 memcpy (&pi
->prstatus
, &thread_status
.status
,
1096 sizeof (pi
->prstatus
));
1097 pi
->status_valid
= 1;
1101 /* Just read the danged status. Now isn't that simple? */
1102 pi
->status_valid
= (ioctl (pi
->status_fd
, PIOCSTATUS
, &pi
->prstatus
) >= 0);
1106 if (pi
->status_valid
)
1108 PROC_PRETTYFPRINT_STATUS (proc_flags (pi
),
1111 proc_get_current_thread (pi
));
1114 /* The status struct includes general regs, so mark them valid too. */
1115 pi
->gregs_valid
= pi
->status_valid
;
1117 /* In the read/write multiple-fd model, the status struct includes
1118 the fp regs too, so mark them valid too. */
1119 pi
->fpregs_valid
= pi
->status_valid
;
1121 return pi
->status_valid
; /* True if success, false if failure. */
1124 /* Returns the process flags (pr_flags field). */
1127 proc_flags (procinfo
*pi
)
1129 if (!pi
->status_valid
)
1130 if (!proc_get_status (pi
))
1131 return 0; /* FIXME: not a good failure value (but what is?) */
1134 return pi
->prstatus
.pr_lwp
.pr_flags
;
1136 return pi
->prstatus
.pr_flags
;
1140 /* Returns the pr_why field (why the process stopped). */
1143 proc_why (procinfo
*pi
)
1145 if (!pi
->status_valid
)
1146 if (!proc_get_status (pi
))
1147 return 0; /* FIXME: not a good failure value (but what is?) */
1150 return pi
->prstatus
.pr_lwp
.pr_why
;
1152 return pi
->prstatus
.pr_why
;
1156 /* Returns the pr_what field (details of why the process stopped). */
1159 proc_what (procinfo
*pi
)
1161 if (!pi
->status_valid
)
1162 if (!proc_get_status (pi
))
1163 return 0; /* FIXME: not a good failure value (but what is?) */
1166 return pi
->prstatus
.pr_lwp
.pr_what
;
1168 return pi
->prstatus
.pr_what
;
1172 /* This function is only called when PI is stopped by a watchpoint.
1173 Assuming the OS supports it, write to *ADDR the data address which
1174 triggered it and return 1. Return 0 if it is not possible to know
1178 proc_watchpoint_address (procinfo
*pi
, CORE_ADDR
*addr
)
1180 if (!pi
->status_valid
)
1181 if (!proc_get_status (pi
))
1185 *addr
= (CORE_ADDR
) gdbarch_pointer_to_address (target_gdbarch (),
1186 builtin_type (target_gdbarch ())->builtin_data_ptr
,
1187 (gdb_byte
*) &pi
->prstatus
.pr_lwp
.pr_info
.si_addr
);
1189 *addr
= (CORE_ADDR
) gdbarch_pointer_to_address (target_gdbarch (),
1190 builtin_type (target_gdbarch ())->builtin_data_ptr
,
1191 (gdb_byte
*) &pi
->prstatus
.pr_info
.si_addr
);
1196 #ifndef PIOCSSPCACT /* The following is not supported on OSF. */
1198 /* Returns the pr_nsysarg field (number of args to the current
1202 proc_nsysarg (procinfo
*pi
)
1204 if (!pi
->status_valid
)
1205 if (!proc_get_status (pi
))
1209 return pi
->prstatus
.pr_lwp
.pr_nsysarg
;
1211 return pi
->prstatus
.pr_nsysarg
;
1215 /* Returns the pr_sysarg field (pointer to the arguments of current
1219 proc_sysargs (procinfo
*pi
)
1221 if (!pi
->status_valid
)
1222 if (!proc_get_status (pi
))
1226 return (long *) &pi
->prstatus
.pr_lwp
.pr_sysarg
;
1228 return (long *) &pi
->prstatus
.pr_sysarg
;
1231 #endif /* PIOCSSPCACT */
1233 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
1234 /* Returns the pr_cursig field (current signal). */
1237 proc_cursig (struct procinfo
*pi
)
1239 if (!pi
->status_valid
)
1240 if (!proc_get_status (pi
))
1241 return 0; /* FIXME: not a good failure value (but what is?) */
1244 return pi
->prstatus
.pr_lwp
.pr_cursig
;
1246 return pi
->prstatus
.pr_cursig
;
1249 #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */
1251 /* === I appologize for the messiness of this function.
1252 === This is an area where the different versions of
1253 === /proc are more inconsistent than usual.
1255 Set or reset any of the following process flags:
1256 PR_FORK -- forked child will inherit trace flags
1257 PR_RLC -- traced process runs when last /proc file closed.
1258 PR_KLC -- traced process is killed when last /proc file closed.
1259 PR_ASYNC -- LWP's get to run/stop independently.
1261 There are three methods for doing this function:
1262 1) Newest: read/write [PCSET/PCRESET/PCUNSET]
1264 2) Middle: PIOCSET/PIOCRESET
1266 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC
1269 Note: Irix does not define PR_ASYNC.
1270 Note: OSF does not define PR_KLC.
1271 Note: OSF is the only one that can ONLY use the oldest method.
1275 flag -- one of PR_FORK, PR_RLC, or PR_ASYNC
1276 mode -- 1 for set, 0 for reset.
1278 Returns non-zero for success, zero for failure. */
1280 enum { FLAG_RESET
, FLAG_SET
};
1283 proc_modify_flag (procinfo
*pi
, long flag
, long mode
)
1285 long win
= 0; /* default to fail */
1287 /* These operations affect the process as a whole, and applying them
1288 to an individual LWP has the same meaning as applying them to the
1289 main process. Therefore, if we're ever called with a pointer to
1290 an LWP's procinfo, let's substitute the process's procinfo and
1291 avoid opening the LWP's file descriptor unnecessarily. */
1294 pi
= find_procinfo_or_die (pi
->pid
, 0);
1296 #ifdef NEW_PROC_API /* Newest method: Newer Solarii. */
1297 /* First normalize the PCUNSET/PCRESET command opcode
1298 (which for no obvious reason has a different definition
1299 from one operating system to the next...) */
1301 #define GDBRESET PCUNSET
1304 #define GDBRESET PCRESET
1308 procfs_ctl_t arg
[2];
1310 if (mode
== FLAG_SET
) /* Set the flag (RLC, FORK, or ASYNC). */
1312 else /* Reset the flag. */
1316 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
1319 #ifdef PIOCSET /* Irix/Sol5 method */
1320 if (mode
== FLAG_SET
) /* Set the flag (hopefully RLC, FORK, or ASYNC). */
1322 win
= (ioctl (pi
->ctl_fd
, PIOCSET
, &flag
) >= 0);
1324 else /* Reset the flag. */
1326 win
= (ioctl (pi
->ctl_fd
, PIOCRESET
, &flag
) >= 0);
1330 #ifdef PIOCSRLC /* Oldest method: OSF */
1333 if (mode
== FLAG_SET
) /* Set run-on-last-close */
1335 win
= (ioctl (pi
->ctl_fd
, PIOCSRLC
, NULL
) >= 0);
1337 else /* Clear run-on-last-close */
1339 win
= (ioctl (pi
->ctl_fd
, PIOCRRLC
, NULL
) >= 0);
1343 if (mode
== FLAG_SET
) /* Set inherit-on-fork */
1345 win
= (ioctl (pi
->ctl_fd
, PIOCSFORK
, NULL
) >= 0);
1347 else /* Clear inherit-on-fork */
1349 win
= (ioctl (pi
->ctl_fd
, PIOCRFORK
, NULL
) >= 0);
1353 win
= 0; /* Fail -- unknown flag (can't do PR_ASYNC). */
1360 /* The above operation renders the procinfo's cached pstatus
1362 pi
->status_valid
= 0;
1365 warning (_("procfs: modify_flag failed to turn %s %s"),
1366 flag
== PR_FORK
? "PR_FORK" :
1367 flag
== PR_RLC
? "PR_RLC" :
1369 flag
== PR_ASYNC
? "PR_ASYNC" :
1372 flag
== PR_KLC
? "PR_KLC" :
1375 mode
== FLAG_RESET
? "off" : "on");
1380 /* Set the run_on_last_close flag. Process with all threads will
1381 become runnable when debugger closes all /proc fds. Returns
1382 non-zero for success, zero for failure. */
1385 proc_set_run_on_last_close (procinfo
*pi
)
1387 return proc_modify_flag (pi
, PR_RLC
, FLAG_SET
);
1390 /* Reset the run_on_last_close flag. The process will NOT become
1391 runnable when debugger closes its file handles. Returns non-zero
1392 for success, zero for failure. */
1395 proc_unset_run_on_last_close (procinfo
*pi
)
1397 return proc_modify_flag (pi
, PR_RLC
, FLAG_RESET
);
1400 /* Reset inherit_on_fork flag. If the process forks a child while we
1401 are registered for events in the parent, then we will NOT recieve
1402 events from the child. Returns non-zero for success, zero for
1406 proc_unset_inherit_on_fork (procinfo
*pi
)
1408 return proc_modify_flag (pi
, PR_FORK
, FLAG_RESET
);
1412 /* Set PR_ASYNC flag. If one LWP stops because of a debug event
1413 (signal etc.), the remaining LWPs will continue to run. Returns
1414 non-zero for success, zero for failure. */
1417 proc_set_async (procinfo
*pi
)
1419 return proc_modify_flag (pi
, PR_ASYNC
, FLAG_SET
);
1422 /* Reset PR_ASYNC flag. If one LWP stops because of a debug event
1423 (signal etc.), then all other LWPs will stop as well. Returns
1424 non-zero for success, zero for failure. */
1427 proc_unset_async (procinfo
*pi
)
1429 return proc_modify_flag (pi
, PR_ASYNC
, FLAG_RESET
);
1431 #endif /* PR_ASYNC */
1433 /* Request the process/LWP to stop. Does not wait. Returns non-zero
1434 for success, zero for failure. */
1437 proc_stop_process (procinfo
*pi
)
1441 /* We might conceivably apply this operation to an LWP, and the
1442 LWP's ctl file descriptor might not be open. */
1444 if (pi
->ctl_fd
== 0 &&
1445 open_procinfo_files (pi
, FD_CTL
) == 0)
1450 procfs_ctl_t cmd
= PCSTOP
;
1452 win
= (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
1453 #else /* ioctl method */
1454 win
= (ioctl (pi
->ctl_fd
, PIOCSTOP
, &pi
->prstatus
) >= 0);
1455 /* Note: the call also reads the prstatus. */
1458 pi
->status_valid
= 1;
1459 PROC_PRETTYFPRINT_STATUS (proc_flags (pi
),
1462 proc_get_current_thread (pi
));
1470 /* Wait for the process or LWP to stop (block until it does). Returns
1471 non-zero for success, zero for failure. */
1474 proc_wait_for_stop (procinfo
*pi
)
1478 /* We should never have to apply this operation to any procinfo
1479 except the one for the main process. If that ever changes for
1480 any reason, then take out the following clause and replace it
1481 with one that makes sure the ctl_fd is open. */
1484 pi
= find_procinfo_or_die (pi
->pid
, 0);
1488 procfs_ctl_t cmd
= PCWSTOP
;
1490 win
= (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
1491 /* We been runnin' and we stopped -- need to update status. */
1492 pi
->status_valid
= 0;
1494 #else /* ioctl method */
1495 win
= (ioctl (pi
->ctl_fd
, PIOCWSTOP
, &pi
->prstatus
) >= 0);
1496 /* Above call also refreshes the prstatus. */
1499 pi
->status_valid
= 1;
1500 PROC_PRETTYFPRINT_STATUS (proc_flags (pi
),
1503 proc_get_current_thread (pi
));
1510 /* Make the process or LWP runnable.
1512 Options (not all are implemented):
1514 - clear current fault
1515 - clear current signal
1516 - abort the current system call
1517 - stop as soon as finished with system call
1518 - (ioctl): set traced signal set
1519 - (ioctl): set held signal set
1520 - (ioctl): set traced fault set
1521 - (ioctl): set start pc (vaddr)
1523 Always clears the current fault. PI is the process or LWP to
1524 operate on. If STEP is true, set the process or LWP to trap after
1525 one instruction. If SIGNO is zero, clear the current signal if
1526 any; if non-zero, set the current signal to this one. Returns
1527 non-zero for success, zero for failure. */
1530 proc_run_process (procinfo
*pi
, int step
, int signo
)
1535 /* We will probably have to apply this operation to individual
1536 threads, so make sure the control file descriptor is open. */
1538 if (pi
->ctl_fd
== 0 &&
1539 open_procinfo_files (pi
, FD_CTL
) == 0)
1544 runflags
= PRCFAULT
; /* Always clear current fault. */
1549 else if (signo
!= -1) /* -1 means do nothing W.R.T. signals. */
1550 proc_set_current_signal (pi
, signo
);
1554 procfs_ctl_t cmd
[2];
1558 win
= (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
1560 #else /* ioctl method */
1564 memset (&prrun
, 0, sizeof (prrun
));
1565 prrun
.pr_flags
= runflags
;
1566 win
= (ioctl (pi
->ctl_fd
, PIOCRUN
, &prrun
) >= 0);
1573 /* Register to trace signals in the process or LWP. Returns non-zero
1574 for success, zero for failure. */
1577 proc_set_traced_signals (procinfo
*pi
, gdb_sigset_t
*sigset
)
1581 /* We should never have to apply this operation to any procinfo
1582 except the one for the main process. If that ever changes for
1583 any reason, then take out the following clause and replace it
1584 with one that makes sure the ctl_fd is open. */
1587 pi
= find_procinfo_or_die (pi
->pid
, 0);
1593 /* Use char array to avoid alignment issues. */
1594 char sigset
[sizeof (gdb_sigset_t
)];
1598 memcpy (&arg
.sigset
, sigset
, sizeof (gdb_sigset_t
));
1600 win
= (write (pi
->ctl_fd
, (char *) &arg
, sizeof (arg
)) == sizeof (arg
));
1602 #else /* ioctl method */
1603 win
= (ioctl (pi
->ctl_fd
, PIOCSTRACE
, sigset
) >= 0);
1605 /* The above operation renders the procinfo's cached pstatus obsolete. */
1606 pi
->status_valid
= 0;
1609 warning (_("procfs: set_traced_signals failed"));
1613 /* Register to trace hardware faults in the process or LWP. Returns
1614 non-zero for success, zero for failure. */
1617 proc_set_traced_faults (procinfo
*pi
, fltset_t
*fltset
)
1621 /* We should never have to apply this operation to any procinfo
1622 except the one for the main process. If that ever changes for
1623 any reason, then take out the following clause and replace it
1624 with one that makes sure the ctl_fd is open. */
1627 pi
= find_procinfo_or_die (pi
->pid
, 0);
1633 /* Use char array to avoid alignment issues. */
1634 char fltset
[sizeof (fltset_t
)];
1638 memcpy (&arg
.fltset
, fltset
, sizeof (fltset_t
));
1640 win
= (write (pi
->ctl_fd
, (char *) &arg
, sizeof (arg
)) == sizeof (arg
));
1642 #else /* ioctl method */
1643 win
= (ioctl (pi
->ctl_fd
, PIOCSFAULT
, fltset
) >= 0);
1645 /* The above operation renders the procinfo's cached pstatus obsolete. */
1646 pi
->status_valid
= 0;
1651 /* Register to trace entry to system calls in the process or LWP.
1652 Returns non-zero for success, zero for failure. */
1655 proc_set_traced_sysentry (procinfo
*pi
, sysset_t
*sysset
)
1659 /* We should never have to apply this operation to any procinfo
1660 except the one for the main process. If that ever changes for
1661 any reason, then take out the following clause and replace it
1662 with one that makes sure the ctl_fd is open. */
1665 pi
= find_procinfo_or_die (pi
->pid
, 0);
1669 struct gdb_proc_ctl_pcsentry
{
1671 /* Use char array to avoid alignment issues. */
1672 char sysset
[sizeof (sysset_t
)];
1674 int argp_size
= sizeof (struct gdb_proc_ctl_pcsentry
)
1676 + sysset_t_size (pi
);
1678 argp
= xmalloc (argp_size
);
1680 argp
->cmd
= PCSENTRY
;
1681 memcpy (&argp
->sysset
, sysset
, sysset_t_size (pi
));
1683 win
= (write (pi
->ctl_fd
, (char *) argp
, argp_size
) == argp_size
);
1686 #else /* ioctl method */
1687 win
= (ioctl (pi
->ctl_fd
, PIOCSENTRY
, sysset
) >= 0);
1689 /* The above operation renders the procinfo's cached pstatus
1691 pi
->status_valid
= 0;
1696 /* Register to trace exit from system calls in the process or LWP.
