1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
3 Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007, 2008
4 Free Software Foundation, Inc.
6 Written by Michael Snyder at Cygnus Solutions.
7 Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 #include "elf-bfd.h" /* for elfcore_write_* */
30 #include "gdbthread.h"
33 #if defined (NEW_PROC_API)
34 #define _STRUCTURED_PROC 1 /* Should be done by configure script. */
37 #include <sys/procfs.h>
38 #ifdef HAVE_SYS_FAULT_H
39 #include <sys/fault.h>
41 #ifdef HAVE_SYS_SYSCALL_H
42 #include <sys/syscall.h>
44 #include <sys/errno.h>
48 #include "gdb_string.h"
49 #include "gdb_assert.h"
56 * This module provides the interface between GDB and the
57 * /proc file system, which is used on many versions of Unix
58 * as a means for debuggers to control other processes.
59 * Examples of the systems that use this interface are:
66 * /proc works by imitating a file system: you open a simulated file
67 * that represents the process you wish to interact with, and
68 * perform operations on that "file" in order to examine or change
69 * the state of the other process.
71 * The most important thing to know about /proc and this module
72 * is that there are two very different interfaces to /proc:
73 * One that uses the ioctl system call, and
74 * another that uses read and write system calls.
75 * This module has to support both /proc interfaces. This means
76 * that there are two different ways of doing every basic operation.
78 * In order to keep most of the code simple and clean, I have
79 * defined an interface "layer" which hides all these system calls.
80 * An ifdef (NEW_PROC_API) determines which interface we are using,
81 * and most or all occurrances of this ifdef should be confined to
82 * this interface layer.
86 /* Determine which /proc API we are using:
87 The ioctl API defines PIOCSTATUS, while
88 the read/write (multiple fd) API never does. */
91 #include <sys/types.h>
92 #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */
95 #include <fcntl.h> /* for O_RDONLY */
96 #include <unistd.h> /* for "X_OK" */
97 #include "gdb_stat.h" /* for struct stat */
99 /* Note: procfs-utils.h must be included after the above system header
100 files, because it redefines various system calls using macros.
101 This may be incompatible with the prototype declarations. */
103 #include "proc-utils.h"
105 /* Prototypes for supply_gregset etc. */
108 /* =================== TARGET_OPS "MODULE" =================== */
111 * This module defines the GDB target vector and its methods.
114 static void procfs_open (char *, int);
115 static void procfs_attach (char *, int);
116 static void procfs_detach (char *, int);
117 static void procfs_resume (ptid_t, int, enum target_signal);
118 static int procfs_can_run (void);
119 static void procfs_stop (void);
120 static void procfs_files_info (struct target_ops *);
121 static void procfs_fetch_registers (struct regcache *, int);
122 static void procfs_store_registers (struct regcache *, int);
123 static void procfs_notice_signals (ptid_t);
124 static void procfs_prepare_to_store (struct regcache *);
125 static void procfs_kill_inferior (void);
126 static void procfs_mourn_inferior (void);
127 static void procfs_create_inferior (char *, char *, char **, int);
128 static ptid_t procfs_wait (ptid_t, struct target_waitstatus *);
129 static int procfs_xfer_memory (CORE_ADDR, char *, int, int,
130 struct mem_attrib *attrib,
131 struct target_ops *);
132 static LONGEST procfs_xfer_partial (struct target_ops *ops,
133 enum target_object object,
135 void *readbuf, const void *writebuf,
136 ULONGEST offset, LONGEST len);
138 static int procfs_thread_alive (ptid_t);
140 void procfs_find_new_threads (void);
141 char *procfs_pid_to_str (ptid_t);
143 static int proc_find_memory_regions (int (*) (CORE_ADDR,
149 static char * procfs_make_note_section (bfd *, int *);
151 static int procfs_can_use_hw_breakpoint (int, int, int);
153 struct target_ops procfs_ops; /* the target vector */
156 init_procfs_ops (void)
158 procfs_ops.to_shortname = "procfs";
159 procfs_ops.to_longname = "Unix /proc child process";
161 "Unix /proc child process (started by the \"run\" command).";
162 procfs_ops.to_open = procfs_open;
163 procfs_ops.to_can_run = procfs_can_run;
164 procfs_ops.to_create_inferior = procfs_create_inferior;
165 procfs_ops.to_kill = procfs_kill_inferior;
166 procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
167 procfs_ops.to_attach = procfs_attach;
168 procfs_ops.to_detach = procfs_detach;
169 procfs_ops.to_wait = procfs_wait;
170 procfs_ops.to_resume = procfs_resume;
171 procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
172 procfs_ops.to_fetch_registers = procfs_fetch_registers;
173 procfs_ops.to_store_registers = procfs_store_registers;
174 procfs_ops.to_xfer_partial = procfs_xfer_partial;
175 procfs_ops.deprecated_xfer_memory = procfs_xfer_memory;
176 procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
177 procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
178 procfs_ops.to_notice_signals = procfs_notice_signals;
179 procfs_ops.to_files_info = procfs_files_info;
180 procfs_ops.to_stop = procfs_stop;
182 procfs_ops.to_terminal_init = terminal_init_inferior;
183 procfs_ops.to_terminal_inferior = terminal_inferior;
184 procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output;
185 procfs_ops.to_terminal_ours = terminal_ours;
186 procfs_ops.to_terminal_save_ours = terminal_save_ours;
187 procfs_ops.to_terminal_info = child_terminal_info;
189 procfs_ops.to_find_new_threads = procfs_find_new_threads;
190 procfs_ops.to_thread_alive = procfs_thread_alive;
191 procfs_ops.to_pid_to_str = procfs_pid_to_str;
193 procfs_ops.to_has_all_memory = 1;
194 procfs_ops.to_has_memory = 1;
195 procfs_ops.to_has_execution = 1;
196 procfs_ops.to_has_stack = 1;
197 procfs_ops.to_has_registers = 1;
198 procfs_ops.to_stratum = process_stratum;
199 procfs_ops.to_has_thread_control = tc_schedlock;
200 procfs_ops.to_find_memory_regions = proc_find_memory_regions;
201 procfs_ops.to_make_corefile_notes = procfs_make_note_section;
202 procfs_ops.to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint;
203 procfs_ops.to_magic = OPS_MAGIC;
206 /* =================== END, TARGET_OPS "MODULE" =================== */
211 * Put any typedefs, defines etc. here that are required for
212 * the unification of code that handles different versions of /proc.
215 #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */
217 enum { READ_WATCHFLAG = WA_READ,
218 WRITE_WATCHFLAG = WA_WRITE,
219 EXEC_WATCHFLAG = WA_EXEC,
220 AFTER_WATCHFLAG = WA_TRAPAFTER
223 #else /* Irix method for watchpoints */
224 enum { READ_WATCHFLAG = MA_READ,
225 WRITE_WATCHFLAG = MA_WRITE,
226 EXEC_WATCHFLAG = MA_EXEC,
227 AFTER_WATCHFLAG = 0 /* trapafter not implemented */
232 #ifdef HAVE_PR_SIGSET_T
233 typedef pr_sigset_t gdb_sigset_t;
235 typedef sigset_t gdb_sigset_t;
239 #ifdef HAVE_PR_SIGACTION64_T
240 typedef pr_sigaction64_t gdb_sigaction_t;
242 typedef struct sigaction gdb_sigaction_t;
246 #ifdef HAVE_PR_SIGINFO64_T
247 typedef pr_siginfo64_t gdb_siginfo_t;
249 typedef struct siginfo gdb_siginfo_t;
252 /* gdb_premptysysset */
254 #define gdb_premptysysset premptysysset
256 #define gdb_premptysysset premptyset
261 #define gdb_praddsysset praddsysset
263 #define gdb_praddsysset praddset
268 #define gdb_prdelsysset prdelsysset
270 #define gdb_prdelsysset prdelset
273 /* prissyssetmember */
274 #ifdef prissyssetmember
275 #define gdb_pr_issyssetmember prissyssetmember
277 #define gdb_pr_issyssetmember prismember
280 /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't
281 as intuitively descriptive as it could be, so we'll define
282 DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of
283 this writing, this feature is only found on AIX5 systems and
284 basically means that the set of syscalls is not fixed. I.e,
285 there's no nice table that one can #include to get all of the
286 syscall numbers. Instead, they're stored in /proc/PID/sysent
287 for each process. We are at least guaranteed that they won't
288 change over the lifetime of the process. But each process could
289 (in theory) have different syscall numbers.
291 #ifdef HAVE_PRSYSENT_T
292 #define DYNAMIC_SYSCALLS
297 /* =================== STRUCT PROCINFO "MODULE" =================== */
299 /* FIXME: this comment will soon be out of date W.R.T. threads. */
301 /* The procinfo struct is a wrapper to hold all the state information
302 concerning a /proc process. There should be exactly one procinfo
303 for each process, and since GDB currently can debug only one
304 process at a time, that means there should be only one procinfo.
305 All of the LWP's of a process can be accessed indirectly thru the
306 single process procinfo.
308 However, against the day when GDB may debug more than one process,
309 this data structure is kept in a list (which for now will hold no
310 more than one member), and many functions will have a pointer to a
311 procinfo as an argument.
313 There will be a separate procinfo structure for use by the (not yet
314 implemented) "info proc" command, so that we can print useful
315 information about any random process without interfering with the
316 inferior's procinfo information. */
319 /* format strings for /proc paths */
320 # ifndef CTL_PROC_NAME_FMT
321 # define MAIN_PROC_NAME_FMT "/proc/%d"
322 # define CTL_PROC_NAME_FMT "/proc/%d/ctl"
323 # define AS_PROC_NAME_FMT "/proc/%d/as"
324 # define MAP_PROC_NAME_FMT "/proc/%d/map"
325 # define STATUS_PROC_NAME_FMT "/proc/%d/status"
326 # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus")
328 /* the name of the proc status struct depends on the implementation */
329 typedef pstatus_t gdb_prstatus_t;
330 typedef lwpstatus_t gdb_lwpstatus_t;
331 #else /* ! NEW_PROC_API */
332 /* format strings for /proc paths */
333 # ifndef CTL_PROC_NAME_FMT
334 # define MAIN_PROC_NAME_FMT "/proc/%05d"
335 # define CTL_PROC_NAME_FMT "/proc/%05d"
336 # define AS_PROC_NAME_FMT "/proc/%05d"
337 # define MAP_PROC_NAME_FMT "/proc/%05d"
338 # define STATUS_PROC_NAME_FMT "/proc/%05d"
339 # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp")
341 /* the name of the proc status struct depends on the implementation */
342 typedef prstatus_t gdb_prstatus_t;
343 typedef prstatus_t gdb_lwpstatus_t;
344 #endif /* NEW_PROC_API */
346 typedef struct procinfo {
347 struct procinfo *next;
348 int pid; /* Process ID */
349 int tid; /* Thread/LWP id */
353 int ignore_next_sigstop;
355 /* The following four fd fields may be identical, or may contain
356 several different fd's, depending on the version of /proc
357 (old ioctl or new read/write). */
359 int ctl_fd; /* File descriptor for /proc control file */
361 * The next three file descriptors are actually only needed in the
362 * read/write, multiple-file-descriptor implemenation (NEW_PROC_API).
363 * However, to avoid a bunch of #ifdefs in the code, we will use
364 * them uniformly by (in the case of the ioctl single-file-descriptor
365 * implementation) filling them with copies of the control fd.
367 int status_fd; /* File descriptor for /proc status file */
368 int as_fd; /* File descriptor for /proc as file */
370 char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */
372 fltset_t saved_fltset; /* Saved traced hardware fault set */
373 gdb_sigset_t saved_sigset; /* Saved traced signal set */
374 gdb_sigset_t saved_sighold; /* Saved held signal set */
375 sysset_t *saved_exitset; /* Saved traced system call exit set */
376 sysset_t *saved_entryset; /* Saved traced system call entry set */
378 gdb_prstatus_t prstatus; /* Current process status info */
381 gdb_fpregset_t fpregset; /* Current floating point registers */
384 #ifdef DYNAMIC_SYSCALLS
385 int num_syscalls; /* Total number of syscalls */
386 char **syscall_names; /* Syscall number to name map */
389 struct procinfo *thread_list;
391 int status_valid : 1;
393 int fpregs_valid : 1;
394 int threads_valid: 1;
397 static char errmsg[128]; /* shared error msg buffer */
399 /* Function prototypes for procinfo module: */
401 static procinfo *find_procinfo_or_die (int pid, int tid);
402 static procinfo *find_procinfo (int pid, int tid);
403 static procinfo *create_procinfo (int pid, int tid);
404 static void destroy_procinfo (procinfo * p);
405 static void do_destroy_procinfo_cleanup (void *);
406 static void dead_procinfo (procinfo * p, char *msg, int killp);
407 static int open_procinfo_files (procinfo * p, int which);
408 static void close_procinfo_files (procinfo * p);
409 static int sysset_t_size (procinfo *p);
410 static sysset_t *sysset_t_alloc (procinfo * pi);
411 #ifdef DYNAMIC_SYSCALLS
412 static void load_syscalls (procinfo *pi);
413 static void free_syscalls (procinfo *pi);
414 static int find_syscall (procinfo *pi, char *name);
415 #endif /* DYNAMIC_SYSCALLS */
417 /* The head of the procinfo list: */
418 static procinfo * procinfo_list;
421 * Function: find_procinfo
423 * Search the procinfo list.
425 * Returns: pointer to procinfo, or NULL if not found.
429 find_procinfo (int pid, int tid)
433 for (pi = procinfo_list; pi; pi = pi->next)
440 /* Don't check threads_valid. If we're updating the
441 thread_list, we want to find whatever threads are already
442 here. This means that in general it is the caller's
443 responsibility to check threads_valid and update before
444 calling find_procinfo, if the caller wants to find a new
447 for (pi = pi->thread_list; pi; pi = pi->next)
456 * Function: find_procinfo_or_die
458 * Calls find_procinfo, but errors on failure.
462 find_procinfo_or_die (int pid, int tid)
464 procinfo *pi = find_procinfo (pid, tid);
469 error (_("procfs: couldn't find pid %d (kernel thread %d) in procinfo list."),
472 error (_("procfs: couldn't find pid %d in procinfo list."), pid);
477 /* open_with_retry() is a wrapper for open(). The appropriate
478 open() call is attempted; if unsuccessful, it will be retried as
479 many times as needed for the EAGAIN and EINTR conditions.
481 For other conditions, open_with_retry() will retry the open() a
482 limited number of times. In addition, a short sleep is imposed
483 prior to retrying the open(). The reason for this sleep is to give
484 the kernel a chance to catch up and create the file in question in
485 the event that GDB "wins" the race to open a file before the kernel
489 open_with_retry (const char *pathname, int flags)
491 int retries_remaining, status;
493 retries_remaining = 2;
497 status = open (pathname, flags);
499 if (status >= 0 || retries_remaining == 0)
501 else if (errno != EINTR && errno != EAGAIN)
512 * Function: open_procinfo_files
514 * Open the file descriptor for the process or LWP.
515 * ifdef NEW_PROC_API, we only open the control file descriptor;
516 * the others are opened lazily as needed.
517 * else (if not NEW_PROC_API), there is only one real
518 * file descriptor, but we keep multiple copies of it so that
519 * the code that uses them does not have to be #ifdef'd.
521 * Return: file descriptor, or zero for failure.
524 enum { FD_CTL, FD_STATUS, FD_AS };
527 open_procinfo_files (procinfo *pi, int which)
530 char tmp[MAX_PROC_NAME_SIZE];
535 * This function is getting ALMOST long enough to break up into several.
536 * Here is some rationale:
538 * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware):
539 * There are several file descriptors that may need to be open
540 * for any given process or LWP. The ones we're intereted in are:
541 * - control (ctl) write-only change the state
542 * - status (status) read-only query the state
543 * - address space (as) read/write access memory
544 * - map (map) read-only virtual addr map
545 * Most of these are opened lazily as they are needed.
546 * The pathnames for the 'files' for an LWP look slightly
547 * different from those of a first-class process:
548 * Pathnames for a process (<proc-id>):
549 * /proc/<proc-id>/ctl
550 * /proc/<proc-id>/status
552 * /proc/<proc-id>/map
553 * Pathnames for an LWP (lwp-id):
554 * /proc/<proc-id>/lwp/<lwp-id>/lwpctl
555 * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus
556 * An LWP has no map or address space file descriptor, since
557 * the memory map and address space are shared by all LWPs.
559 * Everyone else (Solaris 2.5, Irix, OSF)
560 * There is only one file descriptor for each process or LWP.
561 * For convenience, we copy the same file descriptor into all
562 * three fields of the procinfo struct (ctl_fd, status_fd, and
563 * as_fd, see NEW_PROC_API above) so that code that uses them
564 * doesn't need any #ifdef's.
569 * Each LWP has an independent file descriptor, but these
570 * are not obtained via the 'open' system call like the rest:
571 * instead, they're obtained thru an ioctl call (PIOCOPENLWP)
572 * to the file descriptor of the parent process.
575 * These do not even have their own independent file descriptor.
576 * All operations are carried out on the file descriptor of the
577 * parent process. Therefore we just call open again for each
578 * thread, getting a new handle for the same 'file'.
583 * In this case, there are several different file descriptors that
584 * we might be asked to open. The control file descriptor will be
585 * opened early, but the others will be opened lazily as they are
589 strcpy (tmp, pi->pathname);
590 switch (which) { /* which file descriptor to open? */
593 strcat (tmp, "/lwpctl");
595 strcat (tmp, "/ctl");
596 fd = open_with_retry (tmp, O_WRONLY);
603 return 0; /* there is no 'as' file descriptor for an lwp */
605 fd = open_with_retry (tmp, O_RDWR);
612 strcat (tmp, "/lwpstatus");
614 strcat (tmp, "/status");
615 fd = open_with_retry (tmp, O_RDONLY);
621 return 0; /* unknown file descriptor */
623 #else /* not NEW_PROC_API */
625 * In this case, there is only one file descriptor for each procinfo
626 * (ie. each process or LWP). In fact, only the file descriptor for
627 * the process can actually be opened by an 'open' system call.
628 * The ones for the LWPs have to be obtained thru an IOCTL call
629 * on the process's file descriptor.
631 * For convenience, we copy each procinfo's single file descriptor
632 * into all of the fields occupied by the several file descriptors
633 * of the NEW_PROC_API implementation. That way, the code that uses
634 * them can be written without ifdefs.
