1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
3 Copyright (C) 1999-2014 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/>. */
27 #include "elf-bfd.h" /* for elfcore_write_* */
29 #include "gdbthread.h"
31 #include "inf-child.h"
33 #if defined (NEW_PROC_API)
34 #define _STRUCTURED_PROC 1 /* Should be done by configure script. */
37 #include <sys/procfs.h>
38 #ifdef HAVE_SYS_FAULT_H
39 #include <sys/fault.h>
41 #ifdef HAVE_SYS_SYSCALL_H
42 #include <sys/syscall.h>
44 #include <sys/errno.h>
50 #include "gdb_assert.h"
56 /* This module provides the interface between GDB and the
57 /proc file system, which is used on many versions of Unix
58 as a means for debuggers to control other processes.
60 Examples of the systems that use this interface are:
67 /proc works by imitating a file system: you open a simulated file
68 that represents the process you wish to interact with, and perform
69 operations on that "file" in order to examine or change the state
72 The most important thing to know about /proc and this module is
73 that there are two very different interfaces to /proc:
75 One that uses the ioctl system call, and another that uses read
76 and write system calls.
78 This module has to support both /proc interfaces. This means that
79 there are two different ways of doing every basic operation.
81 In order to keep most of the code simple and clean, I have defined
82 an interface "layer" which hides all these system calls. An ifdef
83 (NEW_PROC_API) determines which interface we are using, and most or
84 all occurrances of this ifdef should be confined to this interface
87 /* Determine which /proc API we are using: The ioctl API defines
88 PIOCSTATUS, while the read/write (multiple fd) API never does. */
91 #include <sys/types.h>
92 #include <dirent.h> /* opendir/readdir, for listing the LWP's */
95 #include <fcntl.h> /* for O_RDONLY */
96 #include <unistd.h> /* for "X_OK" */
97 #include <sys/stat.h> /* for struct stat */
99 /* Note: procfs-utils.h must be included after the above system header
100 files, because it redefines various system calls using macros.
101 This may be incompatible with the prototype declarations. */
103 #include "proc-utils.h"
105 /* Prototypes for supply_gregset etc. */
108 /* =================== TARGET_OPS "MODULE" =================== */
110 /* This module defines the GDB target vector and its methods. */
112 static void procfs_attach (struct target_ops *, char *, int);
113 static void procfs_detach (struct target_ops *, const char *, int);
114 static void procfs_resume (struct target_ops *,
115 ptid_t, int, enum gdb_signal);
116 static void procfs_stop (ptid_t);
117 static void procfs_files_info (struct target_ops *);
118 static void procfs_fetch_registers (struct target_ops *,
119 struct regcache *, int);
120 static void procfs_store_registers (struct target_ops *,
121 struct regcache *, int);
122 static void procfs_pass_signals (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 int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int,
130 struct mem_attrib *attrib,
131 struct target_ops *);
132 static target_xfer_partial_ftype procfs_xfer_partial;
134 static int procfs_thread_alive (struct target_ops *ops, ptid_t);
136 static void procfs_find_new_threads (struct target_ops *ops);
137 static char *procfs_pid_to_str (struct target_ops *, ptid_t);
139 static int proc_find_memory_regions (find_memory_region_ftype, void *);
141 static char * procfs_make_note_section (bfd *, int *);
143 static int procfs_can_use_hw_breakpoint (struct target_ops *self,
146 static void procfs_info_proc (struct target_ops *, char *,
147 enum info_proc_what);
149 #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64)
150 /* When GDB is built as 64-bit application on Solaris, the auxv data
151 is presented in 64-bit format. We need to provide a custom parser
154 procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
155 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
157 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
158 gdb_byte *ptr = *readptr;
163 if (endptr - ptr < 8 * 2)
166 *typep = extract_unsigned_integer (ptr, 4, byte_order);
168 /* The size of data is always 64-bit. If the application is 32-bit,
169 it will be zero extended, as expected. */
170 *valp = extract_unsigned_integer (ptr, 8, byte_order);
181 struct target_ops *t = inf_child_target ();
183 t->to_shortname = "procfs";
184 t->to_longname = "Unix /proc child process";
186 "Unix /proc child process (started by the \"run\" command).";
187 t->to_create_inferior = procfs_create_inferior;
188 t->to_kill = procfs_kill_inferior;
189 t->to_mourn_inferior = procfs_mourn_inferior;
190 t->to_attach = procfs_attach;
191 t->to_detach = procfs_detach;
192 t->to_wait = procfs_wait;
193 t->to_resume = procfs_resume;
194 t->to_fetch_registers = procfs_fetch_registers;
195 t->to_store_registers = procfs_store_registers;
196 t->to_xfer_partial = procfs_xfer_partial;
197 t->deprecated_xfer_memory = procfs_xfer_memory;
198 t->to_pass_signals = procfs_pass_signals;
199 t->to_files_info = procfs_files_info;
200 t->to_stop = procfs_stop;
202 t->to_find_new_threads = procfs_find_new_threads;
203 t->to_thread_alive = procfs_thread_alive;
204 t->to_pid_to_str = procfs_pid_to_str;
206 t->to_has_thread_control = tc_schedlock;
207 t->to_find_memory_regions = proc_find_memory_regions;
208 t->to_make_corefile_notes = procfs_make_note_section;
209 t->to_info_proc = procfs_info_proc;
211 #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64)
212 t->to_auxv_parse = procfs_auxv_parse;
215 t->to_magic = OPS_MAGIC;
220 /* =================== END, TARGET_OPS "MODULE" =================== */
222 /* World Unification:
224 Put any typedefs, defines etc. here that are required for the
225 unification of code that handles different versions of /proc. */
227 #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */
229 enum { READ_WATCHFLAG = WA_READ,
230 WRITE_WATCHFLAG = WA_WRITE,
231 EXEC_WATCHFLAG = WA_EXEC,
232 AFTER_WATCHFLAG = WA_TRAPAFTER
235 #else /* Irix method for watchpoints */
236 enum { READ_WATCHFLAG = MA_READ,
237 WRITE_WATCHFLAG = MA_WRITE,
238 EXEC_WATCHFLAG = MA_EXEC,
239 AFTER_WATCHFLAG = 0 /* trapafter not implemented */
244 #ifdef HAVE_PR_SIGSET_T
245 typedef pr_sigset_t gdb_sigset_t;
247 typedef sigset_t gdb_sigset_t;
251 #ifdef HAVE_PR_SIGACTION64_T
252 typedef pr_sigaction64_t gdb_sigaction_t;
254 typedef struct sigaction gdb_sigaction_t;
258 #ifdef HAVE_PR_SIGINFO64_T
259 typedef pr_siginfo64_t gdb_siginfo_t;
261 typedef siginfo_t gdb_siginfo_t;
264 /* On mips-irix, praddset and prdelset are defined in such a way that
265 they return a value, which causes GCC to emit a -Wunused error
266 because the returned value is not used. Prevent this warning
267 by casting the return value to void. On sparc-solaris, this issue
268 does not exist because the definition of these macros already include
269 that cast to void. */
270 #define gdb_praddset(sp, flag) ((void) praddset (sp, flag))
271 #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag))
273 /* gdb_premptysysset */
275 #define gdb_premptysysset premptysysset
277 #define gdb_premptysysset premptyset
282 #define gdb_praddsysset praddsysset
284 #define gdb_praddsysset gdb_praddset
289 #define gdb_prdelsysset prdelsysset
291 #define gdb_prdelsysset gdb_prdelset
294 /* prissyssetmember */
295 #ifdef prissyssetmember
296 #define gdb_pr_issyssetmember prissyssetmember
298 #define gdb_pr_issyssetmember prismember
301 /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't
302 as intuitively descriptive as it could be, so we'll define
303 DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of
304 this writing, this feature is only found on AIX5 systems and
305 basically means that the set of syscalls is not fixed. I.e,
306 there's no nice table that one can #include to get all of the
307 syscall numbers. Instead, they're stored in /proc/PID/sysent
308 for each process. We are at least guaranteed that they won't
309 change over the lifetime of the process. But each process could
310 (in theory) have different syscall numbers. */
311 #ifdef HAVE_PRSYSENT_T
312 #define DYNAMIC_SYSCALLS
317 /* =================== STRUCT PROCINFO "MODULE" =================== */
319 /* FIXME: this comment will soon be out of date W.R.T. threads. */
321 /* The procinfo struct is a wrapper to hold all the state information
322 concerning a /proc process. There should be exactly one procinfo
323 for each process, and since GDB currently can debug only one
324 process at a time, that means there should be only one procinfo.
325 All of the LWP's of a process can be accessed indirectly thru the
326 single process procinfo.
328 However, against the day when GDB may debug more than one process,
329 this data structure is kept in a list (which for now will hold no
330 more than one member), and many functions will have a pointer to a
331 procinfo as an argument.
333 There will be a separate procinfo structure for use by the (not yet
334 implemented) "info proc" command, so that we can print useful
335 information about any random process without interfering with the
336 inferior's procinfo information. */
339 /* format strings for /proc paths */
340 # ifndef CTL_PROC_NAME_FMT
341 # define MAIN_PROC_NAME_FMT "/proc/%d"
342 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
343 # define AS_PROC_NAME_FMT "/proc/%d/as"
344 # define MAP_PROC_NAME_FMT "/proc/%d/map"
345 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
346 # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus")
348 /* the name of the proc status struct depends on the implementation */
349 typedef pstatus_t gdb_prstatus_t;
350 typedef lwpstatus_t gdb_lwpstatus_t;
351 #else /* ! NEW_PROC_API */
352 /* format strings for /proc paths */
353 # ifndef CTL_PROC_NAME_FMT
354 # define MAIN_PROC_NAME_FMT "/proc/%05d"
355 # define CTL_PROC_NAME_FMT "/proc/%05d"
356 # define AS_PROC_NAME_FMT "/proc/%05d"
357 # define MAP_PROC_NAME_FMT "/proc/%05d"
358 # define STATUS_PROC_NAME_FMT "/proc/%05d"
359 # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp")
361 /* The name of the proc status struct depends on the implementation. */
362 typedef prstatus_t gdb_prstatus_t;
363 typedef prstatus_t gdb_lwpstatus_t;
364 #endif /* NEW_PROC_API */
366 typedef struct procinfo {
367 struct procinfo *next;
368 int pid; /* Process ID */
369 int tid; /* Thread/LWP id */
373 int ignore_next_sigstop;
375 /* The following four fd fields may be identical, or may contain
376 several different fd's, depending on the version of /proc
377 (old ioctl or new read/write). */
379 int ctl_fd; /* File descriptor for /proc control file */
381 /* The next three file descriptors are actually only needed in the
382 read/write, multiple-file-descriptor implemenation
383 (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the
384 code, we will use them uniformly by (in the case of the ioctl
385 single-file-descriptor implementation) filling them with copies
386 of the control fd. */
387 int status_fd; /* File descriptor for /proc status file */
388 int as_fd; /* File descriptor for /proc as file */
390 char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */
392 fltset_t saved_fltset; /* Saved traced hardware fault set */
393 gdb_sigset_t saved_sigset; /* Saved traced signal set */
394 gdb_sigset_t saved_sighold; /* Saved held signal set */
395 sysset_t *saved_exitset; /* Saved traced system call exit set */
396 sysset_t *saved_entryset; /* Saved traced system call entry set */
398 gdb_prstatus_t prstatus; /* Current process status info */
401 gdb_fpregset_t fpregset; /* Current floating point registers */
404 #ifdef DYNAMIC_SYSCALLS
405 int num_syscalls; /* Total number of syscalls */
406 char **syscall_names; /* Syscall number to name map */
409 struct procinfo *thread_list;
411 int status_valid : 1;
413 int fpregs_valid : 1;
414 int threads_valid: 1;
417 static char errmsg[128]; /* shared error msg buffer */
419 /* Function prototypes for procinfo module: */
421 static procinfo *find_procinfo_or_die (int pid, int tid);
422 static procinfo *find_procinfo (int pid, int tid);
423 static procinfo *create_procinfo (int pid, int tid);
424 static void destroy_procinfo (procinfo * p);
425 static void do_destroy_procinfo_cleanup (void *);
426 static void dead_procinfo (procinfo * p, char *msg, int killp);
427 static int open_procinfo_files (procinfo * p, int which);
428 static void close_procinfo_files (procinfo * p);
429 static int sysset_t_size (procinfo *p);
430 static sysset_t *sysset_t_alloc (procinfo * pi);
431 #ifdef DYNAMIC_SYSCALLS
432 static void load_syscalls (procinfo *pi);
433 static void free_syscalls (procinfo *pi);
434 static int find_syscall (procinfo *pi, char *name);
435 #endif /* DYNAMIC_SYSCALLS */
437 static int iterate_over_mappings
438 (procinfo *pi, find_memory_region_ftype child_func, void *data,
439 int (*func) (struct prmap *map, find_memory_region_ftype child_func,
442 /* The head of the procinfo list: */
443 static procinfo * procinfo_list;
445 /* Search the procinfo list. Return a pointer to procinfo, or NULL if
449 find_procinfo (int pid, int tid)
453 for (pi = procinfo_list; pi; pi = pi->next)
460 /* Don't check threads_valid. If we're updating the
461 thread_list, we want to find whatever threads are already
462 here. This means that in general it is the caller's
463 responsibility to check threads_valid and update before
464 calling find_procinfo, if the caller wants to find a new
467 for (pi = pi->thread_list; pi; pi = pi->next)
475 /* Calls find_procinfo, but errors on failure. */
478 find_procinfo_or_die (int pid, int tid)
480 procinfo *pi = find_procinfo (pid, tid);
485 error (_("procfs: couldn't find pid %d "
486 "(kernel thread %d) in procinfo list."),
489 error (_("procfs: couldn't find pid %d in procinfo list."), pid);
494 /* Wrapper for `open'. The appropriate open call is attempted; if
495 unsuccessful, it will be retried as many times as needed for the
496 EAGAIN and EINTR conditions.
498 For other conditions, retry the open a limited number of times. In
499 addition, a short sleep is imposed prior to retrying the open. The
500 reason for this sleep is to give the kernel a chance to catch up
501 and create the file in question in the event that GDB "wins" the
502 race to open a file before the kernel has created it. */
505 open_with_retry (const char *pathname, int flags)
507 int retries_remaining, status;
509 retries_remaining = 2;
513 status = open (pathname, flags);
515 if (status >= 0 || retries_remaining == 0)
517 else if (errno != EINTR && errno != EAGAIN)
527 /* Open the file descriptor for the process or LWP. If NEW_PROC_API
528 is defined, we only open the control file descriptor; the others
529 are opened lazily as needed. Otherwise (if not NEW_PROC_API),
530 there is only one real file descriptor, but we keep multiple copies
531 of it so that the code that uses them does not have to be #ifdef'd.
532 Returns the file descriptor, or zero for failure. */
534 enum { FD_CTL, FD_STATUS, FD_AS };
537 open_procinfo_files (procinfo *pi, int which)
540 char tmp[MAX_PROC_NAME_SIZE];
544 /* This function is getting ALMOST long enough to break up into
545 several. Here is some rationale:
547 NEW_PROC_API (Solaris 2.6, Solaris 2.7):
548 There are several file descriptors that may need to be open
549 for any given process or LWP. The ones we're intereted in are:
550 - control (ctl) write-only change the state
551 - status (status) read-only query the state
552 - address space (as) read/write access memory
553 - map (map) read-only virtual addr map
554 Most of these are opened lazily as they are needed.
555 The pathnames for the 'files' for an LWP look slightly
556 different from those of a first-class process:
557 Pathnames for a process (<proc-id>):
559 /proc/<proc-id>/status
562 Pathnames for an LWP (lwp-id):
563 /proc/<proc-id>/lwp/<lwp-id>/lwpctl
564 /proc/<proc-id>/lwp/<lwp-id>/lwpstatus
565 An LWP has no map or address space file descriptor, since
566 the memory map and address space are shared by all LWPs.
568 Everyone else (Solaris 2.5, Irix, OSF)
569 There is only one file descriptor for each process or LWP.
570 For convenience, we copy the same file descriptor into all
571 three fields of the procinfo struct (ctl_fd, status_fd, and
572 as_fd, see NEW_PROC_API above) so that code that uses them
573 doesn't need any #ifdef's.
578 Each LWP has an independent file descriptor, but these
579 are not obtained via the 'open' system call like the rest:
580 instead, they're obtained thru an ioctl call (PIOCOPENLWP)
581 to the file descriptor of the parent process.
584 These do not even have their own independent file descriptor.
585 All operations are carried out on the file descriptor of the
586 parent process. Therefore we just call open again for each
587 thread, getting a new handle for the same 'file'. */
590 /* In this case, there are several different file descriptors that
591 we might be asked to open. The control file descriptor will be
592 opened early, but the others will be opened lazily as they are
595 strcpy (tmp, pi->pathname);
596 switch (which) { /* Which file descriptor to open? */
599 strcat (tmp, "/lwpctl");
601 strcat (tmp, "/ctl");
602 fd = open_with_retry (tmp, O_WRONLY);
609 return 0; /* There is no 'as' file descriptor for an lwp. */
611 fd = open_with_retry (tmp, O_RDWR);
618 strcat (tmp, "/lwpstatus");
620 strcat (tmp, "/status");
621 fd = open_with_retry (tmp, O_RDONLY);
627 return 0; /* unknown file descriptor */
629 #else /* not NEW_PROC_API */
630 /* In this case, there is only one file descriptor for each procinfo
631 (ie. each process or LWP). In fact, only the file descriptor for
632 the process can actually be opened by an 'open' system call. The
633 ones for the LWPs have to be obtained thru an IOCTL call on the
634 process's file descriptor.