1697 Returns non-zero for success, zero for failure. */
1700 proc_set_traced_sysexit (procinfo
*pi
, sysset_t
*sysset
)
1704 /* We should never have to apply this operation to any procinfo
1705 except the one for the main process. If that ever changes for
1706 any reason, then take out the following clause and replace it
1707 with one that makes sure the ctl_fd is open. */
1710 pi
= find_procinfo_or_die (pi
->pid
, 0);
1714 struct gdb_proc_ctl_pcsexit
{
1716 /* Use char array to avoid alignment issues. */
1717 char sysset
[sizeof (sysset_t
)];
1719 int argp_size
= sizeof (struct gdb_proc_ctl_pcsexit
)
1721 + sysset_t_size (pi
);
1723 argp
= xmalloc (argp_size
);
1725 argp
->cmd
= PCSEXIT
;
1726 memcpy (&argp
->sysset
, sysset
, sysset_t_size (pi
));
1728 win
= (write (pi
->ctl_fd
, (char *) argp
, argp_size
) == argp_size
);
1731 #else /* ioctl method */
1732 win
= (ioctl (pi
->ctl_fd
, PIOCSEXIT
, sysset
) >= 0);
1734 /* The above operation renders the procinfo's cached pstatus
1736 pi
->status_valid
= 0;
1741 /* Specify the set of blocked / held signals in the process or LWP.
1742 Returns non-zero for success, zero for failure. */
1745 proc_set_held_signals (procinfo
*pi
, gdb_sigset_t
*sighold
)
1749 /* We should never have to apply this operation to any procinfo
1750 except the one for the main process. If that ever changes for
1751 any reason, then take out the following clause and replace it
1752 with one that makes sure the ctl_fd is open. */
1755 pi
= find_procinfo_or_die (pi
->pid
, 0);
1761 /* Use char array to avoid alignment issues. */
1762 char hold
[sizeof (gdb_sigset_t
)];
1766 memcpy (&arg
.hold
, sighold
, sizeof (gdb_sigset_t
));
1767 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
1770 win
= (ioctl (pi
->ctl_fd
, PIOCSHOLD
, sighold
) >= 0);
1772 /* The above operation renders the procinfo's cached pstatus
1774 pi
->status_valid
= 0;
1779 /* Returns the set of signals that are held / blocked. Will also copy
1780 the sigset if SAVE is non-zero. */
1782 static gdb_sigset_t
*
1783 proc_get_held_signals (procinfo
*pi
, gdb_sigset_t
*save
)
1785 gdb_sigset_t
*ret
= NULL
;
1787 /* We should never have to apply this operation to any procinfo
1788 except the one for the main process. If that ever changes for
1789 any reason, then take out the following clause and replace it
1790 with one that makes sure the ctl_fd is open. */
1793 pi
= find_procinfo_or_die (pi
->pid
, 0);
1796 if (!pi
->status_valid
)
1797 if (!proc_get_status (pi
))
1800 ret
= &pi
->prstatus
.pr_lwp
.pr_lwphold
;
1801 #else /* not NEW_PROC_API */
1803 static gdb_sigset_t sigheld
;
1805 if (ioctl (pi
->ctl_fd
, PIOCGHOLD
, &sigheld
) >= 0)
1808 #endif /* NEW_PROC_API */
1810 memcpy (save
, ret
, sizeof (gdb_sigset_t
));
1815 /* Returns the set of signals that are traced / debugged. Will also
1816 copy the sigset if SAVE is non-zero. */
1818 static gdb_sigset_t
*
1819 proc_get_traced_signals (procinfo
*pi
, gdb_sigset_t
*save
)
1821 gdb_sigset_t
*ret
= NULL
;
1823 /* We should never have to apply this operation to any procinfo
1824 except the one for the main process. If that ever changes for
1825 any reason, then take out the following clause and replace it
1826 with one that makes sure the ctl_fd is open. */
1829 pi
= find_procinfo_or_die (pi
->pid
, 0);
1832 if (!pi
->status_valid
)
1833 if (!proc_get_status (pi
))
1836 ret
= &pi
->prstatus
.pr_sigtrace
;
1839 static gdb_sigset_t sigtrace
;
1841 if (ioctl (pi
->ctl_fd
, PIOCGTRACE
, &sigtrace
) >= 0)
1846 memcpy (save
, ret
, sizeof (gdb_sigset_t
));
1851 /* Returns the set of hardware faults that are traced /debugged. Will
1852 also copy the faultset if SAVE is non-zero. */
1855 proc_get_traced_faults (procinfo
*pi
, fltset_t
*save
)
1857 fltset_t
*ret
= NULL
;
1859 /* We should never have to apply this operation to any procinfo
1860 except the one for the main process. If that ever changes for
1861 any reason, then take out the following clause and replace it
1862 with one that makes sure the ctl_fd is open. */
1865 pi
= find_procinfo_or_die (pi
->pid
, 0);
1868 if (!pi
->status_valid
)
1869 if (!proc_get_status (pi
))
1872 ret
= &pi
->prstatus
.pr_flttrace
;
1875 static fltset_t flttrace
;
1877 if (ioctl (pi
->ctl_fd
, PIOCGFAULT
, &flttrace
) >= 0)
1882 memcpy (save
, ret
, sizeof (fltset_t
));
1887 /* Returns the set of syscalls that are traced /debugged on entry.
1888 Will also copy the syscall set if SAVE is non-zero. */
1891 proc_get_traced_sysentry (procinfo
*pi
, sysset_t
*save
)
1893 sysset_t
*ret
= NULL
;
1895 /* We should never have to apply this operation to any procinfo
1896 except the one for the main process. If that ever changes for
1897 any reason, then take out the following clause and replace it
1898 with one that makes sure the ctl_fd is open. */
1901 pi
= find_procinfo_or_die (pi
->pid
, 0);
1904 if (!pi
->status_valid
)
1905 if (!proc_get_status (pi
))
1908 #ifndef DYNAMIC_SYSCALLS
1909 ret
= &pi
->prstatus
.pr_sysentry
;
1910 #else /* DYNAMIC_SYSCALLS */
1912 static sysset_t
*sysentry
;
1916 sysentry
= sysset_t_alloc (pi
);
1918 if (pi
->status_fd
== 0 && open_procinfo_files (pi
, FD_STATUS
) == 0)
1920 if (pi
->prstatus
.pr_sysentry_offset
== 0)
1922 gdb_premptysysset (sysentry
);
1928 if (lseek (pi
->status_fd
, (off_t
) pi
->prstatus
.pr_sysentry_offset
,
1930 != (off_t
) pi
->prstatus
.pr_sysentry_offset
)
1932 size
= sysset_t_size (pi
);
1933 gdb_premptysysset (sysentry
);
1934 rsize
= read (pi
->status_fd
, sysentry
, size
);
1939 #endif /* DYNAMIC_SYSCALLS */
1940 #else /* !NEW_PROC_API */
1942 static sysset_t sysentry
;
1944 if (ioctl (pi
->ctl_fd
, PIOCGENTRY
, &sysentry
) >= 0)
1947 #endif /* NEW_PROC_API */
1949 memcpy (save
, ret
, sysset_t_size (pi
));
1954 /* Returns the set of syscalls that are traced /debugged on exit.
1955 Will also copy the syscall set if SAVE is non-zero. */
1958 proc_get_traced_sysexit (procinfo
*pi
, sysset_t
*save
)
1960 sysset_t
* ret
= NULL
;
1962 /* We should never have to apply this operation to any procinfo
1963 except the one for the main process. If that ever changes for
1964 any reason, then take out the following clause and replace it
1965 with one that makes sure the ctl_fd is open. */
1968 pi
= find_procinfo_or_die (pi
->pid
, 0);
1971 if (!pi
->status_valid
)
1972 if (!proc_get_status (pi
))
1975 #ifndef DYNAMIC_SYSCALLS
1976 ret
= &pi
->prstatus
.pr_sysexit
;
1977 #else /* DYNAMIC_SYSCALLS */
1979 static sysset_t
*sysexit
;
1983 sysexit
= sysset_t_alloc (pi
);
1985 if (pi
->status_fd
== 0 && open_procinfo_files (pi
, FD_STATUS
) == 0)
1987 if (pi
->prstatus
.pr_sysexit_offset
== 0)
1989 gdb_premptysysset (sysexit
);
1995 if (lseek (pi
->status_fd
, (off_t
) pi
->prstatus
.pr_sysexit_offset
,
1997 != (off_t
) pi
->prstatus
.pr_sysexit_offset
)
1999 size
= sysset_t_size (pi
);
2000 gdb_premptysysset (sysexit
);
2001 rsize
= read (pi
->status_fd
, sysexit
, size
);
2006 #endif /* DYNAMIC_SYSCALLS */
2009 static sysset_t sysexit
;
2011 if (ioctl (pi
->ctl_fd
, PIOCGEXIT
, &sysexit
) >= 0)
2016 memcpy (save
, ret
, sysset_t_size (pi
));
2021 /* The current fault (if any) is cleared; the associated signal will
2022 not be sent to the process or LWP when it resumes. Returns
2023 non-zero for success, zero for failure. */
2026 proc_clear_current_fault (procinfo
*pi
)
2030 /* We should never have to apply this operation to any procinfo
2031 except the one for the main process. If that ever changes for
2032 any reason, then take out the following clause and replace it
2033 with one that makes sure the ctl_fd is open. */
2036 pi
= find_procinfo_or_die (pi
->pid
, 0);
2040 procfs_ctl_t cmd
= PCCFAULT
;
2042 win
= (write (pi
->ctl_fd
, (void *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
2045 win
= (ioctl (pi
->ctl_fd
, PIOCCFAULT
, 0) >= 0);
2051 /* Set the "current signal" that will be delivered next to the
2052 process. NOTE: semantics are different from those of KILL. This
2053 signal will be delivered to the process or LWP immediately when it
2054 is resumed (even if the signal is held/blocked); it will NOT
2055 immediately cause another event of interest, and will NOT first
2056 trap back to the debugger. Returns non-zero for success, zero for
2060 proc_set_current_signal (procinfo
*pi
, int signo
)
2065 /* Use char array to avoid alignment issues. */
2066 char sinfo
[sizeof (gdb_siginfo_t
)];
2068 gdb_siginfo_t mysinfo
;
2070 struct target_waitstatus wait_status
;
2072 /* We should never have to apply this operation to any procinfo
2073 except the one for the main process. If that ever changes for
2074 any reason, then take out the following clause and replace it
2075 with one that makes sure the ctl_fd is open. */
2078 pi
= find_procinfo_or_die (pi
->pid
, 0);
2080 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
2081 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
2082 receives a PIOCSSIG with a signal identical to the current
2083 signal, it messes up the current signal. Work around the kernel
2086 signo
== proc_cursig (pi
))
2087 return 1; /* I assume this is a success? */
2090 /* The pointer is just a type alias. */
2091 get_last_target_status (&wait_ptid
, &wait_status
);
2092 if (ptid_equal (wait_ptid
, inferior_ptid
)
2093 && wait_status
.kind
== TARGET_WAITKIND_STOPPED
2094 && wait_status
.value
.sig
== gdb_signal_from_host (signo
)
2095 && proc_get_status (pi
)
2097 && pi
->prstatus
.pr_lwp
.pr_info
.si_signo
== signo
2099 && pi
->prstatus
.pr_info
.si_signo
== signo
2102 /* Use the siginfo associated with the signal being
2105 memcpy (arg
.sinfo
, &pi
->prstatus
.pr_lwp
.pr_info
, sizeof (gdb_siginfo_t
));
2107 memcpy (arg
.sinfo
, &pi
->prstatus
.pr_info
, sizeof (gdb_siginfo_t
));
2111 mysinfo
.si_signo
= signo
;
2112 mysinfo
.si_code
= 0;
2113 mysinfo
.si_pid
= getpid (); /* ?why? */
2114 mysinfo
.si_uid
= getuid (); /* ?why? */
2115 memcpy (arg
.sinfo
, &mysinfo
, sizeof (gdb_siginfo_t
));
2120 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2122 win
= (ioctl (pi
->ctl_fd
, PIOCSSIG
, (void *) &arg
.sinfo
) >= 0);
2128 /* The current signal (if any) is cleared, and is not sent to the
2129 process or LWP when it resumes. Returns non-zero for success, zero
2133 proc_clear_current_signal (procinfo
*pi
)
2137 /* We should never have to apply this operation to any procinfo
2138 except the one for the main process. If that ever changes for
2139 any reason, then take out the following clause and replace it
2140 with one that makes sure the ctl_fd is open. */
2143 pi
= find_procinfo_or_die (pi
->pid
, 0);
2149 /* Use char array to avoid alignment issues. */
2150 char sinfo
[sizeof (gdb_siginfo_t
)];
2152 gdb_siginfo_t mysinfo
;
2155 /* The pointer is just a type alias. */
2156 mysinfo
.si_signo
= 0;
2157 mysinfo
.si_code
= 0;
2158 mysinfo
.si_errno
= 0;
2159 mysinfo
.si_pid
= getpid (); /* ?why? */
2160 mysinfo
.si_uid
= getuid (); /* ?why? */
2161 memcpy (arg
.sinfo
, &mysinfo
, sizeof (gdb_siginfo_t
));
2163 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2166 win
= (ioctl (pi
->ctl_fd
, PIOCSSIG
, 0) >= 0);
2172 /* Return the general-purpose registers for the process or LWP
2173 corresponding to PI. Upon failure, return NULL. */
2175 static gdb_gregset_t
*
2176 proc_get_gregs (procinfo
*pi
)
2178 if (!pi
->status_valid
|| !pi
->gregs_valid
)
2179 if (!proc_get_status (pi
))
2183 return &pi
->prstatus
.pr_lwp
.pr_reg
;
2185 return &pi
->prstatus
.pr_reg
;
2189 /* Return the general-purpose registers for the process or LWP
2190 corresponding to PI. Upon failure, return NULL. */
2192 static gdb_fpregset_t
*
2193 proc_get_fpregs (procinfo
*pi
)
2196 if (!pi
->status_valid
|| !pi
->fpregs_valid
)
2197 if (!proc_get_status (pi
))
2200 return &pi
->prstatus
.pr_lwp
.pr_fpreg
;
2202 #else /* not NEW_PROC_API */
2203 if (pi
->fpregs_valid
)
2204 return &pi
->fpregset
; /* Already got 'em. */
2207 if (pi
->ctl_fd
== 0 && open_procinfo_files (pi
, FD_CTL
) == 0)
2216 tid_t pr_error_thread
;
2217 tfpregset_t thread_1
;
2220 thread_fpregs
.pr_count
= 1;
2221 thread_fpregs
.thread_1
.tid
= pi
->tid
;
2224 && ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
) >= 0)
2226 pi
->fpregs_valid
= 1;
2227 return &pi
->fpregset
; /* Got 'em now! */
2229 else if (pi
->tid
!= 0
2230 && ioctl (pi
->ctl_fd
, PIOCTGFPREG
, &thread_fpregs
) >= 0)
2232 memcpy (&pi
->fpregset
, &thread_fpregs
.thread_1
.pr_fpregs
,
2233 sizeof (pi
->fpregset
));
2234 pi
->fpregs_valid
= 1;
2235 return &pi
->fpregset
; /* Got 'em now! */
2242 if (ioctl (pi
->ctl_fd
, PIOCGFPREG
, &pi
->fpregset
) >= 0)
2244 pi
->fpregs_valid
= 1;
2245 return &pi
->fpregset
; /* Got 'em now! */
2254 #endif /* NEW_PROC_API */
2257 /* Write the general-purpose registers back to the process or LWP
2258 corresponding to PI. Return non-zero for success, zero for
2262 proc_set_gregs (procinfo
*pi
)
2264 gdb_gregset_t
*gregs
;
2267 gregs
= proc_get_gregs (pi
);
2269 return 0; /* proc_get_regs has already warned. */
2271 if (pi
->ctl_fd
== 0 && open_procinfo_files (pi
, FD_CTL
) == 0)
2280 /* Use char array to avoid alignment issues. */
2281 char gregs
[sizeof (gdb_gregset_t
)];
2285 memcpy (&arg
.gregs
, gregs
, sizeof (arg
.gregs
));
2286 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2288 win
= (ioctl (pi
->ctl_fd
, PIOCSREG
, gregs
) >= 0);
2292 /* Policy: writing the registers invalidates our cache. */
2293 pi
->gregs_valid
= 0;
2297 /* Write the floating-pointer registers back to the process or LWP
2298 corresponding to PI. Return non-zero for success, zero for
2302 proc_set_fpregs (procinfo
*pi
)
2304 gdb_fpregset_t
*fpregs
;
2307 fpregs
= proc_get_fpregs (pi
);
2309 return 0; /* proc_get_fpregs has already warned. */
2311 if (pi
->ctl_fd
== 0 && open_procinfo_files (pi
, FD_CTL
) == 0)
2320 /* Use char array to avoid alignment issues. */
2321 char fpregs
[sizeof (gdb_fpregset_t
)];
2325 memcpy (&arg
.fpregs
, fpregs
, sizeof (arg
.fpregs
));
2326 win
= (write (pi
->ctl_fd
, (void *) &arg
, sizeof (arg
)) == sizeof (arg
));
2330 win
= (ioctl (pi
->ctl_fd
, PIOCSFPREG
, fpregs
) >= 0);
2335 tid_t pr_error_thread
;
2336 tfpregset_t thread_1
;
2339 thread_fpregs
.pr_count
= 1;
2340 thread_fpregs
.thread_1
.tid
= pi
->tid
;
2341 memcpy (&thread_fpregs
.thread_1
.pr_fpregs
, fpregs
,
2343 win
= (ioctl (pi
->ctl_fd
, PIOCTSFPREG
, &thread_fpregs
) >= 0);
2346 win
= (ioctl (pi
->ctl_fd
, PIOCSFPREG
, fpregs
) >= 0);
2348 #endif /* NEW_PROC_API */
2351 /* Policy: writing the registers invalidates our cache. */
2352 pi
->fpregs_valid
= 0;
2356 /* Send a signal to the proc or lwp with the semantics of "kill()".