638 #ifdef PIOCTSTATUS /* OSF */
639 /* Only one FD; just open it. */
640 if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0)
642 #else /* Sol 2.5, Irix, other? */
643 if (pi->tid == 0) /* Master procinfo for the process */
645 fd = open_with_retry (pi->pathname, O_RDWR);
649 else /* LWP thread procinfo */
651 #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */
655 /* Find the procinfo for the entire process. */
656 if ((process = find_procinfo (pi->pid, 0)) == NULL)
659 /* Now obtain the file descriptor for the LWP. */
660 if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0)
662 #else /* Irix, other? */
663 return 0; /* Don't know how to open threads */
664 #endif /* Sol 2.5 PIOCOPENLWP */
666 #endif /* OSF PIOCTSTATUS */
667 pi->ctl_fd = pi->as_fd = pi->status_fd = fd;
668 #endif /* NEW_PROC_API */
670 return 1; /* success */
674 * Function: create_procinfo
676 * Allocate a data structure and link it into the procinfo list.
677 * (First tries to find a pre-existing one (FIXME: why?)
679 * Return: pointer to new procinfo struct.
683 create_procinfo (int pid, int tid)
685 procinfo *pi, *parent;
687 if ((pi = find_procinfo (pid, tid)))
688 return pi; /* Already exists, nothing to do. */
690 /* find parent before doing malloc, to save having to cleanup */
692 parent = find_procinfo_or_die (pid, 0); /* FIXME: should I
694 doesn't exist yet? */
696 pi = (procinfo *) xmalloc (sizeof (procinfo));
697 memset (pi, 0, sizeof (procinfo));
701 #ifdef DYNAMIC_SYSCALLS
705 pi->saved_entryset = sysset_t_alloc (pi);
706 pi->saved_exitset = sysset_t_alloc (pi);
708 /* Chain into list. */
711 sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
712 pi->next = procinfo_list;
718 sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid);
720 sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
722 pi->next = parent->thread_list;
723 parent->thread_list = pi;
729 * Function: close_procinfo_files
731 * Close all file descriptors associated with the procinfo
735 close_procinfo_files (procinfo *pi)
742 if (pi->status_fd > 0)
743 close (pi->status_fd);
745 pi->ctl_fd = pi->as_fd = pi->status_fd = 0;
749 * Function: destroy_procinfo
751 * Destructor function. Close, unlink and deallocate the object.
755 destroy_one_procinfo (procinfo **list, procinfo *pi)
759 /* Step one: unlink the procinfo from its list */
763 for (ptr = *list; ptr; ptr = ptr->next)
766 ptr->next = pi->next;
770 /* Step two: close any open file descriptors */
771 close_procinfo_files (pi);
773 /* Step three: free the memory. */
774 #ifdef DYNAMIC_SYSCALLS
777 xfree (pi->saved_entryset);
778 xfree (pi->saved_exitset);
783 destroy_procinfo (procinfo *pi)
787 if (pi->tid != 0) /* destroy a thread procinfo */
789 tmp = find_procinfo (pi->pid, 0); /* find the parent process */
790 destroy_one_procinfo (&tmp->thread_list, pi);
792 else /* destroy a process procinfo and all its threads */
794 /* First destroy the children, if any; */
795 while (pi->thread_list != NULL)
796 destroy_one_procinfo (&pi->thread_list, pi->thread_list);
797 /* Then destroy the parent. Genocide!!! */
798 destroy_one_procinfo (&procinfo_list, pi);
803 do_destroy_procinfo_cleanup (void *pi)
805 destroy_procinfo (pi);
808 enum { NOKILL, KILL };
811 * Function: dead_procinfo
813 * To be called on a non_recoverable error for a procinfo.
814 * Prints error messages, optionally sends a SIGKILL to the process,
815 * then destroys the data structure.
819 dead_procinfo (procinfo *pi, char *msg, int kill_p)
825 print_sys_errmsg (pi->pathname, errno);
829 sprintf (procfile, "process %d", pi->pid);
830 print_sys_errmsg (procfile, errno);
833 kill (pi->pid, SIGKILL);
835 destroy_procinfo (pi);
840 * Function: sysset_t_size
842 * Returns the (complete) size of a sysset_t struct. Normally, this
843 * is just sizeof (syset_t), but in the case of Monterey/64, the actual
844 * size of sysset_t isn't known until runtime.
848 sysset_t_size (procinfo * pi)
850 #ifndef DYNAMIC_SYSCALLS
851 return sizeof (sysset_t);
853 return sizeof (sysset_t) - sizeof (uint64_t)
854 + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
855 / (8 * sizeof (uint64_t)));
859 /* Function: sysset_t_alloc
861 Allocate and (partially) initialize a sysset_t struct. */
864 sysset_t_alloc (procinfo * pi)
867 int size = sysset_t_size (pi);
868 ret = xmalloc (size);
869 #ifdef DYNAMIC_SYSCALLS
870 ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
871 / (8 * sizeof (uint64_t));
876 #ifdef DYNAMIC_SYSCALLS
878 /* Function: load_syscalls
880 Extract syscall numbers and names from /proc/<pid>/sysent. Initialize
881 pi->num_syscalls with the number of syscalls and pi->syscall_names
882 with the names. (Certain numbers may be skipped in which case the
883 names for these numbers will be left as NULL.) */
885 #define MAX_SYSCALL_NAME_LENGTH 256
886 #define MAX_SYSCALLS 65536
889 load_syscalls (procinfo *pi)
891 char pathname[MAX_PROC_NAME_SIZE];
894 prsyscall_t *syscalls;
895 int i, size, maxcall;
897 pi->num_syscalls = 0;
898 pi->syscall_names = 0;
900 /* Open the file descriptor for the sysent file */
901 sprintf (pathname, "/proc/%d/sysent", pi->pid);
902 sysent_fd = open_with_retry (pathname, O_RDONLY);
905 error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid);
908 size = sizeof header - sizeof (prsyscall_t);
909 if (read (sysent_fd, &header, size) != size)
911 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
914 if (header.pr_nsyscalls == 0)
916 error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid);
919 size = header.pr_nsyscalls * sizeof (prsyscall_t);
920 syscalls = xmalloc (size);
922 if (read (sysent_fd, syscalls, size) != size)
925 error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
928 /* Find maximum syscall number. This may not be the same as
929 pr_nsyscalls since that value refers to the number of entries
930 in the table. (Also, the docs indicate that some system
931 call numbers may be skipped.) */
933 maxcall = syscalls[0].pr_number;
935 for (i = 1; i < header.pr_nsyscalls; i++)
936 if (syscalls[i].pr_number > maxcall
937 && syscalls[i].pr_nameoff > 0
938 && syscalls[i].pr_number < MAX_SYSCALLS)
939 maxcall = syscalls[i].pr_number;
941 pi->num_syscalls = maxcall+1;
942 pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *));
944 for (i = 0; i < pi->num_syscalls; i++)
945 pi->syscall_names[i] = NULL;
947 /* Read the syscall names in */
948 for (i = 0; i < header.pr_nsyscalls; i++)
950 char namebuf[MAX_SYSCALL_NAME_LENGTH];
954 if (syscalls[i].pr_number >= MAX_SYSCALLS
955 || syscalls[i].pr_number < 0
956 || syscalls[i].pr_nameoff <= 0
957 || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET)
958 != (off_t) syscalls[i].pr_nameoff))
961 nread = read (sysent_fd, namebuf, sizeof namebuf);
965 callnum = syscalls[i].pr_number;
967 if (pi->syscall_names[callnum] != NULL)
969 /* FIXME: Generate warning */
973 namebuf[nread-1] = '\0';
974 size = strlen (namebuf) + 1;
975 pi->syscall_names[callnum] = xmalloc (size);
976 strncpy (pi->syscall_names[callnum], namebuf, size-1);
977 pi->syscall_names[callnum][size-1] = '\0';
984 /* Function: free_syscalls
986 Free the space allocated for the syscall names from the procinfo
990 free_syscalls (procinfo *pi)
992 if (pi->syscall_names)
996 for (i = 0; i < pi->num_syscalls; i++)
997 if (pi->syscall_names[i] != NULL)
998 xfree (pi->syscall_names[i]);
1000 xfree (pi->syscall_names);
1001 pi->syscall_names = 0;
1005 /* Function: find_syscall
1007 Given a name, look up (and return) the corresponding syscall number.
1008 If no match is found, return -1. */
1011 find_syscall (procinfo *pi, char *name)
1014 for (i = 0; i < pi->num_syscalls; i++)
1016 if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0)
1023 /* =================== END, STRUCT PROCINFO "MODULE" =================== */
1025 /* =================== /proc "MODULE" =================== */
1028 * This "module" is the interface layer between the /proc system API
1029 * and the gdb target vector functions. This layer consists of
1030 * access functions that encapsulate each of the basic operations
1031 * that we need to use from the /proc API.
1033 * The main motivation for this layer is to hide the fact that
1034 * there are two very different implementations of the /proc API.
1035 * Rather than have a bunch of #ifdefs all thru the gdb target vector
1036 * functions, we do our best to hide them all in here.
1039 int proc_get_status (procinfo * pi);
1040 long proc_flags (procinfo * pi);
1041 int proc_why (procinfo * pi);
1042 int proc_what (procinfo * pi);
1043 int proc_set_run_on_last_close (procinfo * pi);
1044 int proc_unset_run_on_last_close (procinfo * pi);
1045 int proc_set_inherit_on_fork (procinfo * pi);
1046 int proc_unset_inherit_on_fork (procinfo * pi);
1047 int proc_set_async (procinfo * pi);
1048 int proc_unset_async (procinfo * pi);
1049 int proc_stop_process (procinfo * pi);
1050 int proc_trace_signal (procinfo * pi, int signo);
1051 int proc_ignore_signal (procinfo * pi, int signo);
1052 int proc_clear_current_fault (procinfo * pi);
1053 int proc_set_current_signal (procinfo * pi, int signo);
1054 int proc_clear_current_signal (procinfo * pi);
1055 int proc_set_gregs (procinfo * pi);
1056 int proc_set_fpregs (procinfo * pi);
1057 int proc_wait_for_stop (procinfo * pi);
1058 int proc_run_process (procinfo * pi, int step, int signo);
1059 int proc_kill (procinfo * pi, int signo);
1060 int proc_parent_pid (procinfo * pi);
1061 int proc_get_nthreads (procinfo * pi);
1062 int proc_get_current_thread (procinfo * pi);
1063 int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold);
1064 int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset);
1065 int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset);
1066 int proc_set_traced_faults (procinfo * pi, fltset_t * fltset);
1067 int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset);
1069 int proc_update_threads (procinfo * pi);
1070 int proc_iterate_over_threads (procinfo * pi,
1071 int (*func) (procinfo *, procinfo *, void *),
1074 gdb_gregset_t *proc_get_gregs (procinfo * pi);
1075 gdb_fpregset_t *proc_get_fpregs (procinfo * pi);
1076 sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save);
1077 sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save);
1078 fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save);
1079 gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save);
1080 gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save);
1081 gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save);
1082 gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save);
1084 void proc_warn (procinfo * pi, char *func, int line);
1085 void proc_error (procinfo * pi, char *func, int line);
1088 proc_warn (procinfo *pi, char *func, int line)
1090 sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
1091 print_sys_errmsg (errmsg, errno);
1095 proc_error (procinfo *pi, char *func, int line)
1097 sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
1098 perror_with_name (errmsg);
1102 * Function: proc_get_status
1104 * Updates the status struct in the procinfo.
1105 * There is a 'valid' flag, to let other functions know when
1106 * this function needs to be called (so the status is only
1107 * read when it is needed). The status file descriptor is
1108 * also only opened when it is needed.
1110 * Return: non-zero for success, zero for failure.
1114 proc_get_status (procinfo *pi)
1116 /* Status file descriptor is opened "lazily" */
1117 if (pi->status_fd == 0 &&
1118 open_procinfo_files (pi, FD_STATUS) == 0)
1120 pi->status_valid = 0;
1125 if (lseek (pi->status_fd, 0, SEEK_SET) < 0)
1126 pi->status_valid = 0; /* fail */
1129 /* Sigh... I have to read a different data structure,
1130 depending on whether this is a main process or an LWP. */
1132 pi->status_valid = (read (pi->status_fd,
1133 (char *) &pi->prstatus.pr_lwp,
1134 sizeof (lwpstatus_t))
1135 == sizeof (lwpstatus_t));
1138 pi->status_valid = (read (pi->status_fd,
1139 (char *) &pi->prstatus,
1140 sizeof (gdb_prstatus_t))
1141 == sizeof (gdb_prstatus_t));
1142 #if 0 /*def UNIXWARE*/
1143 if (pi->status_valid &&
1144 (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) &&
1145 pi->prstatus.pr_lwp.pr_why == PR_REQUESTED)
1146 /* Unixware peculiarity -- read the damn thing again! */
1147 pi->status_valid = (read (pi->status_fd,
1148 (char *) &pi->prstatus,
1149 sizeof (gdb_prstatus_t))
1150 == sizeof (gdb_prstatus_t));
1151 #endif /* UNIXWARE */
1154 #else /* ioctl method */
1155 #ifdef PIOCTSTATUS /* osf */
1156 if (pi->tid == 0) /* main process */
1158 /* Just read the danged status. Now isn't that simple? */
1160 (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
1167 tid_t pr_error_thread;
1168 struct prstatus status;
1171 thread_status.pr_count = 1;
1172 thread_status.status.pr_tid = pi->tid;
1173 win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0);
1176 memcpy (&pi->prstatus, &thread_status.status,
1177 sizeof (pi->prstatus));
1178 pi->status_valid = 1;
1182 /* Just read the danged status. Now isn't that simple? */
1183 pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
1187 if (pi->status_valid)
1189 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1192 proc_get_current_thread (pi));
1195 /* The status struct includes general regs, so mark them valid too */
1196 pi->gregs_valid = pi->status_valid;
1198 /* In the read/write multiple-fd model,
1199 the status struct includes the fp regs too, so mark them valid too */
1200 pi->fpregs_valid = pi->status_valid;
1202 return pi->status_valid; /* True if success, false if failure. */
1206 * Function: proc_flags
1208 * returns the process flags (pr_flags field).
1212 proc_flags (procinfo *pi)
1214 if (!pi->status_valid)
1215 if (!proc_get_status (pi))
1216 return 0; /* FIXME: not a good failure value (but what is?) */
1220 /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in
1221 pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t.
1222 The two sets of flags don't overlap. */
1223 return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags;
1225 return pi->prstatus.pr_lwp.pr_flags;
1228 return pi->prstatus.pr_flags;
1233 * Function: proc_why
1235 * returns the pr_why field (why the process stopped).
1239 proc_why (procinfo *pi)
1241 if (!pi->status_valid)
1242 if (!proc_get_status (pi))
1243 return 0; /* FIXME: not a good failure value (but what is?) */
1246 return pi->prstatus.pr_lwp.pr_why;
1248 return pi->prstatus.pr_why;
1253 * Function: proc_what
1255 * returns the pr_what field (details of why the process stopped).
1259 proc_what (procinfo *pi)
1261 if (!pi->status_valid)
1262 if (!proc_get_status (pi))
1263 return 0; /* FIXME: not a good failure value (but what is?) */
1266 return pi->prstatus.pr_lwp.pr_what;
1268 return pi->prstatus.pr_what;
1272 #ifndef PIOCSSPCACT /* The following is not supported on OSF. */
1274 * Function: proc_nsysarg
1276 * returns the pr_nsysarg field (number of args to the current syscall).
1280 proc_nsysarg (procinfo *pi)
1282 if (!pi->status_valid)
1283 if (!proc_get_status (pi))
1287 return pi->prstatus.pr_lwp.pr_nsysarg;
1289 return pi->prstatus.pr_nsysarg;
1294 * Function: proc_sysargs
1296 * returns the pr_sysarg field (pointer to the arguments of current syscall).
1300 proc_sysargs (procinfo *pi)
1302 if (!pi->status_valid)
1303 if (!proc_get_status (pi))
1307 return (long *) &pi->prstatus.pr_lwp.pr_sysarg;
1309 return (long *) &pi->prstatus.pr_sysarg;
1314 * Function: proc_syscall
1316 * returns the pr_syscall field (id of current syscall if we are in one).
1320 proc_syscall (procinfo *pi)
1322 if (!pi->status_valid)
1323 if (!proc_get_status (pi))
1327 return pi->prstatus.pr_lwp.pr_syscall;
1329 return pi->prstatus.pr_syscall;
1332 #endif /* PIOCSSPCACT */
1335 * Function: proc_cursig:
1337 * returns the pr_cursig field (current signal).
1341 proc_cursig (struct procinfo *pi)
1343 if (!pi->status_valid)
1344 if (!proc_get_status (pi))
1345 return 0; /* FIXME: not a good failure value (but what is?) */
1348 return pi->prstatus.pr_lwp.pr_cursig;
1350 return pi->prstatus.pr_cursig;
1355 * Function: proc_modify_flag
1357 * === I appologize for the messiness of this function.
1358 * === This is an area where the different versions of
1359 * === /proc are more inconsistent than usual. MVS
1361 * Set or reset any of the following process flags:
1362 * PR_FORK -- forked child will inherit trace flags
1363 * PR_RLC -- traced process runs when last /proc file closed.
1364 * PR_KLC -- traced process is killed when last /proc file closed.
1365 * PR_ASYNC -- LWP's get to run/stop independently.
1367 * There are three methods for doing this function:
1368 * 1) Newest: read/write [PCSET/PCRESET/PCUNSET]
1370 * 2) Middle: PIOCSET/PIOCRESET
1372 * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC
1375 * Note: Irix does not define PR_ASYNC.
1376 * Note: OSF does not define PR_KLC.
1377 * Note: OSF is the only one that can ONLY use the oldest method.
1380 * pi -- the procinfo
1381 * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC
1382 * mode -- 1 for set, 0 for reset.
1384 * Returns non-zero for success, zero for failure.