636 For convenience, we copy each procinfo's single file descriptor
637 into all of the fields occupied by the several file descriptors
638 of the NEW_PROC_API implementation. That way, the code that uses
639 them can be written without ifdefs. */
642 #ifdef PIOCTSTATUS /* OSF */
643 /* Only one FD; just open it. */
644 if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0)
646 #else /* Sol 2.5, Irix, other? */
647 if (pi->tid == 0) /* Master procinfo for the process */
649 fd = open_with_retry (pi->pathname, O_RDWR);
653 else /* LWP thread procinfo */
655 #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */
659 /* Find the procinfo for the entire process. */
660 if ((process = find_procinfo (pi->pid, 0)) == NULL)
663 /* Now obtain the file descriptor for the LWP. */
664 if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0)
666 #else /* Irix, other? */
667 return 0; /* Don't know how to open threads. */
668 #endif /* Sol 2.5 PIOCOPENLWP */
670 #endif /* OSF PIOCTSTATUS */
671 pi->ctl_fd = pi->as_fd = pi->status_fd = fd;
672 #endif /* NEW_PROC_API */
674 return 1; /* success */
677 /* Allocate a data structure and link it into the procinfo list.
678 First tries to find a pre-existing one (FIXME: why?). Returns the
679 pointer to new procinfo struct. */
682 create_procinfo (int pid, int tid)
684 procinfo *pi, *parent = NULL;
686 if ((pi = find_procinfo (pid, tid)))
687 return pi; /* Already exists, nothing to do. */
689 /* Find parent before doing malloc, to save having to cleanup. */
691 parent = find_procinfo_or_die (pid, 0); /* FIXME: should I
693 doesn't exist yet? */
695 pi = (procinfo *) xmalloc (sizeof (procinfo));
696 memset (pi, 0, sizeof (procinfo));
700 #ifdef DYNAMIC_SYSCALLS
704 pi->saved_entryset = sysset_t_alloc (pi);
705 pi->saved_exitset = sysset_t_alloc (pi);
707 /* Chain into list. */
710 sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
711 pi->next = procinfo_list;
717 sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid);
719 sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
721 pi->next = parent->thread_list;
722 parent->thread_list = pi;
727 /* Close all file descriptors associated with the procinfo. */
730 close_procinfo_files (procinfo *pi)
737 if (pi->status_fd > 0)
738 close (pi->status_fd);
740 pi->ctl_fd = pi->as_fd = pi->status_fd = 0;
743 /* Destructor function. Close, unlink and deallocate the object. */
746 destroy_one_procinfo (procinfo **list, procinfo *pi)
750 /* Step one: unlink the procinfo from its list. */
754 for (ptr = *list; ptr; ptr = ptr->next)
757 ptr->next = pi->next;
761 /* Step two: close any open file descriptors. */
762 close_procinfo_files (pi);
764 /* Step three: free the memory. */
765 #ifdef DYNAMIC_SYSCALLS
768 xfree (pi->saved_entryset);
769 xfree (pi->saved_exitset);
774 destroy_procinfo (procinfo *pi)
778 if (pi->tid != 0) /* Destroy a thread procinfo. */
780 tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */
781 destroy_one_procinfo (&tmp->thread_list, pi);
783 else /* Destroy a process procinfo and all its threads. */
785 /* First destroy the children, if any; */
786 while (pi->thread_list != NULL)
787 destroy_one_procinfo (&pi->thread_list, pi->thread_list);
788 /* Then destroy the parent. Genocide!!! */
789 destroy_one_procinfo (&procinfo_list, pi);
794 do_destroy_procinfo_cleanup (void *pi)
796 destroy_procinfo (pi);
799 enum { NOKILL, KILL };
801 /* To be called on a non_recoverable error for a procinfo. Prints
802 error messages, optionally sends a SIGKILL to the process, then
803 destroys the data structure. */
806 dead_procinfo (procinfo *pi, char *msg, int kill_p)
812 print_sys_errmsg (pi->pathname, errno);
816 sprintf (procfile, "process %d", pi->pid);
817 print_sys_errmsg (procfile, errno);
820 kill (pi->pid, SIGKILL);
822 destroy_procinfo (pi);
826 /* Returns the (complete) size of a sysset_t struct. Normally, this
827 is just sizeof (sysset_t), but in the case of Monterey/64, the
828 actual size of sysset_t isn't known until runtime. */
831 sysset_t_size (procinfo * pi)
833 #ifndef DYNAMIC_SYSCALLS
834 return sizeof (sysset_t);
836 return sizeof (sysset_t) - sizeof (uint64_t)
837 + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
838 / (8 * sizeof (uint64_t)));
842 /* Allocate and (partially) initialize a sysset_t struct. */
845 sysset_t_alloc (procinfo * pi)
848 int size = sysset_t_size (pi);
850 ret = xmalloc (size);
851 #ifdef DYNAMIC_SYSCALLS
852 ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
853 / (8 * sizeof (uint64_t)));
858 #ifdef DYNAMIC_SYSCALLS
860 /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize
861 pi->num_syscalls with the number of syscalls and pi->syscall_names
862 with the names. (Certain numbers may be skipped in which case the
863 names for these numbers will be left as NULL.) */
865 #define MAX_SYSCALL_NAME_LENGTH 256
866 #define MAX_SYSCALLS 65536
869 load_syscalls (procinfo *pi)
871 char pathname[MAX_PROC_NAME_SIZE];
874 prsyscall_t *syscalls;
875 int i, size, maxcall;
876 struct cleanup *cleanups;
878 pi->num_syscalls = 0;
879 pi->syscall_names = 0;
881 /* Open the file descriptor for the sysent file. */
882 sprintf (pathname, "/proc/%d/sysent", pi->pid);
883 sysent_fd = open_with_retry (pathname, O_RDONLY);
886 error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid);
888 cleanups = make_cleanup_close (sysent_fd);
890 size = sizeof header - sizeof (prsyscall_t);
891 if (read (sysent_fd, &header, size) != size)
893 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
896 if (header.pr_nsyscalls == 0)
898 error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"),
902 size = header.pr_nsyscalls * sizeof (prsyscall_t);
903 syscalls = xmalloc (size);
904 make_cleanup (free_current_contents, &syscalls);
906 if (read (sysent_fd, syscalls, size) != size)
907 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
909 /* Find maximum syscall number. This may not be the same as
910 pr_nsyscalls since that value refers to the number of entries
911 in the table. (Also, the docs indicate that some system
912 call numbers may be skipped.) */
914 maxcall = syscalls[0].pr_number;
916 for (i = 1; i < header.pr_nsyscalls; i++)
917 if (syscalls[i].pr_number > maxcall
918 && syscalls[i].pr_nameoff > 0
919 && syscalls[i].pr_number < MAX_SYSCALLS)
920 maxcall = syscalls[i].pr_number;
922 pi->num_syscalls = maxcall+1;
923 pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *));
925 for (i = 0; i < pi->num_syscalls; i++)
926 pi->syscall_names[i] = NULL;
928 /* Read the syscall names in. */
929 for (i = 0; i < header.pr_nsyscalls; i++)
931 char namebuf[MAX_SYSCALL_NAME_LENGTH];
935 if (syscalls[i].pr_number >= MAX_SYSCALLS
936 || syscalls[i].pr_number < 0
937 || syscalls[i].pr_nameoff <= 0
938 || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET)
939 != (off_t) syscalls[i].pr_nameoff))
942 nread = read (sysent_fd, namebuf, sizeof namebuf);
946 callnum = syscalls[i].pr_number;
948 if (pi->syscall_names[callnum] != NULL)
950 /* FIXME: Generate warning. */
954 namebuf[nread-1] = '\0';
955 size = strlen (namebuf) + 1;
956 pi->syscall_names[callnum] = xmalloc (size);
957 strncpy (pi->syscall_names[callnum], namebuf, size-1);
958 pi->syscall_names[callnum][size-1] = '\0';
961 do_cleanups (cleanups);
964 /* Free the space allocated for the syscall names from the procinfo
968 free_syscalls (procinfo *pi)
970 if (pi->syscall_names)
974 for (i = 0; i < pi->num_syscalls; i++)
975 if (pi->syscall_names[i] != NULL)
976 xfree (pi->syscall_names[i]);
978 xfree (pi->syscall_names);
979 pi->syscall_names = 0;
983 /* Given a name, look up (and return) the corresponding syscall number.
984 If no match is found, return -1. */
987 find_syscall (procinfo *pi, char *name)
991 for (i = 0; i < pi->num_syscalls; i++)
993 if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0)
1000 /* =================== END, STRUCT PROCINFO "MODULE" =================== */
1002 /* =================== /proc "MODULE" =================== */
1004 /* This "module" is the interface layer between the /proc system API
1005 and the gdb target vector functions. This layer consists of access
1006 functions that encapsulate each of the basic operations that we
1007 need to use from the /proc API.
1009 The main motivation for this layer is to hide the fact that there
1010 are two very different implementations of the /proc API. Rather
1011 than have a bunch of #ifdefs all thru the gdb target vector
1012 functions, we do our best to hide them all in here. */
1014 static long proc_flags (procinfo * pi);
1015 static int proc_why (procinfo * pi);
1016 static int proc_what (procinfo * pi);
1017 static int proc_set_current_signal (procinfo * pi, int signo);
1018 static int proc_get_current_thread (procinfo * pi);
1019 static int proc_iterate_over_threads
1021 int (*func) (procinfo *, procinfo *, void *),
1025 proc_warn (procinfo *pi, char *func, int line)
1027 sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
1028 print_sys_errmsg (errmsg, errno);
1032 proc_error (procinfo *pi, char *func, int line)
1034 sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
1035 perror_with_name (errmsg);
1038 /* Updates the status struct in the procinfo. There is a 'valid'
1039 flag, to let other functions know when this function needs to be
1040 called (so the status is only read when it is needed). The status
1041 file descriptor is also only opened when it is needed. Returns
1042 non-zero for success, zero for failure. */
1045 proc_get_status (procinfo *pi)
1047 /* Status file descriptor is opened "lazily". */
1048 if (pi->status_fd == 0 &&
1049 open_procinfo_files (pi, FD_STATUS) == 0)
1051 pi->status_valid = 0;
1056 if (lseek (pi->status_fd, 0, SEEK_SET) < 0)
1057 pi->status_valid = 0; /* fail */
1060 /* Sigh... I have to read a different data structure,
1061 depending on whether this is a main process or an LWP. */
1063 pi->status_valid = (read (pi->status_fd,
1064 (char *) &pi->prstatus.pr_lwp,
1065 sizeof (lwpstatus_t))
1066 == sizeof (lwpstatus_t));
1069 pi->status_valid = (read (pi->status_fd,
1070 (char *) &pi->prstatus,
1071 sizeof (gdb_prstatus_t))
1072 == sizeof (gdb_prstatus_t));
1075 #else /* ioctl method */
1076 #ifdef PIOCTSTATUS /* osf */
1077 if (pi->tid == 0) /* main process */
1079 /* Just read the danged status. Now isn't that simple? */
1081 (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
1088 tid_t pr_error_thread;
1089 struct prstatus status;
1092 thread_status.pr_count = 1;
1093 thread_status.status.pr_tid = pi->tid;
1094 win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0);
1097 memcpy (&pi->prstatus, &thread_status.status,
1098 sizeof (pi->prstatus));
1099 pi->status_valid = 1;
1103 /* Just read the danged status. Now isn't that simple? */
1104 pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
1108 if (pi->status_valid)
1110 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1113 proc_get_current_thread (pi));
1116 /* The status struct includes general regs, so mark them valid too. */
1117 pi->gregs_valid = pi->status_valid;
1119 /* In the read/write multiple-fd model, the status struct includes
1120 the fp regs too, so mark them valid too. */
1121 pi->fpregs_valid = pi->status_valid;
1123 return pi->status_valid; /* True if success, false if failure. */
1126 /* Returns the process flags (pr_flags field). */
1129 proc_flags (procinfo *pi)
1131 if (!pi->status_valid)
1132 if (!proc_get_status (pi))
1133 return 0; /* FIXME: not a good failure value (but what is?) */
1136 return pi->prstatus.pr_lwp.pr_flags;
1138 return pi->prstatus.pr_flags;
1142 /* Returns the pr_why field (why the process stopped). */
1145 proc_why (procinfo *pi)
1147 if (!pi->status_valid)
1148 if (!proc_get_status (pi))
1149 return 0; /* FIXME: not a good failure value (but what is?) */
1152 return pi->prstatus.pr_lwp.pr_why;
1154 return pi->prstatus.pr_why;
1158 /* Returns the pr_what field (details of why the process stopped). */
1161 proc_what (procinfo *pi)
1163 if (!pi->status_valid)
1164 if (!proc_get_status (pi))
1165 return 0; /* FIXME: not a good failure value (but what is?) */
1168 return pi->prstatus.pr_lwp.pr_what;
1170 return pi->prstatus.pr_what;
1174 /* This function is only called when PI is stopped by a watchpoint.
1175 Assuming the OS supports it, write to *ADDR the data address which
1176 triggered it and return 1. Return 0 if it is not possible to know
1180 proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr)
1182 if (!pi->status_valid)
1183 if (!proc_get_status (pi))
1187 *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (),
1188 builtin_type (target_gdbarch ())->builtin_data_ptr,
1189 (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr);
1191 *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (),
1192 builtin_type (target_gdbarch ())->builtin_data_ptr,
1193 (gdb_byte *) &pi->prstatus.pr_info.si_addr);
1198 #ifndef PIOCSSPCACT /* The following is not supported on OSF. */
1200 /* Returns the pr_nsysarg field (number of args to the current
1204 proc_nsysarg (procinfo *pi)
1206 if (!pi->status_valid)
1207 if (!proc_get_status (pi))
1211 return pi->prstatus.pr_lwp.pr_nsysarg;
1213 return pi->prstatus.pr_nsysarg;
1217 /* Returns the pr_sysarg field (pointer to the arguments of current
1221 proc_sysargs (procinfo *pi)
1223 if (!pi->status_valid)
1224 if (!proc_get_status (pi))
1228 return (long *) &pi->prstatus.pr_lwp.pr_sysarg;
1230 return (long *) &pi->prstatus.pr_sysarg;
1233 #endif /* PIOCSSPCACT */
1235 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
1236 /* Returns the pr_cursig field (current signal). */
1239 proc_cursig (struct procinfo *pi)
1241 if (!pi->status_valid)
1242 if (!proc_get_status (pi))
1243 return 0; /* FIXME: not a good failure value (but what is?) */
1246 return pi->prstatus.pr_lwp.pr_cursig;
1248 return pi->prstatus.pr_cursig;
1251 #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */
1253 /* === I appologize for the messiness of this function.
1254 === This is an area where the different versions of
1255 === /proc are more inconsistent than usual.
1257 Set or reset any of the following process flags:
1258 PR_FORK -- forked child will inherit trace flags
1259 PR_RLC -- traced process runs when last /proc file closed.
1260 PR_KLC -- traced process is killed when last /proc file closed.
1261 PR_ASYNC -- LWP's get to run/stop independently.
1263 There are three methods for doing this function:
1264 1) Newest: read/write [PCSET/PCRESET/PCUNSET]
1266 2) Middle: PIOCSET/PIOCRESET
1268 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC
1271 Note: Irix does not define PR_ASYNC.
1272 Note: OSF does not define PR_KLC.
1273 Note: OSF is the only one that can ONLY use the oldest method.
1277 flag -- one of PR_FORK, PR_RLC, or PR_ASYNC
1278 mode -- 1 for set, 0 for reset.