2357 Returns non-zero for success, zero for failure. */
2360 proc_kill (procinfo
*pi
, int signo
)
2364 /* We might conceivably apply this operation to an LWP, and the
2365 LWP's ctl file descriptor might not be open. */
2367 if (pi
->ctl_fd
== 0 &&
2368 open_procinfo_files (pi
, FD_CTL
) == 0)
2375 procfs_ctl_t cmd
[2];
2379 win
= (write (pi
->ctl_fd
, (char *) &cmd
, sizeof (cmd
)) == sizeof (cmd
));
2380 #else /* ioctl method */
2381 /* FIXME: do I need the Alpha OSF fixups present in
2382 procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */
2383 win
= (ioctl (pi
->ctl_fd
, PIOCKILL
, &signo
) >= 0);
2390 /* Find the pid of the process that started this one. Returns the
2391 parent process pid, or zero. */
2394 proc_parent_pid (procinfo
*pi
)
2396 /* We should never have to apply this operation to any procinfo
2397 except the one for the main process. If that ever changes for
2398 any reason, then take out the following clause and replace it
2399 with one that makes sure the ctl_fd is open. */
2402 pi
= find_procinfo_or_die (pi
->pid
, 0);
2404 if (!pi
->status_valid
)
2405 if (!proc_get_status (pi
))
2408 return pi
->prstatus
.pr_ppid
;
2411 /* Convert a target address (a.k.a. CORE_ADDR) into a host address
2412 (a.k.a void pointer)! */
2414 #if (defined (PCWATCH) || defined (PIOCSWATCH)) \
2415 && !(defined (PIOCOPENLWP))
2417 procfs_address_to_host_pointer (CORE_ADDR addr
)
2419 struct type
*ptr_type
= builtin_type (target_gdbarch ())->builtin_data_ptr
;
2422 gdb_assert (sizeof (ptr
) == TYPE_LENGTH (ptr_type
));
2423 gdbarch_address_to_pointer (target_gdbarch (), ptr_type
,
2424 (gdb_byte
*) &ptr
, addr
);
2430 proc_set_watchpoint (procinfo
*pi
, CORE_ADDR addr
, int len
, int wflags
)
2432 #if !defined (PCWATCH) && !defined (PIOCSWATCH)
2433 /* If neither or these is defined, we can't support watchpoints.
2434 This just avoids possibly failing to compile the below on such
2438 /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */
2439 #if defined (PIOCOPENLWP) /* Solaris 2.5: bail out. */
2444 char watch
[sizeof (prwatch_t
)];
2448 /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to
2449 convert a target address into something that can be stored in a
2450 native data structure. */
2451 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
2452 pwatch
.pr_vaddr
= (uintptr_t) procfs_address_to_host_pointer (addr
);
2454 pwatch
.pr_vaddr
= (caddr_t
) procfs_address_to_host_pointer (addr
);
2456 pwatch
.pr_size
= len
;
2457 pwatch
.pr_wflags
= wflags
;
2458 #if defined(NEW_PROC_API) && defined (PCWATCH)
2460 memcpy (arg
.watch
, &pwatch
, sizeof (prwatch_t
));
2461 return (write (pi
->ctl_fd
, &arg
, sizeof (arg
)) == sizeof (arg
));
2463 #if defined (PIOCSWATCH)
2464 return (ioctl (pi
->ctl_fd
, PIOCSWATCH
, &pwatch
) >= 0);
2466 return 0; /* Fail */
2473 #if (defined(__i386__) || defined(__x86_64__)) && defined (sun)
2475 #include <sys/sysi86.h>
2477 /* The KEY is actually the value of the lower 16 bits of the GS
2478 register for the LWP that we're interested in. Returns the
2479 matching ssh struct (LDT entry). */
2482 proc_get_LDT_entry (procinfo
*pi
, int key
)
2484 static struct ssd
*ldt_entry
= NULL
;
2486 char pathname
[MAX_PROC_NAME_SIZE
];
2487 struct cleanup
*old_chain
= NULL
;
2490 /* Allocate space for one LDT entry.
2491 This alloc must persist, because we return a pointer to it. */
2492 if (ldt_entry
== NULL
)
2493 ldt_entry
= XNEW (struct ssd
);
2495 /* Open the file descriptor for the LDT table. */
2496 sprintf (pathname
, "/proc/%d/ldt", pi
->pid
);
2497 if ((fd
= open_with_retry (pathname
, O_RDONLY
)) < 0)
2499 proc_warn (pi
, "proc_get_LDT_entry (open)", __LINE__
);
2502 /* Make sure it gets closed again! */
2503 old_chain
= make_cleanup_close (fd
);
2505 /* Now 'read' thru the table, find a match and return it. */
2506 while (read (fd
, ldt_entry
, sizeof (struct ssd
)) == sizeof (struct ssd
))
2508 if (ldt_entry
->sel
== 0 &&
2509 ldt_entry
->bo
== 0 &&
2510 ldt_entry
->acc1
== 0 &&
2511 ldt_entry
->acc2
== 0)
2512 break; /* end of table */
2513 /* If key matches, return this entry. */
2514 if (ldt_entry
->sel
== key
)
2517 /* Loop ended, match not found. */
2521 static int nalloc
= 0;
2523 /* Get the number of LDT entries. */
2524 if (ioctl (pi
->ctl_fd
, PIOCNLDT
, &nldt
) < 0)
2526 proc_warn (pi
, "proc_get_LDT_entry (PIOCNLDT)", __LINE__
);
2530 /* Allocate space for the number of LDT entries. */
2531 /* This alloc has to persist, 'cause we return a pointer to it. */
2534 ldt_entry
= (struct ssd
*)
2535 xrealloc (ldt_entry
, (nldt
+ 1) * sizeof (struct ssd
));
2539 /* Read the whole table in one gulp. */
2540 if (ioctl (pi
->ctl_fd
, PIOCLDT
, ldt_entry
) < 0)
2542 proc_warn (pi
, "proc_get_LDT_entry (PIOCLDT)", __LINE__
);
2546 /* Search the table and return the (first) entry matching 'key'. */
2547 for (i
= 0; i
< nldt
; i
++)
2548 if (ldt_entry
[i
].sel
== key
)
2549 return &ldt_entry
[i
];
2551 /* Loop ended, match not found. */
2556 /* Returns the pointer to the LDT entry of PTID. */
2559 procfs_find_LDT_entry (ptid_t ptid
)
2561 gdb_gregset_t
*gregs
;
2565 /* Find procinfo for the lwp. */
2566 if ((pi
= find_procinfo (ptid_get_pid (ptid
), ptid_get_lwp (ptid
))) == NULL
)
2568 warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."),
2569 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
2572 /* get its general registers. */
2573 if ((gregs
= proc_get_gregs (pi
)) == NULL
)
2575 warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."),
2576 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
2579 /* Now extract the GS register's lower 16 bits. */
2580 key
= (*gregs
)[GS
] & 0xffff;
2582 /* Find the matching entry and return it. */
2583 return proc_get_LDT_entry (pi
, key
);
2588 /* =============== END, non-thread part of /proc "MODULE" =============== */
2590 /* =================== Thread "MODULE" =================== */
2592 /* NOTE: you'll see more ifdefs and duplication of functions here,
2593 since there is a different way to do threads on every OS. */
2595 /* Returns the number of threads for the process. */
2597 #if defined (PIOCNTHR) && defined (PIOCTLIST)
2600 proc_get_nthreads (procinfo
*pi
)
2604 if (ioctl (pi
->ctl_fd
, PIOCNTHR
, &nthreads
) < 0)
2605 proc_warn (pi
, "procfs: PIOCNTHR failed", __LINE__
);
2611 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
2612 /* Solaris version */
2614 proc_get_nthreads (procinfo
*pi
)
2616 if (!pi
->status_valid
)
2617 if (!proc_get_status (pi
))
2620 /* NEW_PROC_API: only works for the process procinfo, because the
2621 LWP procinfos do not get prstatus filled in. */
2623 if (pi
->tid
!= 0) /* Find the parent process procinfo. */
2624 pi
= find_procinfo_or_die (pi
->pid
, 0);
2626 return pi
->prstatus
.pr_nlwp
;
2630 /* Default version */
2632 proc_get_nthreads (procinfo
*pi
)
2641 Return the ID of the thread that had an event of interest.
2642 (ie. the one that hit a breakpoint or other traced event). All
2643 other things being equal, this should be the ID of a thread that is
2644 currently executing. */
2646 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
2647 /* Solaris version */
2649 proc_get_current_thread (procinfo
*pi
)
2651 /* Note: this should be applied to the root procinfo for the
2652 process, not to the procinfo for an LWP. If applied to the
2653 procinfo for an LWP, it will simply return that LWP's ID. In
2654 that case, find the parent process procinfo. */
2657 pi
= find_procinfo_or_die (pi
->pid
, 0);
2659 if (!pi
->status_valid
)
2660 if (!proc_get_status (pi
))
2664 return pi
->prstatus
.pr_lwp
.pr_lwpid
;
2666 return pi
->prstatus
.pr_who
;
2671 #if defined (PIOCNTHR) && defined (PIOCTLIST)
2674 proc_get_current_thread (procinfo
*pi
)
2676 #if 0 /* FIXME: not ready for prime time? */
2677 return pi
->prstatus
.pr_tid
;
2684 /* Default version */
2686 proc_get_current_thread (procinfo
*pi
)
2694 /* Discover the IDs of all the threads within the process, and create
2695 a procinfo for each of them (chained to the parent). This
2696 unfortunately requires a different method on every OS. Returns
2697 non-zero for success, zero for failure. */
2700 proc_delete_dead_threads (procinfo
*parent
, procinfo
*thread
, void *ignore
)
2702 if (thread
&& parent
) /* sanity */
2704 thread
->status_valid
= 0;
2705 if (!proc_get_status (thread
))
2706 destroy_one_procinfo (&parent
->thread_list
, thread
);
2708 return 0; /* keep iterating */
2711 #if defined (PIOCLSTATUS)
2712 /* Solaris 2.5 (ioctl) version */
2714 proc_update_threads (procinfo
*pi
)
2716 gdb_prstatus_t
*prstatus
;
2717 struct cleanup
*old_chain
= NULL
;
2721 /* We should never have to apply this operation to any procinfo
2722 except the one for the main process. If that ever changes for
2723 any reason, then take out the following clause and replace it
2724 with one that makes sure the ctl_fd is open. */
2727 pi
= find_procinfo_or_die (pi
->pid
, 0);
2729 proc_iterate_over_threads (pi
, proc_delete_dead_threads
, NULL
);
2731 if ((nlwp
= proc_get_nthreads (pi
)) <= 1)
2732 return 1; /* Process is not multi-threaded; nothing to do. */
2734 prstatus
= XNEWVEC (gdb_prstatus_t
, nlwp
+ 1);
2736 old_chain
= make_cleanup (xfree
, prstatus
);
2737 if (ioctl (pi
->ctl_fd
, PIOCLSTATUS
, prstatus
) < 0)
2738 proc_error (pi
, "update_threads (PIOCLSTATUS)", __LINE__
);
2740 /* Skip element zero, which represents the process as a whole. */
2741 for (i
= 1; i
< nlwp
+ 1; i
++)
2743 if ((thread
= create_procinfo (pi
->pid
, prstatus
[i
].pr_who
)) == NULL
)
2744 proc_error (pi
, "update_threads, create_procinfo", __LINE__
);
2746 memcpy (&thread
->prstatus
, &prstatus
[i
], sizeof (*prstatus
));
2747 thread
->status_valid
= 1;
2749 pi
->threads_valid
= 1;
2750 do_cleanups (old_chain
);
2755 /* Solaris 6 (and later) version. */
2757 do_closedir_cleanup (void *dir
)
2763 proc_update_threads (procinfo
*pi
)
2765 char pathname
[MAX_PROC_NAME_SIZE
+ 16];
2766 struct dirent
*direntry
;
2767 struct cleanup
*old_chain
= NULL
;
2772 /* We should never have to apply this operation to any procinfo
2773 except the one for the main process. If that ever changes for
2774 any reason, then take out the following clause and replace it
2775 with one that makes sure the ctl_fd is open. */
2778 pi
= find_procinfo_or_die (pi
->pid
, 0);
2780 proc_iterate_over_threads (pi
, proc_delete_dead_threads
, NULL
);
2782 /* Note: this brute-force method was originally devised for Unixware
2783 (support removed since), and will also work on Solaris 2.6 and
2784 2.7. The original comment mentioned the existence of a much
2785 simpler and more elegant way to do this on Solaris, but didn't
2786 point out what that was. */
2788 strcpy (pathname
, pi
->pathname
);
2789 strcat (pathname
, "/lwp");
2790 if ((dirp
= opendir (pathname
)) == NULL
)
2791 proc_error (pi
, "update_threads, opendir", __LINE__
);
2793 old_chain
= make_cleanup (do_closedir_cleanup
, dirp
);
2794 while ((direntry
= readdir (dirp
)) != NULL
)
2795 if (direntry
->d_name
[0] != '.') /* skip '.' and '..' */
2797 lwpid
= atoi (&direntry
->d_name
[0]);
2798 if ((thread
= create_procinfo (pi
->pid
, lwpid
)) == NULL
)
2799 proc_error (pi
, "update_threads, create_procinfo", __LINE__
);
2801 pi
->threads_valid
= 1;
2802 do_cleanups (old_chain
);
2809 proc_update_threads (procinfo
*pi
)
2814 /* We should never have to apply this operation to any procinfo
2815 except the one for the main process. If that ever changes for
2816 any reason, then take out the following clause and replace it
2817 with one that makes sure the ctl_fd is open. */
2820 pi
= find_procinfo_or_die (pi
->pid
, 0);
2822 proc_iterate_over_threads (pi
, proc_delete_dead_threads
, NULL
);
2824 nthreads
= proc_get_nthreads (pi
);
2826 return 0; /* Nothing to do for 1 or fewer threads. */
2828 threads
= XNEWVEC (tid_t
, nthreads
);
2830 if (ioctl (pi
->ctl_fd
, PIOCTLIST
, threads
) < 0)
2831 proc_error (pi
, "procfs: update_threads (PIOCTLIST)", __LINE__
);
2833 for (i
= 0; i
< nthreads
; i
++)
2835 if (!find_procinfo (pi
->pid
, threads
[i
]))
2836 if (!create_procinfo (pi
->pid
, threads
[i
]))
2837 proc_error (pi
, "update_threads, create_procinfo", __LINE__
);
2839 pi
->threads_valid
= 1;
2843 /* Default version */
2845 proc_update_threads (procinfo
*pi
)
2849 #endif /* OSF PIOCTLIST */
2850 #endif /* NEW_PROC_API */
2851 #endif /* SOL 2.5 PIOCLSTATUS */
2853 /* Given a pointer to a function, call that function once for each lwp
2854 in the procinfo list, until the function returns non-zero, in which
2855 event return the value returned by the function.