1387 enum { FLAG_RESET, FLAG_SET };
1390 proc_modify_flag (procinfo *pi, long flag, long mode)
1392 long win = 0; /* default to fail */
1395 * These operations affect the process as a whole, and applying
1396 * them to an individual LWP has the same meaning as applying them
1397 * to the main process. Therefore, if we're ever called with a
1398 * pointer to an LWP's procinfo, let's substitute the process's
1399 * procinfo and avoid opening the LWP's file descriptor
1404 pi = find_procinfo_or_die (pi->pid, 0);
1406 #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */
1407 /* First normalize the PCUNSET/PCRESET command opcode
1408 (which for no obvious reason has a different definition
1409 from one operating system to the next...) */
1411 #define GDBRESET PCUNSET
1414 #define GDBRESET PCRESET
1418 procfs_ctl_t arg[2];
1420 if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */
1422 else /* Reset the flag */
1426 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
1429 #ifdef PIOCSET /* Irix/Sol5 method */
1430 if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */
1432 win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0);
1434 else /* Reset the flag */
1436 win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0);
1440 #ifdef PIOCSRLC /* Oldest method: OSF */
1443 if (mode == FLAG_SET) /* Set run-on-last-close */
1445 win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0);
1447 else /* Clear run-on-last-close */
1449 win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0);
1453 if (mode == FLAG_SET) /* Set inherit-on-fork */
1455 win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0);
1457 else /* Clear inherit-on-fork */
1459 win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0);
1463 win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */
1470 /* The above operation renders the procinfo's cached pstatus obsolete. */
1471 pi->status_valid = 0;
1474 warning (_("procfs: modify_flag failed to turn %s %s"),
1475 flag == PR_FORK ? "PR_FORK" :
1476 flag == PR_RLC ? "PR_RLC" :
1478 flag == PR_ASYNC ? "PR_ASYNC" :
1481 flag == PR_KLC ? "PR_KLC" :
1484 mode == FLAG_RESET ? "off" : "on");
1490 * Function: proc_set_run_on_last_close
1492 * Set the run_on_last_close flag.
1493 * Process with all threads will become runnable
1494 * when debugger closes all /proc fds.
1496 * Returns non-zero for success, zero for failure.
1500 proc_set_run_on_last_close (procinfo *pi)
1502 return proc_modify_flag (pi, PR_RLC, FLAG_SET);
1506 * Function: proc_unset_run_on_last_close
1508 * Reset the run_on_last_close flag.
1509 * Process will NOT become runnable
1510 * when debugger closes its file handles.
1512 * Returns non-zero for success, zero for failure.
1516 proc_unset_run_on_last_close (procinfo *pi)
1518 return proc_modify_flag (pi, PR_RLC, FLAG_RESET);
1523 * Function: proc_set_kill_on_last_close
1525 * Set the kill_on_last_close flag.
1526 * Process with all threads will be killed when debugger
1527 * closes all /proc fds (or debugger exits or dies).
1529 * Returns non-zero for success, zero for failure.
1533 proc_set_kill_on_last_close (procinfo *pi)
1535 return proc_modify_flag (pi, PR_KLC, FLAG_SET);
1539 * Function: proc_unset_kill_on_last_close
1541 * Reset the kill_on_last_close flag.
1542 * Process will NOT be killed when debugger
1543 * closes its file handles (or exits or dies).
1545 * Returns non-zero for success, zero for failure.
1549 proc_unset_kill_on_last_close (procinfo *pi)
1551 return proc_modify_flag (pi, PR_KLC, FLAG_RESET);
1556 * Function: proc_set_inherit_on_fork
1558 * Set inherit_on_fork flag.
1559 * If the process forks a child while we are registered for events
1560 * in the parent, then we will also recieve events from the child.
1562 * Returns non-zero for success, zero for failure.
1566 proc_set_inherit_on_fork (procinfo *pi)
1568 return proc_modify_flag (pi, PR_FORK, FLAG_SET);
1572 * Function: proc_unset_inherit_on_fork
1574 * Reset inherit_on_fork flag.
1575 * If the process forks a child while we are registered for events
1576 * in the parent, then we will NOT recieve events from the child.
1578 * Returns non-zero for success, zero for failure.
1582 proc_unset_inherit_on_fork (procinfo *pi)
1584 return proc_modify_flag (pi, PR_FORK, FLAG_RESET);
1589 * Function: proc_set_async
1591 * Set PR_ASYNC flag.
1592 * If one LWP stops because of a debug event (signal etc.),
1593 * the remaining LWPs will continue to run.
1595 * Returns non-zero for success, zero for failure.
1599 proc_set_async (procinfo *pi)
1601 return proc_modify_flag (pi, PR_ASYNC, FLAG_SET);
1605 * Function: proc_unset_async
1607 * Reset PR_ASYNC flag.
1608 * If one LWP stops because of a debug event (signal etc.),
1609 * then all other LWPs will stop as well.
1611 * Returns non-zero for success, zero for failure.
1615 proc_unset_async (procinfo *pi)
1617 return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET);
1619 #endif /* PR_ASYNC */
1622 * Function: proc_stop_process
1624 * Request the process/LWP to stop. Does not wait.
1625 * Returns non-zero for success, zero for failure.
1629 proc_stop_process (procinfo *pi)
1634 * We might conceivably apply this operation to an LWP, and
1635 * the LWP's ctl file descriptor might not be open.
1638 if (pi->ctl_fd == 0 &&
1639 open_procinfo_files (pi, FD_CTL) == 0)
1644 procfs_ctl_t cmd = PCSTOP;
1645 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1646 #else /* ioctl method */
1647 win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0);
1648 /* Note: the call also reads the prstatus. */
1651 pi->status_valid = 1;
1652 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1655 proc_get_current_thread (pi));
1664 * Function: proc_wait_for_stop
1666 * Wait for the process or LWP to stop (block until it does).
1667 * Returns non-zero for success, zero for failure.
1671 proc_wait_for_stop (procinfo *pi)
1676 * We should never have to apply this operation to any procinfo
1677 * except the one for the main process. If that ever changes
1678 * for any reason, then take out the following clause and
1679 * replace it with one that makes sure the ctl_fd is open.
1683 pi = find_procinfo_or_die (pi->pid, 0);
1687 procfs_ctl_t cmd = PCWSTOP;
1688 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1689 /* We been runnin' and we stopped -- need to update status. */
1690 pi->status_valid = 0;
1692 #else /* ioctl method */
1693 win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0);
1694 /* Above call also refreshes the prstatus. */
1697 pi->status_valid = 1;
1698 PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
1701 proc_get_current_thread (pi));
1709 * Function: proc_run_process
1711 * Make the process or LWP runnable.
1712 * Options (not all are implemented):
1714 * - clear current fault
1715 * - clear current signal
1716 * - abort the current system call
1717 * - stop as soon as finished with system call
1718 * - (ioctl): set traced signal set
1719 * - (ioctl): set held signal set
1720 * - (ioctl): set traced fault set
1721 * - (ioctl): set start pc (vaddr)
1722 * Always clear the current fault.
1723 * Clear the current signal if 'signo' is zero.
1726 * pi the process or LWP to operate on.
1727 * step if true, set the process or LWP to trap after one instr.
1728 * signo if zero, clear the current signal if any.
1729 * if non-zero, set the current signal to this one.
1731 * Returns non-zero for success, zero for failure.
1735 proc_run_process (procinfo *pi, int step, int signo)
1741 * We will probably have to apply this operation to individual threads,
1742 * so make sure the control file descriptor is open.
1745 if (pi->ctl_fd == 0 &&
1746 open_procinfo_files (pi, FD_CTL) == 0)
1751 runflags = PRCFAULT; /* always clear current fault */
1756 else if (signo != -1) /* -1 means do nothing W.R.T. signals */
1757 proc_set_current_signal (pi, signo);
1761 procfs_ctl_t cmd[2];
1765 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
1767 #else /* ioctl method */
1771 memset (&prrun, 0, sizeof (prrun));
1772 prrun.pr_flags = runflags;
1773 win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0);
1781 * Function: proc_set_traced_signals
1783 * Register to trace signals in the process or LWP.
1784 * Returns non-zero for success, zero for failure.
1788 proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset)
1793 * We should never have to apply this operation to any procinfo
1794 * except the one for the main process. If that ever changes
1795 * for any reason, then take out the following clause and
1796 * replace it with one that makes sure the ctl_fd is open.
1800 pi = find_procinfo_or_die (pi->pid, 0);
1806 /* Use char array to avoid alignment issues. */
1807 char sigset[sizeof (gdb_sigset_t)];
1811 memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t));
1813 win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
1815 #else /* ioctl method */
1816 win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0);
1818 /* The above operation renders the procinfo's cached pstatus obsolete. */
1819 pi->status_valid = 0;
1822 warning (_("procfs: set_traced_signals failed"));
1827 * Function: proc_set_traced_faults
1829 * Register to trace hardware faults in the process or LWP.
1830 * Returns non-zero for success, zero for failure.
1834 proc_set_traced_faults (procinfo *pi, fltset_t *fltset)
1839 * We should never have to apply this operation to any procinfo
1840 * except the one for the main process. If that ever changes
1841 * for any reason, then take out the following clause and
1842 * replace it with one that makes sure the ctl_fd is open.
1846 pi = find_procinfo_or_die (pi->pid, 0);
1852 /* Use char array to avoid alignment issues. */
1853 char fltset[sizeof (fltset_t)];
1857 memcpy (&arg.fltset, fltset, sizeof (fltset_t));
1859 win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
1861 #else /* ioctl method */
1862 win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0);
1864 /* The above operation renders the procinfo's cached pstatus obsolete. */
1865 pi->status_valid = 0;
1871 * Function: proc_set_traced_sysentry
1873 * Register to trace entry to system calls in the process or LWP.
1874 * Returns non-zero for success, zero for failure.
1878 proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset)
1883 * We should never have to apply this operation to any procinfo
1884 * except the one for the main process. If that ever changes
1885 * for any reason, then take out the following clause and
1886 * replace it with one that makes sure the ctl_fd is open.
1890 pi = find_procinfo_or_die (pi->pid, 0);
1894 struct gdb_proc_ctl_pcsentry {
1896 /* Use char array to avoid alignment issues. */
1897 char sysset[sizeof (sysset_t)];
1899 int argp_size = sizeof (struct gdb_proc_ctl_pcsentry)
1901 + sysset_t_size (pi);
1903 argp = xmalloc (argp_size);
1905 argp->cmd = PCSENTRY;
1906 memcpy (&argp->sysset, sysset, sysset_t_size (pi));
1908 win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
1911 #else /* ioctl method */
1912 win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0);
1914 /* The above operation renders the procinfo's cached pstatus obsolete. */
1915 pi->status_valid = 0;
1921 * Function: proc_set_traced_sysexit
1923 * Register to trace exit from system calls in the process or LWP.
1924 * Returns non-zero for success, zero for failure.
1928 proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset)
1933 * We should never have to apply this operation to any procinfo
1934 * except the one for the main process. If that ever changes
1935 * for any reason, then take out the following clause and
1936 * replace it with one that makes sure the ctl_fd is open.
1940 pi = find_procinfo_or_die (pi->pid, 0);
1944 struct gdb_proc_ctl_pcsexit {
1946 /* Use char array to avoid alignment issues. */
1947 char sysset[sizeof (sysset_t)];
1949 int argp_size = sizeof (struct gdb_proc_ctl_pcsexit)
1951 + sysset_t_size (pi);
1953 argp = xmalloc (argp_size);
1955 argp->cmd = PCSEXIT;
1956 memcpy (&argp->sysset, sysset, sysset_t_size (pi));
1958 win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
1961 #else /* ioctl method */
1962 win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0);
1964 /* The above operation renders the procinfo's cached pstatus obsolete. */
1965 pi->status_valid = 0;
1971 * Function: proc_set_held_signals
1973 * Specify the set of blocked / held signals in the process or LWP.
1974 * Returns non-zero for success, zero for failure.
1978 proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold)
1983 * We should never have to apply this operation to any procinfo
1984 * except the one for the main process. If that ever changes
1985 * for any reason, then take out the following clause and
1986 * replace it with one that makes sure the ctl_fd is open.
1990 pi = find_procinfo_or_die (pi->pid, 0);
1996 /* Use char array to avoid alignment issues. */
1997 char hold[sizeof (gdb_sigset_t)];
2001 memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t));
2002 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2005 win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0);
2007 /* The above operation renders the procinfo's cached pstatus obsolete. */
2008 pi->status_valid = 0;
2014 * Function: proc_get_pending_signals
2016 * returns the set of signals that are pending in the process or LWP.
2017 * Will also copy the sigset if 'save' is non-zero.
2021 proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save)
2023 gdb_sigset_t *ret = NULL;
2026 * We should never have to apply this operation to any procinfo
2027 * except the one for the main process. If that ever changes
2028 * for any reason, then take out the following clause and
2029 * replace it with one that makes sure the ctl_fd is open.
2033 pi = find_procinfo_or_die (pi->pid, 0);
2035 if (!pi->status_valid)
2036 if (!proc_get_status (pi))
2040 ret = &pi->prstatus.pr_lwp.pr_lwppend;
2042 ret = &pi->prstatus.pr_sigpend;
2045 memcpy (save, ret, sizeof (gdb_sigset_t));
2051 * Function: proc_get_signal_actions
2053 * returns the set of signal actions.
2054 * Will also copy the sigactionset if 'save' is non-zero.
2058 proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save)
2060 gdb_sigaction_t *ret = NULL;
2063 * We should never have to apply this operation to any procinfo
2064 * except the one for the main process. If that ever changes
2065 * for any reason, then take out the following clause and
2066 * replace it with one that makes sure the ctl_fd is open.
2070 pi = find_procinfo_or_die (pi->pid, 0);
2072 if (!pi->status_valid)
2073 if (!proc_get_status (pi))
2077 ret = &pi->prstatus.pr_lwp.pr_action;
2079 ret = &pi->prstatus.pr_action;
2082 memcpy (save, ret, sizeof (gdb_sigaction_t));
2088 * Function: proc_get_held_signals
2090 * returns the set of signals that are held / blocked.
2091 * Will also copy the sigset if 'save' is non-zero.
2095 proc_get_held_signals (procinfo *pi, gdb_sigset_t *save)
2097 gdb_sigset_t *ret = NULL;
2100 * We should never have to apply this operation to any procinfo
2101 * except the one for the main process. If that ever changes
2102 * for any reason, then take out the following clause and
2103 * replace it with one that makes sure the ctl_fd is open.
2107 pi = find_procinfo_or_die (pi->pid, 0);
2110 if (!pi->status_valid)
2111 if (!proc_get_status (pi))
2115 ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask;
2117 ret = &pi->prstatus.pr_lwp.pr_lwphold;
2118 #endif /* UNIXWARE */
2119 #else /* not NEW_PROC_API */
2121 static gdb_sigset_t sigheld;
2123 if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0)
2126 #endif /* NEW_PROC_API */
2128 memcpy (save, ret, sizeof (gdb_sigset_t));
2134 * Function: proc_get_traced_signals
2136 * returns the set of signals that are traced / debugged.
2137 * Will also copy the sigset if 'save' is non-zero.
2141 proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save)
2143 gdb_sigset_t *ret = NULL;
2146 * We should never have to apply this operation to any procinfo
2147 * except the one for the main process. If that ever changes
2148 * for any reason, then take out the following clause and
2149 * replace it with one that makes sure the ctl_fd is open.
2153 pi = find_procinfo_or_die (pi->pid, 0);
2156 if (!pi->status_valid)
2157 if (!proc_get_status (pi))
2160 ret = &pi->prstatus.pr_sigtrace;
2163 static gdb_sigset_t sigtrace;
2165 if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0)
2170 memcpy (save, ret, sizeof (gdb_sigset_t));
2176 * Function: proc_trace_signal
2178 * Add 'signo' to the set of signals that are traced.
2179 * Returns non-zero for success, zero for failure.
2183 proc_trace_signal (procinfo *pi, int signo)
2188 * We should never have to apply this operation to any procinfo
2189 * except the one for the main process. If that ever changes
2190 * for any reason, then take out the following clause and
2191 * replace it with one that makes sure the ctl_fd is open.
2195 pi = find_procinfo_or_die (pi->pid, 0);
2199 if (proc_get_traced_signals (pi, &temp))
2201 praddset (&temp, signo);
2202 return proc_set_traced_signals (pi, &temp);
2206 return 0; /* failure */
2210 * Function: proc_ignore_signal
2212 * Remove 'signo' from the set of signals that are traced.
2213 * Returns non-zero for success, zero for failure.
2217 proc_ignore_signal (procinfo *pi, int signo)
2222 * We should never have to apply this operation to any procinfo
2223 * except the one for the main process. If that ever changes
2224 * for any reason, then take out the following clause and
2225 * replace it with one that makes sure the ctl_fd is open.
2229 pi = find_procinfo_or_die (pi->pid, 0);
2233 if (proc_get_traced_signals (pi, &temp))
2235 prdelset (&temp, signo);
2236 return proc_set_traced_signals (pi, &temp);
2240 return 0; /* failure */
2244 * Function: proc_get_traced_faults
2246 * returns the set of hardware faults that are traced /debugged.
2247 * Will also copy the faultset if 'save' is non-zero.
2251 proc_get_traced_faults (procinfo *pi, fltset_t *save)
2253 fltset_t *ret = NULL;
2256 * We should never have to apply this operation to any procinfo
2257 * except the one for the main process. If that ever changes
2258 * for any reason, then take out the following clause and
2259 * replace it with one that makes sure the ctl_fd is open.
2263 pi = find_procinfo_or_die (pi->pid, 0);
2266 if (!pi->status_valid)
2267 if (!proc_get_status (pi))
2270 ret = &pi->prstatus.pr_flttrace;
2273 static fltset_t flttrace;
2275 if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0)
2280 memcpy (save, ret, sizeof (fltset_t));
2286 * Function: proc_get_traced_sysentry
2288 * returns the set of syscalls that are traced /debugged on entry.
2289 * Will also copy the syscall set if 'save' is non-zero.
2293 proc_get_traced_sysentry (procinfo *pi, sysset_t *save)
2295 sysset_t *ret = NULL;
2298 * We should never have to apply this operation to any procinfo
2299 * except the one for the main process. If that ever changes
2300 * for any reason, then take out the following clause and
2301 * replace it with one that makes sure the ctl_fd is open.
2305 pi = find_procinfo_or_die (pi->pid, 0);
2308 if (!pi->status_valid)
2309 if (!proc_get_status (pi))
2312 #ifndef DYNAMIC_SYSCALLS
2313 ret = &pi->prstatus.pr_sysentry;
2314 #else /* DYNAMIC_SYSCALLS */
2316 static sysset_t *sysentry;
2320 sysentry = sysset_t_alloc (pi);
2322 if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
2324 if (pi->prstatus.pr_sysentry_offset == 0)
2326 gdb_premptysysset (sysentry);
2332 if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset,
2334 != (off_t) pi->prstatus.pr_sysentry_offset)
2336 size = sysset_t_size (pi);
2337 gdb_premptysysset (sysentry);
2338 rsize = read (pi->status_fd, sysentry, size);
2343 #endif /* DYNAMIC_SYSCALLS */
2344 #else /* !NEW_PROC_API */
2346 static sysset_t sysentry;
2348 if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0)
2351 #endif /* NEW_PROC_API */
2353 memcpy (save, ret, sysset_t_size (pi));
2359 * Function: proc_get_traced_sysexit
2361 * returns the set of syscalls that are traced /debugged on exit.