1280 Returns non-zero for success, zero for failure. */
1282 enum { FLAG_RESET, FLAG_SET };
1285 proc_modify_flag (procinfo *pi, long flag, long mode)
1287 long win = 0; /* default to fail */
1289 /* These operations affect the process as a whole, and applying them
1290 to an individual LWP has the same meaning as applying them to the
1291 main process. Therefore, if we're ever called with a pointer to
1292 an LWP's procinfo, let's substitute the process's procinfo and
1293 avoid opening the LWP's file descriptor unnecessarily. */
1296 pi = find_procinfo_or_die (pi->pid, 0);
1298 #ifdef NEW_PROC_API /* Newest method: Newer Solarii. */
1299 /* First normalize the PCUNSET/PCRESET command opcode
1300 (which for no obvious reason has a different definition
1301 from one operating system to the next...) */
1303 #define GDBRESET PCUNSET
1306 #define GDBRESET PCRESET
1310 procfs_ctl_t arg[2];
1312 if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */
1314 else /* Reset the flag. */
1318 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
1321 #ifdef PIOCSET /* Irix/Sol5 method */
1322 if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */
1324 win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0);
1326 else /* Reset the flag. */
1328 win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0);
1332 #ifdef PIOCSRLC /* Oldest method: OSF */
1335 if (mode == FLAG_SET) /* Set run-on-last-close */
1337 win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0);
1339 else /* Clear run-on-last-close */
1341 win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0);
1345 if (mode == FLAG_SET) /* Set inherit-on-fork */
1347 win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0);
1349 else /* Clear inherit-on-fork */
1351 win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0);
1355 win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */
1362 /* The above operation renders the procinfo's cached pstatus
1364 pi->status_valid = 0;
1367 warning (_("procfs: modify_flag failed to turn %s %s"),
1368 flag == PR_FORK ? "PR_FORK" :
1369 flag == PR_RLC ? "PR_RLC" :
1371 flag == PR_ASYNC ? "PR_ASYNC" :
1374 flag == PR_KLC ? "PR_KLC" :
1377 mode == FLAG_RESET ? "off" : "on");
1382 /* Set the run_on_last_close flag. Process with all threads will
1383 become runnable when debugger closes all /proc fds. Returns
1384 non-zero for success, zero for failure. */
1387 proc_set_run_on_last_close (procinfo *pi)
1389 return proc_modify_flag (pi, PR_RLC, FLAG_SET);
1392 /* Reset the run_on_last_close flag. The process will NOT become
1393 runnable when debugger closes its file handles. Returns non-zero
1394 for success, zero for failure. */
1397 proc_unset_run_on_last_close (procinfo *pi)
1399 return proc_modify_flag (pi, PR_RLC, FLAG_RESET);
1402 /* Reset inherit_on_fork flag. If the process forks a child while we
1403 are registered for events in the parent, then we will NOT recieve
1404 events from the child. Returns non-zero for success, zero for
1408 proc_unset_inherit_on_fork (procinfo *pi)
1410 return proc_modify_flag (pi, PR_FORK, FLAG_RESET);
1414 /* Set PR_ASYNC flag. If one LWP stops because of a debug event
1415 (signal etc.), the remaining LWPs will continue to run. Returns
1416 non-zero for success, zero for failure. */
1419 proc_set_async (procinfo *pi)
1421 return proc_modify_flag (pi, PR_ASYNC, FLAG_SET);
1424 /* Reset PR_ASYNC flag. If one LWP stops because of a debug event
1425 (signal etc.), then all other LWPs will stop as well. Returns
1426 non-zero for success, zero for failure. */
1429 proc_unset_async (procinfo *pi)
1431 return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET);
1433 #endif /* PR_ASYNC */
1435 /* Request the process/LWP to stop. Does not wait. Returns non-zero
1436 for success, zero for failure. */
1439 proc_stop_process (procinfo *pi)
1443 /* We might conceivably apply this operation to an LWP, and the
1444 LWP's ctl file descriptor might not be open. */
1446 if (pi->ctl_fd == 0 &&
1447 open_procinfo_files (pi, FD_CTL) == 0)
1452 procfs_ctl_t cmd = PCSTOP;
1454 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1455 #else /* ioctl method */
1456 win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0);
1457 /* Note: the call also reads the prstatus. */
1460 pi->status_valid = 1;
1461 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1464 proc_get_current_thread (pi));
1472 /* Wait for the process or LWP to stop (block until it does). Returns
1473 non-zero for success, zero for failure. */
1476 proc_wait_for_stop (procinfo *pi)
1480 /* We should never have to apply this operation to any procinfo
1481 except the one for the main process. If that ever changes for
1482 any reason, then take out the following clause and replace it
1483 with one that makes sure the ctl_fd is open. */
1486 pi = find_procinfo_or_die (pi->pid, 0);
1490 procfs_ctl_t cmd = PCWSTOP;
1492 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1493 /* We been runnin' and we stopped -- need to update status. */
1494 pi->status_valid = 0;
1496 #else /* ioctl method */
1497 win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0);
1498 /* Above call also refreshes the prstatus. */
1501 pi->status_valid = 1;
1502 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1505 proc_get_current_thread (pi));
1512 /* Make the process or LWP runnable.
1514 Options (not all are implemented):
1516 - clear current fault
1517 - clear current signal
1518 - abort the current system call
1519 - stop as soon as finished with system call
1520 - (ioctl): set traced signal set
1521 - (ioctl): set held signal set
1522 - (ioctl): set traced fault set
1523 - (ioctl): set start pc (vaddr)
1525 Always clears the current fault. PI is the process or LWP to
1526 operate on. If STEP is true, set the process or LWP to trap after
1527 one instruction. If SIGNO is zero, clear the current signal if
1528 any; if non-zero, set the current signal to this one. Returns
1529 non-zero for success, zero for failure. */
1532 proc_run_process (procinfo *pi, int step, int signo)
1537 /* We will probably have to apply this operation to individual
1538 threads, so make sure the control file descriptor is open. */
1540 if (pi->ctl_fd == 0 &&
1541 open_procinfo_files (pi, FD_CTL) == 0)
1546 runflags = PRCFAULT; /* Always clear current fault. */
1551 else if (signo != -1) /* -1 means do nothing W.R.T. signals. */
1552 proc_set_current_signal (pi, signo);
1556 procfs_ctl_t cmd[2];
1560 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1562 #else /* ioctl method */
1566 memset (&prrun, 0, sizeof (prrun));
1567 prrun.pr_flags = runflags;
1568 win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0);
1575 /* Register to trace signals in the process or LWP. Returns non-zero
1576 for success, zero for failure. */
1579 proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset)
1583 /* We should never have to apply this operation to any procinfo
1584 except the one for the main process. If that ever changes for
1585 any reason, then take out the following clause and replace it
1586 with one that makes sure the ctl_fd is open. */
1589 pi = find_procinfo_or_die (pi->pid, 0);
1595 /* Use char array to avoid alignment issues. */
1596 char sigset[sizeof (gdb_sigset_t)];
1600 memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t));
1602 win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
1604 #else /* ioctl method */
1605 win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0);
1607 /* The above operation renders the procinfo's cached pstatus obsolete. */
1608 pi->status_valid = 0;
1611 warning (_("procfs: set_traced_signals failed"));
1615 /* Register to trace hardware faults in the process or LWP. Returns
1616 non-zero for success, zero for failure. */
1619 proc_set_traced_faults (procinfo *pi, fltset_t *fltset)
1623 /* We should never have to apply this operation to any procinfo
1624 except the one for the main process. If that ever changes for
1625 any reason, then take out the following clause and replace it
1626 with one that makes sure the ctl_fd is open. */
1629 pi = find_procinfo_or_die (pi->pid, 0);
1635 /* Use char array to avoid alignment issues. */
1636 char fltset[sizeof (fltset_t)];
1640 memcpy (&arg.fltset, fltset, sizeof (fltset_t));
1642 win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
1644 #else /* ioctl method */
1645 win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0);
1647 /* The above operation renders the procinfo's cached pstatus obsolete. */
1648 pi->status_valid = 0;
1653 /* Register to trace entry to system calls in the process or LWP.
1654 Returns non-zero for success, zero for failure. */
1657 proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset)
1661 /* We should never have to apply this operation to any procinfo
1662 except the one for the main process. If that ever changes for
1663 any reason, then take out the following clause and replace it
1664 with one that makes sure the ctl_fd is open. */
1667 pi = find_procinfo_or_die (pi->pid, 0);
1671 struct gdb_proc_ctl_pcsentry {
1673 /* Use char array to avoid alignment issues. */
1674 char sysset[sizeof (sysset_t)];
1676 int argp_size = sizeof (struct gdb_proc_ctl_pcsentry)
1678 + sysset_t_size (pi);
1680 argp = xmalloc (argp_size);
1682 argp->cmd = PCSENTRY;
1683 memcpy (&argp->sysset, sysset, sysset_t_size (pi));
1685 win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
1688 #else /* ioctl method */
1689 win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0);
1691 /* The above operation renders the procinfo's cached pstatus
1693 pi->status_valid = 0;
1698 /* Register to trace exit from system calls in the process or LWP.
1699 Returns non-zero for success, zero for failure. */
1702 proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset)
1706 /* We should never have to apply this operation to any procinfo
1707 except the one for the main process. If that ever changes for
1708 any reason, then take out the following clause and replace it
1709 with one that makes sure the ctl_fd is open. */
1712 pi = find_procinfo_or_die (pi->pid, 0);
1716 struct gdb_proc_ctl_pcsexit {
1718 /* Use char array to avoid alignment issues. */
1719 char sysset[sizeof (sysset_t)];
1721 int argp_size = sizeof (struct gdb_proc_ctl_pcsexit)
1723 + sysset_t_size (pi);
1725 argp = xmalloc (argp_size);
1727 argp->cmd = PCSEXIT;
1728 memcpy (&argp->sysset, sysset, sysset_t_size (pi));
1730 win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
1733 #else /* ioctl method */
1734 win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0);
1736 /* The above operation renders the procinfo's cached pstatus
1738 pi->status_valid = 0;
1743 /* Specify the set of blocked / held signals in the process or LWP.
1744 Returns non-zero for success, zero for failure. */
1747 proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold)
1751 /* We should never have to apply this operation to any procinfo
1752 except the one for the main process. If that ever changes for
1753 any reason, then take out the following clause and replace it
1754 with one that makes sure the ctl_fd is open. */
1757 pi = find_procinfo_or_die (pi->pid, 0);
1763 /* Use char array to avoid alignment issues. */
1764 char hold[sizeof (gdb_sigset_t)];
1768 memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t));
1769 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
1772 win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0);
1774 /* The above operation renders the procinfo's cached pstatus
1776 pi->status_valid = 0;
1781 /* Returns the set of signals that are held / blocked. Will also copy
1782 the sigset if SAVE is non-zero. */
1784 static gdb_sigset_t *
1785 proc_get_held_signals (procinfo *pi, gdb_sigset_t *save)
1787 gdb_sigset_t *ret = NULL;
1789 /* We should never have to apply this operation to any procinfo
1790 except the one for the main process. If that ever changes for
1791 any reason, then take out the following clause and replace it
1792 with one that makes sure the ctl_fd is open. */
1795 pi = find_procinfo_or_die (pi->pid, 0);
1798 if (!pi->status_valid)
1799 if (!proc_get_status (pi))
1802 ret = &pi->prstatus.pr_lwp.pr_lwphold;
1803 #else /* not NEW_PROC_API */
1805 static gdb_sigset_t sigheld;
1807 if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0)
1810 #endif /* NEW_PROC_API */
1812 memcpy (save, ret, sizeof (gdb_sigset_t));
1817 /* Returns the set of signals that are traced / debugged. Will also
1818 copy the sigset if SAVE is non-zero. */
1820 static gdb_sigset_t *
1821 proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save)
1823 gdb_sigset_t *ret = NULL;
1825 /* We should never have to apply this operation to any procinfo
1826 except the one for the main process. If that ever changes for
1827 any reason, then take out the following clause and replace it
1828 with one that makes sure the ctl_fd is open. */
1831 pi = find_procinfo_or_die (pi->pid, 0);
1834 if (!pi->status_valid)
1835 if (!proc_get_status (pi))
1838 ret = &pi->prstatus.pr_sigtrace;
1841 static gdb_sigset_t sigtrace;
1843 if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0)
1848 memcpy (save, ret, sizeof (gdb_sigset_t));
1853 /* Returns the set of hardware faults that are traced /debugged. Will
1854 also copy the faultset if SAVE is non-zero. */
1857 proc_get_traced_faults (procinfo *pi, fltset_t *save)
1859 fltset_t *ret = NULL;
1861 /* We should never have to apply this operation to any procinfo
1862 except the one for the main process. If that ever changes for
1863 any reason, then take out the following clause and replace it
1864 with one that makes sure the ctl_fd is open. */
1867 pi = find_procinfo_or_die (pi->pid, 0);
1870 if (!pi->status_valid)
1871 if (!proc_get_status (pi))
1874 ret = &pi->prstatus.pr_flttrace;
1877 static fltset_t flttrace;
1879 if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0)
1884 memcpy (save, ret, sizeof (fltset_t));
1889 /* Returns the set of syscalls that are traced /debugged on entry.
1890 Will also copy the syscall set if SAVE is non-zero. */
1893 proc_get_traced_sysentry (procinfo *pi, sysset_t *save)
1895 sysset_t *ret = NULL;
1897 /* We should never have to apply this operation to any procinfo
1898 except the one for the main process. If that ever changes for
1899 any reason, then take out the following clause and replace it
1900 with one that makes sure the ctl_fd is open. */
1903 pi = find_procinfo_or_die (pi->pid, 0);
1906 if (!pi->status_valid)
1907 if (!proc_get_status (pi))
1910 #ifndef DYNAMIC_SYSCALLS
1911 ret = &pi->prstatus.pr_sysentry;
1912 #else /* DYNAMIC_SYSCALLS */
1914 static sysset_t *sysentry;
1918 sysentry = sysset_t_alloc (pi);
1920 if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
1922 if (pi->prstatus.pr_sysentry_offset == 0)
1924 gdb_premptysysset (sysentry);
1930 if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset,
1932 != (off_t) pi->prstatus.pr_sysentry_offset)
1934 size = sysset_t_size (pi);
1935 gdb_premptysysset (sysentry);
1936 rsize = read (pi->status_fd, sysentry, size);
1941 #endif /* DYNAMIC_SYSCALLS */
1942 #else /* !NEW_PROC_API */
1944 static sysset_t sysentry;
1946 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0)
1949 #endif /* NEW_PROC_API */
1951 memcpy (save, ret, sysset_t_size (pi));
1956 /* Returns the set of syscalls that are traced /debugged on exit.
1957 Will also copy the syscall set if SAVE is non-zero. */
1960 proc_get_traced_sysexit (procinfo *pi, sysset_t *save)
1962 sysset_t * ret = NULL;
1964 /* We should never have to apply this operation to any procinfo
1965 except the one for the main process. If that ever changes for
1966 any reason, then take out the following clause and replace it
1967 with one that makes sure the ctl_fd is open. */
1970 pi = find_procinfo_or_die (pi->pid, 0);
1973 if (!pi->status_valid)
1974 if (!proc_get_status (pi))
1977 #ifndef DYNAMIC_SYSCALLS
1978 ret = &pi->prstatus.pr_sysexit;
1979 #else /* DYNAMIC_SYSCALLS */
1981 static sysset_t *sysexit;
1985 sysexit = sysset_t_alloc (pi);
1987 if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
1989 if (pi->prstatus.pr_sysexit_offset == 0)
1991 gdb_premptysysset (sysexit);
1997 if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset,
1999 != (off_t) pi->prstatus.pr_sysexit_offset)
2001 size = sysset_t_size (pi);
2002 gdb_premptysysset (sysexit);
2003 rsize = read (pi->status_fd, sysexit, size);
2008 #endif /* DYNAMIC_SYSCALLS */
2011 static sysset_t sysexit;
2013 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0)
2018 memcpy (save, ret, sysset_t_size (pi));
2023 /* The current fault (if any) is cleared; the associated signal will
2024 not be sent to the process or LWP when it resumes. Returns
2025 non-zero for success, zero for failure. */
2028 proc_clear_current_fault (procinfo *pi)
2032 /* We should never have to apply this operation to any procinfo
2033 except the one for the main process. If that ever changes for
2034 any reason, then take out the following clause and replace it
2035 with one that makes sure the ctl_fd is open. */
2038 pi = find_procinfo_or_die (pi->pid, 0);
2042 procfs_ctl_t cmd = PCCFAULT;
2044 win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd));
2047 win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0);
2053 /* Set the "current signal" that will be delivered next to the
2054 process. NOTE: semantics are different from those of KILL. This
2055 signal will be delivered to the process or LWP immediately when it
2056 is resumed (even if the signal is held/blocked); it will NOT
2057 immediately cause another event of interest, and will NOT first
2058 trap back to the debugger. Returns non-zero for success, zero for
2062 proc_set_current_signal (procinfo *pi, int signo)
2067 /* Use char array to avoid alignment issues. */
2068 char sinfo[sizeof (gdb_siginfo_t)];
2070 gdb_siginfo_t mysinfo;
2072 struct target_waitstatus wait_status;
2074 /* We should never have to apply this operation to any procinfo
2075 except the one for the main process. If that ever changes for
2076 any reason, then take out the following clause and replace it
2077 with one that makes sure the ctl_fd is open. */
2080 pi = find_procinfo_or_die (pi->pid, 0);
2082 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
2083 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
2084 receives a PIOCSSIG with a signal identical to the current
2085 signal, it messes up the current signal. Work around the kernel
2088 signo == proc_cursig (pi))
2089 return 1; /* I assume this is a success? */
2092 /* The pointer is just a type alias. */
2093 get_last_target_status (&wait_ptid, &wait_status);
2094 if (ptid_equal (wait_ptid, inferior_ptid)
2095 && wait_status.kind == TARGET_WAITKIND_STOPPED
2096 && wait_status.value.sig == gdb_signal_from_host (signo)
2097 && proc_get_status (pi)
2099 && pi->prstatus.pr_lwp.pr_info.si_signo == signo
2101 && pi->prstatus.pr_info.si_signo == signo
2104 /* Use the siginfo associated with the signal being
2107 memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t));
2109 memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t));
2113 mysinfo.si_signo = signo;
2114 mysinfo.si_code = 0;
2115 mysinfo.si_pid = getpid (); /* ?why? */
2116 mysinfo.si_uid = getuid (); /* ?why? */
2117 memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t));
2122 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2124 win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0);
2130 /* The current signal (if any) is cleared, and is not sent to the
2131 process or LWP when it resumes. Returns non-zero for success, zero
2135 proc_clear_current_signal (procinfo *pi)
2139 /* We should never have to apply this operation to any procinfo
2140 except the one for the main process. If that ever changes for
2141 any reason, then take out the following clause and replace it
2142 with one that makes sure the ctl_fd is open. */
2145 pi = find_procinfo_or_die (pi->pid, 0);
2151 /* Use char array to avoid alignment issues. */
2152 char sinfo[sizeof (gdb_siginfo_t)];
2154 gdb_siginfo_t mysinfo;
2157 /* The pointer is just a type alias. */
2158 mysinfo.si_signo = 0;
2159 mysinfo.si_code = 0;
2160 mysinfo.si_errno = 0;
2161 mysinfo.si_pid = getpid (); /* ?why? */
2162 mysinfo.si_uid = getuid (); /* ?why? */
2163 memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t));
2165 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2168 win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0);
2174 /* Return the general-purpose registers for the process or LWP
2175 corresponding to PI. Upon failure, return NULL. */
2177 static gdb_gregset_t *
2178 proc_get_gregs (procinfo *pi)
2180 if (!pi->status_valid || !pi->gregs_valid)
2181 if (!proc_get_status (pi))
2185 return &pi->prstatus.pr_lwp.pr_reg;
2187 return &pi->prstatus.pr_reg;
2191 /* Return the general-purpose registers for the process or LWP
2192 corresponding to PI. Upon failure, return NULL. */
2194 static gdb_fpregset_t *
2195 proc_get_fpregs (procinfo *pi)
2198 if (!pi->status_valid || !pi->fpregs_valid)
2199 if (!proc_get_status (pi))
2202 return &pi->prstatus.pr_lwp.pr_fpreg;
2204 #else /* not NEW_PROC_API */
2205 if (pi->fpregs_valid)
2206 return &pi->fpregset; /* Already got 'em. */
2209 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2218 tid_t pr_error_thread;
2219 tfpregset_t thread_1;
2222 thread_fpregs.pr_count = 1;
2223 thread_fpregs.thread_1.tid = pi->tid;
2226 && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
2228 pi->fpregs_valid = 1;
2229 return &pi->fpregset; /* Got 'em now! */
2231 else if (pi->tid != 0
2232 && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0)
2234 memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs,
2235 sizeof (pi->fpregset));
2236 pi->fpregs_valid = 1;
2237 return &pi->fpregset; /* Got 'em now! */
2244 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
2246 pi->fpregs_valid = 1;
2247 return &pi->fpregset; /* Got 'em now! */
2256 #endif /* NEW_PROC_API */
2259 /* Write the general-purpose registers back to the process or LWP
2260 corresponding to PI. Return non-zero for success, zero for
2264 proc_set_gregs (procinfo *pi)
2266 gdb_gregset_t *gregs;
2269 gregs = proc_get_gregs (pi);
2271 return 0; /* proc_get_regs has already warned. */
2273 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2282 /* Use char array to avoid alignment issues. */
2283 char gregs[sizeof (gdb_gregset_t)];
2287 memcpy (&arg.gregs, gregs, sizeof (arg.gregs));
2288 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2290 win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0);
2294 /* Policy: writing the registers invalidates our cache. */
2295 pi->gregs_valid = 0;
2299 /* Write the floating-pointer registers back to the process or LWP
2300 corresponding to PI. Return non-zero for success, zero for
2304 proc_set_fpregs (procinfo *pi)
2306 gdb_fpregset_t *fpregs;
2309 fpregs = proc_get_fpregs (pi);
2311 return 0; /* proc_get_fpregs has already warned. */
2313 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2322 /* Use char array to avoid alignment issues. */
2323 char fpregs[sizeof (gdb_fpregset_t)];
2327 memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs));
2328 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2332 win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
2337 tid_t pr_error_thread;
2338 tfpregset_t thread_1;
2341 thread_fpregs.pr_count = 1;
2342 thread_fpregs.thread_1.tid = pi->tid;
2343 memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs,
2345 win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0);
2348 win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
2350 #endif /* NEW_PROC_API */
2353 /* Policy: writing the registers invalidates our cache. */
2354 pi->fpregs_valid = 0;
2358 /* Send a signal to the proc or lwp with the semantics of "kill()".