2857 Note: this function does NOT call update_threads. If you want to
2858 discover new threads first, you must call that function explicitly.
2859 This function just makes a quick pass over the currently-known
2862 PI is the parent process procinfo. FUNC is the per-thread
2863 function. PTR is an opaque parameter for function. Returns the
2864 first non-zero return value from the callee, or zero. */
2867 proc_iterate_over_threads (procinfo
*pi
,
2868 int (*func
) (procinfo
*, procinfo
*, void *),
2871 procinfo
*thread
, *next
;
2874 /* We should never have to apply this operation to any procinfo
2875 except the one for the main process. If that ever changes for
2876 any reason, then take out the following clause and replace it
2877 with one that makes sure the ctl_fd is open. */
2880 pi
= find_procinfo_or_die (pi
->pid
, 0);
2882 for (thread
= pi
->thread_list
; thread
!= NULL
; thread
= next
)
2884 next
= thread
->next
; /* In case thread is destroyed. */
2885 if ((retval
= (*func
) (pi
, thread
, ptr
)) != 0)
2892 /* =================== END, Thread "MODULE" =================== */
2894 /* =================== END, /proc "MODULE" =================== */
2896 /* =================== GDB "MODULE" =================== */
2898 /* Here are all of the gdb target vector functions and their
2901 static ptid_t
do_attach (ptid_t ptid
);
2902 static void do_detach (int signo
);
2903 static void proc_trace_syscalls_1 (procinfo
*pi
, int syscallnum
,
2904 int entry_or_exit
, int mode
, int from_tty
);
2906 /* Sets up the inferior to be debugged. Registers to trace signals,
2907 hardware faults, and syscalls. Note: does not set RLC flag: caller
2908 may want to customize that. Returns zero for success (note!
2909 unlike most functions in this module); on failure, returns the LINE
2910 NUMBER where it failed! */
2913 procfs_debug_inferior (procinfo
*pi
)
2915 fltset_t traced_faults
;
2916 gdb_sigset_t traced_signals
;
2917 sysset_t
*traced_syscall_entries
;
2918 sysset_t
*traced_syscall_exits
;
2921 /* Register to trace hardware faults in the child. */
2922 prfillset (&traced_faults
); /* trace all faults... */
2923 gdb_prdelset (&traced_faults
, FLTPAGE
); /* except page fault. */
2924 if (!proc_set_traced_faults (pi
, &traced_faults
))
2927 /* Initially, register to trace all signals in the child. */
2928 prfillset (&traced_signals
);
2929 if (!proc_set_traced_signals (pi
, &traced_signals
))
2933 /* Register to trace the 'exit' system call (on entry). */
2934 traced_syscall_entries
= sysset_t_alloc (pi
);
2935 gdb_premptysysset (traced_syscall_entries
);
2937 gdb_praddsysset (traced_syscall_entries
, SYS_exit
);
2940 gdb_praddsysset (traced_syscall_entries
, SYS_lwpexit
);/* And _lwp_exit... */
2943 gdb_praddsysset (traced_syscall_entries
, SYS_lwp_exit
);
2945 #ifdef DYNAMIC_SYSCALLS
2947 int callnum
= find_syscall (pi
, "_exit");
2950 gdb_praddsysset (traced_syscall_entries
, callnum
);
2954 status
= proc_set_traced_sysentry (pi
, traced_syscall_entries
);
2955 xfree (traced_syscall_entries
);
2959 #ifdef PRFS_STOPEXEC /* defined on OSF */
2960 /* OSF method for tracing exec syscalls. Quoting:
2961 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2962 exits from exec system calls because of the user level loader. */
2963 /* FIXME: make nice and maybe move into an access function. */
2967 if (ioctl (pi
->ctl_fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
2970 prfs_flags
|= PRFS_STOPEXEC
;
2972 if (ioctl (pi
->ctl_fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
2975 #else /* not PRFS_STOPEXEC */
2976 /* Everyone else's (except OSF) method for tracing exec syscalls. */
2978 Not all systems with /proc have all the exec* syscalls with the same
2979 names. On the SGI, for example, there is no SYS_exec, but there
2980 *is* a SYS_execv. So, we try to account for that. */
2982 traced_syscall_exits
= sysset_t_alloc (pi
);
2983 gdb_premptysysset (traced_syscall_exits
);
2985 gdb_praddsysset (traced_syscall_exits
, SYS_exec
);
2988 gdb_praddsysset (traced_syscall_exits
, SYS_execve
);
2991 gdb_praddsysset (traced_syscall_exits
, SYS_execv
);
2994 #ifdef SYS_lwpcreate
2995 gdb_praddsysset (traced_syscall_exits
, SYS_lwpcreate
);
2996 gdb_praddsysset (traced_syscall_exits
, SYS_lwpexit
);
2999 #ifdef SYS_lwp_create /* FIXME: once only, please. */
3000 gdb_praddsysset (traced_syscall_exits
, SYS_lwp_create
);
3001 gdb_praddsysset (traced_syscall_exits
, SYS_lwp_exit
);
3004 #ifdef DYNAMIC_SYSCALLS
3006 int callnum
= find_syscall (pi
, "execve");
3009 gdb_praddsysset (traced_syscall_exits
, callnum
);
3010 callnum
= find_syscall (pi
, "ra_execve");
3012 gdb_praddsysset (traced_syscall_exits
, callnum
);
3016 status
= proc_set_traced_sysexit (pi
, traced_syscall_exits
);
3017 xfree (traced_syscall_exits
);
3021 #endif /* PRFS_STOPEXEC */
3026 procfs_attach (struct target_ops
*ops
, const char *args
, int from_tty
)
3031 pid
= parse_pid_to_attach (args
);
3033 if (pid
== getpid ())
3034 error (_("Attaching GDB to itself is not a good idea..."));
3038 exec_file
= get_exec_file (0);
3041 printf_filtered (_("Attaching to program `%s', %s\n"),
3042 exec_file
, target_pid_to_str (pid_to_ptid (pid
)));
3044 printf_filtered (_("Attaching to %s\n"),
3045 target_pid_to_str (pid_to_ptid (pid
)));
3049 inferior_ptid
= do_attach (pid_to_ptid (pid
));
3050 if (!target_is_pushed (ops
))
3055 procfs_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
3058 int pid
= ptid_get_pid (inferior_ptid
);
3067 exec_file
= get_exec_file (0);
3068 if (exec_file
== NULL
)
3071 printf_filtered (_("Detaching from program: %s, %s\n"), exec_file
,
3072 target_pid_to_str (pid_to_ptid (pid
)));
3073 gdb_flush (gdb_stdout
);
3078 inferior_ptid
= null_ptid
;
3079 detach_inferior (pid
);
3080 inf_child_maybe_unpush_target (ops
);
3084 do_attach (ptid_t ptid
)
3087 struct inferior
*inf
;
3091 if ((pi
= create_procinfo (ptid_get_pid (ptid
), 0)) == NULL
)
3092 perror (_("procfs: out of memory in 'attach'"));
3094 if (!open_procinfo_files (pi
, FD_CTL
))
3096 fprintf_filtered (gdb_stderr
, "procfs:%d -- ", __LINE__
);
3097 sprintf (errmsg
, "do_attach: couldn't open /proc file for process %d",
3098 ptid_get_pid (ptid
));
3099 dead_procinfo (pi
, errmsg
, NOKILL
);
3102 /* Stop the process (if it isn't already stopped). */
3103 if (proc_flags (pi
) & (PR_STOPPED
| PR_ISTOP
))
3105 pi
->was_stopped
= 1;
3106 proc_prettyprint_why (proc_why (pi
), proc_what (pi
), 1);
3110 pi
->was_stopped
= 0;
3111 /* Set the process to run again when we close it. */
3112 if (!proc_set_run_on_last_close (pi
))
3113 dead_procinfo (pi
, "do_attach: couldn't set RLC.", NOKILL
);
3115 /* Now stop the process. */
3116 if (!proc_stop_process (pi
))
3117 dead_procinfo (pi
, "do_attach: couldn't stop the process.", NOKILL
);
3118 pi
->ignore_next_sigstop
= 1;
3120 /* Save some of the /proc state to be restored if we detach. */
3121 if (!proc_get_traced_faults (pi
, &pi
->saved_fltset
))
3122 dead_procinfo (pi
, "do_attach: couldn't save traced faults.", NOKILL
);
3123 if (!proc_get_traced_signals (pi
, &pi
->saved_sigset
))
3124 dead_procinfo (pi
, "do_attach: couldn't save traced signals.", NOKILL
);
3125 if (!proc_get_traced_sysentry (pi
, pi
->saved_entryset
))
3126 dead_procinfo (pi
, "do_attach: couldn't save traced syscall entries.",
3128 if (!proc_get_traced_sysexit (pi
, pi
->saved_exitset
))
3129 dead_procinfo (pi
, "do_attach: couldn't save traced syscall exits.",
3131 if (!proc_get_held_signals (pi
, &pi
->saved_sighold
))
3132 dead_procinfo (pi
, "do_attach: couldn't save held signals.", NOKILL
);
3134 if ((fail
= procfs_debug_inferior (pi
)) != 0)
3135 dead_procinfo (pi
, "do_attach: failed in procfs_debug_inferior", NOKILL
);
3137 inf
= current_inferior ();
3138 inferior_appeared (inf
, pi
->pid
);
3139 /* Let GDB know that the inferior was attached. */
3140 inf
->attach_flag
= 1;
3142 /* Create a procinfo for the current lwp. */
3143 lwpid
= proc_get_current_thread (pi
);
3144 create_procinfo (pi
->pid
, lwpid
);
3146 /* Add it to gdb's thread list. */
3147 ptid
= ptid_build (pi
->pid
, lwpid
, 0);
3154 do_detach (int signo
)
3158 /* Find procinfo for the main process. */
3159 pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
),
3160 0); /* FIXME: threads */
3162 if (!proc_set_current_signal (pi
, signo
))
3163 proc_warn (pi
, "do_detach, set_current_signal", __LINE__
);
3165 if (!proc_set_traced_signals (pi
, &pi
->saved_sigset
))
3166 proc_warn (pi
, "do_detach, set_traced_signal", __LINE__
);
3168 if (!proc_set_traced_faults (pi
, &pi
->saved_fltset
))
3169 proc_warn (pi
, "do_detach, set_traced_faults", __LINE__
);
3171 if (!proc_set_traced_sysentry (pi
, pi
->saved_entryset
))
3172 proc_warn (pi
, "do_detach, set_traced_sysentry", __LINE__
);
3174 if (!proc_set_traced_sysexit (pi
, pi
->saved_exitset
))
3175 proc_warn (pi
, "do_detach, set_traced_sysexit", __LINE__
);
3177 if (!proc_set_held_signals (pi
, &pi
->saved_sighold
))
3178 proc_warn (pi
, "do_detach, set_held_signals", __LINE__
);
3180 if (signo
|| (proc_flags (pi
) & (PR_STOPPED
| PR_ISTOP
)))
3181 if (signo
|| !(pi
->was_stopped
) ||
3182 query (_("Was stopped when attached, make it runnable again? ")))
3184 /* Clear any pending signal. */
3185 if (!proc_clear_current_fault (pi
))
3186 proc_warn (pi
, "do_detach, clear_current_fault", __LINE__
);
3188 if (signo
== 0 && !proc_clear_current_signal (pi
))
3189 proc_warn (pi
, "do_detach, clear_current_signal", __LINE__
);
3191 if (!proc_set_run_on_last_close (pi
))
3192 proc_warn (pi
, "do_detach, set_rlc", __LINE__
);
3195 destroy_procinfo (pi
);
3198 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
3201 ??? Is the following note still relevant? We can't get individual
3202 registers with the PT_GETREGS ptrace(2) request either, yet we
3203 don't bother with caching at all in that case.
3205 NOTE: Since the /proc interface cannot give us individual
3206 registers, we pay no attention to REGNUM, and just fetch them all.
3207 This results in the possibility that we will do unnecessarily many
3208 fetches, since we may be called repeatedly for individual
3209 registers. So we cache the results, and mark the cache invalid
3210 when the process is resumed. */
3213 procfs_fetch_registers (struct target_ops
*ops
,
3214 struct regcache
*regcache
, int regnum
)
3216 gdb_gregset_t
*gregs
;
3218 int pid
= ptid_get_pid (inferior_ptid
);
3219 int tid
= ptid_get_lwp (inferior_ptid
);
3220 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3222 pi
= find_procinfo_or_die (pid
, tid
);
3225 error (_("procfs: fetch_registers failed to find procinfo for %s"),
3226 target_pid_to_str (inferior_ptid
));
3228 gregs
= proc_get_gregs (pi
);
3230 proc_error (pi
, "fetch_registers, get_gregs", __LINE__
);
3232 supply_gregset (regcache
, (const gdb_gregset_t
*) gregs
);
3234 if (gdbarch_fp0_regnum (gdbarch
) >= 0) /* Do we have an FPU? */
3236 gdb_fpregset_t
*fpregs
;
3238 if ((regnum
>= 0 && regnum
< gdbarch_fp0_regnum (gdbarch
))
3239 || regnum
== gdbarch_pc_regnum (gdbarch
)
3240 || regnum
== gdbarch_sp_regnum (gdbarch
))
3241 return; /* Not a floating point register. */
3243 fpregs
= proc_get_fpregs (pi
);
3245 proc_error (pi
, "fetch_registers, get_fpregs", __LINE__
);
3247 supply_fpregset (regcache
, (const gdb_fpregset_t
*) fpregs
);
3251 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
3252 this for all registers.
3254 NOTE: Since the /proc interface will not read individual registers,
3255 we will cache these requests until the process is resumed, and only
3256 then write them back to the inferior process.