2362 * Will also copy the syscall set if 'save' is non-zero.
2366 proc_get_traced_sysexit (procinfo *pi, sysset_t *save)
2368 sysset_t * ret = NULL;
2371 * We should never have to apply this operation to any procinfo
2372 * except the one for the main process. If that ever changes
2373 * for any reason, then take out the following clause and
2374 * replace it with one that makes sure the ctl_fd is open.
2378 pi = find_procinfo_or_die (pi->pid, 0);
2381 if (!pi->status_valid)
2382 if (!proc_get_status (pi))
2385 #ifndef DYNAMIC_SYSCALLS
2386 ret = &pi->prstatus.pr_sysexit;
2387 #else /* DYNAMIC_SYSCALLS */
2389 static sysset_t *sysexit;
2393 sysexit = sysset_t_alloc (pi);
2395 if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
2397 if (pi->prstatus.pr_sysexit_offset == 0)
2399 gdb_premptysysset (sysexit);
2405 if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET)
2406 != (off_t) pi->prstatus.pr_sysexit_offset)
2408 size = sysset_t_size (pi);
2409 gdb_premptysysset (sysexit);
2410 rsize = read (pi->status_fd, sysexit, size);
2415 #endif /* DYNAMIC_SYSCALLS */
2418 static sysset_t sysexit;
2420 if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0)
2425 memcpy (save, ret, sysset_t_size (pi));
2431 * Function: proc_clear_current_fault
2433 * The current fault (if any) is cleared; the associated signal
2434 * will not be sent to the process or LWP when it resumes.
2435 * Returns non-zero for success, zero for failure.
2439 proc_clear_current_fault (procinfo *pi)
2444 * We should never have to apply this operation to any procinfo
2445 * except the one for the main process. If that ever changes
2446 * for any reason, then take out the following clause and
2447 * replace it with one that makes sure the ctl_fd is open.
2451 pi = find_procinfo_or_die (pi->pid, 0);
2455 procfs_ctl_t cmd = PCCFAULT;
2456 win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd));
2459 win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0);
2466 * Function: proc_set_current_signal
2468 * Set the "current signal" that will be delivered next to the process.
2469 * NOTE: semantics are different from those of KILL.
2470 * This signal will be delivered to the process or LWP
2471 * immediately when it is resumed (even if the signal is held/blocked);
2472 * it will NOT immediately cause another event of interest, and will NOT
2473 * first trap back to the debugger.
2475 * Returns non-zero for success, zero for failure.
2479 proc_set_current_signal (procinfo *pi, int signo)
2484 /* Use char array to avoid alignment issues. */
2485 char sinfo[sizeof (gdb_siginfo_t)];
2487 gdb_siginfo_t *mysinfo;
2489 struct target_waitstatus wait_status;
2492 * We should never have to apply this operation to any procinfo
2493 * except the one for the main process. If that ever changes
2494 * for any reason, then take out the following clause and
2495 * replace it with one that makes sure the ctl_fd is open.
2499 pi = find_procinfo_or_die (pi->pid, 0);
2501 #ifdef PROCFS_DONT_PIOCSSIG_CURSIG
2502 /* With Alpha OSF/1 procfs, the kernel gets really confused if it
2503 * receives a PIOCSSIG with a signal identical to the current signal,
2504 * it messes up the current signal. Work around the kernel bug.
2507 signo == proc_cursig (pi))
2508 return 1; /* I assume this is a success? */
2511 /* The pointer is just a type alias. */
2512 mysinfo = (gdb_siginfo_t *) &arg.sinfo;
2513 get_last_target_status (&wait_ptid, &wait_status);
2514 if (ptid_equal (wait_ptid, inferior_ptid)
2515 && wait_status.kind == TARGET_WAITKIND_STOPPED
2516 && wait_status.value.sig == target_signal_from_host (signo)
2517 && proc_get_status (pi)
2519 && pi->prstatus.pr_lwp.pr_info.si_signo == signo
2521 && pi->prstatus.pr_info.si_signo == signo
2524 /* Use the siginfo associated with the signal being
2527 memcpy (mysinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t));
2529 memcpy (mysinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t));
2533 mysinfo->si_signo = signo;
2534 mysinfo->si_code = 0;
2535 mysinfo->si_pid = getpid (); /* ?why? */
2536 mysinfo->si_uid = getuid (); /* ?why? */
2541 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2543 win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0);
2550 * Function: proc_clear_current_signal
2552 * The current signal (if any) is cleared, and
2553 * is not sent to the process or LWP when it resumes.
2554 * Returns non-zero for success, zero for failure.
2558 proc_clear_current_signal (procinfo *pi)
2563 * We should never have to apply this operation to any procinfo
2564 * except the one for the main process. If that ever changes
2565 * for any reason, then take out the following clause and
2566 * replace it with one that makes sure the ctl_fd is open.
2570 pi = find_procinfo_or_die (pi->pid, 0);
2576 /* Use char array to avoid alignment issues. */
2577 char sinfo[sizeof (gdb_siginfo_t)];
2579 gdb_siginfo_t *mysinfo;
2582 /* The pointer is just a type alias. */
2583 mysinfo = (gdb_siginfo_t *) &arg.sinfo;
2584 mysinfo->si_signo = 0;
2585 mysinfo->si_code = 0;
2586 mysinfo->si_errno = 0;
2587 mysinfo->si_pid = getpid (); /* ?why? */
2588 mysinfo->si_uid = getuid (); /* ?why? */
2590 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2593 win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0);
2599 /* Return the general-purpose registers for the process or LWP
2600 corresponding to PI. Upon failure, return NULL. */
2603 proc_get_gregs (procinfo *pi)
2605 if (!pi->status_valid || !pi->gregs_valid)
2606 if (!proc_get_status (pi))
2609 /* OK, sorry about the ifdef's. There's three cases instead of two,
2610 because in this case Unixware and Solaris/RW differ. */
2613 # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */
2614 return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs;
2616 return &pi->prstatus.pr_lwp.pr_reg;
2619 return &pi->prstatus.pr_reg;
2623 /* Return the general-purpose registers for the process or LWP
2624 corresponding to PI. Upon failure, return NULL. */
2627 proc_get_fpregs (procinfo *pi)
2630 if (!pi->status_valid || !pi->fpregs_valid)
2631 if (!proc_get_status (pi))
2634 # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */
2635 return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs;
2637 return &pi->prstatus.pr_lwp.pr_fpreg;
2640 #else /* not NEW_PROC_API */
2641 if (pi->fpregs_valid)
2642 return &pi->fpregset; /* Already got 'em. */
2645 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2654 tid_t pr_error_thread;
2655 tfpregset_t thread_1;
2658 thread_fpregs.pr_count = 1;
2659 thread_fpregs.thread_1.tid = pi->tid;
2662 && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
2664 pi->fpregs_valid = 1;
2665 return &pi->fpregset; /* Got 'em now! */
2667 else if (pi->tid != 0
2668 && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0)
2670 memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs,
2671 sizeof (pi->fpregset));
2672 pi->fpregs_valid = 1;
2673 return &pi->fpregset; /* Got 'em now! */
2680 if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
2682 pi->fpregs_valid = 1;
2683 return &pi->fpregset; /* Got 'em now! */
2692 #endif /* NEW_PROC_API */
2695 /* Write the general-purpose registers back to the process or LWP
2696 corresponding to PI. Return non-zero for success, zero for
2700 proc_set_gregs (procinfo *pi)
2702 gdb_gregset_t *gregs;
2705 gregs = proc_get_gregs (pi);
2707 return 0; /* proc_get_regs has already warned. */
2709 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2718 /* Use char array to avoid alignment issues. */
2719 char gregs[sizeof (gdb_gregset_t)];
2723 memcpy (&arg.gregs, gregs, sizeof (arg.gregs));
2724 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2726 win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0);
2730 /* Policy: writing the registers invalidates our cache. */
2731 pi->gregs_valid = 0;
2735 /* Write the floating-pointer registers back to the process or LWP
2736 corresponding to PI. Return non-zero for success, zero for
2740 proc_set_fpregs (procinfo *pi)
2742 gdb_fpregset_t *fpregs;
2745 fpregs = proc_get_fpregs (pi);
2747 return 0; /* proc_get_fpregs has already warned. */
2749 if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
2758 /* Use char array to avoid alignment issues. */
2759 char fpregs[sizeof (gdb_fpregset_t)];
2763 memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs));
2764 win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
2768 win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
2773 tid_t pr_error_thread;
2774 tfpregset_t thread_1;
2777 thread_fpregs.pr_count = 1;
2778 thread_fpregs.thread_1.tid = pi->tid;
2779 memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs,
2781 win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0);
2784 win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
2786 #endif /* NEW_PROC_API */
2789 /* Policy: writing the registers invalidates our cache. */
2790 pi->fpregs_valid = 0;
2795 * Function: proc_kill
2797 * Send a signal to the proc or lwp with the semantics of "kill()".
2798 * Returns non-zero for success, zero for failure.
2802 proc_kill (procinfo *pi, int signo)
2807 * We might conceivably apply this operation to an LWP, and
2808 * the LWP's ctl file descriptor might not be open.
2811 if (pi->ctl_fd == 0 &&
2812 open_procinfo_files (pi, FD_CTL) == 0)
2819 procfs_ctl_t cmd[2];
2823 win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
2824 #else /* ioctl method */
2825 /* FIXME: do I need the Alpha OSF fixups present in
2826 procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */
2827 win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0);
2835 * Function: proc_parent_pid
2837 * Find the pid of the process that started this one.
2838 * Returns the parent process pid, or zero.
2842 proc_parent_pid (procinfo *pi)
2845 * We should never have to apply this operation to any procinfo
2846 * except the one for the main process. If that ever changes
2847 * for any reason, then take out the following clause and
2848 * replace it with one that makes sure the ctl_fd is open.
2852 pi = find_procinfo_or_die (pi->pid, 0);
2854 if (!pi->status_valid)
2855 if (!proc_get_status (pi))
2858 return pi->prstatus.pr_ppid;
2862 /* Convert a target address (a.k.a. CORE_ADDR) into a host address
2863 (a.k.a void pointer)! */
2866 procfs_address_to_host_pointer (CORE_ADDR addr)
2870 gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr));
2871 gdbarch_address_to_pointer (current_gdbarch, builtin_type_void_data_ptr,
2877 * Function: proc_set_watchpoint
2882 proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags)
2884 #if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS)
2887 /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */
2888 #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */
2893 char watch[sizeof (prwatch_t)];
2897 pwatch = (prwatch_t *) &arg.watch;
2898 /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to
2899 convert a target address into something that can be stored in a
2900 native data structure. */
2901 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
2902 pwatch->pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr);
2904 pwatch->pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr);
2906 pwatch->pr_size = len;
2907 pwatch->pr_wflags = wflags;
2908 #if defined(NEW_PROC_API) && defined (PCWATCH)
2910 return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg));
2912 #if defined (PIOCSWATCH)
2913 return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0);
2915 return 0; /* Fail */
2922 #ifdef TM_I386SOL2_H /* Is it hokey to use this? */
2924 #include <sys/sysi86.h>
2927 * Function: proc_get_LDT_entry
2933 * The 'key' is actually the value of the lower 16 bits of
2934 * the GS register for the LWP that we're interested in.
2936 * Return: matching ssh struct (LDT entry).
2940 proc_get_LDT_entry (procinfo *pi, int key)
2942 static struct ssd *ldt_entry = NULL;
2944 char pathname[MAX_PROC_NAME_SIZE];
2945 struct cleanup *old_chain = NULL;
2948 /* Allocate space for one LDT entry.
2949 This alloc must persist, because we return a pointer to it. */
2950 if (ldt_entry == NULL)
2951 ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd));
2953 /* Open the file descriptor for the LDT table. */
2954 sprintf (pathname, "/proc/%d/ldt", pi->pid);
2955 if ((fd = open_with_retry (pathname, O_RDONLY)) < 0)
2957 proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__);
2960 /* Make sure it gets closed again! */
2961 old_chain = make_cleanup_close (fd);
2963 /* Now 'read' thru the table, find a match and return it. */
2964 while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd))
2966 if (ldt_entry->sel == 0 &&
2967 ldt_entry->bo == 0 &&
2968 ldt_entry->acc1 == 0 &&
2969 ldt_entry->acc2 == 0)
2970 break; /* end of table */
2971 /* If key matches, return this entry. */
2972 if (ldt_entry->sel == key)
2975 /* Loop ended, match not found. */
2979 static int nalloc = 0;
2981 /* Get the number of LDT entries. */
2982 if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0)
2984 proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__);
2988 /* Allocate space for the number of LDT entries. */
2989 /* This alloc has to persist, 'cause we return a pointer to it. */
2992 ldt_entry = (struct ssd *)
2993 xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd));
2997 /* Read the whole table in one gulp. */
2998 if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0)
3000 proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__);
3004 /* Search the table and return the (first) entry matching 'key'. */
3005 for (i = 0; i < nldt; i++)
3006 if (ldt_entry[i].sel == key)
3007 return &ldt_entry[i];
3009 /* Loop ended, match not found. */
3014 #endif /* TM_I386SOL2_H */
3016 /* =============== END, non-thread part of /proc "MODULE" =============== */
3018 /* =================== Thread "MODULE" =================== */
3020 /* NOTE: you'll see more ifdefs and duplication of functions here,
3021 since there is a different way to do threads on every OS. */
3024 * Function: proc_get_nthreads
3026 * Return the number of threads for the process
3029 #if defined (PIOCNTHR) && defined (PIOCTLIST)
3034 proc_get_nthreads (procinfo *pi)
3038 if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0)
3039 proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__);
3045 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
3047 * Solaris and Unixware version
3050 proc_get_nthreads (procinfo *pi)
3052 if (!pi->status_valid)
3053 if (!proc_get_status (pi))
3057 * NEW_PROC_API: only works for the process procinfo,
3058 * because the LWP procinfos do not get prstatus filled in.
3061 if (pi->tid != 0) /* find the parent process procinfo */
3062 pi = find_procinfo_or_die (pi->pid, 0);
3064 return pi->prstatus.pr_nlwp;
3072 proc_get_nthreads (procinfo *pi)
3080 * Function: proc_get_current_thread (LWP version)
3082 * Return the ID of the thread that had an event of interest.
3083 * (ie. the one that hit a breakpoint or other traced event).
3084 * All other things being equal, this should be the ID of a
3085 * thread that is currently executing.
3088 #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
3090 * Solaris and Unixware version
3093 proc_get_current_thread (procinfo *pi)
3096 * Note: this should be applied to the root procinfo for the process,
3097 * not to the procinfo for an LWP. If applied to the procinfo for
3098 * an LWP, it will simply return that LWP's ID. In that case,
3099 * find the parent process procinfo.
3103 pi = find_procinfo_or_die (pi->pid, 0);
3105 if (!pi->status_valid)
3106 if (!proc_get_status (pi))
3110 return pi->prstatus.pr_lwp.pr_lwpid;
3112 return pi->prstatus.pr_who;
3117 #if defined (PIOCNTHR) && defined (PIOCTLIST)
3122 proc_get_current_thread (procinfo *pi)
3124 #if 0 /* FIXME: not ready for prime time? */
3125 return pi->prstatus.pr_tid;
3136 proc_get_current_thread (procinfo *pi)
3145 * Function: proc_update_threads
3147 * Discover the IDs of all the threads within the process, and
3148 * create a procinfo for each of them (chained to the parent).
3150 * This unfortunately requires a different method on every OS.
3152 * Return: non-zero for success, zero for failure.
3156 proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore)
3158 if (thread && parent) /* sanity */
3160 thread->status_valid = 0;
3161 if (!proc_get_status (thread))
3162 destroy_one_procinfo (&parent->thread_list, thread);
3164 return 0; /* keep iterating */
3167 #if defined (PIOCLSTATUS)
3169 * Solaris 2.5 (ioctl) version
3172 proc_update_threads (procinfo *pi)
3174 gdb_prstatus_t *prstatus;
3175 struct cleanup *old_chain = NULL;
3180 * We should never have to apply this operation to any procinfo
3181 * except the one for the main process. If that ever changes
3182 * for any reason, then take out the following clause and
3183 * replace it with one that makes sure the ctl_fd is open.
3187 pi = find_procinfo_or_die (pi->pid, 0);
3189 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
3191 if ((nlwp = proc_get_nthreads (pi)) <= 1)
3192 return 1; /* Process is not multi-threaded; nothing to do. */
3194 prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1));
3196 old_chain = make_cleanup (xfree, prstatus);
3197 if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0)
3198 proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__);
3200 /* Skip element zero, which represents the process as a whole. */
3201 for (i = 1; i < nlwp + 1; i++)
3203 if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL)
3204 proc_error (pi, "update_threads, create_procinfo", __LINE__);
3206 memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus));
3207 thread->status_valid = 1;
3209 pi->threads_valid = 1;
3210 do_cleanups (old_chain);
3216 * Unixware and Solaris 6 (and later) version
3219 do_closedir_cleanup (void *dir)
3225 proc_update_threads (procinfo *pi)
3227 char pathname[MAX_PROC_NAME_SIZE + 16];
3228 struct dirent *direntry;
3229 struct cleanup *old_chain = NULL;
3235 * We should never have to apply this operation to any procinfo
3236 * except the one for the main process. If that ever changes
3237 * for any reason, then take out the following clause and
3238 * replace it with one that makes sure the ctl_fd is open.
3242 pi = find_procinfo_or_die (pi->pid, 0);
3244 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
3249 * Note: this brute-force method is the only way I know of
3250 * to accomplish this task on Unixware. This method will
3251 * also work on Solaris 2.6 and 2.7. There is a much simpler
3252 * and more elegant way to do this on Solaris, but the margins
3253 * of this manuscript are too small to write it here... ;-)
3256 strcpy (pathname, pi->pathname);
3257 strcat (pathname, "/lwp");
3258 if ((dirp = opendir (pathname)) == NULL)
3259 proc_error (pi, "update_threads, opendir", __LINE__);
3261 old_chain = make_cleanup (do_closedir_cleanup, dirp);
3262 while ((direntry = readdir (dirp)) != NULL)
3263 if (direntry->d_name[0] != '.') /* skip '.' and '..' */
3265 lwpid = atoi (&direntry->d_name[0]);
3266 if ((thread = create_procinfo (pi->pid, lwpid)) == NULL)
3267 proc_error (pi, "update_threads, create_procinfo", __LINE__);
3269 pi->threads_valid = 1;
3270 do_cleanups (old_chain);
3279 proc_update_threads (procinfo *pi)
3285 * We should never have to apply this operation to any procinfo
3286 * except the one for the main process. If that ever changes
3287 * for any reason, then take out the following clause and
3288 * replace it with one that makes sure the ctl_fd is open.