2359 Returns non-zero for success, zero for failure. */
2362 proc_kill (procinfo *pi, int signo)
2366 /* We might conceivably apply this operation to an LWP, and the
2367 LWP's ctl file descriptor might not be open. */
2369 if (pi->ctl_fd == 0 &&
2370 open_procinfo_files (pi, FD_CTL) == 0)
2377 procfs_ctl_t cmd[2];
2381 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
2382 #else /* ioctl method */
2383 /* FIXME: do I need the Alpha OSF fixups present in
2384 procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */
2385 win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0);
2392 /* Find the pid of the process that started this one. Returns the
2393 parent process pid, or zero. */
2396 proc_parent_pid (procinfo *pi)
2398 /* We should never have to apply this operation to any procinfo
2399 except the one for the main process. If that ever changes for
2400 any reason, then take out the following clause and replace it
2401 with one that makes sure the ctl_fd is open. */
2404 pi = find_procinfo_or_die (pi->pid, 0);
2406 if (!pi->status_valid)
2407 if (!proc_get_status (pi))
2410 return pi->prstatus.pr_ppid;
2413 /* Convert a target address (a.k.a. CORE_ADDR) into a host address
2414 (a.k.a void pointer)! */
2416 #if (defined (PCWATCH) || defined (PIOCSWATCH)) \
2417 && !(defined (PIOCOPENLWP))
2419 procfs_address_to_host_pointer (CORE_ADDR addr)
2421 struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
2424 gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type));
2425 gdbarch_address_to_pointer (target_gdbarch (), ptr_type,
2426 (gdb_byte *) &ptr, addr);
2432 proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags)
2434 #if !defined (PCWATCH) && !defined (PIOCSWATCH)
2435 /* If neither or these is defined, we can't support watchpoints.
2436 This just avoids possibly failing to compile the below on such
2440 /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */
2441 #if defined (PIOCOPENLWP) /* Solaris 2.5: bail out. */
2446 char watch[sizeof (prwatch_t)];
2450 /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to
2451 convert a target address into something that can be stored in a
2452 native data structure. */
2453 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
2454 pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr);
2456 pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr);
2458 pwatch.pr_size = len;
2459 pwatch.pr_wflags = wflags;
2460 #if defined(NEW_PROC_API) && defined (PCWATCH)
2462 memcpy (arg.watch, &pwatch, sizeof (prwatch_t));
2463 return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg));
2465 #if defined (PIOCSWATCH)
2466 return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0);
2468 return 0; /* Fail */
2475 #if (defined(__i386__) || defined(__x86_64__)) && defined (sun)
2477 #include <sys/sysi86.h>
2479 /* The KEY is actually the value of the lower 16 bits of the GS
2480 register for the LWP that we're interested in. Returns the
2481 matching ssh struct (LDT entry). */
2484 proc_get_LDT_entry (procinfo *pi, int key)
2486 static struct ssd *ldt_entry = NULL;
2488 char pathname[MAX_PROC_NAME_SIZE];
2489 struct cleanup *old_chain = NULL;
2492 /* Allocate space for one LDT entry.
2493 This alloc must persist, because we return a pointer to it. */
2494 if (ldt_entry == NULL)
2495 ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd));
2497 /* Open the file descriptor for the LDT table. */
2498 sprintf (pathname, "/proc/%d/ldt", pi->pid);
2499 if ((fd = open_with_retry (pathname, O_RDONLY)) < 0)
2501 proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__);
2504 /* Make sure it gets closed again! */
2505 old_chain = make_cleanup_close (fd);
2507 /* Now 'read' thru the table, find a match and return it. */
2508 while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd))
2510 if (ldt_entry->sel == 0 &&
2511 ldt_entry->bo == 0 &&
2512 ldt_entry->acc1 == 0 &&
2513 ldt_entry->acc2 == 0)
2514 break; /* end of table */
2515 /* If key matches, return this entry. */
2516 if (ldt_entry->sel == key)
2519 /* Loop ended, match not found. */
2523 static int nalloc = 0;
2525 /* Get the number of LDT entries. */
2526 if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0)
2528 proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__);
2532 /* Allocate space for the number of LDT entries. */
2533 /* This alloc has to persist, 'cause we return a pointer to it. */
2536 ldt_entry = (struct ssd *)
2537 xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd));
2541 /* Read the whole table in one gulp. */
2542 if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0)
2544 proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__);
2548 /* Search the table and return the (first) entry matching 'key'. */
2549 for (i = 0; i < nldt; i++)
2550 if (ldt_entry[i].sel == key)
2551 return &ldt_entry[i];
2553 /* Loop ended, match not found. */
2558 /* Returns the pointer to the LDT entry of PTID. */
2561 procfs_find_LDT_entry (ptid_t ptid)
2563 gdb_gregset_t *gregs;
2567 /* Find procinfo for the lwp. */
2568 if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL)
2570 warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."),
2571 ptid_get_pid (ptid), ptid_get_lwp (ptid));
2574 /* get its general registers. */
2575 if ((gregs = proc_get_gregs (pi)) == NULL)
2577 warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."),
2578 ptid_get_pid (ptid), ptid_get_lwp (ptid));
2581 /* Now extract the GS register's lower 16 bits. */
2582 key = (*gregs)[GS] & 0xffff;
2584 /* Find the matching entry and return it. */
2585 return proc_get_LDT_entry (pi, key);
2590 /* =============== END, non-thread part of /proc "MODULE" =============== */
2592 /* =================== Thread "MODULE" =================== */
2594 /* NOTE: you'll see more ifdefs and duplication of functions here,
2595 since there is a different way to do threads on every OS. */
2597 /* Returns the number of threads for the process. */
2599 #if defined (PIOCNTHR) && defined (PIOCTLIST)
2602 proc_get_nthreads (procinfo *pi)
2606 if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0)
2607 proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__);
2613 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
2614 /* Solaris version */
2616 proc_get_nthreads (procinfo *pi)
2618 if (!pi->status_valid)
2619 if (!proc_get_status (pi))
2622 /* NEW_PROC_API: only works for the process procinfo, because the
2623 LWP procinfos do not get prstatus filled in. */
2625 if (pi->tid != 0) /* Find the parent process procinfo. */
2626 pi = find_procinfo_or_die (pi->pid, 0);
2628 return pi->prstatus.pr_nlwp;
2632 /* Default version */
2634 proc_get_nthreads (procinfo *pi)
2643 Return the ID of the thread that had an event of interest.
2644 (ie. the one that hit a breakpoint or other traced event). All
2645 other things being equal, this should be the ID of a thread that is
2646 currently executing. */
2648 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
2649 /* Solaris version */
2651 proc_get_current_thread (procinfo *pi)
2653 /* Note: this should be applied to the root procinfo for the
2654 process, not to the procinfo for an LWP. If applied to the
2655 procinfo for an LWP, it will simply return that LWP's ID. In
2656 that case, find the parent process procinfo. */
2659 pi = find_procinfo_or_die (pi->pid, 0);
2661 if (!pi->status_valid)
2662 if (!proc_get_status (pi))
2666 return pi->prstatus.pr_lwp.pr_lwpid;
2668 return pi->prstatus.pr_who;
2673 #if defined (PIOCNTHR) && defined (PIOCTLIST)
2676 proc_get_current_thread (procinfo *pi)
2678 #if 0 /* FIXME: not ready for prime time? */
2679 return pi->prstatus.pr_tid;
2686 /* Default version */
2688 proc_get_current_thread (procinfo *pi)
2696 /* Discover the IDs of all the threads within the process, and create
2697 a procinfo for each of them (chained to the parent). This
2698 unfortunately requires a different method on every OS. Returns
2699 non-zero for success, zero for failure. */
2702 proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore)
2704 if (thread && parent) /* sanity */
2706 thread->status_valid = 0;
2707 if (!proc_get_status (thread))
2708 destroy_one_procinfo (&parent->thread_list, thread);
2710 return 0; /* keep iterating */
2713 #if defined (PIOCLSTATUS)
2714 /* Solaris 2.5 (ioctl) version */
2716 proc_update_threads (procinfo *pi)
2718 gdb_prstatus_t *prstatus;
2719 struct cleanup *old_chain = NULL;
2723 /* We should never have to apply this operation to any procinfo
2724 except the one for the main process. If that ever changes for
2725 any reason, then take out the following clause and replace it
2726 with one that makes sure the ctl_fd is open. */
2729 pi = find_procinfo_or_die (pi->pid, 0);
2731 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
2733 if ((nlwp = proc_get_nthreads (pi)) <= 1)
2734 return 1; /* Process is not multi-threaded; nothing to do. */
2736 prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1));
2738 old_chain = make_cleanup (xfree, prstatus);
2739 if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0)
2740 proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__);
2742 /* Skip element zero, which represents the process as a whole. */
2743 for (i = 1; i < nlwp + 1; i++)
2745 if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL)
2746 proc_error (pi, "update_threads, create_procinfo", __LINE__);
2748 memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus));
2749 thread->status_valid = 1;
2751 pi->threads_valid = 1;
2752 do_cleanups (old_chain);
2757 /* Solaris 6 (and later) version. */
2759 do_closedir_cleanup (void *dir)
2765 proc_update_threads (procinfo *pi)
2767 char pathname[MAX_PROC_NAME_SIZE + 16];
2768 struct dirent *direntry;
2769 struct cleanup *old_chain = NULL;
2774 /* We should never have to apply this operation to any procinfo
2775 except the one for the main process. If that ever changes for
2776 any reason, then take out the following clause and replace it
2777 with one that makes sure the ctl_fd is open. */
2780 pi = find_procinfo_or_die (pi->pid, 0);
2782 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
2784 /* Note: this brute-force method was originally devised for Unixware
2785 (support removed since), and will also work on Solaris 2.6 and
2786 2.7. The original comment mentioned the existence of a much
2787 simpler and more elegant way to do this on Solaris, but didn't
2788 point out what that was. */
2790 strcpy (pathname, pi->pathname);
2791 strcat (pathname, "/lwp");
2792 if ((dirp = opendir (pathname)) == NULL)
2793 proc_error (pi, "update_threads, opendir", __LINE__);
2795 old_chain = make_cleanup (do_closedir_cleanup, dirp);
2796 while ((direntry = readdir (dirp)) != NULL)
2797 if (direntry->d_name[0] != '.') /* skip '.' and '..' */
2799 lwpid = atoi (&direntry->d_name[0]);
2800 if ((thread = create_procinfo (pi->pid, lwpid)) == NULL)
2801 proc_error (pi, "update_threads, create_procinfo", __LINE__);
2803 pi->threads_valid = 1;
2804 do_cleanups (old_chain);
2811 proc_update_threads (procinfo *pi)
2816 /* We should never have to apply this operation to any procinfo
2817 except the one for the main process. If that ever changes for
2818 any reason, then take out the following clause and replace it
2819 with one that makes sure the ctl_fd is open. */
2822 pi = find_procinfo_or_die (pi->pid, 0);
2824 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
2826 nthreads = proc_get_nthreads (pi);
2828 return 0; /* Nothing to do for 1 or fewer threads. */
2830 threads = xmalloc (nthreads * sizeof (tid_t));
2832 if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0)
2833 proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__);
2835 for (i = 0; i < nthreads; i++)
2837 if (!find_procinfo (pi->pid, threads[i]))
2838 if (!create_procinfo (pi->pid, threads[i]))
2839 proc_error (pi, "update_threads, create_procinfo", __LINE__);
2841 pi->threads_valid = 1;
2845 /* Default version */
2847 proc_update_threads (procinfo *pi)
2851 #endif /* OSF PIOCTLIST */
2852 #endif /* NEW_PROC_API */
2853 #endif /* SOL 2.5 PIOCLSTATUS */
2855 /* Given a pointer to a function, call that function once for each lwp
2856 in the procinfo list, until the function returns non-zero, in which
2857 event return the value returned by the function.
2859 Note: this function does NOT call update_threads. If you want to
2860 discover new threads first, you must call that function explicitly.
2861 This function just makes a quick pass over the currently-known
2864 PI is the parent process procinfo. FUNC is the per-thread
2865 function. PTR is an opaque parameter for function. Returns the
2866 first non-zero return value from the callee, or zero. */
2869 proc_iterate_over_threads (procinfo *pi,
2870 int (*func) (procinfo *, procinfo *, void *),
2873 procinfo *thread, *next;
2876 /* We should never have to apply this operation to any procinfo
2877 except the one for the main process. If that ever changes for
2878 any reason, then take out the following clause and replace it
2879 with one that makes sure the ctl_fd is open. */
2882 pi = find_procinfo_or_die (pi->pid, 0);
2884 for (thread = pi->thread_list; thread != NULL; thread = next)
2886 next = thread->next; /* In case thread is destroyed. */
2887 if ((retval = (*func) (pi, thread, ptr)) != 0)
2894 /* =================== END, Thread "MODULE" =================== */
2896 /* =================== END, /proc "MODULE" =================== */
2898 /* =================== GDB "MODULE" =================== */
2900 /* Here are all of the gdb target vector functions and their
2903 static ptid_t do_attach (ptid_t ptid);
2904 static void do_detach (int signo);
2905 static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum,
2906 int entry_or_exit, int mode, int from_tty);
2908 /* On mips-irix, we need to insert a breakpoint at __dbx_link during
2909 the startup phase. The following two variables are used to record
2910 the address of the breakpoint, and the code that was replaced by
2912 static int dbx_link_bpt_addr = 0;
2913 static void *dbx_link_bpt;
2915 /* Sets up the inferior to be debugged. Registers to trace signals,
2916 hardware faults, and syscalls. Note: does not set RLC flag: caller
2917 may want to customize that. Returns zero for success (note!