3258 FIXME: is that a really bad idea? Have to think about cases where
3259 writing one register might affect the value of others, etc. */
3262 procfs_store_registers (struct target_ops
*ops
,
3263 struct regcache
*regcache
, int regnum
)
3265 gdb_gregset_t
*gregs
;
3267 int pid
= ptid_get_pid (inferior_ptid
);
3268 int tid
= ptid_get_lwp (inferior_ptid
);
3269 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3271 pi
= find_procinfo_or_die (pid
, tid
);
3274 error (_("procfs: store_registers: failed to find procinfo for %s"),
3275 target_pid_to_str (inferior_ptid
));
3277 gregs
= proc_get_gregs (pi
);
3279 proc_error (pi
, "store_registers, get_gregs", __LINE__
);
3281 fill_gregset (regcache
, gregs
, regnum
);
3282 if (!proc_set_gregs (pi
))
3283 proc_error (pi
, "store_registers, set_gregs", __LINE__
);
3285 if (gdbarch_fp0_regnum (gdbarch
) >= 0) /* Do we have an FPU? */
3287 gdb_fpregset_t
*fpregs
;
3289 if ((regnum
>= 0 && regnum
< gdbarch_fp0_regnum (gdbarch
))
3290 || regnum
== gdbarch_pc_regnum (gdbarch
)
3291 || regnum
== gdbarch_sp_regnum (gdbarch
))
3292 return; /* Not a floating point register. */
3294 fpregs
= proc_get_fpregs (pi
);
3296 proc_error (pi
, "store_registers, get_fpregs", __LINE__
);
3298 fill_fpregset (regcache
, fpregs
, regnum
);
3299 if (!proc_set_fpregs (pi
))
3300 proc_error (pi
, "store_registers, set_fpregs", __LINE__
);
3305 syscall_is_lwp_exit (procinfo
*pi
, int scall
)
3308 if (scall
== SYS_lwp_exit
)
3312 if (scall
== SYS_lwpexit
)
3319 syscall_is_exit (procinfo
*pi
, int scall
)
3322 if (scall
== SYS_exit
)
3325 #ifdef DYNAMIC_SYSCALLS
3326 if (find_syscall (pi
, "_exit") == scall
)
3333 syscall_is_exec (procinfo
*pi
, int scall
)
3336 if (scall
== SYS_exec
)
3340 if (scall
== SYS_execv
)
3344 if (scall
== SYS_execve
)
3347 #ifdef DYNAMIC_SYSCALLS
3348 if (find_syscall (pi
, "_execve"))
3350 if (find_syscall (pi
, "ra_execve"))
3357 syscall_is_lwp_create (procinfo
*pi
, int scall
)
3359 #ifdef SYS_lwp_create
3360 if (scall
== SYS_lwp_create
)
3363 #ifdef SYS_lwpcreate
3364 if (scall
== SYS_lwpcreate
)
3371 /* Return the address of the __dbx_link() function in the file
3372 refernced by ABFD by scanning its symbol table. Return 0 if
3373 the symbol was not found. */
3376 dbx_link_addr (bfd
*abfd
)
3378 long storage_needed
;
3379 asymbol
**symbol_table
;
3380 long number_of_symbols
;
3383 storage_needed
= bfd_get_symtab_upper_bound (abfd
);
3384 if (storage_needed
<= 0)
3387 symbol_table
= (asymbol
**) xmalloc (storage_needed
);
3388 make_cleanup (xfree
, symbol_table
);
3390 number_of_symbols
= bfd_canonicalize_symtab (abfd
, symbol_table
);
3392 for (i
= 0; i
< number_of_symbols
; i
++)
3394 asymbol
*sym
= symbol_table
[i
];
3396 if ((sym
->flags
& BSF_GLOBAL
)
3397 && sym
->name
!= NULL
&& strcmp (sym
->name
, "__dbx_link") == 0)
3398 return (sym
->value
+ sym
->section
->vma
);
3401 /* Symbol not found, return NULL. */
3405 /* Search the symbol table of the file referenced by FD for a symbol
3406 named __dbx_link(). If found, then insert a breakpoint at this location,
3407 and return nonzero. Return zero otherwise. */
3410 insert_dbx_link_bpt_in_file (int fd
, CORE_ADDR ignored
)
3413 long storage_needed
;
3416 abfd
= gdb_bfd_fdopenr ("unamed", 0, fd
);
3419 warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ()));
3423 if (!bfd_check_format (abfd
, bfd_object
))
3425 /* Not the correct format, so we can not possibly find the dbx_link
3427 gdb_bfd_unref (abfd
);
3431 sym_addr
= dbx_link_addr (abfd
);
3434 struct breakpoint
*dbx_link_bpt
;
3436 /* Insert the breakpoint. */
3438 = create_and_insert_solib_event_breakpoint (target_gdbarch (),
3440 if (dbx_link_bpt
== NULL
)
3442 warning (_("Failed to insert dbx_link breakpoint."));
3443 gdb_bfd_unref (abfd
);
3446 gdb_bfd_unref (abfd
);
3450 gdb_bfd_unref (abfd
);
3454 /* Calls the supplied callback function once for each mapped address
3455 space in the process. The callback function receives an open file
3456 descriptor for the file corresponding to that mapped address space
3457 (if there is one), and the base address of the mapped space. Quit
3458 when the callback function returns a nonzero value, or at teh end
3459 of the mappings. Returns the first non-zero return value of the
3460 callback function, or zero. */
3463 solib_mappings_callback (struct prmap
*map
, int (*func
) (int, CORE_ADDR
),
3466 procinfo
*pi
= data
;
3470 char name
[MAX_PROC_NAME_SIZE
+ sizeof (map
->pr_mapname
)];
3472 if (map
->pr_vaddr
== 0 && map
->pr_size
== 0)
3473 return -1; /* sanity */
3475 if (map
->pr_mapname
[0] == 0)
3477 fd
= -1; /* no map file */
3481 sprintf (name
, "/proc/%d/object/%s", pi
->pid
, map
->pr_mapname
);
3482 /* Note: caller's responsibility to close this fd! */
3483 fd
= open_with_retry (name
, O_RDONLY
);
3484 /* Note: we don't test the above call for failure;
3485 we just pass the FD on as given. Sometimes there is
3486 no file, so the open may return failure, but that's
3490 fd
= ioctl (pi
->ctl_fd
, PIOCOPENM
, &map
->pr_vaddr
);
3491 /* Note: we don't test the above call for failure;
3492 we just pass the FD on as given. Sometimes there is
3493 no file, so the ioctl may return failure, but that's
3496 return (*func
) (fd
, (CORE_ADDR
) map
->pr_vaddr
);
3499 /* If the given memory region MAP contains a symbol named __dbx_link,
3500 insert a breakpoint at this location and return nonzero. Return
3504 insert_dbx_link_bpt_in_region (struct prmap
*map
,
3505 find_memory_region_ftype child_func
,
3508 procinfo
*pi
= (procinfo
*) data
;
3510 /* We know the symbol we're looking for is in a text region, so
3511 only look for it if the region is a text one. */
3512 if (map
->pr_mflags
& MA_EXEC
)
3513 return solib_mappings_callback (map
, insert_dbx_link_bpt_in_file
, pi
);
3518 /* Search all memory regions for a symbol named __dbx_link. If found,
3519 insert a breakpoint at its location, and return nonzero. Return zero
3523 insert_dbx_link_breakpoint (procinfo
*pi
)
3525 return iterate_over_mappings (pi
, NULL
, pi
, insert_dbx_link_bpt_in_region
);
3529 /* Retrieve the next stop event from the child process. If child has
3530 not stopped yet, wait for it to stop. Translate /proc eventcodes
3531 (or possibly wait eventcodes) into gdb internal event codes.
3532 Returns the id of process (and possibly thread) that incurred the
3533 event. Event codes are returned through a pointer parameter. */
3536 procfs_wait (struct target_ops
*ops
,
3537 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
3539 /* First cut: loosely based on original version 2.1. */
3543 ptid_t retval
, temp_ptid
;
3544 int why
, what
, flags
;
3551 retval
= pid_to_ptid (-1);
3553 /* Find procinfo for main process. */
3554 pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
3557 /* We must assume that the status is stale now... */
3558 pi
->status_valid
= 0;
3559 pi
->gregs_valid
= 0;
3560 pi
->fpregs_valid
= 0;
3562 #if 0 /* just try this out... */
3563 flags
= proc_flags (pi
);
3564 why
= proc_why (pi
);
3565 if ((flags
& PR_STOPPED
) && (why
== PR_REQUESTED
))
3566 pi
->status_valid
= 0; /* re-read again, IMMEDIATELY... */
3568 /* If child is not stopped, wait for it to stop. */
3569 if (!(proc_flags (pi
) & (PR_STOPPED
| PR_ISTOP
)) &&
3570 !proc_wait_for_stop (pi
))
3572 /* wait_for_stop failed: has the child terminated? */
3573 if (errno
== ENOENT
)
3577 /* /proc file not found; presumably child has terminated. */
3578 wait_retval
= wait (&wstat
); /* "wait" for the child's exit. */
3581 if (wait_retval
!= ptid_get_pid (inferior_ptid
))
3582 error (_("procfs: couldn't stop "
3583 "process %d: wait returned %d."),
3584 ptid_get_pid (inferior_ptid
), wait_retval
);
3585 /* FIXME: might I not just use waitpid?
3586 Or try find_procinfo to see if I know about this child? */
3587 retval
= pid_to_ptid (wait_retval
);
3589 else if (errno
== EINTR
)
3593 /* Unknown error from wait_for_stop. */
3594 proc_error (pi
, "target_wait (wait_for_stop)", __LINE__
);
3599 /* This long block is reached if either:
3600 a) the child was already stopped, or
3601 b) we successfully waited for the child with wait_for_stop.
3602 This block will analyze the /proc status, and translate it
3603 into a waitstatus for GDB.
3605 If we actually had to call wait because the /proc file
3606 is gone (child terminated), then we skip this block,
3607 because we already have a waitstatus. */
3609 flags
= proc_flags (pi
);
3610 why
= proc_why (pi
);
3611 what
= proc_what (pi
);
3613 if (flags
& (PR_STOPPED
| PR_ISTOP
))
3616 /* If it's running async (for single_thread control),
3617 set it back to normal again. */
3618 if (flags
& PR_ASYNC
)
3619 if (!proc_unset_async (pi
))
3620 proc_error (pi
, "target_wait, unset_async", __LINE__
);
3624 proc_prettyprint_why (why
, what
, 1);
3626 /* The 'pid' we will return to GDB is composed of
3627 the process ID plus the lwp ID. */
3628 retval
= ptid_build (pi
->pid
, proc_get_current_thread (pi
), 0);
3632 wstat
= (what
<< 8) | 0177;
3635 if (syscall_is_lwp_exit (pi
, what
))
3637 if (print_thread_events
)
3638 printf_unfiltered (_("[%s exited]\n"),
3639 target_pid_to_str (retval
));
3640 delete_thread (retval
);
3641 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
3644 else if (syscall_is_exit (pi
, what
))
3646 struct inferior
*inf
;
3648 /* Handle SYS_exit call only. */
3649 /* Stopped at entry to SYS_exit.
3650 Make it runnable, resume it, then use
3651 the wait system call to get its exit code.
3652 Proc_run_process always clears the current
3654 Then return its exit status. */
3655 pi
->status_valid
= 0;
3657 /* FIXME: what we should do is return
3658 TARGET_WAITKIND_SPURIOUS. */
3659 if (!proc_run_process (pi
, 0, 0))
3660 proc_error (pi
, "target_wait, run_process", __LINE__
);
3662 inf
= find_inferior_pid (pi
->pid
);
3663 if (inf
->attach_flag
)
3665 /* Don't call wait: simulate waiting for exit,
3666 return a "success" exit code. Bogus: what if
3667 it returns something else? */
3669 retval
= inferior_ptid
; /* ? ? ? */
3673 int temp
= wait (&wstat
);
3675 /* FIXME: shouldn't I make sure I get the right
3676 event from the right process? If (for
3677 instance) I have killed an earlier inferior
3678 process but failed to clean up after it
3679 somehow, I could get its termination event
3682 /* If wait returns -1, that's what we return
3685 retval
= pid_to_ptid (temp
);
3690 printf_filtered (_("procfs: trapped on entry to "));
3691 proc_prettyprint_syscall (proc_what (pi
), 0);
3692 printf_filtered ("\n");
3695 long i
, nsysargs
, *sysargs
;
3697 if ((nsysargs
= proc_nsysarg (pi
)) > 0 &&
3698 (sysargs
= proc_sysargs (pi
)) != NULL
)
3700 printf_filtered (_("%ld syscall arguments:\n"),
3702 for (i
= 0; i
< nsysargs
; i
++)
3703 printf_filtered ("#%ld: 0x%08lx\n",
3711 /* How to exit gracefully, returning "unknown
3713 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
3714 return inferior_ptid
;
3718 /* How to keep going without returning to wfi: */
3719 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3725 if (syscall_is_exec (pi
, what
))
3727 /* Hopefully this is our own "fork-child" execing
3728 the real child. Hoax this event into a trap, and
3729 GDB will see the child about to execute its start
3731 wstat
= (SIGTRAP
<< 8) | 0177;
3734 else if (what
== SYS_syssgi
)
3736 /* see if we can break on dbx_link(). If yes, then
3737 we no longer need the SYS_syssgi notifications. */
3738 if (insert_dbx_link_breakpoint (pi
))
3739 proc_trace_syscalls_1 (pi
, SYS_syssgi
, PR_SYSEXIT
,
3742 /* This is an internal event and should be transparent
3743 to wfi, so resume the execution and wait again. See
3744 comment in procfs_init_inferior() for more details. */
3745 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3749 else if (syscall_is_lwp_create (pi
, what
))
3751 /* This syscall is somewhat like fork/exec. We
3752 will get the event twice: once for the parent
3753 LWP, and once for the child. We should already
3754 know about the parent LWP, but the child will
3755 be new to us. So, whenever we get this event,
3756 if it represents a new thread, simply add the
3757 thread to the list. */
3759 /* If not in procinfo list, add it. */
3760 temp_tid
= proc_get_current_thread (pi
);
3761 if (!find_procinfo (pi
->pid
, temp_tid
))
3762 create_procinfo (pi
->pid
, temp_tid
);
3764 temp_ptid
= ptid_build (pi
->pid
, temp_tid
, 0);
3765 /* If not in GDB's thread list, add it. */
3766 if (!in_thread_list (temp_ptid
))
3767 add_thread (temp_ptid
);
3769 /* Return to WFI, but tell it to immediately resume. */
3770 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
3771 return inferior_ptid
;
3773 else if (syscall_is_lwp_exit (pi
, what
))
3775 if (print_thread_events
)
3776 printf_unfiltered (_("[%s exited]\n"),
3777 target_pid_to_str (retval
));
3778 delete_thread (retval
);
3779 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
3784 /* FIXME: Do we need to handle SYS_sproc,
3785 SYS_fork, or SYS_vfork here? The old procfs
3786 seemed to use this event to handle threads on
3787 older (non-LWP) systems, where I'm assuming
3788 that threads were actually separate processes.
3789 Irix, maybe? Anyway, low priority for now. */
3793 printf_filtered (_("procfs: trapped on exit from "));
3794 proc_prettyprint_syscall (proc_what (pi
), 0);
3795 printf_filtered ("\n");
3798 long i
, nsysargs
, *sysargs
;
3800 if ((nsysargs
= proc_nsysarg (pi
)) > 0 &&
3801 (sysargs
= proc_sysargs (pi
)) != NULL
)
3803 printf_filtered (_("%ld syscall arguments:\n"),
3805 for (i
= 0; i
< nsysargs
; i
++)
3806 printf_filtered ("#%ld: 0x%08lx\n",
3811 status
->kind
= TARGET_WAITKIND_SPURIOUS
;
3812 return inferior_ptid
;
3817 wstat
= (SIGSTOP
<< 8) | 0177;
3822 printf_filtered (_("Retry #%d:\n"), retry
);
3823 pi
->status_valid
= 0;
3828 /* If not in procinfo list, add it. */
3829 temp_tid
= proc_get_current_thread (pi
);
3830 if (!find_procinfo (pi
->pid
, temp_tid
))
3831 create_procinfo (pi
->pid
, temp_tid
);
3833 /* If not in GDB's thread list, add it. */
3834 temp_ptid
= ptid_build (pi
->pid
, temp_tid
, 0);
3835 if (!in_thread_list (temp_ptid
))
3836 add_thread (temp_ptid
);
3838 status
->kind
= TARGET_WAITKIND_STOPPED
;
3839 status
->value
.sig
= 0;
3844 wstat
= (what
<< 8) | 0177;
3850 wstat
= (SIGTRAP
<< 8) | 0177;
3855 wstat
= (SIGTRAP
<< 8) | 0177;
3858 /* FIXME: use si_signo where possible. */
3860 #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */
3863 wstat
= (SIGILL
<< 8) | 0177;
3866 #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */
3869 wstat
= (SIGTRAP
<< 8) | 0177;
3873 #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */
3876 wstat
= (SIGSEGV
<< 8) | 0177;
3880 #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */
3883 wstat
= (SIGFPE
<< 8) | 0177;
3885 case FLTPAGE
: /* Recoverable page fault */
3886 default: /* FIXME: use si_signo if possible for
3888 retval
= pid_to_ptid (-1);
3889 printf_filtered ("procfs:%d -- ", __LINE__
);
3890 printf_filtered (_("child stopped for unknown reason:\n"));
3891 proc_prettyprint_why (why
, what
, 1);
3892 error (_("... giving up..."));
3895 break; /* case PR_FAULTED: */
3896 default: /* switch (why) unmatched */
3897 printf_filtered ("procfs:%d -- ", __LINE__
);
3898 printf_filtered (_("child stopped for unknown reason:\n"));
3899 proc_prettyprint_why (why
, what
, 1);
3900 error (_("... giving up..."));
3903 /* Got this far without error: If retval isn't in the
3904 threads database, add it. */
3905 if (ptid_get_pid (retval
) > 0 &&
3906 !ptid_equal (retval
, inferior_ptid
) &&
3907 !in_thread_list (retval
))
3909 /* We have a new thread. We need to add it both to
3910 GDB's list and to our own. If we don't create a
3911 procinfo, resume may be unhappy later. */
3912 add_thread (retval
);
3913 if (find_procinfo (ptid_get_pid (retval
),
3914 ptid_get_lwp (retval
)) == NULL
)
3915 create_procinfo (ptid_get_pid (retval
),
3916 ptid_get_lwp (retval
));
3919 else /* Flags do not indicate STOPPED. */
3921 /* surely this can't happen... */
3922 printf_filtered ("procfs:%d -- process not stopped.\n",
3924 proc_prettyprint_flags (flags
, 1);
3925 error (_("procfs: ...giving up..."));
3930 store_waitstatus (status
, wstat
);
3936 /* Perform a partial transfer to/from the specified object. For
3937 memory transfers, fall back to the old memory xfer functions. */
3939 static enum target_xfer_status
3940 procfs_xfer_partial (struct target_ops
*ops
, enum target_object object
,
3941 const char *annex
, gdb_byte
*readbuf
,
3942 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
3943 ULONGEST
*xfered_len
)
3947 case TARGET_OBJECT_MEMORY
:
3948 return procfs_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
3951 case TARGET_OBJECT_AUXV
:
3952 return memory_xfer_auxv (ops
, object
, annex
, readbuf
, writebuf
,
3953 offset
, len
, xfered_len
);
3957 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
3958 readbuf
, writebuf
, offset
, len
,
3963 /* Helper for procfs_xfer_partial that handles memory transfers.