3292 pi = find_procinfo_or_die (pi->pid, 0);
3294 proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
3296 nthreads = proc_get_nthreads (pi);
3298 return 0; /* nothing to do for 1 or fewer threads */
3300 threads = xmalloc (nthreads * sizeof (tid_t));
3302 if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0)
3303 proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__);
3305 for (i = 0; i < nthreads; i++)
3307 if (!find_procinfo (pi->pid, threads[i]))
3308 if (!create_procinfo (pi->pid, threads[i]))
3309 proc_error (pi, "update_threads, create_procinfo", __LINE__);
3311 pi->threads_valid = 1;
3319 proc_update_threads (procinfo *pi)
3323 #endif /* OSF PIOCTLIST */
3324 #endif /* NEW_PROC_API */
3325 #endif /* SOL 2.5 PIOCLSTATUS */
3328 * Function: proc_iterate_over_threads
3331 * Given a pointer to a function, call that function once
3332 * for each lwp in the procinfo list, until the function
3333 * returns non-zero, in which event return the value
3334 * returned by the function.
3336 * Note: this function does NOT call update_threads.
3337 * If you want to discover new threads first, you must
3338 * call that function explicitly. This function just makes
3339 * a quick pass over the currently-known procinfos.
3342 * pi - parent process procinfo
3343 * func - per-thread function
3344 * ptr - opaque parameter for function.
3347 * First non-zero return value from the callee, or zero.
3351 proc_iterate_over_threads (procinfo *pi,
3352 int (*func) (procinfo *, procinfo *, void *),
3355 procinfo *thread, *next;
3359 * We should never have to apply this operation to any procinfo
3360 * except the one for the main process. If that ever changes
3361 * for any reason, then take out the following clause and
3362 * replace it with one that makes sure the ctl_fd is open.
3366 pi = find_procinfo_or_die (pi->pid, 0);
3368 for (thread = pi->thread_list; thread != NULL; thread = next)
3370 next = thread->next; /* in case thread is destroyed */
3371 if ((retval = (*func) (pi, thread, ptr)) != 0)
3378 /* =================== END, Thread "MODULE" =================== */
3380 /* =================== END, /proc "MODULE" =================== */
3382 /* =================== GDB "MODULE" =================== */
3385 * Here are all of the gdb target vector functions and their friends.
3388 static ptid_t do_attach (ptid_t ptid);
3389 static void do_detach (int signo);
3390 static int register_gdb_signals (procinfo *, gdb_sigset_t *);
3391 static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum,
3392 int entry_or_exit, int mode, int from_tty);
3393 static int insert_dbx_link_breakpoint (procinfo *pi);
3394 static void remove_dbx_link_breakpoint (void);
3396 /* On mips-irix, we need to insert a breakpoint at __dbx_link during
3397 the startup phase. The following two variables are used to record
3398 the address of the breakpoint, and the code that was replaced by
3400 static int dbx_link_bpt_addr = 0;
3401 static void *dbx_link_bpt;
3404 * Function: procfs_debug_inferior
3406 * Sets up the inferior to be debugged.
3407 * Registers to trace signals, hardware faults, and syscalls.
3408 * Note: does not set RLC flag: caller may want to customize that.
3410 * Returns: zero for success (note! unlike most functions in this module)
3411 * On failure, returns the LINE NUMBER where it failed!
3415 procfs_debug_inferior (procinfo *pi)
3417 fltset_t traced_faults;
3418 gdb_sigset_t traced_signals;
3419 sysset_t *traced_syscall_entries;
3420 sysset_t *traced_syscall_exits;
3423 #ifdef PROCFS_DONT_TRACE_FAULTS
3424 /* On some systems (OSF), we don't trace hardware faults.
3425 Apparently it's enough that we catch them as signals.
3426 Wonder why we don't just do that in general? */
3427 premptyset (&traced_faults); /* don't trace faults. */
3429 /* Register to trace hardware faults in the child. */
3430 prfillset (&traced_faults); /* trace all faults... */
3431 prdelset (&traced_faults, FLTPAGE); /* except page fault. */
3433 if (!proc_set_traced_faults (pi, &traced_faults))
3436 /* Register to trace selected signals in the child. */
3437 premptyset (&traced_signals);
3438 if (!register_gdb_signals (pi, &traced_signals))
3442 /* Register to trace the 'exit' system call (on entry). */
3443 traced_syscall_entries = sysset_t_alloc (pi);
3444 gdb_premptysysset (traced_syscall_entries);
3446 gdb_praddsysset (traced_syscall_entries, SYS_exit);
3449 gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */
3452 gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit);
3454 #ifdef DYNAMIC_SYSCALLS
3456 int callnum = find_syscall (pi, "_exit");
3458 gdb_praddsysset (traced_syscall_entries, callnum);
3462 status = proc_set_traced_sysentry (pi, traced_syscall_entries);
3463 xfree (traced_syscall_entries);
3467 #ifdef PRFS_STOPEXEC /* defined on OSF */
3468 /* OSF method for tracing exec syscalls. Quoting:
3469 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
3470 exits from exec system calls because of the user level loader. */
3471 /* FIXME: make nice and maybe move into an access function. */
3475 if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
3478 prfs_flags |= PRFS_STOPEXEC;
3480 if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
3483 #else /* not PRFS_STOPEXEC */
3484 /* Everyone else's (except OSF) method for tracing exec syscalls */
3486 Not all systems with /proc have all the exec* syscalls with the same
3487 names. On the SGI, for example, there is no SYS_exec, but there
3488 *is* a SYS_execv. So, we try to account for that. */
3490 traced_syscall_exits = sysset_t_alloc (pi);
3491 gdb_premptysysset (traced_syscall_exits);
3493 gdb_praddsysset (traced_syscall_exits, SYS_exec);
3496 gdb_praddsysset (traced_syscall_exits, SYS_execve);
3499 gdb_praddsysset (traced_syscall_exits, SYS_execv);
3502 #ifdef SYS_lwpcreate
3503 gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate);
3504 gdb_praddsysset (traced_syscall_exits, SYS_lwpexit);
3507 #ifdef SYS_lwp_create /* FIXME: once only, please */
3508 gdb_praddsysset (traced_syscall_exits, SYS_lwp_create);
3509 gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit);
3512 #ifdef DYNAMIC_SYSCALLS
3514 int callnum = find_syscall (pi, "execve");
3516 gdb_praddsysset (traced_syscall_exits, callnum);
3517 callnum = find_syscall (pi, "ra_execve");
3519 gdb_praddsysset (traced_syscall_exits, callnum);
3523 status = proc_set_traced_sysexit (pi, traced_syscall_exits);
3524 xfree (traced_syscall_exits);
3528 #endif /* PRFS_STOPEXEC */
3533 procfs_attach (char *args, int from_tty)
3539 error_no_arg (_("process-id to attach"));
3542 if (pid == getpid ())
3543 error (_("Attaching GDB to itself is not a good idea..."));
3547 exec_file = get_exec_file (0);
3550 printf_filtered (_("Attaching to program `%s', %s\n"),
3551 exec_file, target_pid_to_str (pid_to_ptid (pid)));
3553 printf_filtered (_("Attaching to %s\n"),
3554 target_pid_to_str (pid_to_ptid (pid)));
3558 inferior_ptid = do_attach (pid_to_ptid (pid));
3559 push_target (&procfs_ops);
3563 procfs_detach (char *args, int from_tty)
3572 int pid = PIDGET (inferior_ptid);
3575 exec_file = get_exec_file (0);
3576 if (exec_file == NULL)
3579 printf_filtered (_("Detaching from program: %s, %s\n"), exec_file,
3580 target_pid_to_str (pid_to_ptid (pid)));
3581 gdb_flush (gdb_stdout);
3586 inferior_ptid = null_ptid;
3587 unpush_target (&procfs_ops);
3591 do_attach (ptid_t ptid)
3596 if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL)
3597 perror (_("procfs: out of memory in 'attach'"));
3599 if (!open_procinfo_files (pi, FD_CTL))
3601 fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__);
3602 sprintf (errmsg, "do_attach: couldn't open /proc file for process %d",
3604 dead_procinfo (pi, errmsg, NOKILL);
3607 /* Stop the process (if it isn't already stopped). */
3608 if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
3610 pi->was_stopped = 1;
3611 proc_prettyprint_why (proc_why (pi), proc_what (pi), 1);
3615 pi->was_stopped = 0;
3616 /* Set the process to run again when we close it. */
3617 if (!proc_set_run_on_last_close (pi))
3618 dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL);
3620 /* Now stop the process. */
3621 if (!proc_stop_process (pi))
3622 dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL);
3623 pi->ignore_next_sigstop = 1;
3625 /* Save some of the /proc state to be restored if we detach. */
3626 if (!proc_get_traced_faults (pi, &pi->saved_fltset))
3627 dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL);
3628 if (!proc_get_traced_signals (pi, &pi->saved_sigset))
3629 dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL);
3630 if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
3631 dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.",
3633 if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
3634 dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.",
3636 if (!proc_get_held_signals (pi, &pi->saved_sighold))
3637 dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL);
3639 if ((fail = procfs_debug_inferior (pi)) != 0)
3640 dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL);
3642 /* Let GDB know that the inferior was attached. */
3644 return MERGEPID (pi->pid, proc_get_current_thread (pi));
3648 do_detach (int signo)
3652 /* Find procinfo for the main process */
3653 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */
3655 if (!proc_set_current_signal (pi, signo))
3656 proc_warn (pi, "do_detach, set_current_signal", __LINE__);
3658 if (!proc_set_traced_signals (pi, &pi->saved_sigset))
3659 proc_warn (pi, "do_detach, set_traced_signal", __LINE__);
3661 if (!proc_set_traced_faults (pi, &pi->saved_fltset))
3662 proc_warn (pi, "do_detach, set_traced_faults", __LINE__);
3664 if (!proc_set_traced_sysentry (pi, pi->saved_entryset))
3665 proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__);
3667 if (!proc_set_traced_sysexit (pi, pi->saved_exitset))
3668 proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__);
3670 if (!proc_set_held_signals (pi, &pi->saved_sighold))
3671 proc_warn (pi, "do_detach, set_held_signals", __LINE__);
3673 if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)))
3674 if (signo || !(pi->was_stopped) ||
3675 query (_("Was stopped when attached, make it runnable again? ")))
3677 /* Clear any pending signal. */
3678 if (!proc_clear_current_fault (pi))
3679 proc_warn (pi, "do_detach, clear_current_fault", __LINE__);
3681 if (signo == 0 && !proc_clear_current_signal (pi))
3682 proc_warn (pi, "do_detach, clear_current_signal", __LINE__);
3684 if (!proc_set_run_on_last_close (pi))
3685 proc_warn (pi, "do_detach, set_rlc", __LINE__);
3689 destroy_procinfo (pi);
3692 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
3695 ??? Is the following note still relevant? We can't get individual
3696 registers with the PT_GETREGS ptrace(2) request either, yet we
3697 don't bother with caching at all in that case.
3699 NOTE: Since the /proc interface cannot give us individual
3700 registers, we pay no attention to REGNUM, and just fetch them all.
3701 This results in the possibility that we will do unnecessarily many
3702 fetches, since we may be called repeatedly for individual
3703 registers. So we cache the results, and mark the cache invalid
3704 when the process is resumed. */
3707 procfs_fetch_registers (struct regcache *regcache, int regnum)
3709 gdb_gregset_t *gregs;
3711 int pid = PIDGET (inferior_ptid);
3712 int tid = TIDGET (inferior_ptid);
3713 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3715 /* First look up procinfo for the main process. */
3716 pi = find_procinfo_or_die (pid, 0);
3718 /* If the event thread is not the same as GDB's requested thread
3719 (ie. inferior_ptid), then look up procinfo for the requested
3721 if (tid != 0 && tid != proc_get_current_thread (pi))
3722 pi = find_procinfo_or_die (pid, tid);
3725 error (_("procfs: fetch_registers failed to find procinfo for %s"),
3726 target_pid_to_str (inferior_ptid));
3728 gregs = proc_get_gregs (pi);
3730 proc_error (pi, "fetch_registers, get_gregs", __LINE__);
3732 supply_gregset (regcache, (const gdb_gregset_t *) gregs);
3734 if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
3736 gdb_fpregset_t *fpregs;
3738 if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
3739 || regnum == gdbarch_pc_regnum (gdbarch)
3740 || regnum == gdbarch_sp_regnum (gdbarch))
3741 return; /* Not a floating point register. */
3743 fpregs = proc_get_fpregs (pi);
3745 proc_error (pi, "fetch_registers, get_fpregs", __LINE__);
3747 supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs);
3751 /* Get ready to modify the registers array. On machines which store
3752 individual registers, this doesn't need to do anything. On
3753 machines which store all the registers in one fell swoop, such as
3754 /proc, this makes sure that registers contains all the registers
3755 from the program being debugged. */
3758 procfs_prepare_to_store (struct regcache *regcache)
3762 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
3763 this for all registers.
3765 NOTE: Since the /proc interface will not read individual registers,
3766 we will cache these requests until the process is resumed, and only
3767 then write them back to the inferior process.
3769 FIXME: is that a really bad idea? Have to think about cases where
3770 writing one register might affect the value of others, etc. */
3773 procfs_store_registers (struct regcache *regcache, int regnum)
3775 gdb_gregset_t *gregs;
3777 int pid = PIDGET (inferior_ptid);
3778 int tid = TIDGET (inferior_ptid);
3779 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3781 /* First find procinfo for main process. */
3782 pi = find_procinfo_or_die (pid, 0);
3784 /* If the event thread is not the same as GDB's requested thread
3785 (ie. inferior_ptid), then look up procinfo for the requested
3787 if (tid != 0 && tid != proc_get_current_thread (pi))
3788 pi = find_procinfo_or_die (pid, tid);
3791 error (_("procfs: store_registers: failed to find procinfo for %s"),
3792 target_pid_to_str (inferior_ptid));
3794 gregs = proc_get_gregs (pi);
3796 proc_error (pi, "store_registers, get_gregs", __LINE__);
3798 fill_gregset (regcache, gregs, regnum);
3799 if (!proc_set_gregs (pi))
3800 proc_error (pi, "store_registers, set_gregs", __LINE__);
3802 if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
3804 gdb_fpregset_t *fpregs;
3806 if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
3807 || regnum == gdbarch_pc_regnum (gdbarch)
3808 || regnum == gdbarch_sp_regnum (gdbarch))
3809 return; /* Not a floating point register. */
3811 fpregs = proc_get_fpregs (pi);
3813 proc_error (pi, "store_registers, get_fpregs", __LINE__);
3815 fill_fpregset (regcache, fpregs, regnum);
3816 if (!proc_set_fpregs (pi))
3817 proc_error (pi, "store_registers, set_fpregs", __LINE__);
3822 syscall_is_lwp_exit (procinfo *pi, int scall)
3826 if (scall == SYS_lwp_exit)
3830 if (scall == SYS_lwpexit)
3837 syscall_is_exit (procinfo *pi, int scall)
3840 if (scall == SYS_exit)
3843 #ifdef DYNAMIC_SYSCALLS
3844 if (find_syscall (pi, "_exit") == scall)
3851 syscall_is_exec (procinfo *pi, int scall)
3854 if (scall == SYS_exec)
3858 if (scall == SYS_execv)
3862 if (scall == SYS_execve)
3865 #ifdef DYNAMIC_SYSCALLS
3866 if (find_syscall (pi, "_execve"))
3868 if (find_syscall (pi, "ra_execve"))
3875 syscall_is_lwp_create (procinfo *pi, int scall)
3877 #ifdef SYS_lwp_create
3878 if (scall == SYS_lwp_create)
3881 #ifdef SYS_lwpcreate
3882 if (scall == SYS_lwpcreate)
3889 * Function: target_wait
3891 * Retrieve the next stop event from the child process.
3892 * If child has not stopped yet, wait for it to stop.
3893 * Translate /proc eventcodes (or possibly wait eventcodes)
3894 * into gdb internal event codes.
3896 * Return: id of process (and possibly thread) that incurred the event.
3897 * event codes are returned thru a pointer parameter.
3901 procfs_wait (ptid_t ptid, struct target_waitstatus *status)
3903 /* First cut: loosely based on original version 2.1 */
3907 ptid_t retval, temp_ptid;
3908 int why, what, flags;
3915 retval = pid_to_ptid (-1);
3917 /* Find procinfo for main process */
3918 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
3921 /* We must assume that the status is stale now... */
3922 pi->status_valid = 0;
3923 pi->gregs_valid = 0;
3924 pi->fpregs_valid = 0;
3926 #if 0 /* just try this out... */
3927 flags = proc_flags (pi);
3928 why = proc_why (pi);
3929 if ((flags & PR_STOPPED) && (why == PR_REQUESTED))
3930 pi->status_valid = 0; /* re-read again, IMMEDIATELY... */
3932 /* If child is not stopped, wait for it to stop. */
3933 if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) &&
3934 !proc_wait_for_stop (pi))
3936 /* wait_for_stop failed: has the child terminated? */
3937 if (errno == ENOENT)
3941 /* /proc file not found; presumably child has terminated. */
3942 wait_retval = wait (&wstat); /* "wait" for the child's exit */
3944 if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */
3945 error (_("procfs: couldn't stop process %d: wait returned %d."),
3946 PIDGET (inferior_ptid), wait_retval);
3947 /* FIXME: might I not just use waitpid?
3948 Or try find_procinfo to see if I know about this child? */
3949 retval = pid_to_ptid (wait_retval);
3951 else if (errno == EINTR)
3955 /* Unknown error from wait_for_stop. */
3956 proc_error (pi, "target_wait (wait_for_stop)", __LINE__);
3961 /* This long block is reached if either:
3962 a) the child was already stopped, or
3963 b) we successfully waited for the child with wait_for_stop.
3964 This block will analyze the /proc status, and translate it
3965 into a waitstatus for GDB.