2918 unlike most functions in this module); on failure, returns the LINE
2919 NUMBER where it failed! */
2922 procfs_debug_inferior (procinfo *pi)
2924 fltset_t traced_faults;
2925 gdb_sigset_t traced_signals;
2926 sysset_t *traced_syscall_entries;
2927 sysset_t *traced_syscall_exits;
2930 #ifdef PROCFS_DONT_TRACE_FAULTS
2931 /* On some systems (OSF), we don't trace hardware faults.
2932 Apparently it's enough that we catch them as signals.
2933 Wonder why we don't just do that in general? */
2934 premptyset (&traced_faults); /* don't trace faults. */
2936 /* Register to trace hardware faults in the child. */
2937 prfillset (&traced_faults); /* trace all faults... */
2938 gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */
2940 if (!proc_set_traced_faults (pi, &traced_faults))
2943 /* Initially, register to trace all signals in the child. */
2944 prfillset (&traced_signals);
2945 if (!proc_set_traced_signals (pi, &traced_signals))
2949 /* Register to trace the 'exit' system call (on entry). */
2950 traced_syscall_entries = sysset_t_alloc (pi);
2951 gdb_premptysysset (traced_syscall_entries);
2953 gdb_praddsysset (traced_syscall_entries, SYS_exit);
2956 gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */
2959 gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit);
2961 #ifdef DYNAMIC_SYSCALLS
2963 int callnum = find_syscall (pi, "_exit");
2966 gdb_praddsysset (traced_syscall_entries, callnum);
2970 status = proc_set_traced_sysentry (pi, traced_syscall_entries);
2971 xfree (traced_syscall_entries);
2975 #ifdef PRFS_STOPEXEC /* defined on OSF */
2976 /* OSF method for tracing exec syscalls. Quoting:
2977 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
2978 exits from exec system calls because of the user level loader. */
2979 /* FIXME: make nice and maybe move into an access function. */
2983 if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
2986 prfs_flags |= PRFS_STOPEXEC;
2988 if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
2991 #else /* not PRFS_STOPEXEC */
2992 /* Everyone else's (except OSF) method for tracing exec syscalls. */
2994 Not all systems with /proc have all the exec* syscalls with the same
2995 names. On the SGI, for example, there is no SYS_exec, but there
2996 *is* a SYS_execv. So, we try to account for that. */
2998 traced_syscall_exits = sysset_t_alloc (pi);
2999 gdb_premptysysset (traced_syscall_exits);
3001 gdb_praddsysset (traced_syscall_exits, SYS_exec);
3004 gdb_praddsysset (traced_syscall_exits, SYS_execve);
3007 gdb_praddsysset (traced_syscall_exits, SYS_execv);
3010 #ifdef SYS_lwpcreate
3011 gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate);
3012 gdb_praddsysset (traced_syscall_exits, SYS_lwpexit);
3015 #ifdef SYS_lwp_create /* FIXME: once only, please. */
3016 gdb_praddsysset (traced_syscall_exits, SYS_lwp_create);
3017 gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit);
3020 #ifdef DYNAMIC_SYSCALLS
3022 int callnum = find_syscall (pi, "execve");
3025 gdb_praddsysset (traced_syscall_exits, callnum);
3026 callnum = find_syscall (pi, "ra_execve");
3028 gdb_praddsysset (traced_syscall_exits, callnum);
3032 status = proc_set_traced_sysexit (pi, traced_syscall_exits);
3033 xfree (traced_syscall_exits);
3037 #endif /* PRFS_STOPEXEC */
3042 procfs_attach (struct target_ops *ops, char *args, int from_tty)
3047 pid = parse_pid_to_attach (args);
3049 if (pid == getpid ())
3050 error (_("Attaching GDB to itself is not a good idea..."));
3054 exec_file = get_exec_file (0);
3057 printf_filtered (_("Attaching to program `%s', %s\n"),
3058 exec_file, target_pid_to_str (pid_to_ptid (pid)));
3060 printf_filtered (_("Attaching to %s\n"),
3061 target_pid_to_str (pid_to_ptid (pid)));
3065 inferior_ptid = do_attach (pid_to_ptid (pid));
3070 procfs_detach (struct target_ops *ops, const char *args, int from_tty)
3073 int pid = ptid_get_pid (inferior_ptid);
3082 exec_file = get_exec_file (0);
3083 if (exec_file == NULL)
3086 printf_filtered (_("Detaching from program: %s, %s\n"), exec_file,
3087 target_pid_to_str (pid_to_ptid (pid)));
3088 gdb_flush (gdb_stdout);
3093 inferior_ptid = null_ptid;
3094 detach_inferior (pid);
3095 unpush_target (ops);
3099 do_attach (ptid_t ptid)
3102 struct inferior *inf;
3106 if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL)
3107 perror (_("procfs: out of memory in 'attach'"));
3109 if (!open_procinfo_files (pi, FD_CTL))
3111 fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__);
3112 sprintf (errmsg, "do_attach: couldn't open /proc file for process %d",
3113 ptid_get_pid (ptid));
3114 dead_procinfo (pi, errmsg, NOKILL);
3117 /* Stop the process (if it isn't already stopped). */
3118 if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
3120 pi->was_stopped = 1;
3121 proc_prettyprint_why (proc_why (pi), proc_what (pi), 1);
3125 pi->was_stopped = 0;
3126 /* Set the process to run again when we close it. */
3127 if (!proc_set_run_on_last_close (pi))
3128 dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL);
3130 /* Now stop the process. */
3131 if (!proc_stop_process (pi))
3132 dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL);
3133 pi->ignore_next_sigstop = 1;
3135 /* Save some of the /proc state to be restored if we detach. */
3136 if (!proc_get_traced_faults (pi, &pi->saved_fltset))
3137 dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL);
3138 if (!proc_get_traced_signals (pi, &pi->saved_sigset))
3139 dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL);
3140 if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
3141 dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.",
3143 if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
3144 dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.",
3146 if (!proc_get_held_signals (pi, &pi->saved_sighold))
3147 dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL);
3149 if ((fail = procfs_debug_inferior (pi)) != 0)
3150 dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL);
3152 inf = current_inferior ();
3153 inferior_appeared (inf, pi->pid);
3154 /* Let GDB know that the inferior was attached. */
3155 inf->attach_flag = 1;
3157 /* Create a procinfo for the current lwp. */
3158 lwpid = proc_get_current_thread (pi);
3159 create_procinfo (pi->pid, lwpid);
3161 /* Add it to gdb's thread list. */
3162 ptid = ptid_build (pi->pid, lwpid, 0);
3169 do_detach (int signo)
3173 /* Find procinfo for the main process. */
3174 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid),
3175 0); /* FIXME: threads */
3177 if (!proc_set_current_signal (pi, signo))
3178 proc_warn (pi, "do_detach, set_current_signal", __LINE__);
3180 if (!proc_set_traced_signals (pi, &pi->saved_sigset))
3181 proc_warn (pi, "do_detach, set_traced_signal", __LINE__);
3183 if (!proc_set_traced_faults (pi, &pi->saved_fltset))
3184 proc_warn (pi, "do_detach, set_traced_faults", __LINE__);
3186 if (!proc_set_traced_sysentry (pi, pi->saved_entryset))
3187 proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__);
3189 if (!proc_set_traced_sysexit (pi, pi->saved_exitset))
3190 proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__);
3192 if (!proc_set_held_signals (pi, &pi->saved_sighold))
3193 proc_warn (pi, "do_detach, set_held_signals", __LINE__);
3195 if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)))
3196 if (signo || !(pi->was_stopped) ||
3197 query (_("Was stopped when attached, make it runnable again? ")))
3199 /* Clear any pending signal. */
3200 if (!proc_clear_current_fault (pi))
3201 proc_warn (pi, "do_detach, clear_current_fault", __LINE__);
3203 if (signo == 0 && !proc_clear_current_signal (pi))
3204 proc_warn (pi, "do_detach, clear_current_signal", __LINE__);
3206 if (!proc_set_run_on_last_close (pi))
3207 proc_warn (pi, "do_detach, set_rlc", __LINE__);
3210 destroy_procinfo (pi);
3213 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
3216 ??? Is the following note still relevant? We can't get individual
3217 registers with the PT_GETREGS ptrace(2) request either, yet we
3218 don't bother with caching at all in that case.
3220 NOTE: Since the /proc interface cannot give us individual
3221 registers, we pay no attention to REGNUM, and just fetch them all.
3222 This results in the possibility that we will do unnecessarily many
3223 fetches, since we may be called repeatedly for individual
3224 registers. So we cache the results, and mark the cache invalid
3225 when the process is resumed. */
3228 procfs_fetch_registers (struct target_ops *ops,
3229 struct regcache *regcache, int regnum)
3231 gdb_gregset_t *gregs;
3233 int pid = ptid_get_pid (inferior_ptid);
3234 int tid = ptid_get_lwp (inferior_ptid);
3235 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3237 pi = find_procinfo_or_die (pid, tid);
3240 error (_("procfs: fetch_registers failed to find procinfo for %s"),
3241 target_pid_to_str (inferior_ptid));
3243 gregs = proc_get_gregs (pi);
3245 proc_error (pi, "fetch_registers, get_gregs", __LINE__);
3247 supply_gregset (regcache, (const gdb_gregset_t *) gregs);
3249 if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
3251 gdb_fpregset_t *fpregs;
3253 if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
3254 || regnum == gdbarch_pc_regnum (gdbarch)
3255 || regnum == gdbarch_sp_regnum (gdbarch))
3256 return; /* Not a floating point register. */
3258 fpregs = proc_get_fpregs (pi);
3260 proc_error (pi, "fetch_registers, get_fpregs", __LINE__);
3262 supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs);
3266 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
3267 this for all registers.
3269 NOTE: Since the /proc interface will not read individual registers,
3270 we will cache these requests until the process is resumed, and only
3271 then write them back to the inferior process.
3273 FIXME: is that a really bad idea? Have to think about cases where
3274 writing one register might affect the value of others, etc. */
3277 procfs_store_registers (struct target_ops *ops,
3278 struct regcache *regcache, int regnum)
3280 gdb_gregset_t *gregs;
3282 int pid = ptid_get_pid (inferior_ptid);
3283 int tid = ptid_get_lwp (inferior_ptid);
3284 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3286 pi = find_procinfo_or_die (pid, tid);
3289 error (_("procfs: store_registers: failed to find procinfo for %s"),
3290 target_pid_to_str (inferior_ptid));
3292 gregs = proc_get_gregs (pi);
3294 proc_error (pi, "store_registers, get_gregs", __LINE__);
3296 fill_gregset (regcache, gregs, regnum);
3297 if (!proc_set_gregs (pi))
3298 proc_error (pi, "store_registers, set_gregs", __LINE__);
3300 if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
3302 gdb_fpregset_t *fpregs;
3304 if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
3305 || regnum == gdbarch_pc_regnum (gdbarch)
3306 || regnum == gdbarch_sp_regnum (gdbarch))
3307 return; /* Not a floating point register. */
3309 fpregs = proc_get_fpregs (pi);
3311 proc_error (pi, "store_registers, get_fpregs", __LINE__);
3313 fill_fpregset (regcache, fpregs, regnum);
3314 if (!proc_set_fpregs (pi))
3315 proc_error (pi, "store_registers, set_fpregs", __LINE__);
3320 syscall_is_lwp_exit (procinfo *pi, int scall)
3323 if (scall == SYS_lwp_exit)
3327 if (scall == SYS_lwpexit)
3334 syscall_is_exit (procinfo *pi, int scall)
3337 if (scall == SYS_exit)
3340 #ifdef DYNAMIC_SYSCALLS
3341 if (find_syscall (pi, "_exit") == scall)
3348 syscall_is_exec (procinfo *pi, int scall)
3351 if (scall == SYS_exec)
3355 if (scall == SYS_execv)
3359 if (scall == SYS_execve)
3362 #ifdef DYNAMIC_SYSCALLS
3363 if (find_syscall (pi, "_execve"))
3365 if (find_syscall (pi, "ra_execve"))
3372 syscall_is_lwp_create (procinfo *pi, int scall)
3374 #ifdef SYS_lwp_create
3375 if (scall == SYS_lwp_create)
3378 #ifdef SYS_lwpcreate
3379 if (scall == SYS_lwpcreate)
3385 /* Remove the breakpoint that we inserted in __dbx_link().
3386 Does nothing if the breakpoint hasn't been inserted or has already
3390 remove_dbx_link_breakpoint (void)
3392 if (dbx_link_bpt_addr == 0)
3395 if (deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt) != 0)
3396 warning (_("Unable to remove __dbx_link breakpoint."));
3398 dbx_link_bpt_addr = 0;
3399 dbx_link_bpt = NULL;
3403 /* Return the address of the __dbx_link() function in the file
3404 refernced by ABFD by scanning its symbol table. Return 0 if
3405 the symbol was not found. */
3408 dbx_link_addr (bfd *abfd)
3410 long storage_needed;
3411 asymbol **symbol_table;
3412 long number_of_symbols;
3415 storage_needed = bfd_get_symtab_upper_bound (abfd);
3416 if (storage_needed <= 0)
3419 symbol_table = (asymbol **) xmalloc (storage_needed);
3420 make_cleanup (xfree, symbol_table);
3422 number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
3424 for (i = 0; i < number_of_symbols; i++)
3426 asymbol *sym = symbol_table[i];
3428 if ((sym->flags & BSF_GLOBAL)
3429 && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0)
3430 return (sym->value + sym->section->vma);
3433 /* Symbol not found, return NULL. */
3437 /* Search the symbol table of the file referenced by FD for a symbol
3438 named __dbx_link(). If found, then insert a breakpoint at this location,
3439 and return nonzero. Return zero otherwise. */
3442 insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored)
3445 long storage_needed;
3448 abfd = gdb_bfd_fdopenr ("unamed", 0, fd);
3451 warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ()));
3455 if (!bfd_check_format (abfd, bfd_object))
3457 /* Not the correct format, so we can not possibly find the dbx_link
3459 gdb_bfd_unref (abfd);
3463 sym_addr = dbx_link_addr (abfd);
3466 /* Insert the breakpoint. */
3467 dbx_link_bpt_addr = sym_addr;
3468 dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch (), NULL,
3470 if (dbx_link_bpt == NULL)
3472 warning (_("Failed to insert dbx_link breakpoint."));
3473 gdb_bfd_unref (abfd);
3476 gdb_bfd_unref (abfd);
3480 gdb_bfd_unref (abfd);
3484 /* Calls the supplied callback function once for each mapped address
3485 space in the process. The callback function receives an open file
3486 descriptor for the file corresponding to that mapped address space
3487 (if there is one), and the base address of the mapped space. Quit
3488 when the callback function returns a nonzero value, or at teh end
3489 of the mappings. Returns the first non-zero return value of the
3490 callback function, or zero. */
3493 solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR),
3496 procinfo *pi = data;
3500 char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)];
3502 if (map->pr_vaddr == 0 && map->pr_size == 0)
3503 return -1; /* sanity */
3505 if (map->pr_mapname[0] == 0)
3507 fd = -1; /* no map file */
3511 sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname);
3512 /* Note: caller's responsibility to close this fd! */
3513 fd = open_with_retry (name, O_RDONLY);
3514 /* Note: we don't test the above call for failure;
3515 we just pass the FD on as given. Sometimes there is
3516 no file, so the open may return failure, but that's
3520 fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr);
3521 /* Note: we don't test the above call for failure;
3522 we just pass the FD on as given. Sometimes there is
3523 no file, so the ioctl may return failure, but that's
3526 return (*func) (fd, (CORE_ADDR) map->pr_vaddr);
3529 /* If the given memory region MAP contains a symbol named __dbx_link,
3530 insert a breakpoint at this location and return nonzero. Return
3534 insert_dbx_link_bpt_in_region (struct prmap *map,
3535 find_memory_region_ftype child_func,
3538 procinfo *pi = (procinfo *) data;
3540 /* We know the symbol we're looking for is in a text region, so
3541 only look for it if the region is a text one. */
3542 if (map->pr_mflags & MA_EXEC)
3543 return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi);
3548 /* Search all memory regions for a symbol named __dbx_link. If found,
3549 insert a breakpoint at its location, and return nonzero. Return zero
3553 insert_dbx_link_breakpoint (procinfo *pi)
3555 return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region);
3559 /* Retrieve the next stop event from the child process. If child has
3560 not stopped yet, wait for it to stop. Translate /proc eventcodes
3561 (or possibly wait eventcodes) into gdb internal event codes.