3964 Arguments are like target_xfer_partial. */
3966 static enum target_xfer_status
3967 procfs_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
3968 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
3973 /* Find procinfo for main process. */
3974 pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
3975 if (pi
->as_fd
== 0 &&
3976 open_procinfo_files (pi
, FD_AS
) == 0)
3978 proc_warn (pi
, "xfer_memory, open_proc_files", __LINE__
);
3979 return TARGET_XFER_E_IO
;
3982 if (lseek (pi
->as_fd
, (off_t
) memaddr
, SEEK_SET
) != (off_t
) memaddr
)
3983 return TARGET_XFER_E_IO
;
3985 if (writebuf
!= NULL
)
3987 PROCFS_NOTE ("write memory:\n");
3988 nbytes
= write (pi
->as_fd
, writebuf
, len
);
3992 PROCFS_NOTE ("read memory:\n");
3993 nbytes
= read (pi
->as_fd
, readbuf
, len
);
3996 return TARGET_XFER_E_IO
;
3997 *xfered_len
= nbytes
;
3998 return TARGET_XFER_OK
;
4001 /* Called by target_resume before making child runnable. Mark cached
4002 registers and status's invalid. If there are "dirty" caches that
4003 need to be written back to the child process, do that.
4005 File descriptors are also cached. As they are a limited resource,
4006 we cannot hold onto them indefinitely. However, as they are
4007 expensive to open, we don't want to throw them away
4008 indescriminately either. As a compromise, we will keep the file
4009 descriptors for the parent process, but discard any file
4010 descriptors we may have accumulated for the threads.
4012 As this function is called by iterate_over_threads, it always
4013 returns zero (so that iterate_over_threads will keep
4017 invalidate_cache (procinfo
*parent
, procinfo
*pi
, void *ptr
)
4019 /* About to run the child; invalidate caches and do any other
4023 if (pi
->gregs_dirty
)
4024 if (parent
== NULL
||
4025 proc_get_current_thread (parent
) != pi
->tid
)
4026 if (!proc_set_gregs (pi
)) /* flush gregs cache */
4027 proc_warn (pi
, "target_resume, set_gregs",
4029 if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0)
4030 if (pi
->fpregs_dirty
)
4031 if (parent
== NULL
||
4032 proc_get_current_thread (parent
) != pi
->tid
)
4033 if (!proc_set_fpregs (pi
)) /* flush fpregs cache */
4034 proc_warn (pi
, "target_resume, set_fpregs",
4040 /* The presence of a parent indicates that this is an LWP.
4041 Close any file descriptors that it might have open.
4042 We don't do this to the master (parent) procinfo. */
4044 close_procinfo_files (pi
);
4046 pi
->gregs_valid
= 0;
4047 pi
->fpregs_valid
= 0;
4049 pi
->gregs_dirty
= 0;
4050 pi
->fpregs_dirty
= 0;
4052 pi
->status_valid
= 0;
4053 pi
->threads_valid
= 0;
4059 /* A callback function for iterate_over_threads. Find the
4060 asynchronous signal thread, and make it runnable. See if that
4061 helps matters any. */
4064 make_signal_thread_runnable (procinfo
*process
, procinfo
*pi
, void *ptr
)
4067 if (proc_flags (pi
) & PR_ASLWP
)
4069 if (!proc_run_process (pi
, 0, -1))
4070 proc_error (pi
, "make_signal_thread_runnable", __LINE__
);
4078 /* Make the child process runnable. Normally we will then call
4079 procfs_wait and wait for it to stop again (unless gdb is async).
4081 If STEP is true, then arrange for the child to stop again after
4082 executing a single instruction. If SIGNO is zero, then cancel any
4083 pending signal; if non-zero, then arrange for the indicated signal
4084 to be delivered to the child when it runs. If PID is -1, then
4085 allow any child thread to run; if non-zero, then allow only the
4086 indicated thread to run. (not implemented yet). */
4089 procfs_resume (struct target_ops
*ops
,
4090 ptid_t ptid
, int step
, enum gdb_signal signo
)
4092 procinfo
*pi
, *thread
;
4096 prrun.prflags |= PRSVADDR;
4097 prrun.pr_vaddr = $PC; set resume address
4098 prrun.prflags |= PRSTRACE; trace signals in pr_trace (all)
4099 prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE)
4100 prrun.prflags |= PRCFAULT; clear current fault.
4102 PRSTRACE and PRSFAULT can be done by other means
4103 (proc_trace_signals, proc_trace_faults)
4104 PRSVADDR is unnecessary.
4105 PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault)
4106 This basically leaves PRSTEP and PRCSIG.
4107 PRCSIG is like PIOCSSIG (proc_clear_current_signal).
4108 So basically PR_STEP is the sole argument that must be passed
4109 to proc_run_process (for use in the prrun struct by ioctl). */
4111 /* Find procinfo for main process. */
4112 pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
4114 /* First cut: ignore pid argument. */
4117 /* Convert signal to host numbering. */
4119 (signo
== GDB_SIGNAL_STOP
&& pi
->ignore_next_sigstop
))
4122 native_signo
= gdb_signal_to_host (signo
);
4124 pi
->ignore_next_sigstop
= 0;
4126 /* Running the process voids all cached registers and status. */
4127 /* Void the threads' caches first. */
4128 proc_iterate_over_threads (pi
, invalidate_cache
, NULL
);
4129 /* Void the process procinfo's caches. */
4130 invalidate_cache (NULL
, pi
, NULL
);
4132 if (ptid_get_pid (ptid
) != -1)
4134 /* Resume a specific thread, presumably suppressing the
4136 thread
= find_procinfo (ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
4139 if (thread
->tid
!= 0)
4141 /* We're to resume a specific thread, and not the
4142 others. Set the child process's PR_ASYNC flag. */
4144 if (!proc_set_async (pi
))
4145 proc_error (pi
, "target_resume, set_async", __LINE__
);
4148 proc_iterate_over_threads (pi
,
4149 make_signal_thread_runnable
,
4152 pi
= thread
; /* Substitute the thread's procinfo
4158 if (!proc_run_process (pi
, step
, native_signo
))
4161 warning (_("resume: target already running. "
4162 "Pretend to resume, and hope for the best!"));
4164 proc_error (pi
, "target_resume", __LINE__
);
4168 /* Set up to trace signals in the child process. */
4171 procfs_pass_signals (struct target_ops
*self
,
4172 int numsigs
, unsigned char *pass_signals
)
4174 gdb_sigset_t signals
;
4175 procinfo
*pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
4178 prfillset (&signals
);
4180 for (signo
= 0; signo
< NSIG
; signo
++)
4182 int target_signo
= gdb_signal_from_host (signo
);
4183 if (target_signo
< numsigs
&& pass_signals
[target_signo
])
4184 gdb_prdelset (&signals
, signo
);
4187 if (!proc_set_traced_signals (pi
, &signals
))
4188 proc_error (pi
, "pass_signals", __LINE__
);
4191 /* Print status information about the child process. */
4194 procfs_files_info (struct target_ops
*ignore
)
4196 struct inferior
*inf
= current_inferior ();
4198 printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"),
4199 inf
->attach_flag
? "attached": "child",
4200 target_pid_to_str (inferior_ptid
));
4203 /* Stop the child process asynchronously, as when the gdb user types
4204 control-c or presses a "stop" button. Works by sending
4205 kill(SIGINT) to the child's process group. */
4208 procfs_interrupt (struct target_ops
*self
, ptid_t ptid
)
4210 kill (-inferior_process_group (), SIGINT
);
4213 /* Make it die. Wait for it to die. Clean up after it. Note: this
4214 should only be applied to the real process, not to an LWP, because
4215 of the check for parent-process. If we need this to work for an
4216 LWP, it needs some more logic. */
4219 unconditionally_kill_inferior (procinfo
*pi
)
4223 parent_pid
= proc_parent_pid (pi
);
4224 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
4225 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
4226 to kill the inferior, otherwise it might remain stopped with a
4228 We do not check the result of the PIOCSSIG, the inferior might have
4231 gdb_siginfo_t newsiginfo
;
4233 memset ((char *) &newsiginfo
, 0, sizeof (newsiginfo
));
4234 newsiginfo
.si_signo
= SIGKILL
;
4235 newsiginfo
.si_code
= 0;
4236 newsiginfo
.si_errno
= 0;
4237 newsiginfo
.si_pid
= getpid ();
4238 newsiginfo
.si_uid
= getuid ();
4239 /* FIXME: use proc_set_current_signal. */
4240 ioctl (pi
->ctl_fd
, PIOCSSIG
, &newsiginfo
);
4242 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4243 if (!proc_kill (pi
, SIGKILL
))
4244 proc_error (pi
, "unconditionally_kill, proc_kill", __LINE__
);
4245 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4246 destroy_procinfo (pi
);
4248 /* If pi is GDB's child, wait for it to die. */
4249 if (parent_pid
== getpid ())
4250 /* FIXME: should we use waitpid to make sure we get the right event?
4251 Should we check the returned event? */
4256 ret
= waitpid (pi
->pid
, &status
, 0);
4263 /* We're done debugging it, and we want it to go away. Then we want
4264 GDB to forget all about it. */
4267 procfs_kill_inferior (struct target_ops
*ops
)
4269 if (!ptid_equal (inferior_ptid
, null_ptid
)) /* ? */
4271 /* Find procinfo for main process. */
4272 procinfo
*pi
= find_procinfo (ptid_get_pid (inferior_ptid
), 0);
4275 unconditionally_kill_inferior (pi
);
4276 target_mourn_inferior ();
4280 /* Forget we ever debugged this thing! */
4283 procfs_mourn_inferior (struct target_ops
*ops
)
4287 if (!ptid_equal (inferior_ptid
, null_ptid
))
4289 /* Find procinfo for main process. */
4290 pi
= find_procinfo (ptid_get_pid (inferior_ptid
), 0);
4292 destroy_procinfo (pi
);
4295 generic_mourn_inferior ();
4297 inf_child_maybe_unpush_target (ops
);
4300 /* When GDB forks to create a runnable inferior process, this function
4301 is called on the parent side of the fork. It's job is to do
4302 whatever is necessary to make the child ready to be debugged, and
4303 then wait for the child to synchronize. */
4306 procfs_init_inferior (struct target_ops
*ops
, int pid
)
4309 gdb_sigset_t signals
;
4313 /* This routine called on the parent side (GDB side)
4314 after GDB forks the inferior. */
4315 if (!target_is_pushed (ops
))
4318 if ((pi
= create_procinfo (pid
, 0)) == NULL
)
4319 perror (_("procfs: out of memory in 'init_inferior'"));
4321 if (!open_procinfo_files (pi
, FD_CTL
))
4322 proc_error (pi
, "init_inferior, open_proc_files", __LINE__
);
4326 open_procinfo_files // done
4329 procfs_notice_signals
4336 /* If not stopped yet, wait for it to stop. */
4337 if (!(proc_flags (pi
) & PR_STOPPED
) &&
4338 !(proc_wait_for_stop (pi
)))
4339 dead_procinfo (pi
, "init_inferior: wait_for_stop failed", KILL
);
4341 /* Save some of the /proc state to be restored if we detach. */
4342 /* FIXME: Why? In case another debugger was debugging it?
4343 We're it's parent, for Ghu's sake! */
4344 if (!proc_get_traced_signals (pi
, &pi
->saved_sigset
))
4345 proc_error (pi
, "init_inferior, get_traced_signals", __LINE__
);
4346 if (!proc_get_held_signals (pi
, &pi
->saved_sighold
))
4347 proc_error (pi
, "init_inferior, get_held_signals", __LINE__
);
4348 if (!proc_get_traced_faults (pi
, &pi
->saved_fltset
))
4349 proc_error (pi
, "init_inferior, get_traced_faults", __LINE__
);
4350 if (!proc_get_traced_sysentry (pi
, pi
->saved_entryset
))
4351 proc_error (pi
, "init_inferior, get_traced_sysentry", __LINE__
);
4352 if (!proc_get_traced_sysexit (pi
, pi
->saved_exitset
))
4353 proc_error (pi
, "init_inferior, get_traced_sysexit", __LINE__
);
4355 if ((fail
= procfs_debug_inferior (pi
)) != 0)
4356 proc_error (pi
, "init_inferior (procfs_debug_inferior)", fail
);
4358 /* FIXME: logically, we should really be turning OFF run-on-last-close,
4359 and possibly even turning ON kill-on-last-close at this point. But
4360 I can't make that change without careful testing which I don't have
4361 time to do right now... */
4362 /* Turn on run-on-last-close flag so that the child
4363 will die if GDB goes away for some reason. */
4364 if (!proc_set_run_on_last_close (pi
))
4365 proc_error (pi
, "init_inferior, set_RLC", __LINE__
);
4367 /* We now have have access to the lwpid of the main thread/lwp. */
4368 lwpid
= proc_get_current_thread (pi
);
4370 /* Create a procinfo for the main lwp. */
4371 create_procinfo (pid
, lwpid
);
4373 /* We already have a main thread registered in the thread table at
4374 this point, but it didn't have any lwp info yet. Notify the core
4375 about it. This changes inferior_ptid as well. */
4376 thread_change_ptid (pid_to_ptid (pid
),
4377 ptid_build (pid
, lwpid
, 0));
4379 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
4382 /* On mips-irix, we need to stop the inferior early enough during
4383 the startup phase in order to be able to load the shared library
4384 symbols and insert the breakpoints that are located in these shared
4385 libraries. Stopping at the program entry point is not good enough
4386 because the -init code is executed before the execution reaches
4389 So what we need to do is to insert a breakpoint in the runtime
4390 loader (rld), more precisely in __dbx_link(). This procedure is
4391 called by rld once all shared libraries have been mapped, but before
4392 the -init code is executed. Unfortuantely, this is not straightforward,
4393 as rld is not part of the executable we are running, and thus we need
4394 the inferior to run until rld itself has been mapped in memory.
4396 For this, we trace all syssgi() syscall exit events. Each time
4397 we detect such an event, we iterate over each text memory maps,
4398 get its associated fd, and scan the symbol table for __dbx_link().