3967 If we actually had to call wait because the /proc file
3968 is gone (child terminated), then we skip this block,
3969 because we already have a waitstatus. */
3971 flags = proc_flags (pi);
3972 why = proc_why (pi);
3973 what = proc_what (pi);
3975 if (flags & (PR_STOPPED | PR_ISTOP))
3978 /* If it's running async (for single_thread control),
3979 set it back to normal again. */
3980 if (flags & PR_ASYNC)
3981 if (!proc_unset_async (pi))
3982 proc_error (pi, "target_wait, unset_async", __LINE__);
3986 proc_prettyprint_why (why, what, 1);
3988 /* The 'pid' we will return to GDB is composed of
3989 the process ID plus the lwp ID. */
3990 retval = MERGEPID (pi->pid, proc_get_current_thread (pi));
3994 wstat = (what << 8) | 0177;
3997 if (syscall_is_lwp_exit (pi, what))
3999 printf_filtered (_("[%s exited]\n"),
4000 target_pid_to_str (retval));
4001 delete_thread (retval);
4002 status->kind = TARGET_WAITKIND_SPURIOUS;
4005 else if (syscall_is_exit (pi, what))
4007 /* Handle SYS_exit call only */
4008 /* Stopped at entry to SYS_exit.
4009 Make it runnable, resume it, then use
4010 the wait system call to get its exit code.
4011 Proc_run_process always clears the current
4013 Then return its exit status. */
4014 pi->status_valid = 0;
4016 /* FIXME: what we should do is return
4017 TARGET_WAITKIND_SPURIOUS. */
4018 if (!proc_run_process (pi, 0, 0))
4019 proc_error (pi, "target_wait, run_process", __LINE__);
4022 /* Don't call wait: simulate waiting for exit,
4023 return a "success" exit code. Bogus: what if
4024 it returns something else? */
4026 retval = inferior_ptid; /* ? ? ? */
4030 int temp = wait (&wstat);
4032 /* FIXME: shouldn't I make sure I get the right
4033 event from the right process? If (for
4034 instance) I have killed an earlier inferior
4035 process but failed to clean up after it
4036 somehow, I could get its termination event
4039 /* If wait returns -1, that's what we return to GDB. */
4041 retval = pid_to_ptid (temp);
4046 printf_filtered (_("procfs: trapped on entry to "));
4047 proc_prettyprint_syscall (proc_what (pi), 0);
4048 printf_filtered ("\n");
4051 long i, nsysargs, *sysargs;
4053 if ((nsysargs = proc_nsysarg (pi)) > 0 &&
4054 (sysargs = proc_sysargs (pi)) != NULL)
4056 printf_filtered (_("%ld syscall arguments:\n"), nsysargs);
4057 for (i = 0; i < nsysargs; i++)
4058 printf_filtered ("#%ld: 0x%08lx\n",
4066 /* How to exit gracefully, returning "unknown event" */
4067 status->kind = TARGET_WAITKIND_SPURIOUS;
4068 return inferior_ptid;
4072 /* How to keep going without returning to wfi: */
4073 target_resume (ptid, 0, TARGET_SIGNAL_0);
4079 if (syscall_is_exec (pi, what))
4081 /* Hopefully this is our own "fork-child" execing
4082 the real child. Hoax this event into a trap, and
4083 GDB will see the child about to execute its start
4085 wstat = (SIGTRAP << 8) | 0177;
4088 else if (what == SYS_syssgi)
4090 /* see if we can break on dbx_link(). If yes, then
4091 we no longer need the SYS_syssgi notifications. */
4092 if (insert_dbx_link_breakpoint (pi))
4093 proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT,
4096 /* This is an internal event and should be transparent
4097 to wfi, so resume the execution and wait again. See
4098 comment in procfs_init_inferior() for more details. */
4099 target_resume (ptid, 0, TARGET_SIGNAL_0);
4103 else if (syscall_is_lwp_create (pi, what))
4106 * This syscall is somewhat like fork/exec.
4107 * We will get the event twice: once for the parent LWP,
4108 * and once for the child. We should already know about
4109 * the parent LWP, but the child will be new to us. So,
4110 * whenever we get this event, if it represents a new
4111 * thread, simply add the thread to the list.
4114 /* If not in procinfo list, add it. */
4115 temp_tid = proc_get_current_thread (pi);
4116 if (!find_procinfo (pi->pid, temp_tid))
4117 create_procinfo (pi->pid, temp_tid);
4119 temp_ptid = MERGEPID (pi->pid, temp_tid);
4120 /* If not in GDB's thread list, add it. */
4121 if (!in_thread_list (temp_ptid))
4123 printf_filtered (_("[New %s]\n"),
4124 target_pid_to_str (temp_ptid));
4125 add_thread (temp_ptid);
4127 /* Return to WFI, but tell it to immediately resume. */
4128 status->kind = TARGET_WAITKIND_SPURIOUS;
4129 return inferior_ptid;
4131 else if (syscall_is_lwp_exit (pi, what))
4133 printf_filtered (_("[%s exited]\n"),
4134 target_pid_to_str (retval));
4135 delete_thread (retval);
4136 status->kind = TARGET_WAITKIND_SPURIOUS;
4141 /* FIXME: Do we need to handle SYS_sproc,
4142 SYS_fork, or SYS_vfork here? The old procfs
4143 seemed to use this event to handle threads on
4144 older (non-LWP) systems, where I'm assuming
4145 that threads were actually separate processes.
4146 Irix, maybe? Anyway, low priority for now. */
4150 printf_filtered (_("procfs: trapped on exit from "));
4151 proc_prettyprint_syscall (proc_what (pi), 0);
4152 printf_filtered ("\n");
4155 long i, nsysargs, *sysargs;
4157 if ((nsysargs = proc_nsysarg (pi)) > 0 &&
4158 (sysargs = proc_sysargs (pi)) != NULL)
4160 printf_filtered (_("%ld syscall arguments:\n"), nsysargs);
4161 for (i = 0; i < nsysargs; i++)
4162 printf_filtered ("#%ld: 0x%08lx\n",
4167 status->kind = TARGET_WAITKIND_SPURIOUS;
4168 return inferior_ptid;
4173 wstat = (SIGSTOP << 8) | 0177;
4178 printf_filtered (_("Retry #%d:\n"), retry);
4179 pi->status_valid = 0;
4184 /* If not in procinfo list, add it. */
4185 temp_tid = proc_get_current_thread (pi);
4186 if (!find_procinfo (pi->pid, temp_tid))
4187 create_procinfo (pi->pid, temp_tid);
4189 /* If not in GDB's thread list, add it. */
4190 temp_ptid = MERGEPID (pi->pid, temp_tid);
4191 if (!in_thread_list (temp_ptid))
4193 printf_filtered (_("[New %s]\n"),
4194 target_pid_to_str (temp_ptid));
4195 add_thread (temp_ptid);
4198 status->kind = TARGET_WAITKIND_STOPPED;
4199 status->value.sig = 0;
4204 wstat = (what << 8) | 0177;
4210 wstat = (SIGTRAP << 8) | 0177;
4215 wstat = (SIGTRAP << 8) | 0177;
4218 /* FIXME: use si_signo where possible. */
4220 #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */
4223 wstat = (SIGILL << 8) | 0177;
4226 #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */
4229 /* If we hit our __dbx_link() internal breakpoint,
4230 then remove it. See comments in procfs_init_inferior()
4231 for more details. */
4232 if (dbx_link_bpt_addr != 0
4233 && dbx_link_bpt_addr == read_pc ())
4234 remove_dbx_link_breakpoint ();
4236 wstat = (SIGTRAP << 8) | 0177;
4240 #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */
4243 wstat = (SIGSEGV << 8) | 0177;
4247 #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */
4250 wstat = (SIGFPE << 8) | 0177;
4252 case FLTPAGE: /* Recoverable page fault */
4253 default: /* FIXME: use si_signo if possible for fault */
4254 retval = pid_to_ptid (-1);
4255 printf_filtered ("procfs:%d -- ", __LINE__);
4256 printf_filtered (_("child stopped for unknown reason:\n"));
4257 proc_prettyprint_why (why, what, 1);
4258 error (_("... giving up..."));
4261 break; /* case PR_FAULTED: */
4262 default: /* switch (why) unmatched */
4263 printf_filtered ("procfs:%d -- ", __LINE__);
4264 printf_filtered (_("child stopped for unknown reason:\n"));
4265 proc_prettyprint_why (why, what, 1);
4266 error (_("... giving up..."));
4270 * Got this far without error:
4271 * If retval isn't in the threads database, add it.
4273 if (PIDGET (retval) > 0 &&
4274 !ptid_equal (retval, inferior_ptid) &&
4275 !in_thread_list (retval))
4278 * We have a new thread.
4279 * We need to add it both to GDB's list and to our own.
4280 * If we don't create a procinfo, resume may be unhappy
4283 printf_filtered (_("[New %s]\n"), target_pid_to_str (retval));
4284 add_thread (retval);
4285 if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL)
4286 create_procinfo (PIDGET (retval), TIDGET (retval));
4288 /* In addition, it's possible that this is the first
4289 * new thread we've seen, in which case we may not
4290 * have created entries for inferior_ptid yet.
4292 if (TIDGET (inferior_ptid) != 0)
4294 if (!in_thread_list (inferior_ptid))
4295 add_thread (inferior_ptid);
4296 if (find_procinfo (PIDGET (inferior_ptid),
4297 TIDGET (inferior_ptid)) == NULL)
4298 create_procinfo (PIDGET (inferior_ptid),
4299 TIDGET (inferior_ptid));
4303 else /* flags do not indicate STOPPED */
4305 /* surely this can't happen... */
4306 printf_filtered ("procfs:%d -- process not stopped.\n",
4308 proc_prettyprint_flags (flags, 1);
4309 error (_("procfs: ...giving up..."));
4314 store_waitstatus (status, wstat);
4320 /* Perform a partial transfer to/from the specified object. For
4321 memory transfers, fall back to the old memory xfer functions. */
4324 procfs_xfer_partial (struct target_ops *ops, enum target_object object,
4325 const char *annex, void *readbuf,
4326 const void *writebuf, ULONGEST offset, LONGEST len)
4330 case TARGET_OBJECT_MEMORY:
4332 return (*ops->deprecated_xfer_memory) (offset, readbuf, len,
4333 0/*write*/, NULL, ops);
4335 return (*ops->deprecated_xfer_memory) (offset, writebuf, len,
4336 1/*write*/, NULL, ops);
4340 case TARGET_OBJECT_AUXV:
4341 return procfs_xfer_auxv (ops, object, annex, readbuf, writebuf,
4346 if (ops->beneath != NULL)
4347 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
4348 readbuf, writebuf, offset, len);
4354 /* Transfer LEN bytes between GDB address MYADDR and target address
4355 MEMADDR. If DOWRITE is non-zero, transfer them to the target,
4356 otherwise transfer them from the target. TARGET is unused.
4358 The return value is 0 if an error occurred or no bytes were
4359 transferred. Otherwise, it will be a positive value which
4360 indicates the number of bytes transferred between gdb and the
4361 target. (Note that the interface also makes provisions for
4362 negative values, but this capability isn't implemented here.) */
4365 procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite,
4366 struct mem_attrib *attrib, struct target_ops *target)
4371 /* Find procinfo for main process */
4372 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
4373 if (pi->as_fd == 0 &&
4374 open_procinfo_files (pi, FD_AS) == 0)
4376 proc_warn (pi, "xfer_memory, open_proc_files", __LINE__);
4380 if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
4385 PROCFS_NOTE ("write memory: ");
4387 PROCFS_NOTE ("write memory: \n");
4389 nbytes = write (pi->as_fd, myaddr, len);
4393 PROCFS_NOTE ("read memory: \n");
4394 nbytes = read (pi->as_fd, myaddr, len);
4405 * Function: invalidate_cache
4407 * Called by target_resume before making child runnable.
4408 * Mark cached registers and status's invalid.
4409 * If there are "dirty" caches that need to be written back
4410 * to the child process, do that.
4412 * File descriptors are also cached.
4413 * As they are a limited resource, we cannot hold onto them indefinitely.
4414 * However, as they are expensive to open, we don't want to throw them
4415 * away indescriminately either. As a compromise, we will keep the
4416 * file descriptors for the parent process, but discard any file
4417 * descriptors we may have accumulated for the threads.
4420 * As this function is called by iterate_over_threads, it always
4421 * returns zero (so that iterate_over_threads will keep iterating).
4426 invalidate_cache (procinfo *parent, procinfo *pi, void *ptr)
4429 * About to run the child; invalidate caches and do any other cleanup.
4433 if (pi->gregs_dirty)
4434 if (parent == NULL ||
4435 proc_get_current_thread (parent) != pi->tid)
4436 if (!proc_set_gregs (pi)) /* flush gregs cache */
4437 proc_warn (pi, "target_resume, set_gregs",
4439 if (gdbarch_fp0_regnum (current_gdbarch) >= 0)
4440 if (pi->fpregs_dirty)
4441 if (parent == NULL ||
4442 proc_get_current_thread (parent) != pi->tid)
4443 if (!proc_set_fpregs (pi)) /* flush fpregs cache */
4444 proc_warn (pi, "target_resume, set_fpregs",
4450 /* The presence of a parent indicates that this is an LWP.
4451 Close any file descriptors that it might have open.
4452 We don't do this to the master (parent) procinfo. */
4454 close_procinfo_files (pi);
4456 pi->gregs_valid = 0;
4457 pi->fpregs_valid = 0;
4459 pi->gregs_dirty = 0;
4460 pi->fpregs_dirty = 0;
4462 pi->status_valid = 0;
4463 pi->threads_valid = 0;
4470 * Function: make_signal_thread_runnable
4472 * A callback function for iterate_over_threads.
4473 * Find the asynchronous signal thread, and make it runnable.
4474 * See if that helps matters any.
4478 make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr)
4481 if (proc_flags (pi) & PR_ASLWP)
4483 if (!proc_run_process (pi, 0, -1))
4484 proc_error (pi, "make_signal_thread_runnable", __LINE__);
4493 * Function: target_resume
4495 * Make the child process runnable. Normally we will then call
4496 * procfs_wait and wait for it to stop again (unles gdb is async).
4499 * step: if true, then arrange for the child to stop again
4500 * after executing a single instruction.
4501 * signo: if zero, then cancel any pending signal.
4502 * If non-zero, then arrange for the indicated signal
4503 * to be delivered to the child when it runs.
4504 * pid: if -1, then allow any child thread to run.
4505 * if non-zero, then allow only the indicated thread to run.
4506 ******* (not implemented yet)
4510 procfs_resume (ptid_t ptid, int step, enum target_signal signo)
4512 procinfo *pi, *thread;
4516 prrun.prflags |= PRSVADDR;
4517 prrun.pr_vaddr = $PC; set resume address
4518 prrun.prflags |= PRSTRACE; trace signals in pr_trace (all)
4519 prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE)
4520 prrun.prflags |= PRCFAULT; clear current fault.
4522 PRSTRACE and PRSFAULT can be done by other means
4523 (proc_trace_signals, proc_trace_faults)
4524 PRSVADDR is unnecessary.
4525 PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault)
4526 This basically leaves PRSTEP and PRCSIG.
4527 PRCSIG is like PIOCSSIG (proc_clear_current_signal).
4528 So basically PR_STEP is the sole argument that must be passed
4529 to proc_run_process (for use in the prrun struct by ioctl). */
4531 /* Find procinfo for main process */
4532 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
4534 /* First cut: ignore pid argument */
4537 /* Convert signal to host numbering. */
4539 (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop))
4542 native_signo = target_signal_to_host (signo);
4544 pi->ignore_next_sigstop = 0;
4546 /* Running the process voids all cached registers and status. */
4547 /* Void the threads' caches first */
4548 proc_iterate_over_threads (pi, invalidate_cache, NULL);
4549 /* Void the process procinfo's caches. */
4550 invalidate_cache (NULL, pi, NULL);
4552 if (PIDGET (ptid) != -1)
4554 /* Resume a specific thread, presumably suppressing the others. */
4555 thread = find_procinfo (PIDGET (ptid), TIDGET (ptid));
4558 if (thread->tid != 0)
4560 /* We're to resume a specific thread, and not the others.
4561 * Set the child process's PR_ASYNC flag.
4564 if (!proc_set_async (pi))
4565 proc_error (pi, "target_resume, set_async", __LINE__);
4568 proc_iterate_over_threads (pi,
4569 make_signal_thread_runnable,
4572 pi = thread; /* substitute the thread's procinfo for run */
4577 if (!proc_run_process (pi, step, native_signo))
4580 warning (_("resume: target already running. Pretend to resume, and hope for the best!"));
4582 proc_error (pi, "target_resume", __LINE__);
4587 * Function: register_gdb_signals
4589 * Traverse the list of signals that GDB knows about
4590 * (see "handle" command), and arrange for the target
4591 * to be stopped or not, according to these settings.
4593 * Returns non-zero for success, zero for failure.
4597 register_gdb_signals (procinfo *pi, gdb_sigset_t *signals)
4601 for (signo = 0; signo < NSIG; signo ++)
4602 if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
4603 signal_print_state (target_signal_from_host (signo)) == 0 &&
4604 signal_pass_state (target_signal_from_host (signo)) == 1)
4605 prdelset (signals, signo);
4607 praddset (signals, signo);
4609 return proc_set_traced_signals (pi, signals);
4613 * Function: target_notice_signals
4615 * Set up to trace signals in the child process.
4619 procfs_notice_signals (ptid_t ptid)
4621 gdb_sigset_t signals;
4622 procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0);
4624 if (proc_get_traced_signals (pi, &signals) &&
4625 register_gdb_signals (pi, &signals))
4628 proc_error (pi, "notice_signals", __LINE__);
4632 * Function: target_files_info
4634 * Print status information about the child process.
4638 procfs_files_info (struct target_ops *ignore)
4640 printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"),
4641 attach_flag? "attached": "child",
4642 target_pid_to_str (inferior_ptid));
4646 * Function: target_open
4648 * A dummy: you don't open procfs.
4652 procfs_open (char *args, int from_tty)
4654 error (_("Use the \"run\" command to start a Unix child process."));
4658 * Function: target_can_run
4660 * This tells GDB that this target vector can be invoked
4661 * for "run" or "attach".
4664 int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
4665 be a runnable target. Used by targets
4666 that can sit atop procfs, such as solaris
4671 procfs_can_run (void)
4673 /* This variable is controlled by modules that sit atop procfs that
4674 may layer their own process structure atop that provided here.
4675 sol-thread.c does this because of the Solaris two-level thread
4678 /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */
4680 return !procfs_suppress_run;
4684 * Function: target_stop
4686 * Stop the child process asynchronously, as when the
4687 * gdb user types control-c or presses a "stop" button.
4689 * Works by sending kill(SIGINT) to the child's process group.
4695 kill (-inferior_process_group, SIGINT);
4699 * Function: unconditionally_kill_inferior
4701 * Make it die. Wait for it to die. Clean up after it.
4702 * Note: this should only be applied to the real process,
4703 * not to an LWP, because of the check for parent-process.