3562 Returns the id of process (and possibly thread) that incurred the
3563 event. Event codes are returned through a pointer parameter. */
3566 procfs_wait (struct target_ops *ops,
3567 ptid_t ptid, struct target_waitstatus *status, int options)
3569 /* First cut: loosely based on original version 2.1. */
3573 ptid_t retval, temp_ptid;
3574 int why, what, flags;
3581 retval = pid_to_ptid (-1);
3583 /* Find procinfo for main process. */
3584 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
3587 /* We must assume that the status is stale now... */
3588 pi->status_valid = 0;
3589 pi->gregs_valid = 0;
3590 pi->fpregs_valid = 0;
3592 #if 0 /* just try this out... */
3593 flags = proc_flags (pi);
3594 why = proc_why (pi);
3595 if ((flags & PR_STOPPED) && (why == PR_REQUESTED))
3596 pi->status_valid = 0; /* re-read again, IMMEDIATELY... */
3598 /* If child is not stopped, wait for it to stop. */
3599 if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) &&
3600 !proc_wait_for_stop (pi))
3602 /* wait_for_stop failed: has the child terminated? */
3603 if (errno == ENOENT)
3607 /* /proc file not found; presumably child has terminated. */
3608 wait_retval = wait (&wstat); /* "wait" for the child's exit. */
3611 if (wait_retval != ptid_get_pid (inferior_ptid))
3612 error (_("procfs: couldn't stop "
3613 "process %d: wait returned %d."),
3614 ptid_get_pid (inferior_ptid), wait_retval);
3615 /* FIXME: might I not just use waitpid?
3616 Or try find_procinfo to see if I know about this child? */
3617 retval = pid_to_ptid (wait_retval);
3619 else if (errno == EINTR)
3623 /* Unknown error from wait_for_stop. */
3624 proc_error (pi, "target_wait (wait_for_stop)", __LINE__);
3629 /* This long block is reached if either:
3630 a) the child was already stopped, or
3631 b) we successfully waited for the child with wait_for_stop.
3632 This block will analyze the /proc status, and translate it
3633 into a waitstatus for GDB.
3635 If we actually had to call wait because the /proc file
3636 is gone (child terminated), then we skip this block,
3637 because we already have a waitstatus. */
3639 flags = proc_flags (pi);
3640 why = proc_why (pi);
3641 what = proc_what (pi);
3643 if (flags & (PR_STOPPED | PR_ISTOP))
3646 /* If it's running async (for single_thread control),
3647 set it back to normal again. */
3648 if (flags & PR_ASYNC)
3649 if (!proc_unset_async (pi))
3650 proc_error (pi, "target_wait, unset_async", __LINE__);
3654 proc_prettyprint_why (why, what, 1);
3656 /* The 'pid' we will return to GDB is composed of
3657 the process ID plus the lwp ID. */
3658 retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0);
3662 wstat = (what << 8) | 0177;
3665 if (syscall_is_lwp_exit (pi, what))
3667 if (print_thread_events)
3668 printf_unfiltered (_("[%s exited]\n"),
3669 target_pid_to_str (retval));
3670 delete_thread (retval);
3671 status->kind = TARGET_WAITKIND_SPURIOUS;
3674 else if (syscall_is_exit (pi, what))
3676 struct inferior *inf;
3678 /* Handle SYS_exit call only. */
3679 /* Stopped at entry to SYS_exit.
3680 Make it runnable, resume it, then use
3681 the wait system call to get its exit code.
3682 Proc_run_process always clears the current
3684 Then return its exit status. */
3685 pi->status_valid = 0;
3687 /* FIXME: what we should do is return
3688 TARGET_WAITKIND_SPURIOUS. */
3689 if (!proc_run_process (pi, 0, 0))
3690 proc_error (pi, "target_wait, run_process", __LINE__);
3692 inf = find_inferior_pid (pi->pid);
3693 if (inf->attach_flag)
3695 /* Don't call wait: simulate waiting for exit,
3696 return a "success" exit code. Bogus: what if
3697 it returns something else? */
3699 retval = inferior_ptid; /* ? ? ? */
3703 int temp = wait (&wstat);
3705 /* FIXME: shouldn't I make sure I get the right
3706 event from the right process? If (for
3707 instance) I have killed an earlier inferior
3708 process but failed to clean up after it
3709 somehow, I could get its termination event
3712 /* If wait returns -1, that's what we return
3715 retval = pid_to_ptid (temp);
3720 printf_filtered (_("procfs: trapped on entry to "));
3721 proc_prettyprint_syscall (proc_what (pi), 0);
3722 printf_filtered ("\n");
3725 long i, nsysargs, *sysargs;
3727 if ((nsysargs = proc_nsysarg (pi)) > 0 &&
3728 (sysargs = proc_sysargs (pi)) != NULL)
3730 printf_filtered (_("%ld syscall arguments:\n"),
3732 for (i = 0; i < nsysargs; i++)
3733 printf_filtered ("#%ld: 0x%08lx\n",
3741 /* How to exit gracefully, returning "unknown
3743 status->kind = TARGET_WAITKIND_SPURIOUS;
3744 return inferior_ptid;
3748 /* How to keep going without returning to wfi: */
3749 target_resume (ptid, 0, GDB_SIGNAL_0);
3755 if (syscall_is_exec (pi, what))
3757 /* Hopefully this is our own "fork-child" execing
3758 the real child. Hoax this event into a trap, and
3759 GDB will see the child about to execute its start
3761 wstat = (SIGTRAP << 8) | 0177;
3764 else if (what == SYS_syssgi)
3766 /* see if we can break on dbx_link(). If yes, then
3767 we no longer need the SYS_syssgi notifications. */
3768 if (insert_dbx_link_breakpoint (pi))
3769 proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT,
3772 /* This is an internal event and should be transparent
3773 to wfi, so resume the execution and wait again. See
3774 comment in procfs_init_inferior() for more details. */
3775 target_resume (ptid, 0, GDB_SIGNAL_0);
3779 else if (syscall_is_lwp_create (pi, what))
3781 /* This syscall is somewhat like fork/exec. We
3782 will get the event twice: once for the parent
3783 LWP, and once for the child. We should already
3784 know about the parent LWP, but the child will
3785 be new to us. So, whenever we get this event,
3786 if it represents a new thread, simply add the
3787 thread to the list. */
3789 /* If not in procinfo list, add it. */
3790 temp_tid = proc_get_current_thread (pi);
3791 if (!find_procinfo (pi->pid, temp_tid))
3792 create_procinfo (pi->pid, temp_tid);
3794 temp_ptid = ptid_build (pi->pid, temp_tid, 0);
3795 /* If not in GDB's thread list, add it. */
3796 if (!in_thread_list (temp_ptid))
3797 add_thread (temp_ptid);
3799 /* Return to WFI, but tell it to immediately resume. */
3800 status->kind = TARGET_WAITKIND_SPURIOUS;
3801 return inferior_ptid;
3803 else if (syscall_is_lwp_exit (pi, what))
3805 if (print_thread_events)
3806 printf_unfiltered (_("[%s exited]\n"),
3807 target_pid_to_str (retval));
3808 delete_thread (retval);
3809 status->kind = TARGET_WAITKIND_SPURIOUS;
3814 /* FIXME: Do we need to handle SYS_sproc,
3815 SYS_fork, or SYS_vfork here? The old procfs
3816 seemed to use this event to handle threads on
3817 older (non-LWP) systems, where I'm assuming
3818 that threads were actually separate processes.
3819 Irix, maybe? Anyway, low priority for now. */
3823 printf_filtered (_("procfs: trapped on exit from "));
3824 proc_prettyprint_syscall (proc_what (pi), 0);
3825 printf_filtered ("\n");
3828 long i, nsysargs, *sysargs;
3830 if ((nsysargs = proc_nsysarg (pi)) > 0 &&
3831 (sysargs = proc_sysargs (pi)) != NULL)
3833 printf_filtered (_("%ld syscall arguments:\n"),
3835 for (i = 0; i < nsysargs; i++)
3836 printf_filtered ("#%ld: 0x%08lx\n",
3841 status->kind = TARGET_WAITKIND_SPURIOUS;
3842 return inferior_ptid;
3847 wstat = (SIGSTOP << 8) | 0177;
3852 printf_filtered (_("Retry #%d:\n"), retry);
3853 pi->status_valid = 0;
3858 /* If not in procinfo list, add it. */
3859 temp_tid = proc_get_current_thread (pi);
3860 if (!find_procinfo (pi->pid, temp_tid))
3861 create_procinfo (pi->pid, temp_tid);
3863 /* If not in GDB's thread list, add it. */
3864 temp_ptid = ptid_build (pi->pid, temp_tid, 0);
3865 if (!in_thread_list (temp_ptid))
3866 add_thread (temp_ptid);
3868 status->kind = TARGET_WAITKIND_STOPPED;
3869 status->value.sig = 0;
3874 wstat = (what << 8) | 0177;
3880 wstat = (SIGTRAP << 8) | 0177;
3885 wstat = (SIGTRAP << 8) | 0177;
3888 /* FIXME: use si_signo where possible. */
3890 #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */
3893 wstat = (SIGILL << 8) | 0177;
3896 #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */
3899 /* If we hit our __dbx_link() internal breakpoint,
3900 then remove it. See comments in procfs_init_inferior()
3901 for more details. */
3902 if (dbx_link_bpt_addr != 0
3903 && dbx_link_bpt_addr
3904 == regcache_read_pc (get_current_regcache ()))
3905 remove_dbx_link_breakpoint ();
3907 wstat = (SIGTRAP << 8) | 0177;
3911 #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */
3914 wstat = (SIGSEGV << 8) | 0177;
3918 #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */
3921 wstat = (SIGFPE << 8) | 0177;
3923 case FLTPAGE: /* Recoverable page fault */
3924 default: /* FIXME: use si_signo if possible for
3926 retval = pid_to_ptid (-1);
3927 printf_filtered ("procfs:%d -- ", __LINE__);
3928 printf_filtered (_("child stopped for unknown reason:\n"));
3929 proc_prettyprint_why (why, what, 1);
3930 error (_("... giving up..."));
3933 break; /* case PR_FAULTED: */
3934 default: /* switch (why) unmatched */
3935 printf_filtered ("procfs:%d -- ", __LINE__);
3936 printf_filtered (_("child stopped for unknown reason:\n"));
3937 proc_prettyprint_why (why, what, 1);
3938 error (_("... giving up..."));
3941 /* Got this far without error: If retval isn't in the
3942 threads database, add it. */
3943 if (ptid_get_pid (retval) > 0 &&
3944 !ptid_equal (retval, inferior_ptid) &&
3945 !in_thread_list (retval))
3947 /* We have a new thread. We need to add it both to
3948 GDB's list and to our own. If we don't create a
3949 procinfo, resume may be unhappy later. */
3950 add_thread (retval);
3951 if (find_procinfo (ptid_get_pid (retval),
3952 ptid_get_lwp (retval)) == NULL)
3953 create_procinfo (ptid_get_pid (retval),
3954 ptid_get_lwp (retval));
3957 else /* Flags do not indicate STOPPED. */
3959 /* surely this can't happen... */
3960 printf_filtered ("procfs:%d -- process not stopped.\n",
3962 proc_prettyprint_flags (flags, 1);
3963 error (_("procfs: ...giving up..."));
3968 store_waitstatus (status, wstat);
3974 /* Perform a partial transfer to/from the specified object. For
3975 memory transfers, fall back to the old memory xfer functions. */
3977 static enum target_xfer_status
3978 procfs_xfer_partial (struct target_ops *ops, enum target_object object,
3979 const char *annex, gdb_byte *readbuf,
3980 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
3981 ULONGEST *xfered_len)
3985 case TARGET_OBJECT_MEMORY:
3987 return (*ops->deprecated_xfer_memory) (offset, readbuf,
3988 len, 0/*read*/, NULL, ops);
3990 return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf,
3991 len, 1/*write*/, NULL, ops);
3992 return TARGET_XFER_E_IO;
3995 case TARGET_OBJECT_AUXV:
3996 return memory_xfer_auxv (ops, object, annex, readbuf, writebuf,
3997 offset, len, xfered_len);
4001 if (ops->beneath != NULL)
4002 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
4003 readbuf, writebuf, offset, len,
4005 return TARGET_XFER_E_IO;
4010 /* Transfer LEN bytes between GDB address MYADDR and target address
4011 MEMADDR. If DOWRITE is non-zero, transfer them to the target,
4012 otherwise transfer them from the target. TARGET is unused.
4014 The return value is 0 if an error occurred or no bytes were
4015 transferred. Otherwise, it will be a positive value which
4016 indicates the number of bytes transferred between gdb and the
4017 target. (Note that the interface also makes provisions for
4018 negative values, but this capability isn't implemented here.) */
4021 procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite,
4022 struct mem_attrib *attrib, struct target_ops *target)
4027 /* Find procinfo for main process. */
4028 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4029 if (pi->as_fd == 0 &&
4030 open_procinfo_files (pi, FD_AS) == 0)
4032 proc_warn (pi, "xfer_memory, open_proc_files", __LINE__);
4036 if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
4041 PROCFS_NOTE ("write memory:\n");
4043 PROCFS_NOTE ("write memory:\n");
4045 nbytes = write (pi->as_fd, myaddr, len);
4049 PROCFS_NOTE ("read memory:\n");
4050 nbytes = read (pi->as_fd, myaddr, len);
4060 /* Called by target_resume before making child runnable. Mark cached
4061 registers and status's invalid. If there are "dirty" caches that
4062 need to be written back to the child process, do that.
4064 File descriptors are also cached. As they are a limited resource,
4065 we cannot hold onto them indefinitely. However, as they are
4066 expensive to open, we don't want to throw them away
4067 indescriminately either. As a compromise, we will keep the file
4068 descriptors for the parent process, but discard any file
4069 descriptors we may have accumulated for the threads.
4071 As this function is called by iterate_over_threads, it always
4072 returns zero (so that iterate_over_threads will keep
4076 invalidate_cache (procinfo *parent, procinfo *pi, void *ptr)
4078 /* About to run the child; invalidate caches and do any other
4082 if (pi->gregs_dirty)
4083 if (parent == NULL ||
4084 proc_get_current_thread (parent) != pi->tid)
4085 if (!proc_set_gregs (pi)) /* flush gregs cache */
4086 proc_warn (pi, "target_resume, set_gregs",
4088 if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0)
4089 if (pi->fpregs_dirty)
4090 if (parent == NULL ||
4091 proc_get_current_thread (parent) != pi->tid)
4092 if (!proc_set_fpregs (pi)) /* flush fpregs cache */
4093 proc_warn (pi, "target_resume, set_fpregs",
4099 /* The presence of a parent indicates that this is an LWP.
4100 Close any file descriptors that it might have open.
4101 We don't do this to the master (parent) procinfo. */
4103 close_procinfo_files (pi);
4105 pi->gregs_valid = 0;
4106 pi->fpregs_valid = 0;
4108 pi->gregs_dirty = 0;
4109 pi->fpregs_dirty = 0;
4111 pi->status_valid = 0;
4112 pi->threads_valid = 0;
4118 /* A callback function for iterate_over_threads. Find the
4119 asynchronous signal thread, and make it runnable. See if that
4120 helps matters any. */
4123 make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr)
4126 if (proc_flags (pi) & PR_ASLWP)
4128 if (!proc_run_process (pi, 0, -1))
4129 proc_error (pi, "make_signal_thread_runnable", __LINE__);
4137 /* Make the child process runnable. Normally we will then call
4138 procfs_wait and wait for it to stop again (unless gdb is async).
4140 If STEP is true, then arrange for the child to stop again after
4141 executing a single instruction. If SIGNO is zero, then cancel any
4142 pending signal; if non-zero, then arrange for the indicated signal
4143 to be delivered to the child when it runs. If PID is -1, then
4144 allow any child thread to run; if non-zero, then allow only the
4145 indicated thread to run. (not implemented yet). */
4148 procfs_resume (struct target_ops *ops,
4149 ptid_t ptid, int step, enum gdb_signal signo)
4151 procinfo *pi, *thread;
4155 prrun.prflags |= PRSVADDR;
4156 prrun.pr_vaddr = $PC; set resume address
4157 prrun.prflags |= PRSTRACE; trace signals in pr_trace (all)
4158 prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE)
4159 prrun.prflags |= PRCFAULT; clear current fault.