4399 When found, we know that rld has been mapped, and that we can insert
4400 the breakpoint at the symbol address. Once the dbx_link() breakpoint
4401 has been inserted, the syssgi() notifications are no longer necessary,
4402 so they should be canceled. */
4403 proc_trace_syscalls_1 (pi
, SYS_syssgi
, PR_SYSEXIT
, FLAG_SET
, 0);
4407 /* When GDB forks to create a new process, this function is called on
4408 the child side of the fork before GDB exec's the user program. Its
4409 job is to make the child minimally debuggable, so that the parent
4410 GDB process can connect to the child and take over. This function
4411 should do only the minimum to make that possible, and to
4412 synchronize with the parent process. The parent process should
4413 take care of the details. */
4416 procfs_set_exec_trap (void)
4418 /* This routine called on the child side (inferior side)
4419 after GDB forks the inferior. It must use only local variables,
4420 because it may be sharing data space with its parent. */
4425 if ((pi
= create_procinfo (getpid (), 0)) == NULL
)
4426 perror_with_name (_("procfs: create_procinfo failed in child."));
4428 if (open_procinfo_files (pi
, FD_CTL
) == 0)
4430 proc_warn (pi
, "set_exec_trap, open_proc_files", __LINE__
);
4431 gdb_flush (gdb_stderr
);
4432 /* No need to call "dead_procinfo", because we're going to
4437 #ifdef PRFS_STOPEXEC /* defined on OSF */
4438 /* OSF method for tracing exec syscalls. Quoting:
4439 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
4440 exits from exec system calls because of the user level loader. */
4441 /* FIXME: make nice and maybe move into an access function. */
4445 if (ioctl (pi
->ctl_fd
, PIOCGSPCACT
, &prfs_flags
) < 0)
4447 proc_warn (pi
, "set_exec_trap (PIOCGSPCACT)", __LINE__
);
4448 gdb_flush (gdb_stderr
);
4451 prfs_flags
|= PRFS_STOPEXEC
;
4453 if (ioctl (pi
->ctl_fd
, PIOCSSPCACT
, &prfs_flags
) < 0)
4455 proc_warn (pi
, "set_exec_trap (PIOCSSPCACT)", __LINE__
);
4456 gdb_flush (gdb_stderr
);
4460 #else /* not PRFS_STOPEXEC */
4461 /* Everyone else's (except OSF) method for tracing exec syscalls. */
4463 Not all systems with /proc have all the exec* syscalls with the same
4464 names. On the SGI, for example, there is no SYS_exec, but there
4465 *is* a SYS_execv. So, we try to account for that. */
4467 exitset
= sysset_t_alloc (pi
);
4468 gdb_premptysysset (exitset
);
4470 gdb_praddsysset (exitset
, SYS_exec
);
4473 gdb_praddsysset (exitset
, SYS_execve
);
4476 gdb_praddsysset (exitset
, SYS_execv
);
4478 #ifdef DYNAMIC_SYSCALLS
4480 int callnum
= find_syscall (pi
, "execve");
4483 gdb_praddsysset (exitset
, callnum
);
4485 callnum
= find_syscall (pi
, "ra_execve");
4487 gdb_praddsysset (exitset
, callnum
);
4489 #endif /* DYNAMIC_SYSCALLS */
4491 if (!proc_set_traced_sysexit (pi
, exitset
))
4493 proc_warn (pi
, "set_exec_trap, set_traced_sysexit", __LINE__
);
4494 gdb_flush (gdb_stderr
);
4497 #endif /* PRFS_STOPEXEC */
4499 /* FIXME: should this be done in the parent instead? */
4500 /* Turn off inherit on fork flag so that all grand-children
4501 of gdb start with tracing flags cleared. */
4502 if (!proc_unset_inherit_on_fork (pi
))
4503 proc_warn (pi
, "set_exec_trap, unset_inherit", __LINE__
);
4505 /* Turn off run on last close flag, so that the child process
4506 cannot run away just because we close our handle on it.
4507 We want it to wait for the parent to attach. */
4508 if (!proc_unset_run_on_last_close (pi
))
4509 proc_warn (pi
, "set_exec_trap, unset_RLC", __LINE__
);
4511 /* FIXME: No need to destroy the procinfo --
4512 we have our own address space, and we're about to do an exec! */
4513 /*destroy_procinfo (pi);*/
4516 /* This function is called BEFORE gdb forks the inferior process. Its
4517 only real responsibility is to set things up for the fork, and tell
4518 GDB which two functions to call after the fork (one for the parent,
4519 and one for the child).
4521 This function does a complicated search for a unix shell program,
4522 which it then uses to parse arguments and environment variables to
4523 be sent to the child. I wonder whether this code could not be
4524 abstracted out and shared with other unix targets such as
4528 procfs_create_inferior (struct target_ops
*ops
, char *exec_file
,
4529 char *allargs
, char **env
, int from_tty
)
4531 char *shell_file
= getenv ("SHELL");
4535 if (shell_file
!= NULL
&& strchr (shell_file
, '/') == NULL
)
4538 /* We will be looking down the PATH to find shell_file. If we
4539 just do this the normal way (via execlp, which operates by
4540 attempting an exec for each element of the PATH until it
4541 finds one which succeeds), then there will be an exec for
4542 each failed attempt, each of which will cause a PR_SYSEXIT
4543 stop, and we won't know how to distinguish the PR_SYSEXIT's
4544 for these failed execs with the ones for successful execs
4545 (whether the exec has succeeded is stored at that time in the
4546 carry bit or some such architecture-specific and
4547 non-ABI-specified place).
4549 So I can't think of anything better than to search the PATH
4550 now. This has several disadvantages: (1) There is a race
4551 condition; if we find a file now and it is deleted before we
4552 exec it, we lose, even if the deletion leaves a valid file
4553 further down in the PATH, (2) there is no way to know exactly
4554 what an executable (in the sense of "capable of being
4555 exec'd") file is. Using access() loses because it may lose
4556 if the caller is the superuser; failing to use it loses if
4557 there are ACLs or some such. */
4561 /* FIXME-maybe: might want "set path" command so user can change what
4562 path is used from within GDB. */
4563 char *path
= getenv ("PATH");
4565 struct stat statbuf
;
4568 path
= "/bin:/usr/bin";
4570 tryname
= alloca (strlen (path
) + strlen (shell_file
) + 2);
4571 for (p
= path
; p
!= NULL
; p
= p1
? p1
+ 1: NULL
)
4573 p1
= strchr (p
, ':');
4578 strncpy (tryname
, p
, len
);
4579 tryname
[len
] = '\0';
4580 strcat (tryname
, "/");
4581 strcat (tryname
, shell_file
);
4582 if (access (tryname
, X_OK
) < 0)
4584 if (stat (tryname
, &statbuf
) < 0)
4586 if (!S_ISREG (statbuf
.st_mode
))
4587 /* We certainly need to reject directories. I'm not quite
4588 as sure about FIFOs, sockets, etc., but I kind of doubt
4589 that people want to exec() these things. */
4594 /* Not found. This must be an error rather than merely passing
4595 the file to execlp(), because execlp() would try all the
4596 exec()s, causing GDB to get confused. */
4597 error (_("procfs:%d -- Can't find shell %s in PATH"),
4598 __LINE__
, shell_file
);
4600 shell_file
= tryname
;
4603 pid
= fork_inferior (exec_file
, allargs
, env
, procfs_set_exec_trap
,
4604 NULL
, NULL
, shell_file
, NULL
);
4606 procfs_init_inferior (ops
, pid
);
4609 /* An observer for the "inferior_created" event. */
4612 procfs_inferior_created (struct target_ops
*ops
, int from_tty
)
4615 /* Make sure to cancel the syssgi() syscall-exit notifications.
4616 They should normally have been removed by now, but they may still
4617 be activated if the inferior doesn't use shared libraries, or if
4618 we didn't locate __dbx_link, or if we never stopped in __dbx_link.
4619 See procfs_init_inferior() for more details.
4621 Since these notifications are only ever enabled when we spawned
4622 the inferior ourselves, there is nothing to do when the inferior
4623 was created by attaching to an already running process, or when
4624 debugging a core file. */
4625 if (current_inferior ()->attach_flag
|| !target_can_run (¤t_target
))
4628 proc_trace_syscalls_1 (find_procinfo_or_die (ptid_get_pid (inferior_ptid
),
4629 0), SYS_syssgi
, PR_SYSEXIT
, FLAG_RESET
, 0);
4633 /* Callback for update_thread_list. Calls "add_thread". */
4636 procfs_notice_thread (procinfo
*pi
, procinfo
*thread
, void *ptr
)
4638 ptid_t gdb_threadid
= ptid_build (pi
->pid
, thread
->tid
, 0);
4640 if (!in_thread_list (gdb_threadid
) || is_exited (gdb_threadid
))
4641 add_thread (gdb_threadid
);
4646 /* Query all the threads that the target knows about, and give them
4647 back to GDB to add to its list. */
4650 procfs_update_thread_list (struct target_ops
*ops
)
4656 /* Find procinfo for main process. */
4657 pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
4658 proc_update_threads (pi
);
4659 proc_iterate_over_threads (pi
, procfs_notice_thread
, NULL
);
4662 /* Return true if the thread is still 'alive'. This guy doesn't
4663 really seem to be doing his job. Got to investigate how to tell
4664 when a thread is really gone. */
4667 procfs_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
4672 proc
= ptid_get_pid (ptid
);
4673 thread
= ptid_get_lwp (ptid
);
4674 /* If I don't know it, it ain't alive! */
4675 if ((pi
= find_procinfo (proc
, thread
)) == NULL
)
4678 /* If I can't get its status, it ain't alive!
4679 What's more, I need to forget about it! */
4680 if (!proc_get_status (pi
))
4682 destroy_procinfo (pi
);
4685 /* I couldn't have got its status if it weren't alive, so it's
4690 /* Convert PTID to a string. Returns the string in a static
4694 procfs_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
4696 static char buf
[80];
4698 if (ptid_get_lwp (ptid
) == 0)
4699 sprintf (buf
, "process %d", ptid_get_pid (ptid
));
4701 sprintf (buf
, "LWP %ld", ptid_get_lwp (ptid
));
4706 /* Insert a watchpoint. */
4709 procfs_set_watchpoint (ptid_t ptid
, CORE_ADDR addr
, int len
, int rwflag
,
4716 pi
= find_procinfo_or_die (ptid_get_pid (ptid
) == -1 ?
4717 ptid_get_pid (inferior_ptid
) : ptid_get_pid (ptid
),
4720 /* Translate from GDB's flags to /proc's. */
4721 if (len
> 0) /* len == 0 means delete watchpoint. */
4723 switch (rwflag
) { /* FIXME: need an enum! */
4724 case hw_write
: /* default watchpoint (write) */
4725 pflags
= WRITE_WATCHFLAG
;
4727 case hw_read
: /* read watchpoint */
4728 pflags
= READ_WATCHFLAG
;
4730 case hw_access
: /* access watchpoint */
4731 pflags
= READ_WATCHFLAG
| WRITE_WATCHFLAG
;
4733 case hw_execute
: /* execution HW breakpoint */
4734 pflags
= EXEC_WATCHFLAG
;
4736 default: /* Something weird. Return error. */
4739 if (after
) /* Stop after r/w access is completed. */
4740 pflags
|= AFTER_WATCHFLAG
;
4743 if (!proc_set_watchpoint (pi
, addr
, len
, pflags
))
4745 if (errno
== E2BIG
) /* Typical error for no resources. */
4746 return -1; /* fail */
4747 /* GDB may try to remove the same watchpoint twice.
4748 If a remove request returns no match, don't error. */
4749 if (errno
== ESRCH
&& len
== 0)
4750 return 0; /* ignore */
4751 proc_error (pi
, "set_watchpoint", __LINE__
);
4757 /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE
4758 is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint,
4759 or bp_hardware_watchpoint. CNT is the number of watchpoints used so
4762 Note: procfs_can_use_hw_breakpoint() is not yet used by all
4763 procfs.c targets due to the fact that some of them still define
4764 target_can_use_hardware_watchpoint. */
4767 procfs_can_use_hw_breakpoint (struct target_ops
*self
,
4769 int cnt
, int othertype
)
4771 /* Due to the way that proc_set_watchpoint() is implemented, host
4772 and target pointers must be of the same size. If they are not,
4773 we can't use hardware watchpoints. This limitation is due to the
4774 fact that proc_set_watchpoint() calls
4775 procfs_address_to_host_pointer(); a close inspection of
4776 procfs_address_to_host_pointer will reveal that an internal error
4777 will be generated when the host and target pointer sizes are
4779 struct type
*ptr_type
= builtin_type (target_gdbarch ())->builtin_data_ptr
;
4781 if (sizeof (void *) != TYPE_LENGTH (ptr_type
))
4784 /* Other tests here??? */
4789 /* Returns non-zero if process is stopped on a hardware watchpoint
4790 fault, else returns zero. */
4793 procfs_stopped_by_watchpoint (struct target_ops
*ops
)
4797 pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
4799 if (proc_flags (pi
) & (PR_STOPPED
| PR_ISTOP
))
4801 if (proc_why (pi
) == PR_FAULTED
)
4804 if (proc_what (pi
) == FLTWATCH
)
4808 if (proc_what (pi
) == FLTKWATCH
)
4816 /* Returns 1 if the OS knows the position of the triggered watchpoint,
4817 and sets *ADDR to that address. Returns 0 if OS cannot report that
4818 address. This function is only called if
4819 procfs_stopped_by_watchpoint returned 1, thus no further checks are
4820 done. The function also assumes that ADDR is not NULL. */
4823 procfs_stopped_data_address (struct target_ops
*targ
, CORE_ADDR
*addr
)
4827 pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
4828 return proc_watchpoint_address (pi
, addr
);
4832 procfs_insert_watchpoint (struct target_ops
*self
,
4833 CORE_ADDR addr
, int len
,
4834 enum target_hw_bp_type type
,
4835 struct expression
*cond
)
4837 if (!target_have_steppable_watchpoint
4838 && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ()))
4840 /* When a hardware watchpoint fires off the PC will be left at
4841 the instruction following the one which caused the
4842 watchpoint. It will *NOT* be necessary for GDB to step over
4844 return procfs_set_watchpoint (inferior_ptid
, addr
, len
, type
, 1);
4848 /* When a hardware watchpoint fires off the PC will be left at
4849 the instruction which caused the watchpoint. It will be
4850 necessary for GDB to step over the watchpoint. */
4851 return procfs_set_watchpoint (inferior_ptid
, addr
, len
, type
, 0);
4856 procfs_remove_watchpoint (struct target_ops
*self
,
4857 CORE_ADDR addr
, int len
,
4858 enum target_hw_bp_type type
,
4859 struct expression
*cond
)
4861 return procfs_set_watchpoint (inferior_ptid
, addr
, 0, 0, 0);
4865 procfs_region_ok_for_hw_watchpoint (struct target_ops
*self
,
4866 CORE_ADDR addr
, int len
)
4868 /* The man page for proc(4) on Solaris 2.6 and up says that the
4869 system can support "thousands" of hardware watchpoints, but gives
4870 no method for finding out how many; It doesn't say anything about
4871 the allowed size for the watched area either. So we just tell
4877 procfs_use_watchpoints (struct target_ops
*t
)
4879 t
->to_stopped_by_watchpoint
= procfs_stopped_by_watchpoint
;
4880 t
->to_insert_watchpoint
= procfs_insert_watchpoint
;
4881 t
->to_remove_watchpoint
= procfs_remove_watchpoint
;
4882 t
->to_region_ok_for_hw_watchpoint
= procfs_region_ok_for_hw_watchpoint
;
4883 t
->to_can_use_hw_breakpoint
= procfs_can_use_hw_breakpoint
;
4884 t
->to_stopped_data_address
= procfs_stopped_data_address
;
4887 /* Memory Mappings Functions: */
4889 /* Call a callback function once for each mapping, passing it the
4890 mapping, an optional secondary callback function, and some optional
4891 opaque data. Quit and return the first non-zero value returned
4894 PI is the procinfo struct for the process to be mapped. FUNC is
4895 the callback function to be called by this iterator. DATA is the
4896 optional opaque data to be passed to the callback function.