4704 * If we need this to work for an LWP, it needs some more logic.
4708 unconditionally_kill_inferior (procinfo *pi)
4712 parent_pid = proc_parent_pid (pi);
4713 #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
4714 /* FIXME: use access functions */
4715 /* Alpha OSF/1-3.x procfs needs a clear of the current signal
4716 before the PIOCKILL, otherwise it might generate a corrupted core
4717 file for the inferior. */
4718 if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0)
4720 printf_filtered ("unconditionally_kill: SSIG failed!\n");
4723 #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
4724 /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
4725 to kill the inferior, otherwise it might remain stopped with a
4727 We do not check the result of the PIOCSSIG, the inferior might have
4730 gdb_siginfo_t newsiginfo;
4732 memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
4733 newsiginfo.si_signo = SIGKILL;
4734 newsiginfo.si_code = 0;
4735 newsiginfo.si_errno = 0;
4736 newsiginfo.si_pid = getpid ();
4737 newsiginfo.si_uid = getuid ();
4738 /* FIXME: use proc_set_current_signal */
4739 ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
4741 #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4742 if (!proc_kill (pi, SIGKILL))
4743 proc_error (pi, "unconditionally_kill, proc_kill", __LINE__);
4744 #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
4745 destroy_procinfo (pi);
4747 /* If pi is GDB's child, wait for it to die. */
4748 if (parent_pid == getpid ())
4749 /* FIXME: should we use waitpid to make sure we get the right event?
4750 Should we check the returned event? */
4755 ret = waitpid (pi->pid, &status, 0);
4763 * Function: target_kill_inferior
4765 * We're done debugging it, and we want it to go away.
4766 * Then we want GDB to forget all about it.
4770 procfs_kill_inferior (void)
4772 if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */
4774 /* Find procinfo for main process */
4775 procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0);
4778 unconditionally_kill_inferior (pi);
4779 target_mourn_inferior ();
4784 * Function: target_mourn_inferior
4786 * Forget we ever debugged this thing!
4790 procfs_mourn_inferior (void)
4794 if (!ptid_equal (inferior_ptid, null_ptid))
4796 /* Find procinfo for main process */
4797 pi = find_procinfo (PIDGET (inferior_ptid), 0);
4799 destroy_procinfo (pi);
4801 unpush_target (&procfs_ops);
4803 if (dbx_link_bpt != NULL)
4805 deprecated_remove_raw_breakpoint (dbx_link_bpt);
4806 dbx_link_bpt_addr = 0;
4807 dbx_link_bpt = NULL;
4810 generic_mourn_inferior ();
4814 * Function: init_inferior
4816 * When GDB forks to create a runnable inferior process,
4817 * this function is called on the parent side of the fork.
4818 * It's job is to do whatever is necessary to make the child
4819 * ready to be debugged, and then wait for the child to synchronize.
4823 procfs_init_inferior (int pid)
4826 gdb_sigset_t signals;
4829 /* This routine called on the parent side (GDB side)
4830 after GDB forks the inferior. */
4832 push_target (&procfs_ops);
4834 if ((pi = create_procinfo (pid, 0)) == NULL)
4835 perror ("procfs: out of memory in 'init_inferior'");
4837 if (!open_procinfo_files (pi, FD_CTL))
4838 proc_error (pi, "init_inferior, open_proc_files", __LINE__);
4842 open_procinfo_files // done
4845 procfs_notice_signals
4852 /* If not stopped yet, wait for it to stop. */
4853 if (!(proc_flags (pi) & PR_STOPPED) &&
4854 !(proc_wait_for_stop (pi)))
4855 dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL);
4857 /* Save some of the /proc state to be restored if we detach. */
4858 /* FIXME: Why? In case another debugger was debugging it?
4859 We're it's parent, for Ghu's sake! */
4860 if (!proc_get_traced_signals (pi, &pi->saved_sigset))
4861 proc_error (pi, "init_inferior, get_traced_signals", __LINE__);
4862 if (!proc_get_held_signals (pi, &pi->saved_sighold))
4863 proc_error (pi, "init_inferior, get_held_signals", __LINE__);
4864 if (!proc_get_traced_faults (pi, &pi->saved_fltset))
4865 proc_error (pi, "init_inferior, get_traced_faults", __LINE__);
4866 if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
4867 proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__);
4868 if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
4869 proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__);
4871 /* Register to trace selected signals in the child. */
4872 prfillset (&signals);
4873 if (!register_gdb_signals (pi, &signals))
4874 proc_error (pi, "init_inferior, register_signals", __LINE__);
4876 if ((fail = procfs_debug_inferior (pi)) != 0)
4877 proc_error (pi, "init_inferior (procfs_debug_inferior)", fail);
4879 /* FIXME: logically, we should really be turning OFF run-on-last-close,
4880 and possibly even turning ON kill-on-last-close at this point. But
4881 I can't make that change without careful testing which I don't have
4882 time to do right now... */
4883 /* Turn on run-on-last-close flag so that the child
4884 will die if GDB goes away for some reason. */
4885 if (!proc_set_run_on_last_close (pi))
4886 proc_error (pi, "init_inferior, set_RLC", __LINE__);
4888 /* The 'process ID' we return to GDB is composed of
4889 the actual process ID plus the lwp ID. */
4890 inferior_ptid = MERGEPID (pi->pid, proc_get_current_thread (pi));
4892 /* Typically two, one trap to exec the shell, one to exec the
4893 program being debugged. Defined by "inferior.h". */
4894 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
4897 /* On mips-irix, we need to stop the inferior early enough during
4898 the startup phase in order to be able to load the shared library
4899 symbols and insert the breakpoints that are located in these shared
4900 libraries. Stopping at the program entry point is not good enough
4901 because the -init code is executed before the execution reaches
4904 So what we need to do is to insert a breakpoint in the runtime
4905 loader (rld), more precisely in __dbx_link(). This procedure is
4906 called by rld once all shared libraries have been mapped, but before
4907 the -init code is executed. Unfortuantely, this is not straightforward,
4908 as rld is not part of the executable we are running, and thus we need
4909 the inferior to run until rld itself has been mapped in memory.
4911 For this, we trace all syssgi() syscall exit events. Each time
4912 we detect such an event, we iterate over each text memory maps,
4913 get its associated fd, and scan the symbol table for __dbx_link().
4914 When found, we know that rld has been mapped, and that we can insert
4915 the breakpoint at the symbol address. Once the dbx_link() breakpoint
4916 has been inserted, the syssgi() notifications are no longer necessary,
4917 so they should be canceled. */
4918 proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0);
4923 * Function: set_exec_trap
4925 * When GDB forks to create a new process, this function is called
4926 * on the child side of the fork before GDB exec's the user program.
4927 * Its job is to make the child minimally debuggable, so that the
4928 * parent GDB process can connect to the child and take over.
4929 * This function should do only the minimum to make that possible,
4930 * and to synchronize with the parent process. The parent process
4931 * should take care of the details.
4935 procfs_set_exec_trap (void)
4937 /* This routine called on the child side (inferior side)
4938 after GDB forks the inferior. It must use only local variables,
4939 because it may be sharing data space with its parent. */
4944 if ((pi = create_procinfo (getpid (), 0)) == NULL)
4945 perror_with_name (_("procfs: create_procinfo failed in child."));
4947 if (open_procinfo_files (pi, FD_CTL) == 0)
4949 proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__);
4950 gdb_flush (gdb_stderr);
4951 /* no need to call "dead_procinfo", because we're going to exit. */
4955 #ifdef PRFS_STOPEXEC /* defined on OSF */
4956 /* OSF method for tracing exec syscalls. Quoting:
4957 Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
4958 exits from exec system calls because of the user level loader. */
4959 /* FIXME: make nice and maybe move into an access function. */
4963 if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
4965 proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__);
4966 gdb_flush (gdb_stderr);
4969 prfs_flags |= PRFS_STOPEXEC;
4971 if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
4973 proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__);
4974 gdb_flush (gdb_stderr);
4978 #else /* not PRFS_STOPEXEC */
4979 /* Everyone else's (except OSF) method for tracing exec syscalls */
4981 Not all systems with /proc have all the exec* syscalls with the same
4982 names. On the SGI, for example, there is no SYS_exec, but there
4983 *is* a SYS_execv. So, we try to account for that. */
4985 exitset = sysset_t_alloc (pi);
4986 gdb_premptysysset (exitset);
4988 gdb_praddsysset (exitset, SYS_exec);
4991 gdb_praddsysset (exitset, SYS_execve);
4994 gdb_praddsysset (exitset, SYS_execv);
4996 #ifdef DYNAMIC_SYSCALLS
4998 int callnum = find_syscall (pi, "execve");
5001 gdb_praddsysset (exitset, callnum);
5003 callnum = find_syscall (pi, "ra_execve");
5005 gdb_praddsysset (exitset, callnum);
5007 #endif /* DYNAMIC_SYSCALLS */
5009 if (!proc_set_traced_sysexit (pi, exitset))
5011 proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__);
5012 gdb_flush (gdb_stderr);
5015 #endif /* PRFS_STOPEXEC */
5017 /* FIXME: should this be done in the parent instead? */
5018 /* Turn off inherit on fork flag so that all grand-children
5019 of gdb start with tracing flags cleared. */
5020 if (!proc_unset_inherit_on_fork (pi))
5021 proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__);
5023 /* Turn off run on last close flag, so that the child process
5024 cannot run away just because we close our handle on it.
5025 We want it to wait for the parent to attach. */
5026 if (!proc_unset_run_on_last_close (pi))
5027 proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__);
5029 /* FIXME: No need to destroy the procinfo --
5030 we have our own address space, and we're about to do an exec! */
5031 /*destroy_procinfo (pi);*/
5035 * Function: create_inferior
5037 * This function is called BEFORE gdb forks the inferior process.
5038 * Its only real responsibility is to set things up for the fork,
5039 * and tell GDB which two functions to call after the fork (one
5040 * for the parent, and one for the child).
5042 * This function does a complicated search for a unix shell program,
5043 * which it then uses to parse arguments and environment variables
5044 * to be sent to the child. I wonder whether this code could not
5045 * be abstracted out and shared with other unix targets such as
5050 procfs_create_inferior (char *exec_file, char *allargs, char **env,
5053 char *shell_file = getenv ("SHELL");
5055 if (shell_file != NULL && strchr (shell_file, '/') == NULL)
5058 /* We will be looking down the PATH to find shell_file. If we
5059 just do this the normal way (via execlp, which operates by
5060 attempting an exec for each element of the PATH until it
5061 finds one which succeeds), then there will be an exec for
5062 each failed attempt, each of which will cause a PR_SYSEXIT
5063 stop, and we won't know how to distinguish the PR_SYSEXIT's
5064 for these failed execs with the ones for successful execs
5065 (whether the exec has succeeded is stored at that time in the
5066 carry bit or some such architecture-specific and
5067 non-ABI-specified place).
5069 So I can't think of anything better than to search the PATH
5070 now. This has several disadvantages: (1) There is a race
5071 condition; if we find a file now and it is deleted before we
5072 exec it, we lose, even if the deletion leaves a valid file
5073 further down in the PATH, (2) there is no way to know exactly
5074 what an executable (in the sense of "capable of being
5075 exec'd") file is. Using access() loses because it may lose
5076 if the caller is the superuser; failing to use it loses if
5077 there are ACLs or some such. */
5081 /* FIXME-maybe: might want "set path" command so user can change what
5082 path is used from within GDB. */
5083 char *path = getenv ("PATH");
5085 struct stat statbuf;
5088 path = "/bin:/usr/bin";
5090 tryname = alloca (strlen (path) + strlen (shell_file) + 2);
5091 for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
5093 p1 = strchr (p, ':');
5098 strncpy (tryname, p, len);
5099 tryname[len] = '\0';
5100 strcat (tryname, "/");
5101 strcat (tryname, shell_file);
5102 if (access (tryname, X_OK) < 0)
5104 if (stat (tryname, &statbuf) < 0)
5106 if (!S_ISREG (statbuf.st_mode))
5107 /* We certainly need to reject directories. I'm not quite
5108 as sure about FIFOs, sockets, etc., but I kind of doubt
5109 that people want to exec() these things. */
5114 /* Not found. This must be an error rather than merely passing
5115 the file to execlp(), because execlp() would try all the
5116 exec()s, causing GDB to get confused. */
5117 error (_("procfs:%d -- Can't find shell %s in PATH"),
5118 __LINE__, shell_file);
5120 shell_file = tryname;
5123 fork_inferior (exec_file, allargs, env, procfs_set_exec_trap,
5124 procfs_init_inferior, NULL, shell_file);
5127 /* Make sure to cancel the syssgi() syscall-exit notifications.
5128 They should normally have been removed by now, but they may still
5129 be activated if the inferior doesn't use shared libraries, or if
5130 we didn't locate __dbx_link, or if we never stopped in __dbx_link.
5131 See procfs_init_inferior() for more details. */
5132 proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0),
5133 SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0);
5138 * Function: notice_thread
5140 * Callback for find_new_threads.
5141 * Calls "add_thread".
5145 procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr)
5147 ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid);
5149 if (!in_thread_list (gdb_threadid))
5150 add_thread (gdb_threadid);
5156 * Function: target_find_new_threads
5158 * Query all the threads that the target knows about,
5159 * and give them back to GDB to add to its list.
5163 procfs_find_new_threads (void)
5167 /* Find procinfo for main process */
5168 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5169 proc_update_threads (pi);
5170 proc_iterate_over_threads (pi, procfs_notice_thread, NULL);
5174 * Function: target_thread_alive
5176 * Return true if the thread is still 'alive'.
5178 * This guy doesn't really seem to be doing his job.
5179 * Got to investigate how to tell when a thread is really gone.
5183 procfs_thread_alive (ptid_t ptid)
5188 proc = PIDGET (ptid);
5189 thread = TIDGET (ptid);
5190 /* If I don't know it, it ain't alive! */
5191 if ((pi = find_procinfo (proc, thread)) == NULL)
5194 /* If I can't get its status, it ain't alive!
5195 What's more, I need to forget about it! */
5196 if (!proc_get_status (pi))
5198 destroy_procinfo (pi);
5201 /* I couldn't have got its status if it weren't alive, so it's alive. */
5205 /* Convert PTID to a string. Returns the string in a static buffer. */
5208 procfs_pid_to_str (ptid_t ptid)
5210 static char buf[80];
5212 if (TIDGET (ptid) == 0)
5213 sprintf (buf, "process %d", PIDGET (ptid));
5215 sprintf (buf, "LWP %ld", TIDGET (ptid));
5221 * Function: procfs_set_watchpoint
5222 * Insert a watchpoint
5226 procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag,
5234 pi = find_procinfo_or_die (PIDGET (ptid) == -1 ?
5235 PIDGET (inferior_ptid) : PIDGET (ptid), 0);
5237 /* Translate from GDB's flags to /proc's */
5238 if (len > 0) /* len == 0 means delete watchpoint */
5240 switch (rwflag) { /* FIXME: need an enum! */
5241 case hw_write: /* default watchpoint (write) */
5242 pflags = WRITE_WATCHFLAG;
5244 case hw_read: /* read watchpoint */
5245 pflags = READ_WATCHFLAG;
5247 case hw_access: /* access watchpoint */
5248 pflags = READ_WATCHFLAG | WRITE_WATCHFLAG;
5250 case hw_execute: /* execution HW breakpoint */
5251 pflags = EXEC_WATCHFLAG;
5253 default: /* Something weird. Return error. */
5256 if (after) /* Stop after r/w access is completed. */
5257 pflags |= AFTER_WATCHFLAG;
5260 if (!proc_set_watchpoint (pi, addr, len, pflags))
5262 if (errno == E2BIG) /* Typical error for no resources */
5263 return -1; /* fail */
5264 /* GDB may try to remove the same watchpoint twice.
5265 If a remove request returns no match, don't error. */
5266 if (errno == ESRCH && len == 0)
5267 return 0; /* ignore */
5268 proc_error (pi, "set_watchpoint", __LINE__);
5271 #endif /* UNIXWARE */
5275 /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE
5276 is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint,
5277 or bp_hardware_watchpoint. CNT is the number of watchpoints used so
5280 Note: procfs_can_use_hw_breakpoint() is not yet used by all
5281 procfs.c targets due to the fact that some of them still define
5282 TARGET_CAN_USE_HARDWARE_WATCHPOINT. */
5285 procfs_can_use_hw_breakpoint (int type, int cnt, int othertype)
5287 #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS
5290 /* Due to the way that proc_set_watchpoint() is implemented, host
5291 and target pointers must be of the same size. If they are not,
5292 we can't use hardware watchpoints. This limitation is due to the
5293 fact that proc_set_watchpoint() calls
5294 procfs_address_to_host_pointer(); a close inspection of
5295 procfs_address_to_host_pointer will reveal that an internal error
5296 will be generated when the host and target pointer sizes are
5298 if (sizeof (void *) != TYPE_LENGTH (builtin_type_void_data_ptr))
5301 /* Other tests here??? */
5308 * Function: stopped_by_watchpoint
5310 * Returns non-zero if process is stopped on a hardware watchpoint fault,
5311 * else returns zero.
5315 procfs_stopped_by_watchpoint (ptid_t ptid)
5319 pi = find_procinfo_or_die (PIDGET (ptid) == -1 ?
5320 PIDGET (inferior_ptid) : PIDGET (ptid), 0);
5322 if (!pi) /* If no process, then not stopped by watchpoint! */
5325 if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
5327 if (proc_why (pi) == PR_FAULTED)
5330 if (proc_what (pi) == FLTWATCH)
5334 if (proc_what (pi) == FLTKWATCH)
5342 #ifdef TM_I386SOL2_H
5344 * Function: procfs_find_LDT_entry
5347 * ptid_t ptid; // The GDB-style pid-plus-LWP.
5350 * pointer to the corresponding LDT entry.
5354 procfs_find_LDT_entry (ptid_t ptid)
5356 gdb_gregset_t *gregs;
5360 /* Find procinfo for the lwp. */
5361 if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL)
5363 warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%d."),
5364 PIDGET (ptid), TIDGET (ptid));
5367 /* get its general registers. */
5368 if ((gregs = proc_get_gregs (pi)) == NULL)
5370 warning (_("procfs_find_LDT_entry: could not read gregs for %d:%d."),
5371 PIDGET (ptid), TIDGET (ptid));
5374 /* Now extract the GS register's lower 16 bits. */
5375 key = (*gregs)[GS] & 0xffff;
5377 /* Find the matching entry and return it. */
5378 return proc_get_LDT_entry (pi, key);
5380 #endif /* TM_I386SOL2_H */
5383 * Memory Mappings Functions:
5387 * Function: iterate_over_mappings
5389 * Call a callback function once for each mapping, passing it the mapping,
5390 * an optional secondary callback function, and some optional opaque data.