4161 PRSTRACE and PRSFAULT can be done by other means
4162 (proc_trace_signals, proc_trace_faults)
4163 PRSVADDR is unnecessary.
4164 PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault)
4165 This basically leaves PRSTEP and PRCSIG.
4166 PRCSIG is like PIOCSSIG (proc_clear_current_signal).
4167 So basically PR_STEP is the sole argument that must be passed
4168 to proc_run_process (for use in the prrun struct by ioctl). */
4170 /* Find procinfo for main process. */
4171 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4173 /* First cut: ignore pid argument. */
4176 /* Convert signal to host numbering. */
4178 (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop))
4181 native_signo = gdb_signal_to_host (signo);
4183 pi->ignore_next_sigstop = 0;
4185 /* Running the process voids all cached registers and status. */
4186 /* Void the threads' caches first. */
4187 proc_iterate_over_threads (pi, invalidate_cache, NULL);
4188 /* Void the process procinfo's caches. */
4189 invalidate_cache (NULL, pi, NULL);
4191 if (ptid_get_pid (ptid) != -1)
4193 /* Resume a specific thread, presumably suppressing the
4195 thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid));
4198 if (thread->tid != 0)
4200 /* We're to resume a specific thread, and not the
4201 others. Set the child process's PR_ASYNC flag. */
4203 if (!proc_set_async (pi))
4204 proc_error (pi, "target_resume, set_async", __LINE__);
4207 proc_iterate_over_threads (pi,
4208 make_signal_thread_runnable,
4211 pi = thread; /* Substitute the thread's procinfo
4217 if (!proc_run_process (pi, step, native_signo))
4220 warning (_("resume: target already running. "
4221 "Pretend to resume, and hope for the best!"));
4223 proc_error (pi, "target_resume", __LINE__);
4227 /* Set up to trace signals in the child process. */
4230 procfs_pass_signals (int numsigs, unsigned char *pass_signals)
4232 gdb_sigset_t signals;
4233 procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4236 prfillset (&signals);
4238 for (signo = 0; signo < NSIG; signo++)
4240 int target_signo = gdb_signal_from_host (signo);
4241 if (target_signo < numsigs && pass_signals[target_signo])
4242 gdb_prdelset (&signals, signo);
4245 if (!proc_set_traced_signals (pi, &signals))
4246 proc_error (pi, "pass_signals", __LINE__);
4249 /* Print status information about the child process. */
4252 procfs_files_info (struct target_ops *ignore)
4254 struct inferior *inf = current_inferior ();
4256 printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"),
4257 inf->attach_flag? "attached": "child",
4258 target_pid_to_str (inferior_ptid));
4261 /* Stop the child process asynchronously, as when the gdb user types
4262 control-c or presses a "stop" button. Works by sending
4263 kill(SIGINT) to the child's process group. */
4266 procfs_stop (ptid_t ptid)
4268 kill (-inferior_process_group (), SIGINT);
4271 /* Make it die. Wait for it to die. Clean up after it. Note: this
4272 should only be applied to the real process, not to an LWP, because
4273 of the check for parent-process. If we need this to work for an
4274 LWP, it needs some more logic. */
4277 unconditionally_kill_inferior (procinfo *pi)
4281 parent_pid = proc_parent_pid (pi);
4282 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
4283 /* FIXME: use access functions. */
4284 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
4285 before the PIOCKILL, otherwise it might generate a corrupted core
4286 file for the inferior. */
4287 if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0)
4289 printf_filtered ("unconditionally_kill: SSIG failed!\n");
4292 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
4293 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
4294 to kill the inferior, otherwise it might remain stopped with a
4296 We do not check the result of the PIOCSSIG, the inferior might have
4299 gdb_siginfo_t newsiginfo;
4301 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
4302 newsiginfo.si_signo = SIGKILL;
4303 newsiginfo.si_code = 0;
4304 newsiginfo.si_errno = 0;
4305 newsiginfo.si_pid = getpid ();
4306 newsiginfo.si_uid = getuid ();
4307 /* FIXME: use proc_set_current_signal. */
4308 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
4310 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4311 if (!proc_kill (pi, SIGKILL))
4312 proc_error (pi, "unconditionally_kill, proc_kill", __LINE__);
4313 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4314 destroy_procinfo (pi);
4316 /* If pi is GDB's child, wait for it to die. */
4317 if (parent_pid == getpid ())
4318 /* FIXME: should we use waitpid to make sure we get the right event?
4319 Should we check the returned event? */
4324 ret = waitpid (pi->pid, &status, 0);
4331 /* We're done debugging it, and we want it to go away. Then we want
4332 GDB to forget all about it. */
4335 procfs_kill_inferior (struct target_ops *ops)
4337 if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */
4339 /* Find procinfo for main process. */
4340 procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0);
4343 unconditionally_kill_inferior (pi);
4344 target_mourn_inferior ();
4348 /* Forget we ever debugged this thing! */
4351 procfs_mourn_inferior (struct target_ops *ops)
4355 if (!ptid_equal (inferior_ptid, null_ptid))
4357 /* Find procinfo for main process. */
4358 pi = find_procinfo (ptid_get_pid (inferior_ptid), 0);
4360 destroy_procinfo (pi);
4362 unpush_target (ops);
4364 if (dbx_link_bpt != NULL)
4366 deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt);
4367 dbx_link_bpt_addr = 0;
4368 dbx_link_bpt = NULL;
4371 generic_mourn_inferior ();
4374 /* When GDB forks to create a runnable inferior process, this function
4375 is called on the parent side of the fork. It's job is to do
4376 whatever is necessary to make the child ready to be debugged, and
4377 then wait for the child to synchronize. */
4380 procfs_init_inferior (struct target_ops *ops, int pid)
4383 gdb_sigset_t signals;
4387 /* This routine called on the parent side (GDB side)
4388 after GDB forks the inferior. */
4391 if ((pi = create_procinfo (pid, 0)) == NULL)
4392 perror (_("procfs: out of memory in 'init_inferior'"));
4394 if (!open_procinfo_files (pi, FD_CTL))
4395 proc_error (pi, "init_inferior, open_proc_files", __LINE__);
4399 open_procinfo_files // done
4402 procfs_notice_signals
4409 /* If not stopped yet, wait for it to stop. */
4410 if (!(proc_flags (pi) & PR_STOPPED) &&
4411 !(proc_wait_for_stop (pi)))
4412 dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL);
4414 /* Save some of the /proc state to be restored if we detach. */
4415 /* FIXME: Why? In case another debugger was debugging it?
4416 We're it's parent, for Ghu's sake! */
4417 if (!proc_get_traced_signals (pi, &pi->saved_sigset))
4418 proc_error (pi, "init_inferior, get_traced_signals", __LINE__);
4419 if (!proc_get_held_signals (pi, &pi->saved_sighold))
4420 proc_error (pi, "init_inferior, get_held_signals", __LINE__);
4421 if (!proc_get_traced_faults (pi, &pi->saved_fltset))
4422 proc_error (pi, "init_inferior, get_traced_faults", __LINE__);
4423 if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
4424 proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__);
4425 if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
4426 proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__);
4428 if ((fail = procfs_debug_inferior (pi)) != 0)
4429 proc_error (pi, "init_inferior (procfs_debug_inferior)", fail);
4431 /* FIXME: logically, we should really be turning OFF run-on-last-close,
4432 and possibly even turning ON kill-on-last-close at this point. But
4433 I can't make that change without careful testing which I don't have
4434 time to do right now... */
4435 /* Turn on run-on-last-close flag so that the child
4436 will die if GDB goes away for some reason. */
4437 if (!proc_set_run_on_last_close (pi))
4438 proc_error (pi, "init_inferior, set_RLC", __LINE__);
4440 /* We now have have access to the lwpid of the main thread/lwp. */
4441 lwpid = proc_get_current_thread (pi);
4443 /* Create a procinfo for the main lwp. */
4444 create_procinfo (pid, lwpid);
4446 /* We already have a main thread registered in the thread table at
4447 this point, but it didn't have any lwp info yet. Notify the core
4448 about it. This changes inferior_ptid as well. */
4449 thread_change_ptid (pid_to_ptid (pid),
4450 ptid_build (pid, lwpid, 0));
4452 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
4455 /* On mips-irix, we need to stop the inferior early enough during
4456 the startup phase in order to be able to load the shared library
4457 symbols and insert the breakpoints that are located in these shared
4458 libraries. Stopping at the program entry point is not good enough
4459 because the -init code is executed before the execution reaches
4462 So what we need to do is to insert a breakpoint in the runtime
4463 loader (rld), more precisely in __dbx_link(). This procedure is
4464 called by rld once all shared libraries have been mapped, but before
4465 the -init code is executed. Unfortuantely, this is not straightforward,
4466 as rld is not part of the executable we are running, and thus we need
4467 the inferior to run until rld itself has been mapped in memory.
4469 For this, we trace all syssgi() syscall exit events. Each time
4470 we detect such an event, we iterate over each text memory maps,
4471 get its associated fd, and scan the symbol table for __dbx_link().
4472 When found, we know that rld has been mapped, and that we can insert
4473 the breakpoint at the symbol address. Once the dbx_link() breakpoint
4474 has been inserted, the syssgi() notifications are no longer necessary,
4475 so they should be canceled. */
4476 proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0);
4480 /* When GDB forks to create a new process, this function is called on
4481 the child side of the fork before GDB exec's the user program. Its
4482 job is to make the child minimally debuggable, so that the parent
4483 GDB process can connect to the child and take over. This function
4484 should do only the minimum to make that possible, and to
4485 synchronize with the parent process. The parent process should
4486 take care of the details. */
4489 procfs_set_exec_trap (void)
4491 /* This routine called on the child side (inferior side)
4492 after GDB forks the inferior. It must use only local variables,
4493 because it may be sharing data space with its parent. */
4498 if ((pi = create_procinfo (getpid (), 0)) == NULL)
4499 perror_with_name (_("procfs: create_procinfo failed in child."));
4501 if (open_procinfo_files (pi, FD_CTL) == 0)
4503 proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__);
4504 gdb_flush (gdb_stderr);
4505 /* No need to call "dead_procinfo", because we're going to
4510 #ifdef PRFS_STOPEXEC /* defined on OSF */
4511 /* OSF method for tracing exec syscalls. Quoting:
4512 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
4513 exits from exec system calls because of the user level loader. */
4514 /* FIXME: make nice and maybe move into an access function. */
4518 if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
4520 proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__);
4521 gdb_flush (gdb_stderr);
4524 prfs_flags |= PRFS_STOPEXEC;
4526 if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
4528 proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__);
4529 gdb_flush (gdb_stderr);
4533 #else /* not PRFS_STOPEXEC */
4534 /* Everyone else's (except OSF) method for tracing exec syscalls. */
4536 Not all systems with /proc have all the exec* syscalls with the same
4537 names. On the SGI, for example, there is no SYS_exec, but there
4538 *is* a SYS_execv. So, we try to account for that. */
4540 exitset = sysset_t_alloc (pi);
4541 gdb_premptysysset (exitset);
4543 gdb_praddsysset (exitset, SYS_exec);
4546 gdb_praddsysset (exitset, SYS_execve);
4549 gdb_praddsysset (exitset, SYS_execv);
4551 #ifdef DYNAMIC_SYSCALLS
4553 int callnum = find_syscall (pi, "execve");
4556 gdb_praddsysset (exitset, callnum);
4558 callnum = find_syscall (pi, "ra_execve");
4560 gdb_praddsysset (exitset, callnum);
4562 #endif /* DYNAMIC_SYSCALLS */
4564 if (!proc_set_traced_sysexit (pi, exitset))
4566 proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__);
4567 gdb_flush (gdb_stderr);
4570 #endif /* PRFS_STOPEXEC */
4572 /* FIXME: should this be done in the parent instead? */
4573 /* Turn off inherit on fork flag so that all grand-children
4574 of gdb start with tracing flags cleared. */
4575 if (!proc_unset_inherit_on_fork (pi))
4576 proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__);
4578 /* Turn off run on last close flag, so that the child process
4579 cannot run away just because we close our handle on it.
4580 We want it to wait for the parent to attach. */
4581 if (!proc_unset_run_on_last_close (pi))
4582 proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__);
4584 /* FIXME: No need to destroy the procinfo --
4585 we have our own address space, and we're about to do an exec! */
4586 /*destroy_procinfo (pi);*/
4589 /* This function is called BEFORE gdb forks the inferior process. Its
4590 only real responsibility is to set things up for the fork, and tell
4591 GDB which two functions to call after the fork (one for the parent,
4592 and one for the child).
4594 This function does a complicated search for a unix shell program,
4595 which it then uses to parse arguments and environment variables to
4596 be sent to the child. I wonder whether this code could not be
4597 abstracted out and shared with other unix targets such as
4601 procfs_create_inferior (struct target_ops *ops, char *exec_file,
4602 char *allargs, char **env, int from_tty)
4604 char *shell_file = getenv ("SHELL");
4608 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
4611 /* We will be looking down the PATH to find shell_file. If we
4612 just do this the normal way (via execlp, which operates by
4613 attempting an exec for each element of the PATH until it
4614 finds one which succeeds), then there will be an exec for
4615 each failed attempt, each of which will cause a PR_SYSEXIT
4616 stop, and we won't know how to distinguish the PR_SYSEXIT's
4617 for these failed execs with the ones for successful execs
4618 (whether the exec has succeeded is stored at that time in the
4619 carry bit or some such architecture-specific and
4620 non-ABI-specified place).
4622 So I can't think of anything better than to search the PATH
4623 now. This has several disadvantages: (1) There is a race
4624 condition; if we find a file now and it is deleted before we
4625 exec it, we lose, even if the deletion leaves a valid file
4626 further down in the PATH, (2) there is no way to know exactly
4627 what an executable (in the sense of "capable of being
4628 exec'd") file is. Using access() loses because it may lose
4629 if the caller is the superuser; failing to use it loses if
4630 there are ACLs or some such. */
4634 /* FIXME-maybe: might want "set path" command so user can change what
4635 path is used from within GDB. */
4636 char *path = getenv ("PATH");
4638 struct stat statbuf;
4641 path = "/bin:/usr/bin";
4643 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
4644 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
4646 p1 = strchr (p, ':');
4651 strncpy (tryname, p, len);
4652 tryname[len] = '\0';
4653 strcat (tryname, "/");
4654 strcat (tryname, shell_file);
4655 if (access (tryname, X_OK) < 0)
4657 if (stat (tryname, &statbuf) < 0)
4659 if (!S_ISREG (statbuf.st_mode))
4660 /* We certainly need to reject directories. I'm not quite
4661 as sure about FIFOs, sockets, etc., but I kind of doubt
4662 that people want to exec() these things. */
4667 /* Not found. This must be an error rather than merely passing
4668 the file to execlp(), because execlp() would try all the
4669 exec()s, causing GDB to get confused. */
4670 error (_("procfs:%d -- Can't find shell %s in PATH"),
4671 __LINE__, shell_file);
4673 shell_file = tryname;
4676 pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap,
4677 NULL, NULL, shell_file, NULL);
4679 procfs_init_inferior (ops, pid);
4682 /* An observer for the "inferior_created" event. */
4685 procfs_inferior_created (struct target_ops *ops, int from_tty)
4688 /* Make sure to cancel the syssgi() syscall-exit notifications.
4689 They should normally have been removed by now, but they may still
4690 be activated if the inferior doesn't use shared libraries, or if
4691 we didn't locate __dbx_link, or if we never stopped in __dbx_link.
4692 See procfs_init_inferior() for more details.
4694 Since these notifications are only ever enabled when we spawned
4695 the inferior ourselves, there is nothing to do when the inferior
4696 was created by attaching to an already running process, or when
4697 debugging a core file. */
4698 if (current_inferior ()->attach_flag || !target_can_run (¤t_target))
4701 proc_trace_syscalls_1 (find_procinfo_or_die (ptid_get_pid (inferior_ptid),
4702 0), SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0);
4706 /* Callback for find_new_threads. Calls "add_thread". */
4709 procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr)
4711 ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0);
4713 if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid))
4714 add_thread (gdb_threadid);
4719 /* Query all the threads that the target knows about, and give them
4720 back to GDB to add to its list. */
4723 procfs_find_new_threads (struct target_ops *ops)
4727 /* Find procinfo for main process. */
4728 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4729 proc_update_threads (pi);
4730 proc_iterate_over_threads (pi, procfs_notice_thread, NULL);
4733 /* Return true if the thread is still 'alive'. This guy doesn't
4734 really seem to be doing his job. Got to investigate how to tell
4735 when a thread is really gone. */
4738 procfs_thread_alive (struct target_ops *ops, ptid_t ptid)
4743 proc = ptid_get_pid (ptid);
4744 thread = ptid_get_lwp (ptid);
4745 /* If I don't know it, it ain't alive! */
4746 if ((pi = find_procinfo (proc, thread)) == NULL)
4749 /* If I can't get its status, it ain't alive!
4750 What's more, I need to forget about it! */
4751 if (!proc_get_status (pi))
4753 destroy_procinfo (pi);
4756 /* I couldn't have got its status if it weren't alive, so it's
4761 /* Convert PTID to a string. Returns the string in a static
4765 procfs_pid_to_str (struct target_ops *ops, ptid_t ptid)
4767 static char buf[80];
4769 if (ptid_get_lwp (ptid) == 0)
4770 sprintf (buf, "process %d", ptid_get_pid (ptid));
4772 sprintf (buf, "LWP %ld", ptid_get_lwp (ptid));
4777 /* Insert a watchpoint. */
4780 procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag,
4787 pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ?
4788 ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid),
4791 /* Translate from GDB's flags to /proc's. */
4792 if (len > 0) /* len == 0 means delete watchpoint. */
4794 switch (rwflag) { /* FIXME: need an enum! */
4795 case hw_write: /* default watchpoint (write) */
4796 pflags = WRITE_WATCHFLAG;
4798 case hw_read: /* read watchpoint */
4799 pflags = READ_WATCHFLAG;
4801 case hw_access: /* access watchpoint */
4802 pflags = READ_WATCHFLAG | WRITE_WATCHFLAG;
4804 case hw_execute: /* execution HW breakpoint */
4805 pflags = EXEC_WATCHFLAG;
4807 default: /* Something weird. Return error. */
4810 if (after) /* Stop after r/w access is completed. */
4811 pflags |= AFTER_WATCHFLAG;
4814 if (!proc_set_watchpoint (pi, addr, len, pflags))
4816 if (errno == E2BIG) /* Typical error for no resources. */
4817 return -1; /* fail */
4818 /* GDB may try to remove the same watchpoint twice.