4897 CHILD_FUNC is the optional secondary function pointer to be passed
4898 to the child function. Returns the first non-zero return value
4899 from the callback function, or zero. */
4902 iterate_over_mappings (procinfo
*pi
, find_memory_region_ftype child_func
,
4904 int (*func
) (struct prmap
*map
,
4905 find_memory_region_ftype child_func
,
4908 char pathname
[MAX_PROC_NAME_SIZE
];
4909 struct prmap
*prmaps
;
4910 struct prmap
*prmap
;
4914 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
4919 /* Get the number of mappings, allocate space,
4920 and read the mappings into prmaps. */
4923 sprintf (pathname
, "/proc/%d/map", pi
->pid
);
4924 if ((map_fd
= open (pathname
, O_RDONLY
)) < 0)
4925 proc_error (pi
, "iterate_over_mappings (open)", __LINE__
);
4927 /* Make sure it gets closed again. */
4928 make_cleanup_close (map_fd
);
4930 /* Use stat to determine the file size, and compute
4931 the number of prmap_t objects it contains. */
4932 if (fstat (map_fd
, &sbuf
) != 0)
4933 proc_error (pi
, "iterate_over_mappings (fstat)", __LINE__
);
4935 nmap
= sbuf
.st_size
/ sizeof (prmap_t
);
4936 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4937 if (read (map_fd
, (char *) prmaps
, nmap
* sizeof (*prmaps
))
4938 != (nmap
* sizeof (*prmaps
)))
4939 proc_error (pi
, "iterate_over_mappings (read)", __LINE__
);
4941 /* Use ioctl command PIOCNMAP to get number of mappings. */
4942 if (ioctl (pi
->ctl_fd
, PIOCNMAP
, &nmap
) != 0)
4943 proc_error (pi
, "iterate_over_mappings (PIOCNMAP)", __LINE__
);
4945 prmaps
= (struct prmap
*) alloca ((nmap
+ 1) * sizeof (*prmaps
));
4946 if (ioctl (pi
->ctl_fd
, PIOCMAP
, prmaps
) != 0)
4947 proc_error (pi
, "iterate_over_mappings (PIOCMAP)", __LINE__
);
4950 for (prmap
= prmaps
; nmap
> 0; prmap
++, nmap
--)
4951 if ((funcstat
= (*func
) (prmap
, child_func
, data
)) != 0)
4953 do_cleanups (cleanups
);
4957 do_cleanups (cleanups
);
4961 /* Implements the to_find_memory_regions method. Calls an external
4962 function for each memory region.
4963 Returns the integer value returned by the callback. */
4966 find_memory_regions_callback (struct prmap
*map
,
4967 find_memory_region_ftype func
, void *data
)
4969 return (*func
) ((CORE_ADDR
) map
->pr_vaddr
,
4971 (map
->pr_mflags
& MA_READ
) != 0,
4972 (map
->pr_mflags
& MA_WRITE
) != 0,
4973 (map
->pr_mflags
& MA_EXEC
) != 0,
4974 1, /* MODIFIED is unknown, pass it as true. */
4978 /* External interface. Calls a callback function once for each
4979 mapped memory region in the child process, passing as arguments:
4981 CORE_ADDR virtual_address,
4983 int read, TRUE if region is readable by the child
4984 int write, TRUE if region is writable by the child
4985 int execute TRUE if region is executable by the child.
4987 Stops iterating and returns the first non-zero value returned by
4991 proc_find_memory_regions (struct target_ops
*self
,
4992 find_memory_region_ftype func
, void *data
)
4994 procinfo
*pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
4996 return iterate_over_mappings (pi
, func
, data
,
4997 find_memory_regions_callback
);
5000 /* Returns an ascii representation of a memory mapping's flags. */
5003 mappingflags (long flags
)
5005 static char asciiflags
[8];
5007 strcpy (asciiflags
, "-------");
5008 #if defined (MA_PHYS)
5009 if (flags
& MA_PHYS
)
5010 asciiflags
[0] = 'd';
5012 if (flags
& MA_STACK
)
5013 asciiflags
[1] = 's';
5014 if (flags
& MA_BREAK
)
5015 asciiflags
[2] = 'b';
5016 if (flags
& MA_SHARED
)
5017 asciiflags
[3] = 's';
5018 if (flags
& MA_READ
)
5019 asciiflags
[4] = 'r';
5020 if (flags
& MA_WRITE
)
5021 asciiflags
[5] = 'w';
5022 if (flags
& MA_EXEC
)
5023 asciiflags
[6] = 'x';
5024 return (asciiflags
);
5027 /* Callback function, does the actual work for 'info proc
5031 info_mappings_callback (struct prmap
*map
, find_memory_region_ftype ignore
,
5034 unsigned int pr_off
;
5036 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
5037 pr_off
= (unsigned int) map
->pr_offset
;
5039 pr_off
= map
->pr_off
;
5042 if (gdbarch_addr_bit (target_gdbarch ()) == 32)
5043 printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n",
5044 (unsigned long) map
->pr_vaddr
,
5045 (unsigned long) map
->pr_vaddr
+ map
->pr_size
- 1,
5046 (unsigned long) map
->pr_size
,
5048 mappingflags (map
->pr_mflags
));
5050 printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n",
5051 (unsigned long) map
->pr_vaddr
,
5052 (unsigned long) map
->pr_vaddr
+ map
->pr_size
- 1,
5053 (unsigned long) map
->pr_size
,
5055 mappingflags (map
->pr_mflags
));
5060 /* Implement the "info proc mappings" subcommand. */
5063 info_proc_mappings (procinfo
*pi
, int summary
)
5066 return; /* No output for summary mode. */
5068 printf_filtered (_("Mapped address spaces:\n\n"));
5069 if (gdbarch_ptr_bit (target_gdbarch ()) == 32)
5070 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
5077 printf_filtered (" %18s %18s %10s %10s %7s\n",
5084 iterate_over_mappings (pi
, NULL
, NULL
, info_mappings_callback
);
5085 printf_filtered ("\n");
5088 /* Implement the "info proc" command. */
5091 procfs_info_proc (struct target_ops
*ops
, const char *args
,
5092 enum info_proc_what what
)
5094 struct cleanup
*old_chain
;
5095 procinfo
*process
= NULL
;
5096 procinfo
*thread
= NULL
;
5114 error (_("Not supported on this target."));
5117 old_chain
= make_cleanup (null_cleanup
, 0);
5120 argv
= gdb_buildargv (args
);
5121 make_cleanup_freeargv (argv
);
5123 while (argv
!= NULL
&& *argv
!= NULL
)
5125 if (isdigit (argv
[0][0]))
5127 pid
= strtoul (argv
[0], &tmp
, 10);
5129 tid
= strtoul (++tmp
, NULL
, 10);
5131 else if (argv
[0][0] == '/')
5133 tid
= strtoul (argv
[0] + 1, NULL
, 10);
5138 pid
= ptid_get_pid (inferior_ptid
);
5140 error (_("No current process: you must name one."));
5143 /* Have pid, will travel.
5144 First see if it's a process we're already debugging. */
5145 process
= find_procinfo (pid
, 0);
5146 if (process
== NULL
)
5148 /* No. So open a procinfo for it, but
5149 remember to close it again when finished. */
5150 process
= create_procinfo (pid
, 0);
5151 make_cleanup (do_destroy_procinfo_cleanup
, process
);
5152 if (!open_procinfo_files (process
, FD_CTL
))
5153 proc_error (process
, "info proc, open_procinfo_files", __LINE__
);
5157 thread
= create_procinfo (pid
, tid
);
5161 printf_filtered (_("process %d flags:\n"), process
->pid
);
5162 proc_prettyprint_flags (proc_flags (process
), 1);
5163 if (proc_flags (process
) & (PR_STOPPED
| PR_ISTOP
))
5164 proc_prettyprint_why (proc_why (process
), proc_what (process
), 1);
5165 if (proc_get_nthreads (process
) > 1)
5166 printf_filtered ("Process has %d threads.\n",
5167 proc_get_nthreads (process
));
5171 printf_filtered (_("thread %d flags:\n"), thread
->tid
);
5172 proc_prettyprint_flags (proc_flags (thread
), 1);
5173 if (proc_flags (thread
) & (PR_STOPPED
| PR_ISTOP
))
5174 proc_prettyprint_why (proc_why (thread
), proc_what (thread
), 1);
5179 info_proc_mappings (process
, 0);
5182 do_cleanups (old_chain
);
5185 /* Modify the status of the system call identified by SYSCALLNUM in
5186 the set of syscalls that are currently traced/debugged.
5188 If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set
5189 will be updated. Otherwise, the exit syscalls set will be updated.
5191 If MODE is FLAG_SET, then traces will be enabled. Otherwise, they
5192 will be disabled. */
5195 proc_trace_syscalls_1 (procinfo
*pi
, int syscallnum
, int entry_or_exit
,
5196 int mode
, int from_tty
)
5200 if (entry_or_exit
== PR_SYSENTRY
)
5201 sysset
= proc_get_traced_sysentry (pi
, NULL
);
5203 sysset
= proc_get_traced_sysexit (pi
, NULL
);
5206 proc_error (pi
, "proc-trace, get_traced_sysset", __LINE__
);
5208 if (mode
== FLAG_SET
)
5209 gdb_praddsysset (sysset
, syscallnum
);
5211 gdb_prdelsysset (sysset
, syscallnum
);
5213 if (entry_or_exit
== PR_SYSENTRY
)
5215 if (!proc_set_traced_sysentry (pi
, sysset
))
5216 proc_error (pi
, "proc-trace, set_traced_sysentry", __LINE__
);
5220 if (!proc_set_traced_sysexit (pi
, sysset
))
5221 proc_error (pi
, "proc-trace, set_traced_sysexit", __LINE__
);
5226 proc_trace_syscalls (char *args
, int from_tty
, int entry_or_exit
, int mode
)
5230 if (ptid_get_pid (inferior_ptid
) <= 0)
5231 error (_("you must be debugging a process to use this command."));
5233 if (args
== NULL
|| args
[0] == 0)
5234 error_no_arg (_("system call to trace"));
5236 pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
5237 if (isdigit (args
[0]))
5239 const int syscallnum
= atoi (args
);
5241 proc_trace_syscalls_1 (pi
, syscallnum
, entry_or_exit
, mode
, from_tty
);
5246 proc_trace_sysentry_cmd (char *args
, int from_tty
)
5248 proc_trace_syscalls (args
, from_tty
, PR_SYSENTRY
, FLAG_SET
);
5252 proc_trace_sysexit_cmd (char *args
, int from_tty
)
5254 proc_trace_syscalls (args
, from_tty
, PR_SYSEXIT
, FLAG_SET
);
5258 proc_untrace_sysentry_cmd (char *args
, int from_tty
)
5260 proc_trace_syscalls (args
, from_tty
, PR_SYSENTRY
, FLAG_RESET
);
5264 proc_untrace_sysexit_cmd (char *args
, int from_tty
)
5266 proc_trace_syscalls (args
, from_tty
, PR_SYSEXIT
, FLAG_RESET
);
5270 /* Provide a prototype to silence -Wmissing-prototypes. */
5271 extern void _initialize_procfs (void);
5274 _initialize_procfs (void)
5276 observer_attach_inferior_created (procfs_inferior_created
);
5278 add_com ("proc-trace-entry", no_class
, proc_trace_sysentry_cmd
,
5279 _("Give a trace of entries into the syscall."));
5280 add_com ("proc-trace-exit", no_class
, proc_trace_sysexit_cmd
,
5281 _("Give a trace of exits from the syscall."));
5282 add_com ("proc-untrace-entry", no_class
, proc_untrace_sysentry_cmd
,
5283 _("Cancel a trace of entries into the syscall."));
5284 add_com ("proc-untrace-exit", no_class
, proc_untrace_sysexit_cmd
,
5285 _("Cancel a trace of exits from the syscall."));
5288 /* =================== END, GDB "MODULE" =================== */
5292 /* miscellaneous stubs: */
5294 /* The following satisfy a few random symbols mostly created by the
5295 solaris threads implementation, which I will chase down later. */
5297 /* Return a pid for which we guarantee we will be able to find a
5301 procfs_first_available (void)
5303 return pid_to_ptid (procinfo_list
? procinfo_list
->pid
: -1);
5306 /* =================== GCORE .NOTE "MODULE" =================== */
5307 #if defined (PIOCOPENLWP) || defined (PCAGENT)
5308 /* gcore only implemented on solaris (so far) */
5311 procfs_do_thread_registers (bfd
*obfd
, ptid_t ptid
,
5312 char *note_data
, int *note_size
,
5313 enum gdb_signal stop_signal
)
5315 struct regcache
*regcache
= get_thread_regcache (ptid
);
5316 gdb_gregset_t gregs
;
5317 gdb_fpregset_t fpregs
;
5318 unsigned long merged_pid
;
5319 struct cleanup
*old_chain
;
5321 merged_pid
= ptid_get_lwp (ptid
) << 16 | ptid_get_pid (ptid
);
5323 /* This part is the old method for fetching registers.
5324 It should be replaced by the newer one using regsets
5325 once it is implemented in this platform:
5326 gdbarch_iterate_over_regset_sections(). */
5328 old_chain
= save_inferior_ptid ();
5329 inferior_ptid
= ptid
;
5330 target_fetch_registers (regcache
, -1);
5332 fill_gregset (regcache
, &gregs
, -1);
5333 #if defined (NEW_PROC_API)
5334 note_data
= (char *) elfcore_write_lwpstatus (obfd
,
5341 note_data
= (char *) elfcore_write_prstatus (obfd
,
5348 fill_fpregset (regcache
, &fpregs
, -1);
5349 note_data
= (char *) elfcore_write_prfpreg (obfd
,
5355 do_cleanups (old_chain
);
5360 struct procfs_corefile_thread_data
{
5364 enum gdb_signal stop_signal
;
5368 procfs_corefile_thread_callback (procinfo
*pi
, procinfo
*thread
, void *data
)
5370 struct procfs_corefile_thread_data
*args
= data
;
5374 ptid_t ptid
= ptid_build (pi
->pid
, thread
->tid
, 0);
5376 args
->note_data
= procfs_do_thread_registers (args
->obfd
, ptid
,
5385 find_signalled_thread (struct thread_info
*info
, void *data
)
5387 if (info
->suspend
.stop_signal
!= GDB_SIGNAL_0
5388 && ptid_get_pid (info
->ptid
) == ptid_get_pid (inferior_ptid
))
5394 static enum gdb_signal
5395 find_stop_signal (void)
5397 struct thread_info
*info
=
5398 iterate_over_threads (find_signalled_thread
, NULL
);
5401 return info
->suspend
.stop_signal
;
5403 return GDB_SIGNAL_0
;
5407 procfs_make_note_section (struct target_ops
*self
, bfd
*obfd
, int *note_size
)
5409 struct cleanup
*old_chain
;
5410 gdb_gregset_t gregs
;
5411 gdb_fpregset_t fpregs
;
5412 char fname
[16] = {'\0'};
5413 char psargs
[80] = {'\0'};
5414 procinfo
*pi
= find_procinfo_or_die (ptid_get_pid (inferior_ptid
), 0);
5415 char *note_data
= NULL
;
5417 struct procfs_corefile_thread_data thread_args
;
5420 enum gdb_signal stop_signal
;
5422 if (get_exec_file (0))
5424 strncpy (fname
, lbasename (get_exec_file (0)), sizeof (fname
));
5425 fname
[sizeof (fname
) - 1] = 0;
5426 strncpy (psargs
, get_exec_file (0), sizeof (psargs
));
5427 psargs
[sizeof (psargs
) - 1] = 0;
5429 inf_args
= get_inferior_args ();
5430 if (inf_args
&& *inf_args
&&
5431 strlen (inf_args
) < ((int) sizeof (psargs
) - (int) strlen (psargs
)))
5433 strncat (psargs
, " ",
5434 sizeof (psargs
) - strlen (psargs
));
5435 strncat (psargs
, inf_args
,
5436 sizeof (psargs
) - strlen (psargs
));
5440 note_data
= (char *) elfcore_write_prpsinfo (obfd
,
5446 stop_signal
= find_stop_signal ();
5449 fill_gregset (get_current_regcache (), &gregs
, -1);
5450 note_data
= elfcore_write_pstatus (obfd
, note_data
, note_size
,
5451 ptid_get_pid (inferior_ptid
),
5452 stop_signal
, &gregs
);
5455 thread_args
.obfd
= obfd
;
5456 thread_args
.note_data
= note_data
;
5457 thread_args
.note_size
= note_size
;
5458 thread_args
.stop_signal
= stop_signal
;
5459 proc_iterate_over_threads (pi
, procfs_corefile_thread_callback
,
5461 note_data
= thread_args
.note_data
;
5463 auxv_len
= target_read_alloc (¤t_target
, TARGET_OBJECT_AUXV
,
5467 note_data
= elfcore_write_note (obfd
, note_data
, note_size
,
5468 "CORE", NT_AUXV
, auxv
, auxv_len
);
5474 #else /* !Solaris */
5476 procfs_make_note_section (struct target_ops
*self
, bfd
*obfd
, int *note_size
)
5478 error (_("gcore not implemented for this host."));
5479 return NULL
; /* lint */
5481 #endif /* Solaris */
5482 /* =================== END GCORE .NOTE "MODULE" =================== */