5391 * Quit and return the first non-zero value returned from the callback.
5394 * pi -- procinfo struct for the process to be mapped.
5395 * func -- callback function to be called by this iterator.
5396 * data -- optional opaque data to be passed to the callback function.
5397 * child_func -- optional secondary function pointer to be passed
5398 * to the child function.
5400 * Return: First non-zero return value from the callback function,
5405 iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data,
5406 int (*func) (struct prmap *map,
5407 int (*child_func) (),
5410 char pathname[MAX_PROC_NAME_SIZE];
5411 struct prmap *prmaps;
5412 struct prmap *prmap;
5420 /* Get the number of mappings, allocate space,
5421 and read the mappings into prmaps. */
5424 sprintf (pathname, "/proc/%d/map", pi->pid);
5425 if ((map_fd = open (pathname, O_RDONLY)) < 0)
5426 proc_error (pi, "iterate_over_mappings (open)", __LINE__);
5428 /* Make sure it gets closed again. */
5429 make_cleanup_close (map_fd);
5431 /* Use stat to determine the file size, and compute
5432 the number of prmap_t objects it contains. */
5433 if (fstat (map_fd, &sbuf) != 0)
5434 proc_error (pi, "iterate_over_mappings (fstat)", __LINE__);
5436 nmap = sbuf.st_size / sizeof (prmap_t);
5437 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
5438 if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps))
5439 != (nmap * sizeof (*prmaps)))
5440 proc_error (pi, "iterate_over_mappings (read)", __LINE__);
5442 /* Use ioctl command PIOCNMAP to get number of mappings. */
5443 if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0)
5444 proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__);
5446 prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
5447 if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0)
5448 proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__);
5451 for (prmap = prmaps; nmap > 0; prmap++, nmap--)
5452 if ((funcstat = (*func) (prmap, child_func, data)) != 0)
5459 * Function: solib_mappings_callback
5461 * Calls the supplied callback function once for each mapped address
5462 * space in the process. The callback function receives an open
5463 * file descriptor for the file corresponding to that mapped
5464 * address space (if there is one), and the base address of the
5465 * mapped space. Quit when the callback function returns a
5466 * nonzero value, or at teh end of the mappings.
5468 * Returns: the first non-zero return value of the callback function,
5472 int solib_mappings_callback (struct prmap *map,
5473 int (*func) (int, CORE_ADDR),
5476 procinfo *pi = data;
5480 char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)];
5482 if (map->pr_vaddr == 0 && map->pr_size == 0)
5483 return -1; /* sanity */
5485 if (map->pr_mapname[0] == 0)
5487 fd = -1; /* no map file */
5491 sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname);
5492 /* Note: caller's responsibility to close this fd! */
5493 fd = open_with_retry (name, O_RDONLY);
5494 /* Note: we don't test the above call for failure;
5495 we just pass the FD on as given. Sometimes there is
5496 no file, so the open may return failure, but that's
5500 fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr);
5501 /* Note: we don't test the above call for failure;
5502 we just pass the FD on as given. Sometimes there is
5503 no file, so the ioctl may return failure, but that's
5506 return (*func) (fd, (CORE_ADDR) map->pr_vaddr);
5510 * Function: proc_iterate_over_mappings
5512 * Uses the unified "iterate_over_mappings" function
5513 * to implement the exported interface to solib-svr4.c.
5515 * Given a pointer to a function, call that function once for every
5516 * mapped address space in the process. The callback function
5517 * receives an open file descriptor for the file corresponding to
5518 * that mapped address space (if there is one), and the base address
5519 * of the mapped space. Quit when the callback function returns a
5520 * nonzero value, or at teh end of the mappings.
5522 * Returns: the first non-zero return value of the callback function,
5527 proc_iterate_over_mappings (int (*func) (int, CORE_ADDR))
5529 procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5531 return iterate_over_mappings (pi, func, pi, solib_mappings_callback);
5535 * Function: find_memory_regions_callback
5537 * Implements the to_find_memory_regions method.
5538 * Calls an external function for each memory region.
5539 * External function will have the signiture:
5541 * int callback (CORE_ADDR vaddr,
5542 * unsigned long size,
5543 * int read, int write, int execute,
5546 * Returns the integer value returned by the callback.
5550 find_memory_regions_callback (struct prmap *map,
5551 int (*func) (CORE_ADDR,
5557 return (*func) ((CORE_ADDR) map->pr_vaddr,
5559 (map->pr_mflags & MA_READ) != 0,
5560 (map->pr_mflags & MA_WRITE) != 0,
5561 (map->pr_mflags & MA_EXEC) != 0,
5566 * Function: proc_find_memory_regions
5568 * External interface. Calls a callback function once for each
5569 * mapped memory region in the child process, passing as arguments
5570 * CORE_ADDR virtual_address,
5571 * unsigned long size,
5572 * int read, TRUE if region is readable by the child
5573 * int write, TRUE if region is writable by the child
5574 * int execute TRUE if region is executable by the child.
5576 * Stops iterating and returns the first non-zero value
5577 * returned by the callback.
5581 proc_find_memory_regions (int (*func) (CORE_ADDR,
5587 procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5589 return iterate_over_mappings (pi, func, data,
5590 find_memory_regions_callback);
5593 /* Remove the breakpoint that we inserted in __dbx_link().
5594 Does nothing if the breakpoint hasn't been inserted or has already
5598 remove_dbx_link_breakpoint (void)
5600 if (dbx_link_bpt_addr == 0)
5603 if (deprecated_remove_raw_breakpoint (dbx_link_bpt) != 0)
5604 warning (_("Unable to remove __dbx_link breakpoint."));
5606 dbx_link_bpt_addr = 0;
5607 dbx_link_bpt = NULL;
5610 /* Return the address of the __dbx_link() function in the file
5611 refernced by ABFD by scanning its symbol table. Return 0 if
5612 the symbol was not found. */
5615 dbx_link_addr (bfd *abfd)
5617 long storage_needed;
5618 asymbol **symbol_table;
5619 long number_of_symbols;
5622 storage_needed = bfd_get_symtab_upper_bound (abfd);
5623 if (storage_needed <= 0)
5626 symbol_table = (asymbol **) xmalloc (storage_needed);
5627 make_cleanup (xfree, symbol_table);
5629 number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
5631 for (i = 0; i < number_of_symbols; i++)
5633 asymbol *sym = symbol_table[i];
5635 if ((sym->flags & BSF_GLOBAL)
5636 && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0)
5637 return (sym->value + sym->section->vma);
5640 /* Symbol not found, return NULL. */
5644 /* Search the symbol table of the file referenced by FD for a symbol
5645 named __dbx_link(). If found, then insert a breakpoint at this location,
5646 and return nonzero. Return zero otherwise. */
5649 insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored)
5652 long storage_needed;
5655 abfd = bfd_fdopenr ("unamed", 0, fd);
5658 warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ()));
5662 if (!bfd_check_format (abfd, bfd_object))
5664 /* Not the correct format, so we can not possibly find the dbx_link
5670 sym_addr = dbx_link_addr (abfd);
5673 /* Insert the breakpoint. */
5674 dbx_link_bpt_addr = sym_addr;
5675 dbx_link_bpt = deprecated_insert_raw_breakpoint (sym_addr);
5676 if (dbx_link_bpt == NULL)
5678 warning (_("Failed to insert dbx_link breakpoint."));
5690 /* If the given memory region MAP contains a symbol named __dbx_link,
5691 insert a breakpoint at this location and return nonzero. Return
5695 insert_dbx_link_bpt_in_region (struct prmap *map,
5696 int (*child_func) (),
5699 procinfo *pi = (procinfo *) data;
5701 /* We know the symbol we're looking for is in a text region, so
5702 only look for it if the region is a text one. */
5703 if (map->pr_mflags & MA_EXEC)
5704 return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi);
5709 /* Search all memory regions for a symbol named __dbx_link. If found,
5710 insert a breakpoint at its location, and return nonzero. Return zero
5714 insert_dbx_link_breakpoint (procinfo *pi)
5716 return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region);
5720 * Function: mappingflags
5722 * Returns an ascii representation of a memory mapping's flags.
5726 mappingflags (long flags)
5728 static char asciiflags[8];
5730 strcpy (asciiflags, "-------");
5731 #if defined (MA_PHYS)
5732 if (flags & MA_PHYS)
5733 asciiflags[0] = 'd';
5735 if (flags & MA_STACK)
5736 asciiflags[1] = 's';
5737 if (flags & MA_BREAK)
5738 asciiflags[2] = 'b';
5739 if (flags & MA_SHARED)
5740 asciiflags[3] = 's';
5741 if (flags & MA_READ)
5742 asciiflags[4] = 'r';
5743 if (flags & MA_WRITE)
5744 asciiflags[5] = 'w';
5745 if (flags & MA_EXEC)
5746 asciiflags[6] = 'x';
5747 return (asciiflags);
5751 * Function: info_mappings_callback
5753 * Callback function, does the actual work for 'info proc mappings'.
5757 info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused)
5759 char *data_fmt_string;
5761 if (gdbarch_addr_bit (current_gdbarch) == 32)
5762 data_fmt_string = "\t%#10lx %#10lx %#10x %#10x %7s\n";
5764 data_fmt_string = " %#18lx %#18lx %#10x %#10x %7s\n";
5766 printf_filtered (data_fmt_string,
5767 (unsigned long) map->pr_vaddr,
5768 (unsigned long) map->pr_vaddr + map->pr_size - 1,
5770 #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
5771 (unsigned int) map->pr_offset,
5775 mappingflags (map->pr_mflags));
5781 * Function: info_proc_mappings
5783 * Implement the "info proc mappings" subcommand.
5787 info_proc_mappings (procinfo *pi, int summary)
5789 char *header_fmt_string;
5791 if (gdbarch_ptr_bit (current_gdbarch) == 32)
5792 header_fmt_string = "\t%10s %10s %10s %10s %7s\n";
5794 header_fmt_string = " %18s %18s %10s %10s %7s\n";
5797 return; /* No output for summary mode. */
5799 printf_filtered (_("Mapped address spaces:\n\n"));
5800 printf_filtered (header_fmt_string,
5807 iterate_over_mappings (pi, NULL, NULL, info_mappings_callback);
5808 printf_filtered ("\n");
5812 * Function: info_proc_cmd
5814 * Implement the "info proc" command.
5818 info_proc_cmd (char *args, int from_tty)
5820 struct cleanup *old_chain;
5821 procinfo *process = NULL;
5822 procinfo *thread = NULL;
5829 old_chain = make_cleanup (null_cleanup, 0);
5832 if ((argv = buildargv (args)) == NULL)
5835 make_cleanup_freeargv (argv);
5837 while (argv != NULL && *argv != NULL)
5839 if (isdigit (argv[0][0]))
5841 pid = strtoul (argv[0], &tmp, 10);
5843 tid = strtoul (++tmp, NULL, 10);
5845 else if (argv[0][0] == '/')
5847 tid = strtoul (argv[0] + 1, NULL, 10);
5849 else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0)
5860 pid = PIDGET (inferior_ptid);
5862 error (_("No current process: you must name one."));
5865 /* Have pid, will travel.
5866 First see if it's a process we're already debugging. */
5867 process = find_procinfo (pid, 0);
5868 if (process == NULL)
5870 /* No. So open a procinfo for it, but
5871 remember to close it again when finished. */
5872 process = create_procinfo (pid, 0);
5873 make_cleanup (do_destroy_procinfo_cleanup, process);
5874 if (!open_procinfo_files (process, FD_CTL))
5875 proc_error (process, "info proc, open_procinfo_files", __LINE__);
5879 thread = create_procinfo (pid, tid);
5883 printf_filtered (_("process %d flags:\n"), process->pid);
5884 proc_prettyprint_flags (proc_flags (process), 1);
5885 if (proc_flags (process) & (PR_STOPPED | PR_ISTOP))
5886 proc_prettyprint_why (proc_why (process), proc_what (process), 1);
5887 if (proc_get_nthreads (process) > 1)
5888 printf_filtered ("Process has %d threads.\n",
5889 proc_get_nthreads (process));
5893 printf_filtered (_("thread %d flags:\n"), thread->tid);
5894 proc_prettyprint_flags (proc_flags (thread), 1);
5895 if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP))
5896 proc_prettyprint_why (proc_why (thread), proc_what (thread), 1);
5901 info_proc_mappings (process, 0);
5904 do_cleanups (old_chain);
5907 /* Modify the status of the system call identified by SYSCALLNUM in
5908 the set of syscalls that are currently traced/debugged.
5910 If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set
5911 will be updated. Otherwise, the exit syscalls set will be updated.
5913 If MODE is FLAG_SET, then traces will be enabled. Otherwise, they
5914 will be disabled. */
5917 proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit,
5918 int mode, int from_tty)
5922 if (entry_or_exit == PR_SYSENTRY)
5923 sysset = proc_get_traced_sysentry (pi, NULL);
5925 sysset = proc_get_traced_sysexit (pi, NULL);
5928 proc_error (pi, "proc-trace, get_traced_sysset", __LINE__);
5930 if (mode == FLAG_SET)
5931 gdb_praddsysset (sysset, syscallnum);
5933 gdb_prdelsysset (sysset, syscallnum);
5935 if (entry_or_exit == PR_SYSENTRY)
5937 if (!proc_set_traced_sysentry (pi, sysset))
5938 proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__);
5942 if (!proc_set_traced_sysexit (pi, sysset))
5943 proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__);
5948 proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode)
5952 if (PIDGET (inferior_ptid) <= 0)
5953 error (_("you must be debugging a process to use this command."));
5955 if (args == NULL || args[0] == 0)
5956 error_no_arg (_("system call to trace"));
5958 pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
5959 if (isdigit (args[0]))
5961 const int syscallnum = atoi (args);
5963 proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty);
5968 proc_trace_sysentry_cmd (char *args, int from_tty)
5970 proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET);
5974 proc_trace_sysexit_cmd (char *args, int from_tty)
5976 proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET);
5980 proc_untrace_sysentry_cmd (char *args, int from_tty)
5982 proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET);
5986 proc_untrace_sysexit_cmd (char *args, int from_tty)
5988 proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET);
5993 _initialize_procfs (void)
5996 add_target (&procfs_ops);
5997 add_info ("proc", info_proc_cmd, _("\
5998 Show /proc process information about any running process.\n\
5999 Specify process id, or use the program being debugged by default.\n\
6000 Specify keyword 'mappings' for detailed info on memory mappings."));
6001 add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd,
6002 _("Give a trace of entries into the syscall."));
6003 add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd,
6004 _("Give a trace of exits from the syscall."));
6005 add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd,
6006 _("Cancel a trace of entries into the syscall."));
6007 add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd,
6008 _("Cancel a trace of exits from the syscall."));
6011 /* =================== END, GDB "MODULE" =================== */
6015 /* miscellaneous stubs: */
6016 /* The following satisfy a few random symbols mostly created by */
6017 /* the solaris threads implementation, which I will chase down */
6021 * Return a pid for which we guarantee
6022 * we will be able to find a 'live' procinfo.
6026 procfs_first_available (void)
6028 return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1);
6031 /* =================== GCORE .NOTE "MODULE" =================== */
6032 #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT)
6033 /* gcore only implemented on solaris and unixware (so far) */
6036 procfs_do_thread_registers (bfd *obfd, ptid_t ptid,
6037 char *note_data, int *note_size)
6039 struct regcache *regcache = get_thread_regcache (ptid);
6040 gdb_gregset_t gregs;
6041 gdb_fpregset_t fpregs;
6042 unsigned long merged_pid;
6044 merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid);
6046 fill_gregset (regcache, &gregs, -1);
6047 #if defined (UNIXWARE)
6048 note_data = (char *) elfcore_write_lwpstatus (obfd,
6055 note_data = (char *) elfcore_write_prstatus (obfd,
6062 fill_fpregset (regcache, &fpregs, -1);
6063 note_data = (char *) elfcore_write_prfpreg (obfd,
6071 struct procfs_corefile_thread_data {
6078 procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data)
6080 struct procfs_corefile_thread_data *args = data;
6082 if (pi != NULL && thread->tid != 0)
6084 ptid_t saved_ptid = inferior_ptid;
6085 inferior_ptid = MERGEPID (pi->pid, thread->tid);
6086 args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid,
6089 inferior_ptid = saved_ptid;
6095 procfs_make_note_section (bfd *obfd, int *note_size)
6097 struct cleanup *old_chain;
6098 gdb_gregset_t gregs;
6099 gdb_fpregset_t fpregs;
6100 char fname[16] = {'\0'};
6101 char psargs[80] = {'\0'};
6102 procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
6103 char *note_data = NULL;
6105 struct procfs_corefile_thread_data thread_args;
6109 if (get_exec_file (0))
6111 strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname));
6112 strncpy (psargs, get_exec_file (0),
6115 inf_args = get_inferior_args ();
6116 if (inf_args && *inf_args &&
6117 strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs)))
6119 strncat (psargs, " ",
6120 sizeof (psargs) - strlen (psargs));
6121 strncat (psargs, inf_args,
6122 sizeof (psargs) - strlen (psargs));
6126 note_data = (char *) elfcore_write_prpsinfo (obfd,
6133 fill_gregset (get_current_regcache (), &gregs, -1);
6134 note_data = elfcore_write_pstatus (obfd, note_data, note_size,
6135 PIDGET (inferior_ptid),
6136 stop_signal, &gregs);
6139 thread_args.obfd = obfd;
6140 thread_args.note_data = note_data;
6141 thread_args.note_size = note_size;
6142 proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args);
6144 if (thread_args.note_data == note_data)
6146 /* iterate_over_threads didn't come up with any threads;
6147 just use inferior_ptid. */
6148 note_data = procfs_do_thread_registers (obfd, inferior_ptid,
6149 note_data, note_size);
6153 note_data = thread_args.note_data;
6156 auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV,
6160 note_data = elfcore_write_note (obfd, note_data, note_size,
6161 "CORE", NT_AUXV, auxv, auxv_len);
6165 make_cleanup (xfree, note_data);
6168 #else /* !(Solaris or Unixware) */
6170 procfs_make_note_section (bfd *obfd, int *note_size)
6172 error (_("gcore not implemented for this host."));
6173 return NULL; /* lint */
6175 #endif /* Solaris or Unixware */
6176 /* =================== END GCORE .NOTE "MODULE" =================== */