4819 If a remove request returns no match, don't error. */
4820 if (errno == ESRCH && len == 0)
4821 return 0; /* ignore */
4822 proc_error (pi, "set_watchpoint", __LINE__);
4828 /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE
4829 is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint,
4830 or bp_hardware_watchpoint. CNT is the number of watchpoints used so
4833 Note: procfs_can_use_hw_breakpoint() is not yet used by all
4834 procfs.c targets due to the fact that some of them still define
4835 target_can_use_hardware_watchpoint. */
4838 procfs_can_use_hw_breakpoint (struct target_ops *self,
4839 int type, int cnt, int othertype)
4841 /* Due to the way that proc_set_watchpoint() is implemented, host
4842 and target pointers must be of the same size. If they are not,
4843 we can't use hardware watchpoints. This limitation is due to the
4844 fact that proc_set_watchpoint() calls
4845 procfs_address_to_host_pointer(); a close inspection of
4846 procfs_address_to_host_pointer will reveal that an internal error
4847 will be generated when the host and target pointer sizes are
4849 struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
4851 if (sizeof (void *) != TYPE_LENGTH (ptr_type))
4854 /* Other tests here??? */
4859 /* Returns non-zero if process is stopped on a hardware watchpoint
4860 fault, else returns zero. */
4863 procfs_stopped_by_watchpoint (struct target_ops *ops)
4867 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4869 if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
4871 if (proc_why (pi) == PR_FAULTED)
4874 if (proc_what (pi) == FLTWATCH)
4878 if (proc_what (pi) == FLTKWATCH)
4886 /* Returns 1 if the OS knows the position of the triggered watchpoint,
4887 and sets *ADDR to that address. Returns 0 if OS cannot report that
4888 address. This function is only called if
4889 procfs_stopped_by_watchpoint returned 1, thus no further checks are
4890 done. The function also assumes that ADDR is not NULL. */
4893 procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr)
4897 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
4898 return proc_watchpoint_address (pi, addr);
4902 procfs_insert_watchpoint (struct target_ops *self,
4903 CORE_ADDR addr, int len, int type,
4904 struct expression *cond)
4906 if (!target_have_steppable_watchpoint
4907 && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ()))
4909 /* When a hardware watchpoint fires off the PC will be left at
4910 the instruction following the one which caused the
4911 watchpoint. It will *NOT* be necessary for GDB to step over
4913 return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1);
4917 /* When a hardware watchpoint fires off the PC will be left at
4918 the instruction which caused the watchpoint. It will be
4919 necessary for GDB to step over the watchpoint. */
4920 return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0);
4925 procfs_remove_watchpoint (struct target_ops *self,
4926 CORE_ADDR addr, int len, int type,
4927 struct expression *cond)
4929 return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0);
4933 procfs_region_ok_for_hw_watchpoint (struct target_ops *self,
4934 CORE_ADDR addr, int len)
4936 /* The man page for proc(4) on Solaris 2.6 and up says that the
4937 system can support "thousands" of hardware watchpoints, but gives
4938 no method for finding out how many; It doesn't say anything about
4939 the allowed size for the watched area either. So we just tell
4945 procfs_use_watchpoints (struct target_ops *t)
4947 t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint;
4948 t->to_insert_watchpoint = procfs_insert_watchpoint;
4949 t->to_remove_watchpoint = procfs_remove_watchpoint;
4950 t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint;
4951 t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint;
4952 t->to_stopped_data_address = procfs_stopped_data_address;
4955 /* Memory Mappings Functions: */
4957 /* Call a callback function once for each mapping, passing it the
4958 mapping, an optional secondary callback function, and some optional
4959 opaque data. Quit and return the first non-zero value returned
4962 PI is the procinfo struct for the process to be mapped. FUNC is
4963 the callback function to be called by this iterator. DATA is the
4964 optional opaque data to be passed to the callback function.
4965 CHILD_FUNC is the optional secondary function pointer to be passed
4966 to the child function. Returns the first non-zero return value
4967 from the callback function, or zero. */
4970 iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func,
4972 int (*func) (struct prmap *map,
4973 find_memory_region_ftype child_func,
4976 char pathname[MAX_PROC_NAME_SIZE];
4977 struct prmap *prmaps;
4978 struct prmap *prmap;
4982 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
4987 /* Get the number of mappings, allocate space,
4988 and read the mappings into prmaps. */
4991 sprintf (pathname, "/proc/%d/map", pi->pid);
4992 if ((map_fd = open (pathname, O_RDONLY)) < 0)
4993 proc_error (pi, "iterate_over_mappings (open)", __LINE__);
4995 /* Make sure it gets closed again. */
4996 make_cleanup_close (map_fd);
4998 /* Use stat to determine the file size, and compute
4999 the number of prmap_t objects it contains. */
5000 if (fstat (map_fd, &sbuf) != 0)
5001 proc_error (pi, "iterate_over_mappings (fstat)", __LINE__);
5003 nmap = sbuf.st_size / sizeof (prmap_t);
5004 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
5005 if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps))
5006 != (nmap * sizeof (*prmaps)))
5007 proc_error (pi, "iterate_over_mappings (read)", __LINE__);
5009 /* Use ioctl command PIOCNMAP to get number of mappings. */
5010 if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0)
5011 proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__);
5013 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
5014 if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0)
5015 proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__);
5018 for (prmap = prmaps; nmap > 0; prmap++, nmap--)
5019 if ((funcstat = (*func) (prmap, child_func, data)) != 0)
5021 do_cleanups (cleanups);
5025 do_cleanups (cleanups);
5029 /* Implements the to_find_memory_regions method. Calls an external
5030 function for each memory region.
5031 Returns the integer value returned by the callback. */
5034 find_memory_regions_callback (struct prmap *map,
5035 find_memory_region_ftype func, void *data)
5037 return (*func) ((CORE_ADDR) map->pr_vaddr,
5039 (map->pr_mflags & MA_READ) != 0,
5040 (map->pr_mflags & MA_WRITE) != 0,
5041 (map->pr_mflags & MA_EXEC) != 0,
5042 1, /* MODIFIED is unknown, pass it as true. */
5046 /* External interface. Calls a callback function once for each
5047 mapped memory region in the child process, passing as arguments:
5049 CORE_ADDR virtual_address,
5051 int read, TRUE if region is readable by the child
5052 int write, TRUE if region is writable by the child
5053 int execute TRUE if region is executable by the child.
5055 Stops iterating and returns the first non-zero value returned by
5059 proc_find_memory_regions (find_memory_region_ftype func, void *data)
5061 procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
5063 return iterate_over_mappings (pi, func, data,
5064 find_memory_regions_callback);
5067 /* Returns an ascii representation of a memory mapping's flags. */
5070 mappingflags (long flags)
5072 static char asciiflags[8];
5074 strcpy (asciiflags, "-------");
5075 #if defined (MA_PHYS)
5076 if (flags & MA_PHYS)
5077 asciiflags[0] = 'd';
5079 if (flags & MA_STACK)
5080 asciiflags[1] = 's';
5081 if (flags & MA_BREAK)
5082 asciiflags[2] = 'b';
5083 if (flags & MA_SHARED)
5084 asciiflags[3] = 's';
5085 if (flags & MA_READ)
5086 asciiflags[4] = 'r';
5087 if (flags & MA_WRITE)
5088 asciiflags[5] = 'w';
5089 if (flags & MA_EXEC)
5090 asciiflags[6] = 'x';
5091 return (asciiflags);
5094 /* Callback function, does the actual work for 'info proc
5098 info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore,
5101 unsigned int pr_off;
5103 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
5104 pr_off = (unsigned int) map->pr_offset;
5106 pr_off = map->pr_off;
5109 if (gdbarch_addr_bit (target_gdbarch ()) == 32)
5110 printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n",
5111 (unsigned long) map->pr_vaddr,
5112 (unsigned long) map->pr_vaddr + map->pr_size - 1,
5113 (unsigned long) map->pr_size,
5115 mappingflags (map->pr_mflags));
5117 printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n",
5118 (unsigned long) map->pr_vaddr,
5119 (unsigned long) map->pr_vaddr + map->pr_size - 1,
5120 (unsigned long) map->pr_size,
5122 mappingflags (map->pr_mflags));
5127 /* Implement the "info proc mappings" subcommand. */
5130 info_proc_mappings (procinfo *pi, int summary)
5133 return; /* No output for summary mode. */
5135 printf_filtered (_("Mapped address spaces:\n\n"));
5136 if (gdbarch_ptr_bit (target_gdbarch ()) == 32)
5137 printf_filtered ("\t%10s %10s %10s %10s %7s\n",
5144 printf_filtered (" %18s %18s %10s %10s %7s\n",
5151 iterate_over_mappings (pi, NULL, NULL, info_mappings_callback);
5152 printf_filtered ("\n");
5155 /* Implement the "info proc" command. */
5158 procfs_info_proc (struct target_ops *ops, char *args,
5159 enum info_proc_what what)
5161 struct cleanup *old_chain;
5162 procinfo *process = NULL;
5163 procinfo *thread = NULL;
5181 error (_("Not supported on this target."));
5184 old_chain = make_cleanup (null_cleanup, 0);
5187 argv = gdb_buildargv (args);
5188 make_cleanup_freeargv (argv);
5190 while (argv != NULL && *argv != NULL)
5192 if (isdigit (argv[0][0]))
5194 pid = strtoul (argv[0], &tmp, 10);
5196 tid = strtoul (++tmp, NULL, 10);
5198 else if (argv[0][0] == '/')
5200 tid = strtoul (argv[0] + 1, NULL, 10);
5205 pid = ptid_get_pid (inferior_ptid);
5207 error (_("No current process: you must name one."));
5210 /* Have pid, will travel.
5211 First see if it's a process we're already debugging. */
5212 process = find_procinfo (pid, 0);
5213 if (process == NULL)
5215 /* No. So open a procinfo for it, but
5216 remember to close it again when finished. */
5217 process = create_procinfo (pid, 0);
5218 make_cleanup (do_destroy_procinfo_cleanup, process);
5219 if (!open_procinfo_files (process, FD_CTL))
5220 proc_error (process, "info proc, open_procinfo_files", __LINE__);
5224 thread = create_procinfo (pid, tid);
5228 printf_filtered (_("process %d flags:\n"), process->pid);
5229 proc_prettyprint_flags (proc_flags (process), 1);
5230 if (proc_flags (process) & (PR_STOPPED | PR_ISTOP))
5231 proc_prettyprint_why (proc_why (process), proc_what (process), 1);
5232 if (proc_get_nthreads (process) > 1)
5233 printf_filtered ("Process has %d threads.\n",
5234 proc_get_nthreads (process));
5238 printf_filtered (_("thread %d flags:\n"), thread->tid);
5239 proc_prettyprint_flags (proc_flags (thread), 1);
5240 if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP))
5241 proc_prettyprint_why (proc_why (thread), proc_what (thread), 1);
5246 info_proc_mappings (process, 0);
5249 do_cleanups (old_chain);
5252 /* Modify the status of the system call identified by SYSCALLNUM in
5253 the set of syscalls that are currently traced/debugged.
5255 If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set
5256 will be updated. Otherwise, the exit syscalls set will be updated.
5258 If MODE is FLAG_SET, then traces will be enabled. Otherwise, they
5259 will be disabled. */
5262 proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit,
5263 int mode, int from_tty)
5267 if (entry_or_exit == PR_SYSENTRY)
5268 sysset = proc_get_traced_sysentry (pi, NULL);
5270 sysset = proc_get_traced_sysexit (pi, NULL);
5273 proc_error (pi, "proc-trace, get_traced_sysset", __LINE__);
5275 if (mode == FLAG_SET)
5276 gdb_praddsysset (sysset, syscallnum);
5278 gdb_prdelsysset (sysset, syscallnum);
5280 if (entry_or_exit == PR_SYSENTRY)
5282 if (!proc_set_traced_sysentry (pi, sysset))
5283 proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__);
5287 if (!proc_set_traced_sysexit (pi, sysset))
5288 proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__);
5293 proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode)
5297 if (ptid_get_pid (inferior_ptid) <= 0)
5298 error (_("you must be debugging a process to use this command."));
5300 if (args == NULL || args[0] == 0)
5301 error_no_arg (_("system call to trace"));
5303 pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
5304 if (isdigit (args[0]))
5306 const int syscallnum = atoi (args);
5308 proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty);
5313 proc_trace_sysentry_cmd (char *args, int from_tty)
5315 proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET);
5319 proc_trace_sysexit_cmd (char *args, int from_tty)
5321 proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET);
5325 proc_untrace_sysentry_cmd (char *args, int from_tty)
5327 proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET);
5331 proc_untrace_sysexit_cmd (char *args, int from_tty)
5333 proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET);
5337 /* Provide a prototype to silence -Wmissing-prototypes. */
5338 extern void _initialize_procfs (void);
5341 _initialize_procfs (void)
5343 observer_attach_inferior_created (procfs_inferior_created);
5345 add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd,
5346 _("Give a trace of entries into the syscall."));
5347 add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd,
5348 _("Give a trace of exits from the syscall."));
5349 add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd,
5350 _("Cancel a trace of entries into the syscall."));
5351 add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd,
5352 _("Cancel a trace of exits from the syscall."));
5355 /* =================== END, GDB "MODULE" =================== */
5359 /* miscellaneous stubs: */
5361 /* The following satisfy a few random symbols mostly created by the
5362 solaris threads implementation, which I will chase down later. */
5364 /* Return a pid for which we guarantee we will be able to find a
5368 procfs_first_available (void)
5370 return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1);
5373 /* =================== GCORE .NOTE "MODULE" =================== */
5374 #if defined (PIOCOPENLWP) || defined (PCAGENT)
5375 /* gcore only implemented on solaris (so far) */
5378 procfs_do_thread_registers (bfd *obfd, ptid_t ptid,
5379 char *note_data, int *note_size,
5380 enum gdb_signal stop_signal)
5382 struct regcache *regcache = get_thread_regcache (ptid);
5383 gdb_gregset_t gregs;
5384 gdb_fpregset_t fpregs;
5385 unsigned long merged_pid;
5386 struct cleanup *old_chain;
5388 merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid);
5390 /* This part is the old method for fetching registers.
5391 It should be replaced by the newer one using regsets
5392 once it is implemented in this platform:
5393 gdbarch_regset_from_core_section() and regset->collect_regset(). */
5395 old_chain = save_inferior_ptid ();
5396 inferior_ptid = ptid;
5397 target_fetch_registers (regcache, -1);
5399 fill_gregset (regcache, &gregs, -1);
5400 #if defined (NEW_PROC_API)
5401 note_data = (char *) elfcore_write_lwpstatus (obfd,
5408 note_data = (char *) elfcore_write_prstatus (obfd,
5415 fill_fpregset (regcache, &fpregs, -1);
5416 note_data = (char *) elfcore_write_prfpreg (obfd,
5422 do_cleanups (old_chain);
5427 struct procfs_corefile_thread_data {
5431 enum gdb_signal stop_signal;
5435 procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data)
5437 struct procfs_corefile_thread_data *args = data;
5441 ptid_t ptid = ptid_build (pi->pid, thread->tid, 0);
5443 args->note_data = procfs_do_thread_registers (args->obfd, ptid,
5452 find_signalled_thread (struct thread_info *info, void *data)
5454 if (info->suspend.stop_signal != GDB_SIGNAL_0
5455 && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
5461 static enum gdb_signal
5462 find_stop_signal (void)
5464 struct thread_info *info =
5465 iterate_over_threads (find_signalled_thread, NULL);
5468 return info->suspend.stop_signal;
5470 return GDB_SIGNAL_0;
5474 procfs_make_note_section (bfd *obfd, int *note_size)
5476 struct cleanup *old_chain;
5477 gdb_gregset_t gregs;
5478 gdb_fpregset_t fpregs;
5479 char fname[16] = {'\0'};
5480 char psargs[80] = {'\0'};
5481 procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0);
5482 char *note_data = NULL;
5484 struct procfs_corefile_thread_data thread_args;
5487 enum gdb_signal stop_signal;
5489 if (get_exec_file (0))
5491 strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname));
5492 fname[sizeof (fname) - 1] = 0;
5493 strncpy (psargs, get_exec_file (0), sizeof (psargs));
5494 psargs[sizeof (psargs) - 1] = 0;
5496 inf_args = get_inferior_args ();
5497 if (inf_args && *inf_args &&
5498 strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs)))
5500 strncat (psargs, " ",
5501 sizeof (psargs) - strlen (psargs));
5502 strncat (psargs, inf_args,
5503 sizeof (psargs) - strlen (psargs));
5507 note_data = (char *) elfcore_write_prpsinfo (obfd,
5513 stop_signal = find_stop_signal ();
5516 fill_gregset (get_current_regcache (), &gregs, -1);
5517 note_data = elfcore_write_pstatus (obfd, note_data, note_size,
5518 ptid_get_pid (inferior_ptid),
5519 stop_signal, &gregs);
5522 thread_args.obfd = obfd;
5523 thread_args.note_data = note_data;
5524 thread_args.note_size = note_size;
5525 thread_args.stop_signal = stop_signal;
5526 proc_iterate_over_threads (pi, procfs_corefile_thread_callback,
5528 note_data = thread_args.note_data;
5530 auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV,
5534 note_data = elfcore_write_note (obfd, note_data, note_size,
5535 "CORE", NT_AUXV, auxv, auxv_len);
5539 make_cleanup (xfree, note_data);
5542 #else /* !Solaris */
5544 procfs_make_note_section (bfd *obfd, int *note_size)
5546 error (_("gcore not implemented for this host."));
5547 return NULL; /* lint */
5549 #endif /* Solaris */
5550 /* =================== END GCORE .NOTE "MODULE" =================== */